internal static byte[] DecryptSymmetric(string symmetricInstance, byte[] ciphertext, ConfigurationContext context)
{
ArgumentValidation.CheckForNullReference(symmetricInstance, "symmetricInstance");
ArgumentValidation.CheckForEmptyString(symmetricInstance, "symmetricInstance");
SymmetricCryptoProviderFactory factory = new SymmetricCryptoProviderFactory(context);
ISymmetricCryptoProvider symmetricProvider = factory.CreateSymmetricCryptoProvider(symmetricInstance);
return(symmetricProvider.Decrypt(ciphertext));
}
/// <summary>
/// Decrypts a cipher text using a specified symmetric cryptography provider.
/// </summary>
/// <param name="symmetricInstance">A symmetric instance from configuration.</param>
/// <param name="ciphertext">The cipher text for which you want to decrypt.</param>
/// <returns>The resulting plain text.</returns>
public static byte[] DecryptSymmetric(string symmetricInstance, byte[] ciphertext)
{
if (string.IsNullOrEmpty(symmetricInstance))
{
throw new ArgumentException(Resources.ExceptionNullOrEmptyString, "symmetricInstance");
}
try
{
SymmetricCryptoProviderFactory factory = new SymmetricCryptoProviderFactory(ConfigurationSourceFactory.Create());
ISymmetricCryptoProvider symmetricProvider = factory.Create(symmetricInstance);
return(symmetricProvider.Decrypt(ciphertext));
}
catch (ConfigurationErrorsException configurationException)
{
TryLogSymmetricConfigurationError(configurationException, symmetricInstance);
throw;
}
}
/// <summary>
/// Decrypts a cipher text using a specified symmetric cryptography provider.
/// </summary>
/// <param name="symmetricInstance">A symmetric instance from configuration.</param>
/// <param name="ciphertext">The cipher text for which you want to decrypt.</param>
/// <returns>The resulting plain text.</returns>
public static byte[] DecryptSymmetric(string symmetricInstance, byte[] ciphertext)
{
if (string.IsNullOrEmpty(symmetricInstance)) throw new ArgumentException(Resources.ExceptionNullOrEmptyString, "symmetricInstance");
try
{
SymmetricCryptoProviderFactory factory = new SymmetricCryptoProviderFactory(ConfigurationSourceFactory.Create());
ISymmetricCryptoProvider symmetricProvider = factory.Create(symmetricInstance);
return symmetricProvider.Decrypt(ciphertext);
}
catch (ConfigurationErrorsException configurationException)
{
TryLogSymmetricConfigurationError(configurationException, symmetricInstance);
throw;
}
}
internal static byte[] EncryptSymmetric(string symmetricInstance, byte[] plaintext, ConfigurationContext context)
{
ArgumentValidation.CheckForNullReference(symmetricInstance, "symmetricInstance");
ArgumentValidation.CheckForEmptyString(symmetricInstance, "symmetricInstance");
SymmetricCryptoProviderFactory factory = new SymmetricCryptoProviderFactory(context);
ISymmetricCryptoProvider symmetricProvider = factory.CreateSymmetricCryptoProvider(symmetricInstance);
return symmetricProvider.Encrypt(plaintext);
}
private ISymmetricCryptoProvider CreateProvider()
{
SymmetricCryptoProviderFactory factory = new SymmetricCryptoProviderFactory(cachingConfigurationView.ConfigurationContext);
SymmetricStorageEncryptionProviderData data = (SymmetricStorageEncryptionProviderData) cachingConfigurationView.GetStorageEncryptionProviderData(ConfigurationName);
return factory.CreateSymmetricCryptoProvider(data.SymmetricInstance);
}
