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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/javax/net/ssl/provider/ServerKeyExchange.java
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+/* ServerKeyExchange.java -- SSL ServerKeyExchange 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 server key exchange message.
+ *
+ * <pre>
+struct
+{
+ select (KeyExchangeAlgorithm)
+ {
+ case diffie_hellman:
+ ServerDHParams params;
+ Signature signed_params;
+ case rsa:
+ ServerRSAParams params;
+ Signature signed_params;
+ case srp:
+ ServerSRPParams params;
+ Signature signed_params;
+ };
+} ServerKeyExchange;
+</pre>
+ */
+public class ServerKeyExchange implements Handshake.Body
+{
+
+ protected ByteBuffer buffer;
+ protected final CipherSuite suite;
+
+ public ServerKeyExchange(final ByteBuffer buffer, final CipherSuite suite)
+ {
+ suite.getClass();
+ this.buffer = buffer.duplicate().order(ByteOrder.BIG_ENDIAN);
+ this.suite = suite;
+ }
+
+ public int length ()
+ {
+ if (suite.keyExchangeAlgorithm ().equals (KeyExchangeAlgorithm.NONE))
+ return 0;
+ int len = 0;
+ ServerKeyExchangeParams params = params();
+ Signature sig = signature();
+ if (params != null)
+ len += params.length();
+ if (sig != null)
+ len += sig.length();
+ return len;
+ }
+
+ /**
+ * Returns the server's key exchange parameters. The value returned will
+ * depend on the key exchange algorithm this object was created with.
+ *
+ * @return The server's key exchange parameters.
+ */
+ public ServerKeyExchangeParams params ()
+ {
+ KeyExchangeAlgorithm kex = suite.keyExchangeAlgorithm ();
+ if (kex == KeyExchangeAlgorithm.RSA)
+ return new ServerRSAParams(buffer.duplicate ());
+ else if (kex == KeyExchangeAlgorithm.DHE_DSS
+ || kex == KeyExchangeAlgorithm.DHE_RSA
+ || kex == KeyExchangeAlgorithm.DH_anon)
+ return new ServerDHParams(buffer.duplicate());
+// else if (kex.equals (KeyExchangeAlgorithm.SRP))
+// return new ServerSRPParams (buffer.duplicate ());
+ else if (kex == KeyExchangeAlgorithm.NONE)
+ return null;
+ else if (kex == KeyExchangeAlgorithm.DHE_PSK)
+ return new ServerDHE_PSKParameters(buffer.duplicate());
+ else if (kex == KeyExchangeAlgorithm.PSK)
+ return new ServerPSKParameters(buffer.duplicate());
+ else if (kex == KeyExchangeAlgorithm.RSA_PSK)
+ return new ServerPSKParameters(buffer.duplicate());
+ throw new IllegalArgumentException ("unsupported key exchange: " + kex);
+ }
+
+ /**
+ * Returns the digital signature made over the key exchange parameters.
+ *
+ * @return The signature.
+ */
+ public Signature signature ()
+ {
+ KeyExchangeAlgorithm kex = suite.keyExchangeAlgorithm();
+ if (kex == KeyExchangeAlgorithm.NONE
+ || kex == KeyExchangeAlgorithm.DH_anon
+ || kex == KeyExchangeAlgorithm.DHE_PSK
+ || kex == KeyExchangeAlgorithm.PSK
+ || kex == KeyExchangeAlgorithm.RSA_PSK)
+ return null;
+ ServerKeyExchangeParams params = params();
+ ByteBuffer sigbuf = ((ByteBuffer) buffer.position(params.length ())).slice ();
+ return new Signature (sigbuf, suite.signatureAlgorithm ());
+ }
+
+ 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 {");
+ if (prefix != null) out.print (prefix);
+ out.print (" algorithm: ");
+ out.print (suite.keyExchangeAlgorithm ());
+ out.println (";");
+ if (!suite.keyExchangeAlgorithm ().equals (KeyExchangeAlgorithm.NONE))
+ {
+ if (prefix != null) out.print (prefix);
+ out.println (" parameters:");
+ out.println (params ().toString (prefix != null ? prefix+" " : " "));
+ }
+ if (!suite.signatureAlgorithm ().equals (SignatureAlgorithm.ANONYMOUS))
+ {
+ if (prefix != null) out.print (prefix);
+ out.println (" signature:");
+ out.println (signature ().toString (prefix != null ? prefix+" " : " "));
+ }
+ if (prefix != null) out.print (prefix);
+ out.print ("} ServerKeyExchange;");
+ return str.toString();
+ }
+}