You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
2.6 KiB
99 lines
2.6 KiB
4 months ago
|
/*
|
||
|
* Copyright (C) 2017 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_SESSION_LIBRARY_H_
|
||
|
#define CLEARKEY_SESSION_LIBRARY_H_
|
||
|
|
||
|
#include <media/cas/CasAPI.h>
|
||
|
#include <media/cas/DescramblerAPI.h>
|
||
|
#include <openssl/aes.h>
|
||
|
#include <utils/KeyedVector.h>
|
||
|
#include <utils/Mutex.h>
|
||
|
|
||
|
namespace android {
|
||
|
struct ABuffer;
|
||
|
|
||
|
namespace clearkeycas {
|
||
|
class KeyFetcher;
|
||
|
|
||
|
class ClearKeyCasSession {
|
||
|
public:
|
||
|
explicit ClearKeyCasSession(CasPlugin *plugin);
|
||
|
|
||
|
virtual ~ClearKeyCasSession();
|
||
|
|
||
|
ssize_t decrypt(
|
||
|
bool secure,
|
||
|
DescramblerPlugin::ScramblingControl scramblingControl,
|
||
|
size_t numSubSamples,
|
||
|
const DescramblerPlugin::SubSample *subSamples,
|
||
|
const void *srcPtr,
|
||
|
void *dstPtr,
|
||
|
AString * /* errorDetailMsg */);
|
||
|
|
||
|
status_t updateECM(KeyFetcher *keyFetcher, void *ecm, size_t size);
|
||
|
|
||
|
private:
|
||
|
enum {
|
||
|
kNumKeys = 2,
|
||
|
};
|
||
|
struct KeyInfo {
|
||
|
bool valid;
|
||
|
AES_KEY contentKey;
|
||
|
};
|
||
|
sp<ABuffer> mEcmBuffer;
|
||
|
Mutex mKeyLock;
|
||
|
CasPlugin* mPlugin;
|
||
|
KeyInfo mKeyInfo[kNumKeys];
|
||
|
|
||
|
friend class ClearKeySessionLibrary;
|
||
|
|
||
|
CasPlugin* getPlugin() const { return mPlugin; }
|
||
|
status_t decryptPayload(
|
||
|
const AES_KEY& key, size_t length, size_t offset, char* buffer) const;
|
||
|
|
||
|
DISALLOW_EVIL_CONSTRUCTORS(ClearKeyCasSession);
|
||
|
};
|
||
|
|
||
|
class ClearKeySessionLibrary {
|
||
|
public:
|
||
|
static ClearKeySessionLibrary* get();
|
||
|
|
||
|
status_t addSession(CasPlugin *plugin, CasSessionId *sessionId);
|
||
|
|
||
|
std::shared_ptr<ClearKeyCasSession> findSession(const CasSessionId& sessionId);
|
||
|
|
||
|
void destroySession(const CasSessionId& sessionId);
|
||
|
|
||
|
void destroyPlugin(CasPlugin *plugin);
|
||
|
|
||
|
private:
|
||
|
static Mutex sSingletonLock;
|
||
|
static ClearKeySessionLibrary* sSingleton;
|
||
|
|
||
|
Mutex mSessionsLock;
|
||
|
uint32_t mNextSessionId;
|
||
|
KeyedVector<CasSessionId, std::shared_ptr<ClearKeyCasSession>> mIDToSessionMap;
|
||
|
|
||
|
ClearKeySessionLibrary();
|
||
|
DISALLOW_EVIL_CONSTRUCTORS(ClearKeySessionLibrary);
|
||
|
};
|
||
|
|
||
|
} // namespace clearkeycas
|
||
|
} // namespace android
|
||
|
|
||
|
#endif // CLEARKEY_SESSION_LIBRARY_H_
|