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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 * # An overview of bcrypt vs Blowfish 15 * 16 * OpenSSH private keys use a customized version of bcrypt. Specifically, instead of 17 * encrypting OrpheanBeholderScryDoubt 64 times OpenSSH's bcrypt variant encrypts 18 * OxychromaticBlowfishSwatDynamite 64 times. so we can't use crypt(). 19 * 20 * bcrypt is basically Blowfish but instead of performing the key expansion once it performs 21 * the expansion 129 times for each round, with the first key expansion interleaving the salt 22 * and password. This renders OpenSSL unusable and forces us to use a pure-PHP implementation 23 * of blowfish. 24 * 25 * # phpseclib's four different _encryptBlock() implementations 26 * 27 * When using Blowfish as an encryption algorithm, _encryptBlock() is called 9 + 512 + 28 * (the number of blocks in the plaintext) times. 29 * 30 * Each of the first 9 calls to _encryptBlock() modify the P-array. Each of the next 512 31 * calls modify the S-boxes. The remaining _encryptBlock() calls operate on the plaintext to 32 * produce the ciphertext. In the pure-PHP implementation of Blowfish these remaining 33 * _encryptBlock() calls are highly optimized through the use of eval(). Among other things, 34 * P-array lookups are eliminated by hard-coding the key-dependent P-array values, and thus we 35 * have explained 2 of the 4 different _encryptBlock() implementations. 36 * 37 * With bcrypt things are a bit different. _encryptBlock() is called 1,079,296 times, 38 * assuming 16 rounds (which is what OpenSSH's bcrypt defaults to). The eval()-optimized 39 * _encryptBlock() isn't as beneficial because the P-array values are not constant. Well, they 40 * are constant, but only for, at most, 777 _encryptBlock() calls, which is equivalent to ~6KB 41 * of data. The average length of back to back _encryptBlock() calls with a fixed P-array is 42 * 514.12, which is ~4KB of data. Creating an eval()-optimized _encryptBlock() has an upfront 43 * cost, which is CPU dependent and is probably not going to be worth it for just ~4KB of 44 * data. Conseqeuently, bcrypt does not benefit from the eval()-optimized _encryptBlock(). 45 * 46 * The regular _encryptBlock() does unpack() and pack() on every call, as well, and that can 47 * begin to add up after one million function calls. 48 * 49 * In theory, one might think that it might be beneficial to rewrite all block ciphers so 50 * that, instead of passing strings to _encryptBlock(), you convert the string to an array of 51 * integers and then pass successive subarrays of that array to _encryptBlock. This, however, 52 * kills PHP's memory use. Like let's say you have a 1MB long string. After doing 53 * $in = str_repeat('a', 1024 * 1024); PHP's memory utilization jumps up by ~1MB. After doing 54 * $blocks = str_split($in, 4); it jumps up by an additional ~16MB. After 55 * $blocks = array_map(fn($x) => unpack('N*', $x), $blocks); it jumps up by an additional 56 * ~90MB, yielding a 106x increase in memory usage. Consequently, it bcrypt calls a different 57 * _encryptBlock() then the regular Blowfish does. That said, the Blowfish _encryptBlock() is 58 * basically just a thin wrapper around the bcrypt _encryptBlock(), so there's that. 59 * 60 * This explains 3 of the 4 _encryptBlock() implementations. the last _encryptBlock() 61 * implementation can best be understood by doing Ctrl + F and searching for where 62 * self::$use_reg_intval is defined. 63 * 64 * # phpseclib's three different _setupKey() implementations 65 * 66 * Every bcrypt round is the equivalent of encrypting 512KB of data. Since OpenSSH uses 16 67 * rounds by default that's ~8MB of data that's essentially being encrypted whenever 68 * you use bcrypt. That's a lot of data, however, bcrypt operates within tighter constraints 69 * than regular Blowfish, so we can use that to our advantage. In particular, whereas Blowfish 70 * supports variable length keys, in bcrypt, the initial "key" is the sha512 hash of the 71 * password. sha512 hashes are 512 bits or 64 bytes long and thus the bcrypt keys are of a 72 * fixed length whereas Blowfish keys are not of a fixed length. 73 * 74 * bcrypt actually has two different key expansion steps. The first one (expandstate) is 75 * constantly XOR'ing every _encryptBlock() parameter against the salt prior _encryptBlock()'s 76 * being called. The second one (expand0state) is more similar to Blowfish's _setupKey() 77 * but it can still use the fixed length key optimization discussed above and can do away with 78 * the pack() / unpack() calls. 79 * 80 * I suppose _setupKey() could be made to be a thin wrapper around expandstate() but idk it's 81 * just a lot of work for very marginal benefits as _setupKey() is only called once for 82 * regular Blowfish vs the 128 times it's called --per round-- with bcrypt. 83 * 84 * # blowfish + bcrypt in the same class 85 * 86 * Altho there's a lot of Blowfish code that bcrypt doesn't re-use, bcrypt does re-use the 87 * initial S-boxes, the initial P-array and the int-only _encryptBlock() implementation. 88 * 89 * # Credit 90 * 91 * phpseclib's bcrypt implementation is based losely off of OpenSSH's implementation: 92 * 93 * https://github.com/openssh/openssh-portable/blob/master/openbsd-compat/bcrypt_pbkdf.c 94 * 95 * Here's a short example of how to use this library: 96 * <code> 97 * <?php 98 * include 'vendor/autoload.php'; 99 * 100 * $blowfish = new \phpseclib3\Crypt\Blowfish('ctr'); 101 * 102 * $blowfish->setKey('12345678901234567890123456789012'); 103 * 104 * $plaintext = str_repeat('a', 1024); 105 * 106 * echo $blowfish->decrypt($blowfish->encrypt($plaintext)); 107 * ?