「reversing」タグの記事が16件件あります

void main(int argc,char **argv,char **envp)

{
  int local_54;
  int local_50;
  char *local_48;
  long local_40;
  long local_38;
  long local_30;
  
  megaInit();
  local_30 = 9;
  _global_argv = argv;
  _global_argc = argc;
  _global_envp = envp;
  do {
    switch(local_30) {
    case 0:
      local_50 = 2;
      local_30 = 0xb;
      break;
    case 2:
      local_30 = _1_main_flag_func_0(local_38,-1,0x10,5);
      break;
    case 5:
      if (local_50 == 6) {
        local_30 = 0x12;
      }
      else {
        local_30 = 8;
      }
      break;
    case 6:
      if (local_40 == 0) {
        local_30 = 0;
      }
      else {
        local_30 = 0xb;
      }
      break;
    case 8:
      fwrite("prease not trace me...\n",1,0x17,stderr);
                    /* WARNING: Subroutine does not return */
      exit(1);
    case 9:
      local_54 = 0;
      local_30 = 10;
      break;
    case 10:
      switch(local_54) {
      case 0:
        local_30 = 0x16;
        break;
      case 1:
        local_30 = 0xf;
        break;
      case 2:
        local_30 = 0x13;
        break;
      case 3:
        local_30 = 0x14;
        break;
      case 4:
        local_30 = 0x11;
        break;
      case 5:
        local_30 = 0x15;
        break;
      default:
        local_30 = 0x12;
      }
      break;
    case 0xb:
      local_38 = ptrace(PTRACE_TRACEME,0,1,0);
      local_30 = 2;
      break;
    case 0xf:
      local_48 = (char *)malloc(0x10);
      local_30 = 0x12;
      break;
    case 0x10:
      local_50 = local_50 * 3;
      local_30 = 5;
      break;
    case 0x11:
      puts("flag decrypted. bye.");
      local_30 = 0x12;
      break;
    case 0x12:
      local_54 = local_54 + 1;
      local_30 = 10;
      break;
    case 0x13:
      generate_key(local_48);
      local_30 = 0x12;
      break;
    case 0x14:
      rc4(e,local_48);
      local_30 = 0x12;
      break;
    case 0x15:
                    /* WARNING: Subroutine does not return */
      exit(0);
    case 0x16:
      local_50 = 0;
      local_40 = ptrace(PTRACE_TRACEME,0,1,0);
      local_30 = 6;
    }
  } while( true );
}

ulong main(int argc,char **argv)
{
  long *plVar1;
  int *keys;
  long in_FS_OFFSET;
  int local_24;
  long local_20;
  
  local_20 = *(long *)(in_FS_OFFSET + 0x28);
  if (argc < 4) {
    __printf_chk(1,"Usage: %s [qr] [key] [output]\n",*argv);
  }
  else {
    puts("[+] Loading QR...");
    plVar1 = (long *)LoadQr(&local_24,argv[1]); // fun_400980
    puts("[+] Done!");
    puts("[+] Loading key...");
    keys = LoadKey(argv[2]);    // fun_400af0
    puts("[+] Done!");
    puts("[+] Encrypting...");
    Encrypt((long)plVar1,keys); // fun_400c35
    puts("[+] Done!");
    puts("[+] Saving encrypted QR...");
    Output(plVar1,local_24,argv[3]);    // 400ca0
    puts("[+] Done!");
  }
  if (local_20 == *(long *)(in_FS_OFFSET + 0x28)) {
    return (ulong)(argc < 4);
  }
                    /* WARNING: Subroutine does not return */
  __stack_chk_fail();
}

void Encrypt(long param_1,int *param_2)
{
  long *y_o;
  long *y_p;
  int d;
  int y;
  long x_o;
  int x;
  long x_p;
  int iVar1;
  
  do {
    if (param_2 == (int *)0x0) {
      return;
    }
    d = param_2[2];
    x = *param_2;
    x_o = (long)x;
    y = param_2[1];
    iVar1 = y;
    if (d == 1) {
      x = x + 1;
    }
    else {
      if (d < 2) {
        if (d == 0) {
          x = x + -1;
        }
        else {
LAB_00400c70:
          iVar1 = y;
        }
      }
      else {
        if (d == 2) {
          iVar1 = y + -1;
        }
        else {
          iVar1 = y + 1;
          if (d != 3) goto LAB_00400c70;
        }
      }
    }
    y_o = (long *)(param_1 + (long)y * 8);
    x_p = (long)x;
    y_p = (long *)(param_1 + (long)iVar1 * 8);
    *(char *)(*y_o + x_o) = *(char *)(*y_o + x_o) + *(char *)(*y_p + x_p);
    *(char *)(*y_p + x_p) = *(char *)(*y_o + x_o) - *(char *)(*y_p + x_p);
    *(char *)(x_o + *y_o) = *(char *)(x_o + *y_o) - *(char *)(*y_p + x_p);
    param_2 = *(int **)(param_2 + 4);
  } while( true );
}