Initial revision

From-SVN: r102074

libjava/classpath/java/security/cert/X509Extension.java

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+/* 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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 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);
+
+}