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Update libssh

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This commit is contained in:
Nicolas Viennot 2014-10-31 00:10:02 -04:00
parent 0783022d6d
commit 6e4adcc140
136 changed files with 11353 additions and 6562 deletions
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2
libssh/AUTHORS
View File

@ -1,7 +1,7 @@
Author(s):
Aris Adamantiadis <aris@0xbadc0de.be> (project initiator)
Andreas Schneider <mail@cynapses.org> (developer)
Andreas Schneider <asn@cryptomilk.org> (developer)
Nick Zitzmann <seiryu (at) comcast (dot) net> (mostly client SFTP stuff)

22
libssh/CMakeLists.txt
View File

@ -7,8 +7,8 @@ cmake_minimum_required(VERSION 2.6.0)
set(APPLICATION_NAME ${PROJECT_NAME})
set(APPLICATION_VERSION_MAJOR "0")
set(APPLICATION_VERSION_MINOR "5")
set(APPLICATION_VERSION_PATCH "90")
set(APPLICATION_VERSION_MINOR "7")
set(APPLICATION_VERSION_PATCH "0")
set(APPLICATION_VERSION "${APPLICATION_VERSION_MAJOR}.${APPLICATION_VERSION_MINOR}.${APPLICATION_VERSION_PATCH}")
@ -39,10 +39,6 @@ include(CPackConfig.cmake)
include(MacroEnsureOutOfSourceBuild)
macro_ensure_out_of_source_build("${PROJECT_NAME} requires an out of source build. Please create a separate build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there.")
# add macros
include(MacroAddPlugin)
include(MacroCopyFile)
# search for libraries
if (WITH_ZLIB)
find_package(ZLIB REQUIRED)
@ -101,18 +97,22 @@ install(
)
# cmake config files
configure_file(libssh-config.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/libssh-config.cmake @ONLY)
configure_file(libssh-config-version.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/libssh-config-version.cmake @ONLY)
set(LIBSSH_LIBRARY_NAME @CMAKE_SHARED_LIBRARY_PREFIX@ssh@CMAKE_SHARED_LIBRARY_SUFFIX@)
set(LIBSSH_THREADS_LIBRARY_NAME @CMAKE_SHARED_LIBRARY_PREFIX@ssh@CMAKE_SHARED_LIBRARY_SUFFIX@)
configure_file(${PROJECT_NAME}-config.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake @ONLY)
configure_file(${PROJECT_NAME}-config-version.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake @ONLY)
install(
FILES
${CMAKE_CURRENT_BINARY_DIR}/libssh-config.cmake
${CMAKE_CURRENT_BINARY_DIR}/libssh-config-version.cmake
${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake
${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake
DESTINATION
${CMAKE_INSTALL_DIR}
${CMAKE_INSTALL_DIR}/${PROJECT_NAME}
COMPONENT
devel
)
# in tree build settings
configure_file(libssh-build-tree-settings.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/libssh-build-tree-settings.cmake @ONLY)

2
libssh/CPackConfig.cmake
View File

@ -19,7 +19,7 @@ set(CPACK_PACKAGE_VERSION "${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSIO
### source generator
set(CPACK_SOURCE_GENERATOR "TGZ")
set(CPACK_SOURCE_IGNORE_FILES "~$;[.]swp$;/[.]svn/;/[.]git/;.gitignore;/build/;tags;cscope.*")
set(CPACK_SOURCE_IGNORE_FILES "~$;[.]swp$;/[.]svn/;/[.]git/;.gitignore;/build/;/obj/;tags;cscope.*")
set(CPACK_SOURCE_PACKAGE_FILE_NAME "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}")
if (WIN32)

10
libssh/ConfigureChecks.cmake
View File

@ -48,9 +48,11 @@ endif(CMAKE_COMPILER_IS_GNUCC AND NOT MINGW AND NOT OS2)
# HEADER FILES
check_include_file(argp.h HAVE_ARGP_H)
check_include_file(pty.h HAVE_PTY_H)
check_include_file(utmp.h HAVE_UTMP_H)
check_include_file(termios.h HAVE_TERMIOS_H)
check_include_file(unistd.h HAVE_UNISTD_H)
check_include_file(util.h HAVE_UTIL_H)
check_include_file(libutil.h HAVE_LIBUTIL_H)
if (WIN32)
check_include_files("winsock2.h;ws2tcpip.h;wspiapi.h" HAVE_WSPIAPI_H)
@ -178,11 +180,9 @@ if (GCRYPT_FOUND)
endif (GCRYPT_VERSION VERSION_GREATER "1.4.6")
endif (GCRYPT_FOUND)
if (CMAKE_HAVE_THREADS_LIBRARY)
if (CMAKE_USE_PTHREADS_INIT)
set(HAVE_PTHREAD 1)
endif (CMAKE_USE_PTHREADS_INIT)
endif (CMAKE_HAVE_THREADS_LIBRARY)
if (CMAKE_USE_PTHREADS_INIT)
set(HAVE_PTHREAD 1)
endif (CMAKE_USE_PTHREADS_INIT)
# OPTIONS
check_c_source_compiles("

0
libssh/build/.gitkeep Normal file
View File

2
libssh/cmake/Modules/AddCMockaTest.cmake
View File

@ -1,7 +1,7 @@
# - ADD_CHECK_TEST(test_name test_source linklib1 ... linklibN)
# Copyright (c) 2007 Daniel Gollub <dgollub@suse.de>
# Copyright (c) 2007-2010 Andreas Schneider <asn@cynapses.org>
# Copyright (c) 2007-2010 Andreas Schneider <asn@cryptomilk.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.

3
libssh/cmake/Modules/DefineCMakeDefaults.cmake
View File

@ -25,3 +25,6 @@ if (NOT CMAKE_BUILD_TYPE)
"Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel."
)
endif (NOT CMAKE_BUILD_TYPE)
# Create the compile command database for clang by default
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

7
libssh/cmake/Modules/DefineCompilerFlags.cmake
View File

@ -75,3 +75,10 @@ if (MSVC)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /D _CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES_COUNT=1")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /D _CRT_NONSTDC_NO_WARNINGS=1 /D _CRT_SECURE_NO_WARNINGS=1")
endif (MSVC)
# This removes this annoying warning
# "warning: 'BN_CTX_free' is deprecated: first deprecated in OS X 10.7 [-Wdeprecated-declarations]"
if (OSX)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-deprecated-declarations")
endif (OSX)

2
libssh/cmake/Modules/FindArgp.cmake
View File

@ -6,7 +6,7 @@
# ARGP_LIBRARIES - Link these to use Argp
# ARGP_DEFINITIONS - Compiler switches required for using Argp
#
# Copyright (c) 2010 Andreas Schneider <asn@cynapses.org>
# Copyright (c) 2010 Andreas Schneider <asn@cryptomilk.org>
#
# Redistribution and use is allowed according to the terms of the New
# BSD license.

2
libssh/cmake/Modules/FindNaCl.cmake
View File

@ -6,7 +6,7 @@
# NACL_LIBRARIES - Link these to use NaCl
# NACL_DEFINITIONS - Compiler switches required for using NaCl
#
# Copyright (c) 2010 Andreas Schneider <asn@cynapses.org>
# Copyright (c) 2010 Andreas Schneider <asn@cryptomilk.org>
# Copyright (c) 2013 Aris Adamantiadis <aris@badcode.be>
#
# Redistribution and use is allowed according to the terms of the New

21
libssh/cmake/Modules/MacroAddCompileFlags.cmake
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@ -1,21 +0,0 @@
# - MACRO_ADD_COMPILE_FLAGS(target_name flag1 ... flagN)
# Copyright (c) 2006, Oswald Buddenhagen, <ossi@kde.org>
# Copyright (c) 2006, Andreas Schneider, <mail@cynapses.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
macro (MACRO_ADD_COMPILE_FLAGS _target)
get_target_property(_flags ${_target} COMPILE_FLAGS)
if (_flags)
set(_flags ${_flags} ${ARGN})
else (_flags)
set(_flags ${ARGN})
endif (_flags)
set_target_properties(${_target} PROPERTIES COMPILE_FLAGS ${_flags})
endmacro (MACRO_ADD_COMPILE_FLAGS)

20
libssh/cmake/Modules/MacroAddLinkFlags.cmake
View File

@ -1,20 +0,0 @@
# - MACRO_ADD_LINK_FLAGS(target_name flag1 ... flagN)
# Copyright (c) 2006, Oswald Buddenhagen, <ossi@kde.org>
# Copyright (c) 2006, Andreas Schneider, <mail@cynapses.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
macro (MACRO_ADD_LINK_FLAGS _target)
get_target_property(_flags ${_target} LINK_FLAGS)
if (_flags)
set(_flags "${_flags} ${ARGN}")
else (_flags)
set(_flags "${ARGN}")
endif (_flags)
set_target_properties(${_target} PROPERTIES LINK_FLAGS "${_flags}")
endmacro (MACRO_ADD_LINK_FLAGS)

30
libssh/cmake/Modules/MacroAddPlugin.cmake
View File

@ -1,30 +0,0 @@
# - MACRO_ADD_PLUGIN(name [WITH_PREFIX] file1 .. fileN)
#
# Create a plugin from the given source files.
# If WITH_PREFIX is given, the resulting plugin will have the
# prefix "lib", otherwise it won't.
#
# Copyright (c) 2006, Alexander Neundorf, <neundorf@kde.org>
# Copyright (c) 2006, Laurent Montel, <montel@kde.org>
# Copyright (c) 2006, Andreas Schneider, <mail@cynapses.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
macro (MACRO_ADD_PLUGIN _target_NAME _with_PREFIX)
if (${_with_PREFIX} STREQUAL "WITH_PREFIX")
set(_first_SRC)
else (${_with_PREFIX} STREQUAL "WITH_PREFIX")
set(_first_SRC ${_with_PREFIX})
endif (${_with_PREFIX} STREQUAL "WITH_PREFIX")
add_library(${_target_NAME} MODULE ${_first_SRC} ${ARGN})
if (_first_SRC)
set_target_properties(${_target_NAME} PROPERTIES PREFIX "")
endif (_first_SRC)
endmacro (MACRO_ADD_PLUGIN _name _sources)

33
libssh/cmake/Modules/MacroCopyFile.cmake
View File

@ -1,33 +0,0 @@
# - macro_copy_file(_src _dst)
# Copies a file to ${_dst} only if ${_src} is different (newer) than ${_dst}
#
# Example:
# macro_copy_file(${CMAKE_CURRENT_SOURCE_DIR}/icon.png ${CMAKE_CURRENT_BINARY_DIR}/.)
# Copies file icon.png to ${CMAKE_CURRENT_BINARY_DIR} directory
#
# Copyright (c) 2006-2007 Wengo
# Copyright (c) 2006-2008 Andreas Schneider <mail@cynapses.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING file.
macro (macro_copy_file _src _dst)
# Removes all path containing .svn or CVS or CMakeLists.txt during the copy
if (NOT ${_src} MATCHES ".*\\.svn|CVS|CMakeLists\\.txt.*")
if (CMAKE_VERBOSE_MAKEFILE)
message(STATUS "Copy file from ${_src} to ${_dst}")
endif (CMAKE_VERBOSE_MAKEFILE)
# Creates directory if necessary
get_filename_component(_path ${_dst} PATH)
file(MAKE_DIRECTORY ${_path})
execute_process(
COMMAND
${CMAKE_COMMAND} -E copy_if_different ${_src} ${_dst}
OUTPUT_QUIET
)
endif (NOT ${_src} MATCHES ".*\\.svn|CVS|CMakeLists\\.txt.*")
endmacro (macro_copy_file)

160
libssh/cmake/Modules/UseDoxygen.cmake
View File

@ -2,10 +2,18 @@
#
# Adds a doxygen target that runs doxygen to generate the html
# and optionally the LaTeX API documentation.
# The doxygen target is added to the doc target as dependency.
# The doxygen target is added to the doc target as a dependency.
# i.e.: the API documentation is built with:
# make doc
#
# USAGE: GLOBAL INSTALL
#
# Install it with:
# cmake ./ && sudo make install
# Add the following to the CMakeLists.txt of your project:
# include(UseDoxygen OPTIONAL)
# Optionally copy Doxyfile.in in the directory of CMakeLists.txt and edit it.
#
# USAGE: INCLUDE IN PROJECT
#
# set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR})
@ -13,88 +21,120 @@
# Add the Doxyfile.in and UseDoxygen.cmake files to the projects source directory.
#
#
# CONFIGURATION
#
# To configure Doxygen you can edit Doxyfile.in and set some variables in cmake.
# Variables you may define are:
# DOXYFILE_OUTPUT_DIR - Path where the Doxygen output is stored. Defaults to "doc".
#
# DOXYFILE_LATEX_DIR - Directory where the Doxygen LaTeX output is stored. Defaults to "latex".
#
# DOXYFILE_HTML_DIR - Directory where the Doxygen html output is stored. Defaults to "html".
# DOXYFILE_SOURCE_DIR - Path where the Doxygen input files are.
# Defaults to the current source directory.
# DOXYFILE_EXTRA_SOURCES - Additional source diretories/files for Doxygen to scan.
# The Paths should be in double quotes and separated by space. e.g.:
# "${CMAKE_CURRENT_BINARY_DIR}/foo.c" "${CMAKE_CURRENT_BINARY_DIR}/bar/"
#
# DOXYFILE_OUTPUT_DIR - Path where the Doxygen output is stored.
# Defaults to "${CMAKE_CURRENT_BINARY_DIR}/doc".
#
# DOXYFILE_LATEX - ON/OFF; Set to "ON" if you want the LaTeX documentation
# to be built.
# DOXYFILE_LATEX_DIR - Directory relative to DOXYFILE_OUTPUT_DIR where
# the Doxygen LaTeX output is stored. Defaults to "latex".
#
# DOXYFILE_HTML_DIR - Directory relative to DOXYFILE_OUTPUT_DIR where
# the Doxygen html output is stored. Defaults to "html".
#
#
# Copyright (c) 2009-2010 Tobias Rautenkranz <tobias@rautenkranz.ch>
# Copyright (c) 2010 Andreas Schneider <mail@cynapses.org>
# Copyright (c) 2009, 2010, 2011 Tobias Rautenkranz <tobias@rautenkranz.ch>
#
# Redistribution and use is allowed according to the terms of the New
# BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
#
macro(usedoxygen_set_default name value)
if(NOT DEFINED "${name}")
set("${name}" "${value}")
endif()
macro(usedoxygen_set_default name value type docstring)
if(NOT DEFINED "${name}")
set("${name}" "${value}" CACHE "${type}" "${docstring}")
endif()
endmacro()
find_package(Doxygen)
if(DOXYGEN_FOUND)
find_file(DOXYFILE_IN
NAMES
doxy.config.in
PATHS
${CMAKE_CURRENT_SOURCE_DIR}
${CMAKE_ROOT}/Modules/
NO_DEFAULT_PATH)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(DOXYFILE_IN DEFAULT_MSG "DOXYFILE_IN")
find_file(DOXYFILE_IN "Doxyfile.in"
PATHS "${CMAKE_CURRENT_SOURCE_DIR}" "${CMAKE_ROOT}/Modules/"
NO_DEFAULT_PATH
DOC "Path to the doxygen configuration template file")
set(DOXYFILE "${CMAKE_CURRENT_BINARY_DIR}/Doxyfile")
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(DOXYFILE_IN DEFAULT_MSG "DOXYFILE_IN")
endif()
if(DOXYGEN_FOUND AND DOXYFILE_IN_FOUND)
add_custom_target(doxygen ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/doxy.config)
usedoxygen_set_default(DOXYFILE_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/doc"
PATH "Doxygen output directory")
usedoxygen_set_default(DOXYFILE_HTML_DIR "html"
STRING "Doxygen HTML output directory")
usedoxygen_set_default(DOXYFILE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}"
PATH "Input files source directory")
usedoxygen_set_default(DOXYFILE_EXTRA_SOURCE_DIRS ""
STRING "Additional source files/directories separated by space")
set(DOXYFILE_SOURCE_DIRS "\"${DOXYFILE_SOURCE_DIR}\" ${DOXYFILE_EXTRA_SOURCES}")
usedoxygen_set_default(DOXYFILE_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}")
usedoxygen_set_default(DOXYFILE_HTML_DIR "html")
usedoxygen_set_default(DOXYFILE_LATEX YES BOOL "Generate LaTeX API documentation" OFF)
usedoxygen_set_default(DOXYFILE_LATEX_DIR "latex" STRING "LaTex output directory")
set_property(DIRECTORY APPEND PROPERTY
ADDITIONAL_MAKE_CLEAN_FILES "${DOXYFILE_OUTPUT_DIR}/${DOXYFILE_HTML_DIR}")
mark_as_advanced(DOXYFILE_OUTPUT_DIR DOXYFILE_HTML_DIR DOXYFILE_LATEX_DIR
DOXYFILE_SOURCE_DIR DOXYFILE_EXTRA_SOURCE_DIRS DOXYFILE_IN)
set(DOXYFILE_LATEX FALSE)
set(DOXYFILE_PDFLATEX FALSE)
set(DOXYFILE_DOT FALSE)
#find_package(LATEX)
#if(LATEX_COMPILER AND MAKEINDEX_COMPILER)
# set(DOXYFILE_LATEX TRUE)
# usedoxygen_set_default(DOXYFILE_LATEX_DIR "latex")
#
# set_property(DIRECTORY APPEND PROPERTY
# ADDITIONAL_MAKE_CLEAN_FILES
# "${DOXYFILE_OUTPUT_DIR}/${DOXYFILE_LATEX_DIR}")
#
# if(PDFLATEX_COMPILER)
# set(DOXYFILE_PDFLATEX TRUE)
# endif()
# if(DOXYGEN_DOT_EXECUTABLE)
# set(DOXYFILE_DOT TRUE)
# endif()
#
# add_custom_command(TARGET doxygen
# POST_BUILD
# COMMAND ${CMAKE_MAKE_PROGRAM}
# WORKING_DIRECTORY "${DOXYFILE_OUTPUT_DIR}/${DOXYFILE_LATEX_DIR}")
#endif()
set_property(DIRECTORY
APPEND PROPERTY
ADDITIONAL_MAKE_CLEAN_FILES
"${DOXYFILE_OUTPUT_DIR}/${DOXYFILE_HTML_DIR}")
configure_file(${DOXYFILE_IN} ${CMAKE_CURRENT_BINARY_DIR}/doxy.config ESCAPE_QUOTES IMMEDIATE @ONLY)
if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/doxy.trac.in)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/doxy.trac.in ${CMAKE_CURRENT_BINARY_DIR}/doxy.trac ESCAPE_QUOTES IMMEDIATE @ONLY)
add_custom_target(doxygen-trac ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/doxy.trac)
endif()
add_custom_target(doxygen
COMMAND "${DOXYGEN_EXECUTABLE}"
"${DOXYFILE}"
COMMENT "Writing documentation to ${DOXYFILE_OUTPUT_DIR}..."
WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}")
get_target_property(DOC_TARGET doc TYPE)
if(NOT DOC_TARGET)
add_custom_target(doc)
endif()
set(DOXYFILE_DOT "NO")
if(DOXYGEN_DOT_EXECUTABLE)
set(DOXYFILE_DOT "YES")
endif()
add_dependencies(doc doxygen)
## LaTeX
set(DOXYFILE_PDFLATEX "NO")
set_property(DIRECTORY APPEND PROPERTY
ADDITIONAL_MAKE_CLEAN_FILES
"${DOXYFILE_OUTPUT_DIR}/${DOXYFILE_LATEX_DIR}")
if(DOXYFILE_LATEX STREQUAL "ON")
set(DOXYFILE_GENERATE_LATEX "YES")
find_package(LATEX)
find_program(DOXYFILE_MAKE make)
mark_as_advanced(DOXYFILE_MAKE)
if(LATEX_COMPILER AND MAKEINDEX_COMPILER AND DOXYFILE_MAKE)
if(PDFLATEX_COMPILER)
set(DOXYFILE_PDFLATEX "YES")
endif()
add_custom_command(TARGET doxygen
POST_BUILD
COMMAND "${DOXYFILE_MAKE}"
COMMENT "Running LaTeX for Doxygen documentation in ${DOXYFILE_OUTPUT_DIR}/${DOXYFILE_LATEX_DIR}..."
WORKING_DIRECTORY "${DOXYFILE_OUTPUT_DIR}/${DOXYFILE_LATEX_DIR}")
else()
set(DOXYGEN_LATEX "NO")
endif()
else()
set(DOXYFILE_GENERATE_LATEX "NO")
endif()
configure_file("${DOXYFILE_IN}" "${DOXYFILE}" @ONLY)
add_custom_target(doc)
add_dependencies(doc doxygen)
endif()

6
libssh/config.h.cmake
View File

@ -20,9 +20,15 @@
/* Define to 1 if you have the <pty.h> header file. */
#cmakedefine HAVE_PTY_H 1
/* Define to 1 if you have the <utmp.h> header file. */
#cmakedefine HAVE_UTMP_H 1
/* Define to 1 if you have the <util.h> header file. */
#cmakedefine HAVE_UTIL_H 1
/* Define to 1 if you have the <libutil.h> header file. */
#cmakedefine HAVE_LIBUTIL_H 1
/* Define to 1 if you have the <termios.h> header file. */
#cmakedefine HAVE_TERMIOS_H 1

2
libssh/doc/doxy.config.in → libssh/doc/Doxyfile.in
View File

@ -721,7 +721,7 @@ EXCLUDE_SYMLINKS = NO
EXCLUDE_PATTERNS = */.git/* \
*/.svn/* \
*/cmake/* \
*/build/*
*/obj/*
# The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names
# (namespaces, classes, functions, etc.) that should be excluded from the

4
libssh/doc/authentication.dox
View File

@ -285,7 +285,7 @@ int authenticate_kbdint(ssh_session session)
{
int rc;
rc = ssh_userauth_none(session, NULL, NULL);
rc = ssh_userauth_none(session, NULL);
return rc;
}
@endcode
@ -304,7 +304,7 @@ int test_several_auth_methods(ssh_session session)
{
int method, rc;
rc = ssh_userauth_none(session, NULL, NULL);
rc = ssh_userauth_none(session, NULL);
if (rc != SSH_AUTH_SUCCESS) {
return rc;
}

1546
libssh/doc/doxy.trac.in
View File

File diff suppressed because it is too large Load Diff

11
libssh/doc/forwarding.dox
View File

@ -144,10 +144,10 @@ or whatever use you have for it.
@subsection libssh_reverse Doing reverse port forwarding with libssh
To do reverse port forwarding, call ssh_forward_listen(),
then ssh_forward_accept().
To do reverse port forwarding, call ssh_channel_listen_forward(),
then ssh_channel_accept_forward().
When you call ssh_forward_listen(), you can let the remote server
When you call ssh_channel_listen_forward(), you can let the remote server
chose the non-priviledged port it should listen to. Otherwise, you can chose
your own priviledged or non-priviledged port. Beware that you should have
administrative priviledges on the remote server to open a priviledged port
@ -164,6 +164,7 @@ int web_server(ssh_session session)
ssh_channel channel;
char buffer[256];
int nbytes, nwritten;
int port = 0;
char *helloworld = ""
"HTTP/1.1 200 OK\n"
"Content-Type: text/html\n"
@ -178,7 +179,7 @@ int web_server(ssh_session session)
" </body>\n"
"</html>\n";
rc = ssh_forward_listen(session, NULL, 8080, NULL);
rc = ssh_channel_listen_forward(session, NULL, 8080, NULL);
if (rc != SSH_OK)
{
fprintf(stderr, "Error opening remote port: %s\n",
@ -186,7 +187,7 @@ int web_server(ssh_session session)
return rc;
}
channel = ssh_forward_accept(session, 60000);
channel = ssh_channel_accept_forward(session, 60000, &port);
if (channel == NULL)
{
fprintf(stderr, "Error waiting for incoming connection: %s\n",

1
libssh/doc/threading.dox
View File

@ -61,5 +61,6 @@ implement the following methods :
- mutex_destroy
- thread_id
libgcrypt 1.6 and bigger backend does not support custom callback. Using anything else than pthreads (ssh_threads_get_pthread()) here will fail.
Good luck !
*/

13
libssh/examples/CMakeLists.txt
View File

@ -25,13 +25,6 @@ if (UNIX AND NOT WIN32)
add_executable(sshnetcat sshnetcat.c ${examples_SRCS})
target_link_libraries(sshnetcat ${LIBSSH_SHARED_LIBRARY})
if (WITH_SERVER)
if (HAVE_LIBUTIL)
add_executable(samplesshd-tty samplesshd-tty.c)
target_link_libraries(samplesshd-tty ${LIBSSH_SHARED_LIBRARY} ${ARGP_LIBRARIES} util)
endif (HAVE_LIBUTIL)
endif (WITH_SERVER)
if (WITH_SFTP)
add_executable(samplesftp samplesftp.c ${examples_SRCS})
target_link_libraries(samplesftp ${LIBSSH_SHARED_LIBRARY})
@ -41,8 +34,10 @@ if (UNIX AND NOT WIN32)
target_link_libraries(samplessh ${LIBSSH_SHARED_LIBRARY})
if (WITH_SERVER)
add_executable(samplesshd samplesshd.c)
target_link_libraries(samplesshd ${LIBSSH_SHARED_LIBRARY} ${ARGP_LIBRARIES})
if (HAVE_LIBUTIL)
add_executable(ssh_server_fork ssh_server_fork.c)
target_link_libraries(ssh_server_fork ${LIBSSH_SHARED_LIBRARY} ${ARGP_LIBRARIES} util)
endif (HAVE_LIBUTIL)
if (WITH_GSSAPI AND GSSAPI_FOUND)
add_executable(samplesshd-cb samplesshd-cb.c)

8
libssh/examples/authentication.c
View File

@ -116,7 +116,7 @@ int authenticate_console(ssh_session session){
return rc;
}
method = ssh_auth_list(session);
method = ssh_userauth_list(session, NULL);
while (rc != SSH_AUTH_SUCCESS) {
if (method & SSH_AUTH_METHOD_GSSAPI_MIC){
rc = ssh_userauth_gssapi(session);
@ -129,10 +129,10 @@ int authenticate_console(ssh_session session){
}
// Try to authenticate with public key first
if (method & SSH_AUTH_METHOD_PUBLICKEY) {
rc = ssh_userauth_autopubkey(session, NULL);
rc = ssh_userauth_publickey_auto(session, NULL, NULL);
if (rc == SSH_AUTH_ERROR) {
error(session);
return rc;
error(session);
return rc;
} else if (rc == SSH_AUTH_SUCCESS) {
break;
}

466
libssh/examples/samplesshd-tty.c
View File

@ -1,466 +0,0 @@
/* This is a sample implementation of a libssh based SSH server */
/*
Copyright 2003-2011 Aris Adamantiadis
This file is part of the SSH Library
You are free to copy this file, modify it in any way, consider it being public
domain. This does not apply to the rest of the library though, but it is
allowed to cut-and-paste working code from this file to any license of
program.
The goal is to show the API in action. It's not a reference on how terminal
clients must be made or how a client should react.
*/
#include "config.h"
#include <libssh/libssh.h>
#include <libssh/server.h>
#include <libssh/callbacks.h>
#ifdef HAVE_ARGP_H
#include <argp.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <poll.h>
#ifdef HAVE_PTY_H
#include <pty.h>
#endif
#ifdef HAVE_UTIL_H
#include <util.h>
#endif
#define SSHD_USER "libssh"
#define SSHD_PASSWORD "libssh"
#ifndef KEYS_FOLDER
#ifdef _WIN32
#define KEYS_FOLDER
#else
#define KEYS_FOLDER "/etc/ssh/"
#endif
#endif
#ifdef WITH_PCAP
const char *pcap_file="debug.server.pcap";
ssh_pcap_file pcap;
static void set_pcap(ssh_session session){
if(!pcap_file)
return;
pcap=ssh_pcap_file_new();
if(ssh_pcap_file_open(pcap,pcap_file) == SSH_ERROR){
printf("Error opening pcap file\n");
ssh_pcap_file_free(pcap);
pcap=NULL;
return;
}
ssh_set_pcap_file(session,pcap);
}
static void cleanup_pcap(){
ssh_pcap_file_free(pcap);
pcap=NULL;
}
#endif
static int auth_password(const char *user, const char *password){
if(strcmp(user, SSHD_USER))
return 0;
if(strcmp(password, SSHD_PASSWORD))
return 0;
return 1; // authenticated
}
#ifdef HAVE_ARGP_H
const char *argp_program_version = "libssh server example "
SSH_STRINGIFY(LIBSSH_VERSION);
const char *argp_program_bug_address = "<libssh@libssh.org>";
/* Program documentation. */
static char doc[] = "libssh -- a Secure Shell protocol implementation";
/* A description of the arguments we accept. */
static char args_doc[] = "BINDADDR";
static int port = 22;
/* The options we understand. */
static struct argp_option options[] = {
{
.name = "port",
.key = 'p',
.arg = "PORT",
.flags = 0,
.doc = "Set the port to bind.",
.group = 0
},
{
.name = "hostkey",
.key = 'k',
.arg = "FILE",
.flags = 0,
.doc = "Set the host key.",
.group = 0
},
{
.name = "dsakey",
.key = 'd',
.arg = "FILE",
.flags = 0,
.doc = "Set the dsa key.",
.group = 0
},
{
.name = "rsakey",
.key = 'r',
.arg = "FILE",
.flags = 0,
.doc = "Set the rsa key.",
.group = 0
},
{
.name = "verbose",
.key = 'v',
.arg = NULL,
.flags = 0,
.doc = "Get verbose output.",
.group = 0
},
{NULL, 0, 0, 0, NULL, 0}
};
/* Parse a single option. */
static error_t parse_opt (int key, char *arg, struct argp_state *state) {
/* Get the input argument from argp_parse, which we
* know is a pointer to our arguments structure.
*/
ssh_bind sshbind = state->input;
switch (key) {
case 'p':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDPORT_STR, arg);
port = atoi(arg);
break;
case 'd':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_DSAKEY, arg);
break;
case 'k':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY, arg);
break;
case 'r':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_RSAKEY, arg);
break;
case 'v':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_LOG_VERBOSITY_STR, "3");
break;
case ARGP_KEY_ARG:
if (state->arg_num >= 1) {
/* Too many arguments. */
argp_usage (state);
}
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDADDR, arg);
break;
case ARGP_KEY_END:
if (state->arg_num < 1) {
/* Not enough arguments. */
argp_usage (state);
}
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
/* Our argp parser. */
static struct argp argp = {options, parse_opt, args_doc, doc, NULL, NULL, NULL};
#endif /* HAVE_ARGP_H */
static int authenticate(ssh_session session) {
ssh_message message;
do {
message=ssh_message_get(session);
if(!message)
break;
switch(ssh_message_type(message)){
case SSH_REQUEST_AUTH:
switch(ssh_message_subtype(message)){
case SSH_AUTH_METHOD_PASSWORD:
printf("User %s wants to auth with pass %s\n",
ssh_message_auth_user(message),
ssh_message_auth_password(message));
if(auth_password(ssh_message_auth_user(message),
ssh_message_auth_password(message))){
ssh_message_auth_reply_success(message,0);
ssh_message_free(message);
return 1;
}
ssh_message_auth_set_methods(message,
SSH_AUTH_METHOD_PASSWORD |
SSH_AUTH_METHOD_INTERACTIVE);
// not authenticated, send default message
ssh_message_reply_default(message);
break;
case SSH_AUTH_METHOD_NONE:
default:
printf("User %s wants to auth with unknown auth %d\n",
ssh_message_auth_user(message),
ssh_message_subtype(message));
ssh_message_auth_set_methods(message,
SSH_AUTH_METHOD_PASSWORD |
SSH_AUTH_METHOD_INTERACTIVE);
ssh_message_reply_default(message);
break;
}
break;
default:
ssh_message_auth_set_methods(message,
SSH_AUTH_METHOD_PASSWORD |
SSH_AUTH_METHOD_INTERACTIVE);
ssh_message_reply_default(message);
}
ssh_message_free(message);
} while (1);
return 0;
}
static int copy_fd_to_chan(socket_t fd, int revents, void *userdata) {
ssh_channel chan = (ssh_channel)userdata;
char buf[2048];
int sz = 0;
if(!chan) {
close(fd);
return -1;
}
if(revents & POLLIN) {
sz = read(fd, buf, 2048);
if(sz > 0) {
ssh_channel_write(chan, buf, sz);
}
}
if(revents & POLLHUP) {
ssh_channel_close(chan);
sz = -1;
}
return sz;
}
static int copy_chan_to_fd(ssh_session session,
ssh_channel channel,
void *data,
uint32_t len,
int is_stderr,
void *userdata) {
int fd = *(int*)userdata;
int sz;
(void)session;
(void)channel;
(void)is_stderr;
sz = write(fd, data, len);
return sz;
}
static void chan_close(ssh_session session, ssh_channel channel, void *userdata) {
int fd = *(int*)userdata;
(void)session;
(void)channel;
close(fd);
}
struct ssh_channel_callbacks_struct cb = {
.channel_data_function = copy_chan_to_fd,
.channel_eof_function = chan_close,
.channel_close_function = chan_close,
.userdata = NULL
};
static int main_loop(ssh_channel chan) {
ssh_session session = ssh_channel_get_session(chan);
socket_t fd;
struct termios *term = NULL;
struct winsize *win = NULL;
pid_t childpid;
ssh_event event;
short events;
int rc;
childpid = forkpty(&fd, NULL, term, win);
if(childpid == 0) {
execl("/bin/bash", "/bin/bash", (char *)NULL);
abort();
}
cb.userdata = &fd;
ssh_callbacks_init(&cb);
ssh_set_channel_callbacks(chan, &cb);
events = POLLIN | POLLPRI | POLLERR | POLLHUP | POLLNVAL;
event = ssh_event_new();
if(event == NULL) {
printf("Couldn't get a event\n");
return -1;
}
if(ssh_event_add_fd(event, fd, events, copy_fd_to_chan, chan) != SSH_OK) {
printf("Couldn't add an fd to the event\n");
ssh_event_free(event);
return -1;
}
if(ssh_event_add_session(event, session) != SSH_OK) {
printf("Couldn't add the session to the event\n");
ssh_event_remove_fd(event, fd);
ssh_event_free(event);
return -1;
}
do {
rc = ssh_event_dopoll(event, 1000);
if (rc == SSH_ERROR){
fprintf(stderr, "Error : %s\n", ssh_get_error(session));
ssh_event_free(event);
ssh_disconnect(session);
return -1;
}
} while(!ssh_channel_is_closed(chan));
ssh_event_remove_fd(event, fd);
ssh_event_remove_session(event, session);
ssh_event_free(event);
return 0;
}
int main(int argc, char **argv){
ssh_session session;
ssh_bind sshbind;
ssh_message message;
ssh_channel chan=0;
int auth=0;
int shell=0;
int r;
sshbind=ssh_bind_new();
session=ssh_new();
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_DSAKEY,
KEYS_FOLDER "ssh_host_dsa_key");
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_RSAKEY,
KEYS_FOLDER "ssh_host_rsa_key");
#ifdef HAVE_ARGP_H
/*
* Parse our arguments; every option seen by parse_opt will
* be reflected in arguments.
*/
argp_parse (&argp, argc, argv, 0, 0, sshbind);
#else
(void) argc;
(void) argv;
#endif
#ifdef WITH_PCAP
set_pcap(session);
#endif
if(ssh_bind_listen(sshbind)<0){
printf("Error listening to socket: %s\n", ssh_get_error(sshbind));
return 1;
}
printf("Started sample libssh sshd on port %d\n", port);
printf("You can login as the user %s with the password %s\n", SSHD_USER,
SSHD_PASSWORD);
r = ssh_bind_accept(sshbind, session);
if(r==SSH_ERROR){
printf("Error accepting a connection: %s\n", ssh_get_error(sshbind));
return 1;
}
if (ssh_handle_key_exchange(session)) {
printf("ssh_handle_key_exchange: %s\n", ssh_get_error(session));
return 1;
}
/* proceed to authentication */
auth = authenticate(session);
if(!auth){
printf("Authentication error: %s\n", ssh_get_error(session));
ssh_disconnect(session);
return 1;
}
/* wait for a channel session */
do {
message = ssh_message_get(session);
if(message){
if(ssh_message_type(message) == SSH_REQUEST_CHANNEL_OPEN &&
ssh_message_subtype(message) == SSH_CHANNEL_SESSION) {
chan = ssh_message_channel_request_open_reply_accept(message);
ssh_message_free(message);
break;
} else {
ssh_message_reply_default(message);
ssh_message_free(message);
}
} else {
break;
}
} while(!chan);
if(!chan) {
printf("Error: cleint did not ask for a channel session (%s)\n",
ssh_get_error(session));
ssh_finalize();
return 1;
}
/* wait for a shell */
do {
message = ssh_message_get(session);
if(message != NULL) {
if(ssh_message_type(message) == SSH_REQUEST_CHANNEL) {
if(ssh_message_subtype(message) == SSH_CHANNEL_REQUEST_SHELL) {
shell = 1;
ssh_message_channel_request_reply_success(message);
ssh_message_free(message);
break;
} else if(ssh_message_subtype(message) == SSH_CHANNEL_REQUEST_PTY) {
ssh_message_channel_request_reply_success(message);
ssh_message_free(message);
continue;
}
}
ssh_message_reply_default(message);
ssh_message_free(message);
} else {
break;
}
} while(!shell);
if(!shell) {
printf("Error: No shell requested (%s)\n", ssh_get_error(session));
return 1;
}
printf("it works !\n");
main_loop(chan);
ssh_disconnect(session);
ssh_bind_free(sshbind);
#ifdef WITH_PCAP
cleanup_pcap();
#endif
ssh_finalize();
return 0;
}

314
libssh/examples/samplesshd.c
View File

@ -1,314 +0,0 @@
/* This is a sample implementation of a libssh based SSH server */
/*
Copyright 2003-2009 Aris Adamantiadis
This file is part of the SSH Library
You are free to copy this file, modify it in any way, consider it being public
domain. This does not apply to the rest of the library though, but it is
allowed to cut-and-paste working code from this file to any license of
program.
The goal is to show the API in action. It's not a reference on how terminal
clients must be made or how a client should react.
*/
#include "config.h"
#include <libssh/libssh.h>
#include <libssh/server.h>
#ifdef HAVE_ARGP_H
#include <argp.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#ifndef KEYS_FOLDER
#ifdef _WIN32
#define KEYS_FOLDER
#else
#define KEYS_FOLDER "/etc/ssh/"
#endif
#endif
#ifdef WITH_PCAP
static const char *pcap_file="debug.server.pcap";
static ssh_pcap_file pcap;
static void set_pcap(ssh_session session) {
if(!pcap_file)
return;
pcap=ssh_pcap_file_new();
if(ssh_pcap_file_open(pcap,pcap_file) == SSH_ERROR){
printf("Error opening pcap file\n");
ssh_pcap_file_free(pcap);
pcap=NULL;
return;
}
ssh_set_pcap_file(session,pcap);
}
static void cleanup_pcap(void) {
ssh_pcap_file_free(pcap);
pcap=NULL;
}
#endif
static int auth_password(const char *user, const char *password){
if(strcmp(user,"aris"))
return 0;
if(strcmp(password,"lala"))
return 0;
return 1; // authenticated
}
#ifdef HAVE_ARGP_H
const char *argp_program_version = "libssh server example "
SSH_STRINGIFY(LIBSSH_VERSION);
const char *argp_program_bug_address = "<libssh@libssh.org>";
/* Program documentation. */
static char doc[] = "libssh -- a Secure Shell protocol implementation";
/* A description of the arguments we accept. */
static char args_doc[] = "BINDADDR";
/* The options we understand. */
static struct argp_option options[] = {
{
.name = "port",
.key = 'p',
.arg = "PORT",
.flags = 0,
.doc = "Set the port to bind.",
.group = 0
},
{
.name = "hostkey",
.key = 'k',
.arg = "FILE",
.flags = 0,
.doc = "Set the host key.",
.group = 0
},
{
.name = "dsakey",
.key = 'd',
.arg = "FILE",
.flags = 0,
.doc = "Set the dsa key.",
.group = 0
},
{
.name = "rsakey",
.key = 'r',
.arg = "FILE",
.flags = 0,
.doc = "Set the rsa key.",
.group = 0
},
{
.name = "verbose",
.key = 'v',
.arg = NULL,
.flags = 0,
.doc = "Get verbose output.",
.group = 0
},
{NULL, 0, NULL, 0, NULL, 0}
};
/* Parse a single option. */
static error_t parse_opt (int key, char *arg, struct argp_state *state) {
/* Get the input argument from argp_parse, which we
* know is a pointer to our arguments structure.
*/
ssh_bind sshbind = state->input;
switch (key) {
case 'p':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDPORT_STR, arg);
break;
case 'd':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_DSAKEY, arg);
break;
case 'k':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY, arg);
break;
case 'r':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_RSAKEY, arg);
break;
case 'v':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_LOG_VERBOSITY_STR, "3");
break;
case ARGP_KEY_ARG:
if (state->arg_num >= 1) {
/* Too many arguments. */
argp_usage (state);
}
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDADDR, arg);
break;
case ARGP_KEY_END:
if (state->arg_num < 1) {
/* Not enough arguments. */
argp_usage (state);
}
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
/* Our argp parser. */
static struct argp argp = {options, parse_opt, args_doc, doc, NULL, NULL, NULL};
#endif /* HAVE_ARGP_H */
int main(int argc, char **argv){
ssh_session session;
ssh_bind sshbind;
ssh_message message;
ssh_channel chan=0;
char buf[2048];
int auth=0;
int sftp=0;
int i;
int r;
sshbind=ssh_bind_new();
session=ssh_new();
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_DSAKEY, KEYS_FOLDER "ssh_host_dsa_key");
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_RSAKEY, KEYS_FOLDER "ssh_host_rsa_key");
#ifdef HAVE_ARGP_H
/*
* Parse our arguments; every option seen by parse_opt will
* be reflected in arguments.
*/
argp_parse (&argp, argc, argv, 0, 0, sshbind);
#else
(void) argc;
(void) argv;
#endif
#ifdef WITH_PCAP
set_pcap(session);
#endif
if(ssh_bind_listen(sshbind)<0){
printf("Error listening to socket: %s\n",ssh_get_error(sshbind));
return 1;
}
r=ssh_bind_accept(sshbind,session);
if(r==SSH_ERROR){
printf("error accepting a connection : %s\n",ssh_get_error(sshbind));
return 1;
}
if (ssh_handle_key_exchange(session)) {
printf("ssh_handle_key_exchange: %s\n", ssh_get_error(session));
return 1;
}
do {
message=ssh_message_get(session);
if(!message)
break;
switch(ssh_message_type(message)){
case SSH_REQUEST_AUTH:
switch(ssh_message_subtype(message)){
case SSH_AUTH_METHOD_PASSWORD:
printf("User %s wants to auth with pass %s\n",
ssh_message_auth_user(message),
ssh_message_auth_password(message));
if(auth_password(ssh_message_auth_user(message),
ssh_message_auth_password(message))){
auth=1;
ssh_message_auth_reply_success(message,0);
break;
}
// not authenticated, send default message
case SSH_AUTH_METHOD_NONE:
default:
ssh_message_auth_set_methods(message,SSH_AUTH_METHOD_PASSWORD);
ssh_message_reply_default(message);
break;
}
break;
default:
ssh_message_reply_default(message);
}
ssh_message_free(message);
} while (!auth);
if(!auth){
printf("auth error: %s\n",ssh_get_error(session));
ssh_disconnect(session);
return 1;
}
do {
message=ssh_message_get(session);
if(message){
switch(ssh_message_type(message)){
case SSH_REQUEST_CHANNEL_OPEN:
if(ssh_message_subtype(message)==SSH_CHANNEL_SESSION){
chan=ssh_message_channel_request_open_reply_accept(message);
break;
}
default:
ssh_message_reply_default(message);
}
ssh_message_free(message);
}
} while(message && !chan);
if(!chan){
printf("error : %s\n",ssh_get_error(session));
ssh_finalize();
return 1;
}
do {
message=ssh_message_get(session);
if(message && ssh_message_type(message)==SSH_REQUEST_CHANNEL &&
(ssh_message_subtype(message)==SSH_CHANNEL_REQUEST_SHELL ||
ssh_message_subtype(message)==SSH_CHANNEL_REQUEST_PTY)) {
// if(!strcmp(ssh_message_channel_request_subsystem(message),"sftp")){
sftp=1;
ssh_message_channel_request_reply_success(message);
break;
// }
}
if(!sftp){
ssh_message_reply_default(message);
}
ssh_message_free(message);
} while (message && !sftp);
if(!sftp){
printf("error : %s\n",ssh_get_error(session));
return 1;
}
printf("it works !\n");
do{
i=ssh_channel_read(chan,buf, 2048, 0);
if(i>0) {
ssh_channel_write(chan, buf, i);
if (write(1,buf,i) < 0) {
printf("error writing to buffer\n");
return 1;
}
if (buf[0] == '\x0d') {
if (write(1, "\n", 1) < 0) {
printf("error writing to buffer\n");
return 1;
}
ssh_channel_write(chan, "\n", 1);
}
}
} while (i>0);
ssh_disconnect(session);
ssh_bind_free(sshbind);
#ifdef WITH_PCAP
cleanup_pcap();
#endif
ssh_finalize();
return 0;
}

697
libssh/examples/ssh_server_fork.c Normal file
View File

@ -0,0 +1,697 @@
/* This is a sample implementation of a libssh based SSH server */
/*
Copyright 2014 Audrius Butkevicius
This file is part of the SSH Library
You are free to copy this file, modify it in any way, consider it being public
domain. This does not apply to the rest of the library though, but it is
allowed to cut-and-paste working code from this file to any license of
program.
The goal is to show the API in action.
*/
#include "config.h"
#include <libssh/callbacks.h>
#include <libssh/poll.h>
#include <libssh/server.h>
#ifdef HAVE_ARGP_H
#include <argp.h>
#endif
#include <fcntl.h>
#ifdef HAVE_LIBUTIL_H
#include <libutil.h>
#endif
#ifdef HAVE_PTY_H
#include <pty.h>
#endif
#include <signal.h>
#include <stdlib.h>
#ifdef HAVE_UTMP_H
#include <utmp.h>
#endif
#ifdef HAVE_UTIL_H
#include <util.h>
#endif
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <stdio.h>
#ifndef KEYS_FOLDER
#ifdef _WIN32
#define KEYS_FOLDER
#else
#define KEYS_FOLDER "/etc/ssh/"
#endif
#endif
#define USER "myuser"
#define PASS "mypassword"
#define BUF_SIZE 1048576
#define SESSION_END (SSH_CLOSED | SSH_CLOSED_ERROR)
#define SFTP_SERVER_PATH "/usr/lib/sftp-server"
static void set_default_keys(ssh_bind sshbind,
int rsa_already_set,
int dsa_already_set,
int ecdsa_already_set) {
if (!rsa_already_set) {
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_RSAKEY,
KEYS_FOLDER "ssh_host_rsa_key");
}
if (!dsa_already_set) {
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_DSAKEY,
KEYS_FOLDER "ssh_host_dsa_key");
}
if (!ecdsa_already_set) {
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_ECDSAKEY,
KEYS_FOLDER "ssh_host_ecdsa_key");
}
}
#ifdef HAVE_ARGP_H
const char *argp_program_version = "libssh server example "
SSH_STRINGIFY(LIBSSH_VERSION);
const char *argp_program_bug_address = "<libssh@libssh.org>";
/* Program documentation. */
static char doc[] = "libssh -- a Secure Shell protocol implementation";
/* A description of the arguments we accept. */
static char args_doc[] = "BINDADDR";
/* The options we understand. */
static struct argp_option options[] = {
{
.name = "port",
.key = 'p',
.arg = "PORT",
.flags = 0,
.doc = "Set the port to bind.",
.group = 0
},
{
.name = "hostkey",
.key = 'k',
.arg = "FILE",
.flags = 0,
.doc = "Set a host key. Can be used multiple times. "
"Implies no default keys.",
.group = 0
},
{
.name = "dsakey",
.key = 'd',
.arg = "FILE",
.flags = 0,
.doc = "Set the dsa key.",
.group = 0
},
{
.name = "rsakey",
.key = 'r',
.arg = "FILE",
.flags = 0,
.doc = "Set the rsa key.",
.group = 0
},
{
.name = "ecdsakey",
.key = 'e',
.arg = "FILE",
.flags = 0,
.doc = "Set the ecdsa key.",
.group = 0
},
{
.name = "no-default-keys",
.key = 'n',
.arg = NULL,
.flags = 0,
.doc = "Do not set default key locations.",
.group = 0
},
{
.name = "verbose",
.key = 'v',
.arg = NULL,
.flags = 0,
.doc = "Get verbose output.",
.group = 0
},
{NULL, 0, NULL, 0, NULL, 0}
};
/* Parse a single option. */
static error_t parse_opt (int key, char *arg, struct argp_state *state) {
/* Get the input argument from argp_parse, which we
* know is a pointer to our arguments structure. */
ssh_bind sshbind = state->input;
static int no_default_keys = 0;
static int rsa_already_set = 0, dsa_already_set = 0, ecdsa_already_set = 0;
switch (key) {
case 'n':
no_default_keys = 1;
break;
case 'p':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDPORT_STR, arg);
break;
case 'd':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_DSAKEY, arg);
dsa_already_set = 1;
break;
case 'k':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY, arg);
/* We can't track the types of keys being added with this
option, so let's ensure we keep the keys we're adding
by just not setting the default keys */
no_default_keys = 1;
break;
case 'r':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_RSAKEY, arg);
rsa_already_set = 1;
break;
case 'e':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_ECDSAKEY, arg);
ecdsa_already_set = 1;
break;
case 'v':
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_LOG_VERBOSITY_STR,
"3");
break;
case ARGP_KEY_ARG:
if (state->arg_num >= 1) {
/* Too many arguments. */
argp_usage (state);
}
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDADDR, arg);
break;
case ARGP_KEY_END:
if (state->arg_num < 1) {
/* Not enough arguments. */
argp_usage (state);
}
if (!no_default_keys) {
set_default_keys(sshbind,
rsa_already_set,
dsa_already_set,
ecdsa_already_set);
}
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
/* Our argp parser. */
static struct argp argp = {options, parse_opt, args_doc, doc, NULL, NULL, NULL};
#endif /* HAVE_ARGP_H */
/* A userdata struct for channel. */
struct channel_data_struct {
/* pid of the child process the channel will spawn. */
pid_t pid;
/* For PTY allocation */
socket_t pty_master;
socket_t pty_slave;
/* For communication with the child process. */
socket_t stdin;
socket_t stdout;
/* Only used for subsystem and exec requests. */
socket_t stderr;
/* Event which is used to poll the above descriptors. */
ssh_event event;
/* Terminal size struct. */
struct winsize *winsize;
};
/* A userdata struct for session. */
struct session_data_struct {
/* Pointer to the channel the session will allocate. */
ssh_channel channel;
int auth_attempts;
int authenticated;
};
static int data_function(ssh_session session, ssh_channel channel, void *data,
uint32_t len, int is_stderr, void *userdata) {
struct channel_data_struct *cdata = (struct channel_data_struct *) userdata;
(void) session;
(void) channel;
(void) is_stderr;
if (len == 0 || cdata->pid < 1 || kill(cdata->pid, 0) < 0) {
return 0;
}
return write(cdata->stdin, (char *) data, len);
}
static int pty_request(ssh_session session, ssh_channel channel,
const char *term, int cols, int rows, int py, int px,
void *userdata) {
struct channel_data_struct *cdata = (struct channel_data_struct *)userdata;
(void) session;
(void) channel;
(void) term;
cdata->winsize->ws_row = rows;
cdata->winsize->ws_col = cols;
cdata->winsize->ws_xpixel = px;
cdata->winsize->ws_ypixel = py;
if (openpty(&cdata->pty_master, &cdata->pty_slave, NULL, NULL,
cdata->winsize) != 0) {
fprintf(stderr, "Failed to open pty\n");
return SSH_ERROR;
}
return SSH_OK;
}
static int pty_resize(ssh_session session, ssh_channel channel, int cols,
int rows, int py, int px, void *userdata) {
struct channel_data_struct *cdata = (struct channel_data_struct *)userdata;
(void) session;
(void) channel;
cdata->winsize->ws_row = rows;
cdata->winsize->ws_col = cols;
cdata->winsize->ws_xpixel = px;
cdata->winsize->ws_ypixel = py;
if (cdata->pty_master != -1) {
return ioctl(cdata->pty_master, TIOCSWINSZ, cdata->winsize);
}
return SSH_ERROR;
}
static int exec_pty(const char *mode, const char *command,
struct channel_data_struct *cdata) {
switch(cdata->pid = fork()) {
case -1:
close(cdata->pty_master);
close(cdata->pty_slave);
fprintf(stderr, "Failed to fork\n");
return SSH_ERROR;
case 0:
close(cdata->pty_master);
if (login_tty(cdata->pty_slave) != 0) {
exit(1);
}
execl("/bin/sh", "sh", mode, command, NULL);
exit(0);
default:
close(cdata->pty_slave);
/* pty fd is bi-directional */
cdata->stdout = cdata->stdin = cdata->pty_master;
}
return SSH_OK;
}
static int exec_nopty(const char *command, struct channel_data_struct *cdata) {
int in[2], out[2], err[2];
/* Do the plumbing to be able to talk with the child process. */
if (pipe(in) != 0) {
goto stdin_failed;
}
if (pipe(out) != 0) {
goto stdout_failed;
}
if (pipe(err) != 0) {
goto stderr_failed;
}
switch(cdata->pid = fork()) {
case -1:
goto fork_failed;
case 0:
/* Finish the plumbing in the child process. */
close(in[1]);
close(out[0]);
close(err[0]);
dup2(in[0], STDIN_FILENO);
dup2(out[1], STDOUT_FILENO);
dup2(err[1], STDERR_FILENO);
close(in[0]);
close(out[1]);
close(err[1]);
/* exec the requested command. */
execl("/bin/sh", "sh", "-c", command, NULL);
exit(0);
}
close(in[0]);
close(out[1]);
close(err[1]);
cdata->stdin = in[1];
cdata->stdout = out[0];
cdata->stderr = err[0];
return SSH_OK;
fork_failed:
close(err[0]);
close(err[1]);
stderr_failed:
close(out[0]);
close(out[1]);
stdout_failed:
close(in[0]);
close(in[1]);
stdin_failed:
return SSH_ERROR;
}
static int exec_request(ssh_session session, ssh_channel channel,
const char *command, void *userdata) {
struct channel_data_struct *cdata = (struct channel_data_struct *) userdata;
(void) session;
(void) channel;
if(cdata->pid > 0) {
return SSH_ERROR;
}
if (cdata->pty_master != -1 && cdata->pty_slave != -1) {
return exec_pty("-c", command, cdata);
}
return exec_nopty(command, cdata);
}
static int shell_request(ssh_session session, ssh_channel channel,
void *userdata) {
struct channel_data_struct *cdata = (struct channel_data_struct *) userdata;
(void) session;
(void) channel;
if(cdata->pid > 0) {
return SSH_ERROR;
}
if (cdata->pty_master != -1 && cdata->pty_slave != -1) {
return exec_pty("-l", NULL, cdata);
}
/* Client requested a shell without a pty, let's pretend we allow that */
return SSH_OK;
}
static int subsystem_request(ssh_session session, ssh_channel channel,
const char *subsystem, void *userdata) {
/* subsystem requests behave simillarly to exec requests. */
if (strcmp(subsystem, "sftp") == 0) {
return exec_request(session, channel, SFTP_SERVER_PATH, userdata);
}
return SSH_ERROR;
}
static int auth_password(ssh_session session, const char *user,
const char *pass, void *userdata) {
struct session_data_struct *sdata = (struct session_data_struct *) userdata;
(void) session;
if (strcmp(user, USER) == 0 && strcmp(pass, PASS) == 0) {
sdata->authenticated = 1;
return SSH_AUTH_SUCCESS;
}
sdata->auth_attempts++;
return SSH_AUTH_DENIED;
}
static ssh_channel channel_open(ssh_session session, void *userdata) {
struct session_data_struct *sdata = (struct session_data_struct *) userdata;
sdata->channel = ssh_channel_new(session);
return sdata->channel;
}
static int process_stdout(socket_t fd, int revents, void *userdata) {
char buf[BUF_SIZE];
int n = -1;
ssh_channel channel = (ssh_channel) userdata;
if (channel != NULL && (revents & POLLIN) != 0) {
n = read(fd, buf, BUF_SIZE);
if (n > 0) {
ssh_channel_write(channel, buf, n);
}
}
return n;
}
static int process_stderr(socket_t fd, int revents, void *userdata) {
char buf[BUF_SIZE];
int n = -1;
ssh_channel channel = (ssh_channel) userdata;
if (channel != NULL && (revents & POLLIN) != 0) {
n = read(fd, buf, BUF_SIZE);
if (n > 0) {
ssh_channel_write_stderr(channel, buf, n);
}
}
return n;
}
static void handle_session(ssh_event event, ssh_session session) {
int n, rc;
/* Structure for storing the pty size. */
struct winsize wsize = {
.ws_row = 0,
.ws_col = 0,
.ws_xpixel = 0,
.ws_ypixel = 0
};
/* Our struct holding information about the channel. */
struct channel_data_struct cdata = {
.pid = 0,
.pty_master = -1,
.pty_slave = -1,
.stdin = -1,
.stdout = -1,
.stderr = -1,
.event = NULL,
.winsize = &wsize
};
/* Our struct holding information about the session. */
struct session_data_struct sdata = {
.channel = NULL,
.auth_attempts = 0,
.authenticated = 0
};
struct ssh_channel_callbacks_struct channel_cb = {
.userdata = &cdata,
.channel_pty_request_function = pty_request,
.channel_pty_window_change_function = pty_resize,
.channel_shell_request_function = shell_request,
.channel_exec_request_function = exec_request,
.channel_data_function = data_function,
.channel_subsystem_request_function = subsystem_request
};
struct ssh_server_callbacks_struct server_cb = {
.userdata = &sdata,
.auth_password_function = auth_password,
.channel_open_request_session_function = channel_open,
};
ssh_callbacks_init(&server_cb);
ssh_callbacks_init(&channel_cb);
ssh_set_server_callbacks(session, &server_cb);
if (ssh_handle_key_exchange(session) != SSH_OK) {
fprintf(stderr, "%s\n", ssh_get_error(session));
return;
}
ssh_set_auth_methods(session, SSH_AUTH_METHOD_PASSWORD);
ssh_event_add_session(event, session);
n = 0;
while (sdata.authenticated == 0 || sdata.channel == NULL) {
/* If the user has used up all attempts, or if he hasn't been able to
* authenticate in 10 seconds (n * 100ms), disconnect. */
if (sdata.auth_attempts >= 3 || n >= 100) {
return;
}
if (ssh_event_dopoll(event, 100) == SSH_ERROR) {
fprintf(stderr, "%s\n", ssh_get_error(session));
return;
}
n++;
}
ssh_set_channel_callbacks(sdata.channel, &channel_cb);
do {
/* Poll the main event which takes care of the session, the channel and
* even our child process's stdout/stderr (once it's started). */
if (ssh_event_dopoll(event, -1) == SSH_ERROR) {
ssh_channel_close(sdata.channel);
}
/* If child process's stdout/stderr has been registered with the event,
* or the child process hasn't started yet, continue. */
if (cdata.event != NULL || cdata.pid == 0) {
continue;
}
/* Executed only once, once the child process starts. */
cdata.event = event;
/* If stdout valid, add stdout to be monitored by the poll event. */
if (cdata.stdout != -1) {
if (ssh_event_add_fd(event, cdata.stdout, POLLIN, process_stdout,
sdata.channel) != SSH_OK) {
fprintf(stderr, "Failed to register stdout to poll context\n");
ssh_channel_close(sdata.channel);
}
}
/* If stderr valid, add stderr to be monitored by the poll event. */
if (cdata.stderr != -1){
if (ssh_event_add_fd(event, cdata.stderr, POLLIN, process_stderr,
sdata.channel) != SSH_OK) {
fprintf(stderr, "Failed to register stderr to poll context\n");
ssh_channel_close(sdata.channel);
}
}
} while(ssh_channel_is_open(sdata.channel) &&
(cdata.pid == 0 || waitpid(cdata.pid, &rc, WNOHANG) == 0));
close(cdata.pty_master);
close(cdata.stdin);
close(cdata.stdout);
close(cdata.stderr);
/* Remove the descriptors from the polling context, since they are now
* closed, they will always trigger during the poll calls. */
ssh_event_remove_fd(event, cdata.stdout);
ssh_event_remove_fd(event, cdata.stderr);
/* If the child process exited. */
if (kill(cdata.pid, 0) < 0 && WIFEXITED(rc)) {
rc = WEXITSTATUS(rc);
ssh_channel_request_send_exit_status(sdata.channel, rc);
/* If client terminated the channel or the process did not exit nicely,
* but only if something has been forked. */
} else if (cdata.pid > 0) {
kill(cdata.pid, SIGKILL);
}
ssh_channel_send_eof(sdata.channel);
ssh_channel_close(sdata.channel);
/* Wait up to 5 seconds for the client to terminate the session. */
for (n = 0; n < 50 && (ssh_get_status(session) & SESSION_END) == 0; n++) {
ssh_event_dopoll(event, 100);
}
}
/* SIGCHLD handler for cleaning up dead children. */
static void sigchld_handler(int signo) {
(void) signo;
while (waitpid(-1, NULL, WNOHANG) > 0);
}
int main(int argc, char **argv) {
ssh_bind sshbind;
ssh_session session;
ssh_event event;
struct sigaction sa;
/* Set up SIGCHLD handler. */
sa.sa_handler = sigchld_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
if (sigaction(SIGCHLD, &sa, NULL) != 0) {
fprintf(stderr, "Failed to register SIGCHLD handler\n");
return 1;
}
ssh_init();
sshbind = ssh_bind_new();
#ifdef HAVE_ARGP_H
argp_parse(&argp, argc, argv, 0, 0, sshbind);
#else
(void) argc;
(void) argv;
set_default_keys(sshbind, 0, 0, 0);
#endif /* HAVE_ARGP_H */
if(ssh_bind_listen(sshbind) < 0) {
fprintf(stderr, "%s\n", ssh_get_error(sshbind));
return 1;
}
while (1) {
session = ssh_new();
if (session == NULL) {
fprintf(stderr, "Failed to allocate session\n");
continue;
}
/* Blocks until there is a new incoming connection. */
if(ssh_bind_accept(sshbind, session) != SSH_ERROR) {
switch(fork()) {
case 0:
/* Remove the SIGCHLD handler inherited from parent. */
sa.sa_handler = SIG_DFL;
sigaction(SIGCHLD, &sa, NULL);
/* Remove socket binding, which allows us to restart the
* parent process, without terminating existing sessions. */
ssh_bind_free(sshbind);
event = ssh_event_new();
if (event != NULL) {
/* Blocks until the SSH session ends by either
* child process exiting, or client disconnecting. */
handle_session(event, session);
ssh_event_free(event);
} else {
fprintf(stderr, "Could not create polling context\n");
}
ssh_disconnect(session);
ssh_free(session);
exit(0);
case -1:
fprintf(stderr, "Failed to fork\n");
}
} else {
fprintf(stderr, "%s\n", ssh_get_error(sshbind));
}
/* Since the session has been passed to a child fork, do some cleaning
* up at the parent process. */
ssh_disconnect(session);
ssh_free(session);
}
ssh_bind_free(sshbind);
ssh_finalize();
return 0;
}

