Safe Opener 2

Safe Opener 2

100 points

AUTHOR: MUBARAK MIKAIL

Description What can you do with this file? I forgot the key to my safe but this file is supposed to help me with retrieving the lost key. Can you help me unlock my safe?


Using an online java decompiler like this one we get the following code:

import java.io.IOException;
import java.util.Base64;
import java.io.Reader;
import java.io.BufferedReader;
import java.io.InputStreamReader;

// 
// Decompiled by Procyon v0.5.36
// 

public class SafeOpener
{
    public static void main(final String[] args) throws IOException {
        final BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in));
        final Base64.Encoder encoder = Base64.getEncoder();
        String encodedkey = "";
        String key = "";
        for (int i = 0; i < 3; ++i) {
            System.out.print("Enter password for the safe: ");
            key = keyboard.readLine();
            encodedkey = encoder.encodeToString(key.getBytes());
            System.out.println(encodedkey);
            final boolean isOpen = openSafe(encodedkey);
            if (isOpen) {
                break;
            }
            System.out.println("You have  " + (2 - i) + " attempt(s) left");
        }
    }

    public static boolean openSafe(final String password) {
        final String encodedkey = "picoCTF{SAf3_0p3n3rr_y0u_solv3d_it_b427942b}";
        if (password.equals(encodedkey)) {
            System.out.println("Sesame open");
            return true;
        }
        System.out.println("Password is incorrect\n");
        return false;
    }
}

and so the flag is:

picoCTF{your flag}