/*
Convert a raw string to a hex string
function rstr2hex(input) {
	  var hexTab = '0123456789abcdef';
	  var output = '';
	  var x;
	  var i;

	  for (i = 0; i < input.length; i += 1) {
	    x = input.charCodeAt(i);
	    output += hexTab.charAt(x >>> 4 & 0x0f) + hexTab.charAt(x & 0x0f);
	  }

	  return output;
	}