| /* |
| * 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.shell.ssh; |
| |
| import java.io.IOException; |
| import java.security.Principal; |
| |
| 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.FailedLoginException; |
| import javax.security.auth.login.LoginContext; |
| |
| import org.apache.sshd.common.Session; |
| import org.apache.sshd.server.PasswordAuthenticator; |
| import org.apache.sshd.server.session.ServerSession; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class KarafJaasPasswordAuthenticator implements PasswordAuthenticator { |
| |
| public static final Session.AttributeKey<Subject> SUBJECT_ATTRIBUTE_KEY = new Session.AttributeKey<Subject>(); |
| private final Logger LOGGER = LoggerFactory.getLogger(KarafJaasPasswordAuthenticator.class); |
| |
| private String realm; |
| private String role; |
| |
| public String getRealm() { |
| return realm; |
| } |
| |
| public void setRealm(String realm) { |
| this.realm = realm; |
| } |
| |
| public String getRole() { |
| return role; |
| } |
| |
| public void setRole(String role) { |
| this.role = role; |
| } |
| |
| public boolean authenticate(final String username, final String password, final ServerSession session) { |
| try { |
| 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(username); |
| } else if (callback instanceof PasswordCallback) { |
| ((PasswordCallback) callback).setPassword(password.toCharArray()); |
| } else { |
| throw new UnsupportedCallbackException(callback); |
| } |
| } |
| } |
| }); |
| loginContext.login(); |
| if (role != null && role.length() > 0) { |
| String clazz = "org.apache.karaf.jaas.modules.RolePrincipal"; |
| String name = role; |
| int idx = role.indexOf(':'); |
| if (idx > 0) { |
| clazz = role.substring(0, idx); |
| name = role.substring(idx + 1); |
| } |
| boolean found = false; |
| for (Principal p : subject.getPrincipals()) { |
| if (p.getClass().getName().equals(clazz) |
| && p.getName().equals(name)) { |
| found = true; |
| break; |
| } |
| } |
| if (!found) { |
| throw new FailedLoginException("User does not have the required role " + role); |
| } |
| } |
| session.setAttribute(SUBJECT_ATTRIBUTE_KEY, subject); |
| return true; |
| } catch (Exception e) { |
| LOGGER.debug("User authentication failed with " + e.getMessage(), e); |
| return false; |
| } |
| } |
| |
| } |