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| 1 | +/* | |
| 2 | + * Copyright (c) 1997, 2009, Oracle and/or its affiliates. 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. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package sun.security.x509; | |
| 27 | + | |
| 28 | +import java.io.IOException; | |
| 29 | +import java.io.OutputStream; | |
| 30 | +import java.util.Enumeration; | |
| 31 | + | |
| 32 | +import sun.security.util.*; | |
| 33 | + | |
| 34 | +/** | |
| 35 | + * This class represents the Authority Key Identifier Extension. | |
| 36 | + * | |
| 37 | + * <p>The authority key identifier extension provides a means of | |
| 38 | + * identifying the particular public key used to sign a certificate. | |
| 39 | + * This extension would be used where an issuer has multiple signing | |
| 40 | + * keys (either due to multiple concurrent key pairs or due to | |
| 41 | + * changeover). | |
| 42 | + * <p> | |
| 43 | + * The ASN.1 syntax for this is: | |
| 44 | + * <pre> | |
| 45 | + * AuthorityKeyIdentifier ::= SEQUENCE { | |
| 46 | + * keyIdentifier [0] KeyIdentifier OPTIONAL, | |
| 47 | + * authorityCertIssuer [1] GeneralNames OPTIONAL, | |
| 48 | + * authorityCertSerialNumber [2] CertificateSerialNumber OPTIONAL | |
| 49 | + * } | |
| 50 | + * KeyIdentifier ::= OCTET STRING | |
| 51 | + * </pre> | |
| 52 | + * @author Amit Kapoor | |
| 53 | + * @author Hemma Prafullchandra | |
| 54 | + * @see Extension | |
| 55 | + * @see CertAttrSet | |
| 56 | + */ | |
| 57 | +public class AuthorityKeyIdentifierExtension extends Extension | |
| 58 | +implements CertAttrSet<String> { | |
| 59 | + /** | |
| 60 | + * Identifier for this attribute, to be used with the | |
| 61 | + * get, set, delete methods of Certificate, x509 type. | |
| 62 | + */ | |
| 63 | + public static final String IDENT = | |
| 64 | + "x509.info.extensions.AuthorityKeyIdentifier"; | |
| 65 | + /** | |
| 66 | + * Attribute names. | |
| 67 | + */ | |
| 68 | + public static final String NAME = "AuthorityKeyIdentifier"; | |
| 69 | + public static final String KEY_ID = "key_id"; | |
| 70 | + public static final String AUTH_NAME = "auth_name"; | |
| 71 | + public static final String SERIAL_NUMBER = "serial_number"; | |
| 72 | + | |
| 73 | + // Private data members | |
| 74 | + private static final byte TAG_ID = 0; | |
| 75 | + private static final byte TAG_NAMES = 1; | |
| 76 | + private static final byte TAG_SERIAL_NUM = 2; | |
| 77 | + | |
| 78 | + private KeyIdentifier id = null; | |
| 79 | + private GeneralNames names = null; | |
| 80 | + private SerialNumber serialNum = null; | |
| 81 | + | |
| 82 | + // Encode only the extension value | |
| 83 | + private void encodeThis() throws IOException { | |
| 84 | + if (id == null && names == null && serialNum == null) { | |
| 85 | + this.extensionValue = null; | |
| 86 | + return; | |
| 87 | + } | |
| 88 | + DerOutputStream seq = new DerOutputStream(); | |
| 89 | + DerOutputStream tmp = new DerOutputStream(); | |
| 90 | + if (id != null) { | |
| 91 | + DerOutputStream tmp1 = new DerOutputStream(); | |
| 92 | + id.encode(tmp1); | |
| 93 | + tmp.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT, | |
| 94 | + false, TAG_ID), tmp1); | |
| 95 | + } | |
| 96 | + try { | |
| 97 | + if (names != null) { | |
| 98 | + DerOutputStream tmp1 = new DerOutputStream(); | |
| 99 | + names.encode(tmp1); | |
| 100 | + tmp.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT, | |
| 101 | + true, TAG_NAMES), tmp1); | |
| 102 | + } | |
| 103 | + } catch (Exception e) { | |
| 104 | + throw new IOException(e.toString()); | |
| 105 | + } | |
| 106 | + if (serialNum != null) { | |
| 107 | + DerOutputStream tmp1 = new DerOutputStream(); | |
| 108 | + serialNum.encode(tmp1); | |
| 109 | + tmp.writeImplicit(DerValue.createTag(DerValue.TAG_CONTEXT, | |
| 110 | + false, TAG_SERIAL_NUM), tmp1); | |
| 111 | + } | |
| 112 | + seq.write(DerValue.tag_Sequence, tmp); | |
| 113 | + this.extensionValue = seq.toByteArray(); | |
| 114 | + } | |
| 115 | + | |
