summaryrefslogtreecommitdiffstats
path: root/dom/security/nsCSPUtils.cpp
blob: 0ca8f520e912a91d0131b3fe8106f9a321627b3d (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
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "nsAttrValue.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsContentUtils.h"
#include "nsCSPUtils.h"
#include "nsDebug.h"
#include "nsIConsoleService.h"
#include "nsICryptoHash.h"
#include "nsIScriptError.h"
#include "nsIServiceManager.h"
#include "nsIStringBundle.h"
#include "nsIURL.h"
#include "nsReadableUtils.h"
#include "nsSandboxFlags.h"

#define DEFAULT_PORT -1

static mozilla::LogModule*
GetCspUtilsLog()
{
  static mozilla::LazyLogModule gCspUtilsPRLog("CSPUtils");
  return gCspUtilsPRLog;
}

#define CSPUTILSLOG(args) MOZ_LOG(GetCspUtilsLog(), mozilla::LogLevel::Debug, args)
#define CSPUTILSLOGENABLED() MOZ_LOG_TEST(GetCspUtilsLog(), mozilla::LogLevel::Debug)

void
CSP_PercentDecodeStr(const nsAString& aEncStr, nsAString& outDecStr)
{
  outDecStr.Truncate();

  // helper function that should not be visible outside this methods scope
  struct local {
    static inline char16_t convertHexDig(char16_t aHexDig) {
      if (isNumberToken(aHexDig)) {
        return aHexDig - '0';
      }
      if (aHexDig >= 'A' && aHexDig <= 'F') {
        return aHexDig - 'A' + 10;
      }
      // must be a lower case character
      // (aHexDig >= 'a' && aHexDig <= 'f')
      return aHexDig - 'a' + 10;
    }
  };

  const char16_t *cur, *end, *hexDig1, *hexDig2;
  cur = aEncStr.BeginReading();
  end = aEncStr.EndReading();

  while (cur != end) {
    // if it's not a percent sign then there is
    // nothing to do for that character
    if (*cur != PERCENT_SIGN) {
      outDecStr.Append(*cur);
      cur++;
      continue;
    }

    // get the two hexDigs following the '%'-sign
    hexDig1 = cur + 1;
    hexDig2 = cur + 2;

    // if there are no hexdigs after the '%' then
    // there is nothing to do for us.
    if (hexDig1 == end || hexDig2 == end ||
        !isValidHexDig(*hexDig1) ||
        !isValidHexDig(*hexDig2)) {
      outDecStr.Append(PERCENT_SIGN);
      cur++;
      continue;
    }

    // decode "% hexDig1 hexDig2" into a character.
    char16_t decChar = (local::convertHexDig(*hexDig1) << 4) +
                       local::convertHexDig(*hexDig2);
    outDecStr.Append(decChar);

    // increment 'cur' to after the second hexDig
    cur = ++hexDig2;
  }
}

void
CSP_GetLocalizedStr(const char16_t* aName,
                    const char16_t** aParams,
                    uint32_t aLength,
                    char16_t** outResult)
{
  nsCOMPtr<nsIStringBundle> keyStringBundle;
  nsCOMPtr<nsIStringBundleService> stringBundleService =
    mozilla::services::GetStringBundleService();

  NS_ASSERTION(stringBundleService, "String bundle service must be present!");
  stringBundleService->CreateBundle("chrome://global/locale/security/csp.properties",
                                      getter_AddRefs(keyStringBundle));

  NS_ASSERTION(keyStringBundle, "Key string bundle must be available!");

  if (!keyStringBundle) {
    return;
  }
  keyStringBundle->FormatStringFromName(aName, aParams, aLength, outResult);
}

void
CSP_LogStrMessage(const nsAString& aMsg)
{
  nsCOMPtr<nsIConsoleService> console(do_GetService("@mozilla.org/consoleservice;1"));

  if (!console) {
    return;
  }
  nsString msg = PromiseFlatString(aMsg);
  console->LogStringMessage(msg.get());
}

void
CSP_LogMessage(const nsAString& aMessage,
               const nsAString& aSourceName,
               const nsAString& aSourceLine,
               uint32_t aLineNumber,
               uint32_t aColumnNumber,
               uint32_t aFlags,
               const char *aCategory,
               uint64_t aInnerWindowID)
{
  nsCOMPtr<nsIConsoleService> console(do_GetService(NS_CONSOLESERVICE_CONTRACTID));

  nsCOMPtr<nsIScriptError> error(do_CreateInstance(NS_SCRIPTERROR_CONTRACTID));

  if (!console || !error) {
    return;
  }

  // Prepending CSP to the outgoing console message
  nsString cspMsg;
  cspMsg.Append(NS_LITERAL_STRING("Content Security Policy: "));
  cspMsg.Append(aMessage);

  // Currently 'aSourceLine' is not logged to the console, because similar
  // information is already included within the source link of the message.
  // For inline violations however, the line and column number are 0 and
  // information contained within 'aSourceLine' can be really useful for devs.
  // E.g. 'aSourceLine' might be: 'onclick attribute on DIV element'.
  // In such cases we append 'aSourceLine' directly to the error message.
  if (!aSourceLine.IsEmpty()) {
    cspMsg.Append(NS_LITERAL_STRING(" Source: "));
    cspMsg.Append(aSourceLine);
    cspMsg.Append(NS_LITERAL_STRING("."));
  }

  nsresult rv;
  if (aInnerWindowID > 0) {
    nsCString catStr;
    catStr.AssignASCII(aCategory);
    rv = error->InitWithWindowID(cspMsg, aSourceName,
                                 aSourceLine, aLineNumber,
                                 aColumnNumber, aFlags,
                                 catStr, aInnerWindowID);
  }
  else {
    rv = error->Init(cspMsg, aSourceName,
                     aSourceLine, aLineNumber,
                     aColumnNumber, aFlags,
                     aCategory);
  }
  if (NS_FAILED(rv)) {
    return;
  }
  console->LogMessage(error);
}

/**
 * Combines CSP_LogMessage and CSP_GetLocalizedStr into one call.
 */
void
CSP_LogLocalizedStr(const char16_t* aName,
                    const char16_t** aParams,
                    uint32_t aLength,
                    const nsAString& aSourceName,
                    const nsAString& aSourceLine,
                    uint32_t aLineNumber,
                    uint32_t aColumnNumber,
                    uint32_t aFlags,
                    const char* aCategory,
                    uint64_t aInnerWindowID)
{
  nsXPIDLString logMsg;
  CSP_GetLocalizedStr(aName, aParams, aLength, getter_Copies(logMsg));
  CSP_LogMessage(logMsg, aSourceName, aSourceLine,
                 aLineNumber, aColumnNumber, aFlags,
                 aCategory, aInnerWindowID);
}

