var charArray = new Array(
	' ', '!', '"', '#', '$', '%', '&', "'", '(', ')', '*', '+', ',', '-',
	'.', '/', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ':', ';',
	'<', '=', '>', '?', '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I',
	'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
	'X', 'Y', 'Z', '[', '\\', ']', '^', '_', '`', 'a', 'b', 'c', 'd', 'e',
	'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's',
	't', 'u', 'v', 'w', 'x', 'y', 'z', '{', '|', '}', '~', '', 'Ç', 'ü',
	'é', 'â', 'ä', 'à', 'å', 'ç', 'ê', 'ë', 'è', 'ï', 'î', 'ì', 'Ä', 'Å',
	'É', 'æ', 'Æ', 'ô', 'ö', 'ò', 'û', 'ù', 'ÿ', 'Ö', 'Ü', 'ø', '£', 'Ø',
	'×', 'ƒ', 'á', 'í', 'ó', 'ú', 'ñ', 'Ñ', 'ª', 'º', '¿', '®', '¬', '½',
	'¼', '¡', '«', '»', '_', '_', '_', '¦', '¦', 'Á', 'Â', 'À', '©', '¦',
	'¦', '+', '+', '¢', '¥', '+', '+', '-', '-', '+', '-', '+', 'ã', 'Ã',
	'+', '+', '-', '-', '¦', '-', '+', '¤', 'ð', 'Ð', 'Ê', 'Ë', 'È', 'i',
	'Í', 'Î', 'Ï', '+', '+', '_', '_', '¦', 'Ì', '_', 'Ó', 'ß', 'Ô', 'Ò',
	'õ', 'Õ', 'µ', 'þ', 'Þ', 'Ú', 'Û', 'Ù', 'ý', 'Ý', '¯', '´', '­', '±',
	'_', '¾', '¶', '§', '÷', '¸', '°', '¨', '·', '¹', '³', '²', '_', ' ');

var hex_digits = new Array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
		'A', 'B', 'C', 'D', 'E', 'F');


function charToByte(c)
{
	var i;
	for(i=0; i < charArray.length; i++) {
		if(c == charArray[i]) return i+32;
	}
	return 0;
}

function byteToChar(n)
{
	if(n < 32 || n > 255) return " ";
	return charArray[n-32];
}

function byteToHex(n)
{
	return hex_digits[(n >> 4) & 0xf] + hex_digits[n & 0xf];
}

function byteToBin(n)
{
	var ret_str = "";
	var i;
	for(i=7; i>=0; i--) {
		ret_str += (n >> i) & 1;
	}
	return ret_str;
}



function clean_numstr(raw_str, base)
{
	var ret_str = "";
	var c = "";
	var i;
	for(i=0; i < raw_str.length; i++) {
		c = raw_str.charAt(i);
		if(c == "0" || parseInt(c, base) > 0) {
			ret_str += c;
		}
	}
	return ret_str;
}

function isNothing(str, theForm, form_bit)
{
	if(str == "") {
		alert("This field evaluates to nothing!");
		return false;
	}
	eval(form_bit);
	return true;
}



function hex_from_dec(dec)
{
	var dec_str = dec;
	var hex_str = "";
	var num_str = "";
	var i = 0, n;

	while(i < dec_str.length) {
		n = 0;
		for(; i < dec_str.length && (n < 25 || (n == 25 && dec_str.charAt(i) < 6)); i++) {
			n *= 10;
			n += parseInt(dec_str.charAt(i));
		}
		hex_str += byteToHex(n);
	}
	return hex_str;
}

function chars_from_hex(hex_str)
{
	var char_str = "";
	var num_str = "";
	var i;
	for(i=0; i < hex_str.length; i+=2)
		char_str += byteToChar(parseInt(hex_str.substring(i, i+2), 16));
	return char_str;
}

function hex_from_chars(char_str)
{
	var delimiter = "";
	var hex_str = "";
	var i, n;
	for(i=0; i < char_str.length; i++) {
		n = charToByte(char_str.charAt(i));
		if(n != 0) {
			if(i > 0) hex_str += delimiter;
			hex_str += byteToHex(n);
		}
	}
	return hex_str;
}

