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- <?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 <terrafrost@php.net>
- * @copyright MMVIII Jim Wigginton
- * @license http://www.opensource.org/licenses/mit-license.html MIT License
- * @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 <terrafrost@php.net>
- * @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;
- /**
- * The SubByte S-Box
- *
- * @see Crypt_Rijndael::_encryptBlock()
- * @var Array
- * @access private
- */
- var $sbox;
- /**
- * The inverse SubByte S-Box
- *
- * @see Crypt_Rijndael::_decryptBlock()
- * @var Array
- * @access private
- */
- var $isbox;
- /**
- * Performance-optimized callback function for en/decrypt()
- *
- * @see Crypt_Rijndael::encrypt()
- * @see Crypt_Rijndael::decrypt()
- * @see Crypt_Rijndael::inline_crypt_setup()
- * @see Crypt_Rijndael::$use_inline_crypt
- * @var Callback
- * @access private
- */
- var $inline_crypt;
- /**
- * Holds whether performance-optimized $inline_crypt should be used or not.
- *
- * @see Crypt_Rijndael::Crypt_Rijndael()
- * @see Crypt_Rijndael::inline_crypt_setup()
- * @see Crypt_Rijndael::$inline_crypt
- * @var Boolean
- * @access private
- */
- var $use_inline_crypt = true;
- /**
- * 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' => '', 'pos' => 0);
- /**
- * Decryption buffer for CTR, OFB and CFB modes
- *
- * @see Crypt_Rijndael::decrypt()
- * @var String
- * @access private
- */
- var $debuffer = array('ciphertext' => '', 'xor' => '', 'pos' => 0);
- /**
- * 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++) {
- $t2[] = (($t3[$i] << 8) & 0xFFFFFF00) | (($t3[$i] >> 24) & 0x000000FF);
- $t1[] = (($t3[$i] << 16) & 0xFFFF0000) | (($t3[$i] >> 16) & 0x0000FFFF);
- $t0[] = (($t3[$i] << 24) & 0xFF000000) | (($t3[$i] >> 8) & 0x00FFFFFF);
- $dt2[] = (($dt3[$i] << 8) & 0xFFFFFF00) | (($dt3[$i] >> 24) & 0x000000FF);
- $dt1[] = (($dt3[$i] << 16) & 0xFFFF0000) | (($dt3[$i] >> 16) & 0x0000FFFF);
- $dt0[] = (($dt3[$i] << 24) & 0xFF000000) | (($dt3[$i] >> 8) & 0x00FFFFFF);
- }
- // sbox for the S-Box substitution
- $this->sbox = 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
- );
- // sbox for the inverse S-Box substitution
- $this->isbox = 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
- );
- if (!function_exists('create_function') || !is_callable('create_function')) {
- $this->use_inline_crypt = false;
- }
- }
- /**
- * 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 than 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 password.
- *
- * Depending on what $method is set to, setPassword()'s (optional) parameters are as follows:
- * {@link http://en.wikipedia.org/wiki/PBKDF2 pbkdf2}:
- * $hash, $salt, $method
- * Set $dkLen by calling setKeyLength()
- *
- * @param String $password
- * @param optional String $method
- * @access public
- */
- function setPassword($password, $method = 'pbkdf2')
- {
- $key = '';
- switch ($method) {
- default: // 'pbkdf2'
- list(, , $hash, $salt, $count) = func_get_args();
- if (!isset($hash)) {
- $hash = 'sha1';
- }
- // WPA and WPA2 use the SSID as the salt
- if (!isset($salt)) {
- $salt = 'phpseclib';
- }
- // RFC2898#section-4.2 uses 1,000 iterations by default
- // WPA and WPA2 use 4,096.
