-
-
Notifications
You must be signed in to change notification settings - Fork 748
/
Copy pathpurify.cjs.js
1340 lines (1332 loc) · 60.6 KB
/
purify.cjs.js
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
/*! @license DOMPurify 3.2.3 | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/3.2.3/LICENSE */
'use strict';
const {
entries,
setPrototypeOf,
isFrozen,
getPrototypeOf,
getOwnPropertyDescriptor
} = Object;
let {
freeze,
seal,
create
} = Object; // eslint-disable-line import/no-mutable-exports
let {
apply,
construct
} = typeof Reflect !== 'undefined' && Reflect;
if (!freeze) {
freeze = function freeze(x) {
return x;
};
}
if (!seal) {
seal = function seal(x) {
return x;
};
}
if (!apply) {
apply = function apply(fun, thisValue, args) {
return fun.apply(thisValue, args);
};
}
if (!construct) {
construct = function construct(Func, args) {
return new Func(...args);
};
}
const arrayForEach = unapply(Array.prototype.forEach);
const arrayLastIndexOf = unapply(Array.prototype.lastIndexOf);
const arrayPop = unapply(Array.prototype.pop);
const arrayPush = unapply(Array.prototype.push);
const arraySplice = unapply(Array.prototype.splice);
const stringToLowerCase = unapply(String.prototype.toLowerCase);
const stringToString = unapply(String.prototype.toString);
const stringMatch = unapply(String.prototype.match);
const stringReplace = unapply(String.prototype.replace);
const stringIndexOf = unapply(String.prototype.indexOf);
const stringTrim = unapply(String.prototype.trim);
const objectHasOwnProperty = unapply(Object.prototype.hasOwnProperty);
const regExpTest = unapply(RegExp.prototype.test);
const typeErrorCreate = unconstruct(TypeError);
/**
* Creates a new function that calls the given function with a specified thisArg and arguments.
*
* @param func - The function to be wrapped and called.
* @returns A new function that calls the given function with a specified thisArg and arguments.
*/
function unapply(func) {
return function (thisArg) {
for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
args[_key - 1] = arguments[_key];
}
return apply(func, thisArg, args);
};
}
/**
* Creates a new function that constructs an instance of the given constructor function with the provided arguments.
*
* @param func - The constructor function to be wrapped and called.
* @returns A new function that constructs an instance of the given constructor function with the provided arguments.
*/
function unconstruct(func) {
return function () {
for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
args[_key2] = arguments[_key2];
}
return construct(func, args);
};
}
/**
* Add properties to a lookup table
*
* @param set - The set to which elements will be added.
* @param array - The array containing elements to be added to the set.
* @param transformCaseFunc - An optional function to transform the case of each element before adding to the set.
* @returns The modified set with added elements.
*/
function addToSet(set, array) {
let transformCaseFunc = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : stringToLowerCase;
if (setPrototypeOf) {
// Make 'in' and truthy checks like Boolean(set.constructor)
// independent of any properties defined on Object.prototype.
// Prevent prototype setters from intercepting set as a this value.
setPrototypeOf(set, null);
}
let l = array.length;
while (l--) {
let element = array[l];
if (typeof element === 'string') {
const lcElement = transformCaseFunc(element);
if (lcElement !== element) {
// Config presets (e.g. tags.js, attrs.js) are immutable.
if (!isFrozen(array)) {
array[l] = lcElement;
}
element = lcElement;
}
}
set[element] = true;
}
return set;
}
/**
* Clean up an array to harden against CSPP
*
* @param array - The array to be cleaned.
* @returns The cleaned version of the array
*/
function cleanArray(array) {
for (let index = 0; index < array.length; index++) {
const isPropertyExist = objectHasOwnProperty(array, index);
if (!isPropertyExist) {
array[index] = null;
}
}
return array;
}
/**
* Shallow clone an object
*
* @param object - The object to be cloned.
* @returns A new object that copies the original.
*/
function clone(object) {
const newObject = create(null);
for (const [property, value] of entries(object)) {
const isPropertyExist = objectHasOwnProperty(object, property);
if (isPropertyExist) {
if (Array.isArray(value)) {
newObject[property] = cleanArray(value);
} else if (value && typeof value === 'object' && value.constructor === Object) {
newObject[property] = clone(value);
} else {
newObject[property] = value;
}
}
}
return newObject;
}
/**
* This method automatically checks if the prop is function or getter and behaves accordingly.
*
* @param object - The object to look up the getter function in its prototype chain.
* @param prop - The property name for which to find the getter function.
* @returns The getter function found in the prototype chain or a fallback function.
*/
function lookupGetter(object, prop) {
while (object !== null) {
const desc = getOwnPropertyDescriptor(object, prop);
if (desc) {
if (desc.get) {
return unapply(desc.get);
}
if (typeof desc.value === 'function') {
return unapply(desc.value);
}
}
object = getPrototypeOf(object);
}
function fallbackValue() {
return null;
}
return fallbackValue;
}
const html$1 = freeze(['a', 'abbr', 'acronym', 'address', 'area', 'article', 'aside', 'audio', 'b', 'bdi', 'bdo', 'big', 'blink', 'blockquote', 'body', 'br', 'button', 'canvas', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'content', 'data', 'datalist', 'dd', 'decorator', 'del', 'details', 'dfn', 'dialog', 'dir', 'div', 'dl', 'dt', 'element', 'em', 'fieldset', 'figcaption', 'figure', 'font', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'i', 'img', 'input', 'ins', 'kbd', 'label', 'legend', 'li', 'main', 'map', 'mark', 'marquee', 'menu', 'menuitem', 'meter', 'nav', 'nobr', 'ol', 'optgroup', 'option', 'output', 'p', 'picture', 'pre', 'progress', 'q', 'rp', 'rt', 'ruby', 's', 'samp', 'section', 'select', 'shadow', 'small', 'source', 'spacer', 'span', 'strike', 'strong', 'style', 'sub', 'summary', 'sup', 'table', 'tbody', 'td', 'template', 'textarea', 'tfoot', 'th', 'thead', 'time', 'tr', 'track', 'tt', 'u', 'ul', 'var', 'video', 'wbr']);
const svg$1 = freeze(['svg', 'a', 'altglyph', 'altglyphdef', 'altglyphitem', 'animatecolor', 'animatemotion', 'animatetransform', 'circle', 'clippath', 'defs', 'desc', 'ellipse', 'filter', 'font', 'g', 'glyph', 'glyphref', 'hkern', 'image', 'line', 'lineargradient', 'marker', 'mask', 'metadata', 'mpath', 'path', 'pattern', 'polygon', 'polyline', 'radialgradient', 'rect', 'stop', 'style', 'switch', 'symbol', 'text', 'textpath', 'title', 'tref', 'tspan', 'view', 'vkern']);
const svgFilters = freeze(['feBlend', 'feColorMatrix', 'feComponentTransfer', 'feComposite', 'feConvolveMatrix', 'feDiffuseLighting', 'feDisplacementMap', 'feDistantLight', 'feDropShadow', 'feFlood', 'feFuncA', 'feFuncB', 'feFuncG', 'feFuncR', 'feGaussianBlur', 'feImage', 'feMerge', 'feMergeNode', 'feMorphology', 'feOffset', 'fePointLight', 'feSpecularLighting', 'feSpotLight', 'feTile', 'feTurbulence']);
// List of SVG elements that are disallowed by default.
