1 /*
2 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.net.www.protocol.http.ntlm;
27
28 import com.sun.security.ntlm.Client;
29 import com.sun.security.ntlm.NTLMException;
30 import java.io.IOException;
31 import java.net.InetAddress;
32 import java.net.PasswordAuthentication;
33 import java.net.UnknownHostException;
34 import java.net.URL;
35 import java.security.GeneralSecurityException;
36 import java.util.Base64;
37
38 import sun.net.www.HeaderParser;
39 import sun.net.www.protocol.http.AuthenticationInfo;
40 import sun.net.www.protocol.http.AuthScheme;
41 import sun.net.www.protocol.http.HttpURLConnection;
42
43 /**
44 * NTLMAuthentication:
45 *
46 * @author Michael McMahon
47 */
48
49 /*
50 * NTLM authentication is nominally based on the framework defined in RFC2617,
51 * but differs from the standard (Basic & Digest) schemes as follows:
52 *
53 * 1. A complete authentication requires three request/response transactions
54 * as shown below:
55 * REQ ------------------------------->
56 * <---- 401 (signalling NTLM) --------
57 *
58 * REQ (with type1 NTLM msg) --------->
59 * <---- 401 (with type 2 NTLM msg) ---
60 *
61 * REQ (with type3 NTLM msg) --------->
62 * <---- OK ---------------------------
63 *
64 * 2. The scope of the authentication is the TCP connection (which must be kept-alive)
65 * after the type2 response is received. This means that NTLM does not work end-to-end
66 * through a proxy, rather between client and proxy, or between client and server (with no proxy)
67 */
68
69 public class NTLMAuthentication extends AuthenticationInfo {
70 private static final long serialVersionUID = 170L;
71
72 private static final NTLMAuthenticationCallback NTLMAuthCallback =
73 NTLMAuthenticationCallback.getNTLMAuthenticationCallback();
74
75 private String hostname;
76 private static String defaultDomain; /* Domain to use if not specified by user */
77
78 static {
79 defaultDomain = java.security.AccessController.doPrivileged(
80 new sun.security.action.GetPropertyAction("http.auth.ntlm.domain", ""));
81 };
82
83 public static boolean supportsTransparentAuth () {
84 return false;
85 }
86
87 /**
88 * Returns true if the given site is trusted, i.e. we can try
89 * transparent Authentication.
90 */
91 public static boolean isTrustedSite(URL url) {
92 return NTLMAuthCallback.isTrustedSite(url);
93 }
94
95 private void init0() {
96
97 hostname = java.security.AccessController.doPrivileged(
98 new java.security.PrivilegedAction<>() {
99 public String run() {
100 String localhost;
101 try {
102 localhost = InetAddress.getLocalHost().getHostName();
103 } catch (UnknownHostException e) {
104 localhost = "localhost";
105 }
106 return localhost;
107 }
108 });
109 };
110
111 PasswordAuthentication pw;
112
113 Client client;
114 /**
115 * Create a NTLMAuthentication:
116 * Username may be specified as domain<BACKSLASH>username in the application Authenticator.
117 * If this notation is not used, then the domain will be taken
118 * from a system property: "http.auth.ntlm.domain".
119 */
120 public NTLMAuthentication(boolean isProxy, URL url, PasswordAuthentication pw) {
121 super(isProxy ? PROXY_AUTHENTICATION : SERVER_AUTHENTICATION,
122 AuthScheme.NTLM,
123 url,
124 "");
125 init (pw);
126 }
127
128 private void init (PasswordAuthentication pw) {
129 String username;
130 String ntdomain;
131 char[] password;
132 this.pw = pw;
133 String s = pw.getUserName();
134 int i = s.indexOf ('\\');
135 if (i == -1) {
136 username = s;
137 ntdomain = defaultDomain;
138 } else {
139 ntdomain = s.substring (0, i).toUpperCase();
140 username = s.substring (i+1);
141 }
142 password = pw.getPassword();
143 init0();
144 try {
145 client = new Client(System.getProperty("ntlm.version"), hostname,
146 username, ntdomain, password);
147 } catch (NTLMException ne) {
148 try {
149 client = new Client(null, hostname, username, ntdomain, password);
150 } catch (NTLMException ne2) {
151 // Will never happen
152 throw new AssertionError("Really?");
153 }
154 }
155 }
156
157 /**
158 * Constructor used for proxy entries
159 */
160 public NTLMAuthentication(boolean isProxy, String host, int port,
161 PasswordAuthentication pw) {
162 super(isProxy ? PROXY_AUTHENTICATION : SERVER_AUTHENTICATION,
163 AuthScheme.NTLM,
164 host,
165 port,
166 "");
167 init (pw);
168 }
169
170 /**
171 * @return true if this authentication supports preemptive authorization
172 */
173 @Override
174 public boolean supportsPreemptiveAuthorization() {
175 return false;
176 }
177
178 /**
179 * Not supported. Must use the setHeaders() method
180 */
181 @Override
182 public String getHeaderValue(URL url, String method) {
183 throw new RuntimeException ("getHeaderValue not supported");
184 }
185
186 /**
187 * Check if the header indicates that the current auth. parameters are stale.
188 * If so, then replace the relevant field with the new value
189 * and return true. Otherwise return false.
190 * returning true means the request can be retried with the same userid/password
191 * returning false means we have to go back to the user to ask for a new
192 * username password.
193 */
194 @Override
195 public boolean isAuthorizationStale (String header) {
196 return false; /* should not be called for ntlm */
197 }
198
199 /**
200 * Set header(s) on the given connection.
201 * @param conn The connection to apply the header(s) to
202 * @param p A source of header values for this connection, not used because
203 * HeaderParser converts the fields to lower case, use raw instead
204 * @param raw The raw header field.
205 * @return true if all goes well, false if no headers were set.
206 */
207 @Override
208 public synchronized boolean setHeaders(HttpURLConnection conn, HeaderParser p, String raw) {
209
210 try {
211 String response;
212 if (raw.length() < 6) { /* NTLM<sp> */
213 response = buildType1Msg ();
214 } else {
215 String msg = raw.substring (5); /* skip NTLM<sp> */
216 response = buildType3Msg (msg);
217 }
218 conn.setAuthenticationProperty(getHeaderName(), response);
219 return true;
220 } catch (IOException e) {
221 return false;
222 } catch (GeneralSecurityException e) {
223 return false;
224 }
225 }
226
227 private String buildType1Msg () {
228 byte[] msg = client.type1();
229 String result = "NTLM " + Base64.getEncoder().encodeToString(msg);
230 return result;
231 }
232
233 private String buildType3Msg (String challenge) throws GeneralSecurityException,
234 IOException {
235 /* First decode the type2 message to get the server nonce */
236 /* nonce is located at type2[24] for 8 bytes */
237
238 byte[] type2 = Base64.getDecoder().decode(challenge);
239 byte[] nonce = new byte[8];
240 new java.util.Random().nextBytes(nonce);
241 byte[] msg = client.type3(type2, nonce);
242 String result = "NTLM " + Base64.getEncoder().encodeToString(msg);
243 return result;
244 }
245 }
246