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Author Topic: New Nspire OS 2.1.1  (Read 15656 times)

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Offline DJ Omnimaga

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Re: New Nspire OS 2.1.1
« Reply #15 on: May 02, 2011, 05:54:28 pm »
Now I wonder how long will it take for them to re-release OS 3.0... let's hope it doesn't hide anything suspicious. I think if they pull a stunt against programmers again, then it's easily gonna land on Slashdot.
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Offline Twerty

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Re: New Nspire OS 2.1.1
« Reply #16 on: May 02, 2011, 07:50:52 pm »
I'd imagine TI released this version as a sort of attempt to cover their asses, so it seems that they're releasing "new" stuff that doesn't brick peoples' calculators, heh.
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Offline ralphdspam

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Re: New Nspire OS 2.1.1
« Reply #17 on: May 02, 2011, 10:09:48 pm »
Hrm...  This is very TI but still very odd.  I do not understand why they would take a step back like this.  :\
* ralphdspam still wants a CX, though.
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Offline Goplat

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Re: New Nspire OS 2.1.1
« Reply #18 on: May 02, 2011, 11:28:08 pm »
I notice that in the .tno they included a file called keys.bin. It's part of a Windows program (don't know what program, since it's incomplete) with all the 0x00 bytes replaced with 0x20 bytes. As far as I can tell, its only purpose is to waste 11,264 bytes of space.

Edit: For anyone who wants to disassemble it: start address is 0x404C92. The whole thing seems to be just C library functions.
« Last Edit: May 02, 2011, 11:58:42 pm by Goplat »
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Offline DJ Omnimaga

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Re: New Nspire OS 2.1.1
« Reply #19 on: May 02, 2011, 11:31:22 pm »
Hmm, I am curious what kind of use this might have...
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Offline calc84maniac

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Re: New Nspire OS 2.1.1
« Reply #20 on: May 03, 2011, 12:32:49 am »
It would be hilarious if that contained the RSA keys :P
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Offline jnesselr

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Re: New Nspire OS 2.1.1
« Reply #21 on: May 03, 2011, 07:16:26 am »
Goplat is almost at 200 posts!  And it might contain the public keys, but nothing ever released will ever contain the private keys.
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Offline critor

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Re: New Nspire OS 2.1.1
« Reply #22 on: May 03, 2011, 08:24:15 am »
Quote from: graphmastur on May 03, 2011, 07:16:26 am
Goplat is almost at 200 posts!  And it might contain the public keys, but nothing ever released will ever contain the private keys.

But this file is absent from every other Nspire OS, including the CAS 2.1.1 OS and the 3.0.1 OSes.

It's a windows program which has nothing to do with the Nspire hardware...


So it seems to have been included by mistake in the basic 2.1.1 OS. And thinking that it might contain the private keys is not stupid.
« Last Edit: May 03, 2011, 08:24:46 am by critor »
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Offline Lionel Debroux

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Re: New Nspire OS 2.1.1
« Reply #23 on: May 03, 2011, 09:32:10 am »
At least, the keys are not in plain sight. As Goplat wrote, the whole file seems to be made of x86 ASM.
Maybe it's directed at replacing chunks of an x86 version of Phoenix, such as the one found in the computer software ?
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Offline Deep Toaster

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Re: New Nspire OS 2.1.1
« Reply #24 on: May 03, 2011, 09:34:44 am »
Quote from: yeongJIN_COOL on May 02, 2011, 11:26:47 am
lol.... OS 2.1.1 when OS 3.0 already came out...(and disappear)
Way to go, TI.

Which you can't even use now that you've upgraded and can't downgrade anymore. Way to go XD
« Last Edit: May 03, 2011, 09:35:02 am by Deep Thought »
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Offline Goplat

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Re: New Nspire OS 2.1.1
« Reply #25 on: May 03, 2011, 11:58:43 am »
Quote from: Lionel Debroux on May 03, 2011, 09:32:10 am
At least, the keys are not in plain sight. As Goplat wrote, the whole file seems to be made of x86 ASM.
Maybe it's directed at replacing chunks of an x86 version of Phoenix, such as the one found in the computer software ?
It can't actually be executed, because 0x00 bytes were replaced with spaces. (Incidentally, this is exactly what Windows Notepad does if you open a binary file in it.)

Also, the executable this was taken from is a small one, with at most 32kB of code; you can see it calling imported functions with address 4090xx, so that's the start of the read-only data section, and the entire code section would be from 401000-408FFF.
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Offline Dingus

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Re: New Nspire OS 2.1.1
« Reply #26 on: May 03, 2011, 08:59:09 pm »
Quote from: DJ_O on May 02, 2011, 05:54:28 pm
Now I wonder how long will it take for them to re-release OS 3.0... let's hope it doesn't hide anything suspicious. I think if they pull a stunt against programmers again, then it's easily gonna land on Slashdot.

What is Slashdot?
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Offline willrandship

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Re: New Nspire OS 2.1.1
« Reply #27 on: May 03, 2011, 10:30:41 pm »
News site.

Keep in mind, OS signing stuff is pretty small. it could fit in 32 kb. Heck, wabbitsign is only 38 kb!
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Offline ruler501

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Re: New Nspire OS 2.1.1
« Reply #28 on: May 03, 2011, 10:48:39 pm »
The private key would at most be about 2 kb. I doubt TI would be stupid enough to release the private key though. the public key might have been released though(thought we already had it though...)
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Offline willrandship

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Re: New Nspire OS 2.1.1
« Reply #29 on: May 03, 2011, 10:49:14 pm »
well, it's possible. I mean, the public key itself was a big accident.

And don't forget OS 0.41 (43?) I don't remember, the one with printing. :P
« Last Edit: May 03, 2011, 10:49:50 pm by willrandship »
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