Quantumult-X/Scripts/util/Crypto.js

/*!
 * Joseph Myer's md5() algorithm wrapped in a self-invoked function to prevent
 */


function Crypto() {
    function md5cycle(x, k) {
        let a = x[0], b = x[1], c = x[2], d = x[3];

        a = ff(a, b, c, d, k[0], 7, -680876936);
        d = ff(d, a, b, c, k[1], 12, -389564586);
        c = ff(c, d, a, b, k[2], 17, 606105819);
        b = ff(b, c, d, a, k[3], 22, -1044525330);
        a = ff(a, b, c, d, k[4], 7, -176418897);
        d = ff(d, a, b, c, k[5], 12, 1200080426);
        c = ff(c, d, a, b, k[6], 17, -1473231341);
        b = ff(b, c, d, a, k[7], 22, -45705983);
        a = ff(a, b, c, d, k[8], 7, 1770035416);
        d = ff(d, a, b, c, k[9], 12, -1958414417);
        c = ff(c, d, a, b, k[10], 17, -42063);
        b = ff(b, c, d, a, k[11], 22, -1990404162);
        a = ff(a, b, c, d, k[12], 7, 1804603682);
        d = ff(d, a, b, c, k[13], 12, -40341101);
        c = ff(c, d, a, b, k[14], 17, -1502002290);
        b = ff(b, c, d, a, k[15], 22, 1236535329);

        a = gg(a, b, c, d, k[1], 5, -165796510);
        d = gg(d, a, b, c, k[6], 9, -1069501632);
        c = gg(c, d, a, b, k[11], 14, 643717713);
        b = gg(b, c, d, a, k[0], 20, -373897302);
        a = gg(a, b, c, d, k[5], 5, -701558691);
        d = gg(d, a, b, c, k[10], 9, 38016083);
        c = gg(c, d, a, b, k[15], 14, -660478335);
        b = gg(b, c, d, a, k[4], 20, -405537848);
        a = gg(a, b, c, d, k[9], 5, 568446438);
        d = gg(d, a, b, c, k[14], 9, -1019803690);
        c = gg(c, d, a, b, k[3], 14, -187363961);
        b = gg(b, c, d, a, k[8], 20, 1163531501);
        a = gg(a, b, c, d, k[13], 5, -1444681467);
        d = gg(d, a, b, c, k[2], 9, -51403784);
        c = gg(c, d, a, b, k[7], 14, 1735328473);
        b = gg(b, c, d, a, k[12], 20, -1926607734);

        a = hh(a, b, c, d, k[5], 4, -378558);
        d = hh(d, a, b, c, k[8], 11, -2022574463);
        c = hh(c, d, a, b, k[11], 16, 1839030562);
        b = hh(b, c, d, a, k[14], 23, -35309556);
        a = hh(a, b, c, d, k[1], 4, -1530992060);
        d = hh(d, a, b, c, k[4], 11, 1272893353);
        c = hh(c, d, a, b, k[7], 16, -155497632);
        b = hh(b, c, d, a, k[10], 23, -1094730640);
        a = hh(a, b, c, d, k[13], 4, 681279174);
        d = hh(d, a, b, c, k[0], 11, -358537222);
        c = hh(c, d, a, b, k[3], 16, -722521979);
        b = hh(b, c, d, a, k[6], 23, 76029189);
        a = hh(a, b, c, d, k[9], 4, -640364487);
        d = hh(d, a, b, c, k[12], 11, -421815835);
        c = hh(c, d, a, b, k[15], 16, 530742520);
        b = hh(b, c, d, a, k[2], 23, -995338651);

