Add sandbox support for Windows process mitigations

sandbox/win/src/broker_services.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "sandbox/win/src/broker_services.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/platform_thread.h"
 #include "base/win/scoped_handle.h"
 #include "base/win/scoped_process_information.h"
 #include "base/win/startup_information.h"
 #include "base/win/windows_version.h"
 #include "sandbox/win/src/app_container.h"
+#include "sandbox/win/src/process_mitigations.h"
 #include "sandbox/win/src/sandbox_policy_base.h"
 #include "sandbox/win/src/sandbox.h"
 #include "sandbox/win/src/target_process.h"
 #include "sandbox/win/src/win2k_threadpool.h"
 #include "sandbox/win/src/win_utils.h"
 
 namespace {
 
 // Utility function to associate a completion port to a job object.
 bool AssociateCompletionPort(HANDLE job, HANDLE port, void* key) {
@@ skipping 288 matching lines @@
     return result;
 
   // Initialize the startup information from the policy.
   base::win::StartupInformation startup_info;
   string16 desktop = policy_base->GetAlternateDesktop();
   if (!desktop.empty()) {
     startup_info.startup_info()->lpDesktop =
         const_cast<wchar_t*>(desktop.c_str());
   }
 
-  const AppContainerAttributes* app_container = policy_base->GetAppContainer();
-  if (app_container) {
-    startup_info.InitializeProcThreadAttributeList(1);
-    result = app_container->ShareForStartup(&startup_info);
-    if (SBOX_ALL_OK != result)
-      return result;
+  if (base::win::GetVersion() >= base::win::VERSION_VISTA) {
+    int attribute_count = 0;
+    const AppContainerAttributes* app_container =
+        policy_base->GetAppContainer();
+    if (app_container)
+      ++attribute_count;
+
+    DWORD64 mitigations;
+    size_t mitigations_size;
+    ConvertProcessMitigationsToPolicy(policy->GetProcessMitigations(),
+                                      &mitigations, &mitigations_size);
+    if (mitigations)
+      ++attribute_count;
+
+    if (!startup_info.InitializeProcThreadAttributeList(attribute_count))
+      return SBOX_ERROR_PROC_THREAD_ATTRIBUTES;
+
+    if (app_container) {
+      result = app_container->ShareForStartup(&startup_info);
+      if (SBOX_ALL_OK != result)
+        return result;
+    }
+
+    if (mitigations) {
+      if (!startup_info.UpdateProcThreadAttribute(
+               PROC_THREAD_ATTRIBUTE_MITIGATION_POLICY, &mitigations,
+               mitigations_size)) {
+        return SBOX_ERROR_PROC_THREAD_ATTRIBUTES;
+      }
+    }
   }
 
   // Construct the thread pool here in case it is expensive.
   // The thread pool is shared by all the targets
   if (NULL == thread_pool_)
     thread_pool_ = new Win2kThreadPool();
 
   // Create the TargetProces object and spawn the target suspended. Note that
   // Brokerservices does not own the target object. It is owned by the Policy.
   base::win::ScopedProcessInformation process_info;
@@ skipping 96 matching lines @@
     return SBOX_ERROR_UNSUPPORTED;
 
   string16 name =  LookupAppContainer(sid);
   if (name.empty())
     return SBOX_ERROR_INVALID_APP_CONTAINER;
 
   return DeleteAppContainer(sid);
 }
 
 }  // namespace sandbox