GNUsocial/gnu-social
4
0
Fork 1
Code Issues Releases Wiki Activity

phpseclib extlib updated from phpseclib.sf.net

Browse Source
This commit is contained in:
Mikael Nordfeldth 2013-09-24 02:09:37 +02:00
parent 49b755912f
commit f7719b57f2
11 changed files with 17019 additions and 10443 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1019
plugins/OStatus/extlib/Crypt/AES.php
View File

File diff suppressed because it is too large Load Diff

1468
plugins/OStatus/extlib/Crypt/Blowfish.php Normal file
View File

File diff suppressed because it is too large Load Diff

3481
plugins/OStatus/extlib/Crypt/DES.php
View File

File diff suppressed because it is too large Load Diff

1639
plugins/OStatus/extlib/Crypt/Hash.php
View File

File diff suppressed because it is too large Load Diff

985
plugins/OStatus/extlib/Crypt/RC4.php
View File

@ -1,493 +1,492 @@
<?php <?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/** /**
* Pure-PHP implementation of RC4. * Pure-PHP implementation of RC4.
* *
* Uses mcrypt, if available, and an internal implementation, otherwise. * Uses mcrypt, if available, and an internal implementation, otherwise.
* *
* PHP versions 4 and 5 * PHP versions 4 and 5
* *
* Useful resources are as follows: * Useful resources are as follows:
* *
* - {@link http://www.mozilla.org/projects/security/pki/nss/draft-kaukonen-cipher-arcfour-03.txt ARCFOUR Algorithm} * - {@link http://www.mozilla.org/projects/security/pki/nss/draft-kaukonen-cipher-arcfour-03.txt ARCFOUR Algorithm}
* - {@link http://en.wikipedia.org/wiki/RC4 - Wikipedia: RC4} * - {@link http://en.wikipedia.org/wiki/RC4 - Wikipedia: RC4}
* *
* RC4 is also known as ARCFOUR or ARC4. The reason is elaborated upon at Wikipedia. This class is named RC4 and not * RC4 is also known as ARCFOUR or ARC4. The reason is elaborated upon at Wikipedia. This class is named RC4 and not
* ARCFOUR or ARC4 because RC4 is how it is refered to in the SSH1 specification. * ARCFOUR or ARC4 because RC4 is how it is referred to in the SSH1 specification.
* *
* Here's a short example of how to use this library: * Here's a short example of how to use this library:
* <code> * <code>
* <?php * <?php
* include('Crypt/RC4.php'); * include('Crypt/RC4.php');
* *
* $rc4 = new Crypt_RC4(); * $rc4 = new Crypt_RC4();
* *
* $rc4->setKey('abcdefgh'); * $rc4->setKey('abcdefgh');
* *
* $size = 10 * 1024; * $size = 10 * 1024;
* $plaintext = ''; * $plaintext = '';
* for ($i = 0; $i < $size; $i++) { * for ($i = 0; $i < $size; $i++) {
* $plaintext.= 'a'; * $plaintext.= 'a';
* } * }
* *
* echo $rc4->decrypt($rc4->encrypt($plaintext)); * echo $rc4->decrypt($rc4->encrypt($plaintext));
* ?> * ?>
* </code> * </code>
* *
* LICENSE: This library is free software; you can redistribute it and/or * LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy
* modify it under the terms of the GNU Lesser General Public * of this software and associated documentation files (the "Software"), to deal
* License as published by the Free Software Foundation; either * in the Software without restriction, including without limitation the rights
* version 2.1 of the License, or (at your option) any later version. * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* * copies of the Software, and to permit persons to whom the Software is
* This library is distributed in the hope that it will be useful, * furnished to do so, subject to the following conditions:
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * The above copyright notice and this permission notice shall be included in
* Lesser General Public License for more details. * all copies or substantial portions of the Software.
* *
* You should have received a copy of the GNU Lesser General Public * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* License along with this library; if not, write to the Free Software * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* MA 02111-1307 USA * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* @category Crypt * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* @package Crypt_RC4 * THE SOFTWARE.
* @author Jim Wigginton <terrafrost@php.net> *
* @copyright MMVII Jim Wigginton * @category Crypt
* @license http://www.gnu.org/licenses/lgpl.txt * @package Crypt_RC4
* @version $Id: RC4.php,v 1.8 2009/06/09 04:00:38 terrafrost Exp $ * @author Jim Wigginton <terrafrost@php.net>
* @link http://phpseclib.sourceforge.net * @copyright MMVII Jim Wigginton
*/ * @license http://www.opensource.org/licenses/mit-license.html MIT License
* @link http://phpseclib.sourceforge.net
/**#@+ */
* @access private
* @see Crypt_RC4::Crypt_RC4() /**#@+
*/ * @access private
/** * @see Crypt_RC4::Crypt_RC4()
* Toggles the internal implementation */
*/ /**
define('CRYPT_RC4_MODE_INTERNAL', 1); * Toggles the internal implementation
/** */
* Toggles the mcrypt implementation define('CRYPT_RC4_MODE_INTERNAL', 1);
*/ /**
define('CRYPT_RC4_MODE_MCRYPT', 2); * Toggles the mcrypt implementation
