2006-06-03 Casey Marshall <csm@gnu.org> New files for public GNU extension API.

6 files changed, 780 insertions, 0 deletions

diff --git a/gnu/javax/net/ssl/SSLCipherSuite.java b/gnu/javax/net/ssl/SSLCipherSuite.java
new file mode 100644
index 000000000..a3ab87713
--- /dev/null
+++ b/gnu/javax/net/ssl/SSLCipherSuite.java
@@ -0,0 +1,142 @@
+/* SSLCipherSuite.java -- an SSL cipher suite.
+   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.Engine;
+
+import java.lang.reflect.InvocationTargetException;
+import java.nio.ByteBuffer;
+import java.security.NoSuchAlgorithmException;
+import java.security.Provider;
+import java.security.Security;
+
+/**
+ * An SSL cipher suite.
+ */
+public abstract class SSLCipherSuite
+{
+  private static final String SERVICE = "SSLCipherSuite";
+  private final String algorithm;
+  private final byte[] id;
+  private final SSLProtocolVersion version;
+  private Provider provider;
+  
+  protected SSLCipherSuite (final String algorithm, final byte[] id,
+                            final SSLProtocolVersion version)
+  {
+    this.algorithm = algorithm;
+    if (id.length != 2)
+      throw new IllegalArgumentException ("cipher suite ID must be two bytes");
+    this.id = (byte[]) id.clone ();
+    this.version = version;
+  }
+  
+  public static final SSLCipherSuite getInstance (SSLProtocolVersion version, byte[] id)
+    throws NoSuchAlgorithmException
+  {
+    return getInstance (version + "-" + ((id[0] & 0xFF) + "/" + (id[1] & 0xFF)));
+  }
+  
+  public static final SSLCipherSuite getInstance (SSLProtocolVersion version,
+                                                  byte[] id, Provider provider)
+    throws NoSuchAlgorithmException
+  {
+    return getInstance (version + "-" + (id[0] & 0xFF) + "/" + (id[1] & 0xFF), provider);
+  }
+  
+  public static final SSLCipherSuite getInstance (String name)
+    throws NoSuchAlgorithmException
+  {
+    Provider[] providers = Security.getProviders ();
+    for (int i = 0; i < providers.length; i++)
+      {
+        try
+          {
+            return getInstance (name, providers[i]);
+          }
+        catch (NoSuchAlgorithmException nsae)
+          {
+            // Ignore.
+          }
+      }
+      
+    throw new NoSuchAlgorithmException (SERVICE + ": " + name);
+  }
+  
+  public static final SSLCipherSuite getInstance (String name, Provider provider)
+    throws NoSuchAlgorithmException
+  {
+    SSLCipherSuite suite = null;
+    try
+      {
+        suite = (SSLCipherSuite) Engine.getInstance (SERVICE, name, provider);
+        suite.provider = provider;
+      }
+    catch (InvocationTargetException ite)
+      {
+        // XXX
+        NoSuchAlgorithmException nsae = new NoSuchAlgorithmException (name);
+        nsae.initCause (ite);
+        throw nsae;
+      }
+    return suite;
+  }
+  
+  public final String getAlgorithm ()
+  {
+    return algorithm;
+  }
+  
+  public final byte[] getId ()
+  {
+    return (byte[]) id.clone ();
+  }
+  
+  public final Provider getProvider ()
+  {
+    return provider;
+  }
+  
+  public final SSLProtocolVersion getProtocolVersion ()
+  {
+    return version;
+  }
+  
+  public abstract void encipher (ByteBuffer in, ByteBuffer out);
+}
diff --git a/gnu/javax/net/ssl/SSLProtocolVersion.java b/gnu/javax/net/ssl/SSLProtocolVersion.java
new file mode 100644
index 000000000..3998f936a
--- /dev/null
+++ b/gnu/javax/net/ssl/SSLProtocolVersion.java
@@ -0,0 +1,54 @@
+/* SSLProtocolVersion.java --
+   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;
+
+public enum SSLProtocolVersion
+{
+  SSLv3 (3, 0),
+  TLSv1 (3, 1);
+
+  public final int major;
+  public final int minor;
+
+  private SSLProtocolVersion (int major, int minor)
+  {
+    this.major = major;
+    this.minor = minor;
+  }
+}
diff --git a/gnu/javax/net/ssl/SSLRecordHandler.java b/gnu/javax/net/ssl/SSLRecordHandler.java
new file mode 100644
index 000000000..3147415fe
--- /dev/null
+++ b/gnu/javax/net/ssl/SSLRecordHandler.java
@@ -0,0 +1,101 @@
+/* SSLRecordHandler.java -- a class that handles SSL record layer messages.
+   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 java.nio.ByteBuffer;
+import javax.net.ssl.SSLEngineResult;
+import javax.net.ssl.SSLException;
+
+public abstract class SSLRecordHandler
+{
+  private final byte contentType;
+
+  /**
+   * Create a new record handler for the given content type.
