crackme challenge source code - YASCON2020

main.go

/*
  Created for YASCON2020 - yetanothersec.com/yascon2020/
  by @odinshell - 15/11/20
  
  Challenge name: crackme
  Category: Reverse engineering
  Difficulty: Easy
*/

package main

import (
        "fmt"
        "os"
        "strings"
)

var array []string

func main() {
        var input string
        fmt.Print("Dead or alive? \n")
        fmt.Scan(&input)
        array := strings.Split(input, "")
        if len(input) < 10 {
                fmt.Println("umm.. not that.")
                os.Exit(1)
        }

        banner := `
                            .--.
                           (    )
                              _/
                ,   ,         |
                |\_/|_________|
                |+ +          o
                |_^_|-||_____||
                  U   ||     ||
                     (_|    (_|

                Curiosity killed the cat.
        `

        if string(array[2+1]) == "C" &&
                string(array[0]) == "Y" &&
                string(array[0+1]) == "A" &&
                string(array[7+1]) == "3" &&
                string(array[13+1]) == "_" &&
                string(array[6+1]) == "W" &&
                string(array[17+1]) == "g" &&
                string(array[14+1]) == "t" &&
                string(array[19+1]) == "_" &&
                string(array[21+1]) == "3" &&
                string(array[29+1]) == "}" &&
                string(array[3+1]) == "O" &&
                string(array[9+1]) == "c" &&
                string(array[20+1]) == "r" &&
                string(array[9+1]) == "c" &&
                string(array[1+1]) == "S" &&
                string(array[18+1]) == "O" &&
                string(array[23+1]) == "3" &&
                string(array[4+1]) == "N" &&
                string(array[8+1]) == "l" &&
                string(array[5+1]) == "{" &&
                string(array[14+1]) == "t" &&
                string(array[10+1]) == "0" &&
                string(array[12+1]) == "e" &&
                string(array[15+1]) == "0" &&
                string(array[16+1]) == "_" &&
                string(array[11+1]) == "m" &&
                string(array[22+1]) == "v" &&
                string(array[25+1]) == "s" &&
                string(array[28+1]) == "G" &&
                string(array[26+1]) == "1" &&
                string(array[24+1]) == "r" &&
                string(array[27+1]) == "n" {
                  // flag - YASCON{W3lc0me_t0_gO_r3v3rs1nG}
                  fmt.Println(banner)
                  os.Exit(0)
        } else {
                fmt.Println("Ight, imma head out.")
        }
}