> 108 * </code> 109 * 110 * @author Jim Wigginton <terrafrost@php.net> 111 * @author Hans-Juergen Petrich <petrich@tronic-media.com> 112 * @copyright 2007 Jim Wigginton 113 * @license http://www.opensource.org/licenses/mit-license.html MIT License 114 * @link http://phpseclib.sourceforge.net 115 */ 116 117 namespace phpseclib3\Crypt; 118 119 use phpseclib3\Crypt\Common\BlockCipher; 120 121 /** 122 * Pure-PHP implementation of Blowfish. 123 * 124 * @author Jim Wigginton <terrafrost@php.net> 125 * @author Hans-Juergen Petrich <petrich@tronic-media.com> 126 */ 127 class Blowfish extends BlockCipher 128 { 129 /** 130 * Block Length of the cipher 131 * 132 * @see \phpseclib3\Crypt\Common\SymmetricKey::block_size 133 * @var int 134 */ 135 protected $block_size = 8; 136 137 /** 138 * The mcrypt specific name of the cipher 139 * 140 * @see \phpseclib3\Crypt\Common\SymmetricKey::cipher_name_mcrypt 141 * @var string 142 */ 143 protected $cipher_name_mcrypt = 'blowfish'; 144 145 /** 146 * Optimizing value while CFB-encrypting 147 * 148 * @see \phpseclib3\Crypt\Common\SymmetricKey::cfb_init_len 149 * @var int 150 */ 151 protected $cfb_init_len = 500; 152 153 /** 154 * The fixed subkeys boxes ($sbox0 - $sbox3) with 256 entries each 155 * 156 * S-Box 0 157 * 158 * @var array 159 */ 160 private static $sbox0 = [ 161 0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7, 0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99, 162 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16, 0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e, 163 0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee, 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013, 164 0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef, 0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e, 165 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60, 0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440, 166 0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce, 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a, 167 0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e, 0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677, 168 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193, 0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032, 169 0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88, 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239, 170 0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e, 0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0, 171 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3, 0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98, 172 0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88, 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe, 173 0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6, 0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d, 174 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b, 0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7, 175 0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba, 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463, 176 0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f, 0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09, 177 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3, 0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb, 178 0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279, 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8, 179 0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab, 0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82, 180 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db, 0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573, 181 0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0, 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b, 182 0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790, 0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8, 183 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4, 0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0, 184 0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7, 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c, 185 0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad, 0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1, 186 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299, 0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9, 187 0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477, 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf, 188 0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49, 0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af, 189 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa, 0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5, 190 0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41, 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915, 191 0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400, 0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915, 192 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664, 0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a 193 ]; 194 195 /** 196 * S-Box 1 197 * 198 * @var array 199 */ 200 private static $sbox1 = [ 201 0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623, 0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266, 202 0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1, 0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e, 203 0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6, 0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1, 204 0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e, 0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1, 205 0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737, 