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authorJing Yu <jingyu@google.com>2010-07-22 14:03:48 -0700
committerJing Yu <jingyu@google.com>2010-07-22 14:03:48 -0700
commitb094d6c4bf572654a031ecc4afe675154c886dc5 (patch)
tree89394c56b05e13a5413ee60237d65b0214fd98e2 /gcc-4.4.3/libjava/classpath/gnu/javax/net/ssl/AbstractSessionContext.java
parentdc34721ac3bf7e3c406fba8cfe9d139393345ec5 (diff)
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commit gcc-4.4.3 which is used to build gcc-4.4.3 Android toolchain in master.
The source is based on fsf gcc-4.4.3 and contains local patches which are recorded in gcc-4.4.3/README.google. Change-Id: Id8c6d6927df274ae9749196a1cc24dbd9abc9887
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diff --git a/gcc-4.4.3/libjava/classpath/gnu/javax/net/ssl/AbstractSessionContext.java b/gcc-4.4.3/libjava/classpath/gnu/javax/net/ssl/AbstractSessionContext.java
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+/* AbstractSessionContext -- stores SSL sessions, possibly persistently.
+ Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is a part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or (at
+your option) any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
+USA
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.javax.net.ssl;
+
+import gnu.java.security.Requires;
+
+import gnu.javax.net.ssl.provider.SimpleSessionContext;
+
+import java.util.Enumeration;
+
+import javax.net.ssl.SSLException;
+import javax.net.ssl.SSLPermission;
+import javax.net.ssl.SSLSession;
+import javax.net.ssl.SSLSessionContext;
+
+/**
+ * A skeletal implementation of {@link SSLSessionContext}. This class may
+ * be subclassed to add extended functionality to session contexts, such
+ * as by storing sessions in files on disk, or by sharing contexts
+ * across different JVM instances.
+ *
+ * <p>In order to securely store sessions, along with private key data,
+ * the abstract methods {@lnk {@link #load(char[])} and {@link #store(char[])}
+ * come into play. When storing sessions, a session context implementation
+ * must pass this password to the {@link Session#prepare(char[])} method,
+ * before either writing the {@link java.io.Serializable} session to the
+ * underlying store, or getting the opaque {@link Session#privateData()}
+ * class from the session, and storing that.
+ *
+ * <p>As a simple example, that writes sessions to some object output
+ * stream:
+ *
+ * <pre>
+ char[] password = ...;
+ ObjectOutputStream out = ...;
+ ...
+ for (Session s : this)
+ {
+ s.prepare(password);
+ out.writeObject(s);
+ }</pre>
+ *
+ * <p>The reverse must be done when deserializing sessions, by using the
+ * {@link Session#repair(char[])} method, possibly by first calling
+ * {@link Session#setPrivateData(java.io.Serializable)} with the read,
+ * opaque private data type. Thus an example of reading may be:
+ *
+ * <pre>
+ char[] password = ...;
+ ObjectInputStream in = ...;
+ ...
+ while (hasMoreSessions(in))
+ {
+ Session s = (Session) in.readObject();
+ s.repair(password);
+ addToThisStore(s);
+ }</pre>
+ *
+ * @author Casey Marshall (csm@gnu.org)
+ */
+public abstract class AbstractSessionContext implements SSLSessionContext
+{
+ protected long timeout;
+ private static Class<? extends AbstractSessionContext>
+ implClass = SimpleSessionContext.class;
+
+ /**
+ * Create a new instance of a session context, according to the configured
+ * implementation class.
+ *
+ * @return The new session context.
+ * @throws SSLException If an error occurs in creating the instance.
+ */
+ public static AbstractSessionContext newInstance () throws SSLException
+ {
+ try
+ {
+ return implClass.newInstance();
+ }
+ catch (IllegalAccessException iae)
+ {
+ throw new SSLException(iae);
+ }
+ catch (InstantiationException ie)
+ {
+ throw new SSLException(ie);
+ }
+ }
+
+ /**
+ * Reconfigure this instance to use a different session context
+ * implementation.
+ *
+ * <p><strong>Note:</strong> this method requires that the caller have
+ * {@link SSLPermission} with target
+ * <code>gnu.javax.net.ssl.AbstractSessionContext</code> and action
+ * <code>setImplClass</code>.
+ *
+ * @param clazz The new implementation class.
+ * @throws SecurityException If the caller does not have permission to
+ * change the session context.
