/**
 * CVS $Id: security.js,v 1.9 2010/06/29 07:14:16 marbjo Exp $
 */

var PlatsR_Security = {
		
	usernameCookie: 'PlatsR_SID',
	pwdigestCookie: 'PlatsR_STMP',

    createCookie: function(name, value, rememberMe) {
	    var days, date, expires;
		if (rememberMe) {
	    	days = 4;
	        date = new Date();
	        date.setTime(date.getTime()+(days*24*60*60*1000));
	        expires = "; expires="+date.toGMTString();
	    } else {
	        date = new Date();
	        date.setTime(date.getTime()+(60000));
	        expires = "; expires="+date.toGMTString();
	    }
	    document.cookie = name+"="+value+expires+"; path=/";
	},

    createUserCookies: function(username, password) {
		if (username && password) {
			PlatsR_Security.createCookie(this.usernameCookie, username);
			PlatsR_Security.createCookie(this.pwdigestCookie, PlatsR_Security.md5.digest(password));
		} else {
			PlatsR_Security.createCookie(this.usernameCookie, 'Användarnamn');
			PlatsR_Security.createCookie(this.pwdigestCookie, PlatsR_Security.md5.digest('Lösenord'));
		}
	},

	getCookie: function(name) {
		if (document.cookie.length>0) {
			c_start=document.cookie.indexOf(name + "=");
			if (c_start!=-1) {
				c_start=c_start + name.length+1;
				c_end=document.cookie.indexOf(";",c_start);
				if (c_end == -1) {
					c_end = document.cookie.length;
				}
				return unescape(document.cookie.substring(c_start,c_end));
		    }
		}
		return "";
	},

	destroyCookie: function(name) {
		var expdate = new Date();
		expdate.setTime(expdate.getTime() - 1);		
	    document.cookie = name+"="+null+"; expires="+expdate.toGMTString()+"; path=/";
	},

	destroyUserCookies: function() {
		PlatsR_Security.destroyCookie(PlatsR_Security.usernameCookie);
		PlatsR_Security.destroyCookie(PlatsR_Security.pwdigestCookie);
	},

	/**
	*
	*  MD5 (Message-Digest Algorithm)
	*  http://www.webtoolkit.info/
	*
	**/
	md5: {
		 
		RotateLeft: function(lValue, iShiftBits) {
			return (lValue<<iShiftBits) | (lValue>>>(32-iShiftBits));
		},
	 
		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);
			}
	 	},
	 
	 	F: function(x,y,z) { return (x & y) | ((~x) & z); },
	 	G: function(x,y,z) { return (x & z) | (y & (~z)); },
	 	H: function(x,y,z) { return (x ^ y ^ z); },
		I: function(x,y,z) { return (y ^ (x | (~z))); },
	 
		FF: function(a,b,c,d,x,s,ac) {
			a = PlatsR_Security.md5.AddUnsigned(a, PlatsR_Security.md5.AddUnsigned(PlatsR_Security.md5.AddUnsigned(PlatsR_Security.md5.F(b, c, d), x), ac));
			return PlatsR_Security.md5.AddUnsigned(PlatsR_Security.md5.RotateLeft(a, s), b);
		},
	 
		GG: function(a,b,c,d,x,s,ac) {
			a = PlatsR_Security.md5.AddUnsigned(a, PlatsR_Security.md5.AddUnsigned(PlatsR_Security.md5.AddUnsigned(PlatsR_Security.md5.G(b, c, d), x), ac));
			return PlatsR_Security.md5.AddUnsigned(PlatsR_Security.md5.RotateLeft(a, s), b);
		},
	 
		HH: function(a,b,c,d,x,s,ac) {
			a = PlatsR_Security.md5.AddUnsigned(a, PlatsR_Security.md5.AddUnsigned(PlatsR_Security.md5.AddUnsigned(PlatsR_Security.md5.H(b, c, d), x), ac));
			return PlatsR_Security.md5.AddUnsigned(PlatsR_Security.md5.RotateLeft(a, s), b);
		},
	 
