sandbox/win/src/sync_dispatcher.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "sandbox/win/src/sync_dispatcher.h"
   6
   7 #include "base/win/windows_version.h"
   8 #include "sandbox/win/src/crosscall_client.h"
   9 #include "sandbox/win/src/interception.h"
  10 #include "sandbox/win/src/interceptors.h"
  11 #include "sandbox/win/src/ipc_tags.h"
  12 #include "sandbox/win/src/policy_broker.h"
  13 #include "sandbox/win/src/policy_params.h"
  14 #include "sandbox/win/src/sandbox.h"
  15 #include "sandbox/win/src/sync_interception.h"
  16 #include "sandbox/win/src/sync_policy.h"
  17
  18 namespace sandbox {
  19
  20 SyncDispatcher::SyncDispatcher(PolicyBase* policy_base)
  21     : policy_base_(policy_base) {
  22   static const IPCCall create_params = {
  23       {IPC_CREATEEVENT_TAG, {WCHAR_TYPE, UINT32_TYPE, UINT32_TYPE}},
  24       reinterpret_cast<CallbackGeneric>(&SyncDispatcher::CreateEvent)};
  25
  26   static const IPCCall open_params = {
  27       {IPC_OPENEVENT_TAG, {WCHAR_TYPE, UINT32_TYPE}},
  28       reinterpret_cast<CallbackGeneric>(&SyncDispatcher::OpenEvent)};
  29
  30   ipc_calls_.push_back(create_params);
  31   ipc_calls_.push_back(open_params);
  32 }
  33
  34 bool SyncDispatcher::SetupService(InterceptionManager* manager,
  35                                   int service) {
  36   if (service == IPC_CREATEEVENT_TAG) {
  37     return INTERCEPT_NT(manager, NtCreateEvent, CREATE_EVENT_ID, 24);
  38   }
  39   return (service == IPC_OPENEVENT_TAG) &&
  40       INTERCEPT_NT(manager, NtOpenEvent, OPEN_EVENT_ID, 16);
  41 }
  42
  43 bool SyncDispatcher::CreateEvent(IPCInfo* ipc,
  44                                  base::string16* name,
  45                                  uint32 event_type,
  46                                  uint32 initial_state) {
  47   const wchar_t* event_name = name->c_str();
  48   CountedParameterSet<NameBased> params;
  49   params[NameBased::NAME] = ParamPickerMake(event_name);
  50
  51   EvalResult result = policy_base_->EvalPolicy(IPC_CREATEEVENT_TAG,
  52                                                params.GetBase());
  53   HANDLE handle = NULL;
  54   // Return operation status on the IPC.
  55   ipc->return_info.nt_status = SyncPolicy::CreateEventAction(
  56       result, *ipc->client_info, *name, event_type, initial_state, &handle);
  57   ipc->return_info.handle = handle;
  58   return true;
  59 }
  60
  61 bool SyncDispatcher::OpenEvent(IPCInfo* ipc,
  62                                base::string16* name,
  63                                uint32 desired_access) {
  64   const wchar_t* event_name = name->c_str();
  65
  66   CountedParameterSet<OpenEventParams> params;
  67   params[OpenEventParams::NAME] = ParamPickerMake(event_name);
  68   params[OpenEventParams::ACCESS] = ParamPickerMake(desired_access);
  69
  70   EvalResult result = policy_base_->EvalPolicy(IPC_OPENEVENT_TAG,
  71                                                params.GetBase());
  72   HANDLE handle = NULL;
  73   // Return operation status on the IPC.
  74   ipc->return_info.nt_status = SyncPolicy::OpenEventAction(
  75       result, *ipc->client_info, *name, desired_access, &handle);
  76   ipc->return_info.handle = handle;
  77   return true;
  78 }
  79
  80 }  // namespace sandbox