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

Discussion in 'Jailbreaks and iOS Hacks' started by lPHONE, Sep 2, 2010.

  1. lPHONE macrumors 6502a

    lPHONE

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    Nov 17, 2009
    #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:
     
  2. The General macrumors 601

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    #2
    There's no way around it and your backups have nothing to do with IPSWs.
     
  3. Applejuiced macrumors Westmere

    Applejuiced

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    #3
    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.
     
  4. lPHONE thread starter macrumors 6502a

    lPHONE

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    #4
    thx ppl!

    do u think the Dev Team knows how to forge signatures?
     
  5. Applejuiced macrumors Westmere

    Applejuiced

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    #5
    Not possible.
     
  6. lPHONE thread starter macrumors 6502a

    lPHONE

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    #6
    but if I have iPhone 3G, I can still download 4.0.2 and use Blackra1n and unlock with sn0w?
     
  7. Applejuiced macrumors Westmere

    Applejuiced

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    #7

    Yes, you can JB and unlock an iphone 3G on 4.0.2
    Cant JB using blackrain though. Use redsnow or jailbreakme.com
    And unlock with ultrasnow from cydia.
     
  8. lPHONE thread starter macrumors 6502a

    lPHONE

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    #8
    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?
     
  9. Applejuiced macrumors Westmere

    Applejuiced

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    #9
    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/
     
  10. TMar macrumors 68000

    TMar

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    #10
    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.
     
  11. lPHONE thread starter macrumors 6502a

    lPHONE

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    Nov 17, 2009
    #11
    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."
     
  12. TMar macrumors 68000

    TMar

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    #12
    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..
     
  13. craziplaya21 macrumors newbie

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    Jul 24, 2008
    #13
    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.
     
  14. TMar macrumors 68000

    TMar

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    #14
    You remember incorrectly. With 4.0 came 'soft' SHSH checks for 3g devices.
     
  15. craziplaya21 macrumors newbie

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    Jul 24, 2008
    #15
    Ah ok
     
  16. nobias macrumors regular

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    Jun 23, 2010
    #16
    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.
     
  17. dhlizard macrumors G4

    dhlizard

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    #17
    OP has voices in his head.

    He is doing what those tell him and not listening to your correct advice. :eek:
     
  18. lPHONE thread starter macrumors 6502a

    lPHONE

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    #18
    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!
     
  19. Applejuiced macrumors Westmere

    Applejuiced

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    #19
    Figures. Instead he goes for 4.1
    I'm done trying to help the helpless.
     

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