https://bugs.documentfoundation.org/show_bug.cgi?id=98155
Bug ID: 98155
Summary: Export to PDF/PDF A/1A sign and/or timestamp
Product: LibreOffice
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: LibreOffice
Assignee: [email protected]
Reporter: [email protected]
From: Fulano Diego Perez <[email protected]>
To: [email protected]
Subject: writer export to PDF/PDF A/1A sign and/or timestamp
Date: Tue, 12 Jan 2016 02:44:58 +1100
Package: libreoffice
Version: 1:5.0.4~rc2-2
Severity: normal
i would like to make a couple of proposals
currently, this seems to work when exporting from writer:
* PDF and PDF A/1a
* CA cert signed signature
* timestamped with non http[s] AUTH based timestamp server
this produces a PDF:
sha1 hashed
document restrictions summary, not allowed:
changing the document
document assembly
i can't get a PDF A/1a timestamped with one which requires http[s] AUTH
does writer support AUTH to enter credentials over http[s]?
signing just with a CA valid cert does work to a non PDF A/1a, but
opening the PDF in a windows acrobat or reader shows a modification
warning after signing
suggest some things need to be looked into in terms of:
when signing/timestamping within Acrobat, and locking the document,
causes the following restrictions _in addition_ to above:
commenting
filling of form fields
signing of form fields
creation of template pages
once a PDF is signed, there should be an option to enable/disable future
signing
once it's timestamped, no further changes should be allowed, it should
be 'locked' similarly to how Acrobat changes restrictions
no idea what is/is not possible in terms of doing this outside of
Acrobat but an sha256 hashed doc should be considered do-able (default
in Acrobat with recent updates)
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