Method for getting/setting hashed password in QAuthenticator

Part of my program requires users logging on to a server with a username and password. This is done currently with QHttp and QAuthenticator. I've setup the default username and let the user enter the password. It would be nice if I could save and restore the default password but saving/setting this string in unencryped form would be a huge security hole. It would be nice if QHttp/QAuthenticator provided a means to get/set the hashed version of the username or password. Alternatively, can you suggest a better approach using the existing QHttp/QAuthenticator API?