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220 lines
7.2 KiB
220 lines
7.2 KiB
/* |
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* A JavaScript implementation of the RSA Data Security, Inc. MD5 Message |
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* Digest Algorithm, as defined in RFC 1321. |
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* Version 1.1 Copyright (C) Paul Johnston 1999 - 2002. |
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* Code also contributed by Greg Holt |
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* See http://pajhome.org.uk/site/legal.html for details. |
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*/ |
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|
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/* |
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* Add integers, wrapping at 2^32. This uses 16-bit operations internally |
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* to work around bugs in some JS interpreters. |
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*/ |
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function safe_add(x, y) |
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{ |
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var lsw = (x & 0xFFFF) + (y & 0xFFFF) |
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var msw = (x >> 16) + (y >> 16) + (lsw >> 16) |
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return (msw << 16) | (lsw & 0xFFFF) |
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} |
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|
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/* |
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* Bitwise rotate a 32-bit number to the left. |
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*/ |
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function rol(num, cnt) |
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{ |
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return (num << cnt) | (num >>> (32 - cnt)) |
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} |
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|
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/* |
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* These functions implement the four basic operations the algorithm uses. |
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*/ |
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function cmn(q, a, b, x, s, t) |
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{ |
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return safe_add(rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b) |
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} |
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function ff(a, b, c, d, x, s, t) |
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{ |
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return cmn((b & c) | ((~b) & d), a, b, x, s, t) |
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} |
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function gg(a, b, c, d, x, s, t) |
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{ |
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return cmn((b & d) | (c & (~d)), a, b, x, s, t) |
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} |
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function hh(a, b, c, d, x, s, t) |
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{ |
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return cmn(b ^ c ^ d, a, b, x, s, t) |
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} |
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function ii(a, b, c, d, x, s, t) |
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{ |
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return cmn(c ^ (b | (~d)), a, b, x, s, t) |
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} |
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/* |
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* Calculate the MD5 of an array of little-endian words, producing an array |
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* of little-endian words. |
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*/ |
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function coreMD5(x) |
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{ |
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var a = 1732584193 |
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var b = -271733879 |
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var c = -1732584194 |
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var d = 271733878 |
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for(var i = 0; i < x.length; i += 16) |
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{ |
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var olda = a |
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var oldb = b |
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var oldc = c |
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var oldd = d |
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a = ff(a, b, c, d, x[i+ 0], 7 , -680876936) |
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d = ff(d, a, b, c, x[i+ 1], 12, -389564586) |
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c = ff(c, d, a, b, x[i+ 2], 17, 606105819) |
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b = ff(b, c, d, a, x[i+ 3], 22, -1044525330) |
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a = ff(a, b, c, d, x[i+ 4], 7 , -176418897) |
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d = ff(d, a, b, c, x[i+ 5], 12, 1200080426) |
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c = ff(c, d, a, b, x[i+ 6], 17, -1473231341) |
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b = ff(b, c, d, a, x[i+ 7], 22, -45705983) |
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a = ff(a, b, c, d, x[i+ 8], 7 , 1770035416) |
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d = ff(d, a, b, c, x[i+ 9], 12, -1958414417) |
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c = ff(c, d, a, b, x[i+10], 17, -42063) |
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b = ff(b, c, d, a, x[i+11], 22, -1990404162) |
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a = ff(a, b, c, d, x[i+12], 7 , 1804603682) |
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d = ff(d, a, b, c, x[i+13], 12, -40341101) |
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c = ff(c, d, a, b, x[i+14], 17, -1502002290) |
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b = ff(b, c, d, a, x[i+15], 22, 1236535329) |
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a = gg(a, b, c, d, x[i+ 1], 5 , -165796510) |
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d = gg(d, a, b, c, x[i+ 6], 9 , -1069501632) |
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c = gg(c, d, a, b, x[i+11], 14, 643717713) |
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b = gg(b, c, d, a, x[i+ 0], 20, -373897302) |
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a = gg(a, b, c, d, x[i+ 5], 5 , -701558691) |
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d = gg(d, a, b, c, x[i+10], 9 , 38016083) |
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c = gg(c, d, a, b, x[i+15], 14, -660478335) |
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b = gg(b, c, d, a, x[i+ 4], 20, -405537848) |
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a = gg(a, b, c, d, x[i+ 9], 5 , 568446438) |
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d = gg(d, a, b, c, x[i+14], 9 , -1019803690) |
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c = gg(c, d, a, b, x[i+ 3], 14, -187363961) |
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b = gg(b, c, d, a, x[i+ 8], 20, 1163531501) |
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a = gg(a, b, c, d, x[i+13], 5 , -1444681467) |
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d = gg(d, a, b, c, x[i+ 2], 9 , -51403784) |
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c = gg(c, d, a, b, x[i+ 7], 14, 1735328473) |
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b = gg(b, c, d, a, x[i+12], 20, -1926607734) |
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a = hh(a, b, c, d, x[i+ 5], 4 , -378558) |
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d = hh(d, a, b, c, x[i+ 8], 11, -2022574463) |
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c = hh(c, d, a, b, x[i+11], 16, 1839030562) |
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b = hh(b, c, d, a, x[i+14], 23, -35309556) |
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a = hh(a, b, c, d, x[i+ 1], 4 , -1530992060) |
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d = hh(d, a, b, c, x[i+ 4], 11, 1272893353) |
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c = hh(c, d, a, b, x[i+ 7], 16, -155497632) |
