From 52b40cdd07613ce996b8d02b076370f918c58dbd Mon Sep 17 00:00:00 2001
From: Eric Kohl <eric.kohl@reactos.org>
Date: Mon, 9 Jun 2003 13:45:22 +0000
Subject: [PATCH] Verify checksums of preloaded DLLs.

svn path=/trunk/; revision=4876
---
 reactos/subsys/smss/init.c | 29 ++++++++++++++++++++++++++---
 1 file changed, 26 insertions(+), 3 deletions(-)

diff --git a/reactos/subsys/smss/init.c b/reactos/subsys/smss/init.c
index a51c9639c76..303edf0bb32 100644
--- a/reactos/subsys/smss/init.c
+++ b/reactos/subsys/smss/init.c
@@ -1,4 +1,4 @@
-/* $Id: init.c,v 1.47 2003/05/14 21:27:53 ekohl Exp $
+/* $Id: init.c,v 1.48 2003/06/09 13:45:22 ekohl Exp $
  *
  * init.c - Session Manager initialization
  * 
@@ -31,6 +31,7 @@
 
 #include <ntos.h>
 #include <ntdll/rtl.h>
+#include <ntdll/ldr.h>
 #include <napi/lpc.h>
 
 #include "smss.h"
@@ -407,9 +408,31 @@ SmKnownDllsQueryRoutine(PWSTR ValueName,
   PrintString("Opened file %wZ successfully\n", &ImageName);
 #endif
 
+  /* Check for valid image checksum */
+  Status = LdrVerifyImageMatchesChecksum (FileHandle,
+					  0,
+					  0,
+					  0);
+  if (Status == STATUS_IMAGE_CHECKSUM_MISMATCH)
+    {
+      /* Raise a hard error (crash the system/BSOD) */
+      NtRaiseHardError (Status,
+			0,
+			0,
+			0,
+			0,
+			0);
+    }
+  else if (!NT_SUCCESS(Status))
+    {
+#ifndef NDEBUG
+      PrintString("Failed to check the image checksum\n");
+#endif
+      NtClose(SectionHandle);
+      NtClose(FileHandle);
 
-  /* FIXME: Check dll image file */
-
+      return STATUS_SUCCESS;
+    }
 
   InitializeObjectAttributes(&ObjectAttributes,
 			     &ImageName,