Annotation of embedaddon/php/ext/standard/crypt_blowfish.c, revision 1.1
1.1 ! misho 1: /* $Id: crypt_blowfish.c 313406 2011-07-18 21:26:29Z pajoye $ */
! 2: /*
! 3: * The crypt_blowfish homepage is:
! 4: *
! 5: * http://www.openwall.com/crypt/
! 6: *
! 7: * This code comes from John the Ripper password cracker, with reentrant
! 8: * and crypt(3) interfaces added, but optimizations specific to password
! 9: * cracking removed.
! 10: *
! 11: * Written by Solar Designer <solar at openwall.com> in 1998-2011.
! 12: * No copyright is claimed, and the software is hereby placed in the public
! 13: * domain. In case this attempt to disclaim copyright and place the software
! 14: * in the public domain is deemed null and void, then the software is
! 15: * Copyright (c) 1998-2011 Solar Designer and it is hereby released to the
! 16: * general public under the following terms:
! 17: *
! 18: * Redistribution and use in source and binary forms, with or without
! 19: * modification, are permitted.
! 20: *
! 21: * There's ABSOLUTELY NO WARRANTY, express or implied.
! 22: *
! 23: * It is my intent that you should be able to use this on your system,
! 24: * as part of a software package, or anywhere else to improve security,
! 25: * ensure compatibility, or for any other purpose. I would appreciate
! 26: * it if you give credit where it is due and keep your modifications in
! 27: * the public domain as well, but I don't require that in order to let
! 28: * you place this code and any modifications you make under a license
! 29: * of your choice.
! 30: *
! 31: * This implementation is mostly compatible with OpenBSD's bcrypt.c (prefix
! 32: * "$2a$") by Niels Provos <provos at citi.umich.edu>, and uses some of his
! 33: * ideas. The password hashing algorithm was designed by David Mazieres
! 34: * <dm at lcs.mit.edu>. For more information on the level of compatibility,
! 35: * please refer to the comments in BF_set_key() below and to the crypt(3)
! 36: * man page included in the crypt_blowfish tarball.
! 37: *
! 38: * There's a paper on the algorithm that explains its design decisions:
! 39: *
! 40: * http://www.usenix.org/events/usenix99/provos.html
! 41: *
! 42: * Some of the tricks in BF_ROUND might be inspired by Eric Young's
! 43: * Blowfish library (I can't be sure if I would think of something if I
! 44: * hadn't seen his code).
! 45: */
! 46:
! 47: #include <string.h>
! 48:
! 49: #include <errno.h>
! 50: #ifndef __set_errno
! 51: #define __set_errno(val) errno = (val)
! 52: #endif
! 53:
! 54: /* Just to make sure the prototypes match the actual definitions */
! 55: #include "crypt_blowfish.h"
! 56:
! 57: #ifdef __i386__
! 58: #define BF_ASM 0
! 59: #define BF_SCALE 1
! 60: #elif defined(__x86_64__) || defined(__alpha__) || defined(__hppa__)
! 61: #define BF_ASM 0
! 62: #define BF_SCALE 1
! 63: #else
! 64: #define BF_ASM 0
! 65: #define BF_SCALE 0
! 66: #endif
! 67:
! 68: typedef unsigned int BF_word;
! 69: typedef signed int BF_word_signed;
! 70:
! 71: /* Number of Blowfish rounds, this is also hardcoded into a few places */
! 72: #define BF_N 16
! 73:
! 74: typedef BF_word BF_key[BF_N + 2];
! 75:
! 76: typedef struct {
! 77: BF_word S[4][0x100];
! 78: BF_key P;
! 79: } BF_ctx;
! 80:
! 81: /*
! 82: * Magic IV for 64 Blowfish encryptions that we do at the end.
! 83: * The string is "OrpheanBeholderScryDoubt" on big-endian.
! 84: */
! 85: static BF_word BF_magic_w[6] = {
! 86: 0x4F727068, 0x65616E42, 0x65686F6C,
! 87: 0x64657253, 0x63727944, 0x6F756274
! 88: };
! 89:
! 90: /*
! 91: * P-box and S-box tables initialized with digits of Pi.
