chrome/installer/setup/setup_util.cc

   1 // Copyright (c) 2012 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 // This file declares util functions for setup project.
   6
   7 #include "chrome/installer/setup/setup_util.h"
   8
   9 #include <windows.h>
  10
  11 #include "base/command_line.h"
  12 #include "base/cpu.h"
  13 #include "base/files/file_enumerator.h"
  14 #include "base/files/file_path.h"
  15 #include "base/files/file_util.h"
  16 #include "base/logging.h"
  17 #include "base/process/kill.h"
  18 #include "base/process/launch.h"
  19 #include "base/process/process_handle.h"
  20 #include "base/strings/string_util.h"
  21 #include "base/strings/utf_string_conversions.h"
  22 #include "base/version.h"
  23 #include "base/win/registry.h"
  24 #include "base/win/windows_version.h"
  25 #include "chrome/installer/setup/setup_constants.h"
  26 #include "chrome/installer/util/copy_tree_work_item.h"
  27 #include "chrome/installer/util/google_update_constants.h"
  28 #include "chrome/installer/util/installation_state.h"
  29 #include "chrome/installer/util/installer_state.h"
  30 #include "chrome/installer/util/master_preferences.h"
  31 #include "chrome/installer/util/util_constants.h"
  32 #include "chrome/installer/util/work_item.h"
  33 #include "courgette/courgette.h"
  34 #include "courgette/third_party/bsdiff.h"
  35 #include "third_party/bspatch/mbspatch.h"
  36
  37 namespace installer {
  38
  39 namespace {
  40
  41 // Launches |setup_exe| with |command_line|, save --install-archive and its
  42 // value if present. Returns false if the process failed to launch. Otherwise,
  43 // waits indefinitely for it to exit and populates |exit_code| as expected. On
  44 // the off chance that waiting itself fails, |exit_code| is set to
  45 // WAIT_FOR_EXISTING_FAILED.
  46 bool LaunchAndWaitForExistingInstall(const base::FilePath& setup_exe,
  47                                      const CommandLine& command_line,
  48                                      int* exit_code) {
  49   DCHECK(exit_code);
  50   CommandLine new_cl(setup_exe);
  51
  52   // Copy over all switches but --install-archive.
  53   CommandLine::SwitchMap switches(command_line.GetSwitches());
  54   switches.erase(switches::kInstallArchive);
  55   for (CommandLine::SwitchMap::const_iterator i = switches.begin();
  56        i != switches.end(); ++i) {
  57     if (i->second.empty())
  58       new_cl.AppendSwitch(i->first);
  59     else
  60       new_cl.AppendSwitchNative(i->first, i->second);
  61   }
  62
  63   // Copy over all arguments.
  64   CommandLine::StringVector args(command_line.GetArgs());
  65   for (CommandLine::StringVector::const_iterator i = args.begin();
  66        i != args.end(); ++i) {
  67     new_cl.AppendArgNative(*i);
  68   }
  69
  70   // Launch the process and wait for it to exit.
  71   VLOG(1) << "Launching existing installer with command: "
  72           << new_cl.GetCommandLineString();
  73   base::ProcessHandle handle = INVALID_HANDLE_VALUE;
  74   if (!base::LaunchProcess(new_cl, base::LaunchOptions(), &handle)) {
  75     PLOG(ERROR) << "Failed to launch existing installer with command: "
  76                 << new_cl.GetCommandLineString();
  77     return false;
  78   }
  79   if (!base::WaitForExitCode(handle, exit_code)) {
  80     PLOG(DFATAL) << "Failed to get exit code from existing installer";
  81     *exit_code = WAIT_FOR_EXISTING_FAILED;
  82   } else {
  83     VLOG(1) << "Existing installer returned exit code " << *exit_code;
  84   }
  85   return true;
  86 }
  87
  88 // Returns true if product |type| cam be meaningfully installed without the
  89 // --multi-install flag.
  90 bool SupportsSingleInstall(BrowserDistribution::Type type) {
  91   return (type == BrowserDistribution::CHROME_BROWSER ||
  92           type == BrowserDistribution::CHROME_FRAME);
  93 }
  94
  95 }  // namespace
  96
  97 int CourgettePatchFiles(const base::FilePath& src,
  98                         const base::FilePath& patch,
  99                         const base::FilePath& dest) {
 100   VLOG(1) << "Applying Courgette patch " << patch.value()
 101           << " to file " << src.value()
 102           << " and generating file " << dest.value();
 103
 104   if (src.empty() || patch.empty() || dest.empty())
 105     return installer::PATCH_INVALID_ARGUMENTS;
 106
 107   const courgette::Status patch_status =
 108       courgette::ApplyEnsemblePatch(src.value().c_str(),
 109                                     patch.value().c_str(),
 110                                     dest.value().c_str());
 111   const int exit_code = (patch_status != courgette::C_OK) ?
