/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* Licensed 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.keycloak.testsuite.federation;
import org.ietf.jgss.GSSCredential;
import org.keycloak.KeycloakPrincipal;
import org.keycloak.common.constants.KerberosConstants;
import org.keycloak.common.util.KerberosSerializationUtils;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.security.sasl.Sasl;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Hashtable;
/**
* @author <a href="mailto:mposolda@redhat.com">Marek Posolda</a>
*/
public class KerberosCredDelegServlet extends HttpServlet {
public static final String CRED_DELEG_TEST_PATH = "/cred-deleg-test";
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String ldapData = null;
if (req.getRequestURI().endsWith(CRED_DELEG_TEST_PATH)) {
try {
// Retrieve kerberos credential from accessToken and deserialize it
KeycloakPrincipal keycloakPrincipal = (KeycloakPrincipal) req.getUserPrincipal();
String serializedGssCredential = (String) keycloakPrincipal.getKeycloakSecurityContext().getToken().getOtherClaims().get(KerberosConstants.GSS_DELEGATION_CREDENTIAL);
GSSCredential gssCredential = KerberosSerializationUtils.deserializeCredential(serializedGssCredential);
// First try to invoke without gssCredential. It should fail
try {
invokeLdap(null);
throw new RuntimeException("Not expected to authenticate to LDAP without credential");
} catch (NamingException nse) {
System.out.println("Expected exception: " + nse.getMessage());
}
ldapData = invokeLdap(gssCredential);
} catch (KerberosSerializationUtils.KerberosSerializationException kse) {
System.err.println("KerberosSerializationUtils.KerberosSerializationException: " + kse.getMessage());
ldapData = "ERROR";
} catch (Exception e) {
e.printStackTrace();
resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
}
}
resp.setContentType("text/html");
PrintWriter pw = resp.getWriter();
pw.printf("<html><head><title>%s</title></head><body>", "Kerberos Test");
pw.printf("Kerberos servlet secured content<br>");
if (ldapData != null) {
pw.printf("LDAP Data: " + ldapData + "<br>");
}
pw.print("</body></html>");
pw.flush();
}
private String invokeLdap(GSSCredential gssCredential) throws NamingException {
Hashtable env = new Hashtable(11);
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://localhost:10389");
if (gssCredential != null) {
env.put(Context.SECURITY_AUTHENTICATION, "GSSAPI");
env.put(Sasl.CREDENTIALS, gssCredential);
}
DirContext ctx = new InitialDirContext(env);
try {
Attributes attrs = ctx.getAttributes("uid=hnelson,ou=People,dc=keycloak,dc=org");
String cn = (String) attrs.get("cn").get();
String sn = (String) attrs.get("sn").get();
return cn + " " + sn;
} finally {
ctx.close();
}
}
}