/// <summary>
/// Creates an Encryptor instance initialized with the specified SEALContext,
/// public key, and/or secret key.
/// </summary>
/// <param name="context">The SEALContext</param>
/// <param name="publicKey">The public key</param>
/// <param name="secretKey">The secret key</param>
/// <exception cref="ArgumentNullException">if context is null</exception>
/// <exception cref="ArgumentException">if the encryption parameters are not valid</exception>
/// <exception cref="ArgumentException">if publicKey is not valid</exception>
/// <exception cref="ArgumentException">if secretKey is not null and not valid</exception>
public Encryptor(SEALContext context, PublicKey publicKey, SecretKey secretKey = null)
{
if (null == context)
{
throw new ArgumentNullException(nameof(context));
}
if (!context.ParametersSet)
{
throw new ArgumentException("Encryption parameters are not set correctly");
}
if (!ValCheck.IsValidFor(publicKey, context))
{
throw new ArgumentException("Public key is not valid for encryption parameters");
}
if (null == secretKey)
{
NativeMethods.Encryptor_Create(
context.NativePtr, publicKey.NativePtr, IntPtr.Zero, out IntPtr ptr);
NativePtr = ptr;
}
else
{
if (!ValCheck.IsValidFor(secretKey, context))
{
throw new ArgumentException("Secret key is not valid for encryption parameters");
}
NativeMethods.Encryptor_Create(
context.NativePtr, publicKey.NativePtr, secretKey.NativePtr, out IntPtr ptr);
NativePtr = ptr;
}
}
/// <summary>
/// Loads a SecretKey from an input stream overwriting the current SecretKey.
/// The loaded SecretKey is verified to be valid for the given SEALContext.
/// </summary>
/// <param name="context">The SEALContext</param>
/// <param name="stream">The stream to load the SecretKey from</param>
/// <exception cref="ArgumentNullException">if stream is null</exception>
/// <exception cref="ArgumentException">if the context is not set or encryption
/// parameters are not valid</exception>
/// <exception cref="ArgumentException">if SecretKey could not be read from
/// stream or is invalid for the context</exception>
public void Load(SEALContext context, Stream stream)
{
if (null == context)
{
throw new ArgumentNullException(nameof(context));
}
if (null == stream)
{
throw new ArgumentNullException(nameof(stream));
}
UnsafeLoad(stream);
if (!ValCheck.IsValidFor(this, context))
{
throw new ArgumentException("SecretKey data is invalid for context");
}
}