! 92: */
! 93: static BF_ctx BF_init_state = {
! 94: {
! 95: {
! 96: 0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
! 97: 0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
! 98: 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
! 99: 0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
! 100: 0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
! 101: 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
! 102: 0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
! 103: 0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
! 104: 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
! 105: 0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
! 106: 0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
! 107: 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
! 108: 0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
! 109: 0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
! 110: 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
! 111: 0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
! 112: 0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
! 113: 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
! 114: 0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
! 115: 0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
! 116: 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
! 117: 0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
! 118: 0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
! 119: 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
! 120: 0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
! 121: 0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
! 122: 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
! 123: 0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
! 124: 0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
! 125: 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
! 126: 0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
! 127: 0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
! 128: 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
! 129: 0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
! 130: 0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
! 131: 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
! 132: 0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
! 133: 0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
! 134: 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
! 135: 0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
! 136: 0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
! 137: 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
! 138: 0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
! 139: 0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
! 140: 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
! 141: 0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
! 142: 0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
! 143: 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
! 144: 0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
! 145: 0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
! 146: 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
! 147: 0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
! 148: 0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
! 149: 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
! 150: 0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
! 151: 0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
! 152: 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
! 153: 0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
! 154: 0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
! 155: 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
! 156: 0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
! 157: 0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
! 158: 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
! 159: 0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a
! 160: }, {
! 161: 0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
! 162: 0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
! 163: 0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
! 164: 0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
! 165: 0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
! 166: 0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
! 167: 0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
! 168: 0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
! 169: 0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
! 170: 0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
! 171: 0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
! 172: 0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
! 173: 0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
! 174: 0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
! 175: 0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
! 176: 0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
! 177: 0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
! 178: 0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
! 179: 0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
! 180: 0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
! 181: 0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
! 182: 0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
! 183: 0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
! 184: 0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
! 185: 0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
! 186: 0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
! 187: 0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
! 188: 0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
! 189: 0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
! 190: 0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
! 191: 0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
! 192: 0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
! 193: 0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
! 194: 0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
! 195: 0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
! 196: 0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
! 197: 0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
! 198: 0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
! 199: 0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
! 200: 0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
! 201: 0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
! 202: 0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
! 203: 0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
! 204: 0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
! 205: 0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
! 206: 0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
! 207: 0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
! 208: 0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
! 209: 0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
! 210: 0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
! 211: 0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
! 212: 0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
! 213: 0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
! 214: 0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
! 215: 0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
! 216: 0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
