/// <summary>
/// Generic call to Win32.GetTokenInformation. The returned object contains the
/// token information in unmanaged heap (UnmanagedHeapAlloc).
/// It must be disposed by the caller.
/// </summary>
/// <param name="TokenInformationClass">The type of info to retrieve</param>
/// <returns>The ptr to the token information in unmanaged memory</returns>
private UnmanagedHeapAlloc GetTokenInformation(TokenInformationClass TokenInformationClass)
{
DWORD cbLength;
BOOL rc = Win32.GetTokenInformation(_handle, TokenInformationClass, IntPtr.Zero, 0, out cbLength);
switch (Marshal.GetLastWin32Error())
{
case Win32.SUCCESS:
throw new ArgumentException("Unexpected error code returned by GetTokenInformation");
case Win32.ERROR_BAD_LENGTH:
// Special case for TokenSessionId. Win32 doesn't want to return
// us the size of a DWORD.
cbLength = (DWORD)Marshal.SizeOf(typeof(DWORD));
goto case Win32.ERROR_INSUFFICIENT_BUFFER;
case Win32.ERROR_INSUFFICIENT_BUFFER:
UnmanagedHeapAlloc res = new UnmanagedHeapAlloc(cbLength);
try
{
rc = Win32.GetTokenInformation(_handle, TokenInformationClass, res.Ptr, res.Size, out cbLength);
Win32.CheckCall(rc);
}
catch
{
res.Dispose();
throw;
}
return(res);
default:
Win32.ThrowLastError();
return(null); // uneeded
}
}
internal TokenGroups(UnmanagedHeapAlloc ptr)
{
MemoryMarshaler m = new MemoryMarshaler(ptr.Ptr);
TOKEN_GROUPS grps = (TOKEN_GROUPS)m.ParseStruct(typeof(TOKEN_GROUPS));
for (int i = 0; i < grps.GroupCount; i++)
{
TokenGroup grp = new TokenGroup(m);
base.InnerList.Add(grp);
}
}
internal TokenPrivileges(UnmanagedHeapAlloc ptr)
{
MemoryMarshaler m = new MemoryMarshaler(ptr.Ptr);
TOKEN_PRIVILEGES privs = (TOKEN_PRIVILEGES)m.ParseStruct(typeof(TOKEN_PRIVILEGES));
for (int i = 0; i < privs.PrivilegeCount; i++)
{
TokenPrivilege priv = new TokenPrivilege(m);
base.InnerList.Add(priv);
}
}