/* * Copyright (C) 2010 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 __DRM_ENGINE_BASE_H__ #define __DRM_ENGINE_BASE_H__ #include #include "IDrmEngine.h" namespace android { /** * This class is an interface for plug-in developers * * Responsibility of this class is control the sequence of actual plug-in. * All each plug-in developer has to do is implement onXXX() type virtual interfaces. */ class DrmEngineBase : public IDrmEngine { public: DrmEngineBase(); virtual ~DrmEngineBase(); public: DrmConstraints* getConstraints(int uniqueId, const String8* path, int action); DrmMetadata* getMetadata(int uniqueId, const String8* path); status_t initialize(int uniqueId); status_t setOnInfoListener(int uniqueId, const IDrmEngine::OnInfoListener* infoListener); status_t terminate(int uniqueId); bool canHandle(int uniqueId, const String8& path); DrmInfoStatus* processDrmInfo(int uniqueId, const DrmInfo* drmInfo); status_t saveRights(int uniqueId, const DrmRights& drmRights, const String8& rightsPath, const String8& contentPath); DrmInfo* acquireDrmInfo(int uniqueId, const DrmInfoRequest* drmInfoRequest); String8 getOriginalMimeType(int uniqueId, const String8& path, int fd); int getDrmObjectType(int uniqueId, const String8& path, const String8& mimeType); int checkRightsStatus(int uniqueId, const String8& path, int action); status_t consumeRights(int uniqueId, sp& decryptHandle, int action, bool reserve); status_t setPlaybackStatus( int uniqueId, sp& decryptHandle, int playbackStatus, int64_t position); bool validateAction( int uniqueId, const String8& path, int action, const ActionDescription& description); status_t removeRights(int uniqueId, const String8& path); status_t removeAllRights(int uniqueId); status_t openConvertSession(int uniqueId, int convertId); DrmConvertedStatus* convertData(int uniqueId, int convertId, const DrmBuffer* inputData); DrmConvertedStatus* closeConvertSession(int uniqueId, int convertId); DrmSupportInfo* getSupportInfo(int uniqueId); status_t openDecryptSession( int uniqueId, sp& decryptHandle, int fd, off64_t offset, off64_t length, const char* mime); status_t openDecryptSession( int uniqueId, sp& decryptHandle, const char* uri, const char* mime); status_t openDecryptSession(int uniqueId, sp& decryptHandle, const DrmBuffer& buf, const String8& mimeType); status_t closeDecryptSession(int uniqueId, sp& decryptHandle); status_t initializeDecryptUnit(int uniqueId, sp& decryptHandle, int decryptUnitId, const DrmBuffer* headerInfo); status_t decrypt(int uniqueId, sp& decryptHandle, int decryptUnitId, const DrmBuffer* encBuffer, DrmBuffer** decBuffer, DrmBuffer* IV); status_t finalizeDecryptUnit(int uniqueId, sp& decryptHandle, int decryptUnitId); ssize_t pread(int uniqueId, sp& decryptHandle, void* buffer, ssize_t numBytes, off64_t offset); protected: ///////////////////////////////////////////////////// // Interface for plug-in developers // // each plug-in has to implement following method // ///////////////////////////////////////////////////// /** * Get constraint information associated with input content * * @param[in] uniqueId Unique identifier for a session * @param[in] path Path of the protected content * @param[in] action Actions defined such as, * Action::DEFAULT, Action::PLAY, etc * @return DrmConstraints * key-value pairs of constraint are embedded in it * @note * In case of error, return NULL */ virtual DrmConstraints* onGetConstraints( int uniqueId, const String8* path, int action) = 0; /** * Get metadata information associated with input content * * @param[in] uniqueId Unique identifier for a session * @param[in] path Path of the protected content * @return DrmMetadata * key-value pairs of metadata * @note * In case of error, return NULL */ virtual DrmMetadata* onGetMetadata(int uniqueId, const String8* path) = 0; /** * Initialize plug-in * * @param[in] uniqueId Unique identifier for a session * @return status_t * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure */ virtual status_t onInitialize(int uniqueId) = 0; /** * Register a callback to be invoked when the caller required to * receive necessary information * * @param[in] uniqueId Unique identifier for a session. uniqueId is a random * number generated in the DRM service. If the DrmManagerClient * is created in native code, uniqueId will be a number ranged * from 0x1000 to 0x1fff. If it comes from Java code, the uniqueId * will be a number ranged from 0x00 to 0xfff. So bit 0x1000 in * uniqueId could be used in DRM plugins to differentiate native * OnInfoListener and Java OnInfoListener. * @param[in] infoListener