+ */
+ @Requires(permissionClass = SSLPermission.class,
+ target = "gnu.javax.net.ssl.AbstractSessionContext",
+ action = "setImplClass")
+ public static synchronized void setImplClass
+ (Class<? extends AbstractSessionContext> clazz)
+ throws SecurityException
+ {
+ SecurityManager sm = System.getSecurityManager ();
+ if (sm != null)
+ sm.checkPermission(new SSLPermission("gnu.javax.net.ssl.AbstractSessionContext",
+ "setImplClass"));
+ implClass = clazz;
+ }
+
+ /**
+ * @param timeout The initial session timeout.
+ */
+ protected AbstractSessionContext (final int timeout)
+ {
+ setSessionTimeout(timeout);
+ }
+
+ /**
+ * Fetch a saved session by its ID. This method will (possibly)
+ * deserialize and return the SSL session with that ID, or null if
+ * the requested session does not exist, or has expired.
+ *
+ * <p>Subclasses implementing this class <strong>must not</strong>
+ * perform any blocking operations in this method. If any blocking
+ * behavior is required, it must be done in the {@link load(char[])}
+ * method.
+ *
+ * @param sessionId The ID of the session to get.
+ * @return The found session, or null if no such session was found,
+ * or if that session has expired.
+ */
+ public final SSLSession getSession (byte[] sessionId)
+ {
+ Session s = implGet (sessionId);
+ if (s != null
+ && System.currentTimeMillis () - s.getLastAccessedTime () > timeout)
+ {
+ remove (sessionId);
+ return null;
+ }
+ return s;
+ }
+
+ public final SSLSession getSession(String host, int port)
+ {
+ for (Enumeration e = getIds(); e.hasMoreElements(); )
+ {
+ byte[] id = (byte[]) e.nextElement();
+ SSLSession s = getSession(id);
+ if (s == null) // session expired.
+ continue;
+ String host2 = s.getPeerHost();
+ if (host == null)
+ {
+ if (host2 != null)
+ continue;
+ }
+ else if (!host.equals(host2))
+ continue;
+ int port2 = s.getPeerPort();
+ if (port != port2)
+ continue;
+
+ // Else, a match.
+ return s;
+ }
+
+ return null;
+ }
+
+ /**
+ * To be implemented by subclasses. Subclasses do not need to check
+ * timeouts in this method.
+ *
+ * @param sessionId The session ID.
+ * @return The session, or <code>null</code> if the requested session
+ * was not found.
+ */
+ protected abstract Session implGet (byte[] sessionId);
+
+ public int getSessionTimeout()
+ {
+ return (int) (timeout / 1000);
+ }
+
+ /**
+ * Load this session store from the underlying media, if supported
+ * by the implementation.
+ *
+ * @param password The password that protects the sensitive data in
+ * this store.
+ * @throws SessionStoreException If reading this store fails, such
+ * as when an I/O exception occurs, or if the password is incorrect.
+ */
+ public abstract void load (char[] password) throws SessionStoreException;
+
+ /**
+ * Add a new session to the store. The underlying implementation
+ * will add the session to its store, possibly overwriting any
+ * existing session with the same ID.
+ *
+ * <p>Subclasses implementing this class <strong>must not</strong>
+ * perform any blocking operations in this method. If any blocking
+ * behavior is required, it must be done in the {@link
+ * #store(char[])} method.
+ *
+ * @param session The session to add.
+ * @throws NullPointerException If the argument is null.
+ */
+ public abstract void put (Session session);
+
+ /**
+ * Remove a session from this store.
+ *
+ * <p>Subclasses implementing this class <strong>must not</strong>
+ * perform any blocking operations in this method. If any blocking
+ * behavior is required, it must be done in the {@link
+ * #store(char[])} method.
+ *
+ * @param sessionId The ID of the session to remove.
+ */
+ public abstract void remove (byte[] sessionId);
+
+ /**
+ *
+ */
+ public final void setSessionTimeout(int seconds)
+ {
+ if (timeout < 0)
+ throw new IllegalArgumentException("timeout may not be negative");
+ this.timeout = (long) seconds * 1000;
+ }
+
+ /**
+ * Commit this session store to the underlying media. For session
+ * store implementations that support saving sessions across
+ * invocations of the JVM, this method will save any sessions that
+ * have not expired to some persistent media, so they may be loaded
+ * and used again later.
+ *
+ * @param password The password that will protect the sensitive data
+ * in this store.
+ */
+ public abstract void store (char[] password) throws SessionStoreException;
+} \ No newline at end of file