| /* |
| * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.security.cert; |
| |
| import java.math.BigInteger; |
| import java.security.Principal; |
| import java.security.PublicKey; |
| import java.util.Collection; |
| import java.util.Date; |
| import java.util.List; |
| import javax.security.auth.x500.X500Principal; |
| |
| import sun.security.x509.X509CertImpl; |
| |
| /** |
| * <p> |
| * Abstract class for X.509 certificates. This provides a standard |
| * way to access all the attributes of an X.509 certificate. |
| * <p> |
| * In June of 1996, the basic X.509 v3 format was completed by |
| * ISO/IEC and ANSI X9, which is described below in ASN.1: |
| * <pre> |
| * Certificate ::= SEQUENCE { |
| * tbsCertificate TBSCertificate, |
| * signatureAlgorithm AlgorithmIdentifier, |
| * signature BIT STRING } |
| * </pre> |
| * <p> |
| * These certificates are widely used to support authentication and |
| * other functionality in Internet security systems. Common applications |
| * include Privacy Enhanced Mail (PEM), Transport Layer Security (SSL), |
| * code signing for trusted software distribution, and Secure Electronic |
| * Transactions (SET). |
| * <p> |
| * These certificates are managed and vouched for by <em>Certificate |
| * Authorities</em> (CAs). CAs are services which create certificates by |
| * placing data in the X.509 standard format and then digitally signing |
| * that data. CAs act as trusted third parties, making introductions |
| * between principals who have no direct knowledge of each other. |
| * CA certificates are either signed by themselves, or by some other |
| * CA such as a "root" CA. |
| * <p> |
| * More information can be found in |
| * <a href="http://www.ietf.org/rfc/rfc3280.txt">RFC 3280: Internet X.509 |
| * Public Key Infrastructure Certificate and CRL Profile</a>. |
| * <p> |
| * The ASN.1 definition of <code>tbsCertificate</code> is: |
| * <pre> |
| * TBSCertificate ::= SEQUENCE { |
| * version [0] EXPLICIT Version DEFAULT v1, |
| * serialNumber CertificateSerialNumber, |
| * signature AlgorithmIdentifier, |
| * issuer Name, |
| * validity Validity, |
| * subject Name, |
| * subjectPublicKeyInfo SubjectPublicKeyInfo, |
| * issuerUniqueID [1] IMPLICIT UniqueIdentifier OPTIONAL, |
| * -- If present, version must be v2 or v3 |
| * subjectUniqueID [2] IMPLICIT UniqueIdentifier OPTIONAL, |
| * -- If present, version must be v2 or v3 |
| * extensions [3] EXPLICIT Extensions OPTIONAL |
| * -- If present, version must be v3 |
| * } |
| * </pre> |
| * <p> |
| * Certificates are instantiated using a certificate factory. The following is |
| * an example of how to instantiate an X.509 certificate: |
| * <pre> |
| * InputStream inStream = null; |
| * try { |
| * inStream = new FileInputStream("fileName-of-cert"); |
| * CertificateFactory cf = CertificateFactory.getInstance("X.509"); |
| * X509Certificate cert = (X509Certificate)cf.generateCertificate(inStream); |
| * } finally { |
| * if (inStream != null) { |
| * inStream.close(); |
| * } |
| * } |
| * </pre> |
| * |
| * @author Hemma Prafullchandra |
| * |
| * |
| * @see Certificate |
| * @see CertificateFactory |
| * @see X509Extension |
| */ |
| |
| public abstract class X509Certificate extends Certificate |
| implements X509Extension { |
| |
| private static final long serialVersionUID = -2491127588187038216L; |
| |
| private transient X500Principal subjectX500Principal, issuerX500Principal; |
| |
| /** |
| * Constructor for X.509 certificates. |
| */ |
| protected X509Certificate() { |
| super("X.509"); |
| } |
| |
| /** |
| * Checks that the certificate is currently valid. It is if |
| * the current date and time are within the validity period given in the |
| * certificate. |
| * <p> |
| * The validity period consists of two date/time values: |
| * the first and last dates (and times) on which the certificate |
| * is valid. It is defined in |
| * ASN.1 as: |
| * <pre> |
| * validity Validity<p> |
| * Validity ::= SEQUENCE { |
| * notBefore CertificateValidityDate, |
| * notAfter CertificateValidityDate }<p> |
