This was not written by me; it was written by someone who passed it down to me. I lost contact with the author of the code. I have been using this code for a few years and just now realized this error. It seems that the letter sequence rkey1
messes up the output.
For example turkey1
outputs as decryption as tur79y1
. This Perl code should output turkey1
and not tur79y1
:
$String = "turkey1";
$e = &encode_escaped(&palace_encrypt($String));
$d = &palace_decrypt(&decode_escaped("'\"".$e."\"'"));
print $d."<br>\n";
KEY REMOVED BY OWNER
sub palace_decrypt
{
local $lastchar = 0;
local $rc = 0;
local @bs;
for($i=length($_[0])-1; $i>=0; $i--) {
local $tmp = ord(substr($_[0], $i, 1));
$bs[$i] = $tmp ^ $palace_key[$rc++] ^ $lastchar;
$lastchar = $tmp ^ $palace_key[$rc++];
}
return join("", map { chr($_) } @bs);
}
sub decode_escaped
{
$_[0] =~ m/\"(.*)\"/;
local $str = $1;
$str =~ s/\\\\/\0/g;
$str =~ s/\\"/"/g;
$str =~ s/\\(..)/pack("c",hex($1))/ge;
$str =~ s/\0/\\/g;
return $str;
}
sub palace_encrypt
{
local $lastchar = 0;
local $rc = 0;
local @bs;
for($i=length($_[0])-1; $i>=0; $i--) {
local $b = ord(substr($_[0], $i, 1));
$bs[$i] = $b ^ $palace_key[$rc++] ^ $lastchar;
$lastchar = $bs[$i] ^ $palace_key[$rc++];
}
return join("", map { chr($_) } @bs);
}
sub encode_escaped
{
local $str = $_[0];
$str =~ s/\\/\\\\/g;
$str =~ s/([^A-Za-z0-9\.\\])/sprintf("\\%2.2X", ord($1))/ge;
return $str;
}