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/*
************************************************************************
******************* CANADIAN ASTRONOMY DATA CENTRE *******************
************** CENTRE CANADIEN DE DONNÉES ASTRONOMIQUES **************
*
* (c) 2014. (c) 2014.
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* Government of Canada Gouvernement du Canada
* National Research Council Conseil national de recherches
* Ottawa, Canada, K1A 0R6 Ottawa, Canada, K1A 0R6
* All rights reserved Tous droits réservés
*
* NRC disclaims any warranties, Le CNRC dénie toute garantie
* expressed, implied, or énoncée, implicite ou légale,
* statutory, of any kind with de quelque nature que ce
* respect to the software, soit, concernant le logiciel,
* including without limitation y compris sans restriction
* any warranty of merchantability toute garantie de valeur
* or fitness for a particular marchande ou de pertinence
* purpose. NRC shall not be pour un usage particulier.
* liable in any event for any Le CNRC ne pourra en aucun cas
* damages, whether direct or être tenu responsable de tout
* indirect, special or general, dommage, direct ou indirect,
* consequential or incidental, particulier ou général,
* arising from the use of the accessoire ou fortuit, résultant
* software. Neither the name de l'utilisation du logiciel. Ni
* of the National Research le nom du Conseil National de
* Council of Canada nor the Recherches du Canada ni les noms
* names of its contributors may de ses participants ne peuvent
* be used to endorse or promote être utilisés pour approuver ou
* products derived from this promouvoir les produits dérivés
* software without specific prior de ce logiciel sans autorisation
* written permission. préalable et particulière
* par écrit.
*
* This file is part of the Ce fichier fait partie du projet
* OpenCADC project. OpenCADC.
*
* OpenCADC is free software: OpenCADC est un logiciel libre ;
* you can redistribute it and/or vous pouvez le redistribuer ou le
* modify it under the terms of modifier suivant les termes de
* the GNU Affero General Public la “GNU Affero General Public
* License as published by the License” telle que publiée
* Free Software Foundation, par la Free Software Foundation
* either version 3 of the : soit la version 3 de cette
* License, or (at your option) licence, soit (à votre gré)
* any later version. toute version ultérieure.
*
* OpenCADC is distributed in the OpenCADC est distribué
* hope that it will be useful, dans l’espoir qu’il vous
* but WITHOUT ANY WARRANTY; sera utile, mais SANS AUCUNE
* without even the implied GARANTIE : sans même la garantie
* warranty of MERCHANTABILITY implicite de COMMERCIALISABILITÉ
* or FITNESS FOR A PARTICULAR ni d’ADÉQUATION À UN OBJECTIF
* PURPOSE. See the GNU Affero PARTICULIER. Consultez la Licence
* General Public License for Générale Publique GNU Affero
* more details. pour plus de détails.
*
* You should have received Vous devriez avoir reçu une
* a copy of the GNU Affero copie de la Licence Générale
* General Public License along Publique GNU Affero avec
* with OpenCADC. If not, see OpenCADC ; si ce n’est
* <http://www.gnu.org/licenses/>. pas le cas, consultez :
* <http://www.gnu.org/licenses/>.
*
* $Revision: 4 $
*
************************************************************************
*/
package ca.nrc.cadc.ac.server.web;
import java.net.URI;
import java.net.URISyntaxException;
import java.security.AccessControlException;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.Calendar;
import java.util.GregorianCalendar;
import javax.security.auth.Subject;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
import ca.nrc.cadc.ac.Group;
import ca.nrc.cadc.ac.Role;
import ca.nrc.cadc.ac.server.GroupDetailSelector;
import ca.nrc.cadc.ac.server.PluginFactory;
import ca.nrc.cadc.ac.server.UserPersistence;
import ca.nrc.cadc.ac.server.ldap.LdapGroupPersistence;
import ca.nrc.cadc.auth.AuthenticatorImpl;
import ca.nrc.cadc.auth.DelegationToken;
import ca.nrc.cadc.auth.HttpPrincipal;
import ca.nrc.cadc.auth.SSOCookieManager;
import ca.nrc.cadc.date.DateUtil;
import ca.nrc.cadc.log.ServletLogInfo;
import ca.nrc.cadc.util.StringUtil;
import com.unboundid.ldap.sdk.LDAPException;
@SuppressWarnings("serial")
public class LoginServlet extends HttpServlet
private static final Logger log = Logger.getLogger(LoginServlet.class);
private static final String CONTENT_TYPE = "text/plain";
private static final String PROXY_ACCESS = "Proxy user access: ";
// " as " - delimiter use for proxy user authentication
public static final String PROXY_USER_DELIM = "\\s[aA][sS]\\s";
String proxyGroup; // only users in this group can impersonate other users
String nonImpersonGroup; // users in this group cannot be impersonated
UserPersistence userPersistence;
GroupPersistence groupPersistence;
@Override
public void init(final ServletConfig config) throws ServletException
{
super.init(config);
try
{
this.proxyGroup = config.getInitParameter(LoginServlet.class.getName() + ".proxyGroup");
log.debug("proxyGroup: " + proxyGroup);
this.nonImpersonGroup = config.getInitParameter(LoginServlet.class.getName() + ".nonImpersonGroup");
log.debug("nonImpersonGroup: " + nonImpersonGroup);
PluginFactory pluginFactory = new PluginFactory();
userPersistence = pluginFactory.createUserPersistence();
groupPersistence = pluginFactory.createGroupPersistence();
throw new ExceptionInInitializerError(ex);
* Attempt to login for userid/password.
