2
|
1 |
/*
|
5506
|
2 |
* Copyright (c) 2000, 2006, Oracle and/or its affiliates. All rights reserved.
|
2
|
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
|
5506
|
7 |
* published by the Free Software Foundation. Oracle designates this
|
2
|
8 |
* particular file as subject to the "Classpath" exception as provided
|
5506
|
9 |
* by Oracle in the LICENSE file that accompanied this code.
|
2
|
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 |
*
|
5506
|
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.
|
2
|
24 |
*/
|
|
25 |
|
|
26 |
package javax.security.auth.kerberos;
|
|
27 |
|
|
28 |
import java.util.*;
|
|
29 |
import java.security.Permission;
|
|
30 |
import java.security.BasicPermission;
|
|
31 |
import java.security.PermissionCollection;
|
|
32 |
import java.io.ObjectStreamField;
|
|
33 |
import java.io.ObjectOutputStream;
|
|
34 |
import java.io.ObjectInputStream;
|
|
35 |
import java.io.IOException;
|
|
36 |
|
|
37 |
/**
|
|
38 |
* This class is used to restrict the usage of the Kerberos
|
|
39 |
* delegation model, ie: forwardable and proxiable tickets.
|
|
40 |
* <p>
|
|
41 |
* The target name of this <code>Permission</code> specifies a pair of
|
|
42 |
* kerberos service principals. The first is the subordinate service principal
|
|
43 |
* being entrusted to use the TGT. The second service principal designates
|
|
44 |
* the target service the subordinate service principal is to
|
|
45 |
* interact with on behalf of the initiating KerberosPrincipal. This
|
|
46 |
* latter service principal is specified to restrict the use of a
|
|
47 |
* proxiable ticket.
|
|
48 |
* <p>
|
|
49 |
* For example, to specify the "host" service use of a forwardable TGT the
|
|
50 |
* target permission is specified as follows:
|
|
51 |
* <p>
|
|
52 |
* <pre>
|
|
53 |
* DelegationPermission("\"host/foo.example.com@EXAMPLE.COM\" \"krbtgt/EXAMPLE.COM@EXAMPLE.COM\"");
|
|
54 |
* </pre>
|
|
55 |
* <p>
|
|
56 |
* To give the "backup" service a proxiable nfs service ticket the target permission
|
|
57 |
* might be specified:
|
|
58 |
* <p>
|
|
59 |
* <pre>
|
|
60 |
* DelegationPermission("\"backup/bar.example.com@EXAMPLE.COM\" \"nfs/home.EXAMPLE.COM@EXAMPLE.COM\"");
|
|
61 |
* </pre>
|
|
62 |
*
|
|
63 |
* @since 1.4
|
|
64 |
*/
|
|
65 |
|
|
66 |
public final class DelegationPermission extends BasicPermission
|
|
67 |
implements java.io.Serializable {
|
|
68 |
|
|
69 |
private static final long serialVersionUID = 883133252142523922L;
|
|
70 |
|
|
71 |
private transient String subordinate, service;
|
|
72 |
|
|
73 |
/**
|
|
74 |
* Create a new <code>DelegationPermission</code>
|
|
75 |
* with the specified subordinate and target principals.
|
|
76 |
*
|
|
77 |
* <p>
|
|
78 |
*
|
|
79 |
* @param principals the name of the subordinate and target principals
|
|
80 |
*
|
|
81 |
* @throws NullPointerException if <code>principals</code> is <code>null</code>.
|
|
82 |
* @throws IllegalArgumentException if <code>principals</code> is empty.
|
|
83 |
*/
|
|
84 |
public DelegationPermission(String principals) {
|
|
85 |
super(principals);
|
|
86 |
init(principals);
|
|
87 |
}
|
|
88 |
|
|
89 |
/**
|
|
90 |
* Create a new <code>DelegationPermission</code>
|
|
91 |
* with the specified subordinate and target principals.
|
|
92 |
* <p>
|
|
93 |
*
|
|
94 |
* @param principals the name of the subordinate and target principals
|
|
95 |
* <p>
|
|
96 |
* @param actions should be null.
|
|
97 |
*
|
|
98 |
* @throws NullPointerException if <code>principals</code> is <code>null</code>.
|
|
99 |
* @throws IllegalArgumentException if <code>principals</code> is empty.
