var crypto = require("crypto");

var BCRYPT_SALT_LEN = 16;

var GENSALT_DEFAULT_LOG2_ROUNDS = 10;
var BLOWFISH_NUM_ROUNDS = 16;

var MAX_EXECUTION_TIME = 100;
var P_orig = [0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, 0xa4093822,
		0x299f31d0, 0x082efa98, 0xec4e6c89, 0x452821e6, 0x38d01377,
		0xbe5466cf, 0x34e90c6c, 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5,
		0xb5470917, 0x9216d5d9, 0x8979fb1b];
var S_orig = [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];
var bf_crypt_ciphertext = [0x4f727068, 0x65616e42, 0x65686f6c, 0x64657253,
		0x63727944, 0x6f756274];
var base64_code = ['.', '/', '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'];
var index_64 = [-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];

function getByte(c) {
	var ret = 0;
	try {
		var b = c.charCodeAt(0);
	} catch (err) {
		b = c;
	}
	if (b > 127) {
		return -128 + (b % 128);
	} else {
		return b;
	}
};

function encode_base64(d, len) {
	var off = 0;
	var rs = [];
	var c1;
	var c2;
	if (len <= 0 || len > d.length)
		throw "Invalid len";
	while (off < len) {
		c1 = d[off++] & 0xff;
		rs.push(base64_code[(c1 >> 2) & 0x3f]);
		c1 = (c1 & 0x03) << 4;
		if (off >= len) {
			rs.push(base64_code[c1 & 0x3f]);
			break;
		}
		c2 = d[off++] & 0xff;
		c1 |= (c2 >> 4) & 0x0f;
		rs.push(base64_code[c1 & 0x3f]);
		c1 = (c2 & 0x0f) << 2;
		if (off >= len) {
			rs.push(base64_code[c1 & 0x3f]);
			break;
		}
		c2 = d[off++] & 0xff;
		c1 |= (c2 >> 6) & 0x03;
		rs.push(base64_code[c1 & 0x3f]);
		rs.push(base64_code[c2 & 0x3f]);
	}
	return rs.join('');
};

function char64(x) {
	var code = x.charCodeAt(0);
	if (code < 0 || code > index_64.length) {
		return -1;
	}
	return index_64[code];
};

function decode_base64(s, maxolen) {
	var off = 0;
	var slen = s.length;
	var olen = 0;
	var rs = [];
	var c1, c2, c3, c4, o;
	if (maxolen <= 0) throw "Invalid maxolen";
	while (off < slen - 1 && olen < maxolen) {
		c1 = char64(s.charAt(off++));
		c2 = char64(s.charAt(off++));
		if (c1 == -1 || c2 == -1) {
			break;
		}
		o = getByte(c1 << 2);
		o |= (c2 & 0x30) >> 4;
		rs.push(String.fromCharCode(o));
		if (++olen >= maxolen || off >= slen) {
			break;
		}
		c3 = char64(s.charAt(off++));
		if (c3 == -1) {
			break;
		}
		o = getByte((c2 & 0x0f) << 4);
		o |= (c3 & 0x3c) >> 2;
		rs.push(String.fromCharCode(o));
		if (++olen >= maxolen || off >= slen) {
			break;
		}
		c4 = char64(s.charAt(off++));
		o = getByte((c3 & 0x03) << 6);
		o |= c4;
		rs.push(String.fromCharCode(o));
		++olen;
	}
	var ret = [];
	for (off = 0; off < olen; off++) {
		ret.push(getByte(rs[off]));
	}
	return ret;
};

function encipher(lr, off, P, S) {
	var i;
	var n;
	var l = lr[off];
	var r = lr[off + 1];

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

		// Feistel substitution on right word
		n = S[(r >> 24) & 0xff];
		n += S[0x100 | ((r >> 16) & 0xff)];
		n ^= S[0x200 | ((r >> 8) & 0xff)];
		n += S[0x300 | (r & 0xff)];
		l ^= n ^ P[++i];
	}
	lr[off] = r ^ P[BLOWFISH_NUM_ROUNDS + 1];
	lr[off + 1] = l;
	return lr;
};

function streamtoword(data, offp) {
	var i;
	var word = 0;
	for (i = 0; i < 4; i++) {
		word = (word << 8) | (data[offp] & 0xff);
		offp = (offp + 1) % data.length;
	}
	return {key:word, offp:offp};
};

function key(key, P, S) {
	var i;
	var offp = 0;
	var lr = new Array(0x00000000, 0x00000000);
	var plen = P.length;
	var slen = S.length;

	for (i = 0; i < plen; i++) {
		var sw = streamtoword(key, offp);
		offp = sw.offp;
		P[i] = P[i] ^ sw.key;
	}
	for (i = 0; i < plen; i += 2) {
		lr = encipher(lr, 0, P, S);
		P[i] = lr[0];
		P[i + 1] = lr[1];
	}

