// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// This file declares util functions for setup project. It also declares a
// few functions that the Chrome component updater uses for patching binary
// deltas.
#ifndef CHROME_INSTALLER_SETUP_SETUP_UTIL_H_
#define CHROME_INSTALLER_SETUP_SETUP_UTIL_H_
#include <stdint.h>
#include <memory>
#include <optional>
#include <string>
#include <vector>
#include "base/time/time.h"
#include "base/win/windows_types.h"
#include "chrome/installer/util/lzma_util.h"
#include "chrome/installer/util/util_constants.h"
class WorkItemList;
namespace base {
class CommandLine;
class FilePath;
class Version;
} // namespace base
namespace installer {
class InstallationState;
class InstallerState;
class InitialPreferences;
extern const char kUnPackStatusMetricsName[];
// The name of consumers of UnPackArchive which is used to publish metrics.
enum UnPackConsumer {
CHROME_ARCHIVE_PATCH,
COMPRESSED_CHROME_ARCHIVE,
SETUP_EXE_PATCH,
UNCOMPRESSED_CHROME_ARCHIVE,
};
// Find the version of Chrome from an install source directory.
// Chrome_path should contain at least one version folder.
// Returns the maximum version found or nullptr if no version is found.
base::Version* GetMaxVersionFromArchiveDir(const base::FilePath& chrome_path);
// Returns the uncompressed archive of the installed version that serves as the
// source for patching. If |desired_version| is valid, only the path to that
// version will be returned, or empty if it doesn't exist.
base::FilePath FindArchiveToPatch(const InstallationState& original_state,
const InstallerState& installer_state,
const base::Version& desired_version);
// Spawns a new process that waits for a specified amount of time before
// attempting to delete |path|. This is useful for setup to delete the
// currently running executable or a file that we cannot close right away but
// estimate that it will be possible after some period of time.
// Returns true if a new process was started, false otherwise. Note that
// given the nature of this function, it is not possible to know if the
// delete operation itself succeeded.
bool DeleteFileFromTempProcess(const base::FilePath& path,
uint32_t delay_before_delete_ms);
// Drops the thread down to background processing mode on supported OSes if it
// was launched below the normal process priority. Returns true when background
// processing mode is entered.
bool AdjustThreadPriority();
// Returns true if |install_status| represents a successful uninstall code.
bool IsUninstallSuccess(InstallStatus install_status);
// Returns true if |cmd_line| contains unsupported (legacy) switches.
bool ContainsUnsupportedSwitch(const base::CommandLine& cmd_line);
// Returns true if the processor is supported by chrome.
bool IsProcessorSupported();
// Deletes all values and subkeys of the key |path| under |root|, preserving
// the keys named in |keys_to_preserve| (each of which must be an ASCII string).
// The key itself is deleted if no subkeys are preserved.
void DeleteRegistryKeyPartial(
HKEY root,
const std::wstring& path,
const std::vector<std::wstring>& keys_to_preserve);
// Returns true if downgrade is allowed by installer data.
bool IsDowngradeAllowed(const InitialPreferences& prefs);
// Returns the age (in days) of the installation based on the creation time of
// its installation directory, or -1 in case of error.
int GetInstallAge(const InstallerState& installer_state);
// Records UMA metrics for unpack result.
void RecordUnPackMetrics(UnPackStatus unpack_status, UnPackConsumer consumer);
// Register Chrome's EventLog message provider dll.
void RegisterEventLogProvider(const base::FilePath& install_directory,
const base::Version& version);
// De-register Chrome's EventLog message provider dll.
void DeRegisterEventLogProvider();
// Removes leftover bits from features that have been removed from the product.
void DoLegacyCleanups(const InstallerState& installer_state,
InstallStatus install_status);
// Returns the time of the start of the console user's Windows logon session, or
// a null time in case of error.
base::Time GetConsoleSessionStartTime();
// Returns a DM token decoded from the base-64 `encoded_token`, or null in case
// of a decoding error. The returned DM token is an opaque binary blob and
// should not be treated as an ASCII or UTF-8 string.
std::optional<std::string> DecodeDMTokenSwitchValue(
const std::wstring& encoded_token);
// Returns a nonce decoded from the base-64 `encoded_nonce`, or null in case
// of a decoding error. The returned nonce is an opaque binary blob and
// should not be treated as an ASCII or UTF-8 string.
std::optional<std::string> DecodeNonceSwitchValue(
const std::string& encoded_nonce);
// Saves a DM token to a global location on the machine accessible to all
// install modes of the browser (i.e., stable and all three side-by-side modes).
bool StoreDMToken(const std::string& token);
// Deletes any existing DMToken from the global location on the machine.
bool DeleteDMToken();
// Returns the file path to notification_helper.exe (in |version| directory).
base::FilePath GetNotificationHelperPath(const base::FilePath& target_path,
const base::Version& version);
// Returns the file path to chrome_wer.dll (in `version` directory).
base::FilePath GetWerHelperPath(const base::FilePath& target_path,
const base::Version& version);
// Returns the WER runtime exception helper module registry path.
std::wstring GetWerHelperRegistryPath();
// Returns the file path to elevation_service.exe (in |version| directory).
base::FilePath GetElevationServicePath(const base::FilePath& target_path,
const base::Version& version);
// Adds or removes downgrade version registry value.
void AddUpdateDowngradeVersionItem(HKEY root,
const base::Version& current_version,
const base::Version& new_version,
WorkItemList* list);
} // namespace installer
#endif // CHROME_INSTALLER_SETUP_SETUP_UTIL_H_
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