|
|
100 |
*/
|
|
101 |
public DelegationPermission(String principals, String actions) {
|
|
102 |
super(principals, actions);
|
|
103 |
init(principals);
|
|
104 |
}
|
|
105 |
|
|
106 |
|
|
107 |
/**
|
|
108 |
* Initialize the DelegationPermission object.
|
|
109 |
*/
|
|
110 |
private void init(String target) {
|
|
111 |
|
|
112 |
StringTokenizer t = null;
|
|
113 |
if (!target.startsWith("\"")) {
|
|
114 |
throw new IllegalArgumentException
|
|
115 |
("service principal [" + target +
|
|
116 |
"] syntax invalid: " +
|
|
117 |
"improperly quoted");
|
|
118 |
} else {
|
|
119 |
t = new StringTokenizer(target, "\"", false);
|
|
120 |
subordinate = t.nextToken();
|
|
121 |
if (t.countTokens() == 2) {
|
|
122 |
t.nextToken(); // bypass whitespace
|
|
123 |
service = t.nextToken();
|
|
124 |
} else if (t.countTokens() > 0) {
|
|
125 |
throw new IllegalArgumentException
|
|
126 |
("service principal [" + t.nextToken() +
|
|
127 |
"] syntax invalid: " +
|
|
128 |
"improperly quoted");
|
|
129 |
}
|
|
130 |
}
|
|
131 |
}
|
|
132 |
|
|
133 |
/**
|
|
134 |
* Checks if this Kerberos delegation permission object "implies" the
|
|
135 |
* specified permission.
|
|
136 |
* <P>
|
|
137 |
* If none of the above are true, <code>implies</code> returns false.
|
|
138 |
* @param p the permission to check against.
|
|
139 |
*
|
|
140 |
* @return true if the specified permission is implied by this object,
|
|
141 |
* false if not.
|
|
142 |
*/
|
|
143 |
public boolean implies(Permission p) {
|
|
144 |
if (!(p instanceof DelegationPermission))
|
|
145 |
return false;
|
|
146 |
|
|
147 |
DelegationPermission that = (DelegationPermission) p;
|
|
148 |
if (this.subordinate.equals(that.subordinate) &&
|
|
149 |
this.service.equals(that.service))
|
|
150 |
return true;
|
|
151 |
|
|
152 |
return false;
|
|
153 |
}
|
|
154 |
|
|
155 |
|
|
156 |
/**
|
|
157 |
* Checks two DelegationPermission objects for equality.
|
|
158 |
* <P>
|
|
159 |
* @param obj the object to test for equality with this object.
|
|
160 |
*
|
|
161 |
* @return true if <i>obj</i> is a DelegationPermission, and
|
|
162 |
* has the same subordinate and service principal as this.
|
|
163 |
* DelegationPermission object.
|
|
164 |
*/
|
|
165 |
public boolean equals(Object obj) {
|
|
166 |
if (obj == this)
|
|
167 |
return true;
|
|
168 |
|
|
169 |
if (! (obj instanceof DelegationPermission))
|
|
170 |
return false;
|
|
171 |
|
|
172 |
DelegationPermission that = (DelegationPermission) obj;
|
|
173 |
return implies(that);
|
|
174 |
}
|
|
175 |
|
|
176 |
/**
|
|
177 |
* Returns the hash code value for this object.
|
|
178 |
*
|
|
179 |
* @return a hash code value for this object.
|
|
180 |
*/
|
|
181 |
|
|
182 |
public int hashCode() {
|
|
183 |
return getName().hashCode();
|
|
184 |
}
|
|
185 |
|
|
186 |
|
|
187 |
/**
|
|
188 |
* Returns a PermissionCollection object for storing
|
|
189 |
* DelegationPermission objects.
|
|
190 |
* <br>
|
|
191 |
* DelegationPermission objects must be stored in a manner that
|
|
192 |
* allows them to be inserted into the collection in any order, but
|
|
193 |
* that also enables the PermissionCollection implies method to
|
|
194 |
* be implemented in an efficient (and consistent) manner.
|
|
195 |
*
|
|
196 |
* @return a new PermissionCollection object suitable for storing
|
|
197 |
* DelegationPermissions.
