/*
* 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.karaf.jaas.command;
import java.io.IOException;
import java.security.PrivilegedExceptionAction;
import javax.security.auth.Subject;
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.UnsupportedCallbackException;
import javax.security.auth.login.LoginContext;
import org.apache.karaf.shell.api.action.Action;
import org.apache.karaf.shell.api.action.Argument;
import org.apache.karaf.shell.api.action.Command;
import org.apache.karaf.shell.api.action.Option;
import org.apache.karaf.shell.api.action.lifecycle.Reference;
import org.apache.karaf.shell.api.action.lifecycle.Service;
import org.apache.karaf.shell.api.console.Session;
import org.apache.karaf.shell.support.ShellUtil;
import org.apache.karaf.util.jaas.JaasHelper;
@Command(scope = "jaas", name = "su", description = "Substitute user identity")
@Service
public class SuCommand implements Action {
@Option(name = "--realm")
String realm = "karaf";
@Argument(description = "Name of the user to substitute")
String user = "karaf";
@Reference
Session session;
@Override
public Object execute() throws Exception {
Subject subject = new Subject();
LoginContext loginContext = new LoginContext(realm, subject, new CallbackHandler() {
public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
for (Callback callback : callbacks) {
if (callback instanceof NameCallback) {
((NameCallback) callback).setName(user);
} else if (callback instanceof PasswordCallback) {
String password = SuCommand.this.session.readLine("Password: ", '*');
((PasswordCallback) callback).setPassword(password.toCharArray());
} else {
throw new UnsupportedCallbackException(callback);
}
}
}
});
loginContext.login();
JaasHelper.doAs(subject, new PrivilegedExceptionAction<Object>() {
public Object run() throws InterruptedException {
final Session newSession = session.getFactory().create(
System.in, System.out, System.err, SuCommand.this.session.getTerminal(), null, null);
Object oldIgnoreInterrupts = session.get(Session.IGNORE_INTERRUPTS);
try {
session.put(Session.IGNORE_INTERRUPTS, Boolean.TRUE);
String name = "Karaf local console user " + ShellUtil.getCurrentUserName();
Thread thread = new Thread(newSession, name);
thread.start();
thread.join();
} finally {
session.put(Session.IGNORE_INTERRUPTS, oldIgnoreInterrupts);
}
return null;
}
});
loginContext.logout();
return null;
}
}