Add level5

And reword some parts

content/secu_logicielle/td9-hackme/files/level5.py

@@ -0,0 +1,13 @@
+#!/bin/env python3
+import sys
+
+password = sys.argv[1]
+if len(password) < 3:
+    print('Minimal password size: 3, get {}'.format(len(password)))
+    sys.exit(1)
+xor=0
+target=0x43
+for letter in password:
+    xor=xor^ord(letter)
+last_letter=xor^target
+print("here is your password: {}{}".format(password,chr(last_letter)))