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/*
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* Copyright (c) 1997, 2006, Oracle and/or its affiliates. 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.security.cert;
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import java.math.BigInteger;
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import java.security.Principal;
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import java.security.PublicKey;
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import java.util.Collection;
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import java.util.Date;
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import java.util.List;
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import javax.security.auth.x500.X500Principal;
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import sun.security.x509.X509CertImpl;
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/**
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* <p>
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* Abstract class for X.509 certificates. This provides a standard
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* way to access all the attributes of an X.509 certificate.
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* <p>
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* In June of 1996, the basic X.509 v3 format was completed by
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* ISO/IEC and ANSI X9, which is described below in ASN.1:
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* <pre>
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* Certificate ::= SEQUENCE {
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* tbsCertificate TBSCertificate,
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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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* These certificates are widely used to support authentication and
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* other functionality in Internet security systems. Common applications
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* include Privacy Enhanced Mail (PEM), Transport Layer Security (SSL),
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* code signing for trusted software distribution, and Secure Electronic
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* Transactions (SET).
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* <p>
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* These certificates are managed and vouched for by <em>Certificate
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* Authorities</em> (CAs). CAs are services which create certificates by
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* placing data in the X.509 standard format and then digitally signing
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* that data. CAs act as trusted third parties, making introductions
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* between principals who have no direct knowledge of each other.
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* CA certificates are either signed by themselves, or by some other
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* CA such as a "root" CA.
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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>tbsCertificate</code> is:
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* <pre>
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* TBSCertificate ::= SEQUENCE {
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* version [0] EXPLICIT Version DEFAULT v1,
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* serialNumber CertificateSerialNumber,
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* signature AlgorithmIdentifier,
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* issuer Name,
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* validity Validity,
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* subject Name,
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* subjectPublicKeyInfo SubjectPublicKeyInfo,
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* issuerUniqueID [1] IMPLICIT UniqueIdentifier OPTIONAL,
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* -- If present, version must be v2 or v3
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* subjectUniqueID [2] IMPLICIT UniqueIdentifier OPTIONAL,
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* -- If present, version must be v2 or v3
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* extensions [3] EXPLICIT Extensions OPTIONAL
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* -- If present, version must be v3
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* }
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* </pre>
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* <p>
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* Certificates are instantiated using a certificate factory. The following is
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* an example of how to instantiate an X.509 certificate:
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* <pre>
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* InputStream inStream = null;
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* try {
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* inStream = new FileInputStream("fileName-of-cert");
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* CertificateFactory cf = CertificateFactory.getInstance("X.509");
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* X509Certificate cert = (X509Certificate)cf.generateCertificate(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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* </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 Certificate
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* @see CertificateFactory
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* @see X509Extension
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*/
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public abstract class X509Certificate extends Certificate
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implements X509Extension {
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private static final long serialVersionUID = -2491127588187038216L;
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private transient X500Principal subjectX500Principal, issuerX500Principal;
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/**
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* Constructor for X.509 certificates.
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*/
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protected X509Certificate() {
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super("X.509");
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}
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/**
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* Checks that the certificate is currently valid. It is if
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* the current date and time are within the validity period given in the
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* certificate.
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* <p>
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* The validity period consists of two date/time values:
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* the first and last dates (and times) on which the certificate
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* is valid. It is defined in
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* ASN.1 as:
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* <pre>
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* validity Validity<p>
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* Validity ::= SEQUENCE {
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* notBefore CertificateValidityDate,
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* notAfter CertificateValidityDate }<p>
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* CertificateValidityDate ::= 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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* @exception CertificateExpiredException if the certificate has expired.
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* @exception CertificateNotYetValidException if the certificate is not
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* yet valid.
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*/
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public abstract void checkValidity()
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throws CertificateExpiredException, CertificateNotYetValidException;
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/**
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* Checks that the given date is within the certificate's
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* validity period. In other words, this determines whether the
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* certificate would be valid at the given date/time.
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*
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* @param date the Date to check against to see if this certificate
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* is valid at that date/time.