| 116 | + /** | |
| 117 | + * The default constructor for this extension. Null parameters make | |
| 118 | + * the element optional (not present). | |
| 119 | + * | |
| 120 | + * @param id the KeyIdentifier associated with this extension. | |
| 121 | + * @param names the GeneralNames associated with this extension | |
| 122 | + * @param serialNum the CertificateSerialNumber associated with | |
| 123 | + * this extension. | |
| 124 | + * @exception IOException on error. | |
| 125 | + */ | |
| 126 | + public AuthorityKeyIdentifierExtension(KeyIdentifier kid, GeneralNames name, | |
| 127 | + SerialNumber sn) | |
| 128 | + throws IOException { | |
| 129 | + this.id = kid; | |
| 130 | + this.names = name; | |
| 131 | + this.serialNum = sn; | |
| 132 | + | |
| 133 | + this.extensionId = PKIXExtensions.AuthorityKey_Id; | |
| 134 | + this.critical = false; | |
| 135 | + encodeThis(); | |
| 136 | + } | |
| 137 | + | |
| 138 | + /** | |
| 139 | + * Create the extension from the passed DER encoded value of the same. | |
| 140 | + * | |
| 141 | + * @param critical true if the extension is to be treated as critical. | |
| 142 | + * @param value an array of DER encoded bytes of the actual value. | |
| 143 | + * @exception ClassCastException if value is not an array of bytes | |
| 144 | + * @exception IOException on error. | |
| 145 | + */ | |
| 146 | + public AuthorityKeyIdentifierExtension(Boolean critical, Object value) | |
| 147 | + throws IOException { | |
| 148 | + this.extensionId = PKIXExtensions.AuthorityKey_Id; | |
| 149 | + this.critical = critical.booleanValue(); | |
| 150 | + | |
| 151 | + this.extensionValue = (byte[]) value; | |
| 152 | + DerValue val = new DerValue(this.extensionValue); | |
| 153 | + if (val.tag != DerValue.tag_Sequence) { | |
| 154 | + throw new IOException("Invalid encoding for " + | |
| 155 | + "AuthorityKeyIdentifierExtension."); | |
| 156 | + } | |
| 157 | + | |
| 158 | + // Note that all the fields in AuthorityKeyIdentifier are defined as | |
| 159 | + // being OPTIONAL, i.e., there could be an empty SEQUENCE, resulting | |
| 160 | + // in val.data being null. | |
| 161 | + while ((val.data != null) && (val.data.available() != 0)) { | |
| 162 | + DerValue opt = val.data.getDerValue(); | |
| 163 | + | |
| 164 | + // NB. this is always encoded with the IMPLICIT tag | |
| 165 | + // The checks only make sense if we assume implicit tagging, | |
| 166 | + // with explicit tagging the form is always constructed. | |
| 167 | + if (opt.isContextSpecific(TAG_ID) && !opt.isConstructed()) { | |
| 168 | + if (id != null) | |
| 169 | + throw new IOException("Duplicate KeyIdentifier in " + | |
| 170 | + "AuthorityKeyIdentifier."); | |
| 171 | + opt.resetTag(DerValue.tag_OctetString); | |
| 172 | + id = new KeyIdentifier(opt); | |
| 173 | + | |
| 174 | + } else if (opt.isContextSpecific(TAG_NAMES) && | |
| 175 | + opt.isConstructed()) { | |
| 176 | + if (names != null) | |
| 177 | + throw new IOException("Duplicate GeneralNames in " + | |
| 178 | + "AuthorityKeyIdentifier."); | |
| 179 | + opt.resetTag(DerValue.tag_Sequence); | |
| 180 | + names = new GeneralNames(opt); | |
| 181 | + | |
| 182 | + } else if (opt.isContextSpecific(TAG_SERIAL_NUM) && | |
| 183 | + !opt.isConstructed()) { | |
| 184 | + if (serialNum != null) | |
| 185 | + throw new IOException("Duplicate SerialNumber in " + | |
| 186 | + "AuthorityKeyIdentifier."); | |
| 187 | + opt.resetTag(DerValue.tag_Integer); | |
| 188 | + serialNum = new SerialNumber(opt); | |
| 189 | + } else | |
| 190 | + throw new IOException("Invalid encoding of " + | |
| 191 | + "AuthorityKeyIdentifierExtension."); | |
| 192 | + } | |
| 193 | + } | |
| 194 | + | |
| 195 | + /** | |
| 196 | + * Return the object as a string. | |
| 197 | + */ | |
| 198 | + public String toString() { | |
| 199 | + String s = super.toString() + "AuthorityKeyIdentifier [\n"; | |
| 200 | + if (id != null) { | |
| 201 | + s += id.toString(); // id already has a newline | |
| 202 | + } | |
| 203 | + if (names != null) { | |
| 204 | + s += names.toString() + "\n"; | |
| 205 | + } | |
| 206 | + if (serialNum != null) { | |
| 207 | + s += serialNum.toString() + "\n"; | |
| 208 | + } | |
| 209 | + return (s + "]\n"); | |
| 210 | + } | |
| 211 | + | |
| 212 | + /** | |
| 213 | + * Write the extension to the OutputStream. | |
| 214 | + * | |
| 215 | + * @param out the OutputStream to write the extension to. | |
| 216 | + * @exception IOException on error. | |
| 217 | + */ | |
| 218 | + public void encode(OutputStream out) throws IOException { | |
| 219 | + DerOutputStream tmp = new DerOutputStream(); | |
| 220 | + if (this.extensionValue == null) { | |
| 221 | + extensionId = PKIXExtensions.AuthorityKey_Id; | |
| 222 | + critical = false; | |
| 223 | + encodeThis(); | |
| 224 | + } | |
| 225 | + super.encode(tmp); | |
| 226 | + out.write(tmp.toByteArray()); | |
| 227 | + } | |
| 228 | + | |
| 229 | + /** | |
| 230 | + * Set the attribute value. | |
| 231 | + */ | |
| 232 | + public void set(String name, Object obj) throws IOException { | |
| 233 | + if (name.equalsIgnoreCase(KEY_ID)) { | |
| 234 | + if (!(obj instanceof KeyIdentifier)) { | |
| 235 | + throw new IOException("Attribute value should be of " + | |
| 236 | + "type KeyIdentifier."); | |
| 237 | + } | |
| 238 | + id = (KeyIdentifier)obj; | |
| 239 | + } else if (name.equalsIgnoreCase(AUTH_NAME)) { | |
| 240 | + if (!(obj instanceof GeneralNames)) { | |
| 241 | + throw new IOException("Attribute value should be of " + | |
| 242 | + "type GeneralNames."); | |
| 243 | + } | |
| 244 | + names = (GeneralNames)obj; | |
| 245 | + } else if (name.equalsIgnoreCase(SERIAL_NUMBER)) { | |
| 246 | + if (!(obj instanceof SerialNumber)) { | |
| 247 | + throw new IOException("Attribute value should be of " + | |
| 248 | + "type SerialNumber."); | |
| 249 | + } | |
| 250 | + serialNum = (SerialNumber)obj; | |
| 251 | + } else { | |
| 252 | + throw new IOException("Attribute name not recognized by " + | |
| 253 | + "CertAttrSet:AuthorityKeyIdentifier."); | |
| 254 | + } | |
| 255 | + encodeThis(); | |
| 256 | + } | |
| 257 | + | |
| 258 | + /** | |
| 259 | + * Get the attribute value. | |
| 260 | + */ | |
| 261 | + public Object get(String name) throws IOException { | |
| 262 | + if (name.equalsIgnoreCase(KEY_ID)) { | |
| 263 | + return (id); | |
| 264 | + } else if (name.equalsIgnoreCase(AUTH_NAME)) { | |
| 265 | + return (names); | |
| 266 | + } else if (name.equalsIgnoreCase(SERIAL_NUMBER)) { | |
| 267 | + return (serialNum); | |
| 268 | + } else { | |
| 269 | + throw new IOException("Attribute name not recognized by " + | |
| 270 | + "CertAttrSet:AuthorityKeyIdentifier."); | |
| 271 | + } | |
| 272 | + } | |
| 273 | + | |
| 274 | + /** | |
| 275 | + * Delete the attribute value. | |
| 276 | + */ | |
| 277 | + public void delete(String name) throws IOException { | |
| 278 | + if (name.equalsIgnoreCase(KEY_ID)) { | |
| 279 | + id = null; | |
| 280 | + } else if (name.equalsIgnoreCase(AUTH_NAME)) { | |
| 281 | + names = null; | |
| 282 | + } else if (name.equalsIgnoreCase(SERIAL_NUMBER)) { | |
| 283 | + serialNum = null; | |
| 284 | + } else { | |
| 285 | + throw new IOException("Attribute name not recognized by " + | |
| 286 | + "CertAttrSet:AuthorityKeyIdentifier."); | |
| 287 | + } | |
| 288 | + encodeThis(); | |
| 289 | + } | |
| 290 | + | |
| 291 | + /** | |
| 292 | + * Return an enumeration of names of attributes existing within this | |
| 293 | + * attribute. | |
| 294 | + */ | |
| 295 | + public Enumeration<String> getElements() { | |
| 296 | + AttributeNameEnumeration elements = new AttributeNameEnumeration(); | |
| 297 | + elements.addElement(KEY_ID); | |
| 298 | + elements.addElement(AUTH_NAME); | |
| 299 | + elements.addElement(SERIAL_NUMBER); | |
| 300 | + | |
| 301 | + return (elements.elements()); | |
| 302 | + } | |
| 303 | + | |
| 304 | + /** | |
| 305 | + * Return the name of this attribute. | |
| 306 | + */ | |
| 307 | + public String getName() { | |
| 308 | + return (NAME); | |
| 309 | + } | |
| 310 | +} | |