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jeremybenn |
/* ServerKeyExchangeBuilder.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.nio.ByteBuffer;
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/**
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* Builder for {@link ServerKeyExchange} 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 ServerKeyExchangeBuilder extends ServerKeyExchange
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implements Builder
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{
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public ServerKeyExchangeBuilder(final CipherSuite suite)
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{
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super(ByteBuffer.allocate(1024), suite);
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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 setParams(ByteBuffer params)
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{
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if (suite.keyExchangeAlgorithm() == KeyExchangeAlgorithm.NONE)
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throw new IllegalArgumentException("key exchange algorithm is none");
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ensureCapacity(params.remaining());
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buffer.duplicate().put(params);
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}
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public void setSignature(ByteBuffer signature)
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{
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if (suite.keyExchangeAlgorithm() == KeyExchangeAlgorithm.NONE)
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throw new IllegalArgumentException("key exchange algorithm is none");
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int paramsLen = params().length();
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ensureCapacity(paramsLen + signature.remaining());
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((ByteBuffer) buffer.duplicate().position(paramsLen)).put(signature);
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}
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public void ensureCapacity(int capacity)
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{
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if (buffer.capacity() >= capacity)
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return;
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ByteBuffer newBuffer = ByteBuffer.allocate(capacity);
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newBuffer.duplicate().put(buffer);
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buffer = newBuffer;
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}
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}
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