summaryrefslogtreecommitdiff
path: root/security/manager/ssl/TransportSecurityInfo.cpp
blob: 3c7023302b48ebf8a58db9813a313e58e4e8f854 (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
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
/* -*- 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 "TransportSecurityInfo.h"

#include "PSMRunnable.h"
#include "mozilla/Casting.h"
#include "nsComponentManagerUtils.h"
#include "nsIArray.h"
#include "nsICertOverrideService.h"
#include "nsIDateTimeFormat.h"
#include "nsIObjectInputStream.h"
#include "nsIObjectOutputStream.h"
#include "nsIWebProgressListener.h"
#include "nsIX509CertValidity.h"
#include "nsNSSCertHelper.h"
#include "nsNSSCertificate.h"
#include "nsNSSComponent.h"
#include "nsReadableUtils.h"
#include "nsServiceManagerUtils.h"
#include "nsXULAppAPI.h"
#include "pkix/pkixtypes.h"
#include "secerr.h"

//#define DEBUG_SSL_VERBOSE //Enable this define to get minimal 
                            //reports when doing SSL read/write

//#define DUMP_BUFFER  //Enable this define along with
                       //DEBUG_SSL_VERBOSE to dump SSL
                       //read/write buffer to a log.
                       //Uses PR_LOG except on Mac where
                       //we always write out to our own
                       //file.

namespace mozilla { namespace psm {

TransportSecurityInfo::TransportSecurityInfo()
  : mMutex("TransportSecurityInfo::mMutex"),
    mSecurityState(nsIWebProgressListener::STATE_IS_INSECURE),
    mSubRequestsBrokenSecurity(0),
    mSubRequestsNoSecurity(0),
    mErrorCode(0),
    mErrorMessageType(PlainErrorMessage),
    mPort(0)
{
}

TransportSecurityInfo::~TransportSecurityInfo()
{
  nsNSSShutDownPreventionLock locker;
  if (isAlreadyShutDown())
    return;

  shutdown(ShutdownCalledFrom::Object);
}

void
TransportSecurityInfo::virtualDestroyNSSReference()
{
}

NS_IMPL_ISUPPORTS(TransportSecurityInfo,
                  nsITransportSecurityInfo,
                  nsIInterfaceRequestor,
                  nsISSLStatusProvider,
                  nsIAssociatedContentSecurity,
                  nsISerializable,
                  nsIClassInfo)

nsresult
TransportSecurityInfo::SetHostName(const char* host)
{
  mHostName.Adopt(host ? NS_strdup(host) : 0);
  return NS_OK;
}

nsresult
TransportSecurityInfo::GetHostName(char **host)
{
  *host = (mHostName) ? NS_strdup(mHostName) : nullptr;
  return NS_OK;
}

nsresult
TransportSecurityInfo::SetPort(int32_t aPort)
{
  mPort = aPort;
  return NS_OK;
}

nsresult
TransportSecurityInfo::GetPort(int32_t *aPort)
{
  *aPort = mPort;
  return NS_OK;
}

nsresult
TransportSecurityInfo::SetOriginAttributes(
  const NeckoOriginAttributes& aOriginAttributes)
{
  mOriginAttributes = aOriginAttributes;
  return NS_OK;
}

PRErrorCode
TransportSecurityInfo::GetErrorCode() const
{
  MutexAutoLock lock(mMutex);

  return mErrorCode;
}

void
TransportSecurityInfo::SetCanceled(PRErrorCode errorCode,
                                   SSLErrorMessageType errorMessageType)
{
  MutexAutoLock lock(mMutex);

  mErrorCode = errorCode;
  mErrorMessageType = errorMessageType;
  mErrorMessageCached.Truncate();
}

NS_IMETHODIMP
TransportSecurityInfo::GetSecurityState(uint32_t* state)
{
  *state = mSecurityState;
  return NS_OK;
}

nsresult
TransportSecurityInfo::SetSecurityState(uint32_t aState)
{
  mSecurityState = aState;
  return NS_OK;
}

NS_IMETHODIMP
TransportSecurityInfo::GetCountSubRequestsBrokenSecurity(
  int32_t *aSubRequestsBrokenSecurity)
{
  *aSubRequestsBrokenSecurity = mSubRequestsBrokenSecurity;
  return NS_OK;
}

NS_IMETHODIMP
TransportSecurityInfo::SetCountSubRequestsBrokenSecurity(
  int32_t aSubRequestsBrokenSecurity)
{
  mSubRequestsBrokenSecurity = aSubRequestsBrokenSecurity;
  return NS_OK;
}