/* ===== Helpers ============================ */
CSPDirective
CSP_ContentTypeToDirective(nsContentPolicyType aType)
{
  switch (aType) {
    case nsIContentPolicy::TYPE_IMAGE:
    case nsIContentPolicy::TYPE_IMAGESET:
      return nsIContentSecurityPolicy::IMG_SRC_DIRECTIVE;

    // BLock XSLT as script, see bug 910139
    case nsIContentPolicy::TYPE_XSLT:
    case nsIContentPolicy::TYPE_SCRIPT:
    case nsIContentPolicy::TYPE_INTERNAL_SCRIPT:
    case nsIContentPolicy::TYPE_INTERNAL_SCRIPT_PRELOAD:
      return nsIContentSecurityPolicy::SCRIPT_SRC_DIRECTIVE;

    case nsIContentPolicy::TYPE_STYLESHEET:
      return nsIContentSecurityPolicy::STYLE_SRC_DIRECTIVE;

    case nsIContentPolicy::TYPE_FONT:
      return nsIContentSecurityPolicy::FONT_SRC_DIRECTIVE;

    case nsIContentPolicy::TYPE_MEDIA:
      return nsIContentSecurityPolicy::MEDIA_SRC_DIRECTIVE;

    case nsIContentPolicy::TYPE_WEB_MANIFEST:
      return nsIContentSecurityPolicy::WEB_MANIFEST_SRC_DIRECTIVE;

    case nsIContentPolicy::TYPE_INTERNAL_WORKER:
    case nsIContentPolicy::TYPE_INTERNAL_SHARED_WORKER:
    case nsIContentPolicy::TYPE_INTERNAL_SERVICE_WORKER:
      return nsIContentSecurityPolicy::CHILD_SRC_DIRECTIVE;

    case nsIContentPolicy::TYPE_SUBDOCUMENT:
      return nsIContentSecurityPolicy::FRAME_SRC_DIRECTIVE;

    case nsIContentPolicy::TYPE_WEBSOCKET:
    case nsIContentPolicy::TYPE_XMLHTTPREQUEST:
    case nsIContentPolicy::TYPE_BEACON:
    case nsIContentPolicy::TYPE_PING:
    case nsIContentPolicy::TYPE_FETCH:
      return nsIContentSecurityPolicy::CONNECT_SRC_DIRECTIVE;

    case nsIContentPolicy::TYPE_OBJECT:
    case nsIContentPolicy::TYPE_OBJECT_SUBREQUEST:
      return nsIContentSecurityPolicy::OBJECT_SRC_DIRECTIVE;

    case nsIContentPolicy::TYPE_XBL:
    case nsIContentPolicy::TYPE_DTD:
    case nsIContentPolicy::TYPE_OTHER:
      return nsIContentSecurityPolicy::DEFAULT_SRC_DIRECTIVE;

    // csp shold not block top level loads, e.g. in case
    // of a redirect.
    case nsIContentPolicy::TYPE_DOCUMENT:
    // CSP can not block csp reports
    case nsIContentPolicy::TYPE_CSP_REPORT:
      return nsIContentSecurityPolicy::NO_DIRECTIVE;

    // Fall through to error for all other directives
    default:
      MOZ_ASSERT(false, "Can not map nsContentPolicyType to CSPDirective");
  }
  return nsIContentSecurityPolicy::DEFAULT_SRC_DIRECTIVE;
}

nsCSPHostSrc*
CSP_CreateHostSrcFromURI(nsIURI* aURI)
{
  // Create the host first
  nsCString host;
  aURI->GetAsciiHost(host);
  nsCSPHostSrc *hostsrc = new nsCSPHostSrc(NS_ConvertUTF8toUTF16(host));

  // Add the scheme.
  nsCString scheme;
  aURI->GetScheme(scheme);
  hostsrc->setScheme(NS_ConvertUTF8toUTF16(scheme));

  int32_t port;
  aURI->GetPort(&port);
  // Only add port if it's not default port.
  if (port > 0) {
    nsAutoString portStr;
    portStr.AppendInt(port);
    hostsrc->setPort(portStr);
  }
  return hostsrc;
}

bool
CSP_IsValidDirective(const nsAString& aDir)
{
  uint32_t numDirs = (sizeof(CSPStrDirectives) / sizeof(CSPStrDirectives[0]));

  for (uint32_t i = 0; i < numDirs; i++) {
    if (aDir.LowerCaseEqualsASCII(CSPStrDirectives[i])) {
      return true;
    }
  }
  return false;
}
bool
CSP_IsDirective(const nsAString& aValue, CSPDirective aDir)
{
  return aValue.LowerCaseEqualsASCII(CSP_CSPDirectiveToString(aDir));
}

bool
CSP_IsKeyword(const nsAString& aValue, enum CSPKeyword aKey)
{
  return aValue.LowerCaseEqualsASCII(CSP_EnumToKeyword(aKey));
}

bool
CSP_IsQuotelessKeyword(const nsAString& aKey)
{
  nsString lowerKey = PromiseFlatString(aKey);
  ToLowerCase(lowerKey);

  static_assert(CSP_LAST_KEYWORD_VALUE ==
                (sizeof(CSPStrKeywords) / sizeof(CSPStrKeywords[0])),
                "CSP_LAST_KEYWORD_VALUE does not match length of CSPStrKeywords");

  nsAutoString keyword;
  for (uint32_t i = 0; i < CSP_LAST_KEYWORD_VALUE; i++) {
    // skipping the leading ' and trimming the trailing '
    keyword.AssignASCII(CSPStrKeywords[i] + 1);
    keyword.Trim("'", false, true);
    if (lowerKey.Equals(keyword)) {
      return true;
    }
  }
  return false;
}

/*
 * Checks whether the current directive permits a specific
 * scheme. This function is called from nsCSPSchemeSrc() and
 * also nsCSPHostSrc.
 * @param aEnforcementScheme
 *        The scheme that this directive allows
 * @param aUri
 *        The uri of the subresource load.
 * @param aReportOnly
 *        Whether the enforced policy is report only or not.
 * @param aUpgradeInsecure
 *        Whether the policy makes use of the directive
 *        'upgrade-insecure-requests'.
 */

bool
permitsScheme(const nsAString& aEnforcementScheme,
              nsIURI* aUri,
              bool aReportOnly,
              bool aUpgradeInsecure)
{
  nsAutoCString scheme;
  nsresult rv = aUri->GetScheme(scheme);
  NS_ENSURE_SUCCESS(rv, false);

  // no scheme to enforce, let's allow the load (e.g. script-src *)
  if (aEnforcementScheme.IsEmpty()) {
    return true;
  }

  // if the scheme matches, all good - allow the load
  if (aEnforcementScheme.EqualsASCII(scheme.get())) {
    return true;
  }

  // allow scheme-less sources where the protected resource is http
  // and the load is https, see:
  // http://www.w3.org/TR/CSP2/#match-source-expression
  if (aEnforcementScheme.EqualsASCII("http") &&
      scheme.EqualsASCII("https")) {
    return true;
  }