! 217: 0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
! 218: 0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
! 219: 0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
! 220: 0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
! 221: 0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
! 222: 0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
! 223: 0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
! 224: 0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7
! 225: }, {
! 226: 0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
! 227: 0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
! 228: 0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
! 229: 0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
! 230: 0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
! 231: 0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
! 232: 0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
! 233: 0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
! 234: 0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
! 235: 0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
! 236: 0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
! 237: 0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
! 238: 0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
! 239: 0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
! 240: 0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
! 241: 0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
! 242: 0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
! 243: 0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
! 244: 0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
! 245: 0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
! 246: 0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
! 247: 0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
! 248: 0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
! 249: 0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
! 250: 0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
! 251: 0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
! 252: 0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
! 253: 0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
! 254: 0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
! 255: 0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
! 256: 0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
! 257: 0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
! 258: 0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
! 259: 0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
! 260: 0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
! 261: 0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
! 262: 0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
! 263: 0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
! 264: 0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
! 265: 0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
! 266: 0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
! 267: 0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
! 268: 0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
! 269: 0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
! 270: 0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
! 271: 0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
! 272: 0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
! 273: 0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
! 274: 0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
! 275: 0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
! 276: 0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
! 277: 0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
! 278: 0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
! 279: 0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
! 280: 0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
! 281: 0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
! 282: 0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
! 283: 0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
! 284: 0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
! 285: 0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
! 286: 0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
! 287: 0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
! 288: 0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
! 289: 0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0
! 290: }, {
! 291: 0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
! 292: 0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
! 293: 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
! 294: 0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
! 295: 0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
! 296: 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
! 297: 0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
! 298: 0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
! 299: 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
! 300: 0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
! 301: 0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
! 302: 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
! 303: 0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
! 304: 0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
! 305: 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
! 306: 0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
! 307: 0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
! 308: 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
! 309: 0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
! 310: 0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
! 311: 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
! 312: 0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
! 313: 0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
! 314: 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
! 315: 0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
! 316: 0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
! 317: 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
! 318: 0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
! 319: 0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
! 320: 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
! 321: 0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
! 322: 0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
! 323: 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
! 324: 0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
! 325: 0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
! 326: 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
! 327: 0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
! 328: 0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
! 329: 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
! 330: 0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
! 331: 0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
! 332: 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
! 333: 0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
! 334: 0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
! 335: 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
! 336: 0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
! 337: 0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
! 338: 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
