J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.security.x509; |
| 27 | |
| 28 | import java.io.IOException; |
| 29 | import java.io.OutputStream; |
| 30 | import java.math.BigInteger; |
| 31 | import java.util.Enumeration; |
| 32 | |
| 33 | import sun.security.util.*; |
| 34 | |
| 35 | /** |
| 36 | * Represent the CRL Number Extension. |
| 37 | * |
| 38 | * <p>This extension, if present, conveys a monotonically increasing |
| 39 | * sequence number for each CRL issued by a given CA through a specific |
| 40 | * CA X.500 Directory entry or CRL distribution point. This extension |
| 41 | * allows users to easily determine when a particular CRL supersedes |
| 42 | * another CRL. |
| 43 | * |
| 44 | * @author Hemma Prafullchandra |
| 45 | * @see Extension |
| 46 | * @see CertAttrSet |
| 47 | */ |
| 48 | public class CRLNumberExtension extends Extension |
| 49 | implements CertAttrSet<String> { |
| 50 | |
| 51 | /** |
| 52 | * Attribute name. |
| 53 | */ |
| 54 | public static final String NAME = "CRLNumber"; |
| 55 | public static final String NUMBER = "value"; |
| 56 | |
| 57 | private static final String LABEL = "CRL Number"; |
| 58 | |
| 59 | private BigInteger crlNumber = null; |
| 60 | private String extensionName; |
| 61 | private String extensionLabel; |
| 62 | |
| 63 | // Encode this extension value |
| 64 | private void encodeThis() throws IOException { |
| 65 | if (crlNumber == null) { |
| 66 | this.extensionValue = null; |
| 67 | return; |
| 68 | } |
| 69 | DerOutputStream os = new DerOutputStream(); |
| 70 | os.putInteger(this.crlNumber); |
| 71 | this.extensionValue = os.toByteArray(); |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Create a CRLNumberExtension with the integer value . |
| 76 | * The criticality is set to false. |
| 77 | * |
| 78 | * @param crlNum the value to be set for the extension. |
| 79 | */ |
| 80 | public CRLNumberExtension(int crlNum) throws IOException { |
| 81 | this(PKIXExtensions.CRLNumber_Id, false, BigInteger.valueOf(crlNum), |
| 82 | NAME, LABEL); |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Create a CRLNumberExtension with the BigInteger value . |
| 87 | * The criticality is set to false. |
| 88 | * |
| 89 | * @param crlNum the value to be set for the extension. |
| 90 | */ |
| 91 | public CRLNumberExtension(BigInteger crlNum) throws IOException { |
| 92 | this(PKIXExtensions.CRLNumber_Id, false, crlNum, NAME, LABEL); |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Creates the extension (also called by the subclass). |
| 97 | */ |
| 98 | protected CRLNumberExtension(ObjectIdentifier extensionId, |
| 99 | boolean isCritical, BigInteger crlNum, String extensionName, |
| 100 | String extensionLabel) throws IOException { |
| 101 | |
| 102 | this.extensionId = extensionId; |
| 103 | this.critical = isCritical; |
| 104 | this.crlNumber = crlNum; |
| 105 | this.extensionName = extensionName; |
| 106 | this.extensionLabel = extensionLabel; |
| 107 | encodeThis(); |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * Create the extension from the passed DER encoded value of the same. |
| 112 | * |
| 113 | * @param critical true if the extension is to be treated as critical. |
| 114 | * @param value an array of DER encoded bytes of the actual value. |
| 115 | * @exception ClassCastException if value is not an array of bytes |
| 116 | * @exception IOException on error. |
| 117 | */ |
| 118 | public CRLNumberExtension(Boolean critical, Object value) |
| 119 | throws IOException { |
| 120 | this(PKIXExtensions.CRLNumber_Id, critical, value, NAME, LABEL); |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Creates the extension (also called by the subclass). |
| 125 | */ |
| 126 | protected CRLNumberExtension(ObjectIdentifier extensionId, |
