X509CRLSelector

public class X509CRLSelector extends Object
implements CRLSelector

A CRLSelector that selects X509CRLs that match all specified criteria. This class is particularly useful when selecting CRLs from a CertStore to check revocation status of a particular certificate.

When first constructed, an X509CRLSelector has no criteria enabled and each of the get methods return a default value (null). Therefore, the match method would return true for any X509CRL. Typically, several criteria are enabled (by calling setIssuers or setDateAndTime, for instance) and then the X509CRLSelector is passed to CertStore.getCRLs or some similar method.

Please refer to RFC 3280: Internet X.509 Public Key Infrastructure Certificate and CRL Profile for definitions of the X.509 CRL fields and extensions mentioned below.

Concurrent Access

Unless otherwise specified, the methods defined in this class are not thread-safe. Multiple threads that need to access a single object concurrently should synchronize amongst themselves and provide the necessary locking. Multiple threads each manipulating separate objects need not synchronize.

Public Constructor Summary

X509CRLSelector()
Creates an X509CRLSelector.

Public Method Summary

void
addIssuer(X500Principal issuer)
Adds a name to the issuerNames criterion.
void
addIssuerName(byte[] name)
Adds a name to the issuerNames criterion.
void
addIssuerName(String name)
Denigrated, use {@linkplain #addIssuer(X500Principal)} or {@linkplain #addIssuerName(byte[])} instead.
Object
clone()
Returns a copy of this object.
X509Certificate
getCertificateChecking()
Returns the certificate being checked.
Date
getDateAndTime()
Returns the dateAndTime criterion.
Collection<Object>
getIssuerNames()
Returns a copy of the issuerNames criterion.
Collection<X500Principal>
getIssuers()
Returns the issuerNames criterion.
BigInteger
getMaxCRL()
Returns the maxCRLNumber criterion.
BigInteger
getMinCRL()
Returns the minCRLNumber criterion.
boolean
match(CRL crl)
Decides whether a CRL should be selected.
void
setCertificateChecking(X509Certificate cert)
Sets the certificate being checked.
void
setDateAndTime(Date dateAndTime)
Sets the dateAndTime criterion.
void
setIssuerNames(Collection<?> names)
Note: use {@linkplain #setIssuers(Collection)} instead or only specify the byte array form of distinguished names when using this method.
void
setIssuers(Collection<X500Principal> issuers)
Sets the issuerNames criterion.
void
setMaxCRLNumber(BigInteger maxCRL)
Sets the maxCRLNumber criterion.
void
setMinCRLNumber(BigInteger minCRL)
Sets the minCRLNumber criterion.
String
toString()
Returns a printable representation of the X509CRLSelector.

Inherited Method Summary

Public Constructors

public X509CRLSelector ()

Creates an X509CRLSelector. Initially, no criteria are set so any X509CRL will match.

Public Methods

public void addIssuer (X500Principal issuer)

Adds a name to the issuerNames criterion. The issuer distinguished name in the X509CRL must match at least one of the specified distinguished names.

This method allows the caller to add a name to the set of issuer names which X509CRLs may contain. The specified name is added to any previous value for the issuerNames criterion. If the specified name is a duplicate, it may be ignored.

Parameters
issuer the issuer as X500Principal

public void addIssuerName (byte[] name)

Adds a name to the issuerNames criterion. The issuer distinguished name in the X509CRL must match at least one of the specified distinguished names.

This method allows the caller to add a name to the set of issuer names which X509CRLs may contain. The specified name is added to any previous value for the issuerNames criterion. If the specified name is a duplicate, it may be ignored. If a name is specified as a byte array, it should contain a single DER encoded distinguished name, as defined in X.501. The ASN.1 notation for this structure is as follows.

The name is provided as a byte array. This byte array should contain a single DER encoded distinguished name, as defined in X.501. The ASN.1 notation for this structure appears in the documentation for setIssuerNames(Collection names).

Note that the byte array supplied here is cloned to protect against subsequent modifications.

Parameters
name a byte array containing the name in ASN.1 DER encoded form
Throws
IOException if a parsing error occurs

public void addIssuerName (String name)

Denigrated, use {@linkplain #addIssuer(X500Principal)} or {@linkplain #addIssuerName(byte[])} instead. This method should not be relied on as it can fail to match some CRLs because of a loss of encoding information in the RFC 2253 String form of some distinguished names.

Adds a name to the issuerNames criterion. The issuer distinguished name in the X509CRL must match at least one of the specified distinguished names.

This method allows the caller to add a name to the set of issuer names which X509CRLs may contain. The specified name is added to any previous value for the issuerNames criterion. If the specified name is a duplicate, it may be ignored.

Parameters
name the name in RFC 2253 form
Throws
IOException if a parsing error occurs

public Object clone ()

Returns a copy of this object.

Returns
  • the copy

public X509Certificate getCertificateChecking ()

Returns the certificate being checked. This is not a criterion. Rather, it is optional information that may help a CertStore find CRLs that would be relevant when checking revocation for the specified certificate. If the value returned is null, then no such optional information is provided.

Returns
  • the certificate being checked (or null)

public Date getDateAndTime ()

Returns the dateAndTime criterion. The specified date must be equal to or later than the value of the thisUpdate component of the X509CRL and earlier than the value of the nextUpdate component. There is no match if the X509CRL does not contain a nextUpdate component. If null, no dateAndTime check will be done.

Note that the Date returned is cloned to protect against subsequent modifications.

Returns
  • the Date to match against (or null)

public Collection<Object> getIssuerNames ()

Returns a copy of the issuerNames criterion. The issuer distinguished name in the X509CRL must match at least one of the specified distinguished names. If the value returned is null, any issuer distinguished name will do.

