<?php

[0] Fix | Delete

[1] Fix | Delete

/**

[2] Fix | Delete

* Pure-PHP implementation of RC2.

[3] Fix | Delete

*

[4] Fix | Delete

* Uses mcrypt, if available, and an internal implementation, otherwise.

[5] Fix | Delete

*

[6] Fix | Delete

* PHP versions 4 and 5

[7] Fix | Delete

*

[8] Fix | Delete

* Useful resources are as follows:

[9] Fix | Delete

*

[10] Fix | Delete

* - {@link http://tools.ietf.org/html/rfc2268}

[11] Fix | Delete

*

[12] Fix | Delete

* Here's a short example of how to use this library:

[13] Fix | Delete

* <code>

[14] Fix | Delete

* <?php

[15] Fix | Delete

* include 'Crypt/RC2.php';

[16] Fix | Delete

*

[17] Fix | Delete

* $rc2 = new Crypt_RC2();

[18] Fix | Delete

*

[19] Fix | Delete

* $rc2->setKey('abcdefgh');

[20] Fix | Delete

*

[21] Fix | Delete

* $plaintext = str_repeat('a', 1024);

[22] Fix | Delete

*

[23] Fix | Delete

* echo $rc2->decrypt($rc2->encrypt($plaintext));

[24] Fix | Delete

* ?>

[25] Fix | Delete

* </code>

[26] Fix | Delete

*

[27] Fix | Delete

* LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy

[28] Fix | Delete

* of this software and associated documentation files (the "Software"), to deal

[29] Fix | Delete

* in the Software without restriction, including without limitation the rights

[30] Fix | Delete

* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

[31] Fix | Delete

* copies of the Software, and to permit persons to whom the Software is

[32] Fix | Delete

* furnished to do so, subject to the following conditions:

[33] Fix | Delete

*

[34] Fix | Delete

* The above copyright notice and this permission notice shall be included in

[35] Fix | Delete

* all copies or substantial portions of the Software.

[36] Fix | Delete

*

[37] Fix | Delete

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

[38] Fix | Delete

* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

[39] Fix | Delete

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

[40] Fix | Delete

* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

[41] Fix | Delete

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

[42] Fix | Delete

* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

[43] Fix | Delete

* THE SOFTWARE.

[44] Fix | Delete

*

[45] Fix | Delete

* @category Crypt

[46] Fix | Delete

* @package Crypt_RC2

[47] Fix | Delete

* @author Patrick Monnerat <pm@datasphere.ch>

[48] Fix | Delete

* @license http://www.opensource.org/licenses/mit-license.html MIT License

[49] Fix | Delete

* @link http://phpseclib.sourceforge.net

[50] Fix | Delete

*/

[51] Fix | Delete

[52] Fix | Delete

/**

[53] Fix | Delete

* Include Crypt_Base

[54] Fix | Delete

*

[55] Fix | Delete

* Base cipher class

[56] Fix | Delete

*/

[57] Fix | Delete

if (!class_exists('Crypt_Base')) {

[58] Fix | Delete

require_once dirname(__FILE__).'/Base.php';

[59] Fix | Delete

}

[60] Fix | Delete

[61] Fix | Delete

/**#@+

[62] Fix | Delete

* @access public

[63] Fix | Delete

* @see Crypt_RC2::encrypt()

[64] Fix | Delete

* @see Crypt_RC2::decrypt()

[65] Fix | Delete

*/

[66] Fix | Delete

/**

[67] Fix | Delete

* Encrypt / decrypt using the Counter mode.

[68] Fix | Delete

*

[69] Fix | Delete

* Set to -1 since that's what Crypt/Random.php uses to index the CTR mode.

[70] Fix | Delete

*

[71] Fix | Delete

* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Counter_.28CTR.29

[72] Fix | Delete

*/

[73] Fix | Delete

define('CRYPT_RC2_MODE_CTR', CRYPT_MODE_CTR);

[74] Fix | Delete

/**

[75] Fix | Delete

* Encrypt / decrypt using the Electronic Code Book mode.

[76] Fix | Delete

*

[77] Fix | Delete

* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Electronic_codebook_.28ECB.29

[78] Fix | Delete

*/

[79] Fix | Delete

define('CRYPT_RC2_MODE_ECB', CRYPT_MODE_ECB);

[80] Fix | Delete

/**

[81] Fix | Delete

* Encrypt / decrypt using the Code Book Chaining mode.

