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 (IPC_CREATEEVENT_TAG == service) {
  39     return INTERCEPT_NT(manager, NtCreateEvent, CREATE_EVENT_ID, 24);
  40   } else if (IPC_OPENEVENT_TAG == service) {
  41     return INTERCEPT_NT(manager, NtOpenEvent, OPEN_EVENT_ID, 16);
  42   }
  43   return false;
  44 }
  45
  46 bool SyncDispatcher::CreateEvent(IPCInfo* ipc, std::wstring* name,
  47                                  DWORD event_type, DWORD initial_state) {
  48   const wchar_t* event_name = name->c_str();
  49   CountedParameterSet<NameBased> params;
  50   params[NameBased::NAME] = ParamPickerMake(event_name);
  51
  52   EvalResult result = policy_base_->EvalPolicy(IPC_CREATEEVENT_TAG,
  53                                                params.GetBase());
  54   HANDLE handle = NULL;
  55   DWORD ret = SyncPolicy::CreateEventAction(result, *ipc->client_info, *name,
  56                                             event_type, initial_state,
  57                                             &handle);
  58   // Return operation status on the IPC.
  59   ipc->return_info.nt_status = ret;
  60   ipc->return_info.handle = handle;
  61   return true;
  62 }
  63
  64 bool SyncDispatcher::OpenEvent(IPCInfo* ipc, std::wstring* name,
  65                                DWORD desired_access) {
  66   const wchar_t* event_name = name->c_str();
  67
  68   CountedParameterSet<OpenEventParams> params;
  69   params[OpenEventParams::NAME] = ParamPickerMake(event_name);
  70   params[OpenEventParams::ACCESS] = ParamPickerMake(desired_access);
  71
  72   EvalResult result = policy_base_->EvalPolicy(IPC_OPENEVENT_TAG,
  73                                                params.GetBase());
  74   HANDLE handle = NULL;
  75   DWORD ret = SyncPolicy::OpenEventAction(result, *ipc->client_info, *name,
  76                                           desired_access, &handle);
  77   // Return operation status on the IPC.
  78   ipc->return_info.win32_result = ret;
  79   ipc->return_info.handle = handle;
  80   return true;
  81 }
  82
  83 }  // namespace sandbox