Remove sandbox on Windows.

sandbox/win/src/target_process.cc

Index: sandbox/win/src/target_process.cc
diff --git a/sandbox/win/src/target_process.cc b/sandbox/win/src/target_process.cc
deleted file mode 100644
index 2e0376fd9b537e4dc25966b8c801035453686438..0000000000000000000000000000000000000000
--- a/sandbox/win/src/target_process.cc
+++ /dev/null
@@ -1,371 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "sandbox/win/src/target_process.h"
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <utility>
-
-#include "base/macros.h"
-#include "base/memory/free_deleter.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/win/pe_image.h"
-#include "base/win/startup_information.h"
-#include "base/win/windows_version.h"
-#include "sandbox/win/src/crosscall_client.h"
-#include "sandbox/win/src/crosscall_server.h"
-#include "sandbox/win/src/policy_low_level.h"
-#include "sandbox/win/src/sandbox_types.h"
-#include "sandbox/win/src/sharedmem_ipc_server.h"
-#include "sandbox/win/src/win_utils.h"
-
-namespace {
-
-void CopyPolicyToTarget(const void* source, size_t size, void* dest) {
-  if (!source || !size)
-    return;
-  memcpy(dest, source, size);
-  sandbox::PolicyGlobal* policy =
-      reinterpret_cast<sandbox::PolicyGlobal*>(dest);
-
-  size_t offset = reinterpret_cast<size_t>(source);
-
-  for (size_t i = 0; i < sandbox::kMaxServiceCount; i++) {
-    size_t buffer = reinterpret_cast<size_t>(policy->entry[i]);
-    if (buffer) {
-      buffer -= offset;
-      policy->entry[i] = reinterpret_cast<sandbox::PolicyBuffer*>(buffer);
-    }
-  }
-}
-
-}  // namespace
-
-namespace sandbox {
-
-SANDBOX_INTERCEPT HANDLE g_shared_section;
-SANDBOX_INTERCEPT size_t g_shared_IPC_size;
-SANDBOX_INTERCEPT size_t g_shared_policy_size;
-
-// Returns the address of the main exe module in memory taking in account
-// address space layout randomization.
-void* GetBaseAddress(const wchar_t* exe_name, void* entry_point) {
-  HMODULE exe = ::LoadLibrary(exe_name);
-  if (NULL == exe)
-    return exe;
-
-  base::win::PEImage pe(exe);
-  if (!pe.VerifyMagic()) {
-    ::FreeLibrary(exe);
-    return exe;
-  }
-  PIMAGE_NT_HEADERS nt_header = pe.GetNTHeaders();
-  char* base = reinterpret_cast<char*>(entry_point) -
-    nt_header->OptionalHeader.AddressOfEntryPoint;
-
-  ::FreeLibrary(exe);
-  return base;
-}
-
-TargetProcess::TargetProcess(base::win::ScopedHandle initial_token,
-                             base::win::ScopedHandle lockdown_token,
-                             base::win::ScopedHandle lowbox_token,
-                             HANDLE job,
-                             ThreadProvider* thread_pool)
-    // This object owns everything initialized here except thread_pool and
-    // the job_ handle. The Job handle is closed by BrokerServices and results
-    // eventually in a call to our dtor.
-    : lockdown_token_(std::move(lockdown_token)),
-      initial_token_(std::move(initial_token)),
-      lowbox_token_(std::move(lowbox_token)),
-      job_(job),
-      thread_pool_(thread_pool),
-      base_address_(NULL) {}
-
-TargetProcess::~TargetProcess() {
-  DWORD exit_code = 0;
-  // Give a chance to the process to die. In most cases the JOB_KILL_ON_CLOSE
-  // will take effect only when the context changes. As far as the testing went,
-  // this wait was enough to switch context and kill the processes in the job.
-  // If this process is already dead, the function will return without waiting.
