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* Copyright (c) 2010, 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.
*
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package com.sun.security.sasl.ntlm;
import com.sun.security.ntlm.Client;
import com.sun.security.ntlm.NTLMException;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Map;
import java.util.Random;
import javax.security.auth.callback.Callback;
import javax.security.sasl.*;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
/**
* Required callbacks:
* - RealmCallback
* handle can provide domain info for authentication, optional
* - NameCallback
* handler must enter username to use for authentication
* - PasswordCallback
* handler must enter password for username to use for authentication
*
* Environment properties that affect behavior of implementation:
*
* javax.security.sasl.qop
* String, quality of protection; only "auth" is accepted, default "auth"
*
* com.sun.security.sasl.ntlm.version
* String, name a specific version to use; can be:
* LM/NTLM: Original NTLM v1
* LM: Original NTLM v1, LM only
* NTLM: Original NTLM v1, NTLM only
* NTLM2: NTLM v1 with Client Challenge
* LMv2/NTLMv2: NTLM v2
* LMv2: NTLM v2, LM only
* NTLMv2: NTLM v2, NTLM only
* If not specified, use system property "ntlm.version". If
* still not specified, use default value "LMv2/NTLMv2".
*
* com.sun.security.sasl.ntlm.random
* java.util.Random, the nonce source to be used in NTLM v2 or NTLM v1 with
* Client Challenge. Default null, an internal java.util.Random object
* will be used
*
* Negotiated Properties:
*
* javax.security.sasl.qop
* Always "auth"
*
* com.sun.security.sasl.html.domain
* The domain for the user, provided by the server
*
* @see <a href="http://www.ietf.org/rfc/rfc2222.txt">RFC 2222</a>
* - Simple Authentication and Security Layer (SASL)
*
*/
final class NTLMClient implements SaslClient {
private static final String NTLM_VERSION =
"com.sun.security.sasl.ntlm.version";
private static final String NTLM_RANDOM =
"com.sun.security.sasl.ntlm.random";
private final static String NTLM_DOMAIN =
"com.sun.security.sasl.ntlm.domain";
private final static String NTLM_HOSTNAME =
"com.sun.security.sasl.ntlm.hostname";
private final Client client;
private final String mech;
private final Random random;
private int step = 0; // 0-start,1-nego,2-auth,3-done
/**
* @param mech non-null
* @param authorizationId can be null or empty and ignored
* @param protocol non-null for Sasl, useless for NTLM
* @param serverName non-null for Sasl, but can be null for NTLM
* @param props can be null
* @param cbh can be null for Sasl, but will throw NPE for NTLM
* @throws SaslException
*/
NTLMClient(String mech, String authzid, String protocol, String serverName,
Map props, CallbackHandler cbh) throws SaslException {
this.mech = mech;
String version = null;
Random rtmp = null;
String hostname = null;
if (props != null) {
String qop = (String)props.get(Sasl.QOP);
if (qop != null && !qop.equals("auth")) {
throw new SaslException("NTLM only support auth");
}
version = (String)props.get(NTLM_VERSION);
rtmp = (Random)props.get(NTLM_RANDOM);
hostname = (String)props.get(NTLM_HOSTNAME);
}
this.random = rtmp != null ? rtmp : new Random();
if (version == null) {
version = System.getProperty("ntlm.version");
}
RealmCallback dcb = (serverName != null && !serverName.isEmpty())?
new RealmCallback("Realm: ", serverName) :
new RealmCallback("Realm: ");
NameCallback ncb = (authzid != null && !authzid.isEmpty()) ?
new NameCallback("User name: ", authzid) :
new NameCallback("User name: ");
PasswordCallback pcb =
new PasswordCallback("Password: ", false);
try {
cbh.handle(new Callback[] {dcb, ncb, pcb});
} catch (UnsupportedCallbackException e) {
throw new SaslException("NTLM: Cannot perform callback to " +
"acquire realm, username or password", e);
} catch (IOException e) {
throw new SaslException(
"NTLM: Error acquiring realm, username or password", e);
}
if (hostname == null) {
try {
hostname = InetAddress.getLocalHost().getCanonicalHostName();
} catch (UnknownHostException e) {
hostname = "localhost";
}
}
try {
client = new Client(version, hostname,
ncb.getName(),
dcb.getText(),
pcb.getPassword());
} catch (NTLMException ne) {
throw new SaslException(
"NTLM: Invalid version string: " + version, ne);
}
}
@Override
public String getMechanismName() {
return mech;
}
@Override
public boolean isComplete() {
return step >= 2;
}
@Override
public byte[] unwrap(byte[] incoming, int offset, int len)
throws SaslException {
throw new UnsupportedOperationException("Not supported.");
}
@Override
public byte[] wrap(byte[] outgoing, int offset, int len)
throws SaslException {
throw new UnsupportedOperationException("Not supported.");
}
@Override
public Object getNegotiatedProperty(String propName) {
if (propName.equals(Sasl.QOP)) {
return "auth";
} else if (propName.equals(NTLM_DOMAIN)) {
return client.getDomain();
} else {
return null;
}
}
@Override
public void dispose() throws SaslException {
client.dispose();
}
@Override
public boolean hasInitialResponse() {
return true;
}
@Override
public byte[] evaluateChallenge(byte[] challenge) throws SaslException {
step++;
if (step == 1) {
return client.type1();
} else {
try {
byte[] nonce = new byte[8];
random.nextBytes(nonce);
return client.type3(challenge, nonce);
} catch (NTLMException ex) {
throw new SaslException("Type3 creation failed", ex);
}
}
}
}