If the value returned is not null, it is a Collection of names. Each name is a String or a byte array representing a distinguished name (in RFC 2253 or ASN.1 DER encoded form, respectively). Note that the Collection returned may contain duplicate names.

If a name is specified as a byte array, it should contain a single DER encoded distinguished name, as defined in X.501. The ASN.1 notation for this structure is given in the documentation for setIssuerNames(Collection names).

Note that a deep copy is performed on the Collection to protect against subsequent modifications.

Returns
  • a Collection of names (or null)

public Collection<X500Principal> getIssuers ()

Returns the issuerNames criterion. The issuer distinguished name in the X509CRL must match at least one of the specified distinguished names. If the value returned is null, any issuer distinguished name will do.

If the value returned is not null, it is a unmodifiable Collection of X500Principals.

Returns
  • an unmodifiable Collection of names (or null)

public BigInteger getMaxCRL ()

Returns the maxCRLNumber criterion. The X509CRL must have a CRL number extension whose value is less than or equal to the specified value. If null, no maxCRLNumber check will be done.

Returns
  • the maximum CRL number accepted (or null)

public BigInteger getMinCRL ()

Returns the minCRLNumber criterion. The X509CRL must have a CRL number extension whose value is greater than or equal to the specified value. If null, no minCRLNumber check will be done.

Returns
  • the minimum CRL number accepted (or null)

public boolean match (CRL crl)

Decides whether a CRL should be selected.

Parameters
crl the CRL to be checked
Returns
  • true if the CRL should be selected, false otherwise

public void setCertificateChecking (X509Certificate cert)

Sets the certificate being checked. This is not a criterion. Rather, it is optional information that may help a CertStore find CRLs that would be relevant when checking revocation for the specified certificate. If null is specified, then no such optional information is provided.

Parameters
cert the X509Certificate being checked (or null)

public void setDateAndTime (Date dateAndTime)

Sets the dateAndTime criterion. The specified date must be equal to or later than the value of the thisUpdate component of the X509CRL and earlier than the value of the nextUpdate component. There is no match if the X509CRL does not contain a nextUpdate component. If null, no dateAndTime check will be done.

Note that the Date supplied here is cloned to protect against subsequent modifications.

Parameters
dateAndTime the Date to match against (or null)
See Also

public void setIssuerNames (Collection<?> names)

Note: use {@linkplain #setIssuers(Collection)} instead or only specify the byte array form of distinguished names when using this method. See addIssuerName(String) for more information.

Sets the issuerNames criterion. The issuer distinguished name in the X509CRL must match at least one of the specified distinguished names. If null, any issuer distinguished name will do.

This method allows the caller to specify, with a single method call, the complete set of issuer names which X509CRLs may contain. The specified value replaces the previous value for the issuerNames criterion.

The names parameter (if not null) is a Collection of names. Each name is a String or a byte array representing a distinguished name (in RFC 2253 or ASN.1 DER encoded form, respectively). If null is supplied as the value for this argument, no issuerNames check will be performed.

Note that the names parameter can contain duplicate distinguished names, but they may be removed from the Collection of names returned by the getIssuerNames method.

If a name is specified as a byte array, it should contain a single DER encoded distinguished name, as defined in X.501. The ASN.1 notation for this structure is as follows.


 Name ::= CHOICE {
   RDNSequence }

 RDNSequence ::= SEQUENCE OF RelativeDistinguishedName

 RelativeDistinguishedName ::=
   SET SIZE (1 .. MAX) OF AttributeTypeAndValue

 AttributeTypeAndValue ::= SEQUENCE {
   type     AttributeType,
   value    AttributeValue }

 AttributeType ::= OBJECT IDENTIFIER

 AttributeValue ::= ANY DEFINED BY AttributeType
 ....
 DirectoryString ::= CHOICE {
       teletexString           TeletexString (SIZE (1..MAX)),
       printableString         PrintableString (SIZE (1..MAX)),
       universalString         UniversalString (SIZE (1..MAX)),
       utf8String              UTF8String (SIZE (1.. MAX)),
       bmpString               BMPString (SIZE (1..MAX)) }
 

Note that a deep copy is performed on the Collection to protect against subsequent modifications.

Parameters
names a Collection of names (or null)
Throws
IOException if a parsing error occurs
See Also

public void setIssuers (Collection<X500Principal> issuers)

Sets the issuerNames criterion. The issuer distinguished name in the X509CRL must match at least one of the specified distinguished names. If null, any issuer distinguished name will do.

This method allows the caller to specify, with a single method call, the complete set of issuer names which X509CRLs may contain. The specified value replaces the previous value for the issuerNames criterion.

The names parameter (if not null) is a Collection of X500Principals.

Note that the names parameter can contain duplicate distinguished names, but they may be removed from the Collection of names returned by the getIssuers method.

Note that a copy is performed on the Collection to protect against subsequent modifications.

Parameters
issuers a Collection of X500Principals (or null)
See Also

public void setMaxCRLNumber (BigInteger maxCRL)

Sets the maxCRLNumber criterion. The X509CRL must have a CRL number extension whose value is less than or equal to the specified value. If null, no maxCRLNumber check will be done.

Parameters
maxCRL the maximum CRL number accepted (or null)

public void setMinCRLNumber (BigInteger minCRL)

Sets the minCRLNumber criterion. The X509CRL must have a CRL number extension whose value is greater than or equal to the specified value. If null, no minCRLNumber check will be done.

Parameters
minCRL the minimum CRL number accepted (or null)

public String toString ()

Returns a printable representation of the X509CRLSelector.

Returns
  • a String describing the contents of the X509CRLSelector.