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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 | +} | |