all Windows 8 OEM need UEFI ?

Yeah. I was able to simply copy code over from the loader, modify it a bit and then I compiled it as a console application.

It's a test application and I don't know if it will work with all Windows 8 serials, especially ones that start with the letter N.

 

Nice. Are you going to share one day how you did it?

 

@ Daz I was just going to post this

Code:

Set WshShell = CreateObject("WScript.Shell")
MsgBox ConvertToKey(WshShell.RegRead("HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DigitalProductId"))

Function ConvertToKey(Key)
    Const KeyOffset = 52
Key(66) = Key(66) And 7
    i = 28
    Chars = "BCDFGHJKMPQRTVWXY2346789"
    Do
        Cur = 0
        x = 14
        Do
            Cur = Cur * 256
            Cur = Key(x + KeyOffset) + Cur
            Key(x + KeyOffset) = (Cur \ 24)
            Cur = Cur Mod 24
            x = x -1
        Loop While x >= 0
        i = i -1
        KeyOutput = Mid(Chars, Cur + 1, 1) & KeyOutput
If (((29 - i) Mod 6) = 0) And (i <> -1) Then
            i = i -1
        End If
If (i < 0) Then
Last = Cur
End If
    Loop While i >= 0
keypart1 = Mid(KeyOutput, 2, Last)
If (Last > 16) Then
insert = "5"
Else
insert = "N"
End If
If (WshShell.RegRead("HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\CurrentVersion") = "6.2") Then
KeyOutput = Replace(KeyOutput, keypart1, keypart1 & insert, 2, 1, 0)
End If
a = Mid(KeyOutput,1,5)
b = Mid(KeyOutput,6,5)
c = Mid(KeyOutput,11,5)
d = Mid(KeyOutput,16,5)
e = Mid(KeyOutput,21,5)
    ConvertToKey = a & "-" & b & "-" & c & "-" & d & "-" & e
End Function

 

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I broke cleaning out all the MsgBox stuff I added for debugging, updated my post with the fixed code

 

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@ Stannieman
This is edited, but I'm not sure. I don't have the other serial in use to test with.

 

I'm not using the value assigned to the key output, I'm using the raw value from the calculation for the position of N or 5.

added support for pre Win 8 and possibly for adding 5 to the last two blocks of the key (unsure about that tho)

Code:

Set WshShell = CreateObject("WScript.Shell")
MsgBox ConvertToKey(WshShell.RegRead("HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DigitalProductId"))

Function ConvertToKey(Key)
    Const KeyOffset = 52
Key(66) = Key(66) And 7
    i = 24
    Chars = "BCDFGHJKMPQRTVWXY2346789"
    Do
        Cur = 0
        x = 14
        Do
            Cur = Cur * 256
            Cur = Key(x + KeyOffset) + Cur
            Key(x + KeyOffset) = (Cur \ 24)
            Cur = Cur Mod 24
            x = x -1
        Loop While x >= 0
        i = i -1
        KeyOutput = Mid(Chars, Cur + 1, 1) & KeyOutput
If (i < 0) Then
Last = Cur
End If
    Loop While i >= 0
If (WshShell.RegRead("HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\CurrentVersion") = "6.2") Then
keypart1 = Mid(KeyOutput, 2, Last)
If (Last > 15) Then
insert = "5"
Else
insert = "N"
End If
KeyOutput = Replace(KeyOutput, keypart1, keypart1 & insert, 2, 1, 0)
End If
a = Mid(KeyOutput,1,5)
b = Mid(KeyOutput,6,5)
c = Mid(KeyOutput,11,5)
d = Mid(KeyOutput,16,5)
e = Mid(KeyOutput,21,5)
    ConvertToKey = a & "-" & b & "-" & c & "-" & d & "-" & e
End Function

 

Intesting I think the results could be more accurate than what I was playing with too.

 

Thanks! I'm not sure about the insert 5 thing it seemed natural to assume that if the insert position fell in the range of numbers
in this line

Code:

Chars = "BCDFGHJKMPQRTVWXY2346789"

that a number should be inserted, of course this could be totally wrong.

 

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@ Daz: Where did you get that code from winsetup.dll from? I have a similar problem that could be easily solved by knowing the algorithm.

 

The code I got was from MGADiag. For winsetup.dll it was noticed that it contained "23456789BCDFGHJKMNPQRTVWXYbcdfghjkmnpqrtvwxy" from a hex editor.

You should be able to drop the DLL into IDA Pro + Hex-Rays.

 

Ok but wouldn't give IDA me ASM instead of something readable?
I'll search for a C decompiler, that's going to look a bit better I think?

 

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@CODYQX4

Then you use the range 'BCDFGHJKMPQRTVWXY' instead of the range 'ABCDEFGHIJKLMNOPQRSTUVQXYZ'. The last one was what DAZ mentioned in his post. And you subtract 1 from the position?

I already was thinking about that when I changed nononsence's code.

 

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