mirror of
https://github.com/EGroupware/egroupware.git
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307 lines
9.2 KiB
PHP
307 lines
9.2 KiB
PHP
<?php
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/**************************************************************************\
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* eGroupWare API - Password auth and crypt functions *
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* This file written by Miles Lott <milos@groupwhere.org> *
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* Copyright (C) 2004 Miles Lott *
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* Many functions based on code from Frank Thomas <frank@thomas-alfeld.de> *
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* which can be seen at http://www.thomas-alfeld.de/frank/ *
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* Other functions from class.common.inc.php originally from phpGroupWare *
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* ------------------------------------------------------------------------ *
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* This library is free software; you can redistribute it and/or modify it *
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* under the terms of the GNU Lesser General Public License as published by *
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* the Free Software Foundation; either version 2.1 of the License, *
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* or any later version. *
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* This library is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
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* See the GNU Lesser General Public License for more details. *
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* You should have received a copy of the GNU Lesser General Public License *
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* along with this library; if not, write to the Free Software Foundation, *
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
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\**************************************************************************/
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/* $Id$ */
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if(empty($GLOBALS['phpgw_info']['server']['auth_type']))
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{
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$GLOBALS['phpgw_info']['server']['auth_type'] = 'sql';
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}
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include(PHPGW_API_INC.'/class.auth_'.$GLOBALS['phpgw_info']['server']['auth_type'].'.inc.php');
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class auth extends auth_
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{
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var $seeded = False;
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var $error = '';
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/*!
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@function randomstring
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@abstract return a random string of size $size
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@param $size int-size of random string to return
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*/
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function randomstring($size)
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{
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$s = '';
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$random_char = array(
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'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f',
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'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
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'w','x','y','z','A','B','C','D','E','F','G','H','I','J','K','L',
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'M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'
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);
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if(!$this->seeded && phpversion() < '4.2.0')
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{
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list($usec, $sec) = explode(' ', microtime());
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mt_srand((float)$sec + ((float)$usec * 100000));
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$this->seeded = True;
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}
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for ($i=0; $i<$size; $i++)
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{
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$s .= $random_char[mt_rand(1,61)];
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}
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return $s;
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}
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/*!
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@function encrypt_password
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@abstract encrypt password
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@abstract uses the encryption type set in setup and calls the appropriate encryption functions
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@param $password password to encrypt
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*/
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function encrypt_password($password,$sql=False)
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{
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if($sql)
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{
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return $this->encrypt_sql($password);
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}
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return $this->encrypt_ldap($password);
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}
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/*!
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@function encrypt_ldap
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@abstract encrypt password for ldap
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@abstract uses the encryption type set in setup and calls the appropriate encryption functions
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@param $password password to encrypt
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*/
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function encrypt_ldap($password)
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{
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$type = strtolower($GLOBALS['phpgw_info']['server']['ldap_encryption_type']);
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$salt = '';
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switch($type)
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{
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case 'des':
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$salt = $this->randomstring(2);
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$_password = crypt($password, $salt);
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$e_password = sprintf('%s%s', '{crypt}', $_password);
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break;
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case 'md5':
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/* New method taken from the openldap-software list as recommended by
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* Kervin L. Pierre" <kervin@blueprint-tech.com>
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*/
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$e_password = '{md5}' . base64_encode(pack("H*",md5($password)));
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break;
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case 'smd5':
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if(!function_exists('mhash'))
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{
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return False;
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}
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$salt = $this->randomstring(8);
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$hash = mhash(MHASH_MD5, $password . $salt);
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$e_password = '{SMD5}' . base64_encode($hash . $salt);
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break;
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case 'sha':
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if(!function_exists('mhash'))
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{
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return False;
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}
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$e_password = '{SHA}' . base64_encode(mhash(MHASH_SHA1, $password));
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break;
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case 'ssha':
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if(!function_exists('mhash'))
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{
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return False;
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}
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$salt = $this->randomstring(8);
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$hash = mhash(MHASH_SHA1, $password . $salt);
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$e_password = '{SSHA}' . base64_encode($hash . $salt);
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break;
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default:
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return False;
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}
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return $e_password;
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}
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/* Create a password for storage in the phpgw_accounts table */
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function encrypt_sql($password)
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{
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/* Grab configured type, or default to md5() (old method) */
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$type = @$GLOBALS['phpgw_info']['server']['sql_encryption_type']
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? strtolower($GLOBALS['phpgw_info']['server']['sql_encryption_type'])
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: 'md5';
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switch($type)
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{
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case 'crypt':
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if(@defined('CRYPT_STD_DES') && CRYPT_STD_DES == 1)
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{
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$salt = $this->randomstring(2);
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return crypt($password,$salt);
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}
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$this->error = 'no std crypt';
