public void SymmetricAlgorithmVerifierNegativeThreadingTest()
{
// Synchronization state
object lockCheckParameter = new object();
SymmetricAlgorithm encryptorInstance = null;
bool lockChecked = false;
SymmetricAlgorithmDiagnosticOptions diagnosticOptions = new SymmetricAlgorithmDiagnosticOptions
{
CheckThreadSafety = true,
LockCheckParameter = lockCheckParameter,
LockCheckCallback = delegate(CryptographyLockContext <SymmetricAlgorithm> lockCheck)
{
Assert.AreSame(lockCheck.Parameter, lockCheckParameter, "Unexpected lock check parameter");
Assert.AreSame(lockCheck.Algorithm, encryptorInstance, "Unexpected algorithm check parameter");
lockChecked = true;
return(false);
}
};
// Encryption state
bool encryptionSucceeded = true;
Exception encryptionException = null;
try
{
encryptorInstance = new AesManaged();
SymmetricAlgorithm encryptor = encryptorInstance.EnableLogging(diagnosticOptions);
// Thread to do the encryption
Thread encryptionThread = new Thread(delegate()
{
try
{
using (MemoryStream ms = new MemoryStream())
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
{
byte[] plainText = Encoding.UTF8.GetBytes("Secret round trip message");
cs.Write(plainText, 0, plainText.Length);
cs.FlushFinalBlock();
}
encryptionSucceeded = true;
}
catch (Exception e)
{
encryptionException = e;
encryptionSucceeded = false;
}
});
encryptionThread.Start();
encryptionThread.Join();
}
finally
{
if (encryptorInstance != null)
{
(encryptorInstance as IDisposable).Dispose();
}
}
// Verify that our lock check was called, that we failed encryption, and that we got the correct exception
Assert.IsTrue(lockChecked, "Lock check callback was not performed");
Assert.IsFalse(encryptionSucceeded, "Encryption should not have succeeded");
Assert.IsInstanceOfType(encryptionException, typeof(CryptographicDiagnosticException), "Did not get expected exception");
}