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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 | } | ||