java.security.cert

Class PKIXCertPathChecker

Implemented Interfaces:
Cloneable

public abstract class PKIXCertPathChecker
extends Object
implements Cloneable

A validator for X.509 certificates when approving certificate chains.

Concrete subclasses can be passed to the PKIXParameters.setCertPathCheckers(java.util.List) and PKIXParameters.addCertPathChecker(PKIXCertPathChecker) methods, which are then used to set up PKIX certificate chain builders or validators. These classes then call the check(java.security.cert.Certificate,java.util.Collection) method of this class, performing whatever checks on the certificate, throwing an exception if any check fails.

Subclasses of this must be able to perform their checks in the backward direction -- from the most-trusted certificate to the target -- and may optionally support forward checking -- from the target to the most-trusted certificate.

Since:
1.4
See Also:
PKIXParameters

Constructor Summary

PKIXCertPathChecker()
Default constructor.

Method Summary

abstract void
check(Certificate cert, Collection unresolvedCritExts)
Checks a certificate, removing any critical extensions that are resolved in this check.
Object
clone()
abstract Set
getSupportedExtensions()
Returns an immutable set of X.509 extension object identifiers (OIDs) supported by this PKIXCertPathChecker.
abstract void
init(boolean forward)
Initialize this PKIXCertPathChecker.
abstract boolean
isForwardCheckingSupported()
Returns whether or not this class supports forward checking.

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

PKIXCertPathChecker

protected PKIXCertPathChecker()
Default constructor.

Method Details

check

public abstract void check(Certificate cert,
                           Collection unresolvedCritExts)
            throws CertPathValidatorException
Checks a certificate, removing any critical extensions that are resolved in this check.
Parameters:
cert - The certificate to check.
unresolvedCritExts - The (mutable) collection of as-of-yet unresolved critical extensions, as OID strings.
Throws:
CertPathValidatorException - If this certificate fails this check.

clone

public Object clone()
Overrides:
clone in interface Object

getSupportedExtensions

public abstract Set getSupportedExtensions()
Returns an immutable set of X.509 extension object identifiers (OIDs) supported by this PKIXCertPathChecker.
Returns:
An immutable set of Strings of the supported X.509 OIDs, or null if no extensions are supported.

init

public abstract void init(boolean forward)
            throws CertPathValidatorException
Initialize this PKIXCertPathChecker. If subclasses support forward checking, a value of true can be passed to this method, and certificates can be validated from the target certificate to the most-trusted certifcate.
Parameters:
forward - The direction of this PKIXCertPathChecker.
Throws:
CertPathValidatorException - If forward is true and this class does not support forward checking.

isForwardCheckingSupported

public abstract boolean isForwardCheckingSupported()
Returns whether or not this class supports forward checking.
Returns:
Whether or not this class supports forward checking.

PKIXCertPathChecker.java -- checks X.509 certificate paths. Copyright (C) 2003 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.