src/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, ULONG_TYPE, ULONG_TYPE},
  24     reinterpret_cast<CallbackGeneric>(&SyncDispatcher::CreateEvent)
  25   };
  26
  27   static const IPCCall open_params = {
  28     {IPC_OPENEVENT_TAG, WCHAR_TYPE, ULONG_TYPE},
  29     reinterpret_cast<CallbackGeneric>(&SyncDispatcher::OpenEvent)
  30   };
  31
  32   ipc_calls_.push_back(create_params);
  33   ipc_calls_.push_back(open_params);
  34 }
  35
  36 bool SyncDispatcher::SetupService(InterceptionManager* manager,
  37                                   int service) {
  38   if (service == IPC_CREATEEVENT_TAG) {
  39     return INTERCEPT_NT(manager, NtCreateEvent, CREATE_EVENT_ID, 24);
  40   }
  41   return (service == IPC_OPENEVENT_TAG) &&
  42       INTERCEPT_NT(manager, NtOpenEvent, OPEN_EVENT_ID, 16);
  43 }
  44
  45 bool SyncDispatcher::CreateEvent(IPCInfo* ipc, base::string16* name,
  46                                  DWORD event_type, DWORD 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, base::string16* name,
  62                                DWORD desired_access) {
  63   const wchar_t* event_name = name->c_str();
  64
  65   CountedParameterSet<OpenEventParams> params;
  66   params[OpenEventParams::NAME] = ParamPickerMake(event_name);
  67   params[OpenEventParams::ACCESS] = ParamPickerMake(desired_access);
  68
  69   EvalResult result = policy_base_->EvalPolicy(IPC_OPENEVENT_TAG,
  70                                                params.GetBase());
  71   HANDLE handle = NULL;
  72   // Return operation status on the IPC.
  73   ipc->return_info.nt_status = SyncPolicy::OpenEventAction(
  74       result, *ipc->client_info, *name, desired_access, &handle);
  75   ipc->return_info.handle = handle;
  76   return true;
  77 }
  78
  79 }  // namespace sandbox