summaryrefslogtreecommitdiffstats
path: root/dom/media/gmp/widevine-adapter/WidevineDecryptor.cpp
blob: 149fa1701f5d0b0af896816bea30e2798465ca84 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "WidevineDecryptor.h"

#include "WidevineAdapter.h"
#include "WidevineUtils.h"
#include "WidevineFileIO.h"
#include <mozilla/SizePrintfMacros.h>
#include <stdarg.h>
#include "base/time.h"

using namespace cdm;
using namespace std;

namespace mozilla {

static map<uint32_t, RefPtr<CDMWrapper>> sDecryptors;

/* static */
RefPtr<CDMWrapper>
WidevineDecryptor::GetInstance(uint32_t aInstanceId)
{
  auto itr = sDecryptors.find(aInstanceId);
  if (itr != sDecryptors.end()) {
    return itr->second;
  }
  return nullptr;
}


WidevineDecryptor::WidevineDecryptor()
  : mCallback(nullptr)
{
  Log("WidevineDecryptor created this=%p", this);
  AddRef(); // Released in DecryptingComplete().
}

WidevineDecryptor::~WidevineDecryptor()
{
  Log("WidevineDecryptor destroyed this=%p", this);
}

void
WidevineDecryptor::SetCDM(RefPtr<CDMWrapper> aCDM, uint32_t aInstanceId)
{
  mCDM = aCDM;
  mInstanceId = aInstanceId;
  sDecryptors[mInstanceId] = aCDM;
}

void
WidevineDecryptor::Init(GMPDecryptorCallback* aCallback,
                        bool aDistinctiveIdentifierRequired,
                        bool aPersistentStateRequired)
{
  Log("WidevineDecryptor::Init() this=%p distinctiveId=%d persistentState=%d",
      this, aDistinctiveIdentifierRequired, aPersistentStateRequired);
  MOZ_ASSERT(aCallback);
  mCallback = aCallback;
  MOZ_ASSERT(mCDM);
  mDistinctiveIdentifierRequired = aDistinctiveIdentifierRequired;
  mPersistentStateRequired = aPersistentStateRequired;
  if (CDM()) {
    CDM()->Initialize(aDistinctiveIdentifierRequired,
                      aPersistentStateRequired);
  }
}

static SessionType
ToCDMSessionType(GMPSessionType aSessionType)
{
  switch (aSessionType) {
    case kGMPTemporySession: return kTemporary;
    case kGMPPersistentSession: return kPersistentLicense;
    case kGMPSessionInvalid: return kTemporary;
    // TODO: kPersistentKeyRelease
  }
  MOZ_ASSERT(false); // Not supposed to get here.
  return kTemporary;
}

void
WidevineDecryptor::CreateSession(uint32_t aCreateSessionToken,
                                 uint32_t aPromiseId,
                                 const char* aInitDataType,
                                 uint32_t aInitDataTypeSize,
                                 const uint8_t* aInitData,
                                 uint32_t aInitDataSize,
                                 GMPSessionType aSessionType)
{
  Log("Decryptor::CreateSession(token=%d, pid=%d)", aCreateSessionToken, aPromiseId);
  InitDataType initDataType;
  if (!strcmp(aInitDataType, "cenc")) {
    initDataType = kCenc;
  } else if (!strcmp(aInitDataType, "webm")) {
    initDataType = kWebM;
  } else if (!strcmp(aInitDataType, "keyids")) {
    initDataType = kKeyIds;
  } else {
    // Invalid init data type
    const char* errorMsg = "Invalid init data type when creating session.";
    OnRejectPromise(aPromiseId, kNotSupportedError, 0, errorMsg, sizeof(errorMsg));
    return;
  }
  mPromiseIdToNewSessionTokens[aPromiseId] = aCreateSessionToken;
  CDM()->CreateSessionAndGenerateRequest(aPromiseId,
                                         ToCDMSessionType(aSessionType),
                                         initDataType,
                                         aInitData, aInitDataSize);
}

