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/*
 * $Header: /home/cvs/jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/auth/BasicScheme.java,v 1.4.2.3 2004/02/22 18:21:14 olegk Exp $
 * $Revision: 1.4.2.3 $
 * $Date: 2004/02/22 18:21:14 $
 *
 * ====================================================================
 *
 *  Copyright 2002-2004 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 * ====================================================================
 *
 * 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
 * .
 *
 * [Additional notices, if required by prior licensing conditions]
 *
 */

package org.apache.commons.httpclient.auth;

import org.apache.commons.httpclient.HttpConstants; 
import org.apache.commons.httpclient.Credentials;
import org.apache.commons.httpclient.UsernamePasswordCredentials;
import org.apache.commons.httpclient.util.Base64; 
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * 

* Basic authentication scheme as defined in RFC 2617. *

* * @author Remy Maucherat * @author Rodney Waldhoff * @author Jeff Dever * @author Ortwin Glück * @author Sean C. Sullivan * @author Adrian Sutton * @author Mike Bowler * @author Oleg Kalnichevski */ public class BasicScheme extends RFC2617Scheme { /** Log object for this class. */ private static final Log LOG = LogFactory.getLog(BasicScheme.class); /** * Constructor for the basic authetication scheme. * * @param challenge authentication challenge * * @throws MalformedChallengeException is thrown if the authentication challenge * is malformed */ public BasicScheme(final String challenge) throws MalformedChallengeException { super(challenge); } /** * Returns textual designation of the basic authentication scheme. * * @return basic */ public String getSchemeName() { return "basic"; } /** * Produces basic authorization string for the given set of * {@link Credentials}. * * @param credentials The set of credentials to be used for athentication * @param method Method name is ignored by the basic authentication scheme * @param uri URI is ignored by the basic authentication scheme * @throws AuthenticationException if authorization string cannot * be generated due to an authentication failure * * @return a basic authorization string */ public String authenticate(Credentials credentials, String method, String uri) throws AuthenticationException { LOG.trace("enter BasicScheme.authenticate(Credentials, String, String)"); UsernamePasswordCredentials usernamepassword = null; try { usernamepassword = (UsernamePasswordCredentials) credentials; } catch (ClassCastException e) { throw new AuthenticationException( "Credentials cannot be used for basic authentication: " + credentials.getClass().getName()); } return BasicScheme.authenticate(usernamepassword); } /** * Return a basic Authorization header value for the given * {@link UsernamePasswordCredentials}. * * @param credentials The credentials to encode. * * @return a basic authorization string */ public static String authenticate(UsernamePasswordCredentials credentials) { LOG.trace("enter BasicScheme.authenticate(UsernamePasswordCredentials)"); if (credentials == null) { throw new IllegalArgumentException("Credentials may not be null"); } StringBuffer buffer = new StringBuffer(); buffer.append(credentials.getUserName()); buffer.append(":"); buffer.append(credentials.getPassword()); return "Basic " + HttpConstants.getAsciiString( Base64.encode(HttpConstants.getContentBytes(buffer.toString()))); } }
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