		II: function(a,b,c,d,x,s,ac) {
			a = PlatsR_Security.md5.AddUnsigned(a, PlatsR_Security.md5.AddUnsigned(PlatsR_Security.md5.AddUnsigned(PlatsR_Security.md5.I(b, c, d), x), ac));
			return PlatsR_Security.md5.AddUnsigned(PlatsR_Security.md5.RotateLeft(a, s), b);
		},
	 
		ConvertToWordArray: function(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;
		},
	 
		WordToHex: function(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;
		},
	 
		Utf8Encode: function(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;
		},
	 
		digest: 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 = PlatsR_Security.md5.Utf8Encode(string);
		 
			x = PlatsR_Security.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=PlatsR_Security.md5.FF(a,b,c,d,x[k+0], S11,0xD76AA478);
				d=PlatsR_Security.md5.FF(d,a,b,c,x[k+1], S12,0xE8C7B756);
				c=PlatsR_Security.md5.FF(c,d,a,b,x[k+2], S13,0x242070DB);
				b=PlatsR_Security.md5.FF(b,c,d,a,x[k+3], S14,0xC1BDCEEE);
				a=PlatsR_Security.md5.FF(a,b,c,d,x[k+4], S11,0xF57C0FAF);
				d=PlatsR_Security.md5.FF(d,a,b,c,x[k+5], S12,0x4787C62A);
				c=PlatsR_Security.md5.FF(c,d,a,b,x[k+6], S13,0xA8304613);
				b=PlatsR_Security.md5.FF(b,c,d,a,x[k+7], S14,0xFD469501);
				a=PlatsR_Security.md5.FF(a,b,c,d,x[k+8], S11,0x698098D8);
				d=PlatsR_Security.md5.FF(d,a,b,c,x[k+9], S12,0x8B44F7AF);
				c=PlatsR_Security.md5.FF(c,d,a,b,x[k+10],S13,0xFFFF5BB1);
				b=PlatsR_Security.md5.FF(b,c,d,a,x[k+11],S14,0x895CD7BE);
				a=PlatsR_Security.md5.FF(a,b,c,d,x[k+12],S11,0x6B901122);
				d=PlatsR_Security.md5.FF(d,a,b,c,x[k+13],S12,0xFD987193);
				c=PlatsR_Security.md5.FF(c,d,a,b,x[k+14],S13,0xA679438E);
				b=PlatsR_Security.md5.FF(b,c,d,a,x[k+15],S14,0x49B40821);
				a=PlatsR_Security.md5.GG(a,b,c,d,x[k+1], S21,0xF61E2562);
				d=PlatsR_Security.md5.GG(d,a,b,c,x[k+6], S22,0xC040B340);
				c=PlatsR_Security.md5.GG(c,d,a,b,x[k+11],S23,0x265E5A51);
				b=PlatsR_Security.md5.GG(b,c,d,a,x[k+0], S24,0xE9B6C7AA);
				a=PlatsR_Security.md5.GG(a,b,c,d,x[k+5], S21,0xD62F105D);
				d=PlatsR_Security.md5.GG(d,a,b,c,x[k+10],S22,0x2441453);
				c=PlatsR_Security.md5.GG(c,d,a,b,x[k+15],S23,0xD8A1E681);
				b=PlatsR_Security.md5.GG(b,c,d,a,x[k+4], S24,0xE7D3FBC8);
				a=PlatsR_Security.md5.GG(a,b,c,d,x[k+9], S21,0x21E1CDE6);
				d=PlatsR_Security.md5.GG(d,a,b,c,x[k+14],S22,0xC33707D6);
				c=PlatsR_Security.md5.GG(c,d,a,b,x[k+3], S23,0xF4D50D87);
				b=PlatsR_Security.md5.GG(b,c,d,a,x[k+8], S24,0x455A14ED);
				a=PlatsR_Security.md5.GG(a,b,c,d,x[k+13],S21,0xA9E3E905);
