/*
* 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 java.util.List;
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.util.jaas.JaasHelper;
@Command(scope = "jaas", name = "sudo", description = "Execute a command as another user")
@Service
public class SudoCommand implements Action {
@Option(name = "--realm")
String realm = "karaf";
@Option(name = "--user")
String user = "karaf";
@Argument(multiValued = true)
List<String> command;
@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 = SudoCommand.this.session.readLine("Password: ", '*');
((PasswordCallback) callback).setPassword(password.toCharArray());
} else {
throw new UnsupportedCallbackException(callback);
}
}
}
});
loginContext.login();
final StringBuilder sb = new StringBuilder();
for (String s : command) {
if (sb.length() > 0) {
sb.append(" ");
}
sb.append(s);
}
JaasHelper.doAs(subject, new PrivilegedExceptionAction<Object>() {
@Override
public Object run() throws Exception {
return session.execute(sb);
}
});
loginContext.logout();
return null;
}
}