| * CertificateValidityDate ::= CHOICE { |
| * utcTime UTCTime, |
| * generalTime GeneralizedTime } |
| * </pre> |
| * |
| * @exception CertificateExpiredException if the certificate has expired. |
| * @exception CertificateNotYetValidException if the certificate is not |
| * yet valid. |
| */ |
| public abstract void checkValidity() |
| throws CertificateExpiredException, CertificateNotYetValidException; |
| |
| /** |
| * Checks that the given date is within the certificate's |
| * validity period. In other words, this determines whether the |
| * certificate would be valid at the given date/time. |
| * |
| * @param date the Date to check against to see if this certificate |
| * is valid at that date/time. |
| * |
| * @exception CertificateExpiredException if the certificate has expired |
| * with respect to the <code>date</code> supplied. |
| * @exception CertificateNotYetValidException if the certificate is not |
| * yet valid with respect to the <code>date</code> supplied. |
| * |
| * @see #checkValidity() |
| */ |
| public abstract void checkValidity(Date date) |
| throws CertificateExpiredException, CertificateNotYetValidException; |
| |
| /** |
| * Gets the <code>version</code> (version number) value from the |
| * certificate. |
| * The ASN.1 definition for this is: |
| * <pre> |
| * version [0] EXPLICIT Version DEFAULT v1<p> |
| * Version ::= INTEGER { v1(0), v2(1), v3(2) } |
| * </pre> |
| * @return the version number, i.e. 1, 2 or 3. |
| */ |
| public abstract int getVersion(); |
| |
| /** |
| * Gets the <code>serialNumber</code> value from the certificate. |
| * The serial number is an integer assigned by the certification |
| * authority to each certificate. It must be unique for each |
| * certificate issued by a given CA (i.e., the issuer name and |
| * serial number identify a unique certificate). |
| * The ASN.1 definition for this is: |
| * <pre> |
| * serialNumber CertificateSerialNumber<p> |
| * |
| * CertificateSerialNumber ::= INTEGER |
| * </pre> |
| * |
| * @return the serial number. |
| */ |
| public abstract BigInteger getSerialNumber(); |
| |
| /** |
| * <strong>Denigrated</strong>, replaced by {@linkplain |
| * #getIssuerX500Principal()}. This method returns the <code>issuer</code> |
| * as an implementation specific Principal object, which should not be |
| * relied upon by portable code. |
| * |
| * <p> |
| * Gets the <code>issuer</code> (issuer distinguished name) value from |
| * the certificate. The issuer name identifies the entity that signed (and |
| * issued) the certificate. |
| * |
| * <p>The issuer name field contains an |
| * X.500 distinguished name (DN). |
| * The ASN.1 definition for this is: |
| * <pre> |
| * issuer Name<p> |
| * |
| * Name ::= CHOICE { RDNSequence } |
| * RDNSequence ::= SEQUENCE OF RelativeDistinguishedName |
| * RelativeDistinguishedName ::= |
| * SET OF AttributeValueAssertion |
| * |
| * AttributeValueAssertion ::= SEQUENCE { |
| * AttributeType, |
| * AttributeValue } |
| * AttributeType ::= OBJECT IDENTIFIER |
| * AttributeValue ::= ANY |
| * </pre> |
| * The <code>Name</code> describes a hierarchical name composed of |
| * attributes, |
| * such as country name, and corresponding values, such as US. |
| * The type of the <code>AttributeValue</code> component is determined by |
| * the <code>AttributeType</code>; in general it will be a |
| * <code>directoryString</code>. A <code>directoryString</code> is usually |
| * one of <code>PrintableString</code>, |
| * <code>TeletexString</code> or <code>UniversalString</code>. |
| * |
| * @return a Principal whose name is the issuer distinguished name. |
| */ |
| public abstract Principal getIssuerDN(); |
| |
| /** |
| * Returns the issuer (issuer distinguished name) value from the |
| * certificate as an <code>X500Principal</code>. |
| * <p> |
| * It is recommended that subclasses override this method. |
| * |
| * @return an <code>X500Principal</code> representing the issuer |
| * distinguished name |
| * @since 1.4 |
| */ |
| public X500Principal getIssuerX500Principal() { |
