FwdLockEngine.cpp revision ad6ec91c0bca37587e28bf72dfc38cde1b90544f 
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#include "SessionMap.h"
18#include "FwdLockEngine.h"
19#include <utils/Log.h>
20#include <errno.h>
21#include <stdio.h>
22#include <unistd.h>
23#include "drm_framework_common.h"
24#include <fcntl.h>
25#include <limits.h>
26#include <DrmRights.h>
27#include <DrmConstraints.h>
28#include <DrmMetadata.h>
29#include <DrmInfo.h>
30#include <DrmInfoStatus.h>
31#include <DrmInfoRequest.h>
32#include <DrmSupportInfo.h>
33#include <DrmConvertedStatus.h>
34#include <utils/String8.h>
35#include "FwdLockConv.h"
36#include "FwdLockFile.h"
37#include "FwdLockGlue.h"
38#include "MimeTypeUtil.h"
39
40#undef LOG_TAG
41#define LOG_TAG "FwdLockEngine"
42
43#ifdef DRM_OMA_FL_ENGINE_DEBUG
44#define LOG_NDEBUG 0
45#define LOG_VERBOSE(...) ALOGV(__VA_ARGS__)
46#else
47#define LOG_VERBOSE(...)
48#endif
49
50using namespace android;
51// This extern "C" is mandatory to be managed by TPlugInManager
52extern "C" IDrmEngine* create() {
53    return new FwdLockEngine();
54}
55
56// This extern "C" is mandatory to be managed by TPlugInManager
57extern "C" void destroy(IDrmEngine* plugIn) {
58    delete plugIn;
59}
60
61FwdLockEngine::FwdLockEngine() {
62    LOG_VERBOSE("FwdLockEngine Construction");
63}
64
65FwdLockEngine::~FwdLockEngine() {
66    LOG_VERBOSE("FwdLockEngine Destruction");
67
68    int size = decodeSessionMap.getSize();
69
70    for (int i = 0; i < size; i++) {
71        DecodeSession *session = (DecodeSession*) decodeSessionMap.getValueAt(i);
72        FwdLockFile_detach(session->fileDesc);
73        ::close(session->fileDesc);
74    }
75
76    size = convertSessionMap.getSize();
77    for (int i = 0; i < size; i++) {
78        ConvertSession *convSession = (ConvertSession*) convertSessionMap.getValueAt(i);
79        FwdLockConv_CloseSession(convSession->uniqueId, &(convSession->output));
80    }
81}
82
83int FwdLockEngine::getConvertedStatus(FwdLockConv_Status_t status) {
84    int retStatus = DrmConvertedStatus::STATUS_ERROR;
85
86    switch(status) {
87        case FwdLockConv_Status_OK:
88            retStatus = DrmConvertedStatus::STATUS_OK;
89            break;
90        case FwdLockConv_Status_SyntaxError:
91        case FwdLockConv_Status_InvalidArgument:
92        case FwdLockConv_Status_UnsupportedFileFormat:
93        case FwdLockConv_Status_UnsupportedContentTransferEncoding:
94            ALOGE("FwdLockEngine getConvertedStatus: file conversion Error %d. "
95                  "Returning STATUS_INPUTDATA_ERROR", status);
96            retStatus = DrmConvertedStatus::STATUS_INPUTDATA_ERROR;
97            break;
98        default:
99            ALOGE("FwdLockEngine getConvertedStatus: file conversion Error %d. "
100                  "Returning STATUS_ERROR", status);
101            retStatus = DrmConvertedStatus::STATUS_ERROR;
102            break;
103    }
104
105    return retStatus;
106}
107
108DrmConstraints* FwdLockEngine::onGetConstraints(int uniqueId, const String8* path, int action) {
109    DrmConstraints* drmConstraints = NULL;
110
111    LOG_VERBOSE("FwdLockEngine::onGetConstraints");
112
113    if (NULL != path &&
114        (RightsStatus::RIGHTS_VALID == onCheckRightsStatus(uniqueId, *path, action))) {
115        // Return the empty constraints to show no error condition.
