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jeremybenn |
/* CertificateBuilder.java --
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is a part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at
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your option) any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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USA
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.javax.net.ssl.provider;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.util.List;
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import java.security.cert.CertificateException;
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/**
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* Builder for {@link Certificate} objects.
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*
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* @author Casey Marshall (csm@gnu.org)
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*/
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public class CertificateBuilder extends Certificate implements Builder
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{
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public CertificateBuilder(final CertificateType certType)
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{
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super(ByteBuffer.allocate(1024), certType);
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}
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/* (non-Javadoc)
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* @see gnu.javax.net.ssl.provider.Builder#buffer()
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*/
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public ByteBuffer buffer()
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{
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return ((ByteBuffer) buffer.duplicate().position(0).limit(length())).slice();
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}
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public void setCertificates (final List<? extends java.security.cert.Certificate> certificates)
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throws CertificateException
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{
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ByteArrayOutputStream out = new ByteArrayOutputStream(1024);
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for (java.security.cert.Certificate cert : certificates)
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{
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byte[] encoded = cert.getEncoded();
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out.write((encoded.length >>> 16) & 0xFF);
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out.write((encoded.length >>> 8) & 0xFF);
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out.write( encoded.length & 0xFF);
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try
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{
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out.write(encoded);
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}
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catch (IOException shouldNotHappen)
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{
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// ignore; this is a ByteArrayOutputStream.
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}
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}
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byte[] certs = out.toByteArray();
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// There is only one field in Certificate; so it is easy to reallocate.
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if (buffer.capacity() < certs.length + 3)
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buffer = ByteBuffer.allocate(certs.length + 3);
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buffer.put(0, (byte) (certs.length >>> 16));
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buffer.putShort(1, (short) certs.length);
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((ByteBuffer) buffer.duplicate().position(3)).put(certs);
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}
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}
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