1 /*
2 * Copyright (c) 2011, 2012, 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.security.krb5;
27
28 import java.io.IOException;
29 import java.util.Collection;
30 import java.util.Hashtable;
31 import java.util.Vector;
32
33
34 public class SCDynamicStoreConfig {
35 private static native void installNotificationCallback();
36 private static native Hashtable<String, Object> getKerberosConfig();
37 private static boolean DEBUG = sun.security.krb5.internal.Krb5.DEBUG;
38
39 static {
40 boolean isMac = java.security.AccessController.doPrivileged(
41 new java.security.PrivilegedAction<Boolean>() {
42 public Boolean run() {
43 String osname = System.getProperty("os.name");
44 if (osname.contains("OS X")) {
45 System.loadLibrary("osxkrb5");
46 return true;
47 }
48 return false;
49 }
50 });
51 if (isMac) installNotificationCallback();
52 }
53
54 private static Vector<String> unwrapHost(
55 Collection<Hashtable<String, String>> c) {
56 Vector<String> vector = new Vector<String>();
57 for (Hashtable<String, String> m : c) {
58 vector.add(m.get("host"));
59 }
60 return vector;
61 }
62
63 /**
64 * convertRealmConfigs: Maps the Object graph that we get from JNI to the
65 * object graph that Config expects. Also the items inside the kdc array
66 * are wrapped inside Hashtables
67 */
68 @SuppressWarnings("unchecked")
69 private static Hashtable<String, Object>
70 convertRealmConfigs(Hashtable<String, ?> configs) {
71 Hashtable<String, Object> realmsTable = new Hashtable<String, Object>();
72
73 for (String realm : configs.keySet()) {
74 // get the kdc
75 Hashtable<String, Collection<?>> map =
76 (Hashtable<String, Collection<?>>) configs.get(realm);
77 Hashtable<String, Vector<String>> realmMap =
78 new Hashtable<String, Vector<String>>();
79
80 // put the kdc into the realmMap
81 Collection<Hashtable<String, String>> kdc =
82 (Collection<Hashtable<String, String>>) map.get("kdc");
83 if (kdc != null) realmMap.put("kdc", unwrapHost(kdc));
84
85 // put the admin server into the realmMap
86 Collection<Hashtable<String, String>> kadmin =
87 (Collection<Hashtable<String, String>>) map.get("kadmin");
88 if (kadmin != null) realmMap.put("admin_server", unwrapHost(kadmin));
89
90 // add the full entry to the realmTable
91 realmsTable.put(realm, realmMap);
92 }
93
94 return realmsTable;
95 }
96
97 /**
98 * Calls down to JNI to get the raw Kerberos Config and maps the object
99 * graph to the one that Kerberos Config in Java expects
100 *
101 * @return
102 * @throws IOException
103 */
104 public static Hashtable<String, Object> getConfig() throws IOException {
105 Hashtable<String, Object> stanzaTable = getKerberosConfig();
106 if (stanzaTable == null) {
107 throw new IOException(
108 "Could not load configuration from SCDynamicStore");
109 }
110 if (DEBUG) System.out.println("Raw map from JNI: " + stanzaTable);
111 return convertNativeConfig(stanzaTable);
112 }
113
114 @SuppressWarnings("unchecked")
115 private static Hashtable<String, Object> convertNativeConfig(
116 Hashtable<String, Object> stanzaTable) {
117 // convert SCDynamicStore realm structure to Java realm structure
118 Hashtable<String, ?> realms =
119 (Hashtable<String, ?>) stanzaTable.get("realms");
120 if (realms != null) {
121 stanzaTable.remove("realms");
122 Hashtable<String, Object> realmsTable = convertRealmConfigs(realms);
123 stanzaTable.put("realms", realmsTable);
124 }
125 WrapAllStringInVector(stanzaTable);
126 if (DEBUG) System.out.println("stanzaTable : " + stanzaTable);
127 return stanzaTable;
128 }
129
130 @SuppressWarnings("unchecked")
131 private static void WrapAllStringInVector(
132 Hashtable<String, Object> stanzaTable) {
133 for (String s: stanzaTable.keySet()) {
134 Object v = stanzaTable.get(s);
135 if (v instanceof Hashtable) {
136 WrapAllStringInVector((Hashtable<String,Object>)v);
137 } else if (v instanceof String) {
138 Vector<String> vec = new Vector<>();
139 vec.add((String)v);
140 stanzaTable.put(s, vec);
141 }
142 }
143 }
144 }