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// 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.
#include "chrome/browser/extensions/startup_helper.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/memory/raw_ref.h"
#include "base/run_loop.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/single_thread_task_runner.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/initialize_extensions_client.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "extensions/browser/extension_file_task_runner.h"
#include "extensions/browser/sandboxed_unpacker.h"
#include "extensions/common/extension.h"
#include "extensions/common/verifier_formats.h"
using content::BrowserThread;
namespace extensions {
namespace {
void PrintPackExtensionMessage(const std::string& message) {
VLOG(1) << message;
}
} // namespace
StartupHelper::StartupHelper() {
EnsureExtensionsClientInitialized();
}
StartupHelper::~StartupHelper() = default;
void StartupHelper::OnPackSuccess(
const base::FilePath& crx_path,
const base::FilePath& output_private_key_path) {
pack_job_succeeded_ = true;
PrintPackExtensionMessage(
base::UTF16ToUTF8(
PackExtensionJob::StandardSuccessMessage(crx_path,
output_private_key_path)));
}
void StartupHelper::OnPackFailure(const std::string& error_message,
ExtensionCreator::ErrorType type) {
error_message_ = error_message;
PrintPackExtensionMessage(error_message);
}
bool StartupHelper::PackExtension(const base::CommandLine& cmd_line,
std::string* error) {
if (!cmd_line.HasSwitch(::switches::kPackExtension))
return false;
// Input Paths.
base::FilePath src_dir =
cmd_line.GetSwitchValuePath(::switches::kPackExtension);
base::FilePath private_key_path;
if (cmd_line.HasSwitch(::switches::kPackExtensionKey)) {
private_key_path =
cmd_line.GetSwitchValuePath(::switches::kPackExtensionKey);
}
// Launch a job to perform the packing on the blocking thread. Ignore
// warnings from the packing process. (e.g. Overwrite any existing crx file.)
PackExtensionJob pack_job(this, src_dir, private_key_path,
ExtensionCreator::kOverwriteCRX);
pack_job.set_synchronous();
pack_job.Start();
if (!pack_job_succeeded_)
*error = error_message_;
return pack_job_succeeded_;
}
namespace {
class ValidateCrxHelper : public SandboxedUnpackerClient {
public:
ValidateCrxHelper(const CRXFileInfo& file,
const base::FilePath& temp_dir,
base::OnceClosure quit_closure)
: crx_file_(file),
temp_dir_(temp_dir),
quit_closure_(std::move(quit_closure)),
success_(false) {}
ValidateCrxHelper(const ValidateCrxHelper&) = delete;
ValidateCrxHelper& operator=(const ValidateCrxHelper&) = delete;
bool success() const { return success_; }
const std::u16string& error() const { return error_; }
void Start() {
GetExtensionFileTaskRunner()->PostTask(
FROM_HERE,
base::BindOnce(&ValidateCrxHelper::StartOnBlockingThread, this));
}
protected:
~ValidateCrxHelper() override = default;
void OnUnpackSuccess(const base::FilePath& temp_dir,
const base::FilePath& extension_root,
std::unique_ptr<base::Value::Dict> original_manifest,
const Extension* extension,
const SkBitmap& install_icon,
base::Value::Dict ruleset_install_prefs) override {
DCHECK(GetExtensionFileTaskRunner()->RunsTasksInCurrentSequence());
success_ = true;
content::GetUIThreadTaskRunner({})->PostTask(
FROM_HERE, base::BindOnce(&ValidateCrxHelper::FinishOnUIThread, this));
}
void OnUnpackFailure(const CrxInstallError& error) override {
DCHECK(GetExtensionFileTaskRunner()->RunsTasksInCurrentSequence());
success_ = false;
error_ = error.message();
content::GetUIThreadTaskRunner({})->PostTask(
FROM_HERE, base::BindOnce(&ValidateCrxHelper::FinishOnUIThread, this));
}
void FinishOnUIThread() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
std::move(quit_closure_).Run();
}
void StartOnBlockingThread() {
DCHECK(GetExtensionFileTaskRunner()->RunsTasksInCurrentSequence());
auto unpacker = base::MakeRefCounted<SandboxedUnpacker>(
mojom::ManifestLocation::kInternal, 0, /* no special creation flags */
*temp_dir_, GetExtensionFileTaskRunner().get(), this);
unpacker->StartWithCrx(*crx_file_);
}
// The file being validated.
const raw_ref<const CRXFileInfo> crx_file_;
// The temporary directory where the sandboxed unpacker will do work.
const raw_ref<const base::FilePath> temp_dir_;
// Closure called upon completion.
base::OnceClosure quit_closure_;
// Whether the unpacking was successful.
bool success_;
// If the unpacking wasn't successful, this contains an error message.
std::u16string error_;
};
} // namespace
bool StartupHelper::ValidateCrx(const base::CommandLine& cmd_line,
std::string* error) {
CHECK(error);
base::FilePath path = cmd_line.GetSwitchValuePath(::switches::kValidateCrx);
if (path.empty()) {
*error = base::StringPrintf("Empty path passed for %s",
::switches::kValidateCrx);
return false;
}
base::ScopedTempDir temp_dir;
if (!temp_dir.CreateUniqueTempDir()) {
*error = std::string("Failed to create temp dir");
return false;
}
base::RunLoop run_loop;
CRXFileInfo file(path, extensions::GetExternalVerifierFormat());
auto helper = base::MakeRefCounted<ValidateCrxHelper>(
file, temp_dir.GetPath(), run_loop.QuitClosure());
helper->Start();
run_loop.Run();
bool success = helper->success();
if (!success)
*error = base::UTF16ToUTF8(helper->error());
return success;
}
} // namespace extensions
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