 112       static_cast<int>(patch_status) + kCourgetteErrorOffset : 0;
 113
 114   LOG_IF(ERROR, exit_code)
 115       << "Failed to apply Courgette patch " << patch.value()
 116       << " to file " << src.value() << " and generating file " << dest.value()
 117       << ". err=" << exit_code;
 118
 119   return exit_code;
 120 }
 121
 122 int BsdiffPatchFiles(const base::FilePath& src,
 123                      const base::FilePath& patch,
 124                      const base::FilePath& dest) {
 125   VLOG(1) << "Applying bsdiff patch " << patch.value()
 126           << " to file " << src.value()
 127           << " and generating file " << dest.value();
 128
 129   if (src.empty() || patch.empty() || dest.empty())
 130     return installer::PATCH_INVALID_ARGUMENTS;
 131
 132   const int patch_status = courgette::ApplyBinaryPatch(src, patch, dest);
 133   const int exit_code = patch_status != OK ?
 134                         patch_status + kBsdiffErrorOffset : 0;
 135
 136   LOG_IF(ERROR, exit_code)
 137       << "Failed to apply bsdiff patch " << patch.value()
 138       << " to file " << src.value() << " and generating file " << dest.value()
 139       << ". err=" << exit_code;
 140
 141   return exit_code;
 142 }
 143
 144 Version* GetMaxVersionFromArchiveDir(const base::FilePath& chrome_path) {
 145   VLOG(1) << "Looking for Chrome version folder under " << chrome_path.value();
 146   base::FileEnumerator version_enum(chrome_path, false,
 147       base::FileEnumerator::DIRECTORIES);
 148   // TODO(tommi): The version directory really should match the version of
 149   // setup.exe.  To begin with, we should at least DCHECK that that's true.
 150
 151   scoped_ptr<Version> max_version(new Version("0.0.0.0"));
 152   bool version_found = false;
 153
 154   while (!version_enum.Next().empty()) {
 155     base::FileEnumerator::FileInfo find_data = version_enum.GetInfo();
 156     VLOG(1) << "directory found: " << find_data.GetName().value();
 157
 158     scoped_ptr<Version> found_version(
 159         new Version(base::UTF16ToASCII(find_data.GetName().value())));
 160     if (found_version->IsValid() &&
 161         found_version->CompareTo(*max_version.get()) > 0) {
 162       max_version.reset(found_version.release());
 163       version_found = true;
 164     }
 165   }
 166
 167   return (version_found ? max_version.release() : NULL);
 168 }
 169
 170 base::FilePath FindArchiveToPatch(const InstallationState& original_state,
 171                                   const InstallerState& installer_state) {
 172   // Check based on the version number advertised to Google Update, since that
 173   // is the value used to select a specific differential update. If an archive
 174   // can't be found using that, fallback to using the newest version present.
 175   base::FilePath patch_source;
 176   const ProductState* product =
 177       original_state.GetProductState(installer_state.system_install(),
 178                                      installer_state.state_type());
 179   if (product) {
 180     patch_source = installer_state.GetInstallerDirectory(product->version())
 181         .Append(installer::kChromeArchive);
 182     if (base::PathExists(patch_source))
 183       return patch_source;
 184   }
 185   scoped_ptr<Version> version(
 186       installer::GetMaxVersionFromArchiveDir(installer_state.target_path()));
 187   if (version) {
 188     patch_source = installer_state.GetInstallerDirectory(*version)
 189         .Append(installer::kChromeArchive);
 190     if (base::PathExists(patch_source))
 191       return patch_source;
 192   }
 193   return base::FilePath();
 194 }
 195
 196 bool DeleteFileFromTempProcess(const base::FilePath& path,
 197                                uint32 delay_before_delete_ms) {
 198   static const wchar_t kRunDll32Path[] =
 199       L"%SystemRoot%\\System32\\rundll32.exe";
 200   wchar_t rundll32[MAX_PATH];
 201   DWORD size =
 202       ExpandEnvironmentStrings(kRunDll32Path, rundll32, arraysize(rundll32));
 203   if (!size || size >= MAX_PATH)
 204     return false;
 205
 206   STARTUPINFO startup = { sizeof(STARTUPINFO) };
 207   PROCESS_INFORMATION pi = {0};
 208   BOOL ok = ::CreateProcess(NULL, rundll32, NULL, NULL, FALSE, CREATE_SUSPENDED,
 209                             NULL, NULL, &startup, &pi);
 210   if (ok) {
 211     // We use the main thread of the new process to run:
 212     //   Sleep(delay_before_delete_ms);
 213     //   DeleteFile(path);
 214     //   ExitProcess(0);
 215     // This runs before the main routine of the process runs, so it doesn't
 216     // matter much which executable we choose except that we don't want to
 217     // use e.g. a console app that causes a window to be created.