+   */
+  protected SSLRecordHandler (final byte contentType)
+  {
+    this.contentType = contentType;
+  }
+
+  /**
+   * Handle an SSL record layer message, encapsulated in the supplied
+   * input buffer, and writing any output bytes to the output
+   * buffer. The input buffer is always only limited to the bytes that
+   * encapsulate the <em>fragment</em> of the record layer message
+   * &mdash; that is, the content-type, version, and length fields are
+   * not present in the input buffer, and the limit of the input
+   * buffer is always only as large as the fragment. If the message
+   * being read is not contained entirely within the given buffer,
+   * then the implementation should cache the bytes read as input, and
+   * wait until subsequent calls finish the object being read.
+   *
+   * <p>Technically, we expect only APPLICATION messages to ever
+   * produce output, but do suppose that extensions to the SSL
+   * protocol could allow other channels that produce output.
+   *
+   * @param input The input buffer.
+   * @param output The output buffer.
+   */
+  public abstract void handle (final ByteBuffer input,
+                               final ByteBuffer output)
+    throws SSLException;
+
+  /**
+   * Returns the record layer content type that this handler is for.
+   *
+   * @return The content type value.
+   */
+  public final byte contentType ()
+  {
+    return contentType;
+  }
+
+  public boolean equals (final Object o)
+  {
+    if (!(o instanceof SSLRecordHandler))
+      return false;
+    return ((SSLRecordHandler) o).contentType == contentType;
+  }
+
+  public int hashCode ()
+  {
+    return contentType & 0xFF;
+  }
+}
\ No newline at end of file
diff --git a/gnu/javax/net/ssl/Session.java b/gnu/javax/net/ssl/Session.java
new file mode 100644
index 000000000..75633def2
--- /dev/null
+++ b/gnu/javax/net/ssl/Session.java
@@ -0,0 +1,276 @@
+/* SessionImpl.java -- concrete definition of SSLSession.
+   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 java.io.Serializable;
+
+import java.security.Principal;
+import java.security.SecureRandom;
+import java.security.cert.Certificate;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Iterator;
+
+import javax.net.ssl.SSLPeerUnverifiedException;
+import javax.net.ssl.SSLSession;
+import javax.security.cert.X509Certificate;
+
+/**
+ * A concrete implementation of the {@link SSLSession} interface. This
+ * class is provided to allow pluggable {@link SessionStore}
+ * implementations.
+ */
+public abstract class Session implements SSLSession, Serializable
+{
+  protected final long creationTime;
+  protected long lastAccessedTime;
+  protected int applicationBufferSize;
+  protected ID sessionId;
+  protected Certificate[] localCerts;
+  protected Certificate[] peerCerts;
+  protected X509Certificate[] peerCertChain;
+  protected String peerHost;
+  protected int peerPort;
+  protected boolean peerVerified;
+  protected HashMap values;
+  protected boolean valid;
+  protected SecureRandom random;
+
+  protected Session ()
+  {
+    creationTime = System.currentTimeMillis ();
+    values = new HashMap ();
+  }
+
+  public void access ()
+  {
+    lastAccessedTime = System.currentTimeMillis ();
+  }
+
+  public int getApplicationBufferSize ()
+  {
+    return applicationBufferSize;
+  }
+
+  public String getCipherSuite ()
+  {
+    return null;
+  }
+
+  public long getCreationTime ()
+  {
+    return creationTime;
+  }
+
+  public byte[] getId ()
+  {
+    return sessionId.id ();
+  }
+
+  public ID id ()
+  {
+    return sessionId;
+  }
+
+  public long getLastAccessedTime ()
+  {
+    return lastAccessedTime;
+  }
+
+  public Certificate[] getLocalCertificates ()
+  {
+    if (localCerts == null)
+      return null;
+    return (Certificate[]) localCerts.clone ();
+  }
+
+  public Certificate[] getPeerCertificates () throws SSLPeerUnverifiedException
+  {
+    if (!peerVerified)
+      throw new SSLPeerUnverifiedException ("peer not verified");
+    if (peerCerts == null)
+      return null;
+    return (Certificate[]) peerCerts.clone ();
+  }
+
+  public X509Certificate[] getPeerCertificateChain () throws SSLPeerUnverifiedException
+  {
+    if (!peerVerified)
+      throw new SSLPeerUnverifiedException ("peer not verified");
+    if (peerCertChain == null)
+      return null;
+    return (X509Certificate[]) peerCertChain.clone ();
+  }
+  
+  public String getPeerHost ()
+  {
+    return peerHost;
+  }
+  
+  public int getPeerPort ()
+  {
+    return peerPort;
+  }
+
+  public Principal getPeerPrincipal () throws SSLPeerUnverifiedException
+  {
+    return null;
+  }
+  
+  public String[] getValueNames ()
+  {
+    HashMap values = this.values;
+    String[] s = new String[values.size ()];
+    int i = 0;
+    for (Iterator it = values.keySet ().iterator (); it.hasNext () && i < s.length; )
+      s[i++] = (String) it.next ();
+    return s;
+  }
+  
+  public Object getValue (String name)
+  {
+    return values.get (name);
+  }
+  
+  public void invalidate ()
+  {
+    valid = false;
+  }
+  
+  public boolean isValid ()
+  {
+    return valid;
+  }
+  
+  public void putValue (String name, Object value)
+  {
+    values.put (name, value);
+  }
+  
+  public void removeValue (String name)
+  {
+    values.remove (name);
+  }
+
+  public abstract void prepare (char[] password);
+
+  // Inner classes.
