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140 lines
5.5 KiB
140 lines
5.5 KiB
var isStr = require('./isStr');
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var strToBytes = require('./strToBytes');
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var hex = require('./hex');
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var bytesToWords = require('./bytesToWords');
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var wordsToBytes = require('./wordsToBytes');
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var isNode = require('./isNode');
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var isArr = require('./isArr');
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exports = function(msg) {
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if (isStr(msg)) msg = strToBytes(msg);
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var m = bytesToWords(msg);
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var l = msg.length * 8;
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var a = 1732584193;
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var b = -271733879;
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var c = -1732584194;
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var d = 271733878;
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for (var i = 0; i < m.length; i++) {
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m[i] =
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(((m[i] << 8) | (m[i] >>> 24)) & 0x00ff00ff) |
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(((m[i] << 24) | (m[i] >>> 8)) & 0xff00ff00);
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}
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m[l >>> 5] |= 0x80 << l % 32;
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m[(((l + 64) >>> 9) << 4) + 14] = l;
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for (var _i = 0; _i < m.length; _i += 16) {
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var aa = a;
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var bb = b;
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var cc = c;
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var dd = d;
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a = FF(a, b, c, d, m[_i + 0], 7, -680876936);
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d = FF(d, a, b, c, m[_i + 1], 12, -389564586);
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c = FF(c, d, a, b, m[_i + 2], 17, 606105819);
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b = FF(b, c, d, a, m[_i + 3], 22, -1044525330);
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a = FF(a, b, c, d, m[_i + 4], 7, -176418897);
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d = FF(d, a, b, c, m[_i + 5], 12, 1200080426);
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c = FF(c, d, a, b, m[_i + 6], 17, -1473231341);
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b = FF(b, c, d, a, m[_i + 7], 22, -45705983);
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a = FF(a, b, c, d, m[_i + 8], 7, 1770035416);
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d = FF(d, a, b, c, m[_i + 9], 12, -1958414417);
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c = FF(c, d, a, b, m[_i + 10], 17, -42063);
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b = FF(b, c, d, a, m[_i + 11], 22, -1990404162);
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a = FF(a, b, c, d, m[_i + 12], 7, 1804603682);
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d = FF(d, a, b, c, m[_i + 13], 12, -40341101);
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c = FF(c, d, a, b, m[_i + 14], 17, -1502002290);
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b = FF(b, c, d, a, m[_i + 15], 22, 1236535329);
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a = GG(a, b, c, d, m[_i + 1], 5, -165796510);
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d = GG(d, a, b, c, m[_i + 6], 9, -1069501632);
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c = GG(c, d, a, b, m[_i + 11], 14, 643717713);
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b = GG(b, c, d, a, m[_i + 0], 20, -373897302);
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a = GG(a, b, c, d, m[_i + 5], 5, -701558691);
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d = GG(d, a, b, c, m[_i + 10], 9, 38016083);
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c = GG(c, d, a, b, m[_i + 15], 14, -660478335);
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b = GG(b, c, d, a, m[_i + 4], 20, -405537848);
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a = GG(a, b, c, d, m[_i + 9], 5, 568446438);
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d = GG(d, a, b, c, m[_i + 14], 9, -1019803690);
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c = GG(c, d, a, b, m[_i + 3], 14, -187363961);
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b = GG(b, c, d, a, m[_i + 8], 20, 1163531501);
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a = GG(a, b, c, d, m[_i + 13], 5, -1444681467);
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d = GG(d, a, b, c, m[_i + 2], 9, -51403784);
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c = GG(c, d, a, b, m[_i + 7], 14, 1735328473);
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b = GG(b, c, d, a, m[_i + 12], 20, -1926607734);
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a = HH(a, b, c, d, m[_i + 5], 4, -378558);
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d = HH(d, a, b, c, m[_i + 8], 11, -2022574463);
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c = HH(c, d, a, b, m[_i + 11], 16, 1839030562);
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b = HH(b, c, d, a, m[_i + 14], 23, -35309556);
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a = HH(a, b, c, d, m[_i + 1], 4, -1530992060);
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d = HH(d, a, b, c, m[_i + 4], 11, 1272893353);
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c = HH(c, d, a, b, m[_i + 7], 16, -155497632);
