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// Copyright 2015 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "buffet/buffet_config.h"
#include <map>
#include <set>
#include <base/files/file_util.h>
#include <base/files/important_file_writer.h>
#include <base/logging.h>
#include <base/message_loop/message_loop.h>
#include <base/strings/string_number_conversions.h>
#include <brillo/errors/error.h>
#include <brillo/errors/error_codes.h>
#include <brillo/osrelease_reader.h>
#include <brillo/strings/string_utils.h>
#include <weave/enum_to_string.h>
namespace buffet {
namespace {
const char kErrorDomain[] = "buffet";
const char kFileReadError[] = "file_read_error";
const char kProductVersionKey[] = "product_version";
class DefaultFileIO : public BuffetConfig::FileIO {
public:
bool ReadFile(const base::FilePath& path, std::string* content) override {
return base::ReadFileToString(path, content);
}
bool WriteFile(const base::FilePath& path,
const std::string& content) override {
return base::ImportantFileWriter::WriteFileAtomically(path, content);
}
};
} // namespace
namespace config_keys {
const char kClientId[] = "client_id";
const char kClientSecret[] = "client_secret";
const char kApiKey[] = "api_key";
const char kOAuthURL[] = "oauth_url";
const char kServiceURL[] = "service_url";
const char kName[] = "name";
const char kDescription[] = "description";
const char kLocation[] = "location";
const char kLocalAnonymousAccessRole[] = "local_anonymous_access_role";
const char kLocalDiscoveryEnabled[] = "local_discovery_enabled";
const char kLocalPairingEnabled[] = "local_pairing_enabled";
const char kOemName[] = "oem_name";
const char kModelName[] = "model_name";
const char kModelId[] = "model_id";
const char kWifiAutoSetupEnabled[] = "wifi_auto_setup_enabled";
const char kEmbeddedCode[] = "embedded_code";
const char kPairingModes[] = "pairing_modes";
const char kAllowEndpointsOverride[] = "allow_endpoints_override";
} // namespace config_keys
BuffetConfig::BuffetConfig(const Options& options)
: options_(options),
default_encryptor_(Encryptor::CreateDefaultEncryptor()),
encryptor_(default_encryptor_.get()),
default_file_io_(new DefaultFileIO),
file_io_(default_file_io_.get()) {}
bool BuffetConfig::LoadDefaults(weave::Settings* settings) {
// Keep this hardcoded default for sometime. This previously was set by
// libweave. It should be set by overlay's buffet.conf.
// Keys owners: avakulenko, gene, vitalybuka.
settings->client_id =
"338428340000-vkb4p6h40c7kja1k3l70kke8t615cjit.apps.googleusercontent."
"com";
settings->client_secret = "LS_iPYo_WIOE0m2VnLdduhnx";
settings->api_key = "AIzaSyACK3oZtmIylUKXiTMqkZqfuRiCgQmQSAQ";
settings->name = "Developer device";
settings->oem_name = "Chromium";
settings->model_name = "Brillo";
settings->model_id = "AAAAA";
if (!base::PathExists(options_.defaults))
return true; // Nothing to load.