// We still need to know them so that we can do namespace
// checks properly in case one wants to add them to
// allow-list.
const svgDisallowed = freeze(['animate', 'color-profile', 'cursor', 'discard', 'font-face', 'font-face-format', 'font-face-name', 'font-face-src', 'font-face-uri', 'foreignobject', 'hatch', 'hatchpath', 'mesh', 'meshgradient', 'meshpatch', 'meshrow', 'missing-glyph', 'script', 'set', 'solidcolor', 'unknown', 'use']);
const mathMl$1 = freeze(['math', 'menclose', 'merror', 'mfenced', 'mfrac', 'mglyph', 'mi', 'mlabeledtr', 'mmultiscripts', 'mn', 'mo', 'mover', 'mpadded', 'mphantom', 'mroot', 'mrow', 'ms', 'mspace', 'msqrt', 'mstyle', 'msub', 'msup', 'msubsup', 'mtable', 'mtd', 'mtext', 'mtr', 'munder', 'munderover', 'mprescripts']);
// Similarly to SVG, we want to know all MathML elements,
// even those that we disallow by default.
const mathMlDisallowed = freeze(['maction', 'maligngroup', 'malignmark', 'mlongdiv', 'mscarries', 'mscarry', 'msgroup', 'mstack', 'msline', 'msrow', 'semantics', 'annotation', 'annotation-xml', 'mprescripts', 'none']);
const text = freeze(['#text']);
const html = freeze(['accept', 'action', 'align', 'alt', 'autocapitalize', 'autocomplete', 'autopictureinpicture', 'autoplay', 'background', 'bgcolor', 'border', 'capture', 'cellpadding', 'cellspacing', 'checked', 'cite', 'class', 'clear', 'color', 'cols', 'colspan', 'controls', 'controlslist', 'coords', 'crossorigin', 'datetime', 'decoding', 'default', 'dir', 'disabled', 'disablepictureinpicture', 'disableremoteplayback', 'download', 'draggable', 'enctype', 'enterkeyhint', 'face', 'for', 'headers', 'height', 'hidden', 'high', 'href', 'hreflang', 'id', 'inputmode', 'integrity', 'ismap', 'kind', 'label', 'lang', 'list', 'loading', 'loop', 'low', 'max', 'maxlength', 'media', 'method', 'min', 'minlength', 'multiple', 'muted', 'name', 'nonce', 'noshade', 'novalidate', 'nowrap', 'open', 'optimum', 'pattern', 'placeholder', 'playsinline', 'popover', 'popovertarget', 'popovertargetaction', 'poster', 'preload', 'pubdate', 'radiogroup', 'readonly', 'rel', 'required', 'rev', 'reversed', 'role', 'rows', 'rowspan', 'spellcheck', 'scope', 'selected', 'shape', 'size', 'sizes', 'span', 'srclang', 'start', 'src', 'srcset', 'step', 'style', 'summary', 'tabindex', 'title', 'translate', 'type', 'usemap', 'valign', 'value', 'width', 'wrap', 'xmlns', 'slot']);
const svg = freeze(['accent-height', 'accumulate', 'additive', 'alignment-baseline', 'amplitude', 'ascent', 'attributename', 'attributetype', 'azimuth', 'basefrequency', 'baseline-shift', 'begin', 'bias', 'by', 'class', 'clip', 'clippathunits', 'clip-path', 'clip-rule', 'color', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'cx', 'cy', 'd', 'dx', 'dy', 'diffuseconstant', 'direction', 'display', 'divisor', 'dur', 'edgemode', 'elevation', 'end', 'exponent', 'fill', 'fill-opacity', 'fill-rule', 'filter', 'filterunits', 'flood-color', 'flood-opacity', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'fx', 'fy', 'g1', 'g2', 'glyph-name', 'glyphref', 'gradientunits', 'gradienttransform', 'height', 'href', 'id', 'image-rendering', 'in', 'in2', 'intercept', 'k', 'k1', 'k2', 'k3', 'k4', 'kerning', 'keypoints', 'keysplines', 'keytimes', 'lang', 'lengthadjust', 'letter-spacing', 'kernelmatrix', 'kernelunitlength', 'lighting-color', 'local', 'marker-end', 'marker-mid', 'marker-start', 'markerheight', 'markerunits', 'markerwidth', 'maskcontentunits', 'maskunits', 'max', 'mask', 'media', 'method', 'mode', 'min', 'name', 'numoctaves', 'offset', 'operator', 'opacity', 'order', 'orient', 'orientation', 'origin', 'overflow', 'paint-order', 'path', 'pathlength', 'patterncontentunits', 'patterntransform', 'patternunits', 'points', 'preservealpha', 'preserveaspectratio', 'primitiveunits', 'r', 'rx', 'ry', 'radius', 'refx', 'refy', 'repeatcount', 'repeatdur', 'restart', 'result', 'rotate', 'scale', 'seed', 'shape-rendering', 'slope', 'specularconstant', 'specularexponent', 'spreadmethod', 'startoffset', 'stddeviation', 'stitchtiles', 'stop-color', 'stop-opacity', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke', 'stroke-width', 'style', 'surfacescale', 'systemlanguage', 'tabindex', 'tablevalues', 'targetx', 'targety', 'transform', 'transform-origin', 'text-anchor', 'text-decoration', 'text-rendering', 'textlength', 'type', 'u1', 'u2', 'unicode', 'values', 'viewbox', 'visibility', 'version', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'width', 'word-spacing', 'wrap', 'writing-mode', 'xchannelselector', 'ychannelselector', 'x', 'x1', 'x2', 'xmlns', 'y', 'y1', 'y2', 'z', 'zoomandpan']);
