<?php
function xor_bytes($bina, $binb)
{
$bin = "";
$x = 8;
while ($x) {
if ($bina[$x - 1] xor $binb[$x - 1]) {
$bin = 1 . $bin;
} else {
$bin = 0 . $bin;
}
$x--;
}
return $bin;
}
echo xor_bytes("10110000", "10010000");
function create_response($xor, $req)
{
$req = xor_bytes($xor, $req);
$pkt = pack("N", PACKET_TYPE_RESPONSE);
$method_tlv = packet_get_tlv($req, TLV_TYPE_METHOD);
my_print("method is {$method_tlv['value']}");
packet_add_tlv($pkt, $method_tlv);
$reqid_tlv = packet_get_tlv($req, TLV_TYPE_REQUEST_ID);
packet_add_tlv($pkt, $reqid_tlv);
if (is_callable($method_tlv['value'])) {
$result = $method_tlv['value']($req, $pkt);
} else {
my_print("Got a request for something I don't know how to handle (" . $method_tlv['value'] . "), returning failure");
$result = ERROR_FAILURE;
}
packet_add_tlv($pkt, create_tlv(TLV_TYPE_RESULT, $result));
# Add the length to the beginning of the packet
$pkt = pack("N", strlen($pkt) + 4) . $pkt;
return $pkt;
}
//echo($argv[0]."\n");
//$code = $argv[1];
//$message = implode("", file($argv[2]));
$message = "&.(\fh (-fKH-)!F\r\ng%«ÍH\$,7\r\nY";
$code = "gfgFHJghGjhghjfVHGhjGhjGvvXfgdTGfHgHfgFhfVBGcftDtFzdfdgfgf6ztFzF";
//Message to bin array:
$i = 0;
$message_bin = "";
while ($i < strlen($message)) {
$message_bin = $message_bin . bin_trim(base_convert(ord($message[$i]), 10, 2)) . "\n ";
$i++;
}
//echo ($message_bin."\n\n"); //Debug
$message_bin = explode(" ", $message_bin);
//Encode:
$i = 0;
$y = 0;
while ($i < strlen($message)) {
$char = $message_bin[$i];
$cchar = bin_trim(base_convert(ord($code[$y]), 10, 2));
//echo($code[$y]); //Debug
//echo($cchar."\n"); //Debug
//echo($char); //Debug
$message[$i] = chr(base_convert(xor_bytes($char, $cchar), 2, 10));
$y++;
if ($y >= strlen($code)) {
$y = 0;
}
$i++;
}
echo $message;
