private static Icon LoadIconFromResource(UIntPtr lpIconName) { HandleRef hmodule = new HandleRef(null, GetModuleHandle(null)); uint totalsize; RESOURCE_ICONDIRENTRY[] entries; SafeResourceBuffer[] entrybuffers; RESOURCE_ICONDIR dir; using (SafeResourceBuffer buffer = GetResourceBuffer(hmodule, lpIconName, MAKEINTRESOURCE(RT_GROUP_ICON))) { dir = buffer.Read <RESOURCE_ICONDIR>(0); if (dir.idReserved != 0 || dir.idType != IMAGE_ICON || dir.idCount == 0) { throw new InvalidDataException("There is no icon directory in resource data."); } entries = new RESOURCE_ICONDIRENTRY[dir.idCount]; entrybuffers = new SafeResourceBuffer[dir.idCount]; uint entrysize = (uint)Marshal.SizeOf(typeof(RESOURCE_ICONDIRENTRY)); ulong offset = (uint)Marshal.SizeOf(typeof(RESOURCE_ICONDIR)) - entrysize; totalsize = (uint)(Marshal.SizeOf(typeof(ICONDIR)) + (Marshal.SizeOf(typeof(ICONDIRENTRY)) * (dir.idCount - 1))); entries[0] = dir.idEntries; for (int i = 0; i < dir.idCount; i++, offset += entrysize) { if (i > 0) { entries[i] = buffer.Read <RESOURCE_ICONDIRENTRY>(offset); } uint iconsize = entries[i].dwBytesInRes; SafeResourceBuffer entrybuffer = GetResourceBuffer(hmodule, MAKEINTRESOURCE(entries[i].nID), MAKEINTRESOURCE(RT_ICON)); if (iconsize != entrybuffer.ByteLength) { throw new InvalidDataException("Reported resource size is not equal to the icon size."); } entrybuffers[i] = entrybuffer; totalsize += iconsize; } } using (SafeLocalAllocHandle iconbuffer = SafeLocalAlloc(LMEM_ZEROINIT | LMEM_FIXED, totalsize)) { using (UnmanagedMemoryStream outstream = iconbuffer.ToStream(FileAccess.ReadWrite)) { ICONDIR icondir = new ICONDIR(dir); iconbuffer.Write(0, icondir); uint iconoffset = icondir.idEntries.dwImageOffset; outstream.Position = iconoffset; uint entrysize = (uint)Marshal.SizeOf(typeof(ICONDIRENTRY)); ulong offset = (uint)Marshal.SizeOf(typeof(ICONDIR)); ICONDIRENTRY entry = icondir.idEntries; for (int i = 0; i < dir.idCount; i++, offset += entrysize) { if (i > 0) { entry = new ICONDIRENTRY(entries[i], iconoffset); iconbuffer.Write(offset, entry); } using (UnmanagedMemoryStream instream = entrybuffers[i].ToStream()) { instream.CopyTo(outstream); } if (outstream.Position != (iconoffset + entry.dwBytesInRes)) { throw new InvalidOperationException(); } iconoffset += entry.dwBytesInRes; } outstream.Position = 0; return(new Icon(outstream)); } } }
private static unsafe SafeTokenHandle KerbS4ULogon(string upn, ref SafeTokenHandle safeTokenHandle) { SafeTokenHandle handle6; byte[] array = new byte[] { 0x43, 0x4c, 0x52 }; IntPtr sizetdwBytes = new IntPtr((long)((ulong)(array.Length + 1))); using (SafeLocalAllocHandle handle = Win32Native.LocalAlloc(0x40, sizetdwBytes)) { if ((handle == null) || handle.IsInvalid) { throw new OutOfMemoryException(); } handle.Initialize((ulong)(array.Length + 1L)); handle.WriteArray <byte>(0L, array, 0, array.Length); Win32Native.UNICODE_INTPTR_STRING logonProcessName = new Win32Native.UNICODE_INTPTR_STRING(array.Length, handle); SafeLsaLogonProcessHandle invalidHandle = SafeLsaLogonProcessHandle.InvalidHandle; SafeLsaReturnBufferHandle profileBuffer = SafeLsaReturnBufferHandle.InvalidHandle; try { int num; Privilege privilege = null; RuntimeHelpers.PrepareConstrainedRegions(); try { try { privilege = new Privilege("SeTcbPrivilege"); privilege.Enable(); } catch (PrivilegeNotHeldException) { } IntPtr zero = IntPtr.Zero; num = Win32Native.LsaRegisterLogonProcess(ref logonProcessName, ref invalidHandle, ref zero); if (5 == Win32Native.LsaNtStatusToWinError(num)) { num = Win32Native.LsaConnectUntrusted(ref invalidHandle); } } catch { if (privilege != null) { privilege.Revert(); } throw; } finally { if (privilege != null) { privilege.Revert(); } } if (num < 0) { throw GetExceptionFromNtStatus(num); } byte[] bytes = new byte["Kerberos".Length + 1]; Encoding.ASCII.GetBytes("Kerberos", 0, "Kerberos".Length, bytes, 0); sizetdwBytes = new IntPtr((long)((ulong)bytes.Length)); using (SafeLocalAllocHandle handle4 = Win32Native.LocalAlloc(0, sizetdwBytes)) { if ((handle4 == null) || handle4.IsInvalid) { throw new OutOfMemoryException(); } handle4.Initialize((ulong)bytes.Length); handle4.WriteArray <byte>(0L, bytes, 0, bytes.Length); Win32Native.UNICODE_INTPTR_STRING packageName = new Win32Native.UNICODE_INTPTR_STRING("Kerberos".Length, handle4); uint authenticationPackage = 0; num = Win32Native.LsaLookupAuthenticationPackage(invalidHandle, ref packageName, ref authenticationPackage); if (num < 0) { throw GetExceptionFromNtStatus(num); } Win32Native.TOKEN_SOURCE sourceContext = new Win32Native.TOKEN_SOURCE(); if (!Win32Native.AllocateLocallyUniqueId(ref sourceContext.SourceIdentifier)) { throw new SecurityException(Win32Native.GetMessage(Marshal.GetLastWin32Error())); } sourceContext.Name = new char[8]; sourceContext.Name[0] = 'C'; sourceContext.Name[1] = 'L'; sourceContext.Name[2] = 'R'; uint profileBufferLength = 0; Win32Native.LUID logonId = new Win32Native.LUID(); Win32Native.QUOTA_LIMITS quotas = new Win32Native.QUOTA_LIMITS(); int subStatus = 0; byte[] buffer3 = Encoding.Unicode.GetBytes(upn); int num5 = Marshal.SizeOf(typeof(Win32Native.KERB_S4U_LOGON)) + buffer3.Length; using (SafeLocalAllocHandle handle5 = Win32Native.LocalAlloc(0x40, new IntPtr(num5))) { if ((handle5 == null) || handle5.IsInvalid) { throw new OutOfMemoryException(); } handle5.Initialize((ulong)num5); ulong byteOffset = (ulong)Marshal.SizeOf(typeof(Win32Native.KERB_S4U_LOGON)); handle5.WriteArray <byte>(byteOffset, buffer3, 0, buffer3.Length); byte *pointer = null; RuntimeHelpers.PrepareConstrainedRegions(); try { handle5.AcquirePointer(ref pointer); Win32Native.KERB_S4U_LOGON kerb_su_logon = new Win32Native.KERB_S4U_LOGON { MessageType = 12, Flags = 0, ClientUpn = new Win32Native.UNICODE_INTPTR_STRING(buffer3.Length, new IntPtr((void *)(pointer + byteOffset))) }; handle5.Write <Win32Native.KERB_S4U_LOGON>(0L, kerb_su_logon); num = Win32Native.LsaLogonUser(invalidHandle, ref logonProcessName, 3, authenticationPackage, new IntPtr((void *)pointer), (uint)handle5.ByteLength, IntPtr.Zero, ref sourceContext, ref profileBuffer, ref profileBufferLength, ref logonId, ref safeTokenHandle, ref quotas, ref subStatus); if ((num == -1073741714) && (subStatus < 0)) { num = subStatus; } if (num < 0) { throw GetExceptionFromNtStatus(num); } if (subStatus < 0) { throw GetExceptionFromNtStatus(subStatus); } } finally { if (pointer != null) { handle5.ReleasePointer(); } } } handle6 = safeTokenHandle; } } finally { if (!invalidHandle.IsInvalid) { invalidHandle.Dispose(); } if (!profileBuffer.IsInvalid) { profileBuffer.Dispose(); } } } return(handle6); }