/// <summary>
/// Create an AuthenticatedSymmetricAlgorithm which logs the encryption operation of the input
/// algorithm, but does not monitor for thread safe access to the object.
/// </summary>
public static AuthenticatedSymmetricAlgorithm EnableLogging(this AuthenticatedSymmetricAlgorithm loggedAlgorithm)
{
return(loggedAlgorithm.EnableLogging(new SymmetricAlgorithmDiagnosticOptions()
{
CheckThreadSafety = false
}));
}
/// <summary>
/// Create a SymmetricAlgorithm which logs the encryption operation of the input algorithm
/// </summary>
public static SymmetricAlgorithm EnableLogging(this SymmetricAlgorithm loggedAlgorithm,
SymmetricAlgorithmDiagnosticOptions options)
{
if (options == null)
{
throw new ArgumentNullException("options");
}
#if !FXONLY_BUILD
AuthenticatedSymmetricAlgorithm authenticatedLoggedAlgorithm =
loggedAlgorithm as AuthenticatedSymmetricAlgorithm;
if (authenticatedLoggedAlgorithm != null)
{
return(new AuthenticatedSymmetricAlgorithmLogger(authenticatedLoggedAlgorithm,
options.CheckThreadSafety ? options.LockCheckCallback : null,
options.CheckThreadSafety ? options.LockCheckParameter : null));
}
else
#endif // !FXONLY_BUILD
{
return(new SymmetricAlgorithmLogger(loggedAlgorithm,
options.CheckThreadSafety ? options.LockCheckCallback : null,
options.CheckThreadSafety ? options.LockCheckParameter : null));
}
}
/// <summary>
/// Create an AuthenticatedSymmetricAlgorithm which verifies the decryption operations done on it
/// have state which matches captured encryption state. This overload does not monitor for thread
/// safe access to the object.
/// </summary>
public static AuthenticatedSymmetricAlgorithm EnableDecryptionVerification(this AuthenticatedSymmetricAlgorithm loggedAlgorithm,
AuthenticatedSymmetricEncryptionState encryptionState)
{
return(loggedAlgorithm.EnableDecryptionVerification(encryptionState,
new SymmetricAlgorithmDiagnosticOptions()
{
CheckThreadSafety = false
}));
}
public static AuthenticatedSymmetricAlgorithm EnableLogging(this AuthenticatedSymmetricAlgorithm loggedAlgorithm,
SymmetricAlgorithmDiagnosticOptions options)
{
AuthenticatedSymmetricAlgorithm wrappedAlgorithm =
(loggedAlgorithm as SymmetricAlgorithm).EnableLogging(options) as AuthenticatedSymmetricAlgorithm;
Debug.Assert(wrappedAlgorithm != null, "Logged authenticated algorithm did not wrap into an authenticated algortihm");
return(wrappedAlgorithm);
}
internal AuthenticatedSymmetricAlgorithmVerifier(AuthenticatedSymmetricAlgorithm verificationAlgorithm,
AuthenticatedSymmetricEncryptionState encryptionState,
Predicate <CryptographyLockContext <SymmetricAlgorithm> > lockCheckCallback,
object lockCheckParameter)
: base(verificationAlgorithm, lockCheckCallback, lockCheckParameter)
{
Debug.Assert(encryptionState != null, "encryptionState != null");
m_encryptionState = encryptionState;
}
public static AuthenticatedSymmetricAlgorithm EnableDecryptionVerification(this AuthenticatedSymmetricAlgorithm loggedAlgorithm,
AuthenticatedSymmetricEncryptionState encryptionState,
SymmetricAlgorithmDiagnosticOptions options)
{
AuthenticatedSymmetricAlgorithm wrappedAlgorithm =
(loggedAlgorithm as SymmetricAlgorithm).EnableDecryptionVerification(encryptionState, options) as AuthenticatedSymmetricAlgorithm;
Debug.Assert(wrappedAlgorithm != null, "Logged authenticated algorithm did not wrap into an authenticated algortihm");
return(wrappedAlgorithm);
}
/// <summary>
/// Get the last encryption state from an algorithm logged with an AuthenticatedSymmetricAlgorithmLogger.
