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diff --git a/libjava/classpath/gnu/java/security/jce/prng/SecureRandomAdapter.java b/libjava/classpath/gnu/java/security/jce/prng/SecureRandomAdapter.java
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+/* SecureRandomAdapter.java -- 
+   Copyright (C) 2001, 2002, 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.java.security.jce.prng;
+
+import gnu.java.security.prng.LimitReachedException;
+import gnu.java.security.prng.MDGenerator;
+
+import java.security.SecureRandomSpi;
+import java.util.HashMap;
+
+/**
+ * <p>The implementation of a generic {@link java.security.SecureRandom} adapter
+ * class to wrap gnu.crypto prng instances based on Message Digest algorithms.</p>
+ *
+ * <p>This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for
+ * the {@link java.security.SecureRandom} class, which provides the
+ * functionality of a cryptographically strong pseudo-random number generator.</p>
+ *
+ * <p>All the abstract methods in the {@link SecureRandomSpi} class are
+ * implemented by this class and all its sub-classes.</p>
+ */
+abstract class SecureRandomAdapter extends SecureRandomSpi
+{
+
+  // Constants and variables
+  // -------------------------------------------------------------------------
+
+  /** Our underlying prng instance. */
+  private MDGenerator adaptee = new MDGenerator();
+
+  /** The name of the message digest algorithm used by the adaptee. */
+  private String mdName;
+
+  // Constructor(s)
+  // -------------------------------------------------------------------------
+
+  /**
+   * <p>Trivial protected constructor.</p>
+   *
+   * @param mdName the canonical name of the underlying hash algorithm.
+   */
+  protected SecureRandomAdapter(String mdName)
+  {
+    super();
+
+    this.mdName = mdName;
+  }
+
+  // Class methods
+  // -------------------------------------------------------------------------
+
+  // Instance methods
+  // -------------------------------------------------------------------------
+
+  // java.security.SecureRandomSpi interface implementation ------------------
+
+  public byte[] engineGenerateSeed(int numBytes)
+  {
+    if (numBytes < 1)
+      {
+        return new byte[0];
+      }
+    byte[] result = new byte[numBytes];
+    this.engineNextBytes(result);
+    return result;
+  }
+
+  public void engineNextBytes(byte[] bytes)
+  {
+    if (!adaptee.isInitialised())
+      {
+        this.engineSetSeed(new byte[0]);
+      }
+    try
+      {
+        adaptee.nextBytes(bytes, 0, bytes.length);
+      }
+    catch (LimitReachedException ignored)
+      {
+      }
+  }
+
+  public void engineSetSeed(byte[] seed)
+  {
+    HashMap attributes = new HashMap();
+    attributes.put(MDGenerator.MD_NAME, mdName);
+    attributes.put(MDGenerator.SEEED, seed);
+    adaptee.init(attributes);
+  }
+}