[82] Fix | Delete

*

[83] Fix | Delete

* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher-block_chaining_.28CBC.29

[84] Fix | Delete

*/

[85] Fix | Delete

define('CRYPT_RC2_MODE_CBC', CRYPT_MODE_CBC);

[86] Fix | Delete

/**

[87] Fix | Delete

* Encrypt / decrypt using the Cipher Feedback mode.

[88] Fix | Delete

*

[89] Fix | Delete

* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher_feedback_.28CFB.29

[90] Fix | Delete

*/

[91] Fix | Delete

define('CRYPT_RC2_MODE_CFB', CRYPT_MODE_CFB);

[92] Fix | Delete

/**

[93] Fix | Delete

* Encrypt / decrypt using the Cipher Feedback mode.

[94] Fix | Delete

*

[95] Fix | Delete

* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Output_feedback_.28OFB.29

[96] Fix | Delete

*/

[97] Fix | Delete

define('CRYPT_RC2_MODE_OFB', CRYPT_MODE_OFB);

[98] Fix | Delete

/**#@-*/

[99] Fix | Delete

[100] Fix | Delete

/**#@+

[101] Fix | Delete

* @access private

[102] Fix | Delete

* @see Crypt_RC2::Crypt_RC2()

[103] Fix | Delete

*/

[104] Fix | Delete

/**

[105] Fix | Delete

* Toggles the internal implementation

[106] Fix | Delete

*/

[107] Fix | Delete

define('CRYPT_RC2_MODE_INTERNAL', CRYPT_MODE_INTERNAL);

[108] Fix | Delete

/**

[109] Fix | Delete

* Toggles the mcrypt implementation

[110] Fix | Delete

*/

[111] Fix | Delete

define('CRYPT_RC2_MODE_MCRYPT', CRYPT_MODE_MCRYPT);

[112] Fix | Delete

/**#@-*/

[113] Fix | Delete

[114] Fix | Delete

/**

[115] Fix | Delete

* Pure-PHP implementation of RC2.

[116] Fix | Delete

*

[117] Fix | Delete

* @package Crypt_RC2

[118] Fix | Delete

* @access public

[119] Fix | Delete

*/

[120] Fix | Delete

class Crypt_RC2 extends Crypt_Base

[121] Fix | Delete

{

[122] Fix | Delete

/**

[123] Fix | Delete

* Block Length of the cipher

[124] Fix | Delete

*

[125] Fix | Delete

* @see Crypt_Base::block_size

[126] Fix | Delete

* @var Integer

[127] Fix | Delete

* @access private

[128] Fix | Delete

*/

[129] Fix | Delete

public $block_size = 8;

[130] Fix | Delete

[131] Fix | Delete

/**

[132] Fix | Delete

* The Key

[133] Fix | Delete

*

[134] Fix | Delete

* @see Crypt_Base::key

[135] Fix | Delete

* @see setKey()

[136] Fix | Delete

* @var String

[137] Fix | Delete

* @access private

[138] Fix | Delete

*/

[139] Fix | Delete

public $key = "\0";

[140] Fix | Delete

[141] Fix | Delete

/**

[142] Fix | Delete

* The default password key_size used by setPassword()

[143] Fix | Delete

*

[144] Fix | Delete

* @see Crypt_Base::password_key_size

[145] Fix | Delete

* @see Crypt_Base::setPassword()

[146] Fix | Delete

* @var Integer

[147] Fix | Delete

* @access private

[148] Fix | Delete

*/

[149] Fix | Delete

public $password_key_size = 16; // = 128 bits

[150] Fix | Delete

[151] Fix | Delete

/**

[152] Fix | Delete

* The namespace used by the cipher for its constants.

[153] Fix | Delete

*

[154] Fix | Delete

* @see Crypt_Base::const_namespace

[155] Fix | Delete

* @var String

[156] Fix | Delete

* @access private

[157] Fix | Delete

*/

[158] Fix | Delete

public $const_namespace = 'RC2';

[159] Fix | Delete

[160] Fix | Delete

/**

[161] Fix | Delete

* The mcrypt specific name of the cipher

[162] Fix | Delete

*

[163] Fix | Delete

* @see Crypt_Base::cipher_name_mcrypt

[164] Fix | Delete

* @var String

[165] Fix | Delete

* @access private

[166] Fix | Delete

*/

[167] Fix | Delete

public $cipher_name_mcrypt = 'rc2';

[168] Fix | Delete

[169] Fix | Delete

/**

[170] Fix | Delete

* Optimizing value while CFB-encrypting

[171] Fix | Delete

*

[172] Fix | Delete

* @see Crypt_Base::cfb_init_len

[173] Fix | Delete

* @var Integer

[174] Fix | Delete

* @access private

[175] Fix | Delete

*/

[176] Fix | Delete

public $cfb_init_len = 500;

[177] Fix | Delete

[178] Fix | Delete

/**

[179] Fix | Delete

* The key length in bits.