- if (!isset($count)) {
- $count = 1000;
- }
- if (!class_exists('Crypt_Hash')) {
- require_once('Crypt/Hash.php');
- }
- $i = 1;
- while (strlen($key) < $this->key_size) { // $dkLen == $this->key_size
- //$dk.= $this->_pbkdf($password, $salt, $count, $i++);
- $hmac = new Crypt_Hash();
- $hmac->setHash($hash);
- $hmac->setKey($password);
- $f = $u = $hmac->hash($salt . pack('N', $i++));
- for ($j = 2; $j <= $count; $j++) {
- $u = $hmac->hash($u);
- $f^= $u;
- }
- $key.= $f;
- }
- }
- $this->setKey(substr($key, 0, $this->key_size));
- }
- /**
- * 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 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)
- {
- if ($this->changed) {
- $this->_setup();
- }
- if ($this->use_inline_crypt) {
- $inline = $this->inline_crypt;
- return $inline('encrypt', $this, $plaintext);
- }
- if ($this->paddable) {
- $plaintext = $this->_pad($plaintext);
- }
- $block_size = $this->block_size;
- $buffer = &$this->enbuffer;
- $ciphertext = '';
- switch ($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 = $this->encryptIV;
- if (strlen($buffer['encrypted'])) {
- for ($i = 0; $i < strlen($plaintext); $i+=$block_size) {
- $block = substr($plaintext, $i, $block_size);
- if (strlen($block) > strlen($buffer['encrypted'])) {
- $buffer['encrypted'].= $this->_encryptBlock($this->_generate_xor($block_size, $xor));
- }
- $key = $this->_string_shift($buffer['encrypted'], $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) {
- $buffer['encrypted'] = substr($key, $start) . $buffer['encrypted'];
- }
- }
- break;
- case CRYPT_RIJNDAEL_MODE_CFB:
- // cfb loosely routines inspired by openssl's:
- // http://cvs.openssl.org/fileview?f=openssl/crypto/modes/cfb128.c&v=1.3.2.2.2.1
- if ($this->continuousBuffer) {
- $iv = &$this->encryptIV;
- $pos = &$buffer['pos'];
- } else {
- $iv = $this->encryptIV;
- $pos = 0;
- }
- $len = strlen($plaintext);
- $i = 0;
- if ($pos) {
- $orig_pos = $pos;
- $max = $block_size - $pos;
- if ($len >= $max) {
- $i = $max;
- $len-= $max;
- $pos = 0;
- } else {
- $i = $len;
- $pos+= $len;
- $len = 0;
- }
- // ie. $i = min($max, $len), $len-= $i, $pos+= $i, $pos%= $blocksize
- $ciphertext = substr($iv, $orig_pos) ^ $plaintext;
- $iv = substr_replace($iv, $ciphertext, $orig_pos, $i);
- }
- while ($len >= $block_size) {
- $iv = $this->_encryptBlock($iv) ^ substr($plaintext, $i, $block_size);
- $ciphertext.= $iv;
- $len-= $block_size;
- $i+= $block_size;
- }
- if ($len) {
- $iv = $this->_encryptBlock($iv);
- $block = $iv ^ substr($plaintext, $i);
- $iv = substr_replace($iv, $block, 0, $len);
- $ciphertext.= $block;
- $pos = $len;
- }
- break;
- case CRYPT_RIJNDAEL_MODE_OFB:
- $xor = $this->encryptIV;
- if (strlen($buffer['xor'])) {
- for ($i = 0; $i < strlen($plaintext); $i+=$block_size) {
- $block = substr($plaintext, $i, $block_size);
- if (strlen($block) > strlen($buffer['xor'])) {
- $xor = $this->_encryptBlock($xor);
- $buffer['xor'].= $xor;
- }
- $key = $this->_string_shift($buffer['xor'], $block_size);
- $ciphertext.= $block ^ $key;
- }
- } else {
- for ($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) {
- $buffer['xor'] = substr($key, $start) . $buffer['xor'];
- }
- }
- }
- 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)
- {
- if ($this->changed) {
- $this->_setup();
- }
- if ($this->use_inline_crypt) {
