45 lines
1.4 KiB
Java
45 lines
1.4 KiB
Java
import java.util.*;
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class VaultDoor3 {
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public static void main(String args[]) {
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VaultDoor3 vaultDoor = new VaultDoor3();
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Scanner scanner = new Scanner(System.in);
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System.out.print("Enter vault password: ");
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String userInput = scanner.next();
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String input = userInput.substring("picoCTF{".length(),userInput.length()-1);
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if (vaultDoor.checkPassword(input)) {
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System.out.println("Access granted.");
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} else {
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System.out.println("Access denied!");
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}
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}
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// Our security monitoring team has noticed some intrusions on some of the
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// less secure doors. Dr. Evil has asked me specifically to build a stronger
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// vault door to protect his Doomsday plans. I just *know* this door will
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// keep all of those nosy agents out of our business. Mwa ha!
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//
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// -Minion #2671
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public boolean checkPassword(String password) {
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if (password.length() != 32) {
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return false;
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}
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char[] buffer = new char[32];
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int i;
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for (i=0; i<8; i++) {
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buffer[i] = password.charAt(i);
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}
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for (; i<16; i++) {
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buffer[i] = password.charAt(23-i);
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}
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for (; i<32; i+=2) {
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buffer[i] = password.charAt(46-i);
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}
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for (i=31; i>=17; i-=2) {
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buffer[i] = password.charAt(i);
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}
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String s = new String(buffer);
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return s.equals("jU5t_a_sna_3lpm11g54e_u_4_m4r042");
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}
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}
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