1 /*
2 * Copyright (c) 2002, 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.misc;
27
28 import java.util.jar.JarFile;
29 import java.io.Console;
30 import java.io.FileDescriptor;
31 import java.security.ProtectionDomain;
32
33 import java.security.AccessController;
34
35 /** A repository of "shared secrets", which are a mechanism for
36 calling implementation-private methods in another package without
37 using reflection. A package-private class implements a public
38 interface and provides the ability to call package-private methods
39 within that package; the object implementing that interface is
40 provided through a third package to which access is restricted.
41 This framework avoids the primary disadvantage of using reflection
42 for this purpose, namely the loss of compile-time checking. */
43
44 public class SharedSecrets {
45 private static final Unsafe unsafe = Unsafe.getUnsafe();
46 private static JavaUtilJarAccess javaUtilJarAccess;
47 private static JavaLangAccess javaLangAccess;
48 private static JavaLangRefAccess javaLangRefAccess;
49 private static JavaIOAccess javaIOAccess;
50 private static JavaNetAccess javaNetAccess;
51 private static JavaNetHttpCookieAccess javaNetHttpCookieAccess;
52 private static JavaNioAccess javaNioAccess;
53 private static JavaIOFileDescriptorAccess javaIOFileDescriptorAccess;
54 private static JavaSecurityProtectionDomainAccess javaSecurityProtectionDomainAccess;
55 private static JavaSecurityAccess javaSecurityAccess;
56 private static JavaUtilZipFileAccess javaUtilZipFileAccess;
57 private static JavaAWTAccess javaAWTAccess;
58
59 public static JavaUtilJarAccess javaUtilJarAccess() {
60 if (javaUtilJarAccess == null) {
61 // Ensure JarFile is initialized; we know that that class
62 // provides the shared secret
63 unsafe.ensureClassInitialized(JarFile.class);
64 }
65 return javaUtilJarAccess;
66 }
67
68 public static void setJavaUtilJarAccess(JavaUtilJarAccess access) {
69 javaUtilJarAccess = access;
70 }
71
72 public static void setJavaLangAccess(JavaLangAccess jla) {
73 javaLangAccess = jla;
74 }
75
76 public static JavaLangAccess getJavaLangAccess() {
77 return javaLangAccess;
78 }
79
80 public static void setJavaLangRefAccess(JavaLangRefAccess jlra) {
81 javaLangRefAccess = jlra;
82 }
83
84 public static JavaLangRefAccess getJavaLangRefAccess() {
85 return javaLangRefAccess;
86 }
87
88 public static void setJavaNetAccess(JavaNetAccess jna) {
89 javaNetAccess = jna;
90 }
91
92 public static JavaNetAccess getJavaNetAccess() {
93 return javaNetAccess;
94 }
95
96 public static void setJavaNetHttpCookieAccess(JavaNetHttpCookieAccess a) {
97 javaNetHttpCookieAccess = a;
98 }
99
100 public static JavaNetHttpCookieAccess getJavaNetHttpCookieAccess() {
101 if (javaNetHttpCookieAccess == null)
102 unsafe.ensureClassInitialized(java.net.HttpCookie.class);
103 return javaNetHttpCookieAccess;
104 }
105
106 public static void setJavaNioAccess(JavaNioAccess jna) {
107 javaNioAccess = jna;
108 }
109
110 public static JavaNioAccess getJavaNioAccess() {
111 if (javaNioAccess == null) {
112 // Ensure java.nio.ByteOrder is initialized; we know that
113 // this class initializes java.nio.Bits that provides the
114 // shared secret.
115 unsafe.ensureClassInitialized(java.nio.ByteOrder.class);
116 }
117 return javaNioAccess;
118 }
119
120 public static void setJavaIOAccess(JavaIOAccess jia) {
121 javaIOAccess = jia;
122 }
123
124 public static JavaIOAccess getJavaIOAccess() {
125 if (javaIOAccess == null) {
126 unsafe.ensureClassInitialized(Console.class);
127 }
128 return javaIOAccess;
129 }
130
131 public static void setJavaIOFileDescriptorAccess(JavaIOFileDescriptorAccess jiofda) {
132 javaIOFileDescriptorAccess = jiofda;
133 }
134
135 public static JavaIOFileDescriptorAccess getJavaIOFileDescriptorAccess() {
136 if (javaIOFileDescriptorAccess == null)
137 unsafe.ensureClassInitialized(FileDescriptor.class);
138
139 return javaIOFileDescriptorAccess;
140 }
141
142 public static void setJavaSecurityProtectionDomainAccess
143 (JavaSecurityProtectionDomainAccess jspda) {
144 javaSecurityProtectionDomainAccess = jspda;
145 }
146
147 public static JavaSecurityProtectionDomainAccess
148 getJavaSecurityProtectionDomainAccess() {
149 if (javaSecurityProtectionDomainAccess == null)
150 unsafe.ensureClassInitialized(ProtectionDomain.class);
151 return javaSecurityProtectionDomainAccess;
152 }
153
154 public static void setJavaSecurityAccess(JavaSecurityAccess jsa) {
155 javaSecurityAccess = jsa;
156 }
157
158 public static JavaSecurityAccess getJavaSecurityAccess() {
159 if (javaSecurityAccess == null) {
160 unsafe.ensureClassInitialized(AccessController.class);
161 }
162 return javaSecurityAccess;
163 }
164
165 public static JavaUtilZipFileAccess getJavaUtilZipFileAccess() {
166 if (javaUtilZipFileAccess == null)
167 unsafe.ensureClassInitialized(java.util.zip.ZipFile.class);
168 return javaUtilZipFileAccess;
169 }
170
171 public static void setJavaUtilZipFileAccess(JavaUtilZipFileAccess access) {
172 javaUtilZipFileAccess = access;
173 }
174
175 public static void setJavaAWTAccess(JavaAWTAccess jaa) {
176 javaAWTAccess = jaa;
177 }
178
179 public static JavaAWTAccess getJavaAWTAccess() {
180 // this may return null in which case calling code needs to
181 // provision for.
182 if (javaAWTAccess == null) {
183 return null;
184 }
185 return javaAWTAccess;
186 }
187 }