- $inline = $this->inline_crypt;
- return $inline('decrypt', $this, $ciphertext);
- }
- if ($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;
- $plaintext = '';
- switch ($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['ciphertext'])) {
- for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) {
- $block = substr($ciphertext, $i, $block_size);
- if (strlen($block) > strlen($buffer['ciphertext'])) {
- $buffer['ciphertext'].= $this->_encryptBlock($this->_generate_xor($block_size, $xor));
- }
- $key = $this->_string_shift($buffer['ciphertext'], $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) {
- $buffer['ciphertext'] = substr($key, $start) . $buffer['ciphertext'];
- }
- }
- break;
- case CRYPT_RIJNDAEL_MODE_CFB:
- if ($this->continuousBuffer) {
- $iv = &$this->decryptIV;
- $pos = &$buffer['pos'];
- } else {
- $iv = $this->decryptIV;
- $pos = 0;
- }
- $len = strlen($ciphertext);
- $i = 0;
- if ($pos) {
- $orig_pos = $pos;
- $max = $block_size - $pos;
- if ($len >= $max) {
- $i = $max;
- $len-= $max;
- $pos = 0;
- } else {
- $i = $len;
- $pos+= $len;
- $len = 0;
- }
- // ie. $i = min($max, $len), $len-= $i, $pos+= $i, $pos%= $blocksize
- $plaintext = substr($iv, $orig_pos) ^ $ciphertext;
- $iv = substr_replace($iv, substr($ciphertext, 0, $i), $orig_pos, $i);
- }
- while ($len >= $block_size) {
- $iv = $this->_encryptBlock($iv);
- $cb = substr($ciphertext, $i, $block_size);
- $plaintext.= $iv ^ $cb;
- $iv = $cb;
- $len-= $block_size;
- $i+= $block_size;
- }
- if ($len) {
- $iv = $this->_encryptBlock($iv);
- $plaintext.= $iv ^ substr($ciphertext, $i);
- $iv = substr_replace($iv, substr($ciphertext, $i), 0, $len);
- $pos = $len;
- }
- break;
- case CRYPT_RIJNDAEL_MODE_OFB:
- $xor = $this->decryptIV;
- if (strlen($buffer['xor'])) {
- for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) {
- $block = substr($ciphertext, $i, $block_size);
- if (strlen($block) > strlen($buffer['xor'])) {
- $xor = $this->_encryptBlock($xor);
- $buffer['xor'].= $xor;
- }
- $key = $this->_string_shift($buffer['xor'], $block_size);
- $plaintext.= $block ^ $key;
- }
- } else {
- for ($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) {
- $buffer['xor'] = substr($key, $start) . $buffer['xor'];
- }
- }
- }
- 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
- $i = -1;
- foreach ($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 < $Nb) {
- $temp[$i] = $t0[$state[$i] >> 24 & 0x000000FF] ^
- $t1[$state[$j] >> 16 & 0x000000FF] ^
- $t2[$state[$k] >> 8 & 0x000000FF] ^
- $t3[$state[$l] & 0x000000FF] ^
- $w[$round][$i];
- ++$i;
- $j = ($j + 1) % $Nb;
- $k = ($k + 1) % $Nb;
- $l = ($l + 1) % $Nb;
- }
- $state = $temp;
- }
- // subWord
- for ($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 < $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) % $Nb;
- }
- // 100% ugly switch/case code... but ~5% faster ("smart code" below commented out)
- switch ($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]);
- }
- /*
- $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);
- $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
- $i = -1;
- foreach ($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] >> 24 & 0x000000FF] ^
- $dt1[$state[$j] >> 16 & 0x000000FF] ^
- $dt2[$state[$k] >> 8 & 0x000000FF] ^
- $dt3[$state[$l] & 0x000000FF] ^
- $dw[$round][$i];
