Added method to decode an attribute with the secret for password vali…

…dation, and aliased gen_auth_response_authenticator to gen_acct_response_authenticator.

lib/radiustar/packet.rb

@@ -85,6 +85,7 @@ def gen_acct_response_authenticator(secret, request_authenticator)
       @packed = nil
       @authenticator
     end
+    alias :gen_acct_response_authenticator :gen_auth_response_authenticator
 
     def validate_acct_authenticator(secret)
       if @authenticator
@@ -120,6 +121,12 @@ def set_encoded_attribute(name, value, secret)
       @attributes[name] = Attribute.new(@dict, name, encode(value, secret))
     end
 
+    def decode_attribute(name, secret)
+      if @attributes[name]
+        decode(@attributes[name].value.to_s, secret)
+      end
+    end
+
     def pack
       attstr = ""
       @attributes.values.each do |attribute|