/**#@-*/ */
define('CRYPT_RC4_MODE_MCRYPT', 2);
/**#@+ /**#@-*/
* @access private
* @see Crypt_RC4::_crypt() /**#@+
*/ * @access private
define('CRYPT_RC4_ENCRYPT', 0); * @see Crypt_RC4::_crypt()
define('CRYPT_RC4_DECRYPT', 1); */
/**#@-*/ define('CRYPT_RC4_ENCRYPT', 0);
define('CRYPT_RC4_DECRYPT', 1);
/** /**#@-*/
* Pure-PHP implementation of RC4.
* /**
* @author Jim Wigginton <terrafrost@php.net> * Pure-PHP implementation of RC4.
* @version 0.1.0 *
* @access public * @author Jim Wigginton <terrafrost@php.net>
* @package Crypt_RC4 * @version 0.1.0
*/ * @access public
class Crypt_RC4 { * @package Crypt_RC4
/** */
* The Key class Crypt_RC4 {
* /**
* @see Crypt_RC4::setKey() * The Key
* @var String *
* @access private * @see Crypt_RC4::setKey()
*/ * @var String
var $key = "\0"; * @access private
*/
/** var $key = "\0";
* The Key Stream for encryption
* /**
* If CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT, this will be equal to the mcrypt object * The Key Stream for encryption
* *
* @see Crypt_RC4::setKey() * If CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT, this will be equal to the mcrypt object
* @var Array *
* @access private * @see Crypt_RC4::setKey()
*/ * @var Array
var $encryptStream = false; * @access private
*/
/** var $encryptStream = false;
* The Key Stream for decryption
* /**
* If CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT, this will be equal to the mcrypt object * The Key Stream for decryption
* *
* @see Crypt_RC4::setKey() * If CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT, this will be equal to the mcrypt object
* @var Array *
* @access private * @see Crypt_RC4::setKey()
*/ * @var Array
var $decryptStream = false; * @access private
*/
/** var $decryptStream = false;
* The $i and $j indexes for encryption
* /**
* @see Crypt_RC4::_crypt() * The $i and $j indexes for encryption
* @var Integer *
* @access private * @see Crypt_RC4::_crypt()
*/ * @var Integer
var $encryptIndex = 0; * @access private
*/
/** var $encryptIndex = 0;
* The $i and $j indexes for decryption
* /**
* @see Crypt_RC4::_crypt() * The $i and $j indexes for decryption
* @var Integer *
* @access private * @see Crypt_RC4::_crypt()
*/ * @var Integer
var $decryptIndex = 0; * @access private
*/
/** var $decryptIndex = 0;
* MCrypt parameters
* /**
* @see Crypt_RC4::setMCrypt() * The Encryption Algorithm
* @var Array *
* @access private * Only used if CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT. Only possible values are MCRYPT_RC4 or MCRYPT_ARCFOUR.
*/ *
var $mcrypt = array('', ''); * @see Crypt_RC4::Crypt_RC4()
* @var Integer
/** * @access private
* The Encryption Algorithm */
* var $mode;
* Only used if CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT. Only possible values are MCRYPT_RC4 or MCRYPT_ARCFOUR.
* /**
* @see Crypt_RC4::Crypt_RC4() * Continuous Buffer status
* @var Integer *
* @access private * @see Crypt_RC4::enableContinuousBuffer()
*/ * @var Boolean
var $mode; * @access private
*/
/** var $continuousBuffer = false;
* Default Constructor.
* /**
* Determines whether or not the mcrypt extension should be used. * Default Constructor.
* *
* @param optional Integer $mode * Determines whether or not the mcrypt extension should be used.
* @return Crypt_RC4 *
* @access public * @return Crypt_RC4
*/ * @access public
function Crypt_RC4() */
{ function Crypt_RC4()
if ( !defined('CRYPT_RC4_MODE') ) { {
switch (true) { if ( !defined('CRYPT_RC4_MODE') ) {
case extension_loaded('mcrypt') && (defined('MCRYPT_ARCFOUR') || defined('MCRYPT_RC4')): switch (true) {
// i'd check to see if rc4 was supported, by doing in_array('arcfour', mcrypt_list_algorithms('')), case extension_loaded('mcrypt') && (defined('MCRYPT_ARCFOUR') || defined('MCRYPT_RC4')) && in_array('arcfour', mcrypt_list_algorithms()):
// but since that can be changed after the object has been created, there doesn't seem to be define('CRYPT_RC4_MODE', CRYPT_RC4_MODE_MCRYPT);
// a lot of point... break;
define('CRYPT_RC4_MODE', CRYPT_RC4_MODE_MCRYPT); default:
break; define('CRYPT_RC4_MODE', CRYPT_RC4_MODE_INTERNAL);
default: }
define('CRYPT_RC4_MODE', CRYPT_RC4_MODE_INTERNAL); }
}
} switch ( CRYPT_RC4_MODE ) {
case CRYPT_RC4_MODE_MCRYPT:
switch ( CRYPT_RC4_MODE ) { switch (true) {
case CRYPT_RC4_MODE_MCRYPT: case defined('MCRYPT_ARCFOUR'):
switch (true) { $this->mode = MCRYPT_ARCFOUR;
case defined('MCRYPT_ARCFOUR'): break;
$this->mode = MCRYPT_ARCFOUR; case defined('MCRYPT_RC4');
break; $this->mode = MCRYPT_RC4;
case defined('MCRYPT_RC4'); }
$this->mode = MCRYPT_RC4; $this->encryptStream = mcrypt_module_open($this->mode, '', MCRYPT_MODE_STREAM, '');
} $this->decryptStream = mcrypt_module_open($this->mode, '', MCRYPT_MODE_STREAM, '');
}
} }
}
/**
* Sets the key. /**
* * Sets the key.
* Keys can be between 1 and 256 bytes long. If they are longer then 256 bytes, the first 256 bytes will *