const mathMl = freeze(['accent', 'accentunder', 'align', 'bevelled', 'close', 'columnsalign', 'columnlines', 'columnspan', 'denomalign', 'depth', 'dir', 'display', 'displaystyle', 'encoding', 'fence', 'frame', 'height', 'href', 'id', 'largeop', 'length', 'linethickness', 'lspace', 'lquote', 'mathbackground', 'mathcolor', 'mathsize', 'mathvariant', 'maxsize', 'minsize', 'movablelimits', 'notation', 'numalign', 'open', 'rowalign', 'rowlines', 'rowspacing', 'rowspan', 'rspace', 'rquote', 'scriptlevel', 'scriptminsize', 'scriptsizemultiplier', 'selection', 'separator', 'separators', 'stretchy', 'subscriptshift', 'supscriptshift', 'symmetric', 'voffset', 'width', 'xmlns']);
const xml = freeze(['xlink:href', 'xml:id', 'xlink:title', 'xml:space', 'xmlns:xlink']);
// eslint-disable-next-line unicorn/better-regex
const MUSTACHE_EXPR = seal(/\{\{[\w\W]*|[\w\W]*\}\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode
const ERB_EXPR = seal(/<%[\w\W]*|[\w\W]*%>/gm);
const TMPLIT_EXPR = seal(/\$\{[\w\W]*}/gm); // eslint-disable-line unicorn/better-regex
const DATA_ATTR = seal(/^data-[\-\w.\u00B7-\uFFFF]+$/); // eslint-disable-line no-useless-escape
const ARIA_ATTR = seal(/^aria-[\-\w]+$/); // eslint-disable-line no-useless-escape
const IS_ALLOWED_URI = seal(/^(?:(?:(?:f|ht)tps?|mailto|tel|callto|sms|cid|xmpp):|[^a-z]|[a-z+.\-]+(?:[^a-z+.\-:]|$))/i // eslint-disable-line no-useless-escape
);
const IS_SCRIPT_OR_DATA = seal(/^(?:\w+script|data):/i);
const ATTR_WHITESPACE = seal(/[\u0000-\u0020\u00A0\u1680\u180E\u2000-\u2029\u205F\u3000]/g // eslint-disable-line no-control-regex
);
const DOCTYPE_NAME = seal(/^html$/i);
const CUSTOM_ELEMENT = seal(/^[a-z][.\w]*(-[.\w]+)+$/i);
var EXPRESSIONS = /*#__PURE__*/Object.freeze({
__proto__: null,
ARIA_ATTR: ARIA_ATTR,
ATTR_WHITESPACE: ATTR_WHITESPACE,
CUSTOM_ELEMENT: CUSTOM_ELEMENT,
DATA_ATTR: DATA_ATTR,
DOCTYPE_NAME: DOCTYPE_NAME,
ERB_EXPR: ERB_EXPR,
IS_ALLOWED_URI: IS_ALLOWED_URI,
IS_SCRIPT_OR_DATA: IS_SCRIPT_OR_DATA,
MUSTACHE_EXPR: MUSTACHE_EXPR,
TMPLIT_EXPR: TMPLIT_EXPR
});
/* eslint-disable @typescript-eslint/indent */
// https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType
const NODE_TYPE = {
element: 1,
attribute: 2,
text: 3,
cdataSection: 4,
entityReference: 5,
// Deprecated
entityNode: 6,
// Deprecated
progressingInstruction: 7,
comment: 8,
document: 9,
documentType: 10,
documentFragment: 11,
notation: 12 // Deprecated
};
const getGlobal = function getGlobal() {
return typeof window === 'undefined' ? null : window;
};
/**
* Creates a no-op policy for internal use only.
* Don't export this function outside this module!
* @param trustedTypes The policy factory.
* @param purifyHostElement The Script element used to load DOMPurify (to determine policy name suffix).
* @return The policy created (or null, if Trusted Types
* are not supported or creating the policy failed).
*/
const _createTrustedTypesPolicy = function _createTrustedTypesPolicy(trustedTypes, purifyHostElement) {
if (typeof trustedTypes !== 'object' || typeof trustedTypes.createPolicy !== 'function') {
return null;
}
// Allow the callers to control the unique policy name
// by adding a data-tt-policy-suffix to the script element with the DOMPurify.
// Policy creation with duplicate names throws in Trusted Types.
let suffix = null;
const ATTR_NAME = 'data-tt-policy-suffix';
if (purifyHostElement && purifyHostElement.hasAttribute(ATTR_NAME)) {
suffix = purifyHostElement.getAttribute(ATTR_NAME);
}
const policyName = 'dompurify' + (suffix ? '#' + suffix : '');
try {
return trustedTypes.createPolicy(policyName, {
createHTML(html) {
return html;
},
createScriptURL(scriptUrl) {
return scriptUrl;
}
});
} catch (_) {
// Policy creation failed (most likely another DOMPurify script has
// already run). Skip creating the policy, as this will only cause errors
// if TT are enforced.
