From:	mert0407 AT sable DOT ox DOT ac DOT uk (George Foot)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Allegro: Password protecting DATAFILE
Date:	11 Oct 1997 17:25:51 GMT
Organization:	Oxford University, England
Message-ID:	<61ocqv$li3$3@news.ox.ac.uk>
References:	<61oa8h$9vg$2 AT news DOT interlog DOT com>
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To:	djgpp AT delorie DOT com
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Gautam N. Lad (gautam AT interlog DOT com) wrote:
: This may be one of the dumbest question, but is there any way to password 
: protect Allegro's DATAFILE (.DAT) so that if a user of my program has 
: DJGPP and Allegro fully installed, tries to open up my program's .DAT file, it 
: would ask for a password (which is stored in the .DAT file).
: I mean, they can hack the Grabber program to by-pass the password (if 
: possible), but is something like this possible, hopefully in the future (or is it 
: already available in v3.x)?

It's already available. The encryption system is not particularly secure; 
anyone with the source to your program could of course find out what the
password is. I think it's a WIP feature, though. You call a function to
set a password, and then all subsequent packfile functions (including
datafile accesses) use that password. The grabber and dat utility both
support this too.

-- 
George Foot <mert0407 AT sable DOT ox DOT ac DOT uk>
Merton College, Oxford

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