116        drmConstraints = new DrmConstraints();
117    }
118
119    return drmConstraints;
120}
121
122DrmMetadata* FwdLockEngine::onGetMetadata(int uniqueId, const String8* path) {
123    DrmMetadata* drmMetadata = NULL;
124
125    LOG_VERBOSE("FwdLockEngine::onGetMetadata");
126
127    if (NULL != path) {
128        // Returns empty metadata to show no error condition.
129        drmMetadata = new DrmMetadata();
130    }
131
132    return drmMetadata;
133}
134
135android::status_t FwdLockEngine::onInitialize(int uniqueId) {
136    LOG_VERBOSE("FwdLockEngine::onInitialize");
137
138    if (FwdLockGlue_InitializeKeyEncryption()) {
139        LOG_VERBOSE("FwdLockEngine::onInitialize -- FwdLockGlue_InitializeKeyEncryption succeeded");
140    } else {
141        ALOGE("FwdLockEngine::onInitialize -- FwdLockGlue_InitializeKeyEncryption failed:"
142             "errno = %d", errno);
143    }
144
145    return DRM_NO_ERROR;
146}
147
148android::status_t
149FwdLockEngine::onSetOnInfoListener(int uniqueId, const IDrmEngine::OnInfoListener* infoListener) {
150    // Not used
151    LOG_VERBOSE("FwdLockEngine::onSetOnInfoListener");
152
153    return DRM_NO_ERROR;
154}
155
156android::status_t FwdLockEngine::onTerminate(int uniqueId) {
157    LOG_VERBOSE("FwdLockEngine::onTerminate");
158
159    return DRM_NO_ERROR;
160}
161
162// make sure that lower-case letters are used.
163const String8 FwdLockEngine::FileSuffixes[] = {
164    String8(".fl"),
165    String8(".dm"),
166};
167
168// make sure that lower-case letters are used.
169const String8 FwdLockEngine::MimeTypes[] = {
170    String8("application/x-android-drm-fl"),
171    String8("application/vnd.oma.drm.message"),
172};
173
174const String8 FwdLockEngine::Description("OMA V1 Forward Lock");
175
176void FwdLockEngine::AddSupportedMimeTypes(DrmSupportInfo *info) {
177    for (size_t i = 0, n = sizeof(MimeTypes)/sizeof(MimeTypes[0]); i < n; ++i) {
178        info->addMimeType(MimeTypes[i]);
179    }
180}
181
182void FwdLockEngine::AddSupportedFileSuffixes(DrmSupportInfo *info) {
183    for (size_t i = 0, n = sizeof(FileSuffixes)/sizeof(FileSuffixes[0]); i < n; ++i) {
184        info->addFileSuffix(FileSuffixes[i]);
185    }
186}
187
188bool FwdLockEngine::IsMimeTypeSupported(const String8& mime) {
189    String8 tmp(mime);
190    tmp.toLower();
191    for (size_t i = 0, n = sizeof(MimeTypes)/sizeof(MimeTypes[0]); i < n; ++i) {
192        if (tmp == MimeTypes[i]) {
193            return true;
194        }
195    }
196    return false;
197}
198
199bool FwdLockEngine::IsFileSuffixSupported(const String8& suffix) {
200    String8 tmp(suffix);
201    tmp.toLower();
202    for (size_t i = 0, n = sizeof(FileSuffixes)/sizeof(FileSuffixes[0]); i < n; ++i) {
203        if (tmp == FileSuffixes[i]) {
204            return true;
205        }
206    }
207    return false;
208}
209
210DrmSupportInfo* FwdLockEngine::onGetSupportInfo(int uniqueId) {
211    DrmSupportInfo* pSupportInfo = new DrmSupportInfo();
212
213    LOG_VERBOSE("FwdLockEngine::onGetSupportInfo");
214
215    // fill all Forward Lock mimetypes and extensions
216    if (NULL != pSupportInfo) {