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*
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* @exception CertificateExpiredException if the certificate has expired
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* with respect to the <code>date</code> supplied.
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* @exception CertificateNotYetValidException if the certificate is not
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* yet valid with respect to the <code>date</code> supplied.
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*
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* @see #checkValidity()
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*/
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public abstract void checkValidity(Date date)
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throws CertificateExpiredException, CertificateNotYetValidException;
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/**
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* Gets the <code>version</code> (version number) value from the
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* certificate.
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* The ASN.1 definition for this is:
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* <pre>
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* version [0] EXPLICIT Version DEFAULT v1<p>
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* Version ::= INTEGER { v1(0), v2(1), v3(2) }
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* </pre>
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* @return the version number, i.e. 1, 2 or 3.
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*/
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public abstract int getVersion();
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/**
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* Gets the <code>serialNumber</code> value from the certificate.
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* The serial number is an integer assigned by the certification
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* authority to each certificate. It must be unique for each
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* certificate issued by a given CA (i.e., the issuer name and
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* serial number identify a unique certificate).
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* The ASN.1 definition for this is:
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* <pre>
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* serialNumber CertificateSerialNumber<p>
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*
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* CertificateSerialNumber ::= INTEGER
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* </pre>
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*
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* @return the serial number.
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*/
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public abstract BigInteger getSerialNumber();
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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 certificate. The issuer name identifies the entity that signed (and
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* issued) the certificate.
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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<p>
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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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* certificate 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 (issuerX500Principal == null) {
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issuerX500Principal = X509CertImpl.getIssuerX500Principal(this);
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}
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return issuerX500Principal;
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}
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/**
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* <strong>Denigrated</strong>, replaced by {@linkplain
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* #getSubjectX500Principal()}. This method returns the <code>subject</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>subject</code> (subject distinguished name) value
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* from the certificate. If the <code>subject</code> value is empty,
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* then the <code>getName()</code> method of the returned
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* <code>Principal</code> object returns an empty string ("").
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*
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* <p> The ASN.1 definition for this is:
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* <pre>
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* subject Name
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* </pre>
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*
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* <p>See {@link #getIssuerDN() getIssuerDN} for <code>Name</code>
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* and other relevant definitions.
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*
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* @return a Principal whose name is the subject name.
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*/
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public abstract Principal getSubjectDN();
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/**
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* Returns the subject (subject distinguished name) value from the
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* certificate as an <code>X500Principal</code>. If the subject value
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* is empty, then the <code>getName()</code> method of the returned
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* <code>X500Principal</code> object returns an empty string ("").
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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 subject
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* distinguished name
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* @since 1.4
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*/
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public X500Principal getSubjectX500Principal() {
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if (subjectX500Principal == null) {
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subjectX500Principal = X509CertImpl.getSubjectX500Principal(this);
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}
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return subjectX500Principal;
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}
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/**
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* Gets the <code>notBefore</code> date from the validity period of
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* the certificate.
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* The relevant ASN.1 definitions are:
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* <pre>
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* validity Validity<p>
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*
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* Validity ::= SEQUENCE {
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* notBefore CertificateValidityDate,
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* notAfter CertificateValidityDate }<p>
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* CertificateValidityDate ::= 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 start date of the validity period.
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* @see #checkValidity
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*/
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public abstract Date getNotBefore();
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/**
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* Gets the <code>notAfter</code> date from the validity period of
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* the certificate. See {@link #getNotBefore() getNotBefore}
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* for relevant ASN.1 definitions.
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*
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* @return the end date of the validity period.
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* @see #checkValidity
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*/
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public abstract Date getNotAfter();
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/**
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* Gets the DER-encoded certificate information, the
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* <code>tbsCertificate</code> from this certificate.
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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 certificate information.
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* @exception CertificateEncodingException if an encoding error occurs.
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*/
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public abstract byte[] getTBSCertificate()
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throws CertificateEncodingException;
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/**
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* Gets the <code>signature</code> value (the raw signature bits) from
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* the certificate.