				d=PlatsR_Security.md5.GG(d,a,b,c,x[k+2], S22,0xFCEFA3F8);
				c=PlatsR_Security.md5.GG(c,d,a,b,x[k+7], S23,0x676F02D9);
				b=PlatsR_Security.md5.GG(b,c,d,a,x[k+12],S24,0x8D2A4C8A);
				a=PlatsR_Security.md5.HH(a,b,c,d,x[k+5], S31,0xFFFA3942);
				d=PlatsR_Security.md5.HH(d,a,b,c,x[k+8], S32,0x8771F681);
				c=PlatsR_Security.md5.HH(c,d,a,b,x[k+11],S33,0x6D9D6122);
				b=PlatsR_Security.md5.HH(b,c,d,a,x[k+14],S34,0xFDE5380C);
				a=PlatsR_Security.md5.HH(a,b,c,d,x[k+1], S31,0xA4BEEA44);
				d=PlatsR_Security.md5.HH(d,a,b,c,x[k+4], S32,0x4BDECFA9);
				c=PlatsR_Security.md5.HH(c,d,a,b,x[k+7], S33,0xF6BB4B60);
				b=PlatsR_Security.md5.HH(b,c,d,a,x[k+10],S34,0xBEBFBC70);
				a=PlatsR_Security.md5.HH(a,b,c,d,x[k+13],S31,0x289B7EC6);
				d=PlatsR_Security.md5.HH(d,a,b,c,x[k+0], S32,0xEAA127FA);
				c=PlatsR_Security.md5.HH(c,d,a,b,x[k+3], S33,0xD4EF3085);
				b=PlatsR_Security.md5.HH(b,c,d,a,x[k+6], S34,0x4881D05);
				a=PlatsR_Security.md5.HH(a,b,c,d,x[k+9], S31,0xD9D4D039);
				d=PlatsR_Security.md5.HH(d,a,b,c,x[k+12],S32,0xE6DB99E5);
				c=PlatsR_Security.md5.HH(c,d,a,b,x[k+15],S33,0x1FA27CF8);
				b=PlatsR_Security.md5.HH(b,c,d,a,x[k+2], S34,0xC4AC5665);
				a=PlatsR_Security.md5.II(a,b,c,d,x[k+0], S41,0xF4292244);
				d=PlatsR_Security.md5.II(d,a,b,c,x[k+7], S42,0x432AFF97);
				c=PlatsR_Security.md5.II(c,d,a,b,x[k+14],S43,0xAB9423A7);
				b=PlatsR_Security.md5.II(b,c,d,a,x[k+5], S44,0xFC93A039);
				a=PlatsR_Security.md5.II(a,b,c,d,x[k+12],S41,0x655B59C3);
				d=PlatsR_Security.md5.II(d,a,b,c,x[k+3], S42,0x8F0CCC92);
				c=PlatsR_Security.md5.II(c,d,a,b,x[k+10],S43,0xFFEFF47D);
				b=PlatsR_Security.md5.II(b,c,d,a,x[k+1], S44,0x85845DD1);
				a=PlatsR_Security.md5.II(a,b,c,d,x[k+8], S41,0x6FA87E4F);
				d=PlatsR_Security.md5.II(d,a,b,c,x[k+15],S42,0xFE2CE6E0);
				c=PlatsR_Security.md5.II(c,d,a,b,x[k+6], S43,0xA3014314);
				b=PlatsR_Security.md5.II(b,c,d,a,x[k+13],S44,0x4E0811A1);
				a=PlatsR_Security.md5.II(a,b,c,d,x[k+4], S41,0xF7537E82);
				d=PlatsR_Security.md5.II(d,a,b,c,x[k+11],S42,0xBD3AF235);
				c=PlatsR_Security.md5.II(c,d,a,b,x[k+2], S43,0x2AD7D2BB);
				b=PlatsR_Security.md5.II(b,c,d,a,x[k+9], S44,0xEB86D391);
				a=PlatsR_Security.md5.AddUnsigned(a,AA);
				b=PlatsR_Security.md5.AddUnsigned(b,BB);
				c=PlatsR_Security.md5.AddUnsigned(c,CC);
				d=PlatsR_Security.md5.AddUnsigned(d,DD);
			}
		 
			var temp = PlatsR_Security.md5.WordToHex(a)+PlatsR_Security.md5.WordToHex(b)+PlatsR_Security.md5.WordToHex(c)+PlatsR_Security.md5.WordToHex(d);
		 
			return temp.toLowerCase();
		}
	}

};