217        AddSupportedMimeTypes(pSupportInfo);
218        AddSupportedFileSuffixes(pSupportInfo);
219        pSupportInfo->setDescription(Description);
220    }
221
222    return pSupportInfo;
223}
224
225bool FwdLockEngine::onCanHandle(int uniqueId, const String8& path) {
226    bool result = false;
227
228    String8 extString = path.getPathExtension();
229    return IsFileSuffixSupported(extString);
230}
231
232DrmInfoStatus* FwdLockEngine::onProcessDrmInfo(int uniqueId, const DrmInfo* drmInfo) {
233    DrmInfoStatus *drmInfoStatus = NULL;
234
235    // Nothing to process
236
237    drmInfoStatus = new DrmInfoStatus((int)DrmInfoStatus::STATUS_OK, 0, NULL, String8(""));
238
239    LOG_VERBOSE("FwdLockEngine::onProcessDrmInfo");
240
241    return drmInfoStatus;
242}
243
244status_t FwdLockEngine::onSaveRights(
245            int uniqueId,
246            const DrmRights& drmRights,
247            const String8& rightsPath,
248            const String8& contentPath) {
249    // No rights to save. Return
250    LOG_VERBOSE("FwdLockEngine::onSaveRights");
251    return DRM_ERROR_UNKNOWN;
252}
253
254DrmInfo* FwdLockEngine::onAcquireDrmInfo(int uniqueId, const DrmInfoRequest* drmInfoRequest) {
255    DrmInfo* drmInfo = NULL;
256
257    // Nothing to be done for Forward Lock file
258    LOG_VERBOSE("FwdLockEngine::onAcquireDrmInfo");
259
260    return drmInfo;
261}
262
263int FwdLockEngine::onCheckRightsStatus(int uniqueId,
264                                       const String8& path,
265                                       int action) {
266    int result = RightsStatus::RIGHTS_INVALID;
267
268    LOG_VERBOSE("FwdLockEngine::onCheckRightsStatus");
269
270    // Only Transfer action is not allowed for forward Lock files.
271    if (onCanHandle(uniqueId, path)) {
272        switch(action) {
273            case Action::DEFAULT:
274            case Action::PLAY:
275            case Action::RINGTONE:
276            case Action::OUTPUT:
277            case Action::PREVIEW:
278            case Action::EXECUTE:
279            case Action::DISPLAY:
280                result = RightsStatus::RIGHTS_VALID;
281                break;
282
283            case Action::TRANSFER:
284            default:
285                result = RightsStatus::RIGHTS_INVALID;
286                break;
287        }
288    }
289
290    return result;
291}
292
293status_t FwdLockEngine::onConsumeRights(int uniqueId,
294                                        DecryptHandle* decryptHandle,
295                                        int action,
296                                        bool reserve) {
297    // No rights consumption
298    LOG_VERBOSE("FwdLockEngine::onConsumeRights");
299    return DRM_NO_ERROR;
300}
301
302bool FwdLockEngine::onValidateAction(int uniqueId,
303                                     const String8& path,
304                                     int action,
305                                     const ActionDescription& description) {
306    LOG_VERBOSE("FwdLockEngine::onValidateAction");
307
308    // For the forwardlock engine checkRights and ValidateAction are the same.