- ++$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) {
- $temp[$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) % $Nb;
- }
- switch ($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]);
- }
- /*
- $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->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 = $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] = $this->dt0[$dw >> 24 & 0x000000FF] ^
- $this->dt1[$dw >> 16 & 0x000000FF] ^
- $this->dt2[$dw >> 8 & 0x000000FF] ^
- $this->dt3[$dw & 0x000000FF];
- $j++;
- }
- $this->dw[$row] = $temp;
- }
- $col = 0;
- $row++;
- }
- $this->w[$row][$col] = $w[$i];
- }
- $this->dw[$row] = $this->w[$row];
- // In case of $this->use_inline_crypt === true we have to use 1-dim key arrays (both ascending)
- if ($this->use_inline_crypt) {
- $this->dw = array_reverse($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;
- $this->inline_crypt_setup();
- }
- $this->changed = false;
- }
- /**
- * Performs S-Box substitutions
- *
- * @access private
- */
- function _subWord($word)
- {
- $sbox = $this->sbox;
- return $sbox[$word & 0x000000FF] |
- ($sbox[$word >> 8 & 0x000000FF] << 8) |
- ($sbox[$word >> 16 & 0x000000FF] << 16) |
- ($sbox[$word >> 24 & 0x000000FF] << 24);
- }
- /**
- * Performs inverse S-Box substitutions
- *
- * @access private
- */
- function _invSubWord($word)
- {
- $isbox = $this->isbox;
- return $isbox[$word & 0x000000FF] |
- ($isbox[$word >> 8 & 0x000000FF] << 8) |
- ($isbox[$word >> 16 & 0x000000FF] << 16) |
- ($isbox[$word >> 24 & 0x000000FF] << 24);
- }
- /**
- * 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})");
- $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;
- $this->enbuffer = array('encrypted' => '', 'xor' => '', 'pos' => 0);
- $this->debuffer = array('ciphertext' => '', 'xor' => '', 'pos' => 0);
- }
- /**
- * 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;
- }
- /**
- * Creates performance-optimized function for de/encrypt(), storing it in $this->inline_crypt
- *
- * @see Crypt_Rijndael::encrypt()
- * @see Crypt_Rijndael::decrypt()
- * @access private
- */
- function inline_crypt_setup()
- {
- // Note: inline_crypt_setup() will be called only if $this->changed === true
- // So here we are'nt under the same heavy timing-stress as we are in _de/encryptBlock() or de/encrypt().
- // However...the here generated function- $code, stored as php callback in $this->inline_crypt, must work as fast as even possible.
- $lambda_functions =& Crypt_Rijndael::get_lambda_functions();
- $block_size = $this->block_size;
- $mode = $this->mode;
- // The first 5 generated $lambda_functions will use the key-words hardcoded for better performance.
- // For memory reason we limit those ultra-optimized function code to 5.
- // After that, we use pure (extracted) integer vars for the key-words which is faster than accessing them via array.
- if (count($lambda_functions) < 5) {
- $w = $this->w;
- $dw = $this->dw;
- $init_encryptBlock = '';
- $init_decryptBlock = '';
- } else {
- for ($i = 0, $cw = count($this->w); $i < $cw; ++$i) {
- $w[] = '$w_'.$i;
- $dw[] = '$dw_'.$i;
- }
- $init_encryptBlock = 'extract($self->w, EXTR_PREFIX_ALL, "w");';
- $init_decryptBlock = 'extract($self->dw, EXTR_PREFIX_ALL, "dw");';
- }
- $code_hash = md5("$mode, $block_size, " . implode(',', $w));