  // Allow the load when enforcing upgrade-insecure-requests with the
  // promise the request gets upgraded from http to https and ws to wss.
  // See nsHttpChannel::Connect() and also WebSocket.cpp. Please note,
  // the report only policies should not allow the load and report
  // the error back to the page.
  return ((aUpgradeInsecure && !aReportOnly) &&
          ((scheme.EqualsASCII("http") && aEnforcementScheme.EqualsASCII("https")) ||
           (scheme.EqualsASCII("ws") && aEnforcementScheme.EqualsASCII("wss"))));
}

/*
 * A helper function for appending a CSP header to an existing CSP
 * policy.
 *
 * @param aCsp           the CSP policy
 * @param aHeaderValue   the header
 * @param aReportOnly    is this a report-only header?
 */

nsresult
CSP_AppendCSPFromHeader(nsIContentSecurityPolicy* aCsp,
                        const nsAString& aHeaderValue,
                        bool aReportOnly)
{
  NS_ENSURE_ARG(aCsp);

  // Need to tokenize the header value since multiple headers could be
  // concatenated into one comma-separated list of policies.
  // See RFC2616 section 4.2 (last paragraph)
  nsresult rv = NS_OK;
  nsCharSeparatedTokenizer tokenizer(aHeaderValue, ',');
  while (tokenizer.hasMoreTokens()) {
    const nsSubstring& policy = tokenizer.nextToken();
    rv = aCsp->AppendPolicy(policy, aReportOnly, false);
    NS_ENSURE_SUCCESS(rv, rv);
    {
      CSPUTILSLOG(("CSP refined with policy: \"%s\"",
                   NS_ConvertUTF16toUTF8(policy).get()));
    }
  }
  return NS_OK;
}

/* ===== nsCSPSrc ============================ */

nsCSPBaseSrc::nsCSPBaseSrc()
  : mInvalidated(false)
{
}

nsCSPBaseSrc::~nsCSPBaseSrc()
{
}

// ::permits is only called for external load requests, therefore:
// nsCSPKeywordSrc and nsCSPHashSource fall back to this base class
// implementation which will never allow the load.
bool
nsCSPBaseSrc::permits(nsIURI* aUri, const nsAString& aNonce, bool aWasRedirected,
                      bool aReportOnly, bool aUpgradeInsecure, bool aParserCreated) const
{
  if (CSPUTILSLOGENABLED()) {
    CSPUTILSLOG(("nsCSPBaseSrc::permits, aUri: %s",
                 aUri->GetSpecOrDefault().get()));
  }
  return false;
}

// ::allows is only called for inlined loads, therefore:
// nsCSPSchemeSrc, nsCSPHostSrc fall back
// to this base class implementation which will never allow the load.
bool
nsCSPBaseSrc::allows(enum CSPKeyword aKeyword, const nsAString& aHashOrNonce,
                     bool aParserCreated) const
{
  CSPUTILSLOG(("nsCSPBaseSrc::allows, aKeyWord: %s, a HashOrNonce: %s",
              aKeyword == CSP_HASH ? "hash" : CSP_EnumToKeyword(aKeyword),
              NS_ConvertUTF16toUTF8(aHashOrNonce).get()));
  return false;
}

/* ====== nsCSPSchemeSrc ===================== */

nsCSPSchemeSrc::nsCSPSchemeSrc(const nsAString& aScheme)
  : mScheme(aScheme)
{
  ToLowerCase(mScheme);
}

nsCSPSchemeSrc::~nsCSPSchemeSrc()
{
}

bool
nsCSPSchemeSrc::permits(nsIURI* aUri, const nsAString& aNonce, bool aWasRedirected,
                        bool aReportOnly, bool aUpgradeInsecure, bool aParserCreated) const
{
  if (CSPUTILSLOGENABLED()) {
    CSPUTILSLOG(("nsCSPSchemeSrc::permits, aUri: %s",
                 aUri->GetSpecOrDefault().get()));
  }
  MOZ_ASSERT((!mScheme.EqualsASCII("")), "scheme can not be the empty string");
  if (mInvalidated) {
    return false;
  }
  return permitsScheme(mScheme, aUri, aReportOnly, aUpgradeInsecure);
}

bool
nsCSPSchemeSrc::visit(nsCSPSrcVisitor* aVisitor) const
{
  return aVisitor->visitSchemeSrc(*this);
}

void
nsCSPSchemeSrc::toString(nsAString& outStr) const
{
  outStr.Append(mScheme);
  outStr.AppendASCII(":");
}

/* ===== nsCSPHostSrc ======================== */

nsCSPHostSrc::nsCSPHostSrc(const nsAString& aHost)
  : mHost(aHost)
  , mWithinFrameAncstorsDir(false)
{
  ToLowerCase(mHost);
}

nsCSPHostSrc::~nsCSPHostSrc()
{
}

/*
 * Checks whether the current directive permits a specific port.
 * @param aEnforcementScheme
 *        The scheme that this directive allows
 *        (used to query the default port for that scheme)
 * @param aEnforcementPort
 *        The port that this directive allows
 * @param aResourceURI
 *        The uri of the subresource load
 */
bool
permitsPort(const nsAString& aEnforcementScheme,
            const nsAString& aEnforcementPort,
            nsIURI* aResourceURI)
{
  // If enforcement port is the wildcard, don't block the load.
  if (aEnforcementPort.EqualsASCII("*")) {
    return true;
  }

  int32_t resourcePort;
  nsresult rv = aResourceURI->GetPort(&resourcePort);
  NS_ENSURE_SUCCESS(rv, false);

  // Avoid unnecessary string creation/manipulation and don't block the
  // load if the resource to be loaded uses the default port for that
  // scheme and there is no port to be enforced.
  // Note, this optimization relies on scheme checks within permitsScheme().
  if (resourcePort == DEFAULT_PORT && aEnforcementPort.IsEmpty()) {
    return true;
  }

  // By now we know at that either the resourcePort does not use the default
  // port or there is a port restriction to be enforced. A port value of -1
  // corresponds to the protocol's default port (eg. -1 implies port 80 for
  // http URIs), in such a case we have to query the default port of the
  // resource to be loaded.
  if (resourcePort == DEFAULT_PORT) {
    nsAutoCString resourceScheme;
    rv = aResourceURI->GetScheme(resourceScheme);
    NS_ENSURE_SUCCESS(rv, false);
    resourcePort = NS_GetDefaultPort(resourceScheme.get());
  }

  // If there is a port to be enforced and the ports match, then
  // don't block the load.
  nsString resourcePortStr;
  resourcePortStr.AppendInt(resourcePort);
  if (aEnforcementPort.Equals(resourcePortStr)) {
    return true;
  }

