1 /* Extension.java -- an X.509 certificate or CRL extension.
2 Copyright (C) 2004 Free Software Foundation, Inc.
4 This file is part of GNU Classpath.
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)
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.
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
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
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. */
39 package gnu.java.security.x509.ext;
41 import gnu.java.security.Configuration;
42 import gnu.java.security.OID;
43 import gnu.java.security.der.DER;
44 import gnu.java.security.der.DERReader;
45 import gnu.java.security.der.DERValue;
46 import gnu.java.security.x509.Util;
48 import java.io.IOException;
49 import java.util.ArrayList;
50 import java.util.Arrays;
51 import java.util.List;
52 import java.util.logging.Logger;
54 public class Extension
56 private static final Logger log = Logger.getLogger(Extension.class.getName());
58 * This extension's object identifier.
60 protected final OID oid;
63 * The criticality flag.
65 protected final boolean critical;
68 * Whether or not this extension is locally supported.
70 protected boolean isSupported;
73 * The extension value.
75 protected final Value value;
78 * The DER encoded form.
80 protected byte[] encoded;
83 // -------------------------------------------------------------------------
85 public Extension(byte[] encoded) throws IOException
87 this.encoded = (byte[]) encoded.clone();
88 DERReader der = new DERReader(encoded);
90 // Extension ::= SEQUENCE {
91 DERValue val = der.read();
92 if (Configuration.DEBUG)
93 log.fine("read val tag == " + val.getTag() + " len == " + val.getLength());
94 if (!val.isConstructed())
95 throw new IOException("malformed Extension");
97 // extnID OBJECT IDENTIFIER,
99 if (val.getTag() != DER.OBJECT_IDENTIFIER)
100 throw new IOException("expecting OBJECT IDENTIFIER");
101 oid = (OID) val.getValue();
102 if (Configuration.DEBUG)
103 log.fine("read oid == " + oid);
105 // critical BOOLEAN DEFAULT FALSE,
107 if (val.getTag() == DER.BOOLEAN)
109 critical = ((Boolean) val.getValue()).booleanValue();
114 if (Configuration.DEBUG)
115 log.fine("is critical == " + critical);
117 // extnValue OCTET STRING }
118 if (val.getTag() != DER.OCTET_STRING)
119 throw new IOException("expecting OCTET STRING");
120 byte[] encval = (byte[]) val.getValue();
122 if (oid.equals(AuthorityKeyIdentifier.ID))
124 value = new AuthorityKeyIdentifier(encval);
126 else if (oid.equals(SubjectKeyIdentifier.ID))
128 value = new SubjectKeyIdentifier(encval);
130 else if (oid.equals(KeyUsage.ID))
132 value = new KeyUsage(encval);
134 else if (oid.equals(PrivateKeyUsagePeriod.ID))
136 value = new PrivateKeyUsagePeriod(encval);
138 else if (oid.equals(CertificatePolicies.ID))
140 value = new CertificatePolicies(encval);
142 else if (oid.equals (PolicyConstraint.ID))
144 value = new PolicyConstraint (encval);
146 else if (oid.equals(PolicyMappings.ID))
148 value = new PolicyMappings(encval);
150 else if (oid.equals(SubjectAlternativeNames.ID))
152 value = new SubjectAlternativeNames(encval);
154 else if (oid.equals(IssuerAlternativeNames.ID))
156 value = new IssuerAlternativeNames(encval);
158 else if (oid.equals(BasicConstraints.ID))
160 value = new BasicConstraints(encval);
162 else if (oid.equals(ExtendedKeyUsage.ID))
164 value = new ExtendedKeyUsage(encval);
166 else if (oid.equals(CRLNumber.ID))
168 value = new CRLNumber(encval);
170 else if (oid.equals(ReasonCode.ID))
172 value = new ReasonCode(encval);
176 value = new Value(encval);
179 if (Configuration.DEBUG)
180 log.fine("read value == " + value);
183 public Extension (final OID oid, final Value value, final boolean critical)
187 this.critical = critical;
192 // -------------------------------------------------------------------------
199 public boolean isCritical()
204 public boolean isSupported()
209 public Value getValue()
214 public byte[] getEncoded()
218 return (byte[]) encoded.clone();
221 public String toString()
223 return Extension.class.getName() + " [ id=" + oid + " critical=" +
224 critical + " value=" + value + " ]";
227 public DERValue getDerValue()
229 List ext = new ArrayList (3);
230 ext.add (new DERValue (DER.OBJECT_IDENTIFIER, oid));
231 ext.add (new DERValue (DER.BOOLEAN, Boolean.valueOf (critical)));
232 ext.add (new DERValue (DER.OCTET_STRING, value.getEncoded()));
233 return new DERValue (DER.CONSTRUCTED|DER.SEQUENCE, ext);
237 // -------------------------------------------------------------------------
239 private void encode()
241 encoded = getDerValue().getEncoded();
245 // -------------------------------------------------------------------------
247 public static class Value
251 // -----------------------------------------------------------------------
253 protected byte[] encoded;
256 // -----------------------------------------------------------------------
258 public Value(byte[] encoded)
260 this.encoded = (byte[]) encoded.clone();
263 protected Value() { }
266 // -----------------------------------------------------------------------
268 public byte[] getEncoded()
270 return (byte[]) encoded;
273 public int hashCode()
276 for (int i = 0; i < encoded.length; ++i)
277 result = result * 31 + encoded[i];
281 public boolean equals(Object o)
283 if (!(o instanceof Value))
285 return Arrays.equals(encoded, ((Value) o).encoded);
288 public String toString()
290 return Util.toHexString(encoded, ':');