Standard DES encryption JAVA C # generic

// <summary>
// des encryption
// </summary>
/// <param name= "str" > Strings to be encrypted </param>
//<param name= "key" > key (8-bit) </param>
// <returns></returns>
Public static string Encode (String str, string key)
{
Try
{
DESCryptoServiceProvider Provider = new DESCryptoServiceProvider ();
provider. Key = Encoding.ASCII.GetBytes (key. Substring (0, 8));
PROVIDER.IV = Encoding.ASCII.GetBytes (key. Substring (0, 8));
byte[] bytes = encoding.getencoding ("GB2312"). GetBytes (str);
MemoryStream ms = new MemoryStream ();
CryptoStream cs = new CryptoStream (MS, provider. CreateEncryptor (), cryptostreammode.write);
cs. Write (bytes, 0, bytes. Length);
cs. FlushFinalBlock ();
StringBuilder builder = new StringBuilder ();
foreach (Byte num in Ms. ToArray ())
{
Builder. AppendFormat ("{0:x2}", num);
}
Ms. Close ();
return builder. ToString ();
}
catch (Exception) {return ' xxxx ';}
}

// <summary>
// des decryption
// </summary>
/// <param name= "str" > String to Decrypt </param>
//<param name= "key" > key (8-bit) </param>
// <returns></returns>
Public static string Decode (String str, string key)
{
Try
{
DESCryptoServiceProvider Provider = new DESCryptoServiceProvider ();
provider. Key = Encoding.ASCII.GetBytes (key. Substring (0, 8));
PROVIDER.IV = Encoding.ASCII.GetBytes (key. Substring (0, 8));
byte[] buffer = new BYTE[STR. LENGTH/2];
for (int i = 0; i < str. LENGTH/2); i++)
{
int num2 = Convert.ToInt32 (str. Substring (i * 2, 2), 0x10);
Buffer[i] = (byte) num2;
}
MemoryStream ms = new MemoryStream ();
CryptoStream cs = new CryptoStream (MS, provider. CreateDecryptor (), cryptostreammode.write);
cs. Write (buffer, 0, buffer. Length);
cs. FlushFinalBlock ();
Ms. Close ();
return encoding.getencoding ("GB2312"). GetString (Ms. ToArray ());
}
catch (Exception) {return "";}
}

Standard DES encryption JAVA C # generic