javascript 的MD5代码备份，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(); 

    }