1 /* 2 * Copyright (c) 2002, 2015, 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 jdk.internal.misc; 27 28 import java.util.jar.JarFile; 29 import java.io.Console; 30 import java.io.FileDescriptor; 31 import java.security.ProtectionDomain; 32 import java.security.AccessController; 33 import jdk.internal.misc.Unsafe; 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 JavaLangInvokeAccess javaLangInvokeAccess; 49 private static JavaLangRefAccess javaLangRefAccess; 50 private static JavaIOAccess javaIOAccess; 51 private static JavaNetAccess javaNetAccess; 52 private static JavaNetInetAddressAccess javaNetInetAddressAccess; 53 private static JavaNetHttpCookieAccess javaNetHttpCookieAccess; 54 private static JavaNioAccess javaNioAccess; 55 private static JavaIOFileDescriptorAccess javaIOFileDescriptorAccess; 56 private static JavaSecurityProtectionDomainAccess javaSecurityProtectionDomainAccess; 57 private static JavaSecurityAccess javaSecurityAccess; 58 private static JavaUtilZipFileAccess javaUtilZipFileAccess; 59 private static JavaAWTAccess javaAWTAccess; 60 private static JavaAWTFontAccess javaAWTFontAccess; 61 private static JavaBeansAccess javaBeansAccess; 62 63 public static JavaUtilJarAccess javaUtilJarAccess() { 64 if (javaUtilJarAccess == null) { 65 // Ensure JarFile is initialized; we know that that class 66 // provides the shared secret 67 unsafe.ensureClassInitialized(JarFile.class); 68 } 69 return javaUtilJarAccess; 70 } 71 72 public static void setJavaUtilJarAccess(JavaUtilJarAccess access) { 73 javaUtilJarAccess = access; 74 } 75 76 public static void setJavaLangAccess(JavaLangAccess jla) { 77 javaLangAccess = jla; 78 } 79 80 public static JavaLangAccess getJavaLangAccess() { 81 return javaLangAccess; 82 } 83 84 public static void setJavaLangInvokeAccess(JavaLangInvokeAccess jlia) { 85 javaLangInvokeAccess = jlia; 86 } 87 88 public static JavaLangInvokeAccess getJavaLangInvokeAccess() { 89 if (javaLangInvokeAccess == null) { 90 try { 91 Class<?> c = Class.forName("java.lang.invoke.MemberName"); 92 unsafe.ensureClassInitialized(c); 93 } catch (ClassNotFoundException e) {}; 94 } 95 return javaLangInvokeAccess; 96 } 97 98 public static void setJavaLangRefAccess(JavaLangRefAccess jlra) { 99 javaLangRefAccess = jlra; 100 } 101 102 public static JavaLangRefAccess getJavaLangRefAccess() { 103 return javaLangRefAccess; 104 } 105 106 public static void setJavaNetAccess(JavaNetAccess jna) { 107 javaNetAccess = jna; 108 } 109 110 public static JavaNetAccess getJavaNetAccess() { 111 if (javaNetAccess == null) 112 unsafe.ensureClassInitialized(java.net.URLClassLoader.class); 113 return javaNetAccess; 114 } 115 116 public static void setJavaNetInetAddressAccess(JavaNetInetAddressAccess jna) { 117 javaNetInetAddressAccess = jna; 118 } 119 120 public static JavaNetInetAddressAccess getJavaNetInetAddressAccess() { 121 return javaNetInetAddressAccess; 122 } 123 124 public static void setJavaNetHttpCookieAccess(JavaNetHttpCookieAccess a) { 125 javaNetHttpCookieAccess = a; 126 } 127 128 public static JavaNetHttpCookieAccess getJavaNetHttpCookieAccess() { 129 if (javaNetHttpCookieAccess == null) 130 unsafe.ensureClassInitialized(java.net.HttpCookie.class); 131 return javaNetHttpCookieAccess; 132 } 133 134 public static void setJavaNioAccess(JavaNioAccess jna) { 135 javaNioAccess = jna; 136 } 137 138 public static JavaNioAccess getJavaNioAccess() { 139 if (javaNioAccess == null) { 140 // Ensure java.nio.ByteOrder is initialized; we know that 141 // this class initializes java.nio.Bits that provides the 142 // shared secret. 143 unsafe.ensureClassInitialized(java.nio.ByteOrder.class); 144 } 145 return javaNioAccess; 146 } 147 148 public static void setJavaIOAccess(JavaIOAccess jia) { 149 javaIOAccess = jia; 150 } 151 152 public static JavaIOAccess getJavaIOAccess() { 153 if (javaIOAccess == null) { 154 unsafe.ensureClassInitialized(Console.class); 155 } 156 return javaIOAccess; 157 } 158 159 public static void setJavaIOFileDescriptorAccess(JavaIOFileDescriptorAccess jiofda) { 160 javaIOFileDescriptorAccess = jiofda; 161 } 162 163 public static JavaIOFileDescriptorAccess getJavaIOFileDescriptorAccess() { 164 if (javaIOFileDescriptorAccess == null) 165 unsafe.ensureClassInitialized(FileDescriptor.class); 166 167 return javaIOFileDescriptorAccess; 168 } 169 170 public static void setJavaSecurityProtectionDomainAccess 171 (JavaSecurityProtectionDomainAccess jspda) { 172 javaSecurityProtectionDomainAccess = jspda; 173 } 174 175 public static JavaSecurityProtectionDomainAccess 176 getJavaSecurityProtectionDomainAccess() { 177 if (javaSecurityProtectionDomainAccess == null) 178 unsafe.ensureClassInitialized(ProtectionDomain.class); 179 return javaSecurityProtectionDomainAccess; 180 } 181 182 public static void setJavaSecurityAccess(JavaSecurityAccess jsa) { 183 javaSecurityAccess = jsa; 184 } 185 186 public static JavaSecurityAccess getJavaSecurityAccess() { 187 if (javaSecurityAccess == null) { 188 unsafe.ensureClassInitialized(AccessController.class); 189 } 190 return javaSecurityAccess; 191 } 192 193 public static JavaUtilZipFileAccess getJavaUtilZipFileAccess() { 194 if (javaUtilZipFileAccess == null) 195 unsafe.ensureClassInitialized(java.util.zip.ZipFile.class); 196 return javaUtilZipFileAccess; 197 } 198 199 public static void setJavaUtilZipFileAccess(JavaUtilZipFileAccess access) { 200 javaUtilZipFileAccess = access; 201 } 202 203 public static void setJavaAWTAccess(JavaAWTAccess jaa) { 204 javaAWTAccess = jaa; 205 } 206 207 public static JavaAWTAccess getJavaAWTAccess() { 208 // this may return null in which case calling code needs to 209 // provision for. 210 return javaAWTAccess; 211 } 212 213 public static void setJavaAWTFontAccess(JavaAWTFontAccess jafa) { 214 javaAWTFontAccess = jafa; 215 } 216 217 public static JavaAWTFontAccess getJavaAWTFontAccess() { 218 // this may return null in which case calling code needs to 219 // provision for. 220 return javaAWTFontAccess; 221 } 222 223 public static JavaBeansAccess getJavaBeansAccess() { 224 return javaBeansAccess; 225 } 226 227 public static void setJavaBeansAccess(JavaBeansAccess access) { 228 javaBeansAccess = access; 229 } 230 }