bcrypt.php

<?php
// Copyright (c) 2011 Antoni Sobkowicz for PHP version
// Copyright (c) 2006 Damien Miller <djm@mindrot.org>
// Copyright (c) 2007 Derek Slager
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

///This algorithm can be rather slow on shared hosting, since it reguires considerable
///amount of calculation power. However, for 6 round salt it should not time out.

///Code is not complete yet, but using crypt_raw and encode_base64 you can already use it.
class bcrypt
{

    private $GENSALT_DEFAULT_LOG2_ROUNDS = 10;
    private $BCRYPT_SALT_LEN = 16;

    // Blowfish parameters.
    private $BLOWFISH_NUM_ROUNDS = 16;

    // Initial contents of key schedule.
    private $p_orig = array(
        0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
        0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
        0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
        0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
        0x9216d5d9, 0x8979fb1b
    );

    private $s_orig = array(
        0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
        0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
        0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
        0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
        0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
        0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
        0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
        0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
        0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
        0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
        0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
        0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
        0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
        0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
        0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
        0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
        0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
        0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
        0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
        0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
        0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
        0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
        0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
        0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
        0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
        0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
        0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
        0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
        0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
        0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
        0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
        0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
        0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
        0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
        0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
        0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
        0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
        0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
        0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
        0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
        0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
        0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
        0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
        0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
        0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
        0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
        0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
        0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
        0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
        0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
        0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
        0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
        0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
        0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
        0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
        0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
        0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
        0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
        0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
        0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
        0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
        0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
        0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
        0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a,
        0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
        0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
        0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
        0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
        0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
        0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
        0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
        0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
        0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
        0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
        0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
        0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
        0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
        0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
        0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
        0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
        0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
        0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
        0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
        0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
        0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
        0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
        0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
        0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
        0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
        0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
        0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
        0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
        0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
        0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
        0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
        0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
        0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
        0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
        0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
        0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
        0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
        0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
        0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
        0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
        0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
        0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
        0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
        0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
        0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
        0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
        0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
        0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
        0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
        0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
        0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
        0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
        0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
        0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
        0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
        0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
        0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
        0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
        0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
        0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
        0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
        0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
        0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
        0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7,
        0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
        0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
        0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
        0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
        0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
        0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
        0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
        0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
        0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
        0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
        0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
        0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
        0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
        0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
        0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
        0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
        0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
        0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
        0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
        0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
        0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
        0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
        0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
        0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
        0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
        0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
        0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
        0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
        0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
        0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
        0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
        0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
        0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
        0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
        0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
        0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
        0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
        0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
        0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
        0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
        0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
        0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
        0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
        0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
        0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
        0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
        0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
        0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
        0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
        0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
        0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
        0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
        0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
        0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
        0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
        0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
        0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
        0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
        0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
        0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
        0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
        0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
        0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
        0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0,
        0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
        0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
        0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
        0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
        0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
        0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
        0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
        0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
        0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
        0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
        0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
        0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
        0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
        0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
        0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
        0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
        0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
        0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
        0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
        0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
        0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
        0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
        0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
        0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
        0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
        0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
        0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
        0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
        0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
        0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
        0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
        0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
        0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
        0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
        0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
        0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
        0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
        0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
        0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
        0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
        0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
        0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
        0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
        0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
        0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
        0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
        0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
        0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
        0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
        0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
        0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
        0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
        0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
        0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
        0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
        0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
        0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
        0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
        0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
        0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
        0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
        0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
        0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
        0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6
    );

    // bcrypt IV: "OrpheanBeholderScryDoubt".
    private $bf_crypt_ciphertext = array(
        0x4f727068, 0x65616e42, 0x65686f6c,
        0x64657253, 0x63727944, 0x6f756274
    );

    // Table for Base64 encoding.
    private $base64_code = array(
        '.', '/', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
        'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
        'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',
        'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
        'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5',
        '6', '7', '8', '9'
    );