-  // TODO(nsylvain):  If the process is still alive at the end, we should kill
-  // it. http://b/893891
-  // For now, this wait is there only to do a best effort to prevent some leaks
-  // from showing up in purify.
-  if (sandbox_process_info_.IsValid()) {
-    ::WaitForSingleObject(sandbox_process_info_.process_handle(), 50);
-    // At this point, the target process should have been killed.  Check.
-    if (!::GetExitCodeProcess(sandbox_process_info_.process_handle(),
-                              &exit_code) || (STILL_ACTIVE == exit_code)) {
-      // Something went wrong.  We don't know if the target is in a state where
-      // it can manage to do another IPC call.  If it can, and we've destroyed
-      // the |ipc_server_|, it will crash the broker.  So we intentionally leak
-      // that.
-      if (shared_section_.IsValid())
-        shared_section_.Take();
-      ignore_result(ipc_server_.release());
-      sandbox_process_info_.TakeProcessHandle();
-      return;
-    }
-  }
-
-  // ipc_server_ references our process handle, so make sure the former is shut
-  // down before the latter is closed (by ScopedProcessInformation).
-  ipc_server_.reset();
-}
-
-// Creates the target (child) process suspended and assigns it to the job
-// object.
-DWORD TargetProcess::Create(const wchar_t* exe_path,
-                            const wchar_t* command_line,
-                            bool inherit_handles,
-                            const base::win::StartupInformation& startup_info,
-                            base::win::ScopedProcessInformation* target_info) {
-  if (lowbox_token_.IsValid() &&
-      base::win::GetVersion() < base::win::VERSION_WIN8) {
-    // We don't allow lowbox_token below Windows 8.
-    return ERROR_INVALID_PARAMETER;
-  }
-
-  exe_name_.reset(_wcsdup(exe_path));
-
-  // the command line needs to be writable by CreateProcess().
-  scoped_ptr<wchar_t, base::FreeDeleter> cmd_line(_wcsdup(command_line));
-
-  // Start the target process suspended.
-  DWORD flags =
-      CREATE_SUSPENDED | CREATE_UNICODE_ENVIRONMENT | DETACHED_PROCESS;
-
-  if (startup_info.has_extended_startup_info())
-    flags |= EXTENDED_STARTUPINFO_PRESENT;
-
-  if (job_ && base::win::GetVersion() < base::win::VERSION_WIN8) {
-    // Windows 8 implements nested jobs, but for older systems we need to
-    // break out of any job we're in to enforce our restrictions.
-    flags |= CREATE_BREAKAWAY_FROM_JOB;
-  }
-
-  PROCESS_INFORMATION temp_process_info = {};
-  if (!::CreateProcessAsUserW(lockdown_token_.Get(), exe_path, cmd_line.get(),
-                              NULL,  // No security attribute.
-                              NULL,  // No thread attribute.
-                              inherit_handles, flags,
-                              NULL,  // Use the environment of the caller.
-                              NULL,  // Use current directory of the caller.
-                              startup_info.startup_info(),
-                              &temp_process_info)) {
-    return ::GetLastError();
-  }
-  base::win::ScopedProcessInformation process_info(temp_process_info);
-
-  DWORD win_result = ERROR_SUCCESS;
-
-  if (job_) {
-    // Assign the suspended target to the windows job object.
-    if (!::AssignProcessToJobObject(job_, process_info.process_handle())) {
-      win_result = ::GetLastError();
-      ::TerminateProcess(process_info.process_handle(), 0);
-      return win_result;
-    }
-  }
-
-  if (initial_token_.IsValid()) {
-    // Change the token of the main thread of the new process for the
-    // impersonation token with more rights. This allows the target to start;
-    // otherwise it will crash too early for us to help.
-    HANDLE temp_thread = process_info.thread_handle();
-    if (!::SetThreadToken(&temp_thread, initial_token_.Get())) {
-      win_result = ::GetLastError();
-      // It might be a security breach if we let the target run outside the job
-      // so kill it before it causes damage.
