Modified: vcl/trunk/web/.ht-inc/phpseclib/Crypt/Rijndael.php URL: http://svn.apache.org/viewvc/vcl/trunk/web/.ht-inc/phpseclib/Crypt/Rijndael.php?rev=1796097&r1=1796096&r2=1796097&view=diff ============================================================================== --- vcl/trunk/web/.ht-inc/phpseclib/Crypt/Rijndael.php (original) +++ vcl/trunk/web/.ht-inc/phpseclib/Crypt/Rijndael.php Wed May 24 20:28:10 2017 @@ -1,1424 +1,1050 @@ -<?php -/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ - -/** - * Pure-PHP implementation of Rijndael. - * - * Does not use mcrypt, even when available, for reasons that are explained below. - * - * PHP versions 4 and 5 - * - * If {@link Crypt_Rijndael::setBlockLength() setBlockLength()} isn't called, it'll be assumed to be 128 bits. If - * {@link Crypt_Rijndael::setKeyLength() setKeyLength()} isn't called, it'll be calculated from - * {@link Crypt_Rijndael::setKey() setKey()}. ie. if the key is 128-bits, the key length will be 128-bits. If it's - * 136-bits it'll be null-padded to 160-bits and 160 bits will be the key length until - * {@link Crypt_Rijndael::setKey() setKey()} is called, again, at which point, it'll be recalculated. - * - * Not all Rijndael implementations may support 160-bits or 224-bits as the block length / key length. mcrypt, for example, - * does not. AES, itself, only supports block lengths of 128 and key lengths of 128, 192, and 256. - * {@link http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=10 Rijndael-ammended.pdf#page=10} defines the - * algorithm for block lengths of 192 and 256 but not for block lengths / key lengths of 160 and 224. Indeed, 160 and 224 - * are first defined as valid key / block lengths in - * {@link http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=44 Rijndael-ammended.pdf#page=44}: - * Extensions: Other block and Cipher Key lengths. - * - * {@internal The variable names are the same as those in - * {@link http://www.csrc.nist.gov/publications/fips/fips197/fips-197.pdf#page=10 fips-197.pdf#page=10}.}} - * - * Here's a short example of how to use this library: - * <code> - * <?php - * include('Crypt/Rijndael.php'); - * - * $rijndael = new Crypt_Rijndael(); - * - * $rijndael->setKey('abcdefghijklmnop'); - * - * $size = 10 * 1024; - * $plaintext = ''; - * for ($i = 0; $i < $size; $i++) { - * $plaintext.= 'a'; - * } - * - * echo $rijndael->decrypt($rijndael->encrypt($plaintext)); - * ?> - * </code> - * - * LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - * - * @category Crypt - * @package Crypt_Rijndael - * @author Jim Wigginton <[email protected]> - * @copyright MMVIII Jim Wigginton - * @license http://www.opensource.org/licenses/mit-license.html MIT License - * @version $Id: Rijndael.php,v 1.12 2010/02/09 06:10:26 terrafrost Exp $ - * @link http://phpseclib.sourceforge.net - */ - -/**#@+ - * @access public - * @see Crypt_Rijndael::encrypt() - * @see Crypt_Rijndael::decrypt() - */ -/** - * Encrypt / decrypt using the Counter mode. - * - * Set to -1 since that's what Crypt/Random.php uses to index the CTR mode. - * - * @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Counter_.28CTR.29 - */ -define('CRYPT_RIJNDAEL_MODE_CTR', -1); -/** - * Encrypt / decrypt using the Electronic Code Book mode. - * - * @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Electronic_codebook_.28ECB.29 - */ -define('CRYPT_RIJNDAEL_MODE_ECB', 1); -/** - * Encrypt / decrypt using the Code Book Chaining mode. - * - * @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher-block_chaining_.28CBC.29 - */ -define('CRYPT_RIJNDAEL_MODE_CBC', 2); -/** - * Encrypt / decrypt using the Cipher Feedback mode. - * - * @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher_feedback_.28CFB.29 - */ -define('CRYPT_RIJNDAEL_MODE_CFB', 3); -/** - * Encrypt / decrypt using the Cipher Feedback mode. - * - * @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Output_feedback_.28OFB.29 - */ -define('CRYPT_RIJNDAEL_MODE_OFB', 4); -/**#@-*/ - -/**#@+ - * @access private - * @see Crypt_Rijndael::Crypt_Rijndael() - */ -/** - * Toggles the internal implementation - */ -define('CRYPT_RIJNDAEL_MODE_INTERNAL', 1); -/** - * Toggles the mcrypt implementation - */ -define('CRYPT_RIJNDAEL_MODE_MCRYPT', 2); -/**#@-*/ - -/** - * Pure-PHP implementation of Rijndael. - * - * @author Jim Wigginton <[email protected]> - * @version 0.1.0 - * @access public - * @package Crypt_Rijndael - */ -class Crypt_Rijndael { - /** - * The Encryption Mode - * - * @see Crypt_Rijndael::Crypt_Rijndael() - * @var Integer - * @access private - */ - var $mode; - - /** - * The Key - * - * @see Crypt_Rijndael::setKey() - * @var String - * @access private - */ - var $key = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"; - - /** - * The Initialization Vector - * - * @see Crypt_Rijndael::setIV() - * @var String - * @access private - */ - var $iv = ''; - - /** - * A "sliding" Initialization Vector - * - * @see Crypt_Rijndael::enableContinuousBuffer() - * @var String - * @access private - */ - var $encryptIV = ''; - - /** - * A "sliding" Initialization Vector - * - * @see Crypt_Rijndael::enableContinuousBuffer() - * @var String - * @access private - */ - var $decryptIV = ''; - - /** - * Continuous Buffer status - * - * @see Crypt_Rijndael::enableContinuousBuffer() - * @var Boolean - * @access private - */ - var $continuousBuffer = false; - - /** - * Padding status - * - * @see Crypt_Rijndael::enablePadding() - * @var Boolean - * @access private - */ - var $padding = true; - - /** - * Does the key schedule need to be (re)calculated? - * - * @see setKey() - * @see setBlockLength() - * @see setKeyLength() - * @var Boolean - * @access private - */ - var $changed = true; - - /** - * Has the key length explicitly been set or should it be derived from the key, itself? - * - * @see setKeyLength() - * @var Boolean - * @access private - */ - var $explicit_key_length = false; - - /** - * The Key Schedule - * - * @see _setup() - * @var Array - * @access private - */ - var $w; - - /** - * The Inverse Key Schedule - * - * @see _setup() - * @var Array - * @access private - */ - var $dw; - - /** - * The Block Length - * - * @see setBlockLength() - * @var Integer - * @access private - * @internal The max value is 32, the min value is 16. All valid values are multiples of 4. Exists in conjunction with - * $Nb because we need this value and not $Nb to pad strings appropriately. - */ - var $block_size = 16; - - /** - * The Block Length divided by 32 - * - * @see setBlockLength() - * @var Integer - * @access private - * @internal The max value is 256 / 32 = 8, the min value is 128 / 32 = 4. Exists in conjunction with $block_size - * because the encryption / decryption / key schedule creation requires this number and not $block_size. We could - * derive this from $block_size or vice versa, but that'd mean we'd have to do multiple shift operations, so in lieu - * of that, we'll just precompute it once. - * - */ - var $Nb = 4; - - /** - * The Key Length - * - * @see setKeyLength() - * @var Integer - * @access private - * @internal The max value is 256 / 8 = 32, the min value is 128 / 8 = 16. Exists in conjunction with $key_size - * because the encryption / decryption / key schedule creation requires this number and not $key_size. We could - * derive this from $key_size or vice versa, but that'd mean we'd have to do multiple shift operations, so in lieu - * of that, we'll just precompute it once. - */ - var $key_size = 16; - - /** - * The Key Length divided by 32 - * - * @see setKeyLength() - * @var Integer - * @access private - * @internal The max value is 256 / 32 = 8, the min value is 128 / 32 = 4 - */ - var $Nk = 4; - - /** - * The Number of Rounds - * - * @var Integer - * @access private - * @internal The max value is 14, the min value is 10. - */ - var $Nr; - - /** - * Shift offsets - * - * @var Array - * @access private - */ - var $c; - - /** - * Precomputed mixColumns table - * - * @see Crypt_Rijndael() - * @var Array - * @access private - */ - var $t0; - - /** - * Precomputed mixColumns table - * - * @see Crypt_Rijndael() - * @var Array - * @access private - */ - var $t1; - - /** - * Precomputed mixColumns table - * - * @see Crypt_Rijndael() - * @var Array - * @access private - */ - var $t2; - - /** - * Precomputed mixColumns table - * - * @see Crypt_Rijndael() - * @var Array - * @access private - */ - var $t3; - - /** - * Precomputed invMixColumns table - * - * @see Crypt_Rijndael() - * @var Array - * @access private - */ - var $dt0; - - /** - * Precomputed invMixColumns table - * - * @see Crypt_Rijndael() - * @var Array - * @access