Source for gnu.javax.net.ssl.provider.ClientPSKParameters

   1: /* ClientPSKParameters.java --
   2:    Copyright (C) 2006  Free Software Foundation, Inc.
   3: 
   4: This file is a part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2 of the License, or (at
   9: your option) any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; if not, write to the Free Software
  18: Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
  19: USA
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package gnu.javax.net.ssl.provider;
  40: 
  41: import java.io.PrintWriter;
  42: import java.io.StringWriter;
  43: import java.nio.ByteBuffer;
  44: import java.nio.CharBuffer;
  45: import java.nio.charset.Charset;
  46: 
  47: /**
  48:  * <pre>
  49:       struct {
  50:           select (KeyExchangeAlgorithm) {
  51:               /* other cases for rsa, diffie_hellman, etc. &#42;/
  52:               case psk:   /* NEW &#42;/
  53:                   opaque psk_identity&lt;0..2^16-1&gt;;
  54:           } exchange_keys;
  55:       } ClientKeyExchange;</pre>
  56:  *
  57:  * @author Casey Marshall (csm@gnu.org)
  58:  */
  59: public class ClientPSKParameters extends ExchangeKeys implements Builder, Constructed
  60: {
  61:   public ClientPSKParameters(ByteBuffer buffer)
  62:   {
  63:     super(buffer);
  64:   }
  65: 
  66:   public ClientPSKParameters(String identity)
  67:   {
  68:     super(null);
  69:     Charset utf8 = Charset.forName("UTF-8");
  70:     ByteBuffer idBuf = utf8.encode(CharBuffer.wrap(identity));
  71:     buffer = ByteBuffer.allocate(idBuf.remaining() + 2);
  72:     buffer.putShort((short) idBuf.remaining());
  73:     buffer.put(idBuf);
  74:     buffer.rewind();
  75:   }
  76: 
  77:   /* (non-Javadoc)
  78:    * @see gnu.javax.net.ssl.provider.Builder#buffer()
  79:    */
  80:   public ByteBuffer buffer()
  81:   {
  82:     return (ByteBuffer) buffer.duplicate().rewind().limit(length());
  83:   }
  84: 
  85:   /* (non-Javadoc)
  86:    * @see gnu.javax.net.ssl.provider.Constructed#length()
  87:    */
  88:   public int length()
  89:   {
  90:     return (buffer.getShort(0) & 0xFFFF) + 2;
  91:   }
  92: 
  93:   public String identity()
  94:   {
  95:     Charset utf8 = Charset.forName("UTF-8");
  96:     return utf8.decode((ByteBuffer) buffer.duplicate().position(2).limit(length())).toString();
  97:   }
  98: 
  99:   public @Override String toString()
 100:   {
 101:     return toString(null);
 102:   }
 103: 
 104:   /* (non-Javadoc)
 105:    * @see gnu.javax.net.ssl.provider.Constructed#toString(java.lang.String)
 106:    */
 107:   public String toString(String prefix)
 108:   {
 109:     StringWriter str = new StringWriter();
 110:     PrintWriter out = new PrintWriter(str);
 111:     if (prefix != null) out.print(prefix);
 112:     out.println("struct {");
 113:     if (prefix != null) out.print(prefix);
 114:     out.print("  identity = ");
 115:     out.print(identity());
 116:     out.println(";");
 117:     if (prefix != null) out.print(prefix);
 118:     out.print("} ClientPSKParameters;");
 119:     return str.toString();
 120:   }
 121: }