diff --git a/Hashes/MD5.js b/Hashes/MD5.js new file mode 100644 index 0000000000..46433488a2 --- /dev/null +++ b/Hashes/MD5.js @@ -0,0 +1,202 @@ +//= =============================================================== +// MD5.js +// +// Module that replicates the MD5 message-digest algorithm +// function in Javascript. +//= =============================================================== + + +function md5cycle(x, k) { + var 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) { + txt = ""; + var 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); + var 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; +} + +/* there needs to be support for Unicode here, + * unless we pretend that we can redefine the MD-5 + * algorithm for multi-byte characters (perhaps + * by adding every four 16-bit characters and + * shortening the sum to 32 bits). Otherwise + * I suggest performing MD-5 as if every character + * was two bytes--e.g., 0040 0025 = @%--but then + * how will an ordinary MD-5 sum be matched? + * There is no way to standardize text to something + * like UTF-8 before transformation; speed cost is + * utterly prohibitive. The JavaScript standard + * itself needs to look at this: it should start + * providing access to strings as preformed UTF-8 + * 8-bit unsigned value arrays. + */ +function md5blk(s) { + /* I figured global was faster. */ + var 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; +} + +var hex_chr = "0123456789abcdef".split(""); + +function rhex(n) { + var 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 (var i = 0; i < x.length; i++) x[i] = rhex(x[i]); + return x.join(""); +} + +function md5(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; +} + +if (md5("hello") != "5d41402abc4b2a76b9719d911017c592") { + function add32d(x, y) { + var lsw = (x & 0xffff) + (y & 0xffff), + msw = (x>> 16) + (y>> 16) + (lsw>> 16); + return (msw << 16) | (lsw & 0xffff); + } +} + +// testing +console.log(md5("test")) + +// export MD5 function +module.exports = md5

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