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diff --git a/libjava/classpath/gnu/java/security/jce/sig/SignatureAdapter.java b/libjava/classpath/gnu/java/security/jce/sig/SignatureAdapter.java
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+/* SignatureAdapter.java -- 
+   Copyright 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.sig;
+
+import gnu.java.security.sig.BaseSignature;
+import gnu.java.security.sig.ISignature;
+import gnu.java.security.sig.ISignatureCodec;
+import gnu.java.security.sig.SignatureFactory;
+
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidKeyException;
+import java.security.InvalidParameterException;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+import java.security.SecureRandom;
+import java.security.SignatureException;
+import java.security.SignatureSpi;
+import java.security.spec.AlgorithmParameterSpec;
+import java.util.HashMap;
+import java.util.logging.Logger;
+
+/**
+ * The implementation of a generic {@link java.security.Signature} adapter class
+ * to wrap gnu.crypto signature instances.<p>
+ *
+ * This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for the
+ * {@link java.security.Signature} class, which provides the functionality of a
+ * digital signature algorithm. Digital signatures are used for authentication
+ * and integrity assurance of digital data.<p>
+ *
+ * All the abstract methods in the {@link java.security.SignatureSpi} 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 Crypto provider implement the {@link java.lang.Cloneable} interface.<p>
+ *
+ * @version $Revision: 1.2 $
+ */
+class SignatureAdapter extends SignatureSpi implements Cloneable
+{
+  private static final Logger log = Logger.getLogger(SignatureAdapter.class.getName());
+
+  // Constants and variables
+  // -------------------------------------------------------------------------
+
+  /** Our underlying signature instance. */
+  private ISignature adaptee;
+
+  /** Our underlying signature encoder/decoder engine. */
+  private ISignatureCodec codec;
+
+  // Constructor(s)
+  // -------------------------------------------------------------------------
+
+  /**
+   * Trivial protected constructor.<p>
+   *
+   * @param sigName the canonical name of the signature scheme.
+   * @param codec the signature codec engine to use with this scheme.
+   */
+  protected SignatureAdapter(String sigName, ISignatureCodec codec)
+  {
+    this(SignatureFactory.getInstance(sigName), codec);
+  }
+
+  /**
+   * Private constructor for cloning purposes.<p>
+   *
+   * @param adaptee a clone of the underlying signature scheme instance.
+   * @param codec the signature codec engine to use with this scheme.
+   */
+  private SignatureAdapter(ISignature adaptee, ISignatureCodec codec)
+  {
+    super();
+
+    this.adaptee = adaptee;
+    this.codec = codec;
+  }
+
+  // Class methods
+  // -------------------------------------------------------------------------
+
+  // java.security.SignatureSpi interface implementation
+  // -------------------------------------------------------------------------
+
+  public Object clone()
+  {
+    return new SignatureAdapter((ISignature) adaptee.clone(), codec);
+  }
+
+  public void engineInitVerify(PublicKey publicKey) throws InvalidKeyException
+  {
+    HashMap attributes = new HashMap();
+    attributes.put(BaseSignature.VERIFIER_KEY, publicKey);
+    try
+      {
+        adaptee.setupVerify(attributes);
+      }
+    catch (IllegalArgumentException x)
+      {
+        throw new InvalidKeyException(String.valueOf(x));
+      }
+  }
+
+  public void engineInitSign(PrivateKey privateKey) throws InvalidKeyException
+  {
+    HashMap attributes = new HashMap();
+    attributes.put(BaseSignature.SIGNER_KEY, privateKey);
+    try
+      {
+        adaptee.setupSign(attributes);
+      }
+    catch (IllegalArgumentException x)
+      {
+        throw new InvalidKeyException(String.valueOf(x));
+      }
+  }
+
+  public void engineInitSign(PrivateKey privateKey, SecureRandom random)
+      throws InvalidKeyException
+  {
+    HashMap attributes = new HashMap();
+    attributes.put(BaseSignature.SIGNER_KEY, privateKey);
+    attributes.put(BaseSignature.SOURCE_OF_RANDOMNESS, random);
+    try
+      {
+        adaptee.setupSign(attributes);
+      }
+    catch (IllegalArgumentException x)
+      {
+        throw new InvalidKeyException(String.valueOf(x));
+      }
+  }
+
+  public void engineUpdate(byte b) throws SignatureException
+  {
+    try
+      {
+        adaptee.update(b);
+      }
+    catch (IllegalStateException x)
+      {
+        throw new SignatureException(String.valueOf(x));
+      }
+  }
+
+  public void engineUpdate(byte[] b, int off, int len)
+      throws SignatureException
+  {
+    try
+      {
+        adaptee.update(b, off, len);
+      }
+    catch (IllegalStateException x)
+      {
+        throw new SignatureException(String.valueOf(x));
+      }
+  }
+
+  public byte[] engineSign() throws SignatureException
+  {
+    Object signature = null;
+    try
+      {
+        signature = adaptee.sign();
+      }
+    catch (IllegalStateException x)
+      {
+        throw new SignatureException(String.valueOf(x));
+      }
+
+    byte[] result = codec.encodeSignature(signature);
+    return result;
+  }
+
+  public int engineSign(byte[] outbuf, int offset, int len)
+      throws SignatureException
+  {
+    byte[] signature = this.engineSign();
+    int result = signature.length;
+    if (result > len)
+      {
+        throw new SignatureException("len");
+      }
+
+    System.arraycopy(signature, 0, outbuf, offset, result);
+    return result;
+  }
+
+  public boolean engineVerify(byte[] sigBytes) throws SignatureException
+  {
+    log.entering("SignatureAdapter", "engineVerify");
+
+    Object signature = codec.decodeSignature(sigBytes);
+    boolean result = false;
+    try
+      {
+        result = adaptee.verify(signature);
+      }
+    catch (IllegalStateException x)
+      {
+        throw new SignatureException(String.valueOf(x));
+      }
+
+    log.exiting("SignatureAdapter", "engineVerify", new Boolean(result));
+    return result;
+  }
+
+  // Deprecated. Replaced by engineSetParameter.
+  public void engineSetParameter(String param, Object value)
+      throws InvalidParameterException
+  {
+    throw new InvalidParameterException("deprecated");
+  }
+
+  public void engineSetParameter(AlgorithmParameterSpec params)
+      throws InvalidAlgorithmParameterException
+  {
+  }
+
+  // Deprecated
+  public Object engineGetParameter(String param)
+      throws InvalidParameterException
+  {
+    throw new InvalidParameterException("deprecated");
+  }
+}