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__int64 __fastcall main(int a1, char **a2, char **a3)
{
  char s[264]; // [rsp+0h] [rbp-110h] BYREF
  unsigned __int64 v5; // [rsp+108h] [rbp-8h]

  v5 = __readfsqword(0x28u);
  printf("Enter the password: ");
  if ( !fgets(s, 255, stdin) )
    return 0;
  if ( (unsigned int)sub_4006FD(s) )
  {
    puts("Incorrect password!");
    return 1;
  }
  else
  {
    puts("Nice!");
    return 0;
  }
}

查看加密 要求每一位减去a1[i] 要 == 1 所以我们要去

__int64 __fastcall sub_4006FD(__int64 a1)
{
  int i; // [rsp+14h] [rbp-24h]
  _QWORD v3[4]; // [rsp+18h] [rbp-20h]

  v3[0] = "Dufhbmf";
  v3[1] = "pG`imos";
  v3[2] = "ewUglpt";
  for ( i = 0; i <= 11; ++i )
  {
    if ( *(char *)(v3[i % 3] + 2 * (i / 3)) - *(char *)(i + a1) != 1 )
      return 1;
  }
  return 0;
}

exp

v3 = [0] * 3

v3[0] = "Dufhbmf"
v3[1] = "pG`imos"
v3[2] = "ewUglpt"

for i in range(12):
    char = v3[i % 3][2 * (i // 3)]
    print(chr(ord(char) - 1), end="")

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