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Add a bit more validation to Catalog_readPageLabels, to ensure that the Page Labels are well formed

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This commit is contained in:
Jonas Jenwald 2016-11-03 20:08:06 +01:00
parent 2d8d8b5e53
commit 0844a72b4d
1 changed files with 8 additions and 8 deletions
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16
src/core/obj.js
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@ -283,7 +283,6 @@ var Catalog = (function CatalogClosure() {
var pageLabels = new Array(this.numPages); var pageLabels = new Array(this.numPages);
var style = null; var style = null;
var prefix = ''; var prefix = '';
var start = 1;
var numberTree = new NumberTree(obj, this.xref); var numberTree = new NumberTree(obj, this.xref);
var nums = numberTree.getAll(); var nums = numberTree.getAll();
@ -300,15 +299,16 @@ var Catalog = (function CatalogClosure() {
var s = labelDict.get('S'); var s = labelDict.get('S');
assert(!s || isName(s), 'Invalid style in PageLabel dictionary.'); assert(!s || isName(s), 'Invalid style in PageLabel dictionary.');
style = (s ? s.name : null); style = s ? s.name : null;
var p = labelDict.get('P') || ''; var p = labelDict.get('P');
assert(isString(p), 'Invalid prefix in PageLabel dictionary.'); assert(!p || isString(p), 'Invalid prefix in PageLabel dictionary.');
prefix = stringToPDFString(p); prefix = p ? stringToPDFString(p) : '';
start = labelDict.get('St') || 1; var st = labelDict.get('St');
assert(isInt(start), 'Invalid start in PageLabel dictionary.'); assert(!st || (isInt(st) && st >= 1),
currentIndex = start; 'Invalid start in PageLabel dictionary.');
currentIndex = st || 1;
} }
switch (style) { switch (style) {