|
|
198 |
*/
|
|
199 |
|
|
200 |
public PermissionCollection newPermissionCollection() {
|
|
201 |
return new KrbDelegationPermissionCollection();
|
|
202 |
}
|
|
203 |
|
|
204 |
/**
|
|
205 |
* WriteObject is called to save the state of the DelegationPermission
|
|
206 |
* to a stream. The actions are serialized, and the superclass
|
|
207 |
* takes care of the name.
|
|
208 |
*/
|
|
209 |
private synchronized void writeObject(java.io.ObjectOutputStream s)
|
|
210 |
throws IOException
|
|
211 |
{
|
|
212 |
s.defaultWriteObject();
|
|
213 |
}
|
|
214 |
|
|
215 |
/**
|
|
216 |
* readObject is called to restore the state of the
|
|
217 |
* DelegationPermission from a stream.
|
|
218 |
*/
|
|
219 |
private synchronized void readObject(java.io.ObjectInputStream s)
|
|
220 |
throws IOException, ClassNotFoundException
|
|
221 |
{
|
|
222 |
// Read in the action, then initialize the rest
|
|
223 |
s.defaultReadObject();
|
|
224 |
init(getName());
|
|
225 |
}
|
|
226 |
|
|
227 |
/*
|
|
228 |
public static void main(String args[]) throws Exception {
|
|
229 |
DelegationPermission this_ =
|
|
230 |
new DelegationPermission(args[0]);
|
|
231 |
DelegationPermission that_ =
|
|
232 |
new DelegationPermission(args[1]);
|
|
233 |
System.out.println("-----\n");
|
|
234 |
System.out.println("this.implies(that) = " + this_.implies(that_));
|
|
235 |
System.out.println("-----\n");
|
|
236 |
System.out.println("this = "+this_);
|
|
237 |
System.out.println("-----\n");
|
|
238 |
System.out.println("that = "+that_);
|
|
239 |
System.out.println("-----\n");
|
|
240 |
|
|
241 |
KrbDelegationPermissionCollection nps =
|
|
242 |
new KrbDelegationPermissionCollection();
|
|
243 |
nps.add(this_);
|
|
244 |
nps.add(new DelegationPermission("\"host/foo.example.com@EXAMPLE.COM\" \"CN=Gary Ellison/OU=JSN/O=SUNW/L=Palo Alto/ST=CA/C=US\""));
|
|
245 |
try {
|
|
246 |
nps.add(new DelegationPermission("host/foo.example.com@EXAMPLE.COM \"CN=Gary Ellison/OU=JSN/O=SUNW/L=Palo Alto/ST=CA/C=US\""));
|
|
247 |
} catch (Exception e) {
|
|
248 |
System.err.println(e);
|
|
249 |
}
|
|
250 |
|
|
251 |
System.out.println("nps.implies(that) = " + nps.implies(that_));
|
|
252 |
System.out.println("-----\n");
|
|
253 |
|
|
254 |
Enumeration e = nps.elements();
|
|
255 |
|
|
256 |
while (e.hasMoreElements()) {
|
|
257 |
DelegationPermission x =
|
|
258 |
(DelegationPermission) e.nextElement();
|
|
259 |
System.out.println("nps.e = " + x);
|
|
260 |
}
|
|
261 |
}
|
|
262 |
*/
|
|
263 |
}
|
|
264 |
|
|
265 |
|
|
266 |
final class KrbDelegationPermissionCollection extends PermissionCollection
|
|
267 |
implements java.io.Serializable {
|
|
268 |
|
|
269 |
// Not serialized; see serialization section at end of class.
|
|
270 |
private transient List<Permission> perms;
|
|
271 |
|
|
272 |
public KrbDelegationPermissionCollection() {
|
|
273 |
perms = new ArrayList<Permission>();
|
|
274 |
}
|
|
275 |
|
|
276 |
|
|
277 |
/**
|
|
278 |
* Check and see if this collection of permissions implies the permissions
|
|
279 |
* expressed in "permission".
|
|
280 |
*
|
|
281 |
* @param p the Permission object to compare
|
|
282 |
*
|
|
283 |
* @return true if "permission" is a proper subset of a permission in
|
|
284 |
* the collection, false if not.
|
|
285 |
*/
|
|
286 |
|
|
287 |
public boolean implies(Permission permission) {
|
|
288 |
if (! (permission instanceof DelegationPermission))
|
|
289 |
return false;
|
|
290 |
|
|
291 |
synchronized (this) {
|
|
292 |
for (Permission x : perms) {
|
|
293 |
if (x.implies(permission))
|
|
294 |
return true;
|
|
295 |
}
|
|
296 |
}
|
|
297 |
return false;
|
|
298 |
|
|
299 |
}
|
|
300 |
|
|
301 |
/**
|
|
302 |
* Adds a permission to the DelegationPermissions. The key for
|
|
303 |
* the hash is the name.
