Source for gnu.inet.util.SaslOutputStream

   1: /*
   2:  * SaslOutputStream.java
   3:  * Copyright (C) 2002 The Free Software Foundation
   4:  * 
   5:  * This file is part of GNU inetlib, a library.
   6:  * 
   7:  * GNU inetlib is free software; you can redistribute it and/or modify
   8:  * it under the terms of the GNU General Public License as published by
   9:  * the Free Software Foundation; either version 2 of the License, or
  10:  * (at your option) any later version.
  11:  * 
  12:  * GNU inetlib is distributed in the hope that it will be useful,
  13:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15:  * GNU General Public License for more details.
  16:  * 
  17:  * You should have received a copy of the GNU General Public License
  18:  * along with this library; if not, write to the Free Software
  19:  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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:  * obliged to do so.  If you do not wish to do so, delete this
  36:  * exception statement from your version.
  37:  */
  38: 
  39: package gnu.inet.util;
  40: 
  41: import java.io.FilterOutputStream;
  42: import java.io.IOException;
  43: import java.io.OutputStream;
  44: 
  45: import javax.security.sasl.SaslClient;
  46: 
  47: /**
  48:  * A filter output stream that encodes data written to it using a SASL
  49:  * client.
  50:  *
  51:  * @author <a href="mailto:dog@gnu.org">Chris Burdess</a>
  52:  */
  53: public class SaslOutputStream
  54:   extends FilterOutputStream
  55: {
  56: 
  57:   /*
  58:    * The SASL client used for encoding data.
  59:    */
  60:   private final SaslClient sasl;
  61: 
  62:   /**
  63:    * Constructor.
  64:    * @param sasl the SASL client
  65:    * @param out the target output stream
  66:    */
  67:   public SaslOutputStream(SaslClient sasl, OutputStream out)
  68:   {
  69:     super(out);
  70:     this.sasl = sasl;
  71:   }
  72: 
  73:   /**
  74:    * Character write.
  75:    */
  76:   public void write(int c)
  77:     throws IOException
  78:   {
  79:     byte[] bytes = new byte[1];
  80:     bytes[0] = (byte) c;
  81:     write(bytes, 0, 1);
  82:   }
  83: 
  84:   public void write(byte[] bytes)
  85:     throws IOException
  86:   {
  87:     write(bytes, 0, bytes.length);
  88:   }
  89:   
  90:   /**
  91:    * Block write.
  92:    */
  93:   public void write(byte[] bytes, int off, int len)
  94:     throws IOException
  95:   {
  96:     byte[] wrapped = sasl.wrap(bytes, off, len);
  97:     super.write(wrapped, 0, wrapped.length);
  98:   }
  99:   
 100: }