hsyl20 / HPDF

Haskell library for PDF generation (graphics and typesetting)
Other
12 stars 7 forks source link

Add support for Digital Signatures #8

Open hsyl20 opened 2 years ago

hsyl20 commented 2 years ago

HPDF lacks support for Digital Signatures. It would be nice to add it.

Resources:

mgajda commented 2 years ago

I understand there are three possible items:

  1. Adding entries to PDF dictionary with signatures (this ticket)
  2. Assuring that all content is embedded, to guarantee invariant rendering over time (possibly letting embedded fonts pass through).
  3. If PDF is a PDF form, then adding visual clues about signature within relevant field.

Reference document from Adobe

migamake