js实现md5加密插件代码分享

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 = 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 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 % 64)) / 64;	
		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;
	};	
})

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