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So apparently, Apple stopped signing _______ ispw firmware (or whatever)

lPHONE

lPHONE

macrumors 6502a
Original poster
Nov 17, 2009
671
1
1. OK, so Apple stopped signing 4.01 and 3.1.2 so stop "teh evil h4x0rs" from jailbreaking and unlocking their iPhones. OK, I get that but is there anyway to get around this?

I know, I know, I know... In one way, shape, or form I am not asking the right question or it's already been answert, but seriously- has Apple always signed the firmware? Because the voices in my head are telling me to try an older version of iTunes? I thought I'd check with you guys first. :cool:


2. Also, I just remembered that I have an old ISPW backup with important data on it. Does this mean that I will never see it again because Apple won't sign the firmware? :rolleyes:
 
Yes, they stopped signing 4.0.1 weeks ago.
And no, if you dont have SHSH's saved locally or on cydia there is no way around this.
Downgrading itunes would do nothing either.
And you dont have an old ipsw backup, if you have a backup saved thru itunes you can restore to it at any time.
IPSW's are just firmware files with no user data in them at all.
 
thx ppl!

do u think the Dev Team knows how to forge signatures?
 
but if I have iPhone 3G, I can still download 4.0.2 and use Blackra1n and unlock with sn0w?
 
Applejuiced said:
Not possible.
Click to expand...

Thanks again Applejuiced,

the jailbreakme.com site told me "Welp. Version too new. you need to downgrade to 4.0.1." but how can I do that if Apple doesn't sign 4.0.1?
I read on and the guy says he can trick iTunes into pointing to cydia instead of Apple and do what he calls "bypassing the overlord" which I presume is essentially forging the signatures?
 
lPHONE said:
Thanks again Applejuiced,

the jailbreakme.com site told me "Welp. Version too new. you need to downgrade to 4.0.1." but how can I do that if Apple doesn't sign 4.0.1?
I read on and the guy says he can trick iTunes into pointing to cydia instead of Apple and do what he calls "bypassing the overlord" which I presume is essentially forging the signatures?
Click to expand...

Im sorry, you're right.
I forgot Apple patched the pdf exploit with 4.0.2
No, its not forging signatures, the user has its SHSH signatures saved on cydia and then redirects the check onto cydias server and thats how he can downgrade. If you dont have your previous firmwares shsh's saved on cydia it still will not go thru.
Folow this guide to JB an iphone 3G on 4.0.2 using redsnow:
http://www.iphonedownloadblog.com/2010/08/11/jailbreak-unlock-ios-4-0-2-on-iphone-3g/
 
lPHONE said:
Thanks again Applejuiced,

the jailbreakme.com site told me "Welp. Version too new. you need to downgrade to 4.0.1." but how can I do that if Apple doesn't sign 4.0.1?
I read on and the guy says he can trick iTunes into pointing to cydia instead of Apple and do what he calls "bypassing the overlord" which I presume is essentially forging the signatures?
Click to expand...

You can't 'forge' signatures, cydia does nothing but saves copies of the signature from apple for use at a later time. The signatures are device and firmware specific. To forge them you would either need to breaking into Apple HQ and steal their encryption key or you could book a couple of decades on a supercomputer to crack it.
 
Thank you all for clarifying all this up.
Too bad I have now bricked the iPhone.
I cannot even get it to restore to 4.1 in DFU mode. It keeps giving me error 21.

I wonder if this's Apple's way of saying, "Thanks for playing Jailbreak. Game Over."
 
lPHONE said:
Thank you all for clarifying all this up.
Too bad I have now bricked the iPhone.
I cannot even get it to restore to 4.1 in DFU mode...

I wonder if this's Apple's way of saying, "Thanks for playing Jailbreak. Game Over."
Click to expand...

Short of hardware failure there is no such thing as a 'bricked' iphone..

EDIT: Why are your in DFU and why are you trying to put 4.1 on it? Or do you mean 4.0.1? If you want it JB then install 4.0.2 and redsn0w..
 
He's using a 3G. If I remember correctly, he could've just downgraded to 4.0.1 without any problems because 3G does not need signing. Then, just JB with the site.
 
craziplaya21 said:
He's using a 3G. If I remember correctly, he could've just downgraded to 4.0.1 without any problems because 3G does not need signing. Then, just JB with the site.
Click to expand...

You remember incorrectly. With 4.0 came 'soft' SHSH checks for 3g devices.
 
Saving shsh and rerouting authentication is called a replay attack. Google it.
One cannot "replay" without intercepting (saving) the first occurrence, which is what cydia does, but it must occur while apple is still signing the relevant firmware.
 
TMar said:
Short of hardware failure there is no such thing as a 'bricked' iphone..

EDIT: Why are your in DFU and why are you trying to put 4.1 on it? Or do you mean 4.0.1? If you want it JB then install 4.0.2 and redsn0w..
Click to expand...

It's stuck on the apple logo and the spinning wheel is frozen. I tried 4.1 because none of the other firmwares will restore!
 
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