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diff --git a/libjava/classpath/gnu/java/security/jce/hash/MessageDigestAdapter.java b/libjava/classpath/gnu/java/security/jce/hash/MessageDigestAdapter.java
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+/* MessageDigestAdapter.java --
+   Copyright (C) 2001, 2002, 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.java.security.jce.hash;
+
+import gnu.java.security.hash.IMessageDigest;
+import gnu.java.security.hash.HashFactory;
+
+import java.security.DigestException;
+import java.security.MessageDigestSpi;
+
+/**
+ * The implementation of a generic {@link java.security.MessageDigest} adapter
+ * class to wrap GNU hash instances.
+ * <p>
+ * This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for
+ * the {@link java.security.MessageDigest} class, which provides the
+ * functionality of a message digest algorithm, such as MD5 or SHA. Message
+ * digests are secure one-way hash functions that take arbitrary-sized data and
+ * output a fixed-length hash value.
+ * <p>
+ * All the abstract methods in the {@link MessageDigestSpi} class are
+ * implemented by this class and all its sub-classes.
+ * <p>
+ * All the implementations which subclass this object, and which are serviced by
+ * the GNU provider implement the {@link Cloneable} interface.
+ */
+class MessageDigestAdapter
+    extends MessageDigestSpi
+    implements Cloneable
+{
+  /** Our underlying hash instance. */
+  private IMessageDigest adaptee;
+
+  /**
+   * Trivial protected constructor.
+   *
+   * @param mdName the canonical name of the hash algorithm.
+   */
+  protected MessageDigestAdapter(String mdName)
+  {
+    this(HashFactory.getInstance(mdName));
+  }
+
+  /**
+   * Private constructor for cloning purposes.
+   *
+   * @param adaptee a clone of the underlying hash algorithm instance.
+   */
+  private MessageDigestAdapter(IMessageDigest adaptee)
+  {
+    super();
+
+    this.adaptee = adaptee;
+  }
+
+  public Object clone()
+  {
+    return new MessageDigestAdapter((IMessageDigest) adaptee.clone());
+  }
+
+  public int engineGetDigestLength()
+  {
+    return adaptee.hashSize();
+  }
+
+  public void engineUpdate(byte input)
+  {
+    adaptee.update(input);
+  }
+
+  public void engineUpdate(byte[] input, int offset, int len)
+  {
+    adaptee.update(input, offset, len);
+  }
+
+  public byte[] engineDigest()
+  {
+    return adaptee.digest();
+  }
+
+  public int engineDigest(byte[] buf, int offset, int len)
+      throws DigestException
+  {
+    int result = adaptee.hashSize();
+    if (len < result)
+      throw new DigestException();
+
+    byte[] md = adaptee.digest();
+    System.arraycopy(md, 0, buf, offset, result);
+    return result;
+  }
+
+  public void engineReset()
+  {
+    adaptee.reset();
+  }
+}