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_CLIENT_H__ 18 #define __DRM_MANAGER_CLIENT_H__ 19 20 #include <utils/threads.h> 21 #include <binder/IInterface.h> 22 #include "drm_framework_common.h" 23 24 namespace android { 25 26 class DrmInfo; 27 class DrmRights; 28 class DrmMetadata; 29 class DrmInfoEvent; 30 class DrmInfoStatus; 31 class DrmInfoRequest; 32 class DrmSupportInfo; 33 class DrmConstraints; 34 class DrmConvertedStatus; 35 class DrmManagerClientImpl; 36 37 /** 38 * The Native application will instantiate this class and access DRM Framework 39 * services through this class. 40 * 41 */ 42 class DrmManagerClient { 43 public: 44 DrmManagerClient(); 45 46 virtual ~DrmManagerClient(); 47 48 public: 49 class OnInfoListener: virtual public RefBase { 50 51 public: 52 virtual ~OnInfoListener() {} 53 54 public: 55 virtual void onInfo(const DrmInfoEvent& event) = 0; 56 }; 57 58 /** 59 * APIs which will be used by native modules (e.g. StageFright) 60 * 61 */ 62 public: 63 /** 64 * Open the decrypt session to decrypt the given protected content 65 * 66 * @param[in] fd File descriptor of the protected content to be decrypted 67 * @param[in] offset Start position of the content 68 * @param[in] length The length of the protected content 69 * @param[in] mime Mime type of the protected content if it is not NULL or empty 70 * @return 71 * Handle for the decryption session 72 */ 73 sp<DecryptHandle> openDecryptSession(int fd, off64_t offset, off64_t length, const char* mime); 74 75 /** 76 * Open the decrypt session to decrypt the given protected content 77 * 78 * @param[in] uri Path of the protected content to be decrypted 79 * @param[in] mime Mime type of the protected content if it is not NULL or empty 80 * @return 81 * Handle for the decryption session 82 */ 83 sp<DecryptHandle> openDecryptSession(const char* uri, const char* mime); 84 85 /** 86 * Close the decrypt session for the given handle 87 * 88 * @param[in] decryptHandle Handle for the decryption session 89 * @return status_t 90 * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure 91 */ 92 status_t closeDecryptSession(sp<DecryptHandle> &decryptHandle); 93 94 /** 95 * Consumes the rights for a content. 96 * If the reserve parameter is true the rights is reserved until the same 97 * application calls this api again with the reserve parameter set to false. 98 * 99 * @param[in] decryptHandle Handle for the decryption session 100 * @param[in] action Action to perform. (Action::DEFAULT, Action::PLAY, etc) 101 * @param[in] reserve True if the rights should be reserved. 102 * @return status_t 103 * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure. 104 * In case license has been expired, DRM_ERROR_LICENSE_EXPIRED will be returned. 105 */ 106 status_t consumeRights(sp<DecryptHandle> &decryptHandle, int action, bool reserve); 107 108 /** 109 * Informs the DRM engine about the playback actions performed on the DRM files. 110 * 111 * @param[in] decryptHandle Handle for the decryption session 112 * @param[in] playbackStatus Playback action (Playback::START, Playback::STOP, Playback::PAUSE) 113 * @param[in] position Position in the file (in milliseconds) where the start occurs. 114 * Only valid together with Playback::START. 115 * @return status_t 116 * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure 117 */ 118 status_t setPlaybackStatus( 119 sp<DecryptHandle> &decryptHandle, int playbackStatus, int64_t position); 120 121 /** 122 * Initialize decryption for the given unit of the protected content 123 * 124 * @param[in] decryptHandle Handle for the decryption session 125 * @param[in] decryptUnitId ID which specifies decryption unit, such as track ID 126 * @param[in] headerInfo Information for initializing decryption of this decrypUnit 127 * @return status_t 128 * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure 129 */ 130 status_t initializeDecryptUnit( 131 sp<DecryptHandle> &decryptHandle, int decryptUnitId, const DrmBuffer* headerInfo); 132 133 /** 134 * Decrypt the protected content buffers for the given unit 135 * This method will be called any number of times, based on number of 136 * encrypted streams received from application. 