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b = HH(b, c, d, a, m[_i + 10], 23, -1094730640);
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a = HH(a, b, c, d, m[_i + 13], 4, 681279174);
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d = HH(d, a, b, c, m[_i + 0], 11, -358537222);
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c = HH(c, d, a, b, m[_i + 3], 16, -722521979);
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b = HH(b, c, d, a, m[_i + 6], 23, 76029189);
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a = HH(a, b, c, d, m[_i + 9], 4, -640364487);
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d = HH(d, a, b, c, m[_i + 12], 11, -421815835);
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c = HH(c, d, a, b, m[_i + 15], 16, 530742520);
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b = HH(b, c, d, a, m[_i + 2], 23, -995338651);
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a = II(a, b, c, d, m[_i + 0], 6, -198630844);
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d = II(d, a, b, c, m[_i + 7], 10, 1126891415);
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c = II(c, d, a, b, m[_i + 14], 15, -1416354905);
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b = II(b, c, d, a, m[_i + 5], 21, -57434055);
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a = II(a, b, c, d, m[_i + 12], 6, 1700485571);
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d = II(d, a, b, c, m[_i + 3], 10, -1894986606);
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c = II(c, d, a, b, m[_i + 10], 15, -1051523);
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b = II(b, c, d, a, m[_i + 1], 21, -2054922799);
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a = II(a, b, c, d, m[_i + 8], 6, 1873313359);
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d = II(d, a, b, c, m[_i + 15], 10, -30611744);
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c = II(c, d, a, b, m[_i + 6], 15, -1560198380);
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b = II(b, c, d, a, m[_i + 13], 21, 1309151649);
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a = II(a, b, c, d, m[_i + 4], 6, -145523070);
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d = II(d, a, b, c, m[_i + 11], 10, -1120210379);
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c = II(c, d, a, b, m[_i + 2], 15, 718787259);
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b = II(b, c, d, a, m[_i + 9], 21, -343485551);
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a = (a + aa) >>> 0;
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b = (b + bb) >>> 0;
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c = (c + cc) >>> 0;
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d = (d + dd) >>> 0;
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}
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return hex.encode(wordsToBytes(endian([a, b, c, d])));
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};
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function FF(a, b, c, d, x, s, t) {
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var n = a + ((b & c) | (~b & d)) + (x >>> 0) + t;
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return ((n << s) | (n >>> (32 - s))) + b;
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}
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function GG(a, b, c, d, x, s, t) {
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var n = a + ((b & d) | (c & ~d)) + (x >>> 0) + t;
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return ((n << s) | (n >>> (32 - s))) + b;
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}
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function HH(a, b, c, d, x, s, t) {
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var n = a + (b ^ c ^ d) + (x >>> 0) + t;
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return ((n << s) | (n >>> (32 - s))) + b;
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}
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function II(a, b, c, d, x, s, t) {
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var n = a + (c ^ (b | ~d)) + (x >>> 0) + t;
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return ((n << s) | (n >>> (32 - s))) + b;
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}
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function endian(n) {
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if (n.constructor == Number) {
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return (rotl(n, 8) & 0x00ff00ff) | (rotl(n, 24) & 0xff00ff00);
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}
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for (var i = 0; i < n.length; i++) n[i] = endian(n[i]);
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return n;
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}
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function rotl(n, b) {
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return (n << b) | (n >>> (32 - b));
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}
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if (isNode) {
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var crypto = eval('require')('crypto');
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exports = function(msg) {
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if (isArr(msg)) {
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msg = Buffer.from(msg);
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}
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var hash = crypto.createHash('md5');
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hash.update(msg);
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return hash.digest('hex');
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};
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}
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module.exports = exports;
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