! 339: 0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
! 340: 0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
! 341: 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
! 342: 0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
! 343: 0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
! 344: 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
! 345: 0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
! 346: 0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
! 347: 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
! 348: 0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
! 349: 0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
! 350: 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
! 351: 0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
! 352: 0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
! 353: 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
! 354: 0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6
! 355: }
! 356: }, {
! 357: 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
! 358: 0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
! 359: 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
! 360: 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
! 361: 0x9216d5d9, 0x8979fb1b
! 362: }
! 363: };
! 364:
! 365: static unsigned char BF_itoa64[64 + 1] =
! 366: "./ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
! 367:
! 368: static unsigned char BF_atoi64[0x60] = {
! 369: 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 0, 1,
! 370: 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 64, 64, 64, 64, 64,
! 371: 64, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
! 372: 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 64, 64, 64, 64, 64,
! 373: 64, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42,
! 374: 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 64, 64, 64, 64, 64
! 375: };
! 376:
! 377: #define BF_safe_atoi64(dst, src) \
! 378: { \
! 379: tmp = (unsigned char)(src); \
! 380: if (tmp == '$') break; /* PHP hack */ \
! 381: if ((unsigned int)(tmp -= 0x20) >= 0x60) return -1; \
! 382: tmp = BF_atoi64[tmp]; \
! 383: if (tmp > 63) return -1; \
! 384: (dst) = tmp; \
! 385: }
! 386:
! 387: static int BF_decode(BF_word *dst, const char *src, int size)
! 388: {
! 389: unsigned char *dptr = (unsigned char *)dst;
! 390: unsigned char *end = dptr + size;
! 391: const unsigned char *sptr = (const unsigned char *)src;
! 392: unsigned int tmp, c1, c2, c3, c4;
! 393:
! 394: do {
! 395: BF_safe_atoi64(c1, *sptr++);
! 396: BF_safe_atoi64(c2, *sptr++);
! 397: *dptr++ = (c1 << 2) | ((c2 & 0x30) >> 4);
! 398: if (dptr >= end) break;
! 399:
! 400: BF_safe_atoi64(c3, *sptr++);
! 401: *dptr++ = ((c2 & 0x0F) << 4) | ((c3 & 0x3C) >> 2);
! 402: if (dptr >= end) break;
! 403:
! 404: BF_safe_atoi64(c4, *sptr++);
! 405: *dptr++ = ((c3 & 0x03) << 6) | c4;
! 406: } while (dptr < end);
! 407:
! 408: while (dptr < end) /* PHP hack */
! 409: *dptr++ = 0;
! 410:
! 411: return 0;
! 412: }
! 413:
! 414: static void BF_encode(char *dst, const BF_word *src, int size)
! 415: {
! 416: const unsigned char *sptr = (const unsigned char *)src;
! 417: const unsigned char *end = sptr + size;
! 418: unsigned char *dptr = (unsigned char *)dst;
! 419: unsigned int c1, c2;
! 420:
! 421: do {
! 422: c1 = *sptr++;
! 423: *dptr++ = BF_itoa64[c1 >> 2];
! 424: c1 = (c1 & 0x03) << 4;
! 425: if (sptr >= end) {
! 426: *dptr++ = BF_itoa64[c1];
! 427: break;
! 428: }
! 429:
! 430: c2 = *sptr++;
! 431: c1 |= c2 >> 4;
! 432: *dptr++ = BF_itoa64[c1];
! 433: c1 = (c2 & 0x0f) << 2;
! 434: if (sptr >= end) {
! 435: *dptr++ = BF_itoa64[c1];
! 436: break;
! 437: }
! 438:
! 439: c2 = *sptr++;
! 440: c1 |= c2 >> 6;
! 441: *dptr++ = BF_itoa64[c1];
! 442: *dptr++ = BF_itoa64[c2 & 0x3f];
! 443: } while (sptr < end);
! 444: }
! 445:
! 446: static void BF_swap(BF_word *x, int count)
! 447: {
! 448: static int endianness_check = 1;
! 449: char *is_little_endian = (char *)&endianness_check;
! 450: BF_word tmp;
! 451:
! 452: if (*is_little_endian)
! 453: do {
! 454: tmp = *x;
! 455: tmp = (tmp << 16) | (tmp >> 16);
! 456: *x++ = ((tmp & 0x00FF00FF) << 8) | ((tmp >> 8) & 0x00FF00FF);
! 457: } while (--count);
! 458: }
! 459:
! 460: #if BF_SCALE
! 461: /* Architectures which can shift addresses left by 2 bits with no extra cost */
! 462: #define BF_ROUND(L, R, N) \
! 463: tmp1 = L & 0xFF; \
! 464: tmp2 = L >> 8; \
! 465: tmp2 &= 0xFF; \
! 466: tmp3 = L >> 16; \
! 467: tmp3 &= 0xFF; \
! 468: tmp4 = L >> 24; \
! 469: tmp1 = data.ctx.S[3][tmp1]; \
! 470: tmp2 = data.ctx.S[2][tmp2]; \
! 471: tmp3 = data.ctx.S[1][tmp3]; \
! 472: tmp3 += data.ctx.S[0][tmp4]; \
! 473: tmp3 ^= tmp2; \
! 474: R ^= data.ctx.P[N + 1]; \
! 475: tmp3 += tmp1; \
! 476: R ^= tmp3;
! 477: #else
! 478: /* Architectures with no complicated addressing modes supported */
! 479: #define BF_INDEX(S, i) \
! 480: (*((BF_word *)(((unsigned char *)S) + (i))))
! 481: #define BF_ROUND(L, R, N) \
! 482: tmp1 = L & 0xFF; \
! 483: tmp1 <<= 2; \
! 484: tmp2 = L >> 6; \
! 485: tmp2 &= 0x3FC; \
! 486: tmp3 = L >> 14; \
! 487: tmp3 &= 0x3FC; \
! 488: tmp4 = L >> 22; \
! 489: tmp4 &= 0x3FC; \
! 490: tmp1 = BF_INDEX(data.ctx.S[3], tmp1); \
! 491: tmp2 = BF_INDEX(data.ctx.S[2], tmp2); \
! 492: tmp3 = BF_INDEX(data.ctx.S[1], tmp3); \
! 493: tmp3 += BF_INDEX(data.ctx.S[0], tmp4); \
! 494: tmp3 ^= tmp2; \
! 495: R ^= data.ctx.P[N + 1]; \
! 496: tmp3 += tmp1; \
! 497: R ^= tmp3;
! 498: #endif
! 499:
! 500: /*
! 501: * Encrypt one block, BF_N is hardcoded here.
! 502: */
! 503: #define BF_ENCRYPT \
! 504: L ^= data.ctx.P[0]; \
! 505: BF_ROUND(L, R, 0); \
! 506: BF_ROUND(R, L, 1); \
! 507: BF_ROUND(L, R, 2); \
! 508: BF_ROUND(R, L, 3); \
! 509: BF_ROUND(L, R, 4); \
! 510: BF_ROUND(R, L, 5); \
! 511: BF_ROUND(L, R, 6); \
! 512: BF_ROUND(R, L, 7); \
! 513: BF_ROUND(L, R, 8); \
! 514: BF_ROUND(R, L, 9); \
! 515: BF_ROUND(L, R, 10); \
! 516: BF_ROUND(R, L, 11); \
! 517: BF_ROUND(L, R, 12); \
! 518: BF_ROUND(R, L, 13); \
! 519: BF_ROUND(L, R, 14); \
! 520: BF_ROUND(R, L, 15); \
! 521: tmp4 = R; \
! 522: R = L; \
! 523: L = tmp4 ^ data.ctx.P[BF_N + 1];
! 524:
! 525: #if BF_ASM
! 526: #define BF_body() \
! 527: _BF_body_r(&data.ctx);
! 528: #else
! 529: #define BF_body() \
! 530: L = R = 0; \
! 531: ptr = data.ctx.P; \
! 532: do { \
! 533: ptr += 2; \
! 534: BF_ENCRYPT; \
! 535: *(ptr - 2) = L; \
! 536: *(ptr - 1) = R; \
! 537: } while (ptr < &data.ctx.P[BF_N + 2]); \
! 538: \
! 539: ptr = data.ctx.S[0]; \
! 540: do { \
! 541: ptr += 2; \
! 542: BF_ENCRYPT; \
! 543: *(ptr - 2) = L; \
! 544: *(ptr - 1) = R; \
! 545: } while (ptr < &data.ctx.S[3][0xFF]);
! 546: #endif
! 547:
! 548: static void BF_set_key(const char *key, BF_key expanded, BF_key initial,
! 549: unsigned char flags)
! 550: {
! 551: const char *ptr = key;
! 552: unsigned int bug, i, j;
! 553: BF_word safety, sign, diff, tmp[2];
! 554:
! 555: /*
! 556: * There was a sign extension bug in older revisions of this function. While
! 557: * we would have liked to simply fix the bug and move on, we have to provide
! 558: * a backwards compatibility feature (essentially the bug) for some systems and
! 559: * a safety measure for some others. The latter is needed because for certain
! 560: * multiple inputs to the buggy algorithm there exist easily found inputs to
! 561: * the correct algorithm that produce the same hash. Thus, we optionally
! 562: * deviate from the correct algorithm just enough to avoid such collisions.
