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

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/named_pipe_policy.h"

     7 #include <string>

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

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

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

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

    14 namespace {

    16 // Creates a named pipe and duplicates the handle to 'target_process'. The

    17 // remaining parameters are the same as CreateNamedPipeW().

    18 HANDLE CreateNamedPipeHelper(HANDLE target_process, LPCWSTR pipe_name,

    19                               DWORD open_mode, DWORD pipe_mode,

    20                               DWORD max_instances, DWORD out_buffer_size,

    21                               DWORD in_buffer_size, DWORD default_timeout,

    22                               LPSECURITY_ATTRIBUTES security_attributes) {

    23   HANDLE pipe = ::CreateNamedPipeW(pipe_name, open_mode, pipe_mode,

    24                                    max_instances, out_buffer_size,

    25                                    in_buffer_size, default_timeout,

    26                                    security_attributes);

    27   if (INVALID_HANDLE_VALUE == pipe)

    28     return pipe;

    30   HANDLE new_pipe;

    31   if (!::DuplicateHandle(::GetCurrentProcess(), pipe,

    32                          target_process, &new_pipe,

    33                          0, FALSE,

    34                          DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS)) {

    35     return INVALID_HANDLE_VALUE;

    36   }

    38   return new_pipe;

    39 }

    41 }  // namespace

    43 namespace sandbox {

    45 bool NamedPipePolicy::GenerateRules(const wchar_t* name,

    46                                     TargetPolicy::Semantics semantics,

    47                                     LowLevelPolicy* policy) {

    48   if (TargetPolicy::NAMEDPIPES_ALLOW_ANY != semantics) {

    49     return false;

    50   }

    51   PolicyRule pipe(ASK_BROKER);

    52   if (!pipe.AddStringMatch(IF, NameBased::NAME, name, CASE_INSENSITIVE)) {

    53     return false;

    54   }

    55   if (!policy->AddRule(IPC_CREATENAMEDPIPEW_TAG, &pipe)) {

    56     return false;

    57   }

    58   return true;

    59 }

    61 DWORD NamedPipePolicy::CreateNamedPipeAction(EvalResult eval_result,

    62                                              const ClientInfo& client_info,

    63                                              const std::wstring &name,

    64                                              DWORD open_mode, DWORD pipe_mode,

    65                                              DWORD max_instances,

    66                                              DWORD out_buffer_size,

    67                                              DWORD in_buffer_size,

    68                                              DWORD default_timeout,

    69                                              HANDLE* pipe) {

    70   // The only action supported is ASK_BROKER which means create the pipe.

    71   if (ASK_BROKER != eval_result) {

    72     return ERROR_ACCESS_DENIED;

    73   }

    75   *pipe = CreateNamedPipeHelper(client_info.process, name.c_str(),

    76                                 open_mode, pipe_mode, max_instances,

    77                                 out_buffer_size, in_buffer_size,

    78                                 default_timeout, NULL);

    80   if (INVALID_HANDLE_VALUE == *pipe)

    81     return ERROR_ACCESS_DENIED;

    83   return ERROR_SUCCESS;

    84 }

    86 }  // namespace sandbox

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