[180] Fix | Delete

*

[181] Fix | Delete

* @see Crypt_RC2::setKeyLength()

[182] Fix | Delete

* @see Crypt_RC2::setKey()

[183] Fix | Delete

* @var Integer

[184] Fix | Delete

* @access private

[185] Fix | Delete

* @internal Should be in range [1..1024].

[186] Fix | Delete

* @internal Changing this value after setting the key has no effect.

[187] Fix | Delete

*/

[188] Fix | Delete

public $default_key_length = 1024;

[189] Fix | Delete

[190] Fix | Delete

/**

[191] Fix | Delete

* The Key Schedule

[192] Fix | Delete

*

[193] Fix | Delete

* @see Crypt_RC2::_setupKey()

[194] Fix | Delete

* @var Array

[195] Fix | Delete

* @access private

[196] Fix | Delete

*/

[197] Fix | Delete

public $keys;

[198] Fix | Delete

[199] Fix | Delete

/**

[200] Fix | Delete

* Key expansion randomization table.

[201] Fix | Delete

* Twice the same 256-value sequence to save a modulus in key expansion.

[202] Fix | Delete

*

[203] Fix | Delete

* @see Crypt_RC2::setKey()

[204] Fix | Delete

* @var Array

[205] Fix | Delete

* @access private

[206] Fix | Delete

*/

[207] Fix | Delete

var $pitable = array(

[208] Fix | Delete

0xD9, 0x78, 0xF9, 0xC4, 0x19, 0xDD, 0xB5, 0xED,

[209] Fix | Delete

0x28, 0xE9, 0xFD, 0x79, 0x4A, 0xA0, 0xD8, 0x9D,

[210] Fix | Delete

0xC6, 0x7E, 0x37, 0x83, 0x2B, 0x76, 0x53, 0x8E,

[211] Fix | Delete

0x62, 0x4C, 0x64, 0x88, 0x44, 0x8B, 0xFB, 0xA2,

[212] Fix | Delete

0x17, 0x9A, 0x59, 0xF5, 0x87, 0xB3, 0x4F, 0x13,

[213] Fix | Delete

0x61, 0x45, 0x6D, 0x8D, 0x09, 0x81, 0x7D, 0x32,

[214] Fix | Delete

0xBD, 0x8F, 0x40, 0xEB, 0x86, 0xB7, 0x7B, 0x0B,

[215] Fix | Delete

0xF0, 0x95, 0x21, 0x22, 0x5C, 0x6B, 0x4E, 0x82,

[216] Fix | Delete

0x54, 0xD6, 0x65, 0x93, 0xCE, 0x60, 0xB2, 0x1C,

[217] Fix | Delete

0x73, 0x56, 0xC0, 0x14, 0xA7, 0x8C, 0xF1, 0xDC,

[218] Fix | Delete

0x12, 0x75, 0xCA, 0x1F, 0x3B, 0xBE, 0xE4, 0xD1,

[219] Fix | Delete

0x42, 0x3D, 0xD4, 0x30, 0xA3, 0x3C, 0xB6, 0x26,

[220] Fix | Delete

0x6F, 0xBF, 0x0E, 0xDA, 0x46, 0x69, 0x07, 0x57,

[221] Fix | Delete

0x27, 0xF2, 0x1D, 0x9B, 0xBC, 0x94, 0x43, 0x03,

[222] Fix | Delete

0xF8, 0x11, 0xC7, 0xF6, 0x90, 0xEF, 0x3E, 0xE7,

[223] Fix | Delete

0x06, 0xC3, 0xD5, 0x2F, 0xC8, 0x66, 0x1E, 0xD7,

[224] Fix | Delete

0x08, 0xE8, 0xEA, 0xDE, 0x80, 0x52, 0xEE, 0xF7,

[225] Fix | Delete

0x84, 0xAA, 0x72, 0xAC, 0x35, 0x4D, 0x6A, 0x2A,

[226] Fix | Delete

0x96, 0x1A, 0xD2, 0x71, 0x5A, 0x15, 0x49, 0x74,

[227] Fix | Delete

0x4B, 0x9F, 0xD0, 0x5E, 0x04, 0x18, 0xA4, 0xEC,

[228] Fix | Delete

0xC2, 0xE0, 0x41, 0x6E, 0x0F, 0x51, 0xCB, 0xCC,

[229] Fix | Delete

0x24, 0x91, 0xAF, 0x50, 0xA1, 0xF4, 0x70, 0x39,

[230] Fix | Delete

0x99, 0x7C, 0x3A, 0x85, 0x23, 0xB8, 0xB4, 0x7A,

[231] Fix | Delete

0xFC, 0x02, 0x36, 0x5B, 0x25, 0x55, 0x97, 0x31,

[232] Fix | Delete

0x2D, 0x5D, 0xFA, 0x98, 0xE3, 0x8A, 0x92, 0xAE,

[233] Fix | Delete

