Re: [libreoffice-users] Setting the hash for time stamping when create PDF

Hello Vesselin

I apologize for my previous reply. Did not catch the caveat at the 
bottom of the page.

> *Notice*: The main limitation on OpenOffice 5 is that you can't change 
> the hash used "SHA1" that really shouldn't be used for security 
> related purposes like signing documents. There are external 
> applications better for this purpose.
Paul


On 4/9/2017 5:49 PM, Vesselin Kolev wrote:
> Dear All,
>
> Since I cannot find a complete answer of my question neither in the
> LibreOffice Documentation nor on the Internet, I decided to forward it
> to this mailing list.
>
> Is there any way (even through external Java class) to specify the hash
> algorithm when requesting TSA based time stamp? At the present
> LibreOffice creates a time stamp request based on SHA1. But this hash
> algorithm is considered obsolete. Hence that automatically turns the
> time stamped PDF into insecure ones. Note that the same problem occurs
> with all signature produced by LibreOffice in general - no possibility
> to specify the parameters for creating the signature.
>
> Thank you very much in advance for your response!
>
> Best regards,
>
> Vesselin Kolev


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