/* * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package sun.security.jca;import java.util.*;import java.security.Provider;import java.security.Security;/** * Collection of methods to get and set provider list. Also includes * special code for the provider list during JAR verification. * * @author Andreas Sterbenz * @since 1.5 */public class Providers { private static final ThreadLocal<ProviderList> threadLists = new InheritableThreadLocal<>(); // number of threads currently using thread-local provider lists // tracked to allow an optimization if == 0 private static volatile int threadListsUsed; // current system-wide provider list // Note volatile immutable object, so no synchronization needed. private static volatile ProviderList providerList; static { // set providerList to empty list first in case initialization somehow // triggers a getInstance() call (although that should not happen) providerList = ProviderList.EMPTY; providerList = ProviderList.fromSecurityProperties(); } private Providers() { // empty } // we need special handling to resolve circularities when loading // signed JAR files during startup. The code below is part of that. // Basically, before we load data from a signed JAR file, we parse // the PKCS#7 file and verify the signature. We need a // CertificateFactory, Signatures, etc. to do that. We have to make // sure that we do not try to load the implementation from the JAR // file we are just verifying. // // To avoid that, we use different provider settings during JAR // verification. However, we do not want those provider settings to // interfere with other parts of the system. Therefore, we make them local // to the Thread executing the JAR verification code. // // The code here is used by sun.security.util.SignatureFileVerifier. // See there for details. private static final String BACKUP_PROVIDER_CLASSNAME = "sun.security.provider.VerificationProvider"; // Hardcoded classnames of providers to use for JAR verification. // MUST NOT be on the bootclasspath and not in signed JAR files. private static final String[] jarVerificationProviders = { "sun.security.provider.Sun", "sun.security.rsa.SunRsaSign", // Note: SunEC *is* in a signed JAR file, but it's not signed // by EC itself. So it's still safe to be listed here. "sun.security.ec.SunEC", BACKUP_PROVIDER_CLASSNAME, }; // Return to Sun provider or its backup. // This method should only be called by // sun.security.util.ManifestEntryVerifier and java.security.SecureRandom. public static Provider getSunProvider() { try { Class clazz = Class.forName(jarVerificationProviders[0]); return (Provider)clazz.newInstance(); } catch (Exception e) { try { Class clazz = Class.forName(BACKUP_PROVIDER_CLASSNAME); return (Provider)clazz.newInstance(); } catch (Exception ee) { throw new RuntimeException("Sun provider not found", e); } } } /** * Start JAR verification. This sets a special provider list for * the current thread. You MUST save the return value from this * method and you MUST call stopJarVerification() with that object * once you are done. */ public static Object startJarVerification() { ProviderList currentList = getProviderList(); ProviderList jarList = currentList.getJarList(jarVerificationProviders); // return the old thread-local provider list, usually null return beginThreadProviderList(jarList); } /** * Stop JAR verification. Call once you have completed JAR verification. */ public static void stopJarVerification(Object obj) { // restore old thread-local provider list endThreadProviderList((ProviderList)obj); } /** * Return the current ProviderList. If the thread-local list is set, * it is returned. Otherwise, the system wide list is returned. */ public static ProviderList getProviderList() { ProviderList list = getThreadProviderList(); if (list == null) { list = getSystemProviderList(); } return list; } /** * Set the current ProviderList. Affects the thread-local list if set, * otherwise the system wide list. */ public static void setProviderList(ProviderList newList) { if (getThreadProviderList() == null) { setSystemProviderList(newList); } else { changeThreadProviderList(newList); } } /** * Get the full provider list with invalid providers (those that * could not be loaded) removed. This is the list we need to * present to applications. */ public static ProviderList getFullProviderList() { ProviderList list; synchronized (Providers.class) { list = getThreadProviderList(); if (list != null) { ProviderList