SHA-256 hash (from fbevents.js)

sha256.js

var sha256hash = (function() {
    "use strict";
    function a(a) {
        var b = "", c = void 0, d;
        for (var e = 0; e < a.length; e++)
            c = a.charCodeAt(e),
            d = e + 1 < a.length ? a.charCodeAt(e + 1) : 0,
            c >= 55296 && c <= 56319 && d >= 56320 && d <= 57343 && (c = 65536 + ((c & 1023) << 10) + (d & 1023),
            e++),
            c <= 127 ? b += String.fromCharCode(c) : c <= 2047 ? b += String.fromCharCode(192 | c >>> 6 & 31, 128 | c & 63) : c <= 65535 ? b += String.fromCharCode(224 | c >>> 12 & 15, 128 | c >>> 6 & 63, 128 | c & 63) : c <= 2097151 && (b += String.fromCharCode(240 | c >>> 18 & 7, 128 | c >>> 12 & 63, 128 | c >>> 6 & 63, 128 | c & 63));
        return b
    }
    function b(a, b) {
        return b >>> a | b << 32 - a
    }
    function c(a, b, c) {
        return a & b ^ ~a & c
    }
    function d(a, b, c) {
        return a & b ^ a & c ^ b & c
    }
    function e(a) {
        return b(2, a) ^ b(13, a) ^ b(22, a)
    }
    function f(a) {
        return b(6, a) ^ b(11, a) ^ b(25, a)
    }
    function g(a) {
        return b(7, a) ^ b(18, a) ^ a >>> 3
    }
    function h(a) {
        return b(17, a) ^ b(19, a) ^ a >>> 10
    }
    function i(a, b) {
        return a[b & 15] += h(a[b + 14 & 15]) + a[b + 9 & 15] + g(a[b + 1 & 15])
    }
    var k = [1116352408, 1899447441, 3049323471, 3921009573, 961987163, 1508970993, 2453635748, 2870763221, 3624381080, 310598401, 607225278, 1426881987, 1925078388, 2162078206, 2614888103, 3248222580, 3835390401, 4022224774, 264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986, 2554220882, 2821834349, 2952996808, 3210313671, 3336571891, 3584528711, 113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291, 1695183700, 1986661051, 2177026350, 2456956037, 2730485921, 2820302411, 3259730800, 3345764771, 3516065817, 3600352804, 4094571909, 275423344, 430227734, 506948616, 659060556, 883997877, 958139571, 1322822218, 1537002063, 1747873779, 1955562222, 2024104815, 2227730452, 2361852424, 2428436474, 2756734187, 3204031479, 3329325298]
      , l = new Array(8)
      , m = new Array(2)
      , n = new Array(64)
      , o = new Array(16)
      , p = "0123456789abcdef";
    function q(a, b) {
        var c = (a & 65535) + (b & 65535);
        a = (a >> 16) + (b >> 16) + (c >> 16);
        return a << 16 | c & 65535
    }
    function r() {
        m[0] = m[1] = 0,
        l[0] = 1779033703,
        l[1] = 3144134277,
        l[2] = 1013904242,
        l[3] = 2773480762,
        l[4] = 1359893119,
        l[5] = 2600822924,
        l[6] = 528734635,
        l[7] = 1541459225
    }
    function s() {
        var a = void 0
          , b = void 0
          , g = void 0
          , h = void 0
          , j = void 0
          , m = void 0
          , p = void 0
          , r = void 0
          , s = void 0
          , t = void 0;
        g = l[0];
        h = l[1];
        j = l[2];
        m = l[3];
        p = l[4];
        r = l[5];
        s = l[6];
        t = l[7];
        for (var u = 0; u < 16; u++)
            o[u] = n[(u << 2) + 3] | n[(u << 2) + 2] << 8 | n[(u << 2) + 1] << 16 | n[u << 2] << 24;
        for (u = 0; u < 64; u++)
            a = t + f(p) + c(p, r, s) + k[u],
            u < 16 ? a += o[u] : a += i(o, u),
            b = e(g) + d(g, h, j),
            t = s,
            s = r,
            r = p,
            p = q(m, a),
            m = j,
            j = h,
            h = g,
            g = q(a, b);
        l[0] += g;
        l[1] += h;
        l[2] += j;
        l[3] += m;
        l[4] += p;
        l[5] += r;
        l[6] += s;
        l[7] += t
    }
    function t(a, b) {
        var c = void 0, d, e = 0;
        d = m[0] >> 3 & 63;
        var f = b & 63;
        (m[0] += b << 3) < b << 3 && m[1]++;
        m[1] += b >> 29;
        for (c = 0; c + 63 < b; c += 64) {
            for (var g = d; g < 64; g++)
                n[g] = a.charCodeAt(e++);
            s();
            d = 0
        }
        for (g = 0; g < f; g++)
            n[g] = a.charCodeAt(e++)
    }
    function u() {
        var a = m[0] >> 3 & 63;
        n[a++] = 128;
        if (a <= 56)
            for (var b = a; b < 56; b++)
                n[b] = 0;
        else {
            for (b = a; b < 64; b++)
                n[b] = 0;
            s();
            for (a = 0; a < 56; a++)
                n[a] = 0
        }
        n[56] = m[1] >>> 24 & 255;
        n[57] = m[1] >>> 16 & 255;
        n[58] = m[1] >>> 8 & 255;
        n[59] = m[1] & 255;
        n[60] = m[0] >>> 24 & 255;
        n[61] = m[0] >>> 16 & 255;
        n[62] = m[0] >>> 8 & 255;
        n[63] = m[0] & 255;
        s()
    }
    function v() {
        var a = "";
        for (var b = 0; b < 8; b++)
            for (var c = 28; c >= 0; c -= 4)
                a += p.charAt(l[b] >>> c & 15);
        return a
    }
    function w(a) {
        var b = 0;
        for (var c = 0; c < 8; c++)
            for (var d = 28; d >= 0; d -= 4)
                a[b++] = p.charCodeAt(l[c] >>> d & 15)
    }
    function x(a, b) {
        r();
        t(a, a.length);
        u();
        if (b)
            w(b);
        else
            return v()
    }
    function y(b) {
        var c = arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : !0
          , d = arguments[2];
        if (b === null || b === void 0)
            return null;
        var e = b;
        c && (e = a(b));
        return x(e, d)
    }
    return y
}
)();