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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 "chrome/browser/component_updater/supervised_user_whitelist_installer.h"
#include <vector>
#include "base/callback.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/path_service.h"
#include "base/strings/string_util.h"
#include "components/component_updater/component_updater_paths.h"
#include "components/component_updater/component_updater_service.h"
#include "components/component_updater/default_component_installer.h"
#include "components/crx_file/id_util.h"
namespace component_updater {
namespace {
// See the corresponding entries in extensions::manifest_keys.
const char kContentPack[] = "content_pack";
const char kContentPackSites[] = "sites";
base::FilePath GetWhitelistPath(const base::DictionaryValue& manifest,
const base::FilePath& install_dir) {
const base::DictionaryValue* content_pack_dict = nullptr;
if (!manifest.GetDictionary(kContentPack, &content_pack_dict))
return base::FilePath();
base::FilePath::StringType whitelist_file;
if (!content_pack_dict->GetString(kContentPackSites, &whitelist_file))
return base::FilePath();
return install_dir.Append(whitelist_file);
}
class SupervisedUserWhitelistComponentInstallerTraits
: public ComponentInstallerTraits {
public:
SupervisedUserWhitelistComponentInstallerTraits(
const std::string& crx_id,
const std::string& name,
const SupervisedUserWhitelistInstaller::WhitelistReadyCallback& callback)
: crx_id_(crx_id), name_(name), callback_(callback) {}
~SupervisedUserWhitelistComponentInstallerTraits() override {}
private:
// ComponentInstallerTraits overrides:
bool VerifyInstallation(const base::DictionaryValue& manifest,
const base::FilePath& install_dir) const override;
bool CanAutoUpdate() const override;
bool OnCustomInstall(const base::DictionaryValue& manifest,
const base::FilePath& install_dir) override;
void ComponentReady(const base::Version& version,
const base::FilePath& install_dir,
scoped_ptr<base::DictionaryValue> manifest) override;
base::FilePath GetBaseDirectory() const override;
void GetHash(std::vector<uint8_t>* hash) const override;
std::string GetName() const override;
std::string crx_id_;
std::string name_;
SupervisedUserWhitelistInstaller::WhitelistReadyCallback callback_;
DISALLOW_COPY_AND_ASSIGN(SupervisedUserWhitelistComponentInstallerTraits);
};
bool SupervisedUserWhitelistComponentInstallerTraits::VerifyInstallation(
const base::DictionaryValue& manifest,
const base::FilePath& install_dir) const {
// Check whether the whitelist exists at the path specified by the manifest.
// This does not check whether the whitelist is wellformed.
return base::PathExists(GetWhitelistPath(manifest, install_dir));
}
bool SupervisedUserWhitelistComponentInstallerTraits::CanAutoUpdate() const {
return true;
}
bool SupervisedUserWhitelistComponentInstallerTraits::OnCustomInstall(
const base::DictionaryValue& manifest,
const base::FilePath& install_dir) {
return true;
}
void SupervisedUserWhitelistComponentInstallerTraits::ComponentReady(
const base::Version& version,
const base::FilePath& install_dir,
scoped_ptr<base::DictionaryValue> manifest) {
callback_.Run(GetWhitelistPath(*manifest, install_dir));
}
base::FilePath
SupervisedUserWhitelistComponentInstallerTraits::GetBaseDirectory() const {
base::FilePath result;
PathService::Get(DIR_SUPERVISED_USER_WHITELISTS, &result);
return result;
}
void SupervisedUserWhitelistComponentInstallerTraits::GetHash(
std::vector<uint8_t>* hash) const {
*hash = SupervisedUserWhitelistInstaller::GetHashFromCrxId(crx_id_);
}
std::string SupervisedUserWhitelistComponentInstallerTraits::GetName() const {
return name_;
}
class SupervisedUserWhitelistInstallerImpl
: public SupervisedUserWhitelistInstaller {
public:
explicit SupervisedUserWhitelistInstallerImpl(ComponentUpdateService* cus);
~SupervisedUserWhitelistInstallerImpl() override {}
private:
// SupervisedUserWhitelistInstaller overrides:
void RegisterWhitelist(const std::string& crx_id,
const std::string& name,
bool newly_added,
const WhitelistReadyCallback& callback) override;
void UnregisterWhitelist(const std::string& crx_id) override;
ComponentUpdateService* cus_;
};
SupervisedUserWhitelistInstallerImpl::SupervisedUserWhitelistInstallerImpl(
ComponentUpdateService* cus)
: cus_(cus) {
}
void SupervisedUserWhitelistInstallerImpl::RegisterWhitelist(
const std::string& crx_id,
const std::string& name,
bool newly_added,
const WhitelistReadyCallback& callback) {
scoped_ptr<ComponentInstallerTraits> traits(
new SupervisedUserWhitelistComponentInstallerTraits(crx_id, name,
callback));
DefaultComponentInstaller* installer =
new DefaultComponentInstaller(traits.Pass());
// Takes ownership of |installer|.
installer->Register(cus_);
if (newly_added)
TriggerComponentUpdate(&cus_->GetOnDemandUpdater(), crx_id);
}
void SupervisedUserWhitelistInstallerImpl::UnregisterWhitelist(
const std::string& id) {
// TODO(bauerb): Implement!
NOTIMPLEMENTED();
}
} // namespace
// static
scoped_ptr<SupervisedUserWhitelistInstaller>
SupervisedUserWhitelistInstaller::Create(ComponentUpdateService* cus) {
return make_scoped_ptr(new SupervisedUserWhitelistInstallerImpl(cus));
}
// static
std::vector<uint8_t> SupervisedUserWhitelistInstaller::GetHashFromCrxId(
const std::string& crx_id) {
DCHECK(crx_file::id_util::IdIsValid(crx_id));
std::vector<uint8_t> hash;
uint8_t byte = 0;
for (size_t i = 0; i < crx_id.size(); ++i) {
// Uppercase characters in IDs are technically legal.
int val = base::ToLowerASCII(crx_id[i]) - 'a';
DCHECK_GE(val, 0);
DCHECK_LT(val, 16);
if (i % 2 == 0) {
byte = val;
} else {
hash.push_back(16 * byte + val);
byte = 0;
}
}
return hash;
}
// static
void SupervisedUserWhitelistInstaller::TriggerComponentUpdate(
OnDemandUpdater* updater,
const std::string& crx_id) {
updater->OnDemandUpdate(crx_id);
}
} // namespace component_updater
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