console.warn('TrustedTypes policy ' + policyName + ' could not be created.');
return null;
}
};
const _createHooksMap = function _createHooksMap() {
return {
afterSanitizeAttributes: [],
afterSanitizeElements: [],
afterSanitizeShadowDOM: [],
beforeSanitizeAttributes: [],
beforeSanitizeElements: [],
beforeSanitizeShadowDOM: [],
uponSanitizeAttribute: [],
uponSanitizeElement: [],
uponSanitizeShadowNode: []
};
};
function createDOMPurify() {
let window = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : getGlobal();
const DOMPurify = root => createDOMPurify(root);
DOMPurify.version = '3.2.3';
DOMPurify.removed = [];
if (!window || !window.document || window.document.nodeType !== NODE_TYPE.document) {
// Not running in a browser, provide a factory function
// so that you can pass your own Window
DOMPurify.isSupported = false;
return DOMPurify;
}
let {
document
} = window;
const originalDocument = document;
const currentScript = originalDocument.currentScript;
const {
DocumentFragment,
HTMLTemplateElement,
Node,
Element,
NodeFilter,
NamedNodeMap = window.NamedNodeMap || window.MozNamedAttrMap,
HTMLFormElement,
DOMParser,
trustedTypes
} = window;
const ElementPrototype = Element.prototype;
const cloneNode = lookupGetter(ElementPrototype, 'cloneNode');
const remove = lookupGetter(ElementPrototype, 'remove');
const getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');
const getChildNodes = lookupGetter(ElementPrototype, 'childNodes');
const getParentNode = lookupGetter(ElementPrototype, 'parentNode');
// As per issue #47, the web-components registry is inherited by a
// new document created via createHTMLDocument. As per the spec
// (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)
// a new empty registry is used when creating a template contents owner
// document, so we use that as our parent document to ensure nothing
// is inherited.
if (typeof HTMLTemplateElement === 'function') {
const template = document.createElement('template');
if (template.content && template.content.ownerDocument) {
document = template.content.ownerDocument;
}
}
let trustedTypesPolicy;
let emptyHTML = '';
const {
implementation,
createNodeIterator,
createDocumentFragment,
getElementsByTagName
} = document;
const {
importNode
} = originalDocument;
let hooks = _createHooksMap();
/**
* Expose whether this browser supports running the full DOMPurify.
*/
DOMPurify.isSupported = typeof entries === 'function' && typeof getParentNode === 'function' && implementation && implementation.createHTMLDocument !== undefined;
const {
MUSTACHE_EXPR,
ERB_EXPR,
TMPLIT_EXPR,
DATA_ATTR,
ARIA_ATTR,
IS_SCRIPT_OR_DATA,
ATTR_WHITESPACE,
CUSTOM_ELEMENT
} = EXPRESSIONS;
let {
IS_ALLOWED_URI: IS_ALLOWED_URI$1
} = EXPRESSIONS;
/**
* We consider the elements and attributes below to be safe. Ideally
* don't add any new ones but feel free to remove unwanted ones.
*/
/* allowed element names */
let ALLOWED_TAGS = null;
const DEFAULT_ALLOWED_TAGS = addToSet({}, [...html$1, ...svg$1, ...svgFilters, ...mathMl$1, ...text]);
/* Allowed attribute names */
let ALLOWED_ATTR = null;
const DEFAULT_ALLOWED_ATTR = addToSet({}, [...html, ...svg, ...mathMl, ...xml]);
/*
* Configure how DOMPurify should handle custom elements and their attributes as well as customized built-in elements.
* @property {RegExp|Function|null} tagNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any custom elements)
* @property {RegExp|Function|null} attributeNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any attributes not on the allow list)
* @property {boolean} allowCustomizedBuiltInElements allow custom elements derived from built-ins if they pass CUSTOM_ELEMENT_HANDLING.tagNameCheck. Default: `false`.
*/
let CUSTOM_ELEMENT_HANDLING = Object.seal(create(null, {
tagNameCheck: {
writable: true,
configurable: false,
enumerable: true,
value: null
},
attributeNameCheck: {
writable: true,
configurable: false,
enumerable: true,
value: null
},
allowCustomizedBuiltInElements: {
writable: true,
configurable: false,
enumerable: true,
value: false
}
}));
/* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */
let FORBID_TAGS = null;
/* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */
let FORBID_ATTR = null;
/* Decide if ARIA attributes are okay */
let ALLOW_ARIA_ATTR = true;
/* Decide if custom data attributes are okay */
let ALLOW_DATA_ATTR = true;
/* Decide if unknown protocols are okay */
let ALLOW_UNKNOWN_PROTOCOLS = false;
/* Decide if self-closing tags in attributes are allowed.
* Usually removed due to a mXSS issue in jQuery 3.0 */
let ALLOW_SELF_CLOSE_IN_ATTR = true;
/* Output should be safe for common template engines.
* This means, DOMPurify removes data attributes, mustaches and ERB
*/
let SAFE_FOR_TEMPLATES = false;
/* Output should be safe even for XML used within HTML and alike.
* This means, DOMPurify removes comments when containing risky content.
*/
let SAFE_FOR_XML = true;
/* Decide if document with <html>... should be returned */
let WHOLE_DOCUMENT = false;
/* Track whether config is already set on this instance of DOMPurify. */
let SET_CONFIG = false;
/* Decide if all elements (e.g. style, script) must be children of
* document.body. By default, browsers might move them to document.head */
let FORCE_BODY = false;
/* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html
* string (or a TrustedHTML object if Trusted Types are supported).
* If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead
*/
let RETURN_DOM = false;
/* Decide if a DOM `DocumentFragment` should be returned, instead of a html
* string (or a TrustedHTML object if Trusted Types are supported) */
let RETURN_DOM_FRAGMENT = false;
/* Try to return a Trusted Type object instead of a string, return a string in
* case Trusted Types are not supported */
let RETURN_TRUSTED_TYPE = false;
/* Output should be free from DOM clobbering attacks?
* This sanitizes markups named with colliding, clobberable built-in DOM APIs.
*/
let SANITIZE_DOM = true;
/* Achieve full DOM Clobbering protection by isolating the namespace of named
* properties and JS variables, mitigating attacks that abuse the HTML/DOM spec rules.