NS_IMETHODIMP
TransportSecurityInfo::GetCountSubRequestsNoSecurity(
  int32_t *aSubRequestsNoSecurity)
{
  *aSubRequestsNoSecurity = mSubRequestsNoSecurity;
  return NS_OK;
}

NS_IMETHODIMP
TransportSecurityInfo::SetCountSubRequestsNoSecurity(
  int32_t aSubRequestsNoSecurity)
{
  mSubRequestsNoSecurity = aSubRequestsNoSecurity;
  return NS_OK;
}

NS_IMETHODIMP
TransportSecurityInfo::Flush()
{
  return NS_OK;
}

NS_IMETHODIMP
TransportSecurityInfo::GetErrorMessage(char16_t** aText)
{
  NS_ENSURE_ARG_POINTER(aText);
  *aText = nullptr;

  if (!NS_IsMainThread()) {
    NS_ERROR("nsNSSSocketInfo::GetErrorMessage called off the main thread");
    return NS_ERROR_NOT_SAME_THREAD;
  }

  MutexAutoLock lock(mMutex);

  if (mErrorMessageCached.IsEmpty()) {
    nsresult rv = formatErrorMessage(lock, 
                                     mErrorCode, mErrorMessageType,
                                     true, true, mErrorMessageCached);
    NS_ENSURE_SUCCESS(rv, rv);
  }

  *aText = ToNewUnicode(mErrorMessageCached);
  return *aText ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
}

void
TransportSecurityInfo::GetErrorLogMessage(PRErrorCode errorCode,
                                          SSLErrorMessageType errorMessageType,
                                          nsString &result)
{
  if (!NS_IsMainThread()) {
    NS_ERROR("nsNSSSocketInfo::GetErrorLogMessage called off the main thread");
    return;
  }

  MutexAutoLock lock(mMutex);
  (void) formatErrorMessage(lock, errorCode, errorMessageType,
                            false, false, result);
}

static nsresult
formatPlainErrorMessage(nsXPIDLCString const & host, int32_t port,
                        PRErrorCode err, 
                        bool suppressPort443,
                        nsString &returnedMessage);

static nsresult
formatOverridableCertErrorMessage(nsISSLStatus & sslStatus,
                                  PRErrorCode errorCodeToReport, 
                                  const nsXPIDLCString & host, int32_t port,
                                  bool suppressPort443,
                                  bool wantsHtml,
                                  nsString & returnedMessage);

// XXX: uses nsNSSComponent string bundles off the main thread when called by
//      nsNSSSocketInfo::Write().
nsresult
TransportSecurityInfo::formatErrorMessage(MutexAutoLock const & proofOfLock, 
                                          PRErrorCode errorCode,
                                          SSLErrorMessageType errorMessageType,
                                          bool wantsHtml, bool suppressPort443, 
                                          nsString &result)
{
  result.Truncate();
  if (errorCode == 0) {
    return NS_OK;
  }

  if (!XRE_IsParentProcess()) {
    return NS_ERROR_UNEXPECTED;
  }

  nsresult rv;
  NS_ConvertASCIItoUTF16 hostNameU(mHostName);
  NS_ASSERTION(errorMessageType != OverridableCertErrorMessage || 
                (mSSLStatus && mSSLStatus->HasServerCert() &&
                 mSSLStatus->mHaveCertErrorBits),
                "GetErrorLogMessage called for cert error without cert");
  if (errorMessageType == OverridableCertErrorMessage && 
      mSSLStatus && mSSLStatus->HasServerCert()) {
    rv = formatOverridableCertErrorMessage(*mSSLStatus, errorCode,
                                           mHostName, mPort,
                                           suppressPort443,
                                           wantsHtml,
                                           result);
  } else {
    rv = formatPlainErrorMessage(mHostName, mPort, 
                                 errorCode,
                                 suppressPort443,
                                 result);
  }

  if (NS_FAILED(rv)) {
    result.Truncate();
  }

  return rv;
}

NS_IMETHODIMP
TransportSecurityInfo::GetErrorCode(int32_t* state)
{
  *state = GetErrorCode();
  return NS_OK;
}

NS_IMETHODIMP
TransportSecurityInfo::GetInterface(const nsIID & uuid, void * *result)
{
  if (!NS_IsMainThread()) {
    NS_ERROR("nsNSSSocketInfo::GetInterface called off the main thread");
    return NS_ERROR_NOT_SAME_THREAD;
  }

  nsresult rv;
  if (!mCallbacks) {
    nsCOMPtr<nsIInterfaceRequestor> ir = new PipUIContext();
    rv = ir->GetInterface(uuid, result);
  } else {
    rv = mCallbacks->GetInterface(uuid, result);
  }
  return rv;
}