Listener * @return status_t * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure */ virtual status_t onSetOnInfoListener( int uniqueId, const IDrmEngine::OnInfoListener* infoListener) = 0; /** * Terminate the plug-in * and release resource bound to plug-in * * @param[in] uniqueId Unique identifier for a session * @return status_t * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure */ virtual status_t onTerminate(int uniqueId) = 0; /** * Get whether the given content can be handled by this plugin or not * * @param[in] uniqueId Unique identifier for a session * @param[in] path Path the protected object * @return bool * Returns true if this plugin can handle , false in case of not able to handle */ virtual bool onCanHandle(int uniqueId, const String8& path) = 0; /** * Executes given drm information based on its type * * @param[in] uniqueId Unique identifier for a session * @param[in] drmInfo Information needs to be processed * @return DrmInfoStatus * instance as a result of processing given input */ virtual DrmInfoStatus* onProcessDrmInfo(int uniqueId, const DrmInfo* drmInfo) = 0; /** * Save DRM rights to specified rights path * and make association with content path * * @param[in] uniqueId Unique identifier for a session * @param[in] drmRights DrmRights to be saved * @param[in] rightsPath File path where rights to be saved * @param[in] contentPath File path where content was saved * @return status_t * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure */ virtual status_t onSaveRights(int uniqueId, const DrmRights& drmRights, const String8& rightspath, const String8& contentPath) = 0; /** * Retrieves necessary information for registration, unregistration or rights * acquisition information. * * @param[in] uniqueId Unique identifier for a session * @param[in] drmInfoRequest Request information to retrieve drmInfo * @return DrmInfo * instance as a result of processing given input */ virtual DrmInfo* onAcquireDrmInfo(int uniqueId, const DrmInfoRequest* drmInforequest) = 0; /** * Retrieves the mime type embedded inside the original content * * @param[in] uniqueId Unique identifier for a session * @param[in] path Path of the protected content * @param[in] fd descriptor of the protected content as a file source * @return String8 * Returns mime-type of the original content, such as "video/mpeg" */ virtual String8 onGetOriginalMimeType(int uniqueId, const String8& path, int fd) = 0; /** * Retrieves the type of the protected object (content, rights, etc..) * using specified path or mimetype. At least one parameter should be non null * to retrieve DRM object type * * @param[in] uniqueId Unique identifier for a session * @param[in] path Path of the content or null. * @param[in] mimeType Mime type of the content or null. * @return type of the DRM content, * such as DrmObjectType::CONTENT, DrmObjectType::RIGHTS_OBJECT */ virtual int onGetDrmObjectType( int uniqueId, const String8& path, const String8& mimeType) = 0; /** * Check whether the given content has valid rights or not * * @param[in] uniqueId Unique identifier for a session * @param[in] path Path of the protected content * @param[in] action Action to perform (Action::DEFAULT, Action::PLAY, etc) * @return the status of the rights for the protected content, * such as RightsStatus::RIGHTS_VALID, RightsStatus::RIGHTS_EXPIRED, etc. */ virtual int onCheckRightsStatus(int uniqueId, const String8& path, int action) = 0; /** * Consumes the rights for a content. * If the reserve parameter is true the rights is reserved until the same * application calls this api again with the reserve parameter set to false. * * @param[in] uniqueId Unique identifier for a session * @param[in] decryptHandle Handle for the decryption session * @param[in] action Action to perform. (Action::DEFAULT, Action::PLAY, etc) * @param[in] reserve True if the rights should be reserved. * @return status_t * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure */ virtual status_t onConsumeRights(int uniqueId, sp& decryptHandle, int action, bool reserve) = 0; /** * Informs the DRM Engine about the playback actions performed on the DRM files. * * @param[in] uniqueId Unique identifier for a session * @param[in] decryptHandle Handle for the decryption session * @param[in] playbackStatus Playback action (Playback::START, Playback::STOP, Playback::PAUSE) * @param[in] position Position in the file (in milliseconds) where the start occurs. * Only valid together with Playback::START. * @return status_t * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure */ virtual status_t