* be used. If no key is explicitly set, it'll be assumed to be a single null byte. * Keys can be between 1 and 256 bytes long. If they are longer then 256 bytes, the first 256 bytes will
* * be used. If no key is explicitly set, it'll be assumed to be a single null byte.
* @access public *
* @param String $key * @access public
*/ * @param String $key
function setKey($key) */
{ function setKey($key)
$this->key = $key; {
$this->key = $key;
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) {
return; if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) {
} mcrypt_generic_init($this->encryptStream, $this->key, '');
mcrypt_generic_init($this->decryptStream, $this->key, '');
$keyLength = strlen($key); return;
$keyStream = array(); }
for ($i = 0; $i < 256; $i++) {
$keyStream[$i] = $i; $keyLength = strlen($key);
} $keyStream = array();
$j = 0; for ($i = 0; $i < 256; $i++) {
for ($i = 0; $i < 256; $i++) { $keyStream[$i] = $i;
$j = ($j + $keyStream[$i] + ord($key[$i % $keyLength])) & 255; }
$temp = $keyStream[$i]; $j = 0;
$keyStream[$i] = $keyStream[$j]; for ($i = 0; $i < 256; $i++) {
$keyStream[$j] = $temp; $j = ($j + $keyStream[$i] + ord($key[$i % $keyLength])) & 255;
} $temp = $keyStream[$i];
$keyStream[$i] = $keyStream[$j];
$this->encryptIndex = $this->decryptIndex = array(0, 0); $keyStream[$j] = $temp;
$this->encryptStream = $this->decryptStream = $keyStream; }
}
$this->encryptIndex = $this->decryptIndex = array(0, 0);
/** $this->encryptStream = $this->decryptStream = $keyStream;
* Dummy function. }
*
* Some protocols, such as WEP, prepend an "initialization vector" to the key, effectively creating a new key [1]. /**
* If you need to use an initialization vector in this manner, feel free to prepend it to the key, yourself, before * Sets the password.
* calling setKey(). *
* * Depending on what $method is set to, setPassword()'s (optional) parameters are as follows:
* [1] WEP's initialization vectors (IV's) are used in a somewhat insecure way. Since, in that protocol, * {@link http://en.wikipedia.org/wiki/PBKDF2 pbkdf2}:
* the IV's are relatively easy to predict, an attack described by * $hash, $salt, $count, $dkLen
* {@link http://www.drizzle.com/~aboba/IEEE/rc4_ksaproc.pdf Scott Fluhrer, Itsik Mantin, and Adi Shamir} *
* can be used to quickly guess at the rest of the key. The following links elaborate: * @param String $password
* * @param optional String $method
* {@link http://www.rsa.com/rsalabs/node.asp?id=2009 http://www.rsa.com/rsalabs/node.asp?id=2009} * @access public
* {@link http://en.wikipedia.org/wiki/Related_key_attack http://en.wikipedia.org/wiki/Related_key_attack} */
* function setPassword($password, $method = 'pbkdf2')
* @param String $iv {
* @see Crypt_RC4::setKey() $key = '';
* @access public
*/ switch ($method) {
function setIV($iv) default: // 'pbkdf2'
{ list(, , $hash, $salt, $count) = func_get_args();
} if (!isset($hash)) {
$hash = 'sha1';
/** }
* Sets MCrypt parameters. (optional) // WPA and WPA2 use the SSID as the salt
* if (!isset($salt)) {
* If MCrypt is being used, empty strings will be used, unless otherwise specified. $salt = 'phpseclib/salt';
* }
* @link http://php.net/function.mcrypt-module-open#function.mcrypt-module-open // RFC2898#section-4.2 uses 1,000 iterations by default
* @access public // WPA and WPA2 use 4,096.
* @param optional Integer $algorithm_directory if (!isset($count)) {
* @param optional Integer $mode_directory $count = 1000;
*/ }
function setMCrypt($algorithm_directory = '', $mode_directory = '') if (!isset($dkLen)) {
{ $dkLen = 128;
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) { }
$this->mcrypt = array($algorithm_directory, $mode_directory);
$this->_closeMCrypt(); if (!class_exists('Crypt_Hash')) {
} require_once('Crypt/Hash.php');
} }
/** $i = 1;
* Encrypts a message. while (strlen($key) < $dkLen) {
* //$dk.= $this->_pbkdf($password, $salt, $count, $i++);
* @see Crypt_RC4::_crypt() $hmac = new Crypt_Hash();
* @access public $hmac->setHash($hash);
* @param String $plaintext $hmac->setKey($password);
*/ $f = $u = $hmac->hash($salt . pack('N', $i++));
function encrypt($plaintext) for ($j = 2; $j <= $count; $j++) {
{ $u = $hmac->hash($u);
return $this->_crypt($plaintext, CRYPT_RC4_ENCRYPT); $f^= $u;
} }
$key.= $f;
/** }
* Decrypts a message. }
*
* $this->decrypt($this->encrypt($plaintext)) == $this->encrypt($this->encrypt($plaintext)). $this->setKey(substr($key, 0, $dkLen));
* Atleast if the continuous buffer is disabled. }
*
* @see Crypt_RC4::_crypt() /**
* @access public * Dummy function.
* @param String $ciphertext *
*/ * Some protocols, such as WEP, prepend an "initialization vector" to the key, effectively creating a new key [1].
function decrypt($ciphertext) * If you need to use an initialization vector in this manner, feel free to prepend it to the key, yourself, before
{ * calling setKey().
return $this->_crypt($ciphertext, CRYPT_RC4_DECRYPT); *
} * [1] WEP's initialization vectors (IV's) are used in a somewhat insecure way. Since, in that protocol,