|
|
304 |
*
|
|
305 |
* @param permission the Permission object to add.
|
|
306 |
*
|
|
307 |
* @exception IllegalArgumentException - if the permission is not a
|
|
308 |
* DelegationPermission
|
|
309 |
*
|
|
310 |
* @exception SecurityException - if this PermissionCollection object
|
|
311 |
* has been marked readonly
|
|
312 |
*/
|
|
313 |
|
|
314 |
public void add(Permission permission) {
|
|
315 |
if (! (permission instanceof DelegationPermission))
|
|
316 |
throw new IllegalArgumentException("invalid permission: "+
|
|
317 |
permission);
|
|
318 |
if (isReadOnly())
|
|
319 |
throw new SecurityException("attempt to add a Permission to a readonly PermissionCollection");
|
|
320 |
|
|
321 |
synchronized (this) {
|
|
322 |
perms.add(0, permission);
|
|
323 |
}
|
|
324 |
}
|
|
325 |
|
|
326 |
/**
|
|
327 |
* Returns an enumeration of all the DelegationPermission objects
|
|
328 |
* in the container.
|
|
329 |
*
|
|
330 |
* @return an enumeration of all the DelegationPermission objects.
|
|
331 |
*/
|
|
332 |
|
|
333 |
public Enumeration<Permission> elements() {
|
|
334 |
// Convert Iterator into Enumeration
|
|
335 |
synchronized (this) {
|
|
336 |
return Collections.enumeration(perms);
|
|
337 |
}
|
|
338 |
}
|
|
339 |
|
|
340 |
private static final long serialVersionUID = -3383936936589966948L;
|
|
341 |
|
|
342 |
// Need to maintain serialization interoperability with earlier releases,
|
|
343 |
// which had the serializable field:
|
|
344 |
// private Vector permissions;
|
|
345 |
/**
|
|
346 |
* @serialField permissions java.util.Vector
|
|
347 |
* A list of DelegationPermission objects.
|
|
348 |
*/
|
|
349 |
private static final ObjectStreamField[] serialPersistentFields = {
|
|
350 |
new ObjectStreamField("permissions", Vector.class),
|
|
351 |
};
|
|
352 |
|
|
353 |
/**
|
|
354 |
* @serialData "permissions" field (a Vector containing the DelegationPermissions).
|
|
355 |
*/
|
|
356 |
/*
|
|
357 |
* Writes the contents of the perms field out as a Vector for
|
|
358 |
* serialization compatibility with earlier releases.
|
|
359 |
*/
|
|
360 |
private void writeObject(ObjectOutputStream out) throws IOException {
|
|
361 |
// Don't call out.defaultWriteObject()
|
|
362 |
|
|
363 |
// Write out Vector
|
|
364 |
Vector<Permission> permissions = new Vector<Permission>(perms.size());
|
|
365 |
|
|
366 |
synchronized (this) {
|
|
367 |
permissions.addAll(perms);
|
|
368 |
}
|
|
369 |
|
|
370 |
ObjectOutputStream.PutField pfields = out.putFields();
|
|
371 |
pfields.put("permissions", permissions);
|
|
372 |
out.writeFields();
|
|
373 |
}
|
|
374 |
|
|
375 |
/*
|
|
376 |
* Reads in a Vector of DelegationPermissions and saves them in the perms field.
|
|
377 |
*/
|
|
378 |
private void readObject(ObjectInputStream in) throws IOException,
|
|
379 |
ClassNotFoundException {
|
|
380 |
// Don't call defaultReadObject()
|
|
381 |
|
|
382 |
// Read in serialized fields
|
|
383 |
ObjectInputStream.GetField gfields = in.readFields();
|
|
384 |
|
|
385 |
// Get the one we want
|
|
386 |
Vector<Permission> permissions =
|
|
387 |
(Vector<Permission>)gfields.get("permissions", null);
|
|
388 |
perms = new ArrayList<Permission>(permissions.size());
|
|
389 |
perms.addAll(permissions);
|
|
390 |
}
|
|
391 |
}
|