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/* Certificate.java -- deprecated interface for modeling digital certificates
   Copyright (C) 1998, 2002, 2004  Free Software Foundation, Inc.
 
This file is 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, 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; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, 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 java.security;
 
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
 
/**
 * This interface models a digital certificate which verifies the
 * authenticity of a party.  This class simply allows certificate
 * information to be queried, it does not guarantee that the certificate
 * is valid.
 *
 * <p>This class is deprecated in favor of the new java.security.cert package.
 * It exists for backward compatibility only.
 *
 * @author Aaron M. Renn (arenn@urbanophile.com)
 * @since 1.1
 * @deprecated use {@link java.security.cert} instead
 * @status updated to 1.4
 */
public interface Certificate
{
  /**
   * This method returns the <code>Principal</code> that is guaranteeing
   * this certificate.
   *
   * @return the <code>Principal</code> guaranteeing the certificate
   */
  Principal getGuarantor();
 
  /**
   * This method returns the <code>Principal</code> being guaranteed by
   * this certificate.
   *
   * @return the <code>Principal</code> guaranteed by this certificate
   */
  Principal getPrincipal();
 
  /**
   * This method returns the public key for the <code>Principal</code> that
   * is being guaranteed.
   *
   * @return the <code>PublicKey</code> of the Principal being guaranteed
   */
  PublicKey getPublicKey();
 
  /**
   * This method writes the certificate to an <code>OutputStream</code> in
   * a format that can be understood by the <code>decode</code> method.
   *
   * @param out the <code>OutputStream</code> to write to
   * @throws KeyException if there is a problem with the certificate
   * @throws IOException if an error occurs writing to the stream
   * @see #decode(InputStream)
   * @see #getFormat()
   */
  void encode(OutputStream out) throws KeyException, IOException;
 
  /**
   * This method reads an encoded certificate from an <code>InputStream</code>.
   *
   * @param in the <code>InputStream</code> to read from
   * @throws KeyException if there is a problem with the certificate data
   * @throws IOException if an error occurs reading from the stream
   * @see #encode(OutputStream)
   * @see #getFormat()
   */
  void decode(InputStream in) throws KeyException, IOException;
 
  /**
   * This method returns the encoding format of the certificate (e.g., "PGP",
   * "X.509").  This format is used by the <code>encode</code> and
   * <code>decode</code> methods.
   *
   * @return the encoding format being used
   */
  String getFormat();
 
  /**
   * This method returns a <code>String</code> representation of the contents
   * of this certificate.
   *
   * @param detail true to provided more detailed information
   * @return the string representation
   */
  String toString(boolean detail);
} // interface Certificate