0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8, 206 0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff, 0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd, 207 0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701, 0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7, 208 0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41, 0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331, 209 0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf, 0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af, 210 0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e, 0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87, 211 0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c, 0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2, 212 0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16, 0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd, 213 0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b, 0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509, 214 0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e, 0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3, 215 0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f, 0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a, 216 0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4, 0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960, 217 0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66, 0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28, 218 0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802, 0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84, 219 0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510, 0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf, 220 0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14, 0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e, 221 0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50, 0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7, 222 0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8, 0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281, 223 0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99, 0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696, 224 0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128, 0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73, 225 0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0, 0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0, 226 0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105, 0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250, 227 0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3, 0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285, 228 0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00, 0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061, 229 0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb, 0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e, 230 0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735, 0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc, 231 0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9, 0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340, 232 0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20, 0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7 233 ]; 234 235 /** 236 * S-Box 2 237 * 238 * @var array 239 */ 240 private static $sbox2 = [ 241 0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934, 0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068, 242 0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af, 0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840, 243 0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45, 0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504, 244 0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a, 0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb, 245 0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee, 0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6, 246 0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42, 0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b, 247 0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2, 0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb, 248 0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527, 0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b, 249 0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33, 0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c, 250 0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3, 0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc, 251 0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17, 0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564, 252 0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b, 0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115, 253 0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922, 0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728, 254 0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0, 0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e, 255 0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37, 0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d, 256 0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804, 0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b, 257 0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3, 0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb, 258 0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d, 0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c, 259 0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350, 0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9, 260 0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a, 