java.security.cert

Class PKIXCertPathChecker

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 {@link PKIXParameters#setCertPathCheckers(java.util.List)} and {@link 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 {@link #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
protected PKIXCertPathChecker()
Default constructor.
Method Summary
abstract voidcheck(Certificate cert, Collection<String> unresolvedCritExts)
Checks a certificate, removing any critical extensions that are resolved in this check.
Objectclone()
abstract Set<String>getSupportedExtensions()
Returns an immutable set of X.509 extension object identifiers (OIDs) supported by this PKIXCertPathChecker.
abstract voidinit(boolean forward)
Initialize this PKIXCertPathChecker.
abstract booleanisForwardCheckingSupported()
Returns whether or not this class supports forward checking.

Constructor Detail

PKIXCertPathChecker

protected PKIXCertPathChecker()
Default constructor.

Method Detail

check

public abstract void check(Certificate cert, Collection<String> unresolvedCritExts)
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()

getSupportedExtensions

public abstract Set<String> 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)
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.