// This is a new magic value. However, it re-uses the first 4 bytes
// of the previous value. This is so when older versions attempt to
// read a newer serialized TransportSecurityInfo, they will actually
// fail and return NS_ERROR_FAILURE instead of silently failing.
#define TRANSPORTSECURITYINFOMAGIC { 0xa9863a23, 0xa940, 0x4002, \
  { 0x94, 0x3c, 0x43, 0xc4, 0x67, 0x38, 0x8f, 0x3d } }
static NS_DEFINE_CID(kTransportSecurityInfoMagic, TRANSPORTSECURITYINFOMAGIC);

NS_IMETHODIMP
TransportSecurityInfo::Write(nsIObjectOutputStream* stream)
{
  nsresult rv = stream->WriteID(kTransportSecurityInfoMagic);
  if (NS_FAILED(rv)) {
    return rv;
  }

  MutexAutoLock lock(mMutex);

  rv = stream->Write32(mSecurityState);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = stream->Write32(mSubRequestsBrokenSecurity);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = stream->Write32(mSubRequestsNoSecurity);
  if (NS_FAILED(rv)) {
    return rv;
  }
  rv = stream->Write32(static_cast<uint32_t>(mErrorCode));
  if (NS_FAILED(rv)) {
    return rv;
  }
  if (mErrorMessageCached.IsEmpty()) {
    // XXX: uses nsNSSComponent string bundles off the main thread
    rv = formatErrorMessage(lock, mErrorCode, mErrorMessageType,
                            true, true, mErrorMessageCached);
    if (NS_FAILED(rv)) {
      return rv;
    }
  }
  rv = stream->WriteWStringZ(mErrorMessageCached.get());
  if (NS_FAILED(rv)) {
    return rv;
  }

  // For successful connections and for connections with overridable errors,
  // mSSLStatus will be non-null. However, for connections with non-overridable
  // errors, it will be null.
  nsCOMPtr<nsISerializable> serializable(mSSLStatus);
  rv = NS_WriteOptionalCompoundObject(stream,
                                      serializable,
                                      NS_GET_IID(nsISSLStatus),
                                      true);
  if (NS_FAILED(rv)) {
    return rv;
  }

  rv = NS_WriteOptionalCompoundObject(stream,
                                      mFailedCertChain,
                                      NS_GET_IID(nsIX509CertList),
                                      true);
  if (NS_FAILED(rv)) {
    return rv;
  }

  return NS_OK;
}

NS_IMETHODIMP
TransportSecurityInfo::Read(nsIObjectInputStream* stream)
{
  nsID id;
  nsresult rv = stream->ReadID(&id);
  if (NS_FAILED(rv)) {
    return rv;
  }
  if (!id.Equals(kTransportSecurityInfoMagic)) {
    return NS_ERROR_UNEXPECTED;
  }

  MutexAutoLock lock(mMutex);

  rv = stream->Read32(&mSecurityState);
  if (NS_FAILED(rv)) {
    return rv;
  }
  uint32_t subRequestsBrokenSecurity;
  rv = stream->Read32(&subRequestsBrokenSecurity);
  if (NS_FAILED(rv)) {
    return rv;
  }
  if (subRequestsBrokenSecurity >
      static_cast<uint32_t>(std::numeric_limits<int32_t>::max())) {
    return NS_ERROR_UNEXPECTED;
  }
  mSubRequestsBrokenSecurity = subRequestsBrokenSecurity;
  uint32_t subRequestsNoSecurity;
  rv = stream->Read32(&subRequestsNoSecurity);
  if (NS_FAILED(rv)) {
    return rv;
  }
  if (subRequestsNoSecurity >
      static_cast<uint32_t>(std::numeric_limits<int32_t>::max())) {
    return NS_ERROR_UNEXPECTED;
  }
  mSubRequestsNoSecurity = subRequestsNoSecurity;
  uint32_t errorCode;
  rv = stream->Read32(&errorCode);
  if (NS_FAILED(rv)) {
    return rv;
  }
  // PRErrorCode will be a negative value
  mErrorCode = static_cast<PRErrorCode>(errorCode);

  rv = stream->ReadString(mErrorMessageCached);
  if (NS_FAILED(rv)) {
    return rv;
  }