newList = list.removeInvalid(); if (newList != list) { changeThreadProviderList(newList); list = newList; } return list; } } list = getSystemProviderList(); ProviderList newList = list.removeInvalid(); if (newList != list) { setSystemProviderList(newList); list = newList; } return list; } private static ProviderList getSystemProviderList() { return providerList; } private static void setSystemProviderList(ProviderList list) { providerList = list; } public static ProviderList getThreadProviderList() { // avoid accessing the threadlocal if none are currently in use // (first use of ThreadLocal.get() for a Thread allocates a Map) if (threadListsUsed == 0) { return null; } return threadLists.get(); } // Change the thread local provider list. Use only if the current thread // is already using a thread local list and you want to change it in place. // In other cases, use the begin/endThreadProviderList() methods. private static void changeThreadProviderList(ProviderList list) { threadLists.set(list); } /** * Methods to manipulate the thread local provider list. It is for use by * JAR verification (see above) and the SunJSSE FIPS mode only. * * It should be used as follows: * * ProviderList list = ...; * ProviderList oldList = Providers.beginThreadProviderList(list); * try { * // code that needs thread local provider list * } finally { * Providers.endThreadProviderList(oldList); * } * */ public static synchronized ProviderList beginThreadProviderList(ProviderList list) { if (ProviderList.debug != null) { ProviderList.debug.println("ThreadLocal providers: " + list); } ProviderList oldList = threadLists.get(); threadListsUsed++; threadLists.set(list); return oldList; } public static synchronized void endThreadProviderList(ProviderList list) { if (list == null) { if (ProviderList.debug != null) { ProviderList.debug.println("Disabling ThreadLocal providers"); } threadLists.remove(); } else { if (ProviderList.debug != null) { ProviderList.debug.println ("Restoring previous ThreadLocal providers: " + list); } threadLists.set(list); } threadListsUsed--; }}
/*
* Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.security.jca;
import java.util.*;
import java.security.Provider;
import java.security.Security;
/**
* Collection of methods to get and set provider list. Also includes
* special code for the provider list during JAR verification.
*
* @author Andreas Sterbenz
* @since 1.5
*/
public class Providers {
private static final ThreadLocal<ProviderList> threadLists =
new InheritableThreadLocal<>();
// number of threads currently using thread-local provider lists
// tracked to allow an optimization if == 0
private static volatile int threadListsUsed;
// current system-wide provider list
// Note volatile immutable object, so no synchronization needed.
private static volatile ProviderList providerList;
static {
// set providerList to empty list first in case initialization somehow
// triggers a getInstance() call (although that should not happen)
providerList = ProviderList.EMPTY;
providerList = ProviderList.fromSecurityProperties();
}
private Providers() {
// empty
}
// we need special handling to resolve circularities when loading
// signed JAR files during startup. The code below is part of that.
// Basically, before we load data from a signed JAR file, we parse
// the PKCS#7 file and verify the signature. We need a
// CertificateFactory, Signatures, etc. to do that. We have to make
// sure that we do not try to load the implementation from the JAR
// file we are just verifying.
//
// To avoid that, we use different provider settings during JAR
// verification. However, we do not want those provider settings to
// interfere with other parts of the system. Therefore, we make them local
// to the Thread executing the JAR verification code.
//
// The code here is used by sun.security.util.SignatureFileVerifier.
// See there for details.
private static final String BACKUP_PROVIDER_CLASSNAME =
"sun.security.provider.VerificationProvider";
// Hardcoded classnames of providers to use for JAR verification.
// MUST NOT be on the bootclasspath and not in signed JAR files.
private static final String[] jarVerificationProviders = {
"sun.security.provider.Sun",
"sun.security.rsa.SunRsaSign",
// Note: SunEC *is* in a signed JAR file, but it's not signed
// by EC itself. So it's still safe to be listed here.
"sun.security.ec.SunEC",
BACKUP_PROVIDER_CLASSNAME,
};
// Return to Sun provider or its backup.
