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 }