  // For successful connections and for connections with overridable errors,
  // mSSLStatus will be non-null. For connections with non-overridable errors,
  // it will be null.
  nsCOMPtr<nsISupports> supports;
  rv = NS_ReadOptionalObject(stream, true, getter_AddRefs(supports));
  if (NS_FAILED(rv)) {
    return rv;
  }
  nsCOMPtr<nsISSLStatus> castGuard(do_QueryInterface(supports));
  if (castGuard) {
    mSSLStatus = BitwiseCast<nsSSLStatus*, nsISSLStatus*>(castGuard.get());
  } else {
    mSSLStatus = nullptr;
  }

  nsCOMPtr<nsISupports> failedCertChainSupports;
  rv = NS_ReadOptionalObject(stream, true, getter_AddRefs(failedCertChainSupports));
  if (NS_FAILED(rv)) {
    return rv;
  }
  mFailedCertChain = do_QueryInterface(failedCertChainSupports);

  return NS_OK;
}

NS_IMETHODIMP
TransportSecurityInfo::GetInterfaces(uint32_t *count, nsIID * **array)
{
  *count = 0;
  *array = nullptr;
  return NS_OK;
}

NS_IMETHODIMP
TransportSecurityInfo::GetScriptableHelper(nsIXPCScriptable **_retval)
{
  *_retval = nullptr;
  return NS_OK;
}

NS_IMETHODIMP
TransportSecurityInfo::GetContractID(char * *aContractID)
{
  *aContractID = nullptr;
  return NS_OK;
}

NS_IMETHODIMP
TransportSecurityInfo::GetClassDescription(char * *aClassDescription)
{
  *aClassDescription = nullptr;
  return NS_OK;
}

NS_IMETHODIMP
TransportSecurityInfo::GetClassID(nsCID * *aClassID)
{
  *aClassID = (nsCID*) moz_xmalloc(sizeof(nsCID));
  if (!*aClassID)
    return NS_ERROR_OUT_OF_MEMORY;
  return GetClassIDNoAlloc(*aClassID);
}

NS_IMETHODIMP
TransportSecurityInfo::GetFlags(uint32_t *aFlags)
{
  *aFlags = 0;
  return NS_OK;
}

static NS_DEFINE_CID(kNSSSocketInfoCID, TRANSPORTSECURITYINFO_CID);

NS_IMETHODIMP
TransportSecurityInfo::GetClassIDNoAlloc(nsCID *aClassIDNoAlloc)
{
  *aClassIDNoAlloc = kNSSSocketInfoCID;
  return NS_OK;
}

nsresult
TransportSecurityInfo::GetSSLStatus(nsISSLStatus** _result)
{
  NS_ENSURE_ARG_POINTER(_result);

  *_result = mSSLStatus;
  NS_IF_ADDREF(*_result);

  return NS_OK;
}

nsresult
TransportSecurityInfo::SetSSLStatus(nsSSLStatus *aSSLStatus)
{
  mSSLStatus = aSSLStatus;

  return NS_OK;
}

/* Formats an error message for non-certificate-related SSL errors
 * and non-overridable certificate errors (both are of type
 * PlainErrormMessage). Use formatOverridableCertErrorMessage
 * for overridable cert errors.
 */
static nsresult
formatPlainErrorMessage(const nsXPIDLCString &host, int32_t port,
                        PRErrorCode err, 
                        bool suppressPort443,
                        nsString &returnedMessage)
{
  static NS_DEFINE_CID(kNSSComponentCID, NS_NSSCOMPONENT_CID);

  const char16_t *params[1];
  nsresult rv;

  nsCOMPtr<nsINSSComponent> component = do_GetService(kNSSComponentCID, &rv);
  NS_ENSURE_SUCCESS(rv, rv);

  if (host.Length())
  {
    nsString hostWithPort;

    // For now, hide port when it's 443 and we're reporting the error.
    // In the future a better mechanism should be used
    // to make a decision about showing the port number, possibly by requiring
    // the context object to implement a specific interface.
    // The motivation is that Mozilla browser would like to hide the port number
    // in error pages in the common case.

