1 /*
2  * Copyright (C) 2018 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 #ifndef CLEARKEY_JSON_WEB_KEY_H_
17 #define CLEARKEY_JSON_WEB_KEY_H_
18 
19 #include "jsmn.h"
20 #include "Utils.h"
21 #include "ClearKeyTypes.h"
22 
23 namespace android {
24 namespace hardware {
25 namespace drm {
26 namespace V1_2 {
27 namespace clearkey {
28 
29 class JsonWebKey {
30  public:
31     JsonWebKey();
32     virtual ~JsonWebKey();
33 
34     bool extractKeysFromJsonWebKeySet(const std::string& jsonWebKeySet,
35             KeyMap* keys);
36 
37  private:
38     std::vector<jsmntok_t> mJsmnTokens;
39     std::vector<std::string> mJsonObjects;
40     std::vector<std::string> mTokens;
41 
42     bool decodeBase64String(const std::string& encodedText,
43             std::vector<uint8_t>* decodedText);
44     bool findKey(const std::string& jsonObject, std::string* keyId,
45             std::string* encodedKey);
46     void findValue(const std::string &key, std::string* value);
47     bool isJsonWebKeySet(const std::string& jsonObject) const;
48     bool parseJsonObject(const std::string& jsonObject,
49             std::vector<std::string>* tokens);
50     bool parseJsonWebKeySet(const std::string& jsonWebKeySet,
51             std::vector<std::string>* jsonObjects);
52 
53     CLEARKEY_DISALLOW_COPY_AND_ASSIGN(JsonWebKey);
54 };
55 
56 } // namespace clearkey
57 } // namespace V1_2
58 } // namespace drm
59 } // namespace hardware
60 } // namespace android
61 
62 #endif  // CLEARKEY_JSON_WEB_KEY_H_
63