+  // -------------------------------------------------------------------------
+
+  /**
+   * An SSL or TLS session ID.
+   */
+  public static final class ID implements Comparable, Serializable
+  {
+
+    // Fields.
+    // -----------------------------------------------------------------------
+
+    /** The ID itself. */
+    private final byte[] id;
+
+    // Constructor.
+    // -----------------------------------------------------------------------
+
+    /**
+     * Creates a new ID.
+     *
+     * @param id The ID. The array is cloned.
+     */
+    public ID (final byte[] id)
+    {
+      if (id.length > 32)
+        throw new IllegalArgumentException ("session ID's are limited to 32 bytes");
+      this.id = (byte[]) id.clone();
+    }
+
+    // Instance methods.
+    // -----------------------------------------------------------------------
+
+    public byte[] id()
+    {
+      return (byte[]) id.clone();
+    }
+
+    public boolean equals(Object other)
+    {
+      if (!(other instanceof ID))
+        return false;
+      return Arrays.equals(id, ((ID) other).id);
+    }
+
+    public int hashCode()
+    {
+      int code = 0;
+      for (int i = 0; i < id.length; i++)
+        code |= (id[i] & 0xFF) << ((i & 3) << 3);
+      return code;
+    }
+
+    public int compareTo(Object other)
+    {
+      byte[] id2 = ((ID) other).id;
+      if (id.length != id2.length)
+        return (id.length < id2.length) ? -1 : 1;
+      for (int i = 0; i < id.length; i++)
+        {
+          if ((id[i] & 0xFF) < (id2[i] & 0xFF))
+            return -1;
+          if ((id[i] & 0xFF) > (id2[i] & 0xFF))
+            return 1;
+        }
+      return 0;
+    }
+
+    public String toString()
+    {
+      StringBuffer str = new StringBuffer (3 * id.length + 1);
+      for (int i = 0; i < id.length; i++)
+        {
+          int x = id[i] & 0xFF;
+          str.append (Character.forDigit ((x >>> 4) & 0xF, 16));
+          str.append (Character.forDigit (x & 0xF, 16));
+          if (i != id.length - 1)
+            str.append (':');
+        }
+      return str.toString ();
+    }
+  }
+}
\ No newline at end of file
diff --git a/gnu/javax/net/ssl/SessionStore.java b/gnu/javax/net/ssl/SessionStore.java
new file mode 100644
index 000000000..5b42a702a
--- /dev/null
+++ b/gnu/javax/net/ssl/SessionStore.java
@@ -0,0 +1,148 @@
+/* SessionStore.java -- 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 javax.net.ssl.SSLPermission;
+
+public abstract class SessionStore
+{
+
+  protected final long timeout;
+  private static SessionStore globalInstance; // = XXX default impl.
+
+  public static SessionStore globalInstance ()
+  {
+    SecurityManager sm = System.getSecurityManager ();
+    if (sm != null)
+      sm.checkPermission (new SSLPermission ("gnu.javax.net.ssl.SessionStore",
+                                             "getGlobalInstance"));
+    return globalInstance;
+  }
+
+  public static void setGlobalInstance (SessionStore store)
+  {
+    SecurityManager sm = System.getSecurityManager ();
+    if (sm != null)
+      sm.checkPermission (new SSLPermission ("gnu.javax.net.ssl.SessionStore",
+                                             "setGlobalInstance"));
+    globalInstance = store;
+  }
+
+  protected SessionStore (final long timeout)
+  {
+    this.timeout = 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 Session get (Session.ID sessionId)
+  {
+    Session s = implGet (sessionId);
+    if (System.currentTimeMillis () - s.getLastAccessedTime () > timeout)
+      {
+        remove (sessionId);
+        return null;
+      }
+    return s;
+  }
+  
+  protected abstract Session implGet (Session.ID sessionId);
+
+  /**
+   * 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 (Session.ID sessionId);
+
+  /**
+   * 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
diff --git a/gnu/javax/net/ssl/SessionStoreException.java b/gnu/javax/net/ssl/SessionStoreException.java
new file mode 100644
index 000000000..5dcf3d028
--- /dev/null
+++ b/gnu/javax/net/ssl/SessionStoreException.java
@@ -0,0 +1,59 @@
+/* SessionStoreException.java --
+   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 javax.net.ssl.SSLException;
+
+public class SessionStoreException extends SSLException
+{
+  public SessionStoreException (final String message)
+  {
+    super (message);
+  }
+  
+  public SessionStoreException (final String message, final Throwable cause)
+  {
+    super (message, cause);
+  }
+  
+  public SessionStoreException (final Throwable cause)
+  {
+    super (cause);
+  }
+}