mirror of
https://github.com/wu736139669/Monkey-Test.git
synced 2026-08-05 05:55:46 +00:00
148 lines
3.4 KiB
JavaScript
148 lines
3.4 KiB
JavaScript
|
|
/**
|
|
* 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('util').inherits
|
|
|
|
module.exports = function (Buffer, 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, 16*4, 14*4)
|
|
}
|
|
|
|
inherits(Sha256, Hash)
|
|
|
|
Sha256.prototype.init = function () {
|
|
|
|
this._a = 0x6a09e667|0
|
|
this._b = 0xbb67ae85|0
|
|
this._c = 0x3c6ef372|0
|
|
this._d = 0xa54ff53a|0
|
|
this._e = 0x510e527f|0
|
|
this._f = 0x9b05688c|0
|
|
this._g = 0x1f83d9ab|0
|
|
this._h = 0x5be0cd19|0
|
|
|
|
this._len = this._s = 0
|
|
|
|
return this
|
|
}
|
|
|
|
function S (X, n) {
|
|
return (X >>> n) | (X << (32 - n));
|
|
}
|
|
|
|
function R (X, n) {
|
|
return (X >>> n);
|
|
}
|
|
|
|
function Ch (x, y, z) {
|
|
return ((x & y) ^ ((~x) & z));
|
|
}
|
|
|
|
function Maj (x, y, z) {
|
|
return ((x & y) ^ (x & z) ^ (y & z));
|
|
}
|
|
|
|
function Sigma0256 (x) {
|
|
return (S(x, 2) ^ S(x, 13) ^ S(x, 22));
|
|
}
|
|
|
|
function Sigma1256 (x) {
|
|
return (S(x, 6) ^ S(x, 11) ^ S(x, 25));
|
|
}
|
|
|
|
function Gamma0256 (x) {
|
|
return (S(x, 7) ^ S(x, 18) ^ R(x, 3));
|
|
}
|
|
|
|
function Gamma1256 (x) {
|
|
return (S(x, 17) ^ S(x, 19) ^ R(x, 10));
|
|
}
|
|
|
|
Sha256.prototype._update = function(M) {
|
|
|
|
var W = this._w
|
|
var a, b, c, d, e, f, g, h
|
|
var T1, T2
|
|
|
|
a = this._a | 0
|
|
b = this._b | 0
|
|
c = this._c | 0
|
|
d = this._d | 0
|
|
e = this._e | 0
|
|
f = this._f | 0
|
|
g = this._g | 0
|
|
h = this._h | 0
|
|
|
|
for (var j = 0; j < 64; j++) {
|
|
var w = W[j] = j < 16
|
|
? M.readInt32BE(j * 4)
|
|
: Gamma1256(W[j - 2]) + W[j - 7] + Gamma0256(W[j - 15]) + W[j - 16]
|
|
|
|
T1 = h + Sigma1256(e) + Ch(e, f, g) + K[j] + w
|
|
|
|
T2 = Sigma0256(a) + Maj(a, b, c);
|
|
h = g; g = f; f = e; e = d + T1; d = c; c = b; b = a; a = T1 + T2;
|
|
}
|
|
|
|
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
|
|
}
|
|
|
|
return Sha256
|
|
|
|
}
|