/// <summary>
/// Creates a new stream
/// </summary>
/// <param name="baseStream">The base stream</param>
/// <param name="xts">The xts transform</param>
/// <param name="sectorSize">Sector size</param>
public XTSWriteOnlyStream(Stream baseStream, Xts xts, int sectorSize = DefaultSectorSize)
{
_baseStream = baseStream;
_encryptor = xts.CreateEncryptor();
_sectorSize = sectorSize;
_encriptedBuffer = new byte[sectorSize];
_sectorBuffer = new byte[sectorSize];
}
public XTSReadOnlyStream(Stream baseStream, Xts xts, int sectorSize, ulong startSector, int trimStart, uint trimEnd) : base(baseStream, xts, sectorSize)
{
_baseStream = baseStream;
_tempBuffer = new byte[SectorSize];
_decryptor = xts.CreateDecryptor();
_currentSector = startSector;
Length = baseStream.Length - trimStart - trimEnd;
if (trimStart > 0)
{
int read = ReadExactly(_baseStream, _tempBuffer, sectorSize);
_decryptor.TransformBlock(_tempBuffer, 0, SectorSize, _tempBuffer, 0, _currentSector);
_tempBufferCount = read;
_tempBufferPos = trimStart;
_currentSector++;
}
}
/// <summary>
/// Creates a new stream
/// </summary>
/// <param name="baseStream">The base stream</param>
/// <param name="xts">The xts transform</param>
/// <param name="sectorSize">Sector size</param>
/// <param name="offset">Offset to start counting sectors</param>
public XtsSectorStream(Stream baseStream, Xts xts, int sectorSize, long offset)
: base(baseStream, sectorSize, offset)
{
_xts = xts;
_tempBuffer = new byte[sectorSize];
}
/// <summary>
/// Creates a new stream
/// </summary>
/// <param name="baseStream">The base stream</param>
/// <param name="xts">The xts transform</param>
/// <param name="sectorSize">Sector size</param>
public XtsSectorStream(Stream baseStream, Xts xts, int sectorSize)
: this(baseStream, xts, sectorSize, 0)
{
}
/// <summary>
/// Creates a new stream with the default sector size
/// </summary>
/// <param name="baseStream">The base stream</param>
/// <param name="xts">The xts transform</param>
public XtsSectorStream(Stream baseStream, Xts xts)
: this(baseStream, xts, DefaultSectorSize)
{
}
/// <summary>
/// Creates a new stream
/// </summary>
/// <param name="baseStream">The base stream</param>
/// <param name="xts">Xts implementation to use</param>
/// <param name="sectorSize">Sector size</param>
/// <param name="offset">Offset to start counting sectors</param>
public XtsStream(Stream baseStream, Xts xts, int sectorSize, long offset)
: base(new XtsSectorStream(baseStream, xts, sectorSize, offset), true)
{
}
/// <summary>
/// Creates a new stream
/// </summary>
/// <param name="baseStream">The base stream</param>
/// <param name="xts">Xts implementation to use</param>
/// <param name="sectorSize">Sector size</param>
public XtsStream(Stream baseStream, Xts xts, int sectorSize)
: base(new XtsSectorStream(baseStream, xts, sectorSize), true)
{
}