- if (!isset($lambda_functions[$code_hash])) {
- $Nr = $this->Nr;
- $Nb = $this->Nb;
- $c = $this->c;
- // Generating encrypt code:
- $init_encryptBlock.= '
- $t0 = $self->t0;
- $t1 = $self->t1;
- $t2 = $self->t2;
- $t3 = $self->t3;
- $sbox = $self->sbox;';
- $s = 'e';
- $e = 's';
- $wc = $Nb - 1;
- // Preround: addRoundKey
- $_encryptBlock = '$in = unpack("N*", $in);'."\n";
- for ($i = 0; $i < $Nb; ++$i) {
- $_encryptBlock .= '$s'.$i.' = $in['.($i + 1).'] ^ '.$w[++$wc].";\n";
- }
- // Mainrounds: shiftRows + subWord + mixColumns + addRoundKey
- for ($round = 1; $round < $Nr; ++$round) {
- list($s, $e) = array($e, $s);
- for ($i = 0; $i < $Nb; ++$i) {
- $_encryptBlock.=
- '$'.$e.$i.' =
- $t0[($'.$s.$i .' >> 24) & 0xff] ^
- $t1[($'.$s.(($i + $c[1]) % $Nb).' >> 16) & 0xff] ^
- $t2[($'.$s.(($i + $c[2]) % $Nb).' >> 8) & 0xff] ^
- $t3[ $'.$s.(($i + $c[3]) % $Nb).' & 0xff] ^
- '.$w[++$wc].";\n";
- }
- }
- // Finalround: subWord + shiftRows + addRoundKey
- for ($i = 0; $i < $Nb; ++$i) {
- $_encryptBlock.=
- '$'.$e.$i.' =
- $sbox[ $'.$e.$i.' & 0xff] |
- ($sbox[($'.$e.$i.' >> 8) & 0xff] << 8) |
- ($sbox[($'.$e.$i.' >> 16) & 0xff] << 16) |
- ($sbox[($'.$e.$i.' >> 24) & 0xff] << 24);'."\n";
- }
- $_encryptBlock .= '$in = pack("N*"'."\n";
- for ($i = 0; $i < $Nb; ++$i) {
- $_encryptBlock.= ',
- ($'.$e.$i .' & 0xFF000000) ^
- ($'.$e.(($i + $c[1]) % $Nb).' & 0x00FF0000) ^
- ($'.$e.(($i + $c[2]) % $Nb).' & 0x0000FF00) ^
- ($'.$e.(($i + $c[3]) % $Nb).' & 0x000000FF) ^
- '.$w[$i]."\n";
- }
- $_encryptBlock .= ');';
- // Generating decrypt code:
- $init_decryptBlock.= '
- $dt0 = $self->dt0;
- $dt1 = $self->dt1;
- $dt2 = $self->dt2;
- $dt3 = $self->dt3;
- $isbox = $self->isbox;';
- $s = 'e';
- $e = 's';
- $wc = $Nb - 1;
- // Preround: addRoundKey
- $_decryptBlock = '$in = unpack("N*", $in);'."\n";
- for ($i = 0; $i < $Nb; ++$i) {
- $_decryptBlock .= '$s'.$i.' = $in['.($i + 1).'] ^ '.$dw[++$wc].';'."\n";
- }
- // Mainrounds: shiftRows + subWord + mixColumns + addRoundKey
- for ($round = 1; $round < $Nr; ++$round) {
- list($s, $e) = array($e, $s);
- for ($i = 0; $i < $Nb; ++$i) {
- $_decryptBlock.=
- '$'.$e.$i.' =
- $dt0[($'.$s.$i .' >> 24) & 0xff] ^
- $dt1[($'.$s.(($Nb + $i - $c[1]) % $Nb).' >> 16) & 0xff] ^
- $dt2[($'.$s.(($Nb + $i - $c[2]) % $Nb).' >> 8) & 0xff] ^
- $dt3[ $'.$s.(($Nb + $i - $c[3]) % $Nb).' & 0xff] ^
- '.$dw[++$wc].";\n";
- }
- }
- // Finalround: subWord + shiftRows + addRoundKey
- for ($i = 0; $i < $Nb; ++$i) {
- $_decryptBlock.=
- '$'.$e.$i.' =
- $isbox[ $'.$e.$i.' & 0xff] |
- ($isbox[($'.$e.$i.' >> 8) & 0xff] << 8) |
- ($isbox[($'.$e.$i.' >> 16) & 0xff] << 16) |
- ($isbox[($'.$e.$i.' >> 24) & 0xff] << 24);'."\n";
- }
- $_decryptBlock .= '$in = pack("N*"'."\n";
- for ($i = 0; $i < $Nb; ++$i) {
- $_decryptBlock.= ',
- ($'.$e.$i. ' & 0xFF000000) ^
- ($'.$e.(($Nb + $i - $c[1]) % $Nb).' & 0x00FF0000) ^
- ($'.$e.(($Nb + $i - $c[2]) % $Nb).' & 0x0000FF00) ^
- ($'.$e.(($Nb + $i - $c[3]) % $Nb).' & 0x000000FF) ^
- '.$dw[$i]."\n";
- }
- $_decryptBlock .= ');';
- // Generating mode of operation code:
- switch ($mode) {
- case CRYPT_RIJNDAEL_MODE_ECB:
- $encrypt = $init_encryptBlock . '
- $ciphertext = "";
- $text = $self->_pad($text);
- $plaintext_len = strlen($text);
- for ($i = 0; $i < $plaintext_len; $i+= '.$block_size.') {
- $in = substr($text, $i, '.$block_size.');
- '.$_encryptBlock.'
