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Merge pull request #148 from jetwhiz/fork-master

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Bugfix: Labels are backwards for "Block" and "Block32" encoding
Set default to Block32 on OSX and Windows.
This commit is contained in:
Valient Gough 2016-03-24 10:31:12 -07:00
commit 0426051a3e
3 changed files with 28 additions and 15 deletions
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22
encfs/BlockNameIO.cpp
View File

@ -71,7 +71,7 @@ static bool BlockIO32_registered = NameIO::Register(
// description of block name encoding algorithm..
// xgroup(setup)
gettext_noop(
"Block encoding with base32 output for case-sensitive systems"),
"Block encoding with base32 output for case-insensitive systems"),
BlockNameIO::CurrentInterface(true), NewBlockNameIO32);
/*
@ -91,9 +91,9 @@ static bool BlockIO32_registered = NameIO::Register(
- Version 4.0 adds support for base32, creating names more suitable for
case-insensitive filesystems (eg Mac).
*/
Interface BlockNameIO::CurrentInterface(bool caseSensitive) {
Interface BlockNameIO::CurrentInterface(bool caseInsensitive) {
// implement major version 4 plus support for two prior versions
if (caseSensitive)
if (caseInsensitive)
return Interface("nameio/block32", 4, 0, 2);
else
return Interface("nameio/block", 4, 0, 2);
@ -101,12 +101,12 @@ Interface BlockNameIO::CurrentInterface(bool caseSensitive) {
BlockNameIO::BlockNameIO(const rel::Interface &iface,
const shared_ptr<Cipher> &cipher, const CipherKey &key,
int blockSize, bool caseSensitiveEncoding)
int blockSize, bool caseInsensitiveEncoding)
: _interface(iface.current()),
_bs(blockSize),
_cipher(cipher),
_key(key),
_caseSensitive(caseSensitiveEncoding) {
_caseInsensitive(caseInsensitiveEncoding) {
// just to be safe..
rAssert(blockSize < 128);
}
@ -114,7 +114,7 @@ BlockNameIO::BlockNameIO(const rel::Interface &iface,
BlockNameIO::~BlockNameIO() {}
Interface BlockNameIO::interface() const {
return CurrentInterface(_caseSensitive);
return CurrentInterface(_caseInsensitive);
}
int BlockNameIO::maxEncodedNameLen(int plaintextNameLen) const {
@ -122,14 +122,14 @@ int BlockNameIO::maxEncodedNameLen(int plaintextNameLen) const {
// the size of too much space rather then too little.
int numBlocks = (plaintextNameLen + _bs) / _bs;
int encodedNameLen = numBlocks * _bs + 2; // 2 checksum bytes
if (_caseSensitive)
if (_caseInsensitive)
return B256ToB32Bytes(encodedNameLen);
else
return B256ToB64Bytes(encodedNameLen);
}
int BlockNameIO::maxDecodedNameLen(int encodedNameLen) const {
int decLen256 = _caseSensitive ? B32ToB256Bytes(encodedNameLen)
int decLen256 = _caseInsensitive ? B32ToB256Bytes(encodedNameLen)
: B64ToB256Bytes(encodedNameLen);
return decLen256 - 2; // 2 checksum bytes removed..
}
@ -166,7 +166,7 @@ int BlockNameIO::encodeName(const char *plaintextName, int length, uint64_t *iv,
int encodedStreamLen = length + 2 + padding;
int encLen;
if (_caseSensitive) {
if (_caseInsensitive) {
encLen = B256ToB32Bytes(encodedStreamLen);
changeBase2Inline((unsigned char *)encodedName, encodedStreamLen, 8, 5,
@ -186,7 +186,7 @@ int BlockNameIO::encodeName(const char *plaintextName, int length, uint64_t *iv,
int BlockNameIO::decodeName(const char *encodedName, int length, uint64_t *iv,
char *plaintextName, int bufferLength) const {
int decLen256 =
_caseSensitive ? B32ToB256Bytes(length) : B64ToB256Bytes(length);
_caseInsensitive ? B32ToB256Bytes(length) : B64ToB256Bytes(length);
int decodedStreamLen = decLen256 - 2;
// don't bother trying to decode files which are too small
@ -198,7 +198,7 @@ int BlockNameIO::decodeName(const char *encodedName, int length, uint64_t *iv,
BUFFER_INIT(tmpBuf, 32, (unsigned int)length);
// decode into tmpBuf,
if (_caseSensitive) {
if (_caseInsensitive) {
AsciiToB32((unsigned char *)tmpBuf, (unsigned char *)encodedName, length);
changeBase2Inline((unsigned char *)tmpBuf, length, 5, 8, false);
} else {

6
encfs/BlockNameIO.h
View File

@ -38,11 +38,11 @@ class Cipher;
*/
class BlockNameIO : public NameIO {
public:
static rel::Interface CurrentInterface(bool caseSensitive = false);
static rel::Interface CurrentInterface(bool caseInsensitive = false);
BlockNameIO(const rel::Interface &iface, const shared_ptr<Cipher> &cipher,
const CipherKey &key, int blockSize,
bool caseSensitiveEncoding = false);
bool caseInsensitiveEncoding = false);
virtual ~BlockNameIO();
virtual rel::Interface interface() const;
@ -64,7 +64,7 @@ class BlockNameIO : public NameIO {
int _bs;
shared_ptr<Cipher> _cipher;
CipherKey _key;
bool _caseSensitive;
bool _caseInsensitive;
};
#endif

13
encfs/FileUtils.cpp
View File

@ -1016,7 +1016,14 @@ RootPtr createV6Config(EncFS_Context *ctx, const shared_ptr<EncFS_Opts> &opts) {
keySize = 256;
blockSize = DefaultBlockSize;
alg = findCipherAlgorithm("AES", keySize);
// If case-insensitive system, opt for Block32 filename encoding
#if defined(__APPLE__) || defined(WIN32)
nameIOIface = BlockNameIO::CurrentInterface(true);
#else
nameIOIface = BlockNameIO::CurrentInterface();
#endif
blockMACBytes = 8;
blockMACRandBytes = 0; // using uniqueIV, so this isn't necessary
externalIV = true;
@ -1029,7 +1036,13 @@ RootPtr createV6Config(EncFS_Context *ctx, const shared_ptr<EncFS_Opts> &opts) {
keySize = 192;
blockSize = DefaultBlockSize;
alg = findCipherAlgorithm("AES", keySize);
// If case-insensitive system, opt for Block32 filename encoding
#if defined(__APPLE__) || defined(WIN32)
nameIOIface = BlockNameIO::CurrentInterface(true);
#else
nameIOIface = BlockNameIO::CurrentInterface();
#endif
if (opts->requireMac) {
blockMACBytes = 8;