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1 <?php 2 3 /** 4 * Pure-PHP implementation of Blowfish. 5 * 6 * Uses mcrypt, if available, and an internal implementation, otherwise. 7 * 8 * PHP version 5 9 * 10 * Useful resources are as follows: 11 * 12 * - {@link http://en.wikipedia.org/wiki/Blowfish_(cipher) Wikipedia description of Blowfish} 13 * 14 * Here's a short example of how to use this library: 15 * <code> 16 * <?php 17 * include 'vendor/autoload.php'; 18 * 19 * $blowfish = new \phpseclib3\Crypt\Blowfish('ctr'); 20 * 21 * $blowfish->setKey('12345678901234567890123456789012'); 22 * 23 * $plaintext = str_repeat('a', 1024); 24 * 25 * echo $blowfish->decrypt($blowfish->encrypt($plaintext)); 26 * ?> 27 * </code> 28 * 29 * @category Crypt 30 * @package Blowfish 31 * @author Jim Wigginton <[email protected]> 32 * @author Hans-Juergen Petrich <[email protected]> 33 * @copyright 2007 Jim Wigginton 34 * @license http://www.opensource.org/licenses/mit-license.html MIT License 35 * @link http://phpseclib.sourceforge.net 36 */ 37 38 namespace phpseclib3\Crypt; 39 40 use phpseclib3\Crypt\Common\BlockCipher; 41 42 /** 43 * Pure-PHP implementation of Blowfish. 44 * 45 * @package Blowfish 46 * @author Jim Wigginton <[email protected]> 47 * @author Hans-Juergen Petrich <[email protected]> 48 * @access public 49 */ 50 class Blowfish extends BlockCipher 51 { 52 /** 53 * Block Length of the cipher 54 * 55 * @see \phpseclib3\Crypt\Common\SymmetricKey::block_size 56 * @var int 57 * @access private 58 */ 59 protected $block_size = 8; 60 61 /** 62 * The mcrypt specific name of the cipher 63 * 64 * @see \phpseclib3\Crypt\Common\SymmetricKey::cipher_name_mcrypt 65 * @var string 66 * @access private 67 */ 68 protected $cipher_name_mcrypt = 'blowfish'; 69 70 /** 71 * Optimizing value while CFB-encrypting 72 * 73 * @see \phpseclib3\Crypt\Common\SymmetricKey::cfb_init_len 74 * @var int 75 * @access private 76 */ 77 protected $cfb_init_len = 500; 78 79 /** 80 * The fixed subkeys boxes ($sbox0 - $sbox3) with 256 entries each 81 * 82 * S-Box 0 83 * 84 * @access private 85 * @var array 86 */ 87 private static $sbox0 = [ 88 0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7, 0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99, 89 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16, 0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e, 90 0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee, 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013, 91 0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef, 0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e, 92 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60, 0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440, 93 0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce, 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a, 94 0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e, 0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677, 95 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193, 0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032, 96 0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88, 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239, 97 0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e, 0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0, 98 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3, 0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98, 99 0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88, 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe, 100 0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6, 0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d, 101 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b, 0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7, 102 0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba, 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463, 103 0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f, 0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09, 104 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3, 0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb, 105 0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279, 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8, 106 0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab, 0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82, 107 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db, 0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573, 108 0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0, 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b, 109 0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790, 0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8, 110 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4, 0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0, 111 0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7, 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c, 112 0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad, 0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1, 113 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299, 0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9, 114 0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477, 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf, 115 0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49, 0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af, 116 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa, 0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5, 117 0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41, 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915, 118 0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400, 0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915, 119 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664, 0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a 120 ]; 121 122 /** 123 * S-Box 1 124 * 125 * @access private 126 * @var array 127 */ 128 private static $sbox1 = [ 129 0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623, 0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266, 130 0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1, 0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e, 131 0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6, 0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1, 132 0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e, 0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1, 133 