0x05, 0xDF, 0x29, 0x10, 0x67, 0x6C, 0xBA, 0xC9,

[234] Fix | Delete

0xD3, 0x00, 0xE6, 0xCF, 0xE1, 0x9E, 0xA8, 0x2C,

[235] Fix | Delete

0x63, 0x16, 0x01, 0x3F, 0x58, 0xE2, 0x89, 0xA9,

[236] Fix | Delete

0x0D, 0x38, 0x34, 0x1B, 0xAB, 0x33, 0xFF, 0xB0,

[237] Fix | Delete

0xBB, 0x48, 0x0C, 0x5F, 0xB9, 0xB1, 0xCD, 0x2E,

[238] Fix | Delete

0xC5, 0xF3, 0xDB, 0x47, 0xE5, 0xA5, 0x9C, 0x77,

[239] Fix | Delete

0x0A, 0xA6, 0x20, 0x68, 0xFE, 0x7F, 0xC1, 0xAD,

[240] Fix | Delete

0xD9, 0x78, 0xF9, 0xC4, 0x19, 0xDD, 0xB5, 0xED,

[241] Fix | Delete

0x28, 0xE9, 0xFD, 0x79, 0x4A, 0xA0, 0xD8, 0x9D,

[242] Fix | Delete

0xC6, 0x7E, 0x37, 0x83, 0x2B, 0x76, 0x53, 0x8E,

[243] Fix | Delete

0x62, 0x4C, 0x64, 0x88, 0x44, 0x8B, 0xFB, 0xA2,

[244] Fix | Delete

0x17, 0x9A, 0x59, 0xF5, 0x87, 0xB3, 0x4F, 0x13,

[245] Fix | Delete

0x61, 0x45, 0x6D, 0x8D, 0x09, 0x81, 0x7D, 0x32,

[246] Fix | Delete

0xBD, 0x8F, 0x40, 0xEB, 0x86, 0xB7, 0x7B, 0x0B,

[247] Fix | Delete

0xF0, 0x95, 0x21, 0x22, 0x5C, 0x6B, 0x4E, 0x82,

[248] Fix | Delete

0x54, 0xD6, 0x65, 0x93, 0xCE, 0x60, 0xB2, 0x1C,

[249] Fix | Delete

0x73, 0x56, 0xC0, 0x14, 0xA7, 0x8C, 0xF1, 0xDC,

[250] Fix | Delete

0x12, 0x75, 0xCA, 0x1F, 0x3B, 0xBE, 0xE4, 0xD1,

[251] Fix | Delete

0x42, 0x3D, 0xD4, 0x30, 0xA3, 0x3C, 0xB6, 0x26,

[252] Fix | Delete

0x6F, 0xBF, 0x0E, 0xDA, 0x46, 0x69, 0x07, 0x57,

[253] Fix | Delete

0x27, 0xF2, 0x1D, 0x9B, 0xBC, 0x94, 0x43, 0x03,

[254] Fix | Delete

0xF8, 0x11, 0xC7, 0xF6, 0x90, 0xEF, 0x3E, 0xE7,

[255] Fix | Delete

0x06, 0xC3, 0xD5, 0x2F, 0xC8, 0x66, 0x1E, 0xD7,

[256] Fix | Delete

0x08, 0xE8, 0xEA, 0xDE, 0x80, 0x52, 0xEE, 0xF7,

[257] Fix | Delete

0x84, 0xAA, 0x72, 0xAC, 0x35, 0x4D, 0x6A, 0x2A,

[258] Fix | Delete

0x96, 0x1A, 0xD2, 0x71, 0x5A, 0x15, 0x49, 0x74,

[259] Fix | Delete

0x4B, 0x9F, 0xD0, 0x5E, 0x04, 0x18, 0xA4, 0xEC,

[260] Fix | Delete

0xC2, 0xE0, 0x41, 0x6E, 0x0F, 0x51, 0xCB, 0xCC,

[261] Fix | Delete

0x24, 0x91, 0xAF, 0x50, 0xA1, 0xF4, 0x70, 0x39,

[262] Fix | Delete

0x99, 0x7C, 0x3A, 0x85, 0x23, 0xB8, 0xB4, 0x7A,

[263] Fix | Delete

0xFC, 0x02, 0x36, 0x5B, 0x25, 0x55, 0x97, 0x31,

[264] Fix | Delete

0x2D, 0x5D, 0xFA, 0x98, 0xE3, 0x8A, 0x92, 0xAE,

[265] Fix | Delete

0x05, 0xDF, 0x29, 0x10, 0x67, 0x6C, 0xBA, 0xC9,

[266] Fix | Delete

0xD3, 0x00, 0xE6, 0xCF, 0xE1, 0x9E, 0xA8, 0x2C,

[267] Fix | Delete

0x63, 0x16, 0x01, 0x3F, 0x58, 0xE2, 0x89, 0xA9,

[268] Fix | Delete

0x0D, 0x38, 0x34, 0x1B, 0xAB, 0x33, 0xFF, 0xB0,

[269] Fix | Delete

0xBB, 0x48, 0x0C, 0x5F, 0xB9, 0xB1, 0xCD, 0x2E,

[270] Fix | Delete

0xC5, 0xF3, 0xDB, 0x47, 0xE5, 0xA5, 0x9C, 0x77,

[271] Fix | Delete

0x0A, 0xA6, 0x20, 0x68, 0xFE, 0x7F, 0xC1, 0xAD,

[272] Fix | Delete

);

[273] Fix | Delete

[274] Fix | Delete

/**

[275] Fix | Delete

* Inverse key expansion randomization table.

[276] Fix | Delete

*

[277] Fix | Delete

* @see Crypt_RC2::setKey()