*
* HTML/DOM spec rules that enable DOM Clobbering:
* - Named Access on Window (§7.3.3)
* - DOM Tree Accessors (§3.1.5)
* - Form Element Parent-Child Relations (§4.10.3)
* - Iframe srcdoc / Nested WindowProxies (§4.8.5)
* - HTMLCollection (§4.2.10.2)
*
* Namespace isolation is implemented by prefixing `id` and `name` attributes
* with a constant string, i.e., `user-content-`
*/
let SANITIZE_NAMED_PROPS = false;
const SANITIZE_NAMED_PROPS_PREFIX = 'user-content-';
/* Keep element content when removing element? */
let KEEP_CONTENT = true;
/* If a `Node` is passed to sanitize(), then performs sanitization in-place instead
* of importing it into a new Document and returning a sanitized copy */
let IN_PLACE = false;
/* Allow usage of profiles like html, svg and mathMl */
let USE_PROFILES = {};
/* Tags to ignore content of when KEEP_CONTENT is true */
let FORBID_CONTENTS = null;
const DEFAULT_FORBID_CONTENTS = addToSet({}, ['annotation-xml', 'audio', 'colgroup', 'desc', 'foreignobject', 'head', 'iframe', 'math', 'mi', 'mn', 'mo', 'ms', 'mtext', 'noembed', 'noframes', 'noscript', 'plaintext', 'script', 'style', 'svg', 'template', 'thead', 'title', 'video', 'xmp']);
/* Tags that are safe for data: URIs */
let DATA_URI_TAGS = null;
const DEFAULT_DATA_URI_TAGS = addToSet({}, ['audio', 'video', 'img', 'source', 'image', 'track']);
/* Attributes safe for values like "javascript:" */
let URI_SAFE_ATTRIBUTES = null;
const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, ['alt', 'class', 'for', 'id', 'label', 'name', 'pattern', 'placeholder', 'role', 'summary', 'title', 'value', 'style', 'xmlns']);
const MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';
/* Document namespace */
let NAMESPACE = HTML_NAMESPACE;
let IS_EMPTY_INPUT = false;
/* Allowed XHTML+XML namespaces */
let ALLOWED_NAMESPACES = null;
const DEFAULT_ALLOWED_NAMESPACES = addToSet({}, [MATHML_NAMESPACE, SVG_NAMESPACE, HTML_NAMESPACE], stringToString);
let MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, ['mi', 'mo', 'mn', 'ms', 'mtext']);
let HTML_INTEGRATION_POINTS = addToSet({}, ['annotation-xml']);
// Certain elements are allowed in both SVG and HTML
// namespace. We need to specify them explicitly
// so that they don't get erroneously deleted from
// HTML namespace.
const COMMON_SVG_AND_HTML_ELEMENTS = addToSet({}, ['title', 'style', 'font', 'a', 'script']);
/* Parsing of strict XHTML documents */
let PARSER_MEDIA_TYPE = null;
const SUPPORTED_PARSER_MEDIA_TYPES = ['application/xhtml+xml', 'text/html'];
const DEFAULT_PARSER_MEDIA_TYPE = 'text/html';
let transformCaseFunc = null;
/* Keep a reference to config to pass to hooks */
let CONFIG = null;
/* Ideally, do not touch anything below this line */
/* ______________________________________________ */
const formElement = document.createElement('form');
const isRegexOrFunction = function isRegexOrFunction(testValue) {
return testValue instanceof RegExp || testValue instanceof Function;
};
/**
* _parseConfig
*
* @param cfg optional config literal
*/
// eslint-disable-next-line complexity
const _parseConfig = function _parseConfig() {
let cfg = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
if (CONFIG && CONFIG === cfg) {
return;
}
/* Shield configuration object from tampering */
if (!cfg || typeof cfg !== 'object') {
cfg = {};
}
/* Shield configuration object from prototype pollution */
cfg = clone(cfg);
PARSER_MEDIA_TYPE =
// eslint-disable-next-line unicorn/prefer-includes
SUPPORTED_PARSER_MEDIA_TYPES.indexOf(cfg.PARSER_MEDIA_TYPE) === -1 ? DEFAULT_PARSER_MEDIA_TYPE : cfg.PARSER_MEDIA_TYPE;
// HTML tags and attributes are not case-sensitive, converting to lowercase. Keeping XHTML as is.
transformCaseFunc = PARSER_MEDIA_TYPE === 'application/xhtml+xml' ? stringToString : stringToLowerCase;
/* Set configuration parameters */
ALLOWED_TAGS = objectHasOwnProperty(cfg, 'ALLOWED_TAGS') ? addToSet({}, cfg.ALLOWED_TAGS, transformCaseFunc) : DEFAULT_ALLOWED_TAGS;
ALLOWED_ATTR = objectHasOwnProperty(cfg, 'ALLOWED_ATTR') ? addToSet({}, cfg.ALLOWED_ATTR, transformCaseFunc) : DEFAULT_ALLOWED_ATTR;
ALLOWED_NAMESPACES = objectHasOwnProperty(cfg, 'ALLOWED_NAMESPACES') ? addToSet({}, cfg.ALLOWED_NAMESPACES, stringToString) : DEFAULT_ALLOWED_NAMESPACES;
URI_SAFE_ATTRIBUTES = objectHasOwnProperty(cfg, 'ADD_URI_SAFE_ATTR') ? addToSet(clone(DEFAULT_URI_SAFE_ATTRIBUTES), cfg.ADD_URI_SAFE_ATTR, transformCaseFunc) : DEFAULT_URI_SAFE_ATTRIBUTES;
DATA_URI_TAGS = objectHasOwnProperty(cfg, 'ADD_DATA_URI_TAGS') ? addToSet(clone(DEFAULT_DATA_URI_TAGS), cfg.ADD_DATA_URI_TAGS, transformCaseFunc) : DEFAULT_DATA_URI_TAGS;
FORBID_CONTENTS = objectHasOwnProperty(cfg, 'FORBID_CONTENTS') ? addToSet({}, cfg.FORBID_CONTENTS, transformCaseFunc) : DEFAULT_FORBID_CONTENTS;
FORBID_TAGS = objectHasOwnProperty(cfg, 'FORBID_TAGS') ? addToSet({}, cfg.FORBID_TAGS, transformCaseFunc) : {};
FORBID_ATTR = objectHasOwnProperty(cfg, 'FORBID_ATTR') ? addToSet({}, cfg.FORBID_ATTR, transformCaseFunc) : {};
USE_PROFILES = objectHasOwnProperty(cfg, 'USE_PROFILES') ? cfg.USE_PROFILES : false;
ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true
ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true
ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false
ALLOW_SELF_CLOSE_IN_ATTR = cfg.ALLOW_SELF_CLOSE_IN_ATTR !== false; // Default true
SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false
SAFE_FOR_XML = cfg.SAFE_FOR_XML !== false; // Default true
WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false
RETURN_DOM = cfg.RETURN_DOM || false; // Default false
RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false
RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false
FORCE_BODY = cfg.FORCE_BODY || false; // Default false
SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true
SANITIZE_NAMED_PROPS = cfg.SANITIZE_NAMED_PROPS || false; // Default false
KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true
IN_PLACE = cfg.IN_PLACE || false; // Default false
IS_ALLOWED_URI$1 = cfg.ALLOWED_URI_REGEXP || IS_ALLOWED_URI;
NAMESPACE = cfg.NAMESPACE || HTML_NAMESPACE;
MATHML_TEXT_INTEGRATION_POINTS = cfg.MATHML_TEXT_INTEGRATION_POINTS || MATHML_TEXT_INTEGRATION_POINTS;
HTML_INTEGRATION_POINTS = cfg.HTML_INTEGRATION_POINTS || HTML_INTEGRATION_POINTS;
CUSTOM_ELEMENT_HANDLING = cfg.CUSTOM_ELEMENT_HANDLING || {};
if (cfg.CUSTOM_ELEMENT_HANDLING && isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck)) {
CUSTOM_ELEMENT_HANDLING.tagNameCheck = cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck;
}
if (cfg.CUSTOM_ELEMENT_HANDLING && isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck)) {
CUSTOM_ELEMENT_HANDLING.attributeNameCheck = cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck;
}
if (cfg.CUSTOM_ELEMENT_HANDLING && typeof cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements === 'boolean') {
CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements = cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements;
}
if (SAFE_FOR_TEMPLATES) {
ALLOW_DATA_ATTR = false;
}
if (RETURN_DOM_FRAGMENT) {
RETURN_DOM = true;
}
/* Parse profile info */
if (USE_PROFILES) {
ALLOWED_TAGS = addToSet({}, text);
ALLOWED_ATTR = [];
if (USE_PROFILES.html === true) {
addToSet(ALLOWED_TAGS, html$1);
addToSet(ALLOWED_ATTR, html);
}
if (USE_PROFILES.svg === true) {
addToSet(ALLOWED_TAGS, svg$1);
addToSet(ALLOWED_ATTR, svg);
addToSet(ALLOWED_ATTR, xml);
}
if (USE_PROFILES.svgFilters === true) {
addToSet(ALLOWED_TAGS, svgFilters);
addToSet(ALLOWED_ATTR, svg);
addToSet(ALLOWED_ATTR, xml);
}
if (USE_PROFILES.mathMl === true) {
addToSet(ALLOWED_TAGS, mathMl$1);
addToSet(ALLOWED_ATTR, mathMl);
addToSet(ALLOWED_ATTR, xml);
}
}
/* Merge configuration parameters */
if (cfg.ADD_TAGS) {
if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {
ALLOWED_TAGS = clone(ALLOWED_TAGS);
}
addToSet(ALLOWED_TAGS, cfg.ADD_TAGS, transformCaseFunc);
}
if (cfg.ADD_ATTR) {
if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {
ALLOWED_ATTR = clone(ALLOWED_ATTR);
}
addToSet(ALLOWED_ATTR, cfg.ADD_ATTR, transformCaseFunc);
}
if (cfg.ADD_URI_SAFE_ATTR) {
addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR, transformCaseFunc);
}
if (cfg.FORBID_CONTENTS) {
if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {
FORBID_CONTENTS = clone(FORBID_CONTENTS);
}
addToSet(FORBID_CONTENTS, cfg.FORBID_CONTENTS, transformCaseFunc);
}
/* Add #text in case KEEP_CONTENT is set to true */
if (KEEP_CONTENT) {
ALLOWED_TAGS['#text'] = true;
}
/* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */
if (WHOLE_DOCUMENT) {
addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);
}
/* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */
if (ALLOWED_TAGS.table) {
addToSet(ALLOWED_TAGS, ['tbody']);
delete FORBID_TAGS.tbody;
}
if (cfg.TRUSTED_TYPES_POLICY) {
if (typeof cfg.TRUSTED_TYPES_POLICY.createHTML !== 'function') {
throw typeErrorCreate('TRUSTED_TYPES_POLICY configuration option must provide a "createHTML" hook.');
}
if (typeof cfg.TRUSTED_TYPES_POLICY.createScriptURL !== 'function') {
throw typeErrorCreate('TRUSTED_TYPES_POLICY configuration option must provide a "createScriptURL" hook.');
}
// Overwrite existing TrustedTypes policy.
trustedTypesPolicy = cfg.TRUSTED_TYPES_POLICY;
// Sign local variables required by `sanitize`.
emptyHTML = trustedTypesPolicy.createHTML('');
} else {
// Uninitialized policy, attempt to initialize the internal dompurify policy.
if (trustedTypesPolicy === undefined) {
trustedTypesPolicy = _createTrustedTypesPolicy(trustedTypes, currentScript);
}
// If creating the internal policy succeeded sign internal variables.
if (trustedTypesPolicy !== null && typeof emptyHTML === 'string') {
emptyHTML = trustedTypesPolicy.createHTML('');
}
}
// Prevent further manipulation of configuration.
// Not available in IE8, Safari 5, etc.
if (freeze) {
freeze(cfg);
}
CONFIG = cfg;
};
/* Keep track of all possible SVG and MathML tags
* so that we can perform the namespace checks
* correctly. */
const ALL_SVG_TAGS = addToSet({}, [...svg$1, ...svgFilters, ...svgDisallowed]);
const ALL_MATHML_TAGS = addToSet({}, [...mathMl$1, ...mathMlDisallowed]);
/**
* @param element a DOM element whose namespace is being checked
* @returns Return false if the element has a
* namespace that a spec-compliant parser would never
* return. Return true otherwise.
