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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2011, 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 java.security.cert; | ||
| 27 | |||
| 28 | import java.util.Arrays; | ||
| 29 | |||
| 30 | import java.security.PublicKey; | ||
| 31 | import java.security.NoSuchAlgorithmException; | ||
| 32 | import java.security.NoSuchProviderException; | ||
| 33 | import java.security.InvalidKeyException; | ||
| 34 | import java.security.SignatureException; | ||
| 35 | |||
| 36 | import sun.security.x509.X509CertImpl; | ||
| 37 | |||
| 38 | /** | ||
| 39 | * <p>Abstract class for managing a variety of identity certificates. | ||
| 40 | * An identity certificate is a binding of a principal to a public key which | ||
| 41 | * is vouched for by another principal. (A principal represents | ||
| 42 | * an entity such as an individual user, a group, or a corporation.) | ||
| 43 | *<p> | ||
| 44 | * This class is an abstraction for certificates that have different | ||
| 45 | * formats but important common uses. For example, different types of | ||
| 46 | * certificates, such as X.509 and PGP, share general certificate | ||
| 47 | * functionality (like encoding and verifying) and | ||
| 48 | * some types of information (like a public key). | ||
| 49 | * <p> | ||
| 50 | * X.509, PGP, and SDSI certificates can all be implemented by | ||
| 51 | * subclassing the Certificate class, even though they contain different | ||
| 52 | * sets of information, and they store and retrieve the information in | ||
| 53 | * different ways. | ||
| 54 | * | ||
| 55 | * @see X509Certificate | ||
| 56 | * @see CertificateFactory | ||
| 57 | * | ||
| 58 | * @author Hemma Prafullchandra | ||
| 59 | */ | ||
| 60 | |||
| 61 | public abstract class Certificate implements java.io.Serializable { | ||
| 62 | |||
| 63 | private static final long serialVersionUID = -3585440601605666277L; | ||
| 64 | |||
| 65 | // the certificate type | ||
| 66 | private final String type; | ||
| 67 | |||
| 68 | /** | ||
| 69 | * Creates a certificate of the specified type. | ||
| 70 | * | ||
| 71 | * @param type the standard name of the certificate type. | ||
| 72 | * See the CertificateFactory section in the <a href= | ||
| 73 | * "{@docRoot}/../technotes/guides/security/StandardNames.html#CertificateFactory"> | ||
| 74 | * Java Cryptography Architecture Standard Algorithm Name Documentation</a> | ||
| 75 | * for information about standard certificate types. | ||
| 76 | */ | ||
| 77 | protected Certificate(String type) { | ||
| 78 | this.type = type; | ||
| 79 | } | ||
| 80 | |||
| 81 | /** | ||
| 82 | * Returns the type of this certificate. | ||
| 83 | * | ||
| 84 | * @return the type of this certificate. | ||
| 85 | */ | ||
| 86 | public final String getType() { | ||
| 87 | return this.type; | ||
| 88 | } | ||
| 89 | |||
| 90 | /** | ||
| 91 | * Compares this certificate for equality with the specified | ||
| 92 | * object. If the <code>other</code> object is an | ||
| 93 | * <code>instanceof</code> <code>Certificate</code>, then | ||
| 94 | * its encoded form is retrieved and compared with the | ||
| 95 | * encoded form of this certificate. | ||
| 96 | * | ||
| 97 | * @param other the object to test for equality with this certificate. | ||
| 98 | * @return true iff the encoded forms of the two certificates | ||
| 99 | * match, false otherwise. | ||
| 100 | */ | ||
| 101 | public boolean equals(Object other) { | ||
| 102 | if (this == other) { | ||
| 103 | return true; | ||
| 104 | } | ||
| 105 | if (!(other instanceof Certificate)) { | ||
| 106 | return false; | ||
| 107 | } | ||
| 108 | try { | ||
| 109 | byte[] thisCert = X509CertImpl.getEncodedInternal(this); | ||
| 110 | byte[] otherCert = X509CertImpl.getEncodedInternal((Certificate)other); | ||
| 111 | |||
| 112 | return Arrays.equals(thisCert, otherCert); | ||
| 113 | } catch (CertificateException e) { | ||
| 114 | return false; | ||
| 115 | } | ||
| 116 | } | ||
| 117 | |||
| 118 | /** | ||
| 119 | * Returns a hashcode value for this certificate from its | ||
| 120 | * encoded form. | ||
| 121 | * | ||
| 122 | * @return the hashcode value. | ||
| 123 | */ | ||
| 124 | public int hashCode() { | ||
| 125 | int retval = 0; | ||
| 126 | try { | ||
| 127 | byte[] certData = X509CertImpl.getEncodedInternal(this); | ||
| 128 | for (int i = 1; i < certData.length; i++) { | ||
| 129 | retval += certData[i] * i; | ||
| 130 | } | ||
| 131 | return retval; | ||
| 132 | } catch (CertificateException e) { | ||
| 133 | return retval; | ||
| 134 | } | ||
| 135 | } | ||
| 136 | |||
| 137 | /** | ||
| 138 | * Returns the encoded form of this certificate. It is | ||
| 139 | * assumed that each certificate type would have only a single | ||
| 140 | * form of encoding; for example, X.509 certificates would | ||
| 141 | * be encoded as ASN.1 DER. | ||
| 142 | * | ||
| 143 | * @return the encoded form of this certificate | ||
| 144 | * | ||
| 145 | * @exception CertificateEncodingException if an encoding error occurs. | ||
| 146 | */ | ||
