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Ensure that saveDocument works if there's no /ID-entry in the PDF document (issue 13279) (#13280)

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First of all, while it should be very unlikely that the /ID-entry is an *indirect* object, note how we're using `Dict.get` when parsing it e.g. in `PDFDocument.fingerprint`. Hence we definitely should be consistent here, since if the /ID-entry is an *indirect* object the existing code in `src/core/writer.js` would already fail.
Secondly, to fix the referenced issue, we also need to check that the /ID-entry actually is an Array before attempting to access its contents in `src/core/writer.js`.

*Drive-by change:* In the `xrefInfo` object passed to the `incrementalUpdate` function, re-name the `encrypt` property to `encryptRef` since its data is fetched using `Dict.getRaw` (given the names of the other properties fetched similarly).
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Jonas Jenwald 2021-04-22 12:08:56 +02:00 • committed by GitHub
parent 8538cdf845
commit 57a1ea840f
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3 changed files with 40 additions and 6 deletions
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src/core/worker.js
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@ -633,11 +633,11 @@ class WorkerMessageHandler {
newXrefInfo = {
rootRef: xref.trailer.getRaw("Root") || null,
encrypt: xref.trailer.getRaw("Encrypt") || null,
encryptRef: xref.trailer.getRaw("Encrypt") || null,
newRef: xref.getNewRef(),
infoRef: xref.trailer.getRaw("Info") || null,
info: infoObj,
fileIds: xref.trailer.getRaw("ID") || null,
fileIds: xref.trailer.get("ID") || null,
startXRef,
filename,
};