onSetPlaybackStatus( int uniqueId, sp& decryptHandle, int playbackStatus, int64_t position) = 0; /** * Validates whether an action on the DRM content is allowed or not. * * @param[in] uniqueId Unique identifier for a session * @param[in] path Path of the protected content * @param[in] action Action to validate (Action::PLAY, Action::TRANSFER, etc) * @param[in] description Detailed description of the action * @return true if the action is allowed. */ virtual bool onValidateAction(int uniqueId, const String8& path, int action, const ActionDescription& description) = 0; /** * Removes the rights associated with the given protected content * * @param[in] uniqueId Unique identifier for a session * @param[in] path Path of the protected content * @return status_t * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure */ virtual status_t onRemoveRights(int uniqueId, const String8& path) = 0; /** * Removes all the rights information of each plug-in associated with * DRM framework. * * @param[in] uniqueId Unique identifier for a session * @return status_t * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure */ virtual status_t onRemoveAllRights(int uniqueId) = 0; /** * This API is for Forward Lock based DRM scheme. * Each time the application tries to download a new DRM file * which needs to be converted, then the application has to * begin with calling this API. * * @param[in] uniqueId Unique identifier for a session * @param[in] convertId Handle for the convert session * @return status_t * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure */ virtual status_t onOpenConvertSession(int uniqueId, int convertId) = 0; /** * Accepts and converts the input data which is part of DRM file. * The resultant converted data and the status is returned in the DrmConvertedInfo * object. This method will be called each time there are new block * of data received by the application. * * @param[in] uniqueId Unique identifier for a session * @param[in] convertId Handle for the convert session * @param[in] inputData Input Data which need to be converted * @return Return object contains the status of the data conversion, * the output converted data and offset. In this case the * application will ignore the offset information. */ virtual DrmConvertedStatus* onConvertData( int uniqueId, int convertId, const DrmBuffer* inputData) = 0; /** * Informs the Drm Agent when there is no more data which need to be converted * or when an error occurs. Upon successful conversion of the complete data, * the agent will inform that where the header and body signature * should be added. This signature appending is needed to integrity * protect the converted file. * * @param[in] uniqueId Unique identifier for a session * @param[in] convertId Handle for the convert session * @return Return object contains the status of the data conversion, * the header and body signature data. It also informs * the application on which offset these signature data * should be appended. */ virtual DrmConvertedStatus* onCloseConvertSession(int uniqueId, int convertId) = 0; /** * Returns the information about the Drm Engine capabilities which includes * supported MimeTypes and file suffixes. * * @param[in] uniqueId Unique identifier for a session * @return DrmSupportInfo * instance which holds the capabilities of a plug-in */ virtual DrmSupportInfo* onGetSupportInfo(int uniqueId) = 0; /** * Open the decrypt session to decrypt the given protected content * * @param[in] uniqueId Unique identifier for a session * @param[in] decryptHandle Handle for the current decryption session * @param[in] fd File descriptor of the protected content to be decrypted * @param[in] offset Start position of the content * @param[in] length The length of the protected content * @return * DRM_ERROR_CANNOT_HANDLE for failure and DRM_NO_ERROR for success */ virtual status_t onOpenDecryptSession( int uniqueId, sp& decryptHandle, int fd, off64_t offset, off64_t length) = 0; /** * Open the decrypt session to decrypt the given protected content * * @param[in] uniqueId Unique identifier for a session * @param[in] decryptHandle Handle for the current decryption session * @param[in] fd File descriptor of the protected content to be decrypted * @param[in] offset Start position of the content * @param[in] length The length of the protected content * @param[in] mime Mime type of the protected content * drm plugin may do some optimization since the mime type is known. * @return * DRM_ERROR_CANNOT_HANDLE for failure and DRM_NO_ERROR for success */ virtual status_t onOpenDecryptSession( int /* uniqueId */, sp& /* decryptHandle */, int /* fd */, off64_t /* offset */, off64_t /* length */, const char* /* mime */) { return DRM_ERROR_CANNOT_HANDLE; } /** * Open the decrypt session to decrypt the given protected content * * @param[in] uniqueId Unique identifier for a session * @param[in] decryptHandle Handle for the current decryption session * @param[in] uri Path of the protected content to be decrypted * @return * DRM_ERROR_CANNOT_HANDLE for failure and DRM_NO_ERROR for success */ virtual status_t onOpenDecryptSession( int uniqueId, sp& decryptHandle, const char* uri) = 0; /** * Open the decrypt session to decrypt the given protected content * * @param[in] uniqueId Unique identifier for a session * @param[in] decryptHandle Handle for the current decryption session * @param[in] uri Path of the protected content to be decrypted * @param[in] mime Mime type of the protected content. The corresponding * drm plugin may do some optimization since the mime type is known. * @return * DRM_ERROR_CANNOT_HANDLE for failure and DRM_NO_ERROR for success */ virtual status_t onOpenDecryptSession( int /* uniqueId */, sp& /* decryptHandle */, const char* /* uri */, const char* /* mime */) { return DRM_ERROR_CANNOT_HANDLE; } /** * Open the decrypt session to decrypt the given protected content * * @param[in] uniqueId Unique identifier for a session * @param[in] decryptHandle Handle for the current decryption session * @param[in] buf Data to initiate decrypt session * @param[in] mimeType Mime type of the protected content * @return * DRM_ERROR_CANNOT_HANDLE for failure and DRM_NO_ERROR for success */ virtual status_t onOpenDecryptSession(int /* uniqueId */, sp& /* decryptHandle */, const DrmBuffer& /* buf */, const String8& /* mimeType */) { return DRM_ERROR_CANNOT_HANDLE; } /** * Close the decrypt session for the given handle * * @param[in] uniqueId Unique identifier for a session * @param[in] decryptHandle Handle for the decryption session * @return status_t * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure */ virtual status_t onCloseDecryptSession(int uniqueId, sp& decryptHandle) = 0; /** * Initialize decryption for the given unit of the protected content * * @param[in] uniqueId Unique identifier for a session * @param[in] decryptId Handle for the decryption session * @param[in] decryptUnitId ID Specifies decryption unit, such as track ID * @param[in] headerInfo Information for initializing decryption of this decrypUnit * @return status_t * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure */ virtual status_t onInitializeDecryptUnit(int uniqueId, sp& decryptHandle, int decryptUnitId, const DrmBuffer* headerInfo) = 0; /** * Decrypt the protected content buffers for the given unit * This method will be called any number of times, based on number of * encrypted streams received from application. * * @param[in] uniqueId Unique identifier for a session * @param[in] decryptId Handle for the decryption session * @param[in] decryptUnitId ID Specifies decryption unit, such as track ID * @param[in] encBuffer Encrypted data block * @param[out] decBuffer Decrypted data block * @param[in] IV Optional buffer * @return status_t * Returns the error code for this API * DRM_NO_ERROR for success, and one of DRM_ERROR_UNKNOWN, DRM_ERROR_LICENSE_EXPIRED * DRM_ERROR_SESSION_NOT_OPENED, DRM_ERROR_DECRYPT_UNIT_NOT_INITIALIZED, * DRM_ERROR_DECRYPT for failure. */ virtual status_t onDecrypt(int uniqueId, sp& decryptHandle, int decryptUnitId, const DrmBuffer* encBuffer, DrmBuffer** decBuffer, DrmBuffer* IV) = 0; /** * Finalize decryption for the given unit of the protected content * * @param[in] uniqueId Unique identifier for a session * @param[in] decryptHandle Handle for the decryption session * @param[in] decryptUnitId ID Specifies decryption unit, such as track ID * @return status_t * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure */ virtual status_t onFinalizeDecryptUnit( int uniqueId, sp& decryptHandle, int decryptUnitId) = 0; /** * Reads the specified number of bytes from an open DRM file. * * @param[in] uniqueId Unique identifier for a session * @param[in] decryptHandle Handle for the decryption session * @param[out] buffer Reference to the buffer that should receive the read data. * @param[in] numBytes Number of bytes to read. * @param[in] offset Offset with which to update the file position. * * @return Number of bytes read. Returns -1 for Failure. */ virtual ssize_t onPread(int uniqueId, sp& decryptHandle, void* buffer, ssize_t numBytes, off64_t offset) = 0; }; }; #endif /* __DRM_ENGINE_BASE_H__ */