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<HTML>
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<BODY>
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<HEAD>
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<TITLE>Certificate Attributes</TITLE>
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</HEAD>
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<h2><center>Certificate Attributes</center></h2>
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<font size=3><center>July 1998</font></center>
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<p>
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In JDK1.2 we provide an implementation of X.509 (version 3).
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The X509CertImpl class supports the following methods to
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manipulate the various attributes of a certificate:
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<pre>
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Object get(String name)
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void set(String name, Object value), and
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void delete(String name)
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</pre>
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A list of all the X.509 v3 Certificate attributes that can be manipulated
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is provided in the following table.
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For example, if you want to get the signature component of
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the certificate:
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<pre>
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X509CertImpl cert;
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// get the certificate object
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byte[] sig = (byte[])cert.get("x509.signature");
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// using the fully-qualified identifier
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OR
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byte[] sig = (byte[])cert.get(X509CertImpl.SIG);
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// using defined constants
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</pre>
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<p>
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<table border=1>
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<caption>sun.security.x509.X509CertImpl</caption>
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<tr>
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<td><strong>Attribute</strong></td>
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<td><strong>Fully-qualified identifier</strong></td>
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<td><strong>Defined constants</strong></td>
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<td><strong>Type of Object returned</strong><br>
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(in sun.security.x509 unless fully-qualified)</td>
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</tr>
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<tr>
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<td>signatureAlgorithm</td>
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<td>x509.algorithm</td>
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<td>X509CertImpl.SIG_ALG</td>
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<td>AlgorithmId</td>
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</tr>
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<tr>
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<td>signature</td>
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<td>x509.signature</td>
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<td>X509CertImpl.SIG</td>
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<td>byte[]</td>
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</tr>
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<tr>
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<td>tbsCertificate</td>
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<td>x509.info</td>
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<td>X509CertInfo.IDENT</td>
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<td>X509CertInfo</td>
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</tr>
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<tr>
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<td>version</td>
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<td>x509.info.version<br>
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x509.info.version.number</td>
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<td>CertificateVersion.IDENT<br>
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none</td>
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<td>CertificateVersion<br>
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java.lang.Integer</td>
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</tr>
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<tr>
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<td>serialNumber</td>
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<td>x509.info.serialNumber<br>
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x509.info.serialNumber.number</td>
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<td>CertificateSerialNumber.IDENT<br>
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X509CertImpl.SERIAL_ID</td>
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<td>CertificateSerialNumber<br>
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SerialNumber</td>
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</tr>
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<tr>
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<td>signature</td>
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<td>x509.info.algorithmID<br>
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x509.info.algorithmID.algorithm</td>
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<td>CertificateAlgorithmId.IDENT<br>
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none</td>
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<td>CertificateAlgorithmId<br>
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AlgorithmId</td>
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</tr>
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<tr>
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<td>issuer</td>
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<td>x509.info.issuer<br>
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x509.info.issuer.dname</td>
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<td>CertificateIssuerName.IDENT<br>
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X509CertImpl.ISSUER_DN</td>
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<td>CertificateIssuerName<br>
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X500Name</td>
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</tr>
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<tr>
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<td>validity<br>
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validity.notAfter<br>
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validity.notBefore</td>
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<td>x509.info.validity<br>
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x509.info.validity.notAfter<br>
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x509.info.validity.notBefore</td>
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<td>CertificateValidity.IDENT<br>
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none<br>
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none</td>
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<td>CertificateValidity<br>
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java.util.Date<br>
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java.util.Date</td>
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</tr>
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<tr>
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<td>subject</td>
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<td>x509.info.subject<br>
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x509.info.subject.dname</td>
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<td>CertificateSubjectName.IDENT<br>
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X509CertImpl.SUBJECT_DN</td>
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<td>CertificateSubjectName<br>
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X500Name</td>
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</tr>
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<tr>
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<td>subjectPublicKeyInfo</td>
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<td>x509.info.key<br>
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x509.info.key.value</td>
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<td>CertificateX509Key.IDENT<br>
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X509CertImpl.PUBLIC_KEY</td>
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<td>CertificateX509Key<br>
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X509Key</td>
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</tr>
