static void TestSwitchOAEP()
{
// Arrange
RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
byte[] authKey = new byte[16];
rng.GetBytes(authKey);
byte[] message = new byte[1];
rng.GetBytes(message);
Console.WriteLine("Message was " + Environment.NewLine + ByteArrayToString(message) + " (length=" + message.Length + ")");
SwitchOAEP sc = new SwitchOAEP();
sc.AuthenticationKey = authKey;
// Act
byte[] ciphertext = sc.CreateEncryptor().TransformFinalBlock(message, 0, message.Length);
Console.WriteLine("Ciphertext was ");
Console.WriteLine("Etm: " + ByteArrayToString(ciphertext, 0, 32));
Console.WriteLine("MAC seed: " + ByteArrayToString(ciphertext, 32, 16));
Console.WriteLine("MAC bits: " + ByteArrayToString(ciphertext, 48, 16));
Console.WriteLine("Swapped Encoded Msg: " + ByteArrayToString(ciphertext, 64, ciphertext.Length - 64));
Console.WriteLine("Ciphertext length: " + ciphertext.Length);
byte[] plaintext = sc.CreateDecryptor().TransformFinalBlock(ciphertext, 0, ciphertext.Length);
Console.WriteLine("Plantext was" + Environment.NewLine + ByteArrayToString(plaintext) + " (length=" + plaintext.Length + ")");
bool equal = plaintext.SequenceEqual(message);
Console.WriteLine(Environment.NewLine + "Plaintext " + (equal ? "was" : "was NOT") + " equal to the message");
}
private void EncryptDecryptMsgLengthTest(int messageLength)
{
// Arrange
RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
SwitchOAEP sc = new SwitchOAEP();
byte[] authKey = new byte[16];
rng.GetBytes(authKey);
byte[] message = new byte[messageLength];
rng.GetBytes(message);
sc.AuthenticationKey = authKey;
// Act
byte[] ciphertext = new byte[0];
byte[] plaintext = new byte[0];
try
{
// Act
ciphertext = sc.CreateEncryptor().TransformFinalBlock(message, 0, message.Length);
plaintext = sc.CreateDecryptor().TransformFinalBlock(ciphertext, 0, ciphertext.Length);
// Assert
CollectionAssert.AreEqual(message, plaintext,
"Message was " + Environment.NewLine + Helper.ByteArrayToString(message) + " (length=" + message.Length + ")" +
Environment.NewLine + "Ciphertext was " + Environment.NewLine + Helper.ByteArrayToString(ciphertext) + " (length=" + ciphertext.Length + ")" +
Environment.NewLine + "Plantext was" + Environment.NewLine + Helper.ByteArrayToString(plaintext) + " (length=" + plaintext.Length + ")");
}
catch (Exception e)
{
Assert.Fail("Exception: " + e.ToString() + Environment.NewLine +
"Message was " + Environment.NewLine + Helper.ByteArrayToString(message) + " (length=" + message.Length + ")" +
Environment.NewLine + "Ciphertext was " + Environment.NewLine + Helper.ByteArrayToString(ciphertext) + " (length=" + ciphertext.Length + ")" +
Environment.NewLine + "Plantext was" + Environment.NewLine + Helper.ByteArrayToString(plaintext) + " (length=" + plaintext.Length + ")");
}
}
