| /* ClientHelloBuilder.java -- |
| Copyright (C) 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 |
| 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 gnu.javax.net.ssl.provider; |
| |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| |
| /** |
| * Builder for {@link ClientHello} objects. |
| * |
| * @author Casey Marshall (csm@gnu.org) |
| */ |
| public class ClientHelloBuilder extends ClientHello implements Builder |
| { |
| public ClientHelloBuilder() |
| { |
| super(ByteBuffer.allocate(256)); |
| } |
| |
| /* (non-Javadoc) |
| * @see gnu.javax.net.ssl.provider.Builder#buffer() |
| */ |
| public ByteBuffer buffer() |
| { |
| return (ByteBuffer) buffer.duplicate().position(0).limit(length()); |
| } |
| |
| public void setVersion(final ProtocolVersion version) |
| { |
| ensureCapacity(2); |
| buffer.putShort(0, (short) version.rawValue ()); |
| } |
| |
| public void setSessionId (final byte[] buffer) |
| { |
| setSessionId(buffer, 0, buffer.length); |
| } |
| |
| public void setSessionId (final byte[] buffer, final int offset, final int length) |
| { |
| ensureCapacity(SESSID_OFFSET2 + length); |
| int len = Math.min (32, length); |
| this.buffer.put (SESSID_OFFSET, (byte) len); |
| this.buffer.position (SESSID_OFFSET2); |
| this.buffer.put (buffer, offset, len); |
| } |
| |
| public void setCipherSuites(List<CipherSuite> suites) |
| { |
| int off = getCipherSuitesOffset(); |
| ensureCapacity(off + (2 * suites.size()) + 2); |
| buffer.putShort(off, (short) (suites.size() * 2)); |
| int i = 2; |
| for (CipherSuite suite : suites) |
| { |
| ((ByteBuffer) buffer.duplicate().position(off+i)).put(suite.id()); |
| i += 2; |
| } |
| } |
| |
| public void setCompressionMethods(List<CompressionMethod> methods) |
| { |
| int off = getCompressionMethodsOffset(); |
| ensureCapacity(off + methods.size() + 1); |
| buffer.put(off, (byte) methods.size()); |
| for (CompressionMethod method : methods) |
| buffer.put(++off, (byte) method.getValue()); |
| } |
| |
| public void setExtensionsLength (final int length) |
| { |
| if (length < 0 || length > 16384) |
| throw new IllegalArgumentException("length must be nonnegative and not exceed 16384"); |
| int needed = getExtensionsOffset() + 2 + length; |
| if (buffer.capacity() < needed) |
| ensureCapacity(needed); |
| buffer.putShort(getExtensionsOffset(), (short) length); |
| } |
| |
| public void setExtensions(ByteBuffer extensions) |
| { |
| int elen = extensions.getShort(0) & 0xFFFF; |
| setExtensionsLength(elen); |
| ((ByteBuffer) buffer.duplicate().position(getExtensionsOffset())).put(extensions); |
| } |
| |
| public void setDisableExtensions(boolean disableExtensions) |
| { |
| this.disableExtensions = disableExtensions; |
| } |
| |
| public void ensureCapacity(final int length) |
| { |
| if (buffer.capacity() >= length) |
| return; |
| ByteBuffer newBuf = ByteBuffer.allocate(length); |
| newBuf.put((ByteBuffer) buffer.position(0)); |
| newBuf.position(0); |
| this.buffer = newBuf; |
| } |
| } |