001/* X509Extension.java --- X.509 Extension 002 Copyright (C) 1999 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package java.security.cert; 040import java.util.Set; 041 042/** 043 Public interface for the X.509 Extension. 044 045 This is used for X.509 v3 Certificates and CRL v2 (Certificate 046 Revocation Lists) for managing attributes assoicated with 047 Certificates, for managing the hierarchy of certificates, 048 and for managing the distribution of CRL. This extension 049 format is used to define private extensions. 050 051 Each extensions for a certificate or CRL must be marked 052 either critical or non-critical. If the certificate/CRL 053 system encounters a critical extension not recognized then 054 it must reject the certificate. A non-critical extension 055 may be just ignored if not recognized. 056 057 058 The ASN.1 definition for this class is: 059 060 Extensions ::= SEQUENCE SIZE (1..MAX) OF Extension 061 062 Extension ::= SEQUENCE { 063 extnId OBJECT IDENTIFIER, 064 critical BOOLEAN DEFAULT FALSE, 065 extnValue OCTET STRING 066 -- contains a DER encoding of a value 067 -- of the type registered for use with 068 -- the extnId object identifier value 069 } 070 071 @author Mark Benvenuto 072 073 @since 1.2 074*/ 075public interface X509Extension 076{ 077 078 /** 079 Returns true if the certificate contains a critical extension 080 that is not supported. 081 082 @return true if has unsupported extension, false otherwise 083 */ 084 boolean hasUnsupportedCriticalExtension(); 085 086 /** 087 Returns a set of the CRITICAL extension OIDs from the 088 certificate/CRL that the object implementing this interface 089 manages. 090 091 @return A Set containing the OIDs. If there are no CRITICAL 092 extensions or extensions at all this returns null. 093 */ 094 Set<String> getCriticalExtensionOIDs(); 095 096 /** 097 Returns a set of the NON-CRITICAL extension OIDs from the 098 certificate/CRL that the object implementing this interface 099 manages. 100 101 @return A Set containing the OIDs. If there are no NON-CRITICAL 102 extensions or extensions at all this returns null. 103 */ 104 Set<String> getNonCriticalExtensionOIDs(); 105 106 /** 107 Returns the DER encoded OCTET string for the specified 108 extension value identified by a OID. The OID is a string 109 of number separated by periods. Ex: 12.23.45.67 110 */ 111 byte[] getExtensionValue(String oid); 112 113}