Author Topic: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC  (Read 16526 times)

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Offline ruler501

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #15 on: April 13, 2011, 08:31:40 pm »
Its theoretically not impossible is what I meant. Unless there is a breakthrough in factoring -stares at Xeda- this is effectively impossible. Who knows maybe we will find another way to find the answrs we want.
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-----BEGIN GEEK CODE BLOCK-----
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GCM/CS/M/S d- s++: a---- C++ UL++ P+ L++ E---- W++ N o? K- w-- o? !M V?
PS+ PE+ Y+ PGP++ t 5? X R tv-- b+++ DI+ D+ G++ e- h! !r y

Offline Lionel Debroux

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #16 on: April 14, 2011, 02:20:50 am »
Not sure RunOS/OSLauncher requires modifying the OS :)
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Offline willrandship

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #17 on: April 14, 2011, 02:23:03 am »
Pretty darn sure all it takes is decompressing it to get a raw file. the .img isn't enough, I believe, since RunOS doesn't do extraction.

Offline DJ Omnimaga

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #18 on: April 14, 2011, 03:35:34 am »
it will rain pink flying unicorns before we can factor it.
or nethams

And I agree, I think at this point it isn't even worth it to try factoring even the 1024 bit one anymore either, since it's gonna be replaced with a 2048 one. I wouldn't be surprised if TI did that on purpose.

I guess for now we have to rely on what Lionel mentionned, which means much less free space...
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Offline Lionel Debroux

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #19 on: April 14, 2011, 03:39:28 am »
Yes, less free space, though the OS in ZIPped form is only 3-4 MB (7-9 MB for phoenix.raw, obtained from decompressing the ZIP resulting from the Blowfish decryption of the 8070 field) :)
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Offline DJ Omnimaga

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #20 on: April 14, 2011, 03:55:40 am »
Ah that's good then. I was worried about only having like 3 MB of free space, which means not even enough room to play nDoom. O.O

I wonder if it takes a long while to decompress?
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Offline Lionel Debroux

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #21 on: April 14, 2011, 05:08:10 am »
Several seconds, AFAICS.
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Offline Munchor

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #22 on: April 14, 2011, 06:21:14 am »
Its theoretically not impossible is what I meant. Unless there is a breakthrough in factoring -stares at Xeda- this is effectively impossible. Who knows maybe we will find another way to find the answrs we want.

Do you think Zeda could look at the hex and get the key using his special hex powers and maths spells? :P

Offline Lionel Debroux

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #23 on: April 14, 2011, 08:00:44 am »
We do already have the public keys - but they're too hard to factor in order to deduce the private keys.
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Offline pokemonrules9

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #24 on: April 14, 2011, 10:21:39 pm »
Hi, I'm trying to remove boot2 from my nspire.  Not being very experienced with programming, I'm having much trouble compiling TNOC.  :banghead:   Could someone please help me?

Offline Xeda112358

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #25 on: April 14, 2011, 10:24:39 pm »
Its theoretically not impossible is what I meant. Unless there is a breakthrough in factoring -stares at Xeda- this is effectively impossible. Who knows maybe we will find another way to find the answrs we want.

Do you think Zeda could look at the hex and get the key using his special hex powers and maths spells? :P
If it helps, I have been attacking primes and some prime theory. I haven't gotten anywhere that nobody else has, but I am giving it a whirl :D

EDIT: It might help if I actually understand the concept of these public and private keys... I've only been guessing in that area and I still don't understand how the method works to prevent access to stuff.

Offline Levak

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #26 on: April 14, 2011, 10:56:10 pm »
Hi, I'm trying to remove boot2 from my nspire.  Not being very experienced with programming, I'm having much trouble compiling TNOC.  :banghead:   Could someone please help me?
I guess your problem is compiling the Linux binaries ? :p
What are the errors ?
Be sure you read the HOWTOCOMPILE text file before.
« Last Edit: April 14, 2011, 10:56:38 pm by Levak »
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Offline mikehill2003

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #27 on: April 14, 2011, 11:01:15 pm »
Its theoretically not impossible is what I meant. Unless there is a breakthrough in factoring -stares at Xeda- this is effectively impossible. Who knows maybe we will find another way to find the answrs we want.

Do you think Zeda could look at the hex and get the key using his special hex powers and maths spells? :P
If it helps, I have been attacking primes and some prime theory. I haven't gotten anywhere that nobody else has, but I am giving it a whirl :D

EDIT: It might help if I actually understand the concept of these public and private keys... I've only been guessing in that area and I still don't understand how the method works to prevent access to stuff.
Don't bother -- It's impossible. (No, seriously. Not impossible like going back in time, but rather less probable then pretty much anything you can think of.)

Quote
Hi, I'm trying to remove boot2 from my nspire.  Not being very experienced with programming, I'm having much trouble compiling TNOC.  Frustrated   Could someone please help me?
TNOC dosen't need to be compiled... It comes with a binary. Assuming the previous sentence does not apply because you're using linux, where does it fail?
« Last Edit: April 14, 2011, 11:14:09 pm by mikehill2003 »

Offline ruler501

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #28 on: April 14, 2011, 11:04:48 pm »
Still its a chance if not very large that they might figure something out. I have also been wondering about this. Could someone give a comprehensive tutorial/information about how this works. Chances are almost 100% we'll find nothing but it still would be a nice interesting experience.
I currently don't do much, but I am a developer for a game you should totally try out called AssaultCube Reloaded download here https://assaultcuber.codeplex.com/
-----BEGIN GEEK CODE BLOCK-----
Version: 3.1
GCM/CS/M/S d- s++: a---- C++ UL++ P+ L++ E---- W++ N o? K- w-- o? !M V?
PS+ PE+ Y+ PGP++ t 5? X R tv-- b+++ DI+ D+ G++ e- h! !r y

Offline mikehill2003

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Re: TNOC for OS 3.0 and how to downgrade from 3.0 if you didn't use TNOC
« Reply #29 on: April 14, 2011, 11:11:28 pm »
Still its a chance if not very large that they might figure something out. I have also been wondering about this. Could someone give a comprehensive tutorial/information about how this works. Chances are almost 100% we'll find nothing but it still would be a nice interesting experience.

Look, I'm sorry to rain on the parade here, but I'm just being honest. Our time is better spent on things that can be accomplished. We can't factor the RSA key in the forseable future, unless we get quantum computers.
For an introduction to RSA, see the Wikipedia article:
http://en.wikipedia.org/wiki/RSA