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> NNTP-Posting-Host: sable.ox.ac.uk Lines: 19 To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Precedence: bulk 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 Merton College, Oxford