javascript 的MD5代碼備份，跟java互通

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(); 

     }