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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 Also:
  • RFC 2222 - Simple Authentication and Security Layer (SASL)
/** * 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
Params:
  • mech – non-null
  • authorizationId – can be null or empty and ignored
  • protocol – non-null for Sasl, useless for NTLM
  • serverName – non-null for Sasl, but can be null for NTLM
  • props – can be null
  • cbh – can be null for Sasl, already null-checked in factory
Throws:
/** * @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, already null-checked in factory * @throws SaslException */
NTLMClient(String mech, String authzid, String protocol, String serverName, Map<String, ?> 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 { String name = ncb.getName(); if (name == null) { name = authzid; } String domain = dcb.getText(); if (domain == null) { domain = serverName; } client = new Client(version, hostname, name, domain, pcb.getPassword()); } catch (NTLMException ne) { throw new SaslException( "NTLM: client creation failure", 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 IllegalStateException("Not supported."); } @Override public byte[] wrap(byte[] outgoing, int offset, int len) throws SaslException { throw new IllegalStateException("Not supported."); } @Override public Object getNegotiatedProperty(String propName) { if (!isComplete()) { throw new IllegalStateException("authentication not complete"); } switch (propName) { case Sasl.QOP: return "auth"; case NTLM_DOMAIN: return client.getDomain(); default: 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); } } } }