45
libssh/examples/sshnetcat.c
View File

@ -87,13 +87,23 @@ static void select_loop(ssh_session session,ssh_channel channel){
int ret;
while(channel){
do{
int fd;
FD_ZERO(&fds);
if(!eof)
FD_SET(0,&fds);
timeout.tv_sec=30;
timeout.tv_usec=0;
FD_SET(ssh_get_fd(session),&fds);
maxfd=ssh_get_fd(session)+1;
fd = ssh_get_fd(session);
if (fd == -1) {
fprintf(stderr, "Error getting the session file descriptor: %s\n",
ssh_get_error(session));
return;
}
FD_SET(fd, &fds);
maxfd = fd + 1;
channels[0]=channel; // set the first channel we want to read from
channels[1]=NULL;
ret=ssh_select(channels,outchannels,maxfd,&fds,&timeout);
@ -102,27 +112,27 @@ static void select_loop(ssh_session session,ssh_channel channel){
if(FD_ISSET(0,&fds)){
lus=read(0,buffer,sizeof(buffer));
if(lus)
channel_write(channel,buffer,lus);
ssh_channel_write(channel,buffer,lus);
else {
eof=1;
channel_send_eof(channel);
ssh_channel_send_eof(channel);
}
}
if(channel && channel_is_closed(channel)){
channel_free(channel);
if(channel && ssh_channel_is_closed(channel)){
ssh_channel_free(channel);
channel=NULL;
channels[0]=NULL;
}
if(outchannels[0]){
while(channel && channel_is_open(channel) && channel_poll(channel,0)){
lus=channel_read(channel,buffer,sizeof(buffer),0);
while(channel && ssh_channel_is_open(channel) && ssh_channel_poll(channel,0)){
lus = ssh_channel_read(channel,buffer,sizeof(buffer),0);
if(lus==-1){
fprintf(stderr, "Error reading channel: %s\n",
ssh_get_error(session));
return;
}
if(lus==0){
channel_free(channel);
ssh_channel_free(channel);
channel=channels[0]=NULL;
} else {
ret = write(1, buffer, lus);
@ -133,27 +143,28 @@ static void select_loop(ssh_session session,ssh_channel channel){
}
}
}
while(channel && channel_is_open(channel) && channel_poll(channel,1)){ /* stderr */
lus=channel_read(channel,buffer,sizeof(buffer),1);
while(channel && ssh_channel_is_open(channel) && ssh_channel_poll(channel,1)){ /* stderr */
lus = ssh_channel_read(channel, buffer, sizeof(buffer), 1);
if(lus==-1){
fprintf(stderr, "Error reading channel: %s\n",
ssh_get_error(session));
return;
}
if(lus==0){
channel_free(channel);
ssh_channel_free(channel);
channel=channels[0]=NULL;
} else
} else {
ret = write(2, buffer, lus);
if (ret < 0) {
fprintf(stderr, "Error writing to stderr: %s",
strerror(errno));
return;
}
}
}
}
if(channel && channel_is_closed(channel)){
channel_free(channel);
if(channel && ssh_channel_is_closed(channel)){
ssh_channel_free(channel);
channel=NULL;
}
} while (ret==EINTR || ret==SSH_EINTR);
@ -164,8 +175,8 @@ static void select_loop(ssh_session session,ssh_channel channel){
static void forwarding(ssh_session session){
ssh_channel channel;
int r;
channel=channel_new(session);
r=channel_open_forward(channel,desthost,atoi(port),"localhost",22);
channel = ssh_channel_new(session);
r = ssh_channel_open_forward(channel, desthost, atoi(port), "localhost", 22);
if(r<0) {
printf("error forwarding port : %s\n",ssh_get_error(session));
return;

32
libssh/include/libssh/bignum.h Normal file
View File

@ -0,0 +1,32 @@
/*
* This file is part of the SSH Library
*
* Copyright (c) 2014 by Aris Adamantiadis <aris@badcode.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef BIGNUM_H_
#define BIGNUM_H_
#include "libssh/libcrypto.h"
#include "libssh/libgcrypt.h"
bignum make_string_bn(ssh_string string);
ssh_string make_bignum_string(bignum num);
void ssh_print_bignum(const char *which,bignum num);
#endif /* BIGNUM_H_ */

17
libssh/include/libssh/buffer.h
View File

@ -21,6 +21,8 @@
#ifndef BUFFER_H_
#define BUFFER_H_
#include <stdarg.h>
#include "libssh/libssh.h"
/*
* Describes a buffer state
@ -34,21 +36,32 @@ struct ssh_buffer_struct {
uint32_t used;
uint32_t allocated;
uint32_t pos;
int secure;
};
#define SSH_BUFFER_PACK_END ((uint32_t) 0x4f65feb3)
LIBSSH_API void ssh_buffer_free(ssh_buffer buffer);
LIBSSH_API void *ssh_buffer_get_begin(ssh_buffer buffer);
LIBSSH_API uint32_t ssh_buffer_get_len(ssh_buffer buffer);
LIBSSH_API ssh_buffer ssh_buffer_new(void);
void ssh_buffer_set_secure(ssh_buffer buffer);
int buffer_add_ssh_string(ssh_buffer buffer, ssh_string string);
int buffer_add_u8(ssh_buffer buffer, uint8_t data);
int buffer_add_u16(ssh_buffer buffer, uint16_t data);
int buffer_add_u32(ssh_buffer buffer, uint32_t data);
int buffer_add_u64(ssh_buffer buffer, uint64_t data);
int buffer_add_data(ssh_buffer buffer, const void *data, uint32_t len);
int ssh_buffer_add_data(ssh_buffer buffer, const void *data, uint32_t len);
int ssh_buffer_pack_va(struct ssh_buffer_struct *buffer, const char *format, va_list ap);
int _ssh_buffer_pack(struct ssh_buffer_struct *buffer, const char *format, ...);
#define ssh_buffer_pack(buffer, format, ...) _ssh_buffer_pack((buffer),(format), __VA_ARGS__, SSH_BUFFER_PACK_END)
int ssh_buffer_unpack_va(struct ssh_buffer_struct *buffer, const char *format, va_list ap);
int _ssh_buffer_unpack(struct ssh_buffer_struct *buffer, const char *format, ...);
#define ssh_buffer_unpack(buffer, format, ...) _ssh_buffer_unpack((buffer),(format), __VA_ARGS__, SSH_BUFFER_PACK_END)
int buffer_prepend_data(ssh_buffer buffer, const void *data, uint32_t len);
int buffer_add_buffer(ssh_buffer buffer, ssh_buffer source);
int buffer_reinit(ssh_buffer buffer);
int ssh_buffer_reinit(ssh_buffer buffer);
/* buffer_get_rest returns a pointer to the current position into the buffer */
void *buffer_get_rest(ssh_buffer buffer);

4
libssh/include/libssh/callbacks.h
View File

@ -495,6 +495,8 @@ LIBSSH_API int ssh_set_callbacks(ssh_session session, ssh_callbacks cb);
* @param len the length of the data
* @param is_stderr is 0 for stdout or 1 for stderr
* @param userdata Userdata to be passed to the callback function.
* @returns number of bytes processed by the callee. The remaining bytes will
* be sent in the next callback message, when more data is available.
*/
typedef int (*ssh_channel_data_callback) (ssh_session session,
ssh_channel channel,
@ -801,6 +803,8 @@ struct ssh_threads_callbacks_struct {
*
* @see ssh_threads_callbacks_struct
* @see SSH_THREADS_PTHREAD
* @bug libgcrypt 1.6 and bigger backend does not support custom callback.
* Using anything else than pthreads here will fail.
*/
LIBSSH_API int ssh_threads_set_callbacks(struct ssh_threads_callbacks_struct
*cb);

2
libssh/include/libssh/channels.h
View File

@ -75,6 +75,8 @@ struct ssh_channel_struct {
int exit_status;
enum ssh_channel_request_state_e request_state;
ssh_channel_callbacks callbacks;
/* counters */
ssh_counter counter;
};
SSH_PACKET_CALLBACK(ssh_packet_channel_open_conf);

10
libssh/include/libssh/crypto.h
View File

@ -46,6 +46,8 @@
#include "libssh/kex.h"
#include "libssh/curve25519.h"
#define DIGEST_MAX_LEN 64
enum ssh_key_exchange_e {
/* diffie-hellman-group1-sha1 */
SSH_KEX_DH_GROUP1_SHA1=1,
@ -79,8 +81,10 @@ struct ssh_crypto_struct {
unsigned char *encryptkey;
unsigned char *encryptMAC;
unsigned char *decryptMAC;
unsigned char hmacbuf[EVP_MAX_MD_SIZE];
unsigned char hmacbuf[DIGEST_MAX_LEN];
struct ssh_cipher_struct *in_cipher, *out_cipher; /* the cipher structures/objects */
enum ssh_hmac_e in_hmac, out_hmac; /* the MAC algorithms used */
ssh_string server_pubkey;
const char *server_pubkey_type;
int do_compress_out; /* idem */
@ -111,9 +115,9 @@ struct ssh_cipher_struct {
/* sets the new key for immediate use */
int (*set_encrypt_key)(struct ssh_cipher_struct *cipher, void *key, void *IV);
int (*set_decrypt_key)(struct ssh_cipher_struct *cipher, void *key, void *IV);
void (*cbc_encrypt)(struct ssh_cipher_struct *cipher, void *in, void *out,
void (*encrypt)(struct ssh_cipher_struct *cipher, void *in, void *out,
unsigned long len);
void (*cbc_decrypt)(struct ssh_cipher_struct *cipher, void *in, void *out,
void (*decrypt)(struct ssh_cipher_struct *cipher, void *in, void *out,
unsigned long len);
};

5
libssh/include/libssh/curve25519.h
View File

@ -39,7 +39,10 @@ int crypto_scalarmult_base(unsigned char *q, const unsigned char *n);
int crypto_scalarmult(unsigned char *q, const unsigned char *n, const unsigned char *p);
#endif /* WITH_NACL */
#define HAVE_CURVE25519
#ifdef HAVE_ECC
#define HAVE_CURVE25519 1
#endif
typedef unsigned char ssh_curve25519_pubkey[CURVE25519_PUBKEY_SIZE];
typedef unsigned char ssh_curve25519_privkey[CURVE25519_PRIVKEY_SIZE];

4
libssh/include/libssh/dh.h
View File

@ -25,7 +25,6 @@
#include "libssh/crypto.h"
void ssh_print_bignum(const char *which,bignum num);
int dh_generate_e(ssh_session session);
int dh_generate_f(ssh_session session);
int dh_generate_x(ssh_session session);
@ -48,8 +47,5 @@ int make_sessionid(ssh_session session);
int hashbufin_add_cookie(ssh_session session, unsigned char *cookie);
int hashbufout_add_cookie(ssh_session session);
int generate_session_keys(ssh_session session);
bignum make_string_bn(ssh_string string);
ssh_string make_bignum_string(bignum num);
#endif /* DH_H_ */

4
libssh/include/libssh/ecdh.h
View File

@ -26,7 +26,9 @@
#ifdef HAVE_LIBCRYPTO
#ifdef HAVE_OPENSSL_ECDH_H
#define HAVE_ECDH
#ifdef HAVE_ECC
#define HAVE_ECDH 1
#endif
#endif /* HAVE_OPENSSL_ECDH_H */
#endif /* HAVE_LIBCRYPTO */

79
libssh/include/libssh/ed25519.h Normal file
View File

@ -0,0 +1,79 @@
/*
* This file is part of the SSH Library
*
* Copyright (c) 2014 by Aris Adamantiadis
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef ED25519_H_
#define ED25519_H_
#include "libssh/priv.h"
/**
* @defgroup ed25519 ed25519 API
* @internal
* @brief API for DJB's ed25519
*
* @{ */
#define ED25519_PK_LEN 32
#define ED25519_SK_LEN 64
#define ED25519_SIG_LEN 64
typedef uint8_t ed25519_pubkey[ED25519_PK_LEN];
typedef uint8_t ed25519_privkey[ED25519_SK_LEN];
typedef uint8_t ed25519_signature[ED25519_SIG_LEN];
/** @internal
* @brief generate an ed25519 key pair
* @param[out] pk generated public key
* @param[out] sk generated secret key
* @return 0 on success, -1 on error.
* */
int crypto_sign_ed25519_keypair(ed25519_pubkey pk, ed25519_privkey sk);
/** @internal
* @brief sign a message with ed25519
* @param[out] sm location to store the signed message.
* Its length should be mlen + 64.
* @param[out] smlen pointer to the size of the signed message
* @param[in] m message to be signed
* @param[in] mlen length of the message to be signed
* @param[in] sk secret key to sign the message with
* @return 0 on success.
*/
int crypto_sign_ed25519(
unsigned char *sm,unsigned long long *smlen,
const unsigned char *m,unsigned long long mlen,
const ed25519_privkey sk);
/** @internal
* @brief "open" and verify the signature of a signed message
* @param[out] m location to store the verified message.
* Its length should be equal to smlen.
* @param[out] mlen pointer to the size of the verified message
* @param[in] sm signed message to verify
* @param[in] smlen length of the signed message to verify
* @param[in] pk public key used to sign the message
* @returns 0 on success (supposedly).
*/
int crypto_sign_ed25519_open(
unsigned char *m,unsigned long long *mlen,
const unsigned char *sm,unsigned long long smlen,
const ed25519_pubkey pk);
/** @} */
#endif /* ED25519_H_ */

68
libssh/include/libssh/fe25519.h Normal file
View File

@ -0,0 +1,68 @@
/* $OpenBSD: fe25519.h,v 1.3 2013/12/09 11:03:45 markus Exp $ */
/*
* Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange,
* Peter Schwabe, Bo-Yin Yang.
* Copied from supercop-20130419/crypto_sign/ed25519/ref/fe25519.h
*/
#ifndef FE25519_H
#define FE25519_H
#include "libssh/priv.h"
#define fe25519 crypto_sign_ed25519_ref_fe25519
#define fe25519_freeze crypto_sign_ed25519_ref_fe25519_freeze
#define fe25519_unpack crypto_sign_ed25519_ref_fe25519_unpack
#define fe25519_pack crypto_sign_ed25519_ref_fe25519_pack
#define fe25519_iszero crypto_sign_ed25519_ref_fe25519_iszero
#define fe25519_iseq_vartime crypto_sign_ed25519_ref_fe25519_iseq_vartime
#define fe25519_cmov crypto_sign_ed25519_ref_fe25519_cmov
#define fe25519_setone crypto_sign_ed25519_ref_fe25519_setone
#define fe25519_setzero crypto_sign_ed25519_ref_fe25519_setzero
#define fe25519_neg crypto_sign_ed25519_ref_fe25519_neg
#define fe25519_getparity crypto_sign_ed25519_ref_fe25519_getparity
#define fe25519_add crypto_sign_ed25519_ref_fe25519_add
#define fe25519_sub crypto_sign_ed25519_ref_fe25519_sub
#define fe25519_mul crypto_sign_ed25519_ref_fe25519_mul
#define fe25519_square crypto_sign_ed25519_ref_fe25519_square
#define fe25519_invert crypto_sign_ed25519_ref_fe25519_invert
#define fe25519_pow2523 crypto_sign_ed25519_ref_fe25519_pow2523
typedef struct {
uint32_t v[32];
} fe25519;
void fe25519_freeze(fe25519 *r);
void fe25519_unpack(fe25519 *r, const unsigned char x[32]);
void fe25519_pack(unsigned char r[32], const fe25519 *x);
int fe25519_iszero(const fe25519 *x);
int fe25519_iseq_vartime(const fe25519 *x, const fe25519 *y);
void fe25519_cmov(fe25519 *r, const fe25519 *x, unsigned char b);
void fe25519_setone(fe25519 *r);
void fe25519_setzero(fe25519 *r);
void fe25519_neg(fe25519 *r, const fe25519 *x);
unsigned char fe25519_getparity(const fe25519 *x);
void fe25519_add(fe25519 *r, const fe25519 *x, const fe25519 *y);
void fe25519_sub(fe25519 *r, const fe25519 *x, const fe25519 *y);
void fe25519_mul(fe25519 *r, const fe25519 *x, const fe25519 *y);
void fe25519_square(fe25519 *r, const fe25519 *x);
void fe25519_invert(fe25519 *r, const fe25519 *x);
void fe25519_pow2523(fe25519 *r, const fe25519 *x);
#endif

43
libssh/include/libssh/ge25519.h Normal file
View File

@ -0,0 +1,43 @@
/* $OpenBSD: ge25519.h,v 1.3 2013/12/09 11:03:45 markus Exp $ */
/*
* Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange,
* Peter Schwabe, Bo-Yin Yang.
* Copied from supercop-20130419/crypto_sign/ed25519/ref/ge25519.h
*/
#ifndef GE25519_H
#define GE25519_H
#include "fe25519.h"
#include "sc25519.h"
#define ge25519 crypto_sign_ed25519_ref_ge25519
#define ge25519_base crypto_sign_ed25519_ref_ge25519_base
#define ge25519_unpackneg_vartime crypto_sign_ed25519_ref_unpackneg_vartime
#define ge25519_pack crypto_sign_ed25519_ref_pack
#define ge25519_isneutral_vartime crypto_sign_ed25519_ref_isneutral_vartime
#define ge25519_double_scalarmult_vartime crypto_sign_ed25519_ref_double_scalarmult_vartime
#define ge25519_scalarmult_base crypto_sign_ed25519_ref_scalarmult_base
typedef struct
{
fe25519 x;
fe25519 y;
fe25519 z;
fe25519 t;
} ge25519;
const ge25519 ge25519_base;
int ge25519_unpackneg_vartime(ge25519 *r, const unsigned char p[32]);
void ge25519_pack(unsigned char r[32], const ge25519 *p);
int ge25519_isneutral_vartime(const ge25519 *p);
void ge25519_double_scalarmult_vartime(ge25519 *r, const ge25519 *p1, const sc25519 *s1, const ge25519 *p2, const sc25519 *s2);
void ge25519_scalarmult_base(ge25519 *r, const sc25519 *s);
#endif

27
libssh/include/libssh/knownhosts.h Normal file
View File

@ -0,0 +1,27 @@
/*
* This file is part of the SSH Library
*
* Copyright (c) 20014 by Aris Adamantiadis <aris@badcode.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef KNOWNHOSTS_H_
#define KNOWNHOSTS_H_
char **ssh_knownhosts_algorithms(ssh_session session);
#endif /* KNOWNHOSTS_H_ */

90
libssh/include/libssh/legacy.h
View File

@ -42,51 +42,51 @@ LIBSSH_API int ssh_userauth_autopubkey(ssh_session session, const char *passphra
LIBSSH_API int ssh_userauth_privatekey_file(ssh_session session, const char *username,
const char *filename, const char *passphrase);
LIBSSH_API void buffer_free(ssh_buffer buffer);
LIBSSH_API void *buffer_get(ssh_buffer buffer);
LIBSSH_API uint32_t buffer_get_len(ssh_buffer buffer);
LIBSSH_API ssh_buffer buffer_new(void);
SSH_DEPRECATED LIBSSH_API void buffer_free(ssh_buffer buffer);
SSH_DEPRECATED LIBSSH_API void *buffer_get(ssh_buffer buffer);
SSH_DEPRECATED LIBSSH_API uint32_t buffer_get_len(ssh_buffer buffer);
SSH_DEPRECATED LIBSSH_API ssh_buffer buffer_new(void);
LIBSSH_API ssh_channel channel_accept_x11(ssh_channel channel, int timeout_ms);
LIBSSH_API int channel_change_pty_size(ssh_channel channel,int cols,int rows);
LIBSSH_API ssh_channel channel_forward_accept(ssh_session session, int timeout_ms);
LIBSSH_API int channel_close(ssh_channel channel);
LIBSSH_API int channel_forward_cancel(ssh_session session, const char *address, int port);
LIBSSH_API int channel_forward_listen(ssh_session session, const char *address, int port, int *bound_port);
LIBSSH_API void channel_free(ssh_channel channel);
LIBSSH_API int channel_get_exit_status(ssh_channel channel);
LIBSSH_API ssh_session channel_get_session(ssh_channel channel);
LIBSSH_API int channel_is_closed(ssh_channel channel);
LIBSSH_API int channel_is_eof(ssh_channel channel);
LIBSSH_API int channel_is_open(ssh_channel channel);
LIBSSH_API ssh_channel channel_new(ssh_session session);
LIBSSH_API int channel_open_forward(ssh_channel channel, const char *remotehost,
SSH_DEPRECATED LIBSSH_API ssh_channel channel_accept_x11(ssh_channel channel, int timeout_ms);
SSH_DEPRECATED LIBSSH_API int channel_change_pty_size(ssh_channel channel,int cols,int rows);
SSH_DEPRECATED LIBSSH_API ssh_channel channel_forward_accept(ssh_session session, int timeout_ms);
SSH_DEPRECATED LIBSSH_API int channel_close(ssh_channel channel);
SSH_DEPRECATED LIBSSH_API int channel_forward_cancel(ssh_session session, const char *address, int port);
SSH_DEPRECATED LIBSSH_API int channel_forward_listen(ssh_session session, const char *address, int port, int *bound_port);
SSH_DEPRECATED LIBSSH_API void channel_free(ssh_channel channel);
SSH_DEPRECATED LIBSSH_API int channel_get_exit_status(ssh_channel channel);
SSH_DEPRECATED LIBSSH_API ssh_session channel_get_session(ssh_channel channel);
SSH_DEPRECATED LIBSSH_API int channel_is_closed(ssh_channel channel);
SSH_DEPRECATED LIBSSH_API int channel_is_eof(ssh_channel channel);
SSH_DEPRECATED LIBSSH_API int channel_is_open(ssh_channel channel);
SSH_DEPRECATED LIBSSH_API ssh_channel channel_new(ssh_session session);
SSH_DEPRECATED LIBSSH_API int channel_open_forward(ssh_channel channel, const char *remotehost,
int remoteport, const char *sourcehost, int localport);
LIBSSH_API int channel_open_session(ssh_channel channel);
LIBSSH_API int channel_poll(ssh_channel channel, int is_stderr);
LIBSSH_API int channel_read(ssh_channel channel, void *dest, uint32_t count, int is_stderr);
SSH_DEPRECATED LIBSSH_API int channel_open_session(ssh_channel channel);
SSH_DEPRECATED LIBSSH_API int channel_poll(ssh_channel channel, int is_stderr);
SSH_DEPRECATED LIBSSH_API int channel_read(ssh_channel channel, void *dest, uint32_t count, int is_stderr);
LIBSSH_API int channel_read_buffer(ssh_channel channel, ssh_buffer buffer, uint32_t count,
SSH_DEPRECATED LIBSSH_API int channel_read_buffer(ssh_channel channel, ssh_buffer buffer, uint32_t count,
int is_stderr);
LIBSSH_API int channel_read_nonblocking(ssh_channel channel, void *dest, uint32_t count,
SSH_DEPRECATED LIBSSH_API int channel_read_nonblocking(ssh_channel channel, void *dest, uint32_t count,
int is_stderr);
LIBSSH_API int channel_request_env(ssh_channel channel, const char *name, const char *value);
LIBSSH_API int channel_request_exec(ssh_channel channel, const char *cmd);
LIBSSH_API int channel_request_pty(ssh_channel channel);
LIBSSH_API int channel_request_pty_size(ssh_channel channel, const char *term,
SSH_DEPRECATED LIBSSH_API int channel_request_env(ssh_channel channel, const char *name, const char *value);
SSH_DEPRECATED LIBSSH_API int channel_request_exec(ssh_channel channel, const char *cmd);
SSH_DEPRECATED LIBSSH_API int channel_request_pty(ssh_channel channel);
SSH_DEPRECATED LIBSSH_API int channel_request_pty_size(ssh_channel channel, const char *term,
int cols, int rows);
LIBSSH_API int channel_request_shell(ssh_channel channel);
LIBSSH_API int channel_request_send_signal(ssh_channel channel, const char *signum);
LIBSSH_API int channel_request_sftp(ssh_channel channel);
LIBSSH_API int channel_request_subsystem(ssh_channel channel, const char *subsystem);
LIBSSH_API int channel_request_x11(ssh_channel channel, int single_connection, const char *protocol,
SSH_DEPRECATED LIBSSH_API int channel_request_shell(ssh_channel channel);
SSH_DEPRECATED LIBSSH_API int channel_request_send_signal(ssh_channel channel, const char *signum);
SSH_DEPRECATED LIBSSH_API int channel_request_sftp(ssh_channel channel);
SSH_DEPRECATED LIBSSH_API int channel_request_subsystem(ssh_channel channel, const char *subsystem);
SSH_DEPRECATED LIBSSH_API int channel_request_x11(ssh_channel channel, int single_connection, const char *protocol,
const char *cookie, int screen_number);
LIBSSH_API int channel_send_eof(ssh_channel channel);
LIBSSH_API int channel_select(ssh_channel *readchans, ssh_channel *writechans, ssh_channel *exceptchans, struct
SSH_DEPRECATED LIBSSH_API int channel_send_eof(ssh_channel channel);
SSH_DEPRECATED LIBSSH_API int channel_select(ssh_channel *readchans, ssh_channel *writechans, ssh_channel *exceptchans, struct
timeval * timeout);
LIBSSH_API void channel_set_blocking(ssh_channel channel, int blocking);
LIBSSH_API int channel_write(ssh_channel channel, const void *data, uint32_t len);
SSH_DEPRECATED LIBSSH_API void channel_set_blocking(ssh_channel channel, int blocking);
SSH_DEPRECATED LIBSSH_API int channel_write(ssh_channel channel, const void *data, uint32_t len);
LIBSSH_API void privatekey_free(ssh_private_key prv);
LIBSSH_API ssh_private_key privatekey_from_file(ssh_session session, const char *filename,
@ -107,14 +107,14 @@ LIBSSH_API ssh_string ssh_get_pubkey(ssh_session session);
LIBSSH_API ssh_message ssh_message_retrieve(ssh_session session, uint32_t packettype);
LIBSSH_API ssh_public_key ssh_message_auth_publickey(ssh_message msg);
LIBSSH_API void string_burn(ssh_string str);
LIBSSH_API ssh_string string_copy(ssh_string str);
LIBSSH_API void *string_data(ssh_string str);
LIBSSH_API int string_fill(ssh_string str, const void *data, size_t len);
LIBSSH_API void string_free(ssh_string str);
LIBSSH_API ssh_string string_from_char(const char *what);
LIBSSH_API size_t string_len(ssh_string str);
LIBSSH_API ssh_string string_new(size_t size);
LIBSSH_API char *string_to_char(ssh_string str);
SSH_DEPRECATED LIBSSH_API void string_burn(ssh_string str);
SSH_DEPRECATED LIBSSH_API ssh_string string_copy(ssh_string str);
SSH_DEPRECATED LIBSSH_API void *string_data(ssh_string str);
SSH_DEPRECATED LIBSSH_API int string_fill(ssh_string str, const void *data, size_t len);
SSH_DEPRECATED LIBSSH_API void string_free(ssh_string str);
SSH_DEPRECATED LIBSSH_API ssh_string string_from_char(const char *what);
SSH_DEPRECATED LIBSSH_API size_t string_len(ssh_string str);
SSH_DEPRECATED LIBSSH_API ssh_string string_new(size_t size);
SSH_DEPRECATED LIBSSH_API char *string_to_char(ssh_string str);
#endif /* LEGACY_H_ */

13
libssh/include/libssh/libcrypto.h
View File

@ -36,6 +36,8 @@
typedef SHA_CTX* SHACTX;
typedef SHA256_CTX* SHA256CTX;
typedef SHA512_CTX* SHA384CTX;
typedef SHA512_CTX* SHA512CTX;
typedef MD5_CTX* MD5CTX;
typedef HMAC_CTX* HMACCTX;
#ifdef HAVE_ECC
@ -45,6 +47,9 @@ typedef void *EVPCTX;
#endif
#define SHA_DIGEST_LEN SHA_DIGEST_LENGTH
#define SHA256_DIGEST_LEN SHA256_DIGEST_LENGTH
#define SHA384_DIGEST_LEN SHA384_DIGEST_LENGTH
#define SHA512_DIGEST_LEN SHA512_DIGEST_LENGTH
#ifdef MD5_DIGEST_LEN
#undef MD5_DIGEST_LEN
#endif
@ -84,6 +89,14 @@ SHA256CTX sha256_init(void);
void sha256_update(SHA256CTX c, const void *data, unsigned long len);
void sha256_final(unsigned char *md, SHA256CTX c);
SHA384CTX sha384_init(void);
void sha384_update(SHA384CTX c, const void *data, unsigned long len);
void sha384_final(unsigned char *md, SHA384CTX c);
SHA512CTX sha512_init(void);
void sha512_update(SHA512CTX c, const void *data, unsigned long len);
void sha512_final(unsigned char *md, SHA512CTX c);
struct ssh_cipher_struct *ssh_get_ciphertab(void);
#endif /* HAVE_LIBCRYPTO */

8
libssh/include/libssh/libgcrypt.h
View File

@ -27,6 +27,9 @@
#include <gcrypt.h>
typedef gcry_md_hd_t SHACTX;
typedef gcry_md_hd_t SHA256CTX;
typedef gcry_md_hd_t SHA384CTX;
typedef gcry_md_hd_t SHA512CTX;
typedef gcry_md_hd_t MD5CTX;
typedef gcry_md_hd_t HMACCTX;
typedef void *EVPCTX;
@ -34,11 +37,14 @@ typedef void *EVPCTX;
#define SHA_DIGEST_LEN SHA_DIGEST_LENGTH
#define MD5_DIGEST_LEN 16
#define SHA256_DIGEST_LENGTH 32
#define SHA256_DIGEST_LEN SHA256_DIGEST_LENGTH
#define SHA384_DIGEST_LENGTH 48
#define SHA384_DIGEST_LEN SHA384_DIGEST_LENGTH
#define SHA512_DIGEST_LENGTH 64
#define SHA512_DIGEST_LEN SHA512_DIGEST_LENGTH
#ifndef EVP_MAX_MD_SIZE
#define EVP_MAX_MD_SIZE 36
#define EVP_MAX_MD_SIZE 64
#endif
#define EVP_DIGEST_LEN EVP_MAX_MD_SIZE

56
libssh/include/libssh/libssh.h
View File

@ -104,6 +104,13 @@
extern "C" {
#endif
struct ssh_counter_struct {
uint64_t in_bytes;
uint64_t out_bytes;
uint64_t in_packets;
uint64_t out_packets;
};
typedef struct ssh_counter_struct *ssh_counter;
typedef struct ssh_agent_struct* ssh_agent;
typedef struct ssh_buffer_struct* ssh_buffer;
@ -245,7 +252,8 @@ enum ssh_keytypes_e{
SSH_KEYTYPE_DSS=1,
SSH_KEYTYPE_RSA,
SSH_KEYTYPE_RSA1,
SSH_KEYTYPE_ECDSA
SSH_KEYTYPE_ECDSA,
SSH_KEYTYPE_ED25519
};
enum ssh_keycmp_e {
@ -331,7 +339,12 @@ enum ssh_options_e {
SSH_OPTIONS_COMPRESSION,
SSH_OPTIONS_COMPRESSION_LEVEL,
SSH_OPTIONS_KEY_EXCHANGE,
SSH_OPTIONS_HOSTKEYS
SSH_OPTIONS_HOSTKEYS,
SSH_OPTIONS_GSSAPI_SERVER_IDENTITY,
SSH_OPTIONS_GSSAPI_CLIENT_IDENTITY,
SSH_OPTIONS_GSSAPI_DELEGATE_CREDENTIALS,
SSH_OPTIONS_HMAC_C_S,
SSH_OPTIONS_HMAC_S_C,
};
enum {
@ -374,6 +387,7 @@ LIBSSH_API int ssh_channel_open_x11(ssh_channel channel, const char *orig_addr,
LIBSSH_API int ssh_channel_poll(ssh_channel channel, int is_stderr);
LIBSSH_API int ssh_channel_poll_timeout(ssh_channel channel, int timeout, int is_stderr);
LIBSSH_API int ssh_channel_read(ssh_channel channel, void *dest, uint32_t count, int is_stderr);
LIBSSH_API int ssh_channel_read_timeout(ssh_channel channel, void *dest, uint32_t count, int is_stderr, int timeout_ms);
LIBSSH_API int ssh_channel_read_nonblocking(ssh_channel channel, void *dest, uint32_t count,
int is_stderr);
LIBSSH_API int ssh_channel_request_env(ssh_channel channel, const char *name, const char *value);
@ -391,6 +405,8 @@ LIBSSH_API int ssh_channel_send_eof(ssh_channel channel);
LIBSSH_API int ssh_channel_select(ssh_channel *readchans, ssh_channel *writechans, ssh_channel *exceptchans, struct
timeval * timeout);
LIBSSH_API void ssh_channel_set_blocking(ssh_channel channel, int blocking);
LIBSSH_API void ssh_channel_set_counter(ssh_channel channel,
ssh_counter counter);
LIBSSH_API int ssh_channel_write(ssh_channel channel, const void *data, uint32_t len);
LIBSSH_API uint32_t ssh_channel_window_size(ssh_channel channel);
@ -401,9 +417,19 @@ LIBSSH_API const char *ssh_copyright(void);
LIBSSH_API void ssh_disconnect(ssh_session session);
LIBSSH_API char *ssh_dirname (const char *path);
LIBSSH_API int ssh_finalize(void);
LIBSSH_API ssh_channel ssh_forward_accept(ssh_session session, int timeout_ms);
LIBSSH_API int ssh_forward_cancel(ssh_session session, const char *address, int port);
LIBSSH_API int ssh_forward_listen(ssh_session session, const char *address, int port, int *bound_port);
/* REVERSE PORT FORWARDING */
LIBSSH_API ssh_channel ssh_channel_accept_forward(ssh_session session,
int timeout_ms,
int *destination_port);
LIBSSH_API int ssh_channel_cancel_forward(ssh_session session,
const char *address,
int port);
LIBSSH_API int ssh_channel_listen_forward(ssh_session session,
const char *address,
int port,
int *bound_port);
LIBSSH_API void ssh_free(ssh_session session);
LIBSSH_API const char *ssh_get_disconnect_message(ssh_session session);
LIBSSH_API const char *ssh_get_error(void *error);
@ -424,11 +450,17 @@ LIBSSH_API int ssh_get_publickey_hash(const ssh_key key,
unsigned char **hash,
size_t *hlen);
/* DEPRECATED FUNCTIONS */
SSH_DEPRECATED LIBSSH_API int ssh_get_pubkey_hash(ssh_session session, unsigned char **hash);
SSH_DEPRECATED LIBSSH_API ssh_channel ssh_forward_accept(ssh_session session, int timeout_ms);
SSH_DEPRECATED LIBSSH_API int ssh_forward_cancel(ssh_session session, const char *address, int port);
SSH_DEPRECATED LIBSSH_API int ssh_forward_listen(ssh_session session, const char *address, int port, int *bound_port);
LIBSSH_API int ssh_get_random(void *where,int len,int strong);
LIBSSH_API int ssh_get_version(ssh_session session);
LIBSSH_API int ssh_get_status(ssh_session session);
LIBSSH_API int ssh_get_poll_flags(ssh_session session);
LIBSSH_API int ssh_init(void);
LIBSSH_API int ssh_is_blocking(ssh_session session);
LIBSSH_API int ssh_is_connected(ssh_session session);
@ -509,6 +541,11 @@ LIBSSH_API int ssh_pki_import_privkey_file(const char *filename,
ssh_auth_callback auth_fn,
void *auth_data,
ssh_key *pkey);
LIBSSH_API int ssh_pki_export_privkey_file(const ssh_key privkey,
const char *passphrase,
ssh_auth_callback auth_fn,
void *auth_data,
const char *filename);
LIBSSH_API int ssh_pki_import_pubkey_base64(const char *b64_key,
enum ssh_keytypes_e type,
@ -523,6 +560,8 @@ LIBSSH_API int ssh_pki_export_pubkey_base64(const ssh_key key,
LIBSSH_API int ssh_pki_export_pubkey_file(const ssh_key key,
const char *filename);
LIBSSH_API const char *ssh_pki_key_ecdsa_name(const ssh_key key);
LIBSSH_API void ssh_print_hexa(const char *descr, const unsigned char *what, size_t len);
LIBSSH_API int ssh_send_ignore (ssh_session session, const char *data);
LIBSSH_API int ssh_send_debug (ssh_session session, const char *message, int always_display);
@ -550,6 +589,8 @@ LIBSSH_API int ssh_select(ssh_channel *channels, ssh_channel *outchannels, socke
LIBSSH_API int ssh_service_request(ssh_session session, const char *service);
LIBSSH_API int ssh_set_agent_channel(ssh_session session, ssh_channel channel);
LIBSSH_API void ssh_set_blocking(ssh_session session, int blocking);
LIBSSH_API void ssh_set_counters(ssh_session session, ssh_counter scounter,
ssh_counter rcounter);
LIBSSH_API void ssh_set_fd_except(ssh_session session);
LIBSSH_API void ssh_set_fd_toread(ssh_session session);
LIBSSH_API void ssh_set_fd_towrite(ssh_session session);
@ -615,7 +656,12 @@ LIBSSH_API int ssh_event_dopoll(ssh_event event, int timeout);
LIBSSH_API int ssh_event_remove_fd(ssh_event event, socket_t fd);
LIBSSH_API int ssh_event_remove_session(ssh_event event, ssh_session session);
LIBSSH_API void ssh_event_free(ssh_event event);
LIBSSH_API const char* ssh_get_clientbanner(ssh_session session);
LIBSSH_API const char* ssh_get_serverbanner(ssh_session session);
LIBSSH_API const char* ssh_get_cipher_in(ssh_session session);
LIBSSH_API const char* ssh_get_cipher_out(ssh_session session);
LIBSSH_API const char* ssh_get_hmac_in(ssh_session session);
LIBSSH_API const char* ssh_get_hmac_out(ssh_session session);
#ifndef LIBSSH_LEGACY_0_4
#include "libssh/legacy.h"

38
libssh/include/libssh/libsshpp.hpp
View File

@ -56,6 +56,7 @@
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string>
namespace ssh {
@ -361,18 +362,18 @@ public:
* @see ssh_channel_forward_accept
* @see Session::listenForward
*/
Channel *acceptForward(int timeout_ms);
/* acceptForward is implemented later in this file */
inline Channel *acceptForward(int timeout_ms);
/* implemented outside the class due Channel references */
void_throwable cancelForward(const char *address, int port){
int err=ssh_forward_cancel(c_session, address, port);
int err=ssh_channel_cancel_forward(c_session, address, port);
ssh_throw(err);
return_throwable;
}
void_throwable listenForward(const char *address, int port,
int &boundport){
int err=ssh_forward_listen(c_session, address, port, &boundport);
int err=ssh_channel_listen_forward(c_session, address, port, &boundport);
ssh_throw(err);
return_throwable;
}
@ -480,12 +481,30 @@ public:
ssh_throw(err);
return err;
}
int read(void *dest, size_t count, bool is_stderr=false){
int read(void *dest, size_t count, bool is_stderr){
int err;
/* handle int overflow */
if(count > 0x7fffffff)
count = 0x7fffffff;
err=ssh_channel_read(channel,dest,count,is_stderr);
err=ssh_channel_read_timeout(channel,dest,count,is_stderr,-1);
ssh_throw(err);
return err;
}
int read(void *dest, size_t count, int timeout){
int err;
/* handle int overflow */
if(count > 0x7fffffff)
count = 0x7fffffff;
err=ssh_channel_read_timeout(channel,dest,count,false,timeout);
ssh_throw(err);
return err;
}
int read(void *dest, size_t count, bool is_stderr=false, int timeout=-1){
int err;
/* handle int overflow */
if(count > 0x7fffffff)
count = 0x7fffffff;
err=ssh_channel_read_timeout(channel,dest,count,is_stderr,timeout);
ssh_throw(err);
return err;
}
@ -581,10 +600,9 @@ private:
};
/* This code cannot be put inline due to references to Channel */
Channel *Session::acceptForward(int timeout_ms){
ssh_channel forward = ssh_forward_accept(c_session,
timeout_ms);
inline Channel *Session::acceptForward(int timeout_ms){
ssh_channel forward =
ssh_channel_accept_forward(c_session, timeout_ms, NULL);
ssh_throw_null(c_session,forward);
Channel *newchan = new Channel(*this,forward);
return newchan;

4
libssh/include/libssh/packet.h
View File

@ -21,6 +21,8 @@
#ifndef PACKET_H_
#define PACKET_H_
#include "libssh/wrapper.h"
struct ssh_socket_struct;
/* this structure should go someday */
@ -82,6 +84,6 @@ unsigned char *packet_encrypt(ssh_session session,
void *packet,
unsigned int len);
int packet_hmac_verify(ssh_session session,ssh_buffer buffer,
unsigned char *mac);
unsigned char *mac, enum ssh_hmac_e type);
#endif /* PACKET_H_ */

5
libssh/include/libssh/pki.h
View File

@ -21,6 +21,7 @@
#ifndef PKI_H_
#define PKI_H_
#include "libssh/priv.h"
#ifdef HAVE_OPENSSL_EC_H
#include <openssl/ec.h>
#endif
@ -29,6 +30,7 @@
#endif
#include "libssh/crypto.h"
#include "libssh/ed25519.h"
#define MAX_PUBKEY_SIZE 0x100000 /* 1M */
#define MAX_PRIVKEY_SIZE 0x400000 /* 4M */
@ -55,6 +57,8 @@ struct ssh_key_struct {
void *ecdsa;
#endif /* HAVE_OPENSSL_EC_H */
#endif
ed25519_pubkey *ed25519_pubkey;
ed25519_privkey *ed25519_privkey;
void *cert;
};
@ -74,6 +78,7 @@ struct ssh_signature_struct {
void *ecdsa_sig;
# endif
#endif
ed25519_signature *ed25519_sig;
};
typedef struct ssh_signature_struct *ssh_signature;

20
libssh/include/libssh/pki_priv.h
View File

@ -34,12 +34,15 @@ void _ssh_pki_log(const char *function,
const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
int pki_key_ecdsa_nid_from_name(const char *name);
const char *pki_key_ecdsa_nid_to_name(int nid);
/* SSH Key Functions */
ssh_key pki_key_dup(const ssh_key key, int demote);
int pki_key_generate_rsa(ssh_key key, int parameter);
int pki_key_generate_dss(ssh_key key, int parameter);
int pki_key_generate_ecdsa(ssh_key key, int parameter);
int pki_key_generate_ed25519(ssh_key key);
int pki_key_compare(const ssh_key k1,
const ssh_key k2,
enum ssh_keycmp_e what);
@ -51,6 +54,11 @@ ssh_key pki_private_key_from_base64(const char *b64_key,
ssh_auth_callback auth_fn,
void *auth_data);
ssh_string pki_private_key_to_pem(const ssh_key key,
const char *passphrase,
ssh_auth_callback auth_fn,
void *auth_data);
/* SSH Public Key Functions */
int pki_pubkey_build_dss(ssh_key key,
ssh_string p,
@ -85,4 +93,16 @@ ssh_signature pki_do_sign(const ssh_key privkey,
ssh_signature pki_do_sign_sessionid(const ssh_key key,
const unsigned char *hash,
size_t hlen);
int pki_ed25519_sign(const ssh_key privkey, ssh_signature sig,
const unsigned char *hash, size_t hlen);
int pki_ed25519_verify(const ssh_key pubkey, ssh_signature sig,
const unsigned char *hash, size_t hlen);
int pki_ed25519_key_cmp(const ssh_key k1,
const ssh_key k2,
enum ssh_keycmp_e what);
int pki_ed25519_key_dup(ssh_key new, const ssh_key key);
int pki_ed25519_public_key_to_blob(ssh_buffer buffer, ssh_key key);
ssh_string pki_ed25519_sig_to_blob(ssh_signature sig);
int pki_ed25519_sig_from_blob(ssh_signature sig, ssh_string sig_blob);
#endif /* PKI_PRIV_H_ */

25
libssh/include/libssh/priv.h
View File

@ -120,11 +120,24 @@ int gettimeofday(struct timeval *__p, void *__t);
#include "libssh/callbacks.h"
/* some constants */
#ifndef MAX_PACKAT_LEN
#define MAX_PACKET_LEN 262144
#endif
#ifndef ERROR_BUFFERLEN
#define ERROR_BUFFERLEN 1024
#endif
#ifndef CLIENTBANNER1
#define CLIENTBANNER1 "SSH-1.5-libssh-" SSH_STRINGIFY(LIBSSH_VERSION)
#endif
#ifndef CLIENTBANNER2
#define CLIENTBANNER2 "SSH-2.0-libssh-" SSH_STRINGIFY(LIBSSH_VERSION)
#endif
#ifndef KBDINT_MAX_PROMPT
#define KBDINT_MAX_PROMPT 256 /* more than openssh's :) */
#endif
#ifndef MAX_BUF_SIZE
#define MAX_BUF_SIZE 4096
#endif
#ifndef __FUNCTION__
#if defined(__SUNPRO_C)
@ -155,16 +168,6 @@ int gettimeofday(struct timeval *__p, void *__t);
#include <sys/time.h>
#endif
/*
* get rid of deprecacy warnings on OSX when using OpenSSL
*/
#if defined(__APPLE__)
#ifdef MAC_OS_X_VERSION_MIN_REQUIRED
#undef MAC_OS_X_VERSION_MIN_REQUIRED
#endif
#define MAC_OS_X_VERSION_MIN_REQUIRED MAC_OS_X_VERSION_10_6
#endif
/* forward declarations */
struct ssh_common_struct;
struct ssh_kex_struct;
@ -275,7 +278,7 @@ int match_hostname(const char *host, const char *pattern, unsigned int len);
/** Overwrite the buffer with '\0' */
# define BURN_BUFFER(x, size) do { \
if ((x) != NULL) \
memset((x), '\0', (size)); __asm__ volatile("" : : "r"(&(x)) : "memory"); \
memset((x), '\0', (size)); \
} while(0)
#endif /* HAVE_GCC_VOLATILE_MEMORY_PROTECTION */

74
libssh/include/libssh/sc25519.h Normal file
View File

@ -0,0 +1,74 @@
/* $OpenBSD: sc25519.h,v 1.3 2013/12/09 11:03:45 markus Exp $ */
/*
* Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange,
* Peter Schwabe, Bo-Yin Yang.
* Copied from supercop-20130419/crypto_sign/ed25519/ref/sc25519.h
*/
#ifndef SC25519_H
#define SC25519_H
#define sc25519 crypto_sign_ed25519_ref_sc25519
#define shortsc25519 crypto_sign_ed25519_ref_shortsc25519
#define sc25519_from32bytes crypto_sign_ed25519_ref_sc25519_from32bytes
#define shortsc25519_from16bytes crypto_sign_ed25519_ref_shortsc25519_from16bytes
#define sc25519_from64bytes crypto_sign_ed25519_ref_sc25519_from64bytes
#define sc25519_from_shortsc crypto_sign_ed25519_ref_sc25519_from_shortsc
#define sc25519_to32bytes crypto_sign_ed25519_ref_sc25519_to32bytes
#define sc25519_iszero_vartime crypto_sign_ed25519_ref_sc25519_iszero_vartime
#define sc25519_isshort_vartime crypto_sign_ed25519_ref_sc25519_isshort_vartime
#define sc25519_lt_vartime crypto_sign_ed25519_ref_sc25519_lt_vartime
#define sc25519_add crypto_sign_ed25519_ref_sc25519_add
#define sc25519_sub_nored crypto_sign_ed25519_ref_sc25519_sub_nored
#define sc25519_mul crypto_sign_ed25519_ref_sc25519_mul
#define sc25519_mul_shortsc crypto_sign_ed25519_ref_sc25519_mul_shortsc
#define sc25519_window3 crypto_sign_ed25519_ref_sc25519_window3
#define sc25519_window5 crypto_sign_ed25519_ref_sc25519_window5
#define sc25519_2interleave2 crypto_sign_ed25519_ref_sc25519_2interleave2
typedef struct {
uint32_t v[32];
} sc25519;
typedef struct {
uint32_t v[16];
} shortsc25519;
void sc25519_from32bytes(sc25519 *r, const unsigned char x[32]);
void shortsc25519_from16bytes(shortsc25519 *r, const unsigned char x[16]);
void sc25519_from64bytes(sc25519 *r, const unsigned char x[64]);
void sc25519_from_shortsc(sc25519 *r, const shortsc25519 *x);
void sc25519_to32bytes(unsigned char r[32], const sc25519 *x);
int sc25519_iszero_vartime(const sc25519 *x);
int sc25519_isshort_vartime(const sc25519 *x);
int sc25519_lt_vartime(const sc25519 *x, const sc25519 *y);
void sc25519_add(sc25519 *r, const sc25519 *x, const sc25519 *y);
void sc25519_sub_nored(sc25519 *r, const sc25519 *x, const sc25519 *y);
void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y);
void sc25519_mul_shortsc(sc25519 *r, const sc25519 *x, const shortsc25519 *y);
/* Convert s into a representation of the form \sum_{i=0}^{84}r[i]2^3
* with r[i] in {-4,...,3}
*/
void sc25519_window3(signed char r[85], const sc25519 *s);
/* Convert s into a representation of the form \sum_{i=0}^{50}r[i]2^5
* with r[i] in {-16,...,15}
*/
void sc25519_window5(signed char r[51], const sc25519 *s);
void sc25519_2interleave2(unsigned char r[127], const sc25519 *s1, const sc25519 *s2);
#endif

