java.security.cert
Class PKIXCertPathChecker

java.lang.Object
  java.security.cert.PKIXCertPathChecker

All 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(java.security.cert.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.

See Also:

PKIXParameters

Constructor Summary

protected

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() clone creates a shallow clone of this.
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

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PKIXCertPathChecker

protected PKIXCertPathChecker()

Default constructor.

Method Detail

clone

public Object clone()

Description copied from class: Object

clone creates a shallow clone of this.

Overrides:

clone in class Object

Returns:

a clone of this object.

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.

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.

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.