*/
const _checkValidNamespace = function _checkValidNamespace(element) {
let parent = getParentNode(element);
// In JSDOM, if we're inside shadow DOM, then parentNode
// can be null. We just simulate parent in this case.
if (!parent || !parent.tagName) {
parent = {
namespaceURI: NAMESPACE,
tagName: 'template'
};
}
const tagName = stringToLowerCase(element.tagName);
const parentTagName = stringToLowerCase(parent.tagName);
if (!ALLOWED_NAMESPACES[element.namespaceURI]) {
return false;
}
if (element.namespaceURI === SVG_NAMESPACE) {
// The only way to switch from HTML namespace to SVG
// is via <svg>. If it happens via any other tag, then
// it should be killed.
if (parent.namespaceURI === HTML_NAMESPACE) {
return tagName === 'svg';
}
// The only way to switch from MathML to SVG is via`
// svg if parent is either <annotation-xml> or MathML
// text integration points.
if (parent.namespaceURI === MATHML_NAMESPACE) {
return tagName === 'svg' && (parentTagName === 'annotation-xml' || MATHML_TEXT_INTEGRATION_POINTS[parentTagName]);
}
// We only allow elements that are defined in SVG
// spec. All others are disallowed in SVG namespace.
return Boolean(ALL_SVG_TAGS[tagName]);
}
if (element.namespaceURI === MATHML_NAMESPACE) {
// The only way to switch from HTML namespace to MathML
// is via <math>. If it happens via any other tag, then
// it should be killed.
if (parent.namespaceURI === HTML_NAMESPACE) {
return tagName === 'math';
}
// The only way to switch from SVG to MathML is via
// <math> and HTML integration points
if (parent.namespaceURI === SVG_NAMESPACE) {
return tagName === 'math' && HTML_INTEGRATION_POINTS[parentTagName];
}
// We only allow elements that are defined in MathML
// spec. All others are disallowed in MathML namespace.
return Boolean(ALL_MATHML_TAGS[tagName]);
}
if (element.namespaceURI === HTML_NAMESPACE) {
// The only way to switch from SVG to HTML is via
// HTML integration points, and from MathML to HTML
// is via MathML text integration points
if (parent.namespaceURI === SVG_NAMESPACE && !HTML_INTEGRATION_POINTS[parentTagName]) {
return false;
}
if (parent.namespaceURI === MATHML_NAMESPACE && !MATHML_TEXT_INTEGRATION_POINTS[parentTagName]) {
return false;
}
// We disallow tags that are specific for MathML
// or SVG and should never appear in HTML namespace
return !ALL_MATHML_TAGS[tagName] && (COMMON_SVG_AND_HTML_ELEMENTS[tagName] || !ALL_SVG_TAGS[tagName]);
}
// For XHTML and XML documents that support custom namespaces
if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && ALLOWED_NAMESPACES[element.namespaceURI]) {
return true;
}
// The code should never reach this place (this means
// that the element somehow got namespace that is not
// HTML, SVG, MathML or allowed via ALLOWED_NAMESPACES).
// Return false just in case.
return false;
};
/**
* _forceRemove
*
* @param node a DOM node
*/
const _forceRemove = function _forceRemove(node) {
arrayPush(DOMPurify.removed, {
element: node
});
try {
// eslint-disable-next-line unicorn/prefer-dom-node-remove
getParentNode(node).removeChild(node);
} catch (_) {
remove(node);
}
};
/**
* _removeAttribute
*
* @param name an Attribute name
* @param element a DOM node
*/
const _removeAttribute = function _removeAttribute(name, element) {
try {
arrayPush(DOMPurify.removed, {
attribute: element.getAttributeNode(name),
from: element
});
} catch (_) {
arrayPush(DOMPurify.removed, {
attribute: null,
from: element
});
}
element.removeAttribute(name);
// We void attribute values for unremovable "is" attributes
if (name === 'is') {
if (RETURN_DOM || RETURN_DOM_FRAGMENT) {
try {
_forceRemove(element);
} catch (_) {}
} else {
try {
element.setAttribute(name, '');
} catch (_) {}
}
}
};
/**
* _initDocument
*
* @param dirty - a string of dirty markup
* @return a DOM, filled with the dirty markup
*/
const _initDocument = function _initDocument(dirty) {
/* Create a HTML document */
let doc = null;
let leadingWhitespace = null;
if (FORCE_BODY) {
dirty = '<remove></remove>' + dirty;
} else {
/* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */
const matches = stringMatch(dirty, /^[\r\n\t ]+/);
leadingWhitespace = matches && matches[0];
}
if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && NAMESPACE === HTML_NAMESPACE) {
// Root of XHTML doc must contain xmlns declaration (see https://www.w3.org/TR/xhtml1/normative.html#strict)
dirty = '<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body>' + dirty + '</body></html>';
}
const dirtyPayload = trustedTypesPolicy ? trustedTypesPolicy.createHTML(dirty) : dirty;
/*
* Use the DOMParser API by default, fallback later if needs be
* DOMParser not work for svg when has multiple root element.
*/
if (NAMESPACE === HTML_NAMESPACE) {
try {
doc = new DOMParser().parseFromString(dirtyPayload, PARSER_MEDIA_TYPE);
} catch (_) {}
}
/* Use createHTMLDocument in case DOMParser is not available */
if (!doc || !doc.documentElement) {
doc = implementation.createDocument(NAMESPACE, 'template', null);
try {
doc.documentElement.innerHTML = IS_EMPTY_INPUT ? emptyHTML : dirtyPayload;
} catch (_) {
// Syntax error if dirtyPayload is invalid xml
}
}
const body = doc.body || doc.documentElement;
if (dirty && leadingWhitespace) {
body.insertBefore(document.createTextNode(leadingWhitespace), body.childNodes[0] || null);
}
/* Work on whole document or just its body */
if (NAMESPACE === HTML_NAMESPACE) {
return getElementsByTagName.call(doc, WHOLE_DOCUMENT ? 'html' : 'body')[0];
}
return WHOLE_DOCUMENT ? doc.documentElement : body;
};
/**
* Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document.
*
* @param root The root element or node to start traversing on.