66
libssh/include/libssh/server.h
View File

@ -44,7 +44,8 @@ enum ssh_bind_options_e {
SSH_BIND_OPTIONS_RSAKEY,
SSH_BIND_OPTIONS_BANNER,
SSH_BIND_OPTIONS_LOG_VERBOSITY,
SSH_BIND_OPTIONS_LOG_VERBOSITY_STR
SSH_BIND_OPTIONS_LOG_VERBOSITY_STR,
SSH_BIND_OPTIONS_ECDSAKEY
};
typedef struct ssh_bind_struct* ssh_bind;
@ -80,69 +81,6 @@ typedef struct ssh_bind_callbacks_struct *ssh_bind_callbacks;
*/
LIBSSH_API ssh_bind ssh_bind_new(void);
/**
* @brief Set the options for the current SSH server bind.
*
* @param sshbind The ssh server bind to configure.
*
* @param type The option type to set. This could be one of the
* following:
*
* - SSH_BIND_OPTIONS_BINDADDR
* The ip address to bind (const char *).
*
* - SSH_BIND_OPTIONS_BINDPORT
* The port to bind (unsigned int).
*
* - SSH_BIND_OPTIONS_BINDPORT_STR
* The port to bind (const char *).
*
* - SSH_BIND_OPTIONS_HOSTKEY
* This specifies the file containing the private host key used
* by SSHv1. (const char *).
*
* - SSH_BIND_OPTIONS_DSAKEY
* This specifies the file containing the private host dsa key
* used by SSHv2. (const char *).
*
* - SSH_BIND_OPTIONS_RSAKEY
* This specifies the file containing the private host dsa key
* used by SSHv2. (const char *).
*
* - SSH_BIND_OPTIONS_BANNER
* That the server banner (version string) for SSH.
* (const char *).
*
* - SSH_BIND_OPTIONS_LOG_VERBOSITY
* Set the session logging verbosity (int).\n
* \n
* The verbosity of the messages. Every log smaller or
* equal to verbosity will be shown.
* - SSH_LOG_NOLOG: No logging
* - SSH_LOG_RARE: Rare conditions or warnings
* - SSH_LOG_ENTRY: API-accessible entrypoints
* - SSH_LOG_PACKET: Packet id and size
* - SSH_LOG_FUNCTIONS: Function entering and leaving
*
* - SSH_BIND_OPTIONS_LOG_VERBOSITY_STR
* Set the session logging verbosity (const char *).\n
* \n
* The verbosity of the messages. Every log smaller or
* equal to verbosity will be shown.
* - SSH_LOG_NOLOG: No logging
* - SSH_LOG_RARE: Rare conditions or warnings
* - SSH_LOG_ENTRY: API-accessible entrypoints
* - SSH_LOG_PACKET: Packet id and size
* - SSH_LOG_FUNCTIONS: Function entering and leaving
* \n
* See the corresponding numbers in libssh.h.
*
* @param value The value to set. This is a generic pointer and the
* datatype which is used should be set according to the
* type set.
*
* @returns SSH_OK on success, SSH_ERROR on invalid option or parameter.
*/
LIBSSH_API int ssh_bind_options_set(ssh_bind sshbind,
enum ssh_bind_options_e type, const void *value);

16
libssh/include/libssh/session.h
View File

@ -127,6 +127,15 @@ struct ssh_session_struct {
struct ssh_agent_state_struct *agent_state;
struct ssh_auth_auto_state_struct *auth_auto_state;
/*
* RFC 4253, 7.1: if the first_kex_packet_follows flag was set in
* the received SSH_MSG_KEXINIT, but the guess was wrong, this
* field will be set such that the following guessed packet will
* be ignored. Once that packet has been received and ignored,
* this field is cleared.
*/
int first_kex_follows_guess_wrong;
ssh_buffer in_hashbuf;
ssh_buffer out_hashbuf;
struct ssh_crypto_struct *current_crypto;
@ -175,6 +184,7 @@ struct ssh_session_struct {
char *knownhosts;
char *wanted_methods[10];
char *ProxyCommand;
char *custombanner;
unsigned long timeout; /* seconds */
unsigned long timeout_usec;
unsigned int port;
@ -183,7 +193,13 @@ struct ssh_session_struct {
int ssh2;
int ssh1;
char compressionlevel;
char *gss_server_identity;
char *gss_client_identity;
int gss_delegate_creds;
} opts;
/* counters */
ssh_counter socket_counter;
ssh_counter raw_counter;
};
/** @internal

8
libssh/include/libssh/sftp.h
View File

@ -143,10 +143,10 @@ struct sftp_request_queue_struct {
/* SSH_FXP_MESSAGE described into .7 page 26 */
struct sftp_status_message_struct {
uint32_t id;
uint32_t status;
ssh_string error;
ssh_string lang;
uint32_t id;
uint32_t status;
ssh_string error_unused; /* not used anymore */
ssh_string lang_unused; /* not used anymore */
char *errormsg;
char *langmsg;
};

1
libssh/include/libssh/socket.h
View File

@ -52,6 +52,7 @@ void ssh_socket_set_write_wontblock(ssh_socket s);
void ssh_socket_set_read_wontblock(ssh_socket s);
void ssh_socket_set_except(ssh_socket s);
int ssh_socket_get_status(ssh_socket s);
int ssh_socket_get_poll_flags(ssh_socket s);
int ssh_socket_buffered_write_bytes(ssh_socket s);
int ssh_socket_data_available(ssh_socket s);
int ssh_socket_data_writable(ssh_socket s);

29
libssh/include/libssh/wrapper.h
View File

@ -22,6 +22,7 @@
#define WRAPPER_H_
#include "config.h"
#include "libssh/libssh.h"
#include "libssh/libcrypto.h"
#include "libssh/libgcrypt.h"
@ -34,6 +35,9 @@ enum ssh_mac_e {
enum ssh_hmac_e {
SSH_HMAC_SHA1 = 1,
SSH_HMAC_SHA256,
SSH_HMAC_SHA384,
SSH_HMAC_SHA512,
SSH_HMAC_MD5
};
@ -42,16 +46,36 @@ enum ssh_des_e {
SSH_DES
};
struct ssh_hmac_struct {
const char* name;
enum ssh_hmac_e hmac_type;
};
typedef struct ssh_mac_ctx_struct *ssh_mac_ctx;
MD5CTX md5_init(void);
void md5_update(MD5CTX c, const void *data, unsigned long len);
void md5_final(unsigned char *md,MD5CTX c);
SHACTX sha1_init(void);
void sha1_update(SHACTX c, const void *data, unsigned long len);
void sha1_final(unsigned char *md,SHACTX c);
void sha1(unsigned char *digest,int len,unsigned char *hash);
SHA256CTX sha256_init(void);
void sha256_update(SHA256CTX c, const void *data, unsigned long len);
void sha256_final(unsigned char *md,SHA256CTX c);
void sha256(unsigned char *digest, int len, unsigned char *hash);
SHA384CTX sha384_init(void);
void sha384_update(SHA384CTX c, const void *data, unsigned long len);
void sha384_final(unsigned char *md,SHA384CTX c);
void sha384(unsigned char *digest, int len, unsigned char *hash);
SHA512CTX sha512_init(void);
void sha512_update(SHA512CTX c, const void *data, unsigned long len);
void sha512_final(unsigned char *md,SHA512CTX c);
void sha512(unsigned char *digest, int len, unsigned char *hash);
void evp(int nid, unsigned char *digest, int len, unsigned char *hash, unsigned int *hlen);
EVPCTX evp_init(int nid);
void evp_update(EVPCTX ctx, const void *data, unsigned long len);
@ -64,11 +88,16 @@ void ssh_mac_final(unsigned char *md, ssh_mac_ctx ctx);
HMACCTX hmac_init(const void *key,int len, enum ssh_hmac_e type);
void hmac_update(HMACCTX c, const void *data, unsigned long len);
void hmac_final(HMACCTX ctx,unsigned char *hashmacbuf,unsigned int *len);
size_t hmac_digest_len(enum ssh_hmac_e type);
int crypt_set_algorithms(ssh_session session, enum ssh_des_e des_type);
int crypt_set_algorithms_server(ssh_session session);
struct ssh_crypto_struct *crypto_new(void);
void crypto_free(struct ssh_crypto_struct *crypto);
void ssh_reseed(void);
struct ssh_hmac_struct *ssh_get_hmactab(void);
const char *ssh_hmac_type_to_string(enum ssh_hmac_e hmac_type);
#endif /* WRAPPER_H_ */

6
libssh/libssh-config.cmake.in
View File

@ -7,5 +7,7 @@ else()
set(LIBSSH_INCLUDE_DIR @INCLUDE_INSTALL_DIR@)
endif()
set(LIBSSH_LIRBARY @LIB_INSTALL_DIR@/libssh.so)
set(LIBSSH_LIRBARIES @LIB_INSTALL_DIR@/libssh.so)
set(LIBSSH_LIBRARY @LIB_INSTALL_DIR@/@LIBSSH_LIBRARY_NAME@)
set(LIBSSH_LIBRARIES @LIB_INSTALL_DIR@/@LIBSSH_LIBRARY_NAME@)
set(LIBSSH_THREADS_LIBRARY @LIB_INSTALL_DIR@/@LIBSSH_THREADS_LIBRARY_NAME@)

2
libssh/build/build_make.sh → libssh/obj/build_make.sh
View File

@ -4,7 +4,7 @@
#
# Script to build libssh on UNIX.
#
# Copyright (c) 2006-2007 Andreas Schneider <mail@cynapses.org>
# Copyright (c) 2006-2007 Andreas Schneider <asn@cryptomilk.org>
#
SOURCE_DIR=".."

16
libssh/src/CMakeLists.txt
View File

@ -28,7 +28,7 @@ if (HAVE_LIBSOCKET)
)
endif (HAVE_LIBSOCKET)
if (OPENSSL_LIBRARIES)
if (OPENSSL_CRYPTO_LIBRARIES)
set(LIBSSH_PRIVATE_INCLUDE_DIRS
${LIBSSH_PRIVATE_INCLUDE_DIRS}
${OPENSSL_INCLUDE_DIRS}
@ -36,9 +36,9 @@ if (OPENSSL_LIBRARIES)
set(LIBSSH_LINK_LIBRARIES
${LIBSSH_LINK_LIBRARIES}
${OPENSSL_LIBRARIES}
${OPENSSL_CRYPTO_LIBRARIES}
)
endif (OPENSSL_LIBRARIES)
endif (OPENSSL_CRYPTO_LIBRARIES)
if (GCRYPT_LIBRARY)
set(LIBSSH_PRIVATE_INCLUDE_DIRS
@ -109,6 +109,7 @@ set(libssh_SRCS
agent.c
auth.c
base64.c
bignum.c
buffer.c
callbacks.c
channels.c
@ -118,7 +119,10 @@ set(libssh_SRCS
curve25519.c
dh.c
ecdh.c
ed25519.c
error.c
fe25519.c
ge25519.c
getpass.c
init.c
kex.c
@ -135,8 +139,10 @@ set(libssh_SRCS
packet_crypt.c
pcap.c
pki.c
pki_ed25519.c
poll.c
session.c
sc25519.c
scp.c
socket.c
string.c
@ -288,6 +294,6 @@ if (WITH_STATIC_LIB)
)
endif (WITH_STATIC_LIB)
if (CMAKE_HAVE_THREADS_LIBRARY)
if (Threads_FOUND)
add_subdirectory(threads)
endif (CMAKE_HAVE_THREADS_LIBRARY)
endif (Threads_FOUND)

8
libssh/src/agent.c
View File

@ -3,7 +3,7 @@
*
* This file is part of the SSH Library
*
* Copyright (c) 2008-2009 by Andreas Schneider <asn@cryptomilk.org>
* Copyright (c) 2008-2013 by Andreas Schneider <asn@cryptomilk.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -300,7 +300,7 @@ static int agent_talk(struct ssh_session_struct *session,
"Error reading response from authentication socket.");
return -1;
}
if (buffer_add_data(reply, payload, n) < 0) {
if (ssh_buffer_add_data(reply, payload, n) < 0) {
SSH_LOG(SSH_LOG_WARN, "Not enough space");
return -1;
}
@ -393,7 +393,7 @@ int ssh_agent_get_ident_count(struct ssh_session_struct *session) {
}
if (session->agent->ident) {
buffer_reinit(session->agent->ident);
ssh_buffer_reinit(session->agent->ident);
}
session->agent->ident = reply;
@ -526,7 +526,7 @@ ssh_string ssh_agent_sign_data(ssh_session session,
ssh_buffer_free(request);
return NULL;
}
if (buffer_add_data(request, buffer_get_rest(data), dlen) < 0) {
if (ssh_buffer_add_data(request, buffer_get_rest(data), dlen) < 0) {
ssh_buffer_free(request);
return NULL;
}

565
libssh/src/auth.c
View File

@ -3,8 +3,8 @@
*
* This file is part of the SSH Library
*
* Copyright (c) 2003-2011 by Aris Adamantiadis <aris@0xbadc0de.be>
* Copyright (c) 2008-2011 Andreas Schneider <asn@cryptomilk.org>
* Copyright (c) 2003-2013 by Aris Adamantiadis <aris@0xbadc0de.be>
* Copyright (c) 2008-2013 Andreas Schneider <asn@cryptomilk.org>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -182,25 +182,19 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_banner){
*/
SSH_PACKET_CALLBACK(ssh_packet_userauth_failure){
char *auth_methods = NULL;
ssh_string auth;
uint8_t partial = 0;
int rc;
(void) type;
(void) user;
auth = buffer_get_ssh_string(packet);
if (auth == NULL || buffer_get_u8(packet, &partial) != 1) {
rc = ssh_buffer_unpack(packet, "sb", &auth_methods, &partial);
if (rc != SSH_OK) {
ssh_set_error(session, SSH_FATAL,
"Invalid SSH_MSG_USERAUTH_FAILURE message");
session->auth_state=SSH_AUTH_STATE_ERROR;
goto end;
}
auth_methods = ssh_string_to_char(auth);
if (auth_methods == NULL) {
ssh_set_error_oom(session);
goto end;
}
if (partial) {
session->auth_state=SSH_AUTH_STATE_PARTIAL;
SSH_LOG(SSH_LOG_INFO,
@ -234,7 +228,6 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_failure){
}
end:
ssh_string_free(auth);
SAFE_FREE(auth_methods);
return SSH_PACKET_USED;
@ -359,7 +352,6 @@ int ssh_userauth_list(ssh_session session, const char *username)
* before you connect to the server.
*/
int ssh_userauth_none(ssh_session session, const char *username) {
ssh_string str;
int rc;
#ifdef WITH_SSH1
@ -387,47 +379,12 @@ int ssh_userauth_none(ssh_session session, const char *username) {
}
/* request */
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_REQUEST);
if (rc < 0) {
goto fail;
}
/* username */
if (username) {
str = ssh_string_from_char(username);
} else {
str = ssh_string_from_char(session->opts.username);
}
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* service */
str = ssh_string_from_char("ssh-connection");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* method */
str = ssh_string_from_char("none");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
rc = ssh_buffer_pack(session->out_buffer, "bsss",
SSH2_MSG_USERAUTH_REQUEST,
username ? username : session->opts.username,
"ssh-connection",
"none"
);
if (rc < 0) {
goto fail;
}
@ -448,7 +405,7 @@ pending:
return rc;
fail:
ssh_set_error_oom(session);
buffer_reinit(session->out_buffer);
ssh_buffer_reinit(session->out_buffer);
return SSH_AUTH_ERROR;
}
@ -485,7 +442,7 @@ int ssh_userauth_try_publickey(ssh_session session,
const char *username,
const ssh_key pubkey)
{
ssh_string str;
ssh_string pubkey_s = NULL;
int rc;
if (session == NULL) {
@ -522,82 +479,28 @@ int ssh_userauth_try_publickey(ssh_session session,
return SSH_AUTH_ERROR;
}
/* request */
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_REQUEST);
if (rc < 0) {
goto fail;
}
/* username */
if (username) {
str = ssh_string_from_char(username);
} else {
str = ssh_string_from_char(session->opts.username);
}
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* service */
str = ssh_string_from_char("ssh-connection");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* method */
str = ssh_string_from_char("publickey");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* private key? */
rc = buffer_add_u8(session->out_buffer, 0);
if (rc < 0) {
goto fail;
}
/* algo */
str = ssh_string_from_char(pubkey->type_c);
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* public key */
rc = ssh_pki_export_pubkey_blob(pubkey, &str);
rc = ssh_pki_export_pubkey_blob(pubkey, &pubkey_s);
if (rc < 0) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
/* request */
rc = ssh_buffer_pack(session->out_buffer, "bsssbsS",
SSH2_MSG_USERAUTH_REQUEST,
username ? username : session->opts.username,
"ssh-connection",
"publickey",
0, /* private key ? */
pubkey->type_c, /* algo */
pubkey_s /* public key */
);
if (rc < 0) {
goto fail;
}
ssh_string_free(pubkey_s);
session->auth_state = SSH_AUTH_STATE_NONE;
session->pending_call_state = SSH_PENDING_CALL_AUTH_OFFER_PUBKEY;
rc = packet_send(session);
@ -613,8 +516,9 @@ pending:
return rc;
fail:
ssh_string_free(pubkey_s);
ssh_set_error_oom(session);
buffer_reinit(session->out_buffer);
ssh_buffer_reinit(session->out_buffer);
return SSH_AUTH_ERROR;
}
@ -647,7 +551,7 @@ int ssh_userauth_publickey(ssh_session session,
const char *username,
const ssh_key privkey)
{
ssh_string str;
ssh_string str = NULL;
int rc;
if (session == NULL) {
@ -684,81 +588,26 @@ int ssh_userauth_publickey(ssh_session session,
return SSH_AUTH_ERROR;
}
/* request */
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_REQUEST);
if (rc < 0) {
goto fail;
}
/* username */
if (username) {
str = ssh_string_from_char(username);
} else {
str = ssh_string_from_char(session->opts.username);
}
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* service */
str = ssh_string_from_char("ssh-connection");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* method */
str = ssh_string_from_char("publickey");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* private key? */
rc = buffer_add_u8(session->out_buffer, 1);
if (rc < 0) {
goto fail;
}
/* algo */
str = ssh_string_from_char(privkey->type_c);
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* public key */
rc = ssh_pki_export_pubkey_blob(privkey, &str);
if (rc < 0) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
/* request */
rc = ssh_buffer_pack(session->out_buffer, "bsssbsS",
SSH2_MSG_USERAUTH_REQUEST,
username ? username : session->opts.username,
"ssh-connection",
"publickey",
1, /* private key */
privkey->type_c, /* algo */
str /* public key */
);
if (rc < 0) {
goto fail;
}
ssh_string_free(str);
/* sign the buffer with the private key */
str = ssh_pki_do_sign(session, session->out_buffer, privkey);
@ -768,6 +617,7 @@ int ssh_userauth_publickey(ssh_session session,
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
str = NULL;
if (rc < 0) {
goto fail;
}
@ -787,8 +637,9 @@ pending:
return rc;
fail:
ssh_string_free(str);
ssh_set_error_oom(session);
buffer_reinit(session->out_buffer);
ssh_buffer_reinit(session->out_buffer);
return SSH_AUTH_ERROR;
}
@ -798,7 +649,7 @@ static int ssh_userauth_agent_publickey(ssh_session session,
const char *username,
ssh_key pubkey)
{
ssh_string str;
ssh_string str = NULL;
int rc;
switch(session->pending_call_state) {
@ -820,69 +671,6 @@ static int ssh_userauth_agent_publickey(ssh_session session,
return SSH_AUTH_ERROR;
}
/* request */
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_REQUEST);
if (rc < 0) {
goto fail;
}
/* username */
if (username) {
str = ssh_string_from_char(username);
} else {
str = ssh_string_from_char(session->opts.username);
}
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* service */
str = ssh_string_from_char("ssh-connection");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* method */
str = ssh_string_from_char("publickey");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* private key? */
rc = buffer_add_u8(session->out_buffer, 1);
if (rc < 0) {
goto fail;
}
/* algo */
str = ssh_string_from_char(pubkey->type_c);
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* public key */
rc = ssh_pki_export_pubkey_blob(pubkey, &str);
@ -890,12 +678,22 @@ static int ssh_userauth_agent_publickey(ssh_session session,
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
/* request */
rc = ssh_buffer_pack(session->out_buffer, "bsssbsS",
SSH2_MSG_USERAUTH_REQUEST,
username ? username : session->opts.username,
"ssh-connection",
"publickey",
1, /* private key */
pubkey->type_c, /* algo */
str /* public key */
);
if (rc < 0) {
goto fail;
}
ssh_string_free(str);
/* sign the buffer with the private key */
str = ssh_pki_do_sign_agent(session, session->out_buffer, pubkey);
if (str == NULL) {
@ -924,7 +722,8 @@ pending:
return rc;
fail:
ssh_set_error_oom(session);
buffer_reinit(session->out_buffer);
ssh_buffer_reinit(session->out_buffer);
ssh_string_free(str);
return SSH_AUTH_ERROR;
}
@ -1306,7 +1105,6 @@ int ssh_userauth_publickey_auto(ssh_session session,
int ssh_userauth_password(ssh_session session,
const char *username,
const char *password) {
ssh_string str;
int rc;
#ifdef WITH_SSH1
@ -1336,65 +1134,14 @@ int ssh_userauth_password(ssh_session session,
}
/* request */
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_REQUEST);
if (rc < 0) {
goto fail;
}
/* username */
if (username) {
str = ssh_string_from_char(username);
} else {
str = ssh_string_from_char(session->opts.username);
}
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* service */
str = ssh_string_from_char("ssh-connection");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* method */
str = ssh_string_from_char("password");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* FALSE */
rc = buffer_add_u8(session->out_buffer, 0);
if (rc < 0) {
goto fail;
}
/* password */
str = ssh_string_from_char(password);
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
rc = ssh_buffer_pack(session->out_buffer, "bsssbs",
SSH2_MSG_USERAUTH_REQUEST,
username ? username : session->opts.username,
"ssh-connection",
"password",
0, /* false */
password
);
if (rc < 0) {
goto fail;
}
@ -1415,7 +1162,7 @@ pending:
return rc;
fail:
ssh_set_error_oom(session);
buffer_reinit(session->out_buffer);
ssh_buffer_reinit(session->out_buffer);
return SSH_AUTH_ERROR;
}
@ -1536,7 +1283,6 @@ static int ssh_userauth_kbdint_init(ssh_session session,
const char *username,
const char *submethods)
{
ssh_string str;
int rc;
if (session->pending_call_state == SSH_PENDING_CALL_AUTH_KBDINT_INIT)
goto pending;
@ -1552,78 +1298,18 @@ static int ssh_userauth_kbdint_init(ssh_session session,
}
/* request */
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_REQUEST);
rc = ssh_buffer_pack(session->out_buffer, "bsssss",
SSH2_MSG_USERAUTH_REQUEST,
username ? username : session->opts.username,
"ssh-connection",
"keyboard-interactive",
"", /* lang (ignore it) */
submethods ? submethods : ""
);
if (rc < 0) {
goto fail;
}
/* username */
if (username) {
str = ssh_string_from_char(username);
} else {
str = ssh_string_from_char(session->opts.username);
}
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* service */
str = ssh_string_from_char("ssh-connection");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* method */
str = ssh_string_from_char("keyboard-interactive");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* lang string (ignore it) */
str = ssh_string_from_char("");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* submethods */
if (submethods == NULL) {
submethods = "";
}
str = ssh_string_from_char(submethods);
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
session->auth_state = SSH_AUTH_STATE_KBDINT_SENT;
session->pending_call_state = SSH_PENDING_CALL_AUTH_KBDINT_INIT;
@ -1642,7 +1328,7 @@ pending:
return rc;
fail:
ssh_set_error_oom(session);
buffer_reinit(session->out_buffer);
ssh_buffer_reinit(session->out_buffer);
return SSH_AUTH_ERROR;
}
@ -1660,7 +1346,6 @@ fail:
*/
static int ssh_userauth_kbdint_send(ssh_session session)
{
ssh_string answer;
uint32_t i;
int rc;
if (session->pending_call_state == SSH_PENDING_CALL_AUTH_KBDINT_SEND)
@ -1669,29 +1354,17 @@ static int ssh_userauth_kbdint_send(ssh_session session)
ssh_set_error_invalid(session);
return SSH_ERROR;
}
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_INFO_RESPONSE);
if (rc < 0) {
goto fail;
}
rc = buffer_add_u32(session->out_buffer, htonl(session->kbdint->nprompts));
rc = ssh_buffer_pack(session->out_buffer, "bd",
SSH2_MSG_USERAUTH_INFO_RESPONSE,
session->kbdint->nprompts);
if (rc < 0) {
goto fail;
}
for (i = 0; i < session->kbdint->nprompts; i++) {
if (session->kbdint->answers && session->kbdint->answers[i]) {
answer = ssh_string_from_char(session->kbdint->answers[i]);
} else {
answer = ssh_string_from_char("");
}
if (answer == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, answer);
string_burn(answer);
string_free(answer);
rc = ssh_buffer_pack(session->out_buffer, "s",
session->kbdint->answers && session->kbdint->answers[i] ?
session->kbdint->answers[i]:"");
if (rc < 0) {
goto fail;
}
@ -1716,7 +1389,7 @@ pending:
return rc;
fail:
ssh_set_error_oom(session);
buffer_reinit(session->out_buffer);
ssh_buffer_reinit(session->out_buffer);
return SSH_AUTH_ERROR;
}
@ -1728,64 +1401,41 @@ fail:
* authentication state.
*/
SSH_PACKET_CALLBACK(ssh_packet_userauth_info_request) {
ssh_string name; /* name of the "asking" window showed to client */
ssh_string instruction;
ssh_string tmp;
ssh_string tmp = NULL;
uint32_t nprompts;
uint32_t i;
int rc;
(void)user;
(void)type;
name = buffer_get_ssh_string(packet);
instruction = buffer_get_ssh_string(packet);
tmp = buffer_get_ssh_string(packet);
buffer_get_u32(packet, &nprompts);
/* We don't care about tmp */
ssh_string_free(tmp);
if (name == NULL || instruction == NULL) {
ssh_string_free(name);
ssh_string_free(instruction);
ssh_set_error(session, SSH_FATAL, "Invalid USERAUTH_INFO_REQUEST msg");
return SSH_PACKET_USED;
}
if (session->kbdint == NULL) {
session->kbdint = ssh_kbdint_new();
if (session->kbdint == NULL) {
ssh_set_error_oom(session);
ssh_string_free(name);
ssh_string_free(instruction);
return SSH_PACKET_USED;
}
} else {
ssh_kbdint_clean(session->kbdint);
}
session->kbdint->name = ssh_string_to_char(name);
ssh_string_free(name);
if (session->kbdint->name == NULL) {
ssh_set_error_oom(session);
ssh_kbdint_free(session->kbdint);
ssh_string_free(instruction);
rc = ssh_buffer_unpack(packet, "ssSd",
&session->kbdint->name, /* name of the "asking" window shown to client */
&session->kbdint->instruction,
&tmp, /* to ignore */
&nprompts
);
return SSH_PACKET_USED;
/* We don't care about tmp */
ssh_string_free(tmp);
if (rc != SSH_OK) {
ssh_set_error(session, SSH_FATAL, "Invalid USERAUTH_INFO_REQUEST msg");
ssh_kbdint_free(session->kbdint);
session->kbdint = NULL;
return SSH_PACKET_USED;
}
session->kbdint->instruction = ssh_string_to_char(instruction);
ssh_string_free(instruction);
if (session->kbdint->instruction == NULL) {
ssh_set_error_oom(session);
ssh_kbdint_free(session->kbdint);
session->kbdint = NULL;
return SSH_PACKET_USED;
}
nprompts = ntohl(nprompts);
SSH_LOG(SSH_LOG_DEBUG,
"%d keyboard-interactive prompts", nprompts);
if (nprompts > KBDINT_MAX_PROMPT) {
@ -1823,23 +1473,14 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_info_request) {
memset(session->kbdint->echo, 0, nprompts);
for (i = 0; i < nprompts; i++) {
tmp = buffer_get_ssh_string(packet);
buffer_get_u8(packet, &session->kbdint->echo[i]);
if (tmp == NULL) {
rc = ssh_buffer_unpack(packet, "sb",
&session->kbdint->prompts[i],
&session->kbdint->echo[i]);
if (rc == SSH_ERROR) {
ssh_set_error(session, SSH_FATAL, "Short INFO_REQUEST packet");
ssh_kbdint_free(session->kbdint);
session->kbdint = NULL;
return SSH_PACKET_USED;
}
session->kbdint->prompts[i] = ssh_string_to_char(tmp);
ssh_string_free(tmp);
if (session->kbdint->prompts[i] == NULL) {
ssh_set_error_oom(session);
session->kbdint->nprompts = i;
ssh_kbdint_free(session->kbdint);
session->kbdint = NULL;
return SSH_PACKET_USED;
}
}

13
libssh/src/base64.c
View File

@ -82,13 +82,18 @@ ssh_buffer base64_to_bin(const char *source) {
SAFE_FREE(base64);
return NULL;
}
/*
* The base64 buffer often contains sensitive data. Make sure we don't leak
* sensitive data
*/
ssh_buffer_set_secure(buffer);
len = strlen(ptr);
while (len > 4) {
if (_base64_to_bin(block, ptr, 3) < 0) {
goto error;
}
if (buffer_add_data(buffer, block, 3) < 0) {
if (ssh_buffer_add_data(buffer, block, 3) < 0) {
goto error;
}
len -= 4;
@ -112,7 +117,7 @@ ssh_buffer base64_to_bin(const char *source) {
if (_base64_to_bin(block, ptr, 3) < 0) {
goto error;
}
if (buffer_add_data(buffer, block, 3) < 0) {
if (ssh_buffer_add_data(buffer, block, 3) < 0) {
goto error;
}
SAFE_FREE(base64);
@ -131,7 +136,7 @@ ssh_buffer base64_to_bin(const char *source) {
if (_base64_to_bin(block, ptr, 1) < 0) {
goto error;
}
if (buffer_add_data(buffer, block, 1) < 0) {
if (ssh_buffer_add_data(buffer, block, 1) < 0) {
goto error;
}
SAFE_FREE(base64);
@ -149,7 +154,7 @@ ssh_buffer base64_to_bin(const char *source) {
if (_base64_to_bin(block, ptr, 2) < 0) {
goto error;
}
if (buffer_add_data(buffer,block,2) < 0) {
if (ssh_buffer_add_data(buffer,block,2) < 0) {
goto error;
}
SAFE_FREE(base64);

96
libssh/src/bignum.c Normal file
View File

@ -0,0 +1,96 @@
/*
* This file is part of the SSH Library
*
* Copyright (c) 2014 by Aris Adamantiadis <aris@badcode.be>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The SSH Library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the SSH Library; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
#include <stdio.h>
#include "libssh/priv.h"
#include "libssh/bignum.h"
#include "libssh/string.h"
ssh_string make_bignum_string(bignum num) {
ssh_string ptr = NULL;
int pad = 0;
unsigned int len = bignum_num_bytes(num);
unsigned int bits = bignum_num_bits(num);
if (len == 0) {
return NULL;
}
/* If the first bit is set we have a negative number */
if (!(bits % 8) && bignum_is_bit_set(num, bits - 1)) {
pad++;
}
#ifdef DEBUG_CRYPTO
fprintf(stderr, "%d bits, %d bytes, %d padding\n", bits, len, pad);
#endif /* DEBUG_CRYPTO */
ptr = ssh_string_new(len + pad);
if (ptr == NULL) {
return NULL;
}
/* We have a negative number so we need a leading zero */
if (pad) {
ptr->data[0] = 0;
}
#ifdef HAVE_LIBGCRYPT
bignum_bn2bin(num, len, ptr->data + pad);
#elif HAVE_LIBCRYPTO
bignum_bn2bin(num, ptr->data + pad);
#endif
return ptr;
}
bignum make_string_bn(ssh_string string){
bignum bn = NULL;
unsigned int len = ssh_string_len(string);
#ifdef DEBUG_CRYPTO
fprintf(stderr, "Importing a %d bits, %d bytes object ...\n",
len * 8, len);
#endif /* DEBUG_CRYPTO */
#ifdef HAVE_LIBGCRYPT
bignum_bin2bn(string->data, len, &bn);
#elif defined HAVE_LIBCRYPTO
bn = bignum_bin2bn(string->data, len, NULL);
#endif
return bn;
}
/* prints the bignum on stderr */
void ssh_print_bignum(const char *which, bignum num) {
#ifdef HAVE_LIBGCRYPT
unsigned char *hex = NULL;
bignum_bn2hex(num, &hex);
#elif defined HAVE_LIBCRYPTO
char *hex = NULL;
hex = bignum_bn2hex(num);
#endif
fprintf(stderr, "%s value: ", which);
fprintf(stderr, "%s\n", (hex == NULL) ? "(null)" : (char *) hex);
SAFE_FREE(hex);
}

77
libssh/src/bind.c
View File

@ -144,26 +144,19 @@ ssh_bind ssh_bind_new(void) {
return ptr;
}
int ssh_bind_listen(ssh_bind sshbind) {
const char *host;
socket_t fd;
static int ssh_bind_import_keys(ssh_bind sshbind) {
int rc;
if (ssh_init() < 0) {
ssh_set_error(sshbind, SSH_FATAL, "ssh_init() failed");
return -1;
}
if (sshbind->ecdsakey == NULL &&
sshbind->dsakey == NULL &&
sshbind->rsakey == NULL) {
ssh_set_error(sshbind, SSH_FATAL,
"DSA or RSA host key file must be set before listen()");
"ECDSA, DSA, or RSA host key file must be set");
return SSH_ERROR;
}
#ifdef HAVE_ECC
if (sshbind->ecdsakey) {
if (sshbind->ecdsa == NULL && sshbind->ecdsakey != NULL) {
rc = ssh_pki_import_privkey_file(sshbind->ecdsakey,
NULL,
NULL,
@ -179,12 +172,13 @@ int ssh_bind_listen(ssh_bind sshbind) {
ssh_set_error(sshbind, SSH_FATAL,
"The ECDSA host key has the wrong type");
ssh_key_free(sshbind->ecdsa);
sshbind->ecdsa = NULL;
return SSH_ERROR;
}
}
#endif
if (sshbind->dsakey) {
if (sshbind->dsa == NULL && sshbind->dsakey != NULL) {
rc = ssh_pki_import_privkey_file(sshbind->dsakey,
NULL,
NULL,
@ -201,11 +195,12 @@ int ssh_bind_listen(ssh_bind sshbind) {
"The DSA host key has the wrong type: %d",
ssh_key_type(sshbind->dsa));
ssh_key_free(sshbind->dsa);
sshbind->dsa = NULL;
return SSH_ERROR;
}
}
if (sshbind->rsakey) {
if (sshbind->rsa == NULL && sshbind->rsakey != NULL) {
rc = ssh_pki_import_privkey_file(sshbind->rsakey,
NULL,
NULL,
@ -222,10 +217,29 @@ int ssh_bind_listen(ssh_bind sshbind) {
ssh_set_error(sshbind, SSH_FATAL,
"The RSA host key has the wrong type");
ssh_key_free(sshbind->rsa);
sshbind->rsa = NULL;
return SSH_ERROR;
}
}
return SSH_OK;
}
int ssh_bind_listen(ssh_bind sshbind) {
const char *host;
socket_t fd;
int rc;
if (ssh_init() < 0) {
ssh_set_error(sshbind, SSH_FATAL, "ssh_init() failed");
return -1;
}
rc = ssh_bind_import_keys(sshbind);
if (rc != SSH_OK) {
return SSH_ERROR;
}
if (sshbind->bindfd == SSH_INVALID_SOCKET) {
host = sshbind->bindaddr;
if (host == NULL) {
@ -235,10 +249,11 @@ int ssh_bind_listen(ssh_bind sshbind) {
fd = bind_socket(sshbind, host, sshbind->bindport);
if (fd == SSH_INVALID_SOCKET) {
ssh_key_free(sshbind->dsa);
sshbind->dsa = NULL;
ssh_key_free(sshbind->rsa);
sshbind->rsa = NULL;
return -1;
}
sshbind->bindfd = fd;
if (listen(fd, 10) < 0) {
ssh_set_error(sshbind, SSH_FATAL,
@ -246,9 +261,13 @@ int ssh_bind_listen(ssh_bind sshbind) {
fd, strerror(errno));
close(fd);
ssh_key_free(sshbind->dsa);
sshbind->dsa = NULL;
ssh_key_free(sshbind->rsa);
sshbind->rsa = NULL;
return -1;
}
sshbind->bindfd = fd;
} else {
SSH_LOG(SSH_LOG_INFO, "Using app-provided bind socket");
}
@ -341,11 +360,18 @@ void ssh_bind_free(ssh_bind sshbind){
/* options */
SAFE_FREE(sshbind->banner);
SAFE_FREE(sshbind->bindaddr);
SAFE_FREE(sshbind->dsakey);
SAFE_FREE(sshbind->rsakey);
SAFE_FREE(sshbind->dsa);
SAFE_FREE(sshbind->rsa);
SAFE_FREE(sshbind->bindaddr);
SAFE_FREE(sshbind->ecdsakey);
ssh_key_free(sshbind->dsa);
sshbind->dsa = NULL;
ssh_key_free(sshbind->rsa);
sshbind->rsa = NULL;
ssh_key_free(sshbind->ecdsa);
sshbind->ecdsa = NULL;
for (i = 0; i < 10; i++) {
if (sshbind->wanted_methods[i]) {
@ -357,7 +383,7 @@ void ssh_bind_free(ssh_bind sshbind){
}
int ssh_bind_accept_fd(ssh_bind sshbind, ssh_session session, socket_t fd){
int i;
int i, rc;
if (session == NULL){
ssh_set_error(sshbind, SSH_FATAL,"session is null");
@ -368,7 +394,7 @@ int ssh_bind_accept_fd(ssh_bind sshbind, ssh_session session, socket_t fd){
session->version = 2;
/* copy options */
for (i = 0; i < 10; ++i) {
for (i = 0; i < 10; i++) {
if (sshbind->wanted_methods[i]) {
session->opts.wanted_methods[i] = strdup(sshbind->wanted_methods[i]);
if (session->opts.wanted_methods[i] == NULL) {
@ -388,7 +414,8 @@ int ssh_bind_accept_fd(ssh_bind sshbind, ssh_session session, socket_t fd){
}
session->common.log_verbosity = sshbind->common.log_verbosity;
if(sshbind->banner != NULL)
session->opts.custombanner = strdup(sshbind->banner);
ssh_socket_free(session->socket);
session->socket = ssh_socket_new(session);
if (session->socket == NULL) {
@ -399,6 +426,16 @@ int ssh_bind_accept_fd(ssh_bind sshbind, ssh_session session, socket_t fd){
ssh_socket_set_fd(session->socket, fd);
ssh_socket_get_poll_handle_out(session->socket);
/* We must try to import any keys that could be imported in case
* we are not using ssh_bind_listen (which is the other place
* where keys can be imported) on this ssh_bind and are instead
* only using ssh_bind_accept_fd to manage sockets ourselves.
*/
rc = ssh_bind_import_keys(sshbind);
if (rc != SSH_OK) {
return SSH_ERROR;
}
#ifdef HAVE_ECC
if (sshbind->ecdsa) {
session->srv.ecdsa_key = ssh_key_dup(sshbind->ecdsa);
@ -422,6 +459,8 @@ int ssh_bind_accept_fd(ssh_bind sshbind, ssh_session session, socket_t fd){
return SSH_ERROR;
}
}
/* force PRNG to change state in case we fork after ssh_bind_accept */
ssh_reseed();
return SSH_OK;
}

438
libssh/src/buffer.c
View File

@ -24,6 +24,7 @@
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#ifndef _WIN32
#include <netinet/in.h>
@ -32,6 +33,8 @@
#include "libssh/priv.h"
#include "libssh/buffer.h"
#include "libssh/misc.h"
#include "libssh/bignum.h"
/**
* @defgroup libssh_buffer The SSH buffer functions.
@ -104,13 +107,25 @@ void ssh_buffer_free(struct ssh_buffer_struct *buffer) {
if (buffer->data) {
/* burn the data */
memset(buffer->data, 0, buffer->allocated);
BURN_BUFFER(buffer->data, buffer->allocated);
SAFE_FREE(buffer->data);
}
memset(buffer, 'X', sizeof(*buffer));
BURN_BUFFER(buffer, sizeof(struct ssh_buffer_struct));
SAFE_FREE(buffer);
}
/**
* @brief Sets the buffer as secure.
*
* A secure buffer will never leave cleartext data in the heap
* after being reallocated or freed.
*
* @param[in] buffer buffer to set secure.
*/
void ssh_buffer_set_secure(ssh_buffer buffer){
buffer->secure = 1;
}
static int realloc_buffer(struct ssh_buffer_struct *buffer, size_t needed) {
size_t smallest = 1;
char *new;
@ -125,9 +140,20 @@ static int realloc_buffer(struct ssh_buffer_struct *buffer, size_t needed) {
smallest <<= 1;
}
needed = smallest;
new = realloc(buffer->data, needed);
if (new == NULL) {
return -1;
if (buffer->secure){
new = malloc(needed);
if (new == NULL) {
return -1;
}
memcpy(new, buffer->data,buffer->used);
BURN_BUFFER(buffer->data, buffer->used);
SAFE_FREE(buffer->data);
} else {
new = realloc(buffer->data, needed);
if (new == NULL) {
buffer->data = NULL;
return -1;
}
}
buffer->data = new;
buffer->allocated = needed;
@ -140,12 +166,20 @@ static int realloc_buffer(struct ssh_buffer_struct *buffer, size_t needed) {
* @param buffer SSH buffer
*/
static void buffer_shift(ssh_buffer buffer){
uint32_t burn_pos = buffer->pos;
buffer_verify(buffer);
if(buffer->pos==0)
return;
memmove(buffer->data, buffer->data + buffer->pos, buffer->used - buffer->pos);
buffer->used -= buffer->pos;
buffer->pos=0;
if (buffer->secure){
void *ptr = buffer->data + buffer->used;
BURN_BUFFER(ptr, burn_pos);
}
buffer_verify(buffer);
}
@ -158,9 +192,10 @@ static void buffer_shift(ssh_buffer buffer){
*
* @return 0 on success, < 0 on error.
*/
int buffer_reinit(struct ssh_buffer_struct *buffer) {
int ssh_buffer_reinit(struct ssh_buffer_struct *buffer)
{
buffer_verify(buffer);
memset(buffer->data, 0, buffer->used);
BURN_BUFFER(buffer->data, buffer->used);
buffer->used = 0;
buffer->pos = 0;
if(buffer->allocated > 127) {
@ -185,7 +220,8 @@ int buffer_reinit(struct ssh_buffer_struct *buffer) {
*
* @return 0 on success, < 0 on error.
*/
int buffer_add_data(struct ssh_buffer_struct *buffer, const void *data, uint32_t len) {
int ssh_buffer_add_data(struct ssh_buffer_struct *buffer, const void *data, uint32_t len)
{
buffer_verify(buffer);
if (buffer->used + len < len) {
@ -222,7 +258,7 @@ int buffer_add_ssh_string(struct ssh_buffer_struct *buffer,
uint32_t len = 0;
len = ssh_string_len(string);
if (buffer_add_data(buffer, string, len + sizeof(uint32_t)) < 0) {
if (ssh_buffer_add_data(buffer, string, len + sizeof(uint32_t)) < 0) {
return -1;
}
@ -240,12 +276,16 @@ int buffer_add_ssh_string(struct ssh_buffer_struct *buffer,
*
* @return 0 on success, -1 on error.
*/
int buffer_add_u32(struct ssh_buffer_struct *buffer,uint32_t data){
if (buffer_add_data(buffer, &data, sizeof(data)) < 0) {
return -1;
}
int buffer_add_u32(struct ssh_buffer_struct *buffer,uint32_t data)
{
int rc;
return 0;
rc = ssh_buffer_add_data(buffer, &data, sizeof(data));
if (rc < 0) {
return -1;
}
return 0;
}
/**
@ -259,12 +299,16 @@ int buffer_add_u32(struct ssh_buffer_struct *buffer,uint32_t data){
*
* @return 0 on success, -1 on error.
*/
int buffer_add_u16(struct ssh_buffer_struct *buffer,uint16_t data){
if (buffer_add_data(buffer, &data, sizeof(data)) < 0) {
return -1;
}
int buffer_add_u16(struct ssh_buffer_struct *buffer,uint16_t data)
{
int rc;
return 0;
rc = ssh_buffer_add_data(buffer, &data, sizeof(data));
if (rc < 0) {
return -1;
}
return 0;
}
/**
@ -278,12 +322,16 @@ int buffer_add_u16(struct ssh_buffer_struct *buffer,uint16_t data){
*
* @return 0 on success, -1 on error.
*/
int buffer_add_u64(struct ssh_buffer_struct *buffer, uint64_t data){
if (buffer_add_data(buffer, &data, sizeof(data)) < 0) {
return -1;
}
int buffer_add_u64(struct ssh_buffer_struct *buffer, uint64_t data)
{
int rc;
return 0;
rc = ssh_buffer_add_data(buffer, &data, sizeof(data));
if (rc < 0) {
return -1;
}
return 0;
}
/**
@ -297,12 +345,16 @@ int buffer_add_u64(struct ssh_buffer_struct *buffer, uint64_t data){
*
* @return 0 on success, -1 on error.
*/
int buffer_add_u8(struct ssh_buffer_struct *buffer,uint8_t data){
if (buffer_add_data(buffer, &data, sizeof(uint8_t)) < 0) {
return -1;
}
int buffer_add_u8(struct ssh_buffer_struct *buffer,uint8_t data)
{
int rc;
return 0;
rc = ssh_buffer_add_data(buffer, &data, sizeof(uint8_t));
if (rc < 0) {
return -1;
}
return 0;
}
/**
@ -360,12 +412,18 @@ int buffer_prepend_data(struct ssh_buffer_struct *buffer, const void *data,
* @return 0 on success, -1 on error.
*/
int buffer_add_buffer(struct ssh_buffer_struct *buffer,
struct ssh_buffer_struct *source) {
if (buffer_add_data(buffer, buffer_get_rest(source), buffer_get_rest_len(source)) < 0) {
return -1;
}
struct ssh_buffer_struct *source)
{
int rc;
return 0;
rc = ssh_buffer_add_data(buffer,
buffer_get_rest(source),
buffer_get_rest_len(source));
if (rc < 0) {
return -1;
}
return 0;
}
/**
@ -621,6 +679,318 @@ struct ssh_string_struct *buffer_get_mpint(struct ssh_buffer_struct *buffer) {
return str;
}
/** @internal
* @brief Add multiple values in a buffer on a single function call
* @param[in] buffer The buffer to add to
* @param[in] format A format string of arguments.
* @param[in] ap A va_list of arguments.
* @returns SSH_OK on success
* SSH_ERROR on error
* @see ssh_buffer_add_format() for format list values.
*/
int ssh_buffer_pack_va(struct ssh_buffer_struct *buffer, const char *format, va_list ap){
int rc = SSH_ERROR;
const char *p;
union {
uint8_t byte;
uint16_t word;
uint32_t dword;
uint64_t qword;
ssh_string string;
void *data;
} o;
char *cstring;
bignum b;
size_t len;
for (p = format; *p != '\0'; p++) {
switch(*p) {
case 'b':
o.byte = (uint8_t)va_arg(ap, unsigned int);
rc = buffer_add_u8(buffer, o.byte);
break;
case 'w':
o.word = (uint16_t)va_arg(ap, unsigned int);
o.word = htons(o.word);
rc = buffer_add_u16(buffer, o.word);
break;
case 'd':
o.dword = va_arg(ap, uint32_t);
o.dword = htonl(o.dword);
rc = buffer_add_u32(buffer, o.dword);
break;
case 'q':
o.qword = va_arg(ap, uint64_t);
o.qword = htonll(o.qword);
rc = buffer_add_u64(buffer, o.qword);
break;
case 'S':
o.string = va_arg(ap, ssh_string);
rc = buffer_add_ssh_string(buffer, o.string);
o.string = NULL;
break;
case 's':
cstring = va_arg(ap, char *);
len = strlen(cstring);
rc = buffer_add_u32(buffer, htonl(len));
if (rc == SSH_OK){
rc = ssh_buffer_add_data(buffer, cstring, len);
}
cstring = NULL;
break;
case 'P':
len = va_arg(ap, size_t);
o.data = va_arg(ap, void *);
rc = ssh_buffer_add_data(buffer, o.data, len);
o.data = NULL;
break;
case 'B':
b = va_arg(ap, bignum);
o.string = make_bignum_string(b);
if(o.string == NULL){
rc = SSH_ERROR;
break;
}
rc = buffer_add_ssh_string(buffer, o.string);
SAFE_FREE(o.string);
break;
case 't':
cstring = va_arg(ap, char *);
len = strlen(cstring);
rc = ssh_buffer_add_data(buffer, cstring, len);
cstring = NULL;
break;
default:
SSH_LOG(SSH_LOG_WARN, "Invalid buffer format %c", *p);
rc = SSH_ERROR;
}
if (rc != SSH_OK){
break;
}
}
if (rc != SSH_ERROR){
/* verify that the last hidden argument is correct */
o.dword = va_arg(ap, uint32_t);
if (o.dword != SSH_BUFFER_PACK_END){
rc = SSH_ERROR;
}
}
return rc;
}
/** @internal
* @brief Add multiple values in a buffer on a single function call
* @param[in] buffer The buffer to add to
* @param[in] format A format string of arguments. This string contains single
* letters describing the order and type of arguments:
* 'b': uint8_t (pushed in network byte order)
* 'w': uint16_t (pushed in network byte order)
* 'd': uint32_t (pushed in network byte order)
* 'q': uint64_t (pushed in network byte order)
* 'S': ssh_string
* 's': char * (C string, pushed as SSH string)
* 't': char * (C string, pushed as free text)
* 'P': size_t, void * (len of data, pointer to data)
* only pushes data.
* 'B': bignum (pushed as SSH string)
* @returns SSH_OK on success
* SSH_ERROR on error
* @warning when using 'P' with a constant size (e.g. 8), do not
* forget to cast to (size_t).
*/
int _ssh_buffer_pack(struct ssh_buffer_struct *buffer, const char *format, ...){
va_list ap;
int rc;
va_start(ap, format);
rc = ssh_buffer_pack_va(buffer, format, ap);
va_end(ap);
return rc;
}
/** @internal
* @brief Get multiple values from a buffer on a single function call
* @param[in] buffer The buffer to get from
* @param[in] format A format string of arguments.
* @param[in] ap A va_list of arguments.
* @returns SSH_OK on success
* SSH_ERROR on error
* @see ssh_buffer_get_format() for format list values.
*/
int ssh_buffer_unpack_va(struct ssh_buffer_struct *buffer, const char *format, va_list ap){
int rc = SSH_ERROR;
const char *p, *last;
union {
uint8_t *byte;
uint16_t *word;
uint32_t *dword;
uint64_t *qword;
ssh_string *string;
char **cstring;
void **data;
} o;
size_t len, rlen;
uint32_t u32len;
va_list ap_copy;
/* copy the argument list in case a rollback is needed */
va_copy(ap_copy, ap);
for (p = format; *p != '\0'; p++) {
switch (*p) {
case 'b':
o.byte = va_arg(ap, uint8_t *);
rlen = buffer_get_u8(buffer, o.byte);
rc = rlen==1 ? SSH_OK : SSH_ERROR;
break;
case 'w':
o.word = va_arg(ap, uint16_t *);
rlen = buffer_get_data(buffer, o.word, sizeof(uint16_t));
*o.word = ntohs(*o.word);
rc = rlen==2 ? SSH_OK : SSH_ERROR;
break;
case 'd':
o.dword = va_arg(ap, uint32_t *);
rlen = buffer_get_u32(buffer, o.dword);
*o.dword = ntohl(*o.dword);
rc = rlen==4 ? SSH_OK : SSH_ERROR;
break;
case 'q':
o.qword = va_arg(ap, uint64_t*);
rlen = buffer_get_u64(buffer, o.qword);
*o.qword = ntohll(*o.qword);
rc = rlen==8 ? SSH_OK : SSH_ERROR;
break;
case 'S':
o.string = va_arg(ap, ssh_string *);
*o.string = buffer_get_ssh_string(buffer);
rc = *o.string != NULL ? SSH_OK : SSH_ERROR;
o.string = NULL;
break;
case 's':
o.cstring = va_arg(ap, char **);
*o.cstring = NULL;
rc = buffer_get_u32(buffer, &u32len);
if (rc != 4){
rc = SSH_ERROR;
break;
}
len = ntohl(u32len);
if (len > UINT_MAX - 1){
rc = SSH_ERROR;
break;
}
*o.cstring = malloc(len + 1);
if (*o.cstring == NULL){
rc = SSH_ERROR;
break;
}
rlen = buffer_get_data(buffer, *o.cstring, len);
if (rlen != len){
SAFE_FREE(*o.cstring);
rc = SSH_ERROR;
break;
}
(*o.cstring)[len] = '\0';
o.cstring = NULL;
rc = SSH_OK;
break;
case 'P':
len = va_arg(ap, size_t);
o.data = va_arg(ap, void **);
*o.data = malloc(len);
if(*o.data == NULL){
rc = SSH_ERROR;
break;
}
rlen = buffer_get_data(buffer, *o.data, len);
if (rlen != len){
SAFE_FREE(*o.data);
rc = SSH_ERROR;
break;
}
o.data = NULL;
rc = SSH_OK;
break;
default:
SSH_LOG(SSH_LOG_WARN, "Invalid buffer format %c", *p);
rc = SSH_ERROR;
}
if (rc != SSH_OK) {
break;
}
}
if (rc != SSH_ERROR){
/* verify that the last hidden argument is correct */
uint32_t canary = va_arg(ap, uint32_t);
if (canary != SSH_BUFFER_PACK_END){
rc = SSH_ERROR;
}
}
if (rc != SSH_OK){
/* Reset the format string and erase everything that was allocated */
last = p;
for(p=format;p<last;++p){
switch(*p){
case 'b':
case 'w':
case 'd':
case 'q':
(void)va_arg(ap_copy, void *);
break;
case 'S':
o.string=va_arg(ap_copy, ssh_string *);
SAFE_FREE(*o.string);
break;
case 's':
o.cstring=va_arg(ap_copy, char **);
SAFE_FREE(*o.cstring);
break;
case 'P':
(void)va_arg(ap_copy, size_t);
o.data = va_arg(ap_copy, void **);
SAFE_FREE(*o.data);
break;
default:
(void)va_arg(ap_copy, void *);
break;
}
}
}
va_end(ap_copy);
return rc;
}
/** @internal
* @brief Get multiple values from a buffer on a single function call
* @param[in] buffer The buffer to get from
* @param[in] format A format string of arguments. This string contains single
* letters describing the order and type of arguments:
* 'b': uint8_t * (pulled in network byte order)
* 'w': uint16_t * (pulled in network byte order)
* 'd': uint32_t * (pulled in network byte order)
* 'q': uint64_t * (pulled in network byte order)
* 'S': ssh_string *
* 's': char ** (C string, pulled as SSH string)
* 'P': size_t, void ** (len of data, pointer to data)
* only pulls data.
* @returns SSH_OK on success
* SSH_ERROR on error
* @warning when using 'P' with a constant size (e.g. 8), do not
* forget to cast to (size_t).
*/
int _ssh_buffer_unpack(struct ssh_buffer_struct *buffer, const char *format, ...){
va_list ap;
int rc;
va_start(ap, format);
rc = ssh_buffer_unpack_va(buffer, format, ap);
va_end(ap);
return rc;
}
/** @} */
/* vim: set ts=4 sw=4 et cindent: */

2
libssh/src/callbacks.c
View File

@ -3,7 +3,7 @@
*
* This file is part of the SSH Library
*
* Copyright (c) 2009 by Andreas Schneider <mail@cynapses.org>
* Copyright (c) 2009-2013 by Andreas Schneider <asn@cryptomilk.org>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by

880
libssh/src/channels.c
View File

File diff suppressed because it is too large Load Diff

7
libssh/src/channels1.c
View File

@ -4,7 +4,7 @@
* This file is part of the SSH Library
*
* Copyright (c) 2003-2008 by Aris Adamantiadis
* Copyright (c) 2009 by Andreas Schneider <mail@cynapses.org>
* Copyright (c) 2009 by Andreas Schneider <asn@cryptomilk.org>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -356,7 +356,7 @@ int channel_write1(ssh_channel channel, const void *data, int len) {
effectivelen = len > 32000 ? 32000 : len;
if (buffer_add_u32(session->out_buffer, htonl(effectivelen)) < 0 ||
buffer_add_data(session->out_buffer, ptr, effectivelen) < 0) {
ssh_buffer_add_data(session->out_buffer, ptr, effectivelen) < 0) {
return -1;
}
@ -367,6 +367,9 @@ int channel_write1(ssh_channel channel, const void *data, int len) {
return -1;
}
ssh_handle_packets(session, SSH_TIMEOUT_NONBLOCKING);
if (channel->counter != NULL) {
channel->counter->out_bytes += effectivelen;
}
}
if (ssh_blocking_flush(session,SSH_TIMEOUT_USER) == SSH_ERROR)
return -1;

