jQuery MD5插件
原文链接：http://www.cnblogs.com/sntetwt/p/3767740.html
1 /** 2 * jQuery MD5 hash algorithm function 3 * 4 * <code> 5 * Calculate the md5 hash of a String 6 * String $.md5 ( String str ) 7 * </code> 8 * 9 * Calculates the MD5 hash of str using the » RSA Data Security, Inc. MD5 Message-Digest Algorithm, and returns that hash. 10 * MD5 (Message-Digest algorithm 5) is a widely-used cryptographic hash function with a 128-bit hash value. MD5 has been employed in a wide variety of security applications, and is also commonly used to check the integrity of data. The generated hash is also non-reversable. Data cannot be retrieved from the message digest, the digest uniquely identifies the data. 11 * MD5 was developed by Professor Ronald L. Rivest in 1994. Its 128 bit (16 byte) message digest makes it a faster implementation than SHA-1. 12 * This script is used to process a variable length message into a fixed-length output of 128 bits using the MD5 algorithm. It is fully compatible with UTF-8 encoding. It is very useful when u want to transfer encrypted passwords over the internet. If you plan using UTF-8 encoding in your project don't forget to set the page encoding to UTF-8 (Content-Type meta tag). 13 * This function orginally get from the WebToolkit and rewrite for using as the jQuery plugin. 14 * 15 * Example 16 * Code 17 * <code> 18 * $.md5("I'm Persian."); 19 * </code> 20 * Result 21 * <code> 22 * "b8c901d0f02223f9761016cfff9d68df" 23 * </code> 24 * 25 * @alias Muhammad Hussein Fattahizadeh < muhammad [AT] semnanweb [DOT] com > 26 * @link http://www.semnanweb.com/jquery-plugin/md5.html 27 * @see http://www.webtoolkit.info/ 28 * @license http://www.gnu.org/licenses/gpl.html [GNU General Public License] 29 * @param {jQuery} {md5:function(string)) 30 * @return string 31 */ 32 33 (function($){ 34 35 var rotateLeft = function(lValue, iShiftBits) { 36 return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits)); 37 } 38 39 var addUnsigned = function(lX, lY) { 40 var lX4, lY4, lX8, lY8, lResult; 41 lX8 = (lX & 0x80000000); 42 lY8 = (lY & 0x80000000); 43 lX4 = (lX & 0x40000000); 44 lY4 = (lY & 0x40000000); 45 lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF); 46 if (lX4 & lY4) return (lResult ^ 0x80000000 ^ lX8 ^ lY8); 47 if (lX4 | lY4) { 48 if (lResult & 0x40000000) return (lResult ^ 0xC0000000 ^ lX8 ^ lY8); 49 else return (lResult ^ 0x40000000 ^ lX8 ^ lY8); 50 } else { 51 return (lResult ^ lX8 ^ lY8); 52 } 53 } 54 55 var F = function(x, y, z) { 56 return (x & y) | ((~ x) & z); 57 } 58 59 var G = function(x, y, z) { 60 return (x & z) | (y & (~ z)); 61 } 62 63 var H = function(x, y, z) { 64 return (x ^ y ^ z); 65 } 66 67 var I = function(x, y, z) { 68 return (y ^ (x | (~ z))); 69 } 70 71 var FF = function(a, b, c, d, x, s, ac) { 72 a = addUnsigned(a, addUnsigned(addUnsigned(F(b, c, d), x), ac)); 73 return addUnsigned(rotateLeft(a, s), b); 74 }; 75 76 var GG = function(a, b, c, d, x, s, ac) { 77 a = addUnsigned(a, addUnsigned(addUnsigned(G(b, c, d), x), ac)); 78 return addUnsigned(rotateLeft(a, s), b); 79 }; 