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/*
* ====================================================================
* 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.
* ====================================================================
*
* 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/>.
*
*/
package ch.boye.httpclientandroidlib.impl.client;
import java.security.Principal;
import javax.net.ssl.SSLSession;
import ch.boye.httpclientandroidlib.HttpConnection;
import ch.boye.httpclientandroidlib.annotation.Immutable;
import ch.boye.httpclientandroidlib.auth.AuthScheme;
import ch.boye.httpclientandroidlib.auth.AuthState;
import ch.boye.httpclientandroidlib.auth.Credentials;
import ch.boye.httpclientandroidlib.client.UserTokenHandler;
import ch.boye.httpclientandroidlib.client.protocol.HttpClientContext;
import ch.boye.httpclientandroidlib.conn.ManagedHttpClientConnection;
import ch.boye.httpclientandroidlib.protocol.HttpContext;
/**
* Default implementation of {@link UserTokenHandler}. This class will use
* an instance of {@link Principal} as a state object for HTTP connections,
* if it can be obtained from the given execution context. This helps ensure
* persistent connections created with a particular user identity within
* a particular security context can be reused by the same user only.
* <p>
* DefaultUserTokenHandler will use the user principle of connection
* based authentication schemes such as NTLM or that of the SSL session
* with the client authentication turned on. If both are unavailable,
* <code>null</code> token will be returned.
*
* @since 4.0
*/
@Immutable
public class DefaultUserTokenHandler implements UserTokenHandler {
public static final DefaultUserTokenHandler INSTANCE = new DefaultUserTokenHandler();
public Object getUserToken(final HttpContext context) {
final HttpClientContext clientContext = HttpClientContext.adapt(context);
Principal userPrincipal = null;
final AuthState targetAuthState = clientContext.getTargetAuthState();
if (targetAuthState != null) {
userPrincipal = getAuthPrincipal(targetAuthState);
if (userPrincipal == null) {
final AuthState proxyAuthState = clientContext.getProxyAuthState();
userPrincipal = getAuthPrincipal(proxyAuthState);
}
}
if (userPrincipal == null) {
final HttpConnection conn = clientContext.getConnection();
if (conn.isOpen() && conn instanceof ManagedHttpClientConnection) {
final SSLSession sslsession = ((ManagedHttpClientConnection) conn).getSSLSession();
if (sslsession != null) {
userPrincipal = sslsession.getLocalPrincipal();
}
}
}
return userPrincipal;
}
private static Principal getAuthPrincipal(final AuthState authState) {
final AuthScheme scheme = authState.getAuthScheme();
if (scheme != null && scheme.isComplete() && scheme.isConnectionBased()) {
final Credentials creds = authState.getCredentials();
if (creds != null) {
return creds.getUserPrincipal();
}
}
return null;
}
}
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