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53 lines
1.1 KiB
53 lines
1.1 KiB
/** |
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* A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined |
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* in FIPS 180-2 |
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* Version 2.2-beta Copyright Angel Marin, Paul Johnston 2000 - 2009. |
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* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet |
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* |
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*/ |
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var inherits = require('inherits') |
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var Sha256 = require('./sha256') |
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var Hash = require('./hash') |
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var Buffer = require('safe-buffer').Buffer |
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var W = new Array(64) |
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function Sha224 () { |
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this.init() |
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this._w = W // new Array(64) |
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Hash.call(this, 64, 56) |
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} |
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inherits(Sha224, Sha256) |
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Sha224.prototype.init = function () { |
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this._a = 0xc1059ed8 |
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this._b = 0x367cd507 |
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this._c = 0x3070dd17 |
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this._d = 0xf70e5939 |
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this._e = 0xffc00b31 |
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this._f = 0x68581511 |
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this._g = 0x64f98fa7 |
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this._h = 0xbefa4fa4 |
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return this |
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} |
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Sha224.prototype._hash = function () { |
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var H = Buffer.allocUnsafe(28) |
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H.writeInt32BE(this._a, 0) |
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H.writeInt32BE(this._b, 4) |
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H.writeInt32BE(this._c, 8) |
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H.writeInt32BE(this._d, 12) |
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H.writeInt32BE(this._e, 16) |
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H.writeInt32BE(this._f, 20) |
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H.writeInt32BE(this._g, 24) |
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return H |
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} |
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module.exports = Sha224
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