| if (issuerX500Principal == null) { |
| issuerX500Principal = X509CertImpl.getIssuerX500Principal(this); |
| } |
| return issuerX500Principal; |
| } |
| |
| /** |
| * <strong>Denigrated</strong>, replaced by {@linkplain |
| * #getSubjectX500Principal()}. This method returns the <code>subject</code> |
| * as an implementation specific Principal object, which should not be |
| * relied upon by portable code. |
| * |
| * <p> |
| * Gets the <code>subject</code> (subject distinguished name) value |
| * from the certificate. If the <code>subject</code> value is empty, |
| * then the <code>getName()</code> method of the returned |
| * <code>Principal</code> object returns an empty string (""). |
| * |
| * <p> The ASN.1 definition for this is: |
| * <pre> |
| * subject Name |
| * </pre> |
| * |
| * <p>See {@link #getIssuerDN() getIssuerDN} for <code>Name</code> |
| * and other relevant definitions. |
| * |
| * @return a Principal whose name is the subject name. |
| */ |
| public abstract Principal getSubjectDN(); |
| |
| /** |
| * Returns the subject (subject distinguished name) value from the |
| * certificate as an <code>X500Principal</code>. If the subject value |
| * is empty, then the <code>getName()</code> method of the returned |
| * <code>X500Principal</code> object returns an empty string (""). |
| * <p> |
| * It is recommended that subclasses override this method. |
| * |
| * @return an <code>X500Principal</code> representing the subject |
| * distinguished name |
| * @since 1.4 |
| */ |
| public X500Principal getSubjectX500Principal() { |
| if (subjectX500Principal == null) { |
| subjectX500Principal = X509CertImpl.getSubjectX500Principal(this); |
| } |
| return subjectX500Principal; |
| } |
| |
| /** |
| * Gets the <code>notBefore</code> date from the validity period of |
| * the certificate. |
| * The relevant ASN.1 definitions are: |
| * <pre> |
| * validity Validity<p> |
| * |
| * Validity ::= SEQUENCE { |
| * notBefore CertificateValidityDate, |
| * notAfter CertificateValidityDate }<p> |
| * CertificateValidityDate ::= CHOICE { |
| * utcTime UTCTime, |
| * generalTime GeneralizedTime } |
| * </pre> |
| * |
| * @return the start date of the validity period. |
| * @see #checkValidity |
| */ |
| public abstract Date getNotBefore(); |
| |
| /** |
| * Gets the <code>notAfter</code> date from the validity period of |
| * the certificate. See {@link #getNotBefore() getNotBefore} |
| * for relevant ASN.1 definitions. |
| * |
| * @return the end date of the validity period. |
| * @see #checkValidity |
| */ |
| public abstract Date getNotAfter(); |
| |
| /** |
| * Gets the DER-encoded certificate information, the |
| * <code>tbsCertificate</code> from this certificate. |
| * This can be used to verify the signature independently. |
| * |
| * @return the DER-encoded certificate information. |
| * @exception CertificateEncodingException if an encoding error occurs. |
| */ |
| public abstract byte[] getTBSCertificate() |
| throws CertificateEncodingException; |
| |
| /** |
| * Gets the <code>signature</code> value (the raw signature bits) from |
| * the certificate. |
| * The ASN.1 definition for this is: |
| * <pre> |
| * signature BIT STRING |
| * </pre> |
| * |
| * @return the signature. |
| */ |
| public abstract byte[] getSignature(); |
| |
| /** |
| * Gets the signature algorithm name for the certificate |
| * signature algorithm. An example is the string "SHA-1/DSA". |
| * The ASN.1 definition for this is: |
| * <pre> |
| * signatureAlgorithm AlgorithmIdentifier<p> |
| * AlgorithmIdentifier ::= SEQUENCE { |
| * algorithm OBJECT IDENTIFIER, |
| * parameters ANY DEFINED BY algorithm OPTIONAL } |
| * -- contains a value of the type |
| * -- registered for use with the |
| * -- algorithm object identifier value |
| * </pre> |
| * |
| * <p>The algorithm name is determined from the <code>algorithm</code> |
| * OID string. |
| * |
| * @return the signature algorithm name. |
| */ |
| public abstract String getSigAlgName(); |
| |
| /** |
| * Gets the signature algorithm OID string from the certificate. |