  // If there is no port to be enforced, query the default port for the load.
  nsString enforcementPort(aEnforcementPort);
  if (enforcementPort.IsEmpty()) {
    // For scheme less sources, our parser always generates a scheme
    // which is the scheme of the protected resource.
    MOZ_ASSERT(!aEnforcementScheme.IsEmpty(),
               "need a scheme to query default port");
    int32_t defaultEnforcementPort =
      NS_GetDefaultPort(NS_ConvertUTF16toUTF8(aEnforcementScheme).get());
    enforcementPort.Truncate();
    enforcementPort.AppendInt(defaultEnforcementPort);
  }

  // If default ports match, don't block the load
  if (enforcementPort.Equals(resourcePortStr)) {
    return true;
  }

  // Additional port matching where the regular URL matching algorithm
  // treats insecure ports as matching their secure variants.
  // default port for http is  :80
  // default port for https is :443
  if (enforcementPort.EqualsLiteral("80") &&
      resourcePortStr.EqualsLiteral("443")) {
    return true;
  }

  // ports do not match, block the load.
  return false;
}

bool
nsCSPHostSrc::permits(nsIURI* aUri, const nsAString& aNonce, bool aWasRedirected,
                      bool aReportOnly, bool aUpgradeInsecure, bool aParserCreated) const
{
  if (CSPUTILSLOGENABLED()) {
    CSPUTILSLOG(("nsCSPHostSrc::permits, aUri: %s",
                 aUri->GetSpecOrDefault().get()));
  }

  if (mInvalidated) {
    return false;
  }

  // we are following the enforcement rules from the spec, see:
  // http://www.w3.org/TR/CSP11/#match-source-expression

  // 4.3) scheme matching: Check if the scheme matches.
  if (!permitsScheme(mScheme, aUri, aReportOnly, aUpgradeInsecure)) {
    return false;
  }

  // The host in nsCSpHostSrc should never be empty. In case we are enforcing
  // just a specific scheme, the parser should generate a nsCSPSchemeSource.
  NS_ASSERTION((!mHost.IsEmpty()), "host can not be the empty string");

  // 2) host matching: Enforce a single *
  if (mHost.EqualsASCII("*")) {
    // The single ASTERISK character (*) does not match a URI's scheme of a type
    // designating a globally unique identifier (such as blob:, data:, or filesystem:)
    // At the moment firefox does not support filesystem; but for future compatibility
    // we support it in CSP according to the spec, see: 4.2.2 Matching Source Expressions
    // Note, that whitelisting any of these schemes would call nsCSPSchemeSrc::permits().
    bool isBlobScheme =
      (NS_SUCCEEDED(aUri->SchemeIs("blob", &isBlobScheme)) && isBlobScheme);
    bool isDataScheme =
      (NS_SUCCEEDED(aUri->SchemeIs("data", &isDataScheme)) && isDataScheme);
    bool isFileScheme =
      (NS_SUCCEEDED(aUri->SchemeIs("filesystem", &isFileScheme)) && isFileScheme);

    if (isBlobScheme || isDataScheme || isFileScheme) {
      return false;
    }
    return true;
  }

  // Before we can check if the host matches, we have to
  // extract the host part from aUri.
  nsAutoCString uriHost;
  nsresult rv = aUri->GetAsciiHost(uriHost);
  NS_ENSURE_SUCCESS(rv, false);

  nsString decodedUriHost;
  CSP_PercentDecodeStr(NS_ConvertUTF8toUTF16(uriHost), decodedUriHost);

  // 4.5) host matching: Check if the allowed host starts with a wilcard.
  if (mHost.First() == '*') {
    NS_ASSERTION(mHost[1] == '.', "Second character needs to be '.' whenever host starts with '*'");

    // Eliminate leading "*", but keeping the FULL STOP (.) thereafter before checking
    // if the remaining characters match
    nsString wildCardHost = mHost;
    wildCardHost = Substring(wildCardHost, 1, wildCardHost.Length() - 1);
    if (!StringEndsWith(decodedUriHost, wildCardHost)) {
      return false;
    }
  }
  // 4.6) host matching: Check if hosts match.
  else if (!mHost.Equals(decodedUriHost)) {
    return false;
  }

  // Port matching: Check if the ports match.
  if (!permitsPort(mScheme, mPort, aUri)) {
    return false;
  }

  // 4.9) Path matching: If there is a path, we have to enforce
  // path-level matching, unless the channel got redirected, see:
  // http://www.w3.org/TR/CSP11/#source-list-paths-and-redirects
  if (!aWasRedirected && !mPath.IsEmpty()) {
    // converting aUri into nsIURL so we can strip query and ref
    // example.com/test#foo     -> example.com/test
    // example.com/test?val=foo -> example.com/test
    nsCOMPtr<nsIURL> url = do_QueryInterface(aUri);
    if (!url) {
      NS_ASSERTION(false, "can't QI into nsIURI");
      return false;
    }
    nsAutoCString uriPath;
    rv = url->GetFilePath(uriPath);
    NS_ENSURE_SUCCESS(rv, false);

    if (mWithinFrameAncstorsDir) {
      // no path matching for frame-ancestors to not leak any path information.
      return true;
    }

    nsString decodedUriPath;
    CSP_PercentDecodeStr(NS_ConvertUTF8toUTF16(uriPath), decodedUriPath);

    // check if the last character of mPath is '/'; if so
    // we just have to check loading resource is within
    // the allowed path.
    if (mPath.Last() == '/') {
      if (!StringBeginsWith(decodedUriPath, mPath)) {
        return false;
      }
    }
    // otherwise mPath whitelists a specific file, and we have to
    // check if the loading resource matches that whitelisted file.
    else {
      if (!mPath.Equals(decodedUriPath)) {
        return false;
      }
    }
  }

  // At the end: scheme, host, port and path match -> allow the load.
  return true;
}

bool
nsCSPHostSrc::visit(nsCSPSrcVisitor* aVisitor) const
{
  return aVisitor->visitHostSrc(*this);
}

void
nsCSPHostSrc::toString(nsAString& outStr) const
{
  // If mHost is a single "*", we append the wildcard and return.
  if (mHost.EqualsASCII("*") &&
      mScheme.IsEmpty() &&
      mPort.IsEmpty()) {
    outStr.Append(mHost);
    return;
  }

  // append scheme
  outStr.Append(mScheme);

  // append host
  outStr.AppendASCII("://");
  outStr.Append(mHost);

  // append port
  if (!mPort.IsEmpty()) {
    outStr.AppendASCII(":");
    outStr.Append(mPort);
  }

