/* X509ExtendedKeyManager.java -- 
   Copyright (C) 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
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General Public License for more details.

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Linking this library statically or dynamically with other modules is
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permission to link this library with independent modules to produce an
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package javax.net.ssl;

import java.security.Principal;

/**
 * An extended {@link X509KeyManager} for use with {@link SSLEngine}.
 *
 * @since 1.5
 * @author Casey Marshall (csm@gnu.org)
 */
public abstract class X509ExtendedKeyManager implements X509KeyManager
{

  /**
   * Default constructor.
   */
  protected X509ExtendedKeyManager ()
  {
  }

  /**
   * Return a client alias given a list of key types, a list of
   * allowable issuers, and the SSLEngine being used.
   *
   * <p>This implementation always returns <code>null</code>.
   *
   * @param keyTypes The list of desired key types.
   * @param issuers The list of desired key issuers.
   * @param engine This client's SSLEngine.
   * @return A key alias that matches the given parameters, or
   * <code>null</code> if the parameters were not matched.
   */
  public String chooseEngineClientAlias (final String[] keyTypes,
                                         final Principal[] issuers,
                                         final SSLEngine engine)
  {
    return null;
  }

  /**
   * Return a server alias given a key type, a list of allowable
   * issuers, and the SSLEngine being used.
   *
   * <p>This implementation always returns <code>null</code>.
   *
   * @param keyType The desired key type.
   * @param issuers The list of desired key issuers.
   * @param engine The server's SSLEngine.
   * @return A key alias that matches the given parameters, or
   * <code>null</code> if the parameters were not matched.
   */
  public String chooseEngineServerAlias (final String keyType,
                                         final Principal[] issuers,
                                         final SSLEngine engine)
  {
    return null;
  }
}