js实现md5加密插件代码分享

来源：爱玩科技网
本文主要和大家分享js实现md5加密插件代码，希望能帮助到大家。
//使用方法：
//引入文件<script src="yourURL/MD5.js" type="text/javascript" charset="utf-8"></script>
//var MD5=MD5.createMD5String（yourSrting）；(
	function(globle,factory){//判断执行环境是否为浏览器
	typeof window != "undefined" ? factory() : concole.log("当前环境不支持该插件");
	}
)(this,function(){
	//创建并实例化MD5对象并让他可以调用自身方法
	function MD5(string){
	this._this = this;
 	return this;
	}
	this.MD5=new MD5;	
	MD5.prototype.createMD5String=function(string) {	
	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 = 0xEFCDAB; 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, 0x5CD7BE);	
	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, 0x2B7EC6);	
	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 tempValue = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d);	
	return tempValue.toLowerCase();	
	}
	var rotateLeft = function(lValue, iShiftBits) {
	return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
	}
	var addUnsigned = function(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);
	}
	}
	var F = function(x, y, z) {
	return (x & y) | ((~ x) & z);	
	}	
	var G = function(x, y, z) {
	return (x & z) | (y & (~ z));	
	}	
	var H = function(x, y, z) {	
	return (x ^ y ^ z);	
	}	
	var I = function(x, y, z) {	
	return (y ^ (x | (~ z)));
	}	
	var FF = function(a, b, c, d, x, s, ac) {	
	a = addUnsigned(a, addUnsigned(addUnsigned(F(b, c, d), x), ac));
	return addUnsigned(rotateLeft(a, s), b);	
	};	
	var GG = function(a, b, c, d, x, s, ac) {	
	a = addUnsigned(a, addUnsigned(addUnsigned(G(b, c, d), x), ac));	
	return addUnsigned(rotateLeft(a, s), b);
	};	
	var HH = function(a, b, c, d, x, s, ac) {
	a = addUnsigned(a, addUnsigned(addUnsigned(H(b, c, d), x), ac));
	return addUnsigned(rotateLeft(a, s), b);	
	};	
	var II = function(a, b, c, d, x, s, ac) {	
	a = addUnsigned(a, addUnsigned(addUnsigned(I(b, c, d), x), ac));
	return addUnsigned(rotateLeft(a, s), b);
	};
	var convertToWordArray = function(string) {
	var lWordCount;	
	var lMessageLength = string.length;	
	var lNumberOfWordsTempOne = lMessageLength + 8;	
	var lNumberOfWordsTempTwo = (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % )) / ;	
	var lNumberOfWords = (lNumberOfWordsTempTwo + 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;
	};
	var wordToHex = function(lValue) {
	var WordToHexValue = "", WordToHexValueTemp = "", lByte, lCount;
	for (lCount = 0; lCount <= 3; lCount++) {
	lByte = (lValue >>> (lCount * 8)) & 255;
	WordToHexValueTemp = "0" + lByte.toString(16);
	WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2);
	}
	return WordToHexValue;
	};
	var uTF8Encode = function(string) {
	string = string.toString().replace(/\x0d\x0a/g, "\x0a");
	var output = "";
	for (var n = 0; n < string.length; n++) {	
	var c = string.charCodeAt(n);
	if (c < 128) {	
	output += String.fromCharCode(c);
	} else if ((c > 127) && (c < 2048)) {
	output += String.fromCharCode((c >> 6) | 192);
	output += String.fromCharCode((c & 63) | 128);
	} else {
	output += String.fromCharCode((c >> 12) | 224);	
	output += String.fromCharCode(((c >> 6) & 63) | 128);
	output += String.fromCharCode((c & 63) | 128);	
	}
	}
	return output;
	};	
})