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Author Topic: TI-NSpire Operative Systems  (Read 9130 times)

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Offline ruler501

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Re: TI-NSpire Operative Systems
« Reply #15 on: February 27, 2011, 03:19:12 pm »
It prevents editing unless you know it. i must find out what it is
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Offline shrear

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Re: TI-NSpire Operative Systems
« Reply #16 on: February 27, 2011, 03:56:10 pm »
Quote from: Scout on February 27, 2011, 03:18:22 pm
"The OS is signed with a 1024-bit key"

In the middle of the .tno fiel code is a key? Sorry I understand what it does, just not what it is.

I think the RSA key is explained pretty well here
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Offline Deep Toaster

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Re: TI-NSpire Operative Systems
« Reply #17 on: February 27, 2011, 04:05:23 pm »
Quote from: Stefan Bauwens on February 27, 2011, 03:18:59 pm
Quote from: Scout on February 27, 2011, 03:16:58 pm
@Stefen: Yup.
Ok, thanks.
(It isn't stefEn, it's stefan actually) :P

Edit: How can changing the 'name' of the os, change the os.

He didn't change the filename -- he actually changed the name string stored as data in the OS itself. The entire OS is summed and signed.
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Offline DJ Omnimaga

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Re: TI-NSpire Operative Systems
« Reply #18 on: February 28, 2011, 03:58:23 am »
Quote from: apcalc on February 27, 2011, 03:12:15 pm
The only way you will be able to "edit" the OS file is through an Ndless program on the calc.  As far as I have tested (not all that much, but a bit), some of the files will reject editing (or will be overwritten with the "correct" copy, or something like that is happening).
Like Compu's 1337 mod, right? http://ourl.ca/9159
« Last Edit: February 28, 2011, 03:59:24 am by DJ_O »
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Offline Munchor

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Re: TI-NSpire Operative Systems
« Reply #19 on: February 28, 2011, 09:06:41 am »
Quote from: shrear on February 27, 2011, 03:56:10 pm
Quote from: Scout on February 27, 2011, 03:18:22 pm
"The OS is signed with a 1024-bit key"

In the middle of the .tno fiel code is a key? Sorry I understand what it does, just not what it is.

I think the RSA key is explained pretty well here

Thanks.
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