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break;
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case 'blowfish_crypt':
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if(@defined('CRYPT_BLOWFISH') && CRYPT_BLOWFISH == 1)
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{
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$salt = '$2$' . $this->randomstring(13);
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return crypt($password,$salt);
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}
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$this->error = 'no blowfish crypt';
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break;
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case 'md5_crypt':
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if(@defined('CRYPT_MD5') && CRYPT_MD5 == 1)
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{
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$salt = '$1$' . $this->randomstring(9);
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return crypt($password,$salt);
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}
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$this->error = 'no md5 crypt';
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break;
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case 'ext_crypt':
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if(@defined('CRYPT_EXT_DES') && CRYPT_EXT_DES == 1)
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{
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$salt = $this->randomstring(9);
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return crypt($password,$salt);
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}
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$this->error = 'no ext crypt';
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break;
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case 'smd5':
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if(!function_exists('mhash'))
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{
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return False;
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}
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$salt = $this->randomstring(8);
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$hash = mhash(MHASH_MD5, $password . $salt);
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return '{SMD5}' . base64_encode($hash . $salt);
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case 'sha':
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if(!function_exists('mhash'))
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{
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$this->error = 'no sha';
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return False;
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}
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return '{SHA}' . base64_encode(mhash(MHASH_SHA1,$password));
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case 'ssha':
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if(!function_exists('mhash'))
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{
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$this->error = 'no ssha';
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return False;
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}
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$salt = $this->randomstring(8);
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$hash = mhash(MHASH_SHA1, $password . $salt);
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return '{SSHA}' . base64_encode($hash . $salt);
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case 'md5':
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default:
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/* This is the old standard for password storage in SQL */
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return md5($password);
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}
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$this->error = $this->error ? $this->error : 'no valid encryption available';
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return False;
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}
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/**
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@function smd5_compare
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@abstract compare SHA-encrypted passwords for authentication
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@param $form_val user input value for comparison
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@param $db_val stored value (from database)
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@return boolean True on successful comparison
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*/
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function smd5_compare($form_val,$db_val)
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{
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/* Start with the first char after {SMD5} */
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$hash = base64_decode(substr($db_val,6));
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$orig_hash = substr($hash, 0, 16);
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$salt = substr($hash, 16);
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$new_hash = mhash(MHASH_MD5,$form_val . $salt);
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//echo '<br> DB: ' . base64_encode($orig_hash) . '<br>FORM: ' . base64_encode($new_hash);
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if(strcmp($orig_hash,$new_hash) == 0)
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{
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return True;
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}
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return False;
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}
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/**
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@function sha_compare
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@abstract compare SHA-encrypted passwords for authentication
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@param $form_val user input value for comparison
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@param $db_val stored value (from database)
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@return boolean True on successful comparison
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*/
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function sha_compare($form_val,$db_val)
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{
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/* Start with the first char after {SHA} */
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$hash = base64_decode(substr($db_val,5));
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$new_hash = mhash(MHASH_SHA1,$form_val);
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//echo '<br> DB: ' . base64_encode($orig_hash) . '<br>FORM: ' . base64_encode($new_hash);
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if(strcmp($hash,$new_hash) == 0)
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{
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return True;
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}
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return False;
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}
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/**
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@function ssha_compare
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@abstract compare SSHA-encrypted passwords for authentication
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@param $form_val user input value for comparison
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@param $db_val stored value (from database)
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@return boolean True on successful comparison
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*/
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function ssha_compare($form_val,$db_val)
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{
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/* Start with the first char after {SSHA} */
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$hash = base64_decode(substr($db_val, 6));
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// SHA-1 hashes are 160 bits long
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$orig_hash = substr($hash, 0, 20);
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$salt = substr($hash, 20);
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$new_hash = mhash(MHASH_SHA1, $form_val . $salt);
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if(strcmp($orig_hash,$new_hash) == 0)
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{
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return True;
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}
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return False;
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}
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/**
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@function crypt_compare
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@abstract compare crypted passwords for authentication whether des,ext_des,md5, or blowfish crypt
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@param $form_val user input value for comparison
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@param $db_val stored value (from database)
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@param $type crypt() type
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@return boolean True on successful comparison
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*/
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function crypt_compare($form_val,$db_val,$type)
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{
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$saltlen = array(
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'blowfish_crypt' => 16,
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'md5_crypt' => 12,
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'ext_crypt' => 9,
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'crypt' => 2
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);
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// PHP's crypt(): salt + hash
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// notice: "The encryption type is triggered by the salt argument."
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$salt = substr($db_val, 0, (int)$saltlen[$type]);
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$new_hash = crypt($form_val, $salt);
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if(strcmp($db_val,$new_hash) == 0)
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{
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return True;
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}
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return False;
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}
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}
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?>
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