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// Copyright 2014 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 "extensions/browser/zipfile_installer.h"
#include "base/bind.h"
#include "base/containers/contains.h"
#include "base/files/file_util.h"
#include "base/path_service.h"
#include "base/strings/string_util.h"
#include "base/task/post_task.h"
#include "base/task_runner_util.h"
#include "components/services/unzip/content/unzip_service.h"
#include "components/services/unzip/public/cpp/unzip.h"
#include "components/services/unzip/public/mojom/unzipper.mojom.h"
#include "extensions/browser/extension_file_task_runner.h"
#include "extensions/common/constants.h"
#include "extensions/common/manifest.h"
#include "extensions/strings/grit/extensions_strings.h"
#include "ui/base/l10n/l10n_util.h"
namespace extensions {
namespace {
constexpr char kExtensionHandlerTempDirError[] =
"Could not create temporary directory for zipped extension.";
constexpr char kExtensionHandlerFileUnzipError[] =
"Could not unzip extension for install.";
constexpr const base::FilePath::CharType* kAllowedThemeFiletypes[] = {
FILE_PATH_LITERAL(".bmp"), FILE_PATH_LITERAL(".gif"),
FILE_PATH_LITERAL(".jpeg"), FILE_PATH_LITERAL(".jpg"),
FILE_PATH_LITERAL(".json"), FILE_PATH_LITERAL(".png"),
FILE_PATH_LITERAL(".webp")};
absl::optional<base::FilePath> PrepareAndGetUnzipDir(
const base::FilePath& zip_file) {
base::FilePath dir_temp;
base::PathService::Get(base::DIR_TEMP, &dir_temp);
base::FilePath::StringType dir_name =
zip_file.RemoveExtension().BaseName().value() + FILE_PATH_LITERAL("_");
base::FilePath unzip_dir;
if (!base::CreateTemporaryDirInDir(dir_temp, dir_name, &unzip_dir))
return absl::optional<base::FilePath>();
return unzip_dir;
}
absl::optional<std::string> ReadFileContent(const base::FilePath& path) {
std::string content;
return base::ReadFileToString(path, &content) ? content
: absl::optional<std::string>();
}
} // namespace
// static
scoped_refptr<ZipFileInstaller> ZipFileInstaller::Create(
const scoped_refptr<base::SequencedTaskRunner>& io_task_runner,
DoneCallback done_callback) {
DCHECK(done_callback);
return base::WrapRefCounted(
new ZipFileInstaller(io_task_runner, std::move(done_callback)));
}
void ZipFileInstaller::LoadFromZipFile(const base::FilePath& zip_file) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
LoadFromZipFileImpl(zip_file, base::FilePath());
}
void ZipFileInstaller::LoadFromZipFileInDir(const base::FilePath& zip_file,
const base::FilePath& unzip_dir) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(!unzip_dir.empty());
LoadFromZipFileImpl(zip_file, unzip_dir);
}
void ZipFileInstaller::LoadFromZipFileImpl(const base::FilePath& zip_file,
const base::FilePath& unzip_dir) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(!zip_file.empty());
zip_file_ = zip_file;
if (!unzip_dir.empty()) {
Unzip(unzip_dir);
return;
}
base::PostTaskAndReplyWithResult(
io_task_runner_.get(), FROM_HERE,
base::BindOnce(&PrepareAndGetUnzipDir, zip_file),
base::BindOnce(&ZipFileInstaller::Unzip, this));
}
ZipFileInstaller::ZipFileInstaller(
const scoped_refptr<base::SequencedTaskRunner>& io_task_runner,
DoneCallback done_callback)
: done_callback_(std::move(done_callback)),
io_task_runner_(io_task_runner) {}
ZipFileInstaller::~ZipFileInstaller() = default;
void ZipFileInstaller::Unzip(absl::optional<base::FilePath> unzip_dir) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (!unzip_dir) {
