File size: 1,474 Bytes
5c59a6a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | import java.util.*;
class VaultDoor3 {
public static void main(String args[]) {
VaultDoor3 vaultDoor = new VaultDoor3();
Scanner scanner = new Scanner(System.in);
System.out.print("Enter vault password: ");
String userInput = scanner.next();
String input = userInput.substring("picoCTF{".length(),userInput.length()-1);
if (vaultDoor.checkPassword(input)) {
System.out.println("Access granted.");
} else {
System.out.println("Access denied!");
}
}
// Our security monitoring team has noticed some intrusions on some of the
// less secure doors. Dr. Evil has asked me specifically to build a stronger
// vault door to protect his Doomsday plans. I just *know* this door will
// keep all of those nosy agents out of our business. Mwa ha!
//
// -Minion #2671
public boolean checkPassword(String password) {
if (password.length() != 32) {
return false;
}
char[] buffer = new char[32];
int i;
for (i=0; i<8; i++) {
buffer[i] = password.charAt(i);
}
for (; i<16; i++) {
buffer[i] = password.charAt(23-i);
}
for (; i<32; i+=2) {
buffer[i] = password.charAt(46-i);
}
for (i=31; i>=17; i-=2) {
buffer[i] = password.charAt(i);
}
String s = new String(buffer);
return s.equals("jU5t_a_sna_3lpm18g947_u_4_m9r54f");
}
}
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