include 'win32ax.inc'
.data
buffer rb 100
.code
start:
stdcall StrReverse,kk,buffer
invoke MessageBox,0,buffer,kk,0
leave
ret
kk: db "Estoy cifrado",0
proc StrReverse,cCadena,cBuffer
push ebx esi edi eax ecx
mov ebx, [cCadena]
mov esi,[cBuffer]
stdcall Len,ebx
mov ecx,eax
mov al,byte[ebx]
dec ecx
mov edi,0
.bucle:
mov ah,byte[ebx+ecx]
mov byte[esi+edi],ah
inc edi
dec ecx
jecxz .salir
jmp .bucle
.salir:
mov byte[esi+edi],al
mov byte[esi+edi+1],0
pop ecx eax edi esi ebx
ret
endp
proc Len , SRC
push ecx edi
mov ecx,-1
mov edi,[SRC]
mov al,0
repnz scasb
mov eax,ecx
not eax
dec eax
pop edi ecx
ret
endp
.end start
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