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      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 CLEARKEY_CAS_PLUGIN_H_
     18 #define CLEARKEY_CAS_PLUGIN_H_
     19 
     20 #include <media/cas/CasAPI.h>
     21 #include <media/cas/DescramblerAPI.h>
     22 #include <utils/Mutex.h>
     23 #include <utils/StrongPointer.h>
     24 
     25 extern "C" {
     26       android::CasFactory *createCasFactory();
     27       android::DescramblerFactory *createDescramblerFactory();
     28 }
     29 
     30 namespace android {
     31 namespace clearkeycas {
     32 
     33 class KeyFetcher;
     34 class ClearKeyCasSession;
     35 
     36 class ClearKeyCasFactory : public CasFactory {
     37 public:
     38     ClearKeyCasFactory() {}
     39     virtual ~ClearKeyCasFactory() {}
     40 
     41     virtual bool isSystemIdSupported(
     42             int32_t CA_system_id) const override;
     43     virtual status_t queryPlugins(
     44             std::vector<CasPluginDescriptor> *descriptors) const override;
     45     virtual status_t createPlugin(
     46             int32_t CA_system_id,
     47             void *appData,
     48             CasPluginCallback callback,
     49             CasPlugin **plugin) override;
     50     virtual status_t createPlugin(
     51             int32_t CA_system_id,
     52             void *appData,
     53             CasPluginCallbackExt callback,
     54             CasPlugin **plugin) override;
     55 };
     56 
     57 class ClearKeyDescramblerFactory : public DescramblerFactory {
     58 public:
     59     ClearKeyDescramblerFactory() {}
     60     virtual ~ClearKeyDescramblerFactory() {}
     61 
     62     virtual bool isSystemIdSupported(
     63             int32_t CA_system_id) const override;
     64     virtual status_t createPlugin(
     65             int32_t CA_system_id, DescramblerPlugin **plugin) override;
     66 };
     67 
     68 class ClearKeyCasPlugin : public CasPlugin {
     69 public:
     70     ClearKeyCasPlugin(void *appData, CasPluginCallback callback);
     71     ClearKeyCasPlugin(void *appData, CasPluginCallbackExt callback);
     72     virtual ~ClearKeyCasPlugin();
     73 
     74     virtual status_t setPrivateData(
     75             const CasData &data) override;
     76 
     77     virtual status_t openSession(CasSessionId *sessionId) override;
     78 
     79     virtual status_t closeSession(
     80             const CasSessionId &sessionId) override;
     81 
     82     virtual status_t setSessionPrivateData(
     83             const CasSessionId &sessionId,
     84             const CasData &data) override;
     85 
     86     virtual status_t processEcm(
     87             const CasSessionId &sessionId, const CasEcm &ecm) override;
     88 
     89     virtual status_t processEmm(const CasEmm &emm) override;
     90 
     91     virtual status_t sendEvent(
     92             int32_t event, int32_t arg, const CasData &eventData) override;
     93 
     94     virtual status_t sendSessionEvent(
     95             const CasSessionId &sessionId,
     96             int32_t event, int32_t arg, const CasData &eventData) override;
     97 
     98     virtual status_t provision(const String8 &str) override;
     99 
    100     virtual status_t refreshEntitlements(
    101             int32_t refreshType, const CasData &refreshData) override;
    102 
    103 private:
    104     Mutex mKeyFetcherLock;
    105     std::unique_ptr<KeyFetcher> mKeyFetcher;
    106     CasPluginCallback mCallback;
    107     CasPluginCallbackExt mCallbackExt;
    108     void* mAppData;
    109 };
    110 
    111 class ClearKeyDescramblerPlugin : public DescramblerPlugin {
    112 public:
    113     ClearKeyDescramblerPlugin() {}
    114     virtual ~ClearKeyDescramblerPlugin() {};
    115 
    116     virtual bool requiresSecureDecoderComponent(
    117             const char *mime) const override;
    118 
    119     virtual status_t setMediaCasSession(
    120             const CasSessionId &sessionId) override;
    121 
    122     virtual ssize_t descramble(
    123             bool secure,
    124             ScramblingControl scramblingControl,
    125             size_t numSubSamples,
    126             const SubSample *subSamples,
    127             const void *srcPtr,
    128             int32_t srcOffset,
    129             void *dstPtr,
    130             int32_t dstOffset,
    131             AString *errorDetailMsg) override;
    132 
    133 private:
    134     std::shared_ptr<ClearKeyCasSession> mCASSession;
    135 
    136     String8 subSamplesToString(
    137             SubSample const *subSamples,
    138             size_t numSubSamples) const;
    139     String8 arrayToString(uint8_t const *array, size_t len) const;
    140 };
    141 
    142 } // namespace clearkeycas
    143 } // namespace android
    144 
    145 #endif // CLEARKEY_CAS_PLUGIN_H_
    146