	for (i = 0; i < slen; i += 2) {
		lr = encipher(lr, 0, P, S);
		S[i] = lr[0];
		S[i + 1] = lr[1];
	}
};

function ekskey(data, key, P, S) {
	var i;
	var offp = 0;
	var lr = new Array(0x00000000, 0x00000000);
	var plen = P.length;
	var slen = S.length;
	var sw;

	for (i = 0; i < plen; i++) {
		sw = streamtoword(key, offp);
		offp = sw.offp;
		P[i] = P[i] ^ sw.key;
	}
	offp = 0;
	for (i = 0; i < plen; i += 2) {
		sw = streamtoword(data, offp);
		offp = sw.offp;
		lr[0] ^= sw.key;

		sw = streamtoword(data, offp);
		offp = sw.offp;
		lr[1] ^= sw.key;

		lr = encipher(lr, 0, P, S);
		P[i] = lr[0];
		P[i + 1] = lr[1];
	}
	for (i = 0; i < slen; i += 2) {
		sw = streamtoword(data, offp);
		offp = sw.offp;
		lr[0] ^= sw.key;

		sw = streamtoword(data, offp);
		offp = sw.offp;
		lr[1] ^= sw.key;

		lr = encipher(lr, 0, P, S);
		S[i] = lr[0];
		S[i + 1] = lr[1];
	}
};

function crypt_raw(password, salt, log_rounds, progress) {
	var rounds;
	var j;
	var cdata = bf_crypt_ciphertext.slice();
	var clen = cdata.length;
	var one_percent;

	if (log_rounds < 4 || log_rounds > 31)
		throw "Bad number of rounds";
	if (salt.length != BCRYPT_SALT_LEN)
		throw "Bad salt length";

	rounds = 1 << log_rounds;
	one_percent = Math.floor(rounds / 100) + 1;

	var P = P_orig.slice();
	var S = S_orig.slice();

	ekskey(salt, password, P, S);

	var i = 0;

	while(true) {
		if(i < rounds){
			var start = new Date();
			for (; i < rounds;) {
				i = i + 1;
				key(password, P, S);
				key(salt, P, S);
		                if(i % one_percent == 0){
			        	progress();
                		}
		                if((new Date() - start) > MAX_EXECUTION_TIME){
                    			break;
		                }
            		}
        	} else {
 	        	for (i = 0; i < 64; i++) {
                		for (j = 0; j < (clen >> 1); j++) {
                    			lr = encipher(cdata, j << 1, P, S);
                		}
            		}
			var ret = [];
		        for (i = 0; i < clen; i++) {
                		ret.push(getByte((cdata[i] >> 24) & 0xff));
                		ret.push(getByte((cdata[i] >> 16) & 0xff));
                		ret.push(getByte((cdata[i] >> 8) & 0xff));
                		ret.push(getByte(cdata[i] & 0xff));
            		}
            		return(ret);
        	}
	}
};

function hashpw(password, salt, progress) {
	var real_salt;
	var passwordb = [];
	var saltb = [];
	var hashed = [];
	var minor = String.fromCharCode(0);
	var rounds = 0;
	var off = 0;

	if (!progress){
	        var progress = function() {};
	}

	if (salt.charAt(0) != '$' || salt.charAt(1) != '2')
		throw "Invalid salt version";
	if (salt.charAt(2) == '$')
		off = 3;
	else {
		minor = salt.charAt(2);
		if (minor != 'a' || salt.charAt(3) != '$')
			throw "Invalid salt revision";
		off = 4;
	}

	// Extract number of rounds
	if (salt.charAt(off + 2) > '$')
		throw "Missing salt rounds";
	var r1 = parseInt(salt.substring(off, off + 1)) * 10;
	var r2 = parseInt(salt.substring(off + 1, off + 2));
	rounds = r1 + r2;
	real_salt = salt.substring(off + 3, off + 25);
	password = password + (minor >= 'a' ? "\000" : "");

	var buf = new Buffer(password);
	for (var r = 0; r < buf.length; r++) {
		passwordb.push(buf[r]);
	}
	saltb = decode_base64(real_salt, BCRYPT_SALT_LEN);
	var hashed = crypt_raw(passwordb, saltb, rounds, progress);

	var rs = [];
	rs.push("$2");
	if (minor >= 'a')
		rs.push(minor);
	rs.push("$");
	if (rounds < 10)
		rs.push("0");
	rs.push(rounds.toString());
	rs.push("$");
	rs.push(encode_base64(saltb, saltb.length));
	rs.push(encode_base64(hashed, bf_crypt_ciphertext.length * 4 - 1));

	return(rs.join(''));
};