- $ciphertext.= $in;
- }
-
- return $ciphertext;
- ';
- $decrypt = $init_decryptBlock . '
- $plaintext = "";
- $text = str_pad($text, strlen($text) + ('.$block_size.' - strlen($text) % '.$block_size.') % '.$block_size.', chr(0));
- $ciphertext_len = strlen($text);
- for ($i = 0; $i < $ciphertext_len; $i+= '.$block_size.') {
- $in = substr($text, $i, '.$block_size.');
- '.$_decryptBlock.'
- $plaintext.= $in;
- }
- return $self->_unpad($plaintext);
- ';
- break;
- case CRYPT_RIJNDAEL_MODE_CBC:
- $encrypt = $init_encryptBlock . '
- $ciphertext = "";
- $text = $self->_pad($text);
- $plaintext_len = strlen($text);
- $in = $self->encryptIV;
- for ($i = 0; $i < $plaintext_len; $i+= '.$block_size.') {
- $in = substr($text, $i, '.$block_size.') ^ $in;
- '.$_encryptBlock.'
- $ciphertext.= $in;
- }
- if ($self->continuousBuffer) {
- $self->encryptIV = $in;
- }
- return $ciphertext;
- ';
- $decrypt = $init_decryptBlock . '
- $plaintext = "";
- $text = str_pad($text, strlen($text) + ('.$block_size.' - strlen($text) % '.$block_size.') % '.$block_size.', chr(0));
- $ciphertext_len = strlen($text);
- $iv = $self->decryptIV;
- for ($i = 0; $i < $ciphertext_len; $i+= '.$block_size.') {
- $in = $block = substr($text, $i, '.$block_size.');
- '.$_decryptBlock.'
- $plaintext.= $in ^ $iv;
- $iv = $block;
- }
- if ($self->continuousBuffer) {
- $self->decryptIV = $iv;
- }
- return $self->_unpad($plaintext);
- ';
- break;
- case CRYPT_RIJNDAEL_MODE_CTR:
- $encrypt = $init_encryptBlock . '
- $ciphertext = "";
- $plaintext_len = strlen($text);
- $xor = $self->encryptIV;
- $buffer = &$self->enbuffer;
- if (strlen($buffer["encrypted"])) {
- for ($i = 0; $i < $plaintext_len; $i+= '.$block_size.') {
- $block = substr($text, $i, '.$block_size.');
- if (strlen($block) > strlen($buffer["encrypted"])) {
- $in = $self->_generate_xor('.$block_size.', $xor);
- '.$_encryptBlock.'
- $buffer["encrypted"].= $in;
- }
- $key = $self->_string_shift($buffer["encrypted"], '.$block_size.');
- $ciphertext.= $block ^ $key;
- }
- } else {
- for ($i = 0; $i < $plaintext_len; $i+= '.$block_size.') {
- $block = substr($text, $i, '.$block_size.');
- $in = $self->_generate_xor('.$block_size.', $xor);
- '.$_encryptBlock.'
