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Added in API level 24

Summary: Methods

CertPathChecker

public interface CertPathChecker

java.security.cert.CertPathChecker

Known indirect subclasses

PKIXCertPathChecker, PKIXRevocationChecker

PKIXCertPathChecker	An abstract class that performs one or more checks on an `X509Certificate`.
PKIXRevocationChecker	A `PKIXCertPathChecker` for checking the revocation status of certificates with the PKIX algorithm.

Performs one or more checks on each Certificate of a CertPath.

A CertPathChecker implementation is typically created to extend a certification path validation algorithm. For example, an implementation may check for and process a critical private extension of each certificate in a certification path.

Summary

Public methods
`abstract void`	`check(Certificate cert)` Performs the check(s) on the specified certificate using its internal state.
`abstract void`	`init(boolean forward)` Initializes the internal state of this `CertPathChecker`.
`abstract boolean`	`isForwardCheckingSupported()` Indicates if forward checking is supported.

Public methods

check

Added in API level 24

public abstract void check (Certificate cert)

Performs the check(s) on the specified certificate using its internal state. The certificates are presented in the order specified by the init method.

Parameters
`cert`	`Certificate`: the `Certificate` to be checked

Throws
`CertPathValidatorException`	if the specified certificate does not pass the check

init

Added in API level 24

public abstract void init (boolean forward)

Initializes the internal state of this CertPathChecker.

The forward flag specifies the order that certificates will be passed to the check method (forward or reverse).

Parameters
`forward`	`boolean`: the order that certificates are presented to the `check` method. If `true`, certificates are presented from target to trust anchor (forward); if `false`, from trust anchor to target (reverse).

Throws
`CertPathValidatorException`	if this `CertPathChecker` is unable to check certificates in the specified order

isForwardCheckingSupported

Added in API level 24

public abstract boolean isForwardCheckingSupported ()

Indicates if forward checking is supported. Forward checking refers to the ability of the CertPathChecker to perform its checks when certificates are presented to the check method in the forward direction (from target to trust anchor).

Returns
`boolean`	`true` if forward checking is supported, `false` otherwise

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Last updated 2026-08-03 UTC.

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