* the IV's are relatively easy to predict, an attack described by
/** * {@link http://www.drizzle.com/~aboba/IEEE/rc4_ksaproc.pdf Scott Fluhrer, Itsik Mantin, and Adi Shamir}
* Encrypts or decrypts a message. * can be used to quickly guess at the rest of the key. The following links elaborate:
* *
* @see Crypt_RC4::encrypt() * {@link http://www.rsa.com/rsalabs/node.asp?id=2009 http://www.rsa.com/rsalabs/node.asp?id=2009}
* @see Crypt_RC4::decrypt() * {@link http://en.wikipedia.org/wiki/Related_key_attack http://en.wikipedia.org/wiki/Related_key_attack}
* @access private *
* @param String $text * @param String $iv
* @param Integer $mode * @see Crypt_RC4::setKey()
*/ * @access public
function _crypt($text, $mode) */
{ function setIV($iv)
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) { {
$keyStream = $mode == CRYPT_RC4_ENCRYPT ? 'encryptStream' : 'decryptStream'; }
if ($this->$keyStream === false) { /**
$this->$keyStream = mcrypt_module_open($this->mode, $this->mcrypt[0], MCRYPT_MODE_STREAM, $this->mcrypt[1]); * Encrypts a message.
mcrypt_generic_init($this->$keyStream, $this->key, ''); *
} else if (!$this->continuousBuffer) { * @see Crypt_RC4::_crypt()
mcrypt_generic_init($this->$keyStream, $this->key, ''); * @access public
} * @param String $plaintext
$newText = mcrypt_generic($this->$keyStream, $text); */
if (!$this->continuousBuffer) { function encrypt($plaintext)
mcrypt_generic_deinit($this->$keyStream); {
} return $this->_crypt($plaintext, CRYPT_RC4_ENCRYPT);
}
return $newText;
} /**
* Decrypts a message.
if ($this->encryptStream === false) { *
$this->setKey($this->key); * $this->decrypt($this->encrypt($plaintext)) == $this->encrypt($this->encrypt($plaintext)).
} * Atleast if the continuous buffer is disabled.
*
switch ($mode) { * @see Crypt_RC4::_crypt()
case CRYPT_RC4_ENCRYPT: * @access public
$keyStream = $this->encryptStream; * @param String $ciphertext
list($i, $j) = $this->encryptIndex; */
break; function decrypt($ciphertext)
case CRYPT_RC4_DECRYPT: {
$keyStream = $this->decryptStream; return $this->_crypt($ciphertext, CRYPT_RC4_DECRYPT);
list($i, $j) = $this->decryptIndex; }
}
/**
$newText = ''; * Encrypts or decrypts a message.
for ($k = 0; $k < strlen($text); $k++) { *
$i = ($i + 1) & 255; * @see Crypt_RC4::encrypt()
$j = ($j + $keyStream[$i]) & 255; * @see Crypt_RC4::decrypt()
$temp = $keyStream[$i]; * @access private
$keyStream[$i] = $keyStream[$j]; * @param String $text
$keyStream[$j] = $temp; * @param Integer $mode
$temp = $keyStream[($keyStream[$i] + $keyStream[$j]) & 255]; */
$newText.= chr(ord($text[$k]) ^ $temp); function _crypt($text, $mode)
} {
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) {
if ($this->continuousBuffer) { $keyStream = $mode == CRYPT_RC4_ENCRYPT ? 'encryptStream' : 'decryptStream';
switch ($mode) {
case CRYPT_RC4_ENCRYPT: if (!$this->continuousBuffer) {
$this->encryptStream = $keyStream; mcrypt_generic_init($this->$keyStream, $this->key, '');
$this->encryptIndex = array($i, $j); }
break;
case CRYPT_RC4_DECRYPT: return mcrypt_generic($this->$keyStream, $text);
$this->decryptStream = $keyStream; }
$this->decryptIndex = array($i, $j);
} if ($this->encryptStream === false) {
} $this->setKey($this->key);
}
return $newText;
} switch ($mode) {
case CRYPT_RC4_ENCRYPT:
/** $keyStream = $this->encryptStream;
* Treat consecutive "packets" as if they are a continuous buffer. list($i, $j) = $this->encryptIndex;
* break;
* Say you have a 16-byte plaintext $plaintext. Using the default behavior, the two following code snippets case CRYPT_RC4_DECRYPT:
* will yield different outputs: $keyStream = $this->decryptStream;
* list($i, $j) = $this->decryptIndex;
* <code> }
* echo $rc4->encrypt(substr($plaintext, 0, 8));
* echo $rc4->encrypt(substr($plaintext, 8, 8)); $newText = '';
* </code> for ($k = 0; $k < strlen($text); $k++) {
* <code> $i = ($i + 1) & 255;
* echo $rc4->encrypt($plaintext); $j = ($j + $keyStream[$i]) & 255;
* </code> $temp = $keyStream[$i];
* $keyStream[$i] = $keyStream[$j];
* The solution is to enable the continuous buffer. Although this will resolve the above discrepancy, it creates $keyStream[$j] = $temp;
* another, as demonstrated with the following: $temp = $keyStream[($keyStream[$i] + $keyStream[$j]) & 255];
* $newText.= chr(ord($text[$k]) ^ $temp);
* <code> }
* $rc4->encrypt(substr($plaintext, 0, 8));
* echo $rc4->decrypt($des->encrypt(substr($plaintext, 8, 8))); if ($this->continuousBuffer) {
* </code> switch ($mode) {
* <code> case CRYPT_RC4_ENCRYPT:
* echo $rc4->decrypt($des->encrypt(substr($plaintext, 8, 8))); $this->encryptStream = $keyStream;
* </code> $this->encryptIndex = array($i, $j);
* break;
* With the continuous buffer disabled, these would yield the same output. With it enabled, they yield different case CRYPT_RC4_DECRYPT:
* outputs. The reason is due to the fact that the initialization vector's change after every encryption / $this->decryptStream = $keyStream;
