use Crypt::Rijndael_PP ':all';

 $key = "1234567890ABCDEF" x 4; # 256bit hex number
 
 $cipher = Crypt::Rijndael_PP->new( pack('H*', $key), MODE_CBC );
 
 $c_txt = $cipher->encrypt($data);
 $p_txt = $cipher->decrypt($c_txt);

	
print "--> encoded text = $c_txt\n";
print "--> decoded text = $p_txt\n";