    // Table for Base64 decoding.
    private $index_64 = array(
        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
        -1, -1, -1, -1, -1, -1, 0, 1, 54, 55,
        56, 57, 58, 59, 60, 61, 62, 63, -1, -1,
        -1, -1, -1, -1, -1, 2, 3, 4, 5, 6,
        7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
        17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
        -1, -1, -1, -1, -1, -1, 28, 29, 30,
        31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
        41, 42, 43, 44, 45, 46, 47, 48, 49, 50,
        51, 52, 53, -1, -1, -1, -1, -1
    );

    // Expanded Blowfish key.
    private $p;
    private $s;

    /// <summary>Encode a byte array using bcrypt's slightly-modified
    /// Base64 encoding scheme. Note that this is _not_ compatible
    /// with the standard MIME-Base64 encoding.</summary>
    /// <param name="d">The byte array to encode</param>
    /// <param name="length">The number of bytes to encode</param>
    /// <returns>A Base64-encoded string</returns>
    function encode_base64($d, $length)
    {

        if ($length <= 0 || $length > count($d))
        {
            die("Wrong length.");
        }

        $rs = "";
        for ($offset = 0, $c1, $c2; $offset < $length; )
        {
            $c1 = $d[$offset++] & 0xff;
            $rs = $rs.($this->base64_code[($c1 >> 2) & 0x3f]);
            $c1 = ($c1 & 0x03) << 4;
            if ($offset >= $length)
            {
                $rs=$rs.($this->base64_code[$c1 & 0x3f]);
                break;
            }
            $c2 = $d[$offset++] & 0xff;
            $c1 |= ($c2 >> 4) & 0x0f;
            $rs=$rs.($this->base64_code[$c1 & 0x3f]);
            $c1 = ($c2 & 0x0f) << 2;
            if ($offset >= $length)
            {
                $rs=$rs.($this->base64_code[$c1 & 0x3f]);
                break;
            }
            $c2 = $d[$offset++] & 0xff;
            $c1 |= ($c2 >> 6) & 0x03;
            $rs=$rs.($this->base64_code[$c1 & 0x3f]);
            $rs=$rs.($this->base64_code[$c2 & 0x3f]);
        }

        return $rs;
    }

    /// <summary>Look up the 3 bits base64-encoded by the specified
    /// character, range-checking against the conversion
    /// table.</summary>
    /// <param name="c">The Base64-encoded value</param>
    /// <returns>The decoded value of <c>x</c></returns>
    function char_64($c)
    {
        $i = $c;
        return ($i < 0 || $i > count($this->index_64)) ? -1 : $this->index_64[$i];
    }

    /// <summary>Decode a string encoded using BCrypt's Base64 scheme to a
    /// byte array. Note that this is _not_ compatible with the standard
    /// MIME-Base64 encoding.</summary>
    /// <param name="s">The string to decode</param>
    /// <param name="maximumLength">The maximum number of bytes to decode</param>
    /// <returns>An array containing the decoded bytes</returns>
    function decode_base64($s, $maximumLength)
    {

        $bytes;

        if ($maximumLength <= 0)
        {
            die("Maximum length < 0");
        }
$slen = strlen($s);

        for ($offset = 0, $length = 0; $offset < $slen - 1 && $length < $maximumLength; )
        {
            $c1 = $this->char_64(ord($s[$offset++]));
            $c2 = $this->char_64(ord($s[$offset++]));
            if ($c1 == -1 || $c2 == -1)
            {
               // echo "a";
                break;
            }
            $bytes[] = (($c1 << 2) | (($c2 & 0x30) >> 4));
            if (++$length >= $maximumLength || $offset >= strlen($s))
            {
               // echo "b::".$length."::".$offset."::";
                break;
            }

            $c3 = $this->char_64(ord($s[$offset++]));
            if ($c3 == -1)
            {
               // echo "c";
                break;
            }

            $bytes[] = ((($c2 & 0x0f) << 4) | (($c3 & 0x3c) >> 2));
            if (++$length >= $maximumLength || $offset >= strlen($s))
            {
              //  echo "d";
                break;
            }