 218     size = (path.value().length() + 1) * sizeof(path.value()[0]);
 219     void* mem = ::VirtualAllocEx(pi.hProcess, NULL, size, MEM_COMMIT,
 220                                  PAGE_READWRITE);
 221     if (mem) {
 222       SIZE_T written = 0;
 223       ::WriteProcessMemory(
 224           pi.hProcess, mem, path.value().c_str(),
 225           (path.value().size() + 1) * sizeof(path.value()[0]), &written);
 226       HMODULE kernel32 = ::GetModuleHandle(L"kernel32.dll");
 227       PAPCFUNC sleep = reinterpret_cast<PAPCFUNC>(
 228           ::GetProcAddress(kernel32, "Sleep"));
 229       PAPCFUNC delete_file = reinterpret_cast<PAPCFUNC>(
 230           ::GetProcAddress(kernel32, "DeleteFileW"));
 231       PAPCFUNC exit_process = reinterpret_cast<PAPCFUNC>(
 232           ::GetProcAddress(kernel32, "ExitProcess"));
 233       if (!sleep || !delete_file || !exit_process) {
 234         NOTREACHED();
 235         ok = FALSE;
 236       } else {
 237         ::QueueUserAPC(sleep, pi.hThread, delay_before_delete_ms);
 238         ::QueueUserAPC(delete_file, pi.hThread,
 239                        reinterpret_cast<ULONG_PTR>(mem));
 240         ::QueueUserAPC(exit_process, pi.hThread, 0);
 241         ::ResumeThread(pi.hThread);
 242       }
 243     } else {
 244       PLOG(ERROR) << "VirtualAllocEx";
 245       ::TerminateProcess(pi.hProcess, ~static_cast<UINT>(0));
 246     }
 247     ::CloseHandle(pi.hThread);
 248     ::CloseHandle(pi.hProcess);
 249   }
 250
 251   return ok != FALSE;
 252 }
 253
 254 bool GetExistingHigherInstaller(
 255     const InstallationState& original_state,
 256     bool system_install,
 257     const Version& installer_version,
 258     base::FilePath* setup_exe) {
 259   DCHECK(setup_exe);
 260   bool trying_single_browser = false;
 261   const ProductState* existing_state =
 262       original_state.GetProductState(system_install,
 263                                      BrowserDistribution::CHROME_BINARIES);
 264   if (!existing_state) {
 265     // The binaries aren't installed, but perhaps a single-install Chrome is.
 266     trying_single_browser = true;
 267     existing_state =
 268         original_state.GetProductState(system_install,
 269                                        BrowserDistribution::CHROME_BROWSER);
 270   }
 271
 272   if (!existing_state ||
 273       existing_state->version().CompareTo(installer_version) <= 0) {
 274     return false;
 275   }
 276
 277   *setup_exe = existing_state->GetSetupPath();
 278
 279   VLOG_IF(1, !setup_exe->empty()) << "Found a higher version of "
 280       << (trying_single_browser ? "single-install Chrome."
 281           : "multi-install Chrome binaries.");
 282
 283   return !setup_exe->empty();
 284 }
 285
 286 bool DeferToExistingInstall(const base::FilePath& setup_exe,
 287                             const CommandLine& command_line,
 288                             const InstallerState& installer_state,
 289                             const base::FilePath& temp_path,
 290                             InstallStatus* install_status) {
 291   // Copy a master_preferences file if there is one.
 292   base::FilePath prefs_source_path(command_line.GetSwitchValueNative(
 293       switches::kInstallerData));
 294   base::FilePath prefs_dest_path(installer_state.target_path().AppendASCII(
 295       kDefaultMasterPrefs));
 296   scoped_ptr<WorkItem> copy_prefs(WorkItem::CreateCopyTreeWorkItem(
 297       prefs_source_path, prefs_dest_path, temp_path, WorkItem::ALWAYS,
 298       base::FilePath()));
 299   // There's nothing to rollback if the copy fails, so punt if so.