void
WidevineDecryptor::LoadSession(uint32_t aPromiseId,
                               const char* aSessionId,
                               uint32_t aSessionIdLength)
{
  Log("Decryptor::LoadSession(pid=%d, %s)", aPromiseId, aSessionId);
  // TODO: session type??
  CDM()->LoadSession(aPromiseId, kPersistentLicense, aSessionId, aSessionIdLength);
}

void
WidevineDecryptor::UpdateSession(uint32_t aPromiseId,
                                 const char* aSessionId,
                                 uint32_t aSessionIdLength,
                                 const uint8_t* aResponse,
                                 uint32_t aResponseSize)
{
  Log("Decryptor::UpdateSession(pid=%d, session=%s)", aPromiseId, aSessionId);
  CDM()->UpdateSession(aPromiseId, aSessionId, aSessionIdLength, aResponse, aResponseSize);
}

void
WidevineDecryptor::CloseSession(uint32_t aPromiseId,
                                const char* aSessionId,
                                uint32_t aSessionIdLength)
{
  Log("Decryptor::CloseSession(pid=%d, session=%s)", aPromiseId, aSessionId);
  CDM()->CloseSession(aPromiseId, aSessionId, aSessionIdLength);
}

void
WidevineDecryptor::RemoveSession(uint32_t aPromiseId,
                                 const char* aSessionId,
                                 uint32_t aSessionIdLength)
{
  Log("Decryptor::RemoveSession(%s)", aSessionId);
  CDM()->RemoveSession(aPromiseId, aSessionId, aSessionIdLength);
}

void
WidevineDecryptor::SetServerCertificate(uint32_t aPromiseId,
                                        const uint8_t* aServerCert,
                                        uint32_t aServerCertSize)
{
  Log("Decryptor::SetServerCertificate()");
  CDM()->SetServerCertificate(aPromiseId, aServerCert, aServerCertSize);
}

class WidevineDecryptedBlock : public cdm::DecryptedBlock {
public:

  WidevineDecryptedBlock()
    : mBuffer(nullptr)
    , mTimestamp(0)
  {
  }

  ~WidevineDecryptedBlock() {
    if (mBuffer) {
      mBuffer->Destroy();
      mBuffer = nullptr;
    }
  }

  void SetDecryptedBuffer(cdm::Buffer* aBuffer) override {
    mBuffer = aBuffer;
  }

  cdm::Buffer* DecryptedBuffer() override {
    return mBuffer;
  }

  void SetTimestamp(int64_t aTimestamp) override {
    mTimestamp = aTimestamp;
  }

  int64_t Timestamp() const override {
    return mTimestamp;
  }

private:
  cdm::Buffer* mBuffer;
  int64_t mTimestamp;
};

void
WidevineDecryptor::Decrypt(GMPBuffer* aBuffer,
                           GMPEncryptedBufferMetadata* aMetadata)
{
  if (!mCallback) {
    Log("WidevineDecryptor::Decrypt() this=%p FAIL; !mCallback", this);
    return;
  }
  const GMPEncryptedBufferMetadata* crypto = aMetadata;
  InputBuffer sample;
  nsTArray<SubsampleEntry> subsamples;
  InitInputBuffer(crypto, aBuffer->Id(), aBuffer->Data(), aBuffer->Size(), sample, subsamples);
  WidevineDecryptedBlock decrypted;
  Status rv = CDM()->Decrypt(sample, &decrypted);
  Log("Decryptor::Decrypt(timestamp=%lld) rv=%d sz=%d",
      sample.timestamp, rv, decrypted.DecryptedBuffer()->Size());
  if (rv == kSuccess) {
    aBuffer->Resize(decrypted.DecryptedBuffer()->Size());
    memcpy(aBuffer->Data(),
           decrypted.DecryptedBuffer()->Data(),
           decrypted.DecryptedBuffer()->Size());
  }
  mCallback->Decrypted(aBuffer, ToGMPErr(rv));
}