0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe, 261 0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d, 0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc, 262 0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f, 0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61, 263 0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2, 0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9, 264 0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2, 0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c, 265 0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e, 0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633, 266 0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10, 0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169, 267 0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52, 0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027, 268 0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5, 0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62, 269 0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634, 0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76, 270 0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24, 0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc, 271 0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4, 0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c, 272 0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837, 0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0 273 ]; 274 275 /** 276 * S-Box 3 277 * 278 * @var array 279 */ 280 private static $sbox3 = [ 281 0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b, 0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe, 282 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b, 0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4, 283 0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8, 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6, 284 0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304, 0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22, 285 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4, 0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6, 286 0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9, 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59, 287 0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593, 0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51, 288 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28, 0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c, 289 0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b, 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28, 290 0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c, 0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd, 291 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a, 0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319, 292 0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb, 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f, 293 0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991, 0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32, 294 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680, 0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166, 295 0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae, 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb, 296 0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5, 0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47, 297 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370, 0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d, 298 0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84, 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048, 299 0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8, 0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd, 300 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9, 0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7, 301 0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38, 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f, 302 0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c, 0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525, 303 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1, 0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442, 304 0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964, 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e, 305 0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8, 0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d, 306 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f, 0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299, 307 0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02, 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc, 308 0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614, 0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a, 309 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6, 0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b, 310 0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0, 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060, 311 0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e, 0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9, 312 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f, 0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6 313 ]; 314 315 /** 316 * P-Array consists of 18 32-bit subkeys 317 * 318 * @var array 319 */ 320 private static $parray = [ 321 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, 0xa4093822, 0x299f31d0, 322 0x082efa98, 0xec4e6c89, 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c, 323 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917, 0x9216d5d9, 0x8979fb1b 324 ]; 325 326 /** 327 * The BCTX-working Array 328 * 329 * Holds the expanded key [p] and the key-depended s-boxes [sb] 330 * 331 * @var array 332 */ 333 private $bctx; 334 335 /** 336 * Holds the last used key 337 * 338 * @var array 339 */ 340 private $kl; 341 342 /** 343 * The Key Length (in bytes) 344 * {@internal The max value is 256 / 8 = 32, the min value is 128 / 8 = 16. Exists in conjunction with $Nk 345 * because the encryption / decryption / key schedule creation requires this number and not $key_length. We could 346 * derive this from $key_length or vice versa, but that'd mean we'd have to do multiple shift operations, so in lieu 347 * of that, we'll just precompute it once.