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Digital Signature on PDF

weltspion
Participant
0 Kudos

Hi Folks!

I'd like to digitally sign a PDF document out of an ABAP program or class, just to ensure that the document was not modified by anyone.

In my program I hold the PDF as a binary stream in a XSTRING variable. I convert it into a binary table and use the function module 'SSF_KRN_SIGN_BY_AS' to sign this binary stream. In general, this is working fine (validating it with function module 'SSF_KRN_VERIFY' is successful).

But if I open the generated file with Acrobat Reader, no signature is found.

Obviously it does not work to sign the binary directly, as I did.

How can I create a digital signature on PDFs using ABAP? Do I have to convert it into ASCII or so before? Or: How must a signature be attached to a PDF file?

Our release is 620. Every little hint is appreciated.

Regards,

Torsten

1 REPLY 1

Former Member
0 Kudos

Hi Torsten,

It's a bit old but, I've read your post about digital signature...

Could you please explain me how did you customize the system to allow using SSFG Funtion Group?

Thanks in advance.

Regards.

Urtzi.

Message was edited by:

Urtzi Barandiaran Aguirre