Digitally signed pdf documents

[chmike]

I need support for digitally signed pdf documents. The goal is to ensure that no one beside the signer ("notar") can modify the document. This is needed for contracts or quotes. Is this supported by gofpdf ? 

[jung-kurt]

Digital signing is not currently supported by gofpdf but it would be a very welcome feature. I am sure the Go standard library has everything we need to do this. Do you have any leads as to how it is done?

[chmike]

Here is a document I just found that seam to explain it. I can't help more than that. I hope some pdf encoding expert can understand it and see what needs to be done.

[jung-kurt]

Thanks, @chmike -- I'll look into this.

[raliste]

Hi guys, is there any support for this? I might be able to help as well.

[jung-kurt]

There is currently no support for this. Your help would be very welcome.

[mpingram]

Good news, I have a draft of this -- I'm going to try to put up a WIP PR tonight or tomorrow for feedback.

[jung-kurt]

Great!

[adamlc]

@mpingram how did you get on with this? 😃

[itsbalamurali]

Looking for contributors on #182. @raliste @mpingram

[pjanx]

In the meantime, I have ported my C++ signer to Go: https://git.janouch.name/p/pdf-simple-sign https://godoc.org/janouch.name/pdf-simple-sign/pdf

It works for Cairo-produced documents, is a working PoC, and can be used as a post-processing step.

I hope it helps. I can provide consultation and reviews.

[jung-kurt]

Great work, @pjanx! I look forward to working with this.

[sayhei]

how is that going?@itsbalamurali

[yindia]

We are also looking for same solution in our project. Any Update ? Any help wanted ? @itsbalamurali @jung-kurt

[jung-kurt]

There have been a couple steps toward a solution but no working pull request with tests has been submitted.

Any help wanted ?

Definitely.

[itsbalamurali]

@evalsocket we can port the functionality of https://git.janouch.name/p/pdf-simple-sign into gofpdf.