Task 18.2 - echo_string/medium.rb

modules/generators/challenges/misc/programming/echo_string/secgen_local/low.rb

@@ -1,3 +1,8 @@
+# #####################
+# Programming Challenge
+# Echo string - Repeat a string and repeat back to the script
+# #####################
+
 require 'securerandom'
 require 'timeout'
 

modules/generators/challenges/misc/programming/echo_string/secgen_local/medium.rb

@@ -0,0 +1,37 @@
+# #####################
+# Programming Challenge
+# Echo string - Medium: Reverse a string and repeat it back to the script
+# #####################
+
+require 'securerandom'
+require 'timeout'
+
+$stdout.sync = true  # Disable stdout caching (for challenges that can be run over the network)
+puts 'Prepare yourself. You need to work quickly for this challenge.'
+
+sleep 2
+puts 'Echo the string back to me, in reverse, before the script times out. Try writing a script of your own to make it easier!'
+sleep 2
+puts 'Get ready, here we go...'
+sleep 2
+# Generate random string
+string = [SecureRandom.base64(rand(20..40)), SecureRandom.hex(rand(20..40))].sample
+
+puts string
+STDOUT.flush
+
+begin
+  Timeout.timeout 5 do
+    response = gets.chomp
+    if response == string.reverse
+      puts File.read('flag')
+    else
+      puts 'Incorrect answer!'
+      exit
+    end
+  end
+rescue Timeout::Error
+  puts 'Too slow!'
+  exit
+end
+

modules/generators/challenges/misc/programming/echo_string/secgen_metadata.xml

@@ -18,9 +18,9 @@
   <read_fact>difficulty</read_fact>
 
   <default_input into="difficulty">
-    <value>low</value>
-    <!--TODO: implement higher difficulty options -->
-    <!--<value>medium</value>-->
+    <!--<value>low</value>-->
+    <value>medium</value>
+    <!--TODO: implement high difficulty options -->
     <!--<value>high</value>-->
   </default_input>