Javascript SHA256 hashing

sha256.js

/**
 *
 *  Secure Hash Algorithm (SHA256)
 *  http://www.webtoolkit.info/
 *
 *  Original code by Angel Marin, Paul Johnston.
 *
 **/
function sha256(s) {
    var chrsz = 8;
    var hexcase = 0;
    function safe_add(x, y) {
        var lsw = (x & 0xFFFF) + (y & 0xFFFF);
        var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
        return (msw << 16) | (lsw & 0xFFFF);
    }
    function S(X, n) {
        return (X >>> n) | (X << (32 - n));
    }
    function R(X, n) {
        return (X >>> n);
    }
    function Ch(x, y, z) {
        return ((x & y) ^ ((~x) & z));
    }
    function Maj(x, y, z) {
        return ((x & y) ^ (x & z) ^ (y & z));
    }
    function Sigma0256(x) {
        return (S(x, 2) ^ S(x, 13) ^ S(x, 22));
    }
    function Sigma1256(x) {
        return (S(x, 6) ^ S(x, 11) ^ S(x, 25));
    }
    function Gamma0256(x) {
        return (S(x, 7) ^ S(x, 18) ^ R(x, 3));
    }
    function Gamma1256(x) {
        return (S(x, 17) ^ S(x, 19) ^ R(x, 10));
    }
    function core_sha256(m, l) {
        var K = new Array(0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5, 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, 0xE49B69C1, 0xEFBE4786, 0xFC19DC6, 0x240CA1CC, 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, 0xC6E00BF3, 0xD5A79147, 0x6CA6351, 0x14292967, 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3, 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2);
        var HASH = new Array(0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19);
        var W = new Array(64);
        var a, b, c, d, e, f, g, h, i, j;
        var T1, T2;
        m[l >> 5] |= 0x80 << (24 - l % 32);
        m[((l + 64 >> 9) << 4) + 15] = l;
        for (var i = 0; i < m.length; i += 16) {
            a = HASH[0];
            b = HASH[1];
            c = HASH[2];
            d = HASH[3];
            e = HASH[4];
            f = HASH[5];
            g = HASH[6];
            h = HASH[7];
            for (var j = 0; j < 64; j++) {
                if (j < 16) W[j] = m[j + i];
                else W[j] = safe_add(safe_add(safe_add(Gamma1256(W[j - 2]), W[j - 7]), Gamma0256(W[j - 15])), W[j - 16]);
                T1 = safe_add(safe_add(safe_add(safe_add(h, Sigma1256(e)), Ch(e, f, g)), K[j]), W[j]);
                T2 = safe_add(Sigma0256(a), Maj(a, b, c));
                h = g;
                g = f;
                f = e;
                e = safe_add(d, T1);
                d = c;
                c = b;
                b = a;
                a = safe_add(T1, T2);
            }
            HASH[0] = safe_add(a, HASH[0]);
            HASH[1] = safe_add(b, HASH[1]);
            HASH[2] = safe_add(c, HASH[2]);
            HASH[3] = safe_add(d, HASH[3]);
            HASH[4] = safe_add(e, HASH[4]);
            HASH[5] = safe_add(f, HASH[5]);
            HASH[6] = safe_add(g, HASH[6]);
            HASH[7] = safe_add(h, HASH[7]);
        }
        return HASH;
    }
    function str2binb(str) {
        var bin = Array();
        var mask = (1 << chrsz) - 1;
        for (var i = 0; i < str.length * chrsz; i += chrsz) {
            bin[i >> 5] |= (str.charCodeAt(i / chrsz) & mask) << (24 - i % 32);
        }
        return bin;
    }
    function Utf8Encode(string) {
        string = string.replace(/\r\n/g, "\n");
        var utftext = "";
        for (var n = 0; n < string.length; n++) {
            var c = string.charCodeAt(n);
            if (c < 128) {
                utftext += String.fromCharCode(c);
            } else if ((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            } else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }
        }
        return utftext;
    }
    function binb2hex(binarray) {
        var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
        var str = "";
        for (var i = 0; i < binarray.length * 4; i++) {
            str += hex_tab.charAt((binarray[i >> 2] >> ((3 - i % 4) * 8 + 4)) & 0xF) +
                hex_tab.charAt((binarray[i >> 2] >> ((3 - i % 4) * 8)) & 0xF);
        }
        return str;
    }
    s = Utf8Encode(s);
    return binb2hex(core_sha256(str2binb(s), s.length * chrsz));
}

sha256.min.js

/**
 *
 *  Secure Hash Algorithm (SHA256)
 *  http://www.webtoolkit.info/
 *
 *  Original code by Angel Marin, Paul Johnston.
 *
 **/
function sha256(r){var n=8,t=0;function e(r,n){var t=(65535&r)+(65535&n);return(r>>16)+(n>>16)+(t>>16)<<16|65535&t}function o(r,n){return r>>>n|r<<32-n}function a(r,n){return r>>>n}function u(r,n,t){return r&n^~r&t}function f(r,n,t){return r&n^r&t^n&t}function c(r){return o(r,2)^o(r,13)^o(r,22)}function i(r){return o(r,6)^o(r,11)^o(r,25)}function h(r){return o(r,7)^o(r,18)^a(r,3)}return function(r){for(var n=t?"0123456789ABCDEF":"0123456789abcdef",e="",o=0;o<4*r.length;o++)e+=n.charAt(r[o>>2]>>8*(3-o%4)+4&15)+n.charAt(r[o>>2]>>8*(3-o%4)&15);return e}(function(r,n){var t,C,g,d,v,A,l,m,S,y,w,b=new Array(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),p=new Array(1779033703,3144134277,1013904242,2773480762,1359893119,2600822924,528734635,1541459225),s=new Array(64);r[n>>5]|=128<<24-n%32,r[15+(n+64>>9<<4)]=n;for(var B=0;B<r.length;B+=16){t=p[0],C=p[1],g=p[2],d=p[3],v=p[4],A=p[5],l=p[6],m=p[7];for(var D=0;D<64;D++)s[D]=D<16?r[D+B]:e(e(e(o(w=s[D-2],17)^o(w,19)^a(w,10),s[D-7]),h(s[D-15])),s[D-16]),S=e(e(e(e(m,i(v)),u(v,A,l)),b[D]),s[D]),y=e(c(t),f(t,C,g)),m=l,l=A,A=v,v=e(d,S),d=g,g=C,C=t,t=e(S,y);p[0]=e(t,p[0]),p[1]=e(C,p[1]),p[2]=e(g,p[2]),p[3]=e(d,p[3]),p[4]=e(v,p[4]),p[5]=e(A,p[5]),p[6]=e(l,p[6]),p[7]=e(m,p[7])}return p}(function(r){for(var t=Array(),e=(1<<n)-1,o=0;o<r.length*n;o+=n)t[o>>5]|=(r.charCodeAt(o/n)&e)<<24-o%32;return t}(r=function(r){r=r.replace(/\r\n/g,"\n");for(var n="",t=0;t<r.length;t++){var e=r.charCodeAt(t);e<128?n+=String.fromCharCode(e):e>127&&e<2048?(n+=String.fromCharCode(e>>6|192),n+=String.fromCharCode(63&e|128)):(n+=String.fromCharCode(e>>12|224),n+=String.fromCharCode(e>>6&63|128),n+=String.fromCharCode(63&e|128))}return n}(r)),r.length*n))}