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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 certificate
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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 certificate.
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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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* with DSA signature algorithm defined in
|
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* <a href="http://www.ietf.org/rfc/rfc3279.txt">RFC 3279: Algorithms and
|
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* Identifiers for the Internet X.509 Public Key Infrastructure Certificate
|
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* and CRL Profile</a>.
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*
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* <p>See {@link #getSigAlgName() getSigAlgName} for
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* relevant ASN.1 definitions.
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*
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* @return the signature algorithm OID string.
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*/
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public abstract String getSigAlgOID();
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/**
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* Gets the DER-encoded signature algorithm parameters from this
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* certificate's signature algorithm. In most cases, the signature
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* algorithm parameters are null; the parameters are usually
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* supplied with the certificate's public key.
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* If access to individual parameter values is needed then use
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* {@link java.security.AlgorithmParameters AlgorithmParameters}
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* and instantiate with the name returned by
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* {@link #getSigAlgName() getSigAlgName}.
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*
|
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401 |
* <p>See {@link #getSigAlgName() getSigAlgName} for
|
|
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* relevant ASN.1 definitions.
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403 |
*
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* @return the DER-encoded signature algorithm parameters, or
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* null if no parameters are present.
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*/
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|
407 |
public abstract byte[] getSigAlgParams();
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/**
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|
410 |
* Gets the <code>issuerUniqueID</code> value from the certificate.
|
|
411 |
* The issuer unique identifier is present in the certificate
|
|
412 |
* to handle the possibility of reuse of issuer names over time.
|
|
413 |
* RFC 3280 recommends that names not be reused and that
|
|
414 |
* conforming certificates not make use of unique identifiers.
|
|
415 |
* Applications conforming to that profile should be capable of
|
|
416 |
* parsing unique identifiers and making comparisons.
|
|
417 |
*
|
|
418 |
* <p>The ASN.1 definition for this is:
|
|
419 |
* <pre>
|
|
420 |
* issuerUniqueID [1] IMPLICIT UniqueIdentifier OPTIONAL<p>
|
|
421 |
* UniqueIdentifier ::= BIT STRING
|
|
422 |
* </pre>
|
|
423 |
*
|
|
424 |
* @return the issuer unique identifier or null if it is not
|
|
425 |
* present in the certificate.
|
|
426 |
*/
|
|
427 |
public abstract boolean[] getIssuerUniqueID();
|
|
428 |
|
|
429 |
/**
|
|
430 |
* Gets the <code>subjectUniqueID</code> value from the certificate.
|
|
431 |
*
|
|
432 |
* <p>The ASN.1 definition for this is:
|
|
433 |
* <pre>
|
|
434 |
* subjectUniqueID [2] IMPLICIT UniqueIdentifier OPTIONAL<p>
|
|
435 |
* UniqueIdentifier ::= BIT STRING
|
|
436 |
* </pre>
|
|
437 |
*
|
|
438 |
* @return the subject unique identifier or null if it is not
|
|
439 |
* present in the certificate.
|
|
440 |
*/
|
|
441 |
public abstract boolean[] getSubjectUniqueID();
|
|
442 |
|
|
443 |
/**
|
|
444 |
* Gets a boolean array representing bits of
|
|
445 |
* the <code>KeyUsage</code> extension, (OID = 2.5.29.15).
|
|
446 |
* The key usage extension defines the purpose (e.g., encipherment,
|
|
447 |
* signature, certificate signing) of the key contained in the
|
|
448 |
* certificate.
|
|
449 |
* The ASN.1 definition for this is:
|
|
450 |
* <pre>
|
|
451 |
* KeyUsage ::= BIT STRING {
|
|
452 |
* digitalSignature (0),
|
|
453 |
* nonRepudiation (1),
|
|
454 |
* keyEncipherment (2),
|
|
455 |
* dataEncipherment (3),
|
|
456 |
* keyAgreement (4),
|
|
457 |
* keyCertSign (5),
|
|
458 |
* cRLSign (6),
|
|
459 |
* encipherOnly (7),
|
|
460 |
* decipherOnly (8) }
|
|
461 |
* </pre>
|
|
462 |
* RFC 3280 recommends that when used, this be marked
|
|
463 |
* as a critical extension.
