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+/* 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.BufferedReader;
+import java.io.DataInputStream;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.io.StringReader;
+import java.io.StringWriter;
+
+import java.math.BigInteger;
+
+import java.security.PublicKey;
+import java.security.interfaces.RSAKey;
+import javax.crypto.interfaces.DHPublicKey;
+
+final class ClientKeyExchange implements Handshake.Body
+{
+
+ // Fields.
+ // -------------------------------------------------------------------------
+
+ private final Object exObject;
+
+ // Constructors.
+ // -------------------------------------------------------------------------
+
+ ClientKeyExchange(byte[] encryptedSecret)
+ {
+ exObject = encryptedSecret;
+ }
+
+ ClientKeyExchange(BigInteger bigint)
+ {
+ exObject = bigint;
+ }
+
+ // Class method.
+ // -------------------------------------------------------------------------
+
+ static ClientKeyExchange read(InputStream in, CipherSuite suite,
+ PublicKey key)
+ throws IOException
+ {
+ DataInputStream din = new DataInputStream(in);
+ if (suite.getKeyExchange().equals("RSA"))
+ {
+ int len = 0;
+ if (suite.getVersion() == ProtocolVersion.SSL_3)
+ {
+ len = (((RSAKey) key).getModulus().bitLength()+7) / 8;
+ }
+ else
+ {
+ len = din.readUnsignedShort();
+ }
+ byte[] buf = new byte[len];
+ din.readFully(buf);
+ return new ClientKeyExchange(buf);
+ }
+ else if (suite.getKeyExchange().equals("SRP"))
+ {
+ byte[] buf = new byte[din.readUnsignedShort()];
+ din.readFully(buf);
+ return new ClientKeyExchange(new BigInteger(1, buf));
+ }
+ else if (key == null || !(key instanceof DHPublicKey)) // explicit.
+ {
+ byte[] buf = new byte[din.readUnsignedShort()];
+ din.readFully(buf);
+ return new ClientKeyExchange(new BigInteger(1, buf));
+ }
+ else
+ {
+ return new ClientKeyExchange(new byte[0]);
+ }
+ }
+
+ // Instance methods.
+ // -------------------------------------------------------------------------
+
+ public void write(OutputStream out) throws IOException
+ {
+ throw new UnsupportedOperationException("use write(java.io.OutputStream,ProtocolVersion) instead");
+ }
+
+ public void write(OutputStream out, ProtocolVersion version) throws IOException
+ {
+ if (exObject instanceof byte[])
+ {
+ byte[] b = (byte[]) exObject;
+ if (b.length > 0)
+ {
+ if (version != ProtocolVersion.SSL_3)
+ {
+ out.write(b.length >>> 8 & 0xFF);
+ out.write(b.length & 0xFF);
+ }
+ out.write(b);
+ }
+ }
+ else
+ {
+ byte[] bigint = ((BigInteger) exObject).toByteArray();
+ if (bigint[0] == 0x00)
+ {
+ out.write(bigint.length - 1 >>> 8 & 0xFF);
+ out.write(bigint.length - 1 & 0xFF);
+ out.write(bigint, 1, bigint.length - 1);
+ }
+ else
+ {
+ out.write(bigint.length >>> 8 & 0xFF);
+ out.write(bigint.length & 0xFF);
+ out.write(bigint);
+ }
+ }
+ }
+
+ Object getExchangeObject()
+ {
+ return exObject;
+ }
+
+ public String toString()
+ {
+ StringWriter str = new StringWriter();
+ PrintWriter out = new PrintWriter(str);
+ out.println("struct {");
+ if (exObject instanceof byte[] && ((byte[]) exObject).length > 0)
+ {
+ out.println(" encryptedPreMasterSecret =");
+ out.print(Util.hexDump((byte[]) exObject, " "));
+ }
+ else if (exObject instanceof BigInteger)
+ {
+ out.println(" clientPublic = " + ((BigInteger) exObject).toString(16) + ";");
+ }
+ out.println("} ClientKeyExchange;");
+ return str.toString();
+ }
+}
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