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/*
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* Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package java.security.cert;
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import java.security.NoSuchAlgorithmException;
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import java.security.NoSuchProviderException;
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import java.security.InvalidKeyException;
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import java.security.SignatureException;
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import java.security.Principal;
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import java.security.PublicKey;
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import javax.security.auth.x500.X500Principal;
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import java.math.BigInteger;
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import java.util.Date;
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import java.util.Set;
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import java.util.Arrays;
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import sun.security.x509.X509CRLImpl;
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/**
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* <p>
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* Abstract class for an X.509 Certificate Revocation List (CRL).
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* A CRL is a time-stamped list identifying revoked certificates.
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* It is signed by a Certificate Authority (CA) and made freely
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* available in a public repository.
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*
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* <p>Each revoked certificate is
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* identified in a CRL by its certificate serial number. When a
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* certificate-using system uses a certificate (e.g., for verifying a
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* remote user's digital signature), that system not only checks the
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* certificate signature and validity but also acquires a suitably-
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* recent CRL and checks that the certificate serial number is not on
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* that CRL. The meaning of "suitably-recent" may vary with local
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* policy, but it usually means the most recently-issued CRL. A CA
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* issues a new CRL on a regular periodic basis (e.g., hourly, daily, or
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* weekly). Entries are added to CRLs as revocations occur, and an
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* entry may be removed when the certificate expiration date is reached.
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* <p>
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* The X.509 v2 CRL format is described below in ASN.1:
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* <pre>
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* CertificateList ::= SEQUENCE {
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* tbsCertList TBSCertList,
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* signatureAlgorithm AlgorithmIdentifier,
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* signature BIT STRING }
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* </pre>
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* <p>
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* More information can be found in
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* <a href="http://www.ietf.org/rfc/rfc3280.txt">RFC 3280: Internet X.509
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* Public Key Infrastructure Certificate and CRL Profile</a>.
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* <p>
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* The ASN.1 definition of <code>tbsCertList</code> is:
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* <pre>
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* TBSCertList ::= SEQUENCE {
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* version Version OPTIONAL,
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* -- if present, must be v2
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* signature AlgorithmIdentifier,
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* issuer Name,
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* thisUpdate ChoiceOfTime,
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* nextUpdate ChoiceOfTime OPTIONAL,
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* revokedCertificates SEQUENCE OF SEQUENCE {
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* userCertificate CertificateSerialNumber,
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* revocationDate ChoiceOfTime,
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* crlEntryExtensions Extensions OPTIONAL
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* -- if present, must be v2
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* } OPTIONAL,
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* crlExtensions [0] EXPLICIT Extensions OPTIONAL
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* -- if present, must be v2
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* }
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* </pre>
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* <p>
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* CRLs are instantiated using a certificate factory. The following is an
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* example of how to instantiate an X.509 CRL:
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* <pre><code>
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* InputStream inStream = null;
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* try {
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* inStream = new FileInputStream("fileName-of-crl");
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* CertificateFactory cf = CertificateFactory.getInstance("X.509");
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* X509CRL crl = (X509CRL)cf.generateCRL(inStream);
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* } finally {
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* if (inStream != null) {
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* inStream.close();
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* }
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* }
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* </code></pre>
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*
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* @author Hemma Prafullchandra
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*
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*
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* @see CRL
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* @see CertificateFactory
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* @see X509Extension
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*/
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public abstract class X509CRL extends CRL implements X509Extension {
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private transient X500Principal issuerPrincipal;
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/**
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* Constructor for X.509 CRLs.
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*/
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protected X509CRL() {
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super("X.509");
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}
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/**
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* Compares this CRL for equality with the given
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* object. If the <code>other</code> object is an
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* <code>instanceof</code> <code>X509CRL</code>, then
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* its encoded form is retrieved and compared with the
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* encoded form of this CRL.
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*
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* @param other the object to test for equality with this CRL.
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*
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* @return true iff the encoded forms of the two CRLs
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* match, false otherwise.
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*/
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public boolean equals(Object other) {
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if (this == other) {
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return true;
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}
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if (!(other instanceof X509CRL)) {
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return false;
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}
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try {
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byte[] thisCRL = X509CRLImpl.getEncodedInternal(this);
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byte[] otherCRL = X509CRLImpl.getEncodedInternal((X509CRL)other);
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return Arrays.equals(thisCRL, otherCRL);
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} catch (CRLException e) {
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return false;
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}
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}
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/**
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* Returns a hashcode value for this CRL from its
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* encoded form.
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*
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* @return the hashcode value.
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*/
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public int hashCode() {
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int retval = 0;
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try {
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byte[] crlData = X509CRLImpl.getEncodedInternal(this);
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for (int i = 1; i < crlData.length; i++) {
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retval += crlData[i] * i;
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}
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return retval;
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} catch (CRLException e) {
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return retval;
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}
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}
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/**
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* Returns the ASN.1 DER-encoded form of this CRL.