} 348 * 349 * @see \phpseclib3\Crypt\Common\SymmetricKey::setKeyLength() 350 * @var int 351 */ 352 protected $key_length = 16; 353 354 /** 355 * Default Constructor. 356 * 357 * @param string $mode 358 * @throws \InvalidArgumentException if an invalid / unsupported mode is provided 359 */ 360 public function __construct($mode) 361 { 362 parent::__construct($mode); 363 364 if ($this->mode == self::MODE_STREAM) { 365 throw new \InvalidArgumentException('Block ciphers cannot be ran in stream mode'); 366 } 367 } 368 369 /** 370 * Sets the key length. 371 * 372 * Key lengths can be between 32 and 448 bits. 373 * 374 * @param int $length 375 */ 376 public function setKeyLength($length) 377 { 378 if ($length < 32 || $length > 448) { 379 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'); 380 } 381 382 $this->key_length = $length >> 3; 383 384 parent::setKeyLength($length); 385 } 386 387 /** 388 * Test for engine validity 389 * 390 * This is mainly just a wrapper to set things up for \phpseclib3\Crypt\Common\SymmetricKey::isValidEngine() 391 * 392 * @see \phpseclib3\Crypt\Common\SymmetricKey::isValidEngine() 393 * @param int $engine 394 * @return bool 395 */ 396 protected function isValidEngineHelper($engine) 397 { 398 if ($engine == self::ENGINE_OPENSSL) { 399 if ($this->key_length < 16) { 400 return false; 401 } 402 // quoting https://www.openssl.org/news/openssl-3.0-notes.html, OpenSSL 3.0.1 403 // "Moved all variations of the EVP ciphers CAST5, BF, IDEA, SEED, RC2, RC4, RC5, and DES to the legacy provider" 404 // in theory openssl_get_cipher_methods() should catch this but, on GitHub Actions, at least, it does not 405 if (defined('OPENSSL_VERSION_TEXT') && version_compare(preg_replace('#OpenSSL (\d+\.\d+\.\d+) .*#', '$1', OPENSSL_VERSION_TEXT), '3.0.1', '>=')) { 406 return false; 407 } 408 $this->cipher_name_openssl_ecb = 'bf-ecb'; 409 $this->cipher_name_openssl = 'bf-' . $this->openssl_translate_mode(); 410 } 411 412 return parent::isValidEngineHelper($engine); 413 } 414 415 /** 416 * Setup the key (expansion) 417 * 418 * @see \phpseclib3\Crypt\Common\SymmetricKey::_setupKey() 419 */ 420 protected function setupKey() 421 { 422 if (isset($this->kl['key']) && $this->key === $this->kl['key']) { 423 // already expanded 424 return; 425 } 426 $this->kl = ['key' => $this->key]; 427 428 /* key-expanding p[] and S-Box building sb[] */ 429 $this->bctx = [ 430 'p' => [], 431 'sb' => [ 432 self::$sbox0, 433 self::$sbox1, 434 self::$sbox2, 435 self::$sbox3 436 ] 437 ]; 438 439 // unpack binary string in unsigned chars 440 $key = array_values(unpack('C*', $this->key)); 441 $keyl = count($key); 442 // with bcrypt $keyl will always be 16 (because the key is the sha512 of the key you provide) 443 for ($j = 0, $i = 0; $i < 18; ++$i) { 444 // xor P1 with the first 32-bits of the key, xor P2 with the second 32-bits ... 445 for ($data = 0, $k = 0; $k < 4; ++$k) { 446 $data = ($data << 8) | $key[$j]; 447 if (++$j >= $keyl) { 448 $j = 0; 449 } 450 } 451 $this->bctx['p'][] = self::$parray[$i] ^ intval($data); 452 } 453 454 // encrypt the zero-string, replace P1 and P2 with the encrypted data, 455 // encrypt P3 and P4 with the new P1 and P2, do it with all P-array and subkeys 456 $data = "\0\0\0\0\0\0\0\0"; 457 for ($i = 0; $i < 18; $i += 2) { 458 list($l, $r) = array_values(unpack('N*', $data = $this->encryptBlock($data))); 459 $this->bctx['p'][$i ] = $l; 460 $this->bctx['p'][$i + 1] = $r; 461 } 462 for ($i = 0; $i < 4; ++$i) { 463 for ($j = 0; $j < 256; $j += 2) { 464 list($l, $r) = array_values(unpack('N*', $data = $this->encryptBlock($data))); 465 $this->bctx['sb'][$i][$j ] = $l; 466 $this->bctx['sb'][$i][$j + 1] = $r; 467 } 468 } 469 } 470 471 /** 472 * Initialize Static Variables 473 */ 474 protected static function initialize_static_variables() 475 { 476 if (is_float(self::$sbox2[0])) { 477 self::$sbox0 = array_map('intval', self::$sbox0); 478 self::$sbox1 = array_map('intval', self::$sbox1); 479 self::$sbox2 = array_map('intval', self::$sbox2); 480 self::$sbox3 = array_map('intval', self::$sbox3); 481 self::$parray = array_map('intval', self::$parray); 482 } 483 484 parent::initialize_static_variables(); 485 } 486 487 /** 488 * bcrypt 489 * 490 * @param string $sha2pass 491 * @param string $sha2salt 492 * @access private 493 * @return string 494 */ 495 private static function bcrypt_hash($sha2pass, $sha2salt) 496 { 497 $p = self::$parray; 498 $sbox0 = self::$sbox0; 499 $sbox1 = self::$sbox1; 500 $sbox2 = self::$sbox2; 501 $sbox3 = self::$sbox3; 502 503 $cdata = array_values(unpack('N*', 'OxychromaticBlowfishSwatDynamite')); 504 $sha2pass = array_values(unpack('N*', $sha2pass)); 505 $sha2salt = array_values(unpack('N*', $sha2salt)); 506 507 self::expandstate($sha2salt, $sha2pass, $sbox0, $sbox1, $sbox2, $sbox3, $p); 508 for ($i = 0; $i < 64; $i++) { 509 self::expand0state($sha2salt, $sbox0, $sbox1, $sbox2, $sbox3, $p); 510 self::expand0state($sha2pass, $sbox0, $sbox1, $sbox2, $sbox3, $p); 511 } 512 513 for ($i = 0; $i < 64; $i++) { 514 for ($j = 0; $j < 8; $j += 2) { // count($cdata) == 8 515 list($cdata[$j], $cdata[$j + 1]) = self::encryptBlockHelperFast($cdata[$j], $cdata[$j + 1], $sbox0, $sbox1, $sbox2, $sbox3, $p); 516 } 517 } 518 519 return pack('L*', ...