 300   if (!copy_prefs->Do())
 301     copy_prefs.reset();
 302
 303   int exit_code = 0;
 304   if (!LaunchAndWaitForExistingInstall(setup_exe, command_line, &exit_code)) {
 305     if (copy_prefs)
 306       copy_prefs->Rollback();
 307     return false;
 308   }
 309   *install_status = static_cast<InstallStatus>(exit_code);
 310   return true;
 311 }
 312
 313 // There are 4 disjoint cases => return values {false,true}:
 314 // (1) Product is being uninstalled => false.
 315 // (2) Product is being installed => true.
 316 // (3) Current operation ignores product, product is absent => false.
 317 // (4) Current operation ignores product, product is present => true.
 318 bool WillProductBePresentAfterSetup(
 319     const installer::InstallerState& installer_state,
 320     const installer::InstallationState& machine_state,
 321     BrowserDistribution::Type type) {
 322   DCHECK(SupportsSingleInstall(type) || installer_state.is_multi_install());
 323
 324   const ProductState* product_state =
 325       machine_state.GetProductState(installer_state.system_install(), type);
 326
 327   // Determine if the product is present prior to the current operation.
 328   bool is_present = (product_state != NULL);
 329   bool is_uninstall = installer_state.operation() == InstallerState::UNINSTALL;
 330
 331   // Determine if current operation affects the product.
 332   const Product* product = installer_state.FindProduct(type);
 333   bool is_affected = (product != NULL);
 334
 335   // Decide among {(1),(2),(3),(4)}.
 336   return is_affected ? !is_uninstall : is_present;
 337 }
 338
 339 bool AdjustProcessPriority() {
 340   if (base::win::GetVersion() >= base::win::VERSION_VISTA) {
 341     DWORD priority_class = ::GetPriorityClass(::GetCurrentProcess());
 342     if (priority_class == 0) {
 343       PLOG(WARNING) << "Failed to get the process's priority class.";
 344     } else if (priority_class == BELOW_NORMAL_PRIORITY_CLASS ||
 345                priority_class == IDLE_PRIORITY_CLASS) {
 346       BOOL result = ::SetPriorityClass(::GetCurrentProcess(),
 347                                        PROCESS_MODE_BACKGROUND_BEGIN);
 348       PLOG_IF(WARNING, !result) << "Failed to enter background mode.";
 349       return !!result;
 350     }
 351   }
 352   return false;
 353 }
 354
 355 void MigrateGoogleUpdateStateMultiToSingle(
 356     bool system_level,
 357     BrowserDistribution::Type to_migrate,
 358     const installer::InstallationState& machine_state) {
 359   const HKEY root = system_level ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
 360   const ProductState* product = NULL;
 361   BrowserDistribution* dist = NULL;
 362   LONG result = ERROR_SUCCESS;
 363   base::win::RegKey state_key;
 364
 365   Product product_to_migrate(
 366       BrowserDistribution::GetSpecificDistribution(to_migrate));
 367
 368   // Copy usagestats from the binaries to the product's ClientState key.
 369   product = machine_state.GetProductState(system_level,
 370                                           BrowserDistribution::CHROME_BINARIES);
 371   DWORD usagestats = 0;
 372   if (product && product->GetUsageStats(&usagestats)) {
 373     dist = product_to_migrate.distribution();
 374     result = state_key.Open(root, dist->GetStateKey().c_str(),
 375                             KEY_SET_VALUE);
 376     if (result != ERROR_SUCCESS) {
 377       LOG(ERROR) << "Failed opening ClientState key for "
 378                  << dist->GetDisplayName() << " to migrate usagestats.";
 379     } else {
 380       state_key.WriteValue(google_update::kRegUsageStatsField, usagestats);
 381     }
 382   }
 383
 384   // Remove the migrating product from the "ap" value of other multi-install
 385   // products.