  // append path
  outStr.Append(mPath);
}

void
nsCSPHostSrc::setScheme(const nsAString& aScheme)
{
  mScheme = aScheme;
  ToLowerCase(mScheme);
}

void
nsCSPHostSrc::setPort(const nsAString& aPort)
{
  mPort = aPort;
}

void
nsCSPHostSrc::appendPath(const nsAString& aPath)
{
  mPath.Append(aPath);
}

/* ===== nsCSPKeywordSrc ===================== */

nsCSPKeywordSrc::nsCSPKeywordSrc(enum CSPKeyword aKeyword)
 : mKeyword(aKeyword)
{
  NS_ASSERTION((aKeyword != CSP_SELF),
               "'self' should have been replaced in the parser");
}

nsCSPKeywordSrc::~nsCSPKeywordSrc()
{
}

bool
nsCSPKeywordSrc::permits(nsIURI* aUri, const nsAString& aNonce, bool aWasRedirected,
                         bool aReportOnly, bool aUpgradeInsecure, bool aParserCreated) const
{
  // no need to check for invalidated, this will always return false unless
  // it is an nsCSPKeywordSrc for 'strict-dynamic', which should allow non
  // parser created scripts.
  return ((mKeyword == CSP_STRICT_DYNAMIC) && !aParserCreated);
}

bool
nsCSPKeywordSrc::allows(enum CSPKeyword aKeyword, const nsAString& aHashOrNonce,
                        bool aParserCreated) const
{
  CSPUTILSLOG(("nsCSPKeywordSrc::allows, aKeyWord: %s, aHashOrNonce: %s, mInvalidated: %s",
              CSP_EnumToKeyword(aKeyword),
              CSP_EnumToKeyword(mKeyword),
              NS_ConvertUTF16toUTF8(aHashOrNonce).get(),
              mInvalidated ? "yes" : "false"));

  if (mInvalidated) {
    // only 'self' and 'unsafe-inline' are keywords that can be ignored. Please note that
    // the parser already translates 'self' into a uri (see assertion in constructor).
    MOZ_ASSERT(mKeyword == CSP_UNSAFE_INLINE,
               "should only invalidate unsafe-inline");
    return false;
  }
  // either the keyword allows the load or the policy contains 'strict-dynamic', in which
  // case we have to make sure the script is not parser created before allowing the load.
  return ((mKeyword == aKeyword) ||
          ((mKeyword == CSP_STRICT_DYNAMIC) && !aParserCreated));
}

bool
nsCSPKeywordSrc::visit(nsCSPSrcVisitor* aVisitor) const
{
  return aVisitor->visitKeywordSrc(*this);
}

void
nsCSPKeywordSrc::toString(nsAString& outStr) const
{
  outStr.AppendASCII(CSP_EnumToKeyword(mKeyword));
}

/* ===== nsCSPNonceSrc ==================== */

nsCSPNonceSrc::nsCSPNonceSrc(const nsAString& aNonce)
  : mNonce(aNonce)
{
}

nsCSPNonceSrc::~nsCSPNonceSrc()
{
}

bool
nsCSPNonceSrc::permits(nsIURI* aUri, const nsAString& aNonce, bool aWasRedirected,
                       bool aReportOnly, bool aUpgradeInsecure, bool aParserCreated) const
{
  if (CSPUTILSLOGENABLED()) {
    CSPUTILSLOG(("nsCSPNonceSrc::permits, aUri: %s, aNonce: %s",
                 aUri->GetSpecOrDefault().get(),
                 NS_ConvertUTF16toUTF8(aNonce).get()));
  }

  // nonces can not be invalidated by strict-dynamic
  return mNonce.Equals(aNonce);
}

bool
nsCSPNonceSrc::allows(enum CSPKeyword aKeyword, const nsAString& aHashOrNonce,
                      bool aParserCreated) const
{
  CSPUTILSLOG(("nsCSPNonceSrc::allows, aKeyWord: %s, a HashOrNonce: %s",
              CSP_EnumToKeyword(aKeyword), NS_ConvertUTF16toUTF8(aHashOrNonce).get()));

  if (aKeyword != CSP_NONCE) {
    return false;
  }
  // nonces can not be invalidated by strict-dynamic
  return mNonce.Equals(aHashOrNonce);
}

bool
nsCSPNonceSrc::visit(nsCSPSrcVisitor* aVisitor) const
{
  return aVisitor->visitNonceSrc(*this);
}

void
nsCSPNonceSrc::toString(nsAString& outStr) const
{
  outStr.AppendASCII(CSP_EnumToKeyword(CSP_NONCE));
  outStr.Append(mNonce);
  outStr.AppendASCII("'");
}

/* ===== nsCSPHashSrc ===================== */

nsCSPHashSrc::nsCSPHashSrc(const nsAString& aAlgo, const nsAString& aHash)
 : mAlgorithm(aAlgo)
 , mHash(aHash)
{
  // Only the algo should be rewritten to lowercase, the hash must remain the same.
  ToLowerCase(mAlgorithm);
}

nsCSPHashSrc::~nsCSPHashSrc()
{
}

bool
nsCSPHashSrc::allows(enum CSPKeyword aKeyword, const nsAString& aHashOrNonce,
                     bool aParserCreated) const
{
  CSPUTILSLOG(("nsCSPHashSrc::allows, aKeyWord: %s, a HashOrNonce: %s",
              CSP_EnumToKeyword(aKeyword), NS_ConvertUTF16toUTF8(aHashOrNonce).get()));

  if (aKeyword != CSP_HASH) {
    return false;
  }

  // hashes can not be invalidated by strict-dynamic

  // Convert aHashOrNonce to UTF-8
  NS_ConvertUTF16toUTF8 utf8_hash(aHashOrNonce);

  nsresult rv;
  nsCOMPtr<nsICryptoHash> hasher;
  hasher = do_CreateInstance("@mozilla.org/security/hash;1", &rv);
  NS_ENSURE_SUCCESS(rv, false);

  rv = hasher->InitWithString(NS_ConvertUTF16toUTF8(mAlgorithm));
  NS_ENSURE_SUCCESS(rv, false);

  rv = hasher->Update((uint8_t *)utf8_hash.get(), utf8_hash.Length());
  NS_ENSURE_SUCCESS(rv, false);

  nsAutoCString hash;
  rv = hasher->Finish(true, hash);
  NS_ENSURE_SUCCESS(rv, false);

  // The NSS Base64 encoder automatically adds linebreaks "\r\n" every 64
  // characters. We need to remove these so we can properly validate longer
  // (SHA-512) base64-encoded hashes
  hash.StripChars("\r\n");
  return NS_ConvertUTF16toUTF8(mHash).Equals(hash);
}

bool
nsCSPHashSrc::visit(nsCSPSrcVisitor* aVisitor) const
{
  return aVisitor->visitHashSrc(*this);
}

void
nsCSPHashSrc::toString(nsAString& outStr) const
{
  outStr.AppendASCII("'");
  outStr.Append(mAlgorithm);
  outStr.AppendASCII("-");
  outStr.Append(mHash);
  outStr.AppendASCII("'");
}

