------------------[Artur Dend's CrackMe 2]------------>

Crackme: Artut Dends' s Crackme2 

Autor:Evilcry
E-Mail:evilcry@virgilio.it
Site: http://abcd6.interfree.it
Chan: #cryptorev


00401101  push  offset unk_403080   ;Address buffer of name
00401106  push  0BB8h
0040110B  push  [ebp+arg_0]
0040110E  call  j_GetDlgItemTextA
00401113  mov   esi, eax         ;Mov lenght of name in ESI
00401115  lea   eax, [ecx]
00401117  cmp   esi, 5           ;Check if the name is smaller the  5 chars
0040111A  jge   short loc_401134 ;If name is Greater than 5, let' s continue;
0040111C  push  40h              ;Else Error!!
0040111E  push  offset aError
00401123  push  offset aError 
00401128     push  [ebp+arg_0]
0040112B     call   j_MessageBoxA
00401130     xor    eax, eax
00401132     jmp    short locret_401174
00401134 ; ---------------------------------------------------------------------------
00401134 
00401134 loc_401134:                    
00401134     push    14h
00401136    push    offset unk_403280     ;Address buffer of serial
0040113B    push    0BB9h
00401140    push   [ebp+arg_0]
00401143    call  j_GetDlgItemTextA
00401148    mov  eax, offset unk_403080 ;Move in eax address's  name
0040114D    mov  ebx, offset unk_403280 ;move in ebx  the address's serial
00401152    mov     ecx, esi             ;Move in ecx lenght of name
-------------------------------------------------------------- 
00401154 loc_401154:                            
00401154     mov   dl, [eax]     ;Point to the name' s field
00401156     sub   dl, cl        ;Subtract the char with the lenght of name' s field
00401158     cmp   [ebx], dl        ;If not equals, Beggar_Off.....
0040115A     jnz   short locret_401174
0040115C     inc   eax             ;incrase name's pointer
0040115D     inc   ebx            ;incrase serial's pointer
0040115E     loop   loc_401154    ;Loop until the name is finished 
00401160     push   40h
00401162     push   offset aArturdentsCrac     ; "ArturDents CrackMe#2"
00401167     push   offset aYeahYouDidIt     ; "Yeah, you did it!"
0040116C     push   [ebp+arg_0]
0040116F     call   j_MessageBoxA


First, sorry for my bad english :)).
Cm' s routine is very simple,the characters of name inserted, are subtracted with the lenght of name' field.


Byezzz