| * An OID is represented by a set of nonnegative whole numbers separated |
| * by periods. |
| * For example, the string "1.2.840.10040.4.3" identifies the SHA-1 |
| * with DSA signature algorithm defined in |
| * <a href="http://www.ietf.org/rfc/rfc3279.txt">RFC 3279: Algorithms and |
| * Identifiers for the Internet X.509 Public Key Infrastructure Certificate |
| * and CRL Profile</a>. |
| * |
| * <p>See {@link #getSigAlgName() getSigAlgName} for |
| * relevant ASN.1 definitions. |
| * |
| * @return the signature algorithm OID string. |
| */ |
| public abstract String getSigAlgOID(); |
| |
| /** |
| * Gets the DER-encoded signature algorithm parameters from this |
| * certificate's signature algorithm. In most cases, the signature |
| * algorithm parameters are null; the parameters are usually |
| * supplied with the certificate's public key. |
| * If access to individual parameter values is needed then use |
| * {@link java.security.AlgorithmParameters AlgorithmParameters} |
| * and instantiate with the name returned by |
| * {@link #getSigAlgName() getSigAlgName}. |
| * |
| * <p>See {@link #getSigAlgName() getSigAlgName} for |
| * relevant ASN.1 definitions. |
| * |
| * @return the DER-encoded signature algorithm parameters, or |
| * null if no parameters are present. |
| */ |
| public abstract byte[] getSigAlgParams(); |
| |
| /** |
| * Gets the <code>issuerUniqueID</code> value from the certificate. |
| * The issuer unique identifier is present in the certificate |
| * to handle the possibility of reuse of issuer names over time. |
| * RFC 3280 recommends that names not be reused and that |
| * conforming certificates not make use of unique identifiers. |
| * Applications conforming to that profile should be capable of |
| * parsing unique identifiers and making comparisons. |
| * |
| * <p>The ASN.1 definition for this is: |
| * <pre> |
| * issuerUniqueID [1] IMPLICIT UniqueIdentifier OPTIONAL<p> |
| * UniqueIdentifier ::= BIT STRING |
| * </pre> |
| * |
| * @return the issuer unique identifier or null if it is not |
| * present in the certificate. |
| */ |
| public abstract boolean[] getIssuerUniqueID(); |
| |
| /** |
| * Gets the <code>subjectUniqueID</code> value from the certificate. |
| * |
| * <p>The ASN.1 definition for this is: |
| * <pre> |
| * subjectUniqueID [2] IMPLICIT UniqueIdentifier OPTIONAL<p> |
| * UniqueIdentifier ::= BIT STRING |
| * </pre> |
| * |
| * @return the subject unique identifier or null if it is not |
| * present in the certificate. |
| */ |
| public abstract boolean[] getSubjectUniqueID(); |
| |
| /** |
| * Gets a boolean array representing bits of |
| * the <code>KeyUsage</code> extension, (OID = 2.5.29.15). |
| * The key usage extension defines the purpose (e.g., encipherment, |
| * signature, certificate signing) of the key contained in the |
| * certificate. |
| * The ASN.1 definition for this is: |
| * <pre> |
| * KeyUsage ::= BIT STRING { |
| * digitalSignature (0), |
| * nonRepudiation (1), |
| * keyEncipherment (2), |
| * dataEncipherment (3), |
| * keyAgreement (4), |
| * keyCertSign (5), |
| * cRLSign (6), |
| * encipherOnly (7), |
| * decipherOnly (8) } |
| * </pre> |
| * RFC 3280 recommends that when used, this be marked |
| * as a critical extension. |
| * |
| * @return the KeyUsage extension of this certificate, represented as |
| * an array of booleans. The order of KeyUsage values in the array is |
| * the same as in the above ASN.1 definition. The array will contain a |
| * value for each KeyUsage defined above. If the KeyUsage list encoded |
| * in the certificate is longer than the above list, it will not be |
| * truncated. Returns null if this certificate does not |
| * contain a KeyUsage extension. |
| */ |
| public abstract boolean[] getKeyUsage(); |
| |
| /** |
| * Gets an unmodifiable list of Strings representing the OBJECT |
| * IDENTIFIERs of the <code>ExtKeyUsageSyntax</code> field of the |
| * extended key usage extension, (OID = 2.5.29.37). It indicates |
