Re: A89: Re: How TI's keys work
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Re: A89: Re: How TI's keys work
Your about on my nerves... RTFW (W = Website), free apps don't have to
be signed, but they are limited to 8k
Bryan Rabeler wrote:
>
> Well, the "Are they crazy?" bit was directed more along the lines of is this
> their plan to stop us from making games? But since apps aren't meant for
> games, I see your point. Although if this 8kb limit is really true, thats a
> real pain.
>
> Bryan
>
> ----- Original Message -----
> From: "mhlandry" <mhlandry@bellsouth.net>
> To: <assembly-89@lists.ticalc.org>
> Sent: Thursday, December 02, 1999 7:27 PM
> Subject: Re: A89: Re: How TI's keys work
>
> >
> > TI may be crazy, but they were pretty smart when they came up with
> > this application bit. They will not sign any applications unless you
> > buy the Educational version (limited amoutn of signs) or the
> > Professional version (unlimited). As someone previously said, (I think
> > SMN) the signing is based on these certificates. You get a certificate
> > with your calculators information, specifically the serial number (I
> > think). Then they make the app so that it will run on a calculator with
> > one specified serial number.
> > As to you question "Are they crazy?", No. Apps were not meant for
> > games, but for professional software that could be developed by
> > professionals (several professors with PHD's were on the sdk beta team)
> > and sold to schools and the such. Although apps can be used for games.
> > Hope this will clear things up.
> >
> > P.S - Someone please correct me if I was wrong on anything (*cough* Dan
> > E. *cough*)
> >
> > - Matt
> >
> > Bryan Rabeler wrote:
> > >
> > > So are you saying that in genereal, TI won't sign apps if you wrote them
> > > using the free SDK? Are they crazy? Do they want to stop us from
> making
> > > games altogether?
> > >
> > > Bryan
> > >
> > > ----- Original Message -----
> > > From: "Scott Noveck" <noveck@pluto.njcc.com>
> > > To: <assembly-89@lists.ticalc.org>
> > > Sent: Thursday, December 02, 1999 4:14 PM
> > > Subject: A89: How TI's keys work
> > >
> > > >
> > > > Judging by the 83+ SDK beta, you guys are all waaaaay off.
> > > >
> > > > First of all, the way app signing works is different from what you've
> > > > described. The application itself is just modified to tell the calc
> that
> > > it
> > > > requires some "certificate(s)" to run. The certificates are what has
> to
> > > be
> > > > generated specifically for each serial number, and THESE are heavily
> > > > encrypted. And I doubt you'll get anything at all out of that.
> > > >
> > > > Second, TI does NOT just sign any app you send them. Normally,
> they'll
> > > only
> > > > do it for those who BUY the SDK - for all other purposes, the free SDK
> is
> > > > just a listing of ROM addresses. The 83+ apps out now - like
> calcsys -
> > > were
> > > > signed because TI has given us SDK beta testers the opportunity to get
> an
> > > > app signed for our work -- actually a fair decision on their part.
> > > >
> > > > Also, the serial number on any HW1 calc can be changed. The whole
> reason
> > > > HW2 was released is to fix the security bug allowing ROM modification
> on
> > > old
> > > > calcs. FYI, it's the same bug Archive Utility uses, and although no
> one's
> > > > tried yet the address is known (I've seen it somewhere) and it COULD
> > > > theoretically be done.
> > > >
> > > > -Scott
> > > >
> > > >
> > > >
> >
> >
--
Scott "_Wrath_" Dial
wrath@calc.org
ICQ#3608935
TimeCity AI Guy II - www.timecity.org
Member of TCPA - tcpa.calc.org
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