100
libssh/src/client.c
View File

@ -3,7 +3,7 @@
*
* This file is part of the SSH Library
*
* Copyright (c) 2003-2008 by Aris Adamantiadis
* Copyright (c) 2003-2013 by Aris Adamantiadis
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -60,12 +60,15 @@
static void socket_callback_connected(int code, int errno_code, void *user){
ssh_session session=(ssh_session)user;
if(session->session_state != SSH_SESSION_STATE_CONNECTING){
if (session->session_state != SSH_SESSION_STATE_CONNECTING &&
session->session_state != SSH_SESSION_STATE_SOCKET_CONNECTED)
{
ssh_set_error(session,SSH_FATAL, "Wrong state in socket_callback_connected : %d",
session->session_state);
return;
}
SSH_LOG(SSH_LOG_RARE,"Socket connection callback: %d (%d)",code, errno_code);
if(code == SSH_SOCKET_CONNECTED_OK)
session->session_state=SSH_SESSION_STATE_SOCKET_CONNECTED;
@ -152,19 +155,27 @@ int ssh_send_banner(ssh_session session, int server) {
banner = session->version == 1 ? CLIENTBANNER1 : CLIENTBANNER2;
if (server) {
session->serverbanner = strdup(banner);
if(session->opts.custombanner == NULL){
session->serverbanner = strdup(banner);
} else {
session->serverbanner = malloc(strlen(session->opts.custombanner) + 9);
if(!session->serverbanner)
goto end;
strcpy(session->serverbanner, "SSH-2.0-");
strcat(session->serverbanner, session->opts.custombanner);
}
if (session->serverbanner == NULL) {
goto end;
}
snprintf(buffer, 128, "%s\n", session->serverbanner);
} else {
session->clientbanner = strdup(banner);
if (session->clientbanner == NULL) {
goto end;
}
snprintf(buffer, 128, "%s\n", session->clientbanner);
}
snprintf(buffer, 128, "%s\n", banner);
if (ssh_socket_write(session->socket, buffer, strlen(buffer)) == SSH_ERROR) {
goto end;
}
@ -258,24 +269,19 @@ static int ssh_service_request_termination(void *s){
* @bug actually only works with ssh-userauth
*/
int ssh_service_request(ssh_session session, const char *service) {
ssh_string service_s = NULL;
int rc=SSH_ERROR;
if(session->auth_service_state != SSH_AUTH_SERVICE_NONE)
goto pending;
if (buffer_add_u8(session->out_buffer, SSH2_MSG_SERVICE_REQUEST) < 0) {
return SSH_ERROR;
}
service_s = ssh_string_from_char(service);
if (service_s == NULL) {
return SSH_ERROR;
}
if (buffer_add_ssh_string(session->out_buffer,service_s) < 0) {
ssh_string_free(service_s);
rc = ssh_buffer_pack(session->out_buffer,
"bs",
SSH2_MSG_SERVICE_REQUEST,
service);
if (rc != SSH_OK){
ssh_set_error_oom(session);
return SSH_ERROR;
}
ssh_string_free(service_s);
session->auth_service_state=SSH_AUTH_SERVICE_SENT;
if (packet_send(session) == SSH_ERROR) {
ssh_set_error(session, SSH_FATAL,
@ -495,7 +501,12 @@ int ssh_connect(ssh_session session) {
ssh_set_error(session, SSH_FATAL, "Couldn't apply options");
return SSH_ERROR;
}
SSH_LOG(SSH_LOG_RARE,"libssh %s, using threading %s", ssh_copyright(), ssh_threads_get_type());
SSH_LOG(SSH_LOG_PROTOCOL,
"libssh %s, using threading %s",
ssh_copyright(),
ssh_threads_get_type());
session->ssh_connection_callback = ssh_client_connection_callback;
session->session_state=SSH_SESSION_STATE_CONNECTING;
ssh_socket_set_callbacks(session->socket,&session->socket_callbacks);
@ -504,6 +515,7 @@ int ssh_connect(ssh_session session) {
session->socket_callbacks.exception=ssh_socket_exception_callback;
session->socket_callbacks.userdata=session;
if (session->opts.fd != SSH_INVALID_SOCKET) {
session->session_state=SSH_SESSION_STATE_SOCKET_CONNECTED;
ssh_socket_set_fd(session->socket, session->opts.fd);
ret=SSH_OK;
#ifndef _WIN32
@ -535,7 +547,8 @@ pending:
}
SSH_LOG(SSH_LOG_PACKET,"Actual timeout : %d", timeout);
ret = ssh_handle_packets_termination(session, timeout, ssh_connect_termination, session);
if (ret == SSH_ERROR || !ssh_connect_termination(session)) {
if (session->session_state != SSH_SESSION_STATE_ERROR &&
(ret == SSH_ERROR || !ssh_connect_termination(session))) {
ssh_set_error(session, SSH_FATAL,
"Timeout connecting to %s", session->opts.host);
session->session_state = SSH_SESSION_STATE_ERROR;
@ -612,32 +625,23 @@ int ssh_get_openssh_version(ssh_session session) {
* @param[in] session The SSH session to use.
*/
void ssh_disconnect(ssh_session session) {
ssh_string str = NULL;
struct ssh_iterator *it;
int rc;
if (session == NULL) {
return;
}
if (session->socket != NULL && ssh_socket_is_open(session->socket)) {
if (buffer_add_u8(session->out_buffer, SSH2_MSG_DISCONNECT) < 0) {
rc = ssh_buffer_pack(session->out_buffer,
"bds",
SSH2_MSG_DISCONNECT,
SSH2_DISCONNECT_BY_APPLICATION,
"Bye Bye");
if (rc != SSH_OK){
ssh_set_error_oom(session);
goto error;
}
if (buffer_add_u32(session->out_buffer,
htonl(SSH2_DISCONNECT_BY_APPLICATION)) < 0) {
goto error;
}
str = ssh_string_from_char("Bye Bye");
if (str == NULL) {
goto error;
}
if (buffer_add_ssh_string(session->out_buffer,str) < 0) {
ssh_string_free(str);
goto error;
}
ssh_string_free(str);
packet_send(session);
ssh_socket_close(session->socket);
@ -651,21 +655,25 @@ error:
session->session_state=SSH_SESSION_STATE_DISCONNECTED;
while ((it=ssh_list_get_iterator(session->channels)) != NULL) {
ssh_channel_free(ssh_iterator_value(ssh_channel,it));
ssh_channel_do_free(ssh_iterator_value(ssh_channel,it));
ssh_list_remove(session->channels, it);
}
if(session->current_crypto){
crypto_free(session->current_crypto);
session->current_crypto=NULL;
}
if(session->in_buffer)
buffer_reinit(session->in_buffer);
if(session->out_buffer)
buffer_reinit(session->out_buffer);
if(session->in_hashbuf)
buffer_reinit(session->in_hashbuf);
if(session->out_hashbuf)
buffer_reinit(session->out_hashbuf);
if (session->in_buffer) {
ssh_buffer_reinit(session->in_buffer);
}
if (session->out_buffer) {
ssh_buffer_reinit(session->out_buffer);
}
if (session->in_hashbuf) {
ssh_buffer_reinit(session->in_hashbuf);
}
if (session->out_hashbuf) {
ssh_buffer_reinit(session->out_hashbuf);
}
session->auth_methods = 0;
SAFE_FREE(session->serverbanner);
SAFE_FREE(session->clientbanner);
@ -687,8 +695,8 @@ error:
}
const char *ssh_copyright(void) {
return SSH_STRINGIFY(LIBSSH_VERSION) " (c) 2003-2010 Aris Adamantiadis "
"(aris@0xbadc0de.be) Distributed under the LGPL, please refer to COPYING "
return SSH_STRINGIFY(LIBSSH_VERSION) " (c) 2003-2014 Aris Adamantiadis, Andreas Schneider, "
"and libssh contributors. Distributed under the LGPL, please refer to COPYING "
"file for information about your rights";
}
/** @} */

57
libssh/src/config.c
View File

@ -3,7 +3,7 @@
*
* This file is part of the SSH Library
*
* Copyright (c) 2009 by Andreas Schneider <mail@cynapses.org>
* Copyright (c) 2009-2013 by Andreas Schneider <asn@cryptomilk.org>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -46,7 +46,10 @@ enum ssh_config_opcode_e {
SOC_PROTOCOL,
SOC_STRICTHOSTKEYCHECK,
SOC_KNOWNHOSTS,
SOC_PROXYCOMMAND
SOC_PROXYCOMMAND,
SOC_GSSAPISERVERIDENTITY,
SOC_GSSAPICLIENTIDENTITY,
SOC_GSSAPIDELEGATECREDENTIALS,
};
struct ssh_config_keyword_table_s {
@ -67,6 +70,9 @@ static struct ssh_config_keyword_table_s ssh_config_keyword_table[] = {
{ "stricthostkeychecking", SOC_STRICTHOSTKEYCHECK },
{ "userknownhostsfile", SOC_KNOWNHOSTS },
{ "proxycommand", SOC_PROXYCOMMAND },
{ "gssapiserveridentity", SOC_GSSAPISERVERIDENTITY },
{ "gssapiserveridentity", SOC_GSSAPICLIENTIDENTITY },
{ "gssapidelegatecredentials", SOC_GSSAPIDELEGATECREDENTIALS },
{ NULL, SOC_UNSUPPORTED }
};
@ -213,16 +219,25 @@ static int ssh_config_parse_line(ssh_session session, const char *line,
switch (opcode) {
case SOC_HOST:
*parsing = 0;
lowerhost = (session->opts.host) ? ssh_lowercase(session->opts.host) : NULL;
for (p = ssh_config_get_str_tok(&s, NULL); p && *p;
p = ssh_config_get_str_tok(&s, NULL)) {
if (match_hostname(lowerhost, p, strlen(p))) {
*parsing = 1;
*parsing = 0;
lowerhost = (session->opts.host) ? ssh_lowercase(session->opts.host) : NULL;
for (p = ssh_config_get_str_tok(&s, NULL);
p != NULL && p[0] != '\0';
p = ssh_config_get_str_tok(&s, NULL)) {
char *z = ssh_path_expand_escape(session, p);
int ok;
if (z == NULL) {
z = strdup(p);
}
ok = match_hostname(lowerhost, z, strlen(z));
if (ok) {
*parsing = 1;
}
free(z);
}
}
SAFE_FREE(lowerhost);
break;
SAFE_FREE(lowerhost);
break;
case SOC_HOSTNAME:
p = ssh_config_get_str_tok(&s, NULL);
if (p && *parsing) {
@ -323,6 +338,24 @@ static int ssh_config_parse_line(ssh_session session, const char *line,
ssh_options_set(session, SSH_OPTIONS_PROXYCOMMAND, p);
}
break;
case SOC_GSSAPISERVERIDENTITY:
p = ssh_config_get_str_tok(&s, NULL);
if (p && *parsing) {
ssh_options_set(session, SSH_OPTIONS_GSSAPI_SERVER_IDENTITY, p);
}
break;
case SOC_GSSAPICLIENTIDENTITY:
p = ssh_config_get_str_tok(&s, NULL);
if (p && *parsing) {
ssh_options_set(session, SSH_OPTIONS_GSSAPI_CLIENT_IDENTITY, p);
}
break;
case SOC_GSSAPIDELEGATECREDENTIALS:
i = ssh_config_get_yesno(&s, -1);
if (i >=0 && *parsing) {
ssh_options_set(session, SSH_OPTIONS_GSSAPI_DELEGATE_CREDENTIALS, &i);
}
break;
case SOC_UNSUPPORTED:
SSH_LOG(SSH_LOG_RARE, "Unsupported option: %s, line: %d\n",
keyword, count);
@ -350,7 +383,7 @@ int ssh_config_parse_file(ssh_session session, const char *filename) {
return 0;
}
SSH_LOG(SSH_LOG_RARE, "Reading configuration data from %s", filename);
SSH_LOG(SSH_LOG_PACKET, "Reading configuration data from %s", filename);
parsing = 1;
while (fgets(line, sizeof(line), f)) {

14
libssh/src/connect.c
View File

@ -3,7 +3,7 @@
*
* This file is part of the SSH Library
*
* Copyright (c) 2003-2009 by Aris Adamantiadis
* Copyright (c) 2003-2013 by Aris Adamantiadis
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -382,7 +382,15 @@ socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
continue;
}
connect(s, itr->ai_addr, itr->ai_addrlen);
rc = connect(s, itr->ai_addr, itr->ai_addrlen);
if (rc == -1 && (errno != EINPROGRESS)) {
ssh_set_error(session, SSH_FATAL,
"Failed to connect: %s", strerror(errno));
ssh_connect_socket_close(s);
s = -1;
continue;
}
break;
}
@ -421,7 +429,7 @@ static int ssh_select_cb (socket_t fd, int revents, void *userdata){
* @param[in] readfds A fd_set of file descriptors to be select'ed for
* reading.
*
* @param[in] timeout A timeout for the select.
* @param[in] timeout The timeout in milliseconds.
*
* @return SSH_OK on success,
* SSH_ERROR on error,

70
libssh/src/curve25519.c
View File

@ -37,19 +37,14 @@
#include "libssh/crypto.h"
#include "libssh/dh.h"
#include "libssh/pki.h"
#include "libssh/bignum.h"
/** @internal
* @brief Starts curve25519-sha256@libssh.org key exchange
*/
int ssh_client_curve25519_init(ssh_session session){
ssh_string client_pubkey;
int rc;
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_KEX_ECDH_INIT);
if (rc < 0) {
return SSH_ERROR;
}
rc = ssh_get_random(session->next_crypto->curve25519_privkey, CURVE25519_PRIVKEY_SIZE, 1);
if (rc == 0){
ssh_set_error(session, SSH_FATAL, "PRNG error");
@ -58,15 +53,14 @@ int ssh_client_curve25519_init(ssh_session session){
crypto_scalarmult_base(session->next_crypto->curve25519_client_pubkey,
session->next_crypto->curve25519_privkey);
client_pubkey = ssh_string_new(CURVE25519_PUBKEY_SIZE);
if (client_pubkey == NULL) {
return SSH_ERROR;
}
ssh_string_fill(client_pubkey, session->next_crypto->curve25519_client_pubkey,
CURVE25519_PUBKEY_SIZE);
rc = buffer_add_ssh_string(session->out_buffer,client_pubkey);
if (rc < 0) {
ssh_string_free(client_pubkey);
rc = ssh_buffer_pack(session->out_buffer,
"bdP",
SSH2_MSG_KEX_ECDH_INIT,
CURVE25519_PUBKEY_SIZE,
(size_t)CURVE25519_PUBKEY_SIZE, session->next_crypto->curve25519_client_pubkey);
if (rc != SSH_OK) {
ssh_set_error_oom(session);
return SSH_ERROR;
}
@ -90,7 +84,7 @@ static int ssh_curve25519_build_k(ssh_session session) {
crypto_scalarmult(k, session->next_crypto->curve25519_privkey,
session->next_crypto->curve25519_server_pubkey);
BN_bin2bn(k, CURVE25519_PUBKEY_SIZE, session->next_crypto->k);
bignum_bin2bn(k, CURVE25519_PUBKEY_SIZE, session->next_crypto->k);
#ifdef DEBUG_CRYPTO
ssh_print_hexa("Session server cookie",
@ -133,6 +127,7 @@ int ssh_client_curve25519_reply(ssh_session session, ssh_buffer packet){
goto error;
}
memcpy(session->next_crypto->curve25519_server_pubkey, ssh_string_data(q_s_string), CURVE25519_PUBKEY_SIZE);
ssh_string_free(q_s_string);
signature = buffer_get_ssh_string(packet);
if (signature == NULL) {
@ -194,44 +189,36 @@ int ssh_server_curve25519_init(ssh_session session, ssh_buffer packet){
rc = ssh_get_random(session->next_crypto->curve25519_privkey, CURVE25519_PRIVKEY_SIZE, 1);
if (rc == 0){
ssh_set_error(session, SSH_FATAL, "PRNG error");
return SSH_ERROR;
ssh_set_error(session, SSH_FATAL, "PRNG error");
return SSH_ERROR;
}
crypto_scalarmult_base(session->next_crypto->curve25519_server_pubkey,
session->next_crypto->curve25519_privkey);
q_s_string = ssh_string_new(CURVE25519_PUBKEY_SIZE);
if (q_s_string == NULL) {
return SSH_ERROR;
}
ssh_string_fill(q_s_string, session->next_crypto->curve25519_server_pubkey,
CURVE25519_PUBKEY_SIZE);
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_KEX_ECDH_REPLY);
if (rc < 0) {
ssh_set_error_oom(session);
return SSH_ERROR;
goto error;
}
/* build k and session_id */
rc = ssh_curve25519_build_k(session);
if (rc < 0) {
ssh_set_error(session, SSH_FATAL, "Cannot build k number");
return SSH_ERROR;
goto error;
}
/* privkey is not allocated */
rc = ssh_get_key_params(session, &privkey);
if (rc == SSH_ERROR) {
return SSH_ERROR;
goto error;
}
rc = make_sessionid(session);
if (rc != SSH_OK) {
ssh_set_error(session, SSH_FATAL, "Could not create a session id");
return SSH_ERROR;
goto error;
}
/* add host's public key */
@ -239,29 +226,37 @@ int ssh_server_curve25519_init(ssh_session session, ssh_buffer packet){
session->next_crypto->server_pubkey);
if (rc < 0) {
ssh_set_error_oom(session);
return SSH_ERROR;
goto error;
}
/* add ecdh public key */
q_s_string = ssh_string_new(CURVE25519_PUBKEY_SIZE);
if (q_s_string == NULL) {
goto error;
}
ssh_string_fill(q_s_string,
session->next_crypto->curve25519_server_pubkey,
CURVE25519_PUBKEY_SIZE);
rc = buffer_add_ssh_string(session->out_buffer, q_s_string);
ssh_string_free(q_s_string);
if (rc < 0) {
ssh_set_error_oom(session);
return SSH_ERROR;
goto error;
}
/* add signature blob */
sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey);
if (sig_blob == NULL) {
ssh_set_error(session, SSH_FATAL, "Could not sign the session id");
return SSH_ERROR;
goto error;
}
rc = buffer_add_ssh_string(session->out_buffer, sig_blob);
ssh_string_free(sig_blob);
if (rc < 0) {
ssh_set_error_oom(session);
return SSH_ERROR;
goto error;
}
SSH_LOG(SSH_LOG_PROTOCOL, "SSH_MSG_KEX_ECDH_REPLY sent");
@ -273,7 +268,7 @@ int ssh_server_curve25519_init(ssh_session session, ssh_buffer packet){
/* Send the MSG_NEWKEYS */
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_NEWKEYS);
if (rc < 0) {
return SSH_ERROR;;
goto error;
}
session->dh_handshake_state = DH_STATE_NEWKEYS_SENT;
@ -281,6 +276,9 @@ int ssh_server_curve25519_init(ssh_session session, ssh_buffer packet){
SSH_LOG(SSH_LOG_PROTOCOL, "SSH_MSG_NEWKEYS sent");
return rc;
error:
ssh_buffer_reinit(session->out_buffer);
return SSH_ERROR;
}
#endif /* WITH_SERVER */

532
libssh/src/dh.c
View File

@ -3,8 +3,8 @@
*
* This file is part of the SSH Library
*
* Copyright (c) 2003-2008 by Aris Adamantiadis
* Copyright (c) 2009 by Andreas Schneider <mail@cynapses.org>
* Copyright (c) 2003-2013 by Aris Adamantiadis
* Copyright (c) 2009-2013 by Andreas Schneider <asn@cryptomilk.org>
* Copyright (c) 2012 by Dmitriy Kuznetsov <dk@yandex.ru>
*
* The SSH Library is free software; you can redistribute it and/or modify
@ -60,6 +60,7 @@
#include "libssh/dh.h"
#include "libssh/ssh2.h"
#include "libssh/pki.h"
#include "libssh/bignum.h"
/* todo: remove it */
#include "libssh/string.h"
@ -170,7 +171,7 @@ int ssh_crypto_init(void) {
return -1;
}
bignum_bin2bn(p_group14_value, P_GROUP14_LEN, &p_group14);
if (p_group1 == NULL) {
if (p_group14 == NULL) {
bignum_free(g);
bignum_free(p_group1);
g = NULL;
@ -225,20 +226,6 @@ void ssh_crypto_finalize(void) {
}
}
/* prints the bignum on stderr */
void ssh_print_bignum(const char *which, bignum num) {
#ifdef HAVE_LIBGCRYPT
unsigned char *hex = NULL;
bignum_bn2hex(num, &hex);
#elif defined HAVE_LIBCRYPTO
char *hex = NULL;
hex = bignum_bn2hex(num);
#endif
fprintf(stderr, "%s value: ", which);
fprintf(stderr, "%s\n", (hex == NULL) ? "(null)" : (char *) hex);
SAFE_FREE(hex);
}
int dh_generate_x(ssh_session session) {
session->next_crypto->x = bignum_new();
if (session->next_crypto->x == NULL) {
@ -351,62 +338,6 @@ int dh_generate_f(ssh_session session) {
return 0;
}
ssh_string make_bignum_string(bignum num) {
ssh_string ptr = NULL;
int pad = 0;
unsigned int len = bignum_num_bytes(num);
unsigned int bits = bignum_num_bits(num);
if (len == 0) {
return NULL;
}
/* If the first bit is set we have a negative number */
if (!(bits % 8) && bignum_is_bit_set(num, bits - 1)) {
pad++;
}
#ifdef DEBUG_CRYPTO
fprintf(stderr, "%d bits, %d bytes, %d padding\n", bits, len, pad);
#endif /* DEBUG_CRYPTO */
ptr = ssh_string_new(len + pad);
if (ptr == NULL) {
return NULL;
}
/* We have a negative number so we need a leading zero */
if (pad) {
ptr->data[0] = 0;
}
#ifdef HAVE_LIBGCRYPT
bignum_bn2bin(num, len, ptr->data + pad);
#elif HAVE_LIBCRYPTO
bignum_bn2bin(num, ptr->data + pad);
#endif
return ptr;
}
bignum make_string_bn(ssh_string string){
bignum bn = NULL;
unsigned int len = ssh_string_len(string);
#ifdef DEBUG_CRYPTO
fprintf(stderr, "Importing a %d bits, %d bytes object ...\n",
len * 8, len);
#endif /* DEBUG_CRYPTO */
#ifdef HAVE_LIBGCRYPT
bignum_bin2bn(string->data, len, &bn);
#elif defined HAVE_LIBCRYPTO
bn = bignum_bin2bn(string->data, len, NULL);
#endif
return bn;
}
ssh_string dh_get_e(ssh_session session) {
return make_bignum_string(session->next_crypto->e);
}
@ -504,10 +435,6 @@ int ssh_client_dh_init(ssh_session session){
ssh_string e = NULL;
int rc;
if (buffer_add_u8(session->out_buffer, SSH2_MSG_KEXDH_INIT) < 0) {
goto error;
}
if (dh_generate_x(session) < 0) {
goto error;
}
@ -520,9 +447,11 @@ int ssh_client_dh_init(ssh_session session){
goto error;
}
if (buffer_add_ssh_string(session->out_buffer, e) < 0) {
rc = ssh_buffer_pack(session->out_buffer, "bS", SSH2_MSG_KEXDH_INIT, e);
if (rc != SSH_OK) {
goto error;
}
ssh_string_burn(e);
ssh_string_free(e);
e=NULL;
@ -587,218 +516,180 @@ error:
return SSH_ERROR;
}
/*
static void sha_add(ssh_string str,SHACTX ctx){
sha1_update(ctx,str,string_len(str)+4);
#ifdef DEBUG_CRYPTO
ssh_print_hexa("partial hashed sessionid",str,string_len(str)+4);
#endif
}
*/
int make_sessionid(ssh_session session) {
ssh_string num = NULL;
ssh_string str = NULL;
ssh_buffer server_hash = NULL;
ssh_buffer client_hash = NULL;
ssh_buffer buf = NULL;
uint32_t len;
int rc = SSH_ERROR;
ssh_string num = NULL;
ssh_buffer server_hash = NULL;
ssh_buffer client_hash = NULL;
ssh_buffer buf = NULL;
int rc = SSH_ERROR;
buf = ssh_buffer_new();
if (buf == NULL) {
return rc;
}
str = ssh_string_from_char(session->clientbanner);
if (str == NULL) {
goto error;
}
if (buffer_add_ssh_string(buf, str) < 0) {
goto error;
}
ssh_string_free(str);
str = ssh_string_from_char(session->serverbanner);
if (str == NULL) {
goto error;
}
if (buffer_add_ssh_string(buf, str) < 0) {
goto error;
}
if (session->client) {
server_hash = session->in_hashbuf;
client_hash = session->out_hashbuf;
} else {
server_hash = session->out_hashbuf;
client_hash = session->in_hashbuf;
}
if (buffer_add_u32(server_hash, 0) < 0) {
goto error;
}
if (buffer_add_u8(server_hash, 0) < 0) {
goto error;
}
if (buffer_add_u32(client_hash, 0) < 0) {
goto error;
}
if (buffer_add_u8(client_hash, 0) < 0) {
goto error;
}
len = ntohl(buffer_get_rest_len(client_hash));
if (buffer_add_u32(buf,len) < 0) {
goto error;
}
if (buffer_add_data(buf, buffer_get_rest(client_hash),
buffer_get_rest_len(client_hash)) < 0) {
goto error;
}
len = ntohl(buffer_get_rest_len(server_hash));
if (buffer_add_u32(buf, len) < 0) {
goto error;
}
if (buffer_add_data(buf, buffer_get_rest(server_hash),
buffer_get_rest_len(server_hash)) < 0) {
goto error;
}
len = ssh_string_len(session->next_crypto->server_pubkey) + 4;
if (buffer_add_data(buf, session->next_crypto->server_pubkey, len) < 0) {
goto error;
}
if(session->next_crypto->kex_type == SSH_KEX_DH_GROUP1_SHA1 ||
session->next_crypto->kex_type == SSH_KEX_DH_GROUP14_SHA1) {
num = make_bignum_string(session->next_crypto->e);
if (num == NULL) {
goto error;
buf = ssh_buffer_new();
if (buf == NULL) {
return rc;
}
len = ssh_string_len(num) + 4;
if (buffer_add_data(buf, num, len) < 0) {
goto error;
rc = ssh_buffer_pack(buf,
"ss",
session->clientbanner,
session->serverbanner);
if (rc == SSH_ERROR) {
goto error;
}
ssh_string_free(num);
num = make_bignum_string(session->next_crypto->f);
if (num == NULL) {
goto error;
if (session->client) {
server_hash = session->in_hashbuf;
client_hash = session->out_hashbuf;
} else {
server_hash = session->out_hashbuf;
client_hash = session->in_hashbuf;
}
len = ssh_string_len(num) + 4;
if (buffer_add_data(buf, num, len) < 0) {
goto error;
/*
* Handle the two final fields for the KEXINIT message (RFC 4253 7.1):
*
* boolean first_kex_packet_follows
* uint32 0 (reserved for future extension)
*/
rc = buffer_add_u8(server_hash, 0);
if (rc < 0) {
goto error;
}
rc = buffer_add_u32(server_hash, 0);
if (rc < 0) {
goto error;
}
ssh_string_free(num);
/* These fields are handled for the server case in ssh_packet_kexinit. */
if (session->client) {
rc = buffer_add_u8(client_hash, 0);
if (rc < 0) {
goto error;
}
rc = buffer_add_u32(client_hash, 0);
if (rc < 0) {
goto error;
}
}
rc = ssh_buffer_pack(buf,
"dPdPS",
buffer_get_rest_len(client_hash),
buffer_get_rest_len(client_hash),
buffer_get_rest(client_hash),
buffer_get_rest_len(server_hash),
buffer_get_rest_len(server_hash),
buffer_get_rest(server_hash),
session->next_crypto->server_pubkey);
if(rc != SSH_OK){
goto error;
}
if (session->next_crypto->kex_type == SSH_KEX_DH_GROUP1_SHA1 ||
session->next_crypto->kex_type == SSH_KEX_DH_GROUP14_SHA1) {
rc = ssh_buffer_pack(buf,
"BB",
session->next_crypto->e,
session->next_crypto->f);
if (rc != SSH_OK) {
goto error;
}
#ifdef HAVE_ECDH
} else if (session->next_crypto->kex_type == SSH_KEX_ECDH_SHA2_NISTP256){
if(session->next_crypto->ecdh_client_pubkey == NULL ||
session->next_crypto->ecdh_server_pubkey == NULL){
SSH_LOG(SSH_LOG_WARNING, "ECDH parameted missing");
goto error;
}
rc = buffer_add_ssh_string(buf,session->next_crypto->ecdh_client_pubkey);
if (rc < 0) {
goto error;
}
rc = buffer_add_ssh_string(buf,session->next_crypto->ecdh_server_pubkey);
if (rc < 0) {
goto error;
}
} else if (session->next_crypto->kex_type == SSH_KEX_ECDH_SHA2_NISTP256) {
if (session->next_crypto->ecdh_client_pubkey == NULL ||
session->next_crypto->ecdh_server_pubkey == NULL) {
SSH_LOG(SSH_LOG_WARNING, "ECDH parameted missing");
goto error;
}
rc = ssh_buffer_pack(buf,
"SS",
session->next_crypto->ecdh_client_pubkey,
session->next_crypto->ecdh_server_pubkey);
if (rc != SSH_OK) {
goto error;
}
#endif
#ifdef HAVE_CURVE25519
} else if(session->next_crypto->kex_type == SSH_KEX_CURVE25519_SHA256_LIBSSH_ORG){
rc = buffer_add_u32(buf, htonl(CURVE25519_PUBKEY_SIZE));
rc += buffer_add_data(buf, session->next_crypto->curve25519_client_pubkey,
CURVE25519_PUBKEY_SIZE);
rc += buffer_add_u32(buf, htonl(CURVE25519_PUBKEY_SIZE));
rc += buffer_add_data(buf, session->next_crypto->curve25519_server_pubkey,
CURVE25519_PUBKEY_SIZE);
if (rc != SSH_OK) {
goto error;
}
#endif
}
num = make_bignum_string(session->next_crypto->k);
if (num == NULL) {
goto error;
}
} else if (session->next_crypto->kex_type == SSH_KEX_CURVE25519_SHA256_LIBSSH_ORG) {
rc = ssh_buffer_pack(buf,
"dPdP",
CURVE25519_PUBKEY_SIZE,
(size_t)CURVE25519_PUBKEY_SIZE, session->next_crypto->curve25519_client_pubkey,
CURVE25519_PUBKEY_SIZE,
(size_t)CURVE25519_PUBKEY_SIZE, session->next_crypto->curve25519_server_pubkey);
len = ssh_string_len(num) + 4;
if (buffer_add_data(buf, num, len) < 0) {
goto error;
}
if (rc != SSH_OK) {
goto error;
}
#endif
}
rc = ssh_buffer_pack(buf, "B", session->next_crypto->k);
if (rc != SSH_OK) {
goto error;
}
#ifdef DEBUG_CRYPTO
ssh_print_hexa("hash buffer", ssh_buffer_get_begin(buf), ssh_buffer_get_len(buf));
ssh_print_hexa("hash buffer", ssh_buffer_get_begin(buf), ssh_buffer_get_len(buf));
#endif
switch(session->next_crypto->kex_type){
switch (session->next_crypto->kex_type) {
case SSH_KEX_DH_GROUP1_SHA1:
case SSH_KEX_DH_GROUP14_SHA1:
session->next_crypto->digest_len = SHA_DIGEST_LENGTH;
session->next_crypto->mac_type = SSH_MAC_SHA1;
session->next_crypto->secret_hash = malloc(session->next_crypto->digest_len);
if(session->next_crypto->secret_hash == NULL){
ssh_set_error_oom(session);
goto error;
}
sha1(buffer_get_rest(buf), buffer_get_rest_len(buf),
session->next_crypto->secret_hash);
break;
session->next_crypto->digest_len = SHA_DIGEST_LENGTH;
session->next_crypto->mac_type = SSH_MAC_SHA1;
session->next_crypto->secret_hash = malloc(session->next_crypto->digest_len);
if (session->next_crypto->secret_hash == NULL) {
ssh_set_error_oom(session);
goto error;
}
sha1(buffer_get_rest(buf), buffer_get_rest_len(buf),
session->next_crypto->secret_hash);
break;
case SSH_KEX_ECDH_SHA2_NISTP256:
case SSH_KEX_CURVE25519_SHA256_LIBSSH_ORG:
session->next_crypto->digest_len = SHA256_DIGEST_LENGTH;
session->next_crypto->mac_type = SSH_MAC_SHA256;
session->next_crypto->secret_hash = malloc(session->next_crypto->digest_len);
if(session->next_crypto->secret_hash == NULL){
ssh_set_error_oom(session);
goto error;
}
sha256(buffer_get_rest(buf), buffer_get_rest_len(buf),
session->next_crypto->secret_hash);
break;
}
/* During the first kex, secret hash and session ID are equal. However, after
* a key re-exchange, a new secret hash is calculated. This hash will not replace
* but complement existing session id.
*/
if (!session->next_crypto->session_id){
session->next_crypto->session_id = malloc(session->next_crypto->digest_len);
if (session->next_crypto->session_id == NULL){
ssh_set_error_oom(session);
goto error;
}
memcpy(session->next_crypto->session_id, session->next_crypto->secret_hash,
session->next_crypto->digest_len);
}
session->next_crypto->digest_len = SHA256_DIGEST_LENGTH;
session->next_crypto->mac_type = SSH_MAC_SHA256;
session->next_crypto->secret_hash = malloc(session->next_crypto->digest_len);
if (session->next_crypto->secret_hash == NULL) {
ssh_set_error_oom(session);
goto error;
}
sha256(buffer_get_rest(buf), buffer_get_rest_len(buf),
session->next_crypto->secret_hash);
break;
}
/* During the first kex, secret hash and session ID are equal. However, after
* a key re-exchange, a new secret hash is calculated. This hash will not replace
* but complement existing session id.
*/
if (!session->next_crypto->session_id) {
session->next_crypto->session_id = malloc(session->next_crypto->digest_len);
if (session->next_crypto->session_id == NULL) {
ssh_set_error_oom(session);
goto error;
}
memcpy(session->next_crypto->session_id, session->next_crypto->secret_hash,
session->next_crypto->digest_len);
}
#ifdef DEBUG_CRYPTO
printf("Session hash: \n");
ssh_print_hexa("secret hash", session->next_crypto->secret_hash, session->next_crypto->digest_len);
ssh_print_hexa("session id", session->next_crypto->session_id, session->next_crypto->digest_len);
printf("Session hash: \n");
ssh_print_hexa("secret hash", session->next_crypto->secret_hash, session->next_crypto->digest_len);
ssh_print_hexa("session id", session->next_crypto->session_id, session->next_crypto->digest_len);
#endif
rc = SSH_OK;
rc = SSH_OK;
error:
ssh_buffer_free(buf);
ssh_buffer_free(client_hash);
ssh_buffer_free(server_hash);
ssh_buffer_free(buf);
ssh_buffer_free(client_hash);
ssh_buffer_free(server_hash);
session->in_hashbuf = NULL;
session->out_hashbuf = NULL;
session->in_hashbuf = NULL;
session->out_hashbuf = NULL;
ssh_string_free(str);
ssh_string_free(num);
ssh_string_free(num);
return rc;
return rc;
}
int hashbufout_add_cookie(ssh_session session) {
@ -808,20 +699,20 @@ int hashbufout_add_cookie(ssh_session session) {
}
if (buffer_add_u8(session->out_hashbuf, 20) < 0) {
buffer_reinit(session->out_hashbuf);
ssh_buffer_reinit(session->out_hashbuf);
return -1;
}
if (session->server) {
if (buffer_add_data(session->out_hashbuf,
if (ssh_buffer_add_data(session->out_hashbuf,
session->next_crypto->server_kex.cookie, 16) < 0) {
buffer_reinit(session->out_hashbuf);
ssh_buffer_reinit(session->out_hashbuf);
return -1;
}
} else {
if (buffer_add_data(session->out_hashbuf,
if (ssh_buffer_add_data(session->out_hashbuf,
session->next_crypto->client_kex.cookie, 16) < 0) {
buffer_reinit(session->out_hashbuf);
ssh_buffer_reinit(session->out_hashbuf);
return -1;
}
}
@ -836,11 +727,11 @@ int hashbufin_add_cookie(ssh_session session, unsigned char *cookie) {
}
if (buffer_add_u8(session->in_hashbuf, 20) < 0) {
buffer_reinit(session->in_hashbuf);
ssh_buffer_reinit(session->in_hashbuf);
return -1;
}
if (buffer_add_data(session->in_hashbuf,cookie, 16) < 0) {
buffer_reinit(session->in_hashbuf);
if (ssh_buffer_add_data(session->in_hashbuf,cookie, 16) < 0) {
ssh_buffer_reinit(session->in_hashbuf);
return -1;
}
@ -848,8 +739,10 @@ int hashbufin_add_cookie(ssh_session session, unsigned char *cookie) {
}
static int generate_one_key(ssh_string k,
struct ssh_crypto_struct *crypto, unsigned char *output, char letter) {
struct ssh_crypto_struct *crypto, unsigned char **output, char letter, size_t requested_size) {
ssh_mac_ctx ctx;
unsigned char *tmp;
size_t size = crypto->digest_len;
ctx=ssh_mac_ctx_init(crypto->mac_type);
if (ctx == NULL) {
@ -860,14 +753,32 @@ static int generate_one_key(ssh_string k,
ssh_mac_update(ctx, crypto->secret_hash, crypto->digest_len);
ssh_mac_update(ctx, &letter, 1);
ssh_mac_update(ctx, crypto->session_id, crypto->digest_len);
ssh_mac_final(output, ctx);
ssh_mac_final(*output, ctx);
while(requested_size > size) {
tmp = realloc(*output, size + crypto->digest_len);
if (tmp == NULL) {
return -1;
}
*output = tmp;
ctx = ssh_mac_ctx_init(crypto->mac_type);
if (ctx == NULL) {
return -1;
}
ssh_mac_update(ctx, k, ssh_string_len(k) + 4);
ssh_mac_update(ctx, crypto->secret_hash,
crypto->digest_len);
ssh_mac_update(ctx, tmp, size);
ssh_mac_final(tmp + size, ctx);
size += crypto->digest_len;
}
return 0;
}
int generate_session_keys(ssh_session session) {
ssh_string k_string = NULL;
ssh_mac_ctx ctx = NULL;
struct ssh_crypto_struct *crypto = session->next_crypto;
int rc = -1;
@ -892,88 +803,71 @@ int generate_session_keys(ssh_session session) {
/* IV */
if (session->client) {
if (generate_one_key(k_string, crypto, crypto->encryptIV, 'A') < 0) {
rc = generate_one_key(k_string, crypto, &crypto->encryptIV, 'A', crypto->digest_len);
if (rc < 0) {
goto error;
}
if (generate_one_key(k_string, crypto, crypto->decryptIV, 'B') < 0) {
rc = generate_one_key(k_string, crypto, &crypto->decryptIV, 'B', crypto->digest_len);
if (rc < 0) {
goto error;
}
} else {
if (generate_one_key(k_string, crypto, crypto->decryptIV, 'A') < 0) {
rc = generate_one_key(k_string, crypto, &crypto->decryptIV, 'A', crypto->digest_len);
if (rc < 0) {
goto error;
}
if (generate_one_key(k_string, crypto, crypto->encryptIV, 'B') < 0) {
rc = generate_one_key(k_string, crypto, &crypto->encryptIV, 'B', crypto->digest_len);
if (rc < 0) {
goto error;
}
}
if (session->client) {
if (generate_one_key(k_string, crypto, crypto->encryptkey, 'C') < 0) {
rc = generate_one_key(k_string, crypto, &crypto->encryptkey, 'C', crypto->out_cipher->keysize / 8);
if (rc < 0) {
goto error;
}
if (generate_one_key(k_string, crypto, crypto->decryptkey, 'D') < 0) {
rc = generate_one_key(k_string, crypto, &crypto->decryptkey, 'D', crypto->in_cipher->keysize / 8);
if (rc < 0) {
goto error;
}
} else {
if (generate_one_key(k_string, crypto, crypto->decryptkey, 'C') < 0) {
rc = generate_one_key(k_string, crypto, &crypto->decryptkey, 'C', crypto->in_cipher->keysize / 8);
if (rc < 0) {
goto error;
}
if (generate_one_key(k_string, crypto, crypto->encryptkey, 'D') < 0) {
rc = generate_one_key(k_string, crypto, &crypto->encryptkey, 'D', crypto->out_cipher->keysize / 8);
if (rc < 0) {
goto error;
}
}
/* some ciphers need more than DIGEST_LEN bytes of input key */
if (crypto->out_cipher->keysize > crypto->digest_len * 8) {
crypto->encryptkey = realloc(crypto->encryptkey, crypto->digest_len * 2);
if(crypto->encryptkey == NULL)
goto error;
ctx = ssh_mac_ctx_init(crypto->mac_type);
if (ctx == NULL) {
goto error;
}
ssh_mac_update(ctx, k_string, ssh_string_len(k_string) + 4);
ssh_mac_update(ctx, crypto->secret_hash,
crypto->digest_len);
ssh_mac_update(ctx, crypto->encryptkey, crypto->digest_len);
ssh_mac_final(crypto->encryptkey + crypto->digest_len, ctx);
}
if (crypto->in_cipher->keysize > crypto->digest_len * 8) {
crypto->decryptkey = realloc(crypto->decryptkey, crypto->digest_len *2);
if(crypto->decryptkey == NULL)
goto error;
ctx = ssh_mac_ctx_init(crypto->mac_type);
ssh_mac_update(ctx, k_string, ssh_string_len(k_string) + 4);
ssh_mac_update(ctx, crypto->secret_hash,
crypto->digest_len);
ssh_mac_update(ctx, crypto->decryptkey, crypto->digest_len);
ssh_mac_final(crypto->decryptkey + crypto->digest_len, ctx);
}
if(session->client) {
if (generate_one_key(k_string, crypto, crypto->encryptMAC, 'E') < 0) {
rc = generate_one_key(k_string, crypto, &crypto->encryptMAC, 'E', hmac_digest_len(crypto->out_hmac));
if (rc < 0) {
goto error;
}
if (generate_one_key(k_string, crypto, crypto->decryptMAC, 'F') < 0) {
rc = generate_one_key(k_string, crypto, &crypto->decryptMAC, 'F', hmac_digest_len(crypto->in_hmac));
if (rc < 0) {
goto error;
}
} else {
if (generate_one_key(k_string, crypto, crypto->decryptMAC, 'E') < 0) {
rc = generate_one_key(k_string, crypto, &crypto->decryptMAC, 'E', hmac_digest_len(crypto->in_hmac));
if (rc < 0) {
goto error;
}
if (generate_one_key(k_string, crypto, crypto->encryptMAC, 'F') < 0) {
rc = generate_one_key(k_string, crypto, &crypto->encryptMAC, 'F', hmac_digest_len(crypto->out_hmac));
if (rc < 0) {
goto error;
}
}
#ifdef DEBUG_CRYPTO
ssh_print_hexa("Encrypt IV", crypto->encryptIV, SHA_DIGEST_LEN);
ssh_print_hexa("Decrypt IV", crypto->decryptIV, SHA_DIGEST_LEN);
ssh_print_hexa("Encryption key", crypto->encryptkey,
crypto->out_cipher->keysize);
ssh_print_hexa("Decryption key", crypto->decryptkey,
crypto->in_cipher->keysize);
ssh_print_hexa("Encryption MAC", crypto->encryptMAC, SHA_DIGEST_LEN);
ssh_print_hexa("Decryption MAC", crypto->decryptMAC, 20);
ssh_print_hexa("Encrypt IV", crypto->encryptIV, crypto->digest_len);
ssh_print_hexa("Decrypt IV", crypto->decryptIV, crypto->digest_len);
ssh_print_hexa("Encryption key", crypto->encryptkey, crypto->out_cipher->keysize / 8);
ssh_print_hexa("Decryption key", crypto->decryptkey, crypto->in_cipher->keysize / 8);
ssh_print_hexa("Encryption MAC", crypto->encryptMAC, hmac_digest_len(crypto->out_hmac));
ssh_print_hexa("Decryption MAC", crypto->decryptMAC, hmac_digest_len(crypto->in_hmac));
#endif
rc = 0;

37
libssh/src/ecdh.c
View File

@ -1,7 +1,7 @@
/*
* This file is part of the SSH Library
*
* Copyright (c) 2011 by Aris Adamantiadis
* Copyright (c) 2011-2013 by Aris Adamantiadis
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -26,6 +26,7 @@
#include "libssh/buffer.h"
#include "libssh/ssh2.h"
#include "libssh/pki.h"
#include "libssh/bignum.h"
#ifdef HAVE_ECDH
#include <openssl/ecdh.h>
@ -154,7 +155,7 @@ static int ecdh_build_k(ssh_session session) {
return -1;
}
BN_bin2bn(buffer, len, session->next_crypto->k);
bignum_bin2bn(buffer, len, session->next_crypto->k);
free(buffer);
EC_KEY_free(session->next_crypto->ecdh_privkey);
@ -285,12 +286,6 @@ int ssh_server_ecdh_init(ssh_session session, ssh_buffer packet){
session->next_crypto->ecdh_privkey = ecdh_key;
session->next_crypto->ecdh_server_pubkey = q_s_string;
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_KEXDH_REPLY);
if (rc < 0) {
ssh_set_error_oom(session);
return SSH_ERROR;
}
/* build k and session_id */
rc = ecdh_build_k(session);
if (rc < 0) {
@ -310,30 +305,22 @@ int ssh_server_ecdh_init(ssh_session session, ssh_buffer packet){
return SSH_ERROR;
}
/* add host's public key */
rc = buffer_add_ssh_string(session->out_buffer,
session->next_crypto->server_pubkey);
if (rc < 0) {
ssh_set_error_oom(session);
return SSH_ERROR;
}
/* add ecdh public key */
rc = buffer_add_ssh_string(session->out_buffer, q_s_string);
if (rc < 0) {
ssh_set_error_oom(session);
return SSH_ERROR;
}
/* add signature blob */
sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey);
if (sig_blob == NULL) {
ssh_set_error(session, SSH_FATAL, "Could not sign the session id");
return SSH_ERROR;
}
rc = buffer_add_ssh_string(session->out_buffer, sig_blob);
rc = ssh_buffer_pack(session->out_buffer,
"bSSS",
SSH2_MSG_KEXDH_REPLY,
session->next_crypto->server_pubkey, /* host's pubkey */
q_s_string, /* ecdh public key */
sig_blob); /* signature blob */
ssh_string_free(sig_blob);
if (rc < 0) {
if (rc != SSH_OK) {
ssh_set_error_oom(session);
return SSH_ERROR;
}

222
libssh/src/ed25519.c Normal file
View File

@ -0,0 +1,222 @@
/* $OpenBSD: ed25519.c,v 1.3 2013/12/09 11:03:45 markus Exp $ */
/*
* Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange,
* Peter Schwabe, Bo-Yin Yang.
* Copied from supercop-20130419/crypto_sign/ed25519/ref/ed25519.c
*/
#include "config.h"
#include "libssh/libcrypto.h"
#include "libssh/wrapper.h"
#include "libssh/ge25519.h"
#include "libssh/sc25519.h"
#include "libssh/ed25519.h"
/*
* Public Domain, Author: Daniel J. Bernstein
* Copied from nacl-20110221/crypto_verify/32/ref/verify.c
*/
static int crypto_verify_32(const unsigned char *x,const unsigned char *y)
{
unsigned int differentbits = 0;
#define F(i) differentbits |= x[i] ^ y[i];
F(0)
F(1)
F(2)
F(3)
F(4)
F(5)
F(6)
F(7)
F(8)
F(9)
F(10)
F(11)
F(12)
F(13)
F(14)
F(15)
F(16)
F(17)
F(18)
F(19)
F(20)
F(21)
F(22)
F(23)
F(24)
F(25)
F(26)
F(27)
F(28)
F(29)
F(30)
F(31)
return (1 & ((differentbits - 1) >> 8)) - 1;
}
static void get_hram(unsigned char *hram,
const unsigned char *sm,
const unsigned char *pk,
unsigned char *playground,
unsigned long long smlen)
{
unsigned long long i;
SHA512CTX ctx;
for (i = 0;i < 32;++i) playground[i] = sm[i];
for (i = 32;i < 64;++i) playground[i] = pk[i-32];
for (i = 64;i < smlen;++i) playground[i] = sm[i];
ctx = sha512_init();
sha512_update(ctx, playground, smlen);
sha512_final(hram, ctx);
}
int crypto_sign_ed25519_keypair(unsigned char *pk,
unsigned char *sk)
{
sc25519 scsk;
ge25519 gepk;
SHA512CTX ctx;
unsigned char extsk[64];
int i;
int rc;
rc = ssh_get_random(sk, 32, 0);
if (rc < 0){
return -1;
}
ctx = sha512_init();
sha512_update(ctx, sk, 32);
sha512_final(extsk, ctx);
extsk[0] &= 248;
extsk[31] &= 127;
extsk[31] |= 64;
sc25519_from32bytes(&scsk,extsk);
ge25519_scalarmult_base(&gepk, &scsk);
ge25519_pack(pk, &gepk);
for(i=0;i<32;i++) {
sk[32 + i] = pk[i];
}
return 0;
}
int crypto_sign_ed25519(unsigned char *sm,
unsigned long long *smlen,
const unsigned char *m,
unsigned long long mlen,
const unsigned char *sk)
{
sc25519 sck, scs, scsk;
ge25519 ger;
SHA512CTX ctx;
unsigned char r[32];
unsigned char s[32];
unsigned char extsk[64];
unsigned long long i;
unsigned char hmg[SHA512_DIGEST_LEN];
unsigned char hram[SHA512_DIGEST_LEN];
ctx = sha512_init();
sha512_update(ctx, sk, 32);
sha512_final(extsk, ctx);
extsk[0] &= 248;
extsk[31] &= 127;
extsk[31] |= 64;
*smlen = mlen + 64;
for (i = 0;i < mlen; i++) {
sm[64 + i] = m[i];
}
for (i = 0;i < 32; i++) {
sm[32 + i] = extsk[32+i];
}
/* Generate k as h(extsk[32],...,extsk[63],m) */
ctx = sha512_init();
sha512_update(ctx, sm + 32, mlen + 32);
sha512_final(hmg, ctx);
/* Computation of R */
sc25519_from64bytes(&sck, hmg);
ge25519_scalarmult_base(&ger, &sck);
ge25519_pack(r, &ger);
/* Computation of s */
for (i = 0; i < 32; i++) {
sm[i] = r[i];
}
get_hram(hram, sm, sk+32, sm, mlen+64);
sc25519_from64bytes(&scs, hram);
sc25519_from32bytes(&scsk, extsk);
sc25519_mul(&scs, &scs, &scsk);
sc25519_add(&scs, &scs, &sck);
sc25519_to32bytes(s,&scs); /* cat s */
for (i = 0;i < 32; i++) {
sm[32 + i] = s[i];
}
return 0;
}
int crypto_sign_ed25519_open(unsigned char *m,
unsigned long long *mlen,
const unsigned char *sm,
unsigned long long smlen,
const unsigned char *pk)
{
unsigned int i;
int ret;
unsigned char t2[32];
ge25519 get1, get2;
sc25519 schram, scs;
unsigned char hram[SHA512_DIGEST_LEN];
*mlen = (unsigned long long) -1;
if (smlen < 64) return -1;
if (ge25519_unpackneg_vartime(&get1, pk)) {
return -1;
}
get_hram(hram,sm,pk,m,smlen);
sc25519_from64bytes(&schram, hram);
sc25519_from32bytes(&scs, sm+32);
ge25519_double_scalarmult_vartime(&get2,
&get1,
&schram,
&ge25519_base,
&scs);
ge25519_pack(t2, &get2);
ret = crypto_verify_32(sm, t2);
if (ret != 0) {
for (i = 0; i < smlen - 64; i++) {
m[i] = sm[i + 64];
}
*mlen = smlen-64;
} else {
for (i = 0; i < smlen - 64; i++) {
m[i] = 0;
}
}
return ret;
}

4
libssh/src/error.c
View File

@ -104,7 +104,7 @@ void _ssh_set_error_invalid(void *error, const char *function)
/**
* @brief Retrieve the error text message from the last error.
*
* @param error The SSH session pointer.
* @param error An ssh_session or ssh_bind.
*
* @return A static string describing the error.
*/
@ -117,7 +117,7 @@ const char *ssh_get_error(void *error) {
/**
* @brief Retrieve the error code from the last error.
*
* @param error The SSH session pointer.
* @param error An ssh_session or ssh_bind.
*
* \return SSH_NO_ERROR No error occurred\n
* SSH_REQUEST_DENIED The last request was denied but situation is

