public SdsEntry(uint hash, uint id, ulong offset, uint size, SkSecurityDescriptor sk, ulong fileOffset)
{
_hash = hash;
Id = id;
Offset = offset;
Size = size;
SecurityDescriptor = sk;
FileOffset = fileOffset;
}
public Sds(Stream fileStream)
{
uint index = 0x0;
var logger = LogManager.GetLogger("SDS");
SdsEntries = new List <SdsEntry>();
var rawBytes = new byte[fileStream.Length];
fileStream.Read(rawBytes, 0, (int)fileStream.Length);
var loopCatch = 0;
while (index < rawBytes.Length)
{
if (index + 16 > rawBytes.Length)
{
//out of data
break;
}
var hash = BitConverter.ToUInt32(rawBytes, (int)index);
var id = BitConverter.ToUInt32(rawBytes, (int)index + 4);
var offset = BitConverter.ToUInt64(rawBytes, (int)index + 4 + 4);
var size = BitConverter.ToUInt32(rawBytes, (int)index + 4 + 4 + 8);
if (index == LastOffset && hash == 0x0 && id == 0x0 && offset == 0x0 && size == 0x0)
{
//nothing here, go to next page
index += 0x40000;
continue;
}
LastOffset = index;
logger.Debug($"LastOffset is 0x{LastOffset}");
if ((offset == 0 && size == 0) || offset > (ulong)rawBytes.Length)
{
//end of page, so get to start of next section
while (index % 0x40000 != 0)
{
index += 1;
}
continue;
}
if (id > 0 && offset < (ulong)rawBytes.Length) //size < 0x2000
{
logger.Debug(
$"Starting index: 0x{LastOffset:X} Offset 0x{offset:X} Hash: 0x{hash:X} id: {id} size 0x{size:X}");
var dataSize = size - 0x14;
if (dataSize > rawBytes.Length - (int)LastOffset)
{
break;
}
var buff = new byte[dataSize];
Buffer.BlockCopy(rawBytes, (int)(offset + 0x14), buff, 0, (int)dataSize);
var sk = new SkSecurityDescriptor(buff);
logger.Trace(sk);
var sde = new SdsEntry(hash, id, offset, size, sk, LastOffset);
SdsEntries.Add(sde);
}
if (size == 0)
{
size = 16;
}
index += size;
//padding calculation
while (index % 16 != 0)
{
index += 1;
}
}
}