! 563: * While the bug itself affected the majority of passwords containing
! 564: * characters with the 8th bit set (although only a percentage of those in a
! 565: * collision-producing way), the anti-collision safety measure affects
! 566: * only a subset of passwords containing the '\xff' character (not even all of
! 567: * those passwords, just some of them). This character is not found in valid
! 568: * UTF-8 sequences and is rarely used in popular 8-bit character encodings.
! 569: * Thus, the safety measure is unlikely to cause much annoyance, and is a
! 570: * reasonable tradeoff to use when authenticating against existing hashes that
! 571: * are not reliably known to have been computed with the correct algorithm.
! 572: *
! 573: * We use an approach that tries to minimize side-channel leaks of password
! 574: * information - that is, we mostly use fixed-cost bitwise operations instead
! 575: * of branches or table lookups. (One conditional branch based on password
! 576: * length remains. It is not part of the bug aftermath, though, and is
! 577: * difficult and possibly unreasonable to avoid given the use of C strings by
! 578: * the caller, which results in similar timing leaks anyway.)
! 579: *
! 580: * For actual implementation, we set an array index in the variable "bug"
! 581: * (0 means no bug, 1 means sign extension bug emulation) and a flag in the
! 582: * variable "safety" (bit 16 is set when the safety measure is requested).
! 583: * Valid combinations of settings are:
! 584: *
! 585: * Prefix "$2a$": bug = 0, safety = 0x10000
! 586: * Prefix "$2x$": bug = 1, safety = 0
! 587: * Prefix "$2y$": bug = 0, safety = 0
! 588: */
! 589: bug = (unsigned int)flags & 1;
! 590: safety = ((BF_word)flags & 2) << 15;
! 591:
! 592: sign = diff = 0;
! 593:
! 594: for (i = 0; i < BF_N + 2; i++) {
! 595: tmp[0] = tmp[1] = 0;
! 596: for (j = 0; j < 4; j++) {
! 597: tmp[0] <<= 8;
! 598: tmp[0] |= (unsigned char)*ptr; /* correct */
! 599: tmp[1] <<= 8;
! 600: tmp[1] |= (BF_word_signed)(signed char)*ptr; /* bug */
! 601: /*
! 602: * Sign extension in the first char has no effect - nothing to overwrite yet,
! 603: * and those extra 24 bits will be fully shifted out of the 32-bit word. For
! 604: * chars 2, 3, 4 in each four-char block, we set bit 7 of "sign" if sign
! 605: * extension in tmp[1] occurs. Once this flag is set, it remains set.
! 606: */
! 607: if (j)
! 608: sign |= tmp[1] & 0x80;
! 609: if (!*ptr)
! 610: ptr = key;
! 611: else
! 612: ptr++;
! 613: }
! 614: diff |= tmp[0] ^ tmp[1]; /* Non-zero on any differences */
! 615:
! 616: expanded[i] = tmp[bug];
! 617: initial[i] = BF_init_state.P[i] ^ tmp[bug];
! 618: }
! 619:
! 620: /*
! 621: * At this point, "diff" is zero iff the correct and buggy algorithms produced
! 622: * exactly the same result. If so and if "sign" is non-zero, which indicates
! 623: * that there was a non-benign sign extension, this means that we have a
! 624: * collision between the correctly computed hash for this password and a set of
! 625: * passwords that could be supplied to the buggy algorithm. Our safety measure
! 626: * is meant to protect from such many-buggy to one-correct collisions, by
! 627: * deviating from the correct algorithm in such cases. Let's check for this.