/* ===== nsCSPReportURI ===================== */

nsCSPReportURI::nsCSPReportURI(nsIURI *aURI)
  :mReportURI(aURI)
{
}

nsCSPReportURI::~nsCSPReportURI()
{
}

bool
nsCSPReportURI::visit(nsCSPSrcVisitor* aVisitor) const
{
  return false;
}

void
nsCSPReportURI::toString(nsAString& outStr) const
{
  nsAutoCString spec;
  nsresult rv = mReportURI->GetSpec(spec);
  if (NS_FAILED(rv)) {
    return;
  }
  outStr.AppendASCII(spec.get());
}

/* ===== nsCSPSandboxFlags ===================== */

nsCSPSandboxFlags::nsCSPSandboxFlags(const nsAString& aFlags)
  : mFlags(aFlags)
{
  ToLowerCase(mFlags);
}

nsCSPSandboxFlags::~nsCSPSandboxFlags()
{
}

bool
nsCSPSandboxFlags::visit(nsCSPSrcVisitor* aVisitor) const
{
  return false;
}

void
nsCSPSandboxFlags::toString(nsAString& outStr) const
{
  outStr.Append(mFlags);
}

/* ===== nsCSPDirective ====================== */

nsCSPDirective::nsCSPDirective(CSPDirective aDirective)
{
  mDirective = aDirective;
}

nsCSPDirective::~nsCSPDirective()
{
  for (uint32_t i = 0; i < mSrcs.Length(); i++) {
    delete mSrcs[i];
  }
}

bool
nsCSPDirective::permits(nsIURI* aUri, const nsAString& aNonce, bool aWasRedirected,
                        bool aReportOnly, bool aUpgradeInsecure, bool aParserCreated) const
{
  if (CSPUTILSLOGENABLED()) {
    CSPUTILSLOG(("nsCSPDirective::permits, aUri: %s",
                 aUri->GetSpecOrDefault().get()));
  }

  for (uint32_t i = 0; i < mSrcs.Length(); i++) {
    if (mSrcs[i]->permits(aUri, aNonce, aWasRedirected, aReportOnly, aUpgradeInsecure, aParserCreated)) {
      return true;
    }
  }
  return false;
}

bool
nsCSPDirective::allows(enum CSPKeyword aKeyword, const nsAString& aHashOrNonce,
                       bool aParserCreated) const
{
  CSPUTILSLOG(("nsCSPDirective::allows, aKeyWord: %s, a HashOrNonce: %s",
              CSP_EnumToKeyword(aKeyword), NS_ConvertUTF16toUTF8(aHashOrNonce).get()));

  for (uint32_t i = 0; i < mSrcs.Length(); i++) {
    if (mSrcs[i]->allows(aKeyword, aHashOrNonce, aParserCreated)) {
      return true;
    }
  }
  return false;
}

void
nsCSPDirective::toString(nsAString& outStr) const
{
  // Append directive name
  outStr.AppendASCII(CSP_CSPDirectiveToString(mDirective));
  outStr.AppendASCII(" ");

  // Append srcs
  uint32_t length = mSrcs.Length();
  for (uint32_t i = 0; i < length; i++) {
    mSrcs[i]->toString(outStr);
    if (i != (length - 1)) {
      outStr.AppendASCII(" ");
    }
  }
}

void
nsCSPDirective::toDomCSPStruct(mozilla::dom::CSP& outCSP) const
{
  mozilla::dom::Sequence<nsString> srcs;
  nsString src;
  for (uint32_t i = 0; i < mSrcs.Length(); i++) {
    src.Truncate();
    mSrcs[i]->toString(src);
    srcs.AppendElement(src, mozilla::fallible);
  }

  switch(mDirective) {
    case nsIContentSecurityPolicy::DEFAULT_SRC_DIRECTIVE:
      outCSP.mDefault_src.Construct();
      outCSP.mDefault_src.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::SCRIPT_SRC_DIRECTIVE:
      outCSP.mScript_src.Construct();
      outCSP.mScript_src.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::OBJECT_SRC_DIRECTIVE:
      outCSP.mObject_src.Construct();
      outCSP.mObject_src.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::STYLE_SRC_DIRECTIVE:
      outCSP.mStyle_src.Construct();
      outCSP.mStyle_src.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::IMG_SRC_DIRECTIVE:
      outCSP.mImg_src.Construct();
      outCSP.mImg_src.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::MEDIA_SRC_DIRECTIVE:
      outCSP.mMedia_src.Construct();
      outCSP.mMedia_src.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::FRAME_SRC_DIRECTIVE:
      outCSP.mFrame_src.Construct();
      outCSP.mFrame_src.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::FONT_SRC_DIRECTIVE:
      outCSP.mFont_src.Construct();
      outCSP.mFont_src.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::CONNECT_SRC_DIRECTIVE:
      outCSP.mConnect_src.Construct();
      outCSP.mConnect_src.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::REPORT_URI_DIRECTIVE:
      outCSP.mReport_uri.Construct();
      outCSP.mReport_uri.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::FRAME_ANCESTORS_DIRECTIVE:
      outCSP.mFrame_ancestors.Construct();
      outCSP.mFrame_ancestors.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::WEB_MANIFEST_SRC_DIRECTIVE:
      outCSP.mManifest_src.Construct();
      outCSP.mManifest_src.Value() = mozilla::Move(srcs);
      return;
    // not supporting REFLECTED_XSS_DIRECTIVE

    case nsIContentSecurityPolicy::BASE_URI_DIRECTIVE:
      outCSP.mBase_uri.Construct();
      outCSP.mBase_uri.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::FORM_ACTION_DIRECTIVE:
      outCSP.mForm_action.Construct();
      outCSP.mForm_action.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::BLOCK_ALL_MIXED_CONTENT:
      outCSP.mBlock_all_mixed_content.Construct();
      // does not have any srcs
      return;

    case nsIContentSecurityPolicy::UPGRADE_IF_INSECURE_DIRECTIVE:
      outCSP.mUpgrade_insecure_requests.Construct();
      // does not have any srcs
      return;

    case nsIContentSecurityPolicy::CHILD_SRC_DIRECTIVE:
      outCSP.mChild_src.Construct();
      outCSP.mChild_src.Value() = mozilla::Move(srcs);
      return;

    case nsIContentSecurityPolicy::SANDBOX_DIRECTIVE:
      outCSP.mSandbox.Construct();
      outCSP.mSandbox.Value() = mozilla::Move(srcs);
      return;

    // REFERRER_DIRECTIVE and REQUIRE_SRI_FOR are handled in nsCSPPolicy::toDomCSPStruct()

    default:
      NS_ASSERTION(false, "cannot find directive to convert CSP to JSON");
  }
}


bool
nsCSPDirective::restrictsContentType(nsContentPolicyType aContentType) const
{
  // make sure we do not check for the default src before any other sources
  if (isDefaultDirective()) {
    return false;
  }
  return mDirective == CSP_ContentTypeToDirective(aContentType);
}

void
nsCSPDirective::getReportURIs(nsTArray<nsString> &outReportURIs) const
{
  NS_ASSERTION((mDirective == nsIContentSecurityPolicy::REPORT_URI_DIRECTIVE), "not a report-uri directive");