309    return (onCheckRightsStatus(uniqueId, path, action) == RightsStatus::RIGHTS_VALID);
310}
311
312String8 FwdLockEngine::onGetOriginalMimeType(int uniqueId, const String8& path) {
313    LOG_VERBOSE("FwdLockEngine::onGetOriginalMimeType");
314    String8 mimeString = String8("");
315    int fileDesc = FwdLockFile_open(path.string());
316
317    if (-1 < fileDesc) {
318        const char* pMimeType = FwdLockFile_GetContentType(fileDesc);
319
320        if (NULL != pMimeType) {
321            String8 contentType = String8(pMimeType);
322            contentType.toLower();
323            mimeString = MimeTypeUtil::convertMimeType(contentType);
324        }
325
326        FwdLockFile_close(fileDesc);
327    }
328
329    return mimeString;
330}
331
332int FwdLockEngine::onGetDrmObjectType(int uniqueId,
333                                      const String8& path,
334                                      const String8& mimeType) {
335    String8 mimeStr = String8(mimeType);
336
337    LOG_VERBOSE("FwdLockEngine::onGetDrmObjectType");
338
339    /* Checks whether
340    * 1. path and mime type both are not empty strings (meaning unavailable) else content is unknown
341    * 2. if one of them is empty string and if other is known then its a DRM Content Object.
342    * 3. if both of them are available, then both may be of known type
343    *    (regardless of the relation between them to make it compatible with other DRM Engines)
344    */
345    if (((0 == path.length()) || onCanHandle(uniqueId, path)) &&
346        ((0 == mimeType.length()) || IsMimeTypeSupported(mimeType)) && (mimeType != path) ) {
347            return DrmObjectType::CONTENT;
348    }
349
350    return DrmObjectType::UNKNOWN;
351}
352
353status_t FwdLockEngine::onRemoveRights(int uniqueId, const String8& path) {
354    // No Rights to remove
355    LOG_VERBOSE("FwdLockEngine::onRemoveRights");
356    return DRM_NO_ERROR;
357}
358
359status_t FwdLockEngine::onRemoveAllRights(int uniqueId) {
360    // No rights to remove
361    LOG_VERBOSE("FwdLockEngine::onRemoveAllRights");
362    return DRM_NO_ERROR;
363}
364
365#ifdef USE_64BIT_DRM_API
366status_t FwdLockEngine::onSetPlaybackStatus(int uniqueId, DecryptHandle* decryptHandle,
367                                            int playbackStatus, int64_t position) {
368#else
369status_t FwdLockEngine::onSetPlaybackStatus(int uniqueId, DecryptHandle* decryptHandle,
370                                            int playbackStatus, int position) {
371#endif
372    // Not used
373    LOG_VERBOSE("FwdLockEngine::onSetPlaybackStatus");
374    return DRM_NO_ERROR;
375}
376
377status_t FwdLockEngine::onOpenConvertSession(int uniqueId,
378                                         int convertId) {
379    status_t result = DRM_ERROR_UNKNOWN;
380    LOG_VERBOSE("FwdLockEngine::onOpenConvertSession");
381    if (!convertSessionMap.isCreated(convertId)) {
382        ConvertSession *newSession = new ConvertSession();
383        if (FwdLockConv_Status_OK ==
384            FwdLockConv_OpenSession(&(newSession->uniqueId), &(newSession->output))) {
385            convertSessionMap.addValue(convertId, newSession);
386            result = DRM_NO_ERROR;
387        } else {
388            ALOGE("FwdLockEngine::onOpenConvertSession -- FwdLockConv_OpenSession failed.");
389            delete newSession;
390        }
391    }
392    return result;
393}
394
395DrmConvertedStatus* FwdLockEngine::onConvertData(int uniqueId,
396                                                 int convertId,
397                                                 const DrmBuffer* inputData) {
398    FwdLockConv_Status_t retStatus = FwdLockConv_Status_InvalidArgument;
399    DrmBuffer *convResult = new DrmBuffer(NULL, 0);
400    int offset = -1;
401
402    if (NULL != inputData && convertSessionMap.isCreated(convertId)) {
403        ConvertSession *convSession = convertSessionMap.getValue(convertId);
404
405        if (NULL != convSession) {
