[keygenme] Pretty Easy :)

[ante0]

My very first Keygenme made in delphi 7 (I know, I should learn some more ASM).

Just make a keygen for it.

Also, it's packed with UPX 2.03w but with nothing else, so unpacking should be easy

Post keygen when you're done.

KeyGenMe_byAnte0.rar

[ChupaChu]

yes its easy..

i hope i coded it correctly..

BR, ChupaChu!

ante_kgn_by_ChupaChu.zip

[ante0]

Hehe, It was my first attempt on making a licensed application.

Could be good training for complete beginners though

[IMPosTOR]

befor call

check the serial lenght.

must <= 10

function IMPosTOR_keygen(serial : string):string;
var EAX : integer;
begin
 result := '';
 EAX:= strtoint(serial);
 asm
  ADD EAX,EAX
  ADD EAX,$1B3
  SHL EAX,$2
  ADD EAX,$38
  LEA ESI,DWORD PTR DS:[EAX+EAX*4]
  LEA ESI,DWORD PTR DS:[ESI+ESI*8]
  ADD ESI,$16F
 end;
 result :=inttostr(EAX);
end;

[ante0]

befor call

check the serial lenght.

must <= 10

function IMPosTOR_keygen(serial : string):string;
var EAX : integer;
begin
 result := '';
 EAX:= strtoint(serial);
 asm
  ADD EAX,EAX
  ADD EAX,$1B3
  SHL EAX,$2
  ADD EAX,$38
  LEA ESI,DWORD PTR DS:[EAX+EAX*4]
  LEA ESI,DWORD PTR DS:[ESI+ESI*8]
  ADD ESI,$16F
 end;
 result :=inttostr(EAX);
end;

Good

I made a new one, should be a little more complicated...

I will hide the serial better next time, right now the algro is very easy to find. lol

And yes Chupa, you did it all right

Edited November 19, 2007 by ante0

[ChupaChu]

@Ante, i learn keygening when i catch time, i tought your keygenme was a keyfile me, that i did not coded yet so i figured why not trying it.. but it was no keyfile, nice work

@Impostor: why not make it simple:

SERIAL:=360*UNLOCK+81187

[Encrypto]

hmm.. seems that i am a bit late.

lol..

thank you for the challenge Ante0

KeyGen.By.Encrypto.zip

[ante0]

@Ante, i learn keygening when i catch time, i tought your keygenme was a keyfile me, that i did not coded yet so i figured why not trying it.. but it was no keyfile, nice work

@Impostor: why not make it simple:

SERIAL:=360*UNLOCK+81187

Hehe, they gen.key file only contains a valid Pass+Unlockkey (And Name, just so it can say "Registered to Name"), though, it checks if it's valid on start.

Should be pretty easy to crack too

Hmm. How would the function IntToHex look like in ASM?

Hehe

@Encrypto: Glad you liked it

Edited November 19, 2007 by ante0

[IMPosTOR]

@Ante, i learn keygening when i catch time, i tought your keygenme was a keyfile me, that i did not coded yet so i figured why not trying it.. but it was no keyfile, nice work

@Impostor: why not make it simple:

SERIAL:=360*UNLOCK+81187

um.. i want use asm in delphi .

so other coder (noob like me) see and learn how we can just copy

and pase asm code in delphi then use .

[ChupaChu]

IMHO its a good idea to add pushad and popad in inline asm statement.

asm
pushad
  mov eax,a
  ADD	 EAX, EAX
  ADD	 EAX, $1B3
  SHL	 EAX, $2
  ADD	 EAX, $38
  LEA	 ESI, DWORD PTR DS:[EAX+EAX*4]
  LEA	 ESI, DWORD PTR DS:[ESI+ESI*8]
  ADD	 ESI, $16F
  MOV	 ser,ESI
popad
end;

this way one will awoid possible problems when using more complicated asm codes inline..

@Encrypto: Nice to see you code keygens now.. Keep it up!

Also its always a good idea to check for boundarie conditions; e.g. 0 as unlock code, or if value that is final result is used in signed or unsigned form.. when i talk about it, i missed last part so i'm reuploading my keygen, as old-one is displaying results in unsigned form, and Ante0's proggy uses signed values as input, so in some cases my keygen wont work allthough hex values are correct

ante_kgn_by_ChupaChu.zip

BR, ChupaChu!

Edited November 19, 2007 by ChupaChu

[ante0]

IMHO its a good idea to add pushad and popad in inline asm statement.

asm
pushad
  mov eax,a
  ADD	 EAX, EAX
  ADD	 EAX, $1B3
  SHL	 EAX, $2
  ADD	 EAX, $38
  LEA	 ESI, DWORD PTR DS:[EAX+EAX*4]
  LEA	 ESI, DWORD PTR DS:[ESI+ESI*8]
  ADD	 ESI, $16F
  MOV	 ser,ESI
popad
end;

this way one will awoid possible problems when using more complicated asm codes inline..

@Encrypto: Nice to see you code keygens now.. Keep it up!

Also its always a good idea to check for boundarie conditions; e.g. 0 as unlock code, or if value that is final result is used in signed or unsigned form.. when i talk about it, i missed last part so i'm reuploading my keygen, as old-one is displaying results in unsigned form, and Ante0's proggy uses signed values as input, so in some cases my keygen wont work allthough hex values are correct

ante_kgn_by_ChupaChu.zip

BR, ChupaChu!

Ah, this is good to know

Hope my next one will be harder for you to keygen