分享JavaScript与Java中MD5使用两个例子

在网上查了一下，在网上收集了Java与JavaScript中使用的两个例子，试验过，分享下。
1、Java：

package org.bearfly.test.md5;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Utils {
public static void main(String[] args){
System.out.println(getMd5String(""));
System.out.println(MD5("good"));
}

public final static String MD5(String s) {
char hexDigits[] = { '0', '1', '2', '3', '4',
   '5', '6', '7', '8', '9',
   'A', 'B', 'C', 'D', 'E', 'F' };
try {
 byte[] btInput = s.getBytes();
//获得MD5摘要算法的 MessageDigest 对象
 MessageDigest mdInst = MessageDigest.getInstance("MD5");
//使用指定的字节更新摘要
 mdInst.update(btInput);
//获得密文
 byte[] md = mdInst.digest();
//把密文转换成十六进制的字符串形式
 int j = md.length;
 char str[] = new char[j * 2];
 int k = 0;
 for (int i = 0; i < j; i++) {
 byte byte0 = md[i];
 str[k++] = hexDigits[byte0 >>> 4 & 0xf];
 str[k++] = hexDigits[byte0 & 0xf];
 }
 return new String(str);
}
catch (Exception e) {
 e.printStackTrace();
 return null;
}
}

public static String getMd5String(String str){
MessageDigest messageDigest = null;

try {
 messageDigest = MessageDigest.getInstance("MD5");

messageDigest.reset();

messageDigest.update(str.getBytes("UTF-8"));
} catch (NoSuchAlgorithmException e) {
 System.out.println("NoSuchAlgorithmException caught!");
 System.exit(-1);
} catch (UnsupportedEncodingException e) {
 e.printStackTrace();
}

byte[] byteArray = messageDigest.digest();

StringBuffer md5StrBuff = new StringBuffer();

for (int i = 0; i < byteArray.length; i++) {  
 if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)
 md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
 else
 md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
}

return md5StrBuff.toString();
}
}

2、JavaScript:
md5.js

var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
var b64pad = ""; /* base-64 pad character. "=" for strict RFC compliance */
var chrsz = 8; /* bits per input character. 8 - ASCII; 16 - Unicode */

/*
* These are the functions you'll usually want to call
* They take string arguments and return either hex or base-64 encoded strings
*/
function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}
function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));}
function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}
function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }
function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }
function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }

/*
* Perform a simple self-test to see if the VM is working
*/
function md5_vm_test()
{
return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
}

/*
* Calculate the MD5 of an array of little-endian words, and a bit length
*/
function core_md5(x, len)
{
/* append padding */
x[len >> 5] |= 0x80 << ((len) ％ 32);
x[(((len + 64) >>> 9) << 4) + 14] = len;

var a = 1732584193;
var b = -271733879;
var c = -1732584194;
var d = 271733878;

for(var i = 0; i < x.length; i += 16)
{
var olda = a;
var oldb = b;
var oldc = c;
var oldd = d;

a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
c = md5_ff(c, d, a, b, x[i+ 2], 17, 606105819);
b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
d = md5_ff(d, a, b, c, x[i+ 5], 12, 1200080426);
c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
a = md5_ff(a, b, c, d, x[i+ 8], 7 , 1770035416);
d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
a = md5_ff(a, b, c, d, x[i+12], 7 , 1804603682);
d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
b = md5_ff(b, c, d, a, x[i+15], 22, 1236535329);

