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      1 /*
      2  * Copyright (C) 2010 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 __DRM_MANAGER_SERVICE_H__
     18 #define __DRM_MANAGER_SERVICE_H__
     19 
     20 #include <utils/RefBase.h>
     21 #include <utils/KeyedVector.h>
     22 #include <binder/IInterface.h>
     23 #include <binder/Parcel.h>
     24 #include "IDrmManagerService.h"
     25 #include "IDrmServiceListener.h"
     26 
     27 namespace android {
     28 
     29 class DrmManager;
     30 class String8;
     31 class Mutex;
     32 
     33 /**
     34  * This is the implementation class for DRM manager service. This delegates
     35  * the responsibility to DrmManager.
     36  *
     37  * The instance of this class is created while starting the DRM manager service.
     38  *
     39  */
     40 class DrmManagerService : public BnDrmManagerService {
     41 public:
     42     static void instantiate();
     43 
     44 private:
     45     enum drm_perm_t {
     46         CONSUME_RIGHTS          = 0,
     47         SET_PLAYBACK_STATUS     = 1,
     48         OPEN_DECRYPT_SESSION    = 2,
     49         CLOSE_DECRYPT_SESSION   = 3,
     50         INITIALIZE_DECRYPT_UNIT = 4,
     51         DECRYPT                 = 5,
     52         FINALIZE_DECRYPT_UNIT   = 6,
     53         PREAD                   = 7,
     54     };
     55 
     56     static const char *const drm_perm_labels[];
     57 
     58     DrmManagerService();
     59     virtual ~DrmManagerService();
     60 
     61     static const char *get_perm_label(drm_perm_t perm);
     62 
     63     static bool selinuxIsProtectedCallAllowed(pid_t spid, drm_perm_t perm);
     64 
     65     static bool isProtectedCallAllowed(drm_perm_t perm);
     66 
     67 public:
     68     int addUniqueId(bool isNative);
     69 
     70     void removeUniqueId(int uniqueId);
     71 
     72     void addClient(int uniqueId);
     73 
     74     void removeClient(int uniqueId);
     75 
     76     status_t setDrmServiceListener(
     77             int uniqueId, const sp<IDrmServiceListener>& drmServiceListener);
     78 
     79     DrmConstraints* getConstraints(int uniqueId, const String8* path, const int action);
     80 
     81     DrmMetadata* getMetadata(int uniqueId, const String8* path);
     82 
     83     bool canHandle(int uniqueId, const String8& path, const String8& mimeType);
     84 
     85     DrmInfoStatus* processDrmInfo(int uniqueId, const DrmInfo* drmInfo);
     86 
     87     DrmInfo* acquireDrmInfo(int uniqueId, const DrmInfoRequest* drmInforequest);
     88 
     89     status_t saveRights(int uniqueId, const DrmRights& drmRights,
     90             const String8& rightsPath, const String8& contentPath);
     91 
     92     String8 getOriginalMimeType(int uniqueId, const String8& path, int fd);
     93 
     94     int getDrmObjectType(int uniqueId, const String8& path, const String8& mimeType);
     95 
     96     int checkRightsStatus(int uniqueId, const String8& path,int action);
     97 
     98     status_t consumeRights(int uniqueId, DecryptHandle* decryptHandle, int action, bool reserve);
     99 
    100     status_t setPlaybackStatus(
    101             int uniqueId, DecryptHandle* decryptHandle, int playbackStatus, int64_t position);
    102 
    103     bool validateAction(int uniqueId, const String8& path,
    104             int action, const ActionDescription& description);
    105 
    106     status_t removeRights(int uniqueId, const String8& path);
    107 
    108     status_t removeAllRights(int uniqueId);
    109 
    110     int openConvertSession(int uniqueId, const String8& mimeType);
    111 
    112     DrmConvertedStatus* convertData(int uniqueId, int convertId, const DrmBuffer* inputData);
    113 
    114     DrmConvertedStatus* closeConvertSession(int uniqueId, int convertId);
    115 
    116     status_t getAllSupportInfo(int uniqueId, int* length, DrmSupportInfo** drmSupportInfoArray);
    117 
    118     DecryptHandle* openDecryptSession(
    119         int uniqueId, int fd, off64_t offset, off64_t length, const char *mime);
    120 
    121     DecryptHandle* openDecryptSession(
    122         int uniqueId, const char* uri, const char* mime);
    123 
    124     DecryptHandle* openDecryptSession(int uniqueId, const DrmBuffer& buf,
    125             const String8& mimeType);
    126 
    127     status_t closeDecryptSession(int uniqueId, DecryptHandle* decryptHandle);
    128 
    129     status_t initializeDecryptUnit(int uniqueId, DecryptHandle* decryptHandle,
    130             int decryptUnitId, const DrmBuffer* headerInfo);
    131 
    132     status_t decrypt(int uniqueId, DecryptHandle* decryptHandle, int decryptUnitId,
    133             const DrmBuffer* encBuffer, DrmBuffer** decBuffer, DrmBuffer* IV);
    134 
    135     status_t finalizeDecryptUnit(int uniqueId, DecryptHandle* decryptHandle, int decryptUnitId);
    136 
    137     ssize_t pread(int uniqueId, DecryptHandle* decryptHandle,
    138             void* buffer, ssize_t numBytes, off64_t offset);
    139 
    140     virtual status_t dump(int fd, const Vector<String16>& args);
    141 
    142 private:
    143     DrmManager* mDrmManager;
    144 };
    145 
    146 };
    147 
    148 #endif /* __DRM_MANAGER_SERVICE_H__ */
    149 
    150