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

   1: /* KeyUsage.java -- the key usage extension.
   2:    Copyright (C) 2004  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.BitString;
  43: import gnu.java.security.der.DER;
  44: import gnu.java.security.der.DERReader;
  45: import gnu.java.security.der.DERValue;
  46: 
  47: import java.io.IOException;
  48: 
  49: public class KeyUsage extends Extension.Value
  50: {
  51: 
  52:   // Constants and fields.
  53:   // -------------------------------------------------------------------------
  54: 
  55:   public static final OID ID = new OID("2.5.29.15");
  56:   public static final int DIGITAL_SIGNATURE = 0;
  57:   public static final int NON_REPUDIATION   = 1;
  58:   public static final int KEY_ENCIPHERMENT  = 2;
  59:   public static final int DATA_ENCIPHERMENT = 3;
  60:   public static final int KEY_AGREEMENT     = 4;
  61:   public static final int KEY_CERT_SIGN     = 5;
  62:   public static final int CRL_SIGN          = 6;
  63:   public static final int ENCIPHER_ONLY     = 7;
  64:   public static final int DECIPHER_ONLY     = 8;
  65: 
  66:   private final BitString keyUsage;
  67: 
  68:   // Constructor.
  69:   // -------------------------------------------------------------------------
  70: 
  71:   public KeyUsage(final byte[] encoded) throws IOException
  72:   {
  73:     super(encoded);
  74:     DERValue val = DERReader.read(encoded);
  75:     if (val.getTag() != DER.BIT_STRING)
  76:       throw new IOException("malformed KeyUsage");
  77:     keyUsage = (BitString) val.getValue();
  78:   }
  79: 
  80:   // Instance methods.
  81:   // -------------------------------------------------------------------------
  82: 
  83:   public BitString getKeyUsage()
  84:   {
  85:     return keyUsage;
  86:   }
  87: 
  88:   public String toString()
  89:   {
  90:     return KeyUsage.class.getName() + " [ " + keyUsage + " ]";
  91:   }
  92: }