[278] Fix | Delete

* @var Array

[279] Fix | Delete

* @access private

[280] Fix | Delete

*/

[281] Fix | Delete

var $invpitable = array(

[282] Fix | Delete

0xD1, 0xDA, 0xB9, 0x6F, 0x9C, 0xC8, 0x78, 0x66,

[283] Fix | Delete

0x80, 0x2C, 0xF8, 0x37, 0xEA, 0xE0, 0x62, 0xA4,

[284] Fix | Delete

0xCB, 0x71, 0x50, 0x27, 0x4B, 0x95, 0xD9, 0x20,

[285] Fix | Delete

0x9D, 0x04, 0x91, 0xE3, 0x47, 0x6A, 0x7E, 0x53,

[286] Fix | Delete

0xFA, 0x3A, 0x3B, 0xB4, 0xA8, 0xBC, 0x5F, 0x68,

[287] Fix | Delete

0x08, 0xCA, 0x8F, 0x14, 0xD7, 0xC0, 0xEF, 0x7B,

[288] Fix | Delete

0x5B, 0xBF, 0x2F, 0xE5, 0xE2, 0x8C, 0xBA, 0x12,

[289] Fix | Delete

0xE1, 0xAF, 0xB2, 0x54, 0x5D, 0x59, 0x76, 0xDB,

[290] Fix | Delete

0x32, 0xA2, 0x58, 0x6E, 0x1C, 0x29, 0x64, 0xF3,

[291] Fix | Delete

0xE9, 0x96, 0x0C, 0x98, 0x19, 0x8D, 0x3E, 0x26,

[292] Fix | Delete

0xAB, 0xA5, 0x85, 0x16, 0x40, 0xBD, 0x49, 0x67,

[293] Fix | Delete

0xDC, 0x22, 0x94, 0xBB, 0x3C, 0xC1, 0x9B, 0xEB,

[294] Fix | Delete

0x45, 0x28, 0x18, 0xD8, 0x1A, 0x42, 0x7D, 0xCC,

[295] Fix | Delete

0xFB, 0x65, 0x8E, 0x3D, 0xCD, 0x2A, 0xA3, 0x60,

[296] Fix | Delete

0xAE, 0x93, 0x8A, 0x48, 0x97, 0x51, 0x15, 0xF7,

[297] Fix | Delete

0x01, 0x0B, 0xB7, 0x36, 0xB1, 0x2E, 0x11, 0xFD,

[298] Fix | Delete

0x84, 0x2D, 0x3F, 0x13, 0x88, 0xB3, 0x34, 0x24,

[299] Fix | Delete

0x1B, 0xDE, 0xC5, 0x1D, 0x4D, 0x2B, 0x17, 0x31,

[300] Fix | Delete

0x74, 0xA9, 0xC6, 0x43, 0x6D, 0x39, 0x90, 0xBE,

[301] Fix | Delete

0xC3, 0xB0, 0x21, 0x6B, 0xF6, 0x0F, 0xD5, 0x99,

[302] Fix | Delete

0x0D, 0xAC, 0x1F, 0x5C, 0x9E, 0xF5, 0xF9, 0x4C,

[303] Fix | Delete

0xD6, 0xDF, 0x89, 0xE4, 0x8B, 0xFF, 0xC7, 0xAA,

[304] Fix | Delete

0xE7, 0xED, 0x46, 0x25, 0xB6, 0x06, 0x5E, 0x35,

[305] Fix | Delete

0xB5, 0xEC, 0xCE, 0xE8, 0x6C, 0x30, 0x55, 0x61,

[306] Fix | Delete

0x4A, 0xFE, 0xA0, 0x79, 0x03, 0xF0, 0x10, 0x72,

[307] Fix | Delete

0x7C, 0xCF, 0x52, 0xA6, 0xA7, 0xEE, 0x44, 0xD3,

