1 /*
2  * Copyright (C) 2014 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 <media/stagefright/foundation/ABase.h>
20 #include <utils/KeyedVector.h>
21 #include <utils/String8.h>
22 #include <utils/StrongPointer.h>
23 
24 #include "jsmn.h"
25 #include "Utils.h"
26 #include "ClearKeyTypes.h"
27 
28 namespace clearkeydrm {
29 
30 using android::KeyedVector;
31 using android::sp;
32 using android::String8;
33 using android::Vector;
34 
35 class JsonWebKey {
36  public:
37     JsonWebKey();
38     virtual ~JsonWebKey();
39 
40     bool extractKeysFromJsonWebKeySet(const String8& jsonWebKeySet,
41             KeyMap* keys);
42 
43  private:
44     Vector<jsmntok_t> mJsmnTokens;
45     Vector<String8> mJsonObjects;
46     Vector<String8> mTokens;
47 
48     bool decodeBase64String(const String8& encodedText,
49             Vector<uint8_t>* decodedText);
50     bool findKey(const String8& jsonObject, String8* keyId,
51             String8* encodedKey);
52     void findValue(const String8 &key, String8* value);
53     bool isJsonWebKeySet(const String8& jsonObject) const;
54     bool parseJsonObject(const String8& jsonObject, Vector<String8>* tokens);
55     bool parseJsonWebKeySet(const String8& jsonWebKeySet, Vector<String8>* jsonObjects);
56 
57     DISALLOW_EVIL_CONSTRUCTORS(JsonWebKey);
58 };
59 
60 }  // namespace clearkeydrm
61 
62 #endif  // CLEARKEY_JSON_WEB_KEY_H_
63