-      ::TerminateProcess(process_info.process_handle(), 0);
-      return win_result;
-    }
-    initial_token_.Close();
-  }
-
-  CONTEXT context;
-  context.ContextFlags = CONTEXT_ALL;
-  if (!::GetThreadContext(process_info.thread_handle(), &context)) {
-    win_result = ::GetLastError();
-    ::TerminateProcess(process_info.process_handle(), 0);
-    return win_result;
-  }
-
-#if defined(_WIN64)
-  void* entry_point = reinterpret_cast<void*>(context.Rcx);
-#else
-#pragma warning(push)
-#pragma warning(disable: 4312)
-  // This cast generates a warning because it is 32 bit specific.
-  void* entry_point = reinterpret_cast<void*>(context.Eax);
-#pragma warning(pop)
-#endif  // _WIN64
-
-  if (!target_info->DuplicateFrom(process_info)) {
-    win_result = ::GetLastError();  // This may or may not be correct.
-    ::TerminateProcess(process_info.process_handle(), 0);
-    return win_result;
-  }
-
-  if (lowbox_token_.IsValid()) {
-    PROCESS_ACCESS_TOKEN process_access_token;
-    process_access_token.thread = process_info.thread_handle();
-    process_access_token.token = lowbox_token_.Get();
-
-    NtSetInformationProcess SetInformationProcess = NULL;
-    ResolveNTFunctionPtr("NtSetInformationProcess", &SetInformationProcess);
-
-    NTSTATUS status = SetInformationProcess(
-        process_info.process_handle(),
-        static_cast<PROCESS_INFORMATION_CLASS>(NtProcessInformationAccessToken),
-        &process_access_token, sizeof(process_access_token));
-    if (!NT_SUCCESS(status)) {
-      win_result = ERROR_INVALID_TOKEN;
-      ::TerminateProcess(process_info.process_handle(), 0);  // exit code
-      return win_result;
-    }
-  }
-
-  base_address_ = GetBaseAddress(exe_path, entry_point);
-  sandbox_process_info_.Set(process_info.Take());
-  return win_result;
-}
-
-ResultCode TargetProcess::TransferVariable(const char* name, void* address,
-                                           size_t size) {
-  if (!sandbox_process_info_.IsValid())
-    return SBOX_ERROR_UNEXPECTED_CALL;
-
-  void* child_var = address;
-
-#if SANDBOX_EXPORTS
-  HMODULE module = ::LoadLibrary(exe_name_.get());
-  if (NULL == module)
-    return SBOX_ERROR_GENERIC;
-
-  child_var = ::GetProcAddress(module, name);
-  ::FreeLibrary(module);
-
-  if (NULL == child_var)
-    return SBOX_ERROR_GENERIC;
-
-  size_t offset = reinterpret_cast<char*>(child_var) -
-                  reinterpret_cast<char*>(module);
-  child_var = reinterpret_cast<char*>(MainModule()) + offset;
-#endif
-
-  SIZE_T written;
-  if (!::WriteProcessMemory(sandbox_process_info_.process_handle(),
-                            child_var, address, size, &written))
-    return SBOX_ERROR_GENERIC;
-
-  if (written != size)
-    return SBOX_ERROR_GENERIC;
-
-  return SBOX_ALL_OK;
-}
-
-// Construct the IPC server and the IPC dispatcher. When the target does
-// an IPC it will eventually call the dispatcher.
-DWORD TargetProcess::Init(Dispatcher* ipc_dispatcher,
-                          void* policy,
-                          uint32_t shared_IPC_size,
-                          uint32_t shared_policy_size) {
-  // We need to map the shared memory on the target. This is necessary for
-  // any IPC that needs to take place, even if the target has not yet hit
-  // the main( ) function or even has initialized the CRT. So here we set
-  // the handle to the shared section. The target on the first IPC must do
-  // the rest, which boils down to calling MapViewofFile()
-
-  // We use this single memory pool for IPC and for policy.
-  DWORD shared_mem_size = static_cast<DWORD>(shared_IPC_size +
-                                             shared_policy_size);
-  shared_section_.Set(::CreateFileMappingW(INVALID_HANDLE_VALUE, NULL,
-                                           PAGE_READWRITE | SEC_COMMIT,
-                                           0, shared_mem_size, NULL));
-  if (!shared_section_.IsValid()) {
-    return ::GetLastError();
-  }
-
-  DWORD access = FILE_MAP_READ | FILE_MAP_WRITE | SECTION_QUERY;
-  HANDLE target_shared_section;
-  if (!::DuplicateHandle(::GetCurrentProcess(), shared_section_.Get(),
-                         sandbox_process_info_.process_handle(),
-                         &target_shared_section, access, FALSE, 0)) {
-    return ::GetLastError();
-  }
-
-  void* shared_memory = ::MapViewOfFile(shared_section_.Get(),
-                                        FILE_MAP_WRITE|FILE_MAP_READ,
-                                        0, 0, 0);
-  if (NULL == shared_memory) {
-    return ::GetLastError();
-  }
-
-  CopyPolicyToTarget(policy, shared_policy_size,
-                     reinterpret_cast<char*>(shared_memory) + shared_IPC_size);
-
-  ResultCode ret;
-  // Set the global variables in the target. These are not used on the broker.
-  g_shared_section = target_shared_section;
-  ret = TransferVariable("g_shared_section", &g_shared_section,
-                         sizeof(g_shared_section));
-  g_shared_section = NULL;
-  if (SBOX_ALL_OK != ret) {
-    return (SBOX_ERROR_GENERIC == ret)?
-           ::GetLastError() : ERROR_INVALID_FUNCTION;
-  }
-  g_shared_IPC_size = shared_IPC_size;
-  ret = TransferVariable("g_shared_IPC_size", &g_shared_IPC_size,
-                         sizeof(g_shared_IPC_size));
-  g_shared_IPC_size = 0;
-  if (SBOX_ALL_OK != ret) {
-    return (SBOX_ERROR_GENERIC == ret) ?
-           ::GetLastError() : ERROR_INVALID_FUNCTION;
-  }
-  g_shared_policy_size = shared_policy_size;
-  ret = TransferVariable("g_shared_policy_size", &g_shared_policy_size,
-                         sizeof(g_shared_policy_size));
-  g_shared_policy_size = 0;
-  if (SBOX_ALL_OK != ret) {
-    return (SBOX_ERROR_GENERIC == ret) ?
-           ::GetLastError() : ERROR_INVALID_FUNCTION;
-  }
-
-  ipc_server_.reset(
-      new SharedMemIPCServer(sandbox_process_info_.process_handle(),
-                             sandbox_process_info_.process_id(),
-                             thread_pool_, ipc_dispatcher));
-
-  if (!ipc_server_->Init(shared_memory, shared_IPC_size, kIPCChannelSize))
-    return ERROR_NOT_ENOUGH_MEMORY;
-
-  // After this point we cannot use this handle anymore.
-  ::CloseHandle(sandbox_process_info_.TakeThreadHandle());
-
-  return ERROR_SUCCESS;
-}
-
-void TargetProcess::Terminate() {
-  if (!sandbox_process_info_.IsValid())
-    return;
-
-  ::TerminateProcess(sandbox_process_info_.process_handle(), 0);
-}
-
-TargetProcess* MakeTestTargetProcess(HANDLE process, HMODULE base_address) {
-  TargetProcess* target =
-      new TargetProcess(base::win::ScopedHandle(), base::win::ScopedHandle(),
-                        base::win::ScopedHandle(), NULL, NULL);
-  PROCESS_INFORMATION process_info = {};
-  process_info.hProcess = process;
-  target->sandbox_process_info_.Set(process_info);
-  target->base_address_ = base_address;
-  return target;
-}
-
-}  // namespace sandbox