* decryption round when the continuous buffer is enabled. When it's disabled, they remain constant. $this->decryptIndex = array($i, $j);
* }
* Put another way, when the continuous buffer is enabled, the state of the Crypt_DES() object changes after each }
* encryption / decryption round, whereas otherwise, it'd remain constant. For this reason, it's recommended that
* continuous buffers not be used. They do offer better security and are, in fact, sometimes required (SSH uses them), return $newText;
* however, they are also less intuitive and more likely to cause you problems. }
*
* @see Crypt_RC4::disableContinuousBuffer() /**
* @access public * Treat consecutive "packets" as if they are a continuous buffer.
*/ *
function enableContinuousBuffer() * Say you have a 16-byte plaintext $plaintext. Using the default behavior, the two following code snippets
{ * will yield different outputs:
$this->continuousBuffer = true; *
} * <code>
* echo $rc4->encrypt(substr($plaintext, 0, 8));
/** * echo $rc4->encrypt(substr($plaintext, 8, 8));
* Treat consecutive packets as if they are a discontinuous buffer. * </code>
* * <code>
* The default behavior. * echo $rc4->encrypt($plaintext);
* * </code>
* @see Crypt_RC4::enableContinuousBuffer() *
* @access public * The solution is to enable the continuous buffer. Although this will resolve the above discrepancy, it creates
*/ * another, as demonstrated with the following:
function disableContinuousBuffer() *
{ * <code>
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_INTERNAL ) { * $rc4->encrypt(substr($plaintext, 0, 8));
$this->encryptIndex = $this->decryptIndex = array(0, 0); * echo $rc4->decrypt($des->encrypt(substr($plaintext, 8, 8)));
$this->setKey($this->key); * </code>
} * <code>
* echo $rc4->decrypt($des->encrypt(substr($plaintext, 8, 8)));
$this->continuousBuffer = false; * </code>
} *
* With the continuous buffer disabled, these would yield the same output. With it enabled, they yield different
/** * outputs. The reason is due to the fact that the initialization vector's change after every encryption /
* Dummy function. * decryption round when the continuous buffer is enabled. When it's disabled, they remain constant.
* *
* Since RC4 is a stream cipher and not a block cipher, no padding is necessary. The only reason this function is * Put another way, when the continuous buffer is enabled, the state of the Crypt_DES() object changes after each
* included is so that you can switch between a block cipher and a stream cipher transparently. * encryption / decryption round, whereas otherwise, it'd remain constant. For this reason, it's recommended that
* * continuous buffers not be used. They do offer better security and are, in fact, sometimes required (SSH uses them),
* @see Crypt_RC4::disablePadding() * however, they are also less intuitive and more likely to cause you problems.
* @access public *
*/ * @see Crypt_RC4::disableContinuousBuffer()
function enablePadding() * @access public
{ */
} function enableContinuousBuffer()
{
/** if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) {
* Dummy function. mcrypt_generic_init($this->encryptStream, $this->key, '');
* mcrypt_generic_init($this->decryptStream, $this->key, '');
* @see Crypt_RC4::enablePadding() }
* @access public
*/ $this->continuousBuffer = true;
function disablePadding() }
{
} /**
* Treat consecutive packets as if they are a discontinuous buffer.
/** *
* Class destructor. * The default behavior.
* *
* Will be called, automatically, if you're using PHP5. If you're using PHP4, call it yourself. Only really * @see Crypt_RC4::enableContinuousBuffer()
* needs to be called if mcrypt is being used. * @access public
* */
* @access public function disableContinuousBuffer()
*/ {
function __destruct() if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_INTERNAL ) {
{ $this->encryptIndex = $this->decryptIndex = array(0, 0);
if ( CRYPT_RC4_MODE == CRYPT_RC4_MODE_MCRYPT ) { $this->encryptStream = $this->decryptStream = false;
$this->_closeMCrypt(); }
}
} $this->continuousBuffer = false;
}
/**
* Properly close the MCrypt objects. /**
* * Dummy function.
* @access prviate *
*/ * Since RC4 is a stream cipher and not a block cipher, no padding is necessary. The only reason this function is
function _closeMCrypt() * included is so that you can switch between a block cipher and a stream cipher transparently.
{ *
if ( $this->encryptStream !== false ) { * @see Crypt_RC4::disablePadding()
if ( $this->continuousBuffer ) { * @access public
mcrypt_generic_deinit($this->encryptStream); */
} function enablePadding()
{
mcrypt_module_close($this->encryptStream); }
$this->encryptStream = false; /**
} * Dummy function.
*
if ( $this->decryptStream !== false ) { * @see Crypt_RC4::enablePadding()
if ( $this->continuousBuffer ) { * @access public
mcrypt_generic_deinit($this->decryptStream); */
} function disablePadding()
{
mcrypt_module_close($this->decryptStream); }
}
$this->decryptStream = false;
} // vim: ts=4:sw=4:et:
} // vim6: fdl=1:
}