ReportFailure(std::string(kExtensionHandlerTempDirError));
return;
}
unzip::UnzipWithFilter(
unzip::LaunchUnzipper(), zip_file_, *unzip_dir,
base::BindRepeating(&ZipFileInstaller::IsManifestFile),
base::BindOnce(&ZipFileInstaller::ManifestUnzipped, this, *unzip_dir));
}
void ZipFileInstaller::ManifestUnzipped(const base::FilePath& unzip_dir,
bool success) {
if (!success) {
ReportFailure(kExtensionHandlerFileUnzipError);
return;
}
base::PostTaskAndReplyWithResult(
io_task_runner_.get(), FROM_HERE,
base::BindOnce(&ReadFileContent, unzip_dir.Append(kManifestFilename)),
base::BindOnce(&ZipFileInstaller::ManifestRead, this, unzip_dir));
}
void ZipFileInstaller::ManifestRead(
const base::FilePath& unzip_dir,
absl::optional<std::string> manifest_content) {
if (!manifest_content) {
ReportFailure(std::string(kExtensionHandlerFileUnzipError));
return;
}
data_decoder::DataDecoder::ParseJsonIsolated(
*manifest_content,
base::BindOnce(&ZipFileInstaller::ManifestParsed, this, unzip_dir));
}
void ZipFileInstaller::ManifestParsed(
const base::FilePath& unzip_dir,
data_decoder::DataDecoder::ValueOrError result) {
if (!result.value) {
ReportFailure(std::string(kExtensionHandlerFileUnzipError));
return;
}
std::unique_ptr<base::DictionaryValue> manifest_dictionary =
base::DictionaryValue::From(
base::Value::ToUniquePtrValue(std::move(*result.value)));
if (!manifest_dictionary) {
ReportFailure(std::string(kExtensionHandlerFileUnzipError));
return;
}
Manifest::Type manifest_type =
Manifest::GetTypeFromManifestValue(*manifest_dictionary);
unzip::UnzipFilterCallback filter = base::BindRepeating(
[](bool is_theme, const base::FilePath& file_path) -> bool {
// Note that we ignore the manifest as it has already been extracted and
// would cause the unzipping to fail.
return ZipFileInstaller::ShouldExtractFile(is_theme, file_path) &&
!ZipFileInstaller::IsManifestFile(file_path);
},
manifest_type == Manifest::TYPE_THEME);
// TODO(crbug.com/645263): This silently ignores blocked file types.
// Add install warnings.
unzip::UnzipWithFilter(
unzip::LaunchUnzipper(), zip_file_, unzip_dir, filter,
base::BindOnce(&ZipFileInstaller::UnzipDone, this, unzip_dir));
}
void ZipFileInstaller::UnzipDone(const base::FilePath& unzip_dir,
bool success) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (!success) {
ReportFailure(kExtensionHandlerFileUnzipError);
return;
}
std::move(done_callback_).Run(zip_file_, unzip_dir, std::string());
}
void ZipFileInstaller::ReportFailure(const std::string& error) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
std::move(done_callback_).Run(zip_file_, base::FilePath(), error);
}
// static
bool ZipFileInstaller::ShouldExtractFile(bool is_theme,
const base::FilePath& file_path) {
if (is_theme) {
const base::FilePath::StringType extension =
base::ToLowerASCII(file_path.FinalExtension());
// Allow filenames with no extension.
if (extension.empty())
return true;
return base::Contains(kAllowedThemeFiletypes, extension);
}
return !base::FilePath::CompareEqualIgnoreCase(file_path.FinalExtension(),
FILE_PATH_LITERAL(".exe"));
}
// static
bool ZipFileInstaller::IsManifestFile(const base::FilePath& file_path) {
CHECK(!file_path.IsAbsolute());
return base::FilePath::CompareEqualIgnoreCase(file_path.value(),
kManifestFilename);
}
} // namespace extensions
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