drm/mediadrm/plugins/clearkey/hidl/include/JsonWebKey.h

/*
 * Copyright (C) 2018 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 CLEARKEY_JSON_WEB_KEY_H_
#define CLEARKEY_JSON_WEB_KEY_H_

#include "jsmn.h"
#include "Utils.h"
#include "ClearKeyTypes.h"

namespace android {
namespace hardware {
namespace drm {
namespace V1_2 {
namespace clearkey {

class JsonWebKey {
 public:
    JsonWebKey();
    virtual ~JsonWebKey();

    bool extractKeysFromJsonWebKeySet(const std::string& jsonWebKeySet,
            KeyMap* keys);

 private:
    std::vector<jsmntok_t> mJsmnTokens;
    std::vector<std::string> mJsonObjects;
    std::vector<std::string> mTokens;

    bool decodeBase64String(const std::string& encodedText,
            std::vector<uint8_t>* decodedText);
    bool findKey(const std::string& jsonObject, std::string* keyId,
            std::string* encodedKey);
    void findValue(const std::string &key, std::string* value);
    bool isJsonWebKeySet(const std::string& jsonObject) const;
    bool parseJsonObject(const std::string& jsonObject,
            std::vector<std::string>* tokens);
    bool parseJsonWebKeySet(const std::string& jsonWebKeySet,
            std::vector<std::string>* jsonObjects);

    CLEARKEY_DISALLOW_COPY_AND_ASSIGN(JsonWebKey);
};

} // namespace clearkey
} // namespace V1_2
} // namespace drm
} // namespace hardware
} // namespace android

#endif  // CLEARKEY_JSON_WEB_KEY_H_