| 147 | public abstract byte[] getEncoded() | ||
| 148 | throws CertificateEncodingException; | ||
| 149 | |||
| 150 | /** | ||
| 151 | * Verifies that this certificate was signed using the | ||
| 152 | * private key that corresponds to the specified public key. | ||
| 153 | * | ||
| 154 | * @param key the PublicKey used to carry out the verification. | ||
| 155 | * | ||
| 156 | * @exception NoSuchAlgorithmException on unsupported signature | ||
| 157 | * algorithms. | ||
| 158 | * @exception InvalidKeyException on incorrect key. | ||
| 159 | * @exception NoSuchProviderException if there's no default provider. | ||
| 160 | * @exception SignatureException on signature errors. | ||
| 161 | * @exception CertificateException on encoding errors. | ||
| 162 | */ | ||
| 163 | public abstract void verify(PublicKey key) | ||
| 164 | throws CertificateException, NoSuchAlgorithmException, | ||
| 165 | InvalidKeyException, NoSuchProviderException, | ||
| 166 | SignatureException; | ||
| 167 | |||
| 168 | /** | ||
| 169 | * Verifies that this certificate was signed using the | ||
| 170 | * private key that corresponds to the specified public key. | ||
| 171 | * This method uses the signature verification engine | ||
| 172 | * supplied by the specified provider. | ||
| 173 | * | ||
| 174 | * @param key the PublicKey used to carry out the verification. | ||
| 175 | * @param sigProvider the name of the signature provider. | ||
| 176 | * | ||
| 177 | * @exception NoSuchAlgorithmException on unsupported signature | ||
| 178 | * algorithms. | ||
| 179 | * @exception InvalidKeyException on incorrect key. | ||
| 180 | * @exception NoSuchProviderException on incorrect provider. | ||
| 181 | * @exception SignatureException on signature errors. | ||
| 182 | * @exception CertificateException on encoding errors. | ||
| 183 | */ | ||
| 184 | public abstract void verify(PublicKey key, String sigProvider) | ||
| 185 | throws CertificateException, NoSuchAlgorithmException, | ||
| 186 | InvalidKeyException, NoSuchProviderException, | ||
| 187 | SignatureException; | ||
| 188 | |||
| 189 | /** | ||
| 190 | * Returns a string representation of this certificate. | ||
| 191 | * | ||
| 192 | * @return a string representation of this certificate. | ||
| 193 | */ | ||
| 194 | public abstract String toString(); | ||
| 195 | |||
| 196 | /** | ||
| 197 | * Gets the public key from this certificate. | ||
| 198 | * | ||
| 199 | * @return the public key. | ||
| 200 | */ | ||
| 201 | public abstract PublicKey getPublicKey(); | ||
| 202 | |||
| 203 | /** | ||
| 204 | * Alternate Certificate class for serialization. | ||
| 205 | * @since 1.3 | ||
| 206 | */ | ||
| 207 | protected static class CertificateRep implements java.io.Serializable { | ||
| 208 | |||
| 209 | private static final long serialVersionUID = -8563758940495660020L; | ||
| 210 | |||
| 211 | private String type; | ||
| 212 | private byte[] data; | ||
| 213 | |||
| 214 | /** | ||
| 215 | * Construct the alternate Certificate class with the Certificate | ||
| 216 | * type and Certificate encoding bytes. | ||
| 217 | * | ||
| 218 | * <p> | ||
| 219 | * | ||
| 220 | * @param type the standard name of the Certificate type. <p> | ||
| 221 | * | ||
| 222 | * @param data the Certificate data. | ||
| 223 | */ | ||
| 224 | protected CertificateRep(String type, byte[] data) { | ||
| 225 | this.type = type; | ||
| 226 | this.data = data; | ||
| 227 | } | ||
| 228 | |||
| 229 | /** | ||
| 230 | * Resolve the Certificate Object. | ||
| 231 | * | ||
| 232 | * <p> | ||
| 233 | * | ||
| 234 | * @return the resolved Certificate Object | ||
| 235 | * | ||
| 236 | * @throws java.io.ObjectStreamException if the Certificate | ||
| 237 | * could not be resolved | ||
| 238 | */ | ||
| 239 | protected Object readResolve() throws java.io.ObjectStreamException { | ||
| 240 | try { | ||
| 241 | CertificateFactory cf = CertificateFactory.getInstance(type); | ||
| 242 | return cf.generateCertificate | ||
| 243 | (new java.io.ByteArrayInputStream(data)); | ||
| 244 | } catch (CertificateException e) { | ||
| 245 | throw new java.io.NotSerializableException | ||
| 246 | ("java.security.cert.Certificate: " + | ||
| 247 | type + | ||
| 248 | ": " + | ||
| 249 | e.getMessage()); | ||
| 250 | } | ||
| 251 | } | ||
| 252 | } | ||
| 253 | |||
| 254 | /** | ||
| 255 | * Replace the Certificate to be serialized. | ||
| 256 | * | ||
| 257 | * @return the alternate Certificate object to be serialized | ||
| 258 | * | ||
| 259 | * @throws java.io.ObjectStreamException if a new object representing | ||
| 260 | * this Certificate could not be created | ||
| 261 | * @since 1.3 | ||
| 262 | */ | ||
| 263 | protected Object writeReplace() throws java.io.ObjectStreamException { | ||
| 264 | try { | ||
| 265 | return new CertificateRep(type, getEncoded()); | ||
| 266 | } catch (CertificateException e) { | ||
| 267 | throw new java.io.NotSerializableException | ||
| 268 | ("java.security.cert.Certificate: " + | ||
| 269 | type + | ||
| 270 | ": " + | ||
| 271 | e.getMessage()); | ||
| 272 | } | ||
| 273 | } | ||
| 274 | } | ||