4801
plugins/OStatus/extlib/Crypt/RSA.php
View File

File diff suppressed because it is too large Load Diff

374
plugins/OStatus/extlib/Crypt/Random.php
View File

@ -1,125 +1,249 @@
<?php <?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/** /**
* Random Number Generator * Random Number Generator
* *
* PHP versions 4 and 5 * PHP versions 4 and 5
* *
* Here's a short example of how to use this library: * Here's a short example of how to use this library:
* <code> * <code>
* <?php * <?php
* include('Crypt/Random.php'); * include('Crypt/Random.php');
* *
* echo crypt_random(); * echo bin2hex(crypt_random_string(8));
* ?> * ?>
* </code> * </code>
* *
* LICENSE: This library is free software; you can redistribute it and/or * LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy
* modify it under the terms of the GNU Lesser General Public * of this software and associated documentation files (the "Software"), to deal
* License as published by the Free Software Foundation; either * in the Software without restriction, including without limitation the rights
* version 2.1 of the License, or (at your option) any later version. * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* * copies of the Software, and to permit persons to whom the Software is
* This library is distributed in the hope that it will be useful, * furnished to do so, subject to the following conditions:
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * The above copyright notice and this permission notice shall be included in
* Lesser General Public License for more details. * all copies or substantial portions of the Software.
* *
* You should have received a copy of the GNU Lesser General Public * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* License along with this library; if not, write to the Free Software * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* MA 02111-1307 USA * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* @category Crypt * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* @package Crypt_Random * THE SOFTWARE.
* @author Jim Wigginton <terrafrost@php.net> *
* @copyright MMVII Jim Wigginton * @category Crypt
* @license http://www.gnu.org/licenses/lgpl.txt * @package Crypt_Random
* @version $Id: Random.php,v 1.6 2010/02/28 05:28:38 terrafrost Exp $ * @author Jim Wigginton <terrafrost@php.net>
* @link http://phpseclib.sourceforge.net * @copyright MMVII Jim Wigginton
*/ * @license http://www.opensource.org/licenses/mit-license.html MIT License
* @link http://phpseclib.sourceforge.net
/** */
* Generate a random value.
* /**
* On 32-bit machines, the largest distance that can exist between $min and $max is 2**31. * "Is Windows" test
* If $min and $max are farther apart than that then the last ($max - range) numbers. *
* * @access private
* Depending on how this is being used, it may be worth while to write a replacement. For example, */
* a PHP-based web app that stores its data in an SQL database can collect more entropy than this function define('CRYPT_RANDOM_IS_WINDOWS', strtoupper(substr(PHP_OS, 0, 3)) === 'WIN');
* can.
* /**
* @param optional Integer $min * Generate a random string.
* @param optional Integer $max *
* @return Integer * Although microoptimizations are generally discouraged as they impair readability this function is ripe with
* @access public * microoptimizations because this function has the potential of being called a huge number of times.
*/ * eg. for RSA key generation.
function crypt_random($min = 0, $max = 0x7FFFFFFF) *
{ * @param Integer $length
if ($min == $max) { * @return String
return $min; * @access public
} */
function crypt_random_string($length)
// see http://en.wikipedia.org/wiki//dev/random {
if (file_exists('/dev/urandom')) { if (CRYPT_RANDOM_IS_WINDOWS) {
$fp = fopen('/dev/urandom', 'rb'); // method 1. prior to PHP 5.3 this would call rand() on windows hence the function_exists('class_alias') call.
extract(unpack('Nrandom', fread($fp, 4))); // ie. class_alias is a function that was introduced in PHP 5.3
fclose($fp); if (function_exists('mcrypt_create_iv') && function_exists('class_alias')) {
return mcrypt_create_iv($length);
// say $min = 0 and $max = 3. if we didn't do abs() then we could have stuff like this: }
// -4 % 3 + 0 = -1, even though -1 < $min // method 2. openssl_random_pseudo_bytes was introduced in PHP 5.3.0 but prior to PHP 5.3.4 there was,