/// </summary>
public static AuthenticatedSymmetricEncryptionState GetLastEncryptionState(this AuthenticatedSymmetricAlgorithm loggedAlgorithm)
{
AuthenticatedSymmetricAlgorithmLogger logger = loggedAlgorithm as AuthenticatedSymmetricAlgorithmLogger;
if (logger == null)
{
throw new InvalidOperationException(Properties.Resources.EncryptionStateRequiresSymetricAlgorithmLogger);
}
return(logger.LastEncryptionState);
}
internal AuthenticatedSymmetricAlgorithmShim(AuthenticatedSymmetricAlgorithm wrappedAlgorithm,
Predicate <CryptographyLockContext <SymmetricAlgorithm> > lockCheckCallback,
object lockCheckParameter)
{
Debug.Assert(wrappedAlgorithm != null, "wrappedAlgorithm != null");
m_wrappedAlgorithm = wrappedAlgorithm;
if (lockCheckCallback != null)
{
m_lockCheckCallback = lockCheckCallback;
m_lockCheckContext = new CryptographyLockContext <SymmetricAlgorithm>(m_wrappedAlgorithm, lockCheckParameter);
}
}
/// <summary>
/// Create a SymmetricAlgorithm which verifies the decryption operations done on it have state
/// which matches captured encryption state.
/// </summary>
public static SymmetricAlgorithm EnableDecryptionVerification(this SymmetricAlgorithm loggedAlgorithm,
SymmetricEncryptionState encryptionState,
SymmetricAlgorithmDiagnosticOptions options)
{
if (encryptionState == null)
{
throw new ArgumentNullException("encryptionState");
}
if (options == null)
{
throw new ArgumentNullException("options");
}
#if !FXONLY_BUILD
AuthenticatedSymmetricAlgorithm authenticatedLoggedAlgorithm =
loggedAlgorithm as AuthenticatedSymmetricAlgorithm;
if (authenticatedLoggedAlgorithm != null)
{
AuthenticatedSymmetricEncryptionState authenticatedEncryptionState =
encryptionState as AuthenticatedSymmetricEncryptionState;
if (authenticatedEncryptionState == null)
{
throw new ArgumentException(Resources.NeedAuthenticatedEncryptionState, "encryptionState");
}
return(new AuthenticatedSymmetricAlgorithmVerifier(authenticatedLoggedAlgorithm,
authenticatedEncryptionState,
options.CheckThreadSafety ? options.LockCheckCallback : null,
options.CheckThreadSafety ? options.LockCheckParameter : null));
}
else
#endif // !FXONLY_BUILD
{
return(new SymmetricAlgorithmVerifier(loggedAlgorithm,
encryptionState,
options.CheckThreadSafety ? options.LockCheckCallback : null,
options.CheckThreadSafety ? options.LockCheckParameter : null));
}
}
/// <summary>
/// Capture the parameters used for encryption, and verify that they make sense together
/// </summary>
internal AuthenticatedSymmetricEncryptionState(byte[] key,
byte[] iv,
byte[] authenticatedData,
AuthenticatedSymmetricAlgorithm algorithm)
: base(key, iv, algorithm, typeof(AuthenticatedSymmetricAlgorithm), false)
{
if (authenticatedData != null)
{
m_authenticatedData = new byte[authenticatedData.Length];
Array.Copy(authenticatedData, m_authenticatedData, m_authenticatedData.Length);
}
// Since CipherMode doesn't contain authenticated encryption modes, it's not very useful for
// debugging mode mismatches in authenticated symmetric algorithms. Our only current
// authenticated symmetric algorithm implementations ues CNG chaining modes, so we'll grab that
// if it's available to aid in debugging.
ICngSymmetricAlgorithm cngAlgorithm = algorithm as ICngSymmetricAlgorithm;
if (cngAlgorithm != null)
{
m_cngChainingMode = cngAlgorithm.CngMode;
}
}
internal AuthenticatedSymmetricAlgorithmLogger(AuthenticatedSymmetricAlgorithm wrappedAlgorithm,
Predicate <CryptographyLockContext <SymmetricAlgorithm> > lockCheckCallback,
object lockCheckParameter)
: base(wrappedAlgorithm, lockCheckCallback, lockCheckParameter)
{
}