0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737, 0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8, 134 0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff, 0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd, 135 0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701, 0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7, 136 0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41, 0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331, 137 0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf, 0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af, 138 0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e, 0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87, 139 0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c, 0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2, 140 0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16, 0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd, 141 0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b, 0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509, 142 0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e, 0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3, 143 0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f, 0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a, 144 0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4, 0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960, 145 0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66, 0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28, 146 0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802, 0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84, 147 0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510, 0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf, 148 0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14, 0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e, 149 0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50, 0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7, 150 0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8, 0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281, 151 0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99, 0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696, 152 0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128, 0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73, 153 0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0, 0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0, 154 0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105, 0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250, 155 0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3, 0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285, 156 0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00, 0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061, 157 0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb, 0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e, 158 0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735, 0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc, 159 0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9, 0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340, 160 0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20, 0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7 161 ]; 162 163 /** 164 * S-Box 2 165 * 166 * @access private 167 * @var array 168 */ 169 private static $sbox2 = [ 170 0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934, 0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068, 171 0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af, 0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840, 172 0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45, 0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504, 173 0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a, 0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb, 174 0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee, 0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6, 175 0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42, 0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b, 176 0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2, 0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb, 177 0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527, 0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b, 178 0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33, 0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c, 179 0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3, 0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc, 180 0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17, 0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564, 181 0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b, 0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115, 182 0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922, 0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728, 183 0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0, 0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e, 184 0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37, 0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d, 185 0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804, 0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b, 186 0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3, 0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb, 187 0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d, 0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c, 188 0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350, 0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9, 189 0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a, 0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe, 190 0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d, 0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc, 191 0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f, 0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61, 192 0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2, 0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9, 193 0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2, 0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c, 194 0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e, 0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633, 195 0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10, 0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169, 