"I have a string encrypted with mcrypt and encoded in base64. I unbase64 this string and I decrypt it using mcrypt. I looks like I got the exact same string but when I compare it with == it is not the same."


<?php
  $td = @mcrypt_module_open('rijndael-128', '', 'ecb', '');
                                                                                                                                              
  $iv_size  = mcrypt_enc_get_iv_size($td);
  $key_size = mcrypt_enc_get_key_size($td);
  $key = substr(sha1('very secret key'), 0, $key_size);

  /* Init encryption module */
  @mcrypt_generic_init($td, $key, '');

  /* Decrypt text */
  $text = mdecrypt_generic($td, $crypt_text);
  echo $text;
?>