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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2011, 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.jca; | ||
| 27 | |||
| 28 | import java.util.*; | ||
| 29 | |||
| 30 | import java.security.Provider; | ||
| 31 | import java.security.Security; | ||
| 32 | |||
| 33 | /** | ||
| 34 | * Collection of methods to get and set provider list. Also includes | ||
| 35 | * special code for the provider list during JAR verification. | ||
| 36 | * | ||
| 37 | * @author Andreas Sterbenz | ||
| 38 | * @since 1.5 | ||
| 39 | */ | ||
| 40 | public class Providers { | ||
| 41 | |||
| 42 | private static final ThreadLocal<ProviderList> threadLists = | ||
| 43 | new InheritableThreadLocal<>(); | ||
| 44 | |||
| 45 | // number of threads currently using thread-local provider lists | ||
| 46 | // tracked to allow an optimization if == 0 | ||
| 47 | private static volatile int threadListsUsed; | ||
| 48 | |||
| 49 | // current system-wide provider list | ||
| 50 | // Note volatile immutable object, so no synchronization needed. | ||
| 51 | private static volatile ProviderList providerList; | ||
| 52 | |||
| 53 | static { | ||
| 54 | // set providerList to empty list first in case initialization somehow | ||
| 55 | // triggers a getInstance() call (although that should not happen) | ||
| 56 | providerList = ProviderList.EMPTY; | ||
| 57 | providerList = ProviderList.fromSecurityProperties(); | ||
| 58 | } | ||
| 59 | |||
| 60 | private Providers() { | ||
| 61 | // empty | ||
| 62 | } | ||
| 63 | |||
| 64 | // we need special handling to resolve circularities when loading | ||
| 65 | // signed JAR files during startup. The code below is part of that. | ||
| 66 | |||
| 67 | // Basically, before we load data from a signed JAR file, we parse | ||
| 68 | // the PKCS#7 file and verify the signature. We need a | ||
| 69 | // CertificateFactory, Signatures, etc. to do that. We have to make | ||
| 70 | // sure that we do not try to load the implementation from the JAR | ||
| 71 | // file we are just verifying. | ||
| 72 | // | ||
| 73 | // To avoid that, we use different provider settings during JAR | ||
| 74 | // verification. However, we do not want those provider settings to | ||
| 75 | // interfere with other parts of the system. Therefore, we make them local | ||
| 76 | // to the Thread executing the JAR verification code. | ||
| 77 | // | ||
| 78 | // The code here is used by sun.security.util.SignatureFileVerifier. | ||
| 79 | // See there for details. | ||
| 80 | |||
| 81 | private static final String BACKUP_PROVIDER_CLASSNAME = | ||
| 82 | "sun.security.provider.VerificationProvider"; | ||
| 83 | |||
| 84 | // Hardcoded classnames of providers to use for JAR verification. | ||
| 85 | // MUST NOT be on the bootclasspath and not in signed JAR files. | ||
| 86 | private static final String[] jarVerificationProviders = { | ||
| 87 | "sun.security.provider.Sun", | ||
| 88 | "sun.security.rsa.SunRsaSign", | ||
| 89 | // Note: SunEC *is* in a signed JAR file, but it's not signed | ||
| 90 | // by EC itself. So it's still safe to be listed here. | ||
| 91 | "sun.security.ec.SunEC", | ||
| 92 | BACKUP_PROVIDER_CLASSNAME, | ||
| 93 | }; | ||
| 94 | |||
| 95 | // Return to Sun provider or its backup. | ||
| 96 | // This method should only be called by | ||
| 97 | // sun.security.util.ManifestEntryVerifier and java.security.SecureRandom. | ||
| 98 | public static Provider getSunProvider() { | ||
| 99 | try { | ||
| 100 | Class clazz = Class.forName(jarVerificationProviders[0]); | ||
| 101 | return (Provider)clazz.newInstance(); | ||
| 102 | } catch (Exception e) { | ||
| 103 | try { | ||
| 104 | Class clazz = Class.forName(BACKUP_PROVIDER_CLASSNAME); | ||
| 105 | return (Provider)clazz.newInstance(); | ||
| 106 | } catch (Exception ee) { | ||
| 107 | throw new RuntimeException("Sun provider not found", e); | ||
| 108 | } | ||
| 109 | } | ||
| 110 | } | ||
| 111 | |||
| 112 | /** | ||
| 113 | * Start JAR verification. This sets a special provider list for | ||
| 114 | * the current thread. You MUST save the return value from this | ||
| 115 | * method and you MUST call stopJarVerification() with that object | ||
| 116 | * once you are done. | ||
| 117 | */ | ||
| 118 | public static Object startJarVerification() { | ||
| 119 | ProviderList currentList = getProviderList(); | ||
| 120 | ProviderList jarList = currentList.getJarList(jarVerificationProviders); | ||
| 121 | // return the old thread-local provider list, usually null | ||
| 122 | return beginThreadProviderList(jarList); | ||
| 123 | } | ||
| 124 | |||
| 125 | /** | ||
| 126 | * Stop JAR verification. Call once you have completed JAR verification. | ||
