/// <summary>
/// Configures the crypto container.
/// </summary>
/// <param name="cryptoContainer">The crypto container to configure.</param>
/// <param name="config">The configuration to use during encryption.</param>
public virtual void ConfigureCryptoContainer(RijndaelManaged cryptoContainer, SimpleAesEncryptionConfiguration config)
{
if (config == null)
{
throw new ArgumentNullException("config", "The whole encryption configuration is null. Have you forgotten to add it to the config section: " + ConfigurationSectionName);
}
if (config.EncryptionKey == null)
{
throw new ArgumentException("config", "The encryption key configuration is null. Have you forgotten to add it to the config section: " + ConfigurationSectionName);
}
if (string.IsNullOrWhiteSpace(config.EncryptionKey.Key))
{
throw new CryptographicException("Encryption key is missing. Have you forgotten to add it to the config section: " + ConfigurationSectionName);
}
if (!cryptoContainer.LegalKeySizes.Any(x => (x.MinSize <= config.EncryptionKey.KeySize) && (config.EncryptionKey.KeySize <= x.MaxSize)))
{
throw new CryptographicException("Invalid Key Size specified. The recommended value is: 256");
}
byte[] key = Convert.FromBase64String(config.EncryptionKey.Key);
// Check that the key length is equal to config.KeySize / 8
// e.g. 256/8 == 32 bytes expected for the key
if (key.Length != (config.EncryptionKey.KeySize / 8))
{
throw new CryptographicException("Encryption key is the wrong length. Please ensure that it is *EXACTLY* " + config.EncryptionKey.KeySize + " bits long");
}
cryptoContainer.Mode = config.CipherMode;
cryptoContainer.Padding = config.Padding;
cryptoContainer.KeySize = config.EncryptionKey.KeySize;
cryptoContainer.Key = key;
// Generate a new Unique IV for this container and transaction (can be overridden later to decrypt messages where the IV is known)
cryptoContainer.GenerateIV();
}
/// <summary>
/// Initializes a new instance of the <see cref="RijndaelMessageEncryptor"/> class.
/// </summary>
/// <param name="config">The configuration.</param>
public RijndaelMessageEncryptor(SimpleAesEncryptionConfiguration config)
: base(config)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="RijndaelMessageEncryptor"/> class.
/// </summary>
/// <param name="config">The configuration.</param>
public RijndaelMessageHandler(SimpleAesEncryptionConfiguration config)
{
Configuration = config;
}
