private void SaveData(IStream stream)
{
// Create a memory buffer and write the strings there
using (var buffer = new MemoryStream())
using (var bufferWriter = new EndianWriter(buffer, stream.Endianness))
{
// Write the strings to the buffer
foreach (string str in _strings)
{
if (str != null)
{
bufferWriter.WriteAscii(str);
}
}
// Align the buffer's length if encryption is necessary
if (_key != null)
{
buffer.SetLength(AES.AlignSize((int)buffer.Length));
}
byte[] data = buffer.ToArray();
// Encrypt the buffer if necessary
if (_key != null)
{
data = AES.Encrypt(data, 0, (int)buffer.Length, _key.Key, _key.IV);
}
// Resize the data area and write it in
_data.Resize((int)buffer.Length, stream);
stream.SeekTo(_data.Offset);
stream.WriteBlock(data, 0, (int)buffer.Length);
}
}
private IReader DecryptData(IReader reader, FileSegment dataLocation, AESKey key)
{
reader.SeekTo(dataLocation.Offset);
byte[] data = reader.ReadBlock(AES.AlignSize(dataLocation.Size));
if (key != null)
{
data = AES.Decrypt(data, key.Key, key.IV);
}
return(new EndianReader(new MemoryStream(data), Endian.BigEndian));
}