JavaScript实现的MD5算法完整实例

/**** MD5 (Message-Digest Algorithm)* http://www.webtoolkit.info/***/var MD5 = function (string) { function RotateLeft(lValue, iShiftBits) {  return (lValue<<iShiftBits) | (lValue>>>(32-iShiftBits)); } function AddUnsigned(lX,lY) {  var lX4,lY4,lX8,lY8,lResult;  lX8 = (lX & 0x80000000);  lY8 = (lY & 0x80000000);  lX4 = (lX & 0x40000000);  lY4 = (lY & 0x40000000);  lResult = (lX & 0x3FFFFFFF)+(lY & 0x3FFFFFFF);  if (lX4 & lY4) {   return (lResult ^ 0x80000000 ^ lX8 ^ lY8);  }  if (lX4 | lY4) {   if (lResult & 0x40000000) {    return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);   } else {    return (lResult ^ 0x40000000 ^ lX8 ^ lY8);   }  } else {   return (lResult ^ lX8 ^ lY8);  }  }  function F(x,y,z) { return (x & y) | ((~x) & z); }  function G(x,y,z) { return (x & z) | (y & (~z)); }  function H(x,y,z) { return (x ^ y ^ z); } function I(x,y,z) { return (y ^ (x | (~z))); } function FF(a,b,c,d,x,s,ac) {  a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac));  return AddUnsigned(RotateLeft(a, s), b); }; function GG(a,b,c,d,x,s,ac) {  a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac));  return AddUnsigned(RotateLeft(a, s), b); }; function HH(a,b,c,d,x,s,ac) {  a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac));  return AddUnsigned(RotateLeft(a, s), b); }; function II(a,b,c,d,x,s,ac) {  a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac));  return AddUnsigned(RotateLeft(a, s), b); }; function ConvertToWordArray(string) {  var lWordCount;  var lMessageLength = string.length;  var lNumberOfWords_temp1=lMessageLength + 8;  var lNumberOfWords_temp2=(lNumberOfWords_temp1-(lNumberOfWords_temp1 % 64))/64;  var lNumberOfWords = (lNumberOfWords_temp2+1)*16;  var lWordArray=Array(lNumberOfWords-1);  var lBytePosition = 0;  var lByteCount = 0;  while ( lByteCount < lMessageLength ) {   lWordCount = (lByteCount-(lByteCount % 4))/4;   lBytePosition = (lByteCount % 4)*8;   lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount)<<lBytePosition));   lByteCount++;  }  lWordCount = (lByteCount-(lByteCount % 4))/4;  lBytePosition = (lByteCount % 4)*8;  lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80<<lBytePosition);  lWordArray[lNumberOfWords-2] = lMessageLength<<3;  lWordArray[lNumberOfWords-1] = lMessageLength>>>29;  return lWordArray; }; function WordToHex(lValue) {  var WordToHexValue="",WordToHexValue_temp="",lByte,lCount;  for (lCount = 0;lCount<=3;lCount++) {   lByte = (lValue>>>(lCount*8)) & 255;   WordToHexValue_temp = "0" + lByte.toString(16);   WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length-2,2);  }  return WordToHexValue; }; function Utf8Encode(string) {  string = string.replace(//r/n/g,"/n");  var utftext = "";  for (var n = 0; n < string.length; n++) {   var c = string.charCodeAt(n);   if (c < 128) {    utftext += String.fromCharCode(c);   }   else if((c > 127) && (c < 2048)) {    utftext += String.fromCharCode((c >> 6) | 192);    utftext += String.fromCharCode((c & 63) | 128);   }   else {    utftext += String.fromCharCode((c >> 12) | 224);    utftext += String.fromCharCode(((c >> 6) & 