Fake SHSH blobs & APTickets?

Discussion in 'Jailbreaks and iOS Hacks' started by moonman239, Mar 27, 2012.

  1. moonman239 macrumors 68000

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    Mar 27, 2009
    #1
    I'm just wondering if anyone's thought of the possibility of making a fake blob and APTicket for A5 devices. If I contacted the jailbreak devs, what do you think they'd say?

    The idea is that people who don't have blobs or APTickets saved could downgrade to a jailbreakable firmware.
     
  2. Intell macrumors P6

    Intell

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    #2
    While they could be made, the iPhone wouldn't accept them as they would not be signed with Apple's private signing key.
     
  3. labman macrumors 604

    labman

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    #3
    Of course it has! :rolleyes: I'm sure it's been thought of a 1000 times but as of now it can't be done.. you can't beg barrow or steel it. unless you saved the shsh blobs yourself for that device..
     
  4. heyyitzmelissa macrumors 6502

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    #4
    If you could create fake APTickets and SHSH blobs, what would be the point of them repeatedly reminding people to save their blobs? Why not just fake them? Logic, please use it.
     
  5. thelatinist macrumors 603

    thelatinist

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    #5
    You can't create valid SHSH files without knowing Apple's private signing key.
     
  6. Applejuiced macrumors Westmere

    Applejuiced

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    #6
    My guess is they will laugh at you. :)
     
  7. labman macrumors 604

    labman

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    #7
    laugh at him then :rolleyes: and ignore is my guess!

    ----------



    Or they make him a honorary Dev and throw a parade in his honor.
     
  8. Applejuiced macrumors Westmere

    Applejuiced

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    #8
    Pretty much:D
     
  9. moonman239 thread starter macrumors 68000

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    #9
    My theory is they could compare the SHSH blobs of multiple devices with known UDID's, then figure out how to make a signed SHSH blob & APTicket.
     
  10. heyyitzmelissa macrumors 6502

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    #10
    That's how key gens work. Are you suggesting they break the law?
     
  11. Intell macrumors P6

    Intell

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    #11
    Still won't work. Apple's key is an AES 256-bit key. Trying to reverse that key would take a very long time.
     
  12. maturola macrumors 68040

    maturola

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    #12
    By the time you do that, the iPhone would be a Microship embedded on people brains that allow you to make phone call between planets. ;)
     
  13. Applejuiced macrumors Westmere

    Applejuiced

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    #13
    Wish it was that easy.
    I'm sure if it was it would be done by now but accomplishing that could take decades to figure out and come up with apples key generator sequence.
     
  14. NickNeeck macrumors newbie

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    May 13, 2012
    #14
    it can be done ofc my friend, it you can go you can also come back, but its illegal to fake the apple apticket, this is why is not public, maybe it can be done at home but you cant make it public, this is why dev team has stopped making public releases they have, it need to be legal so they can make it public, dont stop your dreams! All can be done! :D
     
  15. JZTech101, May 13, 2012
    Last edited: May 13, 2012

    JZTech101 macrumors member

    JZTech101

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    #15
    What you're thinking of is great, but there is two issues. Firstly, it is against the law to fake the SHSH blobs and Apt tickets because of the 256-bit AES key. (I apologize if this is wrong, it is just a guess).
    Secondly, the cracking process takes a long long time, unless you have a super computer far more powerful than the ones today.
     
  16. NanoNyrd macrumors regular

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    Dec 1, 2011
    #16
    It is not illegal. The only laws it would break are the laws of mathematics. But they are pretty hard to break :)

    Good cryptography is hard to bypass. Hard as in "impossible unless you have computational resources like the NSA". And probably even the NSA cannot do it.
     
  17. NanoNyrd macrumors regular

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    #17
    Just to spell out what I meant (and did not mean):

    It is impossible to fake the SHSH blobs without knowing Apples private key, and impossible to reverse-engineer the key, even for the NSA. It might be possible to break into their servers and get it that way. That would not break the laws of mathematics, but a lot of other laws :)

    And it might be possible to bypass the SHSH mechanism by somehow disabling the checks in the firmware. Difficult (otherwise it would already have been done), but I would not put it beyond the various jailbreaking teams.
     
  18. Intell macrumors P6

    Intell

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    #18
    The old bootrom 3Gs has the SHSH blobs check system bypassed. If you have one, you can put any iOS version on it. Even if you don't have the SHSH blobs for that firmware version.
     
  19. CyBeRino macrumors 6502a

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    Jun 18, 2011
    #19
    Where are you getting this nonsense?

    Even if you did, it'd take you forever because there is no known way to figure out an AES256 key other than by an exhaustive search. Which at 2^256 combinations will take you upwards of a century even on the fastest computer known to man.
     
  20. dhlizard macrumors G4

    dhlizard

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    #20
    hardly, let us know how that task works out for you !

    ----------

    Why do people keep thinking this is illegal ?
    Not illegal and not feasible.
    .
     
  21. JZTech101 macrumors member

    JZTech101

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    #21
    And I meant a super computer faster than the ones we have now.
     
  22. terraphantm macrumors 68040

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    #22
    They can be solved pretty quickly by quantum computers. Of course we don't have access to such computers (yet), but I suspect they will become common place within 20 years or so.
     
  23. Carlanga macrumors 604

    Carlanga

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    #23
    Everybody has though of it TS; the reason nobody has done it to distribute is because is ILEGAL. THE END.
     
  24. CyBeRino macrumors 6502a

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    #24
    Yeah, but I didn't want to complicate matters further.

    (Seriously though that's going to be a fun time for cryptologists.)
     
  25. Intell macrumors P6

    Intell

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    #25
    It is not illegal to decrypt Apple's private signing key and redistribute it. Look at the private key Apple uses in the Airport Express to encrypt AirTunes. It was extracted from the firmware about a year ago and reditributed on the internet. Apple has yet to sue the person who extracted it, update iTunes to blacklist that key, update the Airport Express to use a different, or anything else that even suggests that they care about that key being public. Bottom line, it is not illegal to decrypt Apple's SHSH blobs to extract the key(s) used for signing them.
     

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