return abs($random) % ($max - $min) + $min; // to quote <http://php.net/ChangeLog-5.php#5.3.4>, "possible blocking behavior". as of 5.3.4
} // openssl_random_pseudo_bytes and mcrypt_create_iv do the exact same thing on Windows. ie. they both
// call php_win32_get_random_bytes():
/* Prior to PHP 4.2.0, mt_srand() had to be called before mt_rand() could be called. //
Prior to PHP 5.2.6, mt_rand()'s automatic seeding was subpar, as elaborated here: // https://github.com/php/php-src/blob/7014a0eb6d1611151a286c0ff4f2238f92c120d6/ext/openssl/openssl.c#L5008
// https://github.com/php/php-src/blob/7014a0eb6d1611151a286c0ff4f2238f92c120d6/ext/mcrypt/mcrypt.c#L1392
http://www.suspekt.org/2008/08/17/mt_srand-and-not-so-random-numbers/ //
// php_win32_get_random_bytes() is defined thusly:
The seeding routine is pretty much ripped from PHP's own internal GENERATE_SEED() macro: //
// https://github.com/php/php-src/blob/7014a0eb6d1611151a286c0ff4f2238f92c120d6/win32/winutil.c#L80
http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3_2/ext/standard/php_rand.h?view=markup */ //
if (version_compare(PHP_VERSION, '5.2.5', '<=')) { // we're calling it, all the same, in the off chance that the mcrypt extension is not available
static $seeded; if (function_exists('openssl_random_pseudo_bytes') && version_compare(PHP_VERSION, '5.3.4', '>=')) {
if (!isset($seeded)) { return openssl_random_pseudo_bytes($length);
$seeded = true; }
mt_srand(fmod(time() * getmypid(), 0x7FFFFFFF) ^ fmod(1000000 * lcg_value(), 0x7FFFFFFF)); } else {
} // method 1. the fastest
} if (function_exists('openssl_random_pseudo_bytes')) {
return openssl_random_pseudo_bytes($length);
static $crypto; }
// method 2
// The CSPRNG's Yarrow and Fortuna periodically reseed. This function can be reseeded by hitting F5 static $fp = true;
// in the browser and reloading the page. if ($fp === true) {
// warning's will be output unles the error suppression operator is used. errors such as
if (!isset($crypto)) { // "open_basedir restriction in effect", "Permission denied", "No such file or directory", etc.
$key = $iv = ''; $fp = @fopen('/dev/urandom', 'rb');
for ($i = 0; $i < 8; $i++) { }
$key.= pack('n', mt_rand(0, 0xFFFF)); if ($fp !== true && $fp !== false) { // surprisingly faster than !is_bool() or is_resource()
$iv .= pack('n', mt_rand(0, 0xFFFF)); return fread($fp, $length);
} }
switch (true) { // method 3. pretty much does the same thing as method 2 per the following url:
case class_exists('Crypt_AES'): // https://github.com/php/php-src/blob/7014a0eb6d1611151a286c0ff4f2238f92c120d6/ext/mcrypt/mcrypt.c#L1391
$crypto = new Crypt_AES(CRYPT_AES_MODE_CTR); // surprisingly slower than method 2. maybe that's because mcrypt_create_iv does a bunch of error checking that we're
break; // not doing. regardless, this'll only be called if this PHP script couldn't open /dev/urandom due to open_basedir
case class_exists('Crypt_TripleDES'): // restrictions or some such
$crypto = new Crypt_TripleDES(CRYPT_DES_MODE_CTR); if (function_exists('mcrypt_create_iv')) {
break; return mcrypt_create_iv($length, MCRYPT_DEV_URANDOM);
case class_exists('Crypt_DES'): }
$crypto = new Crypt_DES(CRYPT_DES_MODE_CTR); }
break; // at this point we have no choice but to use a pure-PHP CSPRNG
case class_exists('Crypt_RC4'):
$crypto = new Crypt_RC4(); // cascade entropy across multiple PHP instances by fixing the session and collecting all
break; // environmental variables, including the previous session data and the current session
default: // data.
extract(unpack('Nrandom', pack('H*', sha1(mt_rand(0, 0x7FFFFFFF))))); //
return abs($random) % ($max - $min) + $min; // mt_rand seeds itself by looking at the PID and the time, both of which are (relatively)
} // easy to guess at. linux uses mouse clicks, keyboard timings, etc, as entropy sources, but
$crypto->setKey($key); // PHP isn't low level to be able to use those as sources and on a web server there's not likely
$crypto->setIV($iv); // going to be a ton of keyboard or mouse action. web servers do have one thing that we can use
} // however. a ton of people visiting the website. obviously you don't want to base your seeding
// soley on parameters a potential attacker sends but (1) not everything in $_SERVER is controlled
extract(unpack('Nrandom', $crypto->encrypt("\0\0\0\0"))); // by the user and (2) this isn't just looking at the data sent by the current user - it's based
return abs($random) % ($max - $min) + $min; // on the data sent by all users. one user requests the page and a hash of their info is saved.
