jaasmemoryloginmodule.java

This temp directory is used by the JVM for temporary file storage. The JVM is configured to use thi

            committed = false;
            principal = null;
        }
        log.debug("Abort");
        return (true);

    }


    /**
     * Phase 2 of authenticating a <code>Subject</code> when Phase 1
     * was successful.  This method is called if the <code>LoginContext</code>
     * succeeded in the overall authentication chain.
     *
     * @return <code>true</code> if the authentication succeeded, or
     *  <code>false</code> if this <code>LoginModule</code> should be
     *  ignored
     *
     * @exception LoginException if the commit fails
     */
    public boolean commit() throws LoginException {
        log.debug("commit " + principal);

        // If authentication was not successful, just return false
        if (principal == null)
            return (false);

        // Add our Principal to the Subject if needed
        if (!subject.getPrincipals().contains(principal))
            subject.getPrincipals().add(principal);

        committed = true;
        return (true);

    }

    
    /**
     * Return the SecurityConstraints configured to guard the request URI for
     * this request, or <code>null</code> if there is no such constraint.
     *
     * @param request Request we are processing
     * @param context Context the Request is mapped to
     */
    public SecurityConstraint [] findSecurityConstraints(HttpRequest request,
                                                     Context context) {
        ArrayList results = null;
        // Are there any defined security constraints?
        SecurityConstraint constraints[] = context.findConstraints();
        if ((constraints == null) || (constraints.length == 0)) {
            if (debug)
                log("  No applicable constraints defined");
            return (null);
        }

        // Check each defined security constraint
        HttpServletRequest hreq = (HttpServletRequest) request.getRequest();
        String uri = request.getDecodedRequestURI();
        String contextPath = hreq.getContextPath();
        if (contextPath.length() > 0)
            uri = uri.substring(contextPath.length());
        uri = RequestUtil.URLDecode(uri); // Before checking constraints
        String method = hreq.getMethod();
        for (int i = 0; i < constraints.length; i++) {
            if (debug)
                log("  Checking constraint '" + constraints[i] +
                    "' against " + method + " " + uri + " --> " +
                    constraints[i].included(uri, method));
            if (constraints[i].included(uri, method)) {
                if(results == null) {
                    results = new ArrayList();
                }
                results.add(constraints[i]);
            }
        }

        // No applicable security constraint was found
        if (debug)
            log("  No applicable constraint located");
        if(results == null)
            return null;
        SecurityConstraint [] array = new SecurityConstraint[results.size()];
        System.arraycopy(results.toArray(), 0, array, 0, array.length);
        return array;
    }
    
    
    /**
     * Initialize this <code>LoginModule</code> with the specified
     * configuration information.
     *
     * @param subject The <code>Subject</code> to be authenticated
     * @param callbackHandler A <code>CallbackHandler</code> for communicating
     *  with the end user as necessary
     * @param sharedState State information shared with other
     *  <code>LoginModule</code> instances
     * @param options Configuration information for this specific
     *  <code>LoginModule</code> instance
     */
    public void initialize(Subject subject, CallbackHandler callbackHandler,
                           Map sharedState, Map options) {
        log.debug("Init");

        // Save configuration values
        this.subject = subject;
        this.callbackHandler = callbackHandler;
        this.sharedState = sharedState;
        this.options = options;

        // Perform instance-specific initialization
        this.debug = "true".equalsIgnoreCase((String) options.get("debug"));
        if (options.get("pathname") != null)
            this.pathname = (String) options.get("pathname");

        // Load our defined Principals
        load();

    }


    /**
     * Phase 1 of authenticating a <code>Subject</code>.
     *
     * @return <code>true</code> if the authentication succeeded, or
     *  <code>false</code> if this <code>LoginModule</code> should be
     *  ignored
     *
     * @exception LoginException if the authentication fails
     */
    public boolean login() throws LoginException {

        // Set up our CallbackHandler requests
        if (callbackHandler == null)
            throw new LoginException("No CallbackHandler specified");
        Callback callbacks[] = new Callback[2];
        callbacks[0] = new NameCallback("Username: ");
        callbacks[1] = new PasswordCallback("Password: ", false);

        // Interact with the user to retrieve the username and password
        String username = null;
        String password = null;
        try {
            callbackHandler.handle(callbacks);
            username = ((NameCallback) callbacks[0]).getName();
            password =
                new String(((PasswordCallback) callbacks[1]).getPassword());
        } catch (IOException e) {
            throw new LoginException(e.toString());
        } catch (UnsupportedCallbackException e) {
            throw new LoginException(e.toString());
        }

        // Validate the username and password we have received
        principal = super.authenticate(username, password);

        log.debug("login " + username + " " + principal);

        // Report results based on success or failure
        if (principal != null) {
            return (true);
        } else {
            throw new
                FailedLoginException("Username or password is incorrect");
        }

    }


    /**
     * Log out this user.
     *
     * @return <code>true</code> in all cases because thie
     *  <code>LoginModule</code> should not be ignored
     *
     * @exception LoginException if logging out failed
     */
    public boolean logout() throws LoginException {

        subject.getPrincipals().remove(principal);
        committed = false;
        principal = null;
        return (true);

    }


    // ---------------------------------------------------------- Realm Methods
    // ------------------------------------------------------ Protected Methods


    /**
     * Load the contents of our configuration file.
     */
    protected void load() {

        // Validate the existence of our configuration file
        File file = new File(pathname);
        if (!file.isAbsolute())
            file = new File(System.getProperty("catalina.base"), pathname);
        if (!file.exists() || !file.canRead()) {
            log("Cannot load configuration file " + file.getAbsolutePath());
            return;
        }

        // Load the contents of our configuration file
        Digester digester = new Digester();
        digester.setValidating(false);
        digester.addRuleSet(new MemoryRuleSet());
        try {
            digester.push(this);
            digester.parse(file);
        } catch (Exception e) {
            log("Error processing configuration file " +
                file.getAbsolutePath(), e);
            return;
        }

    }
}