好了我们来到关键地方喽：

代码:

* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0040111C(C)
|
:0040110C 0FBE840D48FFFFFF        movsx eax, byte ptr [ebp+ecx-000000B8]
:00401114 41                      inc ecx  
:00401115 33C1                    xor eax, ecx
:00401117 03D8                    add ebx, eax
:00401119 3B4DD8                  cmp ecx, dword ptr [ebp-28]
:0040111C 75EE                    jne 0040110C  

代码:

:0040111E 6BC006                  imul eax, 00000006  ;EAX其实是上面最后一轮计算的结果，乘6
:00401121 C1E307                  shl ebx, 07    ;EBX是几轮计算累加起来的结果，左移7位
:00401124 03C3                    add eax, ebx    ;加起来
:00401126 8945C8                  mov dword ptr [ebp-38], eax
:00401129 FF75C8                  push [ebp-38]    ;上面的结果，作为一个参数

* Possible StringData Ref from Data Obj ->"%lX"
                                  |
:0040112C 6838B44000              push 0040B438    ;"%lX"有点眼熟哟
:00401131 8D8D80FEFFFF            lea ecx, dword ptr [ebp+FFFFFE80]
:00401137 51                      push ecx    ;这是什么呢？
:00401138 E8873D0000              call 00404EC4
:0040113D 83C40C                  add esp, 0000000C

代码:

:00401140 8D8580FEFFFF            lea eax, dword ptr [ebp+FFFFFE80];眼熟吗，刚才的转换结果呀
:00401146 50                      push eax  ;EAX指向上面转换得到的字符串
:00401147 8D95E4FEFFFF            lea edx, dword ptr [ebp+FFFFFEE4];这个很早了，向前面找找是啥
:0040114D 52                      push edx  ;EDX指向我们输入的假注册码

* Reference To: KERNEL32.lstrcmpA, Ord:0000h
                                  |
:0040114E E8339C0000              Call 0040AD86
:00401153 85C0                    test eax, eax
:00401155 750D                    jne 00401164  ;关键跳转哟

代码:

#include <string.h>
#include <stdio.h>
#include <stdlib.h>

void main()
{
  int EAX=0,EBX=0,len;
  char name[50]={0};
  char password[50]={0};
  printf("Please input your name:");
  scanf("%s",name);
  len=strlen(name);
  for (int i=0;i<len;i++)
  {
    EAX=name[i]^(i+1);
    EBX+=EAX;
  }
  EAX*=6;
  EBX<<=7;
  EAX+=EBX;
  printf("Your password is: %lX\n",EAX);
  printf("KeyGen by RoBa  Enjoy Cracking,Newbies!\n");
}

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