The Tor Browser: security/sandbox/win/src/sync

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 // Copyright (c) 2006-2008 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.

     5 #include "sandbox/win/src/sync_interception.h"

     7 #include "sandbox/win/src/crosscall_client.h"

     8 #include "sandbox/win/src/ipc_tags.h"

     9 #include "sandbox/win/src/policy_params.h"

    10 #include "sandbox/win/src/policy_target.h"

    11 #include "sandbox/win/src/sandbox_factory.h"

    12 #include "sandbox/win/src/sandbox_nt_util.h"

    13 #include "sandbox/win/src/sharedmem_ipc_client.h"

    14 #include "sandbox/win/src/target_services.h"

    16 namespace sandbox {

    18 HANDLE WINAPI TargetCreateEventW(CreateEventWFunction orig_CreateEvent,

    19                                  LPSECURITY_ATTRIBUTES security_attributes,

    20                                  BOOL manual_reset, BOOL initial_state,

    21                                  LPCWSTR name) {

    22   // Check if the process can create it first.

    23   HANDLE handle = orig_CreateEvent(security_attributes, manual_reset,

    24                                    initial_state, name);

    25   DWORD original_error = ::GetLastError();

    26   if (NULL != handle)

    27     return handle;

    29   // We don't trust that the IPC can work this early.

    30   if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())

    31     return NULL;

    33   do {

    34     if (security_attributes)

    35       break;

    37     void* memory = GetGlobalIPCMemory();

    38     if (NULL == memory)

    39       break;

    41     CountedParameterSet<NameBased> params;

    42     params[NameBased::NAME] = ParamPickerMake(name);

    44     if (!QueryBroker(IPC_CREATEEVENT_TAG, params.GetBase()))

    45       break;

    47     SharedMemIPCClient ipc(memory);

    48     CrossCallReturn answer = {0};

    49     ResultCode code = CrossCall(ipc, IPC_CREATEEVENT_TAG, name, manual_reset,

    50                                 initial_state, &answer);

    52     if (SBOX_ALL_OK != code)

    53       break;

    55     ::SetLastError(answer.win32_result);

    56     return answer.handle;

    57   } while (false);

    59   ::SetLastError(original_error);

    60   return NULL;

    61 }

    63 // Interception of OpenEventW on the child process.

    64 // It should never be called directly

    65 HANDLE WINAPI TargetOpenEventW(OpenEventWFunction orig_OpenEvent,

    66                                ACCESS_MASK desired_access, BOOL inherit_handle,

    67                                LPCWSTR name) {

    68   // Check if the process can open it first.

    69   HANDLE handle = orig_OpenEvent(desired_access, inherit_handle, name);

    70   DWORD original_error = ::GetLastError();

    71   if (NULL != handle)

    72     return handle;

    74   // We don't trust that the IPC can work this early.

    75   if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())

    76     return NULL;

    78   do {

    79     void* memory = GetGlobalIPCMemory();

    80     if (NULL == memory)

    81       break;

    83     uint32 inherit_handle_ipc = inherit_handle;

    84     CountedParameterSet<OpenEventParams> params;

    85     params[OpenEventParams::NAME] = ParamPickerMake(name);

    86     params[OpenEventParams::ACCESS] = ParamPickerMake(desired_access);

    88     if (!QueryBroker(IPC_OPENEVENT_TAG, params.GetBase()))

    89       break;

    91     SharedMemIPCClient ipc(memory);

    92     CrossCallReturn answer = {0};

    93     ResultCode code = CrossCall(ipc, IPC_OPENEVENT_TAG, name, desired_access,

    94                                 inherit_handle_ipc, &answer);

    96     if (SBOX_ALL_OK != code)

    97       break;

    99     ::SetLastError(answer.win32_result);

   100     return answer.handle;

   101   } while (false);

   103   ::SetLastError(original_error);

   104   return NULL;

   105 }

   107 }  // namespace sandbox

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