// This method should only be called by
// sun.security.util.ManifestEntryVerifier and java.security.SecureRandom.
public static Provider getSunProvider() {
try {
Class clazz = Class.forName(jarVerificationProviders[0]);
return (Provider)clazz.newInstance();
} catch (Exception e) {
try {
Class clazz = Class.forName(BACKUP_PROVIDER_CLASSNAME);
return (Provider)clazz.newInstance();
} catch (Exception ee) {
throw new RuntimeException("Sun provider not found", e);
}
}
}
/**
* Start JAR verification. This sets a special provider list for
* the current thread. You MUST save the return value from this
* method and you MUST call stopJarVerification() with that object
* once you are done.
*/
public static Object startJarVerification() {
ProviderList currentList = getProviderList();
ProviderList jarList = currentList.getJarList(jarVerificationProviders);
// return the old thread-local provider list, usually null
return beginThreadProviderList(jarList);
}
/**
* Stop JAR verification. Call once you have completed JAR verification.
*/
public static void stopJarVerification(Object obj) {
// restore old thread-local provider list
endThreadProviderList((ProviderList)obj);
}
/**
* Return the current ProviderList. If the thread-local list is set,
* it is returned. Otherwise, the system wide list is returned.
*/
public static ProviderList getProviderList() {
ProviderList list = getThreadProviderList();
if (list == null) {
list = getSystemProviderList();
}
return list;
}
/**
* Set the current ProviderList. Affects the thread-local list if set,
* otherwise the system wide list.
*/
public static void setProviderList(ProviderList newList) {
if (getThreadProviderList() == null) {
setSystemProviderList(newList);
} else {
changeThreadProviderList(newList);
}
}
/**
* Get the full provider list with invalid providers (those that
* could not be loaded) removed. This is the list we need to
* present to applications.
*/
public static ProviderList getFullProviderList() {
ProviderList list;
synchronized (Providers.class) {
list = getThreadProviderList();
if (list != null) {
ProviderList newList = list.removeInvalid();
if (newList != list) {
changeThreadProviderList(newList);
list = newList;
}
return list;
}
}
list = getSystemProviderList();
ProviderList newList = list.removeInvalid();
if (newList != list) {
setSystemProviderList(newList);
list = newList;
}
return list;
}
private static ProviderList getSystemProviderList() {
return providerList;
}
private static void setSystemProviderList(ProviderList list) {
providerList = list;
}
public static ProviderList getThreadProviderList() {
// avoid accessing the threadlocal if none are currently in use
// (first use of ThreadLocal.get() for a Thread allocates a Map)
if (threadListsUsed == 0) {
return null;
}
return threadLists.get();
}
// Change the thread local provider list. Use only if the current thread
// is already using a thread local list and you want to change it in place.
// In other cases, use the begin/endThreadProviderList() methods.
private static void changeThreadProviderList(ProviderList list) {
threadLists.set(list);
}
/**
* Methods to manipulate the thread local provider list. It is for use by
* JAR verification (see above) and the SunJSSE FIPS mode only.
*
* It should be used as follows:
*
* ProviderList list = ...;
* ProviderList oldList = Providers.beginThreadProviderList(list);
* try {
* // code that needs thread local provider list
* } finally {
* Providers.endThreadProviderList(oldList);
* }
*
*/
public static synchronized ProviderList beginThreadProviderList(ProviderList list) {
if (ProviderList.debug != null) {
ProviderList.debug.println("ThreadLocal providers: " + list);
}
ProviderList oldList = threadLists.get();
threadListsUsed++;
threadLists.set(list);
return oldList;
}
public static synchronized void endThreadProviderList(ProviderList list) {
if (list == null) {
if (ProviderList.debug != null) {
ProviderList.debug.println("Disabling ThreadLocal providers");
}
threadLists.remove();
} else {
if (ProviderList.debug != null) {
ProviderList.debug.println
("Restoring previous ThreadLocal providers: " + list);
}
threadLists.set(list);
}
threadListsUsed--;
}
}