robert@0: /* robert@0: * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message robert@0: * Digest Algorithm, as defined in RFC 1321. robert@0: * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002. robert@0: * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet robert@0: * Distributed under the BSD License robert@0: * See http://pajhome.org.uk/crypt/md5 for more info. robert@0: */ robert@0: robert@0: /* robert@0: * Configurable variables. You may need to tweak these to be compatible with robert@0: * the server-side, but the defaults work in most cases. robert@0: */ robert@0: var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */ robert@0: var b64pad = ""; /* base-64 pad character. "=" for strict RFC compliance */ robert@0: var chrsz = 8; /* bits per input character. 8 - ASCII; 16 - Unicode */ robert@0: robert@0: /* robert@0: * These are the functions you'll usually want to call robert@0: * They take string arguments and return either hex or base-64 encoded strings robert@0: */ robert@0: function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));} robert@0: function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));} robert@0: function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));} robert@0: function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); } robert@0: function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); } robert@0: function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); } robert@0: robert@0: /* robert@0: * Perform a simple self-test to see if the VM is working robert@0: */ robert@0: function md5_vm_test() robert@0: { robert@0: return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72"; robert@0: } robert@0: robert@0: /* robert@0: * Calculate the MD5 of an array of little-endian words, and a bit length robert@0: */ robert@0: function core_md5(x, len) robert@0: { robert@0: /* append padding */ robert@0: x[len >> 5] |= 0x80 << ((len) % 32); robert@0: x[(((len + 64) >>> 9) << 4) + 14] = len; robert@0: robert@0: var a = 1732584193; robert@0: var b = -271733879; robert@0: var c = -1732584194; robert@0: var d = 271733878; robert@0: robert@0: for(var i = 0; i < x.length; i += 16) robert@0: { robert@0: var olda = a; robert@0: var oldb = b; robert@0: var oldc = c; robert@0: var oldd = d; robert@0: robert@0: a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936); robert@0: d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586); robert@0: c = md5_ff(c, d, a, b, x[i+ 2], 17, 606105819); robert@0: b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330); robert@0: a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897); robert@0: d = md5_ff(d, a, b, c, x[i+ 5], 12, 1200080426); robert@0: c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341); robert@0: b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983); robert@0: a = md5_ff(a, b, c, d, x[i+ 8], 7 , 1770035416); robert@0: d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417); robert@0: c = md5_ff(c, d, a, b, x[i+10], 17, -42063); robert@0: b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162); robert@0: a = md5_ff(a, b, c, d, x[i+12], 7 , 1804603682); robert@0: d = md5_ff(d, a, b, c, x[i+13], 12, -40341101); robert@0: c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290); robert@0: b = md5_ff(b, c, d, a, x[i+15], 22, 1236535329); robert@0: robert@0: a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510); robert@0: d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632); robert@0: c = md5_gg(c, d, a, b, x[i+11], 14, 643717713); robert@0: b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302); robert@0: a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691); robert@0: d = md5_gg(d, a, b, c, x[i+10], 9 , 38016083); robert@0: c = md5_gg(c, d, a, b, x[i+15], 14, -660478335); robert@0: b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848); robert@0: a = md5_gg(a, b, c, d, x[i+ 9], 5 , 568446438); robert@0: d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690); robert@0: c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961); robert@0: b = md5_gg(b, c, d, a, x[i+ 8], 20, 1163531501); robert@0: a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467); robert@0: d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784); robert@0: c = md5_gg(c, d, a, b, x[i+ 7], 14, 1735328473); robert@0: b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734); robert@0: robert@0: a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558); robert@0: d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463); robert@0: c = md5_hh(c, d, a, b, x[i+11], 16, 1839030562); robert@0: b = md5_hh(b, c, d, a, x[i+14], 23, -35309556); robert@0: a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060); robert@0: d = md5_hh(d, a, b, c, x[i+ 4], 11, 1272893353); robert@0: c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632); robert@0: b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640); robert@0: a = md5_hh(a, b, c, d, x[i+13], 4 , 681279174); robert@0: d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222); robert@0: c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979); robert@0: b = md5_hh(b, c, d, a, x[i+ 6], 23, 76029189); robert@0: a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487); robert@0: d = md5_hh(d, a, b, c, x[i+12], 11, -421815835); robert@0: c = md5_hh(c, d, a, b, x[i+15], 16, 530742520); robert@0: