Question about ACER SLIC2.1 (LOHR)

Discussion in 'Windows 7' started by halaween, Aug 7, 2009.

  1. halaween

    halaween MDL Member

    Aug 31, 2007
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    Is it right that ACER SLIC2.1 (Creator ID: LOHR) can activate WIN7 using ACER old certificate?
     
  2. Yen

    Yen Admin
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    May 6, 2007
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    AFAIK no, but you may post it here we can check for it. It must have the same pubkey than the SLIC2.0.
     
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  3. justinkb

    justinkb MDL Member

    Jul 16, 2008
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    the 2.1 acer cert you have is probably just hex edited ...
     
  4. secr9tos

    secr9tos MDL Addicted

    Jul 28, 2009
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    No 'cause I tested it on my Aspire 8920g an it didn't work. So i decided to add HP SLIC 2.1 to bios.
     
  5. TheOneAndOnly

    TheOneAndOnly MDL Junior Member

    Aug 21, 2007
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    Used the PubKeyCompare.exe 1.0.0.4 and SlicInfo.exe 1.0.0.5

    ACRSYS SLIC.jpg ACRSYS XrML.jpg

    Looks good :D
     
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  6. halaween

    halaween MDL Member

    Aug 31, 2007
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    That means it should activate win7!!!

    But i tried it on my desktop acer aspire M5640 AMI, and it fails, maybe the bios mod is not OK.

    BTW. after i flash the moded bios it gives me the Creator ID MSFT and not LOHR!!!!, i am sure i mod it with LOHR SLIC2.1, RW-Everything reported SLIC2.1
     
  7. TheOneAndOnly

    TheOneAndOnly MDL Junior Member

    Aug 21, 2007
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    It looks as if your SLIC table was never updated, it exists but its the default.
     
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  8. str8

    str8 MDL Expert

    Jul 3, 2009
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    Hey, it never occured to you that someone could just put an old public key in the new Acer 2.1 slic? Thus thinking it's good to go...BUT - as far as i know it's digitally signed and this signature contains information on both - public key and marker. If the marker or public key is changed then the signature is no longer going to have the right info and this trick is not gonna work.
     
  9. HSChronic

    HSChronic MDL Expert

    Aug 25, 2007
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    I have also tried activating with the Acer SLIC and it is not working. I don't know if it is the SLIC or the cert but it doesn't work. The SLIC on my Dell works fine so I suggest that you mod it with Dell.
     
  10. Gradius

    Gradius MDL Member

    Jul 30, 2009
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    I tried too and no joy, I'm using HP slic and works fine.

    Not in hurry now, I can wait for a real confirmed Acer 2.1 coming out (leaked).

    Gradius
     
  11. halaween

    halaween MDL Member

    Aug 31, 2007
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    When i compare the SLIC2.1 (LOHR) and the certificate provided using the AMI SLIC Tool (Andy) it give me matched certificate (see attached picture)

    But the PubKeyCompare.exe give mismatched (see attached picture)

    Now how two utilitied give different results????

    If the doubt about the moded bios here are the RW-Everything report in addition to The SLIC dump by SLIC_Dump_Toolkit.exe

    Only one thing confusing Creator ID in the moded bios is MSFT and not LOHR !!!!! how this thing come like this i donn't know.

    Any Idea?
     

    Attached Files:

  12. Yen

    Yen Admin
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    May 6, 2007
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    I'll check that...
     
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  13. Gradius

    Gradius MDL Member

    Jul 30, 2009
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    #15 Gradius, Aug 7, 2009
    Last edited: Aug 7, 2009
    You need to change MSFT to LOHR !

    Or it will NOT works.

    That LOHR thing is on RSA1 cypher too (or in cert, need to confirm).

    I know because I have to change "acer" to "HPQ " in order to work.
     
  14. Yen

    Yen Admin
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    May 6, 2007
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    Well, it has got the same pubkey as the SLIC2.0 AND A marker OA2.1 that is the same as the Marker 2.1 of the Acer SLIC that has got a new pubkey too.
    Got it? :D
    Somebody has just copied the pubkey from SLIC2.0 into the acer SLIC that needs a different certificate, in order to fool it. But he don't get that the digital signature is different!
    It must be fake!;)
     
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  15. Yen

    Yen Admin
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    May 6, 2007
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    Sorry that's wrong. LOHR is the creator ID of the SLIC header and is NOT digitally signed!
    HPQOEMSLIC-MPC needs to be the same at marker, at RSDT / XSDT table AND at SLIC header in order to activate!

    The creator ID doesn't matter.;)
     
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  16. Gradius

    Gradius MDL Member

    Jul 30, 2009
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    Well, if so, is fake.
     
  17. halaween

    halaween MDL Member

    Aug 31, 2007
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    Thank you YEN for clarification