Exemplo n.º 1
0
        public bool VerifyHmac()
        {
            using (Stream encryptedDataStream = CreateEncryptedDataStream())
            {
                encryptedDataStream.CopyTo(Stream.Null);
            }

            DocumentHeaders.Trailers(_reader);
            return(DocumentHeaders.HmacCalculator.Hmac == DocumentHeaders.Hmac);
        }
Exemplo n.º 2
0
        /// <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);
            }
        }