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// Copyright 2016 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 <windows.h>
#include <memory>
#include <string>
#include "chrome/install_static/install_constants.h"
#include "chrome/install_static/install_modes.h"
#include "chrome/install_static/install_util.h"
namespace install_static {
class PrimaryInstallDetails;
class ScopedInstallDetails;
// The origin of the active channel.
enum class ChannelOrigin {
kInstallMode, // The channel dictated by the install mode.
kAdditionalParameters, // The legacy "ap" value.
kPolicy, // The updater's "TargetChannel" policy.
// Details relating to how Chrome is installed. This class and
// PrimaryInstallDetails (below) are used in tandem so that one instance of the
// latter may be initialized early during process startup and then shared with
// other modules in the process. For example, chrome_elf creates the instance
// for a Chrome process and exports a GetInstallDetailsPayload function used by
// chrome.exe and chrome.dll to create their own module-specific instances
// referring to the same underlying payload. See install_modes.h for a gentle
// introduction to such terms as "brand" and "mode".
class InstallDetails {
// A POD-struct containing the underlying data for an InstallDetails
// instance. Multiple InstallDetails instances (e.g., one per module in a
// process) share a single underlying Payload.
struct Payload {
// The size (in bytes) of this structure. This serves to verify that all
// modules in a process have the same definition of the struct.
size_t size;
// The compile-time version of the product at the time that the process's
// primary module was built. This is used to detect version skew across
// modules in the process.
const char* product_version;
// The brand-specific install mode for this install; see kInstallModes.
const InstallConstants* mode;
// The friendly name of this Chrome's channel, or an empty string if the
// brand does not integrate with Google Update.
const wchar_t* channel;
// The string length of |channel| (not including the string terminator).
size_t channel_length;
// The origin of the |channel| value. Install modes that use the
// ADDITIONAL_PARAMETERS channel strategy may determine the channel by
// either the "ap" value (kAdditionalParameters) or by an administrative
// policy override (kPolicy). For all other install modes, the channel is
// dictated by the mode itself (kInstallMode).
ChannelOrigin channel_origin;
// The "ap" (additional parameters) value read from Chrome's ClientState key
// during process startup.
const wchar_t* update_ap;
// The "name" value read from Chrome's ClientState\cohort key during process
// startup.
const wchar_t* update_cohort_name;
// True if installed in C:\Program Files{, {x86)}; otherwise, false.
bool system_level;
InstallDetails(const InstallDetails&) = delete;
InstallDetails(InstallDetails&&) = delete;
InstallDetails& operator=(const InstallDetails&) = delete;
virtual ~InstallDetails() = default;
// Returns the instance for this module.
static const InstallDetails& Get();
// This mode's index into the brand's array of install modes. This will match
// a brand-specific InstallConstantIndex enumerator.
int install_mode_index() const { return payload_->mode->index; }
// Returns true if the current mode is the brand's primary install mode rather
// than one of its secondary modes (e.g., canary Chrome).
bool is_primary_mode() const { return install_mode_index() == 0; }
// Returns the installer command-line switch that selects the current mode.
const char* install_switch() const { return payload_->mode->install_switch; }
// The mode's install suffix (e.g., " SxS" for canary Chrome), or an empty
// string for a brand's primary install mode.
const wchar_t* install_suffix() const {
return payload_->mode->install_suffix;
// The mode's logo suffix (e.g., "Canary" for canary Chrome), or an empty
// string for a brand's primary install mode.
const wchar_t* logo_suffix() const { return payload_->mode->logo_suffix; }
// Returns the full name of the installed product (e.g. "Chrome SxS" for
// canary chrome).
std::wstring install_full_name() const {
return std::wstring(kProductPathName, kProductPathNameLength)
const InstallConstants& mode() const { return *payload_->mode; }
// The app GUID with which this mode is registered with Google Update, or an
// empty string if this brand does not integrate with Google Update.
const wchar_t* app_guid() const { return payload_->mode->app_guid; }
// The toast activator CLSID with which Chrome is registered with the Windows
// OS.
const CLSID& toast_activator_clsid() const {
return payload_->mode->toast_activator_clsid;
// The CLSID of the COM server that provides silent elevation functionality.
const CLSID& elevator_clsid() const { return payload_->mode->elevator_clsid; }
// The IID and the TypeLib of the IElevator interface that provides silent
// elevation functionality.
