/*
 * $Header: /home/cvs/jakarta-tomcat-catalina/catalina/src/share/org/apache/catalina/authenticator/SingleSignOnEntry.java,v 1.1 2003/11/24 16:46:56 remm Exp $
 * $Revision: 1.1 $
 * $Date: 2003/11/24 16:46:56 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999-2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
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 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 * [Additional notices, if required by prior licensing conditions]
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 */
package org.apache.catalina.authenticator;

import java.security.Principal;

import org.apache.catalina.Session;
import org.apache.catalina.authenticator.Constants;

/**
 * A class that represents entries in the cache of authenticated users.
 * This is necessary to make it available to
 * <code>AuthenticatorBase</code> subclasses that need it in order to perform
 * reauthentications when SingleSignOn is in use.
 *
 * @author  B Stansberry, based on work by Craig R. McClanahan
 * @version $Revision: 1.1 $
 *
 * @see SingleSignOn
 * @see AuthenticatorBase#reauthenticateFromSSO
 */
class SingleSignOnEntry
{
    // ------------------------------------------------------  Instance Fields

    private String authType = null;

    private String password = null;

    private Principal principal = null;

    private Session sessions[] = new Session[0];

    private String username = null;

    private boolean canReauthenticate = false;

    // ---------------------------------------------------------  Constructors

    /**
     * Creates a new SingleSignOnEntry
     *
     * @param principal the <code>Principal</code> returned by the latest
     *                  call to <code>Realm.authenticate</code>.
     * @param authType  the type of authenticator used (BASIC, CLIENT-CERT,
     *                  DIGEST or FORM)
     * @param username  the username (if any) used for the authentication
     * @param password  the password (if any) used for the authentication
     */
    SingleSignOnEntry(Principal principal, String authType,
                        String username, String password) {        
        super();
        updateCredentials(principal, authType, username, password);
    }

    // ------------------------------------------------------- Package Methods

    /**
     * Adds a <code>Session</code> to the list of those associated with
     * this SSO.
     *
     * @param sso       The <code>SingleSignOn</code> valve that is managing
     *                  the SSO session.
     * @param session   The <code>Session</code> being associated with the SSO.
     */
    synchronized void addSession(SingleSignOn sso, Session session) {
        for (int i = 0; i < sessions.length; i++) {
            if (session == sessions[i])
                return;
        }
        Session results[] = new Session[sessions.length + 1];
        System.arraycopy(sessions, 0, results, 0, sessions.length);
        results[sessions.length] = session;
        sessions = results;
        session.addSessionListener(sso);
    }

    /**
     * Removes the given <code>Session</code> from the list of those
     * associated with this SSO.
     *
     * @param session  the <code>Session</code> to remove.
     */
    synchronized void removeSession(Session session) {
        Session[] nsessions = new Session[sessions.length - 1];
        for (int i = 0, j = 0; i < sessions.length; i++) {
            if (session == sessions[i])
                continue;
            nsessions[j++] = sessions[i];
        }
        sessions = nsessions;
    }

    /**
     * Returns the <code>Session</code>s associated with this SSO.
     */
    synchronized Session[] findSessions() {
        return (this.sessions);
    }

    /**
     * Gets the name of the authentication type originally used to authenticate
     * the user associated with the SSO.
     *
     * @return "BASIC", "CLIENT-CERT", "DIGEST", "FORM" or "NONE"
     */
    String getAuthType() {
        return (this.authType);
    }

    /**
     * Gets whether the authentication type associated with the original
     * authentication supports reauthentication.
     *
     * @return  <code>true</code> if <code>getAuthType</code> returns
     *          "BASIC" or "FORM", <code>false</code> otherwise.
     */
    boolean getCanReauthenticate() {
        return (this.canReauthenticate);
    }

    /**
     * Gets the password credential (if any) associated with the SSO.
     *
     * @return  the password credential associated with the SSO, or
     *          <code>null</code> if the original authentication type
     *          does not involve a password.
     */
    String getPassword() {
        return (this.password);
    }

    /**
     * Gets the <code>Principal</code> that has been authenticated by
     * the SSO.
     */
    Principal getPrincipal() {
        return (this.principal);
    }

    /**
     * Gets the username provided by the user as part of the authentication
     * process.
     */
    String getUsername() {
        return (this.username);
    }


    /**
     * Updates the SingleSignOnEntry to reflect the latest security
     * information associated with the caller.
     *
     * @param principal the <code>Principal</code> returned by the latest
     *                  call to <code>Realm.authenticate</code>.
     * @param authType  the type of authenticator used (BASIC, CLIENT-CERT,
     *                  DIGEST or FORM)
     * @param username  the username (if any) used for the authentication
     * @param password  the password (if any) used for the authentication
     */
    void updateCredentials(Principal principal, String authType,
                String username, String password) {

        this.principal = principal;
        this.authType = authType;
        this.username = username;
        this.password = password;
        this.canReauthenticate =
            (Constants.BASIC_METHOD.equals(authType)
                || Constants.FORM_METHOD.equals(authType));
    }

}