|
|
464 |
*
|
|
465 |
* @return the KeyUsage extension of this certificate, represented as
|
|
466 |
* an array of booleans. The order of KeyUsage values in the array is
|
|
467 |
* the same as in the above ASN.1 definition. The array will contain a
|
|
468 |
* value for each KeyUsage defined above. If the KeyUsage list encoded
|
|
469 |
* in the certificate is longer than the above list, it will not be
|
|
470 |
* truncated. Returns null if this certificate does not
|
|
471 |
* contain a KeyUsage extension.
|
|
472 |
*/
|
|
473 |
public abstract boolean[] getKeyUsage();
|
|
474 |
|
|
475 |
/**
|
|
476 |
* Gets an unmodifiable list of Strings representing the OBJECT
|
|
477 |
* IDENTIFIERs of the <code>ExtKeyUsageSyntax</code> field of the
|
|
478 |
* extended key usage extension, (OID = 2.5.29.37). It indicates
|
|
479 |
* one or more purposes for which the certified public key may be
|
|
480 |
* used, in addition to or in place of the basic purposes
|
|
481 |
* indicated in the key usage extension field. The ASN.1
|
|
482 |
* definition for this is:
|
|
483 |
* <pre>
|
|
484 |
* ExtKeyUsageSyntax ::= SEQUENCE SIZE (1..MAX) OF KeyPurposeId<p>
|
|
485 |
*
|
|
486 |
* KeyPurposeId ::= OBJECT IDENTIFIER<p>
|
|
487 |
* </pre>
|
|
488 |
*
|
|
489 |
* Key purposes may be defined by any organization with a
|
|
490 |
* need. Object identifiers used to identify key purposes shall be
|
|
491 |
* assigned in accordance with IANA or ITU-T Rec. X.660 |
|
|
492 |
* ISO/IEC/ITU 9834-1.
|
|
493 |
* <p>
|
|
494 |
* This method was added to version 1.4 of the Java 2 Platform Standard
|
|
495 |
* Edition. In order to maintain backwards compatibility with existing
|
|
496 |
* service providers, this method is not <code>abstract</code>
|
|
497 |
* and it provides a default implementation. Subclasses
|
|
498 |
* should override this method with a correct implementation.
|
|
499 |
*
|
|
500 |
* @return the ExtendedKeyUsage extension of this certificate,
|
|
501 |
* as an unmodifiable list of object identifiers represented
|
|
502 |
* as Strings. Returns null if this certificate does not
|
|
503 |
* contain an ExtendedKeyUsage extension.
|
|
504 |
* @throws CertificateParsingException if the extension cannot be decoded
|
|
505 |
* @since 1.4
|
|
506 |
*/
|
|
507 |
public List<String> getExtendedKeyUsage() throws CertificateParsingException {
|
|
508 |
return X509CertImpl.getExtendedKeyUsage(this);
|
|
509 |
}
|
|
510 |
|
|
511 |
/**
|
|
512 |
* Gets the certificate constraints path length from the
|
|
513 |
* critical <code>BasicConstraints</code> extension, (OID = 2.5.29.19).
|
|
514 |
* <p>
|
|
515 |
* The basic constraints extension identifies whether the subject
|
|
516 |
* of the certificate is a Certificate Authority (CA) and
|
|
517 |
* how deep a certification path may exist through that CA. The
|
|
518 |
* <code>pathLenConstraint</code> field (see below) is meaningful
|
|
519 |
* only if <code>cA</code> is set to TRUE. In this case, it gives the
|
|
520 |
* maximum number of CA certificates that may follow this certificate in a
|
|
521 |
* certification path. A value of zero indicates that only an end-entity
|
|
522 |
* certificate may follow in the path.