            $c4 = $this->char_64(ord($s[$offset++]));
            $bytes[] = ((($c3 & 0x03) << 6) | $c4);

            ++$length;
        }

        return $bytes;
    }

    /// <summary>
    /// Blowfish encipher a single 64-bit block encoded as two 32-bit
    /// halves.
    /// </summary>
    /// <param name="block">An array containing the two 32-bit half
    /// blocks.</param>
    /// <param name="offset">The position in the array of the
    /// blocks.</param>
    function encipher(&$block, $offset)
    {

        $i; $n; $l= $block[$offset]; $r = $block[$offset + 1];

        $l ^= $this->overflow_int($this->p[0]);
        for ($i = 0; $i <= $this->BLOWFISH_NUM_ROUNDS - 2; )
        {
            // Feistel substitution on left word
            $n = $this->overflow_int($this->s[($l >> 24) & 0xff]);
            $n += $this->overflow_int($this->s[0x100 | (($l >> 16) & 0xff)]);
            $n ^= $this->overflow_int($this->s[0x200 | (($l >> 8) & 0xff)]);
            $n += $this->overflow_int($this->s[0x300 | ($l & 0xff)]);
            $r ^= $this->overflow_int($n ^ $this->p[++$i]);

            // Feistel substitution on right word
            $n = $this->overflow_int($this->s[($r >> 24) & 0xff]);
            $n += $this->overflow_int($this->s[0x100 | (($r >> 16) & 0xff)]);
            $n ^= $this->overflow_int($this->s[0x200 | (($r >> 8) & 0xff)]);
            $n += $this->overflow_int($this->s[0x300 | ($r & 0xff)]);
            $l ^= $this->overflow_int($n ^ $this->p[++$i]);
        }
        $block[$offset] = $this->overflow_int($r ^ $this->p[$this->BLOWFISH_NUM_ROUNDS + 1]);
        $block[$offset + 1] = $this->overflow_int($l);
    }

    /// <summary>
    /// Cycically extract a word of key material.
    /// </summary>
    /// <param name="data">The string to extract the data
    /// from.</param>
    /// <param name="offset">The current offset into data.</param>
    /// <returns>The next work of material from data.</returns>
    function stream2word($data, &$offset)
    {

        $word = 0;

        for ($i = 0; $i < 4; $i++)
        {
            $word = ($word << 8) | $data[$offset];
            $offset = ($offset + 1) % count($data);
        }

        return $word;
    }

    /// <summary>
    /// Initialize the Blowfish key schedule.
    /// </summary>
    function init_key()
    {
        $this->p = $this->p_orig;
        $this->s = $this->s_orig;
    }

    /// <summary>
    /// Key the Blowfish cipher.
    /// </summary>
    /// <param name="key">An array containing the key.</param>
    function key($key)
    {

        $lr = array(0,0);
        $plen = count($this->p); $slen = count($this->s);

        $offset = 0;
        for ($i = 0; $i < $plen; $i++)
        {
            $this->p[$i] = $this->overflow_int($this->p[$i] ^ $this->stream2word($key, $offset));
        }

        for ($i = 0; $i < $plen; $i += 2)
        {
            $this->encipher($lr, 0);
            $this->p[$i] = $lr[0];
            $this->p[$i + 1] = $lr[1];
        }

        for ($i = 0; $i < $slen; $i += 2)
        {
            $this->encipher($lr, 0);
            $this->s[$i] = $lr[0];
            $this->s[$i + 1] = $lr[1];
        }
    }

    /// <summary>
    /// Perform the "enhanced key schedule" step described by Provos
    /// and Mazieres in "A Future-Adaptable Password Scheme"
    /// (http://www.openbsd.org/papers/bcrypt-paper.ps).
    /// </summary>
    /// <param name="data">Salt information.</param>
    /// <param name="key">Password information.</param>
    function eks_key($data, $key)
    {
        $lr = array( 0, 0 );
        $plen = count($this->p); $slen = count($this->s);

