| /* |
| * 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 <binder/Binder.h> |
| #include <binder/IBinder.h> |
| #include <keystore/keymaster_tags.h> |
| #include <map> |
| #include <utils/LruCache.h> |
| #include <utils/StrongPointer.h> |
| #include <vector> |
| |
| namespace keystore { |
| |
| using ::android::IBinder; |
| using ::android::sp; |
| |
| /** |
| * OperationMap handles the translation of uint64_t's and keymaster2_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 { |
| typedef ::android::sp<::android::hardware::keymaster::V3_0::IKeymasterDevice> km_device_t; |
| |
| public: |
| explicit OperationMap(IBinder::DeathRecipient* deathRecipient); |
| android::sp<android::IBinder> addOperation(uint64_t handle, uint64_t keyid, KeyPurpose purpose, |
| const km_device_t& dev, |
| const android::sp<android::IBinder>& appToken, |
| KeyCharacteristics&& characteristics, |
| bool pruneable); |
| bool getOperation(const android::sp<android::IBinder>& token, uint64_t* outHandle, |
| uint64_t* outKeyid, KeyPurpose* outPurpose, km_device_t* outDev, |
| const KeyCharacteristics** outCharacteristics); |
| bool removeOperation(const android::sp<android::IBinder>& token); |
| bool hasPruneableOperation() const; |
| size_t getOperationCount() const { return mMap.size(); } |
| size_t getPruneableOperationCount() const; |
| bool getOperationAuthToken(const android::sp<android::IBinder>& token, |
| const HardwareAuthToken** outToken); |
| bool setOperationAuthToken(const android::sp<android::IBinder>& token, |
| const HardwareAuthToken* authToken); |
| android::sp<android::IBinder> getOldestPruneableOperation(); |
| std::vector<android::sp<android::IBinder>> |
| getOperationsForToken(const android::sp<android::IBinder>& appToken); |
| |
| private: |
| void updateLru(const android::sp<android::IBinder>& token); |
| void removeOperationTracking(const android::sp<android::IBinder>& token, |
| const android::sp<android::IBinder>& appToken); |
| struct Operation { |
| Operation(); |
| Operation(uint64_t handle, uint64_t keyid, KeyPurpose purpose, const km_device_t& device, |
| KeyCharacteristics&& characteristics, android::sp<android::IBinder> appToken); |
| uint64_t handle; |
| uint64_t keyid; |
| KeyPurpose purpose; |
| km_device_t device; |
| KeyCharacteristics characteristics; |
| android::sp<android::IBinder> appToken; |
| std::unique_ptr<HardwareAuthToken> authToken; |
| }; |
| std::map<android::sp<android::IBinder>, Operation> mMap; |
| std::vector<android::sp<android::IBinder>> mLru; |
| std::map<android::sp<android::IBinder>, std::vector<android::sp<android::IBinder>>> |
| mAppTokenMap; |
| android::IBinder::DeathRecipient* mDeathRecipient; |
| }; |
| |
| } // namespace keystore |
| |
| #endif |