// InitializationVector for 3DES.
public static Byte[] CalculateIV(UInt32 Seed)
{
HashAlgorithm hash = new Tiger();
return hash.ComputeHash(BitConverter.GetBytes(Seed));
}
public byte[] HashRange(VIRTUAL_ADDRESS KEY, PFN VALUE)
{
var rv = new byte[1];
var block = new long[0x200]; // 0x200 * 8 = 4k
var bpage = new byte[0x1000];
var tigger = new Tiger();
tigger.Initialize();
//fixed (void* lp = block, bp = bpage)
//{
if (DiagOutput)
WriteColor(VALUE.PTE.Valid ? ConsoleColor.Cyan : ConsoleColor.Red, $"VA: {KEY:X12} \t PFN: {VALUE.PTE}");
// if we have invalid (software managed) page table entries
// the data may be present, or a prototype or actually in swap.
// for the moment were only going to dump hardware managed data
// or feel free to patch this up ;)
if (!VALUE.PTE.Valid)
return rv;
if (VALUE.PTE.LargePage)
{
bool GoodRead = false;
// 0x200 * 4kb = 2MB
for (int i = 0; i < 0x200; i++)
{
MemAccess.GetPageForPhysAddr(VALUE.PTE, ref block, ref GoodRead);
VALUE.PTE.PTE += 0x1000;
if (!GoodRead)
block = new long[0x200];
Buffer.BlockCopy(block, 0, bpage, 0, 4096);
rv = tigger.ComputeHash(bpage);
}
return rv;
}
else
{
try { MemAccess.GetPageForPhysAddr(VALUE.PTE, ref block); } catch (Exception ex) { }
if (block != null)
{
Buffer.BlockCopy(block, 0, bpage, 0, 4096);
rv = tigger.ComputeHash(bpage);
}
}
return rv;
}