void
WidevineDecryptor::DecryptingComplete()
{
  Log("WidevineDecryptor::DecryptingComplete() this=%p", this);
  // Drop our references to the CDMWrapper. When any other references
  // held elsewhere are dropped (for example references held by a
  // WidevineVideoDecoder, or a runnable), the CDMWrapper destroys
  // the CDM.
  mCDM = nullptr;
  sDecryptors.erase(mInstanceId);
  mCallback = nullptr;
  Release();
}

class WidevineBuffer : public cdm::Buffer {
public:
  explicit WidevineBuffer(size_t aSize) {
    Log("WidevineBuffer(size=" PRIuSIZE ") created", aSize);
    mBuffer.SetLength(aSize);
  }
  ~WidevineBuffer() {
    Log("WidevineBuffer(size=" PRIuSIZE ") destroyed", Size());
  }
  void Destroy() override { delete this; }
  uint32_t Capacity() const override { return mBuffer.Length(); };
  uint8_t* Data() override { return mBuffer.Elements(); }
  void SetSize(uint32_t aSize) override { mBuffer.SetLength(aSize); }
  uint32_t Size() const override { return mBuffer.Length(); }

private:
  WidevineBuffer(const WidevineBuffer&);
  void operator=(const WidevineBuffer&);

  nsTArray<uint8_t> mBuffer;
};

Buffer*
WidevineDecryptor::Allocate(uint32_t aCapacity)
{
  Log("Decryptor::Allocate(capacity=%u)", aCapacity);
  return new WidevineBuffer(aCapacity);
}

class TimerTask : public GMPTask {
public:
  TimerTask(WidevineDecryptor* aDecryptor,
            RefPtr<CDMWrapper> aCDM,
            void* aContext)
    : mDecryptor(aDecryptor)
    , mCDM(aCDM)
    , mContext(aContext)
  {
  }
  ~TimerTask() override {}
  void Run() override {
    mCDM->GetCDM()->TimerExpired(mContext);
  }
  void Destroy() override { delete this; }
private:
  RefPtr<WidevineDecryptor> mDecryptor;
  RefPtr<CDMWrapper> mCDM;
  void* mContext;
};

void
WidevineDecryptor::SetTimer(int64_t aDelayMs, void* aContext)
{
  Log("Decryptor::SetTimer(delay_ms=%lld, context=0x%x)", aDelayMs, aContext);
  if (mCDM) {
    GMPSetTimerOnMainThread(new TimerTask(this, mCDM, aContext), aDelayMs);
  }
}

Time
WidevineDecryptor::GetCurrentWallTime()
{
  return base::Time::Now().ToDoubleT();
}

void
WidevineDecryptor::OnResolveNewSessionPromise(uint32_t aPromiseId,
                                              const char* aSessionId,
                                              uint32_t aSessionIdSize)
{
  if (!mCallback) {
    Log("Decryptor::OnResolveNewSessionPromise(aPromiseId=0x%d) FAIL; !mCallback", aPromiseId);
    return;
  }
  Log("Decryptor::OnResolveNewSessionPromise(aPromiseId=0x%d)", aPromiseId);
  auto iter = mPromiseIdToNewSessionTokens.find(aPromiseId);
  if (iter == mPromiseIdToNewSessionTokens.end()) {
    Log("FAIL: Decryptor::OnResolveNewSessionPromise(aPromiseId=%d) unknown aPromiseId", aPromiseId);
    return;
  }
  mCallback->SetSessionId(iter->second, aSessionId, aSessionIdSize);
  mCallback->ResolvePromise(aPromiseId);
  mPromiseIdToNewSessionTokens.erase(iter);
}

void
WidevineDecryptor::OnResolvePromise(uint32_t aPromiseId)
{
  if (!mCallback) {
    Log("Decryptor::OnResolvePromise(aPromiseId=0x%d) FAIL; !mCallback", aPromiseId);
    return;
  }
  Log("Decryptor::OnResolvePromise(aPromiseId=%d)", aPromiseId);
  mCallback->ResolvePromise(aPromiseId);
}

