var sbox = new Array(256);

var key = new Array(256);



function RC4(strTexto, strClave) {

	var i, j, k, temp, cipherby, cipher;



	i = 0;

	j = 0;

	cipher = "";

	temp = 0;



	InicializarRC4(strClave);



	for (a = 0; a < strTexto.length; a++) {

		i = (i + 1) % 256;

		j = (j + sbox[i]) % 256;

		temp = sbox[i];

		sbox[i] = sbox[j];

		sbox[j] = temp;



		k = sbox[(sbox[i] + sbox[j]) % 256];



		cipherby = strTexto.charCodeAt(a) ^ k;

		cipher = cipher + String.fromCharCode(cipherby);

	}

	return(cipher);

}





function InicializarRC4(strLlave) {

	var a, b, tempSwap;



	for (a = 0; a < 256; a++) {

		key[a] = (strLlave.charCodeAt(a % strLlave.length)) % 256;

		sbox[a] = a;

	}



	b = 0;

	for (a = 0; a < 256; a++) {

		b = (b + sbox[a] + key[a]) % 256;

		tempSwap = sbox[a];

		sbox[a] = sbox[b];

		sbox[b] = tempSwap;

	}

}



function canDoRC4() {

	return StringToHex(RC4("abc","abc")) == "ACFFBA"

}