63) | 128);    utftext += String.fromCharCode((c & 63) | 128);   }  }  return utftext; }; var x=Array(); var k,AA,BB,CC,DD,a,b,c,d; var S11=7, S12=12, S13=17, S14=22; var S21=5, S22=9 , S23=14, S24=20; var S31=4, S32=11, S33=16, S34=23; var S41=6, S42=10, S43=15, S44=21; string = Utf8Encode(string); x = ConvertToWordArray(string); a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476; for (k=0;k<x.length;k+=16) {  AA=a; BB=b; CC=c; DD=d;  a=FF(a,b,c,d,x[k+0], S11,0xD76AA478);  d=FF(d,a,b,c,x[k+1], S12,0xE8C7B756);  c=FF(c,d,a,b,x[k+2], S13,0x242070DB);  b=FF(b,c,d,a,x[k+3], S14,0xC1BDCEEE);  a=FF(a,b,c,d,x[k+4], S11,0xF57C0FAF);  d=FF(d,a,b,c,x[k+5], S12,0x4787C62A);  c=FF(c,d,a,b,x[k+6], S13,0xA8304613);  b=FF(b,c,d,a,x[k+7], S14,0xFD469501);  a=FF(a,b,c,d,x[k+8], S11,0x698098D8);  d=FF(d,a,b,c,x[k+9], S12,0x8B44F7AF);  c=FF(c,d,a,b,x[k+10],S13,0xFFFF5BB1);  b=FF(b,c,d,a,x[k+11],S14,0x895CD7BE);  a=FF(a,b,c,d,x[k+12],S11,0x6B901122);  d=FF(d,a,b,c,x[k+13],S12,0xFD987193);  c=FF(c,d,a,b,x[k+14],S13,0xA679438E);  b=FF(b,c,d,a,x[k+15],S14,0x49B40821);  a=GG(a,b,c,d,x[k+1], S21,0xF61E2562);  d=GG(d,a,b,c,x[k+6], S22,0xC040B340);  c=GG(c,d,a,b,x[k+11],S23,0x265E5A51);  b=GG(b,c,d,a,x[k+0], S24,0xE9B6C7AA);  a=GG(a,b,c,d,x[k+5], S21,0xD62F105D);  d=GG(d,a,b,c,x[k+10],S22,0x2441453);  c=GG(c,d,a,b,x[k+15],S23,0xD8A1E681);  b=GG(b,c,d,a,x[k+4], S24,0xE7D3FBC8);  a=GG(a,b,c,d,x[k+9], S21,0x21E1CDE6);  d=GG(d,a,b,c,x[k+14],S22,0xC33707D6);  c=GG(c,d,a,b,x[k+3], S23,0xF4D50D87);  b=GG(b,c,d,a,x[k+8], S24,0x455A14ED);  a=GG(a,b,c,d,x[k+13],S21,0xA9E3E905);  d=GG(d,a,b,c,x[k+2], S22,0xFCEFA3F8);  c=GG(c,d,a,b,x[k+7], S23,0x676F02D9);  b=GG(b,c,d,a,x[k+12],S24,0x8D2A4C8A);  a=HH(a,b,c,d,x[k+5], S31,0xFFFA3942);  d=HH(d,a,b,c,x[k+8], S32,0x8771F681);  c=HH(c,d,a,b,x[k+11],S33,0x6D9D6122);  b=HH(b,c,d,a,x[k+14],S34,0xFDE5380C);  a=HH(a,b,c,d,x[k+1], S31,0xA4BEEA44);  d=HH(d,a,b,c,x[k+4], S32,0x4BDECFA9);  c=HH(c,d,a,b,x[k+7], S33,0xF6BB4B60);  b=HH(b,c,d,a,x[k+10],S34,0xBEBFBC70);  a=HH(a,b,c,d,x[k+13],S31,0x289B7EC6);  d=HH(d,a,b,c,x[k+0], S32,0xEAA127FA);  c=HH(c,d,a,b,x[k+3], S33,0xD4EF3085);  b=HH(b,c,d,a,x[k+6], S34,0x4881D05);  a=HH(a,b,c,d,x[k+9], S31,0xD9D4D039);  d=HH(d,a,b,c,x[k+12],S32,0xE6DB99E5);  c=HH(c,d,a,b,x[k+15],S33,0x1FA27CF8);  b=HH(b,c,d,a,x[k+2], S34,0xC4AC5665);  a=II(a,b,c,d,x[k+0], S41,0xF4292244);  d=II(d,a,b,c,x[k+7], S42,0x432AFF97);  c=II(c,d,a,b,x[k+14],S43,0xAB9423A7);  b=II(b,c,d,a,x[k+5], S44,0xFC93A039);  a=II(a,b,c,d,x[k+12],S41,0x655B59C3);  d=II(d,a,b,c,x[k+3], S42,0x8F0CCC92);  c=II(c,d,a,b,x[k+10],S43,0xFFEFF47D);  b=II(b,c,d,a,x[k+1], S44,0x85845DD1);  a=II(a,b,c,d,x[k+8], S41,0x6FA87E4F);  d=II(d,a,b,c,x[k+15],S42,0xFE2CE6E0);  c=II(c,d,a,b,x[k+6], S43,0xA3014314);  b=II(b,c,d,a,x[k+13],S44,0x4E0811A1);  a=II(a,b,c,d,x[k+4], S41,0xF7537E82);  d=II(d,a,b,c,x[k+11],S42,0xBD3AF235);  c=II(c,d,a,b,x[k+2], S43,0x2AD7D2BB);  b=II(b,c,d,a,x[k+9], S44,0xEB86D391);  a=AddUnsigned(a,AA);  b=AddUnsigned(b,BB);  c=AddUnsigned(c,CC);  d=AddUnsigned(d,DD); } var temp = WordToHex(a)+WordToHex(b)+WordToHex(c)+WordToHex(d); return temp.toLowerCase();}