static GMPDOMException
ToGMPDOMException(cdm::Error aError)
{
  switch (aError) {
    case kNotSupportedError: return kGMPNotSupportedError;
    case kInvalidStateError: return kGMPInvalidStateError;
    case kInvalidAccessError:
      // Note: Chrome converts kInvalidAccessError to TypeError, since the
      // Chromium CDM API doesn't have a type error enum value. The EME spec
      // requires TypeError in some places, so we do the same conversion.
      // See bug 1313202.
      return kGMPTypeError;
    case kQuotaExceededError: return kGMPQuotaExceededError;
    case kUnknownError: return kGMPInvalidModificationError; // Note: Unique placeholder.
    case kClientError: return kGMPAbortError; // Note: Unique placeholder.
    case kOutputError: return kGMPSecurityError; // Note: Unique placeholder.
  };
  return kGMPTimeoutError; // Note: Unique placeholder.
}

void
WidevineDecryptor::OnRejectPromise(uint32_t aPromiseId,
                                   Error aError,
                                   uint32_t aSystemCode,
                                   const char* aErrorMessage,
                                   uint32_t aErrorMessageSize)
{
  if (!mCallback) {
    Log("Decryptor::OnRejectPromise(aPromiseId=%d, err=%d, sysCode=%u, msg=%s) FAIL; !mCallback",
        aPromiseId, (int)aError, aSystemCode, aErrorMessage);
    return;
  }
  Log("Decryptor::OnRejectPromise(aPromiseId=%d, err=%d, sysCode=%u, msg=%s)",
      aPromiseId, (int)aError, aSystemCode, aErrorMessage);
  mCallback->RejectPromise(aPromiseId,
                           ToGMPDOMException(aError),
                           !aErrorMessageSize ? "" : aErrorMessage,
                           aErrorMessageSize);
}

static GMPSessionMessageType
ToGMPMessageType(MessageType message_type)
{
  switch (message_type) {
    case kLicenseRequest: return kGMPLicenseRequest;
    case kLicenseRenewal: return kGMPLicenseRenewal;
    case kLicenseRelease: return kGMPLicenseRelease;
  }
  return kGMPMessageInvalid;
}

void
WidevineDecryptor::OnSessionMessage(const char* aSessionId,
                                    uint32_t aSessionIdSize,
                                    MessageType aMessageType,
                                    const char* aMessage,
                                    uint32_t aMessageSize,
                                    const char* aLegacyDestinationUrl,
                                    uint32_t aLegacyDestinationUrlLength)
{
  if (!mCallback) {
    Log("Decryptor::OnSessionMessage() FAIL; !mCallback");
    return;
  }
  Log("Decryptor::OnSessionMessage()");
  mCallback->SessionMessage(aSessionId,
                            aSessionIdSize,
                            ToGMPMessageType(aMessageType),
                            reinterpret_cast<const uint8_t*>(aMessage),
                            aMessageSize);
}

static GMPMediaKeyStatus
ToGMPKeyStatus(KeyStatus aStatus)
{
  switch (aStatus) {
    case kUsable: return kGMPUsable;
    case kInternalError: return kGMPInternalError;
    case kExpired: return kGMPExpired;
    case kOutputRestricted: return kGMPOutputRestricted;
    case kOutputDownscaled: return kGMPOutputDownscaled;
    case kStatusPending: return kGMPStatusPending;
    case kReleased: return kGMPReleased;
  }
  return kGMPUnknown;
}

void
WidevineDecryptor::OnSessionKeysChange(const char* aSessionId,
                                       uint32_t aSessionIdSize,
                                       bool aHasAdditionalUsableKey,
                                       const KeyInformation* aKeysInfo,
                                       uint32_t aKeysInfoCount)
{
  if (!mCallback) {
    Log("Decryptor::OnSessionKeysChange() FAIL; !mCallback");
    return;
  }
  Log("Decryptor::OnSessionKeysChange()");