$cdata); 520 } 521 522 /** 523 * Performs OpenSSH-style bcrypt 524 * 525 * @param string $pass 526 * @param string $salt 527 * @param int $keylen 528 * @param int $rounds 529 * @access public 530 * @return string 531 */ 532 public static function bcrypt_pbkdf($pass, $salt, $keylen, $rounds) 533 { 534 self::initialize_static_variables(); 535 536 if (PHP_INT_SIZE == 4) { 537 throw new \RuntimeException('bcrypt is far too slow to be practical on 32-bit versions of PHP'); 538 } 539 540 $sha2pass = hash('sha512', $pass, true); 541 $results = []; 542 $count = 1; 543 while (32 * count($results) < $keylen) { 544 $countsalt = $salt . pack('N', $count++); 545 $sha2salt = hash('sha512', $countsalt, true); 546 $out = $tmpout = self::bcrypt_hash($sha2pass, $sha2salt); 547 for ($i = 1; $i < $rounds; $i++) { 548 $sha2salt = hash('sha512', $tmpout, true); 549 $tmpout = self::bcrypt_hash($sha2pass, $sha2salt); 550 $out ^= $tmpout; 551 } 552 $results[] = $out; 553 } 554 $output = ''; 555 for ($i = 0; $i < 32; $i++) { 556 foreach ($results as $result) { 557 $output .= $result[$i]; 558 } 559 } 560 return substr($output, 0, $keylen); 561 } 562 563 /** 564 * Key expansion without salt 565 * 566 * @access private 567 * @param int[] $key 568 * @param int[] $sbox0 569 * @param int[] $sbox1 570 * @param int[] $sbox2 571 * @param int[] $sbox3 572 * @param int[] $p 573 * @see self::_bcrypt_hash() 574 */ 575 private static function expand0state(array $key, array &$sbox0, array &$sbox1, array &$sbox2, array &$sbox3, array &$p) 576 { 577 // expand0state is basically the same thing as this: 578 //return self::expandstate(array_fill(0, 16, 0), $key); 579 // but this separate function eliminates a bunch of XORs and array lookups 580 581 $p = [ 582 $p[0] ^ $key[0], 583 $p[1] ^ $key[1], 584 $p[2] ^ $key[2], 585 $p[3] ^ $key[3], 586 $p[4] ^ $key[4], 587 $p[5] ^ $key[5], 588 $p[6] ^ $key[6], 589 $p[7] ^ $key[7], 590 $p[8] ^ $key[8], 591 $p[9] ^ $key[9], 592 $p[10] ^ $key[10], 593 $p[11] ^ $key[11], 594 $p[12] ^ $key[12], 595 $p[13] ^ $key[13], 596 $p[14] ^ $key[14], 597 $p[15] ^ $key[15], 598 $p[16] ^ $key[0], 599 $p[17] ^ $key[1] 600 ]; 601 602 // @codingStandardsIgnoreStart 603 list( $p[0], $p[1]) = self::encryptBlockHelperFast( 0, 0, $sbox0, $sbox1, $sbox2, $sbox3, $p); 604 list( $p[2], $p[3]) = self::encryptBlockHelperFast($p[ 0], $p[ 1], $sbox0, $sbox1, $sbox2, $sbox3, $p); 605 list( $p[4], $p[5]) = self::encryptBlockHelperFast($p[ 2], $p[ 3], $sbox0, $sbox1, $sbox2, $sbox3, $p); 606 list( $p[6], $p[7]) = self::encryptBlockHelperFast($p[ 4], $p[ 5], $sbox0, $sbox1, $sbox2, $sbox3, $p); 607 list( $p[8], $p[9]) = self::encryptBlockHelperFast($p[ 6], $p[ 7], $sbox0, $sbox1, $sbox2, $sbox3, $p); 608 list($p[10], $p[11]) = self::encryptBlockHelperFast($p[ 8], $p[ 9], $sbox0, $sbox1, $sbox2, $sbox3, $p); 609 list($p[12], $p[13]) = self::encryptBlockHelperFast($p[10], $p[11], $sbox0, $sbox1, $sbox2, $sbox3, $p); 610 list($p[14], $p[15]) = self::encryptBlockHelperFast($p[12], $p[13], $sbox0, $sbox1, $sbox2, $sbox3, $p); 611 list($p[16], $p[17]) = self::encryptBlockHelperFast($p[14], $p[15], $sbox0, $sbox1, $sbox2, $sbox3, $p); 612 // @codingStandardsIgnoreEnd 613 614 list($sbox0[0], $sbox0[1]) = self::encryptBlockHelperFast($p[16], $p[17], $sbox0, $sbox1, $sbox2, $sbox3, $p); 615 for ($i = 2; $i < 256; $i += 2) { 616 list($sbox0[$i], $sbox0[$i + 1]) = self::encryptBlockHelperFast($sbox0[$i - 2], $sbox0[$i - 1], $sbox0, $sbox1, $sbox2, $sbox3, $p); 617 } 618 619 list($sbox1[0], $sbox1[1]) = self::encryptBlockHelperFast($sbox0[254], $sbox0[255], $sbox0, $sbox1, $sbox2, $sbox3, $p); 620 for ($i = 2; $i < 256; $i += 2) { 621 list($sbox1[$i], $sbox1[$i + 1]) = self::encryptBlockHelperFast($sbox1[$i - 2], $sbox1[$i - 1], $sbox0, $sbox1, $sbox2, $sbox3, $p); 622 } 623 624 list($sbox2[0], $sbox2[1]) = self::encryptBlockHelperFast($sbox1[254], $sbox1[255], $sbox0, $sbox1, $sbox2, $sbox3, $p); 625 for ($i = 2; $i < 256; $i += 2) { 626 list($sbox2[$i], $sbox2[$i + 1]) = self::encryptBlockHelperFast($sbox2[$i - 2], $sbox2[$i - 1], $sbox0, $sbox1, $sbox2, $sbox3, $p); 627 } 628 629 list($sbox3[0], $sbox3[1]) = self::encryptBlockHelperFast($sbox2[254], $sbox2[255], $sbox0, $sbox1, $sbox2, $sbox3, $p); 630 for ($i = 2; $i < 256; $i += 2) { 631 list($sbox3[$i], $sbox3[$i + 1]) = self::encryptBlockHelperFast($sbox3[$i - 2], $sbox3[$i - 1], $sbox0, $sbox1, $sbox2, $sbox3, $p); 632 } 633 } 634 635 /** 636 * Key expansion with salt 637 * 638 * @access private 639 * @param int[] $data 640 * @param int[] $key 641 * @param int[] $sbox0 642 * @param int[] $sbox1 643 * @param int[] $sbox2 644 * @param int[] $sbox3 645 * @param int[] $p 646 * @see self::_bcrypt_hash() 647 */ 648 private static function expandstate(array $data, array $key, array &$sbox0, array &$sbox1, array &$sbox2, array &$sbox3, array &$p) 649 { 650 $p = [ 651 $p[0] ^ $key[0], 652 $p[1] ^ $key[1], 653 $p[2] ^ $key[2], 654 $p[3] ^ $key[3], 655 $p[4] ^ $key[4], 656 $p[5] ^ $key[5], 657 $p[6] ^ $key[6], 658 $p[7] ^ $key[7], 659 $p[8] ^ $key[8], 660 $p[9] ^ $key[9], 661 $p[10] ^ $key[10], 662 $p[11] ^ $key[11], 663 $p[12] ^ $key[12], 664 $p[13] ^ $key[13], 665 $p[14] ^ $key[14], 666 $p[15] ^ $key[15], 667 $p[16] ^ $key[0], 668 $p[17] ^ $key[1] 669 ]; 670 671 // @codingStandardsIgnoreStart 672 list( $p[0], $p[1]) = self::encryptBlockHelperFast($data[ 0] , $data[ 1] , $sbox0, $sbox1, $sbox2, $sbox3, $p); 673 list( $p[2], $p[3]) = self::encryptBlockHelperFast($data[ 