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Support of Digital Signatures and Attachment Annotations #11

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schiopumadalin commented Jan 26, 2017

Hi guys,

We are back with the pull request, after including the Attachment Annotations as well beside the Digital Signatures.
We included in the commit a sample project for these features.

Waiting for your feedback,
KDS Team

@Bicolt Bicolt mentioned this pull request Mar 24, 2017

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jcalixv commented Jun 22, 2017

Hi, First of all, Thank you very much for your enhancements, just what I need.
I Just tried your code and it does sign previously created pdf files.
The Signer contact's Info is not showing, but... not importan.

I just read comments and the PdfSharp team wont be adding this any time soon, many of us will love to have this functions, in my case, sign and verity pdf signatures (failed to find the verify signature part) is all I need, but cross platform (Xamarin.Android, Xamarin.Ios and Net 4.5.

Are you gonna keep working on this at least add the verify signature part???
Thank you so much for your time.

Is it of, if I take this code and try to make it Net Standard??

According to the Net Portability Analizer This Project cannot be ported to Net Portable or Net Standard.
Well, this is it for me. I need to sign the created PDF from Xamarin.Android and Xamarin.Ios (using the Keystore/keychain Private Key)



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farlop commented Sep 6, 2017

Hi! We are trying to use your PR in order to digitally sign PDFs by different people. It is working fine when the document is not signed, but when we try to add a second sign to the file, it fails. At first time, it fails trying to add the 'SigFlags' keys (which already exists). After adding code to control this in 'AddSignatureComponents' method, the PDF file is successfully generated, but opening with Acrobat Reader shows that the first sign is not valid, just the second one. We don't know how to proceed in this situation, could you please give me a hand?


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Gingetsuryuu commented Apr 12, 2019

Hi. I needed this feature for a project,but I needed a few changes to it, and I needed it with the existing stable release. I've gone ahead and a made a fork, and locally merged this into a stable release and made a few changes. I don't want to step on @schiopumadalin 's toes or anyone else's though, so what should I do?

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