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@xxxxxxxxxxxxxxxxxx> 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-1614 > > 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 -- Please do not email me anything that you are not comfortable also sharing with the NSA, CIA ...
#!/bin/bash if [ $# -lt 1 ]; then echo "$(basename $0) PDF [PDF [...]]" echo "removes password and restrictions on PDF file" which qpdf || echo "you need to install 'qpdf' to make it working." exit 1 fi while [ $# -gt 0 ]; do if [ -f "$1" ]; then if [ $(qpdf --show-encryption --password='' "$1"|wc -l) -gt 1 ]; then qpdf --password='' --decrypt --remove-restrictions --replace-input "$1" echo "$1" fi fi shift done
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