benim php kodu bu var:

$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$key = "bla";
$text = json_encode($rows);
$crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_ECB, $iv)
print base64_encode($crypttext);

ve bu bir iphone:

NSString *response = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"http://www.bla.com/myinfo.php"]  encoding:NSUTF8StringEncoding error:&error];
    response = [[NSData base64DataFromString:response] AESDecryptWithPassphrase:@"bla"];
    response = [[[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding] autorelease];
    NSLog(response);

but it doesn't work, anyone has a method that works?
thanks