const IID& elevator_iid() const { return payload_->mode->elevator_iid; }
// Returns the unsuffixed portion of the AppUserModelId. The AppUserModelId is
// used to group an app's windows together on the Windows taskbar along with
// its corresponding shortcuts; see
// for more
// information. Use ShellUtil::GetBrowserModelId to get the suffixed value --
// it is almost never correct to use the unsuffixed (base) portion of this id
// directly.
const wchar_t* base_app_id() const { return payload_->mode->base_app_id; }
// True if the mode supports installation at system-level.
bool supports_system_level() const {
return payload_->mode->supports_system_level;
// Returns the resource id of this mode's main application icon.
int32_t app_icon_resource_id() const {
return payload_->mode->app_icon_resource_id;
// The install's update channel, or an empty string if the brand does not
// integrate with Google Update.
std::wstring channel() const {
return std::wstring(payload_->channel, payload_->channel_length);
// The origin of a ChannelStrategy::ADDITIONAL_PARAMETERS install mode's
// channel, or kInstallMode.
ChannelOrigin channel_origin() const { return payload_->channel_origin; }
// Returns the "ap" (additional parameters) value read from Chrome's
// ClientState key during process startup.
std::wstring update_ap() const {
return payload_->update_ap ? std::wstring(payload_->update_ap)
: std::wstring();
// Returns the "name" value read from Chrome's ClientState\cohort key during
// process startup.
std::wstring update_cohort_name() const {
return payload_->update_cohort_name
? std::wstring(payload_->update_cohort_name)
: std::wstring();
bool system_level() const { return payload_->system_level; }
// Returns the path to the installation's ClientState registry key. This
// registry key is used to hold various installation-related values, including
// an indication of consent for usage stats.
std::wstring GetClientStateKeyPath() const;
// Returns the path to the installation's ClientStateMedium registry key. This
// registry key is used to hold various installation-related values, including
// an indication of consent for usage stats for a system-level install.
std::wstring GetClientStateMediumKeyPath() const;
// Returns true if there is an indication of a mismatch between the primary
// module and this module.
bool VersionMismatch() const;
// Sets the instance for the process. This must be called only once per
// process during startup.
static void SetForProcess(std::unique_ptr<PrimaryInstallDetails> details);
// Returns a pointer to the module's payload so that it may be shared with
// other modules in the process.
static const Payload* GetPayload();
// Initializes this module's instance with the payload from the process's
// primary module (the one that used SetForProcess).
static void InitializeFromPayload(const Payload* payload);
explicit InstallDetails(const Payload* payload) : payload_(payload) {}
const wchar_t* default_channel_name() const {
return payload_->mode->default_channel_name;
friend class ScopedInstallDetails;
// Swaps this module's instance with a provided instance, returning the
// module's previous instance.
static std::unique_ptr<const InstallDetails> Swap(
std::unique_ptr<const InstallDetails> install_details);
const Payload* const payload_;
// A kind of InstallDetails that owns its payload. A single instance of this
// class is initialized early on in process startup (e.g., in chrome_elf for the
// case of chrome.exe; see InitializeProductDetailsForPrimaryModule). Its
// underlying data (its "payload") is shared with other interested modules in
// the process.
class PrimaryInstallDetails : public InstallDetails {
PrimaryInstallDetails(const PrimaryInstallDetails&) = delete;
PrimaryInstallDetails(PrimaryInstallDetails&&) = delete;
PrimaryInstallDetails& operator=(const PrimaryInstallDetails&) = delete;
void set_mode(const InstallConstants* mode) { payload_.mode = mode; }
void set_channel(const std::wstring& channel) {
channel_ = channel; = channel_.c_str();
payload_.channel_length = channel_.size();
void set_channel_origin(ChannelOrigin origin) {
payload_.channel_origin = origin;
void set_update_ap(const std::wstring& update_ap) {
update_ap_ = update_ap;
payload_.update_ap = update_ap_.c_str();
void set_update_cohort_name(const std::wstring& update_cohort_name) {
update_cohort_name_ = update_cohort_name;
payload_.update_cohort_name = update_cohort_name_.c_str();
void set_system_level(bool system_level) {
payload_.system_level = system_level;
std::wstring channel_;
std::wstring update_ap_;
std::wstring update_cohort_name_;
Payload payload_ = Payload();
} // namespace install_static