| 127 | Boolean critical, Object value, String extensionName, |
| 128 | String extensionLabel) throws IOException { |
| 129 | |
| 130 | this.extensionId = extensionId; |
| 131 | this.critical = critical.booleanValue(); |
| 132 | this.extensionValue = (byte[]) value; |
| 133 | DerValue val = new DerValue(this.extensionValue); |
| 134 | this.crlNumber = val.getBigInteger(); |
| 135 | this.extensionName = extensionName; |
| 136 | this.extensionLabel = extensionLabel; |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * Set the attribute value. |
| 141 | */ |
| 142 | public void set(String name, Object obj) throws IOException { |
| 143 | if (name.equalsIgnoreCase(NUMBER)) { |
| 144 | if (!(obj instanceof BigInteger)) { |
| 145 | throw new IOException("Attribute must be of type BigInteger."); |
| 146 | } |
| 147 | crlNumber = (BigInteger)obj; |
| 148 | } else { |
| 149 | throw new IOException("Attribute name not recognized by" |
| 150 | + " CertAttrSet:" + extensionName + "."); |
| 151 | } |
| 152 | encodeThis(); |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * Get the attribute value. |
| 157 | */ |
| 158 | public Object get(String name) throws IOException { |
| 159 | if (name.equalsIgnoreCase(NUMBER)) { |
| 160 | if (crlNumber == null) return null; |
| 161 | else return crlNumber; |
| 162 | } else { |
| 163 | throw new IOException("Attribute name not recognized by" |
| 164 | + " CertAttrSet:" + extensionName + "."); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * Delete the attribute value. |
| 170 | */ |
| 171 | public void delete(String name) throws IOException { |
| 172 | if (name.equalsIgnoreCase(NUMBER)) { |
| 173 | crlNumber = null; |
| 174 | } else { |
| 175 | throw new IOException("Attribute name not recognized by" |
| 176 | + " CertAttrSet:" + extensionName + "."); |
| 177 | } |
| 178 | encodeThis(); |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * Returns a printable representation of the CRLNumberExtension. |
| 183 | */ |
| 184 | public String toString() { |
| 185 | String s = super.toString() + extensionLabel + ": " + |
| 186 | ((crlNumber == null) ? "" : Debug.toHexString(crlNumber)) |
| 187 | + "\n"; |
| 188 | return (s); |
| 189 | } |
| 190 | |
| 191 | /** |
| 192 | * Write the extension to the DerOutputStream. |
| 193 | * |
| 194 | * @param out the DerOutputStream to write the extension to. |
| 195 | * @exception IOException on encoding errors. |
| 196 | */ |
| 197 | public void encode(OutputStream out) throws IOException { |
| 198 | DerOutputStream tmp = new DerOutputStream(); |
| 199 | encode(out, PKIXExtensions.CRLNumber_Id, true); |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * Write the extension to the DerOutputStream. |
| 204 | * (Also called by the subclass) |
| 205 | */ |
| 206 | protected void encode(OutputStream out, ObjectIdentifier extensionId, |
| 207 | boolean isCritical) throws IOException { |
| 208 | |
| 209 | DerOutputStream tmp = new DerOutputStream(); |
| 210 | |
| 211 | if (this.extensionValue == null) { |
| 212 | this.extensionId = extensionId; |
| 213 | this.critical = isCritical; |
| 214 | encodeThis(); |
| 215 | } |
| 216 | super.encode(tmp); |
| 217 | out.write(tmp.toByteArray()); |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * Return an enumeration of names of attributes existing within this |
| 222 | * attribute. |
| 223 | */ |
| 224 | public Enumeration<String> getElements() { |
| 225 | AttributeNameEnumeration elements = new AttributeNameEnumeration(); |
| 226 | elements.addElement(NUMBER); |
| 227 | return (elements.elements()); |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * Return the name of this attribute. |
| 232 | */ |
| 233 | public String getName() { |
| 234 | return (extensionName); |
| 235 | } |
| 236 | } |