/// <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; }