* @return The created NodeIterator
*/
const _createNodeIterator = function _createNodeIterator(root) {
return createNodeIterator.call(root.ownerDocument || root, root,
// eslint-disable-next-line no-bitwise
NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT | NodeFilter.SHOW_PROCESSING_INSTRUCTION | NodeFilter.SHOW_CDATA_SECTION, null);
};
/**
* _isClobbered
*
* @param element element to check for clobbering attacks
* @return true if clobbered, false if safe
*/
const _isClobbered = function _isClobbered(element) {
return element instanceof HTMLFormElement && (typeof element.nodeName !== 'string' || typeof element.textContent !== 'string' || typeof element.removeChild !== 'function' || !(element.attributes instanceof NamedNodeMap) || typeof element.removeAttribute !== 'function' || typeof element.setAttribute !== 'function' || typeof element.namespaceURI !== 'string' || typeof element.insertBefore !== 'function' || typeof element.hasChildNodes !== 'function');
};
/**
* Checks whether the given object is a DOM node.
*
* @param value object to check whether it's a DOM node
* @return true is object is a DOM node
*/
const _isNode = function _isNode(value) {
return typeof Node === 'function' && value instanceof Node;
};
function _executeHooks(hooks, currentNode, data) {
arrayForEach(hooks, hook => {
hook.call(DOMPurify, currentNode, data, CONFIG);
});
}
/**
* _sanitizeElements
*
* @protect nodeName
* @protect textContent
* @protect removeChild
* @param currentNode to check for permission to exist
* @return true if node was killed, false if left alive
*/
const _sanitizeElements = function _sanitizeElements(currentNode) {
let content = null;
/* Execute a hook if present */
_executeHooks(hooks.beforeSanitizeElements, currentNode, null);
/* Check if element is clobbered or can clobber */
if (_isClobbered(currentNode)) {
_forceRemove(currentNode);
return true;
}
/* Now let's check the element's type and name */
const tagName = transformCaseFunc(currentNode.nodeName);
/* Execute a hook if present */
_executeHooks(hooks.uponSanitizeElement, currentNode, {
tagName,
allowedTags: ALLOWED_TAGS
});
/* Detect mXSS attempts abusing namespace confusion */
if (currentNode.hasChildNodes() && !_isNode(currentNode.firstElementChild) && regExpTest(/<[/\w]/g, currentNode.innerHTML) && regExpTest(/<[/\w]/g, currentNode.textContent)) {
_forceRemove(currentNode);
return true;
}
/* Remove any occurrence of processing instructions */
if (currentNode.nodeType === NODE_TYPE.progressingInstruction) {
_forceRemove(currentNode);
return true;
}
/* Remove any kind of possibly harmful comments */
if (SAFE_FOR_XML && currentNode.nodeType === NODE_TYPE.comment && regExpTest(/<[/\w]/g, currentNode.data)) {
_forceRemove(currentNode);
return true;
}
/* Remove element if anything forbids its presence */
if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {
/* Check if we have a custom element to handle */
if (!FORBID_TAGS[tagName] && _isBasicCustomElement(tagName)) {
if (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, tagName)) {
return false;
}
if (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(tagName)) {
return false;
}
}
/* Keep content except for bad-listed elements */
if (KEEP_CONTENT && !FORBID_CONTENTS[tagName]) {
const parentNode = getParentNode(currentNode) || currentNode.parentNode;
const childNodes = getChildNodes(currentNode) || currentNode.childNodes;
if (childNodes && parentNode) {
const childCount = childNodes.length;
for (let i = childCount - 1; i >= 0; --i) {
const childClone = cloneNode(childNodes[i], true);
childClone.__removalCount = (currentNode.__removalCount || 0) + 1;
parentNode.insertBefore(childClone, getNextSibling(currentNode));
}
}
}
_forceRemove(currentNode);
return true;
}
/* Check whether element has a valid namespace */
if (currentNode instanceof Element && !_checkValidNamespace(currentNode)) {
_forceRemove(currentNode);
return true;
}
/* Make sure that older browsers don't get fallback-tag mXSS */
if ((tagName === 'noscript' || tagName === 'noembed' || tagName === 'noframes') && regExpTest(/<\/no(script|embed|frames)/i, currentNode.innerHTML)) {
_forceRemove(currentNode);
return true;
}
/* Sanitize element content to be template-safe */
if (SAFE_FOR_TEMPLATES && currentNode.nodeType === NODE_TYPE.text) {
/* Get the element's text content */
content = currentNode.textContent;
arrayForEach([MUSTACHE_EXPR, ERB_EXPR, TMPLIT_EXPR], expr => {
content = stringReplace(content, expr, ' ');
});
if (currentNode.textContent !== content) {
arrayPush(DOMPurify.removed, {
element: currentNode.cloneNode()
});
currentNode.textContent = content;
}
}
/* Execute a hook if present */
_executeHooks(hooks.afterSanitizeElements, currentNode, null);
return false;
};
/**
* _isValidAttribute
*
* @param lcTag Lowercase tag name of containing element.
* @param lcName Lowercase attribute name.
* @param value Attribute value.
* @return Returns true if `value` is valid, otherwise false.
*/
// eslint-disable-next-line complexity
const _isValidAttribute = function _isValidAttribute(lcTag, lcName, value) {
/* Make sure attribute cannot clobber */
if (SANITIZE_DOM && (lcName === 'id' || lcName === 'name') && (value in document || value in formElement)) {
return false;
}
/* Allow valid data-* attributes: At least one character after "-"
(https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)
XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)
We don't need to check the value; it's always URI safe. */
if (ALLOW_DATA_ATTR && !FORBID_ATTR[lcName] && regExpTest(DATA_ATTR, lcName)) ; else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR, lcName)) ; else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {
if (
// First condition does a very basic check if a) it's basically a valid custom element tagname AND
// b) if the tagName passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck
// and c) if the attribute name passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.attributeNameCheck
_isBasicCustomElement(lcTag) && (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, lcTag) || CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(lcTag)) && (CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.attributeNameCheck, lcName) || CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.attributeNameCheck(lcName)) ||
// Alternative, second condition checks if it's an `is`-attribute, AND
// the value passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck