package gnu.crypto.keyring;  // -*- c-basic-offset: 3 -*-

// ---------------------------------------------------------------------------
// $Id: IPublicKeyring.java,v 1.3 2005/10/06 04:24:16 rsdio Exp $
//
// Copyright (C) 2003 Free Software Foundation, Inc.
//
// This file is part of GNU Crypto.
//
// GNU Crypto 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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// any later version.
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// General Public License for more details.
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//
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// Linking this library statically or dynamically with other modules is
// making a combined work based on this library.  Thus, the terms and
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// ---------------------------------------------------------------------------

import java.security.cert.Certificate;

/**
 * <p>An interface for keyrings that contain trusted (by the owner) public
 * credentials (incl. certificates).</p>
 *
 * @see IKeyring
 * @version $Revision: 1.3 $
 */
public interface IPublicKeyring extends IKeyring {

   /**
    * <p>Tests if this keyring contains a certificate entry with the specified
    * <code>alias</code>.</p>
    *
    * @param alias The alias of the certificate to check.
    * @return <code>true</code> if this keyring contains a certificate entry
    * that has the given <code>alias</code>; <code>false</code> otherwise.
    */
   boolean containsCertificate(String alias);

   /**
    * <p>Returns a certificate that has the given <code>alias</code>, or
    * <code>null</code> if this keyring has no such entry.</p>
    *
    * @param alias The alias of the certificate to find.
    * @return The certificate with the designated <code>alias</code>, or
    * <code>null</code> if none found.
    */
   Certificate getCertificate(String alias);

   /**
    * <p>Adds a certificate in this keyring, with the given <code>alias</code>.</p>
    *
    * <p>What happens if there is already a certificate entry with this alias?</p>
    *
    * @param alias The alias of this certificate entry.
    * @param cert The certificate.
    */
   void putCertificate(String alias, Certificate cert);
}