Re: A89: Re: How TI's keys work


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Re: A89: Re: How TI's keys work




But non-free ones don't have that restriction?  Why?

Bryan

----- Original Message -----
From: "Scott Dial" <wrath@calc.org>
To: <assembly-89@lists.ticalc.org>
Sent: Thursday, December 02, 1999 8:18 PM
Subject: 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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