On Wed, 4 Aug 2021 17:00:00 +0200 "Dr. Nikolaus Klepp" <office@xxxxxxxxx> wrote: > Anno domini 2021 Wed, 4 Aug 09:09:54 -0400 > E. Liddell scripsit: > > On Wed, 04 Aug 2021 12:04:16 +0200 > > deloptes <emanoil.kotsev@xxxxxxxxxxxx> wrote: > > > > > Dr. Nikolaus Klepp wrote: > > > > > > > Hi all! > > > > > > > > Giving this PDF https://www.farnell.com/datasheets/2304760.pdf kpdf > > > > requires a password to open it while firefox does not. > > > > > > > > Anybody knows the reason for this? > > > > > > > > Nik > > > > > > > confirmed > > > Here kpdf requested access to kwallet - I rejected and it asked for passwd. > > > FF is not asking for passwd > > > > > > perhaps strace to see what is happening? > > > > For what it's worth, the file shows as encrypted (and slightly broken): > > > > ~ $ pdfinfo 2304760.pdf > > Internal Error: xref num 27 not found but needed, try to reconstruct<0a> > > Tagged: no > > UserProperties: no > > Suspects: no > > Form: none > > JavaScript: no > > Pages: 8 > > Encrypted: yes (print:yes copy:no change:no addNotes:yes algorithm:AES-256) > > Page size: 612 x 792 pts (letter) > > Page rot: 0 > > File size: 1626771 bytes > > Optimized: no > > PDF version: 1.4 > > > > It might be that the original creators of kpdf didn't anticipate the possible > > existence of encrypted files that weren't password-locked. Or it could be that > > the file breakage is causing other problems. > > Thanks for the hint, now I kind of solved it by uploading the PDF to https://smallpdf.com , let it remove the password and saving the result :) > > But what I still don't understand: why was the preview in konqueror showing the first page of the pdf? Does KPDF not use the same component to as konqueror? No clue. I don't think the encryption/password system for PDFs is very strong, though. Poppler (the package that contains the pdfinfo command I used) can break it in order to perform PDF conversions (without knowing the password), so other packages may be able to do so as well. E. Liddell ____________________________________________________ tde-users mailing list -- users@xxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxx Web mail archive available at https://mail.trinitydesktop.org/mailman3/hyperkitty/list/users@xxxxxxxxxxxxxxxxxx