    hostWithPort.AssignASCII(host);
    if (!suppressPort443 || port != 443) {
      hostWithPort.Append(':');
      hostWithPort.AppendInt(port);
    }
    params[0] = hostWithPort.get();

    nsString formattedString;
    rv = component->PIPBundleFormatStringFromName("SSLConnectionErrorPrefix", 
                                                  params, 1, 
                                                  formattedString);
    if (NS_SUCCEEDED(rv))
    {
      returnedMessage.Append(formattedString);
      returnedMessage.AppendLiteral("\n\n");
    }
  }

  nsString explanation;
  rv = nsNSSErrors::getErrorMessageFromCode(err, component, explanation);
  if (NS_SUCCEEDED(rv))
    returnedMessage.Append(explanation);

  return NS_OK;
}

static void
AppendErrorTextUntrusted(PRErrorCode errTrust,
                         const nsString &host,
                         nsIX509Cert* ix509,
                         nsINSSComponent *component,
                         nsString &returnedMessage)
{
  const char* errorID = nullptr;
  const char* errorID2 = nullptr;
  const char* errorID3 = nullptr;
  bool isSelfSigned;
  if (NS_SUCCEEDED(ix509->GetIsSelfSigned(&isSelfSigned)) && isSelfSigned) {
    errorID = "certErrorTrust_SelfSigned";
  }

  if (!errorID) {
    switch (errTrust) {
      case SEC_ERROR_UNKNOWN_ISSUER:
        errorID = "certErrorTrust_UnknownIssuer";
        errorID2 = "certErrorTrust_UnknownIssuer2";
        errorID3 = "certErrorTrust_UnknownIssuer3";
        break;
      case SEC_ERROR_CA_CERT_INVALID:
        errorID = "certErrorTrust_CaInvalid";
        break;
      case SEC_ERROR_UNTRUSTED_ISSUER:
        errorID = "certErrorTrust_Issuer";
        break;
      case SEC_ERROR_CERT_SIGNATURE_ALGORITHM_DISABLED:
        errorID = "certErrorTrust_SignatureAlgorithmDisabled";
        break;
      case SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE:
        errorID = "certErrorTrust_ExpiredIssuer";
        break;
      case SEC_ERROR_UNTRUSTED_CERT:
      default:
        errorID = "certErrorTrust_Untrusted";
        break;
    }
  }

  const char* errorIDs[] = { errorID, errorID2, errorID3 };
  for (size_t i = 0; i < ArrayLength(errorIDs); i++) {
    if (!errorIDs[i]) {
      break;
    }

    nsString formattedString;
    nsresult rv = component->GetPIPNSSBundleString(errorIDs[i], formattedString);
    if (NS_SUCCEEDED(rv)) {
      returnedMessage.Append(formattedString);
      returnedMessage.Append('\n');
    }
  }
}

// Returns the number of dNSName or iPAddress entries encountered in the
// subject alternative name extension of the certificate.
// Returns zero if the extension is not present, could not be decoded, or if it
// does not contain any dNSName or iPAddress entries.
static uint32_t
GetSubjectAltNames(CERTCertificate* nssCert, nsString& allNames)
{
  allNames.Truncate();

  ScopedAutoSECItem altNameExtension;
  SECStatus rv = CERT_FindCertExtension(nssCert, SEC_OID_X509_SUBJECT_ALT_NAME,
                                        &altNameExtension);
  if (rv != SECSuccess) {
    return 0;
  }
  UniquePLArenaPool arena(PORT_NewArena(DER_DEFAULT_CHUNKSIZE));
  if (!arena) {
    return 0;
  }
  CERTGeneralName* sanNameList(CERT_DecodeAltNameExtension(arena.get(),
                                                           &altNameExtension));
  if (!sanNameList) {
    return 0;
  }

  uint32_t nameCount = 0;
  CERTGeneralName* current = sanNameList;
  do {
    nsAutoString name;
    switch (current->type) {
      case certDNSName:
        {
          nsDependentCSubstring nameFromCert(BitwiseCast<char*, unsigned char*>(
                                               current->name.other.data),
                                             current->name.other.len);
          // dNSName fields are defined as type IA5String and thus should
          // be limited to ASCII characters.
          if (IsASCII(nameFromCert)) {
            name.Assign(NS_ConvertASCIItoUTF16(nameFromCert));
            if (!allNames.IsEmpty()) {
              allNames.AppendLiteral(", ");
            }
            ++nameCount;
            allNames.Append(name);
          }
        }
        break;

      case certIPAddress:
        {
          char buf[INET6_ADDRSTRLEN];
          PRNetAddr addr;
          if (current->name.other.len == 4) {
            addr.inet.family = PR_AF_INET;
            memcpy(&addr.inet.ip, current->name.other.data, current->name.other.len);
            PR_NetAddrToString(&addr, buf, sizeof(buf));
            name.AssignASCII(buf);
          } else if (current->name.other.len == 16) {
            addr.ipv6.family = PR_AF_INET6;
            memcpy(&addr.ipv6.ip, current->name.other.data, current->name.other.len);
            PR_NetAddrToString(&addr, buf, sizeof(buf));
            name.AssignASCII(buf);
          } else {
            /* invalid IP address */
          }
          if (!name.IsEmpty()) {
            if (!allNames.IsEmpty()) {
              allNames.AppendLiteral(", ");
            }
            ++nameCount;
            allNames.Append(name);
          }
          break;
        }