private - */ - var $dt1; - - /** - * Precomputed invMixColumns table - * - * @see Crypt_Rijndael() - * @var Array - * @access private - */ - var $dt2; - - /** - * Precomputed invMixColumns table - * - * @see Crypt_Rijndael() - * @var Array - * @access private - */ - var $dt3; - - /** - * Is the mode one that is paddable? - * - * @see Crypt_Rijndael::Crypt_Rijndael() - * @var Boolean - * @access private - */ - var $paddable = false; - - /** - * Encryption buffer for CTR, OFB and CFB modes - * - * @see Crypt_Rijndael::encrypt() - * @var String - * @access private - */ - var $enbuffer = array('encrypted' => '', 'xor' => ''); - - /** - * Decryption buffer for CTR, OFB and CFB modes - * - * @see Crypt_Rijndael::decrypt() - * @var String - * @access private - */ - var $debuffer = array('ciphertext' => ''); - - /** - * Default Constructor. - * - * Determines whether or not the mcrypt extension should be used. $mode should only, at present, be - * CRYPT_RIJNDAEL_MODE_ECB or CRYPT_RIJNDAEL_MODE_CBC. If not explictly set, CRYPT_RIJNDAEL_MODE_CBC will be used. - * - * @param optional Integer $mode - * @return Crypt_Rijndael - * @access public - */ - function Crypt_Rijndael($mode = CRYPT_RIJNDAEL_MODE_CBC) - { - switch ($mode) { - case CRYPT_RIJNDAEL_MODE_ECB: - case CRYPT_RIJNDAEL_MODE_CBC: - $this->paddable = true; - $this->mode = $mode; - break; - case CRYPT_RIJNDAEL_MODE_CTR: - case CRYPT_RIJNDAEL_MODE_CFB: - case CRYPT_RIJNDAEL_MODE_OFB: - $this->mode = $mode; - break; - default: - $this->paddable = true; - $this->mode = CRYPT_RIJNDAEL_MODE_CBC; - } - - $t3 = &$this->t3; - $t2 = &$this->t2; - $t1 = &$this->t1; - $t0 = &$this->t0; - - $dt3 = &$this->dt3; - $dt2 = &$this->dt2; - $dt1 = &$this->dt1; - $dt0 = &$this->dt0; - - // according to <http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=19> (section 5.2.1), - // precomputed tables can be used in the mixColumns phase. in that example, they're assigned t0...t3, so - // those are the names we'll use. - $t3 = array( - 0x6363A5C6, 0x7C7C84F8, 0x777799EE, 0x7B7B8DF6, 0xF2F20DFF, 0x6B6BBDD6, 0x6F6FB1DE, 0xC5C55491, - 0x30305060, 0x01010302, 0x6767A9CE, 0x2B2B7D56, 0xFEFE19E7, 0xD7D762B5, 0xABABE64D, 0x76769AEC, - 0xCACA458F, 0x82829D1F, 0xC9C94089, 0x7D7D87FA, 0xFAFA15EF, 0x5959EBB2, 0x4747C98E, 0xF0F00BFB, - 0xADADEC41, 0xD4D467B3, 0xA2A2FD5F, 0xAFAFEA45, 0x9C9CBF23, 0xA4A4F753, 0x727296E4, 0xC0C05B9B, - 0xB7B7C275, 0xFDFD1CE1, 0x9393AE3D, 0x26266A4C, 0x36365A6C, 0x3F3F417E, 0xF7F702F5, 0xCCCC4F83, - 0x34345C68, 0xA5A5F451, 0xE5E534D1, 0xF1F108F9, 0x717193E2, 0xD8D873AB, 0x31315362, 0x15153F2A, - 0x04040C08, 0xC7C75295, 0x23236546, 0xC3C35E9D, 0x18182830, 0x9696A137, 0x05050F0A, 0x9A9AB52F, - 0x0707090E, 0x12123624, 0x80809B1B, 0xE2E23DDF, 0xEBEB26CD, 0x2727694E, 0xB2B2CD7F, 0x75759FEA, - 0x09091B12, 0x83839E1D, 0x2C2C7458, 0x1A1A2E34, 0x1B1B2D36, 0x6E6EB2DC, 0x5A5AEEB4, 0xA0A0FB5B, - 0x5252F6A4, 0x3B3B4D76, 0xD6D661B7, 0xB3B3CE7D, 0x29297B52, 0xE3E33EDD, 0x2F2F715E, 0x84849713, - 0x5353F5A6, 0xD1D168B9, 0x00000000, 0xEDED2CC1, 0x20206040, 0xFCFC1FE3, 0xB1B1C879, 0x5B5BEDB6, - 0x6A6ABED4, 0xCBCB468D, 0xBEBED967, 0x39394B72, 0x4A4ADE94, 0x4C4CD498, 0x5858E8B0, 0xCFCF4A85, - 0xD0D06BBB, 0xEFEF2AC5, 0xAAAAE54F, 0xFBFB16ED, 0x4343C586, 0x4D4DD79A, 0x33335566, 0x85859411, - 0x4545CF8A, 0xF9F910E9, 0x02020604, 0x7F7F81FE, 0x5050F0A0, 0x3C3C4478, 0x9F9FBA25, 0xA8A8E34B, - 0x5151F3A2, 0xA3A3FE5D, 0x4040C080, 0x8F8F8A05, 0x9292AD3F, 0x9D9DBC21, 0x38384870, 0xF5F504F1, - 0xBCBCDF63, 0xB6B6C177, 0xDADA75AF, 0x21216342, 0x10103020, 0xFFFF1AE5, 0xF3F30EFD, 0xD2D26DBF, - 0xCDCD4C81, 0x0C0C1418, 0x13133526, 0xECEC2FC3, 0x5F5FE1BE, 0x9797A235, 0x4444CC88, 0x1717392E, - 0xC4C45793, 0xA7A7F255, 0x7E7E82FC, 0x3D3D477A, 0x6464ACC8, 0x5D5DE7BA, 0x19192B32, 0x737395E6, - 0x6060A0C0, 0x81819819, 0x4F4FD19E, 0xDCDC7FA3, 0x22226644, 0x2A2A7E54, 0x9090AB3B, 0x8888830B, - 0x4646CA8C, 0xEEEE29C7, 0xB8B8D36B, 0x14143C28, 0xDEDE79A7, 0x5E5EE2BC, 0x0B0B1D16, 0xDBDB76AD, - 0xE0E03BDB, 0x32325664, 0x3A3A4E74, 0x0A0A1E14, 0x4949DB92, 0x06060A0C, 0x24246C48, 0x5C5CE4B8, - 0xC2C25D9F, 0xD3D36EBD, 0xACACEF43, 0x6262A6C4, 0x9191A839, 0x9595A431, 0xE4E437D3, 0x79798BF2, - 0xE7E732D5, 0xC8C8438B, 0x3737596E, 0x6D6DB7DA, 0x8D8D8C01, 0xD5D564B1, 0x4E4ED29C, 0xA9A9E049, - 0x6C6CB4D8, 0x5656FAAC, 0xF4F407F3, 0xEAEA25CF, 0x6565AFCA, 0x7A7A8EF4, 0xAEAEE947, 0x08081810, - 0xBABAD56F, 0x787888F0, 0x25256F4A, 0x2E2E725C, 0x1C1C2438, 0xA6A6F157, 0xB4B4C773, 0xC6C65197, - 0xE8E823CB, 0xDDDD7CA1, 0x74749CE8, 0x1F1F213E, 0x4B4BDD96, 0xBDBDDC61, 0x8B8B860D, 0x8A8A850F, - 0x707090E0, 0x3E3E427C, 0xB5B5C471, 0x6666AACC, 0x4848D890, 0x03030506, 0xF6F601F7, 0x0E0E121C, - 0x6161A3C2, 0x35355F6A, 0x5757F9AE, 0xB9B9D069, 0x86869117, 0xC1C15899, 0x1D1D273A, 0x9E9EB927, - 0xE1E138D9, 0xF8F813EB, 0x9898B32B, 0x11113322, 0x6969BBD2, 0xD9D970A9, 0x8E8E8907, 0x9494A733, - 0x9B9BB62D, 0x1E1E223C, 0x87879215, 0xE9E920C9, 0xCECE4987, 0x5555FFAA, 0x28287850, 0xDFDF7AA5, - 0x8C8C8F03, 0xA1A1F859, 0x89898009, 0x0D0D171A, 0xBFBFDA65, 0xE6E631D7, 0x4242C684, 0x6868B8D0, - 0x4141C382, 0x9999B029, 0x2D2D775A, 0x0F0F111E, 0xB0B0CB7B, 0x5454FCA8, 0xBBBBD66D, 0x16163A2C - ); - - $dt3 = array( - 0xF4A75051, 0x4165537E, 0x17A4C31A, 0x275E963A, 0xAB6BCB3B, 0x9D45F11F, 0xFA58ABAC, 0xE303934B, - 0x30FA5520, 0x766DF6AD, 0xCC769188, 0x024C25F5, 0xE5D7FC4F, 0x2ACBD7C5, 0x35448026, 0x62A38FB5, - 0xB15A49DE, 0xBA1B6725, 0xEA0E9845, 0xFEC0E15D, 0x2F7502C3, 0x4CF01281, 0x4697A38D, 0xD3F9C66B, - 0x8F5FE703, 0x929C9515, 0x6D7AEBBF, 0x5259DA95, 0xBE832DD4, 0x7421D358, 0xE0692949, 0xC9C8448E, - 0xC2896A75, 0x8E7978F4, 0x583E6B99, 0xB971DD27, 0xE14FB6BE, 0x88AD17F0, 0x20AC66C9, 0xCE3AB47D, - 0xDF4A1863, 0x1A3182E5, 0x51336097, 0x537F4562, 0x6477E0B1, 0x6BAE84BB, 0x81A01CFE, 0x082B94F9, - 0x48685870, 0x45FD198F, 0xDE6C8794, 0x7BF8B752, 0x73D323AB, 0x4B02E272, 0x1F8F57E3, 0x55AB2A66, - 0xEB2807B2, 0xB5C2032F, 0xC57B9A86, 0x3708A5D3, 0x2887F230, 0xBFA5B223, 0x036ABA02, 0x16825CED, - 0xCF1C2B8A, 0x79B492A7, 0x07F2F0F3, 0x69E2A14E, 0xDAF4CD65, 0x05BED506, 0x34621FD1, 0xA6FE8AC4, - 0x2E539D34, 0xF355A0A2, 0x8AE13205, 0xF6EB75A4, 0x83EC390B, 0x60EFAA40, 0x719F065E, 0x6E1051BD, - 0x218AF93E, 0xDD063D96, 0x3E05AEDD, 0xE6BD464D, 0x548DB591, 0xC45D0571, 0x06D46F04, 0x5015FF60, - 0x98FB2419, 0xBDE997D6, 0x4043CC89, 0xD99E7767, 0xE842BDB0, 0x898B8807, 0x195B38E7, 0xC8EEDB79, - 0x7C0A47A1, 0x420FE97C, 0x841EC9F8, 0x00000000, 0x80868309, 0x2BED4832, 0x1170AC1E, 0x5A724E6C, - 0x0EFFFBFD, 0x8538560F, 0xAED51E3D, 0x2D392736, 0x0FD9640A, 0x5CA62168, 0x5B54D19B, 0x362E3A24, - 0x0A67B10C, 0x57E70F93, 0xEE96D2B4, 0x9B919E1B, 0xC0C54F80, 0xDC20A261, 0x774B695A, 0x121A161C, - 0x93BA0AE2, 0xA02AE5C0, 0x22E0433C, 0x1B171D12, 0x090D0B0E, 0x8BC7ADF2, 0xB6A8B92D, 0x1EA9C814, - 0xF1198557, 0x75074CAF, 0x99DDBBEE, 0x7F60FDA3, 0x01269FF7, 0x72F5BC5C, 0x663BC544, 0xFB7E345B, - 0x4329768B, 0x23C6DCCB, 0xEDFC68B6, 0xE4F163B8, 0x31DCCAD7, 0x63851042, 0x97224013, 0xC6112084, - 0x4A247D85, 0xBB3DF8D2, 0xF93211AE, 0x29A16DC7, 0x9E2F4B1D, 0xB230F3DC, 0x8652EC0D, 0xC1E3D077, - 0xB3166C2B, 0x70B999A9, 0x9448FA11, 0xE9642247, 0xFC8CC4A8, 0xF03F1AA0, 0x7D2CD856, 0x3390EF22, - 0x494EC787, 0x38D1C1D9, 0xCAA2FE8C, 0xD40B3698, 0xF581CFA6, 0x7ADE28A5, 0xB78E26DA, 0xADBFA43F, - 0x3A9DE42C, 0x78920D50, 0x5FCC9B6A, 0x7E466254, 0x8D13C2F6, 0xD8B8E890, 0x39F75E2E, 0xC3AFF582, - 0x5D80BE9F, 0xD0937C69, 0xD52DA96F, 0x2512B3CF, 0xAC993BC8, 0x187DA710, 0x9C636EE8, 0x3BBB7BDB, - 0x267809CD, 0x5918F46E, 0x9AB701EC, 0x4F9AA883, 0x956E65E6, 0xFFE67EAA, 0xBCCF0821, 0x15E8E6EF, - 0xE79BD9BA, 0x6F36CE4A, 0x9F09D4EA, 0xB07CD629, 0xA4B2AF31, 0x3F23312A, 0xA59430C6, 0xA266C035, - 0x4EBC3774, 0x82CAA6FC, 0x90D0B0E0, 0xA7D81533, 0x04984AF1, 0xECDAF741, 0xCD500E7F, 0x91F62F17, - 0x4DD68D76, 0xEFB04D43, 0xAA4D54CC, 0x9604DFE4, 0xD1B5E39E, 0x6A881B4C, 0x2C1FB8C1, 0x65517F46, - 0x5EEA049D, 0x8C355D01, 0x877473FA, 0x0B412EFB, 0x671D5AB3, 0xDBD25292, 0x105633E9, 0xD647136D, - 0xD7618C9A, 0xA10C7A37, 0xF8148E59, 0x133C89EB, 0xA927EECE, 0x61C935B7, 0x1CE5EDE1, 0x47B13C7A, - 0xD2DF599C, 0xF2733F55, 0x14CE7918, 0xC737BF73, 0xF7CDEA53, 0xFDAA5B5F, 0x3D6F14DF, 0x44DB8678, - 0xAFF381CA, 0x68C43EB9, 0x24342C38, 0xA3405FC2, 0x1DC37216, 0xE2250CBC, 0x3C498B28, 0x0D9541FF, - 0xA8017139, 0x0CB3DE08, 0xB4E49CD8, 0x56C19064, 0xCB84617B, 0x32B670D5, 0x6C5C7448, 0xB85742D0 - ); - - for ($i = 0; $i < 256; $i++) { - $t2[$i << 8] = (($t3[$i] << 8) & 0xFFFFFF00) | (($t3[$i] >> 24) & 0x000000FF); - $t1[$i << 16] = (($t3[$i] << 16) & 0xFFFF0000) | (($t3[$i] >> 16) & 0x0000FFFF); - $t0[$i << 24] = (($t3[$i] << 24) & 0xFF000000) | (($t3[$i] >> 8) & 0x00FFFFFF); - - $dt2[$i << 