brillo::KeyValueStore store;
if (!store.Load(options_.defaults))
return false;
bool result = LoadDefaults(store, settings);
settings->test_privet_ssid = options_.test_privet_ssid;
return result;
}
bool BuffetConfig::LoadDefaults(const brillo::KeyValueStore& store,
weave::Settings* settings) {
store.GetString(config_keys::kClientId, &settings->client_id);
store.GetString(config_keys::kClientSecret, &settings->client_secret);
store.GetString(config_keys::kApiKey, &settings->api_key);
store.GetString(config_keys::kOAuthURL, &settings->oauth_url);
store.GetString(config_keys::kServiceURL, &settings->service_url);
store.GetString(config_keys::kOemName, &settings->oem_name);
store.GetString(config_keys::kModelName, &settings->model_name);
store.GetString(config_keys::kModelId, &settings->model_id);
brillo::OsReleaseReader reader;
reader.Load();
if (!reader.GetString(kProductVersionKey, &settings->firmware_version)) {
LOG(ERROR) << "Could not read '" << kProductVersionKey << "' from OS";
}
store.GetBoolean(config_keys::kWifiAutoSetupEnabled,
&settings->wifi_auto_setup_enabled);
store.GetString(config_keys::kEmbeddedCode, &settings->embedded_code);
std::string modes_str;
if (store.GetString(config_keys::kPairingModes, &modes_str)) {
std::set<weave::PairingType> pairing_modes;
for (const std::string& mode :
brillo::string_utils::Split(modes_str, ",", true, true)) {
weave::PairingType pairing_mode;
if (!StringToEnum(mode, &pairing_mode))
return false;
pairing_modes.insert(pairing_mode);
}
settings->pairing_modes = std::move(pairing_modes);
}
store.GetString(config_keys::kName, &settings->name);
store.GetString(config_keys::kDescription, &settings->description);
store.GetString(config_keys::kLocation, &settings->location);
std::string role_str;
if (store.GetString(config_keys::kLocalAnonymousAccessRole, &role_str)) {
if (!StringToEnum(role_str, &settings->local_anonymous_access_role))
return false;
}
store.GetBoolean(config_keys::kLocalDiscoveryEnabled,
&settings->local_discovery_enabled);
store.GetBoolean(config_keys::kLocalPairingEnabled,
&settings->local_pairing_enabled);
store.GetBoolean(config_keys::kAllowEndpointsOverride,
&settings->allow_endpoints_override);
return true;
}
std::string BuffetConfig::LoadSettings(const std::string& name) {
std::string settings_blob;
base::FilePath path = CreatePath(name);
if (!file_io_->ReadFile(path, &settings_blob)) {
LOG(WARNING) << "Failed to read \'" + path.value() +
"\', proceeding with empty settings.";
return std::string();
}
std::string json_string;
if (!encryptor_->DecryptWithAuthentication(settings_blob, &json_string)) {
LOG(WARNING)
<< "Failed to decrypt settings, proceeding with empty settings.";
SaveSettings(std::string(), name, {});
return std::string();
}
return json_string;
}
std::string BuffetConfig::LoadSettings() {
return LoadSettings("");
}
void BuffetConfig::SaveSettings(const std::string& name,
const std::string& settings,
const weave::DoneCallback& callback) {
std::string encrypted_settings;
weave::ErrorPtr error;
base::FilePath path = CreatePath(name);
if (!encryptor_->EncryptWithAuthentication(settings, &encrypted_settings)) {
weave::Error::AddTo(&error, FROM_HERE, "file_write_error",
"Failed to encrypt settings.");
encrypted_settings.clear();
}
if (!file_io_->WriteFile(path, encrypted_settings)) {
weave::Error::AddTo(&error, FROM_HERE, "file_write_error",
"Failed to write \'" + path.value() +
"\', proceeding with empty settings.");
}
if (!callback.is_null()) {
base::MessageLoop::current()->PostTask(
FROM_HERE, base::Bind(callback, base::Passed(&error)));
}
}
base::FilePath BuffetConfig::CreatePath(const std::string& name) const {
return name.empty() ? options_.settings
: options_.settings.InsertBeforeExtension(
base::FilePath::kExtensionSeparator + name);
}
bool BuffetConfig::LoadFile(const base::FilePath& file_path,
std::string* data,
brillo::ErrorPtr* error) {
if (!file_io_->ReadFile(file_path, data)) {
brillo::errors::system::AddSystemError(error, FROM_HERE, errno);
brillo::Error::AddToPrintf(error, FROM_HERE, kErrorDomain, kFileReadError,
"Failed to read file '%s'",
file_path.value().c_str());
return false;
}
return true;
}
} // namespace buffet
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