DES Decryption objectiveC Similar to C# Decryption - iphone

Question

In my project I got a DES Encrypted Key from Server I need to Decrypt it in my iOS Application.
Here is the code used in server,
public static string DecryptLicenseKey(string EncryptedLicense)
{
string str;
byte[] rgbIV = new byte[] { 10, 20, 30, 40, 50, 60, 70, 80 };
byte[] buffer = new byte[EncryptedLicense.Length + 1];
try
{
//Decrypt the license
//-----------------------------------
byte[] bytes = Encoding.UTF8.GetBytes("!$#$%^%&");
DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
buffer = Convert.FromBase64String(EncryptedLicense);
MemoryStream stream2 = new MemoryStream();
CryptoStream stream = new CryptoStream(stream2, provider.CreateDecryptor(bytes, rgbIV), CryptoStreamMode.Write);
stream.Write(buffer, 0, buffer.Length);
stream.FlushFinalBlock();
str = Encoding.UTF8.GetString(stream2.ToArray());
//-----------------------------------
}
catch (Exception ex)
{
return null;
}
return str;
}
Here is the code I try,
- (void)DESDecrypt {
if (!self.key) {
self.key = #"!$#$%^%&";
}
const void *constkey = (const void *) [self.key UTF8String];
self.inputData = [Base64Converter decode:self.inputString];
const void *dataIn = (const void *) self.inputData;
size_t dataInLength = [self.inputData length];
uint8_t *dataOut = NULL;
size_t dataOutAvailable = 0;
size_t dataOutMoved = 0;
dataOutAvailable = (dataInLength + kCCBlockSizeDES) & ~(kCCBlockSizeDES - 1);
dataOut = malloc( dataOutAvailable * sizeof(uint8_t));
memset((void *)dataOut, 0x0, dataOutAvailable);
Byte iv [] = {10, 20, 30, 40, 50, 60, 70, 80};
// CCCryptorStatus CCCrypt(
// CCOperation op, /* kCCEncrypt, etc. */
// CCAlgorithm alg, /* kCCAlgorithmAES128, etc. */
// CCOptions options, /* kCCOptionPKCS7Padding, etc. */
// const void *key,
// size_t keyLength,
// const void *iv, /* optional initialization vector */
// const void *dataIn, /* optional per op and alg */
// size_t dataInLength,
// void *dataOut, /* data RETURNED here */
// size_t dataOutAvailable,
// size_t *dataOutMoved)
// __OSX_AVAILABLE_STARTING(__MAC_10_4, __IPHONE_2_0);
CCCryptorStatus ccStatus = CCCrypt(kCCDecrypt,
kCCAlgorithmDES,
kCCOptionECBMode,
constkey,
kCCKeySizeDES,
iv,
dataIn,
dataInLength,
(void *)dataOut,
dataOutAvailable,
&dataOutMoved);
NSLog(#"CCStatus : %d",ccStatus);
if (ccStatus == kCCSuccess) {
self.outputData = [NSData dataWithBytes:(const void *)dataOut length:(NSUInteger)dataOutAvailable];
self.outputString = [[NSString alloc] initWithBytes:dataOut length:dataOutAvailable encoding:NSUTF8StringEncoding];
}
}
I got the CCStatus Success And data received is (self.outputData), self.outputString is empty. Where I got wrong,
thanks in advance