mORMot Open Source

Leslie7

Member

Registered: 2015-06-25

Posts: 248

PDF electronic signature

AB,

I have seen the closed ticket, just one note:

I am not sure if you have realized that electronic signature differs from digital. It just inserts the scanned signature as a picture, but after the document is saved it is not supposed to be editable any more.  So it may not be very difficult to implement. 

Last edited by Leslie7 (2018-04-29 09:28:08)

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 14,659

Website

Re: PDF electronic signature

Yes, tickets are for bug reports, after discussion in the forum.
They are not the place to discuss.

You can create a PDF with a signature, then save it as PDF/A-1 so that it will be not editable any more.

But to add such a picture to an existing pdf, you will need to read the pdf, which is a feature not available yet with SynPDF.

Leslie7

Member

Registered: 2015-06-25

Posts: 248

Re: PDF electronic signature

@anonymous (who created the ticket)

I guess if each page of the original file can be  converted to an image (instead of single PDF) the images can be used for recreating your document with  SynPDF and sign it the way AB suggested. The size probably will be larger though.

displaying the PDF:

AcrobatReader  with OLE

OR

Delphi   - Winsoft PDFium
Lazarus - MuPDF

It is possible that  you can sign a PDF with these as well.

Last edited by Leslie7 (2018-04-30 11:08:25)

Leslie7

Member

Registered: 2015-06-25

Posts: 248

Re: PDF electronic signature

Yes, tickets are for bug reports, after discussion in the forum.
They are not the place to discuss.

You can create a PDF with a signature, then save it as PDF/A-1 so that it will be not editable any more.

But to add such a picture to an existing pdf, you will need to read the pdf, which is a feature not available yet with SynPDF.

So SynPDf can be used for electronic signature already.
Thanks!