416
libssh/src/fe25519.c Normal file
View File

@ -0,0 +1,416 @@
/*
* Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange,
* Peter Schwabe, Bo-Yin Yang.
* Copied from supercop-20130419/crypto_sign/ed25519/ref/fe25519.c
*/
#define WINDOWSIZE 1 /* Should be 1,2, or 4 */
#define WINDOWMASK ((1<<WINDOWSIZE)-1)
#include "libssh/fe25519.h"
static uint32_t equal(uint32_t a,uint32_t b) /* 16-bit inputs */
{
uint32_t x = a ^ b; /* 0: yes; 1..65535: no */
x -= 1; /* 4294967295: yes; 0..65534: no */
x >>= 31; /* 1: yes; 0: no */
return x;
}
static uint32_t ge(uint32_t a,uint32_t b) /* 16-bit inputs */
{
unsigned int x = a;
x -= (unsigned int) b; /* 0..65535: yes; 4294901761..4294967295: no */
x >>= 31; /* 0: yes; 1: no */
x ^= 1; /* 1: yes; 0: no */
return x;
}
static uint32_t times19(uint32_t a)
{
return (a << 4) + (a << 1) + a;
}
static uint32_t times38(uint32_t a)
{
return (a << 5) + (a << 2) + (a << 1);
}
static void reduce_add_sub(fe25519 *r)
{
uint32_t t;
int i,rep;
for(rep = 0; rep < 4; rep++) {
t = r->v[31] >> 7;
r->v[31] &= 127;
t = times19(t);
r->v[0] += t;
for(i = 0; i < 31; i++) {
t = r->v[i] >> 8;
r->v[i+1] += t;
r->v[i] &= 255;
}
}
}
static void reduce_mul(fe25519 *r)
{
uint32_t t;
int i,rep;
for(rep = 0; rep < 2; rep++) {
t = r->v[31] >> 7;
r->v[31] &= 127;
t = times19(t);
r->v[0] += t;
for(i = 0; i < 31; i++) {
t = r->v[i] >> 8;
r->v[i+1] += t;
r->v[i] &= 255;
}
}
}
/* reduction modulo 2^255-19 */
void fe25519_freeze(fe25519 *r)
{
int i;
uint32_t m = equal(r->v[31],127);
for (i = 30; i > 0; i--) {
m &= equal(r->v[i],255);
}
m &= ge(r->v[0],237);
m = -m;
r->v[31] -= m&127;
for (i = 30; i > 0; i--) {
r->v[i] -= m&255;
}
r->v[0] -= m&237;
}
void fe25519_unpack(fe25519 *r, const unsigned char x[32])
{
int i;
for (i = 0;i < 32; i++) {
r->v[i] = x[i];
}
r->v[31] &= 127;
}
/* Assumes input x being reduced below 2^255 */
void fe25519_pack(unsigned char r[32], const fe25519 *x)
{
int i;
fe25519 y = *x;
fe25519_freeze(&y);
for (i = 0; i < 32; i++) {
r[i] = y.v[i];
}
}
int fe25519_iszero(const fe25519 *x)
{
int i;
int r;
fe25519 t = *x;
fe25519_freeze(&t);
r = equal(t.v[0],0);
for (i = 1; i < 32; i++) {
r &= equal(t.v[i],0);
}
return r;
}
int fe25519_iseq_vartime(const fe25519 *x, const fe25519 *y)
{
int i;
fe25519 t1 = *x;
fe25519 t2 = *y;
fe25519_freeze(&t1);
fe25519_freeze(&t2);
for (i = 0; i < 32; i++) {
if(t1.v[i] != t2.v[i]) {
return 0;
}
}
return 1;
}
void fe25519_cmov(fe25519 *r, const fe25519 *x, unsigned char b)
{
int i;
uint32_t mask = b;
mask = -mask;
for (i = 0; i < 32; i++) {
r->v[i] ^= mask & (x->v[i] ^ r->v[i]);
}
}
unsigned char fe25519_getparity(const fe25519 *x)
{
fe25519 t = *x;
fe25519_freeze(&t);
return t.v[0] & 1;
}
void fe25519_setone(fe25519 *r)
{
int i;
r->v[0] = 1;
for (i = 1; i < 32; i++) {
r->v[i]=0;
}
}
void fe25519_setzero(fe25519 *r)
{
int i;
for (i = 0; i < 32; i++) {
r->v[i]=0;
}
}
void fe25519_neg(fe25519 *r, const fe25519 *x)
{
fe25519 t;
int i;
for (i = 0; i < 32; i++) {
t.v[i]=x->v[i];
}
fe25519_setzero(r);
fe25519_sub(r, r, &t);
}
void fe25519_add(fe25519 *r, const fe25519 *x, const fe25519 *y)
{
int i;
for (i = 0; i < 32; i++) {
r->v[i] = x->v[i] + y->v[i];
}
reduce_add_sub(r);
}
void fe25519_sub(fe25519 *r, const fe25519 *x, const fe25519 *y)
{
int i;
uint32_t t[32];
t[0] = x->v[0] + 0x1da;
t[31] = x->v[31] + 0xfe;
for (i = 1; i < 31; i++) {
t[i] = x->v[i] + 0x1fe;
}
for (i = 0; i < 32; i++) {
r->v[i] = t[i] - y->v[i];
}
reduce_add_sub(r);
}
void fe25519_mul(fe25519 *r, const fe25519 *x, const fe25519 *y)
{
int i,j;
uint32_t t[63];
for (i = 0; i < 63; i++) {
t[i] = 0;
}
for (i = 0; i < 32; i++) {
for (j = 0; j < 32; j++) {
t[i+j] += x->v[i] * y->v[j];
}
}
for (i = 32; i < 63; i++) {
r->v[i-32] = t[i-32] + times38(t[i]);
}
r->v[31] = t[31]; /* result now in r[0]...r[31] */
reduce_mul(r);
}
void fe25519_square(fe25519 *r, const fe25519 *x)
{
fe25519_mul(r, x, x);
}
void fe25519_invert(fe25519 *r, const fe25519 *x)
{
fe25519 z2;
fe25519 z9;
fe25519 z11;
fe25519 z2_5_0;
fe25519 z2_10_0;
fe25519 z2_20_0;
fe25519 z2_50_0;
fe25519 z2_100_0;
fe25519 t0;
fe25519 t1;
int i;
/* 2 */ fe25519_square(&z2, x);
/* 4 */ fe25519_square(&t1, &z2);
/* 8 */ fe25519_square(&t0, &t1);
/* 9 */ fe25519_mul(&z9, &t0, x);
/* 11 */ fe25519_mul(&z11, &z9, &z2);
/* 22 */ fe25519_square(&t0, &z11);
/* 2^5 - 2^0 = 31 */ fe25519_mul(&z2_5_0, &t0, &z9);
/* 2^6 - 2^1 */ fe25519_square(&t0, &z2_5_0);
/* 2^7 - 2^2 */ fe25519_square(&t1, &t0);
/* 2^8 - 2^3 */ fe25519_square(&t0, &t1);
/* 2^9 - 2^4 */ fe25519_square(&t1, &t0);
/* 2^10 - 2^5 */ fe25519_square(&t0, &t1);
/* 2^10 - 2^0 */ fe25519_mul(&z2_10_0, &t0, &z2_5_0);
/* 2^11 - 2^1 */ fe25519_square(&t0, &z2_10_0);
/* 2^12 - 2^2 */ fe25519_square(&t1, &t0);
/* 2^20 - 2^10 */ for (i = 2;i < 10;i += 2) {
fe25519_square(&t0, &t1);
fe25519_square(&t1, &t0);
}
/* 2^20 - 2^0 */ fe25519_mul(&z2_20_0, &t1, &z2_10_0);
/* 2^21 - 2^1 */ fe25519_square(&t0, &z2_20_0);
/* 2^22 - 2^2 */ fe25519_square(&t1, &t0);
/* 2^40 - 2^20 */ for (i = 2;i < 20;i += 2) {
fe25519_square(&t0, &t1);
fe25519_square(&t1,&t0);
}
/* 2^40 - 2^0 */ fe25519_mul(&t0, &t1, &z2_20_0);
/* 2^41 - 2^1 */ fe25519_square(&t1, &t0);
/* 2^42 - 2^2 */ fe25519_square(&t0, &t1);
/* 2^50 - 2^10 */ for (i = 2; i < 10;i += 2) {
fe25519_square(&t1, &t0);
fe25519_square(&t0, &t1);
}
/* 2^50 - 2^0 */ fe25519_mul(&z2_50_0,&t0,&z2_10_0);
/* 2^51 - 2^1 */ fe25519_square(&t0, &z2_50_0);
/* 2^52 - 2^2 */ fe25519_square(&t1, &t0);
/* 2^100 - 2^50 */ for (i = 2; i < 50; i += 2) {
fe25519_square(&t0, &t1);
fe25519_square(&t1,&t0);
}
/* 2^100 - 2^0 */ fe25519_mul(&z2_100_0, &t1, &z2_50_0);
/* 2^101 - 2^1 */ fe25519_square(&t1, &z2_100_0);
/* 2^102 - 2^2 */ fe25519_square(&t0, &t1);
/* 2^200 - 2^100 */ for (i = 2; i < 100; i += 2) {
fe25519_square(&t1, &t0);
fe25519_square(&t0,&t1);
}
/* 2^200 - 2^0 */ fe25519_mul(&t1, &t0, &z2_100_0);
/* 2^201 - 2^1 */ fe25519_square(&t0, &t1);
/* 2^202 - 2^2 */ fe25519_square(&t1, &t0);
/* 2^250 - 2^50 */ for (i = 2;i < 50;i += 2) {
fe25519_square(&t0, &t1);
fe25519_square(&t1,&t0);
}
/* 2^250 - 2^0 */ fe25519_mul(&t0, &t1, &z2_50_0);
/* 2^251 - 2^1 */ fe25519_square(&t1, &t0);
/* 2^252 - 2^2 */ fe25519_square(&t0, &t1);
/* 2^253 - 2^3 */ fe25519_square(&t1, &t0);
/* 2^254 - 2^4 */ fe25519_square(&t0, &t1);
/* 2^255 - 2^5 */ fe25519_square(&t1, &t0);
/* 2^255 - 21 */ fe25519_mul(r, &t1, &z11);
}
void fe25519_pow2523(fe25519 *r, const fe25519 *x)
{
fe25519 z2;
fe25519 z9;
fe25519 z11;
fe25519 z2_5_0;
fe25519 z2_10_0;
fe25519 z2_20_0;
fe25519 z2_50_0;
fe25519 z2_100_0;
fe25519 t;
int i;
/* 2 */ fe25519_square(&z2, x);
/* 4 */ fe25519_square(&t, &z2);
/* 8 */ fe25519_square(&t, &t);
/* 9 */ fe25519_mul(&z9, &t, x);
/* 11 */ fe25519_mul(&z11, &z9, &z2);
/* 22 */ fe25519_square(&t, &z11);
/* 2^5 - 2^0 = 31 */ fe25519_mul(&z2_5_0, &t, &z9);
/* 2^6 - 2^1 */ fe25519_square(&t, &z2_5_0);
/* 2^10 - 2^5 */ for (i = 1; i < 5; i++) {
fe25519_square(&t,&t);
}
/* 2^10 - 2^0 */ fe25519_mul(&z2_10_0, &t, &z2_5_0);
/* 2^11 - 2^1 */ fe25519_square(&t, &z2_10_0);
/* 2^20 - 2^10 */ for (i = 1; i < 10; i++) {
fe25519_square(&t, &t);
}
/* 2^20 - 2^0 */ fe25519_mul(&z2_20_0, &t, &z2_10_0);
/* 2^21 - 2^1 */ fe25519_square(&t, &z2_20_0);
/* 2^40 - 2^20 */ for (i = 1; i < 20; i++) {
fe25519_square(&t,&t);
}
/* 2^40 - 2^0 */ fe25519_mul(&t, &t, &z2_20_0);
/* 2^41 - 2^1 */ fe25519_square(&t, &t);
/* 2^50 - 2^10 */ for (i = 1; i < 10; i++) {
fe25519_square(&t,&t);
}
/* 2^50 - 2^0 */ fe25519_mul(&z2_50_0, &t, &z2_10_0);
/* 2^51 - 2^1 */ fe25519_square(&t, &z2_50_0);
/* 2^100 - 2^50 */ for (i = 1; i < 50; i++) {
fe25519_square(&t, &t);
}
/* 2^100 - 2^0 */ fe25519_mul(&z2_100_0, &t, &z2_50_0);
/* 2^101 - 2^1 */ fe25519_square(&t, &z2_100_0);
/* 2^200 - 2^100 */ for (i = 1; i < 100; i++) {
fe25519_square(&t, &t);
}
/* 2^200 - 2^0 */ fe25519_mul(&t, &t, &z2_100_0);
/* 2^201 - 2^1 */ fe25519_square(&t, &t);
/* 2^250 - 2^50 */ for (i = 1; i < 50; i++) {
fe25519_square(&t, &t);
}
/* 2^250 - 2^0 */ fe25519_mul(&t, &t, &z2_50_0);
/* 2^251 - 2^1 */ fe25519_square(&t, &t);
/* 2^252 - 2^2 */ fe25519_square(&t, &t);
/* 2^252 - 3 */ fe25519_mul(r, &t, x);
}

367
libssh/src/ge25519.c Normal file
View File

@ -0,0 +1,367 @@
/* $OpenBSD: ge25519.c,v 1.3 2013/12/09 11:03:45 markus Exp $ */
/*
* Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange,
* Peter Schwabe, Bo-Yin Yang.
* Copied from supercop-20130419/crypto_sign/ed25519/ref/ge25519.c
*/
#include "libssh/fe25519.h"
#include "libssh/sc25519.h"
#include "libssh/ge25519.h"
/*
* Arithmetic on the twisted Edwards curve -x^2 + y^2 = 1 + dx^2y^2
* with d = -(121665/121666) = 37095705934669439343138083508754565189542113879843219016388785533085940283555
* Base point: (15112221349535400772501151409588531511454012693041857206046113283949847762202,46316835694926478169428394003475163141307993866256225615783033603165251855960);
*/
/* d */
static const fe25519 ge25519_ecd = {
{0xA3, 0x78, 0x59, 0x13, 0xCA, 0x4D, 0xEB, 0x75,
0xAB, 0xD8, 0x41, 0x41, 0x4D, 0x0A, 0x70, 0x00,
0x98, 0xE8, 0x79, 0x77, 0x79, 0x40, 0xC7, 0x8C,
0x73, 0xFE, 0x6F, 0x2B, 0xEE, 0x6C, 0x03, 0x52}
};
/* 2*d */
static const fe25519 ge25519_ec2d = {
{0x59, 0xF1, 0xB2, 0x26, 0x94, 0x9B, 0xD6, 0xEB,
0x56, 0xB1, 0x83, 0x82, 0x9A, 0x14, 0xE0, 0x00,
0x30, 0xD1, 0xF3, 0xEE, 0xF2, 0x80, 0x8E, 0x19,
0xE7, 0xFC, 0xDF, 0x56, 0xDC, 0xD9, 0x06, 0x24}
};
/* sqrt(-1) */
static const fe25519 ge25519_sqrtm1 = {
{0xB0, 0xA0, 0x0E, 0x4A, 0x27, 0x1B, 0xEE, 0xC4,
0x78, 0xE4, 0x2F, 0xAD, 0x06, 0x18, 0x43, 0x2F,
0xA7, 0xD7, 0xFB, 0x3D, 0x99, 0x00, 0x4D, 0x2B,
0x0B, 0xDF, 0xC1, 0x4F, 0x80, 0x24, 0x83, 0x2B}
};
#define ge25519_p3 ge25519
typedef struct {
fe25519 x;
fe25519 z;
fe25519 y;
fe25519 t;
} ge25519_p1p1;
typedef struct {
fe25519 x;
fe25519 y;
fe25519 z;
} ge25519_p2;
typedef struct {
fe25519 x;
fe25519 y;
} ge25519_aff;
/* Packed coordinates of the base point */
const ge25519 ge25519_base = {
{{0x1A, 0xD5, 0x25, 0x8F, 0x60, 0x2D, 0x56, 0xC9,
0xB2, 0xA7, 0x25, 0x95, 0x60, 0xC7, 0x2C, 0x69,
0x5C, 0xDC, 0xD6, 0xFD, 0x31, 0xE2, 0xA4, 0xC0,
0xFE, 0x53, 0x6E, 0xCD, 0xD3, 0x36, 0x69, 0x21}},
{{0x58, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66,
0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66,
0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66,
0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66}},
{{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
{{0xA3, 0xDD, 0xB7, 0xA5, 0xB3, 0x8A, 0xDE, 0x6D,
0xF5, 0x52, 0x51, 0x77, 0x80, 0x9F, 0xF0, 0x20,
0x7D, 0xE3, 0xAB, 0x64, 0x8E, 0x4E, 0xEA, 0x66,
0x65, 0x76, 0x8B, 0xD7, 0x0F, 0x5F, 0x87, 0x67}}
};
/* Multiples of the base point in affine representation */
static const ge25519_aff ge25519_base_multiples_affine[425] = {
#include "ge25519_base.data"
};
static void p1p1_to_p2(ge25519_p2 *r, const ge25519_p1p1 *p)
{
fe25519_mul(&r->x, &p->x, &p->t);
fe25519_mul(&r->y, &p->y, &p->z);
fe25519_mul(&r->z, &p->z, &p->t);
}
static void p1p1_to_p3(ge25519_p3 *r, const ge25519_p1p1 *p)
{
p1p1_to_p2((ge25519_p2 *)r, p);
fe25519_mul(&r->t, &p->x, &p->y);
}
static void ge25519_mixadd2(ge25519_p3 *r, const ge25519_aff *q)
{
fe25519 a,b,t1,t2,c,d,e,f,g,h,qt;
fe25519_mul(&qt, &q->x, &q->y);
fe25519_sub(&a, &r->y, &r->x); /* A = (Y1-X1)*(Y2-X2) */
fe25519_add(&b, &r->y, &r->x); /* B = (Y1+X1)*(Y2+X2) */
fe25519_sub(&t1, &q->y, &q->x);
fe25519_add(&t2, &q->y, &q->x);
fe25519_mul(&a, &a, &t1);
fe25519_mul(&b, &b, &t2);
fe25519_sub(&e, &b, &a); /* E = B-A */
fe25519_add(&h, &b, &a); /* H = B+A */
fe25519_mul(&c, &r->t, &qt); /* C = T1*k*T2 */
fe25519_mul(&c, &c, &ge25519_ec2d);
fe25519_add(&d, &r->z, &r->z); /* D = Z1*2 */
fe25519_sub(&f, &d, &c); /* F = D-C */
fe25519_add(&g, &d, &c); /* G = D+C */
fe25519_mul(&r->x, &e, &f);
fe25519_mul(&r->y, &h, &g);
fe25519_mul(&r->z, &g, &f);
fe25519_mul(&r->t, &e, &h);
}
static void add_p1p1(ge25519_p1p1 *r, const ge25519_p3 *p, const ge25519_p3 *q)
{
fe25519 a, b, c, d, t;
fe25519_sub(&a, &p->y, &p->x); /* A = (Y1-X1)*(Y2-X2) */
fe25519_sub(&t, &q->y, &q->x);
fe25519_mul(&a, &a, &t);
fe25519_add(&b, &p->x, &p->y); /* B = (Y1+X1)*(Y2+X2) */
fe25519_add(&t, &q->x, &q->y);
fe25519_mul(&b, &b, &t);
fe25519_mul(&c, &p->t, &q->t); /* C = T1*k*T2 */
fe25519_mul(&c, &c, &ge25519_ec2d);
fe25519_mul(&d, &p->z, &q->z); /* D = Z1*2*Z2 */
fe25519_add(&d, &d, &d);
fe25519_sub(&r->x, &b, &a); /* E = B-A */
fe25519_sub(&r->t, &d, &c); /* F = D-C */
fe25519_add(&r->z, &d, &c); /* G = D+C */
fe25519_add(&r->y, &b, &a); /* H = B+A */
}
/* See http://www.hyperelliptic.org/EFD/g1p/auto-twisted-extended-1.html#doubling-dbl-2008-hwcd */
static void dbl_p1p1(ge25519_p1p1 *r, const ge25519_p2 *p)
{
fe25519 a,b,c,d;
fe25519_square(&a, &p->x);
fe25519_square(&b, &p->y);
fe25519_square(&c, &p->z);
fe25519_add(&c, &c, &c);
fe25519_neg(&d, &a);
fe25519_add(&r->x, &p->x, &p->y);
fe25519_square(&r->x, &r->x);
fe25519_sub(&r->x, &r->x, &a);
fe25519_sub(&r->x, &r->x, &b);
fe25519_add(&r->z, &d, &b);
fe25519_sub(&r->t, &r->z, &c);
fe25519_sub(&r->y, &d, &b);
}
/* Constant-time version of: if(b) r = p */
static void cmov_aff(ge25519_aff *r, const ge25519_aff *p, unsigned char b)
{
fe25519_cmov(&r->x, &p->x, b);
fe25519_cmov(&r->y, &p->y, b);
}
static unsigned char equal(signed char b,signed char c)
{
unsigned char ub = b;
unsigned char uc = c;
unsigned char x = ub ^ uc; /* 0: yes; 1..255: no */
uint32_t y = x; /* 0: yes; 1..255: no */
y -= 1; /* 4294967295: yes; 0..254: no */
y >>= 31; /* 1: yes; 0: no */
return y;
}
static unsigned char negative(signed char b)
{
unsigned long long x = b; /* 18446744073709551361..18446744073709551615: yes; 0..255: no */
x >>= 63; /* 1: yes; 0: no */
return x;
}
static void choose_t(ge25519_aff *t, unsigned long long pos, signed char b)
{
/* constant time */
fe25519 v;
*t = ge25519_base_multiples_affine[5 * pos + 0];
cmov_aff(t, &ge25519_base_multiples_affine[5 * pos + 1],
equal(b,1) | equal(b,-1));
cmov_aff(t, &ge25519_base_multiples_affine[5 * pos + 2],
equal(b,2) | equal(b,-2));
cmov_aff(t, &ge25519_base_multiples_affine[5 * pos + 3],
equal(b,3) | equal(b,-3));
cmov_aff(t, &ge25519_base_multiples_affine[5 * pos + 4],
equal(b,-4));
fe25519_neg(&v, &t->x);
fe25519_cmov(&t->x, &v, negative(b));
}
static void setneutral(ge25519 *r)
{
fe25519_setzero(&r->x);
fe25519_setone(&r->y);
fe25519_setone(&r->z);
fe25519_setzero(&r->t);
}
/* ********************************************************************
* EXPORTED FUNCTIONS
******************************************************************** */
/* return 0 on success, -1 otherwise */
int ge25519_unpackneg_vartime(ge25519_p3 *r, const unsigned char p[32])
{
unsigned char par;
fe25519 t, chk, num, den, den2, den4, den6;
fe25519_setone(&r->z);
par = p[31] >> 7;
fe25519_unpack(&r->y, p);
fe25519_square(&num, &r->y); /* x = y^2 */
fe25519_mul(&den, &num, &ge25519_ecd); /* den = dy^2 */
fe25519_sub(&num, &num, &r->z); /* x = y^2-1 */
fe25519_add(&den, &r->z, &den); /* den = dy^2+1 */
/* Computation of sqrt(num/den) */
/* 1.: computation of num^((p-5)/8)*den^((7p-35)/8) = (num*den^7)^((p-5)/8) */
fe25519_square(&den2, &den);
fe25519_square(&den4, &den2);
fe25519_mul(&den6, &den4, &den2);
fe25519_mul(&t, &den6, &num);
fe25519_mul(&t, &t, &den);
fe25519_pow2523(&t, &t);
/* 2. computation of r->x = t * num * den^3 */
fe25519_mul(&t, &t, &num);
fe25519_mul(&t, &t, &den);
fe25519_mul(&t, &t, &den);
fe25519_mul(&r->x, &t, &den);
/* 3. Check whether sqrt computation gave correct result, multiply by sqrt(-1) if not: */
fe25519_square(&chk, &r->x);
fe25519_mul(&chk, &chk, &den);
if (!fe25519_iseq_vartime(&chk, &num)) {
fe25519_mul(&r->x, &r->x, &ge25519_sqrtm1);
}
/* 4. Now we have one of the two square roots, except if input was not a square */
fe25519_square(&chk, &r->x);
fe25519_mul(&chk, &chk, &den);
if (!fe25519_iseq_vartime(&chk, &num)) {
return -1;
}
/* 5. Choose the desired square root according to parity: */
if(fe25519_getparity(&r->x) != (1-par)) {
fe25519_neg(&r->x, &r->x);
}
fe25519_mul(&r->t, &r->x, &r->y);
return 0;
}
void ge25519_pack(unsigned char r[32], const ge25519_p3 *p)
{
fe25519 tx, ty, zi;
fe25519_invert(&zi, &p->z);
fe25519_mul(&tx, &p->x, &zi);
fe25519_mul(&ty, &p->y, &zi);
fe25519_pack(r, &ty);
r[31] ^= fe25519_getparity(&tx) << 7;
}
int ge25519_isneutral_vartime(const ge25519_p3 *p)
{
int ret = 1;
if (!fe25519_iszero(&p->x)) {
ret = 0;
}
if (!fe25519_iseq_vartime(&p->y, &p->z)) {
ret = 0;
}
return ret;
}
/* computes [s1]p1 + [s2]p2 */
void ge25519_double_scalarmult_vartime(ge25519_p3 *r, const ge25519_p3 *p1, const sc25519 *s1, const ge25519_p3 *p2, const sc25519 *s2)
{
ge25519_p1p1 tp1p1;
ge25519_p3 pre[16];
unsigned char b[127];
int i;
/* precomputation s2 s1 */
setneutral(pre); /* 00 00 */
pre[1] = *p1; /* 00 01 */
dbl_p1p1(&tp1p1,(ge25519_p2 *)p1); p1p1_to_p3( &pre[2], &tp1p1); /* 00 10 */
add_p1p1(&tp1p1,&pre[1], &pre[2]); p1p1_to_p3( &pre[3], &tp1p1); /* 00 11 */
pre[4] = *p2; /* 01 00 */
add_p1p1(&tp1p1,&pre[1], &pre[4]); p1p1_to_p3( &pre[5], &tp1p1); /* 01 01 */
add_p1p1(&tp1p1,&pre[2], &pre[4]); p1p1_to_p3( &pre[6], &tp1p1); /* 01 10 */
add_p1p1(&tp1p1,&pre[3], &pre[4]); p1p1_to_p3( &pre[7], &tp1p1); /* 01 11 */
dbl_p1p1(&tp1p1,(ge25519_p2 *)p2); p1p1_to_p3( &pre[8], &tp1p1); /* 10 00 */
add_p1p1(&tp1p1,&pre[1], &pre[8]); p1p1_to_p3( &pre[9], &tp1p1); /* 10 01 */
dbl_p1p1(&tp1p1,(ge25519_p2 *)&pre[5]); p1p1_to_p3(&pre[10], &tp1p1); /* 10 10 */
add_p1p1(&tp1p1,&pre[3], &pre[8]); p1p1_to_p3(&pre[11], &tp1p1); /* 10 11 */
add_p1p1(&tp1p1,&pre[4], &pre[8]); p1p1_to_p3(&pre[12], &tp1p1); /* 11 00 */
add_p1p1(&tp1p1,&pre[1],&pre[12]); p1p1_to_p3(&pre[13], &tp1p1); /* 11 01 */
add_p1p1(&tp1p1,&pre[2],&pre[12]); p1p1_to_p3(&pre[14], &tp1p1); /* 11 10 */
add_p1p1(&tp1p1,&pre[3],&pre[12]); p1p1_to_p3(&pre[15], &tp1p1); /* 11 11 */
sc25519_2interleave2(b,s1,s2);
/* scalar multiplication */
*r = pre[b[126]];
for (i = 125; i >= 0; i--) {
dbl_p1p1(&tp1p1, (ge25519_p2 *)r);
p1p1_to_p2((ge25519_p2 *) r, &tp1p1);
dbl_p1p1(&tp1p1, (ge25519_p2 *)r);
if(b[i] != 0) {
p1p1_to_p3(r, &tp1p1);
add_p1p1(&tp1p1, r, &pre[b[i]]);
}
if (i != 0) {
p1p1_to_p2((ge25519_p2 *)r, &tp1p1);
} else {
p1p1_to_p3(r, &tp1p1);
}
}
}
void ge25519_scalarmult_base(ge25519_p3 *r, const sc25519 *s)
{
signed char b[85];
int i;
ge25519_aff t;
sc25519_window3(b,s);
choose_t((ge25519_aff *)r, 0, b[0]);
fe25519_setone(&r->z);
fe25519_mul(&r->t, &r->x, &r->y);
for (i = 1; i < 85; i++) {
choose_t(&t, (unsigned long long) i, b[i]);
ge25519_mixadd2(r, &t);
}
}

858
libssh/src/ge25519_base.data Normal file
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@ -0,0 +1,858 @@
/* $OpenBSD: ge25519_base.data,v 1.3 2013/12/09 11:03:45 markus Exp $ */
/*
* Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange,
* Peter Schwabe, Bo-Yin Yang.
* Copied from supercop-20130419/crypto_sign/ed25519/ref/ge25519_base.data
*/
{{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
{{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}},
{{{0x1a, 0xd5, 0x25, 0x8f, 0x60, 0x2d, 0x56, 0xc9, 0xb2, 0xa7, 0x25, 0x95, 0x60, 0xc7, 0x2c, 0x69, 0x5c, 0xdc, 0xd6, 0xfd, 0x31, 0xe2, 0xa4, 0xc0, 0xfe, 0x53, 0x6e, 0xcd, 0xd3, 0x36, 0x69, 0x21}} ,
{{0x58, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66}}},
{{{0x0e, 0xce, 0x43, 0x28, 0x4e, 0xa1, 0xc5, 0x83, 0x5f, 0xa4, 0xd7, 0x15, 0x45, 0x8e, 0x0d, 0x08, 0xac, 0xe7, 0x33, 0x18, 0x7d, 0x3b, 0x04, 0x3d, 0x6c, 0x04, 0x5a, 0x9f, 0x4c, 0x38, 0xab, 0x36}} ,
{{0xc9, 0xa3, 0xf8, 0x6a, 0xae, 0x46, 0x5f, 0x0e, 0x56, 0x51, 0x38, 0x64, 0x51, 0x0f, 0x39, 0x97, 0x56, 0x1f, 0xa2, 0xc9, 0xe8, 0x5e, 0xa2, 0x1d, 0xc2, 0x29, 0x23, 0x09, 0xf3, 0xcd, 0x60, 0x22}}},
{{{0x5c, 0xe2, 0xf8, 0xd3, 0x5f, 0x48, 0x62, 0xac, 0x86, 0x48, 0x62, 0x81, 0x19, 0x98, 0x43, 0x63, 0x3a, 0xc8, 0xda, 0x3e, 0x74, 0xae, 0xf4, 0x1f, 0x49, 0x8f, 0x92, 0x22, 0x4a, 0x9c, 0xae, 0x67}} ,
{{0xd4, 0xb4, 0xf5, 0x78, 0x48, 0x68, 0xc3, 0x02, 0x04, 0x03, 0x24, 0x67, 0x17, 0xec, 0x16, 0x9f, 0xf7, 0x9e, 0x26, 0x60, 0x8e, 0xa1, 0x26, 0xa1, 0xab, 0x69, 0xee, 0x77, 0xd1, 0xb1, 0x67, 0x12}}},
{{{0x70, 0xf8, 0xc9, 0xc4, 0x57, 0xa6, 0x3a, 0x49, 0x47, 0x15, 0xce, 0x93, 0xc1, 0x9e, 0x73, 0x1a, 0xf9, 0x20, 0x35, 0x7a, 0xb8, 0xd4, 0x25, 0x83, 0x46, 0xf1, 0xcf, 0x56, 0xdb, 0xa8, 0x3d, 0x20}} ,
{{0x2f, 0x11, 0x32, 0xca, 0x61, 0xab, 0x38, 0xdf, 0xf0, 0x0f, 0x2f, 0xea, 0x32, 0x28, 0xf2, 0x4c, 0x6c, 0x71, 0xd5, 0x80, 0x85, 0xb8, 0x0e, 0x47, 0xe1, 0x95, 0x15, 0xcb, 0x27, 0xe8, 0xd0, 0x47}}},
{{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
{{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}},
{{{0xc8, 0x84, 0xa5, 0x08, 0xbc, 0xfd, 0x87, 0x3b, 0x99, 0x8b, 0x69, 0x80, 0x7b, 0xc6, 0x3a, 0xeb, 0x93, 0xcf, 0x4e, 0xf8, 0x5c, 0x2d, 0x86, 0x42, 0xb6, 0x71, 0xd7, 0x97, 0x5f, 0xe1, 0x42, 0x67}} ,
{{0xb4, 0xb9, 0x37, 0xfc, 0xa9, 0x5b, 0x2f, 0x1e, 0x93, 0xe4, 0x1e, 0x62, 0xfc, 0x3c, 0x78, 0x81, 0x8f, 0xf3, 0x8a, 0x66, 0x09, 0x6f, 0xad, 0x6e, 0x79, 0x73, 0xe5, 0xc9, 0x00, 0x06, 0xd3, 0x21}}},
{{{0xf8, 0xf9, 0x28, 0x6c, 0x6d, 0x59, 0xb2, 0x59, 0x74, 0x23, 0xbf, 0xe7, 0x33, 0x8d, 0x57, 0x09, 0x91, 0x9c, 0x24, 0x08, 0x15, 0x2b, 0xe2, 0xb8, 0xee, 0x3a, 0xe5, 0x27, 0x06, 0x86, 0xa4, 0x23}} ,
{{0xeb, 0x27, 0x67, 0xc1, 0x37, 0xab, 0x7a, 0xd8, 0x27, 0x9c, 0x07, 0x8e, 0xff, 0x11, 0x6a, 0xb0, 0x78, 0x6e, 0xad, 0x3a, 0x2e, 0x0f, 0x98, 0x9f, 0x72, 0xc3, 0x7f, 0x82, 0xf2, 0x96, 0x96, 0x70}}},
{{{0x81, 0x6b, 0x88, 0xe8, 0x1e, 0xc7, 0x77, 0x96, 0x0e, 0xa1, 0xa9, 0x52, 0xe0, 0xd8, 0x0e, 0x61, 0x9e, 0x79, 0x2d, 0x95, 0x9c, 0x8d, 0x96, 0xe0, 0x06, 0x40, 0x5d, 0x87, 0x28, 0x5f, 0x98, 0x70}} ,
{{0xf1, 0x79, 0x7b, 0xed, 0x4f, 0x44, 0xb2, 0xe7, 0x08, 0x0d, 0xc2, 0x08, 0x12, 0xd2, 0x9f, 0xdf, 0xcd, 0x93, 0x20, 0x8a, 0xcf, 0x33, 0xca, 0x6d, 0x89, 0xb9, 0x77, 0xc8, 0x93, 0x1b, 0x4e, 0x60}}},
{{{0x26, 0x4f, 0x7e, 0x97, 0xf6, 0x40, 0xdd, 0x4f, 0xfc, 0x52, 0x78, 0xf9, 0x90, 0x31, 0x03, 0xe6, 0x7d, 0x56, 0x39, 0x0b, 0x1d, 0x56, 0x82, 0x85, 0xf9, 0x1a, 0x42, 0x17, 0x69, 0x6c, 0xcf, 0x39}} ,
{{0x69, 0xd2, 0x06, 0x3a, 0x4f, 0x39, 0x2d, 0xf9, 0x38, 0x40, 0x8c, 0x4c, 0xe7, 0x05, 0x12, 0xb4, 0x78, 0x8b, 0xf8, 0xc0, 0xec, 0x93, 0xde, 0x7a, 0x6b, 0xce, 0x2c, 0xe1, 0x0e, 0xa9, 0x34, 0x44}}},
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{{{0xc4, 0x0b, 0x4b, 0x62, 0x99, 0x37, 0x84, 0x3f, 0x74, 0xa2, 0xf9, 0xce, 0xe2, 0x0b, 0x0f, 0x2a, 0x3d, 0xa3, 0xe3, 0xdb, 0x5a, 0x9d, 0x93, 0xcc, 0xa5, 0xef, 0x82, 0x91, 0x1d, 0xe6, 0x6c, 0x68}} ,
{{0xa3, 0x64, 0x17, 0x9b, 0x8b, 0xc8, 0x3a, 0x61, 0xe6, 0x9d, 0xc6, 0xed, 0x7b, 0x03, 0x52, 0x26, 0x9d, 0x3a, 0xb3, 0x13, 0xcc, 0x8a, 0xfd, 0x2c, 0x1a, 0x1d, 0xed, 0x13, 0xd0, 0x55, 0x57, 0x0e}}},
{{{0x1a, 0xea, 0xbf, 0xfd, 0x4a, 0x3c, 0x8e, 0xec, 0x29, 0x7e, 0x77, 0x77, 0x12, 0x99, 0xd7, 0x84, 0xf9, 0x55, 0x7f, 0xf1, 0x8b, 0xb4, 0xd2, 0x95, 0xa3, 0x8d, 0xf0, 0x8a, 0xa7, 0xeb, 0x82, 0x4b}} ,
{{0x2c, 0x28, 0xf4, 0x3a, 0xf6, 0xde, 0x0a, 0xe0, 0x41, 0x44, 0x23, 0xf8, 0x3f, 0x03, 0x64, 0x9f, 0xc3, 0x55, 0x4c, 0xc6, 0xc1, 0x94, 0x1c, 0x24, 0x5d, 0x5f, 0x92, 0x45, 0x96, 0x57, 0x37, 0x14}}},
{{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
{{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}},
{{{0xc1, 0xcd, 0x90, 0x66, 0xb9, 0x76, 0xa0, 0x5b, 0xa5, 0x85, 0x75, 0x23, 0xf9, 0x89, 0xa5, 0x82, 0xb2, 0x6f, 0xb1, 0xeb, 0xc4, 0x69, 0x6f, 0x18, 0x5a, 0xed, 0x94, 0x3d, 0x9d, 0xd9, 0x2c, 0x1a}} ,
{{0x35, 0xb0, 0xe6, 0x73, 0x06, 0xb7, 0x37, 0xe0, 0xf8, 0xb0, 0x22, 0xe8, 0xd2, 0xed, 0x0b, 0xef, 0xe6, 0xc6, 0x5a, 0x99, 0x9e, 0x1a, 0x9f, 0x04, 0x97, 0xe4, 0x4d, 0x0b, 0xbe, 0xba, 0x44, 0x40}}},
{{{0xc1, 0x56, 0x96, 0x91, 0x5f, 0x1f, 0xbb, 0x54, 0x6f, 0x88, 0x89, 0x0a, 0xb2, 0xd6, 0x41, 0x42, 0x6a, 0x82, 0xee, 0x14, 0xaa, 0x76, 0x30, 0x65, 0x0f, 0x67, 0x39, 0xa6, 0x51, 0x7c, 0x49, 0x24}} ,
{{0x35, 0xa3, 0x78, 0xd1, 0x11, 0x0f, 0x75, 0xd3, 0x70, 0x46, 0xdb, 0x20, 0x51, 0xcb, 0x92, 0x80, 0x54, 0x10, 0x74, 0x36, 0x86, 0xa9, 0xd7, 0xa3, 0x08, 0x78, 0xf1, 0x01, 0x29, 0xf8, 0x80, 0x3b}}},
{{{0xdb, 0xa7, 0x9d, 0x9d, 0xbf, 0xa0, 0xcc, 0xed, 0x53, 0xa2, 0xa2, 0x19, 0x39, 0x48, 0x83, 0x19, 0x37, 0x58, 0xd1, 0x04, 0x28, 0x40, 0xf7, 0x8a, 0xc2, 0x08, 0xb7, 0xa5, 0x42, 0xcf, 0x53, 0x4c}} ,
{{0xa7, 0xbb, 0xf6, 0x8e, 0xad, 0xdd, 0xf7, 0x90, 0xdd, 0x5f, 0x93, 0x89, 0xae, 0x04, 0x37, 0xe6, 0x9a, 0xb7, 0xe8, 0xc0, 0xdf, 0x16, 0x2a, 0xbf, 0xc4, 0x3a, 0x3c, 0x41, 0xd5, 0x89, 0x72, 0x5a}}},
{{{0x1f, 0x96, 0xff, 0x34, 0x2c, 0x13, 0x21, 0xcb, 0x0a, 0x89, 0x85, 0xbe, 0xb3, 0x70, 0x9e, 0x1e, 0xde, 0x97, 0xaf, 0x96, 0x30, 0xf7, 0x48, 0x89, 0x40, 0x8d, 0x07, 0xf1, 0x25, 0xf0, 0x30, 0x58}} ,
{{0x1e, 0xd4, 0x93, 0x57, 0xe2, 0x17, 0xe7, 0x9d, 0xab, 0x3c, 0x55, 0x03, 0x82, 0x2f, 0x2b, 0xdb, 0x56, 0x1e, 0x30, 0x2e, 0x24, 0x47, 0x6e, 0xe6, 0xff, 0x33, 0x24, 0x2c, 0x75, 0x51, 0xd4, 0x67}}},
{{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
{{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}},
{{{0x2b, 0x06, 0xd9, 0xa1, 0x5d, 0xe1, 0xf4, 0xd1, 0x1e, 0x3c, 0x9a, 0xc6, 0x29, 0x2b, 0x13, 0x13, 0x78, 0xc0, 0xd8, 0x16, 0x17, 0x2d, 0x9e, 0xa9, 0xc9, 0x79, 0x57, 0xab, 0x24, 0x91, 0x92, 0x19}} ,
{{0x69, 0xfb, 0xa1, 0x9c, 0xa6, 0x75, 0x49, 0x7d, 0x60, 0x73, 0x40, 0x42, 0xc4, 0x13, 0x0a, 0x95, 0x79, 0x1e, 0x04, 0x83, 0x94, 0x99, 0x9b, 0x1e, 0x0c, 0xe8, 0x1f, 0x54, 0xef, 0xcb, 0xc0, 0x52}}},
{{{0x14, 0x89, 0x73, 0xa1, 0x37, 0x87, 0x6a, 0x7a, 0xcf, 0x1d, 0xd9, 0x2e, 0x1a, 0x67, 0xed, 0x74, 0xc0, 0xf0, 0x9c, 0x33, 0xdd, 0xdf, 0x08, 0xbf, 0x7b, 0xd1, 0x66, 0xda, 0xe6, 0xc9, 0x49, 0x08}} ,
{{0xe9, 0xdd, 0x5e, 0x55, 0xb0, 0x0a, 0xde, 0x21, 0x4c, 0x5a, 0x2e, 0xd4, 0x80, 0x3a, 0x57, 0x92, 0x7a, 0xf1, 0xc4, 0x2c, 0x40, 0xaf, 0x2f, 0xc9, 0x92, 0x03, 0xe5, 0x5a, 0xbc, 0xdc, 0xf4, 0x09}}},
{{{0xf3, 0xe1, 0x2b, 0x7c, 0x05, 0x86, 0x80, 0x93, 0x4a, 0xad, 0xb4, 0x8f, 0x7e, 0x99, 0x0c, 0xfd, 0xcd, 0xef, 0xd1, 0xff, 0x2c, 0x69, 0x34, 0x13, 0x41, 0x64, 0xcf, 0x3b, 0xd0, 0x90, 0x09, 0x1e}} ,
{{0x9d, 0x45, 0xd6, 0x80, 0xe6, 0x45, 0xaa, 0xf4, 0x15, 0xaa, 0x5c, 0x34, 0x87, 0x99, 0xa2, 0x8c, 0x26, 0x84, 0x62, 0x7d, 0xb6, 0x29, 0xc0, 0x52, 0xea, 0xf5, 0x81, 0x18, 0x0f, 0x35, 0xa9, 0x0e}}},
{{{0xe7, 0x20, 0x72, 0x7c, 0x6d, 0x94, 0x5f, 0x52, 0x44, 0x54, 0xe3, 0xf1, 0xb2, 0xb0, 0x36, 0x46, 0x0f, 0xae, 0x92, 0xe8, 0x70, 0x9d, 0x6e, 0x79, 0xb1, 0xad, 0x37, 0xa9, 0x5f, 0xc0, 0xde, 0x03}} ,
{{0x15, 0x55, 0x37, 0xc6, 0x1c, 0x27, 0x1c, 0x6d, 0x14, 0x4f, 0xca, 0xa4, 0xc4, 0x88, 0x25, 0x46, 0x39, 0xfc, 0x5a, 0xe5, 0xfe, 0x29, 0x11, 0x69, 0xf5, 0x72, 0x84, 0x4d, 0x78, 0x9f, 0x94, 0x15}}},
{{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
{{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}},
{{{0xec, 0xd3, 0xff, 0x57, 0x0b, 0xb0, 0xb2, 0xdc, 0xf8, 0x4f, 0xe2, 0x12, 0xd5, 0x36, 0xbe, 0x6b, 0x09, 0x43, 0x6d, 0xa3, 0x4d, 0x90, 0x2d, 0xb8, 0x74, 0xe8, 0x71, 0x45, 0x19, 0x8b, 0x0c, 0x6a}} ,
{{0xb8, 0x42, 0x1c, 0x03, 0xad, 0x2c, 0x03, 0x8e, 0xac, 0xd7, 0x98, 0x29, 0x13, 0xc6, 0x02, 0x29, 0xb5, 0xd4, 0xe7, 0xcf, 0xcc, 0x8b, 0x83, 0xec, 0x35, 0xc7, 0x9c, 0x74, 0xb7, 0xad, 0x85, 0x5f}}},
{{{0x78, 0x84, 0xe1, 0x56, 0x45, 0x69, 0x68, 0x5a, 0x4f, 0xb8, 0xb1, 0x29, 0xff, 0x33, 0x03, 0x31, 0xb7, 0xcb, 0x96, 0x25, 0xe6, 0xe6, 0x41, 0x98, 0x1a, 0xbb, 0x03, 0x56, 0xf2, 0xb2, 0x91, 0x34}} ,
{{0x2c, 0x6c, 0xf7, 0x66, 0xa4, 0x62, 0x6b, 0x39, 0xb3, 0xba, 0x65, 0xd3, 0x1c, 0xf8, 0x11, 0xaa, 0xbe, 0xdc, 0x80, 0x59, 0x87, 0xf5, 0x7b, 0xe5, 0xe3, 0xb3, 0x3e, 0x39, 0xda, 0xbe, 0x88, 0x09}}},
{{{0x8b, 0xf1, 0xa0, 0xf5, 0xdc, 0x29, 0xb4, 0xe2, 0x07, 0xc6, 0x7a, 0x00, 0xd0, 0x89, 0x17, 0x51, 0xd4, 0xbb, 0xd4, 0x22, 0xea, 0x7e, 0x7d, 0x7c, 0x24, 0xea, 0xf2, 0xe8, 0x22, 0x12, 0x95, 0x06}} ,
{{0xda, 0x7c, 0xa4, 0x0c, 0xf4, 0xba, 0x6e, 0xe1, 0x89, 0xb5, 0x59, 0xca, 0xf1, 0xc0, 0x29, 0x36, 0x09, 0x44, 0xe2, 0x7f, 0xd1, 0x63, 0x15, 0x99, 0xea, 0x25, 0xcf, 0x0c, 0x9d, 0xc0, 0x44, 0x6f}}},
{{{0x1d, 0x86, 0x4e, 0xcf, 0xf7, 0x37, 0x10, 0x25, 0x8f, 0x12, 0xfb, 0x19, 0xfb, 0xe0, 0xed, 0x10, 0xc8, 0xe2, 0xf5, 0x75, 0xb1, 0x33, 0xc0, 0x96, 0x0d, 0xfb, 0x15, 0x6c, 0x0d, 0x07, 0x5f, 0x05}} ,
{{0x69, 0x3e, 0x47, 0x97, 0x2c, 0xaf, 0x52, 0x7c, 0x78, 0x83, 0xad, 0x1b, 0x39, 0x82, 0x2f, 0x02, 0x6f, 0x47, 0xdb, 0x2a, 0xb0, 0xe1, 0x91, 0x99, 0x55, 0xb8, 0x99, 0x3a, 0xa0, 0x44, 0x11, 0x51}}}

2
libssh/src/getpass.c
View File

@ -3,7 +3,7 @@
*
* This file is part of the SSH Library
*
* Copyright (c) 2011 by Andreas Schneider <mail@cryptomilk.org>
* Copyright (c) 2011-2013 by Andreas Schneider <mail@cryptomilk.org>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by