8] = (($this->dt3[$i] << 8) & 0xFFFFFF00) | (($dt3[$i] >> 24) & 0x000000FF); - $dt1[$i << 16] = (($this->dt3[$i] << 16) & 0xFFFF0000) | (($dt3[$i] >> 16) & 0x0000FFFF); - $dt0[$i << 24] = (($this->dt3[$i] << 24) & 0xFF000000) | (($dt3[$i] >> 8) & 0x00FFFFFF); - } - } - - /** - * Sets the key. - * - * Keys can be of any length. Rijndael, itself, requires the use of a key that's between 128-bits and 256-bits long and - * whose length is a multiple of 32. If the key is less than 256-bits and the key length isn't set, we round the length - * up to the closest valid key length, padding $key with null bytes. If the key is more than 256-bits, we trim the - * excess bits. - * - * If the key is not explicitly set, it'll be assumed to be all null bytes. - * - * @access public - * @param String $key - */ - function setKey($key) - { - $this->key = $key; - $this->changed = true; - } - - /** - * Sets the initialization vector. (optional) - * - * SetIV is not required when CRYPT_RIJNDAEL_MODE_ECB is being used. If not explictly set, it'll be assumed - * to be all zero's. - * - * @access public - * @param String $iv - */ - function setIV($iv) - { - $this->encryptIV = $this->decryptIV = $this->iv = str_pad(substr($iv, 0, $this->block_size), $this->block_size, chr(0));; - } - - /** - * Sets the key length - * - * Valid key lengths are 128, 160, 192, 224, and 256. If the length is less than 128, it will be rounded up to - * 128. If the length is greater then 128 and invalid, it will be rounded down to the closest valid amount. - * - * @access public - * @param Integer $length - */ - function setKeyLength($length) - { - $length >>= 5; - if ($length > 8) { - $length = 8; - } else if ($length < 4) { - $length = 4; - } - $this->Nk = $length; - $this->key_size = $length << 2; - - $this->explicit_key_length = true; - $this->changed = true; - } - - /** - * Sets the block length - * - * Valid block lengths are 128, 160, 192, 224, and 256. If the length is less than 128, it will be rounded up to - * 128. If the length is greater then 128 and invalid, it will be rounded down to the closest valid amount. - * - * @access public - * @param Integer $length - */ - function setBlockLength($length) - { - $length >>= 5; - if ($length > 8) { - $length = 8; - } else if ($length < 4) { - $length = 4; - } - $this->Nb = $length; - $this->block_size = $length << 2; - $this->changed = true; - } - - /** - * Generate CTR XOR encryption key - * - * Encrypt the output of this and XOR it against the ciphertext / plaintext to get the - * plaintext / ciphertext in CTR mode. - * - * @see Crypt_Rijndael::decrypt() - * @see Crypt_Rijndael::encrypt() - * @access public - * @param Integer $length - * @param String $iv - */ - function _generate_xor($length, &$iv) - { - $xor = ''; - $block_size = $this->block_size; - $num_blocks = floor(($length + ($block_size - 1)) / $block_size); - for ($i = 0; $i < $num_blocks; $i++) { - $xor.= $iv; - for ($j = 4; $j <= $block_size; $j+=4) { - $temp = substr($iv, -$j, 4); - switch ($temp) { - case "\xFF\xFF\xFF\xFF": - $iv = substr_replace($iv, "\x00\x00\x00\x00", -$j, 4); - break; - case "\x7F\xFF\xFF\xFF": - $iv = substr_replace($iv, "\x80\x00\x00\x00", -$j, 4); - break 2; - default: - extract(unpack('Ncount', $temp)); - $iv = substr_replace($iv, pack('N', $count + 1), -$j, 4); - break 2; - } - } - } - - return $xor; - } - - /** - * Encrypts a message. - * - * $plaintext will be padded with additional bytes such that it's length is a multiple of the block size. Other Rjindael - * implementations may or may not pad in the same manner. Other common approaches to padding and the reasons why it's - * necessary are discussed in the following - * URL: - * - * {@link http://www.di-mgt.com.au/cryptopad.html http://www.di-mgt.com.au/cryptopad.html} - * - * An alternative to padding is to, separately, send the length of the file. This is what SSH, in fact, does. - * strlen($plaintext) will still need to be a multiple of 8, however, arbitrary values can be added to make it that - * length. - * - * @see Crypt_Rijndael::decrypt() - * @access public - * @param String $plaintext - */ - function encrypt($plaintext) - { - $this->_setup(); - if ($this->paddable) { - $plaintext = $this->_pad($plaintext); - } - - $block_size = $this->block_size; - $buffer = &$this->enbuffer; - $continuousBuffer = $this->continuousBuffer; - $ciphertext = ''; - switch ($this->mode) { - case CRYPT_RIJNDAEL_MODE_ECB: - for ($i = 0; $i < strlen($plaintext); $i+=$block_size) { - $ciphertext.= $this->_encryptBlock(substr($plaintext, $i, $block_size)); - } - break; - case CRYPT_RIJNDAEL_MODE_CBC: - $xor = $this->encryptIV; - for ($i = 0; $i < strlen($plaintext); $i+=$block_size) { - $block = substr($plaintext, $i, $block_size); - $block = $this->_encryptBlock($block ^ $xor); - $xor = $block; - $ciphertext.= $block; - } - if ($this->continuousBuffer) { - $this->encryptIV = $xor; - } - break; - case CRYPT_RIJNDAEL_MODE_CTR: - $xor = $this->encryptIV; - if (!empty($buffer)) { - for ($i = 0; $i < strlen($plaintext); $i+=$block_size) { - $block = substr($plaintext, $i, $block_size); - $buffer.= $this->_encryptBlock($this->_generate_xor($block_size, $xor)); - $key = $this->_string_shift($buffer, $block_size); - $ciphertext.= $block ^ $key; - } - } else { - for ($i = 0; $i < strlen($plaintext); $i+=$block_size) { - $block = substr($plaintext, $i, $block_size); - $key = $this->_encryptBlock($this->_generate_xor($block_size, $xor)); - $ciphertext.= $block ^ $key; - } - } - if ($this->continuousBuffer) { - $this->encryptIV = $xor; - if ($start = strlen($plaintext) % $block_size) { - $buffer = substr($key, $start) . $buffer; - } - } - break; - case CRYPT_RIJNDAEL_MODE_CFB: - if (!empty($buffer['xor'])) { - $ciphertext = $plaintext ^ $buffer['xor']; - $iv = $buffer['encrypted'] . $ciphertext; - $start = strlen($ciphertext); - $buffer['encrypted'].= $ciphertext; - $buffer['xor'] = substr($buffer['xor'], strlen($ciphertext)); - } else { - $ciphertext = ''; - $iv = $this->encryptIV; - $start = 0; - } - - for ($i = $start; $i < strlen($plaintext); $i+=$block_size) { - $block = substr($plaintext, $i, $block_size); - $xor = $this->_encryptBlock($iv); - $iv = $block ^ $xor; - if ($continuousBuffer && strlen($iv) != $block_size) { - $buffer = array( - 'encrypted' => $iv, - 'xor' => substr($xor, strlen($iv)) - ); - } - $ciphertext.= $iv; - } - - if ($this->continuousBuffer) { - $this->encryptIV = $iv; - } - break; - case CRYPT_RIJNDAEL_MODE_OFB: - $xor = $this->encryptIV; - if (strlen($buffer)) { - for ($i = 0; $i < strlen($plaintext); $i+=$block_size) { - $xor = $this->_encryptBlock($xor); - $buffer.= $xor; - $key = $this->_string_shift($buffer, $block_size); - $ciphertext.= substr($plaintext, $i, $block_size) ^ $key; - } - } else { - for ($i = 0; $i < strlen($plaintext); $i+=$block_size) { - $xor = $this->_encryptBlock($xor); - $ciphertext.= substr($plaintext, $i, $block_size) ^ $xor; - } - $key = $xor; - } - if ($this->continuousBuffer) { - $this->encryptIV = $xor; - if ($start = strlen($plaintext) % $block_size) { - $buffer = substr($key, $start) . $buffer; - } - } - } - - return $ciphertext; - } - - /** - * Decrypts a message. - * - * If strlen($ciphertext) is not a multiple of the block size, null bytes will be added to the end of the string until - * it is. - * - * @see Crypt_Rijndael::encrypt() - * @access public - * @param String $ciphertext - */ - function decrypt($ciphertext) - { - $this->_setup(); - - if ($this->paddable) { - // we pad with chr(0) since that's what mcrypt_generic does. to quote from http://php.net/function.mcrypt-generic : - // "The data is padded with "\0" to make sure the length of the data is n * blocksize." - $ciphertext = str_pad($ciphertext, strlen($ciphertext) + ($this->block_size - strlen($ciphertext) % $this->block_size) % $this->block_size, chr(0)); - } - - $block_size = $this->block_size; - $buffer = &$this->debuffer; - $continuousBuffer = $this->continuousBuffer; - $plaintext = ''; - switch ($this->mode) { - case CRYPT_RIJNDAEL_MODE_ECB: - for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) { - $plaintext.= $this->_decryptBlock(substr($ciphertext, $i, $block_size)); - } - break; - case CRYPT_RIJNDAEL_MODE_CBC: - $xor = $this->decryptIV; - for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) { - $block = substr($ciphertext, $i, $block_size); - $plaintext.= $this->_decryptBlock($block) ^ $xor; - $xor = $block; - } - if ($this->continuousBuffer) { - $this->decryptIV = $xor; - } - break; - case CRYPT_RIJNDAEL_MODE_CTR: - $xor = $this->decryptIV; - if (strlen($buffer)) { - for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) { - $block = substr($ciphertext, $i, $block_size); - $buffer.