406            retStatus = FwdLockConv_ConvertData(convSession->uniqueId,
407                                                inputData->data,
408                                                inputData->length,
409                                                &(convSession->output));
410
411            if (FwdLockConv_Status_OK == retStatus) {
412                // return bytes from conversion if available
413                if (convSession->output.fromConvertData.numBytes > 0) {
414                    convResult->data = new char[convSession->output.fromConvertData.numBytes];
415
416                    if (NULL != convResult->data) {
417                        convResult->length = convSession->output.fromConvertData.numBytes;
418                        memcpy(convResult->data,
419                               (char *)convSession->output.fromConvertData.pBuffer,
420                               convResult->length);
421                    }
422                }
423            } else {
424                offset = convSession->output.fromConvertData.errorPos;
425            }
426        }
427    }
428    return new DrmConvertedStatus(getConvertedStatus(retStatus), convResult, offset);
429}
430
431DrmConvertedStatus* FwdLockEngine::onCloseConvertSession(int uniqueId,
432                                                         int convertId) {
433    FwdLockConv_Status_t retStatus = FwdLockConv_Status_InvalidArgument;
434    DrmBuffer *convResult = new DrmBuffer(NULL, 0);
435    int offset = -1;
436
437    LOG_VERBOSE("FwdLockEngine::onCloseConvertSession");
438
439    if (convertSessionMap.isCreated(convertId)) {
440        ConvertSession *convSession = convertSessionMap.getValue(convertId);
441
442        if (NULL != convSession) {
443            retStatus = FwdLockConv_CloseSession(convSession->uniqueId, &(convSession->output));
444
445            if (FwdLockConv_Status_OK == retStatus) {
446                offset = convSession->output.fromCloseSession.fileOffset;
447                convResult->data = new char[FWD_LOCK_SIGNATURES_SIZE];
448
449                if (NULL != convResult->data) {
450                      convResult->length = FWD_LOCK_SIGNATURES_SIZE;
451                      memcpy(convResult->data,
452                             (char *)convSession->output.fromCloseSession.signatures,
453                             convResult->length);
454                }
455            }
456        }
457        convertSessionMap.removeValue(convertId);
458    }
459    return new DrmConvertedStatus(getConvertedStatus(retStatus), convResult, offset);
460}
461
462#ifdef USE_64BIT_DRM_API
463status_t FwdLockEngine::onOpenDecryptSession(int uniqueId,
464                                             DecryptHandle* decryptHandle,
465                                             int fd,
466                                             off64_t offset,
467                                             off64_t length) {
468#else
469status_t FwdLockEngine::onOpenDecryptSession(int uniqueId,
470                                             DecryptHandle* decryptHandle,
471                                             int fd,
472                                             int offset,
473                                             int length) {
474#endif
475    status_t result = DRM_ERROR_CANNOT_HANDLE;
476    int fileDesc = -1;
477
478    LOG_VERBOSE("FwdLockEngine::onOpenDecryptSession");
479
480    if ((-1 < fd) &&
481        (NULL != decryptHandle) &&
482        (!decodeSessionMap.isCreated(decryptHandle->decryptId))) {
483        fileDesc = dup(fd);
484    } else {
485        ALOGE("FwdLockEngine::onOpenDecryptSession parameter error");
486        return result;
487    }
488
489    if (-1 < fileDesc &&
490        -1 < ::lseek(fileDesc, offset, SEEK_SET) &&
491        -1 < FwdLockFile_attach(fileDesc)) {
492        // check for file integrity. This must be done to protect the content mangling.
