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

   1: /* CertificateBuilder.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.ByteArrayOutputStream;
  42: import java.io.IOException;
  43: import java.nio.ByteBuffer;
  44: import java.util.List;
  45: import java.security.cert.CertificateException;
  46: 
  47: /**
  48:  * Builder for {@link Certificate} objects.
  49:  *
  50:  * @author Casey Marshall (csm@gnu.org)
  51:  */
  52: public class CertificateBuilder extends Certificate implements Builder
  53: {
  54:   public CertificateBuilder(final CertificateType certType)
  55:   {
  56:     super(ByteBuffer.allocate(1024), certType);
  57:   }
  58: 
  59:   /* (non-Javadoc)
  60:    * @see gnu.javax.net.ssl.provider.Builder#buffer()
  61:    */
  62:   public ByteBuffer buffer()
  63:   {
  64:     return ((ByteBuffer) buffer.duplicate().position(0).limit(length())).slice();
  65:   }
  66: 
  67:   public void setCertificates (final List<? extends java.security.cert.Certificate> certificates)
  68:     throws CertificateException
  69:   {
  70:     ByteArrayOutputStream out = new ByteArrayOutputStream(1024);
  71:     for (java.security.cert.Certificate cert : certificates)
  72:       {
  73:         byte[] encoded = cert.getEncoded();
  74:         out.write((encoded.length >>> 16) & 0xFF);
  75:         out.write((encoded.length >>>  8) & 0xFF);
  76:         out.write( encoded.length         & 0xFF);
  77:         try
  78:           {
  79:             out.write(encoded);
  80:           }
  81:         catch (IOException shouldNotHappen)
  82:           {
  83:             // ignore; this is a ByteArrayOutputStream.
  84:           }
  85:       }
  86:     byte[] certs = out.toByteArray();
  87:     // There is only one field in Certificate; so it is easy to reallocate.
  88:     if (buffer.capacity() < certs.length + 3)
  89:       buffer = ByteBuffer.allocate(certs.length + 3);
  90:     buffer.put(0, (byte) (certs.length >>> 16));
  91:     buffer.putShort(1, (short) certs.length);
  92:     ((ByteBuffer) buffer.duplicate().position(3)).put(certs);
  93:   }
  94: }