/* X509Extension.java --- X.509 Extension Copyright (C) 1999 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath 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 for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. */ package java.security.cert; import java.util.Set; /** Public interface for the X.509 Extension. This is used for X.509 v3 Certificates and CRL v2 (Certificate Revocation Lists) for managing attributes assoicated with Certificates, for managing the hierarchy of certificates, and for managing the distribution of CRL. This extension format is used to define private extensions. Each extensions for a certificate or CRL must be marked either critical or non-critical. If the certificate/CRL system encounters a critical extension not recognized then it must reject the certificate. A non-critical extension may be just ignored if not recognized. The ASN.1 definition for this class is: Extensions ::= SEQUENCE SIZE (1..MAX) OF Extension Extension ::= SEQUENCE { extnId OBJECT IDENTIFIER, critical BOOLEAN DEFAULT FALSE, extnValue OCTET STRING -- contains a DER encoding of a value -- of the type registered for use with -- the extnId object identifier value } @author Mark Benvenuto @since JDK 1.2 */ public interface X509Extension { /** Returns true if the certificate contains a critical extension that is not supported. @return true if has unsupported extension, false otherwise */ boolean hasUnsupportedCriticalExtension(); /** Returns a set of the CRITICAL extension OIDs from the certificate/CRL that the object implementing this interface manages. @return A Set containing the OIDs. If there are no CRITICAL extensions or extensions at all this returns null. */ Set getCriticalExtensionOIDs(); /** Returns a set of the NON-CRITICAL extension OIDs from the certificate/CRL that the object implementing this interface manages. @return A Set containing the OIDs. If there are no NON-CRITICAL extensions or extensions at all this returns null. */ Set getNonCriticalExtensionOIDs(); /** Returns the DER encoded OCTET string for the specified extension value identified by a OID. The OID is a string of number separated by periods. Ex: 12.23.45.67 */ byte[] getExtensionValue(String oid); }