|
|
523 |
* <p>
|
|
524 |
* The ASN.1 definition for this is:
|
|
525 |
* <pre>
|
|
526 |
* BasicConstraints ::= SEQUENCE {
|
|
527 |
* cA BOOLEAN DEFAULT FALSE,
|
|
528 |
* pathLenConstraint INTEGER (0..MAX) OPTIONAL }
|
|
529 |
* </pre>
|
|
530 |
*
|
|
531 |
* @return the value of <code>pathLenConstraint</code> if the
|
|
532 |
* BasicConstraints extension is present in the certificate and the
|
|
533 |
* subject of the certificate is a CA, otherwise -1.
|
|
534 |
* If the subject of the certificate is a CA and
|
|
535 |
* <code>pathLenConstraint</code> does not appear,
|
|
536 |
* <code>Integer.MAX_VALUE</code> is returned to indicate that there is no
|
|
537 |
* limit to the allowed length of the certification path.
|
|
538 |
*/
|
|
539 |
public abstract int getBasicConstraints();
|
|
540 |
|
|
541 |
/**
|
|
542 |
* Gets an immutable collection of subject alternative names from the
|
|
543 |
* <code>SubjectAltName</code> extension, (OID = 2.5.29.17).
|
|
544 |
* <p>
|
|
545 |
* The ASN.1 definition of the <code>SubjectAltName</code> extension is:
|
|
546 |
* <pre>
|
|
547 |
* SubjectAltName ::= GeneralNames
|
|
548 |
*
|
|
549 |
* GeneralNames :: = SEQUENCE SIZE (1..MAX) OF GeneralName
|
|
550 |
*
|
|
551 |
* GeneralName ::= CHOICE {
|
|
552 |
* otherName [0] OtherName,
|
|
553 |
* rfc822Name [1] IA5String,
|
|
554 |
* dNSName [2] IA5String,
|
|
555 |
* x400Address [3] ORAddress,
|
|
556 |
* directoryName [4] Name,
|
|
557 |
* ediPartyName [5] EDIPartyName,
|
|
558 |
* uniformResourceIdentifier [6] IA5String,
|
|
559 |
* iPAddress [7] OCTET STRING,
|
|
560 |
* registeredID [8] OBJECT IDENTIFIER}
|
|
561 |
* </pre>
|
|
562 |
* <p>
|
|
563 |
* If this certificate does not contain a <code>SubjectAltName</code>
|
|
564 |
* extension, <code>null</code> is returned. Otherwise, a
|
|
565 |
* <code>Collection</code> is returned with an entry representing each
|
|
566 |
* <code>GeneralName</code> included in the extension. Each entry is a
|
|
567 |
* <code>List</code> whose first entry is an <code>Integer</code>
|
|
568 |
* (the name type, 0-8) and whose second entry is a <code>String</code>
|
|
569 |
* or a byte array (the name, in string or ASN.1 DER encoded form,
|
|
570 |
* respectively).
|
|
571 |
* <p>
|
|
572 |
* <a href="http://www.ietf.org/rfc/rfc822.txt">RFC 822</a>, DNS, and URI
|
|
573 |
* names are returned as <code>String</code>s,
|
|
574 |
* using the well-established string formats for those types (subject to
|
|
575 |
* the restrictions included in RFC 3280). IPv4 address names are
|
|
576 |
* returned using dotted quad notation. IPv6 address names are returned
|
|
577 |
* in the form "a1:a2:...:a8", where a1-a8 are hexadecimal values
|
|
578 |
* representing the eight 16-bit pieces of the address. OID names are
|
|
579 |
* returned as <code>String</code>s represented as a series of nonnegative
|
|
580 |
* integers separated by periods. And directory names (distinguished names)
|
|
581 |
* are returned in <a href="http://www.ietf.org/rfc/rfc2253.txt">
|
|
582 |
* RFC 2253</a> string format. No standard string format is
|
|
583 |
* defined for otherNames, X.400 names, EDI party names, or any
|
|
584 |
* other type of names. They are returned as byte arrays
|
|
585 |
* containing the ASN.1 DER encoded form of the name.