2] ^ $p[ 0], $data[ 3] ^ $p[ 1], $sbox0, $sbox1, $sbox2, $sbox3, $p); 674 list( $p[4], $p[5]) = self::encryptBlockHelperFast($data[ 4] ^ $p[ 2], $data[ 5] ^ $p[ 3], $sbox0, $sbox1, $sbox2, $sbox3, $p); 675 list( $p[6], $p[7]) = self::encryptBlockHelperFast($data[ 6] ^ $p[ 4], $data[ 7] ^ $p[ 5], $sbox0, $sbox1, $sbox2, $sbox3, $p); 676 list( $p[8], $p[9]) = self::encryptBlockHelperFast($data[ 8] ^ $p[ 6], $data[ 9] ^ $p[ 7], $sbox0, $sbox1, $sbox2, $sbox3, $p); 677 list($p[10], $p[11]) = self::encryptBlockHelperFast($data[10] ^ $p[ 8], $data[11] ^ $p[ 9], $sbox0, $sbox1, $sbox2, $sbox3, $p); 678 list($p[12], $p[13]) = self::encryptBlockHelperFast($data[12] ^ $p[10], $data[13] ^ $p[11], $sbox0, $sbox1, $sbox2, $sbox3, $p); 679 list($p[14], $p[15]) = self::encryptBlockHelperFast($data[14] ^ $p[12], $data[15] ^ $p[13], $sbox0, $sbox1, $sbox2, $sbox3, $p); 680 list($p[16], $p[17]) = self::encryptBlockHelperFast($data[ 0] ^ $p[14], $data[ 1] ^ $p[15], $sbox0, $sbox1, $sbox2, $sbox3, $p); 681 // @codingStandardsIgnoreEnd 682 683 list($sbox0[0], $sbox0[1]) = self::encryptBlockHelperFast($data[2] ^ $p[16], $data[3] ^ $p[17], $sbox0, $sbox1, $sbox2, $sbox3, $p); 684 for ($i = 2, $j = 4; $i < 256; $i += 2, $j = ($j + 2) % 16) { // instead of 16 maybe count($data) would be better? 685 list($sbox0[$i], $sbox0[$i + 1]) = self::encryptBlockHelperFast($data[$j] ^ $sbox0[$i - 2], $data[$j + 1] ^ $sbox0[$i - 1], $sbox0, $sbox1, $sbox2, $sbox3, $p); 686 } 687 688 list($sbox1[0], $sbox1[1]) = self::encryptBlockHelperFast($data[2] ^ $sbox0[254], $data[3] ^ $sbox0[255], $sbox0, $sbox1, $sbox2, $sbox3, $p); 689 for ($i = 2, $j = 4; $i < 256; $i += 2, $j = ($j + 2) % 16) { 690 list($sbox1[$i], $sbox1[$i + 1]) = self::encryptBlockHelperFast($data[$j] ^ $sbox1[$i - 2], $data[$j + 1] ^ $sbox1[$i - 1], $sbox0, $sbox1, $sbox2, $sbox3, $p); 691 } 692 693 list($sbox2[0], $sbox2[1]) = self::encryptBlockHelperFast($data[2] ^ $sbox1[254], $data[3] ^ $sbox1[255], $sbox0, $sbox1, $sbox2, $sbox3, $p); 694 for ($i = 2, $j = 4; $i < 256; $i += 2, $j = ($j + 2) % 16) { 695 list($sbox2[$i], $sbox2[$i + 1]) = self::encryptBlockHelperFast($data[$j] ^ $sbox2[$i - 2], $data[$j + 1] ^ $sbox2[$i - 1], $sbox0, $sbox1, $sbox2, $sbox3, $p); 696 } 697 698 list($sbox3[0], $sbox3[1]) = self::encryptBlockHelperFast($data[2] ^ $sbox2[254], $data[3] ^ $sbox2[255], $sbox0, $sbox1, $sbox2, $sbox3, $p); 699 for ($i = 2, $j = 4; $i < 256; $i += 2, $j = ($j + 2) % 16) { 700 list($sbox3[$i], $sbox3[$i + 1]) = self::encryptBlockHelperFast($data[$j] ^ $sbox3[$i - 2], $data[$j + 1] ^ $sbox3[$i - 1], $sbox0, $sbox1, $sbox2, $sbox3, $p); 701 } 702 } 703 704 /** 705 * Encrypts a block 706 * 707 * @param string $in 708 * @return string 709 */ 710 protected function encryptBlock($in) 711 { 712 $p = $this->bctx['p']; 713 // extract($this->bctx['sb'], EXTR_PREFIX_ALL, 'sb'); // slower 714 $sb_0 = $this->bctx['sb'][0]; 715 $sb_1 = $this->bctx['sb'][1]; 716 $sb_2 = $this->bctx['sb'][2]; 717 $sb_3 = $this->bctx['sb'][3]; 718 719 $in = unpack('N*', $in); 720 $l = $in[1]; 721 $r = $in[2]; 722 723 list($r, $l) = PHP_INT_SIZE == 4 ? 724 self::encryptBlockHelperSlow($l, $r, $sb_0, $sb_1, $sb_2, $sb_3, $p) : 725 self::encryptBlockHelperFast($l, $r, $sb_0, $sb_1, $sb_2, $sb_3, $p); 726 727 return pack("N*", $r, $l); 728 } 729 730 /** 731 * Fast helper function for block encryption 732 * 733 * @access private 734 * @param int $x0 735 * @param int $x1 736 * @param int[] $sbox0 737 * @param int[] $sbox1 738 * @param int[] $sbox2 739 * @param int[] $sbox3 740 * @param int[] $p 741 * @return int[] 742 */ 743 private static function encryptBlockHelperFast($x0, $x1, array $sbox0, array $sbox1, array $sbox2, array $sbox3, array $p) 744 { 745 $x0 ^= $p[0]; 746 $x1 ^= ((($sbox0[($x0 & 0xFF000000) >> 24] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[1]; 747 $x0 ^= ((($sbox0[($x1 & 0xFF000000) >> 24] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[2]; 748 $x1 ^= ((($sbox0[($x0 & 0xFF000000) >> 24] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[3]; 749 $x0 ^= ((($sbox0[($x1 & 0xFF000000) >> 24] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[4]; 750 $x1 ^= ((($sbox0[($x0 & 0xFF000000) >> 24] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[5]; 751 $x0 ^= ((($sbox0[($x1 & 0xFF000000) >> 24] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[6]; 752 $x1 ^= ((($sbox0[($x0 & 0xFF000000) >> 24] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[7]; 753 $x0 ^= ((($sbox0[($x1 & 0xFF000000) >> 24] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[8]; 754 $x1 ^= ((($sbox0[($x0 & 0xFF000000) >> 24] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[9]; 755 $x0 ^= ((($sbox0[($x1 & 0xFF000000) >> 24] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[10]; 756 $x1 ^= ((($sbox0[($x0 & 0xFF000000) >> 24] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[11]; 757 $x0 ^= ((($sbox0[($x1 & 0xFF000000) >> 24] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[12]; 758 $x1 ^= ((($sbox0[($x0 & 0xFF000000) >> 24] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[13]; 759 $x0 ^= ((($sbox0[($x1 & 0xFF000000) >> 24] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[14]; 760 $x1 ^= ((($sbox0[($x0 & 0xFF000000) >> 24] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[15]; 761 $x0 ^= ((($sbox0[($x1 & 0xFF000000) >> 24] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[16]; 762 763 return [$x1 & 0xFFFFFFFF ^ $p[17], $x0 & 0xFFFFFFFF]; 764 } 765 766 /** 767 * Slow helper function for block encryption 768 * 769 * @access private 770 * @param int $x0 771 * @param int $x1 772 * @param int[] $sbox0 773 * @param int[] $sbox1 774 * @param int[] $sbox2 775 * @param int[] $sbox3 