= $this->_encryptBlock($this->_generate_xor($block_size, $xor)); - $key = $this->_string_shift($buffer, $block_size); - $plaintext.= $block ^ $key; - } - } else { - for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) { - $block = substr($ciphertext, $i, $block_size); - $key = $this->_encryptBlock($this->_generate_xor($block_size, $xor)); - $plaintext.= $block ^ $key; - } - } - if ($this->continuousBuffer) { - $this->decryptIV = $xor; - if ($start = strlen($ciphertext) % $block_size) { - $buffer = substr($key, $start) . $buffer; - } - } - break; - case CRYPT_RIJNDAEL_MODE_CFB: - if (!empty($buffer['ciphertext'])) { - $plaintext = $ciphertext ^ substr($this->decryptIV, strlen($buffer['ciphertext'])); - $buffer['ciphertext'].= substr($ciphertext, 0, strlen($plaintext)); - if (strlen($buffer['ciphertext']) == $block_size) { - $xor = $this->_encryptBlock($buffer['ciphertext']); - $buffer['ciphertext'] = ''; - } - $start = strlen($plaintext); - $block = $this->decryptIV; - } else { - $plaintext = ''; - $xor = $this->_encryptBlock($this->decryptIV); - $start = 0; - } - - for ($i = $start; $i < strlen($ciphertext); $i+=$block_size) { - $block = substr($ciphertext, $i, $block_size); - $plaintext.= $block ^ $xor; - if ($continuousBuffer && strlen($block) != $block_size) { - $buffer['ciphertext'].= $block; - $block = $xor; - } else if (strlen($block) == $block_size) { - $xor = $this->_encryptBlock($block); - } - } - if ($this->continuousBuffer) { - $this->decryptIV = $block; - } - break; - case CRYPT_RIJNDAEL_MODE_OFB: - $xor = $this->decryptIV; - if (strlen($buffer)) { - for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) { - $xor = $this->_encryptBlock($xor); - $buffer.= $xor; - $key = $this->_string_shift($buffer, $block_size); - $plaintext.= substr($ciphertext, $i, $block_size) ^ $key; - } - } else { - for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) { - $xor = $this->_encryptBlock($xor); - $plaintext.= substr($ciphertext, $i, $block_size) ^ $xor; - } - $key = $xor; - } - if ($this->continuousBuffer) { - $this->decryptIV = $xor; - if ($start = strlen($ciphertext) % $block_size) { - $buffer = substr($key, $start) . $buffer; - } - } - } - - return $this->paddable ? $this->_unpad($plaintext) : $plaintext; - } - - /** - * Encrypts a block - * - * @access private - * @param String $in - * @return String - */ - function _encryptBlock($in) - { - $state = array(); - $words = unpack('N*word', $in); - - $w = $this->w; - $t0 = $this->t0; - $t1 = $this->t1; - $t2 = $this->t2; - $t3 = $this->t3; - $Nb = $this->Nb; - $Nr = $this->Nr; - $c = $this->c; - - // addRoundKey - $i = 0; - foreach ($words as $word) { - $state[] = $word ^ $w[0][$i++]; - } - - // fips-197.pdf#page=19, "Figure 5. Pseudo Code for the Cipher", states that this loop has four components - - // subBytes, shiftRows, mixColumns, and addRoundKey. fips-197.pdf#page=30, "Implementation Suggestions Regarding - // Various Platforms" suggests that performs enhanced implementations are described in Rijndael-ammended.pdf. - // Rijndael-ammended.pdf#page=20, "Implementation aspects / 32-bit processor", discusses such an optimization. - // Unfortunately, the description given there is not quite correct. Per aes.spec.v316.pdf#page=19 [1], - // equation (7.4.7) is supposed to use addition instead of subtraction, so we'll do that here, as well. - - // [1] http://fp.gladman.plus.com/cryptography_technology/rijndael/aes.spec.v316.pdf - $temp = array(); - for ($round = 1; $round < $Nr; $round++) { - $i = 0; // $c[0] == 0 - $j = $c[1]; - $k = $c[2]; - $l = $c[3]; - - while ($i < $this->Nb) { - $temp[$i] = $t0[$state[$i] & 0xFF000000] ^ - $t1[$state[$j] & 0x00FF0000] ^ - $t2[$state[$k] & 0x0000FF00] ^ - $t3[$state[$l] & 0x000000FF] ^ - $w[$round][$i]; - $i++; - $j = ($j + 1) % $Nb; - $k = ($k + 1) % $Nb; - $l = ($l + 1) % $Nb; - } - - for ($i = 0; $i < $Nb; $i++) { - $state[$i] = $temp[$i]; - } - } - - // subWord - for ($i = 0; $i < $Nb; $i++) { - $state[$i] = $this->_subWord($state[$i]); - } - - // shiftRows + addRoundKey - $i = 0; // $c[0] == 0 - $j = $c[1]; - $k = $c[2]; - $l = $c[3]; - while ($i < $this->Nb) { - $temp[$i] = ($state[$i] & 0xFF000000) ^ - ($state[$j] & 0x00FF0000) ^ - ($state[$k] & 0x0000FF00) ^ - ($state[$l] & 0x000000FF) ^ - $w[$Nr][$i]; - $i++; - $j = ($j + 1) % $Nb; - $k = ($k + 1) % $Nb; - $l = ($l + 1) % $Nb; - } - $state = $temp; - - array_unshift($state, 'N*'); - - return call_user_func_array('pack', $state); - } - - /** - * Decrypts a block - * - * @access private - * @param String $in - * @return String - */ - function _decryptBlock($in) - { - $state = array(); - $words = unpack('N*word', $in); - - $num_states = count($state); - $dw = $this->dw; - $dt0 = $this->dt0; - $dt1 = $this->dt1; - $dt2 = $this->dt2; - $dt3 = $this->dt3; - $Nb = $this->Nb; - $Nr = $this->Nr; - $c = $this->c; - - // addRoundKey - $i = 0; - foreach ($words as $word) { - $state[] = $word ^ $dw[$Nr][$i++]; - } - - $temp = array(); - for ($round = $Nr - 1; $round > 0; $round--) { - $i = 0; // $c[0] == 0 - $j = $Nb - $c[1]; - $k = $Nb - $c[2]; - $l = $Nb - $c[3]; - - while ($i < $Nb) { - $temp[$i] = $dt0[$state[$i] & 0xFF000000] ^ - $dt1[$state[$j] & 0x00FF0000] ^ - $dt2[$state[$k] & 0x0000FF00] ^ - $dt3[$state[$l] & 0x000000FF] ^ - $dw[$round][$i]; - $i++; - $j = ($j + 1) % $Nb; - $k = ($k + 1) % $Nb; - $l = ($l + 1) % $Nb; - } - - for ($i = 0; $i < $Nb; $i++) { - $state[$i] = $temp[$i]; - } - } - - // invShiftRows + invSubWord + addRoundKey - $i = 0; // $c[0] == 0 - $j = $Nb - $c[1]; - $k = $Nb - $c[2]; - $l = $Nb - $c[3]; - - while ($i < $Nb) { - $temp[$i] = $dw[0][$i] ^ - $this->_invSubWord(($state[$i] & 0xFF000000) | - ($state[$j] & 0x00FF0000) | - ($state[$k] & 0x0000FF00) | - ($state[$l] & 0x000000FF)); - $i++; - $j = ($j + 1) % $Nb; - $k = ($k + 1) % $Nb; - $l = ($l + 1) % $Nb; - } - - $state = $temp; - - array_unshift($state, 'N*'); - - return call_user_func_array('pack', $state); - } - - /** - * Setup Rijndael - * - * Validates all the variables and calculates $Nr - the number of rounds that need to be performed - and $w - the key - * key schedule. - * - * @access private - */ - function _setup() - { - // Each number in $rcon is equal to the previous number multiplied by two in Rijndael's finite field. - // See http://en.wikipedia.org/wiki/Finite_field_arithmetic#Multiplicative_inverse - static $rcon = array(0, - 0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000, - 0x20000000, 0x40000000, 0x80000000, 0x1B000000, 0x36000000, - 0x6C000000, 0xD8000000, 0xAB000000, 0x4D000000, 0x9A000000, - 0x2F000000, 0x5E000000, 0xBC000000, 0x63000000, 0xC6000000, - 0x97000000, 0x35000000, 0x6A000000, 0xD4000000, 0xB3000000, - 0x7D000000, 0xFA000000, 0xEF000000, 0xC5000000, 0x91000000 - ); - - if (!$this->changed) { - return; - } - - if (!$this->explicit_key_length) { - // we do >> 2, here, and not >> 5, as we do above, since strlen($this->key) tells us the number of bytes - not bits - $length = strlen($this->key) >> 2; - if ($length > 8) { - $length = 8; - } else if ($length < 4) { - $length = 4; - } - $this->Nk = $length; - $this->key_size = $length << 2; - } - - $this->key = str_pad(substr($this->key, 0, $this->key_size), $this->key_size, chr(0)); - $this->encryptIV = $this->decryptIV = $this->iv = str_pad(substr($this->iv, 0, $this->block_size), $this->block_size, chr(0)); - - // see Rijndael-ammended.pdf#page=44 - $this->Nr = max($this->Nk, $this->Nb) + 6; - - // shift offsets for Nb = 5, 7 are defined in Rijndael-ammended.pdf#page=44, - // "Table 8: Shift offsets in Shiftrow for the alternative block lengths" - // shift offsets for Nb = 4, 6, 8 are defined in Rijndael-ammended.pdf#page=14, - // "Table 2: Shift offsets for different block lengths" - switch ($this->Nb) { - case 4: - case 5: - case 6: - $this->c = array(0, 1, 2, 3); - break; - case 7: - $this->c = array(0, 1, 2, 4); - break; - case 8: - $this->c = array(0, 1, 3, 4); - } - - $key = $this->key; - - $w = array_values(unpack('N*words', $key)); - - $length = $this->Nb * ($this->Nr + 1); - for ($i = $this->Nk; $i < $length; $i++) { - $temp = $w[$i - 1]; - if ($i % $this->Nk == 0) { - // according to <http://php.net/language.types.integer>, "the size of an integer is platform-dependent". - // on a 32-bit machine, it's 32-bits, and on a 64-bit machine, it's 64-bits. on a 32-bit machine, - // 0xFFFFFFFF << 8 == 0xFFFFFF00, but on a 64-bit machine, it equals 0xFFFFFFFF00. as such, doing 'and' - // with 0xFFFFFFFF (or 0xFFFFFF00) on a 32-bit