493        int retVal = FwdLockFile_CheckHeaderIntegrity(fileDesc);
494        DecodeSession* decodeSession = new DecodeSession(fileDesc);
495
496        if (retVal && NULL != decodeSession) {
497            decodeSessionMap.addValue(decryptHandle->decryptId, decodeSession);
498            const char *pmime= FwdLockFile_GetContentType(fileDesc);
499            String8 contentType = String8(pmime == NULL ? "" : pmime);
500            contentType.toLower();
501            decryptHandle->mimeType = MimeTypeUtil::convertMimeType(contentType);
502            decryptHandle->decryptApiType = DecryptApiType::CONTAINER_BASED;
503            decryptHandle->status = RightsStatus::RIGHTS_VALID;
504            decryptHandle->decryptInfo = NULL;
505            result = DRM_NO_ERROR;
506        } else {
507            LOG_VERBOSE("FwdLockEngine::onOpenDecryptSession Integrity Check failed for the fd");
508            FwdLockFile_detach(fileDesc);
509            delete decodeSession;
510        }
511    }
512
513    if (DRM_NO_ERROR != result && -1 < fileDesc) {
514        ::close(fileDesc);
515    }
516
517    LOG_VERBOSE("FwdLockEngine::onOpenDecryptSession Exit. result = %d", result);
518
519    return result;
520}
521
522status_t FwdLockEngine::onOpenDecryptSession(int uniqueId,
523                                             DecryptHandle* decryptHandle,
524                                             const char* uri) {
525    status_t result = DRM_ERROR_CANNOT_HANDLE;
526    const char fileTag [] = "file://";
527
528    if (NULL != decryptHandle && NULL != uri && strlen(uri) > sizeof(fileTag)) {
529        String8 uriTag = String8(uri);
530        uriTag.toLower();
531
532        if (0 == strncmp(uriTag.string(), fileTag, sizeof(fileTag) - 1)) {
533            const char *filePath = strchr(uri + sizeof(fileTag) - 1, '/');
534            if (NULL != filePath && onCanHandle(uniqueId, String8(filePath))) {
535                int fd = open(filePath, O_RDONLY);
536
537                if (-1 < fd) {
538                    // offset is always 0 and length is not used. so any positive size.
539                    result = onOpenDecryptSession(uniqueId, decryptHandle, fd, 0, 1);
540
541                    // fd is duplicated already if success. closing the file
542                    close(fd);
543                }
544            }
545        }
546    }
547
548    return result;
549}
550
551status_t FwdLockEngine::onCloseDecryptSession(int uniqueId,
552                                              DecryptHandle* decryptHandle) {
553    status_t result = DRM_ERROR_UNKNOWN;
554    LOG_VERBOSE("FwdLockEngine::onCloseDecryptSession");
555
556    if (NULL != decryptHandle && decodeSessionMap.isCreated(decryptHandle->decryptId)) {
557        DecodeSession* session = decodeSessionMap.getValue(decryptHandle->decryptId);
558        if (NULL != session && session->fileDesc > -1) {
559            FwdLockFile_detach(session->fileDesc);
560            ::close(session->fileDesc);
561            decodeSessionMap.removeValue(decryptHandle->decryptId);
562            result = DRM_NO_ERROR;
563        }
564    }
565
566    if (NULL != decryptHandle) {
567        if (NULL != decryptHandle->decryptInfo) {
568            delete decryptHandle->decryptInfo;
569            decryptHandle->decryptInfo = NULL;
570        }
571
572        decryptHandle->copyControlVector.clear();
573        decryptHandle->extendedData.clear();
574
575        delete decryptHandle;
576        decryptHandle = NULL;
577    }
578
579    LOG_VERBOSE("FwdLockEngine::onCloseDecryptSession Exit");
580    return result;
581}
582
583status_t FwdLockEngine::onInitializeDecryptUnit(int uniqueId,
584                                                DecryptHandle* decryptHandle,
585                                                int decryptUnitId,
586                                                const DrmBuffer* headerInfo) {
587    ALOGE("FwdLockEngine::onInitializeDecryptUnit is not supported for this DRM scheme");
588    return DRM_ERROR_UNKNOWN;
589}
590