[308] Fix | Delete

0x9A, 0x57, 0x92, 0xD0, 0x5A, 0x7A, 0x41, 0x7F,

[309] Fix | Delete

0x0E, 0x00, 0x63, 0xF2, 0x4F, 0x05, 0x83, 0xC9,

[310] Fix | Delete

0xA1, 0xD4, 0xDD, 0xC4, 0x56, 0xF4, 0xD2, 0x77,

[311] Fix | Delete

0x81, 0x09, 0x82, 0x33, 0x9F, 0x07, 0x86, 0x75,

[312] Fix | Delete

0x38, 0x4E, 0x69, 0xF1, 0xAD, 0x23, 0x73, 0x87,

[313] Fix | Delete

0x70, 0x02, 0xC2, 0x1E, 0xB8, 0x0A, 0xFC, 0xE6,

[314] Fix | Delete

);

[315] Fix | Delete

[316] Fix | Delete

/**

[317] Fix | Delete

* Default Constructor.

[318] Fix | Delete

*

[319] Fix | Delete

* Determines whether or not the mcrypt extension should be used.

[320] Fix | Delete

*

[321] Fix | Delete

* $mode could be:

[322] Fix | Delete

*

[323] Fix | Delete

* - CRYPT_RC2_MODE_ECB

[324] Fix | Delete

*

[325] Fix | Delete

* - CRYPT_RC2_MODE_CBC

[326] Fix | Delete

*

[327] Fix | Delete

* - CRYPT_RC2_MODE_CTR

[328] Fix | Delete

*

[329] Fix | Delete

* - CRYPT_RC2_MODE_CFB

[330] Fix | Delete

*

[331] Fix | Delete

* - CRYPT_RC2_MODE_OFB

[332] Fix | Delete

*

[333] Fix | Delete

* If not explicitly set, CRYPT_RC2_MODE_CBC will be used.

[334] Fix | Delete

*

[335] Fix | Delete

* @see Crypt_Base::Crypt_Base()

[336] Fix | Delete

*

[337] Fix | Delete

* @param optional Integer $mode

[338] Fix | Delete

*

[339] Fix | Delete

* @access public

[340] Fix | Delete

*/

[341] Fix | Delete

public function __construct($mode = CRYPT_RC2_MODE_CBC)

[342] Fix | Delete

{

[343] Fix | Delete

parent::__construct($mode);

[344] Fix | Delete

$this->setKey('');

[345] Fix | Delete

}

[346] Fix | Delete

[347] Fix | Delete

/**

[348] Fix | Delete

* Sets the key length

[349] Fix | Delete

*

[350] Fix | Delete

* Valid key lengths are 1 to 1024.

[351] Fix | Delete

* Calling this function after setting the key has no effect until the next

[352] Fix | Delete

* Crypt_RC2::setKey() call.