b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651); robert@0: robert@0: a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844); robert@0: d = md5_ii(d, a, b, c, x[i+ 7], 10, 1126891415); robert@0: c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905); robert@0: b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055); robert@0: a = md5_ii(a, b, c, d, x[i+12], 6 , 1700485571); robert@0: d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606); robert@0: c = md5_ii(c, d, a, b, x[i+10], 15, -1051523); robert@0: b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799); robert@0: a = md5_ii(a, b, c, d, x[i+ 8], 6 , 1873313359); robert@0: d = md5_ii(d, a, b, c, x[i+15], 10, -30611744); robert@0: c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380); robert@0: b = md5_ii(b, c, d, a, x[i+13], 21, 1309151649); robert@0: a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070); robert@0: d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379); robert@0: c = md5_ii(c, d, a, b, x[i+ 2], 15, 718787259); robert@0: b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551); robert@0: robert@0: a = safe_add(a, olda); robert@0: b = safe_add(b, oldb); robert@0: c = safe_add(c, oldc); robert@0: d = safe_add(d, oldd); robert@0: } robert@0: return Array(a, b, c, d); robert@0: robert@0: } robert@0: robert@0: /* robert@0: * These functions implement the four basic operations the algorithm uses. robert@0: */ robert@0: function md5_cmn(q, a, b, x, s, t) robert@0: { robert@0: return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b); robert@0: } robert@0: function md5_ff(a, b, c, d, x, s, t) robert@0: { robert@0: return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t); robert@0: } robert@0: function md5_gg(a, b, c, d, x, s, t) robert@0: { robert@0: return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t); robert@0: } robert@0: function md5_hh(a, b, c, d, x, s, t) robert@0: { robert@0: return md5_cmn(b ^ c ^ d, a, b, x, s, t); robert@0: } robert@0: function md5_ii(a, b, c, d, x, s, t) robert@0: { robert@0: return md5_cmn(c ^ (b | (~d)), a, b, x, s, t); robert@0: } robert@0: robert@0: /* robert@0: * Calculate the HMAC-MD5, of a key and some data robert@0: */ robert@0: function core_hmac_md5(key, data) robert@0: { robert@0: var bkey = str2binl(key); robert@0: if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz); robert@0: robert@0: var ipad = Array(16), opad = Array(16); robert@0: for(var i = 0; i < 16; i++) robert@0: { robert@0: ipad[i] = bkey[i] ^ 0x36363636; robert@0: opad[i] = bkey[i] ^ 0x5C5C5C5C; robert@0: } robert@0: robert@0: var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz); robert@0: return core_md5(opad.concat(hash), 512 + 128); robert@0: } robert@0: robert@0: /* robert@0: * Add integers, wrapping at 2^32. This uses 16-bit operations internally robert@0: * to work around bugs in some JS interpreters. robert@0: */ robert@0: function safe_add(x, y) robert@0: { robert@0: var lsw = (x & 0xFFFF) + (y & 0xFFFF); robert@0: var msw = (x >> 16) + (y >> 16) + (lsw >> 16); robert@0: return (msw << 16) | (lsw & 0xFFFF); robert@0: } robert@0: robert@0: /* robert@0: * Bitwise rotate a 32-bit number to the left. robert@0: */ robert@0: function bit_rol(num, cnt) robert@0: { robert@0: return (num << cnt) | (num >>> (32 - cnt)); robert@0: } robert@0: robert@0: /* robert@0: * Convert a string to an array of little-endian words robert@0: * If chrsz is ASCII, characters >255 have their hi-byte silently ignored. robert@0: */ robert@0: function str2binl(str) robert@0: { robert@0: var bin = Array(); robert@0: var mask = (1 << chrsz) - 1; robert@0: for(var i = 0; i < str.length * chrsz; i += chrsz) robert@0: bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32); robert@0: return bin; robert@0: } robert@0: robert@0: /* robert@0: * Convert an array of little-endian words to a string robert@0: */ robert@0: function binl2str(bin) robert@0: { robert@0: var str = ""; robert@0: var mask = (1 << chrsz) - 1; robert@0: for(var i = 0; i < bin.length * 32; i += chrsz) robert@0: str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask); robert@0: return str; robert@0: } robert@0: robert@0: /* robert@0: * Convert an array of little-endian words to a hex string. robert@0: */ robert@0: function binl2hex(binarray) robert@0: { robert@0: var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef"; robert@0: var str = ""; robert@0: for(var i = 0; i < binarray.length * 4; i++) robert@0: { robert@0: str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) + robert@0: hex_tab.charAt((binarray[i>>2] >> ((i%4)*8 )) & 0xF); robert@0: } robert@0: return str; robert@0: } robert@0: robert@0: /* robert@0: * Convert an array of little-endian words to a base-64 string robert@0: */ robert@0: function binl2b64(binarray) robert@0: { robert@0: var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; robert@0: var str = ""; robert@0: for(var i = 0; i < binarray.length * 4; i += 3) robert@0: { robert@0: var triplet = (((binarray[i >> 2] >> 8 * ( i %4)) & 0xFF) << 16) robert@0: | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 ) robert@0: | ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF); robert@0: for(var j = 0; j < 4; j++) robert@0: { robert@0: if(i * 8 + j * 6 > binarray.length * 32) str += b64pad; robert@0: else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F); robert@0: } robert@0: } robert@0: return str; robert@0: }