/// <summary>
/// Initializes a new instance of the <see cref="AuthenticatedEncryptionProvider"/> class used for encryption and decryption.
/// <param name="key">The <see cref="SecurityKey"/> that will be used for crypto operations.</param>
/// <param name="algorithm">The encryption algorithm to apply.</param>
/// <exception cref="ArgumentNullException">'key' is null.</exception>
/// <exception cref="ArgumentNullException">'algorithm' is null or whitespace.</exception>
/// <exception cref="ArgumentOutOfRangeException">key size is not large enough.</exception>
/// <exception cref="ArgumentException">'algorithm' is not supported.</exception>
/// <exception cref="ArgumentException">a symmetricSignatureProvider is not created.</exception>
/// </summary>
public AuthenticatedEncryptionProvider(SecurityKey key, string algorithm)
{
if (key == null)
{
throw LogHelper.LogArgumentNullException(nameof(key));
}
if (string.IsNullOrWhiteSpace(algorithm))
{
throw LogHelper.LogArgumentNullException(nameof(algorithm));
}
if (!IsSupportedAlgorithm(key, algorithm))
{
throw LogHelper.LogExceptionMessage(new ArgumentException(String.Format(CultureInfo.InvariantCulture, LogMessages.IDX10668, GetType(), algorithm, key)));
}
ValidateKeySize(key, algorithm);
_authenticatedkeys = GetAlgorithmParameters(key, algorithm);
_hashAlgorithm = GetHashAlgorithm(algorithm);
// TODO - should we defer and use CreateForSigning for encrypt, CreateForVerifying for decrypt?
_symmetricSignatureProvider = key.CryptoProviderFactory.CreateForSigning(_authenticatedkeys.HmacKey, _hashAlgorithm) as SymmetricSignatureProvider;
if (_symmetricSignatureProvider == null)
{
throw LogHelper.LogExceptionMessage(new ArgumentException(string.Format(CultureInfo.InvariantCulture, LogMessages.IDX10649, Algorithm)));
}
Key = key;
Algorithm = algorithm;
}
/// <summary>
/// Initializes a new instance of the <see cref="AuthenticatedEncryptionProvider"/> class used for encryption and decryption.
/// <param name="key">The <see cref="SecurityKey"/> that will be used for crypto operations.</param>
/// <param name="algorithm">The encryption algorithm to apply.</param>
/// <exception cref="ArgumentNullException">'key' is null.</exception>
/// <exception cref="ArgumentNullException">'algorithm' is null or whitespace.</exception>
/// <exception cref="ArgumentOutOfRangeException">key size is not large enough.</exception>
/// <exception cref="ArgumentException">'algorithm' is not supported.</exception>
/// <exception cref="ArgumentException">a symmetricSignatureProvider is not created.</exception>
/// </summary>
public AuthenticatedEncryptionProvider(SecurityKey key, string algorithm)
{
if (key == null)
{
throw LogHelper.LogArgumentNullException(nameof(key));
}
if (string.IsNullOrWhiteSpace(algorithm))
{
throw LogHelper.LogArgumentNullException(nameof(algorithm));
}
if (!IsSupportedAlgorithm(key, algorithm))
{
throw LogHelper.LogExceptionMessage(new ArgumentException(LogHelper.FormatInvariant(LogMessages.IDX10668, GetType(), algorithm, key)));
}
ValidateKeySize(key, algorithm);
_authenticatedkeys = GetAlgorithmParameters(key, algorithm);
_hmacAlgorithm = GetHmacAlgorithm(algorithm);
_symmetricSignatureProvider = key.CryptoProviderFactory.CreateForSigning(_authenticatedkeys.HmacKey, _hmacAlgorithm) as SymmetricSignatureProvider;
if (_symmetricSignatureProvider == null)
{
throw LogHelper.LogExceptionMessage(new ArgumentException(LogHelper.FormatInvariant(LogMessages.IDX10649, Algorithm)));
}
Key = key;
Algorithm = algorithm;
}
