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/*
* Copyright (C) 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.
*/
#ifndef KEYSTORE_OPERATION_H_
#define KEYSTORE_OPERATION_H_
#include <hardware/keymaster1.h>
#include <binder/Binder.h>
#include <binder/IBinder.h>
#include <utils/LruCache.h>
#include <utils/StrongPointer.h>
#include <map>
#include <vector>
namespace android {
struct keymaster_key_characteristics_t_Delete {
void operator()(keymaster_key_characteristics_t* characteristics) const {
keymaster_free_characteristics(characteristics);
delete characteristics;
}
};
typedef std::unique_ptr<keymaster_key_characteristics_t, keymaster_key_characteristics_t_Delete>
Unique_keymaster_key_characteristics;
/**
* OperationMap handles the translation of keymaster_operation_handle_t's and
* keymaster1_device_t's to opaque binder tokens that can be used to reference
* that operation at a later time by applications. It also does LRU tracking
* for operation pruning and keeps a mapping of clients to operations to allow
* for graceful handling of application death.
*/
class OperationMap {
public:
OperationMap(IBinder::DeathRecipient* deathRecipient);
sp<IBinder> addOperation(keymaster_operation_handle_t handle,
const keymaster1_device_t* dev, sp<IBinder> appToken,
keymaster_key_characteristics_t* characteristics, bool pruneable);
bool getOperation(sp<IBinder> token, keymaster_operation_handle_t* outHandle,
const keymaster1_device_t** outDev,
const keymaster_key_characteristics_t** outCharacteristics);
bool removeOperation(sp<IBinder> token);
bool hasPruneableOperation();
sp<IBinder> getOldestPruneableOperation();
std::vector<sp<IBinder>> getOperationsForToken(sp<IBinder> appToken);
private:
void updateLru(sp<IBinder> token);
void removeOperationTracking(sp<IBinder> token, sp<IBinder> appToken);
struct Operation {
Operation();
Operation(keymaster_operation_handle_t handle, const keymaster1_device_t* device,
keymaster_key_characteristics_t* characteristics, sp<IBinder> appToken);
keymaster_operation_handle_t handle;
const keymaster1_device_t* device;
Unique_keymaster_key_characteristics characteristics;
sp<IBinder> appToken;
};
std::map<sp<IBinder>, struct Operation> mMap;
std::vector<sp<IBinder>> mLru;
std::map<sp<IBinder>, std::vector<sp<IBinder>>> mAppTokenMap;
IBinder::DeathRecipient* mDeathRecipient;
};
} // namespace android
#endif
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