| /** | |
| * 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 Sha256 = require('./sha256') | |
| var Hash = require('./hash') | |
| var Buffer = require('safe-buffer').Buffer | |
| var W = new Array(64) | |
| function Sha224 () { | |
| this.init() | |
| this._w = W // new Array(64) | |
| Hash.call(this, 64, 56) | |
| } | |
| inherits(Sha224, Sha256) | |
| Sha224.prototype.init = function () { | |
| this._a = 0xc1059ed8 | |
| this._b = 0x367cd507 | |
| this._c = 0x3070dd17 | |
| this._d = 0xf70e5939 | |
| this._e = 0xffc00b31 | |
| this._f = 0x68581511 | |
| this._g = 0x64f98fa7 | |
| this._h = 0xbefa4fa4 | |
| return this | |
| } | |
| Sha224.prototype._hash = function () { | |
| var H = Buffer.allocUnsafe(28) | |
| 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) | |
| return H | |
| } | |
| module.exports = Sha224 |