001 /* PolicyQualifierInfo.java -- policy qualifier info object.
002 Copyright (C) 2003, 2004 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038
039 package java.security.cert;
040
041 import gnu.java.io.ASN1ParsingException;
042 import gnu.java.security.OID;
043 import gnu.java.security.der.DERReader;
044 import gnu.java.security.der.DERValue;
045
046 import java.io.ByteArrayInputStream;
047 import java.io.IOException;
048
049 /**
050 * The PolicyQualifierInfo X.509 certificate extension.
051 * PolicyQualifierInfo objects are represented by the ASN.1 structure:
052 *
053 * <pre>
054 * PolicyQualifierInfo ::= SEQUENCE {
055 * policyQualifierId PolicyQualifierId,
056 * qualifier ANY DEFINED BY policyQualifierId
057 * }
058 *
059 * PolicyQualifierId ::= OBJECT IDENTIFIER
060 * </pre>
061 *
062 * @since 1.4
063 * @specnote this class was final in 1.4, but beginning with 1.5 is not
064 */
065 public class PolicyQualifierInfo
066 {
067
068 // Fields.
069 // ------------------------------------------------------------------------
070
071 /** The <code>policyQualifierId</code> field. */
072 private OID oid;
073
074 /** The DER encoded form of this object. */
075 private byte[] encoded;
076
077 /** The DER encoded form of the <code>qualifier</code> field. */
078 private DERValue qualifier;
079
080 // Constructor.
081 // ------------------------------------------------------------------------
082
083 /**
084 * Create a new PolicyQualifierInfo object from the DER encoded form
085 * passed in the byte array. The argument is copied.
086 *
087 * <p>The ASN.1 form of PolicyQualifierInfo is:
088 <pre>
089 PolicyQualifierInfo ::= SEQUENCE {
090 policyQualifierId PolicyQualifierId,
091 qualifier ANY DEFINED BY policyQualifierId
092 }
093
094 PolicyQualifierId ::= OBJECT IDENTIFIER
095 </pre>
096 *
097 * @param encoded The DER encoded form.
098 * @throws IOException If the structure cannot be parsed from the
099 * encoded bytes.
100 */
101 public PolicyQualifierInfo(byte[] encoded) throws IOException
102 {
103 if (encoded == null)
104 throw new IOException("null bytes");
105 this.encoded = (byte[]) encoded.clone();
106 DERReader in = new DERReader(new ByteArrayInputStream(this.encoded));
107 DERValue qualInfo = in.read();
108 if (!qualInfo.isConstructed())
109 throw new ASN1ParsingException("malformed PolicyQualifierInfo");
110 DERValue val = in.read();
111 if (!(val.getValue() instanceof OID))
112 throw new ASN1ParsingException("value read not an OBJECT IDENTIFIER");
113 oid = (OID) val.getValue();
114 if (val.getEncodedLength() < val.getLength())
115 qualifier = in.read();
116 }
117
118 // Instance methods.
119 // ------------------------------------------------------------------------
120
121 /**
122 * Returns the <code>policyQualifierId</code> field of this structure,
123 * as a dotted-decimal representation of the object identifier.
124 *
125 * @return This structure's OID field.
126 */
127 public final String getPolicyQualifierId()
128 {
129 return oid.toString();
130 }
131
132 /**
133 * Returns the DER encoded form of this object; the contents of the
134 * returned byte array are equivalent to those that were passed to the
135 * constructor. The byte array is cloned every time this method is
136 * called.
137 *
138 * @return The encoded form.
139 */
140 public final byte[] getEncoded()
141 {
142 return (byte[]) encoded.clone();
143 }
144
145 /**
146 * Get the <code>qualifier</code> field of this object, as a DER
147 * encoded byte array. The byte array returned is cloned every time
148 * this method is called.
149 *
150 * @return The encoded qualifier.
151 */
152 public final byte[] getPolicyQualifier()
153 {
154 if (qualifier == null)
155 return new byte[0];
156 return qualifier.getEncoded();
157 }
158
159 /**
160 * Returns a printable string representation of this object.
161 *
162 * @return The string representation.
163 */
164 public String toString()
165 {
166 return "PolicyQualifierInfo { policyQualifierId ::= " + oid
167 + ", qualifier ::= " + qualifier + " }";
168 }
169 }