- $key = $in;
- $ciphertext.= $block ^ $key;
- }
- }
- if ($self->continuousBuffer) {
- $self->encryptIV = $xor;
- if ($start = $plaintext_len % '.$block_size.') {
- $buffer["encrypted"] = substr($key, $start) . $buffer["encrypted"];
- }
- }
- return $ciphertext;
- ';
- $decrypt = $init_encryptBlock . '
- $plaintext = "";
- $ciphertext_len = strlen($text);
- $xor = $self->decryptIV;
- $buffer = &$self->debuffer;
- if (strlen($buffer["ciphertext"])) {
- for ($i = 0; $i < $ciphertext_len; $i+= '.$block_size.') {
- $block = substr($text, $i, '.$block_size.');
- if (strlen($block) > strlen($buffer["ciphertext"])) {
- $in = $self->_generate_xor('.$block_size.', $xor);
- '.$_encryptBlock.'
- $buffer["ciphertext"].= $in;
- }
- $key = $self->_string_shift($buffer["ciphertext"], '.$block_size.');
- $plaintext.= $block ^ $key;
- }
- } else {
- for ($i = 0; $i < $ciphertext_len; $i+= '.$block_size.') {
- $block = substr($text, $i, '.$block_size.');
- $in = $self->_generate_xor('.$block_size.', $xor);
- '.$_encryptBlock.'
- $key = $in;
- $plaintext.= $block ^ $key;
- }
- }
- if ($self->continuousBuffer) {
- $self->decryptIV = $xor;
- if ($start = $ciphertext_len % '.$block_size.') {
- $buffer["ciphertext"] = substr($key, $start) . $buffer["ciphertext"];
- }
- }
-
- return $plaintext;
- ';
- break;
- case CRYPT_RIJNDAEL_MODE_CFB:
- $encrypt = $init_encryptBlock . '
- $ciphertext = "";
- $buffer = &$self->enbuffer;
- if ($self->continuousBuffer) {
- $iv = &$self->encryptIV;
- $pos = &$buffer["pos"];
- } else {
- $iv = $self->encryptIV;
- $pos = 0;
- }
- $len = strlen($text);
- $i = 0;
- if ($pos) {
- $orig_pos = $pos;
- $max = '.$block_size.' - $pos;
- if ($len >= $max) {
- $i = $max;
- $len-= $max;
- $pos = 0;
- } else {
- $i = $len;
- $pos+= $len;
- $len = 0;
- }
- $ciphertext = substr($iv, $orig_pos) ^ $text;
- $iv = substr_replace($iv, $ciphertext, $orig_pos, $i);
- }
- while ($len >= '.$block_size.') {
- $in = $iv;
- '.$_encryptBlock.';
- $iv = $in ^ substr($text, $i, '.$block_size.');
- $ciphertext.= $iv;
- $len-= '.$block_size.';
- $i+= '.$block_size.';
- }
- if ($len) {
- $in = $iv;
- '.$_encryptBlock.'
- $iv = $in;
- $block = $iv ^ substr($text, $i);
- $iv = substr_replace($iv, $block, 0, $len);
- $ciphertext.= $block;
- $pos = $len;
- }
- return $ciphertext;
- ';
- $decrypt = $init_encryptBlock . '
- $plaintext = "";
- $buffer = &$self->debuffer;
- if ($self->continuousBuffer) {
- $iv = &$self->decryptIV;
- $pos = &$buffer["pos"];
- } else {
- $iv = $self->decryptIV;
- $pos = 0;
- }
- $len = strlen($text);
- $i = 0;
- if ($pos) {
- $orig_pos = $pos;
- $max = '.$block_size.' - $pos;
- if ($len >= $max) {
- $i = $max;
- $len-= $max;
- $pos = 0;
- } else {
- $i = $len;
- $pos+= $len;
- $len = 0;
- }
- $plaintext = substr($iv, $orig_pos) ^ $text;
- $iv = substr_replace($iv, substr($text, 0, $i), $orig_pos, $i);
- }
- while ($len >= '.$block_size.') {
- $in = $iv;
- '.$_encryptBlock.'
