private void WriteXtsHeader(AesXtsFileHeader header, string filePath, string keyPath)
{
Debug.Assert(PathTools.IsNormalized(filePath.AsSpan()));
Debug.Assert(PathTools.IsNormalized(keyPath.AsSpan()));
header.EncryptHeader(keyPath, KekSource, ValidationKey);
BaseFileSystem.OpenFile(out IFile file, filePath.ToU8Span(), OpenMode.ReadWrite);
using (file)
{
file.Write(0, header.ToBytes(false), WriteOption.Flush).ThrowIfFailure();
}
}
public PathParser(ReadOnlySpan <byte> path)
{
Debug.Assert(PathTools.IsNormalized(path));
if (path.Length < 1 || path[0] != '/')
{
throw new ArgumentException("Path must begin with a '/'");
}
_path = path;
_offset = 0;
_length = 0;
_finished = path.Length == 1;
}
private bool TryReadXtsHeader(string filePath, string keyPath, out AesXtsFileHeader header)
{
Debug.Assert(PathTools.IsNormalized(filePath.AsSpan()));
Debug.Assert(PathTools.IsNormalized(keyPath.AsSpan()));
header = null;
Result rc = BaseFileSystem.OpenFile(out IFile file, filePath.ToU8Span(), OpenMode.Read);
if (rc.IsFailure())
{
return(false);
}
using (file)
{
header = new AesXtsFileHeader(file);
return(header.TryDecryptHeader(keyPath, KekSource, ValidationKey));
}
}
