9 Dec
2024
9 Dec
'24
2:46 p.m.
Dr. Nikolaus Klepp via tde-users wrote:
Why don't you add this to TGW, it could be implemented at some point of time
Hi Stefan!
Anno domini 2024 Sat, 30 Nov 12:18:58 +0100
Stefan Krusche via tde-users scripsit:
> Good day everyone,
>
> just to add to what has been said, to modify the PDF file to make it
> readable by kpdf, see below…
>
> Am Sonntag, 25. August 2024 schrieb E. Liddell via tde-users:
> > On Sun, 25 Aug 2024 12:32:04 +0200
> >
> > "Dr. Nikolaus Klepp via tde-users"
> > <users(a)trinitydesktop.org> wrote:
> > > Hi all!
> > >
> > > I just found that KPDF is (again) asking for a password on
> > > non-password-protected PDFs and fails to open the PDF if no
> > > password is given. The PDF preview in konqueror is fine. I have
> > > attached a PDF that triggers the behaviour on my system (KPDF
> > > 14.2.0~pre65-0debian13.0.0+3~a).
> > >
> > > Could somebody please verify?
> >
> > The file is encrypted, which would explain the password:
> >
> > $ pdfinfo ch32v003rm.pdf
> > Title: CH32V003RM-EN
> > Author: WCH
> > Creator: pdfFactory Pro pdffactorychina.cn
> > Producer: pdfFactory Pro 8.31 (Windows 11
> > CreationDate: Mon Mar 11 07:25:23 2024 EDT
> > Custom Metadata: no
> > Metadata Stream: no
> > Tagged: no
> > UserProperties: no
> > Suspects: no
> > Form: none
> > JavaScript: no
> > Pages: 185
> > Encrypted: yes (print:yes copy:yes change:no addNotes:yes
> > algorithm:AES-256) Page size: 595.32 x 841.92 pts (A4)
> > Page rot: 0
> > File size: 2283093 bytes
> > Optimized: no
> > PDF version: 1.7
>
> $ pdfinfo ch32v003rm.pdf
> Title: CH32V003RM-EN
> Author: WCH
> Creator: pdfFactory Pro pdffactorychina.cn
> Producer: pdfFactory Pro 8.31 (Windows 11
> CreationDate: Mon Mar 11 12:25:23 2024 CET
> Custom Metadata: no
> Metadata Stream: no
> Tagged: no
> UserProperties: no
> Suspects: no
> Form: none
> JavaScript: no
> Pages: 185
> Encrypted: yes (print:yes copy:yes change:no addNotes:yes
> algorithm:AES-256)
> Page size: 595.32 x 841.92 pts (A4)
> Page rot: 0
> File size: 2283093 bytes
> Optimized: no
> PDF version: 1.7
>
> # change the password with a 40 bit one
> $ qpdf --allow-weak-crypto --encrypt '' '' 40 -- ch32v003rm.pdf
> ch32v003rm.new.pdf
>
> $ pdfinfo ch32v003rm.new.pdf
> Title: CH32V003RM-EN
> Author: WCH
> Creator: pdfFactory Pro pdffactorychina.cn
> Producer: pdfFactory Pro 8.31 (Windows 11
> CreationDate: Mon Mar 11 12:25:23 2024 CET
> Custom Metadata: no
> Metadata Stream: no
> Tagged: no
> UserProperties: no
> Suspects: no
> Form: none
> JavaScript: no
> Pages: 185
> Encrypted: yes (print:yes copy:yes change:yes addNotes:yes
> algorithm:RC4)
> Page size: 595.32 x 841.92 pts (A4)
> Page rot: 0
> File size: 2288192 bytes
> Optimized: no
> PDF version: 1.7
>
> Now kpdf is able to open and show the file. See also:
>
https://mirror.git.trinitydesktop.org/gitea/TDE/tdegraphics/issues/29#issue…
HTH
Stefan
So this lead me to a viable solution to automatically remove those pesky
passwords:
- Place the attached programm in your path
- make it executeable
In /opt/trinity/share/applications/tde/kpdf.desktop, change the "Exec=" to
this:
Exec=decrypt-pdf %U; kpdf %U %i -caption "%c"
... Now when KPDF opens a file it will first be sanitized (if possible)
and then kpdf opens the unlocked file. Not as clean as I would like it to
be, but good enough for me :)
Nik