137 * 138 * @param[in] decryptHandle Handle for the decryption session 139 * @param[in] decryptUnitId ID which specifies decryption unit, such as track ID 140 * @param[in] encBuffer Encrypted data block 141 * @param[out] decBuffer Decrypted data block 142 * @param[in] IV Optional buffer 143 * @return status_t 144 * Returns the error code for this API 145 * DRM_NO_ERROR for success, and one of DRM_ERROR_UNKNOWN, DRM_ERROR_LICENSE_EXPIRED 146 * DRM_ERROR_SESSION_NOT_OPENED, DRM_ERROR_DECRYPT_UNIT_NOT_INITIALIZED, 147 * DRM_ERROR_DECRYPT for failure. 148 */ 149 status_t decrypt( 150 sp<DecryptHandle> &decryptHandle, int decryptUnitId, 151 const DrmBuffer* encBuffer, DrmBuffer** decBuffer, DrmBuffer* IV = NULL); 152 153 /** 154 * Finalize decryption for the given unit of the protected content 155 * 156 * @param[in] decryptHandle Handle for the decryption session 157 * @param[in] decryptUnitId ID which specifies decryption unit, such as track ID 158 * @return status_t 159 * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure 160 */ 161 status_t finalizeDecryptUnit( 162 sp<DecryptHandle> &decryptHandle, int decryptUnitId); 163 164 /** 165 * Reads the specified number of bytes from an open DRM file. 166 * 167 * @param[in] decryptHandle Handle for the decryption session 168 * @param[out] buffer Reference to the buffer that should receive the read data. 169 * @param[in] numBytes Number of bytes to read. 170 * @param[in] offset Offset with which to update the file position. 171 * 172 * @return Number of bytes read. Returns -1 for Failure. 173 */ 174 ssize_t pread(sp<DecryptHandle> &decryptHandle, 175 void* buffer, ssize_t numBytes, off64_t offset); 176 177 /** 178 * Validates whether an action on the DRM content is allowed or not. 179 * 180 * @param[in] path Path of the protected content 181 * @param[in] action Action to validate. (Action::DEFAULT, Action::PLAY, etc) 182 * @param[in] description Detailed description of the action 183 * @return true if the action is allowed. 184 */ 185 bool validateAction(const String8& path, int action, const ActionDescription& description); 186 187 /** 188 * APIs which are just the underlying implementation for the Java API 189 * 190 */ 191 public: 192 /** 193 * Register a callback to be invoked when the caller required to 194 * receive necessary information 195 * 196 * @param[in] infoListener Listener 197 * @return status_t 198 * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure 199 */ 200 status_t setOnInfoListener(const sp<DrmManagerClient::OnInfoListener>& infoListener); 201 202 /** 203 * Get constraint information associated with input content 204 * 205 * @param[in] path Path of the protected content 206 * @param[in] action Actions defined such as, 207 * Action::DEFAULT, Action::PLAY, etc 208 * @return DrmConstraints 209 * key-value pairs of constraint are embedded in it 210 * @note 211 * In case of error, return NULL 212 */ 213 DrmConstraints* getConstraints(const String8* path, const int action); 214 215 /** 216 * Get metadata information associated with input content 217 * 218 * @param[in] path Path of the protected content 219 * @return DrmMetadata 220 * key-value pairs of metadata 221 * @note 222 * In case of error, return NULL 223 */ 224 DrmMetadata* getMetadata(const String8* path); 225 226 /** 227 * Check whether the given mimetype or path can be handled 228 * 229 * @param[in] path Path of the content needs to be handled 230 * @param[in] mimetype Mimetype of the content needs to be handled 231 * @return 232 * True if DrmManager can handle given path or mime type. 233 */ 234 bool canHandle(const String8& path, const String8& mimeType); 235 236 /** 237 * Executes given drm information based on its type 238 * 239 * @param[in] drmInfo Information needs to be processed 240 * @return DrmInfoStatus 241 * instance as a result of processing given input 242 */ 243 DrmInfoStatus* processDrmInfo(const DrmInfo* drmInfo); 244 245 /** 246 * Retrieves necessary information for registration, unregistration or rights 247 * acquisition information. 