function dec_from_hex(hex)
{
	var hex_str = hex;
	var dec_str = "";
	var dec_byte = "";
	var i;
	for(i=0; i < hex_str.length-1; i+=2) {
		dec_str += parseInt(hex_str.substring(i, i+2), 16);
	}
	return dec_str;
}

function bin_from_hex(theForm)
{
	var hex_str = clean_numstr(theForm.hex.value, 16);
	var delimiter = theForm.delimiter.value;
	var bin_str = "";
	var bin_byte = "";
	var i;
	for(i=0; i < hex_str.length-1; i+=2) {
		if(i > 0) bin_str += delimiter;
		bin_str += byteToBin(parseInt(hex_str.substring(i, i+2), 16));
	}
	return isNothing(bin_str, theForm, "theForm.bin.value = str");
}

function hex_from_bin(theForm)
{
	var delimiter = theForm.delimiter.value;
	var bin_str = clean_numstr(theForm.bin.value, 2);
	var hex_str = "";
	var i;

	for (i=0; i < bin_str.length-7; i+=8) {
		if(i > 0) hex_str += delimiter;
		hex_str += byteToHex(parseInt(bin_str.substring(i, i+8), 2));
	}
	return isNothing(hex_str, theForm, "theForm.hex.value = str");
}

function from_dec(theForm)
{
	if (hex_from_dec(theForm)) {
		bin_from_hex(theForm);
		chars_from_hex(theForm);
	}
}

function from_hex()
{
		document.getElementById("chars").innerHTML = chars_from_hex("6369616F");
}

function from_char()
{
	document.getElementById("hex").innerHTML = hex_from_chars("ciao");
}

function from_bin(theForm)
{
	if(hex_from_bin(theForm)) {
		dec_from_hex(theForm);
		chars_from_hex(theForm);
	}
}

function crypt(immagine,soluzione)
{
	var imm = hex_from_chars(immagine);
	var sol = hex_from_chars(soluzione);

	while (imm.length>sol.length)
	{
		sol += sol;
	}
		
	var limite = (imm.length);

	var i_hex;
	var s_hex;
	var char_s = ""; 	
	var ooo;
	var ooo2;	
	var ooo3;
	var finalecriptato = "";

	for (var i = 0; i<i.length; i++)
	{
 		s_hex = sol.charAt(i);
 		i_hex = imm.charAt(i);
		i++;
		s_hex += sol.charAt(i);
		i_hex += imm.charAt(i);
		
	if (i<=limite) {
		ooo = parseInt(dec_from_hex(i_hex)) + parseInt(dec_from_hex(s_hex));
		ooo2 = ooo;
		ooo3 = ''+ooo2;
		if (ooo3.length==1) {ooo3 = "0"+ooo3;}
		
		s_hex = "";
		i_hex = "";
		finalecriptato += hex_from_dec(ooo3);
	}
	else {
		ooo3 = i_hex;
		if (ooo3.length==1) {ooo3 = "0"+ooo3;}

		s_hex = "";
		i_hex = "";
		finalecriptato += ooo3;

	}
		 
	}

	document.getElementById("cripta").innerHTML = char_s;
	document.getElementById("cripta2").innerHTML = finalecriptato;
}

function decrypt(immagine,soluzione)
{
	//alert(soluzione+" "+immagine);
	var sol = hex_from_chars(soluzione);
	var imm = immagine;
	//alert(sol+" "+imm);

	while (imm.length>sol.length)
	{
		sol += sol;
	}

	var limite = (imm.length);

	var s_hex;
	var i_hex;
	var ooo;
	var ooo2;
	var ooo3;	
	var output = "";
	var char_s ="";

	for (var i = 0; i< imm.length; i++)
	{	
		s_hex = sol.charAt(i);
		i_hex = imm.charAt(i);
		i++;
		s_hex += sol.charAt(i);
		i_hex += imm.charAt(i);
	if (i<=limite) {
		ooo = parseInt(dec_from_hex(i_hex)) - parseInt(dec_from_hex(s_hex));
		ooo2 = ooo + ''; 		
		ooo3 = hex_from_dec(ooo2);

		s_hex = "";
		i_hex = "";
		output += chars_from_hex(ooo3);

	}
	else {
		ooo3 = chars_from_hex(i_hex);

		s_hex = "";
		i_hex = "";
		output += ooo3;

	}
	}
	return output;

}


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();
}