80 81 var HH = function(a, b, c, d, x, s, ac) { 82 a = addUnsigned(a, addUnsigned(addUnsigned(H(b, c, d), x), ac)); 83 return addUnsigned(rotateLeft(a, s), b); 84 }; 85 86 var II = function(a, b, c, d, x, s, ac) { 87 a = addUnsigned(a, addUnsigned(addUnsigned(I(b, c, d), x), ac)); 88 return addUnsigned(rotateLeft(a, s), b); 89 }; 90 91 var convertToWordArray = function(string) { 92 var lWordCount; 93 var lMessageLength = string.length; 94 var lNumberOfWordsTempOne = lMessageLength + 8; 95 var lNumberOfWordsTempTwo = (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % 64)) / 64; 96 var lNumberOfWords = (lNumberOfWordsTempTwo + 1) * 16; 97 var lWordArray = Array(lNumberOfWords - 1); 98 var lBytePosition = 0; 99 var lByteCount = 0; 100 while (lByteCount < lMessageLength) { 101 lWordCount = (lByteCount - (lByteCount % 4)) / 4; 102 lBytePosition = (lByteCount % 4) * 8; 103 lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition)); 104 lByteCount++; 105 } 106 lWordCount = (lByteCount - (lByteCount % 4)) / 4; 107 lBytePosition = (lByteCount % 4) * 8; 108 lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition); 109 lWordArray[lNumberOfWords - 2] = lMessageLength << 3; 110 lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29; 111 return lWordArray; 112 }; 113 114 var wordToHex = function(lValue) { 115 var WordToHexValue = "", WordToHexValueTemp = "", lByte, lCount; 116 for (lCount = 0; lCount <= 3; lCount++) { 117 lByte = (lValue >>> (lCount * 8)) & 255; 118 WordToHexValueTemp = "0" + lByte.toString(16); 119 WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2); 120 } 121 return WordToHexValue; 122 }; 123 124 var uTF8Encode = function(string) { 125 string = string.replace(/\x0d\x0a/g, "\x0a"); 126 var output = ""; 127 for (var n = 0; n < string.length; n++) { 128 var c = string.charCodeAt(n); 129 if (c < 128) { 130 output += String.fromCharCode(c); 131 } else if ((c > 127) && (c < 2048)) { 132 output += String.fromCharCode((c >> 6) | 192); 133 output += String.fromCharCode((c & 63) | 128); 134 } else { 135 output += String.fromCharCode((c >> 12) | 224); 136 output += String.fromCharCode(((c >> 6) & 63) | 128); 137 output += String.fromCharCode((c & 63) | 128); 138 } 139 } 140 return output; 141 }; 142 143 $.extend({ 144 md5: function(string) { 145 var x = Array(); 146 var k, AA, BB, CC, DD, a, b, c, d; 147 var S11=7, S12=12, S13=17, S14=22; 148 var S21=5, S22=9 , S23=14, S24=20; 149 var S31=4, S32=11, S33=16, S34=23; 150 var S41=6, S42=10, S43=15, S44=21; 151 string = uTF8Encode(string); 152 x = convertToWordArray(string); 153 a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476; 154 for (k = 0; k < x.length; k += 16) { 155 AA = a; BB = b; CC = c; DD = d; 156 a = FF(a, b, c, d, x[k+0], S11, 0xD76AA478); 157 d = FF(d, a, b, c, x[k+1], S12, 0xE8C7B756); 158 c = FF(c, d, a, b, x[k+2], S13, 0x242070DB); 159 b = FF(b, c, d, a, x[k+3], S14, 0xC1BDCEEE); 160 a = FF(a, b, c, d, x[k+4], S11, 0xF57C0FAF); 161 d = FF(d, a, b, c, x[k+5], S12, 0x4787C62A); 162 c = FF(c, d, a, b, x[k+6], S13, 0xA8304613); 163 b = FF(b, c, d, a, x[k+7], S14, 0xFD469501); 164 a = FF(a, b, c, d, x[k+8], S11, 0x698098D8); 165 d = FF(d, a, b, c, x[k+9], S12, 0x8B44F7AF); 166 c = FF(c, d, a, b, x[k+10], S13, 0xFFFF5BB1); 167 b = FF(b, c, d, a, x[k+11], S14, 0x895CD7BE); 168 a = FF(a, b, c, d, x[k+12], S11, 0x6B901122); 169 d = FF(d, a, b, c, x[k+13], S12, 0xFD987193); 170 c = FF(c, d, a, b, x[k+14], S13, 0xA679438E); 171 b = FF(b, c, d, a, x[k+15], S14, 0x49B40821); 172 a = GG(a, b, c, d, x[k+1], S21, 0xF61E2562); 173 d = GG(d, a, b, c, x[k+6], S22, 0xC040B340); 174 c = GG(c, d, a, b, x[k+11], S23, 0x265E5A51); 175 b = GG(b, c, d, a, x[k+0], S24, 0xE9B6C7AA); 176 a = GG(a, b, c, d, x[k+5], S21, 0xD62F105D); 177 d = GG(d, a, b, c, x[k+10], S22, 0x2441453); 178 c = GG(c, d, a, b, x[k+15], S23, 0xD8A1E681); 179 b = GG(b, c, d, a, x[k+4], S24, 0xE7D3FBC8); 180 a = GG(a, b, c, d, x[k+9], S21, 0x21E1CDE6); 181 d = GG(d, a, b, c, x[k+14], S22, 0xC33707D6); 182 c = GG(c, d, a, b, x[k+3], S23, 0xF4D50D87); 183 b = GG(b, c, d, a, x[k+8], S24, 0x455A14ED); 184 a = GG(a, b, c, d, x[k+13], S21, 0xA9E3E905); 185 d = GG(d, a, b, c, x[k+2], S22, 0xFCEFA3F8); 186 c = GG(c, d, a, b, x[k+7], S23, 0x676F02D9); 187 b = GG(b, c, d, a, x[k+12], S24, 0x8D2A4C8A); 188 a = HH(a, b, c, d, x[k+5], S31, 0xFFFA3942); 189 d = HH(d, a, b, c, x[k+8], S32, 0x8771F681); 190 c = HH(c, d, a, b, x[k+11], S33, 0x6D9D6122); 191 b = HH(b, c, d, a, x[k+14], S34, 0xFDE5380C); 192 a = HH(a, b, c, d, x[k+1], S31, 0xA4BEEA44); 193 d = HH(d, a, b, c, x[k+4], S32, 0x4BDECFA9); 194 c = HH(c, d, a, b, x[k+7], S33, 0xF6BB4B60); 195 b = HH(b, c, d, a, x[k+10], S34, 0xBEBFBC70); 196 a = HH(a, b, c, d, x[k+13], S31, 0x289B7EC6); 197 d = HH(d, a, b, c, x[k+0], S32, 0xEAA127FA); 198 c = HH(c, d, a, b, x[k+3], S33, 0xD4EF3085); 199 b = HH(b, c, d, a, x[k+6], S34, 0x4881D05); 200 a = HH(a, b, c, d, x[k+9], S31, 0xD9D4D039); 201 d = HH(d, a, b, c, x[k+12], S32, 0xE6DB99E5); 202 c = HH(c, d, a, b, x[k+15], S33, 0x1FA27CF8); 203 b = HH(b, c, d, a, x[k+2], S34, 0xC4AC5665); 204 a = II(a, b, c, d, x[k+0], S41, 0xF4292244); 205 d = II(d, a, b, c, x[k+7], S42, 0x432AFF97); 206 c = II(c, d, a, b, x[k+14], S43, 0xAB9423A7); 207 b = II(b, c, d, a, x[k+5], S44, 0xFC93A039); 208 a = II(a, b, c, d, x[k+12], S41, 0x655B59C3); 209 d = II(d, a, b, c, x[k+3], S42, 0x8F0CCC92); 210 c = II(c, d, a, b, x[k+10], S43, 0xFFEFF47D); 211 b = II(b, c, d, a, x[k+1], S44, 0x85845DD1); 212 a = II(a, b, c, d, x[k+8], S41, 0x6FA87E4F); 213 d = II(d, a, b, c, x[k+15], S42, 0xFE2CE6E0); 214 c = II(c, d, a, b, x[k+6], S43, 0xA3014314); 215 b = II(b, c, d, a, x[k+13], S44, 0x4E0811A1); 216 a = II(a, b, c, d, x[k+4], S41, 0xF7537E82); 217 d = II(d, a, b, c, x[k+11], S42, 0xBD3AF235); 218 c = II(c, d, a, b, x[k+2], S43, 0x2AD7D2BB); 219 b = II(b, c, d, a, x[k+9], S44, 0xEB86D391); 220 a = addUnsigned(a, AA); 221 b = addUnsigned(b, BB); 222 c = addUnsigned(c, CC); 223 d = addUnsigned(d, DD); 224 } 225 var tempValue = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d); 226 return tempValue.toLowerCase(); 227 } 228 }); 229 })(jQuery);
