public bool VerifyHmac()
{
using (Stream encryptedDataStream = CreateEncryptedDataStream())
{
encryptedDataStream.CopyTo(Stream.Null);
}
DocumentHeaders.Trailers(_reader);
return(DocumentHeaders.HmacCalculator.Hmac == DocumentHeaders.Hmac);
}
/// <summary>
/// Decrypts the encrypted data to the given stream
/// </summary>
/// <param name="outputPlaintextStream">The resulting plain text stream.</param>
public void DecryptTo(Stream outputPlaintextStream)
{
if (outputPlaintextStream == null)
{
throw new ArgumentNullException("outputPlaintextStream");
}
if (!PassphraseIsValid)
{
throw new InternalErrorException("Passphrase is not valid!");
}
using (Stream encryptedDataStream = CreateEncryptedDataStream())
{
encryptedDataStream.DecryptTo(outputPlaintextStream, DocumentHeaders.DataCrypto().DecryptingTransform(), DocumentHeaders.IsCompressed);
}
DocumentHeaders.Trailers(_reader);
if (DocumentHeaders.HmacCalculator.Hmac != DocumentHeaders.Hmac)
{
throw new Axantum.AxCrypt.Core.Runtime.IncorrectDataException("HMAC validation error.", ErrorStatus.HmacValidationError);
}
}