machine is unnecessary, but on a 64-bit machine, it is. - $temp = (($temp << 8) & 0xFFFFFF00) | (($temp >> 24) & 0x000000FF); // rotWord - $temp = $this->_subWord($temp) ^ $rcon[$i / $this->Nk]; - } else if ($this->Nk > 6 && $i % $this->Nk == 4) { - $temp = $this->_subWord($temp); - } - $w[$i] = $w[$i - $this->Nk] ^ $temp; - } - - // convert the key schedule from a vector of $Nb * ($Nr + 1) length to a matrix with $Nr + 1 rows and $Nb columns - // and generate the inverse key schedule. more specifically, - // according to <http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=23> (section 5.3.3), - // "The key expansion for the Inverse Cipher is defined as follows: - // 1. Apply the Key Expansion. - // 2. Apply InvMixColumn to all Round Keys except the first and the last one." - // also, see fips-197.pdf#page=27, "5.3.5 Equivalent Inverse Cipher" - $temp = array(); - for ($i = $row = $col = 0; $i < $length; $i++, $col++) { - if ($col == $this->Nb) { - if ($row == 0) { - $this->dw[0] = $this->w[0]; - } else { - // subWord + invMixColumn + invSubWord = invMixColumn - $j = 0; - while ($j < $this->Nb) { - $dw = $this->_subWord($this->w[$row][$j]); - $temp[$j] = $this->dt0[$dw & 0xFF000000] ^ - $this->dt1[$dw & 0x00FF0000] ^ - $this->dt2[$dw & 0x0000FF00] ^ - $this->dt3[$dw & 0x000000FF]; - $j++; - } - $this->dw[$row] = $temp; - } - - $col = 0; - $row++; - } - $this->w[$row][$col] = $w[$i]; - } - - $this->dw[$row] = $this->w[$row]; - - $this->changed = false; - } - - /** - * Performs S-Box substitutions - * - * @access private - */ - function _subWord($word) - { - static $sbox0, $sbox1, $sbox2, $sbox3; - - if (empty($sbox0)) { - $sbox0 = array( - 0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76, - 0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0, - 0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15, - 0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75, - 0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84, - 0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF, - 0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8, - 0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2, - 0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73, - 0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB, - 0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79, - 0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08, - 0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A, - 0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E, - 0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF, - 0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16 - ); - - $sbox1 = array(); - $sbox2 = array(); - $sbox3 = array(); - - for ($i = 0; $i < 256; $i++) { - $sbox1[$i << 8] = $sbox0[$i] << 8; - $sbox2[$i << 16] = $sbox0[$i] << 16; - $sbox3[$i << 24] = $sbox0[$i] << 24; - } - } - - return $sbox0[$word & 0x000000FF] | - $sbox1[$word & 0x0000FF00] | - $sbox2[$word & 0x00FF0000] | - $sbox3[$word & 0xFF000000]; - } - - /** - * Performs inverse S-Box substitutions - * - * @access private - */ - function _invSubWord($word) - { - static $sbox0, $sbox1, $sbox2, $sbox3; - - if (empty($sbox0)) { - $sbox0 = array( - 0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38, 0xBF, 0x40, 0xA3, 0x9E, 0x81, 0xF3, 0xD7, 0xFB, - 0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87, 0x34, 0x8E, 0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB, - 0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23, 0x3D, 0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E, - 0x08, 0x2E, 0xA1, 0x66, 0x28, 0xD9, 0x24, 0xB2, 0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B, 0xD1, 0x25, - 0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92, - 0x6C, 0x70, 0x48, 0x50, 0xFD, 0xED, 0xB9, 0xDA, 0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D, 0x84, - 0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A, 0xF7, 0xE4, 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06, - 0xD0, 0x2C, 0x1E, 0x8F, 0xCA, 0x3F, 0x0F, 0x02, 0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B, - 0x3A, 0x91, 0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA, 0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6, 0x73, - 0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85, 0xE2, 0xF9, 0x37, 0xE8, 0x1C, 0x75, 0xDF, 0x6E, - 0x47, 0xF1, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89, 0x6F, 0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B, - 0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2, 0x79, 0x20, 0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4, - 0x1F, 0xDD, 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31, 0xB1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xEC, 0x5F, - 0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D, 0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF, - 0xA0, 0xE0, 0x3B, 0x4D, 0xAE, 0x2A, 0xF5, 0xB0, 0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61, - 0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26, 0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D - ); - - $sbox1 = array(); - $sbox2 = array(); - $sbox3 = array(); - - for ($i = 0; $i < 256; $i++) { - $sbox1[$i << 8] = $sbox0[$i] << 8; - $sbox2[$i << 16] = $sbox0[$i] << 16; - $sbox3[$i << 24] = $sbox0[$i] << 24; - } - } - - return $sbox0[$word & 0x000000FF] | - $sbox1[$word & 0x0000FF00] | - $sbox2[$word & 0x00FF0000] | - $sbox3[$word & 0xFF000000]; - } - - /** - * Pad "packets". - * - * Rijndael works by encrypting between sixteen and thirty-two bytes at a time, provided that number is also a multiple - * of four. If you ever need to encrypt or decrypt something that isn't of the proper length, it becomes necessary to - * pad the input so that it is of the proper length. - * - * Padding is enabled by default. Sometimes, however, it is undesirable to pad strings. Such is the case in SSH, - * where "packets" are padded with random bytes before being encrypted. Unpad these packets and you risk stripping - * away characters that shouldn't be stripped away. (SSH knows how many bytes are added because the length is - * transmitted separately) - * - * @see Crypt_Rijndael::disablePadding() - * @access public - */ - function enablePadding() - { - $this->padding = true; - } - - /** - * Do not pad packets. - * - * @see Crypt_Rijndael::enablePadding() - * @access public - */ - function disablePadding() - { - $this->padding = false; - } - - /** - * Pads a string - * - * Pads a string using the RSA PKCS padding standards so that its length is a multiple of the blocksize. - * $block_size - (strlen($text) % $block_size) bytes are added, each of which is equal to - * chr($block_size - (strlen($text) % $block_size) - * - * If padding is disabled and $text is not a multiple of the blocksize, the string will be padded regardless - * and padding will, hence forth, be enabled. - * - * @see Crypt_Rijndael::_unpad() - * @access private - */ - function _pad($text) - { - $length = strlen($text); - - if (!$this->padding) { - if ($length % $this->block_size == 0) { - return $text; - } else { - user_error("The plaintext's length ($length) is not a multiple of the block size ({$this->block_size})", E_USER_NOTICE); - $this->padding = true; - } - } - - $pad = $this->block_size - ($length % $this->block_size); - - return str_pad($text, $length + $pad, chr($pad)); - } - - /** - * Unpads a string. - * - * If padding is enabled and the reported padding length is invalid the encryption key will be assumed to be wrong - * and false will be returned. - * - * @see Crypt_Rijndael::_pad() - * @access private - */ - function _unpad($text) - { - if (!$this->padding) { - return $text; - } - - $length = ord($text[strlen($text) - 1]); - - if (!