/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.catalina.realm;
import java.io.IOException;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.TextInputCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import org.apache.tomcat.util.res.StringManager;
/**
* <p>Implementation of the JAAS <code>CallbackHandler</code> interface,
* used to negotiate delivery of the username and credentials that were
* specified to our constructor. No interaction with the user is required
* (or possible).</p>
*
* <p>This <code>CallbackHandler</code> will pre-digest the supplied
* password, if required by the <code><Realm></code> element in
* <code>server.xml</code>.</p>
* <p>At present, <code>JAASCallbackHandler</code> knows how to handle callbacks of
* type <code>javax.security.auth.callback.NameCallback</code> and
* <code>javax.security.auth.callback.PasswordCallback</code>.</p>
*
* @author Craig R. McClanahan
* @author Andrew R. Jaquith
* @version $Id: JAASCallbackHandler.java 939305 2010-04-29 13:43:39Z kkolinko $
*/
public class JAASCallbackHandler implements CallbackHandler {
// ------------------------------------------------------------ Constructor
/**
* Construct a callback handler configured with the specified values.
* Note that if the <code>JAASRealm</code> instance specifies digested passwords,
* the <code>password</code> parameter will be pre-digested here.
*
* @param realm Our associated JAASRealm instance
* @param username Username to be authenticated with
* @param password Password to be authenticated with
*/
public JAASCallbackHandler(JAASRealm realm, String username,
String password) {
super();
this.realm = realm;
this.username = username;
if (realm.hasMessageDigest()) {
this.password = realm.digest(password);
}
else {
this.password = password;
}
}
/**
* Construct a callback handler for DIGEST authentication.
*
* @param realm Our associated JAASRealm instance
* @param username Username to be authenticated with
* @param password Password to be authenticated with
* @param nonce Server generated nonce
* @param nc Nonce count
* @param cnonce Client generated nonce
* @param qop Quality of protection applied to the message
* @param realmName Realm name
* @param md5a2 Second MD5 digest used to calculate the digest
* MD5(Method + ":" + uri)
* @param authMethod The authentication method in use
*/
public JAASCallbackHandler(JAASRealm realm, String username,
String password, String nonce, String nc,
String cnonce, String qop, String realmName,
String md5a2, String authMethod) {
this(realm, username, password);
this.nonce = nonce;
this.nc = nc;
this.cnonce = cnonce;
this.qop = qop;
this.realmName = realmName;
this.md5a2 = md5a2;
this.authMethod = authMethod;
}
// ----------------------------------------------------- Instance Variables
/**
* The string manager for this package.
*/
protected static final StringManager sm =
StringManager.getManager(Constants.Package);
/**
* The password to be authenticated with.
*/
protected String password = null;
/**
* The associated <code>JAASRealm</code> instance.
*/
protected JAASRealm realm = null;
/**
* The username to be authenticated with.
*/
protected String username = null;
/**
* Server generated nonce.
*/
protected String nonce = null;
/**
* Nonce count.
*/
protected String nc = null;
/**
* Client generated nonce.
*/
protected String cnonce = null;
/**
* Quality of protection applied to the message.
*/
protected String qop;
/**
* Realm name.
*/
protected String realmName;
/**
* Second MD5 digest.
*/
protected String md5a2;
/**
* The authentication method to be used. If null, assume BASIC/FORM.
*/
protected String authMethod;
// --------------------------------------------------------- Public Methods
/**
* Retrieve the information requested in the provided <code>Callbacks</code>.
* This implementation only recognizes {@link NameCallback},
* {@link PasswordCallback} and {@link TextInputCallback}.
* {@link TextInputCallback} is used to pass the various additional
* parameters required for DIGEST authentication.
*
* @param callbacks The set of <code>Callback</code>s to be processed
*
* @exception IOException if an input/output error occurs
* @exception UnsupportedCallbackException if the login method requests
* an unsupported callback type
*/
public void handle(Callback callbacks[])
throws IOException, UnsupportedCallbackException {
for (int i = 0; i < callbacks.length; i++) {
if (callbacks[i] instanceof NameCallback) {
if (realm.getContainer().getLogger().isTraceEnabled())
realm.getContainer().getLogger().trace(sm.getString("jaasCallback.username", username));
((NameCallback) callbacks[i]).setName(username);
} else if (callbacks[i] instanceof PasswordCallback) {
final char[] passwordcontents;
if (password != null) {
passwordcontents = password.toCharArray();
} else {
passwordcontents = new char[0];
}
((PasswordCallback) callbacks[i]).setPassword
(passwordcontents);
} else if (callbacks[i] instanceof TextInputCallback) {
TextInputCallback cb = ((TextInputCallback) callbacks[i]);
if (cb.getPrompt().equals("nonce")) {
cb.setText(nonce);
} else if (cb.getPrompt().equals("nc")) {
cb.setText(nc);
} else if (cb.getPrompt().equals("cnonce")) {
cb.setText(cnonce);
} else if (cb.getPrompt().equals("qop")) {
cb.setText(qop);
} else if (cb.getPrompt().equals("realmName")) {
cb.setText(realmName);
} else if (cb.getPrompt().equals("md5a2")) {
cb.setText(md5a2);
} else if (cb.getPrompt().equals("authMethod")) {
cb.setText(authMethod);
} else {
throw new UnsupportedCallbackException(callbacks[i]);
}
} else {
throw new UnsupportedCallbackException(callbacks[i]);
}
}
}
}