Unimplemented annotation type (Widget signature)

[JasnaPaka]

When I try to show this almost empty document I see info message that this pdf document can be showed in a wrong way. I use latest Firefox Nightly on Windows.

Document for test:
http://www.jasnapaka.com/bugs/pdf-js-pdf-test.pdf

Console output:
"PDF e7bebed68f057fccbb46e62786e65d2 [1.4 iText 2.1.7 by 1T3XT / -](PDF.js: 0.8.759)" viewer.js:2601
"Warning: AcroForm/XFA is not supported" viewer.js:2616
"Warning: TODO: unimplemented annotation type: Widget signature" pdf.js:198
"Warning: TODO: unimplemented annotation type: Widget"

[yurydelendik]

This document appear to be empty in the Preview for Max OSX.

Signature annotations are blocked by #1076 -- we shall not show those annotations until the document digital signature is verified.

[yurydelendik]

It's empty for Adobe Reader too:

Probably some proprietary data or plugin installation is required

[yurydelendik]

related #1076

[staromeste]

Actually the document is correctly signed, but the signature field is invisible.

Can you tell me why you decided not to show the signature field unless it's verified? Even Adobe does not seem to care about that. Take this document for example: https://www.dropbox.com/s/c1x1fe6fud0j4as/SampleSignedPDFDocument.pdf?dl=0
I've tampered with it and Adobe still shows the signature field: https://www.dropbox.com/s/6nvjlcilua5qaz4/SampleInvalidSignaturePDFDocument.pdf?dl=0

Maybe we just need a way to alert the user that the PDF is signed but we are unable to verify it.

The signature verification process is heavy and complex so a library like forge.js may be very useful. I'm trying to do just that, do you think it's worth doing?

[luozt]

I also encountered this problem... I added the signature by wacom device and it produced a pdf with signature. However the pdf viewer of Mozilla Firefox did not show the signature when opening the pdf. And the chrome supports pdf with signature.

[rmhrisk]

We have implemented a digital signature solution based on PKIjs and PDFjs that is capable of verifying and creating digital signatures. You can see an example of it viewing the US Digital Signature law here.

The viewer currently trusts the CAs on the eIDAS Trust List as well the Mozilla trusted S/MIME issuers.

If you encounter any issues email me at ryan@peculiarventures.com with sample files if any.

[timvandermeij]

Closing since this is a duplicate of #1076.