You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
81 lines
2.2 KiB
81 lines
2.2 KiB
import { inherits as inherits$0 } from "util";
|
|
import Hash from "./hash";
|
|
/*
|
|
* A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
|
|
* in FIPS PUB 180-1
|
|
* Version 2.1a Copyright Paul Johnston 2000 - 2002.
|
|
* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
|
|
* Distributed under the BSD License
|
|
* See http://pajhome.org.uk/crypt/md5 for details.
|
|
*/
|
|
var inherits = { inherits: inherits$0 }.inherits;
|
|
var K = [
|
|
0x5a827999, 0x6ed9eba1, 0x8f1bbcdc | 0, 0xca62c1d6 | 0
|
|
];
|
|
var W = new Array(80);
|
|
function Sha1() {
|
|
this.init();
|
|
this._w = W;
|
|
Hash.call(this, 64, 56);
|
|
}
|
|
inherits(Sha1, Hash);
|
|
Sha1.prototype.init = function () {
|
|
this._a = 0x67452301;
|
|
this._b = 0xefcdab89;
|
|
this._c = 0x98badcfe;
|
|
this._d = 0x10325476;
|
|
this._e = 0xc3d2e1f0;
|
|
return this;
|
|
};
|
|
function rotl1(num) {
|
|
return (num << 1) | (num >>> 31);
|
|
}
|
|
function rotl5(num) {
|
|
return (num << 5) | (num >>> 27);
|
|
}
|
|
function rotl30(num) {
|
|
return (num << 30) | (num >>> 2);
|
|
}
|
|
function ft(s, b, c, d) {
|
|
if (s === 0)
|
|
return (b & c) | ((~b) & d);
|
|
if (s === 2)
|
|
return (b & c) | (b & d) | (c & d);
|
|
return b ^ c ^ d;
|
|
}
|
|
Sha1.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;
|
|
for (var i = 0; i < 16; ++i)
|
|
W[i] = M.readInt32BE(i * 4);
|
|
for (; i < 80; ++i)
|
|
W[i] = rotl1(W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16]);
|
|
for (var j = 0; j < 80; ++j) {
|
|
var s = ~~(j / 20);
|
|
var t = (rotl5(a) + ft(s, b, c, d) + e + W[j] + K[s]) | 0;
|
|
e = d;
|
|
d = c;
|
|
c = rotl30(b);
|
|
b = a;
|
|
a = t;
|
|
}
|
|
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;
|
|
};
|
|
Sha1.prototype._hash = function () {
|
|
var H = Buffer.allocUnsafe(20);
|
|
H.writeInt32BE(this._a | 0, 0);
|
|
H.writeInt32BE(this._b | 0, 4);
|
|
H.writeInt32BE(this._c | 0, 8);
|
|
H.writeInt32BE(this._d | 0, 12);
|
|
H.writeInt32BE(this._e | 0, 16);
|
|
return H;
|
|
};
|
|
export default Sha1;
|
|
|