sandbox/win/src/named_pipe_interception.cc

   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.
   4
   5 #include "sandbox/win/src/named_pipe_interception.h"
   6
   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"
  15
  16 namespace sandbox {
  17
  18 HANDLE WINAPI TargetCreateNamedPipeW(
  19     CreateNamedPipeWFunction orig_CreateNamedPipeW, LPCWSTR pipe_name,
  20     DWORD open_mode, DWORD pipe_mode, DWORD max_instance, DWORD out_buffer_size,
  21     DWORD in_buffer_size, DWORD default_timeout,
  22     LPSECURITY_ATTRIBUTES security_attributes) {
  23   HANDLE pipe = orig_CreateNamedPipeW(pipe_name, open_mode, pipe_mode,
  24                                       max_instance, out_buffer_size,
  25                                       in_buffer_size, default_timeout,
  26                                       security_attributes);
  27   if (INVALID_HANDLE_VALUE != pipe)
  28     return pipe;
  29
  30   // We don't trust that the IPC can work this early.
  31   if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled())
  32     return INVALID_HANDLE_VALUE;
  33
  34   DWORD original_error = ::GetLastError();
  35
  36   // We don't support specific Security Attributes.
  37   if (security_attributes)
  38     return INVALID_HANDLE_VALUE;
  39
  40   do {
  41     void* memory = GetGlobalIPCMemory();
  42     if (NULL == memory)
  43       break;
  44
  45     CountedParameterSet<NameBased> params;
  46     params[NameBased::NAME] = ParamPickerMake(pipe_name);
  47
  48     if (!QueryBroker(IPC_CREATENAMEDPIPEW_TAG, params.GetBase()))
  49       break;
  50
  51     SharedMemIPCClient ipc(memory);
  52     CrossCallReturn answer = {0};
  53     ResultCode code = CrossCall(ipc, IPC_CREATENAMEDPIPEW_TAG, pipe_name,
  54                                 open_mode, pipe_mode, max_instance,
  55                                 out_buffer_size, in_buffer_size,
  56                                 default_timeout, &answer);
  57     if (SBOX_ALL_OK != code)
  58       break;
  59
  60     ::SetLastError(answer.win32_result);
  61
  62     if (ERROR_SUCCESS != answer.win32_result)
  63       return INVALID_HANDLE_VALUE;
  64
  65     return answer.handle;
  66   } while (false);
  67
  68   ::SetLastError(original_error);
  69   return INVALID_HANDLE_VALUE;
  70 }
  71
  72 }  // namespace sandbox