! 628: */
! 629: diff |= diff >> 16; /* still zero iff exact match */
! 630: diff &= 0xffff; /* ditto */
! 631: diff += 0xffff; /* bit 16 set iff "diff" was non-zero (on non-match) */
! 632: sign <<= 9; /* move the non-benign sign extension flag to bit 16 */
! 633: sign &= ~diff & safety; /* action needed? */
! 634:
! 635: /*
! 636: * If we have determined that we need to deviate from the correct algorithm,
! 637: * flip bit 16 in initial expanded key. (The choice of 16 is arbitrary, but
! 638: * let's stick to it now. It came out of the approach we used above, and it's
! 639: * not any worse than any other choice we could make.)
! 640: *
! 641: * It is crucial that we don't do the same to the expanded key used in the main
! 642: * Eksblowfish loop. By doing it to only one of these two, we deviate from a
! 643: * state that could be directly specified by a password to the buggy algorithm
! 644: * (and to the fully correct one as well, but that's a side-effect).
! 645: */
! 646: initial[0] ^= sign;
! 647: }
! 648:
! 649: static char *BF_crypt(const char *key, const char *setting,
! 650: char *output, int size,
! 651: BF_word min)
! 652: {
! 653: #if BF_ASM
! 654: extern void _BF_body_r(BF_ctx *ctx);
! 655: #endif
! 656: static const unsigned char flags_by_subtype[26] =
! 657: {2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
! 658: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 4, 0};
! 659: struct {
! 660: BF_ctx ctx;
! 661: BF_key expanded_key;
! 662: union {
! 663: BF_word salt[4];
! 664: BF_word output[6];
! 665: } binary;
! 666: } data;
! 667: BF_word L, R;
! 668: BF_word tmp1, tmp2, tmp3, tmp4;
! 669: BF_word *ptr;
! 670: BF_word count;
! 671: int i;
! 672:
! 673: if (size < 7 + 22 + 31 + 1) {
! 674: __set_errno(ERANGE);
! 675: return NULL;
! 676: }
! 677:
! 678: if (setting[0] != '$' ||
! 679: setting[1] != '2' ||
! 680: setting[2] < 'a' || setting[2] > 'z' ||
! 681: !flags_by_subtype[(unsigned int)(unsigned char)setting[2] - 'a'] ||
! 682: setting[3] != '$' ||
! 683: setting[4] < '0' || setting[4] > '3' ||
! 684: setting[5] < '0' || setting[5] > '9' ||
! 685: (setting[4] == '3' && setting[5] > '1') ||
! 686: setting[6] != '$') {
! 687: __set_errno(EINVAL);
! 688: return NULL;
! 689: }
! 690:
! 691: count = (BF_word)1 << ((setting[4] - '0') * 10 + (setting[5] - '0'));
! 692: if (count < min || BF_decode(data.binary.salt, &setting[7], 16)) {
! 693: __set_errno(EINVAL);
! 694: return NULL;
! 695: }
! 696: BF_swap(data.binary.salt, 4);
! 697:
! 698: BF_set_key(key, data.expanded_key, data.ctx.P,
! 699: flags_by_subtype[(unsigned int)(unsigned char)setting[2] - 'a']);
! 700:
! 701: memcpy(data.ctx.S, BF_init_state.S, sizeof(data.ctx.S));
! 702:
! 703: L = R = 0;
! 704: for (i = 0; i < BF_N + 2; i += 2) {
! 705: L ^= data.binary.salt[i & 2];
! 706: R ^= data.binary.salt[(i & 2) + 1];
! 707: BF_ENCRYPT;
! 708: data.ctx.P[i] = L;
! 709: data.ctx.P[i + 1] = R;
! 710: }
! 711:
! 712: ptr = data.ctx.S[0];
! 713: do {
! 714: ptr += 4;
! 715: L ^= data.binary.salt[(BF_N + 2) & 3];
! 716: R ^= data.binary.salt[(BF_N + 3) & 3];
! 717: BF_ENCRYPT;
! 718: *(ptr - 4) = L;
! 719: *(ptr - 3) = R;
! 720:
