PDF Digital Signatures warning message not correct #2486
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This is a great feature to have. E.g. in Czech Republic it is possible to use singed PDF (if you have key from one of the approved CA`s) for official communication with government services. This is why i am still using Acrobat Reader/Linux, because it is only viewer with such functionality. |
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@taewong - if you have nothing to do, please do not spam. Your comment is totally useless and offtopic. |
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The first PDF file gives the following in the console: Warning: TODO: unimplemented annotation type: Widget signature Warning: TODO: unimplemented annotation type: Widget So, you're right that feature is missing. The second PDF gives a more serious error message (sorry, partly Dutch...): XRef_getEntry@resource://pdf.js/build/pdf.js:5625 XRef_fetch@resource://pdf.js/build/pdf.js:5644 XRef_fetchIfRef@resource://pdf.js/build/pdf.js:5630 Dict_get@resource://pdf.js/build/pdf.js:4803 getDefaultAppearance@resource://pdf.js/build/pdf.js:6099 Annotation@resource://pdf.js/build/pdf.js:6144 WidgetAnnotation@resource://pdf.js/build/pdf.js:6371 Annotation_fromRef@resource://pdf.js/build/pdf.js:6319 pdfjsWrapper/Page.prototype.annotations@resource://pdf.js/build/pdf.js:929 NetworkPdfManager_ensureHelper@resource://pdf.js/build/pdf.js:638 NetworkPdfManager_ensure@resource://pdf.js/build/pdf.js:630 Page_getOperatorList@resource://pdf.js/build/pdf.js:851 pdfjsWrapper/wphSetup/wphSetupRenderPage/@resource://pdf.js/build/pdf.js:37057 runHandlers@resource://pdf.js/build/pdf.js:1875 XRef_getEntry@resource://pdf.js/build/pdf.js:5625 XRef_fetch@resource://pdf.js/build/pdf.js:5644 XRef_fetchIfRef@resource://pdf.js/build/pdf.js:5630 Dict_get@resource://pdf.js/build/pdf.js:4803 getDefaultAppearance@resource://pdf.js/build/pdf.js:6099 Annotation@resource://pdf.js/build/pdf.js:6144 WidgetAnnotation@resource://pdf.js/build/pdf.js:6371 Annotation_fromRef@resource://pdf.js/build/pdf.js:6319 pdfjsWrapper/Page.prototype.annotations@resource://pdf.js/build/pdf.js:929 Page_getAnnotationsData@resource://pdf.js/build/pdf.js:916 NetworkPdfManager_ensureHelper@resource://pdf.js/build/pdf.js:640 NetworkPdfManager_ensure@resource://pdf.js/build/pdf.js:630 pdfjsWrapper/wphSetup/wphSetupGetAnnotations/@resource://pdf.js/build/pdf.js:37040 runHandlers@resource://pdf.js/build/pdf.js:1875 Er is een probleem opgetreden bij het renderen van de pagina. PDF.js versie 0.8.388 (build 02906d7) Bericht: e is undefined Stack: XRef_getEntry@resource://pdf.js/build/pdf.js:5625 XRef_fetch@resource://pdf.js/build/pdf.js:5644 XRef_fetchIfRef@resource://pdf.js/build/pdf.js:5630 Dict_get@resource://pdf.js/build/pdf.js:4803 getDefaultAppearance@resource://pdf.js/build/pdf.js:6099 Annotation@resource://pdf.js/build/pdf.js:6144 WidgetAnnotation@resource://pdf.js/build/pdf.js:6371 Annotation_fromRef@resource://pdf.js/build/pdf.js:6319 pdfjsWrapper/Page.prototype.annotations@resource://pdf.js/build/pdf.js:929 NetworkPdfManager_ensureHelper@resource://pdf.js/build/pdf.js:638 NetworkPdfManager_ensure@resource://pdf.js/build/pdf.js:630 Page_getOperatorList@resource://pdf.js/build/pdf.js:851 pdfjsWrapper/wphSetup/wphSetupRenderPage/@resource://pdf.js/build/pdf.js:37057 runHandlers@resource://pdf.js/build/pdf.js:1875 Warning: Unhandled rejection: TypeError: e is undefined |
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related #1076 |
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Closing since this is a duplicate of #1076. |
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If a pdf is signed with a standard digital signature, then the viewer:
Issue: the warning message is incorrect -- the document will NOT be displayed correctly because digital signatures are not yet handled by the viewer.
Some test pdf's that were digitally signed:
http://ftp.arx.com/Samples/signed_with_graphical_sig.pdf -- signed with a private certificate
http://ftp.arx.com/Samples/signed_with_no_graphical_sig.pdf -- signed with a digital signature but no graphical signature – a typical application-generated file
It would be great if the error message (not warning message) said that the document includes one or more digital signatures.
If you'd like to digitally sign your own pdf documents, I can provide some no-cost licenses for our signing software for your testing purposes.
Regards,
Larry Kluger
larryk@arx.com
More about digital signatures
There are compatible US and international standards for digitally signing pdfs, and other types of datasets (xml, etc).
For pdf's, the standards are: ISO 32000-1:2008 FIPS 186-3 from NIST and ETSI.org PAdES TS 102 778 (search for PAdES here)
The signatures can be correctly viewed when using Adobe reader (standalone or as a plugin), and other pdf viewers too. See below for more info.
The standards are obtuse and have many options that are either usually or rarely used by the digital signature ISV community. If you would like more info about this or interoperability issues, please let us know. ARX is 25 years old and we have a great deal of development expertise in these cryptographic issues.
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