 386   for (int i = 0; i < BrowserDistribution::NUM_TYPES; ++i) {
 387     BrowserDistribution::Type type =
 388         static_cast<BrowserDistribution::Type>(i);
 389     if (type == to_migrate)
 390       continue;
 391     product = machine_state.GetProductState(system_level, type);
 392     if (product && product->is_multi_install()) {
 393       installer::ChannelInfo channel_info;
 394       dist = BrowserDistribution::GetSpecificDistribution(type);
 395       result = state_key.Open(root, dist->GetStateKey().c_str(),
 396                               KEY_QUERY_VALUE | KEY_SET_VALUE);
 397       if (result == ERROR_SUCCESS &&
 398           channel_info.Initialize(state_key) &&
 399           product_to_migrate.SetChannelFlags(false, &channel_info)) {
 400         VLOG(1) << "Moving " << dist->GetDisplayName()
 401                 << " to channel: " << channel_info.value();
 402         channel_info.Write(&state_key);
 403       }
 404     }
 405   }
 406
 407   // Remove -multi, all product modifiers, and everything else but the channel
 408   // name from the "ap" value of the product to migrate.
 409   dist = product_to_migrate.distribution();
 410   result = state_key.Open(root, dist->GetStateKey().c_str(),
 411                           KEY_QUERY_VALUE | KEY_SET_VALUE);
 412   if (result == ERROR_SUCCESS) {
 413     installer::ChannelInfo channel_info;
 414     if (!channel_info.Initialize(state_key)) {
 415       LOG(ERROR) << "Failed reading " << dist->GetDisplayName()
 416                  << " channel info.";
 417     } else if (channel_info.RemoveAllModifiersAndSuffixes()) {
 418       VLOG(1) << "Moving " << dist->GetDisplayName()
 419               << " to channel: " << channel_info.value();
 420       channel_info.Write(&state_key);
 421     }
 422   }
 423 }
 424
 425 bool IsUninstallSuccess(InstallStatus install_status) {
 426   // The following status values represent failed uninstalls:
 427   // 15: CHROME_NOT_INSTALLED
 428   // 20: UNINSTALL_FAILED
 429   // 21: UNINSTALL_CANCELLED
 430   return (install_status == UNINSTALL_SUCCESSFUL ||
 431           install_status == UNINSTALL_REQUIRES_REBOOT);
 432 }
 433
 434 bool ContainsUnsupportedSwitch(const CommandLine& cmd_line) {
 435   static const char* const kLegacySwitches[] = {
 436     // Chrome Frame ready-mode.
 437     "ready-mode",
 438     "ready-mode-opt-in",
 439     "ready-mode-temp-opt-out",
 440     "ready-mode-end-temp-opt-out",
 441     // Chrome Frame quick-enable.
 442     "quick-enable-cf",
 443     // Installation of Chrome Frame.
 444     "chrome-frame",
 445     "migrate-chrome-frame",
 446   };
 447   for (size_t i = 0; i < arraysize(kLegacySwitches); ++i) {
 448     if (cmd_line.HasSwitch(kLegacySwitches[i]))
 449       return true;
 450   }
 451   return false;
 452 }
 453
 454 bool IsProcessorSupported() {
 455   return base::CPU().has_sse2();
 456 }
 457
 458 ScopedTokenPrivilege::ScopedTokenPrivilege(const wchar_t* privilege_name)
 459     : is_enabled_(false) {
 460   HANDLE temp_handle;
 461   if (!::OpenProcessToken(::GetCurrentProcess(),
 462                           TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY,
 463                           &temp_handle)) {
 464     return;
 465   }
 466   token_.Set(temp_handle);
 467
 468   LUID privilege_luid;
 469   if (!::LookupPrivilegeValue(NULL, privilege_name, &privilege_luid)) {
 470     token_.Close();
 471     return;
 472   }
 473
 474   // Adjust the token's privileges to enable |privilege_name|. If this privilege
 475   // was already enabled, |previous_privileges_|.PrivilegeCount will be set to 0
 476   // and we then know not to disable this privilege upon destruction.
 477   TOKEN_PRIVILEGES tp;
 478   tp.PrivilegeCount = 1;
 479   tp.Privileges[0].Luid = privilege_luid;
 480   tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
 481   DWORD return_length;
 482   if (!::AdjustTokenPrivileges(token_, FALSE, &tp, sizeof(TOKEN_PRIVILEGES),
 483                                &previous_privileges_, &return_length)) {
 484     token_.Close();
 485     return;
 486   }
 487
 488   is_enabled_ = true;
 489 }
 490
 491 ScopedTokenPrivilege::~ScopedTokenPrivilege() {
 492   if (is_enabled_ && previous_privileges_.PrivilegeCount != 0) {
 493     ::AdjustTokenPrivileges(token_, FALSE, &previous_privileges_,
 494                             sizeof(TOKEN_PRIVILEGES), NULL, NULL);
 495   }
 496 }
 497
 498 }  // namespace installer