a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
c = md5_gg(c, d, a, b, x[i+11], 14, 643717713);
b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
d = md5_gg(d, a, b, c, x[i+10], 9 , 38016083);
c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
a = md5_gg(a, b, c, d, x[i+ 9], 5 , 568446438);
d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
b = md5_gg(b, c, d, a, x[i+ 8], 20, 1163531501);
a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
c = md5_gg(c, d, a, b, x[i+ 7], 14, 1735328473);
b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
c = md5_hh(c, d, a, b, x[i+11], 16, 1839030562);
b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
d = md5_hh(d, a, b, c, x[i+ 4], 11, 1272893353);
c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
a = md5_hh(a, b, c, d, x[i+13], 4 , 681279174);
d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
b = md5_hh(b, c, d, a, x[i+ 6], 23, 76029189);
a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
c = md5_hh(c, d, a, b, x[i+15], 16, 530742520);
b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
d = md5_ii(d, a, b, c, x[i+ 7], 10, 1126891415);
c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
a = md5_ii(a, b, c, d, x[i+12], 6 , 1700485571);
d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
a = md5_ii(a, b, c, d, x[i+ 8], 6 , 1873313359);
d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
b = md5_ii(b, c, d, a, x[i+13], 21, 1309151649);
a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
c = md5_ii(c, d, a, b, x[i+ 2], 15, 718787259);
b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

a = safe_add(a, olda);
b = safe_add(b, oldb);
c = safe_add(c, oldc);
d = safe_add(d, oldd);
}
return Array(a, b, c, d);

}

/*
* These functions implement the four basic operations the algorithm uses.
*/
function md5_cmn(q, a, b, x, s, t)
{
return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
}
function md5_ff(a, b, c, d, x, s, t)
{
return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function md5_gg(a, b, c, d, x, s, t)
{
return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function md5_hh(a, b, c, d, x, s, t)
{
return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
function md5_ii(a, b, c, d, x, s, t)
{
return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}

/*
* Calculate the HMAC-MD5, of a key and some data
*/
function core_hmac_md5(key, data)
{
var bkey = str2binl(key);
if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);

var ipad = Array(16), opad = Array(16);
for(var i = 0; i < 16; i++)
{
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5C5C5C5C;
}

var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
return core_md5(opad.concat(hash), 512 + 128);
}

/*
* Add integers, wrapping at 2^32. This uses 16-bit operations internally
* to work around bugs in some JS interpreters.
*/
function safe_add(x, y)
{
var lsw = (x & 0xFFFF) + (y & 0xFFFF);
var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xFFFF);
}

/*
* Bitwise rotate a 32-bit number to the left.
*/
function bit_rol(num, cnt)
{
return (num << cnt) | (num >>> (32 - cnt));
}

/*
* Convert a string to an array of little-endian words
* If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
*/
function str2binl(str)
{
var bin = Array();
var mask = (1 << chrsz) - 1;
for(var i = 0; i < str.length * chrsz; i += chrsz)
bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i％32);
return bin;
}

/*
* Convert an array of little-endian words to a string
*/
function binl2str(bin)
{
var str = "";
var mask = (1 << chrsz) - 1;
for(var i = 0; i < bin.length * 32; i += chrsz)
str += String.fromCharCode((bin[i>>5] >>> (i ％ 32)) & mask);
return str;
}

/*
* Convert an array of little-endian words to a hex string.
*/
function binl2hex(binarray)
{
var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
var str = "";
for(var i = 0; i < binarray.length * 4; i++)
{
str += hex_tab.charAt((binarray[i>>2] >> ((i％4)*8+4)) & 0xF) +
 hex_tab.charAt((binarray[i>>2] >> ((i％4)*8 )) & 0xF);
}
return str;
}

/*
* Convert an array of little-endian words to a base-64 string
*/
function binl2b64(binarray)
{
var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var str = "";
for(var i = 0; i < binarray.length * 4; i += 3)
{
var triplet = (((binarray[i >> 2] >> 8 * ( i ％4)) & 0xFF) << 16)
 | (((binarray[i+1 >> 2] >> 8 * ((i+1)％4)) & 0xFF) << 8 )
 | ((binarray[i+2 >> 2] >> 8 * ((i+2)％4)) & 0xFF);
for(var j = 0; j < 4; j++)
{
if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
}
}
return str;
}

md5.html

<html>
<head>
<title>md5_Test</title>
<script type="text/javascript" src="md5.js"></script>
<link rel="stylesheet" type="text/css" href="bearfly.css" />
</head>
<body>
<script type="text/javascript">
 document.write("myPassword MD5: ",hex_md5("md5Test").toUpperCase());
</script>
</body>
</html>

补充：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();
}