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/*
* Copyright 2020 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.
*/
/* BluetoothKeystore Interface */
#include "btif_keystore.h"
#include <base/bind.h>
#include <base/location.h>
#include <base/logging.h>
#include <hardware/bluetooth.h>
#include <map>
#include "btif_common.h"
#include "btif_storage.h"
#include "gd/os/parameter_provider.h"
#include "main/shim/config.h"
#include "main/shim/shim.h"
using base::Bind;
using base::Unretained;
using bluetooth::bluetooth_keystore::BluetoothKeystoreCallbacks;
using bluetooth::bluetooth_keystore::BluetoothKeystoreInterface;
namespace bluetooth {
namespace bluetooth_keystore {
class BluetoothKeystoreInterfaceImpl;
std::unique_ptr<BluetoothKeystoreInterface> bluetoothKeystoreInstance;
const int CONFIG_COMPARE_ALL_PASS = 0b11;
class BluetoothKeystoreInterfaceImpl
: public bluetooth::bluetooth_keystore::BluetoothKeystoreInterface {
~BluetoothKeystoreInterfaceImpl() override = default;
void init(BluetoothKeystoreCallbacks* callbacks) override {
VLOG(2) << __func__;
this->callbacks = callbacks;
bluetooth::os::ParameterProvider::SetCommonCriteriaConfigCompareResult(
CONFIG_COMPARE_ALL_PASS);
ConvertEncryptOrDecryptKeyIfNeeded();
}
void ConvertEncryptOrDecryptKeyIfNeeded() {
VLOG(2) << __func__;
if (!callbacks) {
LOG(INFO) << __func__ << " callback isn't ready.";
return;
}
if (bluetooth::shim::is_any_gd_enabled()) {
do_in_jni_thread(
FROM_HERE, base::Bind([]() {
shim::BtifConfigInterface::ConvertEncryptOrDecryptKeyIfNeeded();
}));
return;
}
do_in_jni_thread(
FROM_HERE, base::Bind([]() { btif_storage_get_num_bonded_devices(); }));
}
bool set_encrypt_key_or_remove_key(std::string prefix,
std::string decryptedString) override {
VLOG(2) << __func__ << " prefix: " << prefix;
if (!callbacks) {
LOG(WARNING) << __func__ << " callback isn't ready. prefix: " << prefix;
return false;
}
// Save the value into a map.
key_map[prefix] = decryptedString;
do_in_jni_thread(
base::Bind(&bluetooth::bluetooth_keystore::BluetoothKeystoreCallbacks::
set_encrypt_key_or_remove_key,
base::Unretained(callbacks), prefix, decryptedString));
return true;
}
std::string get_key(std::string prefix) override {
VLOG(2) << __func__ << " prefix: " << prefix;
if (!callbacks) {
LOG(WARNING) << __func__ << " callback isn't ready. prefix: " << prefix;
return "";
}
std::string decryptedString;
// try to find the key.
std::map<std::string, std::string>::iterator iter = key_map.find(prefix);
if (iter == key_map.end()) {
decryptedString = callbacks->get_key(prefix);
// Save the value into a map.
key_map[prefix] = decryptedString;
VLOG(2) << __func__ << ": get key from bluetoothkeystore.";
} else {
decryptedString = iter->second;
}
return decryptedString;
}
void clear_map() override {
VLOG(2) << __func__;
std::map<std::string, std::string> empty_map;
key_map.swap(empty_map);
key_map.clear();
}
private:
BluetoothKeystoreCallbacks* callbacks = nullptr;
std::map<std::string, std::string> key_map;
};
BluetoothKeystoreInterface* getBluetoothKeystoreInterface() {
if (!bluetoothKeystoreInstance) {
bluetoothKeystoreInstance.reset(new BluetoothKeystoreInterfaceImpl());
}
return bluetoothKeystoreInstance.get();
}
} // namespace bluetooth_keystore
} // namespace bluetooth
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