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

   1: /* EncryptedPreMasterSecret.java -- RSA encrypted secret.
   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: 
  44: import java.nio.ByteBuffer;
  45: 
  46: /**
  47:  * The client's RSA-encrypted pre-master secret.
  48:  *
  49:  * <pre>
  50: struct {
  51:   public-key-encrypted PreMasterSecret pre_master_secret;
  52: } EncryptedPreMasterSecret;</pre>
  53:  */
  54: public final class EncryptedPreMasterSecret extends ExchangeKeys implements Builder
  55: {
  56:   private final ProtocolVersion version;
  57: 
  58:   public EncryptedPreMasterSecret(ByteBuffer buffer, ProtocolVersion version)
  59:   {
  60:     super(buffer);
  61:     version.getClass();
  62:     this.version = version;
  63:   }
  64: 
  65:   public EncryptedPreMasterSecret(byte[] encryptedSecret, ProtocolVersion version)
  66:   {
  67:     this(ByteBuffer.allocate(version == ProtocolVersion.SSL_3
  68:                              ? encryptedSecret.length
  69:                              : encryptedSecret.length + 2), version);
  70:     ByteBuffer b = buffer.duplicate();
  71:     if (version != ProtocolVersion.SSL_3)
  72:       b.putShort((short) encryptedSecret.length);
  73:     b.put(encryptedSecret);
  74:   }
  75: 
  76:   public ByteBuffer buffer()
  77:   {
  78:     return (ByteBuffer) buffer.duplicate().rewind();
  79:   }
  80: 
  81:   public byte[] encryptedSecret()
  82:   {
  83:     byte[] secret;
  84:     if (version == ProtocolVersion.SSL_3)
  85:       {
  86:         buffer.position (0);
  87:         secret = new byte[buffer.limit ()];
  88:         buffer.get(secret);
  89:       }
  90:     else
  91:       {
  92:         int len = buffer.getShort(0) & 0xFFFF;
  93:         secret = new byte[len];
  94:         buffer.position(2);
  95:         buffer.get(secret);
  96:       }
  97:     return secret;
  98:   }
  99: 
 100:   public void setEncryptedSecret(final byte[] secret, final int offset, final int length)
 101:   {
 102:     if (version == ProtocolVersion.SSL_3)
 103:       {
 104:         buffer.position(0);
 105:         buffer.put(secret, offset, length);
 106:         buffer.rewind();
 107:       }
 108:     else
 109:       {
 110:         buffer.putShort(0, (short) length);
 111:         buffer.position(2);
 112:         buffer.put(secret, offset, length);
 113:         buffer.rewind();
 114:       }
 115:   }
 116: 
 117:   public int length ()
 118:   {
 119:     if (version == ProtocolVersion.SSL_3)
 120:       {
 121:         return buffer.capacity();
 122:       }
 123:     else
 124:       {
 125:         return (buffer.getShort(0) & 0xFFFF) + 2;
 126:       }
 127:   }
 128: 
 129:   public String toString ()
 130:   {
 131:     return toString (null);
 132:   }
 133: 
 134:   public String toString (final String prefix)
 135:   {
 136:     StringWriter str = new StringWriter();
 137:     PrintWriter out = new PrintWriter(str);
 138:     if (prefix != null) out.print(prefix);
 139:     out.println("struct {");
 140:     if (prefix != null) out.print(prefix);
 141:     out.println("  pre_master_secret = ");
 142:     out.print(Util.hexDump(encryptedSecret(), prefix != null ? prefix + "    "
 143:                                                              : "    "));
 144:     if (prefix != null) out.print(prefix);
 145:     out.print("} EncryptedPreMasterSecret;");
 146:     return str.toString();
 147:   }
 148: }