| 127 | */ | ||
| 128 | public static void stopJarVerification(Object obj) { | ||
| 129 | // restore old thread-local provider list | ||
| 130 | endThreadProviderList((ProviderList)obj); | ||
| 131 | } | ||
| 132 | |||
| 133 | /** | ||
| 134 | * Return the current ProviderList. If the thread-local list is set, | ||
| 135 | * it is returned. Otherwise, the system wide list is returned. | ||
| 136 | */ | ||
| 137 | public static ProviderList getProviderList() { | ||
| 138 | ProviderList list = getThreadProviderList(); | ||
| 139 | if (list == null) { | ||
| 140 | list = getSystemProviderList(); | ||
| 141 | } | ||
| 142 | return list; | ||
| 143 | } | ||
| 144 | |||
| 145 | /** | ||
| 146 | * Set the current ProviderList. Affects the thread-local list if set, | ||
| 147 | * otherwise the system wide list. | ||
| 148 | */ | ||
| 149 | public static void setProviderList(ProviderList newList) { | ||
| 150 | if (getThreadProviderList() == null) { | ||
| 151 | setSystemProviderList(newList); | ||
| 152 | } else { | ||
| 153 | changeThreadProviderList(newList); | ||
| 154 | } | ||
| 155 | } | ||
| 156 | |||
| 157 | /** | ||
| 158 | * Get the full provider list with invalid providers (those that | ||
| 159 | * could not be loaded) removed. This is the list we need to | ||
| 160 | * present to applications. | ||
| 161 | */ | ||
| 162 | public static ProviderList getFullProviderList() { | ||
| 163 | ProviderList list; | ||
| 164 | synchronized (Providers.class) { | ||
| 165 | list = getThreadProviderList(); | ||
| 166 | if (list != null) { | ||
| 167 | ProviderList newList = list.removeInvalid(); | ||
| 168 | if (newList != list) { | ||
| 169 | changeThreadProviderList(newList); | ||
| 170 | list = newList; | ||
| 171 | } | ||
| 172 | return list; | ||
| 173 | } | ||
| 174 | } | ||
| 175 | list = getSystemProviderList(); | ||
| 176 | ProviderList newList = list.removeInvalid(); | ||
| 177 | if (newList != list) { | ||
| 178 | setSystemProviderList(newList); | ||
| 179 | list = newList; | ||
| 180 | } | ||
| 181 | return list; | ||
| 182 | } | ||
| 183 | |||
| 184 | private static ProviderList getSystemProviderList() { | ||
| 185 | return providerList; | ||
| 186 | } | ||
| 187 | |||
| 188 | private static void setSystemProviderList(ProviderList list) { | ||
| 189 | providerList = list; | ||
| 190 | } | ||
| 191 | |||
| 192 | public static ProviderList getThreadProviderList() { | ||
| 193 | // avoid accessing the threadlocal if none are currently in use | ||
| 194 | // (first use of ThreadLocal.get() for a Thread allocates a Map) | ||
| 195 | if (threadListsUsed == 0) { | ||
| 196 | return null; | ||
| 197 | } | ||
| 198 | return threadLists.get(); | ||
| 199 | } | ||
| 200 | |||
| 201 | // Change the thread local provider list. Use only if the current thread | ||
| 202 | // is already using a thread local list and you want to change it in place. | ||
| 203 | // In other cases, use the begin/endThreadProviderList() methods. | ||
| 204 | private static void changeThreadProviderList(ProviderList list) { | ||
| 205 | threadLists.set(list); | ||
| 206 | } | ||
| 207 | |||
| 208 | /** | ||
| 209 | * Methods to manipulate the thread local provider list. It is for use by | ||
| 210 | * JAR verification (see above) and the SunJSSE FIPS mode only. | ||
| 211 | * | ||
| 212 | * It should be used as follows: | ||
| 213 | * | ||
| 214 | * ProviderList list = ...; | ||
| 215 | * ProviderList oldList = Providers.beginThreadProviderList(list); | ||
| 216 | * try { | ||
| 217 | * // code that needs thread local provider list | ||
| 218 | * } finally { | ||
| 219 | * Providers.endThreadProviderList(oldList); | ||
| 220 | * } | ||
| 221 | * | ||
| 222 | */ | ||
| 223 | |||
| 224 | public static synchronized ProviderList beginThreadProviderList(ProviderList list) { | ||
| 225 | if (ProviderList.debug != null) { | ||
| 226 | ProviderList.debug.println("ThreadLocal providers: " + list); | ||
| 227 | } | ||
| 228 | ProviderList oldList = threadLists.get(); | ||
| 229 | threadListsUsed++; | ||
| 230 | threadLists.set(list); | ||
| 231 | return oldList; | ||
| 232 | } | ||
| 233 | |||
| 234 | public static synchronized void endThreadProviderList(ProviderList list) { | ||
| 235 | if (list == null) { | ||
| 236 | if (ProviderList.debug != null) { | ||
| 237 | ProviderList.debug.println("Disabling ThreadLocal providers"); | ||
| 238 | } | ||
| 239 | threadLists.remove(); | ||
| 240 | } else { | ||
| 241 | if (ProviderList.debug != null) { | ||
| 242 | ProviderList.debug.println | ||
| 243 | ("Restoring previous ThreadLocal providers: " + list); | ||
| 244 | } | ||
| 245 | threadLists.set(list); | ||
| 246 | } | ||
| 247 | threadListsUsed--; | ||
| 248 | } | ||
| 249 | |||
| 250 | } | ||