  nsTArray<GMPMediaKeyInfo> key_infos;
  for (uint32_t i = 0; i < aKeysInfoCount; i++) {
    key_infos.AppendElement(GMPMediaKeyInfo(aKeysInfo[i].key_id,
                                            aKeysInfo[i].key_id_size,
                                            ToGMPKeyStatus(aKeysInfo[i].status)));
  }
  mCallback->BatchedKeyStatusChanged(aSessionId, aSessionIdSize,
                                     key_infos.Elements(), key_infos.Length());
}

static GMPTimestamp
ToGMPTime(Time aCDMTime)
{
  return static_cast<GMPTimestamp>(aCDMTime * 1000);
}

void
WidevineDecryptor::OnExpirationChange(const char* aSessionId,
                                      uint32_t aSessionIdSize,
                                      Time aNewExpiryTime)
{
  if (!mCallback) {
    Log("Decryptor::OnExpirationChange(sid=%s) t=%lf FAIL; !mCallback",
        aSessionId, aNewExpiryTime);
    return;
  }
  Log("Decryptor::OnExpirationChange(sid=%s) t=%lf", aSessionId, aNewExpiryTime);
  GMPTimestamp expiry = ToGMPTime(aNewExpiryTime);
  if (aNewExpiryTime == 0) {
    return;
  }
  mCallback->ExpirationChange(aSessionId, aSessionIdSize, expiry);
}

void
WidevineDecryptor::OnSessionClosed(const char* aSessionId,
                                   uint32_t aSessionIdSize)
{
  if (!mCallback) {
    Log("Decryptor::OnSessionClosed(sid=%s) FAIL; !mCallback", aSessionId);
    return;
  }
  Log("Decryptor::OnSessionClosed(sid=%s)", aSessionId);
  mCallback->SessionClosed(aSessionId, aSessionIdSize);
}

void
WidevineDecryptor::OnLegacySessionError(const char* aSessionId,
                                        uint32_t aSessionIdLength,
                                        Error aError,
                                        uint32_t aSystemCode,
                                        const char* aErrorMessage,
                                        uint32_t aErrorMessageLength)
{
  if (!mCallback) {
    Log("Decryptor::OnLegacySessionError(sid=%s, error=%d) FAIL; !mCallback",
        aSessionId, (int)aError);
    return;
  }
  Log("Decryptor::OnLegacySessionError(sid=%s, error=%d)", aSessionId, (int)aError);
  mCallback->SessionError(aSessionId,
                          aSessionIdLength,
                          ToGMPDOMException(aError),
                          aSystemCode,
                          aErrorMessage,
                          aErrorMessageLength);
}

void
WidevineDecryptor::SendPlatformChallenge(const char* aServiceId,
                                         uint32_t aServiceIdSize,
                                         const char* aChallenge,
                                         uint32_t aChallengeSize)
{
  Log("Decryptor::SendPlatformChallenge(service_id=%s)", aServiceId);
}

void
WidevineDecryptor::EnableOutputProtection(uint32_t aDesiredProtectionMask)
{
  Log("Decryptor::EnableOutputProtection(mask=0x%x)", aDesiredProtectionMask);
}

void
WidevineDecryptor::QueryOutputProtectionStatus()
{
  Log("Decryptor::QueryOutputProtectionStatus()");
}

void
WidevineDecryptor::OnDeferredInitializationDone(StreamType aStreamType,
                                                Status aDecoderStatus)
{
  Log("Decryptor::OnDeferredInitializationDone()");
}

FileIO*
WidevineDecryptor::CreateFileIO(FileIOClient* aClient)
{
  Log("Decryptor::CreateFileIO()");
  if (!mPersistentStateRequired) {
    return nullptr;
  }
  return new WidevineFileIO(aClient);
}

} // namespace mozilla