1 /*
2 * Copyright (c) 2000, 2011, 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 /*
27 *
28 * (C) Copyright IBM Corp. 1999 All Rights Reserved.
29 * Copyright 1997 The Open Group Research Institute. All rights reserved.
30 */
31
32 package sun.security.krb5.internal;
33
34 import sun.security.krb5.PrincipalName;
35 import sun.security.krb5.KrbException;
36 import sun.security.krb5.Asn1Exception;
37 import sun.security.util.*;
38 import java.util.Vector;
39 import java.util.ArrayList;
40 import java.net.InetAddress;
41 import java.net.Inet4Address;
42 import java.net.Inet6Address;
43 import java.net.UnknownHostException;
44 import java.io.IOException;
45 import sun.security.krb5.internal.ccache.CCacheOutputStream;
46
47 /**
48 * Implements the ASN.1 HostAddresses type.
49 *
50 * <xmp>
51 * HostAddresses -- NOTE: subtly different from rfc1510,
52 * -- but has a value mapping and encodes the same
53 * ::= SEQUENCE OF HostAddress
54 *
55 * HostAddress ::= SEQUENCE {
56 * addr-type [0] Int32,
57 * address [1] OCTET STRING
58 * }
59 * </xmp>
60 *
61 * <p>
62 * This definition reflects the Network Working Group RFC 4120
63 * specification available at
64 * <a href="http://www.ietf.org/rfc/rfc4120.txt">
65 * http://www.ietf.org/rfc/rfc4120.txt</a>.
66 */
67
68 public class HostAddresses implements Cloneable {
69 private static boolean DEBUG = sun.security.krb5.internal.Krb5.DEBUG;
70 private HostAddress[] addresses = null;
71 private volatile int hashCode = 0;
72
73 public HostAddresses(HostAddress[] new_addresses) throws IOException {
74 if (new_addresses != null) {
75 addresses = new HostAddress[new_addresses.length];
76 for (int i = 0; i < new_addresses.length; i++) {
77 if (new_addresses[i] == null) {
78 throw new IOException("Cannot create a HostAddress");
79 } else {
80 addresses[i] = (HostAddress)new_addresses[i].clone();
81 }
82 }
83 }
84 }
85
86 public HostAddresses() throws UnknownHostException {
87 addresses = new HostAddress[1];
88 addresses[0] = new HostAddress();
89 }
90
91 private HostAddresses(int dummy) {}
92
93 public HostAddresses(PrincipalName serverPrincipal)
94 throws UnknownHostException, KrbException {
95
96 String[] components = serverPrincipal.getNameStrings();
97
98 if (serverPrincipal.getNameType() != PrincipalName.KRB_NT_SRV_HST ||
99 components.length < 2)
100 throw new KrbException(Krb5.KRB_ERR_GENERIC, "Bad name");
101
102 String host = components[1];
103 InetAddress addr[] = InetAddress.getAllByName(host);
104 HostAddress hAddrs[] = new HostAddress[addr.length];
105
106 for (int i = 0; i < addr.length; i++) {
107 hAddrs[i] = new HostAddress(addr[i]);
108 }
109
110 addresses = hAddrs;
111 }
112
113 public Object clone() {
114 HostAddresses new_hostAddresses = new HostAddresses(0);
115 if (addresses != null) {
116 new_hostAddresses.addresses = new HostAddress[addresses.length];
117 for (int i = 0; i < addresses.length; i++) {
118 new_hostAddresses.addresses[i] =
119 (HostAddress)addresses[i].clone();
120 }
121 }
122 return new_hostAddresses;
123 }
124
125 public boolean inList(HostAddress addr) {
126 if (addresses != null) {
127 for (int i = 0; i < addresses.length; i++)
128 if (addresses[i].equals(addr))
129 return true;
130 }
131 return false;
132 }
133
134 public int hashCode() {
135 if (hashCode == 0) {
136 int result = 17;
137 if (addresses != null) {
138 for (int i=0; i < addresses.length; i++) {
139 result = 37*result + addresses[i].hashCode();
140 }
141 }
142 hashCode = result;
143 }
144 return hashCode;
145
146 }
147
148
149 public boolean equals(Object obj) {
150 if (this == obj) {
151 return true;
152 }
153
154 if (!(obj instanceof HostAddresses)) {
155 return false;
156 }
157
158 HostAddresses addrs = (HostAddresses)obj;
159 if ((addresses == null && addrs.addresses != null) ||
160 (addresses != null && addrs.addresses == null))
161 return false;
162 if (addresses != null && addrs.addresses != null) {
163 if (addresses.length != addrs.addresses.length)
164 return false;
165 for (int i = 0; i < addresses.length; i++)
166 if (!addresses[i].equals(addrs.addresses[i]))
167 return false;
168 }
169 return true;
170 }
171
172 /**
173 * Constructs a new <code>HostAddresses</code> object.
174 * @param encoding a single DER-encoded value.
175 * @exception Asn1Exception if an error occurs while decoding an
176 * ASN1 encoded data.
177 * @exception IOException if an I/O error occurs while reading
178 * encoded data.
179 */
180 public HostAddresses(DerValue encoding)
181 throws Asn1Exception, IOException {
182 Vector<HostAddress> tempAddresses = new Vector<>();
183 DerValue der = null;
184 while (encoding.getData().available() > 0) {
185 der = encoding.getData().getDerValue();
186 tempAddresses.addElement(new HostAddress(der));
187 }
188 if (tempAddresses.size() > 0) {
189 addresses = new HostAddress[tempAddresses.size()];
190 tempAddresses.copyInto(addresses);
191 }
192 }
193
194
195 /**
196 * Encodes a <code>HostAddresses</code> object.
