/base/000_base/node_modules/cryptojs/lib/SHA256.js |
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(function(){ |
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var C = (typeof window === 'undefined') ? require('./Crypto').Crypto : window.Crypto; |
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// Shortcuts |
var util = C.util, |
charenc = C.charenc, |
UTF8 = charenc.UTF8, |
Binary = charenc.Binary; |
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// Constants |
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 ]; |
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// Public API |
var SHA256 = C.SHA256 = function (message, options) { |
var digestbytes = util.wordsToBytes(SHA256._sha256(message)); |
return options && options.asBytes ? digestbytes : |
options && options.asString ? Binary.bytesToString(digestbytes) : |
util.bytesToHex(digestbytes); |
}; |
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// The core |
SHA256._sha256 = function (message) { |
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// Convert to byte array |
if (message.constructor == String) message = UTF8.stringToBytes(message); |
/* else, assume byte array already */ |
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var m = util.bytesToWords(message), |
l = message.length * 8, |
H = [ 0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, |
0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19 ], |
w = [], |
a, b, c, d, e, f, g, h, i, j, |
t1, t2; |
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// Padding |
m[l >> 5] |= 0x80 << (24 - l % 32); |
m[((l + 64 >> 9) << 4) + 15] = l; |
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for (var i = 0; i < m.length; i += 16) { |
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a = H[0]; |
b = H[1]; |
c = H[2]; |
d = H[3]; |
e = H[4]; |
f = H[5]; |
g = H[6]; |
h = H[7]; |
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for (var j = 0; j < 64; j++) { |
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if (j < 16) w[j] = m[j + i]; |
else { |
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var gamma0x = w[j - 15], |
gamma1x = w[j - 2], |
gamma0 = ((gamma0x << 25) | (gamma0x >>> 7)) ^ |
((gamma0x << 14) | (gamma0x >>> 18)) ^ |
(gamma0x >>> 3), |
gamma1 = ((gamma1x << 15) | (gamma1x >>> 17)) ^ |
((gamma1x << 13) | (gamma1x >>> 19)) ^ |
(gamma1x >>> 10); |
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w[j] = gamma0 + (w[j - 7] >>> 0) + |
gamma1 + (w[j - 16] >>> 0); |
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} |
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var ch = e & f ^ ~e & g, |
maj = a & b ^ a & c ^ b & c, |
sigma0 = ((a << 30) | (a >>> 2)) ^ |
((a << 19) | (a >>> 13)) ^ |
((a << 10) | (a >>> 22)), |
sigma1 = ((e << 26) | (e >>> 6)) ^ |
((e << 21) | (e >>> 11)) ^ |
((e << 7) | (e >>> 25)); |
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t1 = (h >>> 0) + sigma1 + ch + (K[j]) + (w[j] >>> 0); |
t2 = sigma0 + maj; |
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h = g; |
g = f; |
f = e; |
e = (d + t1) >>> 0; |
d = c; |
c = b; |
b = a; |
a = (t1 + t2) >>> 0; |
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} |
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H[0] += a; |
H[1] += b; |
H[2] += c; |
H[3] += d; |
H[4] += e; |
H[5] += f; |
H[6] += g; |
H[7] += h; |
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} |
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return H; |
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}; |
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// Package private blocksize |
SHA256._blocksize = 16; |
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SHA256._digestsize = 32; |
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})(); |