        a = ii(a, b, c, d, k[0], 6, -198630844);
        d = ii(d, a, b, c, k[7], 10, 1126891415);
        c = ii(c, d, a, b, k[14], 15, -1416354905);
        b = ii(b, c, d, a, k[5], 21, -57434055);
        a = ii(a, b, c, d, k[12], 6, 1700485571);
        d = ii(d, a, b, c, k[3], 10, -1894986606);
        c = ii(c, d, a, b, k[10], 15, -1051523);
        b = ii(b, c, d, a, k[1], 21, -2054922799);
        a = ii(a, b, c, d, k[8], 6, 1873313359);
        d = ii(d, a, b, c, k[15], 10, -30611744);
        c = ii(c, d, a, b, k[6], 15, -1560198380);
        b = ii(b, c, d, a, k[13], 21, 1309151649);
        a = ii(a, b, c, d, k[4], 6, -145523070);
        d = ii(d, a, b, c, k[11], 10, -1120210379);
        c = ii(c, d, a, b, k[2], 15, 718787259);
        b = ii(b, c, d, a, k[9], 21, -343485551);

        x[0] = add32(a, x[0]);
        x[1] = add32(b, x[1]);
        x[2] = add32(c, x[2]);
        x[3] = add32(d, x[3]);
    }

    function cmn(q, a, b, x, s, t) {
        a = add32(add32(a, q), add32(x, t));
        return add32((a << s) | (a >>> (32 - s)), b);
    }

    function ff(a, b, c, d, x, s, t) {
        return cmn((b & c) | ((~b) & d), a, b, x, s, t);
    }

    function gg(a, b, c, d, x, s, t) {
        return cmn((b & d) | (c & (~d)), a, b, x, s, t);
    }

    function hh(a, b, c, d, x, s, t) {
        return cmn(b ^ c ^ d, a, b, x, s, t);
    }

    function ii(a, b, c, d, x, s, t) {
        return cmn(c ^ (b | (~d)), a, b, x, s, t);
    }

    function md51(s) {
        // Converts the string to UTF-8 "bytes" when necessary
        if (/[\x80-\xFF]/.test(s)) {
            s = unescape(encodeURI(s));
        }
        txt = '';
        let n = s.length, state = [1732584193, -271733879, -1732584194, 271733878], i;
        for (i = 64; i <= s.length; i += 64) {
            md5cycle(state, md5blk(s.substring(i - 64, i)));
        }
        s = s.substring(i - 64);
        let tail = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
        for (i = 0; i < s.length; i++)
            tail[i >> 2] |= s.charCodeAt(i) << ((i % 4) << 3);
        tail[i >> 2] |= 0x80 << ((i % 4) << 3);
        if (i > 55) {
            md5cycle(state, tail);
            for (i = 0; i < 16; i++) tail[i] = 0;
        }
        tail[14] = n * 8;
        md5cycle(state, tail);
        return state;
    }

    function md5blk(s) { /* I figured global was faster.   */
        let md5blks = [], i; /* Andy King said do it this way. */
        for (i = 0; i < 64; i += 4) {
            md5blks[i >> 2] = s.charCodeAt(i) +
                (s.charCodeAt(i + 1) << 8) +
                (s.charCodeAt(i + 2) << 16) +
                (s.charCodeAt(i + 3) << 24);
        }
        return md5blks;
    }

    let hex_chr = '0123456789abcdef'.split('');

    function rhex(n) {
        let s = '', j = 0;
        for (; j < 4; j++)
            s += hex_chr[(n >> (j * 8 + 4)) & 0x0F] +
                hex_chr[(n >> (j * 8)) & 0x0F];
        return s;
    }

    function hex(x) {
        for (let i = 0; i < x.length; i++)
            x[i] = rhex(x[i]);
        return x.join('');
    }

    md5 = function (s) {
        return hex(md51(s));
    }

    /* this function is much faster, so if possible we use it. Some IEs are the
    only ones I know of that need the idiotic second function, generated by an
    if clause.  */
    function add32(a, b) {
        return (a + b) & 0xFFFFFFFF;
    }

    let crypto = {
        md5: md5
    };
    return crypto;
}