[353] Fix | Delete

*

[354] Fix | Delete

* @access public

[355] Fix | Delete

*

[356] Fix | Delete

* @param Integer $length in bits

[357] Fix | Delete

*/

[358] Fix | Delete

public function setKeyLength($length)

[359] Fix | Delete

{

[360] Fix | Delete

if ($length >= 1 && $length <= 1024) {

[361] Fix | Delete

$this->default_key_length = $length;

[362] Fix | Delete

}

[363] Fix | Delete

}

[364] Fix | Delete

[365] Fix | Delete

/**

[366] Fix | Delete

* Sets the key.

[367] Fix | Delete

*

[368] Fix | Delete

* Keys can be of any length. RC2, itself, uses 1 to 1024 bit keys (eg.

[369] Fix | Delete

* strlen($key) <= 128), however, we only use the first 128 bytes if $key

[370] Fix | Delete

* has more then 128 bytes in it, and set $key to a single null byte if

[371] Fix | Delete

* it is empty.

[372] Fix | Delete

*

[373] Fix | Delete

* If the key is not explicitly set, it'll be assumed to be a single

[374] Fix | Delete

* null byte.

[375] Fix | Delete

*

[376] Fix | Delete

* @see Crypt_Base::setKey()

[377] Fix | Delete

* @access public

[378] Fix | Delete

*

[379] Fix | Delete

* @param String $key

[380] Fix | Delete

* @param Integer $t1 optional Effective key length in bits.

[381] Fix | Delete

*/

[382] Fix | Delete

public function setKey($key, $t1 = 0)

[383] Fix | Delete

{

[384] Fix | Delete

if ($t1 <= 0) {

[385] Fix | Delete

$t1 = $this->default_key_length;

[386] Fix | Delete

} elseif ($t1 > 1024) {

[387] Fix | Delete

$t1 = 1024;

[388] Fix | Delete

}

[389] Fix | Delete

// Key byte count should be 1..128.

[390] Fix | Delete

$key = strlen($key) ? substr($key, 0, 128) : "\x00";

[391] Fix | Delete

$t = strlen($key);

[392] Fix | Delete

[393] Fix | Delete

// The mcrypt RC2 implementation only supports effective key length

[394] Fix | Delete

// of 1024 bits. It is however possible to handle effective key

[395] Fix | Delete

// lengths in range 1..1024 by expanding the key and applying

[396] Fix | Delete

// inverse pitable mapping to the first byte before submitting it

[397] Fix | Delete

// to mcrypt.

[398] Fix | Delete

[399] Fix | Delete

// Key expansion.

[400] Fix | Delete

$l = array_values(unpack('C*', $key));

[401] Fix | Delete

$t8 = ($t1 + 7) >> 3;

[402] Fix | Delete

$tm = 0xFF >> (8 * $t8 - $t1);

[403] Fix | Delete

[404] Fix | Delete

// Expand key.

[405] Fix | Delete

$pitable = $this->pitable;

[406] Fix | Delete

for ($i = $t; $i < 128; $i++) {

[407] Fix | Delete

$l[$i] = $pitable[$l[$i - 1] + $l[$i - $t]];

[408] Fix | Delete

}

[409] Fix | Delete

$i = 128 - $t8;

[410] Fix | Delete

$l[$i] = $pitable[$l[$i] & $tm];

[411] Fix | Delete

while ($i--) {

[412] Fix | Delete

$l[$i] = $pitable[$l[$i + 1] ^ $l[$i + $t8]];

[413] Fix | Delete

}

[414] Fix | Delete

[415] Fix | Delete

// Prepare the key for mcrypt.

[416] Fix | Delete

$l[0] = $this->invpitable[$l[0]];

[417] Fix | Delete

array_unshift($l, 'C*');

[418] Fix | Delete

parent::setKey(call_user_func_array('pack', $l));

[419] Fix | Delete

}

[420] Fix | Delete

[421] Fix | Delete

/**

[422] Fix | Delete

* Encrypts a block

[423] Fix | Delete

*

[424] Fix | Delete

* @see Crypt_Base::_encryptBlock()

[425] Fix | Delete

* @see Crypt_Base::encrypt()

[426] Fix | Delete

* @access private

[427] Fix | Delete

*

[428] Fix | Delete

* @param String $in

[429] Fix | Delete

*

[430] Fix | Delete

* @return String

[431] Fix | Delete

*/

[432] Fix | Delete

public function _encryptBlock($in)

[433] Fix | Delete

{

[434] Fix | Delete

list($r0, $r1, $r2, $r3) = array_values(unpack('v*', $in));

[435] Fix | Delete

$keys = $this->keys;

[436] Fix | Delete

$limit = 20;

[437] Fix | Delete

$actions = array($limit => 44, 44 => 64);

[438] Fix | Delete

$j = 0;

[439] Fix | Delete

[440] Fix | Delete

for (;;) {

[441] Fix | Delete

// Mixing round.

