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/** * Copyright (c) 2014 Meizu bigertech, All rights reserved. * http://www.bigertech.com/
* @author liuxing * @date 14-12-1 * @description * */
/* * Add integers, wrapping at 2^32. This uses 16-bit operations internally * to work around bugs in some JS interpreters. */function safe_add(x, y) { var lsw = (x & 0xFFFF) + (y & 0xFFFF), msw = (x >> 16) + (y >> 16) + (lsw >> 16); return (msw << 16) | (lsw & 0xFFFF);}
/* * Bitwise rotate a 32-bit number to the left. */function bit_rol(num, cnt) { return (num << cnt) | (num >>> (32 - cnt));}
/* * These functions implement the four basic operations the algorithm uses. */function md5_cmn(q, a, b, x, s, t) { return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);}function md5_ff(a, b, c, d, x, s, t) { return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);}function md5_gg(a, b, c, d, x, s, t) { return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);}function md5_hh(a, b, c, d, x, s, t) { return md5_cmn(b ^ c ^ d, a, b, x, s, t);}function md5_ii(a, b, c, d, x, s, t) { return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);}
/* * Calculate the MD5 of an array of little-endian words, and a bit length. */function binl_md5(x, len) { /* append padding */ x[len >> 5] |= 0x80 << (len % 32); x[(((len + 64) >>> 9) << 4) + 14] = len;
var i, olda, oldb, oldc, oldd, a = 1732584193, b = -271733879, c = -1732584194, d = 271733878;
for (i = 0; i < x.length; i += 16) { olda = a; oldb = b; oldc = c; oldd = d;
a = md5_ff(a, b, c, d, x[i], 7, -680876936); d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586); c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819); b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330); a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897); d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426); c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341); b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983); a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416); d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417); c = md5_ff(c, d, a, b, x[i + 10], 17, -42063); b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162); a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682); d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101); c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290); b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510); d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632); c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713); b = md5_gg(b, c, d, a, x[i], 20, -373897302); a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691); d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083); c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335); b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848); a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438); d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690); c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961); b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501); a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467); d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784); c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473); b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
a = md5_hh(a, b, c, d, x[i + 5], 4, -378558); d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463); c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562); b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556); a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060); d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353); c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632); b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640); a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174); d = md5_hh(d, a, b, c, x[i], 11, -358537222); c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979); b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189); a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487); d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835); c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520); b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
a = md5_ii(a, b, c, d, x[i], 6, -198630844); d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415); c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905); b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055); a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571); d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606); c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523); b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799); a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359); d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744); c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380); b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649); a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070); d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379); c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259); b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
a = safe_add(a, olda); b = safe_add(b, oldb); c = safe_add(c, oldc); d = safe_add(d, oldd); } return [a, b, c, d];}
/* * Convert an array of little-endian words to a string */function binl2rstr(input) { var i, output = ''; for (i = 0; i < input.length * 32; i += 8) { output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF); } return output;}
/* * Convert a raw string to an array of little-endian words * Characters >255 have their high-byte silently ignored. */function rstr2binl(input) { var i, output = []; output[(input.length >> 2) - 1] = undefined; for (i = 0; i < output.length; i += 1) { output[i] = 0; } for (i = 0; i < input.length * 8; i += 8) { output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (i % 32); } return output;}
/* * Calculate the MD5 of a raw string */function rstr_md5(s) { return binl2rstr(binl_md5(rstr2binl(s), s.length * 8));}
/* * Calculate the HMAC-MD5, of a key and some data (raw strings) */function rstr_hmac_md5(key, data) { var i, bkey = rstr2binl(key), ipad = [], opad = [], hash; ipad[15] = opad[15] = undefined; if (bkey.length > 16) { bkey = binl_md5(bkey, key.length * 8); } for (i = 0; i < 16; i += 1) { ipad[i] = bkey[i] ^ 0x36363636; opad[i] = bkey[i] ^ 0x5C5C5C5C; } hash = binl_md5(ipad.concat(rstr2binl(data)), 512 + data.length * 8); return binl2rstr(binl_md5(opad.concat(hash), 512 + 128));}
/* * Convert a raw string to a hex string */function rstr2hex(input) { var hex_tab = '0123456789abcdef', output = '', x, i; for (i = 0; i < input.length; i += 1) { x = input.charCodeAt(i); output += hex_tab.charAt((x >>> 4) & 0x0F) + hex_tab.charAt(x & 0x0F); } return output;}
/* * Encode a string as utf-8 */function str2rstr_utf8(input) { return unescape(encodeURIComponent(input));}
/* * Take string arguments and return either raw or hex encoded strings */function raw_md5(s) { return rstr_md5(str2rstr_utf8(s));}function hex_md5(s) { return rstr2hex(raw_md5(s));}function raw_hmac_md5(k, d) { return rstr_hmac_md5(str2rstr_utf8(k), str2rstr_utf8(d));}function hex_hmac_md5(k, d) { return rstr2hex(raw_hmac_md5(k, d));}
function md5(string, key, raw) { if (!key) { if (!raw) { return hex_md5(string); } return raw_md5(string); } if (!raw) { return hex_hmac_md5(key, string); } return raw_hmac_md5(key, string);}module.exports = md5;
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