Make session list show the encryption status

Both extended and verbose session logging will show which of the
sessions has the encryption enabled as it's not yet supported on all
sessions.

lib/msf/base/serializer/readable_text.rb

@@ -541,6 +541,7 @@ class ReadableText
     columns << 'Id'
     columns << 'Type'
     columns << 'Checkin?' if show_extended
+    columns << 'Enc?' if show_extended
     columns << 'Local URI' if show_extended
     columns << 'Information'
     columns << 'Connection'
@@ -575,6 +576,12 @@ class ReadableText
           row << '?'
         end
 
+        if session.respond_to?(:aes_key) && session.aes_key
+          row << "Y"
+        else
+          row << 'N'
+        end
+
         if session.exploit_datastore.has_key?('LURI') && !session.exploit_datastore['LURI'].empty?
           row << " (#{session.exploit_datastore['LURI']})"
         else
@@ -616,12 +623,13 @@ class ReadableText
       sess_uuid    = session.payload_uuid.to_s
       sess_puid    = session.payload_uuid.respond_to?(:puid_hex) ? session.payload_uuid.puid_hex : nil
       sess_luri    = session.exploit_datastore['LURI'] || ""
+      sess_enc     = (session.respond_to?(:aes_key) ? session.aes_key : nil) != nil
 
       sess_checkin = "<none>"
       sess_registration = "No"
 
-      if session.respond_to? :platform
-        sess_type << (" " + session.platform)
+      if session.respond_to?(:platform)
+        sess_type << " " + session.platform
       end
 
       if session.respond_to?(:last_checkin) && session.last_checkin
@@ -640,6 +648,7 @@ class ReadableText
       out << "        Info: #{sess_info}\n"
       out << "      Tunnel: #{sess_tunnel}\n"
       out << "         Via: #{sess_via}\n"
+      out << "   Encrypted: #{sess_enc}\n"
       out << "        UUID: #{sess_uuid}\n"
       out << "     CheckIn: #{sess_checkin}\n"
       out << "  Registered: #{sess_registration}\n"