# Package java.security.cert

package java.security.cert
Provides classes and interfaces for parsing and managing certificates, certificate revocation lists (CRLs), and certification paths. It contains support for X.509 v3 certificates and X.509 v2 CRLs.

## Package Specification

- Java Cryptography Architecture (JCA) Reference Guide
- RFC 5280: Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile
- RFC 2560: X.509 Internet Public Key Infrastructure Online Certificate Status Protocol - OCSP
- Java Security Standard Algorithm Names Specification

## Related Documentation

For information about X.509 certificates and CRLs, please see:

- http://www.ietf.org/rfc/rfc5280.txt
- Java PKI Programmer's Guide

Since:
  1.2
External Specifications
  - Java Security Standard Algorithm Names
  - RFC 2560: X.509 Internet Public Key Infrastructure Online Certificate Status Protocol - OCSP
  - RFC 5280: Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile

Related Packages
Package
Description
java.security
Provides the classes and interfaces for the security framework.
java.security.interfaces
Provides interfaces for generating RSA (Rivest, Shamir and Adleman AsymmetricCipher algorithm) keys as defined in the RSA Laboratory Technical Note PKCS#1, and DSA (Digital Signature Algorithm) keys as defined in NIST's FIPS-186.
java.security.spec
Provides classes and interfaces for key specifications and algorithm parameter specifications.
Class
Description
Certificate
Abstract class for managing a variety of identity certificates.
Certificate.CertificateRep
Alternate `Certificate` class for serialization.
CertificateEncodingException
Certificate Encoding Exception.
CertificateException
This exception indicates one of a variety of certificate problems.
CertificateExpiredException
Certificate Expired Exception.
CertificateFactory
This class defines the functionality of a certificate factory, which is used to generate certificate, certification path (`CertPath`) and certificate revocation list (CRL) objects from their encodings.
CertificateFactorySpi
This class defines the Service Provider Interface (SPI) for the `CertificateFactory` class.
CertificateNotYetValidException
Certificate is not yet valid exception.
CertificateParsingException
Certificate Parsing Exception.
CertificateRevokedException
An exception that indicates an X.509 certificate is revoked.
CertPath
An immutable sequence of certificates (a certification path).
CertPath.CertPathRep
Alternate `CertPath` class for serialization.
CertPathBuilder
A class for building certification paths (also known as certificate chains).
CertPathBuilderException
An exception indicating one of a variety of problems encountered when building a certification path with a `CertPathBuilder`.
CertPathBuilderResult
A specification of the result of a certification path builder algorithm.
CertPathBuilderSpi
The Service Provider Interface (SPI) for the `CertPathBuilder` class.
CertPathChecker
Performs one or more checks on each `Certificate` of a `CertPath`.
CertPathParameters
A specification of certification path algorithm parameters.
CertPathValidator
A class for validating certification paths (also known as certificate chains).
CertPathValidatorException
An exception indicating one of a variety of problems encountered when validating a certification path.
CertPathValidatorException.BasicReason
The BasicReason enumerates the potential reasons that a certification path of any type may be invalid.
CertPathValidatorException.Reason
The reason the validation algorithm failed.
CertPathValidatorResult
A specification of the result of a certification path validator algorithm.
CertPathValidatorSpi
The Service Provider Interface (SPI) for the `CertPathValidator` class.
CertSelector
A selector that defines a set of criteria for selecting `Certificate`s.
CertStore
A class for retrieving `Certificate`s and `CRL`s from a repository.
CertStoreException
An exception indicating one of a variety of problems retrieving certificates and CRLs from a `CertStore`.
CertStoreParameters
A specification of `CertStore` parameters.
CertStoreSpi
The Service Provider Interface (SPI) for the `CertStore` class.
CollectionCertStoreParameters
Parameters used as input for the Collection `CertStore` algorithm.
CRL
This class is an abstraction of certificate revocation lists (CRLs) that have different formats but important common uses.
CRLException
CRL (Certificate Revocation List) Exception.
CRLReason
The CRLReason enumeration specifies the reason that a certificate is revoked, as defined in RFC 5280: Internet X.509 Public Key Infrastructure Certificate and CRL Profile.
CRLSelector
A selector that defines a set of criteria for selecting `CRL`s.
Extension
This interface represents an X.509 extension.
LDAPCertStoreParameters
Parameters used as input for the LDAP `CertStore` algorithm.
PKIXBuilderParameters
Parameters used as input for the PKIX `CertPathBuilder` algorithm.
PKIXCertPathBuilderResult
This class represents the successful result of the PKIX certification path builder algorithm.
PKIXCertPathChecker
An abstract class that performs one or more checks on an `X509Certificate`.
PKIXCertPathValidatorResult
This class represents the successful result of the PKIX certification path validation algorithm.
PKIXParameters
Parameters used as input for the PKIX `CertPathValidator` algorithm.
PKIXReason
The `PKIXReason` enumerates the potential PKIX-specific reasons that an X.509 certification path may be invalid according to the PKIX (RFC 5280) standard.
PKIXRevocationChecker
A `PKIXCertPathChecker` for checking the revocation status of certificates with the PKIX algorithm.
PKIXRevocationChecker.Option
Various revocation options that can be specified for the revocation checking mechanism.
PolicyNode
An immutable valid policy tree node as defined by the PKIX certification path validation algorithm.
PolicyQualifierInfo
An immutable policy qualifier represented by the ASN.1 PolicyQualifierInfo structure.
TrustAnchor
A trust anchor or most-trusted Certification Authority (CA).
URICertStoreParameters
Parameters used as input for `CertStore` algorithms which use information contained in a URI to retrieve certificates and CRLs.
X509Certificate
Abstract class for X.509 certificates.
X509CertSelector
A `CertSelector` that selects `X509Certificates` that match all specified criteria.
X509CRL
Abstract class for an X.509 Certificate Revocation List (CRL).
X509CRLEntry
Abstract class for a revoked certificate in a CRL (Certificate Revocation List).
X509CRLSelector
A `CRLSelector` that selects `X509CRLs` that match all specified criteria.
X509Extension
Interface for an X.509 extension.