      default: // all other types of names are ignored
        break;
    }
    current = CERT_GetNextGeneralName(current);
  } while (current != sanNameList); // double linked

  return nameCount;
}

static nsresult
AppendErrorTextMismatch(const nsString& host, nsIX509Cert* ix509,
                        nsINSSComponent* component, bool wantsHtml,
                        nsString& returnedMessage)
{
  // Prepare a default "not valid for <hostname>" string in case anything
  // goes wrong (or in case the certificate is not valid for any hostnames).
  nsAutoString notValidForHostnameString;
  const char16_t* params[1];
  params[0] = host.get();
  nsresult rv = component->PIPBundleFormatStringFromName(
    "certErrorMismatch", params, 1, notValidForHostnameString);
  if (NS_FAILED(rv)) {
    return rv;
  }
  notValidForHostnameString.Append('\n');

  UniqueCERTCertificate nssCert(ix509->GetCert());
  if (!nssCert) {
    returnedMessage.Append(notValidForHostnameString);
    return NS_OK;
  }

  nsAutoString allNames;
  uint32_t nameCount = GetSubjectAltNames(nssCert.get(), allNames);
  if (nameCount == 0) {
    returnedMessage.Append(notValidForHostnameString);
  } else if (nameCount > 1) {
    nsString message;
    rv = component->GetPIPNSSBundleString("certErrorMismatchMultiple", message);
    if (NS_FAILED(rv)) {
      return rv;
    }
    returnedMessage.Append(message);
    returnedMessage.AppendLiteral("\n  ");
    returnedMessage.Append(allNames);
    returnedMessage.AppendLiteral("  \n");
  } else if (nameCount == 1) {
    params[0] = allNames.get();

    const char* stringID = wantsHtml ? "certErrorMismatchSingle2"
                                     : "certErrorMismatchSinglePlain";
    nsAutoString formattedString;
    rv = component->PIPBundleFormatStringFromName(stringID, params, 1,
                                                  formattedString);
    if (NS_FAILED(rv)) {
      return rv;
    }
    returnedMessage.Append(formattedString);
    returnedMessage.Append('\n');
  }

  return NS_OK;
}

static void
GetDateBoundary(nsIX509Cert* ix509,
                nsString &formattedDate,
                nsString &nowDate,
                bool &trueExpired_falseNotYetValid)
{
  trueExpired_falseNotYetValid = true;
  formattedDate.Truncate();

  PRTime notAfter, notBefore, timeToUse;
  nsCOMPtr<nsIX509CertValidity> validity;
  nsresult rv;

  rv = ix509->GetValidity(getter_AddRefs(validity));
  if (NS_FAILED(rv))
    return;

  rv = validity->GetNotAfter(&notAfter);
  if (NS_FAILED(rv))
    return;

  rv = validity->GetNotBefore(&notBefore);
  if (NS_FAILED(rv))
    return;

  PRTime now = PR_Now();
  if (now > notAfter) {
    timeToUse = notAfter;
  } else {
    timeToUse = notBefore;
    trueExpired_falseNotYetValid = false;
  }

  nsCOMPtr<nsIDateTimeFormat> dateTimeFormat = nsIDateTimeFormat::Create();
  if (!dateTimeFormat) {
    return;
  }

  dateTimeFormat->FormatPRTime(nullptr, kDateFormatLong, kTimeFormatNoSeconds,
                               timeToUse, formattedDate);
  dateTimeFormat->FormatPRTime(nullptr, kDateFormatLong, kTimeFormatNoSeconds,
                               now, nowDate);
}

static void
AppendErrorTextTime(nsIX509Cert* ix509,
                    nsINSSComponent *component,
                    nsString &returnedMessage)
{
  nsAutoString formattedDate, nowDate;
  bool trueExpired_falseNotYetValid;
  GetDateBoundary(ix509, formattedDate, nowDate, trueExpired_falseNotYetValid);

  const char16_t *params[2];
  params[0] = formattedDate.get(); // might be empty, if helper function had a problem 
  params[1] = nowDate.get();