        $offset = 0;
        for ($i = 0; $i < $plen; $i++)
        {
            $this->p[$i] = $this->overflow_int($this->p[$i] ^ $this->stream2word($key, $offset));
        }


        $dataOffset = 0;
        for ($i = 0; $i < $plen; $i += 2)
        {

            $lr[0] ^= $this->overflow_int($this->stream2word($data, $dataOffset));
            $lr[1] ^= $this->overflow_int($this->stream2word($data, $dataOffset));
            $this->encipher($lr, 0);
            $this->p[$i] = $lr[0];
            $this->p[$i + 1] = $lr[1];
        }

        for ($i = 0; $i < $slen; $i += 2)
        {
            $lr[0] ^=  $this->overflow_int($this->stream2word($data, $dataOffset));
            $lr[1] ^=  $this->overflow_int($this->stream2word($data, $dataOffset));
            $this->encipher($lr, 0);
            $this->s[$i] = $lr[0];
            $this->s[$i + 1] = $lr[1];
        }
    }

    /// <summary>
    /// Changes int from 32-bit signed presentation to float represenation
    /// (since PHP does not support uint);
    /// </summary>
    /// <param name="i">Int to change</param>
    /// <returns>Float with uint representation of int</returns>
    function overflow_int($i)
    {
        if ($i< 0)
                        $i = 4294967296  + $i;
        return $i;
    }

    /// <summary>
    /// Does overflow_int for all integers in
    /// two main cipher arrays
    /// </summary>
    function overflow_arrays()
    {
         $plen = count($this->p); $slen = count($this->s);
            for ($i = 0; $i < $plen; $i++)
            {
                if ($this->p[$i] < 0)
                        $this->p[$i] = 4294967296  + $this->p[$i];
            }

            for ($i = 0; $i < $slen; $i++)
            {
                if ($this->s[$i] < 0)
                        $this->s[$i] = 4294967296  + $this->s[$i];
            }

    }

    /// <summary>
    /// Perform the central password hashing step in the bcrypt
    /// scheme.
    /// </summary>
    /// <param name="password">The password to hash.</param>
    /// <param name="salt">The binary salt to hash with the
    /// password.</param>
    /// <param name="logRounds">The binary logarithm of the number of
    /// rounds of hashing to apply.</param>
    /// <returns>An array containing the binary hashed password.</returns>
    function crypt_raw($password, $salt, $logRounds)
    {

        $cdata = $this->bf_crypt_ciphertext;

        $clen = count($cdata);
       // print_r($this->bf_crypt_ciphertext);
       // print_r($cdata);
        if ($logRounds < 4 || $logRounds > 31)
        {
            die("Invalid number of rounds");
        }
        $rounds = 1 << $logRounds;
     //   echo ($rounds."\n");
        if (count($salt) != $this->BCRYPT_SALT_LEN)
        {
            die("Invalid length of salt");
        }
       // echo "a";
        $this->init_key();

      //  echo "b";
        $this->eks_key($salt, $password);



        $this->overflow_arrays();


        //echo "After first key generation\n\n";
        //print_r($this->p);
        for ($i = 0; $i < $rounds; $i++)
        {
            //echo "Round ".$i.":\n\n";
            $this->key($password);
            $this->overflow_arrays();
         //  print_r($this->p);

            $this->key($salt);
            $this->overflow_arrays();
          //  print_r($this->p);
        }
$this->overflow_arrays();

      //   print_r($this->p);
        //print_r($this->p);
      //  echo "d";
        for ($i = 0; $i < 64;$i++)
        {
            for ($j = 0; $j < ($clen >> 1); $j++)
            {
                $this->encipher($cdata, $j << 1);
            }
        }

      //  echo "e";
        $ret;
        for ($i = 0, $j = 0; $i < $clen; $i++)
        {
            $ret[$j++] = (($cdata[$i] >> 24) & 0xff);
            $ret[$j++] = (($cdata[$i] >> 16) & 0xff);
            $ret[$j++] = (($cdata[$i] >> 8) & 0xff);
            $ret[$j++] = ($cdata[$i] & 0xff);
        }

