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 gnu.classpath.debug.Component;
  42: import gnu.classpath.debug.SystemLogger;
  43: 
  44: import java.io.PrintWriter;
  45: import java.io.StringWriter;
  46: import java.nio.ByteBuffer;
  47: import java.nio.ByteOrder;
  48: import java.nio.CharBuffer;
  49: import java.nio.charset.Charset;
  50: 
  51: /**
  52:  * <pre>
  53:       struct {
  54:           select (KeyExchangeAlgorithm) {
  55:               /* other cases for rsa, diffie_hellman, etc. &#42;/
  56:               case psk:   /* NEW &#42;/
  57:                   opaque psk_identity&lt;0..2^16-1&gt;;
  58:           } exchange_keys;
  59:       } ClientKeyExchange;</pre>
  60:  *
  61:  * @author Casey Marshall (csm@gnu.org)
  62:  */
  63: public class ClientPSKParameters extends ExchangeKeys implements Builder, Constructed
  64: {
  65:   public ClientPSKParameters(ByteBuffer buffer)
  66:   {
  67:     super(buffer);
  68:   }
  69: 
  70:   public ClientPSKParameters(String identity)
  71:   {
  72:     super(null);
  73:     Charset utf8 = Charset.forName("UTF-8");
  74:     ByteBuffer idBuf = utf8.encode(CharBuffer.wrap(identity));
  75:     buffer = ByteBuffer.allocate(idBuf.remaining() + 2);
  76:     buffer.putShort((short) idBuf.remaining());
  77:     buffer.put(idBuf);
  78:     buffer.rewind();
  79:   }
  80:   
  81:   /* (non-Javadoc)
  82:    * @see gnu.javax.net.ssl.provider.Builder#buffer()
  83:    */
  84:   public ByteBuffer buffer()
  85:   {
  86:     return (ByteBuffer) buffer.duplicate().rewind().limit(length());
  87:   }
  88: 
  89:   /* (non-Javadoc)
  90:    * @see gnu.javax.net.ssl.provider.Constructed#length()
  91:    */
  92:   public int length()
  93:   {
  94:     return (buffer.getShort(0) & 0xFFFF) + 2;
  95:   }
  96:   
  97:   public String identity()
  98:   {
  99:     Charset utf8 = Charset.forName("UTF-8");
 100:     return utf8.decode((ByteBuffer) buffer.duplicate().position(2).limit(length())).toString();
 101:   }
 102:   
 103:   public @Override String toString()
 104:   {
 105:     return toString(null);
 106:   }
 107: 
 108:   /* (non-Javadoc)
 109:    * @see gnu.javax.net.ssl.provider.Constructed#toString(java.lang.String)
 110:    */
 111:   public String toString(String prefix)
 112:   {
 113:     StringWriter str = new StringWriter();
 114:     PrintWriter out = new PrintWriter(str);
 115:     if (prefix != null) out.print(prefix);
 116:     out.println("struct {");
 117:     if (prefix != null) out.print(prefix);
 118:     out.print("  identity = ");
 119:     out.print(identity());
 120:     out.println(";");
 121:     if (prefix != null) out.print(prefix);
 122:     out.print("} ClientPSKParameters;");
 123:     return str.toString();
 124:   }
 125: }