001 /* Certificate.java -- base class of public-key certificates. 002 Copyright (C) 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 javax.security.cert; 040 041 import java.security.InvalidKeyException; 042 import java.security.NoSuchAlgorithmException; 043 import java.security.NoSuchProviderException; 044 import java.security.PublicKey; 045 import java.security.SignatureException; 046 047 import java.util.Arrays; 048 import java.util.zip.Adler32; 049 050 /** 051 * <p>The base class for public-key certificates.</p> 052 * 053 * <p><b>This class is deprecated in favor of the {@link 054 * java.security.cert.Certificate} class. It should not be used in new 055 * applications.</b></p> 056 */ 057 public abstract class Certificate 058 { 059 060 // Constructors. 061 // ------------------------------------------------------------------------- 062 063 public Certificate() 064 { 065 super(); 066 } 067 068 // Instance methods. 069 // ------------------------------------------------------------------------- 070 071 /** 072 * <p>Tests if this certificate equals another.</p> 073 * 074 * @param other The object to test. 075 * @return True if the certificates are equal. 076 */ 077 public boolean equals(Object other) 078 { 079 if (other == null || !(other instanceof Certificate)) 080 { 081 return false; 082 } 083 if (other == this) 084 { 085 return true; 086 } 087 try 088 { 089 return Arrays.equals(getEncoded(), ((Certificate) other).getEncoded()); 090 } 091 catch (CertificateEncodingException cee) 092 { 093 return false; 094 } 095 } 096 097 /** 098 * <p>Computes a hash code for this certificate.</p> 099 * 100 * @return The hash code. 101 */ 102 public int hashCode() 103 { 104 try 105 { 106 Adler32 csum = new Adler32(); 107 csum.update(getEncoded()); 108 return (int) csum.getValue(); 109 } 110 catch (CertificateEncodingException cee) 111 { 112 return 0; 113 } 114 } 115 116 // Abstract methods. 117 // ------------------------------------------------------------------------- 118 119 /** 120 * <p>Return the encoded form of this certificate.</p> 121 * 122 * @return The encoded form. 123 * @throws CertificateEncodingException If the certificate could not be 124 * encoded. 125 */ 126 public abstract byte[] getEncoded() throws CertificateEncodingException; 127 128 /** 129 * <p>Verifies the signature of this certificate.</p> 130 * 131 * @param key The signer's public key. 132 * @throws CertificateException 133 * @throws NoSuchAlgorithmException If the algorithm used to sign the 134 * certificate is not available. 135 * @throws InvalidKeyException If the supplied key is not appropriate for the 136 * certificate's signature algorithm. 137 * @throws NoSuchProviderException 138 * @throws SignatureException If the signature could not be verified. 139 */ 140 public abstract void verify(PublicKey key) 141 throws CertificateException, NoSuchAlgorithmException, InvalidKeyException, 142 NoSuchProviderException, SignatureException; 143 144 /** 145 * <p>Verifies the signature of this certificate, using the specified security 146 * provider.</p> 147 * 148 * @param key The signer's public key. 149 * @param sigProvider The name of the signature provider. 150 * @throws CertificateException 151 * @throws NoSuchAlgorithmException If the algorithm used to sign the 152 * certificate is not available. 153 * @throws InvalidKeyException If the supplied key is not appropriate for the 154 * certificate's signature algorithm. 155 * @throws NoSuchProviderException If <i>sigProvider</i> is not the name of an 156 * installed provider. 157 * @throws SignatureException If the signature could not be verified. 158 */ 159 public abstract void verify(PublicKey key, String sigProvider) 160 throws CertificateException, NoSuchAlgorithmException, InvalidKeyException, 161 NoSuchProviderException, SignatureException; 162 163 /** 164 * <p>Returns a printable representation of this certificate.</p> 165 * 166 * @return The string. 167 */ 168 public abstract String toString(); 169 170 /** 171 * <p>Returns this certificate's public key.</p> 172 * 173 * @return The public key. 174 */ 175 public abstract PublicKey getPublicKey(); 176 }