/// <summary> /// Reads a sequence of bytes from the current stream and advances the position within the stream by the number of /// bytes read. /// </summary> /// <returns> /// The total number of bytes read into the buffer. This can be less than the number of bytes requested if that /// many bytes are not currently available, or zero (0) if the end of the stream has been reached. /// </returns> /// <param name="buffer"> /// An array of bytes. When this method returns, the buffer contains the specified byte array with the /// values between <paramref name="offset" /> and (<paramref name="offset" /> + <paramref name="count" /> - 1) replaced /// by the bytes read from the current source. /// </param> /// <param name="offset"> /// The zero-based byte offset in <paramref name="buffer" /> at which to begin storing the data read /// from the current stream. /// </param> /// <param name="count">The maximum number of bytes to be read from the current stream.</param> public override int Read(byte[] buffer, int offset, int count) { ValidateSize(count); //get the current sector var currentSector = CurrentSector; //read the sector from the base stream var ret = base.Read(_tempBuffer, 0, count); if (ret == 0) { return(0); } if (_decryptor == null) { _decryptor = _xts.CreateDecryptor(); } //decrypt the sector var retV = _decryptor.TransformBlock(_tempBuffer, 0, ret, buffer, offset, currentSector); //Console.WriteLine("Decrypting sector {0} == {1} bytes", currentSector, retV); return(retV); }
public override int Read(byte[] buffer, int offset, int count) { ValidateSize(count); ulong currentSector = base.CurrentSector; int num = base.Read(_tempBuffer, 0, count); if (num == 0) { return(0); } if (_decryptor == null) { _decryptor = _xts.CreateDecryptor(); } return(_decryptor.TransformBlock(_tempBuffer, 0, num, buffer, offset, currentSector)); }