455
libssh/src/gssapi.c
View File

@ -49,7 +49,7 @@ struct ssh_gssapi_struct{
enum ssh_gssapi_state_e state; /* current state */
struct gss_OID_desc_struct mech; /* mechanism being elected for auth */
gss_cred_id_t server_creds; /* credentials of server */
gss_cred_id_t client_creds; /* creds of the client */
gss_cred_id_t client_creds; /* creds delegated by the client */
gss_ctx_id_t ctx; /* the authentication context */
gss_name_t client_name; /* Identity of the client */
char *user; /* username of client */
@ -57,7 +57,9 @@ struct ssh_gssapi_struct{
char *service; /* name of the service */
struct {
gss_name_t server_name; /* identity of server */
OM_uint32 flags; /* flags used for init context */
gss_OID oid; /* mech being used for authentication */
gss_cred_id_t creds; /* creds used to initialize context */
gss_cred_id_t client_deleg_creds; /* delegated creds (const, not freeable) */
} client;
};
@ -89,12 +91,13 @@ static void ssh_gssapi_free(ssh_session session){
OM_uint32 min;
if (session->gssapi == NULL)
return;
if (session->gssapi->mech.elements)
SAFE_FREE(session->gssapi->mech.elements);
if (session->gssapi->user)
SAFE_FREE(session->gssapi->user);
if (session->gssapi->server_creds)
gss_release_cred(&min,&session->gssapi->server_creds);
SAFE_FREE(session->gssapi->user);
SAFE_FREE(session->gssapi->mech.elements);
gss_release_cred(&min,&session->gssapi->server_creds);
if (session->gssapi->client.creds !=
session->gssapi->client.client_deleg_creds) {
gss_release_cred(&min, &session->gssapi->client.creds);
}
SAFE_FREE(session->gssapi);
}
@ -208,8 +211,8 @@ int ssh_gssapi_handle_userauth(ssh_session session, const char *user, uint32_t n
maj_stat = gss_import_name(&min_stat, &name_buf,
(gss_OID) GSS_C_NT_HOSTBASED_SERVICE, &server_name);
if (maj_stat != GSS_S_COMPLETE) {
SSH_LOG(0, "importing name %d, %d", maj_stat, min_stat);
ssh_gssapi_log_error(0, "importing name", maj_stat);
SSH_LOG(SSH_LOG_WARNING, "importing name %d, %d", maj_stat, min_stat);
ssh_gssapi_log_error(SSH_LOG_WARNING, "importing name", maj_stat);
return -1;
}
@ -220,13 +223,13 @@ int ssh_gssapi_handle_userauth(ssh_session session, const char *user, uint32_t n
gss_release_oid_set(&min_stat, &both_supported);
if (maj_stat != GSS_S_COMPLETE) {
SSH_LOG(0, "error acquiring credentials %d, %d", maj_stat, min_stat);
ssh_gssapi_log_error(0, "acquiring creds", maj_stat);
SSH_LOG(SSH_LOG_WARNING, "error acquiring credentials %d, %d", maj_stat, min_stat);
ssh_gssapi_log_error(SSH_LOG_WARNING, "acquiring creds", maj_stat);
ssh_auth_reply_default(session,0);
return SSH_ERROR;
}
SSH_LOG(0, "acquiring credentials %d, %d", maj_stat, min_stat);
SSH_LOG(SSH_LOG_PROTOCOL, "acquiring credentials %d, %d", maj_stat, min_stat);
/* finding which OID from client we selected */
for (i=0 ; i< n_oid ; ++i){
@ -263,7 +266,7 @@ static char *ssh_gssapi_name_to_char(gss_name_t name){
OM_uint32 maj_stat, min_stat;
char *ptr;
maj_stat = gss_display_name(&min_stat, name, &buffer, NULL);
ssh_gssapi_log_error(0, "converting name", maj_stat);
ssh_gssapi_log_error(SSH_LOG_WARNING, "converting name", maj_stat);
ptr=malloc(buffer.length + 1);
memcpy(ptr, buffer.value, buffer.length);
ptr[buffer.length] = '\0';
@ -308,14 +311,11 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_token_server){
return SSH_PACKET_USED;
}
if (ssh_string_len(out_token) != 0){
rc = buffer_add_u8(session->out_buffer,
SSH2_MSG_USERAUTH_GSSAPI_TOKEN);
if (rc < 0) {
ssh_set_error_oom(session);
return SSH_PACKET_USED;
}
rc = buffer_add_ssh_string(session->out_buffer, out_token);
if (rc < 0) {
rc = ssh_buffer_pack(session->out_buffer,
"bS",
SSH2_MSG_USERAUTH_GSSAPI_TOKEN,
out_token);
if (rc != SSH_OK) {
ssh_set_error_oom(session);
return SSH_PACKET_USED;
}
@ -335,14 +335,14 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_token_server){
maj_stat = gss_accept_sec_context(&min_stat, &session->gssapi->ctx, session->gssapi->server_creds,
&input_token, input_bindings, &client_name, NULL /*mech_oid*/, &output_token, &ret_flags,
NULL /*time*/, &session->gssapi->client_creds);
ssh_gssapi_log_error(0, "accepting token", maj_stat);
ssh_gssapi_log_error(SSH_LOG_PROTOCOL, "accepting token", maj_stat);
ssh_string_free(token);
if (client_name != GSS_C_NO_NAME){
session->gssapi->client_name = client_name;
session->gssapi->canonic_user = ssh_gssapi_name_to_char(client_name);
}
if (GSS_ERROR(maj_stat)){
ssh_gssapi_log_error(SSH_LOG_PROTOCOL, "Gssapi error", maj_stat);
ssh_gssapi_log_error(SSH_LOG_WARNING, "Gssapi error", maj_stat);
ssh_auth_reply_default(session,0);
ssh_gssapi_free(session);
session->gssapi=NULL;
@ -353,12 +353,12 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_token_server){
hexa = ssh_get_hexa(output_token.value, output_token.length);
SSH_LOG(SSH_LOG_PACKET, "GSSAPI: sending token %s",hexa);
SAFE_FREE(hexa);
token = ssh_string_new(output_token.length);
ssh_string_fill(token, output_token.value, output_token.length);
buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_GSSAPI_TOKEN);
buffer_add_ssh_string(session->out_buffer,token);
ssh_buffer_pack(session->out_buffer,
"bdP",
SSH2_MSG_USERAUTH_GSSAPI_TOKEN,
output_token.length,
(size_t)output_token.length, output_token.value);
packet_send(session);
ssh_string_free(token);
}
if(maj_stat == GSS_S_COMPLETE){
session->gssapi->state = SSH_GSSAPI_STATE_RCV_MIC;
@ -370,69 +370,24 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_token_server){
static ssh_buffer ssh_gssapi_build_mic(ssh_session session){
ssh_buffer mic_buffer;
ssh_string str;
int rc;
str = ssh_string_new(session->current_crypto->digest_len);
if (str == NULL) {
return NULL;
}
ssh_string_fill(str, session->current_crypto->session_id,
session->current_crypto->digest_len);
mic_buffer = ssh_buffer_new();
if (mic_buffer == NULL) {
ssh_string_free(str);
ssh_set_error_oom(session);
return NULL;
}
rc = buffer_add_ssh_string(mic_buffer, str);
ssh_string_free(str);
if (rc < 0) {
ssh_buffer_free(mic_buffer);
return NULL;
}
rc = buffer_add_u8(mic_buffer, SSH2_MSG_USERAUTH_REQUEST);
if (rc < 0) {
ssh_buffer_free(mic_buffer);
return NULL;
}
str = ssh_string_from_char(session->gssapi->user);
if (str == NULL) {
ssh_buffer_free(mic_buffer);
return NULL;
}
rc = buffer_add_ssh_string(mic_buffer, str);
ssh_string_free(str);
if (rc < 0) {
ssh_buffer_free(mic_buffer);
return NULL;
}
str = ssh_string_from_char("ssh-connection");
if (str == NULL) {
ssh_buffer_free(mic_buffer);
return NULL;
}
rc = buffer_add_ssh_string(mic_buffer, str);
ssh_string_free(str);
if (rc < 0) {
ssh_buffer_free(mic_buffer);
return NULL;
}
str = ssh_string_from_char("gssapi-with-mic");
if (str == NULL) {
ssh_buffer_free(mic_buffer);
return NULL;
}
rc = buffer_add_ssh_string(mic_buffer, str);
ssh_string_free(str);
if (rc < 0) {
rc = ssh_buffer_pack(mic_buffer,
"dPbsss",
session->current_crypto->digest_len,
(size_t)session->current_crypto->digest_len, session->current_crypto->session_id,
SSH2_MSG_USERAUTH_REQUEST,
session->gssapi->user,
"ssh-connection",
"gssapi-with-mic");
if (rc != SSH_OK) {
ssh_set_error_oom(session);
ssh_buffer_free(mic_buffer);
return NULL;
}
@ -484,8 +439,8 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_mic)
mic_token_buf.value = ssh_string_data(mic_token);
maj_stat = gss_verify_mic(&min_stat, session->gssapi->ctx, &mic_buf, &mic_token_buf, NULL);
ssh_gssapi_log_error(0, "verifying MIC", maj_stat);
ssh_gssapi_log_error(0, "verifying MIC (min stat)", min_stat);
ssh_gssapi_log_error(SSH_LOG_PROTOCOL, "verifying MIC", maj_stat);
ssh_gssapi_log_error(SSH_LOG_PROTOCOL, "verifying MIC (min stat)", min_stat);
if (maj_stat == GSS_S_DEFECTIVE_TOKEN || GSS_ERROR(maj_stat)) {
goto error;
}
@ -536,8 +491,12 @@ ssh_gssapi_creds ssh_gssapi_get_creds(ssh_session session){
return (ssh_gssapi_creds)session->gssapi->client_creds;
}
#endif /* SERVER */
/**
* @brief Set the forwadable ticket to be given to the server for authentication.
* Unlike ssh_gssapi_get_creds() this is called on the client side of an ssh
* connection.
*
* @param[in] creds gssapi credentials handle.
*/
@ -556,49 +515,20 @@ void ssh_gssapi_set_creds(ssh_session session, const ssh_gssapi_creds creds)
session->gssapi->client.client_deleg_creds = (gss_cred_id_t)creds;
}
#endif /* SERVER */
static int ssh_gssapi_send_auth_mic(ssh_session session, ssh_string *oid_set, int n_oid){
ssh_string str;
int rc;
int i;
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_REQUEST);
if (rc < 0) {
goto fail;
}
/* username */
str = ssh_string_from_char(session->opts.username);
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* service */
str = ssh_string_from_char("ssh-connection");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
/* method */
str = ssh_string_from_char("gssapi-with-mic");
if (str == NULL) {
goto fail;
}
rc = buffer_add_ssh_string(session->out_buffer, str);
ssh_string_free(str);
if (rc < 0) {
goto fail;
}
rc = buffer_add_u32(session->out_buffer, htonl(n_oid));
if (rc < 0) {
rc = ssh_buffer_pack(session->out_buffer,
"bsssd",
SSH2_MSG_USERAUTH_REQUEST,
session->opts.username,
"ssh-connection",
"gssapi-with-mic",
n_oid);
if (rc != SSH_OK) {
ssh_set_error_oom(session);
goto fail;
}
@ -612,92 +542,79 @@ static int ssh_gssapi_send_auth_mic(ssh_session session, ssh_string *oid_set, in
session->auth_state = SSH_AUTH_STATE_GSSAPI_REQUEST_SENT;
return packet_send(session);
fail:
buffer_reinit(session->out_buffer);
ssh_buffer_reinit(session->out_buffer);
return SSH_ERROR;
}
/** @brief returns the OIDs of the mechs that work with both
* hostname and username
/** @brief returns the OIDs of the mechs that have usable credentials
*/
static int ssh_gssapi_match(ssh_session session, char *hostname, char *username, gss_OID_set *valid_oids, int deleg){
gss_buffer_desc host_namebuf, user_namebuf;
gss_name_t host_name, user_name;
OM_uint32 maj_stat, min_stat;
gss_OID_set supported;
static int ssh_gssapi_match(ssh_session session, gss_OID_set *valid_oids)
{
OM_uint32 maj_stat, min_stat, lifetime;
gss_OID_set actual_mechs;
gss_buffer_desc namebuf;
gss_name_t client_id = GSS_C_NO_NAME;
gss_OID oid;
gss_ctx_id_t ctx = GSS_C_NO_CONTEXT;
gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
gss_cred_id_t client_creds = GSS_C_NO_CREDENTIAL;
unsigned int i;
char *ptr;
char hostname_buf[256];
int ret;
if (session->gssapi->client.client_deleg_creds == NULL) {
if (session->opts.gss_client_identity != NULL) {
namebuf.value = (void *)session->opts.gss_client_identity;
namebuf.length = strlen(session->opts.gss_client_identity);
gss_create_empty_oid_set(&min_stat, valid_oids);
maj_stat = gss_indicate_mechs(&min_stat, &supported);
for (i=0; i < supported->count; ++i){
ptr=ssh_get_hexa(supported->elements[i].elements, supported->elements[i].length);
SSH_LOG(SSH_LOG_DEBUG, "GSSAPI oid supported %d : %s\n",i, ptr);
SAFE_FREE(ptr);
}
user_namebuf.value = username;
user_namebuf.length = strlen(username) + 1;
maj_stat = gss_import_name(&min_stat, &user_namebuf,
(gss_OID) GSS_C_NT_USER_NAME, &user_name);
if (maj_stat != GSS_S_COMPLETE) {
SSH_LOG(SSH_LOG_DEBUG, "importing name %d, %d", maj_stat, min_stat);
ssh_gssapi_log_error(SSH_LOG_DEBUG, "importing name", maj_stat);
return -1;
}
snprintf(hostname_buf, sizeof(hostname_buf),"host@%s", hostname);
host_namebuf.value = hostname_buf;
host_namebuf.length = strlen(hostname_buf) + 1;
maj_stat = gss_import_name(&min_stat, &host_namebuf,
(gss_OID) GSS_C_NT_HOSTBASED_SERVICE, &host_name);
if (maj_stat != GSS_S_COMPLETE) {
SSH_LOG(0, "importing name %d, %d", maj_stat, min_stat);
ssh_gssapi_log_error(0, "importing name", maj_stat);
return -1;
}
ssh_gssapi_init(session);
session->gssapi->client_name = user_name;
session->gssapi->client.server_name = host_name;
session->gssapi->user = strdup(username);
for (i=0; i<supported->count; ++i){
oid = &supported->elements[i];
maj_stat = gss_init_sec_context(&min_stat,
session->gssapi->client.client_deleg_creds, &ctx, host_name, oid,
GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG | (deleg ? GSS_C_DELEG_FLAG : 0),
0, NULL, &input_token, NULL, &output_token, NULL, NULL);
if (!GSS_ERROR(maj_stat)){
gss_OID_set tmp;
if (session->gssapi->client.client_deleg_creds != GSS_C_NO_CREDENTIAL){
/* we know the oid is ok since init_sec_context worked */
gss_add_oid_set_member(&min_stat, oid, valid_oids);
SSH_LOG(SSH_LOG_PROTOCOL, "Matched oid %u for server (with forwarding)", i);
} else {
gss_create_empty_oid_set(&min_stat, &tmp);
gss_add_oid_set_member(&min_stat, oid, &tmp);
maj_stat = gss_acquire_cred(&min_stat, user_name, 0,
tmp, GSS_C_INITIATE,
&client_creds, NULL, NULL);
gss_release_oid_set(&min_stat, &tmp);
if (!GSS_ERROR(maj_stat)){
gss_release_cred(&min_stat, &client_creds);
gss_add_oid_set_member(&min_stat,oid,valid_oids);
SSH_LOG(SSH_LOG_PROTOCOL, "Matched oid %u for server", i);
}
maj_stat = gss_import_name(&min_stat, &namebuf,
GSS_C_NT_USER_NAME, &client_id);
if (GSS_ERROR(maj_stat)) {
ret = SSH_ERROR;
goto end;
}
}
gss_delete_sec_context(&min_stat,&ctx, &output_token);
ctx = GSS_C_NO_CONTEXT;
maj_stat = gss_acquire_cred(&min_stat, client_id, GSS_C_INDEFINITE,
GSS_C_NO_OID_SET, GSS_C_INITIATE,
&session->gssapi->client.creds,
&actual_mechs, NULL);
if (GSS_ERROR(maj_stat)) {
ret = SSH_ERROR;
goto end;
}
} else {
session->gssapi->client.creds =
session->gssapi->client.client_deleg_creds;
maj_stat = gss_inquire_cred(&min_stat, session->gssapi->client.creds,
&client_id, NULL, NULL, &actual_mechs);
if (GSS_ERROR(maj_stat)) {
ret = SSH_ERROR;
goto end;
}
}
return SSH_OK;
gss_create_empty_oid_set(&min_stat, valid_oids);
/* double check each single cred */
for (i = 0; i < actual_mechs->count; i++) {
/* check lifetime is not 0 or skip */
lifetime = 0;
oid = &actual_mechs->elements[i];
maj_stat = gss_inquire_cred_by_mech(&min_stat,
session->gssapi->client.creds,
oid, NULL, &lifetime, NULL, NULL);
if (maj_stat == GSS_S_COMPLETE && lifetime > 0) {
gss_add_oid_set_member(&min_stat, oid, valid_oids);
ptr = ssh_get_hexa(oid->elements, oid->length);
SSH_LOG(SSH_LOG_DEBUG, "GSSAPI valid oid %d : %s\n", i, ptr);
SAFE_FREE(ptr);
}
}
ret = SSH_OK;
end:
gss_release_name(&min_stat, &client_id);
return ret;
}
/**
@ -713,21 +630,55 @@ int ssh_gssapi_auth_mic(ssh_session session){
ssh_string *oids;
int rc;
int n_oids = 0;
OM_uint32 maj_stat, min_stat;
char name_buf[256];
gss_buffer_desc hostname;
const char *gss_host = session->opts.host;
if (ssh_gssapi_init(session) == SSH_ERROR)
rc = ssh_gssapi_init(session);
if (rc == SSH_ERROR) {
return SSH_AUTH_ERROR;
}
if (session->opts.gss_server_identity != NULL) {
gss_host = session->opts.gss_server_identity;
}
/* import target host name */
snprintf(name_buf, sizeof(name_buf), "host@%s", gss_host);
hostname.value = name_buf;
hostname.length = strlen(name_buf) + 1;
maj_stat = gss_import_name(&min_stat, &hostname,
(gss_OID)GSS_C_NT_HOSTBASED_SERVICE,
&session->gssapi->client.server_name);
if (maj_stat != GSS_S_COMPLETE) {
SSH_LOG(SSH_LOG_WARNING, "importing name %d, %d", maj_stat, min_stat);
ssh_gssapi_log_error(SSH_LOG_WARNING, "importing name", maj_stat);
return SSH_PACKET_USED;
}
/* copy username */
session->gssapi->user = strdup(session->opts.username);
if (session->gssapi->user == NULL) {
ssh_set_error_oom(session);
return SSH_AUTH_ERROR;
}
SSH_LOG(SSH_LOG_PROTOCOL, "Authenticating with gssapi to host %s with user %s",
session->opts.host, session->opts.username);
rc = ssh_gssapi_match(session,session->opts.host, session->opts.username, &selected, 0);
if (rc == SSH_ERROR)
session->opts.host, session->gssapi->user);
rc = ssh_gssapi_match(session, &selected);
if (rc == SSH_ERROR) {
return SSH_AUTH_DENIED;
}
n_oids = selected->count;
SSH_LOG(SSH_LOG_PROTOCOL, "Sending %d oids", n_oids);
oids = calloc(n_oids, sizeof(ssh_string));
if (oids == NULL) {
ssh_set_error_oom(session);
return SSH_AUTH_ERROR;
}
for (i=0; i<n_oids; ++i){
oids[i] = ssh_string_new(selected->elements[i].length + 2);
@ -769,15 +720,10 @@ static gss_OID ssh_gssapi_oid_from_string(ssh_string oid_s){
SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_response){
ssh_string oid_s;
gss_OID oid;
gss_uint32 maj_stat, min_stat;
int deleg = 0;
gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
gss_OID_set tmp;
char *hexa;
ssh_string token;
gss_cred_id_t creds = GSS_C_NO_CREDENTIAL;
(void)type;
(void)user;
@ -791,31 +737,27 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_response){
ssh_set_error(session, SSH_FATAL, "Missing OID");
return SSH_PACKET_USED;
}
oid = ssh_gssapi_oid_from_string(oid_s);
session->gssapi->client.oid = ssh_gssapi_oid_from_string(oid_s);
ssh_string_free(oid_s);
if (!oid) {
if (!session->gssapi->client.oid) {
ssh_set_error(session, SSH_FATAL, "Invalid OID");
return SSH_PACKET_USED;
}
if (session->gssapi->client.client_deleg_creds != GSS_C_NO_CREDENTIAL)
creds = session->gssapi->client.client_deleg_creds;
if (creds == GSS_C_NO_CREDENTIAL){
gss_create_empty_oid_set(&min_stat, &tmp);
gss_add_oid_set_member(&min_stat, oid, &tmp);
maj_stat = gss_acquire_cred(&min_stat, session->gssapi->client_name, 0,
tmp, GSS_C_INITIATE,
&session->gssapi->client_creds, NULL, NULL);
gss_release_oid_set(&min_stat, &tmp);
if (GSS_ERROR(maj_stat)){
ssh_gssapi_log_error(SSH_LOG_WARNING,"Error acquiring credentials",maj_stat);
return SSH_PACKET_USED;
}
session->gssapi->client.flags = GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG;
if (session->opts.gss_delegate_creds) {
session->gssapi->client.flags |= GSS_C_DELEG_FLAG;
}
/* prepare the first TOKEN response */
maj_stat = gss_init_sec_context(&min_stat,
creds, &session->gssapi->ctx, session->gssapi->client.server_name, oid,
GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG | (deleg ? GSS_C_DELEG_FLAG : 0),
0, NULL, &input_token, NULL, &output_token, NULL, NULL);
session->gssapi->client.creds,
&session->gssapi->ctx,
session->gssapi->client.server_name,
session->gssapi->client.oid,
session->gssapi->client.flags,
0, NULL, &input_token, NULL,
&output_token, NULL, NULL);
if(GSS_ERROR(maj_stat)){
ssh_gssapi_log_error(SSH_LOG_WARNING, "Initializing gssapi context", maj_stat);
return SSH_PACKET_USED;
@ -824,15 +766,14 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_response){
hexa = ssh_get_hexa(output_token.value, output_token.length);
SSH_LOG(SSH_LOG_PACKET, "GSSAPI: sending token %s",hexa);
SAFE_FREE(hexa);
token = ssh_string_new(output_token.length);
ssh_string_fill(token, output_token.value, output_token.length);
buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_GSSAPI_TOKEN);
buffer_add_ssh_string(session->out_buffer,token);
ssh_buffer_pack(session->out_buffer,
"bdP",
SSH2_MSG_USERAUTH_GSSAPI_TOKEN,
output_token.length,
(size_t)output_token.length, output_token.value);
packet_send(session);
ssh_string_free(token);
session->auth_state = SSH_AUTH_STATE_GSSAPI_TOKEN;
}
session->gssapi->client.oid = oid;
return SSH_PACKET_USED;
}
@ -856,31 +797,21 @@ static int ssh_gssapi_send_mic(ssh_session session){
maj_stat = gss_get_mic(&min_stat,session->gssapi->ctx, GSS_C_QOP_DEFAULT, &mic_buf, &mic_token_buf);
if (GSS_ERROR(maj_stat)){
ssh_buffer_free(mic_buffer);
ssh_gssapi_log_error(0, "generating MIC", maj_stat);
ssh_gssapi_log_error(SSH_LOG_PROTOCOL, "generating MIC", maj_stat);
return SSH_ERROR;
}
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_GSSAPI_MIC);
if (rc < 0) {
rc = ssh_buffer_pack(session->out_buffer,
"bdP",
SSH2_MSG_USERAUTH_GSSAPI_MIC,
mic_token_buf.length,
(size_t)mic_token_buf.length, mic_token_buf.value);
if (rc != SSH_OK) {
ssh_buffer_free(mic_buffer);
ssh_set_error_oom(session);
return SSH_ERROR;
}
rc = buffer_add_u32(session->out_buffer, htonl(mic_token_buf.length));
if (rc < 0) {
ssh_buffer_free(mic_buffer);
ssh_set_error_oom(session);
return SSH_ERROR;
}
rc = buffer_add_data(session->out_buffer, mic_token_buf.value, mic_token_buf.length);
ssh_buffer_free(mic_buffer);
if (rc < 0) {
ssh_set_error_oom(session);
return SSH_ERROR;
}
return packet_send(session);
}
@ -889,8 +820,6 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_token_client){
char *hexa;
OM_uint32 maj_stat, min_stat;
gss_buffer_desc input_token, output_token = GSS_C_EMPTY_BUFFER;
gss_cred_id_t creds = GSS_C_NO_CREDENTIAL;
int deleg = 0;
(void)user;
(void)type;
@ -910,16 +839,16 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_token_client){
SAFE_FREE(hexa);
input_token.length = ssh_string_len(token);
input_token.value = ssh_string_data(token);
if (session->gssapi->client.client_deleg_creds != GSS_C_NO_CREDENTIAL)
creds = session->gssapi->client.client_deleg_creds;
else
creds = session->gssapi->client_creds;
maj_stat = gss_init_sec_context(&min_stat,
creds, &session->gssapi->ctx, session->gssapi->client.server_name, session->gssapi->client.oid,
GSS_C_MUTUAL_FLAG | GSS_C_INTEG_FLAG | (deleg ? GSS_C_DELEG_FLAG : 0),
0, NULL, &input_token, NULL, &output_token, NULL, NULL);
session->gssapi->client.creds,
&session->gssapi->ctx,
session->gssapi->client.server_name,
session->gssapi->client.oid,
session->gssapi->client.flags,
0, NULL, &input_token, NULL,
&output_token, NULL, NULL);
ssh_gssapi_log_error(0, "accepting token", maj_stat);
ssh_gssapi_log_error(SSH_LOG_PROTOCOL, "accepting token", maj_stat);
ssh_string_free(token);
if (GSS_ERROR(maj_stat)){
ssh_gssapi_log_error(SSH_LOG_PROTOCOL, "Gssapi error", maj_stat);
@ -932,12 +861,12 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_token_client){
hexa = ssh_get_hexa(output_token.value, output_token.length);
SSH_LOG(SSH_LOG_PACKET, "GSSAPI: sending token %s",hexa);
SAFE_FREE(hexa);
token = ssh_string_new(output_token.length);
ssh_string_fill(token, output_token.value, output_token.length);
buffer_add_u8(session->out_buffer, SSH2_MSG_USERAUTH_GSSAPI_TOKEN);
buffer_add_ssh_string(session->out_buffer,token);
ssh_buffer_pack(session->out_buffer,
"bdP",
SSH2_MSG_USERAUTH_GSSAPI_TOKEN,
output_token.length,
(size_t)output_token.length, output_token.value);
packet_send(session);
ssh_string_free(token);
}
if(maj_stat == GSS_S_COMPLETE){
session->auth_state = SSH_AUTH_STATE_NONE;

14
libssh/src/gzip.c
View File

@ -4,7 +4,7 @@
* This file is part of the SSH Library
*
* Copyright (c) 2003 by Aris Adamantiadis
* Copyright (c) 2009 by Andreas Schneider <mail@cynapses.org>
* Copyright (c) 2009 by Andreas Schneider <asn@cryptomilk.org>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -90,7 +90,7 @@ static ssh_buffer gzip_compress(ssh_session session,ssh_buffer source,int level)
return NULL;
}
len = BLOCKSIZE - zout->avail_out;
if (buffer_add_data(dest, out_buf, len) < 0) {
if (ssh_buffer_add_data(dest, out_buf, len) < 0) {
ssh_buffer_free(dest);
return NULL;
}
@ -108,12 +108,12 @@ int compress_buffer(ssh_session session, ssh_buffer buf) {
return -1;
}
if (buffer_reinit(buf) < 0) {
if (ssh_buffer_reinit(buf) < 0) {
ssh_buffer_free(dest);
return -1;
}
if (buffer_add_data(buf, buffer_get_rest(dest), buffer_get_rest_len(dest)) < 0) {
if (ssh_buffer_add_data(buf, buffer_get_rest(dest), buffer_get_rest_len(dest)) < 0) {
ssh_buffer_free(dest);
return -1;
}
@ -181,7 +181,7 @@ static ssh_buffer gzip_decompress(ssh_session session, ssh_buffer source, size_t
}
len = BLOCKSIZE - zin->avail_out;
if (buffer_add_data(dest,out_buf,len) < 0) {
if (ssh_buffer_add_data(dest,out_buf,len) < 0) {
ssh_buffer_free(dest);
return NULL;
}
@ -204,12 +204,12 @@ int decompress_buffer(ssh_session session,ssh_buffer buf, size_t maxlen){
return -1;
}
if (buffer_reinit(buf) < 0) {
if (ssh_buffer_reinit(buf) < 0) {
ssh_buffer_free(dest);
return -1;
}
if (buffer_add_data(buf, buffer_get_rest(dest), buffer_get_rest_len(dest)) < 0) {
if (ssh_buffer_add_data(buf, buffer_get_rest(dest), buffer_get_rest_len(dest)) < 0) {
ssh_buffer_free(dest);
return -1;
}

322
libssh/src/kex.c
View File

@ -35,6 +35,7 @@
#include "libssh/ssh2.h"
#include "libssh/string.h"
#include "libssh/curve25519.h"
#include "libssh/knownhosts.h"
#ifdef HAVE_LIBGCRYPT
# define BLOWFISH "blowfish-cbc,"
@ -72,7 +73,7 @@
#ifdef HAVE_ECDH
#define ECDH "ecdh-sha2-nistp256,"
#define HOSTKEYS "ecdsa-sha2-nistp256,ssh-rsa,ssh-dss"
#define HOSTKEYS "ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,ssh-dss"
#else
#define HOSTKEYS "ssh-rsa,ssh-dss"
#define ECDH ""
@ -87,8 +88,8 @@ static const char *default_methods[] = {
HOSTKEYS,
AES BLOWFISH DES,
AES BLOWFISH DES,
"hmac-sha1",
"hmac-sha1",
"hmac-sha1,hmac-sha2-256,hmac-sha2-512",
"hmac-sha1,hmac-sha2-256,hmac-sha2-512",
"none",
"none",
"",
@ -102,8 +103,8 @@ static const char *supported_methods[] = {
HOSTKEYS,
AES BLOWFISH DES,
AES BLOWFISH DES,
"hmac-sha1",
"hmac-sha1",
"hmac-sha1,hmac-sha2-256,hmac-sha2-512",
"hmac-sha1,hmac-sha2-256,hmac-sha2-512",
ZLIB,
ZLIB,
"",
@ -274,87 +275,180 @@ char *ssh_find_matching(const char *available_d, const char *preferred_d){
return NULL;
}
/**
* @internal
* @brief returns whether the first client key exchange algorithm matches
* the first server key exchange algorithm
* @returns whether the first client key exchange algorithm matches
* the first server key exchange algorithm
*/
static int is_first_kex_packet_follows_guess_wrong(const char *client_kex,
const char *server_kex) {
int is_wrong = 1;
char **server_kex_tokens = NULL;
char **client_kex_tokens = NULL;
if ((client_kex == NULL) || (server_kex == NULL)) {
goto out;
}
client_kex_tokens = tokenize(client_kex);
if (client_kex_tokens == NULL) {
goto out;
}
if (client_kex_tokens[0] == NULL) {
goto freeout;
}
server_kex_tokens = tokenize(server_kex);
if (server_kex_tokens == NULL) {
goto freeout;
}
is_wrong = (strcmp(client_kex_tokens[0], server_kex_tokens[0]) != 0);
SAFE_FREE(server_kex_tokens[0]);
SAFE_FREE(server_kex_tokens);
freeout:
SAFE_FREE(client_kex_tokens[0]);
SAFE_FREE(client_kex_tokens);
out:
return is_wrong;
}
SSH_PACKET_CALLBACK(ssh_packet_kexinit){
int server_kex=session->server;
ssh_string str = NULL;
char *strings[KEX_METHODS_SIZE];
int i;
int i;
int server_kex=session->server;
ssh_string str = NULL;
char *strings[KEX_METHODS_SIZE];
int rc = SSH_ERROR;
(void)type;
(void)user;
memset(strings, 0, sizeof(strings));
if (session->session_state == SSH_SESSION_STATE_AUTHENTICATED){
SSH_LOG(SSH_LOG_WARNING, "Other side initiating key re-exchange");
} else if(session->session_state != SSH_SESSION_STATE_INITIAL_KEX){
ssh_set_error(session,SSH_FATAL,"SSH_KEXINIT received in wrong state");
goto error;
}
if (server_kex) {
if (buffer_get_data(packet,session->next_crypto->client_kex.cookie,16) != 16) {
ssh_set_error(session, SSH_FATAL, "ssh_packet_kexinit: no cookie in packet");
uint8_t first_kex_packet_follows = 0;
uint32_t kexinit_reserved = 0;
(void)type;
(void)user;
memset(strings, 0, sizeof(strings));
if (session->session_state == SSH_SESSION_STATE_AUTHENTICATED){
SSH_LOG(SSH_LOG_WARNING, "Other side initiating key re-exchange");
} else if(session->session_state != SSH_SESSION_STATE_INITIAL_KEX){
ssh_set_error(session,SSH_FATAL,"SSH_KEXINIT received in wrong state");
goto error;
}
if (hashbufin_add_cookie(session, session->next_crypto->client_kex.cookie) < 0) {
ssh_set_error(session, SSH_FATAL, "ssh_packet_kexinit: adding cookie failed");
goto error;
}
} else {
if (buffer_get_data(packet,session->next_crypto->server_kex.cookie,16) != 16) {
ssh_set_error(session, SSH_FATAL, "ssh_packet_kexinit: no cookie in packet");
goto error;
}
if (hashbufin_add_cookie(session, session->next_crypto->server_kex.cookie) < 0) {
ssh_set_error(session, SSH_FATAL, "ssh_packet_kexinit: adding cookie failed");
goto error;
}
}
for (i = 0; i < KEX_METHODS_SIZE; i++) {
str = buffer_get_ssh_string(packet);
if (str == NULL) {
break;
}
if (buffer_add_ssh_string(session->in_hashbuf, str) < 0) {
ssh_set_error(session, SSH_FATAL, "Error adding string in hash buffer");
goto error;
if (server_kex) {
rc = buffer_get_data(packet,session->next_crypto->client_kex.cookie, 16);
if (rc != 16) {
ssh_set_error(session, SSH_FATAL, "ssh_packet_kexinit: no cookie in packet");
goto error;
}
rc = hashbufin_add_cookie(session, session->next_crypto->client_kex.cookie);
if (rc < 0) {
ssh_set_error(session, SSH_FATAL, "ssh_packet_kexinit: adding cookie failed");
goto error;
}
} else {
rc = buffer_get_data(packet,session->next_crypto->server_kex.cookie, 16);
if (rc != 16) {
ssh_set_error(session, SSH_FATAL, "ssh_packet_kexinit: no cookie in packet");
goto error;
}
rc = hashbufin_add_cookie(session, session->next_crypto->server_kex.cookie);
if (rc < 0) {
ssh_set_error(session, SSH_FATAL, "ssh_packet_kexinit: adding cookie failed");
goto error;
}
}
strings[i] = ssh_string_to_char(str);
if (strings[i] == NULL) {
ssh_set_error_oom(session);
goto error;
}
ssh_string_free(str);
str = NULL;
}
for (i = 0; i < KEX_METHODS_SIZE; i++) {
str = buffer_get_ssh_string(packet);
if (str == NULL) {
break;
}
/* copy the server kex info into an array of strings */
if (server_kex) {
for (i = 0; i < SSH_KEX_METHODS; i++) {
session->next_crypto->client_kex.methods[i] = strings[i];
}
} else { /* client */
for (i = 0; i < SSH_KEX_METHODS; i++) {
session->next_crypto->server_kex.methods[i] = strings[i];
}
}
rc = buffer_add_ssh_string(session->in_hashbuf, str);
if (rc < 0) {
ssh_set_error(session, SSH_FATAL, "Error adding string in hash buffer");
goto error;
}
strings[i] = ssh_string_to_char(str);
if (strings[i] == NULL) {
ssh_set_error_oom(session);
goto error;
}
ssh_string_free(str);
str = NULL;
}
/* copy the server kex info into an array of strings */
if (server_kex) {
for (i = 0; i < SSH_KEX_METHODS; i++) {
session->next_crypto->client_kex.methods[i] = strings[i];
}
} else { /* client */
for (i = 0; i < SSH_KEX_METHODS; i++) {
session->next_crypto->server_kex.methods[i] = strings[i];
}
}
/*
* Handle the two final fields for the KEXINIT message (RFC 4253 7.1):
*
* boolean first_kex_packet_follows
* uint32 0 (reserved for future extension)
*
* Notably if clients set 'first_kex_packet_follows', it is expected
* that its value is included when computing the session ID (see
* 'make_sessionid').
*/
if (server_kex) {
rc = buffer_get_u8(packet, &first_kex_packet_follows);
if (rc != 1) {
goto error;
}
rc = buffer_add_u8(session->in_hashbuf, first_kex_packet_follows);
if (rc < 0) {
goto error;
}
rc = buffer_add_u32(session->in_hashbuf, kexinit_reserved);
if (rc < 0) {
goto error;
}
/*
* Remember whether 'first_kex_packet_follows' was set and the client
* guess was wrong: in this case the next SSH_MSG_KEXDH_INIT message
* must be ignored.
*/
if (first_kex_packet_follows) {
session->first_kex_follows_guess_wrong =
is_first_kex_packet_follows_guess_wrong(session->next_crypto->client_kex.methods[SSH_KEX],
session->next_crypto->server_kex.methods[SSH_KEX]);
}
}
session->session_state = SSH_SESSION_STATE_KEXINIT_RECEIVED;
session->dh_handshake_state = DH_STATE_INIT;
session->ssh_connection_callback(session);
return SSH_PACKET_USED;
session->session_state=SSH_SESSION_STATE_KEXINIT_RECEIVED;
session->dh_handshake_state=DH_STATE_INIT;
session->ssh_connection_callback(session);
return SSH_PACKET_USED;
error:
ssh_string_free(str);
for (i = 0; i < SSH_KEX_METHODS; i++) {
SAFE_FREE(strings[i]);
}
ssh_string_free(str);
for (i = 0; i < SSH_KEX_METHODS; i++) {
SAFE_FREE(strings[i]);
}
session->session_state = SSH_SESSION_STATE_ERROR;
session->session_state = SSH_SESSION_STATE_ERROR;
return SSH_PACKET_USED;
return SSH_PACKET_USED;
}
void ssh_list_kex(struct ssh_kex_struct *kex) {
@ -373,6 +467,53 @@ void ssh_list_kex(struct ssh_kex_struct *kex) {
}
}
/**
* @internal
* @brief selects the hostkey mechanisms to be chosen for the key exchange,
* as some hostkey mechanisms may be present in known_hosts file and preferred
* @returns a cstring containing a comma-separated list of hostkey methods.
* NULL if no method matches
*/
static char *ssh_client_select_hostkeys(ssh_session session){
char methods_buffer[128]={0};
static const char *preferred_hostkeys[]={"ecdsa-sha2-nistp521","ecdsa-sha2-nistp384",
"ecdsa-sha2-nistp256", "ssh-rsa", "ssh-dss", "ssh-rsa1", NULL};
char **methods;
int i,j;
int needcoma=0;
methods = ssh_knownhosts_algorithms(session);
if (methods == NULL || methods[0] == NULL){
SAFE_FREE(methods);
return NULL;
}
for (i=0;preferred_hostkeys[i] != NULL; ++i){
for (j=0; methods[j] != NULL; ++j){
if(strcmp(preferred_hostkeys[i], methods[j]) == 0){
if (verify_existing_algo(SSH_HOSTKEYS, methods[j])){
if(needcoma)
strncat(methods_buffer,",",sizeof(methods_buffer)-strlen(methods_buffer)-1);
strncat(methods_buffer, methods[j], sizeof(methods_buffer)-strlen(methods_buffer)-1);
needcoma = 1;
}
}
}
}
for(i=0;methods[i]!= NULL; ++i){
SAFE_FREE(methods[i]);
}
SAFE_FREE(methods);
if(strlen(methods_buffer) > 0){
SSH_LOG(SSH_LOG_DEBUG, "Changing host key method to \"%s\"", methods_buffer);
return strdup(methods_buffer);
} else {
SSH_LOG(SSH_LOG_DEBUG, "No supported kex method for existing key in known_hosts file");
return NULL;
}
}
/**
* @brief sets the key exchange parameters to be sent to the server,
* in function of the options and available methods.
@ -385,6 +526,13 @@ int set_client_kex(ssh_session session){
ssh_get_random(client->cookie, 16, 0);
memset(client->methods, 0, KEX_METHODS_SIZE * sizeof(char **));
/* first check if we have specific host key methods */
if(session->opts.wanted_methods[SSH_HOSTKEYS] == NULL){
/* Only if no override */
session->opts.wanted_methods[SSH_HOSTKEYS] =
ssh_client_select_hostkeys(session);
}
for (i = 0; i < KEX_METHODS_SIZE; i++) {
wanted = session->opts.wanted_methods[i];
if (wanted == NULL)
@ -434,14 +582,15 @@ int ssh_send_kex(ssh_session session, int server_kex) {
&session->next_crypto->client_kex);
ssh_string str = NULL;
int i;
int rc;
if (buffer_add_u8(session->out_buffer, SSH2_MSG_KEXINIT) < 0) {
rc = ssh_buffer_pack(session->out_buffer,
"bP",
SSH2_MSG_KEXINIT,
16,
kex->cookie); /* cookie */
if (rc != SSH_OK)
goto error;
}
if (buffer_add_data(session->out_buffer, kex->cookie, 16) < 0) {
goto error;
}
if (hashbufout_add_cookie(session) < 0) {
goto error;
}
@ -464,10 +613,11 @@ int ssh_send_kex(ssh_session session, int server_kex) {
str = NULL;
}
if (buffer_add_u8(session->out_buffer, 0) < 0) {
goto error;
}
if (buffer_add_u32(session->out_buffer, 0) < 0) {
rc = ssh_buffer_pack(session->out_buffer,
"bd",
0,
0);
if (rc != SSH_OK) {
goto error;
}
@ -477,8 +627,8 @@ int ssh_send_kex(ssh_session session, int server_kex) {
return 0;
error:
buffer_reinit(session->out_buffer);
buffer_reinit(session->out_hashbuf);
ssh_buffer_reinit(session->out_buffer);
ssh_buffer_reinit(session->out_hashbuf);
ssh_string_free(str);
return -1;

6
libssh/src/kex1.c
View File

@ -417,7 +417,7 @@ SSH_PACKET_CALLBACK(ssh_packet_publickey1){
if (buffer_add_u8(session->out_buffer, support_3DES ? SSH_CIPHER_3DES : SSH_CIPHER_DES) < 0) {
goto error;
}
if (buffer_add_data(session->out_buffer, session->next_crypto->server_kex.cookie, 8) < 0) {
if (ssh_buffer_add_data(session->out_buffer, session->next_crypto->server_kex.cookie, 8) < 0) {
goto error;
}
@ -431,10 +431,10 @@ SSH_PACKET_CALLBACK(ssh_packet_publickey1){
bits, ssh_string_len(enc_session));
bits = htons(bits);
/* the encrypted mpint */
if (buffer_add_data(session->out_buffer, &bits, sizeof(uint16_t)) < 0) {
if (ssh_buffer_add_data(session->out_buffer, &bits, sizeof(uint16_t)) < 0) {
goto error;
}
if (buffer_add_data(session->out_buffer, ssh_string_data(enc_session),
if (ssh_buffer_add_data(session->out_buffer, ssh_string_data(enc_session),
ssh_string_len(enc_session)) < 0) {
goto error;
}

104
libssh/src/known_hosts.c
View File

@ -4,7 +4,7 @@
* This file is part of the SSH Library
*
* Copyright (c) 2003-2009 by Aris Adamantiadis
* Copyright (c) 2009 by Andreas Schneider <mail@cynapses.org>
* Copyright (c) 2009 by Andreas Schneider <asn@cryptomilk.org>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -34,7 +34,7 @@
#include "libssh/misc.h"
#include "libssh/pki.h"
#include "libssh/options.h"
#include "libssh/knownhosts.h"
/*todo: remove this include */
#include "libssh/string.h"
@ -239,9 +239,9 @@ static int check_public_key(ssh_session session, char **tokens) {
/* TODO: fix the hardcoding */
tmpstring->size = htonl(len);
#ifdef HAVE_LIBGCRYPT
bignum_bn2bin(tmpbn, len, string_data(tmpstring));
bignum_bn2bin(tmpbn, len, ssh_string_data(tmpstring));
#elif defined HAVE_LIBCRYPTO
bignum_bn2bin(tmpbn, string_data(tmpstring));
bignum_bn2bin(tmpbn, ssh_string_data(tmpstring));
#endif
bignum_free(tmpbn);
if (buffer_add_ssh_string(pubkey_buffer, tmpstring) < 0) {
@ -647,6 +647,102 @@ int ssh_write_knownhost(ssh_session session) {
return 0;
}
#define KNOWNHOSTS_MAXTYPES 10
/**
* @internal
* @brief Check which kind of host keys should be preferred for connection
* by reading the known_hosts file.
*
* @param[in] session The SSH session to use.
*
* @returns array of supported key types
* NULL on error
*/
char **ssh_knownhosts_algorithms(ssh_session session) {
FILE *file = NULL;
char **tokens;
char *host;
char *hostport;
const char *type;
int match;
char **array;
int i=0, j;
if (session->opts.knownhosts == NULL) {
if (ssh_options_apply(session) < 0) {
ssh_set_error(session, SSH_REQUEST_DENIED,
"Can't find a known_hosts file");
return NULL;
}
}
if (session->opts.host == NULL) {
return NULL;
}
host = ssh_lowercase(session->opts.host);
hostport = ssh_hostport(host, session->opts.port);
array = malloc(sizeof(char *) * KNOWNHOSTS_MAXTYPES);
if (host == NULL || hostport == NULL || array == NULL) {
ssh_set_error_oom(session);
SAFE_FREE(host);
SAFE_FREE(hostport);
SAFE_FREE(array);
return NULL;
}
do {
tokens = ssh_get_knownhost_line(&file,
session->opts.knownhosts, &type);
/* End of file, return the current state */
if (tokens == NULL) {
break;
}
match = match_hashed_host(host, tokens[0]);
if (match == 0){
match = match_hostname(hostport, tokens[0], strlen(tokens[0]));
}
if (match == 0) {
match = match_hostname(host, tokens[0], strlen(tokens[0]));
}
if (match == 0) {
match = match_hashed_host(hostport, tokens[0]);
}
if (match) {
/* We got a match. Now check the key type */
SSH_LOG(SSH_LOG_DEBUG, "server %s:%d has %s in known_hosts",
host, session->opts.port, type);
/* don't copy more than once */
for(j=0;j<i && match;++j){
if(strcmp(array[j], type)==0)
match=0;
}
if (match){
array[i] = strdup(type);
i++;
if(i>= KNOWNHOSTS_MAXTYPES-1){
tokens_free(tokens);
break;
}
}
}
tokens_free(tokens);
} while (1);
array[i]=NULL;
SAFE_FREE(host);
SAFE_FREE(hostport);
if (file != NULL) {
fclose(file);
}
/* Return the current state at end of file */
return array;
}
/** @} */
/* vim: set ts=4 sw=4 et cindent: */

8
libssh/src/legacy.c
View File

@ -163,7 +163,7 @@ int channel_change_pty_size(ssh_channel channel,int cols,int rows){
}
ssh_channel channel_forward_accept(ssh_session session, int timeout_ms){
return ssh_forward_accept(session,timeout_ms);
return ssh_channel_accept_forward(session, timeout_ms, NULL);
}
int channel_close(ssh_channel channel){
@ -171,12 +171,12 @@ int channel_close(ssh_channel channel){
}
int channel_forward_cancel(ssh_session session, const char *address, int port){
return ssh_forward_cancel(session, address, port);
return ssh_channel_cancel_forward(session, address, port);
}
int channel_forward_listen(ssh_session session, const char *address,
int port, int *bound_port){
return ssh_forward_listen(session, address, port, bound_port);
return ssh_channel_listen_forward(session, address, port, bound_port);
}
void channel_free(ssh_channel channel){
@ -580,7 +580,7 @@ int ssh_publickey_to_file(ssh_session session,
ssh_set_error(session, SSH_FATAL, "Invalid parameters");
return SSH_ERROR;
}
pubkey_64 = bin_to_base64(string_data(pubkey), ssh_string_len(pubkey));
pubkey_64 = bin_to_base64(ssh_string_data(pubkey), ssh_string_len(pubkey));
if (pubkey_64 == NULL) {
return SSH_ERROR;
}

84
libssh/src/libcrypto.c
View File

@ -23,6 +23,7 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include "libssh/priv.h"
#include "libssh/session.h"
@ -38,6 +39,8 @@
#include <openssl/rsa.h>
#include <openssl/hmac.h>
#include <openssl/opensslv.h>
#include <openssl/rand.h>
#ifdef HAVE_OPENSSL_AES_H
#define HAS_AES
#include <openssl/aes.h>
@ -62,6 +65,8 @@ struct ssh_mac_ctx_struct {
union {
SHACTX sha1_ctx;
SHA256CTX sha256_ctx;
SHA384CTX sha384_ctx;
SHA512CTX sha512_ctx;
} ctx;
};
@ -74,6 +79,12 @@ static int alloc_key(struct ssh_cipher_struct *cipher) {
return 0;
}
void ssh_reseed(void){
struct timeval tv;
gettimeofday(&tv, NULL);
RAND_add(&tv, sizeof(tv), 0.0);
}
SHACTX sha1_init(void) {
SHACTX c = malloc(sizeof(*c));
if (c == NULL) {
@ -172,6 +183,52 @@ void sha256(unsigned char *digest, int len, unsigned char *hash) {
SHA256(digest, len, hash);
}
SHA384CTX sha384_init(void){
SHA384CTX c = malloc(sizeof(*c));
if (c == NULL) {
return NULL;
}
SHA384_Init(c);
return c;
}
void sha384_update(SHA384CTX c, const void *data, unsigned long len){
SHA384_Update(c,data,len);
}
void sha384_final(unsigned char *md, SHA384CTX c) {
SHA384_Final(md, c);
SAFE_FREE(c);
}
void sha384(unsigned char *digest, int len, unsigned char *hash) {
SHA384(digest, len, hash);
}
SHA512CTX sha512_init(void){
SHA512CTX c = malloc(sizeof(*c));
if (c == NULL) {
return NULL;
}
SHA512_Init(c);
return c;
}
void sha512_update(SHA512CTX c, const void *data, unsigned long len){
SHA512_Update(c,data,len);
}
void sha512_final(unsigned char *md, SHA512CTX c) {
SHA512_Final(md, c);
SAFE_FREE(c);
}
void sha512(unsigned char *digest, int len, unsigned char *hash) {
SHA512(digest, len, hash);
}
MD5CTX md5_init(void) {
MD5CTX c = malloc(sizeof(*c));
if (c == NULL) {
@ -193,7 +250,11 @@ void md5_final(unsigned char *md, MD5CTX c) {
}
ssh_mac_ctx ssh_mac_ctx_init(enum ssh_mac_e type){
ssh_mac_ctx ctx=malloc(sizeof(struct ssh_mac_ctx_struct));
ssh_mac_ctx ctx = malloc(sizeof(struct ssh_mac_ctx_struct));
if (ctx == NULL) {
return NULL;
}
ctx->mac_type=type;
switch(type){
case SSH_MAC_SHA1:
@ -203,7 +264,11 @@ ssh_mac_ctx ssh_mac_ctx_init(enum ssh_mac_e type){
ctx->ctx.sha256_ctx = sha256_init();
return ctx;
case SSH_MAC_SHA384:
ctx->ctx.sha384_ctx = sha384_init();
return ctx;
case SSH_MAC_SHA512:
ctx->ctx.sha512_ctx = sha512_init();
return ctx;
default:
SAFE_FREE(ctx);
return NULL;
@ -219,7 +284,11 @@ void ssh_mac_update(ssh_mac_ctx ctx, const void *data, unsigned long len) {
sha256_update(ctx->ctx.sha256_ctx, data, len);
break;
case SSH_MAC_SHA384:
sha384_update(ctx->ctx.sha384_ctx, data, len);
break;
case SSH_MAC_SHA512:
sha512_update(ctx->ctx.sha512_ctx, data, len);
break;
default:
break;
}
@ -234,7 +303,11 @@ void ssh_mac_final(unsigned char *md, ssh_mac_ctx ctx) {
sha256_final(md,ctx->ctx.sha256_ctx);
break;
case SSH_MAC_SHA384:
sha384_final(md,ctx->ctx.sha384_ctx);
break;
case SSH_MAC_SHA512:
sha512_final(md,ctx->ctx.sha512_ctx);
break;
default:
break;
}
@ -257,6 +330,15 @@ HMACCTX hmac_init(const void *key, int len, enum ssh_hmac_e type) {
case SSH_HMAC_SHA1:
HMAC_Init(ctx, key, len, EVP_sha1());
break;
case SSH_HMAC_SHA256:
HMAC_Init(ctx, key, len, EVP_sha256());
break;
case SSH_HMAC_SHA384:
HMAC_Init(ctx, key, len, EVP_sha384());
break;
case SSH_HMAC_SHA512:
HMAC_Init(ctx, key, len, EVP_sha512());
break;
case SSH_HMAC_MD5:
HMAC_Init(ctx, key, len, EVP_md5());
break;

127
libssh/src/libgcrypt.c
View File

@ -45,6 +45,9 @@ static int alloc_key(struct ssh_cipher_struct *cipher) {
return 0;
}
void ssh_reseed(void){
}
SHACTX sha1_init(void) {
SHACTX ctx = NULL;
gcry_md_open(&ctx, GCRY_MD_SHA1, 0);
@ -66,10 +69,69 @@ void sha1(unsigned char *digest, int len, unsigned char *hash) {
gcry_md_hash_buffer(GCRY_MD_SHA1, hash, digest, len);
}
SHA256CTX sha256_init(void) {
SHA256CTX ctx = NULL;
gcry_md_open(&ctx, GCRY_MD_SHA256, 0);
return ctx;
}
void sha256_update(SHACTX c, const void *data, unsigned long len) {
gcry_md_write(c, data, len);
}
void sha256_final(unsigned char *md, SHACTX c) {
gcry_md_final(c);
memcpy(md, gcry_md_read(c, 0), SHA256_DIGEST_LEN);
gcry_md_close(c);
}
void sha256(unsigned char *digest, int len, unsigned char *hash){
gcry_md_hash_buffer(GCRY_MD_SHA256, hash, digest, len);
}
SHA384CTX sha384_init(void) {
SHA384CTX ctx = NULL;
gcry_md_open(&ctx, GCRY_MD_SHA384, 0);
return ctx;
}
void sha384_update(SHACTX c, const void *data, unsigned long len) {
gcry_md_write(c, data, len);
}
void sha384_final(unsigned char *md, SHACTX c) {
gcry_md_final(c);
memcpy(md, gcry_md_read(c, 0), SHA384_DIGEST_LEN);
gcry_md_close(c);
}
void sha384(unsigned char *digest, int len, unsigned char *hash) {
gcry_md_hash_buffer(GCRY_MD_SHA384, hash, digest, len);
}
SHA512CTX sha512_init(void) {
SHA512CTX ctx = NULL;
gcry_md_open(&ctx, GCRY_MD_SHA512, 0);
return ctx;
}
void sha512_update(SHACTX c, const void *data, unsigned long len) {
gcry_md_write(c, data, len);
}
void sha512_final(unsigned char *md, SHACTX c) {
gcry_md_final(c);
memcpy(md, gcry_md_read(c, 0), SHA512_DIGEST_LEN);
gcry_md_close(c);
}
void sha512(unsigned char *digest, int len, unsigned char *hash) {
gcry_md_hash_buffer(GCRY_MD_SHA512, hash, digest, len);
}
MD5CTX md5_init(void) {
MD5CTX c = NULL;
gcry_md_open(&c, GCRY_MD_MD5, 0);
@ -88,7 +150,11 @@ void md5_final(unsigned char *md, MD5CTX c) {
}
ssh_mac_ctx ssh_mac_ctx_init(enum ssh_mac_e type){
ssh_mac_ctx ctx=malloc(sizeof(struct ssh_mac_ctx_struct));
ssh_mac_ctx ctx = malloc(sizeof(struct ssh_mac_ctx_struct));
if (ctx == NULL) {
return NULL;
}
ctx->mac_type=type;
switch(type){
case SSH_MAC_SHA1:
@ -121,13 +187,13 @@ void ssh_mac_final(unsigned char *md, ssh_mac_ctx ctx) {
len=SHA_DIGEST_LEN;
break;
case SSH_MAC_SHA256:
len=SHA256_DIGEST_LENGTH;
len=SHA256_DIGEST_LEN;
break;
case SSH_MAC_SHA384:
len=SHA384_DIGEST_LENGTH;
len=SHA384_DIGEST_LEN;
break;
case SSH_MAC_SHA512:
len=SHA512_DIGEST_LENGTH;
len=SHA512_DIGEST_LEN;
break;
}
gcry_md_final(ctx->ctx);
@ -143,6 +209,15 @@ HMACCTX hmac_init(const void *key, int len, enum ssh_hmac_e type) {
case SSH_HMAC_SHA1:
gcry_md_open(&c, GCRY_MD_SHA1, GCRY_MD_FLAG_HMAC);
break;
case SSH_HMAC_SHA256:
gcry_md_open(&c, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
break;
case SSH_HMAC_SHA384:
gcry_md_open(&c, GCRY_MD_SHA384, GCRY_MD_FLAG_HMAC);
break;
case SSH_HMAC_SHA512:
gcry_md_open(&c, GCRY_MD_SHA512, GCRY_MD_FLAG_HMAC);
break;
case SSH_HMAC_MD5:
gcry_md_open(&c, GCRY_MD_MD5, GCRY_MD_FLAG_HMAC);
break;
@ -403,8 +478,8 @@ static struct ssh_cipher_struct ssh_ciphertab[] = {
.keysize = 128,
.set_encrypt_key = blowfish_set_key,
.set_decrypt_key = blowfish_set_key,
.cbc_encrypt = blowfish_encrypt,
.cbc_decrypt = blowfish_decrypt
.encrypt = blowfish_encrypt,
.decrypt = blowfish_decrypt
},
{
.name = "aes128-ctr",
@ -414,8 +489,8 @@ static struct ssh_cipher_struct ssh_ciphertab[] = {
.keysize = 128,
.set_encrypt_key = aes_set_key,
.set_decrypt_key = aes_set_key,
.cbc_encrypt = aes_encrypt,
.cbc_decrypt = aes_encrypt
.encrypt = aes_encrypt,
.decrypt = aes_encrypt
},
{
.name = "aes192-ctr",
@ -425,8 +500,8 @@ static struct ssh_cipher_struct ssh_ciphertab[] = {
.keysize = 192,
.set_encrypt_key = aes_set_key,
.set_decrypt_key = aes_set_key,
.cbc_encrypt = aes_encrypt,
.cbc_decrypt = aes_encrypt
.encrypt = aes_encrypt,
.decrypt = aes_encrypt
},
{
.name = "aes256-ctr",
@ -436,8 +511,8 @@ static struct ssh_cipher_struct ssh_ciphertab[] = {
.keysize = 256,
.set_encrypt_key = aes_set_key,
.set_decrypt_key = aes_set_key,
.cbc_encrypt = aes_encrypt,
.cbc_decrypt = aes_encrypt
.encrypt = aes_encrypt,
.decrypt = aes_encrypt
},
{
.name = "aes128-cbc",
@ -447,8 +522,8 @@ static struct ssh_cipher_struct ssh_ciphertab[] = {
.keysize = 128,
.set_encrypt_key = aes_set_key,
.set_decrypt_key = aes_set_key,
.cbc_encrypt = aes_encrypt,
.cbc_decrypt = aes_decrypt
.encrypt = aes_encrypt,
.decrypt = aes_decrypt
},
{
.name = "aes192-cbc",
@ -458,8 +533,8 @@ static struct ssh_cipher_struct ssh_ciphertab[] = {
.keysize = 192,
.set_encrypt_key = aes_set_key,
.set_decrypt_key = aes_set_key,
.cbc_encrypt = aes_encrypt,
.cbc_decrypt = aes_decrypt
.encrypt = aes_encrypt,
.decrypt = aes_decrypt
},
{
.name = "aes256-cbc",
@ -469,8 +544,8 @@ static struct ssh_cipher_struct ssh_ciphertab[] = {
.keysize = 256,
.set_encrypt_key = aes_set_key,
.set_decrypt_key = aes_set_key,
.cbc_encrypt = aes_encrypt,
.cbc_decrypt = aes_decrypt
.encrypt = aes_encrypt,
.decrypt = aes_decrypt
},
{
.name = "3des-cbc",
@ -480,8 +555,8 @@ static struct ssh_cipher_struct ssh_ciphertab[] = {
.keysize = 192,
.set_encrypt_key = des3_set_key,
.set_decrypt_key = des3_set_key,
.cbc_encrypt = des3_encrypt,
.cbc_decrypt = des3_decrypt
.encrypt = des3_encrypt,
.decrypt = des3_decrypt
},
{
.name = "3des-cbc-ssh1",
@ -491,8 +566,8 @@ static struct ssh_cipher_struct ssh_ciphertab[] = {
.keysize = 192,
.set_encrypt_key = des3_1_set_key,
.set_decrypt_key = des3_1_set_key,
.cbc_encrypt = des3_1_encrypt,
.cbc_decrypt = des3_1_decrypt
.encrypt = des3_1_encrypt,
.decrypt = des3_1_decrypt
},
{
.name = "des-cbc-ssh1",
@ -502,8 +577,8 @@ static struct ssh_cipher_struct ssh_ciphertab[] = {
.keysize = 64,
.set_encrypt_key = des1_set_key,
.set_decrypt_key = des1_set_key,
.cbc_encrypt = des1_1_encrypt,
.cbc_decrypt = des1_1_decrypt
.encrypt = des1_1_encrypt,
.decrypt = des1_1_decrypt
},
{
.name = NULL,
@ -513,8 +588,8 @@ static struct ssh_cipher_struct ssh_ciphertab[] = {
.keysize = 0,
.set_encrypt_key = NULL,
.set_decrypt_key = NULL,
.cbc_encrypt = NULL,
.cbc_decrypt = NULL
.encrypt = NULL,
.decrypt = NULL
}
};

6
libssh/src/log.c
View File

@ -3,7 +3,7 @@
*
* This file is part of the SSH Library
*
* Copyright (c) 2008 by Aris Adamantiadis
* Copyright (c) 2008-2013 by Aris Adamantiadis
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -215,6 +215,10 @@ ssh_logging_callback ssh_get_log_callback(void) {
*/
void *ssh_get_log_userdata(void)
{
if (ssh_log_userdata == NULL) {
return NULL;
}
return ssh_log_userdata;
}

