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Diffstat (limited to 'libjava/classpath/gnu/javax/net/ssl/provider/ServerHello.java')
| -rw-r--r-- | libjava/classpath/gnu/javax/net/ssl/provider/ServerHello.java | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/javax/net/ssl/provider/ServerHello.java b/libjava/classpath/gnu/javax/net/ssl/provider/ServerHello.java new file mode 100644 index 000000000..944194b3e --- /dev/null +++ b/libjava/classpath/gnu/javax/net/ssl/provider/ServerHello.java @@ -0,0 +1,231 @@ +/* ServerHello.java -- SSL ServerHello 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; + +/** + * The server hello message. + * + * <pre> +struct +{ + ProtocolVersion server_version; + Random random; + SessionID session_id; + CipherSuite cipher_suite; + CompressionMethod compression_method; + Extensions server_hello_extension_list<0..2^16-1> +} ServerHello; +</pre> + * + * <p>Server hello messages may contain extra data after the + * <tt>compression_method</tt> field, which are interpreted as + * extensions to the basic handshake. + */ +public class ServerHello implements Handshake.Body +{ + + // Fields. + // ------------------------------------------------------------------------- + + protected static final int RANDOM_OFFSET = 2; + protected static final int SESSID_OFFSET = 32 + RANDOM_OFFSET; + protected static final int SESSID_OFFSET2 = SESSID_OFFSET + 1; + + protected ByteBuffer buffer; + protected boolean disableExtensions; + + // Constructor. + // ------------------------------------------------------------------------- + + public ServerHello (final ByteBuffer buffer) + { + this.buffer = buffer; + disableExtensions = false; + } + + public int length () + { + int sessionLen = buffer.get(SESSID_OFFSET) & 0xFF; + int len = SESSID_OFFSET2 + sessionLen + 3; + int elen = 0; + if (!disableExtensions && len + 1 < buffer.limit() + && (elen = buffer.getShort(len)) != 0) + len += 2 + elen; + return len; + } + + /** + * Returns the server's protocol version. This will read two bytes + * from the beginning of the underlying buffer, and return an + * instance of the appropriate {@link ProtocolVersion}; if the + * version read is a supported version, this method returns a static + * constant instance. + * + * @return The server's protocol version. + */ + public ProtocolVersion version() + { + return ProtocolVersion.getInstance (buffer.getShort (0)); + } + + /** + * Returns the server's random value. This method returns a + * lightwieght wrapper around the existing bytes; modifications to + * the underlying buffer will modify the returned object, and + * vice-versa. + * + * @return The server's random value. + */ + public Random random() + { + ByteBuffer randomBuf = + ((ByteBuffer) buffer.duplicate ().position (RANDOM_OFFSET) + .limit (SESSID_OFFSET)).slice (); + return new Random (randomBuf); + } + + /** + * Returns the session ID. This method returns a new byte array with + * the session ID bytes. + * + * @return The session ID. + */ + public byte[] sessionId() + { + int idlen = buffer.get (SESSID_OFFSET) & 0xFF; + byte[] sessionId = new byte[idlen]; + buffer.position (SESSID_OFFSET2); + buffer.get (sessionId); + return sessionId; + } + + /** + * Returns the server's chosen cipher suite. The returned cipher + * suite will be "resolved" to this structure's version. + * + * @return The server's chosen cipher suite. + */ + public CipherSuite cipherSuite() + { + int offset = SESSID_OFFSET2 + (buffer.get(SESSID_OFFSET) & 0xFF); + return CipherSuite.forValue(buffer.getShort(offset)).resolve(); + } + + /** + * Returns the server's chosen compression method. + * + * @return The chosen compression method. + */ + public CompressionMethod compressionMethod() + { + int offset = SESSID_OFFSET2 + (buffer.get(SESSID_OFFSET) & 0xFF) + 2; + return CompressionMethod.getInstance(buffer.get(offset) & 0xFF); + } + + public int extensionsLength() + { + int offset = SESSID_OFFSET2 + (buffer.get (SESSID_OFFSET) & 0xFF) + 3; + if (offset + 1 >= buffer.limit()) + return 0; + return buffer.getShort(offset) & 0xFFFF; + } + + public ExtensionList extensions () + { + int offset = SESSID_OFFSET2 + (buffer.get (SESSID_OFFSET) & 0xFF) + 3; + if (offset + 1 >= buffer.limit()) + return null; + int len = buffer.getShort(offset) & 0xFFFF; + if (len == 0) + len = buffer.limit() - offset - 2; + ByteBuffer ebuf = ((ByteBuffer) buffer.duplicate().position(offset) + .limit(offset + len + 2)).slice(); + return new ExtensionList(ebuf); + } + + 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; + out.print (subprefix); + out.print ("version: "); + out.print (version ()); + out.println (";"); + out.print (subprefix); + out.println ("random:"); + out.println (random ().toString (subprefix)); + out.print (subprefix); + out.print ("sessionId: "); + out.print (Util.toHexString(sessionId (), ':')); + out.println (";"); + out.print (subprefix); + out.print ("cipherSuite: "); + out.print (cipherSuite ()); + out.println (";"); + out.print (subprefix); + out.print ("compressionMethod: "); + out.print (compressionMethod ()); + out.println (";"); + ExtensionList exts = extensions (); + out.print (subprefix); + out.println ("extensions:"); + out.println (exts != null ? exts.toString (subprefix+" ") + : subprefix + " (nil)"); + if (prefix != null) + out.print (prefix); + out.print ("} ServerHello;"); + return str.toString(); + } +} |