[442] Fix | Delete

$r0 = (($r0 + $keys[$j++] + ((($r1 ^ $r2) & $r3) ^ $r1)) & 0xFFFF) << 1;

[443] Fix | Delete

$r0 |= $r0 >> 16;

[444] Fix | Delete

$r1 = (($r1 + $keys[$j++] + ((($r2 ^ $r3) & $r0) ^ $r2)) & 0xFFFF) << 2;

[445] Fix | Delete

$r1 |= $r1 >> 16;

[446] Fix | Delete

$r2 = (($r2 + $keys[$j++] + ((($r3 ^ $r0) & $r1) ^ $r3)) & 0xFFFF) << 3;

[447] Fix | Delete

$r2 |= $r2 >> 16;

[448] Fix | Delete

$r3 = (($r3 + $keys[$j++] + ((($r0 ^ $r1) & $r2) ^ $r0)) & 0xFFFF) << 5;

[449] Fix | Delete

$r3 |= $r3 >> 16;

[450] Fix | Delete

[451] Fix | Delete

if ($j === $limit) {

[452] Fix | Delete

if ($limit === 64) {

[453] Fix | Delete

break;

[454] Fix | Delete

}

[455] Fix | Delete

[456] Fix | Delete

// Mashing round.

[457] Fix | Delete

$r0 += $keys[$r3 & 0x3F];

[458] Fix | Delete

$r1 += $keys[$r0 & 0x3F];

[459] Fix | Delete

$r2 += $keys[$r1 & 0x3F];

[460] Fix | Delete

$r3 += $keys[$r2 & 0x3F];

[461] Fix | Delete

$limit = $actions[$limit];

[462] Fix | Delete

}

[463] Fix | Delete

}

[464] Fix | Delete

[465] Fix | Delete

return pack('vvvv', $r0, $r1, $r2, $r3);

[466] Fix | Delete

}

[467] Fix | Delete

[468] Fix | Delete

/**

[469] Fix | Delete

* Decrypts a block

[470] Fix | Delete

*

[471] Fix | Delete

* @see Crypt_Base::_decryptBlock()

[472] Fix | Delete

* @see Crypt_Base::decrypt()

[473] Fix | Delete

* @access private

[474] Fix | Delete

*

[475] Fix | Delete

* @param String $in

[476] Fix | Delete

*

[477] Fix | Delete

* @return String

[478] Fix | Delete

*/

[479] Fix | Delete

public function _decryptBlock($in)

[480] Fix | Delete

{

[481] Fix | Delete

list($r0, $r1, $r2, $r3) = array_values(unpack('v*', $in));

[482] Fix | Delete

$keys = $this->keys;

[483] Fix | Delete

$limit = 44;

[484] Fix | Delete

$actions = array($limit => 20, 20 => 0);

[485] Fix | Delete

$j = 64;

[486] Fix | Delete

[487] Fix | Delete

for (;;) {

[488] Fix | Delete

// R-mixing round.

[489] Fix | Delete

$r3 = ($r3 | ($r3 << 16)) >> 5;

[490] Fix | Delete

$r3 = ($r3 - $keys[--$j] - ((($r0 ^ $r1) & $r2) ^ $r0)) & 0xFFFF;

[491] Fix | Delete

$r2 = ($r2 | ($r2 << 16)) >> 3;

[492] Fix | Delete

$r2 = ($r2 - $keys[--$j] - ((($r3 ^ $r0) & $r1) ^ $r3)) & 0xFFFF;

[493] Fix | Delete

$r1 = ($r1 | ($r1 << 16)) >> 2;

[494] Fix | Delete

$r1 = ($r1 - $keys[--$j] - ((($r2 ^ $r3) & $r0) ^ $r2)) & 0xFFFF;

[495] Fix | Delete

$r0 = ($r0 | ($r0 << 16)) >> 1;

[496] Fix | Delete

$r0 = ($r0 - $keys[--$j] - ((($r1 ^ $r2) & $r3) ^ $r1)) & 0xFFFF;

[497] Fix | Delete

[498] Fix | Delete

if ($j === $limit) {

[499] Fix | Delete