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<tr>
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<td>issuerUniqueID</td>
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<td>x509.info.issuerID<br>
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x509.info.issuerID.id</td>
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<td>CertificateIssuerUniqueIdentity.IDENT<br>
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none</td>
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<td>CertificateIssuerUniqueIdentity<br>
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UniqueIdentity</td>
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</tr>
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<tr>
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<td>subjectUniqueID</td>
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<td>x509.info.subjectID<br>
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x509.info.subjectID.id</td>
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<td>CertificateSubjectUniqueIdentity.IDENT<br>
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none</td>
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<td>CertificateSubjectUniqueIdentity<br>
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UniqueIdentity</td>
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</tr>
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<tr>
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<td>extensions</td>
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<td>x509.info.extensions</td>
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<td>CertificateExtensions.IDENT</td>
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<td>CertificateExtensions</td>
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</tr>
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</table>
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<br>
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<br>
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<table border=1>
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<caption>X.509 V3 certificate extensions</caption>
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<tr>
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<td><strong>Extension</strong></td>
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<td><strong>Extension attribute identifier</strong></td>
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<td><strong>Short form</strong></td>
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<td><strong>Type of Object returned</strong></td>
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</tr>
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<tr>
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<td>Authority Key Identifier</td>
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<td>x509.info.extensions.AuthorityKeyIdentifier</td>
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<td>AuthorityKeyIdentifierExtension.IDENT</td>
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<td>AuthorityKeyIdentifierExtension</td>
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</tr>
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<tr>
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<td>Subject Key Identifier</td>
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<td>x509.info.extensions.SubjectKeyIdentifier</td>
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<td>SubjectKeyIdentifierExtension.IDENT</td>
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<td>SubjectKeyIdentifierExtension</td>
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</tr>
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<tr>
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<td>Key Usage</td>
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<td>x509.info.extensions.KeyUsage</td>
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<td>KeyUsageExtension.IDENT</td>
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<td>KeyUsageExtension</td>
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</tr>
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<tr>
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<td>Private Key Usage Period</td>
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<td>x509.info.extensions.PrivateKeyUsage</td>
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<td>PrivateKeyUsageExtension.IDENT</td>
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<td>PrivateKeyUsageExtension</td>
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</tr>
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<tr>
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<td>Policy Mappings</td>
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<td>x509.info.extensions.PolicyMappings</td>
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<td>PolicyMappingsExtension.IDENT</td>
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<td>PolicyMappingsExtension</td>
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</tr>
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<tr>
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<td>Subject Alternative Name</td>
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<td>x509.info.extensions.SubjectAlternativeName</td>
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<td>SubjectAlternativeNameExtension.IDENT</td>
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<td>SubjectAlternativeNameExtension</td>
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</tr>
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<tr>
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<td>Issuer Alternative Name</td>
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<td>x509.info.extensions.IssuerAlternativeName</td>
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<td>IssuerAlternativeNameExtension.IDENT</td>
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<td>IssuerAlternativeNameExtension</td>
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</tr>
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<tr>
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<td>Basic Constraints</td>
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<td>x509.info.extensions.BasicConstraints</td>
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<td>BasicConstraintsExtension.IDENT</td>
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<td>BasicConstraintsExtension</td>
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</tr>
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<tr>
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<td>Name Constraints</td>
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<td>x509.info.extensions.NameConstraints</td>
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<td>NameConstraintsExtension.IDENT</td>
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<td>NameConstraintsExtension</td>
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</tr>
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<tr>
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<td>Policy Constraints</td>
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<td>x509.info.extensions.PolicyConstraints</td>
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<td>PolicyConstraintsExtension.IDENT</td>
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<td>PolicyConstraintsExtension</td>
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</tr>
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<tr>
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<td>Netscape Certificate Type</td>
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<td>x509.info.extensions.NetscapeCertType</td>
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<td>NetscapeCertTypeExtension.IDENT</td>
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<td>NetscapeCertTypeExtension</td>
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</tr>
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</table>
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<p>
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Extensions can be added by implementing the
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<code>sun.security.x509.CertAttrSet</code> interface and
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subclassing <code>sun.security.x509.Extension</code> class.
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Register the new extension using the OIDMap class.
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The following extensions are not currently supported from the
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PKIX profile:
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<table>
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<tr>
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<td>Name</td>
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<td>ObjectIdentifier</td>
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</tr>
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<tr>
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<td>CertificatePolicies</td>
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<td>2.5.29.32</td>
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</tr>
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</table>
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</BODY>
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</HTML>
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