196 0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52, 0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027, 197 0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5, 0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62, 198 0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634, 0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76, 199 0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24, 0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc, 200 0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4, 0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c, 201 0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837, 0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0 202 ]; 203 204 /** 205 * S-Box 3 206 * 207 * @access private 208 * @var array 209 */ 210 private static $sbox3 = [ 211 0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b, 0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe, 212 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b, 0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4, 213 0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8, 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6, 214 0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304, 0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22, 215 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4, 0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6, 216 0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9, 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59, 217 0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593, 0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51, 218 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28, 0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c, 219 0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b, 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28, 220 0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c, 0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd, 221 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a, 0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319, 222 0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb, 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f, 223 0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991, 0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32, 224 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680, 0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166, 225 0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae, 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb, 226 0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5, 0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47, 227 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370, 0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d, 228 0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84, 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048, 229 0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8, 0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd, 230 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9, 0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7, 231 0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38, 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f, 232 0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c, 0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525, 233 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1, 0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442, 234 0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964, 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e, 235 0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8, 0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d, 236 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f, 0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299, 237 0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02, 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc, 238 0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614, 0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a, 239 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6, 0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b, 240 0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0, 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060, 241 0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e, 0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9, 242 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f, 0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6 243 ]; 244 245 /** 246 * P-Array consists of 18 32-bit subkeys 247 * 248 * @var array 249 * @access private 250 */ 251 private static $parray = [ 252 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, 0xa4093822, 0x299f31d0, 253 0x082efa98, 0xec4e6c89, 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c, 254 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917, 0x9216d5d9, 0x8979fb1b 255 ]; 256 257 /** 258 * The BCTX-working Array 259 * 260 * Holds the expanded key [p] and the key-depended s-boxes [sb] 261 * 262 * @var array 263 * @access private 264 */ 265 private $bctx; 266 267 /** 268 * Holds the last used key 269 * 270 * @var array 271 * @access private 272 */ 273 private $kl; 274 275 /** 276 * The Key Length (in bytes) 277 * {@internal The max value is 256 / 8 = 32, the min value is 128 / 8 = 16. Exists in conjunction with $Nk 278 * because the encryption / decryption / key schedule creation requires this number and not $key_length. We could 279 * derive this from $key_length or vice versa, but that'd mean we'd have to do multiple shift operations, so in lieu 280 * of that, we'll just precompute it once.} 281 * 282 * @see \phpseclib3\Crypt\Common\SymmetricKey::setKeyLength() 283 * @var int 284 * @access private 285 */ 286 protected $key_length = 16; 287 288 /** 289 * Default Constructor. 290 * 291 * @param string $mode 292 * @access public 293 * @throws \InvalidArgumentException if an invalid / unsupported mode is provided 294 */ 295 public function __construct($mode) 296 { 297 parent::__construct($mode); 298 299 if ($this->mode == self::MODE_STREAM) { 300 throw new \InvalidArgumentException('Block ciphers cannot be ran in stream mode'); 301 } 302 } 303 304 /** 305 * Sets the key length. 