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
27namespace android {
28namespace clearkeycas {
29
30class LicenseFetcher;
31
32class ClearKeyFetcher : public KeyFetcher {
33public:
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
53private:
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