776 * @param int[] $p 777 * @return int[] 778 */ 779 private static function encryptBlockHelperSlow($x0, $x1, array $sbox0, array $sbox1, array $sbox2, array $sbox3, array $p) 780 { 781 // -16777216 == intval(0xFF000000) on 32-bit PHP installs 782 $x0 ^= $p[0]; 783 $x1 ^= self::safe_intval((self::safe_intval($sbox0[(($x0 & -16777216) >> 24) & 0xFF] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[1]; 784 $x0 ^= self::safe_intval((self::safe_intval($sbox0[(($x1 & -16777216) >> 24) & 0xFF] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[2]; 785 $x1 ^= self::safe_intval((self::safe_intval($sbox0[(($x0 & -16777216) >> 24) & 0xFF] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[3]; 786 $x0 ^= self::safe_intval((self::safe_intval($sbox0[(($x1 & -16777216) >> 24) & 0xFF] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[4]; 787 $x1 ^= self::safe_intval((self::safe_intval($sbox0[(($x0 & -16777216) >> 24) & 0xFF] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[5]; 788 $x0 ^= self::safe_intval((self::safe_intval($sbox0[(($x1 & -16777216) >> 24) & 0xFF] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[6]; 789 $x1 ^= self::safe_intval((self::safe_intval($sbox0[(($x0 & -16777216) >> 24) & 0xFF] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[7]; 790 $x0 ^= self::safe_intval((self::safe_intval($sbox0[(($x1 & -16777216) >> 24) & 0xFF] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[8]; 791 $x1 ^= self::safe_intval((self::safe_intval($sbox0[(($x0 & -16777216) >> 24) & 0xFF] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[9]; 792 $x0 ^= self::safe_intval((self::safe_intval($sbox0[(($x1 & -16777216) >> 24) & 0xFF] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[10]; 793 $x1 ^= self::safe_intval((self::safe_intval($sbox0[(($x0 & -16777216) >> 24) & 0xFF] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[11]; 794 $x0 ^= self::safe_intval((self::safe_intval($sbox0[(($x1 & -16777216) >> 24) & 0xFF] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[12]; 795 $x1 ^= self::safe_intval((self::safe_intval($sbox0[(($x0 & -16777216) >> 24) & 0xFF] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[13]; 796 $x0 ^= self::safe_intval((self::safe_intval($sbox0[(($x1 & -16777216) >> 24) & 0xFF] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[14]; 797 $x1 ^= self::safe_intval((self::safe_intval($sbox0[(($x0 & -16777216) >> 24) & 0xFF] + $sbox1[($x0 & 0xFF0000) >> 16]) ^ $sbox2[($x0 & 0xFF00) >> 8]) + $sbox3[$x0 & 0xFF]) ^ $p[15]; 798 $x0 ^= self::safe_intval((self::safe_intval($sbox0[(($x1 & -16777216) >> 24) & 0xFF] + $sbox1[($x1 & 0xFF0000) >> 16]) ^ $sbox2[($x1 & 0xFF00) >> 8]) + $sbox3[$x1 & 0xFF]) ^ $p[16]; 799 800 return [$x1 ^ $p[17], $x0]; 801 } 802 803 /** 804 * Decrypts a block 805 * 806 * @param string $in 807 * @return string 808 */ 809 protected function decryptBlock($in) 810 { 811 $p = $this->bctx['p']; 812 $sb_0 = $this->bctx['sb'][0]; 813 $sb_1 = $this->bctx['sb'][1]; 814 $sb_2 = $this->bctx['sb'][2]; 815 $sb_3 = $this->bctx['sb'][3]; 816 817 $in = unpack('N*', $in); 818 $l = $in[1]; 819 $r = $in[2]; 820 821 for ($i = 17; $i > 2; $i -= 2) { 822 $l ^= $p[$i]; 823 $r ^= self::safe_intval((self::safe_intval($sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff]) ^ 824 $sb_2[$l >> 8 & 0xff]) + 825 $sb_3[$l & 0xff]); 826 827 $r ^= $p[$i - 1]; 828 $l ^= self::safe_intval((self::safe_intval($sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff]) ^ 829 $sb_2[$r >> 8 & 0xff]) + 830 $sb_3[$r & 0xff]); 831 } 832 return pack('N*', $r ^ $p[0], $l ^ $p[1]); 833 } 834 835 /** 836 * Setup the performance-optimized function for de/encrypt() 837 * 838 * @see \phpseclib3\Crypt\Common\SymmetricKey::_setupInlineCrypt() 839 */ 840 protected function setupInlineCrypt() 841 { 842 $p = $this->bctx['p']; 843 $init_crypt = ' 844 static $sb_0, $sb_1, $sb_2, $sb_3; 845 if (!$sb_0) { 846 $sb_0 = $this->bctx["sb"][0]; 847 $sb_1 = $this->bctx["sb"][1]; 848 $sb_2 = $this->bctx["sb"][2]; 849 $sb_3 = $this->bctx["sb"][3]; 850 } 851 '; 852 853 $safeint = self::safe_intval_inline(); 854 855 // Generating encrypt code: 856 $encrypt_block = ' 857 $in = unpack("N*", $in); 858 $l = $in[1]; 859 $r = $in[2]; 860 '; 861 for ($i = 0; $i < 16; $i += 2) { 862 $encrypt_block .= ' 863 $l^= ' . $p[$i] . '; 864 $r^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff]') . ' ^ 865 $sb_2[$l >> 8 & 0xff]) + 866 $sb_3[$l & 0xff]') . '; 867 868 $r^= ' . $p[$i + 1] . '; 869 $l^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff]') . ' ^ 870 $sb_2[$r >> 8 & 0xff]) + 871 $sb_3[$r & 0xff]') . '; 872 '; 873 } 874 $encrypt_block .= ' 875 $in = pack("N*", 876 $r ^ ' . $p[17] . ', 877 $l ^ ' . $p[16] . ' 878 ); 879 '; 880 // Generating decrypt code: 881 $decrypt_block = ' 882 $in = unpack("N*", $in); 883 $l = $in[1]; 884 $r = $in[2]; 885 '; 886 887 for ($i = 17; $i > 2; $i -= 2) { 888 $decrypt_block .= ' 889 $l^= ' . $p[$i] . '; 890 $r^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$l >> 24 & 0xff] + $sb_1[$l >> 16 & 0xff]') . ' ^ 891 $sb_2[$l >> 8 & 0xff]) + 892 $sb_3[$l & 0xff]') . '; 893 894 $r^= ' . $p[$i - 1] . '; 895 $l^= ' . sprintf($safeint, '(' . sprintf($safeint, '$sb_0[$r >> 24 & 0xff] + $sb_1[$r >> 16 & 0xff]') . ' ^ 896 $sb_2[$r >> 8 & 0xff]) + 897 $sb_3[$r & 0xff]') . '; 898 '; 899 } 900 901 $decrypt_block .= ' 902 $in = pack("N*", 903 $r ^ ' . $p[0] . ', 904 $l ^ ' . $p[1] . ' 905 ); 906 '; 907 908 $this->inline_crypt = $this->createInlineCryptFunction( 909 [ 910 'init_crypt' => $init_crypt, 911 'init_encrypt' => '', 912 'init_decrypt' => '', 913 'encrypt_block' => $encrypt_block, 914 'decrypt_block' => $decrypt_block 915 ] 916 ); 917 } 918 }
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