WikiEngineCallback howto

[Schenk, Andre]

JSPWiki-Developers,

I'm in the process of writing a WikiPageProvider to our "eSciDoc" framework 
(http://www.escidoc.org/).

To access the storage backend I need credentials which I normally get as a 
cookie from a login page. Therefore I also wrote a JAAS login module that does 
this login.

Now my question is: How can I transport the credential information from the 
JAAS module to the page provider? My idea was to get the WikiEngine from a 
WikiEngineCallback and put my credential into a WikiEngine attribute. 
Unfortunately I'm not able to get a WikiEngineCallback. When trying this I 
always get a javax.security.auth.callback.UnsupportedCallbackException.

My login.config looks like:

eSciDocLogin
{
    de.escidoc.auth.jaas.eSciDocWebContainerLoginModule required
       eSciDocURL="http://localhost:8080/";
       debug=true;
};

The method login() from the LoginModule does the following:

    public boolean login() throws LoginException {
        println("login called");

        loginOk = false;

        NameCallback namecallback = new NameCallback("user name");
        PasswordCallback passwordcallback = new PasswordCallback("password", 
false);
        WikiEngineCallback wikicallback = new WikiEngineCallback();

        try {
            handler.handle(new Callback[] {namecallback, passwordcallback, 
wikicallback});
            userName = namecallback.getName();

            String password = new String(passwordcallback.getPassword());

            try {
                println("try to login user \"" + userName + "\"");
                eSciDocLoginHandler handler = new 
eSciDocLoginHandler((String)options.get(PROP_URL), userName, password);

                println("store handle: " + handler.getSecurityHandle());
                wikicallback.getEngine().setAttribute(ATTR_ESCIDOC_HANDLE, 
handler.getSecurityHandle());
                handler.logout();
                println("login successful");
                loginOk = true;
            }
            catch (Exception e) {
                println("login failed: " + e.toString());
                throw new FailedLoginException(e.toString());
            }
        }
        catch (IOException e) {
            println("login failed: " + e.toString());
            throw new LoginException(e.toString());
        }
        catch (UnsupportedCallbackException e) {
            println("login failed: " + e.toString());
            throw new LoginException("Error: " + e.getCallback().toString() + 
" not available to garner authentication information " + "from the user");
        }
        return loginOk;
    }

Could someone please give me a hint what the problem could be?

Thanks in advance!

Best regards,

André


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