rev: add a few more challenges

rev/fresh_java/decompiled.java

@@ -0,0 +1,152 @@
+// NOTE: Decompiled with JD-GUI
+
+import java.util.Scanner;
+
+public class KeygenMe {
+  public static void main(String[] paramArrayOfString) {
+    Scanner scanner = new Scanner(System.in);
+    System.out.println("Enter key:");
+    String str = scanner.nextLine();
+    if (str.length() != 34) {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(33) != '}') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(32) != '9') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(31) != '8') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(30) != 'c') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(29) != 'a') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(28) != 'c') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(27) != '8') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(26) != '3') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(25) != '7') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(24) != '_') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(23) != 'd') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(22) != '3') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(21) != 'r') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(20) != '1') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(19) != 'u') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(18) != 'q') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(17) != '3') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(16) != 'r') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(15) != '_') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(14) != 'g') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(13) != 'n') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(12) != '1') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(11) != 'l') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(10) != '0') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(9) != '0') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(8) != '7') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(7) != '{') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(6) != 'F') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(5) != 'T') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(4) != 'C') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(3) != 'o') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(2) != 'c') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(1) != 'i') {
+      System.out.println("Invalid key");
+      return;
+    }
+    if (str.charAt(0) != 'p') {
+      System.out.println("Invalid key");
+      return;
+    }
+    System.out.println("Valid key");
+  }
+}

rev/fresh_java/flag.txt

@@ -0,0 +1 @@
+picoCTF{700l1ng_r3qu1r3d_738cac89}