/**
* This file is part of Graylog2.
*
* Graylog2 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog2 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog2. If not, see <http://www.gnu.org/licenses/>.
*/
package org.graylog2.security.realm;
import org.apache.shiro.authc.*;
import org.apache.shiro.authc.credential.AllowAllCredentialsMatcher;
import org.apache.shiro.realm.AuthenticatingRealm;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;
import org.apache.shiro.util.ThreadContext;
import org.graylog2.security.SessionIdToken;
import org.graylog2.users.User;
import org.graylog2.users.UserService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.inject.Inject;
import javax.ws.rs.core.MultivaluedMap;
public class SessionAuthenticator extends AuthenticatingRealm {
private static final Logger LOG = LoggerFactory.getLogger(SessionAuthenticator.class);
private final UserService userService;
private final LdapUserAuthenticator ldapAuthenticator;
@Inject
public SessionAuthenticator(UserService userService, LdapUserAuthenticator ldapAuthenticator) {
this.userService = userService;
this.ldapAuthenticator = ldapAuthenticator;
// this realm either rejects a session, or allows the associated user implicitly
setAuthenticationTokenClass(SessionIdToken.class);
setCredentialsMatcher(new AllowAllCredentialsMatcher());
}
@Override
protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
SessionIdToken sessionIdToken = (SessionIdToken) token;
final Subject subject = new Subject.Builder().sessionId(sessionIdToken.getSessionId()).buildSubject();
final Session session = subject.getSession(false);
if (session == null) {
LOG.debug("Invalid session {}. Either it has expired or did not exist.", sessionIdToken.getSessionId());
return null;
}
final Object username = subject.getPrincipal();
final User user = userService.load(String.valueOf(username));
if (user == null) {
LOG.debug("No user named {} found for session {}", username, sessionIdToken.getSessionId());
return null;
}
if (user.isExternalUser() && !ldapAuthenticator.isEnabled()) {
throw new LockedAccountException("LDAP authentication is currently disabled.");
}
if (LOG.isDebugEnabled()) {
LOG.debug("Found session {} for user name {}", session.getId(), username);
}
@SuppressWarnings("unchecked")
final MultivaluedMap<String, String> requestHeaders = (MultivaluedMap<String, String>) ThreadContext.get(
"REQUEST_HEADERS");
// extend session unless the relevant header was passed.
if (requestHeaders == null || !"true".equalsIgnoreCase(requestHeaders.getFirst("X-Graylog2-No-Session-Extension"))) {
session.touch();
} else {
LOG.debug("Not extending session because the request indicated not to.");
}
ThreadContext.bind(subject);
return new SimpleAccount(user.getName(), null, "session authenticator");
}
}