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'structure-aliasing-branch'.

git-svn-id: https://gcc.gnu.org/svn/gcc/branches/structure-aliasing-branch@88235 138bc75d-0d04-0410-961f-82ee72b054a4

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diff --git a/libjava/javax/crypto/NullCipher.java b/libjava/javax/crypto/NullCipher.java
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+/* NullCipher.java -- The identity cipher.
+   Copyright (C) 2004  Free Software Foundation, Inc.
+
+This file is 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, 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; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 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 javax.crypto;
+
+/**
+ * Trivial subclass of Cipher that implements the <i>identity
+ * transformation</i>, where the input is always copied to the output
+ * unchanged. Null ciphers can be instantiated with the public
+ * constructor.
+ *
+ * @author Casey Marshall (csm@gnu.org)
+ */
+public class NullCipher extends Cipher
+{
+
+  // Constructor.
+  // ------------------------------------------------------------------------
+
+  /**
+   * Create a new identity cipher.
+   */
+  public NullCipher()
+  {
+    super(new NullCipherImpl(), null, "NULL");
+  }
+}