$length || $length > $this->block_size) { - return false; - } - - return substr($text, 0, -$length); - } - - /** - * Treat consecutive "packets" as if they are a continuous buffer. - * - * Say you have a 32-byte plaintext $plaintext. Using the default behavior, the two following code snippets - * will yield different outputs: - * - * <code> - * echo $rijndael->encrypt(substr($plaintext, 0, 16)); - * echo $rijndael->encrypt(substr($plaintext, 16, 16)); - * </code> - * <code> - * echo $rijndael->encrypt($plaintext); - * </code> - * - * The solution is to enable the continuous buffer. Although this will resolve the above discrepancy, it creates - * another, as demonstrated with the following: - * - * <code> - * $rijndael->encrypt(substr($plaintext, 0, 16)); - * echo $rijndael->decrypt($des->encrypt(substr($plaintext, 16, 16))); - * </code> - * <code> - * echo $rijndael->decrypt($des->encrypt(substr($plaintext, 16, 16))); - * </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 / - * decryption round when the continuous buffer is enabled. When it's disabled, they remain constant. - * - * Put another way, when the continuous buffer is enabled, the state of the Crypt_Rijndael() 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), - * however, they are also less intuitive and more likely to cause you problems. - * - * @see Crypt_Rijndael::disableContinuousBuffer() - * @access public - */ - function enableContinuousBuffer() - { - $this->continuousBuffer = true; - } - - /** - * Treat consecutive packets as if they are a discontinuous buffer. - * - * The default behavior. - * - * @see Crypt_Rijndael::enableContinuousBuffer() - * @access public - */ - function disableContinuousBuffer() - { - $this->continuousBuffer = false; - $this->encryptIV = $this->iv; - $this->decryptIV = $this->iv; - } - - /** - * String Shift - * - * Inspired by array_shift - * - * @param String $string - * @param optional Integer $index - * @return String - * @access private - */ - function _string_shift(&$string, $index = 1) - { - $substr = substr($string, 0, $index); - $string = substr($string, $index); - return $substr; - } -} - -// vim: ts=4:sw=4:et: -// vim6: fdl=1: \ No newline at end of file +<?php + +/** + * Pure-PHP implementation of Rijndael. + * + * Uses mcrypt, if available/possible, and an internal implementation, otherwise. + * + * PHP versions 4 and 5 + * + * If {@link self::setBlockLength() setBlockLength()} isn't called, it'll be assumed to be 128 bits. If + * {@link self::setKeyLength() setKeyLength()} isn't called, it'll be calculated from + * {@link self::setKey() setKey()}. ie. if the key is 128-bits, the key length will be 128-bits. If it's + * 136-bits it'll be null-padded to 192-bits and 192 bits will be the key length until + * {@link self::setKey() setKey()} is called, again, at which point, it'll be recalculated. + * + * Not all Rijndael implementations may support 160-bits or 224-bits as the block length / key length. mcrypt, for example, + * does not. AES, itself, only supports block lengths of 128 and key lengths of 128, 192, and 256. + * {@link http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=10 Rijndael-ammended.pdf#page=10} defines the + * algorithm for block lengths of 192 and 256 but not for block lengths / key lengths of 160 and 224. Indeed, 160 and 224 + * are first defined as valid key / block lengths in + * {@link http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=44 Rijndael-ammended.pdf#page=44}: + * Extensions: Other block and Cipher Key lengths. + * Note: Use of 160/224-bit Keys must be explicitly set by setKeyLength(160) respectively setKeyLength(224). + * + * {@internal The variable names are the same as those in + * {@link http://www.csrc.nist.gov/publications/fips/fips197/fips-197.pdf#page=10 fips-197.pdf#page=10}.}} + * + * Here's a short example of how to use this library: + * <code> + * <?php + * include 'Crypt/Rijndael.php'; + * + * $rijndael = new Crypt_Rijndael(); + * + * $rijndael->setKey('abcdefghijklmnop'); + * + * $size = 10 * 1024; + * $plaintext = ''; + * for ($i = 0; $i < $size; $i++) { + * $plaintext.= 'a'; + * } + * + * echo $rijndael->decrypt($rijndael->encrypt($plaintext)); + * ?> + * </code> + * + * LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * @category Crypt + * @package Crypt_Rijndael + * @author Jim Wigginton <[email protected]> + * @copyright 2008 Jim Wigginton + * @license http://www.opensource.org/licenses/mit-license.html MIT License + * @link http://phpseclib.sourceforge.net + */ + +/** + * Include Crypt_Base + * + * Base cipher class + */ +if (!class_exists('Crypt_Base')) { + include_once 'Base.php'; +} + +/**#@+ + * @access public + * @see self::encrypt() + * @see self::decrypt() + */ +/** + * Encrypt / decrypt using the Counter mode. + * + * Set to -1 since that's what Crypt/Random.php uses to index the CTR mode. + * + * @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Counter_.28CTR.29 + */ +define('CRYPT_RIJNDAEL_MODE_CTR', CRYPT_MODE_CTR); +/** + * Encrypt / decrypt using the Electronic Code Book mode. + * + * @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Electronic_codebook_.28ECB.29 + */ +define('CRYPT_RIJNDAEL_MODE_ECB', CRYPT_MODE_ECB); +/** + * Encrypt / decrypt using the Code Book Chaining mode. + * + * @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher-block_chaining_.28CBC.29 + */ +define('CRYPT_RIJNDAEL_MODE_CBC', CRYPT_MODE_CBC); +/** + * Encrypt / decrypt using the Cipher Feedback mode. + * + * @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher_feedback_.28CFB.29 + */ +define('CRYPT_RIJNDAEL_MODE_CFB', CRYPT_MODE_CFB); +/** + * Encrypt / decrypt using the Cipher Feedback mode. + * + * @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Output_feedback_.28OFB.29 + */ +define('CRYPT_RIJNDAEL_MODE_OFB', CRYPT_MODE_OFB); +/**#@-*/ + +/** + * Pure-PHP implementation of Rijndael. + * + * @package Crypt_Rijndael + * @author Jim Wigginton <[email protected]> + * @access public + */ +class Crypt_Rijndael extends Crypt_Base +{ + /** + * The namespace used by the cipher for its constants. + * + * @see Crypt_Base::const_namespace + * @var string + * @access private + */ + var $const_namespace = 'RIJNDAEL'; + + /** + * The mcrypt specific name of the cipher + * + * Mcrypt is useable for 128/192/256-bit $block_size/$key_length. For 160/224 not. + * Crypt_Rijndael determines automatically whether mcrypt is useable + * or not for the current $block_size/$key_length. + * In case of, $cipher_name_mcrypt will be set dynamically at run time accordingly. + * + * @see Crypt_Base::cipher_name_mcrypt + * @see Crypt_Base::engine + * @see self::isValidEngine() + * @var string + * @access private + */ + var $cipher_name_mcrypt = 'rijndael-128'; + + /** + * The default salt used by setPassword() + * + * @see Crypt_Base::password_default_salt + * @see Crypt_Base::setPassword() + * @var string + * @access private + */ + var $password_default_salt = 'phpseclib'; + + /** + * The Key Schedule + * + * @see self::_setup() + * @var array + * @access private + */ + var $w; + + /** + * The Inverse Key Schedule + * + * @see self::_setup() + * @var array + * @access private + */ + var $dw; + + /** + * The Block Length divided by 32 + * + * @see self::setBlockLength() + * @var int + * @access private + * @internal The max value is 256 / 32 = 8, the min value is 128 / 32 = 4. Exists in conjunction with $block_size + * because the encryption / decryption / key schedule creation requires this number and not $block_size. We could + * derive this from $block_size or vice versa, but that'd mean we'd have to do multiple shift operations, so in lieu + * of that, we'll just precompute it once. + */ + var $Nb = 4; + + /** + * The Key Length (in bytes) + * + * @see self::setKeyLength() + * @var int + * @access private + * @internal The max value is 256 / 8 = 32, the min value is 128 / 8 = 16. Exists in conjunction with $Nk + * because the encryption / decryption / key schedule creation requires this number and not $key_length. We could + * derive this from $key_length or vice versa, but that'd mean we'd have to do multiple shift operations, so in lieu + * of that, we'll just precompute it once. + */ + var $key_length = 16; + + /** + * The Key Length divided by 32 + * + * @see self::setKeyLength() + * @var int + * @access private + * @internal The max value is 256 / 32 = 8, the min value is 128 / 32 = 4 + */ + var $Nk = 4; + + /** + * The Number of Rounds + * + * @var int + * @access private + * @internal The max value is 14, the min value is 10. + */ + var $Nr; + + /** + * Shift offsets + * + * @var array + * @access private + */ + var $c; + + /** + * Holds the last used key- and block_size information + * + * @var array + * @access private + */ + var $kl; + + /** + * Sets the key. + * + * Keys can be of any length. Rijndael, itself, requires the use of a key that's between 128-bits and 256-bits long and + * whose length is a multiple of 32. If the key is less than 256-bits and the key length isn't set, we round the length + * up to the closest valid key length, padding $key with null bytes. If the key is more than 256-bits, we trim the + * excess bits. + * + * If the key is not explicitly set, it'll be assumed to be all null bytes. + * + * Note: 160/224-bit keys must explicitly set by setKeyLength(), otherwise they will be round/pad up to 192/256 bits. + * + * @see Crypt_Base:setKey() + * @see self::setKeyLength() + * @access public + * @param string $key + */ + function setKey($key) + { + if (!