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Diffstat (limited to 'libjava/classpath/gnu/javax/net/ssl/provider/ServerKeyExchange.java')
| -rw-r--r-- | libjava/classpath/gnu/javax/net/ssl/provider/ServerKeyExchange.java | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/javax/net/ssl/provider/ServerKeyExchange.java b/libjava/classpath/gnu/javax/net/ssl/provider/ServerKeyExchange.java new file mode 100644 index 000000000..1206ae6b2 --- /dev/null +++ b/libjava/classpath/gnu/javax/net/ssl/provider/ServerKeyExchange.java @@ -0,0 +1,173 @@ +/* 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(); + } +} |