copy protected pdf files

[Janina Sajka]

Just to finish up the data on this question, the documentation regarding
the security bit in PDF is available at:

http://www-2.cs.cmu.edu/~dst/Adobe/Gallery/

You'll need to read a way into the page to find the relevant references.

A. R. Vener writes:
> Thanks, xpdf worked after I  edited the xpdf/pdftotext.cc file.
> 
> For anyone else who wants to do this, I also had to edit the ./Makefile to 
> remove the Splash line under the all: target and  I also
> ran ./configure  --without-freetype2.
> Finally I edited the xpdf/Makefile to remove every object in the all
> : target except pdftotext$(exe).
> After all that,  I was able to run make and  compile a working pdftotext .
> 
> Rudy
> 
> 
> On Sun, Nov 14, 2004 at 02:10:19PM +0100, Christian Schoepplein wrote:
> > Hi!
> > 
> > On Sa, Nov 13, 2004 at 04:19:20 -0500, A. R. Vener wrote:
> > > I purchased  a set of instrucional CD's which contain  some
> > > files in pdf format.
> > > 
> > > Unfortunately when I try to convert them with  pdf2txt, I get a message stating tthat the text 
> > > cannot be copied.
> > > 
> > > Once upon a time I vaguely recall hearing that there is a single bit in the pdf file
> > > that sets the copy protected  mode.
> > > Can anyone tell me if this is so and what the offset and bitmask would be?
> > 
> > I use pdftotext to get out the text of a protected pdf file. pdftotext 
> > is part of the xpdf-utils package under debian. Normaly the programm 
> > works with protected pdf files without any changes out of the box. Bbut 
> > if it not works you can edit the sources of the package and comment out 
> > an if-statement witch is responsible for the protection.
> > 
> > Hth,
> > Schoeppi
> > 
> > -- 
> > Christian Schoepplein | Alles rund ums WEB: http://www.connectweb.de
> > chris at schoeppi.net | Linux fuer Blinde: http://www.blinux.suse.de
> > 
> > _______________________________________________
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> 
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-- 
	
				Janina Sajka, Chair
				Accessibility Workgroup
				Free Standards Group (FSG)

janina at freestandards.org	Phone: +1 202.494.7040