【原创】代码反编译的示例程序

前一段时间，有个朋友让我帮他逆向一个东西，抠出其中的代码，存储为汇编的文件，VC下编译运行。

汇编文件的代码：
                .686p
                .model flat,c
        option casemap : none
        
        extern sprintf:proc
        extern strcat:proc
                
.data
               ___security_cookie dd 0BB40E64Eh
               a02x_0 db "%02X"
   
.code  
         public      sub_40B444    
         
sub_40B444        proc near                ; CODE XREF: sub_40CCEA+A4p

;Source                = byte ptr -14h
;var_4                = dword        ptr -4
;arg_0                = dword        ptr  8
;arg_4                = dword        ptr  0Ch
;arg_8                = dword        ptr  10h

                push        ebp
                mov        ebp, esp
                sub        esp, 14h
                mov        eax, dword ptr ___security_cookie ; "N鍬?
                xor        eax, ebp
                mov        [ebp-4], eax
                push        ebx
                mov        ebx, [ebp+8]
                push        esi
                mov        esi, [ebp+10h]
                push        edi
                xor        edi, edi
                cmp        [ebp+0Ch], edi
                mov        byte ptr [esi],        0
                jbe        short loc_40B48E

loc_40B467:                                ; CODE XREF: sub_40B444+48j
                movzx        eax, byte ptr [ebx+edi]
                push        eax
                lea        eax, [ebp-14h]
                push        offset a02x_0        ; "%02X"
                push        eax                ; Dest
                call        sprintf
                lea        eax, [ebp-14h]
                push        eax                ; Source
                push        esi                ; Dest
                call        strcat
                add        esp, 14h
                inc        edi
                cmp        edi, [ebp+0Ch]
                jb        short loc_40B467

loc_40B48E:                                ; CODE XREF: sub_40B444+21j
                mov        ecx, [ebp-4]
                pop        edi
                pop        esi
                xor        ecx, ebp
                leave
                retn
sub_40B444        endp

end

示例代码如下：
#include "stdafx.h"
#include <Windows.h>

extern "C" {
        char* sub_40B444(char*,int,char*);
}


int _tmain(int argc, _TCHAR* argv[])
{
        char* pszBuf = new char[1024];
        memset( pszBuf , 0 , 1024 );
        strcpy_s( pszBuf , 1024 , "des:" );
        sub_40B444( "你总是说我在，这样孤单时候，才能想起与你联络" , strlen("你总是说我在，这样孤单时候，才能想起与你联络") , pszBuf );
        printf_s( "format string : %s\n" , "你总是说我在，这样孤单时候，才能想起与你联络" );
        printf_s( "format string : %s\n" , pszBuf );

       if( pszBuf != NULL )
        {
           delete[]pszBuf;
           pszBuf = NULL;
        }
        return 0;
}

在此，记录一下，做个标记.