|
|
586 |
* <p>
|
|
587 |
* Note that the <code>Collection</code> returned may contain more
|
|
588 |
* than one name of the same type. Also, note that the returned
|
|
589 |
* <code>Collection</code> is immutable and any entries containing byte
|
|
590 |
* arrays are cloned to protect against subsequent modifications.
|
|
591 |
* <p>
|
|
592 |
* This method was added to version 1.4 of the Java 2 Platform Standard
|
|
593 |
* Edition. In order to maintain backwards compatibility with existing
|
|
594 |
* service providers, this method is not <code>abstract</code>
|
|
595 |
* and it provides a default implementation. Subclasses
|
|
596 |
* should override this method with a correct implementation.
|
|
597 |
*
|
|
598 |
* @return an immutable <code>Collection</code> of subject alternative
|
|
599 |
* names (or <code>null</code>)
|
|
600 |
* @throws CertificateParsingException if the extension cannot be decoded
|
|
601 |
* @since 1.4
|
|
602 |
*/
|
|
603 |
public Collection<List<?>> getSubjectAlternativeNames()
|
|
604 |
throws CertificateParsingException {
|
|
605 |
return X509CertImpl.getSubjectAlternativeNames(this);
|
|
606 |
}
|
|
607 |
|
|
608 |
/**
|
|
609 |
* Gets an immutable collection of issuer alternative names from the
|
|
610 |
* <code>IssuerAltName</code> extension, (OID = 2.5.29.18).
|
|
611 |
* <p>
|
|
612 |
* The ASN.1 definition of the <code>IssuerAltName</code> extension is:
|
|
613 |
* <pre>
|
|
614 |
* IssuerAltName ::= GeneralNames
|
|
615 |
* </pre>
|
|
616 |
* The ASN.1 definition of <code>GeneralNames</code> is defined
|
|
617 |
* in {@link #getSubjectAlternativeNames getSubjectAlternativeNames}.
|
|
618 |
* <p>
|
|
619 |
* If this certificate does not contain an <code>IssuerAltName</code>
|
|
620 |
* extension, <code>null</code> is returned. Otherwise, a
|
|
621 |
* <code>Collection</code> is returned with an entry representing each
|
|
622 |
* <code>GeneralName</code> included in the extension. Each entry is a
|
|
623 |
* <code>List</code> whose first entry is an <code>Integer</code>
|
|
624 |
* (the name type, 0-8) and whose second entry is a <code>String</code>
|
|
625 |
* or a byte array (the name, in string or ASN.1 DER encoded form,
|
|
626 |
* respectively). For more details about the formats used for each
|
|
627 |
* name type, see the <code>getSubjectAlternativeNames</code> method.
|
|
628 |
* <p>
|
|
629 |
* Note that the <code>Collection</code> returned may contain more
|
|
630 |
* than one name of the same type. Also, note that the returned
|
|
631 |
* <code>Collection</code> is immutable and any entries containing byte
|
|
632 |
* arrays are cloned to protect against subsequent modifications.
|
|
633 |
* <p>
|
|
634 |
* This method was added to version 1.4 of the Java 2 Platform Standard
|
|
635 |
* Edition. In order to maintain backwards compatibility with existing
|
|
636 |
* service providers, this method is not <code>abstract</code>
|
|
637 |
* and it provides a default implementation. Subclasses
|
|
638 |
* should override this method with a correct implementation.
|
|
639 |
*
|
|
640 |
* @return an immutable <code>Collection</code> of issuer alternative
|
|
641 |
* names (or <code>null</code>)
|
|
642 |
* @throws CertificateParsingException if the extension cannot be decoded
|
|
643 |
* @since 1.4
|
|
644 |
*/
|
|
645 |
public Collection<List<?>> getIssuerAlternativeNames()
|
|
646 |
throws CertificateParsingException {
|
|
647 |
return X509CertImpl.getIssuerAlternativeNames(this);
|
|
648 |
}
|
|
649 |
}
|