  const char *key = trueExpired_falseNotYetValid ? 
                    "certErrorExpiredNow" : "certErrorNotYetValidNow";
  nsresult rv;
  nsString formattedString;
  rv = component->PIPBundleFormatStringFromName(
           key,
           params, 
           ArrayLength(params),
           formattedString);
  if (NS_SUCCEEDED(rv))
  {
    returnedMessage.Append(formattedString);
    returnedMessage.Append('\n');
  }
}

static void
AppendErrorTextCode(PRErrorCode errorCodeToReport,
                    nsINSSComponent *component,
                    nsString &returnedMessage)
{
  const char *codeName = nsNSSErrors::getDefaultErrorStringName(errorCodeToReport);
  if (codeName)
  {
    nsCString error_id(codeName);
    NS_ConvertASCIItoUTF16 idU(error_id);

    const char16_t *params[1];
    params[0] = idU.get();

    nsString formattedString;
    nsresult rv;
    rv = component->PIPBundleFormatStringFromName("certErrorCodePrefix",
                                                  params, 1, 
                                                  formattedString);
    if (NS_SUCCEEDED(rv)) {
      returnedMessage.Append('\n');
      returnedMessage.Append(formattedString);
      returnedMessage.Append('\n');
    }
    else {
      returnedMessage.AppendLiteral(" (");
      returnedMessage.Append(idU);
      returnedMessage.Append(')');
    }
  }
}

/* Formats an error message for overridable certificate errors (of type
 * OverridableCertErrorMessage). Use formatPlainErrorMessage to format
 * non-overridable cert errors and non-cert-related errors.
 */
static nsresult
formatOverridableCertErrorMessage(nsISSLStatus & sslStatus,
                                  PRErrorCode errorCodeToReport, 
                                  const nsXPIDLCString & host, int32_t port,
                                  bool suppressPort443,
                                  bool wantsHtml,
                                  nsString & returnedMessage)
{
  static NS_DEFINE_CID(kNSSComponentCID, NS_NSSCOMPONENT_CID);

  const char16_t *params[1];
  nsresult rv;
  nsAutoString hostWithPort;
  nsAutoString hostWithoutPort;

  // For now, hide port when it's 443 and we're reporting the error.
  // In the future a better mechanism should be used
  // to make a decision about showing the port number, possibly by requiring
  // the context object to implement a specific interface.
  // The motivation is that Mozilla browser would like to hide the port number
  // in error pages in the common case.
  
  hostWithoutPort.AppendASCII(host);
  if (suppressPort443 && port == 443) {
    params[0] = hostWithoutPort.get();
  } else {
    hostWithPort.AppendASCII(host);
    hostWithPort.Append(':');
    hostWithPort.AppendInt(port);
    params[0] = hostWithPort.get();
  }

  nsCOMPtr<nsINSSComponent> component = do_GetService(kNSSComponentCID, &rv);
  NS_ENSURE_SUCCESS(rv, rv);

  returnedMessage.Truncate();
  rv = component->PIPBundleFormatStringFromName("certErrorIntro", params, 1,
                                                returnedMessage);
  NS_ENSURE_SUCCESS(rv, rv);

  returnedMessage.AppendLiteral("\n\n");

  RefPtr<nsIX509Cert> ix509;
  rv = sslStatus.GetServerCert(getter_AddRefs(ix509));
  NS_ENSURE_SUCCESS(rv, rv);

  bool isUntrusted;
  rv = sslStatus.GetIsUntrusted(&isUntrusted);
  NS_ENSURE_SUCCESS(rv, rv);
  if (isUntrusted) {
    AppendErrorTextUntrusted(errorCodeToReport, hostWithoutPort, ix509, 
                             component, returnedMessage);
  }

  bool isDomainMismatch;
  rv = sslStatus.GetIsDomainMismatch(&isDomainMismatch);
  NS_ENSURE_SUCCESS(rv, rv);
  if (isDomainMismatch) {
    rv = AppendErrorTextMismatch(hostWithoutPort, ix509, component, wantsHtml,
                                 returnedMessage);
    NS_ENSURE_SUCCESS(rv, rv);
  }

  bool isNotValidAtThisTime;
  rv = sslStatus.GetIsNotValidAtThisTime(&isNotValidAtThisTime);
  NS_ENSURE_SUCCESS(rv, rv);
  if (isNotValidAtThisTime) {
    AppendErrorTextTime(ix509, component, returnedMessage);
  }

  AppendErrorTextCode(errorCodeToReport, component, returnedMessage);

  return NS_OK;
}

// RememberCertErrorsTable

/*static*/ RememberCertErrorsTable*
RememberCertErrorsTable::sInstance = nullptr;