function gensalt(rounds) {
	var iteration_count = rounds;
	if (iteration_count < 4 || iteration_count > 31) {
		iteration_count = GENSALT_DEFAULT_LOG2_ROUNDS;
	}
	var output = [];
	output.push("$2a$");
	if (iteration_count < 10)
		output.push("0");
	output.push(iteration_count.toString());
	output.push('$');

	var rand_buf;
	try {
		rand_buf = crypto.randomBytes(BCRYPT_SALT_LEN);
	} catch (ex) {
		throw ex;
	}

	output.push(encode_base64(rand_buf, BCRYPT_SALT_LEN));
	return output.join('');
};

function genSaltSync(rounds) {
	/*
		rounds - [OPTIONAL] - the number of rounds to process the data for. (default - 10)
		seed_length - [OPTIONAL] - RAND_bytes wants a length. to make that a bit flexible, you can specify a seed_length. (default - 20)
	*/
	if(!rounds) {
		rounds = GENSALT_DEFAULT_LOG2_ROUNDS;
	}
	return gensalt(rounds);
}

function genSalt(rounds, callback) {
	/*
		rounds - [OPTIONAL] - the number of rounds to process the data for. (default - 10)
		seed_length - [OPTIONAL] - RAND_bytes wants a length. to make that a bit flexible, you can specify a seed_length. (default - 20)
		callback - [REQUIRED] - a callback to be fired once the salt has been generated. uses eio making it asynchronous.
			error - First parameter to the callback detailing any errors.
			salt - Second parameter to the callback providing the generated salt.
	*/
	if(!callback) {
		throw "No callback function was given."
	}
	process.nextTick(function() {
		var result = null;
		var error = null;
		try {
			result = genSaltSync(rounds)
		} catch(err) {
			error = err;
		}
		callback(error, result);
	});
}

function hashSync(data, salt, progress) {
	/*
		data - [REQUIRED] - the data to be encrypted.
		salt - [REQUIRED] - the salt to be used in encryption.
	*/
	if(!salt) {
		salt = genSaltSync();
	}
	return hashpw(data, salt, progress);
}

function hash(data, salt, progress, callback) {
	/*
		data - [REQUIRED] - the data to be encrypted.
		salt - [REQUIRED] - the salt to be used to hash the password. if specified as a number then a salt will be generated and used (see examples).
		progress - a callback to be called during the hash calculation to signify progress
		callback - [REQUIRED] - a callback to be fired once the data has been encrypted. uses eio making it asynchronous.
			error - First parameter to the callback detailing any errors.
			encrypted - Second parameter to the callback providing the encrypted form.
	*/
	if(!callback) {
		throw "No callback function was given."
	}
	process.nextTick(function() {
		var result = null;
		var error = null;
		try {
			result = hashSync(data, salt, progress)
		} catch(err) {
			error = err;
		}
		callback(error, result);
	});
}

function compareSync(data, encrypted) {
	/*
		data - [REQUIRED] - data to compare.
		encrypted - [REQUIRED] - data to be compared to.
	*/

	if(typeof data != "string" ||  typeof encrypted != "string") {
		throw "Incorrect arguments";
	}

	var encrypted_length = encrypted.length;

	if(encrypted_length != 60) {
		throw "Not a valid BCrypt hash.";
	}

	var same = true;
	var hash_data = hashSync(data, encrypted.substr(0, encrypted_length-31));
	var hash_data_length = hash_data.length;

	same = hash_data_length == encrypted_length;

	var max_length = (hash_data_length < encrypted_length) ? hash_data_length : encrypted_length;

	// to prevent timing attacks, should check entire string
	// don't exit after found to be false
	for (var i = 0; i < max_length; ++i) {
		if (hash_data_length >= i && encrypted_length >= i && hash_data[i] != encrypted[i]) {
			same = false;
		}
	}

	return same;
}

function compare(data, encrypted, callback) {
	/*
		data - [REQUIRED] - data to compare.
		encrypted - [REQUIRED] - data to be compared to.
		callback - [REQUIRED] - a callback to be fired once the data has been compared. uses eio making it asynchronous.
			error - First parameter to the callback detailing any errors.
			same - Second parameter to the callback providing whether the data and encrypted forms match [true | false].
	*/
	if(!callback) {
		throw "No callback function was given."
	}
	process.nextTick(function() {
		var result = null;
		var error = null;
		try {
			result = compareSync(data, encrypted)
		} catch(err) {
			error = err;
		}
		callback(error, result);
	});
}

function getRounds(encrypted) {
	//encrypted - [REQUIRED] - hash from which the number of rounds used should be extracted.
	if(typeof encrypted != "string") {
		throw "Incorrect arguments";
	}
	return Number(encrypted.split("$")[2]);
}

exports.genSaltSync = genSaltSync;
exports.genSalt = genSalt;
exports.hashSync = hashSync;
exports.hash = hash;
exports.compareSync = compareSync;
exports.compare = compare;
exports.getRounds = getRounds;