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b = hh(b, c, d, a, x[i+10], 23, -1094730640) |
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a = hh(a, b, c, d, x[i+13], 4 , 681279174) |
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d = hh(d, a, b, c, x[i+ 0], 11, -358537222) |
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c = hh(c, d, a, b, x[i+ 3], 16, -722521979) |
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b = hh(b, c, d, a, x[i+ 6], 23, 76029189) |
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a = hh(a, b, c, d, x[i+ 9], 4 , -640364487) |
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d = hh(d, a, b, c, x[i+12], 11, -421815835) |
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c = hh(c, d, a, b, x[i+15], 16, 530742520) |
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b = hh(b, c, d, a, x[i+ 2], 23, -995338651) |
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a = ii(a, b, c, d, x[i+ 0], 6 , -198630844) |
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d = ii(d, a, b, c, x[i+ 7], 10, 1126891415) |
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c = ii(c, d, a, b, x[i+14], 15, -1416354905) |
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b = ii(b, c, d, a, x[i+ 5], 21, -57434055) |
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a = ii(a, b, c, d, x[i+12], 6 , 1700485571) |
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d = ii(d, a, b, c, x[i+ 3], 10, -1894986606) |
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c = ii(c, d, a, b, x[i+10], 15, -1051523) |
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b = ii(b, c, d, a, x[i+ 1], 21, -2054922799) |
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a = ii(a, b, c, d, x[i+ 8], 6 , 1873313359) |
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d = ii(d, a, b, c, x[i+15], 10, -30611744) |
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c = ii(c, d, a, b, x[i+ 6], 15, -1560198380) |
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b = ii(b, c, d, a, x[i+13], 21, 1309151649) |
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a = ii(a, b, c, d, x[i+ 4], 6 , -145523070) |
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d = ii(d, a, b, c, x[i+11], 10, -1120210379) |
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c = ii(c, d, a, b, x[i+ 2], 15, 718787259) |
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b = ii(b, c, d, a, x[i+ 9], 21, -343485551) |
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a = safe_add(a, olda) |
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b = safe_add(b, oldb) |
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c = safe_add(c, oldc) |
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d = safe_add(d, oldd) |
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} |
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return [a, b, c, d] |
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} |
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/* |
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* Convert an array of little-endian words to a hex string. |
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*/ |
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function binl2hex(binarray) |
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{ |
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var hex_tab = "0123456789abcdef" |
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var str = "" |
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for(var i = 0; i < binarray.length * 4; i++) |
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{ |
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str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) + |
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hex_tab.charAt((binarray[i>>2] >> ((i%4)*8)) & 0xF) |
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} |
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return str |
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} |
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/* |
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* Convert an array of little-endian words to a base64 encoded string. |
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*/ |
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function binl2b64(binarray) |
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{ |
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var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" |
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var str = "" |
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for(var i = 0; i < binarray.length * 32; i += 6) |
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{ |
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str += tab.charAt(((binarray[i>>5] << (i%32)) & 0x3F) | |
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((binarray[i>>5+1] >> (32-i%32)) & 0x3F)) |
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} |
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return str |
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} |
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/* |
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* Convert an 8-bit character string to a sequence of 16-word blocks, stored |
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* as an array, and append appropriate padding for MD4/5 calculation. |
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* If any of the characters are >255, the high byte is silently ignored. |
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*/ |
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function str2binl(str) |
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{ |
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var nblk = ((str.length + 8) >> 6) + 1 // number of 16-word blocks |
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var blks = new Array(nblk * 16) |
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for(var i = 0; i < nblk * 16; i++) blks[i] = 0 |
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for(var i = 0; i < str.length; i++) |
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blks[i>>2] |= (str.charCodeAt(i) & 0xFF) << ((i%4) * 8) |
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blks[i>>2] |= 0x80 << ((i%4) * 8) |
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blks[nblk*16-2] = str.length * 8 |
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return blks |
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} |
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/* |
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* Convert a wide-character string to a sequence of 16-word blocks, stored as |
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* an array, and append appropriate padding for MD4/5 calculation. |
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*/ |
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function strw2binl(str) |
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{ |
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var nblk = ((str.length + 4) >> 5) + 1 // number of 16-word blocks |
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var blks = new Array(nblk * 16) |
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for(var i = 0; i < nblk * 16; i++) blks[i] = 0 |
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for(var i = 0; i < str.length; i++) |
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blks[i>>1] |= str.charCodeAt(i) << ((i%2) * 16) |
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blks[i>>1] |= 0x80 << ((i%2) * 16) |
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blks[nblk*16-2] = str.length * 16 |
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return blks |
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} |
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/* |
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* External interface |
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*/ |
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function hexMD5 (str) { return binl2hex(coreMD5( str2binl(str))) } |
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function hexMD5w(str) { return binl2hex(coreMD5(strw2binl(str))) } |
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function b64MD5 (str) { return binl2b64(coreMD5( str2binl(str))) } |
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function b64MD5w(str) { return binl2b64(coreMD5(strw2binl(str))) } |
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/* Backward compatibility */ |
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function calcMD5(str) { return binl2hex(coreMD5( str2binl(str))) } |
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export { |
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hexMD5 |
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} |