Javascript的md5加密函数，根据提供的字符串生成对应的md5值.
这个js md5()函数支持utf-8，并且配有使用实例。
可以将js代码保存到md5.js中，在需要的时候调用。注意：md5的生成需要一系列函数，请不要改动以下代码，否则可能导致程序出错，或者无法获取到正确的md5值。
为了保证代码的正确性，请下载附件md5.js (没有实例)，而不要直接复制本页代码。
<script type="text/javascript">
/*
* Javascript md5() 函数 用于生成字符串对应的md5值
* 吴先成 www.51-n.com ohcc@163.com QQ:229256237
* @param string string 原始字符串
* @return string 加密后的32位md5字符串
*/
function md5(string){
function md5_RotateLeft(lValue, iShiftBits) {
return (lValue<<iShiftBits) | (lValue>>>(32-iShiftBits));
}
function md5_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 md5_F(x,y,z){
return (x & y) | ((~x) & z);
}
function md5_G(x,y,z){
return (x & z) | (y & (~z));
}
function md5_H(x,y,z){
return (x ^ y ^ z);
}
function md5_I(x,y,z){
return (y ^ (x | (~z)));
}
function md5_FF(a,b,c,d,x,s,ac){
a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_F(b, c, d), x), ac));
return md5_AddUnsigned(md5_RotateLeft(a, s), b);
};
function md5_GG(a,b,c,d,x,s,ac){
a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_G(b, c, d), x), ac));
return md5_AddUnsigned(md5_RotateLeft(a, s), b);
};
function md5_HH(a,b,c,d,x,s,ac){
a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_H(b, c, d), x), ac));
return md5_AddUnsigned(md5_RotateLeft(a, s), b);
};
function md5_II(a,b,c,d,x,s,ac){
a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_I(b, c, d), x), ac));
return md5_AddUnsigned(md5_RotateLeft(a, s), b);
};
function md5_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 md5_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 md5_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 = md5_Utf8Encode(string);
x = md5_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=md5_FF(a,b,c,d,x[k+0], S11,0xD76AA478);
d=md5_FF(d,a,b,c,x[k+1], S12,0xE8C7B756);
c=md5_FF(c,d,a,b,x[k+2], S13,0x242070DB);
b=md5_FF(b,c,d,a,x[k+3], S14,0xC1BDCEEE);
a=md5_FF(a,b,c,d,x[k+4], S11,0xF57C0FAF);
d=md5_FF(d,a,b,c,x[k+5], S12,0x4787C62A);
c=md5_FF(c,d,a,b,x[k+6], S13,0xA8304613);
b=md5_FF(b,c,d,a,x[k+7], S14,0xFD469501);
a=md5_FF(a,b,c,d,x[k+8], S11,0x698098D8);
d=md5_FF(d,a,b,c,x[k+9], S12,0x8B44F7AF);
c=md5_FF(c,d,a,b,x[k+10],S13,0xFFFF5BB1);
b=md5_FF(b,c,d,a,x[k+11],S14,0x895CD7BE);
a=md5_FF(a,b,c,d,x[k+12],S11,0x6B901122);
d=md5_FF(d,a,b,c,x[k+13],S12,0xFD987193);
c=md5_FF(c,d,a,b,x[k+14],S13,0xA679438E);
b=md5_FF(b,c,d,a,x[k+15],S14,0x49B40821);
