/* CertificateEntry.java -- 
   Copyright (C) 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
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package gnu.javax.crypto.keyring;

import java.io.DataInputStream;
import java.io.IOException;
import java.security.cert.Certificate;
import java.security.cert.CertificateEncodingException;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.util.Date;

/**
 * An immutable class representing a trusted certificate entry.
 */
public final class CertificateEntry
    extends PrimitiveEntry
{
  public static final int TYPE = 5;
  /** The certificate. */
  private Certificate certificate;

  /**
   * Creates a new certificate entry.
   * 
   * @param certificate The certificate.
   * @param creationDate The creation date.
   * @param properties The alias.
   * @throws IllegalArgumentException If any argument is null, or if the alias
   *           is empty.
   */
  public CertificateEntry(Certificate certificate, Date creationDate,
                          Properties properties)
  {
    super(TYPE, creationDate, properties);
    if (certificate == null)
      throw new IllegalArgumentException("no certificate");
    this.certificate = certificate;
    this.properties.put("type", certificate.getType());
  }

  private CertificateEntry()
  {
    super(TYPE);
  }

  public static CertificateEntry decode(DataInputStream in) throws IOException
  {
    CertificateEntry entry = new CertificateEntry();
    entry.properties.decode(in);
    entry.makeCreationDate();
    String type = entry.properties.get("type");
    if (type == null)
      throw new MalformedKeyringException("no certificate type");
    int len = in.readInt();
    MeteredInputStream in2 = new MeteredInputStream(in, len);
    try
      {
        CertificateFactory fact = CertificateFactory.getInstance(type);
        entry.certificate = fact.generateCertificate(in2);
      }
    catch (CertificateException ce)
      {
        throw new MalformedKeyringException(ce.toString());
      }
    if (! in2.limitReached())
      throw new MalformedKeyringException("extra data at end of payload");
    return entry;
  }

  /**
   * Returns this entry's certificate.
   * 
   * @return The certificate.
   */
  public Certificate getCertificate()
  {
    return certificate;
  }

  protected void encodePayload() throws IOException
  {
    try
      {
        payload = certificate.getEncoded();
      }
    catch (CertificateEncodingException cee)
      {
        throw new IOException(cee.toString());
      }
  }
}