591status_t FwdLockEngine::onDecrypt(int uniqueId, DecryptHandle* decryptHandle, int decryptUnitId,
592            const DrmBuffer* encBuffer, DrmBuffer** decBuffer, DrmBuffer* IV) {
593    ALOGE("FwdLockEngine::onDecrypt is not supported for this DRM scheme");
594    return DRM_ERROR_UNKNOWN;
595}
596
597status_t FwdLockEngine::onDecrypt(int uniqueId,
598                                  DecryptHandle* decryptHandle,
599                                  int decryptUnitId,
600                                  const DrmBuffer* encBuffer,
601                                  DrmBuffer** decBuffer) {
602    ALOGE("FwdLockEngine::onDecrypt is not supported for this DRM scheme");
603    return DRM_ERROR_UNKNOWN;
604}
605
606status_t FwdLockEngine::onFinalizeDecryptUnit(int uniqueId,
607                                              DecryptHandle* decryptHandle,
608                                              int decryptUnitId) {
609    ALOGE("FwdLockEngine::onFinalizeDecryptUnit is not supported for this DRM scheme");
610    return DRM_ERROR_UNKNOWN;
611}
612
613ssize_t FwdLockEngine::onRead(int uniqueId,
614                              DecryptHandle* decryptHandle,
615                              void* buffer,
616                              int numBytes) {
617    ssize_t size = -1;
618
619    if (NULL != decryptHandle &&
620       decodeSessionMap.isCreated(decryptHandle->decryptId) &&
621        NULL != buffer &&
622        numBytes > -1) {
623        DecodeSession* session = decodeSessionMap.getValue(decryptHandle->decryptId);
624        if (NULL != session && session->fileDesc > -1) {
625            size = FwdLockFile_read(session->fileDesc, buffer, numBytes);
626
627            if (0 > size) {
628                session->offset = ((off_t)-1);
629            } else {
630                session->offset += size;
631            }
632        }
633    }
634
635    return size;
636}
637
638#ifdef USE_64BIT_DRM_API
639off64_t FwdLockEngine::onLseek(int uniqueId, DecryptHandle* decryptHandle,
640                               off64_t offset, int whence) {
641#else
642off_t FwdLockEngine::onLseek(int uniqueId, DecryptHandle* decryptHandle,
643                             off_t offset, int whence) {
644#endif
645    off_t offval = -1;
646
647    if (NULL != decryptHandle && decodeSessionMap.isCreated(decryptHandle->decryptId)) {
648        DecodeSession* session = decodeSessionMap.getValue(decryptHandle->decryptId);
649        if (NULL != session && session->fileDesc > -1) {
650            offval = FwdLockFile_lseek(session->fileDesc, offset, whence);
651            session->offset = offval;
652        }
653    }
654
655    return offval;
656}
657
658#ifdef USE_64BIT_DRM_API
659ssize_t FwdLockEngine::onPread(int uniqueId,
660                               DecryptHandle* decryptHandle,
661                               void* buffer,
662                               ssize_t numBytes,
663                               off64_t offset) {
664#else
665ssize_t FwdLockEngine::onPread(int uniqueId,
666                               DecryptHandle* decryptHandle,
667                               void* buffer,
668                               ssize_t numBytes,
669                               off_t offset) {
670#endif
671    ssize_t bytesRead = -1;
672
673    DecodeSession* decoderSession = NULL;
674
675    if ((NULL != decryptHandle) &&
676        (NULL != (decoderSession = decodeSessionMap.getValue(decryptHandle->decryptId))) &&
677        (NULL != buffer) &&
678        (numBytes > -1) &&
679        (offset > -1)) {
680        if (offset != decoderSession->offset) {
681            decoderSession->offset = onLseek(uniqueId, decryptHandle, offset, SEEK_SET);
682        }
683
684        if (((off_t)-1) != decoderSession->offset) {
685            bytesRead = onRead(uniqueId, decryptHandle, buffer, numBytes);
686            if (bytesRead < 0) {
687                ALOGE("FwdLockEngine::onPread error reading");
688            }
689        }
690    } else {
691        ALOGE("FwdLockEngine::onPread decryptId not found");
692    }
693
694    return bytesRead;
695}
696