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 }