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vault-door-4/VaultDoor4.java

@@ -0,0 +1,45 @@
+import java.util.*;
+
+class VaultDoor4 {
+    public static void main(String args[]) {
+        VaultDoor4 vaultDoor = new VaultDoor4();
+        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!");
+        }
+    }
+
+    // I made myself dizzy converting all of these numbers into different bases,
+    // so I just *know* that this vault will be impenetrable. This will make Dr.
+    // Evil like me better than all of the other minions--especially Minion
+    // #5620--I just know it!
+    //
+    //  .:::.   .:::.
+    // :::::::.:::::::
+    // :::::::::::::::
+    // ':::::::::::::'
+    //   ':::::::::'
+    //     ':::::'
+    //       ':'
+    // -Minion #7781
+    public boolean checkPassword(String password) {
+        byte[] passBytes = password.getBytes();
+        byte[] myBytes = {
+            106 , 85  , 53  , 116 , 95  , 52  , 95  , 98  ,
+            0x55, 0x6e, 0x43, 0x68, 0x5f, 0x30, 0x66, 0x5f,
+            0142, 0131, 0164, 063 , 0163, 0137, 0143, 061 ,
+            '9' , '4' , 'f' , '7' , '4' , '5' , '8' , 'e' ,
+        };
+        for (int i=0; i<32; i++) {
+            if (passBytes[i] != myBytes[i]) {
+                return false;
+            }
+        }
+        return true;
+    }
+}

vault-door-4/sol.py

@@ -0,0 +1,14 @@
+#!/home/maxime/.pyvenv/bin/python3
+
+row_1 = [106 , 85  , 53  , 116 , 95  , 52  , 95  , 98]
+row_2 = [0x55, 0x6e, 0x43, 0x68, 0x5f, 0x30, 0x66, 0x5f]
+row_3 = [0o142, 0o131, 0o164, 0o63 , 0o163, 0o137, 0o143, 0o61]
+row_4 = ['9' , '4' , 'f' , '7' , '4' , '5' , '8' , 'e']
+
+print(''.join(
+    list(map(lambda a: chr(a), row_1)) +
+    list(map(lambda a: chr(a), row_2)) + 
+    list(map(lambda a: chr(a), row_3)) +
+    row_4
+))
+