- $iv = $in;
- $cb = substr($text, $i, '.$block_size.');
- $plaintext.= $iv ^ $cb;
- $iv = $cb;
- $len-= '.$block_size.';
- $i+= '.$block_size.';
- }
- if ($len) {
- $in = $iv;
- '.$_encryptBlock.'
- $iv = $in;
- $plaintext.= $iv ^ substr($text, $i);
- $iv = substr_replace($iv, substr($text, $i), 0, $len);
- $pos = $len;
- }
- return $plaintext;
- ';
- break;
- case CRYPT_RIJNDAEL_MODE_OFB:
- $encrypt = $init_encryptBlock . '
- $ciphertext = "";
- $plaintext_len = strlen($text);
- $xor = $self->encryptIV;
- $buffer = &$self->enbuffer;
- if (strlen($buffer["xor"])) {
- for ($i = 0; $i < $plaintext_len; $i+= '.$block_size.') {
- $block = substr($text, $i, '.$block_size.');
- if (strlen($block) > strlen($buffer["xor"])) {
- $in = $xor;
- '.$_encryptBlock.'
- $xor = $in;
- $buffer["xor"].= $xor;
- }
- $key = $self->_string_shift($buffer["xor"], '.$block_size.');
- $ciphertext.= $block ^ $key;
- }
- } else {
- for ($i = 0; $i < $plaintext_len; $i+= '.$block_size.') {
- $in = $xor;
- '.$_encryptBlock.'
- $xor = $in;
- $ciphertext.= substr($text, $i, '.$block_size.') ^ $xor;
- }
- $key = $xor;
- }
- if ($self->continuousBuffer) {
- $self->encryptIV = $xor;
- if ($start = $plaintext_len % '.$block_size.') {
- $buffer["xor"] = substr($key, $start) . $buffer["xor"];
- }
- }
- return $ciphertext;
- ';
- $decrypt = $init_encryptBlock . '
- $plaintext = "";
- $ciphertext_len = strlen($text);
- $xor = $self->decryptIV;
- $buffer = &$self->debuffer;
- if (strlen($buffer["xor"])) {
- for ($i = 0; $i < $ciphertext_len; $i+= '.$block_size.') {
- $block = substr($text, $i, '.$block_size.');
- if (strlen($block) > strlen($buffer["xor"])) {
- $in = $xor;
- '.$_encryptBlock.'
- $xor = $in;
- $buffer["xor"].= $xor;
- }
- $key = $self->_string_shift($buffer["xor"], '.$block_size.');
- $plaintext.= $block ^ $key;
- }
- } else {
- for ($i = 0; $i < $ciphertext_len; $i+= '.$block_size.') {
- $in = $xor;
- '.$_encryptBlock.'
- $xor = $in;
- $plaintext.= substr($text, $i, '.$block_size.') ^ $xor;
- }
- $key = $xor;
- }
- if ($self->continuousBuffer) {
- $self->decryptIV = $xor;
- if ($start = $ciphertext_len % '.$block_size.') {
- $buffer["xor"] = substr($key, $start) . $buffer["xor"];
- }
- }
- return $plaintext;
- ';
- break;
- }
- $lambda_functions[$code_hash] = create_function('$action, &$self, $text', 'if ($action == "encrypt") { '.$encrypt.' } else { '.$decrypt.' }');
- }
- $this->inline_crypt = $lambda_functions[$code_hash];
- }
- /**
- * Holds the lambda_functions table (classwide)
- *
- * @see Crypt_Rijndael::inline_crypt_setup()
- * @return Array
- * @access private
- */
- function &get_lambda_functions()
- {
- static $functions = array();
- return $functions;
- }
- }
- // vim: ts=4:sw=4:et:
- // vim6: fdl=1:
|