/// <inheritdoc />
public override bool TryDecrypt(ReadOnlySpan <byte> ciphertext, ReadOnlySpan <byte> nonce, Span <byte> plaintext, out int bytesWritten)
{
if (ciphertext.IsEmpty)
{
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.ciphertext);
}
if (nonce.IsEmpty)
{
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.nonce);
}
if (_disposed)
{
ThrowHelper.ThrowObjectDisposedException(GetType());
}
Aes aes = _aesPool.Get();
try
{
aes.IV = nonce.ToArray();
using (var decryptor = aes.CreateDecryptor())
{
bytesWritten = AesCbcHelper.Transform(decryptor, ciphertext, 0, ciphertext.Length, plaintext);
}
return(bytesWritten <= ciphertext.Length);
}
finally
{
_aesPool.Return(aes);
}
}
/// <inheritdoc />
public override void Encrypt(
ReadOnlySpan <byte> plaintext,
ReadOnlySpan <byte> nonce,
Span <byte> ciphertext)
{
if (_disposed)
{
ThrowHelper.ThrowObjectDisposedException(GetType());
}
byte[]? arrayToReturnToPool = null;
Aes aes = _aesPool.Get();
try
{
aes.IV = nonce.ToArray();
using ICryptoTransform encryptor = aes.CreateEncryptor();
AesCbcHelper.Transform(encryptor, plaintext, 0, plaintext.Length, ciphertext);
}
catch
{
CryptographicOperations.ZeroMemory(ciphertext);
throw;
}
finally
{
_aesPool.Return(aes);
if (arrayToReturnToPool != null)
{
ArrayPool <byte> .Shared.Return(arrayToReturnToPool);
}
}
}
