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

   1: /* AuthorityKeyIdentifier.java -- Authority key identifier 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.DER;
  43: import gnu.java.security.der.DERReader;
  44: import gnu.java.security.der.DERValue;
  45: import gnu.java.security.x509.Util;
  46: 
  47: import java.io.IOException;
  48: import java.math.BigInteger;
  49: 
  50: public class AuthorityKeyIdentifier extends Extension.Value
  51: {
  52: 
  53:   // Constants and fields.
  54:   // -------------------------------------------------------------------------
  55: 
  56:   public static final OID ID = new OID("2.5.29.35");
  57: 
  58:   private final byte[] keyIdentifier;
  59:   private final GeneralNames authorityCertIssuer;
  60:   private final BigInteger authorityCertSerialNumber;
  61: 
  62:   // Contstructor.
  63:   // -------------------------------------------------------------------------
  64: 
  65:   public AuthorityKeyIdentifier(final byte[] encoded) throws IOException
  66:   {
  67:     super(encoded);
  68:     DERReader der = new DERReader(encoded);
  69: 
  70:     // AuthorityKeyIdentifier ::= SEQUENCE {
  71:     DERValue val = der.read();
  72:     if (!val.isConstructed())
  73:       throw new IOException("malformed AuthorityKeyIdentifier");
  74:     if (val.getLength() > 0)
  75:       val = der.read();
  76: 
  77:     //   keyIdentifier  [0] KeyIdentifier OPTIONAL,
  78:     //   KeyIdentifier ::= OCTET STRING
  79:     if (val.getTagClass() == DER.APPLICATION && val.getTag() == 0)
  80:       {
  81:         keyIdentifier = (byte[]) val.getValue();
  82:         val = der.read();
  83:       }
  84:     else
  85:       keyIdentifier = null;
  86: 
  87:     //   authorityCertIssuer  [1] GeneralNames OPTIONAL,
  88:     if (val.getTagClass() == DER.APPLICATION && val.getTag() == 1)
  89:       {
  90:         byte[] b = val.getEncoded();
  91:         b[0] = (byte) (DER.CONSTRUCTED|DER.SEQUENCE);
  92:         authorityCertIssuer = new GeneralNames(b);
  93:         der.skip(val.getLength());
  94:         val = der.read();
  95:       }
  96:     else
  97:       authorityCertIssuer = null;
  98: 
  99:     //   authorityCertSerialNumber  [2] CertificateSerialNumber OPTIONAL }
 100:     if (val.getTagClass() == DER.APPLICATION && val.getTag() == 2)
 101:       {
 102:         authorityCertSerialNumber = new BigInteger((byte[]) val.getValue());
 103:       }
 104:     else
 105:       authorityCertSerialNumber = null;
 106:   }
 107: 
 108:   // Instance methods.
 109:   // -------------------------------------------------------------------------
 110: 
 111:   public byte[] getKeyIdentifier()
 112:   {
 113:     return keyIdentifier != null ? (byte[]) keyIdentifier.clone() : null;
 114:   }
 115: 
 116:   public GeneralNames getAuthorityCertIssuer()
 117:   {
 118:     return authorityCertIssuer;
 119:   }
 120: 
 121:   public BigInteger getAuthorityCertSerialNumber()
 122:   {
 123:     return authorityCertSerialNumber;
 124:   }
 125: 
 126:   public String toString()
 127:   {
 128:     return AuthorityKeyIdentifier.class.getName() + " [ keyId=" +
 129:       (keyIdentifier != null ? Util.toHexString (keyIdentifier, ':') : "nil") +
 130:       " authorityCertIssuer=" + authorityCertIssuer +
 131:       " authorityCertSerialNumbe=" + authorityCertSerialNumber + " ]";
 132:   }
 133: }