/* * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.jndi.ldap.sasl; import java.io.*; import java.security.cert.X509Certificate; import java.util.Vector; import java.util.Hashtable; import java.util.StringTokenizer; import javax.naming.AuthenticationException; import javax.naming.AuthenticationNotSupportedException; import javax.naming.NamingException; import javax.naming.ldap.Control; import javax.security.auth.callback.CallbackHandler; import javax.security.sasl.*; import com.sun.jndi.ldap.Connection; import com.sun.jndi.ldap.LdapClient; import com.sun.jndi.ldap.LdapResult; import com.sun.jndi.ldap.sasl.TlsChannelBinding.TlsChannelBindingType; /** * Handles SASL support. * * @author Vincent Ryan * @author Rosanna Lee */ final public class LdapSasl { // SASL stuff private static final String SASL_CALLBACK = "java.naming.security.sasl.callback"; private static final String SASL_AUTHZ_ID = "java.naming.security.sasl.authorizationId"; private static final String SASL_REALM = "java.naming.security.sasl.realm"; private static final int LDAP_SUCCESS = 0; private static final int LDAP_SASL_BIND_IN_PROGRESS = 14; // LDAPv3 private LdapSasl() { } /** * Performs SASL bind. * Creates a SaslClient by using a default CallbackHandler * that uses the Context.SECURITY_PRINCIPAL and Context.SECURITY_CREDENTIALS * properties to satisfy the callbacks, and by using the * SASL_AUTHZ_ID property as the authorization id. If the SASL_AUTHZ_ID * property has not been set, Context.SECURITY_PRINCIPAL is used. * If SASL_CALLBACK has been set, use that instead of the default * CallbackHandler. *

* If bind is successful and the selected SASL mechanism has a security * layer, set inStream and outStream to be filter streams that use * the security layer. These will be used for subsequent communication * with the server. * * @param conn The non-null connection to use for sending an LDAP BIND * @param server Non-null string name of host to connect to * @param dn Non-null DN to bind as; also used as authentication ID * @param pw Possibly null password; can be byte[], char[] or String * @param authMech A non-null space-separated list of SASL authentication * mechanisms. * @param env The possibly null environment of the context, possibly containing * properties for used by SASL mechanisms * @param bindCtls The possibly null controls to accompany the bind * @return LdapResult containing status of the bind */ @SuppressWarnings("unchecked") public static LdapResult saslBind(LdapClient clnt, Connection conn, String server, String dn, Object pw, String authMech, Hashtable env, Control[] bindCtls) throws IOException, NamingException { SaslClient saslClnt = null; boolean cleanupHandler = false; // Use supplied callback handler or create default CallbackHandler cbh = (env != null) ? (CallbackHandler)env.get(SASL_CALLBACK) : null; if (cbh == null) { cbh = new DefaultCallbackHandler(dn, pw, (String)env.get(SASL_REALM)); cleanupHandler = true; } // Prepare parameters for creating SASL client String authzId = (env != null) ? (String)env.get(SASL_AUTHZ_ID) : null; String[] mechs = getSaslMechanismNames(authMech); // Internal TLS Channel Binding property cannot be set explicitly if (env.get(TlsChannelBinding.CHANNEL_BINDING) != null) { throw new NamingException(TlsChannelBinding.CHANNEL_BINDING + " property cannot be set explicitly"); } Hashtable envProps = (Hashtable) env; try { // Prepare TLS Channel Binding data if (conn.isTlsConnection()) { TlsChannelBindingType cbType = TlsChannelBinding.parseType( (String)env.get(TlsChannelBinding.CHANNEL_BINDING_TYPE)); if (cbType == TlsChannelBindingType.TLS_SERVER_END_POINT) { // set tls-server-end-point channel binding X509Certificate cert = conn.getTlsServerCertificate(); if (cert != null) { TlsChannelBinding tlsCB = TlsChannelBinding.create(cert); envProps = (Hashtable) env.clone(); envProps.put(TlsChannelBinding.CHANNEL_BINDING, tlsCB.getData()); } else { throw new SaslException("No suitable certificate to generate " + "TLS Channel Binding data"); } } } // Create SASL client to use using SASL package saslClnt = Sasl.createSaslClient( mechs, authzId, "ldap", server, envProps, cbh); if (saslClnt == null) { throw new AuthenticationNotSupportedException(authMech); } LdapResult res; String mechName = saslClnt.getMechanismName(); byte[] response = saslClnt.hasInitialResponse() ? saslClnt.evaluateChallenge(NO_BYTES) : null; res = clnt.ldapBind(null, response, bindCtls, mechName, true); while (!saslClnt.isComplete() && (res.status == LDAP_SASL_BIND_IN_PROGRESS || res.status == LDAP_SUCCESS)) { response = saslClnt.evaluateChallenge( res.serverCreds != null? res.serverCreds : NO_BYTES); if (res.status == LDAP_SUCCESS) { if (response != null) { throw new AuthenticationException( "SASL client generated response after success"); } break; } res = clnt.ldapBind(null, response, bindCtls, mechName, true); } if (res.status == LDAP_SUCCESS) { if (!saslClnt.isComplete()) { throw new AuthenticationException( "SASL authentication not complete despite server claims"); } String qop = (String) saslClnt.getNegotiatedProperty(Sasl.QOP); // If negotiated integrity or privacy, if (qop != null && (qop.equalsIgnoreCase("auth-int") || qop.equalsIgnoreCase("auth-conf"))) { InputStream newIn = new SaslInputStream(saslClnt, conn.inStream); OutputStream newOut = new SaslOutputStream(saslClnt, conn.outStream); conn.replaceStreams(newIn, newOut); } else { saslClnt.dispose(); } } return res; } catch (SaslException e) { NamingException ne = new AuthenticationException( authMech); ne.setRootCause(e); throw ne; } finally { if (cleanupHandler) { ((DefaultCallbackHandler)cbh).clearPassword(); } } } /** * Returns an array of SASL mechanisms given a string of space * separated SASL mechanism names. * @param The non-null string containing the mechanism names * @return A non-null array of String; each element of the array * contains a single mechanism name. */ private static String[] getSaslMechanismNames(String str) { StringTokenizer parser = new StringTokenizer(str); Vector mechs = new Vector<>(10); while (parser.hasMoreTokens()) { mechs.addElement(parser.nextToken()); } String[] mechNames = new String[mechs.size()]; for (int i = 0; i < mechs.size(); i++) { mechNames[i] = mechs.elementAt(i); } return mechNames; } private static final byte[] NO_BYTES = new byte[0]; }