| * one or more purposes for which the certified public key may be |
| * used, in addition to or in place of the basic purposes |
| * indicated in the key usage extension field. The ASN.1 |
| * definition for this is: |
| * <pre> |
| * ExtKeyUsageSyntax ::= SEQUENCE SIZE (1..MAX) OF KeyPurposeId<p> |
| * |
| * KeyPurposeId ::= OBJECT IDENTIFIER<p> |
| * </pre> |
| * |
| * Key purposes may be defined by any organization with a |
| * need. Object identifiers used to identify key purposes shall be |
| * assigned in accordance with IANA or ITU-T Rec. X.660 | |
| * ISO/IEC/ITU 9834-1. |
| * <p> |
| * This method was added to version 1.4 of the Java 2 Platform Standard |
| * Edition. In order to maintain backwards compatibility with existing |
| * service providers, this method is not <code>abstract</code> |
| * and it provides a default implementation. Subclasses |
| * should override this method with a correct implementation. |
| * |
| * @return the ExtendedKeyUsage extension of this certificate, |
| * as an unmodifiable list of object identifiers represented |
| * as Strings. Returns null if this certificate does not |
| * contain an ExtendedKeyUsage extension. |
| * @throws CertificateParsingException if the extension cannot be decoded |
| * @since 1.4 |
| */ |
| public List<String> getExtendedKeyUsage() throws CertificateParsingException { |
| return X509CertImpl.getExtendedKeyUsage(this); |
| } |
| |
| /** |
| * Gets the certificate constraints path length from the |
| * critical <code>BasicConstraints</code> extension, (OID = 2.5.29.19). |
| * <p> |
| * The basic constraints extension identifies whether the subject |
| * of the certificate is a Certificate Authority (CA) and |
| * how deep a certification path may exist through that CA. The |
| * <code>pathLenConstraint</code> field (see below) is meaningful |
| * only if <code>cA</code> is set to TRUE. In this case, it gives the |
| * maximum number of CA certificates that may follow this certificate in a |
| * certification path. A value of zero indicates that only an end-entity |
| * certificate may follow in the path. |
| * <p> |
| * The ASN.1 definition for this is: |
| * <pre> |
| * BasicConstraints ::= SEQUENCE { |
| * cA BOOLEAN DEFAULT FALSE, |
| * pathLenConstraint INTEGER (0..MAX) OPTIONAL } |
| * </pre> |
| * |
| * @return the value of <code>pathLenConstraint</code> if the |
| * BasicConstraints extension is present in the certificate and the |
| * subject of the certificate is a CA, otherwise -1. |
| * If the subject of the certificate is a CA and |
| * <code>pathLenConstraint</code> does not appear, |
| * <code>Integer.MAX_VALUE</code> is returned to indicate that there is no |
| * limit to the allowed length of the certification path. |
| */ |
| public abstract int getBasicConstraints(); |
| |
| /** |
| * Gets an immutable collection of subject alternative names from the |
| * <code>SubjectAltName</code> extension, (OID = 2.5.29.17). |
| * <p> |
| * The ASN.1 definition of the <code>SubjectAltName</code> extension is: |
| * <pre> |
| * SubjectAltName ::= GeneralNames |
| * |
| * GeneralNames :: = SEQUENCE SIZE (1..MAX) OF GeneralName |
| * |
| * GeneralName ::= CHOICE { |
| * otherName [0] OtherName, |
| * rfc822Name [1] IA5String, |
| * dNSName [2] IA5String, |
| * x400Address [3] ORAddress, |
| * directoryName [4] Name, |
| * ediPartyName [5] EDIPartyName, |
| * uniformResourceIdentifier [6] IA5String, |
| * iPAddress [7] OCTET STRING, |
| * registeredID [8] OBJECT IDENTIFIER} |
| * </pre> |
| * <p> |
| * If this certificate does not contain a <code>SubjectAltName</code> |
| * extension, <code>null</code> is returned. Otherwise, a |
| * <code>Collection</code> is returned with an entry representing each |
| * <code>GeneralName</code> included in the extension. Each entry is a |
| * <code>List</code> whose first entry is an <code>Integer</code> |
| * (the name type, 0-8) and whose second entry is a <code>String</code> |
| * or a byte array (the name, in string or ASN.1 DER encoded form, |
| * respectively). |
| * <p> |
