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 JavaIOAccess javaIOAccess;
49 private static JavaNetAccess javaNetAccess;
50 private static JavaNetHttpCookieAccess javaNetHttpCookieAccess;
51 private static JavaNioAccess javaNioAccess;
52 private static JavaIOFileDescriptorAccess javaIOFileDescriptorAccess;
53 private static JavaSecurityProtectionDomainAccess javaSecurityProtectionDomainAccess;
54 private static JavaSecurityAccess javaSecurityAccess;
55 private static JavaUtilZipFileAccess javaUtilZipFileAccess;
56 private static JavaAWTAccess javaAWTAccess;
57
58 public static JavaUtilJarAccess javaUtilJarAccess() {
59 if (javaUtilJarAccess == null) {
60 // Ensure JarFile is initialized; we know that that class
61 // provides the shared secret
62 unsafe.ensureClassInitialized(JarFile.class);
63 }
64 return javaUtilJarAccess;
65 }
66
67 public static void setJavaUtilJarAccess(JavaUtilJarAccess access) {
68 javaUtilJarAccess = access;
69 }
70
71 public static void setJavaLangAccess(JavaLangAccess jla) {
72 javaLangAccess = jla;
73 }
74
75 public static JavaLangAccess getJavaLangAccess() {
76 return javaLangAccess;
77 }
78
79 public static void setJavaNetAccess(JavaNetAccess jna) {
80 javaNetAccess = jna;
81 }
82
83 public static JavaNetAccess getJavaNetAccess() {
84 return javaNetAccess;
85 }
86
87 public static void setJavaNetHttpCookieAccess(JavaNetHttpCookieAccess a) {
88 javaNetHttpCookieAccess = a;
89 }
90
91 public static JavaNetHttpCookieAccess getJavaNetHttpCookieAccess() {
92 if (javaNetHttpCookieAccess == null)
93 unsafe.ensureClassInitialized(java.net.HttpCookie.class);
94 return javaNetHttpCookieAccess;
95 }
96
97 public static void setJavaNioAccess(JavaNioAccess jna) {
98 javaNioAccess = jna;
99 }
100
101 public static JavaNioAccess getJavaNioAccess() {
102 if (javaNioAccess == null) {
103 // Ensure java.nio.ByteOrder is initialized; we know that
104 // this class initializes java.nio.Bits that provides the
105 // shared secret.
106 unsafe.ensureClassInitialized(java.nio.ByteOrder.class);
107 }
108 return javaNioAccess;
109 }
110
111 public static void setJavaIOAccess(JavaIOAccess jia) {
112 javaIOAccess = jia;
113 }
114
115 public static JavaIOAccess getJavaIOAccess() {
116 if (javaIOAccess == null) {
117 unsafe.ensureClassInitialized(Console.class);
118 }
119 return javaIOAccess;
120 }
121
122 public static void setJavaIOFileDescriptorAccess(JavaIOFileDescriptorAccess jiofda) {
123 javaIOFileDescriptorAccess = jiofda;
124 }
125
126 public static JavaIOFileDescriptorAccess getJavaIOFileDescriptorAccess() {
127 if (javaIOFileDescriptorAccess == null)
128 unsafe.ensureClassInitialized(FileDescriptor.class);
129
130 return javaIOFileDescriptorAccess;
131 }
132
133 public static void setJavaSecurityProtectionDomainAccess
134 (JavaSecurityProtectionDomainAccess jspda) {
135 javaSecurityProtectionDomainAccess = jspda;
136 }
137
138 public static JavaSecurityProtectionDomainAccess
139 getJavaSecurityProtectionDomainAccess() {
140 if (javaSecurityProtectionDomainAccess == null)
141 unsafe.ensureClassInitialized(ProtectionDomain.class);
142 return javaSecurityProtectionDomainAccess;
143 }
144
145 public static void setJavaSecurityAccess(JavaSecurityAccess jsa) {
146 javaSecurityAccess = jsa;
147 }
148
149 public static JavaSecurityAccess getJavaSecurityAccess() {
150 if (javaSecurityAccess == null) {
151 unsafe.ensureClassInitialized(AccessController.class);
152 }
153 return javaSecurityAccess;
154 }
155
156 public static JavaUtilZipFileAccess getJavaUtilZipFileAccess() {
157 if (javaUtilZipFileAccess == null)
158 unsafe.ensureClassInitialized(java.util.zip.ZipFile.class);
159 return javaUtilZipFileAccess;
160 }
161
162 public static void setJavaUtilZipFileAccess(JavaUtilZipFileAccess access) {
163 javaUtilZipFileAccess = access;
164 }
165
166 public static void setJavaAWTAccess(JavaAWTAccess jaa) {
167 javaAWTAccess = jaa;
168 }
169
170 public static JavaAWTAccess getJavaAWTAccess() {
171 // this may return null in which case calling code needs to
172 // provision for.
173 if (javaAWTAccess == null) {
174 return null;
175 }
176 return javaAWTAccess;
177 }
178 }