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*
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* @return the encoded form of this certificate
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* @exception CRLException if an encoding error occurs.
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*/
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public abstract byte[] getEncoded()
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throws CRLException;
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/**
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* Verifies that this CRL was signed using the
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* private key that corresponds to the given public key.
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*
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* @param key the PublicKey used to carry out the verification.
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*
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* @exception NoSuchAlgorithmException on unsupported signature
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* algorithms.
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* @exception InvalidKeyException on incorrect key.
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* @exception NoSuchProviderException if there's no default provider.
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* @exception SignatureException on signature errors.
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* @exception CRLException on encoding errors.
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*/
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public abstract void verify(PublicKey key)
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throws CRLException, NoSuchAlgorithmException,
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InvalidKeyException, NoSuchProviderException,
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SignatureException;
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/**
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* Verifies that this CRL was signed using the
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* private key that corresponds to the given public key.
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* This method uses the signature verification engine
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* supplied by the given provider.
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*
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* @param key the PublicKey used to carry out the verification.
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* @param sigProvider the name of the signature provider.
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*
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* @exception NoSuchAlgorithmException on unsupported signature
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* algorithms.
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* @exception InvalidKeyException on incorrect key.
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* @exception NoSuchProviderException on incorrect provider.
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* @exception SignatureException on signature errors.
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* @exception CRLException on encoding errors.
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*/
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public abstract void verify(PublicKey key, String sigProvider)
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throws CRLException, NoSuchAlgorithmException,
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InvalidKeyException, NoSuchProviderException,
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SignatureException;
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/**
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* Gets the <code>version</code> (version number) value from the CRL.
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* The ASN.1 definition for this is:
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* <pre>
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* version Version OPTIONAL,
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* -- if present, must be v2<p>
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* Version ::= INTEGER { v1(0), v2(1), v3(2) }
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* -- v3 does not apply to CRLs but appears for consistency
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* -- with definition of Version for certs
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* </pre>
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*
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* @return the version number, i.e. 1 or 2.
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*/
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public abstract int getVersion();
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/**
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* <strong>Denigrated</strong>, replaced by {@linkplain
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* #getIssuerX500Principal()}. This method returns the <code>issuer</code>
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* as an implementation specific Principal object, which should not be
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* relied upon by portable code.
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*
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* <p>
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* Gets the <code>issuer</code> (issuer distinguished name) value from
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* the CRL. The issuer name identifies the entity that signed (and
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* issued) the CRL.
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*
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* <p>The issuer name field contains an
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* X.500 distinguished name (DN).
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* The ASN.1 definition for this is:
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* <pre>
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* issuer Name
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*
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* Name ::= CHOICE { RDNSequence }
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* RDNSequence ::= SEQUENCE OF RelativeDistinguishedName
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* RelativeDistinguishedName ::=
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* SET OF AttributeValueAssertion
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*
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* AttributeValueAssertion ::= SEQUENCE {
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* AttributeType,
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* AttributeValue }
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* AttributeType ::= OBJECT IDENTIFIER
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* AttributeValue ::= ANY
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* </pre>
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* The <code>Name</code> describes a hierarchical name composed of
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* attributes,
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* such as country name, and corresponding values, such as US.
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* The type of the <code>AttributeValue</code> component is determined by
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* the <code>AttributeType</code>; in general it will be a
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* <code>directoryString</code>. A <code>directoryString</code> is usually
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* one of <code>PrintableString</code>,
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* <code>TeletexString</code> or <code>UniversalString</code>.
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*
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* @return a Principal whose name is the issuer distinguished name.
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*/
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public abstract Principal getIssuerDN();
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/**
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* Returns the issuer (issuer distinguished name) value from the
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* CRL as an <code>X500Principal</code>.
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* <p>
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* It is recommended that subclasses override this method.
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*
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* @return an <code>X500Principal</code> representing the issuer
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* distinguished name
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* @since 1.4
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*/
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public X500Principal getIssuerX500Principal() {
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if (issuerPrincipal == null) {
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issuerPrincipal = X509CRLImpl.getIssuerX500Principal(this);
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}
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return issuerPrincipal;
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}
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/**
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* Gets the <code>thisUpdate</code> date from the CRL.
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* The ASN.1 definition for this is:
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* <pre>
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* thisUpdate ChoiceOfTime
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* ChoiceOfTime ::= CHOICE {
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* utcTime UTCTime,
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* generalTime GeneralizedTime }
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* </pre>
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*
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* @return the <code>thisUpdate</code> date from the CRL.
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*/
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public abstract Date getThisUpdate();
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/**
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* Gets the <code>nextUpdate</code> date from the CRL.
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*
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* @return the <code>nextUpdate</code> date from the CRL, or null if
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* not present.
