| /* ClientKeyExchange.java -- SSL ClientKeyExchange message. |
| 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.io.PrintWriter; |
| import java.io.StringWriter; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| |
| /** |
| * The client key exchange message. |
| * |
| * <pre> |
| struct { |
| select (KeyExchangeAlgorithm) { |
| case rsa: EncryptedPreMasterSecret; |
| case diffie_hellman: ClientDiffieHellmanPublic; |
| } exchange_keys; |
| } ClientKeyExchange;</pre> |
| */ |
| public class ClientKeyExchange implements Handshake.Body |
| { |
| |
| // Fields. |
| // ------------------------------------------------------------------------- |
| |
| protected ByteBuffer buffer; |
| protected final CipherSuite suite; |
| protected final ProtocolVersion version; |
| |
| // Constructors. |
| // ------------------------------------------------------------------------- |
| |
| public ClientKeyExchange (final ByteBuffer buffer, final CipherSuite suite, |
| final ProtocolVersion version) |
| { |
| suite.getClass(); |
| version.getClass (); |
| this.buffer = buffer.duplicate().order(ByteOrder.BIG_ENDIAN); |
| this.suite = suite; |
| this.version = version; |
| } |
| |
| // Instance methods. |
| // ------------------------------------------------------------------------- |
| |
| public ExchangeKeys exchangeKeys () |
| { |
| KeyExchangeAlgorithm alg = suite.keyExchangeAlgorithm(); |
| if (alg == KeyExchangeAlgorithm.RSA) |
| return new EncryptedPreMasterSecret(buffer, version); |
| else if (alg == KeyExchangeAlgorithm.DH_anon |
| || alg == KeyExchangeAlgorithm.DHE_DSS |
| || alg == KeyExchangeAlgorithm.DHE_RSA) |
| return new ClientDiffieHellmanPublic(buffer.duplicate()); |
| else if (alg == KeyExchangeAlgorithm.DHE_PSK) |
| return new ClientDHE_PSKParameters(buffer.duplicate()); |
| else if (alg == KeyExchangeAlgorithm.PSK) |
| return new ClientPSKParameters(buffer.duplicate()); |
| else if (alg == KeyExchangeAlgorithm.RSA_PSK) |
| return new ClientRSA_PSKParameters(buffer.duplicate()); |
| else if (alg == KeyExchangeAlgorithm.NONE) |
| return new EmptyExchangeKeys(); |
| throw new IllegalArgumentException("unsupported key exchange: " + alg); |
| } |
| |
| public int length() |
| { |
| if (suite.keyExchangeAlgorithm() == KeyExchangeAlgorithm.NONE) |
| return 0; |
| return exchangeKeys().length(); |
| } |
| |
| public String toString () |
| { |
| return toString (null); |
| } |
| |
| public String toString (final String prefix) |
| { |
| StringWriter str = new StringWriter(); |
| PrintWriter out = new PrintWriter(str); |
| if (prefix != null) |
| out.print (prefix); |
| out.println("struct {"); |
| String subprefix = " "; |
| if (prefix != null) |
| subprefix = prefix + subprefix; |
| out.println (exchangeKeys ().toString (subprefix)); |
| if (prefix != null) |
| out.print (prefix); |
| out.println("} ClientKeyExchange;"); |
| return str.toString(); |
| } |
| } |