601
libssh/src/messages.c
View File

@ -3,7 +3,7 @@
*
* This file is part of the SSH Library
*
* Copyright (c) 2003-2009 by Aris Adamantiadis
* Copyright (c) 2003-2013 by Aris Adamantiadis
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -208,8 +208,8 @@ static int ssh_execute_server_request(ssh_session session, ssh_message msg)
ssh_callbacks_exists(channel->callbacks, channel_pty_window_change_function)) {
rc = channel->callbacks->channel_pty_window_change_function(session,
channel,
msg->channel_request.height, msg->channel_request.width,
msg->channel_request.pxheight, msg->channel_request.pxwidth,
msg->channel_request.width, msg->channel_request.height,
msg->channel_request.pxwidth, msg->channel_request.pxheight,
channel->callbacks->userdata);
} else if (msg->channel_request.type == SSH_CHANNEL_REQUEST_EXEC &&
ssh_callbacks_exists(channel->callbacks, channel_exec_request_function)) {
@ -508,8 +508,7 @@ void ssh_message_free(ssh_message msg){
case SSH_REQUEST_AUTH:
SAFE_FREE(msg->auth_request.username);
if (msg->auth_request.password) {
memset(msg->auth_request.password, 0,
strlen(msg->auth_request.password));
BURN_STRING(msg->auth_request.password);
SAFE_FREE(msg->auth_request.password);
}
ssh_key_free(msg->auth_request.pubkey);
@ -586,104 +585,34 @@ static ssh_buffer ssh_msg_userauth_build_digest(ssh_session session,
session->current_crypto ? session->current_crypto :
session->next_crypto;
ssh_buffer buffer;
ssh_string str;
ssh_string str=NULL;
int rc;
buffer = ssh_buffer_new();
if (buffer == NULL) {
return NULL;
}
/* Add session id */
str = ssh_string_new(crypto->digest_len);
if (str == NULL) {
ssh_buffer_free(buffer);
return NULL;
}
ssh_string_fill(str, crypto->session_id, crypto->digest_len);
rc = buffer_add_ssh_string(buffer, str);
string_free(str);
if (rc < 0) {
ssh_buffer_free(buffer);
return NULL;
}
/* Add the type */
rc = buffer_add_u8(buffer, SSH2_MSG_USERAUTH_REQUEST);
if (rc < 0) {
ssh_buffer_free(buffer);
return NULL;
}
/* Add the username */
str = ssh_string_from_char(msg->auth_request.username);
if (str == NULL) {
ssh_buffer_free(buffer);
return NULL;
}
rc = buffer_add_ssh_string(buffer, str);
string_free(str);
if (rc < 0) {
ssh_buffer_free(buffer);
return NULL;
}
/* Add the service name */
str = ssh_string_from_char(service);
if (str == NULL) {
ssh_buffer_free(buffer);
return NULL;
}
rc = buffer_add_ssh_string(buffer, str);
string_free(str);
if (rc < 0) {
ssh_buffer_free(buffer);
return NULL;
}
/* Add the method (publickey) */
str = ssh_string_from_char("publickey");
if (str == NULL) {
ssh_buffer_free(buffer);
return NULL;
}
rc = buffer_add_ssh_string(buffer, str);
string_free(str);
if (rc < 0) {
ssh_buffer_free(buffer);
return NULL;
}
/* Has been signed (TRUE) */
rc = buffer_add_u8(buffer, 1);
if (rc < 0) {
ssh_buffer_free(buffer);
return NULL;
}
/* Add the public key algorithm */
str = ssh_string_from_char(msg->auth_request.pubkey->type_c);
if (str == NULL) {
ssh_buffer_free(buffer);
return NULL;
}
rc = buffer_add_ssh_string(buffer, str);
string_free(str);
if (rc < 0) {
ssh_buffer_free(buffer);
return NULL;
}
/* Add the publickey as blob */
rc = ssh_pki_export_pubkey_blob(msg->auth_request.pubkey, &str);
if (rc < 0) {
ssh_buffer_free(buffer);
return NULL;
}
rc = buffer_add_ssh_string(buffer, str);
string_free(str);
if (rc < 0) {
rc = ssh_buffer_pack(buffer,
"dPbsssbsS",
crypto->digest_len, /* session ID string */
(size_t)crypto->digest_len, crypto->session_id,
SSH2_MSG_USERAUTH_REQUEST, /* type */
msg->auth_request.username,
service,
"publickey", /* method */
1, /* has to be signed (true) */
msg->auth_request.pubkey->type_c, /* pubkey algorithm */
str); /* public key as a blob */
ssh_string_free(str);
if (rc != SSH_OK) {
ssh_set_error_oom(session);
ssh_buffer_free(buffer);
return NULL;
}
@ -698,11 +627,10 @@ static ssh_buffer ssh_msg_userauth_build_digest(ssh_session session,
* SSH Message
*/
SSH_PACKET_CALLBACK(ssh_packet_userauth_request){
ssh_string str;
ssh_message msg = NULL;
char *service = NULL;
char *method = NULL;
uint32_t method_size = 0;
int rc;
(void)user;
(void)type;
@ -713,35 +641,13 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_request){
goto error;
}
msg->type = SSH_REQUEST_AUTH;
rc = ssh_buffer_unpack(packet,
"sss",
&msg->auth_request.username,
&service,
&method);
str = buffer_get_ssh_string(packet);
if (str == NULL) {
goto error;
}
msg->auth_request.username = ssh_string_to_char(str);
ssh_string_free(str);
if (msg->auth_request.username == NULL) {
goto error;
}
str = buffer_get_ssh_string(packet);
if (str == NULL) {
goto error;
}
service = ssh_string_to_char(str);
ssh_string_free(str);
if (service == NULL) {
goto error;
}
str = buffer_get_ssh_string(packet);
if (str == NULL) {
goto error;
}
method = ssh_string_to_char(str);
method_size = ssh_string_len(str);
ssh_string_free(str);
if (method == NULL) {
if (rc != SSH_OK) {
goto error;
}
@ -751,32 +657,23 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_request){
msg->auth_request.username);
if (strncmp(method, "none", method_size) == 0) {
if (strcmp(method, "none") == 0) {
msg->auth_request.method = SSH_AUTH_METHOD_NONE;
goto end;
}
if (strncmp(method, "password", method_size) == 0) {
ssh_string pass = NULL;
if (strcmp(method, "password") == 0) {
uint8_t tmp;
msg->auth_request.method = SSH_AUTH_METHOD_PASSWORD;
buffer_get_u8(packet, &tmp);
pass = buffer_get_ssh_string(packet);
if (pass == NULL) {
goto error;
}
msg->auth_request.password = ssh_string_to_char(pass);
ssh_string_burn(pass);
ssh_string_free(pass);
pass = NULL;
if (msg->auth_request.password == NULL) {
rc = ssh_buffer_unpack(packet, "bs", &tmp, &msg->auth_request.password);
if (rc != SSH_OK) {
goto error;
}
goto end;
}
if (strncmp(method, "keyboard-interactive", method_size) == 0) {
if (strcmp(method, "keyboard-interactive") == 0) {
ssh_string lang = NULL;
ssh_string submethods = NULL;
@ -806,23 +703,20 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_request){
goto end;
}
if (strncmp(method, "publickey", method_size) == 0) {
if (strcmp(method, "publickey") == 0) {
ssh_string algo = NULL;
ssh_string pubkey_blob = NULL;
uint8_t has_sign;
int rc;
msg->auth_request.method = SSH_AUTH_METHOD_PUBLICKEY;
SAFE_FREE(method);
buffer_get_u8(packet, &has_sign);
algo = buffer_get_ssh_string(packet);
if (algo == NULL) {
goto error;
}
pubkey_blob = buffer_get_ssh_string(packet);
if (pubkey_blob == NULL) {
ssh_string_free(algo);
algo = NULL;
rc = ssh_buffer_unpack(packet, "bSS",
&has_sign,
&algo,
&pubkey_blob
);
if (rc != SSH_OK) {
goto error;
}
ssh_string_free(algo);
@ -877,7 +771,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_request){
goto end;
}
#ifdef WITH_GSSAPI
if (strncmp(method, "gssapi-with-mic", method_size) == 0) {
if (strcmp(method, "gssapi-with-mic") == 0) {
uint32_t n_oid;
ssh_string *oids;
ssh_string oid;
@ -966,6 +860,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_info_response){
uint32_t nanswers;
uint32_t i;
ssh_string tmp;
int rc;
ssh_message msg = NULL;
@ -993,7 +888,11 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_info_response){
msg->auth_request.username = NULL;
#endif
buffer_get_u32(packet, &nanswers);
rc = ssh_buffer_unpack(packet, "d", &nanswers);
if (rc != SSH_OK) {
ssh_set_error_invalid(session);
goto error;
}
if (session->kbdint == NULL) {
SSH_LOG(SSH_LOG_PROTOCOL, "Warning: Got a keyboard-interactive "
@ -1007,7 +906,6 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_info_response){
}
}
nanswers = ntohl(nanswers);
SSH_LOG(SSH_LOG_PACKET,"kbdint: %d answers",nanswers);
if (nanswers > KBDINT_MAX_PROMPT) {
ssh_set_error(session, SSH_FATAL,
@ -1071,9 +969,9 @@ error:
SSH_PACKET_CALLBACK(ssh_packet_channel_open){
ssh_message msg = NULL;
ssh_string type_s = NULL, originator = NULL, destination = NULL;
char *type_c = NULL;
uint32_t sender, window, packet_size, originator_port, destination_port;
uint32_t originator_port, destination_port;
int rc;
(void)type;
(void)user;
@ -1084,30 +982,18 @@ SSH_PACKET_CALLBACK(ssh_packet_channel_open){
}
msg->type = SSH_REQUEST_CHANNEL_OPEN;
type_s = buffer_get_ssh_string(packet);
if (type_s == NULL) {
ssh_set_error_oom(session);
goto error;
}
type_c = ssh_string_to_char(type_s);
if (type_c == NULL) {
ssh_set_error_oom(session);
goto error;
rc = ssh_buffer_unpack(packet, "s", &type_c);
if (rc != SSH_OK){
goto error;
}
SSH_LOG(SSH_LOG_PACKET,
"Clients wants to open a %s channel", type_c);
ssh_string_free(type_s);
type_s=NULL;
buffer_get_u32(packet, &sender);
buffer_get_u32(packet, &window);
buffer_get_u32(packet, &packet_size);
msg->channel_request_open.sender = ntohl(sender);
msg->channel_request_open.window = ntohl(window);
msg->channel_request_open.packet_size = ntohl(packet_size);
ssh_buffer_unpack(packet,"ddd",
&msg->channel_request_open.sender,
&msg->channel_request_open.window,
&msg->channel_request_open.packet_size);
if (session->session_state != SSH_SESSION_STATE_AUTHENTICATED){
ssh_set_error(session,SSH_FATAL, "Invalid state when receiving channel open request (must be authenticated)");
@ -1121,96 +1007,46 @@ SSH_PACKET_CALLBACK(ssh_packet_channel_open){
}
if (strcmp(type_c,"direct-tcpip") == 0) {
destination = buffer_get_ssh_string(packet);
if (destination == NULL) {
ssh_set_error_oom(session);
rc = ssh_buffer_unpack(packet,
"sdsd",
&msg->channel_request_open.destination,
&destination_port,
&msg->channel_request_open.originator,
&originator_port);
if (rc != SSH_OK) {
goto error;
}
msg->channel_request_open.destination = ssh_string_to_char(destination);
if (msg->channel_request_open.destination == NULL) {
ssh_set_error_oom(session);
ssh_string_free(destination);
goto error;
}
ssh_string_free(destination);
buffer_get_u32(packet, &destination_port);
msg->channel_request_open.destination_port = (uint16_t) ntohl(destination_port);
originator = buffer_get_ssh_string(packet);
if (originator == NULL) {
ssh_set_error_oom(session);
goto error;
}
msg->channel_request_open.originator = ssh_string_to_char(originator);
if (msg->channel_request_open.originator == NULL) {
ssh_set_error_oom(session);
ssh_string_free(originator);
goto error;
}
ssh_string_free(originator);
buffer_get_u32(packet, &originator_port);
msg->channel_request_open.originator_port = (uint16_t) ntohl(originator_port);
msg->channel_request_open.destination_port = (uint16_t) destination_port;
msg->channel_request_open.originator_port = (uint16_t) originator_port;
msg->channel_request_open.type = SSH_CHANNEL_DIRECT_TCPIP;
goto end;
}
if (strcmp(type_c,"forwarded-tcpip") == 0) {
destination = buffer_get_ssh_string(packet);
if (destination == NULL) {
ssh_set_error_oom(session);
goto error;
}
msg->channel_request_open.destination = ssh_string_to_char(destination);
if (msg->channel_request_open.destination == NULL) {
ssh_set_error_oom(session);
ssh_string_free(destination);
goto error;
}
ssh_string_free(destination);
buffer_get_u32(packet, &destination_port);
msg->channel_request_open.destination_port = (uint16_t) ntohl(destination_port);
originator = buffer_get_ssh_string(packet);
if (originator == NULL) {
ssh_set_error_oom(session);
goto error;
}
msg->channel_request_open.originator = ssh_string_to_char(originator);
if (msg->channel_request_open.originator == NULL) {
ssh_set_error_oom(session);
ssh_string_free(originator);
goto error;
}
ssh_string_free(originator);
buffer_get_u32(packet, &originator_port);
msg->channel_request_open.originator_port = (uint16_t) ntohl(originator_port);
rc = ssh_buffer_unpack(packet, "sdsd",
&msg->channel_request_open.destination,
&destination_port,
&msg->channel_request_open.originator,
&originator_port
);
if (rc != SSH_OK){
goto error;
}
msg->channel_request_open.destination_port = (uint16_t) destination_port;
msg->channel_request_open.originator_port = (uint16_t) originator_port;
msg->channel_request_open.type = SSH_CHANNEL_FORWARDED_TCPIP;
goto end;
}
if (strcmp(type_c,"x11") == 0) {
originator = buffer_get_ssh_string(packet);
if (originator == NULL) {
ssh_set_error_oom(session);
goto error;
}
msg->channel_request_open.originator = ssh_string_to_char(originator);
if (msg->channel_request_open.originator == NULL) {
ssh_set_error_oom(session);
ssh_string_free(originator);
goto error;
}
ssh_string_free(originator);
buffer_get_u32(packet, &originator_port);
msg->channel_request_open.originator_port = (uint16_t) ntohl(originator_port);
rc = ssh_buffer_unpack(packet, "sd",
&msg->channel_request_open.originator,
&originator_port);
if (rc != SSH_OK){
goto error;
}
msg->channel_request_open.originator_port = (uint16_t) originator_port;
msg->channel_request_open.type = SSH_CHANNEL_X11;
goto end;
}
@ -1222,8 +1058,6 @@ error:
ssh_message_free(msg);
msg=NULL;
end:
if(type_s != NULL)
ssh_string_free(type_s);
SAFE_FREE(type_c);
if(msg != NULL)
ssh_message_queue(session,msg);
@ -1249,28 +1083,15 @@ int ssh_message_channel_request_open_reply_accept_channel(ssh_message msg, ssh_c
chan->remote_window = msg->channel_request_open.window;
chan->state = SSH_CHANNEL_STATE_OPEN;
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
if (rc < 0) {
return SSH_ERROR;
}
rc = buffer_add_u32(session->out_buffer, htonl(chan->remote_channel));
if (rc < 0) {
return SSH_ERROR;
}
rc =buffer_add_u32(session->out_buffer, htonl(chan->local_channel));
if (rc < 0) {
return SSH_ERROR;
}
rc = buffer_add_u32(session->out_buffer, htonl(chan->local_window));
if (rc < 0) {
return SSH_ERROR;
}
rc = buffer_add_u32(session->out_buffer, htonl(chan->local_maxpacket));
if (rc < 0) {
rc = ssh_buffer_pack(session->out_buffer,
"bdddd",
SSH2_MSG_CHANNEL_OPEN_CONFIRMATION,
chan->remote_channel,
chan->local_channel,
chan->local_window,
chan->local_maxpacket);
if (rc != SSH_OK) {
ssh_set_error_oom(session);
return SSH_ERROR;
}
@ -1327,6 +1148,7 @@ ssh_channel ssh_message_channel_request_open_reply_accept(ssh_message msg) {
int ssh_message_handle_channel_request(ssh_session session, ssh_channel channel, ssh_buffer packet,
const char *request, uint8_t want_reply) {
ssh_message msg = NULL;
int rc;
msg = ssh_message_new(session);
if (msg == NULL) {
@ -1343,36 +1165,18 @@ int ssh_message_handle_channel_request(ssh_session session, ssh_channel channel,
msg->channel_request.want_reply = want_reply;
if (strcmp(request, "pty-req") == 0) {
ssh_string term = NULL;
char *term_c = NULL;
term = buffer_get_ssh_string(packet);
if (term == NULL) {
ssh_set_error_oom(session);
goto error;
}
term_c = ssh_string_to_char(term);
if (term_c == NULL) {
ssh_set_error_oom(session);
ssh_string_free(term);
goto error;
}
ssh_string_free(term);
rc = ssh_buffer_unpack(packet, "sddddS",
&msg->channel_request.TERM,
&msg->channel_request.width,
&msg->channel_request.height,
&msg->channel_request.pxwidth,
&msg->channel_request.pxheight,
&msg->channel_request.modes
);
msg->channel_request.type = SSH_CHANNEL_REQUEST_PTY;
msg->channel_request.TERM = term_c;
buffer_get_u32(packet, &msg->channel_request.width);
buffer_get_u32(packet, &msg->channel_request.height);
buffer_get_u32(packet, &msg->channel_request.pxwidth);
buffer_get_u32(packet, &msg->channel_request.pxheight);
msg->channel_request.width = ntohl(msg->channel_request.width);
msg->channel_request.height = ntohl(msg->channel_request.height);
msg->channel_request.pxwidth = ntohl(msg->channel_request.pxwidth);
msg->channel_request.pxheight = ntohl(msg->channel_request.pxheight);
msg->channel_request.modes = buffer_get_ssh_string(packet);
if (msg->channel_request.modes == NULL) {
SAFE_FREE(term_c);
if (rc != SSH_OK) {
goto error;
}
goto end;
@ -1380,39 +1184,24 @@ int ssh_message_handle_channel_request(ssh_session session, ssh_channel channel,
if (strcmp(request, "window-change") == 0) {
msg->channel_request.type = SSH_CHANNEL_REQUEST_WINDOW_CHANGE;
buffer_get_u32(packet, &msg->channel_request.width);
buffer_get_u32(packet, &msg->channel_request.height);
buffer_get_u32(packet, &msg->channel_request.pxwidth);
buffer_get_u32(packet, &msg->channel_request.pxheight);
msg->channel_request.width = ntohl(msg->channel_request.width);
msg->channel_request.height = ntohl(msg->channel_request.height);
msg->channel_request.pxwidth = ntohl(msg->channel_request.pxwidth);
msg->channel_request.pxheight = ntohl(msg->channel_request.pxheight);
rc = ssh_buffer_unpack(packet, "dddd",
&msg->channel_request.width,
&msg->channel_request.height,
&msg->channel_request.pxwidth,
&msg->channel_request.pxheight);
if (rc != SSH_OK){
goto error;
}
goto end;
}
if (strcmp(request, "subsystem") == 0) {
ssh_string subsys = NULL;
char *subsys_c = NULL;
subsys = buffer_get_ssh_string(packet);
if (subsys == NULL) {
ssh_set_error_oom(session);
goto error;
}
subsys_c = ssh_string_to_char(subsys);
if (subsys_c == NULL) {
ssh_set_error_oom(session);
ssh_string_free(subsys);
goto error;
}
ssh_string_free(subsys);
rc = ssh_buffer_unpack(packet, "s",
&msg->channel_request.subsystem);
msg->channel_request.type = SSH_CHANNEL_REQUEST_SUBSYSTEM;
msg->channel_request.subsystem = subsys_c;
if (rc != SSH_OK){
goto error;
}
goto end;
}
@ -1422,82 +1211,37 @@ int ssh_message_handle_channel_request(ssh_session session, ssh_channel channel,
}
if (strcmp(request, "exec") == 0) {
ssh_string cmd = NULL;
cmd = buffer_get_ssh_string(packet);
if (cmd == NULL) {
ssh_set_error_oom(session);
goto error;
}
rc = ssh_buffer_unpack(packet, "s",
&msg->channel_request.command);
msg->channel_request.type = SSH_CHANNEL_REQUEST_EXEC;
msg->channel_request.command = ssh_string_to_char(cmd);
ssh_string_free(cmd);
if (msg->channel_request.command == NULL) {
if (rc != SSH_OK) {
goto error;
}
goto end;
}
if (strcmp(request, "env") == 0) {
ssh_string name = NULL;
ssh_string value = NULL;
name = buffer_get_ssh_string(packet);
if (name == NULL) {
ssh_set_error_oom(session);
goto error;
}
value = buffer_get_ssh_string(packet);
if (value == NULL) {
ssh_set_error_oom(session);
ssh_string_free(name);
goto error;
}
rc = ssh_buffer_unpack(packet, "ss",
&msg->channel_request.var_name,
&msg->channel_request.var_value);
msg->channel_request.type = SSH_CHANNEL_REQUEST_ENV;
msg->channel_request.var_name = ssh_string_to_char(name);
msg->channel_request.var_value = ssh_string_to_char(value);
if (msg->channel_request.var_name == NULL ||
msg->channel_request.var_value == NULL) {
ssh_string_free(name);
ssh_string_free(value);
if (rc != SSH_OK) {
goto error;
}
ssh_string_free(name);
ssh_string_free(value);
goto end;
}
if (strcmp(request, "x11-req") == 0) {
ssh_string auth_protocol = NULL;
ssh_string auth_cookie = NULL;
buffer_get_u8(packet, &msg->channel_request.x11_single_connection);
auth_protocol = buffer_get_ssh_string(packet);
if (auth_protocol == NULL) {
ssh_set_error_oom(session);
goto error;
}
auth_cookie = buffer_get_ssh_string(packet);
if (auth_cookie == NULL) {
ssh_set_error_oom(session);
ssh_string_free(auth_protocol);
goto error;
}
rc = ssh_buffer_unpack(packet, "bssd",
&msg->channel_request.x11_single_connection,
&msg->channel_request.x11_auth_protocol,
&msg->channel_request.x11_auth_cookie,
&msg->channel_request.x11_screen_number);
msg->channel_request.type = SSH_CHANNEL_REQUEST_X11;
msg->channel_request.x11_auth_protocol = ssh_string_to_char(auth_protocol);
msg->channel_request.x11_auth_cookie = ssh_string_to_char(auth_cookie);
if (msg->channel_request.x11_auth_protocol == NULL ||
msg->channel_request.x11_auth_cookie == NULL) {
ssh_string_free(auth_protocol);
ssh_string_free(auth_cookie);
if (rc != SSH_OK) {
goto error;
}
ssh_string_free(auth_protocol);
ssh_string_free(auth_cookie);
buffer_get_u32(packet, &msg->channel_request.x11_screen_number);
goto end;
}
@ -1515,6 +1259,7 @@ error:
int ssh_message_channel_request_reply_success(ssh_message msg) {
uint32_t channel;
int rc;
if (msg == NULL) {
return SSH_ERROR;
@ -1526,10 +1271,12 @@ int ssh_message_channel_request_reply_success(ssh_message msg) {
SSH_LOG(SSH_LOG_PACKET,
"Sending a channel_request success to channel %d", channel);
if (buffer_add_u8(msg->session->out_buffer, SSH2_MSG_CHANNEL_SUCCESS) < 0) {
return SSH_ERROR;
}
if (buffer_add_u32(msg->session->out_buffer, htonl(channel)) < 0) {
rc = ssh_buffer_pack(msg->session->out_buffer,
"bd",
SSH2_MSG_CHANNEL_SUCCESS,
channel);
if (rc != SSH_OK){
ssh_set_error_oom(msg->session);
return SSH_ERROR;
}
@ -1545,72 +1292,65 @@ int ssh_message_channel_request_reply_success(ssh_message msg) {
#ifdef WITH_SERVER
SSH_PACKET_CALLBACK(ssh_packet_global_request){
ssh_message msg = NULL;
ssh_string request_s=NULL;
char *request=NULL;
ssh_string bind_addr_s=NULL;
char *bind_addr=NULL;
uint32_t bind_port;
uint8_t want_reply;
int rc = SSH_PACKET_USED;
int r;
(void)user;
(void)type;
(void)packet;
request_s = buffer_get_ssh_string(packet);
if (request_s != NULL) {
request = ssh_string_to_char(request_s);
ssh_string_free(request_s);
}
buffer_get_u8(packet, &want_reply);
SSH_LOG(SSH_LOG_PROTOCOL,"Received SSH_MSG_GLOBAL_REQUEST packet");
r = ssh_buffer_unpack(packet, "sb",
&request,
&want_reply);
if (r != SSH_OK){
goto error;
}
msg = ssh_message_new(session);
if (msg == NULL) {
ssh_string_free_char(request);
return SSH_PACKET_NOT_USED;
ssh_set_error_oom(session);
goto error;
}
msg->type = SSH_REQUEST_GLOBAL;
if (request && strcmp(request, "tcpip-forward") == 0) {
bind_addr_s = buffer_get_ssh_string(packet);
if (bind_addr_s != NULL) {
bind_addr = ssh_string_to_char(bind_addr_s);
ssh_string_free(bind_addr_s);
if (strcmp(request, "tcpip-forward") == 0) {
r = ssh_buffer_unpack(packet, "sd",
&msg->global_request.bind_address,
&msg->global_request.bind_port
);
if (r != SSH_OK){
goto error;
}
buffer_get_u32(packet, &bind_port);
bind_port = ntohl(bind_port);
msg->global_request.type = SSH_GLOBAL_REQUEST_TCPIP_FORWARD;
msg->global_request.want_reply = want_reply;
msg->global_request.bind_address = bind_addr;
msg->global_request.bind_port = bind_port;
SSH_LOG(SSH_LOG_PROTOCOL, "Received SSH_MSG_GLOBAL_REQUEST %s %d %s:%d", request, want_reply, bind_addr, bind_port);
SSH_LOG(SSH_LOG_PROTOCOL, "Received SSH_MSG_GLOBAL_REQUEST %s %d %s:%d", request, want_reply,
msg->global_request.bind_address,
msg->global_request.bind_port);
if(ssh_callbacks_exists(session->common.callbacks, global_request_function)) {
SSH_LOG(SSH_LOG_PROTOCOL, "Calling callback for SSH_MSG_GLOBAL_REQUEST %s %d %s:%d", request, want_reply, bind_addr, bind_port);
SSH_LOG(SSH_LOG_PROTOCOL, "Calling callback for SSH_MSG_GLOBAL_REQUEST %s %d %s:%d", request,
want_reply, msg->global_request.bind_address,
msg->global_request.bind_port);
session->common.callbacks->global_request_function(session, msg, session->common.callbacks->userdata);
} else {
ssh_message_reply_default(msg);
}
} else if (request && strcmp(request, "cancel-tcpip-forward") == 0) {
bind_addr_s = buffer_get_ssh_string(packet);
if (bind_addr_s != NULL) {
bind_addr = ssh_string_to_char(bind_addr_s);
ssh_string_free(bind_addr_s);
} else if (strcmp(request, "cancel-tcpip-forward") == 0) {
r = ssh_buffer_unpack(packet, "sd",
&msg->global_request.bind_address,
&msg->global_request.bind_port);
if (r != SSH_OK){
goto error;
}
buffer_get_u32(packet, &bind_port);
bind_port = ntohl(bind_port);
msg->global_request.type = SSH_GLOBAL_REQUEST_CANCEL_TCPIP_FORWARD;
msg->global_request.want_reply = want_reply;
msg->global_request.bind_address = bind_addr;
msg->global_request.bind_port = bind_port;
SSH_LOG(SSH_LOG_PROTOCOL, "Received SSH_MSG_GLOBAL_REQUEST %s %d %s:%d", request, want_reply, bind_addr, bind_port);
SSH_LOG(SSH_LOG_PROTOCOL, "Received SSH_MSG_GLOBAL_REQUEST %s %d %s:%d", request, want_reply,
msg->global_request.bind_address,
msg->global_request.bind_port);
if(ssh_callbacks_exists(session->common.callbacks, global_request_function)) {
session->common.callbacks->global_request_function(session, msg, session->common.callbacks->userdata);
@ -1624,9 +1364,12 @@ SSH_PACKET_CALLBACK(ssh_packet_global_request){
SAFE_FREE(msg);
SAFE_FREE(request);
SAFE_FREE(bind_addr);
return rc;
error:
SAFE_FREE(msg);
SAFE_FREE(request);
SSH_LOG(SSH_LOG_WARNING, "Invalid SSH_MSG_GLOBAL_REQUEST packet");
return SSH_PACKET_NOT_USED;
}
#endif /* WITH_SERVER */

3
libssh/src/misc.c
View File

@ -4,7 +4,7 @@
* This file is part of the SSH Library
*
* Copyright (c) 2003-2009 by Aris Adamantiadis
* Copyright (c) 2008-2009 by Andreas Schneider <mail@cynapses.org>
* Copyright (c) 2008-2009 by Andreas Schneider <asn@cryptomilk.org>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -697,7 +697,6 @@ char *ssh_path_expand_tilde(const char *d) {
}
char *ssh_path_expand_escape(ssh_session session, const char *s) {
#define MAX_BUF_SIZE 4096
char host[NI_MAXHOST];
char buf[MAX_BUF_SIZE];
char *r, *x = NULL;

288
libssh/src/options.c
View File

@ -4,7 +4,7 @@
* This file is part of the SSH Library
*
* Copyright (c) 2003-2008 by Aris Adamantiadis
* Copyright (c) 2009 by Andreas Schneider <mail@cynapses.org>
* Copyright (c) 2009-2013 by Andreas Schneider <asn@cryptomilk.org>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -136,7 +136,7 @@ int ssh_options_copy(ssh_session src, ssh_session *dest) {
}
}
for (i = 0; i < 10; ++i) {
for (i = 0; i < 10; i++) {
if (src->opts.wanted_methods[i]) {
new->opts.wanted_methods[i] = strdup(src->opts.wanted_methods[i]);
if (new->opts.wanted_methods[i] == NULL) {
@ -367,6 +367,18 @@ int ssh_options_set_algo(ssh_session session, int algo,
* Set the command to be executed in order to connect to
* server (const char *).
*
* - SSH_OPTIONS_GSSAPI_SERVER_IDENTITY
* Set it to specify the GSSAPI server identity that libssh
* should expect when connecting to the server (const char *).
*
* - SSH_OPTIONS_GSSAPI_CLIENT_IDENTITY
* Set it to specify the GSSAPI client identity that libssh
* should expect when connecting to the server (const char *).
*
* - SSH_OPTIONS_GSSAPI_DELEGATE_CREDENTIALS
* Set it to specify that GSSAPI should delegate credentials
* to the server (int, 0 = false).
*
* @param value The value to set. This is a generic pointer and the
* datatype which is used should be set according to the
* type set.
@ -661,6 +673,7 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
}
session->common.log_verbosity = i & 0xffff;
ssh_set_log_level(i & 0xffff);
}
break;
case SSH_OPTIONS_CIPHERS_C_S:
@ -703,6 +716,26 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
return -1;
}
break;
case SSH_OPTIONS_HMAC_C_S:
v = value;
if (v == NULL || v[0] == '\0') {
ssh_set_error_invalid(session);
return -1;
} else {
if (ssh_options_set_algo(session, SSH_MAC_C_S, v) < 0)
return -1;
}
break;
case SSH_OPTIONS_HMAC_S_C:
v = value;
if (v == NULL || v[0] == '\0') {
ssh_set_error_invalid(session);
return -1;
} else {
if (ssh_options_set_algo(session, SSH_MAC_S_C, v) < 0)
return -1;
}
break;
case SSH_OPTIONS_COMPRESSION_C_S:
v = value;
if (v == NULL || v[0] == '\0') {
@ -792,6 +825,45 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
}
}
break;
case SSH_OPTIONS_GSSAPI_SERVER_IDENTITY:
v = value;
if (v == NULL || v[0] == '\0') {
ssh_set_error_invalid(session);
return -1;
} else {
SAFE_FREE(session->opts.gss_server_identity);
session->opts.gss_server_identity = strdup(v);
if (session->opts.gss_server_identity == NULL) {
ssh_set_error_oom(session);
return -1;
}
}
break;
case SSH_OPTIONS_GSSAPI_CLIENT_IDENTITY:
v = value;
if (v == NULL || v[0] == '\0') {
ssh_set_error_invalid(session);
return -1;
} else {
SAFE_FREE(session->opts.gss_client_identity);
session->opts.gss_client_identity = strdup(v);
if (session->opts.gss_client_identity == NULL) {
ssh_set_error_oom(session);
return -1;
}
}
break;
case SSH_OPTIONS_GSSAPI_DELEGATE_CREDENTIALS:
if (value == NULL) {
ssh_set_error_invalid(session);
return -1;
} else {
int x = *(int *)value;
session->opts.gss_delegate_creds = (x & 0xff);
}
break;
default:
ssh_set_error(session, SSH_REQUEST_DENIED, "Unknown ssh option %d", type);
return -1;
@ -1232,84 +1304,93 @@ int ssh_options_apply(ssh_session session) {
* @addtogroup libssh_server
* @{
*/
static int ssh_bind_options_set_algo(ssh_bind sshbind, int algo,
const char *list) {
if (!verify_existing_algo(algo, list)) {
ssh_set_error(sshbind, SSH_REQUEST_DENIED,
"Setting method: no algorithm for method \"%s\" (%s)\n",
ssh_kex_get_description(algo), list);
return -1;
}
SAFE_FREE(sshbind->wanted_methods[algo]);
sshbind->wanted_methods[algo] = strdup(list);
if (sshbind->wanted_methods[algo] == NULL) {
ssh_set_error_oom(sshbind);
return -1;
}
return 0;
static int ssh_bind_set_key(ssh_bind sshbind, char **key_loc,
const void *value) {
if (value == NULL) {
ssh_set_error_invalid(sshbind);
return -1;
} else {
SAFE_FREE(*key_loc);
*key_loc = strdup(value);
if (*key_loc == NULL) {
ssh_set_error_oom(sshbind);
return -1;
}
}
return 0;
}
/**
* @brief This function can set all possible ssh bind options.
* @brief Set options for an SSH server bind.
*
* @param sshbind An allocated ssh bind structure.
* @param sshbind The ssh server bind to configure.
*
* @param type The option type to set. This could be one of the
* @param type The option type to set. This should be one of the
* following:
*
* SSH_BIND_OPTIONS_LOG_VERBOSITY:
* Set the session logging verbosity (integer).
* - SSH_BIND_OPTIONS_HOSTKEY:
* Set the path to an ssh host key, regardless
* of type. Only one key from per key type
* (RSA, DSA, ECDSA) is allowed in an ssh_bind
* at a time, and later calls to this function
* with this option for the same key type will
* override prior calls (const char *).
*
* The verbosity of the messages. Every log smaller or
* equal to verbosity will be shown.
* SSH_LOG_NOLOG: No logging
* SSH_LOG_RARE: Rare conditions or warnings
* SSH_LOG_ENTRY: API-accessible entrypoints
* SSH_LOG_PACKET: Packet id and size
* SSH_LOG_FUNCTIONS: Function entering and leaving
* - SSH_BIND_OPTIONS_BINDADDR:
* Set the IP address to bind (const char *).
*
* SSH_BIND_OPTIONS_LOG_VERBOSITY_STR:
* Set the session logging verbosity (integer).
* - SSH_BIND_OPTIONS_BINDPORT:
* Set the port to bind (unsigned int *).
*
* The verbosity of the messages. Every log smaller or
* equal to verbosity will be shown.
* SSH_LOG_NOLOG: No logging
* SSH_LOG_RARE: Rare conditions or warnings
* SSH_LOG_ENTRY: API-accessible entrypoints
* SSH_LOG_PACKET: Packet id and size
* SSH_LOG_FUNCTIONS: Function entering and leaving
* - SSH_BIND_OPTIONS_BINDPORT_STR:
* Set the port to bind (const char *).
*
* SSH_BIND_OPTIONS_BINDADDR:
* Set the bind address.
* - SSH_BIND_OPTIONS_LOG_VERBOSITY:
* Set the session logging verbosity (int *).
* The logging verbosity should have one of the
* following values, which are listed in order
* of increasing verbosity. Every log message
* with verbosity less than or equal to the
* logging verbosity will be shown.
* - SSH_LOG_NOLOG: No logging
* - SSH_LOG_RARE: Rare conditions or warnings
* - SSH_LOG_ENTRY: API-accessible entrypoints
* - SSH_LOG_PACKET: Packet id and size
* - SSH_LOG_FUNCTIONS: Function entering and leaving
*
* SSH_BIND_OPTIONS_BINDPORT:
* Set the bind port, default is 22.
* - SSH_BIND_OPTIONS_LOG_VERBOSITY_STR:
* Set the session logging verbosity via a
* string that will be converted to a numerical
* value (e.g. "3") and interpreted according
* to the values of
* SSH_BIND_OPTIONS_LOG_VERBOSITY above (const
* char *).
*
* SSH_BIND_OPTIONS_HOSTKEY:
* Set the server public key type: ssh-rsa or ssh-dss
* (string).
* - SSH_BIND_OPTIONS_DSAKEY:
* Set the path to the ssh host dsa key, SSHv2
* only (const char *).
*
* SSH_BIND_OPTIONS_DSAKEY:
* Set the path to the dsa ssh host key (string).
* - SSH_BIND_OPTIONS_RSAKEY:
* Set the path to the ssh host rsa key, SSHv2
* only (const char *).
*
* SSH_BIND_OPTIONS_RSAKEY:
* Set the path to the ssh host rsa key (string).
* - SSH_BIND_OPTIONS_ECDSAKEY:
* Set the path to the ssh host ecdsa key,
* SSHv2 only (const char *).
*
* SSH_BIND_OPTIONS_BANNER:
* Set the server banner sent to clients (string).
* - SSH_BIND_OPTIONS_BANNER:
* Set the server banner sent to clients (const char *).
*
* @param value The value to set. This is a generic pointer and the
* datatype which is used should be set according to the
* type set.
* datatype which should be used is described at the
* corresponding value of type above.
*
* @return 0 on success, < 0 on error.
* @return 0 on success, < 0 on error, invalid option, or parameter.
*/
int ssh_bind_options_set(ssh_bind sshbind, enum ssh_bind_options_e type,
const void *value) {
char *p, *q;
int i;
int i, rc;
if (sshbind == NULL) {
return -1;
@ -1321,8 +1402,57 @@ int ssh_bind_options_set(ssh_bind sshbind, enum ssh_bind_options_e type,
ssh_set_error_invalid(sshbind);
return -1;
} else {
if (ssh_bind_options_set_algo(sshbind, SSH_HOSTKEYS, value) < 0)
return -1;
int key_type;
ssh_key key;
ssh_key *bind_key_loc = NULL;
char **bind_key_path_loc;
rc = ssh_pki_import_privkey_file(value, NULL, NULL, NULL, &key);
if (rc != SSH_OK) {
return -1;
}
key_type = ssh_key_type(key);
switch (key_type) {
case SSH_KEYTYPE_DSS:
bind_key_loc = &sshbind->dsa;
bind_key_path_loc = &sshbind->dsakey;
break;
case SSH_KEYTYPE_ECDSA:
#ifdef HAVE_ECC
bind_key_loc = &sshbind->ecdsa;
bind_key_path_loc = &sshbind->ecdsakey;
#else
ssh_set_error(sshbind,
SSH_FATAL,
"ECDSA key used and libssh compiled "
"without ECDSA support");
#endif
break;
case SSH_KEYTYPE_RSA:
case SSH_KEYTYPE_RSA1:
bind_key_loc = &sshbind->rsa;
bind_key_path_loc = &sshbind->rsakey;
break;
default:
ssh_set_error(sshbind,
SSH_FATAL,
"Unsupported key type %d", key_type);
}
if (bind_key_loc == NULL) {
ssh_key_free(key);
return -1;
}
/* Set the location of the key on disk even though we don't
need it in case some other function wants it */
rc = ssh_bind_set_key(sshbind, bind_key_path_loc, value);
if (rc < 0) {
ssh_key_free(key);
return -1;
}
ssh_key_free(*bind_key_loc);
*bind_key_loc = key;
}
break;
case SSH_BIND_OPTIONS_BINDADDR:
@ -1376,7 +1506,7 @@ int ssh_bind_options_set(ssh_bind sshbind, enum ssh_bind_options_e type,
break;
case SSH_BIND_OPTIONS_LOG_VERBOSITY_STR:
if (value == NULL) {
sshbind->common.log_verbosity = 0;
ssh_set_log_level(0);
} else {
q = strdup(value);
if (q == NULL) {
@ -1389,35 +1519,27 @@ int ssh_bind_options_set(ssh_bind sshbind, enum ssh_bind_options_e type,
}
SAFE_FREE(q);
sshbind->common.log_verbosity = i & 0xffff;
ssh_set_log_level(i & 0xffff);
}
break;
case SSH_BIND_OPTIONS_DSAKEY:
if (value == NULL) {
ssh_set_error_invalid(sshbind);
return -1;
} else {
SAFE_FREE(sshbind->dsakey);
sshbind->dsakey = strdup(value);
if (sshbind->dsakey == NULL) {
ssh_set_error_oom(sshbind);
return -1;
rc = ssh_bind_set_key(sshbind, &sshbind->dsakey, value);
if (rc < 0) {
return -1;
}
}
break;
break;
case SSH_BIND_OPTIONS_RSAKEY:
if (value == NULL) {
ssh_set_error_invalid(sshbind);
return -1;
} else {
SAFE_FREE(sshbind->rsakey);
sshbind->rsakey = strdup(value);
if (sshbind->rsakey == NULL) {
ssh_set_error_oom(sshbind);
return -1;
rc = ssh_bind_set_key(sshbind, &sshbind->rsakey, value);
if (rc < 0) {
return -1;
}
}
break;
break;
case SSH_BIND_OPTIONS_ECDSAKEY:
rc = ssh_bind_set_key(sshbind, &sshbind->ecdsakey, value);
if (rc < 0) {
return -1;
}
break;
case SSH_BIND_OPTIONS_BANNER:
if (value == NULL) {
ssh_set_error_invalid(sshbind);

421
libssh/src/packet.c
View File

@ -3,7 +3,7 @@
*
* This file is part of the SSH Library
*
* Copyright (c) 2003-2008 by Aris Adamantiadis
* Copyright (c) 2003-2013 by Aris Adamantiadis
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -48,8 +48,6 @@
#include "libssh/auth.h"
#include "libssh/gssapi.h"
#define MACSIZE SHA_DIGEST_LEN
static ssh_packet_callback default_packet_handlers[]= {
ssh_packet_disconnect_callback, // SSH2_MSG_DISCONNECT 1
ssh_packet_ignore_callback, // SSH2_MSG_IGNORE 2
@ -141,174 +139,225 @@ static ssh_packet_callback default_packet_handlers[]= {
* @len length of data received. It might not be enough for a complete packet
* @returns number of bytes read and processed.
*/
int ssh_packet_socket_callback(const void *data, size_t receivedlen, void *user){
ssh_session session=(ssh_session) user;
unsigned int blocksize = (session->current_crypto ?
session->current_crypto->in_cipher->blocksize : 8);
int current_macsize = session->current_crypto ? MACSIZE : 0;
unsigned char mac[30] = {0};
char buffer[16] = {0};
const void *packet = NULL;
int to_be_read;
int rc;
uint32_t len, compsize, payloadsize;
uint8_t padding;
size_t processed=0; /* number of byte processed from the callback */
int ssh_packet_socket_callback(const void *data, size_t receivedlen, void *user)
{
ssh_session session= (ssh_session) user;
unsigned int blocksize = (session->current_crypto ?
session->current_crypto->in_cipher->blocksize : 8);
unsigned char mac[DIGEST_MAX_LEN] = {0};
char buffer[16] = {0};
size_t current_macsize = 0;
const uint8_t *packet;
int to_be_read;
int rc;
uint32_t len, compsize, payloadsize;
uint8_t padding;
size_t processed = 0; /* number of byte processed from the callback */
if (data == NULL) {
goto error;
}
if(session->current_crypto != NULL) {
current_macsize = hmac_digest_len(session->current_crypto->in_hmac);
}
if (session->session_state == SSH_SESSION_STATE_ERROR)
goto error;
switch(session->packet_state) {
case PACKET_STATE_INIT:
if(receivedlen < blocksize){
/* We didn't receive enough data to read at least one block size, give up */
return 0;
}
memset(&session->in_packet, 0, sizeof(PACKET));
if (session->in_buffer) {
if (buffer_reinit(session->in_buffer) < 0) {
goto error;
}
} else {
session->in_buffer = ssh_buffer_new();
if (session->in_buffer == NULL) {
goto error;
}
}
memcpy(buffer,data,blocksize);
processed += blocksize;
len = packet_decrypt_len(session, buffer);
if (buffer_add_data(session->in_buffer, buffer, blocksize) < 0) {
if (data == NULL) {
goto error;
}
}
if(len > MAX_PACKET_LEN) {
ssh_set_error(session, SSH_FATAL,
"read_packet(): Packet len too high(%u %.4x)", len, len);
if (session->session_state == SSH_SESSION_STATE_ERROR) {
goto error;
}
}
to_be_read = len - blocksize + sizeof(uint32_t);
if (to_be_read < 0) {
/* remote sshd sends invalid sizes? */
ssh_set_error(session, SSH_FATAL,
"given numbers of bytes left to be read < 0 (%d)!", to_be_read);
goto error;
}
switch(session->packet_state) {
case PACKET_STATE_INIT:
if (receivedlen < blocksize) {
/*
* We didn't receive enough data to read at least one
* block size, give up
*/
return 0;
}
/* saves the status of the current operations */
session->in_packet.len = len;
session->packet_state = PACKET_STATE_SIZEREAD;
/* FALL TROUGH */
case PACKET_STATE_SIZEREAD:
len = session->in_packet.len;
to_be_read = len - blocksize + sizeof(uint32_t) + current_macsize;
/* if to_be_read is zero, the whole packet was blocksize bytes. */
if (to_be_read != 0) {
if(receivedlen - processed < (unsigned int)to_be_read){
/* give up, not enough data in buffer */
SSH_LOG(SSH_LOG_PACKET,"packet: partial packet (read len) [len=%d]",len);
return processed;
}
memset(&session->in_packet, 0, sizeof(PACKET));
packet = ((unsigned char *)data) + processed;
// ssh_socket_read(session->socket,packet,to_be_read-current_macsize);
if (session->in_buffer) {
rc = ssh_buffer_reinit(session->in_buffer);
if (rc < 0) {
goto error;
}
} else {
session->in_buffer = ssh_buffer_new();
if (session->in_buffer == NULL) {
goto error;
}
}
if (buffer_add_data(session->in_buffer, packet,
to_be_read - current_macsize) < 0) {
goto error;
}
processed += to_be_read - current_macsize;
}
memcpy(buffer, data, blocksize);
processed += blocksize;
len = packet_decrypt_len(session, buffer);
if (session->current_crypto) {
/*
* decrypt the rest of the packet (blocksize bytes already
* have been decrypted)
*/
if (packet_decrypt(session,
((uint8_t*)buffer_get_rest(session->in_buffer) + blocksize),
buffer_get_rest_len(session->in_buffer) - blocksize) < 0) {
ssh_set_error(session, SSH_FATAL, "Decrypt error");
goto error;
}
/* copy the last part from the incoming buffer */
memcpy(mac,(unsigned char *)packet + to_be_read - current_macsize, MACSIZE);
rc = ssh_buffer_add_data(session->in_buffer, buffer, blocksize);
if (rc < 0) {
goto error;
}
if (packet_hmac_verify(session, session->in_buffer, mac) < 0) {
ssh_set_error(session, SSH_FATAL, "HMAC error");
goto error;
}
processed += current_macsize;
}
if (len > MAX_PACKET_LEN) {
ssh_set_error(session,
SSH_FATAL,
"read_packet(): Packet len too high(%u %.4x)",
len, len);
goto error;
}
/* skip the size field which has been processed before */
buffer_pass_bytes(session->in_buffer, sizeof(uint32_t));
to_be_read = len - blocksize + sizeof(uint32_t);
if (to_be_read < 0) {
/* remote sshd sends invalid sizes? */
ssh_set_error(session,
SSH_FATAL,
"Given numbers of bytes left to be read < 0 (%d)!",
to_be_read);
goto error;
}
if (buffer_get_u8(session->in_buffer, &padding) == 0) {
ssh_set_error(session, SSH_FATAL, "Packet too short to read padding");
goto error;
}
/* Saves the status of the current operations */
session->in_packet.len = len;
session->packet_state = PACKET_STATE_SIZEREAD;
/* FALL TROUGH */
case PACKET_STATE_SIZEREAD:
len = session->in_packet.len;
to_be_read = len - blocksize + sizeof(uint32_t) + current_macsize;
/* if to_be_read is zero, the whole packet was blocksize bytes. */
if (to_be_read != 0) {
if (receivedlen - processed < (unsigned int)to_be_read) {
/* give up, not enough data in buffer */
SSH_LOG(SSH_LOG_PACKET,"packet: partial packet (read len) [len=%d]",len);
return processed;
}
if (padding > buffer_get_rest_len(session->in_buffer)) {
ssh_set_error(session, SSH_FATAL,
"Invalid padding: %d (%d left)",
padding,
buffer_get_rest_len(session->in_buffer));
goto error;
}
buffer_pass_bytes_end(session->in_buffer, padding);
compsize = buffer_get_rest_len(session->in_buffer);
packet = ((uint8_t*)data) + processed;
#if 0
ssh_socket_read(session->socket,
packet,
to_be_read - current_macsize);
#endif
rc = ssh_buffer_add_data(session->in_buffer,
packet,
to_be_read - current_macsize);
if (rc < 0) {
goto error;
}
processed += to_be_read - current_macsize;
}
if (session->current_crypto) {
/*
* Decrypt the rest of the packet (blocksize bytes already
* have been decrypted)
*/
uint32_t buffer_len = buffer_get_rest_len(session->in_buffer);
/* The following check avoids decrypting zero bytes */
if (buffer_len > blocksize) {
uint8_t *payload = ((uint8_t*)buffer_get_rest(session->in_buffer) + blocksize);
uint32_t plen = buffer_len - blocksize;
rc = packet_decrypt(session, payload, plen);
if (rc < 0) {
ssh_set_error(session, SSH_FATAL, "Decrypt error");
goto error;
}
}
/* copy the last part from the incoming buffer */
packet = ((uint8_t *)data) + processed;
memcpy(mac, packet, current_macsize);
rc = packet_hmac_verify(session, session->in_buffer, mac, session->current_crypto->in_hmac);
if (rc < 0) {
ssh_set_error(session, SSH_FATAL, "HMAC error");
goto error;
}
processed += current_macsize;
}
/* skip the size field which has been processed before */
buffer_pass_bytes(session->in_buffer, sizeof(uint32_t));
rc = buffer_get_u8(session->in_buffer, &padding);
if (rc == 0) {
ssh_set_error(session,
SSH_FATAL,
"Packet too short to read padding");
goto error;
}
if (padding > buffer_get_rest_len(session->in_buffer)) {
ssh_set_error(session,
SSH_FATAL,
"Invalid padding: %d (%d left)",
padding,
buffer_get_rest_len(session->in_buffer));
goto error;
}
buffer_pass_bytes_end(session->in_buffer, padding);
compsize = buffer_get_rest_len(session->in_buffer);
#ifdef WITH_ZLIB
if (session->current_crypto
&& session->current_crypto->do_compress_in
&& buffer_get_rest_len(session->in_buffer)) {
if (decompress_buffer(session, session->in_buffer,MAX_PACKET_LEN) < 0) {
goto error;
}
}
if (session->current_crypto
&& session->current_crypto->do_compress_in
&& buffer_get_rest_len(session->in_buffer) > 0) {
rc = decompress_buffer(session, session->in_buffer,MAX_PACKET_LEN);
if (rc < 0) {
goto error;
}
}
#endif /* WITH_ZLIB */
payloadsize=buffer_get_rest_len(session->in_buffer);
session->recv_seq++;
/* We don't want to rewrite a new packet while still executing the packet callbacks */
session->packet_state = PACKET_STATE_PROCESSING;
ssh_packet_parse_type(session);
SSH_LOG(SSH_LOG_PACKET,
"packet: read type %hhd [len=%d,padding=%hhd,comp=%d,payload=%d]",
session->in_packet.type, len, padding, compsize, payloadsize);
/* execute callbacks */
ssh_packet_process(session, session->in_packet.type);
session->packet_state = PACKET_STATE_INIT;
if(processed < receivedlen){
/* Handle a potential packet left in socket buffer */
SSH_LOG(SSH_LOG_PACKET,"Processing %" PRIdS " bytes left in socket buffer",
receivedlen-processed);
rc = ssh_packet_socket_callback(((unsigned char *)data) + processed,
receivedlen - processed,user);
processed += rc;
}
payloadsize = buffer_get_rest_len(session->in_buffer);
session->recv_seq++;
if (session->raw_counter != NULL) {
session->raw_counter->in_bytes += payloadsize;
session->raw_counter->in_packets++;
}
return processed;
case PACKET_STATE_PROCESSING:
SSH_LOG(SSH_LOG_RARE, "Nested packet processing. Delaying.");
return 0;
}
/*
* We don't want to rewrite a new packet while still executing the
* packet callbacks
*/
session->packet_state = PACKET_STATE_PROCESSING;
ssh_packet_parse_type(session);
SSH_LOG(SSH_LOG_PACKET,
"packet: read type %hhd [len=%d,padding=%hhd,comp=%d,payload=%d]",
session->in_packet.type, len, padding, compsize, payloadsize);
ssh_set_error(session, SSH_FATAL,
"Invalid state into packet_read2(): %d",
session->packet_state);
/* Execute callbacks */
ssh_packet_process(session, session->in_packet.type);
session->packet_state = PACKET_STATE_INIT;
if (processed < receivedlen) {
/* Handle a potential packet left in socket buffer */
SSH_LOG(SSH_LOG_PACKET,
"Processing %" PRIdS " bytes left in socket buffer",
receivedlen-processed);
packet = ((uint8_t*)data) + processed;
rc = ssh_packet_socket_callback(packet, receivedlen - processed,user);
processed += rc;
}
return processed;
case PACKET_STATE_PROCESSING:
SSH_LOG(SSH_LOG_PACKET, "Nested packet processing. Delaying.");
return 0;
}
ssh_set_error(session,
SSH_FATAL,
"Invalid state into packet_read2(): %d",
session->packet_state);
error:
session->session_state= SSH_SESSION_STATE_ERROR;
session->session_state= SSH_SESSION_STATE_ERROR;
return processed;
return processed;
}
void ssh_packet_register_socket_callback(ssh_session session, ssh_socket s){
@ -393,34 +442,42 @@ void ssh_packet_process(ssh_session session, uint8_t type){
* @return SSH_ERROR on error, else SSH_OK
*/
int ssh_packet_send_unimplemented(ssh_session session, uint32_t seqnum){
int r;
int rc;
r = buffer_add_u8(session->out_buffer, SSH2_MSG_UNIMPLEMENTED);
if (r < 0) {
return SSH_ERROR;
}
r = buffer_add_u32(session->out_buffer, htonl(seqnum));
if (r < 0) {
return SSH_ERROR;
}
r = packet_send(session);
rc = ssh_buffer_pack(session->out_buffer,
"bd",
SSH2_MSG_UNIMPLEMENTED,
seqnum);
if (rc != SSH_OK) {
ssh_set_error_oom(session);
return SSH_ERROR;
}
rc = packet_send(session);
return r;
return rc;
}
/** @internal
* @brief handles a SSH_MSG_UNIMPLEMENTED packet
*/
SSH_PACKET_CALLBACK(ssh_packet_unimplemented){
uint32_t seq;
uint32_t seq;
int rc;
(void)session; /* unused */
(void)type;
(void)user;
buffer_get_u32(packet,&seq);
seq=ntohl(seq);
SSH_LOG(SSH_LOG_RARE,
"Received SSH_MSG_UNIMPLEMENTED (sequence number %d)",seq);
return SSH_PACKET_USED;
(void)type;
(void)user;
rc = ssh_buffer_unpack(packet, "d", &seq);
if (rc != SSH_OK) {
SSH_LOG(SSH_LOG_WARNING,
"Could not unpack SSH_MSG_UNIMPLEMENTED packet");
}
SSH_LOG(SSH_LOG_RARE,
"Received SSH_MSG_UNIMPLEMENTED (sequence number %d)",seq);
return SSH_PACKET_USED;
}
/** @internal
@ -459,13 +516,17 @@ static int ssh_packet_write(ssh_session session) {
static int packet_send2(ssh_session session) {
unsigned int blocksize = (session->current_crypto ?
session->current_crypto->out_cipher->blocksize : 8);
enum ssh_hmac_e hmac_type = (session->current_crypto ?
session->current_crypto->out_hmac : session->next_crypto->out_hmac);
uint32_t currentlen = buffer_get_rest_len(session->out_buffer);
unsigned char *hmac = NULL;
char padstring[32] = {0};
char padstring[32] = { 0 };
int rc = SSH_ERROR;
uint32_t finallen,payloadsize,compsize;
uint8_t padding;
uint8_t header[sizeof(padding) + sizeof(finallen)] = { 0 };
payloadsize = currentlen;
#ifdef WITH_ZLIB
if (session->current_crypto
@ -485,19 +546,18 @@ static int packet_send2(ssh_session session) {
if (session->current_crypto) {
ssh_get_random(padstring, padding, 0);
} else {
memset(padstring,0,padding);
}
finallen = htonl(currentlen + padding + 1);
if (buffer_prepend_data(session->out_buffer, &padding, sizeof(uint8_t)) < 0) {
memcpy(&header[0], &finallen, sizeof(finallen));
header[sizeof(finallen)] = padding;
rc = buffer_prepend_data(session->out_buffer, &header, sizeof(header));
if (rc < 0) {
goto error;
}
if (buffer_prepend_data(session->out_buffer, &finallen, sizeof(uint32_t)) < 0) {
goto error;
}
if (buffer_add_data(session->out_buffer, padstring, padding) < 0) {
rc = ssh_buffer_add_data(session->out_buffer, padstring, padding);
if (rc < 0) {
goto error;
}
#ifdef WITH_PCAP
@ -510,18 +570,23 @@ static int packet_send2(ssh_session session) {
hmac = packet_encrypt(session, buffer_get_rest(session->out_buffer),
buffer_get_rest_len(session->out_buffer));
if (hmac) {
if (buffer_add_data(session->out_buffer, hmac, 20) < 0) {
rc = ssh_buffer_add_data(session->out_buffer, hmac, hmac_digest_len(hmac_type));
if (rc < 0) {
goto error;
}
}
rc = ssh_packet_write(session);
session->send_seq++;
if (session->raw_counter != NULL) {
session->raw_counter->out_bytes += payloadsize;
session->raw_counter->out_packets++;
}
SSH_LOG(SSH_LOG_PACKET,
"packet: wrote [len=%d,padding=%hhd,comp=%d,payload=%d]",
ntohl(finallen), padding, compsize, payloadsize);
if (buffer_reinit(session->out_buffer) < 0) {
if (ssh_buffer_reinit(session->out_buffer) < 0) {
rc = SSH_ERROR;
}
error:

27
libssh/src/packet1.c
View File

@ -106,7 +106,7 @@ int ssh_packet_socket_callback1(const void *data, size_t receivedlen, void *user
size_t processed=0;
uint32_t padding;
uint32_t crc;
uint32_t len;
uint32_t len, buffer_len;
ssh_session session=(ssh_session)user;
switch (session->packet_state){
@ -114,7 +114,7 @@ int ssh_packet_socket_callback1(const void *data, size_t receivedlen, void *user
memset(&session->in_packet, 0, sizeof(PACKET));
if (session->in_buffer) {
if (buffer_reinit(session->in_buffer) < 0) {
if (ssh_buffer_reinit(session->in_buffer) < 0) {
goto error;
}
} else {
@ -155,7 +155,7 @@ int ssh_packet_socket_callback1(const void *data, size_t receivedlen, void *user
/* it is _not_ possible that to_be_read be < 8. */
packet = (char *)data + processed;
if (buffer_add_data(session->in_buffer,packet,to_be_read) < 0) {
if (ssh_buffer_add_data(session->in_buffer,packet,to_be_read) < 0) {
goto error;
}
processed += to_be_read;
@ -168,11 +168,16 @@ int ssh_packet_socket_callback1(const void *data, size_t receivedlen, void *user
* We decrypt everything, missing the lenght part (which was
* previously read, unencrypted, and is not part of the buffer
*/
if (packet_decrypt(session,
ssh_buffer_get_begin(session->in_buffer),
ssh_buffer_get_len(session->in_buffer)) < 0) {
ssh_set_error(session, SSH_FATAL, "Packet decrypt error");
goto error;
buffer_len = ssh_buffer_get_len(session->in_buffer);
if (buffer_len > 0) {
int rc;
rc = packet_decrypt(session,
ssh_buffer_get_begin(session->in_buffer),
buffer_len);
if (rc < 0) {
ssh_set_error(session, SSH_FATAL, "Packet decrypt error");
goto error;
}
}
}
#ifdef DEBUG_CRYPTO
@ -236,7 +241,7 @@ int ssh_packet_socket_callback1(const void *data, size_t receivedlen, void *user
return processed;
case PACKET_STATE_PROCESSING:
SSH_LOG(SSH_LOG_RARE, "Nested packet processing. Delaying.");
SSH_LOG(SSH_LOG_PACKET, "Nested packet processing. Delaying.");
return 0;
}
@ -300,6 +305,8 @@ int packet_send1(ssh_session session) {
ssh_buffer_get_len(session->out_buffer));
#endif
/* session->out_buffer should have more than sizeof(uint32_t) bytes
in it as required for packet_encrypt */
packet_encrypt(session, (unsigned char *)ssh_buffer_get_begin(session->out_buffer) + sizeof(uint32_t),
ssh_buffer_get_len(session->out_buffer) - sizeof(uint32_t));
@ -315,7 +322,7 @@ int packet_send1(ssh_session session) {
session->send_seq++;
if (buffer_reinit(session->out_buffer) < 0) {
if (ssh_buffer_reinit(session->out_buffer) < 0) {
rc = SSH_ERROR;
}
error:

