Subversion Repositories Applications.papyrus

/*
 *      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.
 *
 *      Dojo port by Tom Trenka
 */

dojo.require("dojo.crypto");
dojo.provide("dojo.crypto.SHA1");
dojo.require("dojo.experimental");
dojo.experimental("dojo.crypto.SHA1");
dojo.crypto.SHA1 = new function () {
        var chrsz = 8;
        var mask = (1 << chrsz) - 1;
        function toWord(s) {
                var wa = [];
                for (var i = 0; i < s.length * chrsz; i += chrsz) {
                        wa[i >> 5] |= (s.charCodeAt(i / chrsz) & mask) << (i % 32);
                }
                return wa;
        }
        function toString(wa) {
                var s = [];
                for (var i = 0; i < wa.length * 32; i += chrsz) {
                        s.push(String.fromCharCode((wa[i >> 5] >>> (i % 32)) & mask));
                }
                return s.join("");
        }
        function toHex(wa) {
                var h = "0123456789abcdef";
                var s = [];
                for (var i = 0; i < wa.length * 4; i++) {
                        s.push(h.charAt((wa[i >> 2] >> ((i % 4) * 8 + 4)) & 15) + h.charAt((wa[i >> 2] >> ((i % 4) * 8)) & 15));
                }
                return s.join("");
        }
        function toBase64(wa) {
                var p = "=";
                var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
                var s = [];
                for (var i = 0; i < wa.length * 4; i += 3) {
                        var t = (((wa[i >> 2] >> 8 * (i % 4)) & 255) << 16) | (((wa[i + 1 >> 2] >> 8 * ((i + 1) % 4)) & 255) << 8) | ((wa[i + 2 >> 2] >> 8 * ((i + 2) % 4)) & 255);
                        for (var j = 0; j < 4; j++) {
                                if (i * 8 + j * 6 > wa.length * 32) {
                                        s.push(p);
                                } else {
                                        s.push(tab.charAt((t >> 6 * (3 - j)) & 63));
                                }
                        }
                }
                return s.join("");
        }
        function add(x, y) {
                var l = (x & 65535) + (y & 65535);
                var m = (x >> 16) + (y >> 16) + (l >> 16);
                return (m << 16) | (l & 65535);
        }
        function r(x, n) {
                return (x << n) | (x >>> (32 - n));
        }
        function f(u, v, w) {
                return ((u & v) | (~u & w));
        }
        function g(u, v, w) {
                return ((u & v) | (u & w) | (v & w));
        }
        function h(u, v, w) {
                return (u ^ v ^ w);
        }
        function fn(i, u, v, w) {
                if (i < 20) {
                        return f(u, v, w);
                }
                if (i < 40) {
                        return h(u, v, w);
                }
                if (i < 60) {
                        return g(u, v, w);
                }
                return h(u, v, w);
        }
        function cnst(i) {
                if (i < 20) {
                        return 1518500249;
                }
                if (i < 40) {
                        return 1859775393;
                }
                if (i < 60) {
                        return -1894007588;
                }
                return -899497514;
        }
        function core(x, len) {
                x[len >> 5] |= 128 << (24 - len % 32);
                x[((len + 64 >> 9) << 4) + 15] = len;
                var w = [];
                var a = 1732584193;
                var b = -271733879;
                var c = -1732584194;
                var d = 271733878;
                var e = -1009589776;
                for (var i = 0; i < x.length; i += 16) {
                        var olda = a;
                        var oldb = b;
                        var oldc = c;
                        var oldd = d;
                        var olde = e;
                        for (var j = 0; j < 80; j++) {
                                if (j < 16) {
                                        w[j] = x[i + j];
                                } else {
                                        w[j] = r(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
                                }
                                var t = add(add(r(a, 5), fn(j, b, c, d)), add(add(e, w[j]), cnst(j)));
                                e = d;
                                d = c;
                                c = r(b, 30);
                                b = a;
                                a = t;
                        }
                        a = add(a, olda);
                        b = add(b, oldb);
                        c = add(c, oldc);
                        d = add(d, oldd);
                        e = add(e, olde);
                }
                return [a, b, c, d, e];
        }
        function hmac(data, key) {
                var wa = toWord(key);
                if (wa.length > 16) {
                        wa = core(wa, key.length * chrsz);
                }
                var l = [], r = [];
                for (var i = 0; i < 16; i++) {
                        l[i] = wa[i] ^ 909522486;
                        r[i] = wa[i] ^ 1549556828;
                }
                var h = core(l.concat(toWord(data)), 512 + data.length * chrsz);
                return core(r.concat(h), 640);
        }
        this.compute = function (data, outputType) {
                var out = outputType || dojo.crypto.outputTypes.Base64;
                switch (out) {
                  case dojo.crypto.outputTypes.Hex:
                        return toHex(core(toWord(data), data.length * chrsz));
                  case dojo.crypto.outputTypes.String:
                        return toString(core(toWord(data), data.length * chrsz));
                  default:
                        return toBase64(core(toWord(data), data.length * chrsz));
                }
        };
        this.getHMAC = function (data, key, outputType) {
                var out = outputType || dojo.crypto.outputTypes.Base64;
                switch (out) {
                  case dojo.crypto.outputTypes.Hex:
                        return toHex(hmac(data, key));
                  case dojo.crypto.outputTypes.String:
                        return toString(hmac(data, key));
                  default:
                        return toBase64(hmac(data, key));
                }
        };
}();