  // append uris
  nsString tmpReportURI;
  for (uint32_t i = 0; i < mSrcs.Length(); i++) {
    tmpReportURI.Truncate();
    mSrcs[i]->toString(tmpReportURI);
    outReportURIs.AppendElement(tmpReportURI);
  }
}

bool
nsCSPDirective::visitSrcs(nsCSPSrcVisitor* aVisitor) const
{
  for (uint32_t i = 0; i < mSrcs.Length(); i++) {
    if (!mSrcs[i]->visit(aVisitor)) {
      return false;
    }
  }
  return true;
}

bool nsCSPDirective::equals(CSPDirective aDirective) const
{
  return (mDirective == aDirective);
}

/* =============== nsCSPChildSrcDirective ============= */

nsCSPChildSrcDirective::nsCSPChildSrcDirective(CSPDirective aDirective)
  : nsCSPDirective(aDirective)
  , mHandleFrameSrc(false)
{
}

nsCSPChildSrcDirective::~nsCSPChildSrcDirective()
{
}

void nsCSPChildSrcDirective::setHandleFrameSrc()
{
  mHandleFrameSrc = true;
}

bool nsCSPChildSrcDirective::restrictsContentType(nsContentPolicyType aContentType) const
{
  if (aContentType == nsIContentPolicy::TYPE_SUBDOCUMENT) {
    return mHandleFrameSrc;
  }

  return (aContentType == nsIContentPolicy::TYPE_INTERNAL_WORKER
      || aContentType == nsIContentPolicy::TYPE_INTERNAL_SHARED_WORKER
      || aContentType == nsIContentPolicy::TYPE_INTERNAL_SERVICE_WORKER
      );
}

bool nsCSPChildSrcDirective::equals(CSPDirective aDirective) const
{
  if (aDirective == nsIContentSecurityPolicy::FRAME_SRC_DIRECTIVE) {
    return mHandleFrameSrc;
  }

  return (aDirective == nsIContentSecurityPolicy::CHILD_SRC_DIRECTIVE);
}

/* =============== nsBlockAllMixedContentDirective ============= */

nsBlockAllMixedContentDirective::nsBlockAllMixedContentDirective(CSPDirective aDirective)
: nsCSPDirective(aDirective)
{
}

nsBlockAllMixedContentDirective::~nsBlockAllMixedContentDirective()
{
}

void
nsBlockAllMixedContentDirective::toString(nsAString& outStr) const
{
  outStr.AppendASCII(CSP_CSPDirectiveToString(
    nsIContentSecurityPolicy::BLOCK_ALL_MIXED_CONTENT));
}

/* =============== nsUpgradeInsecureDirective ============= */

nsUpgradeInsecureDirective::nsUpgradeInsecureDirective(CSPDirective aDirective)
: nsCSPDirective(aDirective)
{
}

nsUpgradeInsecureDirective::~nsUpgradeInsecureDirective()
{
}

void
nsUpgradeInsecureDirective::toString(nsAString& outStr) const
{
  outStr.AppendASCII(CSP_CSPDirectiveToString(
    nsIContentSecurityPolicy::UPGRADE_IF_INSECURE_DIRECTIVE));
}

/* ===== nsRequireSRIForDirective ========================= */

nsRequireSRIForDirective::nsRequireSRIForDirective(CSPDirective aDirective)
: nsCSPDirective(aDirective)
{
}

nsRequireSRIForDirective::~nsRequireSRIForDirective()
{
}

void
nsRequireSRIForDirective::toString(nsAString &outStr) const
{
  outStr.AppendASCII(CSP_CSPDirectiveToString(
    nsIContentSecurityPolicy::REQUIRE_SRI_FOR));
  for (uint32_t i = 0; i < mTypes.Length(); i++) {
    if (mTypes[i] == nsIContentPolicy::TYPE_SCRIPT) {
      outStr.AppendASCII(" script");
    }
    else if (mTypes[i] == nsIContentPolicy::TYPE_STYLESHEET) {
      outStr.AppendASCII(" style");
    }
  }
}

bool
nsRequireSRIForDirective::hasType(nsContentPolicyType aType) const
{
  for (uint32_t i = 0; i < mTypes.Length(); i++) {
    if (mTypes[i] == aType) {
      return true;
    }
  }
  return false;
}

bool
nsRequireSRIForDirective::restrictsContentType(const nsContentPolicyType aType) const
{
  return this->hasType(aType);
}

bool
nsRequireSRIForDirective::allows(enum CSPKeyword aKeyword, const nsAString& aHashOrNonce,
                                 bool aParserCreated) const
{
  // can only disallow CSP_REQUIRE_SRI_FOR.
  return (aKeyword != CSP_REQUIRE_SRI_FOR);
}

/* ===== nsCSPPolicy ========================= */

nsCSPPolicy::nsCSPPolicy()
  : mUpgradeInsecDir(nullptr)
  , mReportOnly(false)
{
  CSPUTILSLOG(("nsCSPPolicy::nsCSPPolicy"));
}

nsCSPPolicy::~nsCSPPolicy()
{
  CSPUTILSLOG(("nsCSPPolicy::~nsCSPPolicy"));

  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
    delete mDirectives[i];
  }
}

bool
nsCSPPolicy::permits(CSPDirective aDir,
                     nsIURI* aUri,
                     bool aSpecific) const
{
  nsString outp;
  return this->permits(aDir, aUri, EmptyString(), false, aSpecific, false, outp);
}

bool
nsCSPPolicy::permits(CSPDirective aDir,
                     nsIURI* aUri,
                     const nsAString& aNonce,
                     bool aWasRedirected,
                     bool aSpecific,
                     bool aParserCreated,
                     nsAString& outViolatedDirective) const
{
  if (CSPUTILSLOGENABLED()) {
    CSPUTILSLOG(("nsCSPPolicy::permits, aUri: %s, aDir: %d, aSpecific: %s",
                 aUri->GetSpecOrDefault().get(), aDir,
                 aSpecific ? "true" : "false"));
  }

  NS_ASSERTION(aUri, "permits needs an uri to perform the check!");
  outViolatedDirective.Truncate();

  nsCSPDirective* defaultDir = nullptr;

  // Try to find a relevant directive
  // These directive arrays are short (1-5 elements), not worth using a hashtable.
  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
    if (mDirectives[i]->equals(aDir)) {
      if (!mDirectives[i]->permits(aUri, aNonce, aWasRedirected, mReportOnly,
                                   mUpgradeInsecDir, aParserCreated)) {
        mDirectives[i]->toString(outViolatedDirective);
        return false;
      }
      return true;
    }
    if (mDirectives[i]->isDefaultDirective()) {
      defaultDir = mDirectives[i];
    }
  }