32
libssh/src/packet_cb.c
View File

@ -43,29 +43,35 @@
* @brief Handle a SSH_DISCONNECT packet.
*/
SSH_PACKET_CALLBACK(ssh_packet_disconnect_callback){
uint32_t code;
char *error=NULL;
ssh_string error_s;
(void)user;
(void)type;
buffer_get_u32(packet, &code);
int rc;
uint32_t code = 0;
char *error = NULL;
ssh_string error_s;
(void)user;
(void)type;
rc = buffer_get_u32(packet, &code);
if (rc != 0) {
code = ntohl(code);
}
error_s = buffer_get_ssh_string(packet);
if (error_s != NULL) {
error = ssh_string_to_char(error_s);
ssh_string_free(error_s);
}
SSH_LOG(SSH_LOG_PACKET, "Received SSH_MSG_DISCONNECT %d:%s",code,
error != NULL ? error : "no error");
SSH_LOG(SSH_LOG_PACKET, "Received SSH_MSG_DISCONNECT %d:%s",
code, error != NULL ? error : "no error");
ssh_set_error(session, SSH_FATAL,
"Received SSH_MSG_DISCONNECT: %d:%s",code,
error != NULL ? error : "no error");
"Received SSH_MSG_DISCONNECT: %d:%s",
code, error != NULL ? error : "no error");
SAFE_FREE(error);
ssh_socket_close(session->socket);
session->alive = 0;
session->session_state= SSH_SESSION_STATE_ERROR;
/* TODO: handle a graceful disconnect */
return SSH_PACKET_USED;
session->session_state = SSH_SESSION_STATE_ERROR;
/* TODO: handle a graceful disconnect */
return SSH_PACKET_USED;
}
/**

31
libssh/src/packet_crypt.c
View File

@ -22,6 +22,7 @@
*/
#include "config.h"
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
@ -59,6 +60,9 @@ uint32_t packet_decrypt_len(ssh_session session, char *crypted){
int packet_decrypt(ssh_session session, void *data,uint32_t len) {
struct ssh_cipher_struct *crypto = session->current_crypto->in_cipher;
char *out = NULL;
assert(len);
if(len % session->current_crypto->in_cipher->blocksize != 0){
ssh_set_error(session, SSH_FATAL, "Cryptographic functions must be set on at least one blocksize (received %d)",len);
return SSH_ERROR;
@ -73,11 +77,10 @@ int packet_decrypt(ssh_session session, void *data,uint32_t len) {
SAFE_FREE(out);
return -1;
}
crypto->cbc_decrypt(crypto,data,out,len);
crypto->decrypt(crypto,data,out,len);
memcpy(data,out,len);
memset(out,0,len);
BURN_BUFFER(out, len);
SAFE_FREE(out);
return 0;
}
@ -88,6 +91,9 @@ unsigned char *packet_encrypt(ssh_session session, void *data, uint32_t len) {
char *out = NULL;
unsigned int finallen;
uint32_t seq;
enum ssh_hmac_e type;
assert(len);
if (!session->current_crypto) {
return NULL; /* nothing to do here */
@ -101,6 +107,7 @@ unsigned char *packet_encrypt(ssh_session session, void *data, uint32_t len) {
return NULL;
}
type = session->current_crypto->out_hmac;
seq = ntohl(session->send_seq);
crypto = session->current_crypto->out_cipher;
@ -111,7 +118,7 @@ unsigned char *packet_encrypt(ssh_session session, void *data, uint32_t len) {
}
if (session->version == 2) {
ctx = hmac_init(session->current_crypto->encryptMAC,20,SSH_HMAC_SHA1);
ctx = hmac_init(session->current_crypto->encryptMAC, hmac_digest_len(type), type);
if (ctx == NULL) {
SAFE_FREE(out);
return NULL;
@ -120,18 +127,18 @@ unsigned char *packet_encrypt(ssh_session session, void *data, uint32_t len) {
hmac_update(ctx,data,len);
hmac_final(ctx,session->current_crypto->hmacbuf,&finallen);
#ifdef DEBUG_CRYPTO
ssh_print_hexa("mac: ",data,len);
if (finallen != 20) {
ssh_print_hexa("mac: ",data,hmac_digest_len(type));
if (finallen != hmac_digest_len(type)) {
printf("Final len is %d\n",finallen);
}
ssh_print_hexa("Packet hmac", session->current_crypto->hmacbuf, 20);
ssh_print_hexa("Packet hmac", session->current_crypto->hmacbuf, hmac_digest_len(type));
#endif
}
crypto->cbc_encrypt(crypto, data, out, len);
crypto->encrypt(crypto, data, out, len);
memcpy(data, out, len);
memset(out, 0, len);
BURN_BUFFER(out, len);
SAFE_FREE(out);
if (session->version == 2) {
@ -154,13 +161,13 @@ unsigned char *packet_encrypt(ssh_session session, void *data, uint32_t len) {
* occurred.
*/
int packet_hmac_verify(ssh_session session, ssh_buffer buffer,
unsigned char *mac) {
unsigned char hmacbuf[EVP_MAX_MD_SIZE] = {0};
unsigned char *mac, enum ssh_hmac_e type) {
unsigned char hmacbuf[DIGEST_MAX_LEN] = {0};
HMACCTX ctx;
unsigned int len;
uint32_t seq;
ctx = hmac_init(session->current_crypto->decryptMAC, 20, SSH_HMAC_SHA1);
ctx = hmac_init(session->current_crypto->decryptMAC, hmac_digest_len(type), type);
if (ctx == NULL) {
return -1;
}

149
libssh/src/pcap.c
View File

@ -342,7 +342,7 @@ static int ssh_pcap_context_connect(ssh_pcap_context ctx){
int ssh_pcap_context_write(ssh_pcap_context ctx,enum ssh_pcap_direction direction
, void *data, uint32_t len, uint32_t origlen){
ssh_buffer ip;
int err;
int rc;
if(ctx==NULL || ctx->file ==NULL)
return SSH_ERROR;
if(ctx->connected==0)
@ -353,147 +353,104 @@ int ssh_pcap_context_write(ssh_pcap_context ctx,enum ssh_pcap_direction directio
ssh_set_error_oom(ctx->session);
return SSH_ERROR;
}
/* build an IP packet */
/* V4, 20 bytes */
err = buffer_add_u8(ip,4 << 4 | 5);
if (err < 0) {
goto error;
}
/* tos */
err = buffer_add_u8(ip,0);
if (err < 0) {
goto error;
}
/* total len */
err = buffer_add_u16(ip,htons(origlen + TCPIPHDR_LEN));
if (err < 0) {
goto error;
}
/* IP id number */
err = buffer_add_u16(ip,htons(ctx->file->ipsequence));
if (err < 0) {
goto error;
}
/* build an IP packet */
rc = ssh_buffer_pack(ip,
"bbwwwbbw",
4 << 4 | 5, /* V4, 20 bytes */
0, /* tos */
origlen + TCPIPHDR_LEN, /* total len */
ctx->file->ipsequence, /* IP id number */
0, /* fragment offset */
64, /* TTL */
6, /* protocol TCP=6 */
0); /* checksum */
ctx->file->ipsequence++;
/* fragment offset */
err = buffer_add_u16(ip,htons(0));
if (err < 0) {
goto error;
}
/* TTL */
err = buffer_add_u8(ip,64);
if (err < 0) {
goto error;
}
/* protocol TCP=6 */
err = buffer_add_u8(ip,6);
if (err < 0) {
goto error;
}
/* checksum */
err = buffer_add_u16(ip,0);
if (err < 0) {
goto error;
}
if (rc != SSH_OK){
goto error;
}
if(direction==SSH_PCAP_DIR_OUT){
err = buffer_add_u32(ip,ctx->ipsource);
if (err < 0) {
rc = buffer_add_u32(ip,ctx->ipsource);
if (rc < 0) {
goto error;
}
err = buffer_add_u32(ip,ctx->ipdest);
if (err < 0) {
rc = buffer_add_u32(ip,ctx->ipdest);
if (rc < 0) {
goto error;
}
} else {
err = buffer_add_u32(ip,ctx->ipdest);
if (err < 0) {
rc = buffer_add_u32(ip,ctx->ipdest);
if (rc < 0) {
goto error;
}
err = buffer_add_u32(ip,ctx->ipsource);
if (err < 0) {
rc = buffer_add_u32(ip,ctx->ipsource);
if (rc < 0) {
goto error;
}
}
/* TCP */
if(direction==SSH_PCAP_DIR_OUT){
err = buffer_add_u16(ip,ctx->portsource);
if (err < 0) {
rc = buffer_add_u16(ip,ctx->portsource);
if (rc < 0) {
goto error;
}
err = buffer_add_u16(ip,ctx->portdest);
if (err < 0) {
rc = buffer_add_u16(ip,ctx->portdest);
if (rc < 0) {
goto error;
}
} else {
err = buffer_add_u16(ip,ctx->portdest);
if (err < 0) {
rc = buffer_add_u16(ip,ctx->portdest);
if (rc < 0) {
goto error;
}
err = buffer_add_u16(ip,ctx->portsource);
if (err < 0) {
rc = buffer_add_u16(ip,ctx->portsource);
if (rc < 0) {
goto error;
}
}
/* sequence number */
if(direction==SSH_PCAP_DIR_OUT){
err = buffer_add_u32(ip,ntohl(ctx->outsequence));
if (err < 0) {
rc = ssh_buffer_pack(ip, "d", ctx->outsequence);
if (rc != SSH_OK) {
goto error;
}
ctx->outsequence+=origlen;
} else {
err = buffer_add_u32(ip,ntohl(ctx->insequence));
if (err < 0) {
rc = ssh_buffer_pack(ip, "d", ctx->insequence);
if (rc != SSH_OK) {
goto error;
}
ctx->insequence+=origlen;
}
/* ack number */
if(direction==SSH_PCAP_DIR_OUT){
err = buffer_add_u32(ip,ntohl(ctx->insequence));
if (err < 0) {
rc = ssh_buffer_pack(ip, "d", ctx->insequence);
if (rc != SSH_OK) {
goto error;
}
} else {
err = buffer_add_u32(ip,ntohl(ctx->outsequence));
if (err < 0) {
rc = ssh_buffer_pack(ip, "d", ctx->outsequence);
if (rc != SSH_OK) {
goto error;
}
}
/* header len = 20 = 5 * 32 bits, at offset 4*/
err = buffer_add_u8(ip,5 << 4);
if (err < 0) {
rc = ssh_buffer_pack(ip,
"bbwwwP",
5 << 4, /* header len = 20 = 5 * 32 bits, at offset 4*/
TH_PUSH | TH_ACK, /* flags */
65535, /* window */
0, /* checksum */
0, /* urgent data ptr */
(size_t)len, data); /* actual data */
if (rc != SSH_OK) {
goto error;
}
/* flags */
err = buffer_add_u8(ip,TH_PUSH | TH_ACK);
if (err < 0) {
goto error;
}
/* window */
err = buffer_add_u16(ip,htons(65535));
if (err < 0) {
goto error;
}
/* checksum */
err = buffer_add_u16(ip,htons(0));
if (err < 0) {
goto error;
}
/* urgent data ptr */
err = buffer_add_u16(ip,0);
if (err < 0) {
goto error;
}
/* actual data */
err = buffer_add_data(ip,data,len);
if (err < 0) {
goto error;
}
err=ssh_pcap_file_write_packet(ctx->file,ip,origlen + TCPIPHDR_LEN);
rc=ssh_pcap_file_write_packet(ctx->file,ip,origlen + TCPIPHDR_LEN);
error:
ssh_buffer_free(ip);
return err;
return rc;
}
/** @brief sets the pcap file used to trace the session

249
libssh/src/pki.c
View File

@ -3,7 +3,7 @@
* This file is part of the SSH Library
*
* Copyright (c) 2010 by Aris Adamantiadis
* Copyright (c) 2011-2012 Andreas Schneider <asn@cryptomilk.org>
* Copyright (c) 2011-2013 Andreas Schneider <asn@cryptomilk.org>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -98,6 +98,25 @@ enum ssh_keytypes_e pki_privatekey_type_from_string(const char *privkey) {
return SSH_KEYTYPE_UNKNOWN;
}
/**
* @brief returns the ECDSA key name ("ecdsa-sha2-nistp256" for example)
*
* @param[in] key the ssh_key whose ECDSA name to get
*
* @returns the ECDSA key name ("ecdsa-sha2-nistp256" for example)
*
* @returns "unknown" if the ECDSA key name is not known
*/
const char *ssh_pki_key_ecdsa_name(const ssh_key key)
{
#ifdef HAVE_OPENSSL_ECC /* FIXME Better ECC check needed */
return pki_key_ecdsa_nid_to_name(key->ecdsa_nid);
#else
(void) key; /* unused */
return NULL;
#endif
}
/**
* @brief creates a new empty SSH key
* @returns an empty ssh_key handle, or NULL on error.
@ -138,6 +157,11 @@ void ssh_key_clean (ssh_key key){
if(key->ecdsa) EC_KEY_free(key->ecdsa);
#endif /* HAVE_OPENSSL_ECC */
#endif
if (key->ed25519_privkey != NULL){
BURN_BUFFER(key->ed25519_privkey, sizeof(ed25519_privkey));
SAFE_FREE(key->ed25519_privkey);
}
SAFE_FREE(key->ed25519_pubkey);
key->flags=SSH_KEY_FLAG_EMPTY;
key->type=SSH_KEYTYPE_UNKNOWN;
key->ecdsa_nid = 0;
@ -188,6 +212,8 @@ const char *ssh_key_type_to_char(enum ssh_keytypes_e type) {
return "ssh-rsa1";
case SSH_KEYTYPE_ECDSA:
return "ssh-ecdsa";
case SSH_KEYTYPE_ED25519:
return "ssh-ed25519";
case SSH_KEYTYPE_UNKNOWN:
return NULL;
}
@ -226,6 +252,8 @@ enum ssh_keytypes_e ssh_key_type_from_name(const char *name) {
|| strcmp(name, "ecdsa-sha2-nistp384") == 0
|| strcmp(name, "ecdsa-sha2-nistp521") == 0) {
return SSH_KEYTYPE_ECDSA;
} else if (strcmp(name, "ssh-ed25519") == 0){
return SSH_KEYTYPE_ED25519;
}
return SSH_KEYTYPE_UNKNOWN;
@ -281,7 +309,7 @@ int ssh_key_cmp(const ssh_key k1,
}
if (k1->type != k2->type) {
ssh_pki_log("key types don't macth!");
ssh_pki_log("key types don't match!");
return 1;
}
@ -292,6 +320,10 @@ int ssh_key_cmp(const ssh_key k1,
}
}
if (k1->type == SSH_KEYTYPE_ED25519) {
return pki_ed25519_key_cmp(k1, k2, what);
}
return pki_key_compare(k1, k2, what);
}
@ -331,6 +363,13 @@ void ssh_signature_free(ssh_signature sig)
#endif
break;
case SSH_KEYTYPE_ECDSA:
#if defined(HAVE_LIBCRYPTO) && defined(HAVE_OPENSSL_ECC)
ECDSA_SIG_free(sig->ecdsa_sig);
#endif
break;
case SSH_KEYTYPE_ED25519:
SAFE_FREE(sig->ed25519_sig);
break;
case SSH_KEYTYPE_UNKNOWN:
break;
}
@ -476,6 +515,65 @@ int ssh_pki_import_privkey_file(const char *filename,
return SSH_OK;
}
/**
* @brief Export a private key to a pam file on disk.
*
* @param[in] privkey The private key to export.
*
* @param[in] passphrase The passphrase to use to encrypt the key with or
* NULL. An empty string means no passphrase.
*
* @param[in] auth_fn An auth function you may want to use or NULL.
*
* @param[in] auth_data Private data passed to the auth function.
*
* @param[in] filename The path where to store the pem file.
*
* @return SSH_OK on success, SSH_ERROR on error.
*/
int ssh_pki_export_privkey_file(const ssh_key privkey,
const char *passphrase,
ssh_auth_callback auth_fn,
void *auth_data,
const char *filename)
{
ssh_string blob;
FILE *fp;
int rc;
if (privkey == NULL || !ssh_key_is_private(privkey)) {
return SSH_ERROR;
}
fp = fopen(filename, "wb");
if (fp == NULL) {
SSH_LOG(SSH_LOG_FUNCTIONS, "Error opening %s: %s",
filename, strerror(errno));
return SSH_EOF;
}
blob = pki_private_key_to_pem(privkey,
passphrase,
auth_fn,
auth_data);
if (blob == NULL) {
fclose(fp);
return -1;
}
rc = fwrite(ssh_string_data(blob), ssh_string_len(blob), 1, fp);
ssh_string_free(blob);
if (rc != 1 || ferror(fp)) {
fclose(fp);
unlink(filename);
return SSH_ERROR;
}
fclose(fp);
return SSH_OK;
}
/* temporary function to migrate seemlessly to ssh_key */
ssh_public_key ssh_pki_convert_key_to_publickey(const ssh_key key) {
ssh_public_key pub;
@ -661,10 +759,36 @@ static int pki_import_pubkey_buffer(ssh_buffer buffer,
if (rc < 0) {
goto fail;
}
/* Update key type */
key->type_c = ssh_pki_key_ecdsa_name(key);
}
break;
#endif
case SSH_KEYTYPE_ED25519:
{
ssh_string pubkey = buffer_get_ssh_string(buffer);
if (ssh_string_len(pubkey) != ED25519_PK_LEN) {
ssh_pki_log("Invalid public key length");
ssh_string_burn(pubkey);
ssh_string_free(pubkey);
goto fail;
}
key->ed25519_pubkey = malloc(ED25519_PK_LEN);
if (key->ed25519_pubkey == NULL) {
ssh_string_burn(pubkey);
ssh_string_free(pubkey);
goto fail;
}
memcpy(key->ed25519_pubkey, ssh_string_data(pubkey), ED25519_PK_LEN);
ssh_string_burn(pubkey);
ssh_string_free(pubkey);
}
break;
case SSH_KEYTYPE_UNKNOWN:
default:
ssh_pki_log("Unknown public key protocol %d", type);
goto fail;
}
@ -752,7 +876,7 @@ int ssh_pki_import_pubkey_blob(const ssh_string key_blob,
return SSH_ERROR;
}
rc = buffer_add_data(buffer, ssh_string_data(key_blob),
rc = ssh_buffer_add_data(buffer, ssh_string_data(key_blob),
ssh_string_len(key_blob));
if (rc < 0) {
ssh_pki_log("Out of memory!");
@ -917,10 +1041,20 @@ int ssh_pki_generate(enum ssh_keytypes_e type, int parameter,
case SSH_KEYTYPE_ECDSA:
#ifdef HAVE_ECC
rc = pki_key_generate_ecdsa(key, parameter);
if(rc == SSH_ERROR)
if (rc == SSH_ERROR) {
goto error;
}
/* Update key type */
key->type_c = ssh_pki_key_ecdsa_name(key);
break;
#endif
case SSH_KEYTYPE_ED25519:
rc = pki_key_generate_ed25519(key);
if (rc == SSH_ERROR) {
goto error;
}
break;
case SSH_KEYTYPE_UNKNOWN:
goto error;
}
@ -999,11 +1133,11 @@ int ssh_pki_export_pubkey_blob(const ssh_key key,
}
/**
* @brief Convert a public key to a base64 hased key.
* @brief Convert a public key to a base64 encoded key.
*
* @param[in] key The key to hash
*
* @param[out] b64_key A pointer to store the allocated base64 hashed key. You
* @param[out] b64_key A pointer to store the allocated base64 encoded key. You
* need to free the buffer.
*
* @return SSH_OK on success, SSH_ERROR on error.
@ -1177,9 +1311,9 @@ int ssh_pki_import_signature_blob(const ssh_string sig_blob,
return SSH_ERROR;
}
rc = buffer_add_data(buf,
ssh_string_data(sig_blob),
ssh_string_len(sig_blob));
rc = ssh_buffer_add_data(buf,
ssh_string_data(sig_blob),
ssh_string_len(sig_blob));
if (rc < 0) {
ssh_buffer_free(buf);
return SSH_ERROR;
@ -1236,12 +1370,19 @@ int ssh_pki_signature_verify_blob(ssh_session session,
evp(key->ecdsa_nid, digest, dlen, ehash, &elen);
#ifdef DEBUG_CRYPTO
ssh_print_hexa("Hash to be verified with ecdsa",
ehash, elen);
#endif
rc = pki_signature_verify(session,
sig,
key,
ehash,
elen);
#endif
} else if (key->type == SSH_KEYTYPE_ED25519) {
rc = pki_signature_verify(session, sig, key, digest, dlen);
} else {
unsigned char hash[SHA_DIGEST_LEN] = {0};
@ -1302,8 +1443,36 @@ ssh_string ssh_pki_do_sign(ssh_session session,
evp_update(ctx, buffer_get_rest(sigbuf), buffer_get_rest_len(sigbuf));
evp_final(ctx, ehash, &elen);
#ifdef DEBUG_CRYPTO
ssh_print_hexa("Hash being signed", ehash, elen);
#endif
sig = pki_do_sign(privkey, ehash, elen);
#endif
} else if (privkey->type == SSH_KEYTYPE_ED25519){
ssh_buffer buf;
buf = ssh_buffer_new();
if (buf == NULL) {
ssh_string_free(session_id);
return NULL;
}
ssh_buffer_set_secure(buf);
rc = ssh_buffer_pack(buf,
"SP",
session_id,
buffer_get_rest_len(sigbuf), buffer_get_rest(sigbuf));
if (rc != SSH_OK) {
ssh_string_free(session_id);
ssh_buffer_free(buf);
return NULL;
}
sig = pki_do_sign(privkey,
ssh_buffer_get_begin(buf),
ssh_buffer_get_len(buf));
ssh_buffer_free(buf);
} else {
unsigned char hash[SHA_DIGEST_LEN] = {0};
SHACTX ctx;
@ -1395,10 +1564,8 @@ ssh_string ssh_srv_pki_do_sign_sessionid(ssh_session session,
const ssh_key privkey)
{
struct ssh_crypto_struct *crypto;
unsigned char hash[SHA_DIGEST_LEN] = {0};
ssh_signature sig;
ssh_string sig_blob;
SHACTX ctx;
int rc;
if (session == NULL || privkey == NULL || !ssh_key_is_private(privkey)) {
@ -1407,24 +1574,64 @@ ssh_string ssh_srv_pki_do_sign_sessionid(ssh_session session,
crypto = session->next_crypto ? session->next_crypto :
session->current_crypto;
ctx = sha1_init();
if (ctx == NULL) {
return NULL;
}
if (crypto->secret_hash == NULL){
ssh_set_error(session,SSH_FATAL,"Missing secret_hash");
return NULL;
}
sha1_update(ctx, crypto->secret_hash, crypto->digest_len);
sha1_final(hash, ctx);
if (privkey->type == SSH_KEYTYPE_ECDSA) {
#ifdef HAVE_ECC
unsigned char ehash[EVP_DIGEST_LEN] = {0};
uint32_t elen;
evp(privkey->ecdsa_nid, crypto->secret_hash, crypto->digest_len,
ehash, &elen);
#ifdef DEBUG_CRYPTO
ssh_print_hexa("Hash being signed", hash, SHA_DIGEST_LEN);
ssh_print_hexa("Hash being signed", ehash, elen);
#endif
sig = pki_do_sign_sessionid(privkey, hash, SHA_DIGEST_LEN);
if (sig == NULL) {
return NULL;
sig = pki_do_sign_sessionid(privkey, ehash, elen);
if (sig == NULL) {
return NULL;
}
#endif
} else if (privkey->type == SSH_KEYTYPE_ED25519) {
sig = ssh_signature_new();
if (sig == NULL){
return NULL;
}
sig->type = privkey->type;
sig->type_c = privkey->type_c;
rc = pki_ed25519_sign(privkey,
sig,
crypto->secret_hash,
crypto->digest_len);
if (rc != SSH_OK){
ssh_signature_free(sig);
sig = NULL;
}
} else {
unsigned char hash[SHA_DIGEST_LEN] = {0};
SHACTX ctx;
ctx = sha1_init();
if (ctx == NULL) {
return NULL;
}
sha1_update(ctx, crypto->secret_hash, crypto->digest_len);
sha1_final(hash, ctx);
#ifdef DEBUG_CRYPTO
ssh_print_hexa("Hash being signed", hash, SHA_DIGEST_LEN);
#endif
sig = pki_do_sign_sessionid(privkey, hash, SHA_DIGEST_LEN);
if (sig == NULL) {
return NULL;
}
}
rc = ssh_pki_export_signature_blob(sig, &sig_blob);

382
libssh/src/pki_crypto.c
View File

@ -4,7 +4,7 @@
* This file is part of the SSH Library
*
* Copyright (c) 2003-2009 by Aris Adamantiadis
* Copyright (c) 2009-2012 by Andreas Schneider <asn@cryptomilk.org>
* Copyright (c) 2009-2013 by Andreas Schneider <asn@cryptomilk.org>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -44,7 +44,7 @@
#include "libssh/session.h"
#include "libssh/pki.h"
#include "libssh/pki_priv.h"
#include "libssh/dh.h"
#include "libssh/bignum.h"
struct pem_get_password_struct {
ssh_auth_callback fn;
@ -89,7 +89,7 @@ static int pki_key_ecdsa_to_nid(EC_KEY *k)
return -1;
}
static const char *pki_key_ecdsa_nid_to_name(int nid)
const char *pki_key_ecdsa_nid_to_name(int nid)
{
switch (nid) {
case NID_X9_62_prime256v1:
@ -200,9 +200,11 @@ int pki_pubkey_build_ecdsa(ssh_key key, int nid, ssh_string e)
return -1;
}
/* EC_KEY_set_public_key duplicates p */
ok = EC_KEY_set_public_key(key->ecdsa, p);
EC_POINT_free(p);
if (!ok) {
EC_POINT_free(p);
return -1;
}
return 0;
@ -212,6 +214,7 @@ int pki_pubkey_build_ecdsa(ssh_key key, int nid, ssh_string e)
ssh_key pki_key_dup(const ssh_key key, int demote)
{
ssh_key new;
int rc;
new = ssh_key_new();
if (new == NULL) {
@ -343,13 +346,13 @@ ssh_key pki_key_dup(const ssh_key key, int demote)
break;
case SSH_KEYTYPE_ECDSA:
#ifdef HAVE_OPENSSL_ECC
new->ecdsa_nid = key->ecdsa_nid;
/* privkey -> pubkey */
if (demote && ssh_key_is_private(key)) {
const EC_POINT *p;
int ok;
new->ecdsa_nid = key->ecdsa_nid;
new->ecdsa = EC_KEY_new_by_curve_name(key->ecdsa_nid);
if (new->ecdsa == NULL) {
goto fail;
@ -369,7 +372,14 @@ ssh_key pki_key_dup(const ssh_key key, int demote)
}
break;
#endif
case SSH_KEYTYPE_ED25519:
rc = pki_ed25519_key_dup(new, key);
if (rc != SSH_OK) {
goto fail;
}
break;
case SSH_KEYTYPE_UNKNOWN:
default:
ssh_key_free(new);
return NULL;
}
@ -381,10 +391,20 @@ fail:
}
int pki_key_generate_rsa(ssh_key key, int parameter){
key->rsa = RSA_generate_key(parameter, 65537, NULL, NULL);
if(key->rsa == NULL)
return SSH_ERROR;
return SSH_OK;
BIGNUM *e;
int rc;
e = BN_new();
key->rsa = RSA_new();
BN_set_word(e, 65537);
rc = RSA_generate_key_ex(key->rsa, parameter, e, NULL);
BN_free(e);
if (rc == -1 || key->rsa == NULL)
return SSH_ERROR;
return SSH_OK;
}
int pki_key_generate_dss(ssh_key key, int parameter){
@ -521,13 +541,135 @@ int pki_key_compare(const ssh_key k1,
break;
}
#endif
case SSH_KEYTYPE_ED25519:
/* ed25519 keys handled globaly */
case SSH_KEYTYPE_UNKNOWN:
default:
return 1;
}
return 0;
}
ssh_string pki_private_key_to_pem(const ssh_key key,
const char *passphrase,
ssh_auth_callback auth_fn,
void *auth_data)
{
ssh_string blob;
BUF_MEM *buf;
BIO *mem;
int rc;
/* needed for openssl initialization */
if (ssh_init() < 0) {
return NULL;
}
mem = BIO_new(BIO_s_mem());
if (mem == NULL) {
return NULL;
}
switch (key->type) {
case SSH_KEYTYPE_DSS:
if (passphrase == NULL) {
struct pem_get_password_struct pgp = { auth_fn, auth_data };
rc = PEM_write_bio_DSAPrivateKey(mem,
key->dsa,
NULL, /* cipher */
NULL, /* kstr */
0, /* klen */
pem_get_password,
&pgp);
} else {
rc = PEM_write_bio_DSAPrivateKey(mem,
key->dsa,
NULL, /* cipher */
NULL, /* kstr */
0, /* klen */
NULL, /* auth_fn */
(void*) passphrase);
}
if (rc != 1) {
goto err;
}
break;
case SSH_KEYTYPE_RSA:
case SSH_KEYTYPE_RSA1:
if (passphrase == NULL) {
struct pem_get_password_struct pgp = { auth_fn, auth_data };
rc = PEM_write_bio_RSAPrivateKey(mem,
key->rsa,
NULL, /* cipher */
NULL, /* kstr */
0, /* klen */
pem_get_password,
&pgp);
} else {
rc = PEM_write_bio_RSAPrivateKey(mem,
key->rsa,
NULL, /* cipher */
NULL, /* kstr */
0, /* klen */
NULL, /* auth_fn */
(void*) passphrase);
}
if (rc != 1) {
goto err;
}
break;
case SSH_KEYTYPE_ECDSA:
#ifdef HAVE_ECC
if (passphrase == NULL) {
struct pem_get_password_struct pgp = { auth_fn, auth_data };
rc = PEM_write_bio_ECPrivateKey(mem,
key->ecdsa,
NULL, /* cipher */
NULL, /* kstr */
0, /* klen */
pem_get_password,
&pgp);
} else {
rc = PEM_write_bio_ECPrivateKey(mem,
key->ecdsa,
NULL, /* cipher */
NULL, /* kstr */
0, /* klen */
NULL, /* auth_fn */
(void*) passphrase);
}
if (rc != 1) {
goto err;
}
break;
#endif
case SSH_KEYTYPE_ED25519:
case SSH_KEYTYPE_UNKNOWN:
BIO_free(mem);
ssh_pki_log("Unkown or invalid private key type %d", key->type);
return NULL;
}
BIO_get_mem_ptr(mem, &buf);
blob = ssh_string_new(buf->length);
if (blob == NULL) {
goto err;
}
ssh_string_fill(blob, buf->data, buf->length);
BIO_free(mem);
return blob;
err:
BIO_free(mem);
return NULL;
}
ssh_key pki_private_key_from_base64(const char *b64_key,
const char *passphrase,
ssh_auth_callback auth_fn,
@ -629,6 +771,7 @@ ssh_key pki_private_key_from_base64(const char *b64_key,
break;
#endif
case SSH_KEYTYPE_ED25519:
case SSH_KEYTYPE_UNKNOWN:
BIO_free(mem);
ssh_pki_log("Unkown or invalid private key type %d", type);
@ -817,7 +960,7 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
break;
case SSH_KEYTYPE_ECDSA:
#ifdef HAVE_OPENSSL_ECC
rc = buffer_reinit(buffer);
rc = ssh_buffer_reinit(buffer);
if (rc < 0) {
ssh_buffer_free(buffer);
return NULL;
@ -867,7 +1010,14 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
break;
#endif
case SSH_KEYTYPE_ED25519:
rc = pki_ed25519_public_key_to_blob(buffer, key);
if (rc == SSH_ERROR){
goto fail;
}
break;
case SSH_KEYTYPE_UNKNOWN:
default:
goto fail;
}
@ -976,41 +1126,63 @@ static ssh_string _RSA_do_sign(const unsigned char *digest,
return sig_blob;
}
static ssh_string pki_dsa_signature_to_blob(const ssh_signature sig)
{
char buffer[40] = { 0 };
ssh_string sig_blob = NULL;
ssh_string r;
int r_len, r_offset_in, r_offset_out;
ssh_string s;
int s_len, s_offset_in, s_offset_out;
r = make_bignum_string(sig->dsa_sig->r);
if (r == NULL) {
return NULL;
}
s = make_bignum_string(sig->dsa_sig->s);
if (s == NULL) {
ssh_string_free(r);
return NULL;
}
r_len = ssh_string_len(r);
r_offset_in = (r_len > 20) ? (r_len - 20) : 0;
r_offset_out = (r_len < 20) ? (20 - r_len) : 0;
s_len = ssh_string_len(s);
s_offset_in = (s_len > 20) ? (s_len - 20) : 0;
s_offset_out = (s_len < 20) ? (20 - s_len) : 0;
memcpy(buffer + r_offset_out,
((char *)ssh_string_data(r)) + r_offset_in,
r_len - r_offset_in);
memcpy(buffer + 20 + s_offset_out,
((char *)ssh_string_data(s)) + s_offset_in,
s_len - s_offset_in);
ssh_string_free(r);
ssh_string_free(s);
sig_blob = ssh_string_new(40);
if (sig_blob == NULL) {
return NULL;
}
ssh_string_fill(sig_blob, buffer, 40);
return sig_blob;
}
ssh_string pki_signature_to_blob(const ssh_signature sig)
{
char buffer[40] = {0};
ssh_string sig_blob = NULL;
ssh_string r;
ssh_string s;
switch(sig->type) {
case SSH_KEYTYPE_DSS:
r = make_bignum_string(sig->dsa_sig->r);
if (r == NULL) {
return NULL;
}
s = make_bignum_string(sig->dsa_sig->s);
if (s == NULL) {
ssh_string_free(r);
return NULL;
}
memcpy(buffer,
((char *)ssh_string_data(r)) + ssh_string_len(r) - 20,
20);
memcpy(buffer + 20,
((char *)ssh_string_data(s)) + ssh_string_len(s) - 20,
20);
ssh_string_free(r);
ssh_string_free(s);
sig_blob = ssh_string_new(40);
if (sig_blob == NULL) {
return NULL;
}
ssh_string_fill(sig_blob, buffer, 40);
sig_blob = pki_dsa_signature_to_blob(sig);
break;
case SSH_KEYTYPE_RSA:
case SSH_KEYTYPE_RSA1:
@ -1019,6 +1191,8 @@ ssh_string pki_signature_to_blob(const ssh_signature sig)
case SSH_KEYTYPE_ECDSA:
#ifdef HAVE_OPENSSL_ECC
{
ssh_string r;
ssh_string s;
ssh_buffer b;
int rc;
@ -1062,6 +1236,10 @@ ssh_string pki_signature_to_blob(const ssh_signature sig)
break;
}
#endif
case SSH_KEYTYPE_ED25519:
sig_blob = pki_ed25519_sig_to_blob(sig);
break;
default:
case SSH_KEYTYPE_UNKNOWN:
ssh_pki_log("Unknown signature key type: %s", sig->type_c);
return NULL;
@ -1070,6 +1248,67 @@ ssh_string pki_signature_to_blob(const ssh_signature sig)
return sig_blob;
}
static ssh_signature pki_signature_from_rsa_blob(const ssh_key pubkey,
const ssh_string sig_blob,
ssh_signature sig)
{
uint32_t pad_len = 0;
char *blob_orig;
char *blob_padded_data;
ssh_string sig_blob_padded;
size_t rsalen = 0;
size_t len = ssh_string_len(sig_blob);
if (pubkey->rsa == NULL) {
ssh_pki_log("Pubkey RSA field NULL");
goto errout;
}
rsalen = RSA_size(pubkey->rsa);
if (len > rsalen) {
ssh_pki_log("Signature is too big: %lu > %lu",
(unsigned long)len, (unsigned long)rsalen);
goto errout;
}
#ifdef DEBUG_CRYPTO
ssh_pki_log("RSA signature len: %lu", (unsigned long)len);
ssh_print_hexa("RSA signature", ssh_string_data(sig_blob), len);
#endif
if (len == rsalen) {
sig->rsa_sig = ssh_string_copy(sig_blob);
} else {
/* pad the blob to the expected rsalen size */
ssh_pki_log("RSA signature len %lu < %lu",
(unsigned long)len, (unsigned long)rsalen);
pad_len = rsalen - len;
sig_blob_padded = ssh_string_new(rsalen);
if (sig_blob_padded == NULL) {
goto errout;
}
blob_padded_data = (char *) ssh_string_data(sig_blob_padded);
blob_orig = (char *) ssh_string_data(sig_blob);
/* front-pad the buffer with zeroes */
BURN_BUFFER(blob_padded_data, pad_len);
/* fill the rest with the actual signature blob */
memcpy(blob_padded_data + pad_len, blob_orig, len);
sig->rsa_sig = sig_blob_padded;
}
return sig;
errout:
ssh_signature_free(sig);
return NULL;
}
ssh_signature pki_signature_from_blob(const ssh_key pubkey,
const ssh_string sig_blob,
enum ssh_keytypes_e type)
@ -1078,7 +1317,7 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
ssh_string r;
ssh_string s;
size_t len;
size_t rsalen;
int rc;
sig = ssh_signature_new();
if (sig == NULL) {
@ -1142,29 +1381,7 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
break;
case SSH_KEYTYPE_RSA:
case SSH_KEYTYPE_RSA1:
rsalen = RSA_size(pubkey->rsa);
if (len > rsalen) {
ssh_pki_log("Signature is to big size: %lu",
(unsigned long)len);
ssh_signature_free(sig);
return NULL;
}
if (len < rsalen) {
ssh_pki_log("RSA signature len %lu < %lu",
(unsigned long)len, (unsigned long)rsalen);
}
#ifdef DEBUG_CRYPTO
ssh_pki_log("RSA signature len: %lu", (unsigned long)len);
ssh_print_hexa("RSA signature", ssh_string_data(sig_blob), len);
#endif
sig->rsa_sig = ssh_string_copy(sig_blob);
if (sig->rsa_sig == NULL) {
ssh_signature_free(sig);
return NULL;
}
sig = pki_signature_from_rsa_blob(pubkey, sig_blob, sig);
break;
case SSH_KEYTYPE_ECDSA:
#ifdef HAVE_OPENSSL_ECC
@ -1177,7 +1394,6 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
{ /* build ecdsa siganature */
ssh_buffer b;
uint32_t rlen;
int rc;
b = ssh_buffer_new();
if (b == NULL) {
@ -1185,9 +1401,9 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
return NULL;
}
rc = buffer_add_data(b,
ssh_string_data(sig_blob),
ssh_string_len(sig_blob));
rc = ssh_buffer_add_data(b,
ssh_string_data(sig_blob),
ssh_string_len(sig_blob));
if (rc < 0) {
ssh_buffer_free(b);
ssh_signature_free(sig);
@ -1245,6 +1461,14 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
break;
#endif
case SSH_KEYTYPE_ED25519:
rc = pki_ed25519_sig_from_blob(sig, sig_blob);
if (rc == SSH_ERROR){
ssh_signature_free(sig);
return NULL;
}
break;
default:
case SSH_KEYTYPE_UNKNOWN:
ssh_pki_log("Unknown signature type");
ssh_signature_free(sig);
@ -1292,6 +1516,15 @@ int pki_signature_verify(ssh_session session,
return SSH_ERROR;
}
break;
case SSH_KEYTYPE_ED25519:
rc = pki_ed25519_verify(key, sig, hash, hlen);
if (rc != SSH_OK){
ssh_set_error(session,
SSH_FATAL,
"ed25519 signature verification error");
return SSH_ERROR;
}
break;
case SSH_KEYTYPE_ECDSA:
#ifdef HAVE_OPENSSL_ECC
rc = ECDSA_do_verify(hash,
@ -1308,6 +1541,7 @@ int pki_signature_verify(ssh_session session,
break;
#endif
case SSH_KEYTYPE_UNKNOWN:
default:
ssh_set_error(session, SSH_FATAL, "Unknown public key type");
return SSH_ERROR;
}
@ -1319,6 +1553,7 @@ ssh_signature pki_do_sign(const ssh_key privkey,
const unsigned char *hash,
size_t hlen) {
ssh_signature sig;
int rc;
sig = ssh_signature_new();
if (sig == NULL) {
@ -1366,7 +1601,15 @@ ssh_signature pki_do_sign(const ssh_key privkey,
break;
#endif /* HAVE_OPENSSL_ECC */
case SSH_KEYTYPE_ED25519:
rc = pki_ed25519_sign(privkey, sig, hash, hlen);
if (rc != SSH_OK){
ssh_signature_free(sig);
return NULL;
}
break;
case SSH_KEYTYPE_UNKNOWN:
default:
ssh_signature_free(sig);
return NULL;
}
@ -1413,7 +1656,10 @@ ssh_signature pki_do_sign_sessionid(const ssh_key key,
}
break;
#endif
case SSH_KEYTYPE_ED25519:
/* ED25519 handled in caller */
case SSH_KEYTYPE_UNKNOWN:
default:
ssh_signature_free(sig);
return NULL;
}

305
libssh/src/pki_ed25519.c Normal file
View File

@ -0,0 +1,305 @@
/*
* pki_ed25519 .c - PKI infrastructure using ed25519
*
* This file is part of the SSH Library
*
* Copyright (c) 2014 by Aris Adamantiadis
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The SSH Library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the SSH Library; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
#include "libssh/pki.h"
#include "libssh/pki_priv.h"
#include "libssh/ed25519.h"
#include "libssh/buffer.h"
int pki_key_generate_ed25519(ssh_key key)
{
int rc;
key->ed25519_privkey = malloc(sizeof (ed25519_privkey));
if (key->ed25519_privkey == NULL) {
goto error;
}
key->ed25519_pubkey = malloc(sizeof (ed25519_privkey));
if (key->ed25519_privkey == NULL) {
goto error;
}
rc = crypto_sign_ed25519_keypair(*key->ed25519_pubkey,
*key->ed25519_privkey);
if (rc != 0) {
goto error;
}
return SSH_OK;
error:
SAFE_FREE(key->ed25519_privkey);
SAFE_FREE(key->ed25519_pubkey);
return SSH_ERROR;
}
int pki_ed25519_sign(const ssh_key privkey,
ssh_signature sig,
const unsigned char *hash,
size_t hlen)
{
int rc;
uint8_t *buffer;
unsigned long long dlen = 0;
buffer = malloc(hlen + ED25519_SIG_LEN);
if (buffer == NULL) {
return SSH_ERROR;
}
rc = crypto_sign_ed25519(buffer,
&dlen,
hash,
hlen,
*privkey->ed25519_privkey);
if (rc != 0) {
goto error;
}
sig->ed25519_sig = malloc(ED25519_SIG_LEN);
if (sig->ed25519_sig == NULL) {
goto error;
}
/* This shouldn't happen */
if (dlen - hlen != ED25519_SIG_LEN) {
goto error;
}
memcpy(sig->ed25519_sig, buffer, dlen - hlen);
SAFE_FREE(buffer);
return SSH_OK;
error:
SAFE_FREE(buffer);
return SSH_ERROR;
}
int pki_ed25519_verify(const ssh_key pubkey,
ssh_signature sig,
const unsigned char *hash,
size_t hlen)
{
unsigned long long mlen = 0;
uint8_t *buffer;
uint8_t *buffer2;
int rc;
if (pubkey == NULL || sig == NULL ||
hash == NULL || sig->ed25519_sig == NULL) {
return SSH_ERROR;
}
buffer = malloc(hlen + ED25519_SIG_LEN);
if (buffer == NULL) {
return SSH_ERROR;
}
buffer2 = malloc(hlen + ED25519_SIG_LEN);
if (buffer2 == NULL) {
goto error;
}
memcpy(buffer, sig->ed25519_sig, ED25519_SIG_LEN);
memcpy(buffer + ED25519_SIG_LEN, hash, hlen);
rc = crypto_sign_ed25519_open(buffer2,
&mlen,
buffer,
hlen + ED25519_SIG_LEN,
*pubkey->ed25519_pubkey);
BURN_BUFFER(buffer, hlen + ED25519_SIG_LEN);
BURN_BUFFER(buffer2, hlen);
SAFE_FREE(buffer);
SAFE_FREE(buffer2);
if (rc == 0) {
return SSH_OK;
} else {
return SSH_ERROR;
}
error:
SAFE_FREE(buffer);
SAFE_FREE(buffer2);
return SSH_ERROR;
}
/**
* @internal
*
* @brief Compare ed25519 keys if they are equal.
*
* @param[in] k1 The first key to compare.
*
* @param[in] k2 The second key to compare.
*
* @param[in] what What part or type of the key do you want to compare.
*
* @return 0 if equal, 1 if not.
*/
int pki_ed25519_key_cmp(const ssh_key k1,
const ssh_key k2,
enum ssh_keycmp_e what)
{
int cmp;
switch(what) {
case SSH_KEY_CMP_PRIVATE:
if (k1->ed25519_privkey == NULL || k2->ed25519_privkey == NULL) {
return 1;
}
cmp = memcmp(k1->ed25519_privkey, k2->ed25519_privkey, ED25519_SK_LEN);
if (cmp != 0) {
return 1;
}
/* FALL THROUGH */
case SSH_KEY_CMP_PUBLIC:
if (k1->ed25519_pubkey == NULL || k2->ed25519_pubkey == NULL) {
return 1;
}
cmp = memcmp(k1->ed25519_pubkey, k2->ed25519_pubkey, ED25519_PK_LEN);
if (cmp != 0) {
return 1;
}
}
return 0;
}
/**
* @internal
*
* @brief duplicate an ed25519 key
*
* @param[out\ new preinitialized output ssh_ke
*
* @param[in] key key to copy
*
* @return SSH_ERROR on error, SSH_OK on success
*/
int pki_ed25519_key_dup(ssh_key new, const ssh_key key)
{
if (key->ed25519_privkey == NULL || key->ed25519_pubkey == NULL) {
return SSH_ERROR;
}
new->ed25519_privkey = malloc(ED25519_SK_LEN);
if (new->ed25519_privkey == NULL) {
return SSH_ERROR;
}
new->ed25519_pubkey = malloc(ED25519_PK_LEN);
if (new->ed25519_privkey == NULL || new->ed25519_pubkey == NULL){
SAFE_FREE(new->ed25519_privkey);
return SSH_ERROR;
}
memcpy(new->ed25519_privkey, key->ed25519_privkey, ED25519_SK_LEN);
memcpy(new->ed25519_pubkey, key->ed25519_pubkey, ED25519_PK_LEN);
return SSH_OK;
}
/**
* @internal
*
* @brief outputs an ed25519 public key in a blob buffer.
*
* @param[out] buffer output buffer
*
* @param[in] key key to output
*
* @return SSH_ERROR on error, SSH_OK on success
*/
int pki_ed25519_public_key_to_blob(ssh_buffer buffer, ssh_key key)
{
int rc;
if (key->ed25519_pubkey == NULL){
return SSH_ERROR;
}
rc = ssh_buffer_pack(buffer,
"dP",
(uint32_t)ED25519_PK_LEN,
(size_t)ED25519_PK_LEN, key->ed25519_pubkey);
return rc;
}
/**
* @internal
*
* @brief output a signature blob from an ed25519 signature
*
* @param[in] sig signature to convert
*
* @return Signature blob in SSH string, or NULL on error
*/
ssh_string pki_ed25519_sig_to_blob(ssh_signature sig)
{
ssh_string sig_blob;
if (sig->ed25519_sig == NULL) {
return NULL;
}
sig_blob = ssh_string_new(ED25519_SIG_LEN);
if (sig_blob == NULL) {
return NULL;
}
ssh_string_fill(sig_blob, sig->ed25519_sig, ED25519_SIG_LEN);
return sig_blob;
}
/**
* @internal
*
* @brief Convert a signature blob in an ed25519 signature.
*
* @param[out] sig a preinitialized signature
*
* @param[in] sig_blob a signature blob
*
* @return SSH_ERROR on error, SSH_OK on success
*/
int pki_ed25519_sig_from_blob(ssh_signature sig, ssh_string sig_blob)
{
size_t len;
len = ssh_string_len(sig_blob);
if (len != ED25519_SIG_LEN){
ssh_pki_log("Invalid ssh-ed25519 signature len: %zu", len);
return SSH_ERROR;
}
sig->ed25519_sig = malloc(ED25519_SIG_LEN);
if (sig->ed25519_sig == NULL){
return SSH_ERROR;
}
memcpy(sig->ed25519_sig, ssh_string_data(sig_blob), ED25519_SIG_LEN);
return SSH_OK;
}

24
libssh/src/pki_gcrypt.c
View File

@ -388,7 +388,7 @@ static ssh_buffer privatekey_string_to_buffer(const char *pkey, int type,
}
} else {
if(len > 0) {
if (buffer_add_data(buffer, p, len) < 0) {
if (ssh_buffer_add_data(buffer, p, len) < 0) {
ssh_buffer_free(buffer);
SAFE_FREE(iv);
return NULL;
@ -398,7 +398,7 @@ static ssh_buffer privatekey_string_to_buffer(const char *pkey, int type,
get_next_line(p, len);
while(len > 0 && strncmp(p, header_end, header_end_size) != 0) {
if (buffer_add_data(buffer, p, len) < 0) {
if (ssh_buffer_add_data(buffer, p, len) < 0) {
ssh_buffer_free(buffer);
SAFE_FREE(iv);
return NULL;
@ -412,7 +412,7 @@ static ssh_buffer privatekey_string_to_buffer(const char *pkey, int type,
return NULL;
}
if (buffer_add_data(buffer, "\0", 1) < 0) {
if (ssh_buffer_add_data(buffer, "\0", 1) < 0) {
ssh_buffer_free(buffer);
SAFE_FREE(iv);
return NULL;
@ -591,6 +591,19 @@ int pki_key_ecdsa_nid_from_name(const char *name)
}
#endif
ssh_string pki_private_key_to_pem(const ssh_key key,
const char *passphrase,
ssh_auth_callback auth_fn,
void *auth_data)
{
(void) key;
(void) passphrase;
(void) auth_fn;
(void) auth_data;
return NULL;
}
ssh_key pki_private_key_from_base64(const char *b64_key,
const char *passphrase,
ssh_auth_callback auth_fn,
@ -1141,7 +1154,7 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
}
rc = buffer_add_ssh_string(buffer, type_s);
string_free(type_s);
ssh_string_free(type_s);
if (rc < 0) {
ssh_buffer_free(buffer);
return NULL;
@ -1577,7 +1590,7 @@ ssh_signature pki_do_sign(const ssh_key privkey,
return NULL;
}
sig->type = privkey->type;
sig->type_c = privkey->type_c;
switch (privkey->type) {
case SSH_KEYTYPE_DSS:
/* That is to mark the number as positive */
@ -1644,6 +1657,7 @@ ssh_signature pki_do_sign_sessionid(const ssh_key key,
return NULL;
}
sig->type = key->type;
sig->type_c = key->type_c;
switch(key->type) {
case SSH_KEYTYPE_DSS:

56
libssh/src/poll.c
View File

@ -3,8 +3,8 @@
*
* This file is part of the SSH Library
*
* Copyright (c) 2009-2010 by Andreas Schneider <mail@cynapses.org>
* Copyright (c) 2003-2009 by Aris Adamantiadis
* Copyright (c) 2009-2013 by Andreas Schneider <asn@cryptomilk.org>
* Copyright (c) 2003-2013 by Aris Adamantiadis
* Copyright (c) 2009 Aleksandar Kanchev
*
* The SSH Library is free software; you can redistribute it and/or modify
@ -64,6 +64,7 @@
struct ssh_poll_handle_struct {
ssh_poll_ctx ctx;
ssh_session session;
union {
socket_t fd;
size_t idx;
@ -472,14 +473,18 @@ static int ssh_poll_ctx_resize(ssh_poll_ctx ctx, size_t new_size) {
if (pollptrs == NULL) {
return -1;
}
ctx->pollptrs = pollptrs;
pollfds = realloc(ctx->pollfds, sizeof(ssh_pollfd_t) * new_size);
if (pollfds == NULL) {
ctx->pollptrs = realloc(pollptrs, sizeof(ssh_poll_handle) * ctx->polls_allocated);
pollptrs = realloc(ctx->pollptrs, sizeof(ssh_poll_handle) * ctx->polls_allocated);
if (pollptrs == NULL) {
return -1;
}
ctx->pollptrs = pollptrs;
return -1;
}
ctx->pollptrs = pollptrs;
ctx->pollfds = pollfds;
ctx->polls_allocated = new_size;
@ -786,6 +791,10 @@ int ssh_event_add_session(ssh_event event, ssh_session session) {
p = session->default_poll_ctx->pollptrs[i];
ssh_poll_ctx_remove(session->default_poll_ctx, p);
ssh_poll_ctx_add(event->ctx, p);
/* associate the pollhandler with a session so we can put it back
* at ssh_event_free()
*/
p->session = session;
}
#ifdef WITH_SERVER
iterator = ssh_list_get_iterator(event->sessions);
@ -848,12 +857,22 @@ int ssh_event_remove_fd(ssh_event event, socket_t fd) {
for (i = 0; i < used; i++) {
if(fd == event->ctx->pollfds[i].fd) {
ssh_poll_handle p = event->ctx->pollptrs[i];
struct ssh_event_fd_wrapper *pw = p->cb_data;
if (p->session != NULL){
/* we cannot free that handle, it's owned by its session */
continue;
}
if (p->cb == ssh_event_fd_wrapper_callback) {
struct ssh_event_fd_wrapper *pw = p->cb_data;
SAFE_FREE(pw);
}
ssh_poll_ctx_remove(event->ctx, p);
free(pw);
/*
* The free function calls ssh_poll_ctx_remove() and decrements
* event->ctx->polls_used.
*/
ssh_poll_free(p);
rc = SSH_OK;
/* restart the loop */
used = event->ctx->polls_used;
i = 0;
@ -876,7 +895,6 @@ int ssh_event_remove_session(ssh_event event, ssh_session session) {
ssh_poll_handle p;
register size_t i, used;
int rc = SSH_ERROR;
socket_t session_fd;
#ifdef WITH_SERVER
struct ssh_iterator *iterator;
#endif
@ -885,14 +903,15 @@ int ssh_event_remove_session(ssh_event event, ssh_session session) {
return SSH_ERROR;
}
session_fd = ssh_get_fd(session);
used = event->ctx->polls_used;
for(i = 0; i < used; i++) {
if(session_fd == event->ctx->pollfds[i].fd) {
p = event->ctx->pollptrs[i];
p = event->ctx->pollptrs[i];
if(p->session == session){
ssh_poll_ctx_remove(event->ctx, p);
p->session = NULL;
ssh_poll_ctx_add(session->default_poll_ctx, p);
rc = SSH_OK;
used = 0;
}
}
#ifdef WITH_SERVER
@ -919,10 +938,23 @@ int ssh_event_remove_session(ssh_event event, ssh_session session) {
*
*/
void ssh_event_free(ssh_event event) {
if(event == NULL) {
int used, i;
ssh_poll_handle p;
if(event == NULL) {
return;
}
if(event->ctx != NULL) {
used = event->ctx->polls_used;
for(i = 0; i < used; i++) {
p = event->ctx->pollptrs[i];
if(p->session != NULL){
ssh_poll_ctx_remove(event->ctx, p);
ssh_poll_ctx_add(p->session->default_poll_ctx, p);
p->session = NULL;
used = 0;
}
}
ssh_poll_ctx_free(event->ctx);
}
#ifdef WITH_SERVER

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