| * <a href="http://www.ietf.org/rfc/rfc822.txt">RFC 822</a>, DNS, and URI |
| * names are returned as <code>String</code>s, |
| * using the well-established string formats for those types (subject to |
| * the restrictions included in RFC 3280). IPv4 address names are |
| * returned using dotted quad notation. IPv6 address names are returned |
| * in the form "a1:a2:...:a8", where a1-a8 are hexadecimal values |
| * representing the eight 16-bit pieces of the address. OID names are |
| * returned as <code>String</code>s represented as a series of nonnegative |
| * integers separated by periods. And directory names (distinguished names) |
| * are returned in <a href="http://www.ietf.org/rfc/rfc2253.txt"> |
| * RFC 2253</a> string format. No standard string format is |
| * defined for otherNames, X.400 names, EDI party names, or any |
| * other type of names. They are returned as byte arrays |
| * containing the ASN.1 DER encoded form of the name. |
| * <p> |
| * Note that the <code>Collection</code> returned may contain more |
| * than one name of the same type. Also, note that the returned |
| * <code>Collection</code> is immutable and any entries containing byte |
| * arrays are cloned to protect against subsequent modifications. |
| * <p> |
| * This method was added to version 1.4 of the Java 2 Platform Standard |
| * Edition. In order to maintain backwards compatibility with existing |
| * service providers, this method is not <code>abstract</code> |
| * and it provides a default implementation. Subclasses |
| * should override this method with a correct implementation. |
| * |
| * @return an immutable <code>Collection</code> of subject alternative |
| * names (or <code>null</code>) |
| * @throws CertificateParsingException if the extension cannot be decoded |
| * @since 1.4 |
| */ |
| public Collection<List<?>> getSubjectAlternativeNames() |
| throws CertificateParsingException { |
| return X509CertImpl.getSubjectAlternativeNames(this); |
| } |
| |
| /** |
| * Gets an immutable collection of issuer alternative names from the |
| * <code>IssuerAltName</code> extension, (OID = 2.5.29.18). |
| * <p> |
| * The ASN.1 definition of the <code>IssuerAltName</code> extension is: |
| * <pre> |
| * IssuerAltName ::= GeneralNames |
| * </pre> |
| * The ASN.1 definition of <code>GeneralNames</code> is defined |
| * in {@link #getSubjectAlternativeNames getSubjectAlternativeNames}. |
| * <p> |
| * If this certificate does not contain an <code>IssuerAltName</code> |
| * extension, <code>null</code> is returned. Otherwise, a |
| * <code>Collection</code> is returned with an entry representing each |
| * <code>GeneralName</code> included in the extension. Each entry is a |
| * <code>List</code> whose first entry is an <code>Integer</code> |
| * (the name type, 0-8) and whose second entry is a <code>String</code> |
| * or a byte array (the name, in string or ASN.1 DER encoded form, |
| * respectively). For more details about the formats used for each |
| * name type, see the <code>getSubjectAlternativeNames</code> method. |
| * <p> |
| * Note that the <code>Collection</code> returned may contain more |
| * than one name of the same type. Also, note that the returned |
| * <code>Collection</code> is immutable and any entries containing byte |
| * arrays are cloned to protect against subsequent modifications. |
| * <p> |
| * This method was added to version 1.4 of the Java 2 Platform Standard |
| * Edition. In order to maintain backwards compatibility with existing |
| * service providers, this method is not <code>abstract</code> |
| * and it provides a default implementation. Subclasses |
| * should override this method with a correct implementation. |
| * |
| * @return an immutable <code>Collection</code> of issuer alternative |
| * names (or <code>null</code>) |
| * @throws CertificateParsingException if the extension cannot be decoded |
| * @since 1.4 |
| */ |
| public Collection<List<?>> getIssuerAlternativeNames() |
| throws CertificateParsingException { |
| return X509CertImpl.getIssuerAlternativeNames(this); |
| } |
| } |
