1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef CLEAR_KEY_FETCHER_H_ 18 #define CLEAR_KEY_FETCHER_H_ 19 20 #include <vector> 21 22 #include "protos/license_protos.pb.h" 23 24 #include <media/stagefright/foundation/ABase.h> 25 #include "KeyFetcher.h" 26 27 namespace android { 28 namespace clearkeycas { 29 30 class LicenseFetcher; 31 32 class ClearKeyFetcher : public KeyFetcher { 33 public: 34 // ClearKeyFetcher takes ownership of |license_fetcher|. 35 explicit ClearKeyFetcher( 36 std::unique_ptr<LicenseFetcher> license_fetcher); 37 38 virtual ~ClearKeyFetcher(); 39 40 // Initializes the fetcher. Must be called before ObtainKey. 41 status_t Init() override; 42 43 // Obtains the |asset_id| and |keys| from the Ecm contained in |ecm|. 44 // Returns 45 // - errors returned by EcmContainer::Parse. 46 // - errors returned by ClassicLicenseFetcher::FetchLicense. 47 // - errors returned by Ecm::Decrypt. 48 // |asset_id| and |keys| are owned by the caller and cannot be null. 49 // Init() must have been called. 50 status_t ObtainKey(const sp<ABuffer>& ecm, uint64_t* asset_id, 51 std::vector<KeyInfo>* keys) override; 52 53 private: 54 clearkeycas::Asset asset_; 55 bool initialized_; 56 std::unique_ptr<LicenseFetcher> license_fetcher_; 57 58 DISALLOW_EVIL_CONSTRUCTORS(ClearKeyFetcher); 59 }; 60 61 } // namespace clearkeycas 62 } // namespace android 63 64 #endif // CLEAR_KEY_FETCHER_H_ 65