     //   print_r($this->p);
    //    echo "f";
        return $ret;
    }
    ///////////

    /// <summary>
    /// Hash a password using the OpenBSD bcrypt scheme.
    /// </summary>
    /// <param name="password">The password to hash.</param>
    /// <param name="salt">The salt to hash with (perhaps generated
    /// using <c>BCrypt.GenerateSalt</c>).</param>
    /// <returns>The hashed password.</returns>
    function hashpw($password, $salt)
    {
        if ($password == null)
        {
            die ("Password not set");
        }
        if ($salt == null)
        {
            die ("Salt not set");
        }

        $minor = 0;

        if ($salt[0] != '$' || $salt[1] != '2')
        {
            die("Invalid salt version");
        }

        $offset;
        if ($salt[1] != '$')
        {
            $minor = $salt[2];
            if ($minor != 'a' || $salt[3] != '$')
            {
            die("Invalid salt revision");
            }
            $offset = 4;
        }
        else
        {
            $offset = 3;
        }
        // Extract number of rounds
        if ($salt[$offset + 2] != '$')
        {
            die("Missing salt rounds.");
        }

        $rounds = (int)substr($salt,$offset, 2);
        $passwordBytes = array();
       $password = $password.($minor >= 'a' ? "\0" : "");
        foreach (str_split($password) as $chr) {
            $passwordBytes[] = ord($chr);
        }
         $saltBytes = $this->decode_base64(substr($salt,$offset+3,22),$this->BCRYPT_SALT_LEN);
        $hashed = $this->crypt_raw($passwordBytes, $saltBytes, $rounds);

        $rs;

         $rs = $rs."$2";
        if ($minor >= 'a')
        {
            $rs = $rs.$minor;
        }
         $rs = $rs."$";
        if ($rounds < 10)
        {
         $rs = $rs."0";
        }
         $rs = $rs.$rounds;
         $rs = $rs."$";
         $rs = $rs.$this->encode_base64($saltBytes, count($saltBytes));
         $rs = $rs.$this->encode_base64($hashed,((count($this->bf_crypt_ciphertext) * 4) - 1));

        return $rs;
    }

    /// <summary>
    /// Generate a salt for use with the BCrypt.HashPassword() method.
    /// </summary>
    /// <param name="logRounds">The log2 of the number of rounds of
    /// hashing to apply. The work factor therefore increases as (2 **
    /// logRounds).</param>
    /// <returns>An encoded salt value.</returns>
    /*function generate_salt($logRounds)
    {

        byte[] randomBytes = new byte[BCRYPT_SALT_LEN];

        RandomNumberGenerator.Create().GetBytes(randomBytes);

        StringBuilder rs = new StringBuilder((randomBytes.Length * 2) + 8);

        rs.Append("$2a$");
        if (logRounds < 10)
        {
            rs.Append('0');
        }
        rs.Append(logRounds);
        rs.Append('$');
        rs.Append(EncodeBase64(randomBytes, randomBytes.Length));

        return rs.ToString();
    }

    /// <summary>
    /// Generate a salt for use with the <c>BCrypt.HashPassword()</c>
    /// method, selecting a reasonable default for the number of hashing
    /// rounds to apply.
    /// </summary>
    /// <returns>An encoded salt value.</returns>
    function generate_salt()
    {
        return generate_salt($GENSALT_DEFAULT_LOG2_ROUNDS);
    }

    /// <summary>
    /// Check that a plaintext password matches a previously hashed
    /// one.
    /// </summary>
    /// <param name="plaintext">The plaintext password to verify.</param>
    /// <param name="hashed">The previously hashed password.</param>
    /// <returns><c>true</c> if the passwords, <c>false</c>
    /// otherwise.</returns>
 //   public static bool CheckPassword(string plaintext, string hashed)
 //   {
 //       return StringComparer.Ordinal.Compare(hashed, HashPassword(plaintext, hashed)) == 0;
 //   }*/

}
?>