Signing PDFs and Timestamps (reloaded)

Discussions about PDF management.
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Re: Signing PDFs and Timestamps (reloaded)

Post by Gabriela » Wed Mar 21, 2018 9:20 am

I can confirm that SHA-256 is used as default now, as from 2016 onward the SHA-1 algorithm is deprecated.
You can find more details here: ... eHash.html
Kind regards,

GdPicture Team

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Re: Signing PDFs and Timestamps (reloaded)

Post by MattyBoy » Thu Nov 08, 2018 11:52 pm

We have a "Symantec Class 3 SHA256 Code Signing CA" certificate. I can only sign if I set the hash to SHA1. ApplySignature returns a status of "CertificateWrongFormat" if I try SHA256. Am I doing something wrong.

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Joined: Tue Jan 15, 2019 1:00 pm

Re: Signing PDFs and Timestamps (reloaded)

Post by Matus » Wed Jan 16, 2019 4:40 pm


The latest release contains modifications that enable automatic recognition of supported hash. Supported hash should be automatically recognized after using any SetSignatureCertificateFrom* method.
If the issues persists i would advise to open support ticket so that we can get a closer look at what is going on and solve the issues.
Best Regards,

GdPicture Dev Team

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