Error during digital signature process

New Here ,
Mar 31, 2022 Mar 31, 2022

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Hi there,

I have a problem signing a PDF (SHA256 RSA) with Adobe Reader DC. I am using a certificate that is linked to a custom CSP. I made debug in the CSP part of the process and the last CSP call made is to "CPSignHash" with pbSignature=NULL. This method is returning TRUE but the next call is to "CPDestroyHash" with getLastError=183

After this Reader DC starts another signature process but hashing in SHA1, but my CSP does not support it, so it fails.

How can I determine the problem in the signature process? 

I hace been trying with Microsoft Word and the sign is done correctly.

Also I have been trying the different options in preferences with no luck.

Thanks everyone

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Security digital signatures and esignatures

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