306 * 307 * Key lengths can be between 32 and 448 bits. 308 * 309 * @access public 310 * @param int $length 311 */ 312 public function setKeyLength($length) 313 { 314 if ($length < 32 || $length > 448) { 315 throw new \LengthException('Key size of ' . $length . ' bits is not supported by this algorithm. Only keys of sizes between 32 and 448 bits are supported'); 316 } 317 318 $this->key_length = $length >> 3; 319 320 parent::setKeyLength($length); 321 } 322 323 /** 324 * Test for engine validity 325 * 326 * This is mainly just a wrapper to set things up for \phpseclib3\Crypt\Common\SymmetricKey::isValidEngine() 327 * 328 * @see \phpseclib3\Crypt\Common\SymmetricKey::isValidEngine() 329 * @param int $engine 330 * @access protected 331 * @return bool 332 */ 333 protected function isValidEngineHelper($engine) 334 { 335 if ($engine == self::ENGINE_OPENSSL) { 336 if (version_compare(PHP_VERSION, '5.3.7') < 0 && $this->key_length != 16) { 337 return false; 338 } 339 if ($this->key_length < 16) { 340 return false; 341 } 342 $this->cipher_name_openssl_ecb = 'bf-ecb'; 343 $this->cipher_name_openssl = 'bf-' . $this->openssl_translate_mode(); 344 } 345 346 return parent::isValidEngineHelper($engine); 347 } 348 349 /** 350 * Setup the key (expansion) 351 * 352 * @see \phpseclib3\Crypt\Common\SymmetricKey::_setupKey() 353 * @access private 354 */ 355 protected function setupKey() 356 { 357 if (isset($this->kl['key']) && $this->key === $this->kl['key']) { 358 // already expanded 359 return; 360 } 361 $this->kl = ['key' => $this->key]; 362 363 /* key-expanding p[] and S-Box building sb[] */ 364 $this->bctx = [ 365 'p' => [], 366 'sb' => [ 367 self::$sbox0, 368 self::$sbox1, 369 self::$sbox2, 370 self::$sbox3 371 ] 372 ]; 373 374 // unpack binary string in unsigned chars 375 $key = array_values(unpack('C*', $this->key)); 376 $keyl = count($key); 377 for ($j = 0, $i = 0; $i < 18; ++$i) { 378 // xor P1 with the first 32-bits of the key, xor P2 with the second 32-bits ... 379 for ($data = 0, $k = 0; $k < 4; ++$k) { 380 $data = ($data << 8) | $key[$j]; 381 if (++$j >= $keyl) { 382 $j = 0; 383 } 384 } 385 $this->bctx['p'][] = self::$parray[$i] ^ $data; 386 } 387 388 // encrypt the zero-string, replace P1 and P2 with the encrypted data, 389 // encrypt P3 and P4 with the new P1 and P2, do it with all P-array and subkeys 390 $data = "\0\0\0\0\0\0\0\0"; 391 for ($i = 0; $i < 18; $i += 2) { 392 list($l, $r) = array_values(unpack('N*', $data = $this->encryptBlock($data))); 393 $this->bctx['p'][$i ] = $l; 394 $this->bctx['p'][$i + 1] = $r; 395 } 396 for ($i = 0; $i < 4; ++$i) { 397 for ($j = 0; $j < 256; $j += 2) { 398 list($l, $r) = array_values(unpack('N*', $data = $this->encryptBlock($data))); 399 $this->bctx['sb'][$i][$j ] = $l; 400 $this->bctx['sb'][$i][$j + 1] = $r; 401 } 402 } 403 } 404 405 /** 406 * Encrypts a block 407 * 408 * @access private 409 * @param string $in 410 * @return string 411 */ 412 protected function encryptBlock($in) 413 { 414 $p = $this->bctx['p']; 415 // extract($this->bctx['sb'], EXTR_PREFIX_ALL, 'sb'); // slower 416 $sb_0 = $this->bctx['sb'][0]; 417 $sb_1 = $this->bctx['sb'][1]; 418 $sb_2 = $this->bctx['sb'][2]; 419 $sb_3 = $this->bctx['sb'][3]; 420 421 $in = unpack('N*', $in); 422 $l = $in[1]; 423 $r = $in[2]; 424 425 for ($i = 0; $i < 16; $i += 2) { 426 $l ^= $p[$i]; 427 $r ^= self::safe_intval((self::safe_intval($sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff]) ^ 428 $sb_2[$l >> 8 & 0xff]) + 429 $sb_3[$l & 0xff]); 430 431 $r ^= $p[$i + 1]; 432 $l ^= self::safe_intval((self::safe_intval($sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff]) ^ 433 $sb_2[$r >> 8 & 0xff]) + 434 $sb_3[$r & 0xff]); 435 } 436 return pack('N*', $r ^ $p[17], $l ^ $p[16]); 437 } 438 439 /** 440 * Decrypts a block 441 * 442 * @access private 443 * @param string $in 444 * @return string 445 */ 446 protected function decryptBlock($in) 447 { 448 $p = $this->bctx['p']; 449 $sb_0 = $this->bctx['sb'][0]; 450 $sb_1 = $this->bctx['sb'][1]; 451 $sb_2 = $this->bctx['sb'][2]; 452 $sb_3 = $this->bctx['sb'][3]; 453 454 $in = unpack('N*', $in); 455 $l = $in[1]; 456 $r = $in[2]; 457 458 for ($i = 17; $i > 2; $i -= 2) { 459 $l ^= $p[$i]; 460 $r ^= self::safe_intval((self::safe_intval($sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff]) ^ 461 $sb_2[$l >> 8 & 0xff]) + 462 $sb_3[$l & 0xff]); 463 464 $r ^= $p[$i - 1]; 465 $l ^= self::safe_intval((self::safe_intval($sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff]) ^ 466 $sb_2[$r >> 8 & 0xff]) + 467 $sb_3[$r & 0xff]); 468 } 469 return pack('N*', $r ^ $p[0], $l ^ $p[1]); 470 } 471 472 /** 473 * Setup the performance-optimized function for de/encrypt() 474 * 475 * @see \phpseclib3\Crypt\Common\SymmetricKey::_setupInlineCrypt() 476 * @access private 477 */ 478 protected function setupInlineCrypt() 479 { 480 $p = $this->bctx['p']; 481 $init_crypt = ' 482 static $sb_0, $sb_1, $sb_2, $sb_3; 483 if (!$sb_0) { 484 $sb_0 = $this->bctx["sb"][0]; 485 $sb_1 = $this->bctx["sb"][1]; 486 $sb_2 = $this->bctx["sb"][2]; 487 $sb_3 = $this->bctx["sb"][3]; 488 } 489 '; 490 491 $safeint = self::safe_intval_inline(); 492 493 // Generating encrypt code: 494 $encrypt_block = ' 495 $in = unpack("N*", $in); 496 $l = $in[1]; 497 $r = $in[2]; 498 '; 499 for ($i = 0; $i < 16; $i += 2) { 500 $encrypt_block .= ' 501 $l^= ' . $p[$i] . '; 502 $r^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff]') . ' ^ 503 $sb_2[$l >> 8 & 0xff]) + 504 $sb_3[$l & 0xff]') . '; 505 506 $r^= ' . $p[$i + 1] . '; 507 $l^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff]') . ' ^ 508 $sb_2[$r >> 8 & 0xff]) + 509 $sb_3[$r & 0xff]') . '; 510 '; 511 } 512 $encrypt_block .= ' 513 $in = pack("N*", 514 $r ^ ' . $p[17] . ', 515 $l ^ ' . $p[16] . ' 516 ); 517 '; 518 // Generating decrypt code: 519 $decrypt_block = ' 520 $in = unpack("N*", $in); 521 $l = $in[1]; 522 $r = $in[2]; 523 '; 524 525 for ($i = 17; $i > 2; $i -= 2) { 526 $decrypt_block .= ' 527 $l^= ' . $p[$i] . '; 528 $r^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff]') . ' ^ 529 $sb_2[$l >> 8 & 0xff]) + 530 $sb_3[$l & 0xff]') . '; 531 532 $r^= ' . $p[$i - 1] . '; 533 $l^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff]') . ' ^ 534 $sb_2[$r >> 8 & 0xff]) + 535 $sb_3[$r & 0xff]') . '; 536 '; 537 } 538 539 $decrypt_block .= ' 540 $in = pack("N*", 541 $r ^ ' . $p[0] . ', 542 $l ^ ' . $p[1] . ' 543 ); 544 '; 545 546 $this->inline_crypt = $this->createInlineCryptFunction( 547 [ 548 'init_crypt' => $init_crypt, 549 'init_encrypt' => '', 550 'init_decrypt' => '', 551 'encrypt_block' => $encrypt_block, 552 'decrypt_block' => $decrypt_block 553 ] 554 ); 555 } 556 }
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