} // another user visits the page and the serialization of their data is utilized along with the
?> // server envirnment stuff and a hash of the previous http request data (which itself utilizes
// a hash of the session data before that). certainly an attacker should be assumed to have
// full control over his own http requests. he, however, is not going to have control over
// everyone's http requests.
static $crypto = false, $v;
if ($crypto === false) {
// save old session data
$old_session_id = session_id();
$old_use_cookies = ini_get('session.use_cookies');
$old_session_cache_limiter = session_cache_limiter();
if (isset($_SESSION)) {
$_OLD_SESSION = $_SESSION;
}
if ($old_session_id != '') {
session_write_close();
}
session_id(1);
ini_set('session.use_cookies', 0);
session_cache_limiter('');
session_start();
$v = $seed = $_SESSION['seed'] = pack('H*', sha1(
serialize($_SERVER) .
serialize($_POST) .
serialize($_GET) .
serialize($_COOKIE) .
serialize($GLOBALS) .
serialize($_SESSION) .
serialize($_OLD_SESSION)
));
if (!isset($_SESSION['count'])) {
$_SESSION['count'] = 0;
}
$_SESSION['count']++;
session_write_close();
// restore old session data
if ($old_session_id != '') {
session_id($old_session_id);
session_start();
ini_set('session.use_cookies', $old_use_cookies);
session_cache_limiter($old_session_cache_limiter);
} else {
if (isset($_OLD_SESSION)) {
$_SESSION = $_OLD_SESSION;
unset($_OLD_SESSION);
} else {
unset($_SESSION);
}
}
// in SSH2 a shared secret and an exchange hash are generated through the key exchange process.
// the IV client to server is the hash of that "nonce" with the letter A and for the encryption key it's the letter C.
// if the hash doesn't produce enough a key or an IV that's long enough concat successive hashes of the
// original hash and the current hash. we'll be emulating that. for more info see the following URL:
//
// http://tools.ietf.org/html/rfc4253#section-7.2
//
// see the is_string($crypto) part for an example of how to expand the keys
$key = pack('H*', sha1($seed . 'A'));
$iv = pack('H*', sha1($seed . 'C'));
// ciphers are used as per the nist.gov link below. also, see this link:
//
// http://en.wikipedia.org/wiki/Cryptographically_secure_pseudorandom_number_generator#Designs_based_on_cryptographic_primitives
switch (true) {
case class_exists('Crypt_AES'):
$crypto = new Crypt_AES(CRYPT_AES_MODE_CTR);
break;
case class_exists('Crypt_TripleDES'):
$crypto = new Crypt_TripleDES(CRYPT_DES_MODE_CTR);
break;
case class_exists('Crypt_DES'):
$crypto = new Crypt_DES(CRYPT_DES_MODE_CTR);
break;
case class_exists('Crypt_RC4'):
$crypto = new Crypt_RC4();
break;
default:
$crypto = $seed;
return crypt_random_string($length);
}
$crypto->setKey($key);
$crypto->setIV($iv);
$crypto->enableContinuousBuffer();
}
if (is_string($crypto)) {
// the following is based off of ANSI X9.31:
//
// http://csrc.nist.gov/groups/STM/cavp/documents/rng/931rngext.pdf
//
// OpenSSL uses that same standard for it's random numbers:
//
// http://www.opensource.apple.com/source/OpenSSL/OpenSSL-38/openssl/fips-1.0/rand/fips_rand.c
// (do a search for "ANS X9.31 A.2.4")
//
// ANSI X9.31 recommends ciphers be used and phpseclib does use them if they're available (see
// later on in the code) but if they're not we'll use sha1
$result = '';
while (strlen($result) < $length) { // each loop adds 20 bytes
// microtime() isn't packed as "densely" as it could be but then neither is that the idea.
// the idea is simply to ensure that each "block" has a unique element to it.
$i = pack('H*', sha1(microtime()));
$r = pack('H*', sha1($i ^ $v));
$v = pack('H*', sha1($r ^ $i));
$result.= $r;
}
return substr($result, 0, $length);
}
//return $crypto->encrypt(str_repeat("\0", $length));
$result = '';
while (strlen($result) < $length) {
$i = $crypto->encrypt(microtime());
$r = $crypto->encrypt($i ^ $v);
$v = $crypto->encrypt($r ^ $i);
$result.= $r;
}
return substr($result, 0, $length);
}

3304
plugins/OStatus/extlib/Crypt/Rijndael.php
View File

File diff suppressed because it is too large Load Diff

1532
plugins/OStatus/extlib/Crypt/TripleDES.php
View File

File diff suppressed because it is too large Load Diff

1664
plugins/OStatus/extlib/Crypt/Twofish.php Normal file
View File

File diff suppressed because it is too large Load Diff

7195
plugins/OStatus/extlib/Math/BigInteger.php
View File

File diff suppressed because it is too large Load Diff