a=md5_GG(a,b,c,d,x[k+1], S21,0xF61E2562);
d=md5_GG(d,a,b,c,x[k+6], S22,0xC040B340);
c=md5_GG(c,d,a,b,x[k+11],S23,0x265E5A51);
b=md5_GG(b,c,d,a,x[k+0], S24,0xE9B6C7AA);
a=md5_GG(a,b,c,d,x[k+5], S21,0xD62F105D);
d=md5_GG(d,a,b,c,x[k+10],S22,0x2441453);
c=md5_GG(c,d,a,b,x[k+15],S23,0xD8A1E681);
b=md5_GG(b,c,d,a,x[k+4], S24,0xE7D3FBC8);
a=md5_GG(a,b,c,d,x[k+9], S21,0x21E1CDE6);
d=md5_GG(d,a,b,c,x[k+14],S22,0xC33707D6);
c=md5_GG(c,d,a,b,x[k+3], S23,0xF4D50D87);
b=md5_GG(b,c,d,a,x[k+8], S24,0x455A14ED);
a=md5_GG(a,b,c,d,x[k+13],S21,0xA9E3E905);
d=md5_GG(d,a,b,c,x[k+2], S22,0xFCEFA3F8);
c=md5_GG(c,d,a,b,x[k+7], S23,0x676F02D9);
b=md5_GG(b,c,d,a,x[k+12],S24,0x8D2A4C8A);
a=md5_HH(a,b,c,d,x[k+5], S31,0xFFFA3942);
d=md5_HH(d,a,b,c,x[k+8], S32,0x8771F681);
c=md5_HH(c,d,a,b,x[k+11],S33,0x6D9D6122);
b=md5_HH(b,c,d,a,x[k+14],S34,0xFDE5380C);
a=md5_HH(a,b,c,d,x[k+1], S31,0xA4BEEA44);
d=md5_HH(d,a,b,c,x[k+4], S32,0x4BDECFA9);
c=md5_HH(c,d,a,b,x[k+7], S33,0xF6BB4B60);
b=md5_HH(b,c,d,a,x[k+10],S34,0xBEBFBC70);
a=md5_HH(a,b,c,d,x[k+13],S31,0x289B7EC6);
d=md5_HH(d,a,b,c,x[k+0], S32,0xEAA127FA);
c=md5_HH(c,d,a,b,x[k+3], S33,0xD4EF3085);
b=md5_HH(b,c,d,a,x[k+6], S34,0x4881D05);
a=md5_HH(a,b,c,d,x[k+9], S31,0xD9D4D039);
d=md5_HH(d,a,b,c,x[k+12],S32,0xE6DB99E5);
c=md5_HH(c,d,a,b,x[k+15],S33,0x1FA27CF8);
b=md5_HH(b,c,d,a,x[k+2], S34,0xC4AC5665);
a=md5_II(a,b,c,d,x[k+0], S41,0xF4292244);
d=md5_II(d,a,b,c,x[k+7], S42,0x432AFF97);
c=md5_II(c,d,a,b,x[k+14],S43,0xAB9423A7);
b=md5_II(b,c,d,a,x[k+5], S44,0xFC93A039);
a=md5_II(a,b,c,d,x[k+12],S41,0x655B59C3);
d=md5_II(d,a,b,c,x[k+3], S42,0x8F0CCC92);
c=md5_II(c,d,a,b,x[k+10],S43,0xFFEFF47D);
b=md5_II(b,c,d,a,x[k+1], S44,0x85845DD1);
a=md5_II(a,b,c,d,x[k+8], S41,0x6FA87E4F);
d=md5_II(d,a,b,c,x[k+15],S42,0xFE2CE6E0);
c=md5_II(c,d,a,b,x[k+6], S43,0xA3014314);
b=md5_II(b,c,d,a,x[k+13],S44,0x4E0811A1);
a=md5_II(a,b,c,d,x[k+4], S41,0xF7537E82);
d=md5_II(d,a,b,c,x[k+11],S42,0xBD3AF235);
c=md5_II(c,d,a,b,x[k+2], S43,0x2AD7D2BB);
b=md5_II(b,c,d,a,x[k+9], S44,0xEB86D391);
a=md5_AddUnsigned(a,AA);
b=md5_AddUnsigned(b,BB);
c=md5_AddUnsigned(c,CC);
d=md5_AddUnsigned(d,DD);
}
return (md5_WordToHex(a)+md5_WordToHex(b)+md5_WordToHex(c)+md5_WordToHex(d)).toLowerCase();
}
//使用实例
document.write(md5('www.51-n.com'));
</script>
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