Source for gnu.java.security.x509.ext.ExtendedKeyUsage

   1: /* ExtendedKeyUsage.java -- the extended key usage extension.
   2:    Copyright (C) 2004, 2006  Free Software Foundation, Inc.
   3: 
   4: This file is 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, or (at your option)
   9: 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; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 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.java.security.x509.ext;
  40: 
  41: import gnu.java.security.OID;
  42: import gnu.java.security.der.DER;
  43: import gnu.java.security.der.DERReader;
  44: import gnu.java.security.der.DERValue;
  45: 
  46: import java.io.IOException;
  47: import java.util.Collections;
  48: import java.util.LinkedList;
  49: import java.util.List;
  50: 
  51: public class ExtendedKeyUsage extends Extension.Value
  52: {
  53: 
  54:   // Constants and fields.
  55:   // -------------------------------------------------------------------------
  56: 
  57:   public static final OID ID = new OID("2.5.29.37");
  58: 
  59:   private final List<OID> purposeIds;
  60: 
  61:   // Constructor.
  62:   // -------------------------------------------------------------------------
  63: 
  64:   public ExtendedKeyUsage(final byte[] encoded) throws IOException
  65:   {
  66:     super(encoded);
  67:     DERReader der = new DERReader(encoded);
  68:     DERValue usageList = der.read();
  69:     if (!usageList.isConstructed())
  70:       throw new IOException("malformed ExtKeyUsageSyntax");
  71:     int len = 0;
  72:     purposeIds = new LinkedList<OID>();
  73:     while (len < usageList.getLength())
  74:       {
  75:         DERValue val = der.read();
  76:         if (val.getTag() != DER.OBJECT_IDENTIFIER)
  77:           throw new IOException("malformed KeyPurposeId");
  78:         purposeIds.add((OID) val.getValue());
  79:         len += val.getEncodedLength();
  80:       }
  81:   }
  82: 
  83:   // Instance method.
  84:   // -------------------------------------------------------------------------
  85: 
  86:   public List<OID> getPurposeIds()
  87:   {
  88:     return Collections.unmodifiableList(purposeIds);
  89:   }
  90: 
  91:   public String toString()
  92:   {
  93:     return ExtendedKeyUsage.class.getName() + " [ " + purposeIds + " ]";
  94:   }
  95: }