197 * @return byte array of encoded <code>HostAddresses</code> object.
198 * @exception Asn1Exception if an error occurs while decoding an
199 * ASN1 encoded data.
200 * @exception IOException if an I/O error occurs while reading
201 * encoded data.
202 */
203 public byte[] asn1Encode() throws Asn1Exception, IOException {
204 DerOutputStream bytes = new DerOutputStream();
205 DerOutputStream temp = new DerOutputStream();
206
207 if (addresses != null && addresses.length > 0) {
208 for (int i = 0; i < addresses.length; i++)
209 bytes.write(addresses[i].asn1Encode());
210 }
211 temp.write(DerValue.tag_Sequence, bytes);
212 return temp.toByteArray();
213 }
214
215 /**
216 * Parse (unmarshal) a <code>HostAddresses</code> from a DER input stream.
217 * This form
218 * parsing might be used when expanding a value which is part of
219 * a constructed sequence and uses explicitly tagged type.
220 *
221 * @exception Asn1Exception if an Asn1Exception occurs.
222 * @param data the Der input stream value, which contains one or more
223 * marshaled value.
224 * @param explicitTag tag number.
225 * @param optional indicates if this data field is optional.
226 * @return an instance of <code>HostAddresses</code>.
227 */
228 public static HostAddresses parse(DerInputStream data,
229 byte explicitTag, boolean optional)
230 throws Asn1Exception, IOException {
231 if ((optional) &&
232 (((byte)data.peekByte() & (byte)0x1F) != explicitTag))
233 return null;
234 DerValue der = data.getDerValue();
235 if (explicitTag != (der.getTag() & (byte)0x1F)) {
236 throw new Asn1Exception(Krb5.ASN1_BAD_ID);
237 } else {
238 DerValue subDer = der.getData().getDerValue();
239 return new HostAddresses(subDer);
240 }
241 }
242
243 /**
244 * Writes data field values in <code>HostAddresses</code> in FCC
245 * format to a <code>CCacheOutputStream</code>.
246 *
247 * @param cos a <code>CCacheOutputStream</code> to be written to.
248 * @exception IOException if an I/O exception occurs.
249 * @see sun.security.krb5.internal.ccache.CCacheOutputStream
250 */
251
252 public void writeAddrs(CCacheOutputStream cos) throws IOException {
253 cos.write32(addresses.length);
254 for (int i = 0; i < addresses.length; i++) {
255 cos.write16(addresses[i].addrType);
256 cos.write32(addresses[i].address.length);
257 cos.write(addresses[i].address, 0,
258 addresses[i].address.length);
259 }
260 }
261
262
263 public InetAddress[] getInetAddresses() {
264
265 if (addresses == null || addresses.length == 0)
266 return null;
267
268 ArrayList<InetAddress> ipAddrs = new ArrayList<>(addresses.length);
269
270 for (int i = 0; i < addresses.length; i++) {
271 try {
272 if ((addresses[i].addrType == Krb5.ADDRTYPE_INET) ||
273 (addresses[i].addrType == Krb5.ADDRTYPE_INET6)) {
274 ipAddrs.add(addresses[i].getInetAddress());
275 }
276 } catch (java.net.UnknownHostException e) {
277 // Should not happen since IP address given
278 return null;
279 }
280 }
281
282 InetAddress[] retVal = new InetAddress[ipAddrs.size()];
283 return ipAddrs.toArray(retVal);
284
285 }
286
287 /**
288 * Returns all the IP addresses of the local host.
289 */
290 public static HostAddresses getLocalAddresses() throws IOException
291 {
292 String hostname = null;
293 InetAddress[] inetAddresses = null;
294 try {
295 InetAddress localHost = InetAddress.getLocalHost();
296 hostname = localHost.getHostName();
297 inetAddresses = InetAddress.getAllByName(hostname);
298 HostAddress[] hAddresses = new HostAddress[inetAddresses.length];
299 for (int i = 0; i < inetAddresses.length; i++)
300 {
301 hAddresses[i] = new HostAddress(inetAddresses[i]);
302 }
303 if (DEBUG) {
304 System.out.println(">>> KrbKdcReq local addresses for "
305 + hostname + " are: ");
306
307 for (int i = 0; i < inetAddresses.length; i++) {
308 System.out.println("\n\t" + inetAddresses[i]);
309 if (inetAddresses[i] instanceof Inet4Address)
310 System.out.println("IPv4 address");
311 if (inetAddresses[i] instanceof Inet6Address)
312 System.out.println("IPv6 address");
313 }
314 }
315 return (new HostAddresses(hAddresses));
316 } catch (Exception exc) {
317 throw new IOException(exc.toString());
318 }
319
320 }
321
322 /**
323 * Creates a new HostAddresses instance from the supplied list
324 * of InetAddresses.
325 */
326 public HostAddresses(InetAddress[] inetAddresses)
327 {
328 if (inetAddresses == null)
329 {
330 addresses = null;
331 return;
332 }
333
334 addresses = new HostAddress[inetAddresses.length];
335 for (int i = 0; i < inetAddresses.length; i++)
336 addresses[i] = new HostAddress(inetAddresses[i]);
337 }
338 }