! 721: L ^= data.binary.salt[(BF_N + 4) & 3];
! 722: R ^= data.binary.salt[(BF_N + 5) & 3];
! 723: BF_ENCRYPT;
! 724: *(ptr - 2) = L;
! 725: *(ptr - 1) = R;
! 726: } while (ptr < &data.ctx.S[3][0xFF]);
! 727:
! 728: do {
! 729: int done;
! 730:
! 731: for (i = 0; i < BF_N + 2; i += 2) {
! 732: data.ctx.P[i] ^= data.expanded_key[i];
! 733: data.ctx.P[i + 1] ^= data.expanded_key[i + 1];
! 734: }
! 735:
! 736: done = 0;
! 737: do {
! 738: BF_body();
! 739: if (done)
! 740: break;
! 741: done = 1;
! 742:
! 743: tmp1 = data.binary.salt[0];
! 744: tmp2 = data.binary.salt[1];
! 745: tmp3 = data.binary.salt[2];
! 746: tmp4 = data.binary.salt[3];
! 747: for (i = 0; i < BF_N; i += 4) {
! 748: data.ctx.P[i] ^= tmp1;
! 749: data.ctx.P[i + 1] ^= tmp2;
! 750: data.ctx.P[i + 2] ^= tmp3;
! 751: data.ctx.P[i + 3] ^= tmp4;
! 752: }
! 753: data.ctx.P[16] ^= tmp1;
! 754: data.ctx.P[17] ^= tmp2;
! 755: } while (1);
! 756: } while (--count);
! 757:
! 758: for (i = 0; i < 6; i += 2) {
! 759: L = BF_magic_w[i];
! 760: R = BF_magic_w[i + 1];
! 761:
! 762: count = 64;
! 763: do {
! 764: BF_ENCRYPT;
! 765: } while (--count);
! 766:
! 767: data.binary.output[i] = L;
! 768: data.binary.output[i + 1] = R;
! 769: }
! 770:
! 771: memcpy(output, setting, 7 + 22 - 1);
! 772: output[7 + 22 - 1] = BF_itoa64[(int)
! 773: BF_atoi64[(int)setting[7 + 22 - 1] - 0x20] & 0x30];
! 774:
! 775: /* This has to be bug-compatible with the original implementation, so
! 776: * only encode 23 of the 24 bytes. :-) */
! 777: BF_swap(data.binary.output, 6);
! 778: BF_encode(&output[7 + 22], data.binary.output, 23);
! 779: output[7 + 22 + 31] = '\0';
! 780:
! 781: return output;
! 782: }
! 783:
! 784: static int _crypt_output_magic(const char *setting, char *output, int size)
! 785: {
! 786: if (size < 3)
! 787: return -1;
! 788:
! 789: output[0] = '*';
! 790: output[1] = '0';
! 791: output[2] = '\0';
! 792:
! 793: if (setting[0] == '*' && setting[1] == '0')
! 794: output[1] = '1';
! 795:
! 796: return 0;
! 797: }
! 798:
! 799: /*
! 800: * Please preserve the runtime self-test. It serves two purposes at once:
! 801: *
! 802: * 1. We really can't afford the risk of producing incompatible hashes e.g.
! 803: * when there's something like gcc bug 26587 again, whereas an application or
! 804: * library integrating this code might not also integrate our external tests or
! 805: * it might not run them after every build. Even if it does, the miscompile
! 806: * might only occur on the production build, but not on a testing build (such
! 807: * as because of different optimization settings). It is painful to recover
! 808: * from incorrectly-computed hashes - merely fixing whatever broke is not
! 809: * enough. Thus, a proactive measure like this self-test is needed.
! 810: *
! 811: * 2. We don't want to leave sensitive data from our actual password hash
! 812: * computation on the stack or in registers. Previous revisions of the code
! 813: * would do explicit cleanups, but simply running the self-test after hash
! 814: * computation is more reliable.
! 815: *
! 816: * The performance cost of this quick self-test is around 0.6% at the "$2a$08"
! 817: * setting.
