I have made a little test case for test TripleDES using mono & ms.net and there are differences in the results.
The test case is based on a piece of code from my TLS Library ( that as i said some time ago is working well under Windows with MS.NET but not with Mono on Linux ):
Output of the test case using MS.NET:
9c99568e753e02955b5c468bcff82721535f3dd81695823d889b9a47da979086500e48eee79b2541 1400000cb58608e6b94b1381658e76be 2a94e53ab9f99a839d4fb0a88f470076050a5f08
Output of the Test case using Mono 0.28 (Windows)
9c99568e753e02955b5c468bcff82721535f3dd81695823d889b9a47da9790868f3e78b6ef624695 1400000cb58608e6b94b1381 658e76be2a94e53ab9f99a839d4fb0a88f470076
Output of the Test case using Mono 0.28 (Linux Red Hat 8)
9c99568e753e02955b5c468bcff82721535f3dd81695823d889b9a47da9790868f3e78b6ef624695 1400000cb58608e6b94b1381 658e76be2a94e53ab9f99a839d4fb0a88f470076
Output of the case using the exe built with mono 0.28 and the MS .NET runtime ( runnig test.exe directly in the console seems to be using the MS.NET framework )
9c99568e753e02955b5c468bcff82721535f3dd81695823d889b9a47da979086500e48eee79b2541 1400000cb58608e6b94b1381658e76be 2a94e53ab9f99a839d4fb0a88f470076050a5f08
If anybody can confirm this i will fill a bug report in mono bugzilla.
The test case source code is attached to this email.
-- Best regards
Carlos Guzm�n �lvarez Vigo-Spain
"Todos somos muy ignorantes. Lo que ocurre es que no todos ignoramos las mismas cosas."
Albert Einstein.
using System; using System.IO; using System.Security.Cryptography;
namespace TripleDESTest
{
class TripleDES
{
[STAThread]
static void Main(string[] args)
{
byte blockSize = 8;
string algName = "3DES";
byte keyMaterialSize = 24;
byte hashSize = 20;
CipherMode cipherMode = CipherMode.CBC;
SymmetricAlgorithm encryptionAlgorithm =
SymmetricAlgorithm.Create(algName);
// Configure encrypt algorithm
encryptionAlgorithm.Mode = cipherMode;
encryptionAlgorithm.Padding = PaddingMode.PKCS7;
encryptionAlgorithm.KeySize = keyMaterialSize * 8;
encryptionAlgorithm.BlockSize = blockSize * 8;
byte[] clientWriteKey = new byte[]{161, 54, 179, 213, 89,
75, 130, 4, 186, 99, 158, 127, 19, 195, 175, 143, 79, 109, 25, 202, 237, 235, 62, 170};
byte[] clientWriteIV = new byte[]{193, 227, 54, 132, 68,
172, 55, 91};
// Set the key and IV for the algorithm
encryptionAlgorithm.Key = clientWriteKey;
encryptionAlgorithm.IV = clientWriteIV;
// Create encryption cipher
ICryptoTransform encryptionCipher =
encryptionAlgorithm.CreateEncryptor();
byte[] fragment = new byte[]{20, 0, 0, 12, 181, 134, 8, 230,
185, 75, 19, 129, 101, 142, 118, 190};
byte[] mac = new byte[]{42, 148, 229, 58, 185,
249, 154, 131, 157, 79, 176, 168, 143, 71, 0, 118, 5, 10, 95, 8};
// Encryption ( fragment + mac [+ padding + padding_length] )
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, encryptionCipher,
CryptoStreamMode.Write);
cs.Write(fragment, 0, fragment.Length);
cs.Write(mac, 0, mac.Length);
if (cipherMode == CipherMode.CBC)
{
// Calculate padding_length
int fragmentLength = fragment.Length + mac.Length
+ 1;
int padding =
(((fragmentLength/blockSize)*8) + blockSize) - fragmentLength;
// Write padding length byte
cs.WriteByte((byte)padding);
}
cs.Close();
// Show result
TripleDES.Print(ms.ToArray());
// Now decrypt result
// Create decryption cipher
encryptionAlgorithm.Padding = PaddingMode.None;
ICryptoTransform decryptionCipher =
encryptionAlgorithm.CreateDecryptor();
int fragmentSize = 0;
int paddingLength = 0;
byte[] ecrFragment = ms.ToArray();
// Decrypt message fragment ( fragment + mac [+ padding +
padding_length] )
byte[] buffer = new byte[ecrFragment.Length];
decryptionCipher.TransformBlock(ecrFragment, 0,
ecrFragment.Length, buffer, 0);
// Calculate fragment size
if (cipherMode == CipherMode.CBC)
{
// Calculate padding_length
paddingLength = buffer[buffer.Length - 1];
for (int i = (buffer.Length - 1); i > (buffer.Length -
(paddingLength + 1)); i--)
{
if (buffer[i] != paddingLength)
{
paddingLength = 0;
break;
}
}
fragmentSize = (buffer.Length - (paddingLength + 1)) -
hashSize;
}
else
{
fragmentSize = buffer.Length - hashSize;
}
byte[] dcrFragment = new byte[fragmentSize];
byte[] dcrMAC = new byte[hashSize];
Buffer.BlockCopy(buffer, 0, dcrFragment, 0,
dcrFragment.Length);
Buffer.BlockCopy(buffer, dcrFragment.Length, dcrMAC, 0,
dcrMAC.Length);
TripleDES.Print(dcrFragment);
TripleDES.Print(dcrMAC);
Console.WriteLine("Pulse una tecla para continuar....");
Console.ReadLine();
}
public static void Print(byte[] content)
{
for (int i = 0; i < content.Length; i++)
{
Console.Write("{0}", content[i].ToString("x2"));
}
Console.WriteLine();
}
}
}
