//debe tener lib jquery.cookie
//retorna la longitud de bits maxima permitda junto con el codigo ascii
function strpad_char(c){
	var d="";
	var n=ord(c);
	var sn=new String(n);
	var l=sn.length;
	for(u=l;u<5;u++){
		d += "0";
	}
	return d+n
}
//retorna el codigo de caracter
function ord (string) {
    var str = string + '',
        code = str.charCodeAt(0);
    if (0xD800 <= code && code <= 0xDBFF) { // High surrogate (could change last hex to 0xDB7F to treat high private surrogates as single characters)
        var hi = code;
        if (str.length === 1) {
            return code; // This is just a high surrogate with no following low surrogate, so we return its value;
            // we could also throw an error as it is not a complete character, but someone may want to know
        }
        var low = str.charCodeAt(1);
        return ((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000;
    }
    if (0xDC00 <= code && code <= 0xDFFF) { // Low surrogate
        return code; // This is just a low surrogate with no preceding high surrogate, so we return its value;
        // we could also throw an error as it is not a complete character, but someone may want to know
    }
    return code;
}
//retorna uid mod
function loopmod(ciclo,factor,entrada){	
	var r=entrada;
	for(m=2;m<=ciclo;m++){
		r=(entrada*r)%factor;
	}
	return r;
}
//codificar
function ecs(s){
	var ps=new String(s);
	var ls=ps.length;
	var output=new String("");
	var input=new String("");
	var factor=$.cookie("factor");
	var ciclo=$.cookie("ciclo");
	for(a=0;a<=ls;a++){
		var posactstr=ps.substr((a-1),a);		
		if(posactstr.length>0){
			output+=loopmod(ciclo,factor,ord(posactstr))+" ";//para version 1
			//output+=loopmod(ciclo,factor,bin2hex(ord(posactstr)))+" ";//para version 2
			
		}
	}	
	return Base64.encode(output);
}
//decodificar
function decs(valor){
	var factor=$.cookie("factor");
	var ciclo=$.cookie("ciclo");
	return loopmod(ciclo,factor,valor);
}
function bin2hex (s) {
   var i, f = 0,
        a = [];
 
    s += '';
    f = s.length;
 
    for (i = 0; i < f; i++) {
        a[i] = s.charCodeAt(i).toString(16).replace(/^([\da-f])$/, "0$1");
    }
 
    return a.join('');
}
function hex2bin(hex)
{
    var bytes = [], str;

    for(var i=0; i< hex.length-1; i+=2){
        bytes.push(parseInt(hex.substr(i, 2), 16));
    }

    return String.fromCharCode.apply(String, bytes);    
}