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*/
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public abstract Date getNextUpdate();
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/**
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* Gets the CRL entry, if any, with the given certificate serialNumber.
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*
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* @param serialNumber the serial number of the certificate for which a CRL entry
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* is to be looked up
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* @return the entry with the given serial number, or null if no such entry
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* exists in this CRL.
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* @see X509CRLEntry
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*/
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public abstract X509CRLEntry
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getRevokedCertificate(BigInteger serialNumber);
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/**
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* Get the CRL entry, if any, for the given certificate.
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*
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* <p>This method can be used to lookup CRL entries in indirect CRLs,
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* that means CRLs that contain entries from issuers other than the CRL
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* issuer. The default implementation will only return entries for
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* certificates issued by the CRL issuer. Subclasses that wish to
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* support indirect CRLs should override this method.
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*
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* @param certificate the certificate for which a CRL entry is to be looked
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* up
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* @return the entry for the given certificate, or null if no such entry
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* exists in this CRL.
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* @exception NullPointerException if certificate is null
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*
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* @since 1.5
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*/
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public X509CRLEntry getRevokedCertificate(X509Certificate certificate) {
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X500Principal certIssuer = certificate.getIssuerX500Principal();
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X500Principal crlIssuer = getIssuerX500Principal();
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if (certIssuer.equals(crlIssuer) == false) {
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return null;
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}
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return getRevokedCertificate(certificate.getSerialNumber());
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}
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/**
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* Gets all the entries from this CRL.
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* This returns a Set of X509CRLEntry objects.
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*
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* @return all the entries or null if there are none present.
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* @see X509CRLEntry
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*/
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public abstract Set<? extends X509CRLEntry> getRevokedCertificates();
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/**
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* Gets the DER-encoded CRL information, the
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* <code>tbsCertList</code> from this CRL.
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* This can be used to verify the signature independently.
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*
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* @return the DER-encoded CRL information.
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* @exception CRLException if an encoding error occurs.
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*/
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public abstract byte[] getTBSCertList() throws CRLException;
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/**
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* Gets the <code>signature</code> value (the raw signature bits) from
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* the CRL.
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* The ASN.1 definition for this is:
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* <pre>
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* signature BIT STRING
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* </pre>
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*
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* @return the signature.
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*/
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public abstract byte[] getSignature();
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/**
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* Gets the signature algorithm name for the CRL
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* signature algorithm. An example is the string "SHA-1/DSA".
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* The ASN.1 definition for this is:
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* <pre>
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* signatureAlgorithm AlgorithmIdentifier<p>
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* AlgorithmIdentifier ::= SEQUENCE {
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* algorithm OBJECT IDENTIFIER,
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* parameters ANY DEFINED BY algorithm OPTIONAL }
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* -- contains a value of the type
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* -- registered for use with the
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* -- algorithm object identifier value
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* </pre>
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*
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* <p>The algorithm name is determined from the <code>algorithm</code>
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* OID string.
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*
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* @return the signature algorithm name.
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*/
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public abstract String getSigAlgName();
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/**
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* Gets the signature algorithm OID string from the CRL.
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* An OID is represented by a set of nonnegative whole numbers separated
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* by periods.
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* For example, the string "1.2.840.10040.4.3" identifies the SHA-1
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414 |
* with DSA signature algorithm defined in
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415 |
* <a href="http://www.ietf.org/rfc/rfc3279.txt">RFC 3279: Algorithms and
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|
416 |
* Identifiers for the Internet X.509 Public Key Infrastructure Certificate
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|
417 |
* and CRL Profile</a>.
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|
418 |
*
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|
419 |
* <p>See {@link #getSigAlgName() getSigAlgName} for
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|
420 |
* relevant ASN.1 definitions.
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|
421 |
*
|
|
422 |
* @return the signature algorithm OID string.
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|
423 |
*/
|
|
424 |
public abstract String getSigAlgOID();
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|
425 |
|
|
426 |
/**
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|
427 |
* Gets the DER-encoded signature algorithm parameters from this
|
|
428 |
* CRL's signature algorithm. In most cases, the signature
|
|
429 |
* algorithm parameters are null; the parameters are usually
|
|
430 |
* supplied with the public key.
|
|
431 |
* If access to individual parameter values is needed then use
|
|
432 |
* {@link java.security.AlgorithmParameters AlgorithmParameters}
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|
433 |
* and instantiate with the name returned by
|
|
434 |
* {@link #getSigAlgName() getSigAlgName}.
|
|
435 |
*
|
|
436 |
* <p>See {@link #getSigAlgName() getSigAlgName} for
|
|
437 |
* relevant ASN.1 definitions.
|
|
438 |
*
|
|
439 |
* @return the DER-encoded signature algorithm parameters, or
|
|
440 |
* null if no parameters are present.
|
|
441 |
*/
|
|
442 |
public abstract byte[] getSigAlgParams();
|
|
443 |
}
|