Encrypted on iPhone, but absolutely will not decrypt in php - iphone

Question

ok
I'm using this to encrypt my data on iPhone:
- (NSData *)AES128EncryptWithKey:(NSString *)key{
char keyPtr[kCCKeySizeAES128 + 1]; // room for terminator (unused)
bzero( keyPtr, sizeof( keyPtr ) ); // fill with zeroes (for padding)
// fetch key data
[key getCString:keyPtr maxLength:sizeof( keyPtr ) encoding:NSUTF8StringEncoding];
NSUInteger dataLength = [self length];
//See the doc: For block ciphers, the output size will always be less than or
//equal to the input size plus the size of one block.
//That's why we need to add the size of one block here
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer = malloc( bufferSize );
size_t numBytesEncrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt( kCCEncrypt, kCCAlgorithmAES128, kCCOptionECBMode /*| kCCOptionPKCS7Padding*/,
keyPtr, kCCKeySizeAES128,
NULL /* initialization vector (optional) */,
[self bytes], dataLength, /* input */
buffer, bufferSize, /* output */
&numBytesEncrypted );
if( cryptStatus == kCCSuccess )
{
//the returned NSData takes ownership of the buffer and will free it on deallocation
return [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted];
}
free( buffer ); //free the buffer
return nil;}
on my server my php script uses:
$base64encoded_ciphertext = $pass;
mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, base64_decode($pass), 'ecb');
$decrypted = $res_non;
$dec_s2 = strlen($decrypted);
$padding = ord($decrypted[$dec_s2-1]);
$decrypted = substr($decrypted, 0, -$padding);
return $decrypted;
However, no matter what the key is, it fails.
The keys are always 10 characters long. I build a password using the system clock to get values.
On the php side I duplicate the key building and according to my script, the key ALWAYS matches what the iPhone used to encrypt.
This code worked in a different script, from a different app… and still works.
I've done a dead cut and paste of all related code and still nothing.
I just don't know what I'm doing wrong… beyond what I'm trying to do maybe being absolutely impossible

Answer 1

For AES 128 you should use 16 byte Encryption key, AES 192 it is 24, AES 256 it is 32 byte. For your case you should use encryption key like #"1234567890123456".