@SuppressWarnings("rawtypes")
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws IOException
{
long start = System.currentTimeMillis();
ServletLogInfo logInfo = new ServletLogInfo(request);
String userID = request.getParameter("username");
String password = request.getParameter("password");
String scope = request.getParameter("scope");
if (userID == null || userID.length() == 0)
throw new IllegalArgumentException("Missing username");
if (password == null || password.length() == 0)
throw new IllegalArgumentException("Missing password");
userID = userID.trim();
password = password.trim();
String[] fields = userID.split(PROXY_USER_DELIM);
if (fields.length == 2 )
proxyUser = fields[0].trim();
userID = fields[1].trim();
if ((StringUtil.hasText(proxyUser) &&
userPersistence.doLogin(proxyUser, password)) ||
(!StringUtil.hasText(proxyUser) &&
userPersistence.doLogin(userID, password)))
String token = null;
HttpPrincipal p = new HttpPrincipal(userID, proxyUser);
if (scope != null)
{
// This cookie will be scope to a certain URI,
// such as a VOSpace node
URI uri = null;
try
{
uri = new URI(scope);
}
catch (URISyntaxException e)
{
throw new IllegalArgumentException("Invalid scope: " + scope);
}
final Calendar expiryDate = new GregorianCalendar(DateUtil.UTC);
expiryDate.add(Calendar.HOUR, SSOCookieManager.SSO_COOKIE_LIFETIME_HOURS);
DelegationToken dt = new DelegationToken(p, uri, expiryDate.getTime());
token = DelegationToken.format(dt);
}
else
{
token = new SSOCookieManager().generate(p);
}
response.setContentType(CONTENT_TYPE);
response.setContentLength(token.length());
response.getWriter().write(token);
}
}
catch (IllegalArgumentException e)
{
String msg = e.getMessage();
if (msg.startsWith(PROXY_ACCESS))
{
log.warn(msg, e);
}
else
{
log.debug(msg, e);
}
logInfo.setMessage(msg);
response.setContentType(CONTENT_TYPE);
response.getWriter().write(msg);
catch (AccessControlException e)
{
log.debug(e.getMessage(), e);
String message = e.getMessage();
Brian Major
committed
logInfo.setMessage(message);
response.setContentType(CONTENT_TYPE);
Brian Major
committed
response.getWriter().write(message);
response.setStatus(401);
}
catch (TransientException e)
{
log.debug(e.getMessage(), e);
String message = e.getMessage();
logInfo.setMessage(message);
logInfo.setSuccess(false);
response.setContentType("CONTENT_TYPE");
if (e.getRetryDelay() > 0)
response.setHeader("Retry-After", Integer.toString(e.getRetryDelay()));
response.getWriter().write("Transient Error: " + message);
response.setStatus(503);
}
catch (Throwable t)
{
String message = "Internal Server Error: " + t.getMessage();
log.error(message, t);
logInfo.setSuccess(false);
logInfo.setMessage(message);
response.setContentType(CONTENT_TYPE);
response.getWriter().write(message);
response.setStatus(500);
}
finally
{
logInfo.setElapsedTime(System.currentTimeMillis() - start);
log.info(logInfo.end());
}
}
/**
* Checks if user can impersonate another user
*/
protected void checkCanImpersonate(final String userID, final String proxyUser)
TransientException, Throwable
// Users (proxy and the user to be impersonated) are not authenticated
// at this point so in order to make the calls to check their group
// membership we need to create corresponding subjects and run the
// get groups command in the corresponding subject context.
AuthenticatorImpl ai = new AuthenticatorImpl();
Subject proxySubject = new Subject();
proxySubject.getPrincipals().add(new HttpPrincipal(proxyUser));
ai.augmentSubject(proxySubject);
Subject.doAs(proxySubject, new PrivilegedExceptionAction<Object>()
{
@Override
public Object run() throws Exception
{
if (groupPersistence.getGroups(Role.MEMBER, proxyGroup).isEmpty())
{
throw new AccessControlException(PROXY_ACCESS
+ proxyUser + " as " + userID
+ " failed - not allowed to impersonate ("
+ proxyUser + " not in " + proxyGroup
+ " group)");
}
return null;
}
});
Subject userSubject = new Subject();
userSubject.getPrincipals().add(new HttpPrincipal(userID));
ai.augmentSubject(userSubject);
Subject.doAs(userSubject, new PrivilegedExceptionAction<Object>()
{
@Override
public Object run()
throws Exception
if (!groupPersistence.getGroups(Role.MEMBER, nonImpersonGroup).isEmpty())
{
throw new AccessControlException(PROXY_ACCESS
+ proxyUser + " as " + userID
+ " failed - non impersonable (" + userID
+ " in " + nonImpersonGroup + " group)");
}
return null;
}
});
}
catch (PrivilegedActionException e)
Throwable cause = e.getCause();
if (cause != null)
{
throw cause;
}
Exception exception = e.getException();
if (exception != null)
throw exception;
protected LdapGroupPersistence getLdapGroupPersistence() throws AccessControlException, LDAPException
LdapGroupPersistence gp = new LdapGroupPersistence();
gp.setDetailSelector(new GroupDetailSelector()
{
@Override
public boolean isDetailedSearch(Group g, Role r)
{
return false;
}
});
return gp;
}