1 files changed, 155 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/javax/crypto/sasl/srp/ClientStore.java b/gcc-4.4.3/libjava/classpath/gnu/javax/crypto/sasl/srp/ClientStore.java
new file mode 100644
index 000000000..866e610d8
--- /dev/null
+++ b/gcc-4.4.3/libjava/classpath/gnu/javax/crypto/sasl/srp/ClientStore.java
@@ -0,0 +1,155 @@
+/* ClientStore.java -- 
+   Copyright (C) 2003, 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.crypto.sasl.srp;
+
+import java.util.HashMap;
+
+/**
+ * The client-side implementation of the SRP security context store.
+ */
+public class ClientStore
+{
+  /** The underlying singleton. */
+  private static ClientStore singleton = null;
+  /** The map of uid --> SASL Security Context record. */
+  private static final HashMap uid2ssc = new HashMap();
+  /** The map of sid --> Session timing record. */
+  private static final HashMap uid2ttl = new HashMap();
+  /** A synchronisation lock. */
+  private static final Object lock = new Object();
+
+  /** Private constructor to enforce Singleton pattern. */
+  private ClientStore()
+  {
+    super();
+
+    // TODO: add a cleaning timer thread
+  }
+
+  /**
+   * Returns the classloader Singleton.
+   * 
+   * @return the classloader Singleton instance.
+   */
+  static synchronized final ClientStore instance()
+  {
+    if (singleton == null)
+      singleton = new ClientStore();
+    return singleton;
+  }
+
+  /**
+   * Returns a boolean flag indicating if the designated client's session is
+   * still alive or not.
+   * 
+   * @param uid the identifier of the client whose session to check.
+   * @return <code>true</code> if the designated client's session is still
+   *         alive. <code>false</code> otherwise.
+   */
+  boolean isAlive(final String uid)
+  {
+    final boolean result;
+    synchronized (lock)
+      {
+        final Object obj = uid2ssc.get(uid);
+        result = (obj != null);
+        if (result) // is it still alive?
+          {
+            final StoreEntry sto = (StoreEntry) uid2ttl.get(uid);
+            if (! sto.isAlive()) // invalidate it
+              {
+                uid2ssc.remove(uid);
+                uid2ttl.remove(uid);
+              }
+          }
+      }
+    return result;
+  }
+
+  /**
+   * Records a mapping between a client's unique identifier and its security
+   * context.
+   * 
+   * @param uid the unique identifier of the SRP client for which the session is
+   *          to be cached.
+   * @param ttl the session's Time-To-Live indicator (in seconds).
+   * @param ctx the client's security context.
+   */
+  void cacheSession(final String uid, final int ttl, final SecurityContext ctx)
+  {
+    synchronized (lock)
+      {
+        uid2ssc.put(uid, ctx);
+        uid2ttl.put(uid, new StoreEntry(ttl));
+      }
+  }
+
+  /**
+   * Removes the mapping between the designated SRP client unique identifier and
+   * the its session security context (and other timing information).
+   * 
+   * @param uid the identifier of the client whose session is to invalidate.
+   */
+  void invalidateSession(final String uid)
+  {
+    synchronized (lock)
+      {
+        uid2ssc.remove(uid);
+        uid2ttl.remove(uid);
+      }
+  }
+
+  /**
+   * Returns an SRP client's security context record mapped by that client's
+   * unique identifier.
+   * 
+   * @param uid the identifier of the client whose session is to restore.
+   * @return the SRP client's security context.
+   */
+  SecurityContext restoreSession(final String uid)
+  {
+    final SecurityContext result;
+    synchronized (lock)
+      {
+        result = (SecurityContext) uid2ssc.remove(uid);
+        uid2ttl.remove(uid);
+      }
+    return result;
+  }
+}