RememberCertErrorsTable::RememberCertErrorsTable()
  : mErrorHosts()
  , mMutex("RememberCertErrorsTable::mMutex")
{
}

static nsresult
GetHostPortKey(TransportSecurityInfo* infoObject, nsAutoCString &result)
{
  nsresult rv;

  result.Truncate();

  nsXPIDLCString hostName;
  rv = infoObject->GetHostName(getter_Copies(hostName));
  NS_ENSURE_SUCCESS(rv, rv);

  int32_t port;
  rv = infoObject->GetPort(&port);
  NS_ENSURE_SUCCESS(rv, rv);

  result.Assign(hostName);
  result.Append(':');
  result.AppendInt(port);

  return NS_OK;
}

void
RememberCertErrorsTable::RememberCertHasError(TransportSecurityInfo* infoObject,
                                              nsSSLStatus* status,
                                              SECStatus certVerificationResult)
{
  nsresult rv;

  nsAutoCString hostPortKey;
  rv = GetHostPortKey(infoObject, hostPortKey);
  if (NS_FAILED(rv))
    return;

  if (certVerificationResult != SECSuccess) {
    NS_ASSERTION(status,
        "Must have nsSSLStatus object when remembering flags");

    if (!status)
      return;

    CertStateBits bits;
    bits.mIsDomainMismatch = status->mIsDomainMismatch;
    bits.mIsNotValidAtThisTime = status->mIsNotValidAtThisTime;
    bits.mIsUntrusted = status->mIsUntrusted;

    MutexAutoLock lock(mMutex);
    mErrorHosts.Put(hostPortKey, bits);
  }
  else {
    MutexAutoLock lock(mMutex);
    mErrorHosts.Remove(hostPortKey);
  }
}

void
RememberCertErrorsTable::LookupCertErrorBits(TransportSecurityInfo* infoObject,
                                             nsSSLStatus* status)
{
  // Get remembered error bits from our cache, because of SSL session caching
  // the NSS library potentially hasn't notified us for this socket.
  if (status->mHaveCertErrorBits)
    // Rather do not modify bits if already set earlier
    return;

  nsresult rv;

  nsAutoCString hostPortKey;
  rv = GetHostPortKey(infoObject, hostPortKey);
  if (NS_FAILED(rv))
    return;

  CertStateBits bits;
  {
    MutexAutoLock lock(mMutex);
    if (!mErrorHosts.Get(hostPortKey, &bits))
      // No record was found, this host had no cert errors
      return;
  }

  // This host had cert errors, update the bits correctly
  status->mHaveCertErrorBits = true;
  status->mIsDomainMismatch = bits.mIsDomainMismatch;
  status->mIsNotValidAtThisTime = bits.mIsNotValidAtThisTime;
  status->mIsUntrusted = bits.mIsUntrusted;
}

void
TransportSecurityInfo::SetStatusErrorBits(nsNSSCertificate* cert,
                                          uint32_t collected_errors)
{
  MutexAutoLock lock(mMutex);

  if (!mSSLStatus) {
    mSSLStatus = new nsSSLStatus();
  }

  mSSLStatus->SetServerCert(cert, EVStatus::NotEV);

  mSSLStatus->mHaveCertErrorBits = true;
  mSSLStatus->mIsDomainMismatch = 
    collected_errors & nsICertOverrideService::ERROR_MISMATCH;
  mSSLStatus->mIsNotValidAtThisTime = 
    collected_errors & nsICertOverrideService::ERROR_TIME;
  mSSLStatus->mIsUntrusted = 
    collected_errors & nsICertOverrideService::ERROR_UNTRUSTED;

  RememberCertErrorsTable::GetInstance().RememberCertHasError(this,
                                                              mSSLStatus,
                                                              SECFailure);
}

NS_IMETHODIMP
TransportSecurityInfo::GetFailedCertChain(nsIX509CertList** _result)
{
  NS_ASSERTION(_result, "non-NULL destination required");

  *_result = mFailedCertChain;
  NS_IF_ADDREF(*_result);

  return NS_OK;
}

nsresult
TransportSecurityInfo::SetFailedCertChain(UniqueCERTCertList certList)
{
  nsNSSShutDownPreventionLock lock;
  if (isAlreadyShutDown()) {
    return NS_ERROR_NOT_AVAILABLE;
  }

  // nsNSSCertList takes ownership of certList
  mFailedCertChain = new nsNSSCertList(Move(certList), lock);

  return NS_OK;
}

} } // namespace mozilla::psm