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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.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.ClientContext;
import ch.boye.httpclientandroidlib.conn.HttpRoutedConnection;
import ch.boye.httpclientandroidlib.protocol.ExecutionContext;
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 Object getUserToken(final HttpContext context) {
Principal userPrincipal = null;
AuthState targetAuthState = (AuthState) context.getAttribute(
ClientContext.TARGET_AUTH_STATE);
if (targetAuthState != null) {
userPrincipal = getAuthPrincipal(targetAuthState);
if (userPrincipal == null) {
AuthState proxyAuthState = (AuthState) context.getAttribute(
ClientContext.PROXY_AUTH_STATE);
userPrincipal = getAuthPrincipal(proxyAuthState);
}
}
if (userPrincipal == null) {
HttpRoutedConnection conn = (HttpRoutedConnection) context.getAttribute(
ExecutionContext.HTTP_CONNECTION);
if (conn.isOpen()) {
SSLSession sslsession = conn.getSSLSession();
if (sslsession != null) {
userPrincipal = sslsession.getLocalPrincipal();
}
}
}
return userPrincipal;
}
private static Principal getAuthPrincipal(final AuthState authState) {
AuthScheme scheme = authState.getAuthScheme();
if (scheme != null && scheme.isComplete() && scheme.isConnectionBased()) {
Credentials creds = authState.getCredentials();
if (creds != null) {
return creds.getUserPrincipal();
}
}
return null;
}
}
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