  // If the above loop runs through, we haven't found a matching directive.
  // Avoid relooping, just store the result of default-src while looping.
  if (!aSpecific && defaultDir) {
    if (!defaultDir->permits(aUri, aNonce, aWasRedirected, mReportOnly,
                             mUpgradeInsecDir, aParserCreated)) {
      defaultDir->toString(outViolatedDirective);
      return false;
    }
    return true;
  }

  // Nothing restricts this, so we're allowing the load
  // See bug 764937
  return true;
}

bool
nsCSPPolicy::allows(nsContentPolicyType aContentType,
                    enum CSPKeyword aKeyword,
                    const nsAString& aHashOrNonce,
                    bool aParserCreated) const
{
  CSPUTILSLOG(("nsCSPPolicy::allows, aKeyWord: %s, a HashOrNonce: %s",
              CSP_EnumToKeyword(aKeyword), NS_ConvertUTF16toUTF8(aHashOrNonce).get()));

  nsCSPDirective* defaultDir = nullptr;

  // Try to find a matching directive
  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
    if (mDirectives[i]->restrictsContentType(aContentType)) {
      if (mDirectives[i]->allows(aKeyword, aHashOrNonce, aParserCreated)) {
        return true;
      }
      return false;
    }
    if (mDirectives[i]->isDefaultDirective()) {
      defaultDir = mDirectives[i];
    }
  }

  // {nonce,hash}-source should not consult default-src:
  //   * return false if default-src is specified
  //   * but allow the load if default-src is *not* specified (Bug 1198422)
  if (aKeyword == CSP_NONCE || aKeyword == CSP_HASH) {
     if (!defaultDir) {
       return true;
     }
    return false;
  }

  // If the above loop runs through, we haven't found a matching directive.
  // Avoid relooping, just store the result of default-src while looping.
  if (defaultDir) {
    return defaultDir->allows(aKeyword, aHashOrNonce, aParserCreated);
  }

  // Allowing the load; see Bug 885433
  // a) inline scripts (also unsafe eval) should only be blocked
  //    if there is a [script-src] or [default-src]
  // b) inline styles should only be blocked
  //    if there is a [style-src] or [default-src]
  return true;
}

bool
nsCSPPolicy::allows(nsContentPolicyType aContentType,
                    enum CSPKeyword aKeyword) const
{
  return allows(aContentType, aKeyword, NS_LITERAL_STRING(""), false);
}

void
nsCSPPolicy::toString(nsAString& outStr) const
{
  uint32_t length = mDirectives.Length();
  for (uint32_t i = 0; i < length; ++i) {

    if (mDirectives[i]->equals(nsIContentSecurityPolicy::REFERRER_DIRECTIVE)) {
      outStr.AppendASCII(CSP_CSPDirectiveToString(nsIContentSecurityPolicy::REFERRER_DIRECTIVE));
      outStr.AppendASCII(" ");
      outStr.Append(mReferrerPolicy);
    } else {
      mDirectives[i]->toString(outStr);
    }
    if (i != (length - 1)) {
      outStr.AppendASCII("; ");
    }
  }
}

void
nsCSPPolicy::toDomCSPStruct(mozilla::dom::CSP& outCSP) const
{
  outCSP.mReport_only = mReportOnly;

  for (uint32_t i = 0; i < mDirectives.Length(); ++i) {
    if (mDirectives[i]->equals(nsIContentSecurityPolicy::REFERRER_DIRECTIVE)) {
      mozilla::dom::Sequence<nsString> srcs;
      srcs.AppendElement(mReferrerPolicy, mozilla::fallible);
      outCSP.mReferrer.Construct();
      outCSP.mReferrer.Value() = srcs;
    } else {
      mDirectives[i]->toDomCSPStruct(outCSP);
    }
  }
}

bool
nsCSPPolicy::hasDirective(CSPDirective aDir) const
{
  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
    if (mDirectives[i]->equals(aDir)) {
      return true;
    }
  }
  return false;
}

/*
 * Use this function only after ::allows() returned 'false'. Most and
 * foremost it's used to get the violated directive before sending reports.
 * The parameter outDirective is the equivalent of 'outViolatedDirective'
 * for the ::permits() function family.
 */
void
nsCSPPolicy::getDirectiveStringForContentType(nsContentPolicyType aContentType,
                                              nsAString& outDirective) const
{
  nsCSPDirective* defaultDir = nullptr;
  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
    if (mDirectives[i]->restrictsContentType(aContentType)) {
      mDirectives[i]->toString(outDirective);
      return;
    }
    if (mDirectives[i]->isDefaultDirective()) {
      defaultDir = mDirectives[i];
    }
  }
  // if we haven't found a matching directive yet,
  // the contentType must be restricted by the default directive
  if (defaultDir) {
    defaultDir->toString(outDirective);
    return;
  }
  NS_ASSERTION(false, "Can not query directive string for contentType!");
  outDirective.AppendASCII("couldNotQueryViolatedDirective");
}

void
nsCSPPolicy::getDirectiveAsString(CSPDirective aDir, nsAString& outDirective) const
{
  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
    if (mDirectives[i]->equals(aDir)) {
      mDirectives[i]->toString(outDirective);
      return;
    }
  }
}

/*
 * Helper function that returns the underlying bit representation of sandbox
 * flags. The function returns SANDBOXED_NONE if there are no sandbox
 * directives.
 */
uint32_t
nsCSPPolicy::getSandboxFlags() const
{
  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
    if (mDirectives[i]->equals(nsIContentSecurityPolicy::SANDBOX_DIRECTIVE)) {
      nsAutoString flags;
      mDirectives[i]->toString(flags);

      if (flags.IsEmpty()) {
        return SANDBOX_ALL_FLAGS;
      }

      nsAttrValue attr;
      attr.ParseAtomArray(flags);

      return nsContentUtils::ParseSandboxAttributeToFlags(&attr);
    }
  }

  return SANDBOXED_NONE;
}

void
nsCSPPolicy::getReportURIs(nsTArray<nsString>& outReportURIs) const
{
  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
    if (mDirectives[i]->equals(nsIContentSecurityPolicy::REPORT_URI_DIRECTIVE)) {
      mDirectives[i]->getReportURIs(outReportURIs);
      return;
    }
  }
}

bool
nsCSPPolicy::visitDirectiveSrcs(CSPDirective aDir, nsCSPSrcVisitor* aVisitor) const
{
  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
    if (mDirectives[i]->equals(aDir)) {
      return mDirectives[i]->visitSrcs(aVisitor);
    }
  }
  return false;
}

bool
nsCSPPolicy::requireSRIForType(nsContentPolicyType aContentType)
{
  for (uint32_t i = 0; i < mDirectives.Length(); i++) {
    if (mDirectives[i]->equals(nsIContentSecurityPolicy::REQUIRE_SRI_FOR)) {
      return static_cast<nsRequireSRIForDirective*>(mDirectives[i])->hasType(aContentType);
    }
  }
  return false;
}