Re: Re[2]: [paragui-users] access restriction to theme archive

[Andrew Ford]

That would be neat, but it would be easier for him to
just encrypt his files, zip them, and decrypt them on
load.  He would have to hack paragui to support it
automatically, but at least he wouldn't have to delve
into zlib.  One possibility is to use a magic number
at the start of every encrypted file, and hack the
paragui file-reads to make them aware that they have
to use a key to decrypt the content when they see the
magic number at the start of a file.  For that matter,
it would be better to hack a version of physfs that
did the decryption mostly transparently to paragui
(you'd still have to provide a key), since then there
is only a single point that you have to change physfs.

Andrew.

--- Alexander Pipelka <address@hidden> wrote:
> PhysFS is based on zlib (at least if your loading
> from zip files).
> AFAIK, encryption is currently not supportet in
> zlib.
> 
> If you want to do something like encryption please
> contact the author of
> PhysFS <www.icculus.org/physfs>. Maybe he'd be
> interested in your ideas
> and maybe something like that gets added to PhysFS.
> 
> Alex
> 
> Am Mon, 2002-06-03 um 18.37 schrieb Andrew Ford:
> > I don't know if it's based on zlib or the info-zip
> > code (or something else).  As far as I know, zlib
> > doesn't support passwords, but I could be wrong. 
> > Depending on the support in physfs, you might be
> able
> > to add a password-aware read to physfs.  All in
> all,
> > though, I think the easier way is to encode the
> files
> > inside the zip.  Either way, you're going to be
> > picking around inside the library code.
> > 
> > Andrew.
> > 
> > --- taurus <address@hidden> wrote:
> > > Hello Andrew,
> > > 
> > > Monday, June 03, 2002, 16:38:52, you wrote:
> > > 
> > > AF> Offhand, I don't think that would be
> possible. 
> > > PhysFS
> > > AF> (used as the filesystem abstraction layer in
> > > paragui)
> > > AF> doesn't seem to support this, and the
> paragui
> > > AF> filesystem layer on top of physfs definately
> > > doesn't. 
> > > 
> > > Is it based on zlib in the lowest level?
> > > Can zlib work with password protected zips?
> > > 
> > > Kind regards,
> > >        taurus                          
> > > 
> > > address@hidden
> > > 
> > >  ->> "If you will have a megaphone, you will
> never
> > > have to be alone..."
> > > 
> > > 
> > > 
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> > >
> >
>
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> > 
> > 
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> 
> 
> 
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