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Diffstat (limited to 'node_modules/sha.js/sha256.js')
-rw-r--r-- | node_modules/sha.js/sha256.js | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/node_modules/sha.js/sha256.js b/node_modules/sha.js/sha256.js new file mode 100644 index 000000000..69b60fef0 --- /dev/null +++ b/node_modules/sha.js/sha256.js @@ -0,0 +1,134 @@ +/** + * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined + * in FIPS 180-2 + * Version 2.2-beta Copyright Angel Marin, Paul Johnston 2000 - 2009. + * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet + * + */ + +var inherits = require('inherits') +var Hash = require('./hash') + +var K = [ + 0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, + 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5, + 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, + 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, + 0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC, + 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, + 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, + 0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967, + 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, + 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, + 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, + 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, + 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, + 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3, + 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, + 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2 +] + +var W = new Array(64) + +function Sha256 () { + this.init() + + this._w = W // new Array(64) + + Hash.call(this, 64, 56) +} + +inherits(Sha256, Hash) + +Sha256.prototype.init = function () { + this._a = 0x6a09e667 + this._b = 0xbb67ae85 + this._c = 0x3c6ef372 + this._d = 0xa54ff53a + this._e = 0x510e527f + this._f = 0x9b05688c + this._g = 0x1f83d9ab + this._h = 0x5be0cd19 + + return this +} + +function ch (x, y, z) { + return z ^ (x & (y ^ z)) +} + +function maj (x, y, z) { + return (x & y) | (z & (x | y)) +} + +function sigma0 (x) { + return (x >>> 2 | x << 30) ^ (x >>> 13 | x << 19) ^ (x >>> 22 | x << 10) +} + +function sigma1 (x) { + return (x >>> 6 | x << 26) ^ (x >>> 11 | x << 21) ^ (x >>> 25 | x << 7) +} + +function gamma0 (x) { + return (x >>> 7 | x << 25) ^ (x >>> 18 | x << 14) ^ (x >>> 3) +} + +function gamma1 (x) { + return (x >>> 17 | x << 15) ^ (x >>> 19 | x << 13) ^ (x >>> 10) +} + +Sha256.prototype._update = function (M) { + var W = this._w + + var a = this._a | 0 + var b = this._b | 0 + var c = this._c | 0 + var d = this._d | 0 + var e = this._e | 0 + var f = this._f | 0 + var g = this._g | 0 + var h = this._h | 0 + + for (var i = 0; i < 16; ++i) W[i] = M.readInt32BE(i * 4) + for (; i < 64; ++i) W[i] = (gamma1(W[i - 2]) + W[i - 7] + gamma0(W[i - 15]) + W[i - 16]) | 0 + + for (var j = 0; j < 64; ++j) { + var T1 = (h + sigma1(e) + ch(e, f, g) + K[j] + W[j]) | 0 + var T2 = (sigma0(a) + maj(a, b, c)) | 0 + + h = g + g = f + f = e + e = (d + T1) | 0 + d = c + c = b + b = a + a = (T1 + T2) | 0 + } + + this._a = (a + this._a) | 0 + this._b = (b + this._b) | 0 + this._c = (c + this._c) | 0 + this._d = (d + this._d) | 0 + this._e = (e + this._e) | 0 + this._f = (f + this._f) | 0 + this._g = (g + this._g) | 0 + this._h = (h + this._h) | 0 +} + +Sha256.prototype._hash = function () { + var H = new Buffer(32) + + H.writeInt32BE(this._a, 0) + H.writeInt32BE(this._b, 4) + H.writeInt32BE(this._c, 8) + H.writeInt32BE(this._d, 12) + H.writeInt32BE(this._e, 16) + H.writeInt32BE(this._f, 20) + H.writeInt32BE(this._g, 24) + H.writeInt32BE(this._h, 28) + + return H +} + +module.exports = Sha256 |