Algoritmo Rijndael de 128 bits en php

[walterdevel]

Te paso un ejemplo mio funcionando 100%:

Código PHP:

function hex2bin($hexdata) {
  $bindata = "";
  for ($i = 0; $i < strlen($hexdata); $i += 2) {
    $bindata .= chr(hexdec(substr($hexdata, $i, 2)));
  }
  return $bindata;
}
 
 
define('CIPHER_IV', hex2bin(md5('123456789abcdefg')));
 
 
function decrypt($code, $key) {
 
  //$code = hex2bin($code);
  $td = mcrypt_module_open("rijndael-128", "", "cbc", "fedcba9876543210");
 
  mcrypt_generic_init($td, $key, "fedcba9876543210");
  $decrypted = mdecrypt_generic($td, $code);
 
  mcrypt_generic_deinit($td);
  mcrypt_module_close($td);
 
  return $decrypted;
}
 
function encrypt($str, $key) {
  $td = mcrypt_module_open("rijndael-128", "", "cbc", "fedcba9876543210");
 
  mcrypt_generic_init($td, $key, "fedcba9876543210");
  $encrypted = mcrypt_generic($td, $str);
 
  mcrypt_generic_deinit($td);
  mcrypt_module_close($td);
 
  return $encrypted;
}
 
 
$iv = "fedcba9876543210";
 
$key = '123456789abcdefg';
 
 
$string = 'esta es la candea a encriptar/desencriptar';
 
$c = base64_encode(encrypt($string, $key));
$o = decrypt(base64_decode($c), $key);
 

se usa base64 porque el AES devuelve caracteres no logibles.