$this->explicit_key_length) { + $length = strlen($key); + switch (true) { + case $length <= 16: + $this->key_size = 16; + break; + case $length <= 20: + $this->key_size = 20; + break; + case $length <= 24: + $this->key_size = 24; + break; + case $length <= 28: + $this->key_size = 28; + break; + default: + $this->key_size = 32; + } + } + parent::setKey($key); + } + + /** + * Sets the key length + * + * Valid key lengths are 128, 160, 192, 224, and 256. If the length is less than 128, it will be rounded up to + * 128. If the length is greater than 128 and invalid, it will be rounded down to the closest valid amount. + * + * Note: phpseclib extends Rijndael (and AES) for using 160- and 224-bit keys but they are officially not defined + * and the most (if not all) implementations are not able using 160/224-bit keys but round/pad them up to + * 192/256 bits as, for example, mcrypt will do. + * + * That said, if you want be compatible with other Rijndael and AES implementations, + * you should not setKeyLength(160) or setKeyLength(224). + * + * Additional: In case of 160- and 224-bit keys, phpseclib will/can, for that reason, not use + * the mcrypt php extension, even if available. + * This results then in slower encryption. + * + * @access public + * @param int $length + */ + function setKeyLength($length) + { + switch (true) { + case $length <= 128: + $this->key_length = 16; + break; + case $length <= 160: + $this->key_length = 20; + break; + case $length <= 192: + $this->key_length = 24; + break; + case $length <= 224: + $this->key_length = 28; + break; + default: + $this->key_length = 32; + } + + parent::setKeyLength($length); + } + + /** + * Sets the block length + * + * Valid block lengths are 128, 160, 192, 224, and 256. If the length is less than 128, it will be rounded up to + * 128. If the length is greater than 128 and invalid, it will be rounded down to the closest valid amount. + * + * @access public + * @param int $length + */ + function setBlockLength($length) + { + $length >>= 5; + if ($length > 8) { + $length = 8; + } elseif ($length < 4) { + $length = 4; + } + $this->Nb = $length; + $this->block_size = $length << 2; + $this->changed = true; + $this->_setEngine(); + } + + /** + * Test for engine validity + * + * This is mainly just a wrapper to set things up for Crypt_Base::isValidEngine() + * + * @see Crypt_Base::Crypt_Base() + * @param int $engine + * @access public + * @return bool + */ + function isValidEngine($engine) + { + switch ($engine) { + case CRYPT_ENGINE_OPENSSL: + if ($this->block_size != 16) { + return false; + } + $this->cipher_name_openssl_ecb = 'aes-' . ($this->key_length << 3) . '-ecb'; + $this->cipher_name_openssl = 'aes-' . ($this->key_length << 3) . '-' . $this->_openssl_translate_mode(); + break; + case CRYPT_ENGINE_MCRYPT: + $this->cipher_name_mcrypt = 'rijndael-' . ($this->block_size << 3); + if ($this->key_length % 8) { // is it a 160/224-bit key? + // mcrypt is not usable for them, only for 128/192/256-bit keys + return false; + } + } + + return parent::isValidEngine($engine); + } + + /** + * Encrypts a block + * + * @access private + * @param string $in + * @return string + */ + function _encryptBlock($in) + { + static $tables; + if (empty($tables)) { + $tables = &$this->_getTables(); + } + $t0 = $tables[0]; + $t1 = $tables[1]; + $t2 = $tables[2]; + $t3 = $tables[3]; + $sbox = $tables[4]; + + $state = array(); + $words = unpack('N*', $in); + + $c = $this->c; + $w = $this->w; + $Nb = $this->Nb; + $Nr = $this->Nr; + + // addRoundKey + $wc = $Nb - 1; + foreach ($words as $word) { + $state[] = $word ^ $w[++$wc]; + } + + // fips-197.pdf#page=19, "Figure 5. Pseudo Code for the Cipher", states that this loop has four components - + // subBytes, shiftRows, mixColumns, and addRoundKey. fips-197.pdf#page=30, "Implementation Suggestions Regarding + // Various Platforms" suggests that performs enhanced implementations are described in Rijndael-ammended.pdf. + // Rijndael-ammended.pdf#page=20, "Implementation aspects / 32-bit processor", discusses such an optimization. + // Unfortunately, the description given there is not quite correct. Per aes.spec.v316.pdf#page=19 [1], + // equation (7.4.7) is supposed to use addition instead of subtraction, so we'll do that here, as well. + + // [1] http://fp.gladman.plus.com/cryptography_technology/rijndael/aes.spec.v316.pdf + $temp = array(); + for ($round = 1; $round < $Nr; ++$round) { + $i = 0; // $c[0] == 0 + $j = $c[1]; + $k = $c[2]; + $l = $c[3]; + + while ($i < $Nb) { + $temp[$i] = $t0[$state[$i] >> 24 & 0x000000FF] ^ + $t1[$state[$j] >> 16 & 0x000000FF] ^ + $t2[$state[$k] >> 8 & 0x000000FF] ^ + $t3[$state[$l] & 0x000000FF] ^ + $w[++$wc]; + ++$i; + $j = ($j + 1) % $Nb; + $k = ($k + 1) % $Nb; + $l = ($l + 1) % $Nb; + } + $state = $temp; + } + + // subWord + for ($i = 0; $i < $Nb; ++$i) { + $state[$i] = $sbox[$state[$i] & 0x000000FF] | + ($sbox[$state[$i] >> 8 & 0x000000FF] << 8) | + ($sbox[$state[$i] >> 16 & 0x000000FF] << 16) | + ($sbox[$state[$i] >> 24 & 0x000000FF] << 24); + } + + // shiftRows + addRoundKey + $i = 0; // $c[0] == 0 + $j = $c[1]; + $k = $c[2]; + $l = $c[3]; + while ($i < $Nb) { + $temp[$i] = ($state[$i] & 0xFF000000) ^ + ($state[$j] & 0x00FF0000) ^ + ($state[$k] & 0x0000FF00) ^ + ($state[$l] & 0x000000FF) ^ + $w[$i]; + ++$i; + $j = ($j + 1) % $Nb; + $k = ($k + 1) % $Nb; + $l = ($l + 1) % $Nb; + } + + switch ($Nb) { + case 8: + return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6], $temp[7]); + case 7: + return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6]); + case 6: + return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5]); + case 5: + return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4]); + default: + return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3]); + } + } + + /** + * Decrypts a block + * + * @access private + * @param string $in + * @return string + */ + function _decryptBlock($in) + { + static $invtables; + if (empty($invtables)) { + $invtables = &$this->_getInvTables(); + } + $dt0 = $invtables[0]; + $dt1 = $invtables[1]; + $dt2 = $invtables[2]; + $dt3 = $invtables[3]; + $isbox = $invtables[4]; + + $state = array(); + $words = unpack('N*', $in); + + $c = $this->c; + $dw = $this->dw; + $Nb = $this->Nb; + $Nr = $this->Nr; + + // addRoundKey + $wc = $Nb - 1; + foreach ($words as $word) { + $state[] = $word ^ $dw[++$wc]; + } + + $temp = array(); + for ($round = $Nr - 1; $round > 0; --$round) { + $i = 0; // $c[0] == 0 + $j = $Nb - $c[1]; + $k = $Nb - $c[2]; + $l = $Nb - $c[3]; + + while ($i < $Nb) { + $temp[$i] = $dt0[$state[$i] >> 24 & 0x000000FF] ^ + $dt1[$state[$j] >> 16 & 0x000000FF] ^ + $dt2[$state[$k] >> 8 & 0x000000FF] ^ + $dt3[$state[$l] & 0x000000FF] ^ + $dw[++$wc]; + ++$i; + $j = ($j + 1) % $Nb; + $k = ($k + 1) % $Nb; + $l = ($l + 1) % $Nb; + } + $state = $temp; + } + + // invShiftRows + invSubWord + addRoundKey + $i = 0; // $c[0] == 0 + $j = $Nb - $c[1]; + $k = $Nb - $c[2]; + $l = $Nb - $c[3]; + + while ($i < $Nb) { + $word = ($state[$i] & 0xFF000000) | + ($state[$j] & 0x00FF0000) | + ($state[$k] & 0x0000FF00) | + ($state[$l] & 0x000000FF); + + $temp[$i] = $dw[$i] ^ ($isbox[$word & 0x000000FF] | + ($isbox[$word >> 8 & 0x000000FF] << 8) | + ($isbox[$word >> 16 & 0x000000FF] << 16) | + ($isbox[$word >> 24 & 0x000000FF] << 24)); + ++$i; + $j = ($j + 1) % $Nb; + $k = ($k + 1) % $Nb; + $l = ($l + 1) % $Nb; + } + + switch ($Nb) { + case 8: + return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6], $temp[7]); + case 7: + return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6]); + case 6: + return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5]); + case 5: + return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4]); + default: + return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3]); + } + } + + /** + * Setup the key (expansion) + * + * @see Crypt_Base::_setupKey() + * @access private + */ + function _setupKey() + { + // Each number in $rcon is equal to the previous number multiplied by two in Rijndael's finite field. + // See http://en.wikipedia.org/wiki/Finite_field_arithmetic#Multiplicative_inverse + static $rcon = array(0, + 0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000, + 0x20000000, 0x40000000, 0x80000000, 0x1B000000, 0x36000000, + 0x6C000000, 0xD8000000, 0xAB000000, 0x4D000000, 0x9A000000, + 0x2F000000, 0x5E000000, 0xBC000000, 0x63000000, 0xC6000000, + 0x97000000, 0x35000000, 0x6A000000, 0xD4000000, 0xB3000000, + 0x7D000000, 0xFA000000, 0xEF000000, 0xC5000000, 0x91000000 + ); + + if (isset($this->kl['key']) && $this->key === $this->kl['key'] && $this->key_length === $this->kl['key_length'] && $this->block_size === $this->kl['block_size']) { + // already expanded + return; + } + $this->kl = array('key' => $this->key, 'key_length' => $this->key_length, 'block_size' => $this->block_size); + + $this->Nk = $this->key_length >> 2; + // see Rijndael-ammended.pdf#page=44 + $this->Nr = max($this->Nk, $this->Nb) + 6; + + // shift offsets for Nb = 5, 7 are defined in Rijndael-ammended.pdf#page=44, + // "Table 8: Shift offsets in Shiftrow for the alternative block lengths" + // shift offsets for Nb = 4, 6, 8 are defined in Rijndael-ammended.pdf#page=14, + // "Table 2: Shift offsets for different block lengths" + switch ($this->Nb) { + case 4: + case 5: + case 6: + $this->c = array(0, 1, 2, 3); + break; + case 7: + $this->c = array(0, 1, 2, 4); + break; + case 8: + $this->c = array(0, 1, 3, 4); + } + + $w = array_values(unpack('N*words', $this->key)); + + $length = $this->Nb * ($this->Nr + 1); + for ($i = $this->Nk; $i < $length; $i++) { + $temp = $w[$i - 1]; + if ($i % $this->Nk == 0) { + // according to <http://php.net/language.types.integer>, "the size of an integer is platform-dependent". + // on a 32-bit machine, it's 32-bits, and on a 64-bit machine, it's 64-bits. on a 32-bit machine, + // 0xFFFFFFFF << 8 == 0xFFFFFF00, but on a 64-bit machine, it equals 0xFFFFFFFF00. as such, doing 'and' + // with 0xFFFFFFFF (or 0xFFFFFF00) on a 32-bit machine is unnecessary, but on a 64-bit machine, it is. + $temp = (($temp << 8) & 0xFFFFFF00) | (($temp >> 24) & 0x000000FF); // rotWord + $temp = $this->_subWord($temp) ^ $rcon[$i / $this->Nk]; + } elseif ($this->Nk > 6 && $i % $this->Nk == 4) { + $temp = $this->_subWord($temp); + } + $w[$i] = $w[$i - $this->Nk] ^ $temp; + } + + // convert the key schedule from a vector of $Nb * ($Nr + 1) length to a matrix with $Nr + 1 rows and $Nb columns + // and generate the inverse key schedule. more specifically, + // according to <http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=23> (section 5.3.3), + // "The key expansion for the Inverse Cipher is defined as follows: + // 1. Apply the Key Expansion. + // 2. Apply InvMixColumn to all Round Keys except the first and the last one." + // also, see fips-197.pdf#page=27, "5.3.5 Equivalent Inverse Cipher" + list($dt0, $dt1, $dt2, $dt3) = $this->_getInvTables(); + $temp = $this->w = $this->dw = array(); + for ($i = $row = $col = 0; $i < $length; $i++, $col++) { + if ($col == $this->Nb) { + if ($row == 0) { + $this->dw[0] = $this->w[0]; + } else { + // subWord + invMixColumn + invSubWord = invMixColumn + $j = 0; + while ($j < $this->Nb) { + $dw = $this->_subWord($this->w[$row][$j]); + $temp[$j] = $dt0[$dw >> 24 & 0x000000FF] ^ + $dt1[$dw >> 16 & 0x000000FF] ^ + $dt2[$dw >> 8 & 0x000000FF] ^ + $dt3[$dw & 0x000000FF]; + $j++; + } + $this->dw[$row] = $temp; + } + + $col = 0; + $row++; + } + $this->w[$row][$col] = $w[$i]; + } + + $this->dw[$row] = $this->w[$row]; + + // Converting to 1-dim key arrays (both ascending) + $this->dw = array_reverse($this->dw); + $w = array_pop($this->w); + $dw = array_pop($this->dw); + foreach ($this->w as $r => $wr) { + foreach ($wr as $c => $wc) { + $w[] = $wc; + $dw[] = $this->dw[$r][$c]; + } + } + $this->w = $w; + $this->dw = $dw; + } + + /** + * Performs S-Box substitutions + * + * @access private + * @param int $word + */ + function _subWord($word) + { + static $sbox; + if (empty($sbox)) { + list(, , , , $sbox) = $this->_getTables(); + } + + return $sbox[$word & 0x000000FF] | + ($sbox[$word >> 8 & 0x000000FF] << 8) | + ($sbox[$word >> 16 & 0x000000FF] << 16) | + ($sbox[$word >> 24 & 0x000000FF] << 24); + } + + /** + * Provides the mixColumns and sboxes tables + * + * @see Crypt_Rijndael:_encryptBlock() + * @see Crypt_Rijndael:_setupInlineCrypt() + * @see Crypt_Rijndael:_subWord() + * @access private + * @return array &$tables + */ + function &_getTables() + { + static $tables; + if (empty($tables)) { + // according to <http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=19> (section 5.2.1), + // precomputed tables can be used in the mixColumns phase. in that example, they're assigned t0...t3, so + // those are the names we'll use. + $t3 = array_map('intval', array( + // with array_map('intval', ...) we ensure we have only int's and not + // some slower floats converted by php automatically on high values + 0x6363A5C6, 0x7C7C84F8, 0x777799EE, 0x7B7B8DF6, 0xF2F20DFF, 0x6B6BBDD6, 0x6F6FB1DE, 0xC5C55491, + 0x30305060, 0x01010302, 0x6767A9CE, 0x2B2B7D56, 0xFEFE19E7, 0xD7D762B5, 0xABABE64D, 0x76769AEC, + 0xCACA458F, 0x82829D1F, 0xC9C94089, 0x7D7D87FA, 0xFAFA15EF, 0x5959EBB2, 0x4747C98E, 0xF0F00BFB, + 0xADADEC41, 0xD4D467B3, 0xA2A2FD5F, 0xAFAFEA45, 0x9C9CBF23, 0xA4A4F753, 0x727296E4, 0xC0C05B9B, + 0xB7B7C275, 0xFDFD1CE1, 0x9393AE3D, 0x26266A4C, 0x36365A6C, 0x3F3F417E, 0xF7F702F5, 0xCCCC4F83, + 0x34345C68, 0xA5A5F451, 0xE5E534D1, 0xF1F108F9, 0x717193E2, 0xD8D873AB, 0x31315362, 0x15153F2A, + 0x04040C08, 0xC7C75295, 0x23236546, 0xC3C35E9D, 0x18182830, 0x9696A137, 0x05050F0A, 0x9A9AB52F, + 0x0707090E, 0x12123624, 0x80809B1B, 0xE2E23DDF, 0xEBEB26CD, 0x2727694E, 0xB2B2CD7F, 0x75759FEA, + 0x09091B12, 0x83839E1D, 0x2C2C7458, 0x1A1A2E34, 0x1B1B2D36, 0x6E6EB2DC, 0x5A5AEEB4, 0xA0A0FB5B, + 0x5252F6A4, 0x3B3B4D76, 0xD6D661B7, 0xB3B3CE7D, 0x29297B52, 0xE3E33EDD, 0x2F2F715E, 0x84849713, + 0x5353F5A6, 0xD1D168B9, 0x00000000, 0xEDED2CC1, 0x20206040, 0xFCFC1FE3, 0xB1B1C879, 0x5B5BEDB6, + 0x6A6ABED4, 0xCBCB468D, 0xBEBED967, 0x39394B72, 0x4A4ADE94, 0x4C4CD498, 0x5858E8B0, 0xCFCF4A85, + 0xD0D06BBB, 0xEFEF2AC5, 0xAAAAE54F, 0xFBFB16ED, 0x4343C586, 0x4D4DD79A, 0x33335566, 0x85859411, + 0x4545CF8A, 0xF9F910E9, 0x02020604, 0x7F7F81FE, 0x5050F0A0, 0x3C3C4478, 0x9F9FBA25, 0xA8A8E34B, + 0x5151F3A2, 0xA3A3FE5D, 0x4040C080, 0x8F8F8A05, 0x9292AD3F, 0x9D9DBC21, 0x38384870, 0xF5F504F1, + 0xBCBCDF63, 0xB6B6C177, 0xDADA75AF, 0x21216342, 0x10103020, 0xFFFF1AE5, 0xF3F30EFD, 0xD2D26DBF, + 0xCDCD4C81, 0x0C0C1418, 0x13133526, 0xECEC2FC3, 0x5F5FE1BE, 0x9797A235, 0x4444CC88, 0x1717392E, + 0xC4C45793, 0xA7A7F255, 0x7E7E82FC, 0x3D3D477A, 0x6464ACC8, 0x5D5DE7BA, 0x19192B32, 0x737395E6, + 0x6060A0C0, 0x81819819, 0x4F4FD19E, 0xDCDC7FA3, 0x22226644, 0x2A2A7E54, 0x9090AB3B, 0x8888830B, + 0x4646CA8C, 0xEEEE29C7, 0xB8B8D36B, 0x14143C28, 0xDEDE79A7, 0x5E5EE2BC, 0x0B0B1D16, 0xDBDB76AD, + 0xE0E03BDB, 0x32325664, 0x3A3A4E74, 0x0A0A1E14, 0x4949DB92, 0x06060A0C, 0x24246C48, 0x5C5CE4B8, + 0xC2C25D9F, 0xD3D36EBD, 0xACACEF43, 0x6262A6C4, 0x9191A839, 0x9595A431, 0xE4E437D3, 0x79798BF2, + 0xE7E732D5, 0xC8C8438B, 0x3737596E, 0x6D6DB7DA, 0x8D8D8C01, 0xD5D564B1, 0x4E4ED29C, 0xA9A9E049, + 0x6C6CB4D8, 0x5656FAAC, 0xF4F407F3, 0xEAEA25CF, 0x6565AFCA, 0x7A7A8EF4, 0xAEAEE947, 0x08081810, + 0xBABAD56F, 0x787888F0, 0x25256F4A, 0x2E2E725C, 0x1C1C2438, 0xA6A6F157, 0xB4B4C773, 0xC6C65197, + 0xE8E823CB, 0xDDDD7CA1, 0x74749CE8, 0x1F1F213E, 0x4B4BDD96, 0xBDBDDC61, 0x8B8B860D, 0x8A8A850F, + 0x707090E0, 0x3E3E427C, 0xB5B5C471, 0x6666AACC, 0x4848D890, 0x03030506, 0xF6F601F7, 0x0E0E121C, + 0x6161A3C2, 0x35355F6A, 0x5757F9AE, 0xB9B9D069, 0x86869117, 0xC1C15899, 0x1D1D273A, 0x9E9EB927, + 0xE1E138D9, 0xF8F813EB, 0x9898B32B, 0x11113322, 0x6969BBD2, 0xD9D970A9, 0x8E8E8907, 0x9494A733, + 0x9B9BB62D, 0x1E1E223C, 0x87879215, 0xE9E920C9, 0xCECE4987, 0x5555FFAA, 0x28287850, 0xDFDF7AA5, + 0x8C8C8F03, 0xA1A1F859, 0x89898009, 0x0D0D171A, 0xBFBFDA65, 0xE6E631D7, 0x4242C684, 0x6868B8D0, + 0x4141C382, 0x9999B029, 0x2D2D775A, 0x0F0F111E, 0xB0B0CB7B, 0x5454FCA8, 0xBBBBD66D, 0x16163A2C + )); + + foreach ($t3 as $t3i) { + $t0[] = (($t3i << 24) & 0xFF000000) | (($t3i >> 8) & 0x00FFFFFF); + $t1[] = (($t3i << 16) & 0xFFFF0000) | (($t3i >> 16) & 0x0000FFFF); + $t2[] = (($t3i << 8) & 0xFFFFFF00) | (($t3i >> 24) & 0x000000FF); + } + + $tables = array( + // The Precomputed mixColumns tables t0 - t3 + $t0, + $t1, + $t2, + $t3, + // The SubByte S-Box + array( + 0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76, + 0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0, + 0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15, + 0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75, + 0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84, + 0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF, + 0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8, + 0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2, + 0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73, + 0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB, + 0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79, + 0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08,
[... 269 lines stripped ...]