248 * 249 * @param[in] drmInfoRequest Request information to retrieve drmInfo 250 * @return DrmInfo 251 * instance as a result of processing given input 252 */ 253 DrmInfo* acquireDrmInfo(const DrmInfoRequest* drmInfoRequest); 254 255 /** 256 * Save DRM rights to specified rights path 257 * and make association with content path 258 * 259 * @param[in] drmRights DrmRights to be saved 260 * @param[in] rightsPath File path where rights to be saved 261 * @param[in] contentPath File path where content was saved 262 * @return status_t 263 * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure 264 */ 265 status_t saveRights( 266 const DrmRights& drmRights, const String8& rightsPath, const String8& contentPath); 267 268 /** 269 * Retrieves the mime type embedded inside the original content 270 * 271 * @param[in] path the path of the protected content 272 * @return String8 273 * Returns mime-type of the original content, such as "video/mpeg" 274 */ 275 String8 getOriginalMimeType(const String8& path); 276 277 /** 278 * Retrieves the type of the protected object (content, rights, etc..) 279 * by using specified path or mimetype. At least one parameter should be non null 280 * to retrieve DRM object type 281 * 282 * @param[in] path Path of the content or null. 283 * @param[in] mimeType Mime type of the content or null. 284 * @return type of the DRM content, 285 * such as DrmObjectType::CONTENT, DrmObjectType::RIGHTS_OBJECT 286 */ 287 int getDrmObjectType(const String8& path, const String8& mimeType); 288 289 /** 290 * Check whether the given content has valid rights or not 291 * 292 * @param[in] path Path of the protected content 293 * @param[in] action Action to perform 294 * @return the status of the rights for the protected content, 295 * such as RightsStatus::RIGHTS_VALID, RightsStatus::RIGHTS_EXPIRED, etc. 296 */ 297 int checkRightsStatus(const String8& path, int action); 298 299 /** 300 * Removes the rights associated with the given protected content 301 * 302 * @param[in] path Path of the protected content 303 * @return status_t 304 * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure 305 */ 306 status_t removeRights(const String8& path); 307 308 /** 309 * Removes all the rights information of each plug-in associated with 310 * DRM framework. Will be used in master reset 311 * 312 * @return status_t 313 * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure 314 */ 315 status_t removeAllRights(); 316 317 /** 318 * This API is for Forward Lock DRM. 319 * Each time the application tries to download a new DRM file 320 * which needs to be converted, then the application has to 321 * begin with calling this API. 322 * 323 * @param[in] convertId Handle for the convert session 324 * @param[in] mimeType Description/MIME type of the input data packet 325 * @return Return handle for the convert session 326 */ 327 int openConvertSession(const String8& mimeType); 328 329 /** 330 * Passes the input data which need to be converted. The resultant 331 * converted data and the status is returned in the DrmConvertedInfo 332 * object. This method will be called each time there are new block 333 * of data received by the application. 334 * 335 * @param[in] convertId Handle for the convert session 336 * @param[in] inputData Input Data which need to be converted 337 * @return Return object contains the status of the data conversion, 338 * the output converted data and offset. In this case the 339 * application will ignore the offset information. 340 */ 341 DrmConvertedStatus* convertData(int convertId, const DrmBuffer* inputData); 342 343 /** 344 * When there is no more data which need to be converted or when an 345 * error occurs that time the application has to inform the Drm agent 346 * via this API. Upon successful conversion of the complete data, 347 * the agent will inform that where the header and body signature 348 * should be added. This signature appending is needed to integrity 349 * protect the converted file. 350 * 351 * @param[in] convertId Handle for the convert session 352 * @return Return object contains the status of the data conversion, 353 * the header and body signature data. It also informs 354 * the application on which offset these signature data 355 * should be appended. 356 */ 357 DrmConvertedStatus* closeConvertSession(int convertId); 358 359 /** 360 * Retrieves all DrmSupportInfo instance that native DRM framework can handle. 361 * This interface is meant to be used by JNI layer 362 * 363 * @param[out] length Number of elements in drmSupportInfoArray 364 * @param[out] drmSupportInfoArray Array contains all DrmSupportInfo 365 * that native DRM framework can handle 366 * @return status_t 367 * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure 368 */ 369 status_t getAllSupportInfo(int* length, DrmSupportInfo** drmSupportInfoArray); 370 371 private: 372 int mUniqueId; 373 sp<DrmManagerClientImpl> mDrmManagerClientImpl; 374 }; 375 376 }; 377 378 #endif /* __DRM_MANAGER_CLIENT_H__ */ 379 380