! 818: */
! 819: char *php_crypt_blowfish_rn(const char *key, const char *setting,
! 820: char *output, int size)
! 821: {
! 822: const char *test_key = "8b \xd0\xc1\xd2\xcf\xcc\xd8";
! 823: const char *test_setting = "$2a$00$abcdefghijklmnopqrstuu";
! 824: static const char * const test_hash[2] =
! 825: {"VUrPmXD6q/nVSSp7pNDhCR9071IfIRe\0\x55", /* $2x$ */
! 826: "i1D709vfamulimlGcq0qq3UvuUasvEa\0\x55"}; /* $2a$, $2y$ */
! 827: char *retval;
! 828: const char *p;
! 829: int save_errno, ok;
! 830: struct {
! 831: char s[7 + 22 + 1];
! 832: char o[7 + 22 + 31 + 1 + 1 + 1];
! 833: } buf;
! 834:
! 835: /* Hash the supplied password */
! 836: _crypt_output_magic(setting, output, size);
! 837: retval = BF_crypt(key, setting, output, size, 16);
! 838: save_errno = errno;
! 839:
! 840: /*
! 841: * Do a quick self-test. It is important that we make both calls to BF_crypt()
! 842: * from the same scope such that they likely use the same stack locations,
! 843: * which makes the second call overwrite the first call's sensitive data on the
! 844: * stack and makes it more likely that any alignment related issues would be
! 845: * detected by the self-test.
! 846: */
! 847: memcpy(buf.s, test_setting, sizeof(buf.s));
! 848: if (retval)
! 849: buf.s[2] = setting[2];
! 850: memset(buf.o, 0x55, sizeof(buf.o));
! 851: buf.o[sizeof(buf.o) - 1] = 0;
! 852: p = BF_crypt(test_key, buf.s, buf.o, sizeof(buf.o) - (1 + 1), 1);
! 853:
! 854: ok = (p == buf.o &&
! 855: !memcmp(p, buf.s, 7 + 22) &&
! 856: !memcmp(p + (7 + 22),
! 857: test_hash[(unsigned int)(unsigned char)buf.s[2] & 1],
! 858: 31 + 1 + 1 + 1));
! 859:
! 860: {
! 861: const char *k = "\xff\xa3" "34" "\xff\xff\xff\xa3" "345";
! 862: BF_key ae, ai, ye, yi;
! 863: BF_set_key(k, ae, ai, 2); /* $2a$ */
! 864: BF_set_key(k, ye, yi, 4); /* $2y$ */
! 865: ai[0] ^= 0x10000; /* undo the safety (for comparison) */
! 866: ok = ok && ai[0] == 0xdb9c59bc && ye[17] == 0x33343500 &&
! 867: !memcmp(ae, ye, sizeof(ae)) &&
! 868: !memcmp(ai, yi, sizeof(ai));
! 869: }
! 870:
! 871: __set_errno(save_errno);
! 872: if (ok)
! 873: return retval;
! 874:
! 875: /* Should not happen */
! 876: _crypt_output_magic(setting, output, size);
! 877: __set_errno(EINVAL); /* pretend we don't support this hash type */
! 878: return NULL;
! 879: }
! 880:
! 881: #if 0
! 882: char *_crypt_gensalt_blowfish_rn(const char *prefix, unsigned long count,
! 883: const char *input, int size, char *output, int output_size)
! 884: {
! 885: if (size < 16 || output_size < 7 + 22 + 1 ||
! 886: (count && (count < 4 || count > 31)) ||
! 887: prefix[0] != '$' || prefix[1] != '2' ||
! 888: (prefix[2] != 'a' && prefix[2] != 'y')) {
! 889: if (output_size > 0) output[0] = '\0';
! 890: __set_errno((output_size < 7 + 22 + 1) ? ERANGE : EINVAL);
! 891: return NULL;
! 892: }
! 893:
! 894: if (!count) count = 5;
! 895:
! 896: output[0] = '$';
! 897: output[1] = '2';
! 898: output[2] = prefix[2];
! 899: output[3] = '$';
! 900: output[4] = '0' + count / 10;
! 901: output[5] = '0' + count % 10;
! 902: output[6] = '$';
! 903:
! 904: BF_encode(&output[7], (const BF_word *)input, 16);
! 905: output[7 + 22] = '\0';
! 906:
! 907: return output;
! 908: }
! 909: #endif
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