protected override void Dispose(bool disposing)
{
if (disposing)
{
_impl.Dispose();
}
}
public async Task <Stream> OpenReadAsync(CancellationToken ct)
{
Stream stream = null;
System.Security.Cryptography.Aes aes = null;
ICryptoTransform decryptor = null;
try
{
stream = await _fileInfo.OpenReadAsync(ct);
var header = await AesHeader.ReadAsync(stream, ct);
aes = CreateAes(header.Version);
var key = FileSystem.ComputeKey(header.IV, header.Version);
decryptor = CreateTransform(aes, key, header.IV, AesMode.Decrypt); // disposed by CryptoStream
return(new CryptoStream(stream, decryptor, CryptoStreamMode.Read));
}
catch
{
decryptor?.Dispose();
stream?.Dispose();
throw;
}
finally
{
aes?.Dispose();
}
}
private bool disposedValue = false; // To detect redundant calls
void Dispose(bool disposing)
{
if (!disposedValue)
{
if (disposing)
{
_cryptor.Dispose();
_cryptor = null;
}
// TODO: free unmanaged resources (unmanaged objects) and override a finalizer below.
// TODO: set large fields to null.
disposedValue = true;
}
}
