Make ACPP login work

lib/rex/proto/acpp/client.rb

@@ -21,8 +21,7 @@ class Client
     login.type = 20
     @sock.put(login.to_s)
     # TODO: the checksum never validates here
-    resp =  Message.decode(@sock.get_once(128), false)
-    return resp.type == login.type && resp.status == 0
+    Message.decode(@sock.get_once(128), false)
   end
 end
 end

lib/rex/proto/acpp/message.rb

@@ -90,6 +90,10 @@ module ACPP
       @unknown4 = ''
     end
 
+    def successful?
+      @status == 0
+    end
+
     # Get this Message as a String
     #
     # @return [String] the string representation of this Message

modules/auxiliary/scanner/acpp/login.rb

@@ -38,6 +38,8 @@ class Metasploit3 < Msf::Auxiliary
         Opt::RPORT(5009),
       ], self.class)
 
+    deregister_options(%w(USERNAME USER_FILE USER_AS_PASS))
+
     register_autofilter_ports([5009])
   end
 
@@ -50,7 +52,7 @@ class Metasploit3 < Msf::Auxiliary
         password: datastore['PASSWORD'],
         user_file: datastore['USER_FILE'],
         userpass_file: datastore['USERPASS_FILE'],
-        username: datastore['USERNAME'],
+        username: '<BLANK>',
         user_as_pass: datastore['USER_AS_PASS']
     )