X509CRL

 CertificateList  ::=  SEQUENCE  {
     tbsCertList          TBSCertList,
     signatureAlgorithm   AlgorithmIdentifier,
     signature            BIT STRING  }
 

 TBSCertList  ::=  SEQUENCE  {
     version                 Version OPTIONAL,
                             -- if present, must be v2
     signature               AlgorithmIdentifier,
     issuer                  Name,
     thisUpdate              ChoiceOfTime,
     nextUpdate              ChoiceOfTime OPTIONAL,
     revokedCertificates     SEQUENCE OF SEQUENCE  {
         userCertificate         CertificateSerialNumber,
         revocationDate          ChoiceOfTime,
         crlEntryExtensions      Extensions OPTIONAL
                                 -- if present, must be v2
         }  OPTIONAL,
     crlExtensions           [0]  EXPLICIT Extensions OPTIONAL
                                  -- if present, must be v2
     }
 

 InputStream inStream = null;
 try {
     inStream = new FileInputStream("fileName-of-crl");
     CertificateFactory cf = CertificateFactory.getInstance("X.509");
     X509CRL crl = (X509CRL)cf.generateCRL(inStream);
 } finally {
     if (inStream != null) {
         inStream.close();
     }
 }
 

X509CRL

X509CRL ()

Constructor for X.509 CRLs.

equals

boolean equals (Object other)

Compares this CRL for equality with the given object. If the other object is an instanceof X509CRL, then its encoded form is retrieved and compared with the encoded form of this CRL.

Parameters
other	Object: the object to test for equality with this CRL.

Returns
boolean	true iff the encoded forms of the two CRLs match, false otherwise.

getEncoded

byte[] getEncoded ()

Returns the ASN.1 DER-encoded form of this CRL.

Returns
byte[]	the encoded form of this certificate

Throws
CRLException	if an encoding error occurs.

getIssuerDN

Principal getIssuerDN ()

Denigrated, replaced by getIssuerX500Principal(). This method returns the issuer as an implementation specific Principal object, which should not be relied upon by portable code.

Gets the issuer (issuer distinguished name) value from the CRL. The issuer name identifies the entity that signed (and issued) the CRL.

The issuer name field contains an X.500 distinguished name (DN). The ASN.1 definition for this is:

 issuer    Name

 Name ::= CHOICE { RDNSequence }
 RDNSequence ::= SEQUENCE OF RelativeDistinguishedName
 RelativeDistinguishedName ::=
     SET OF AttributeValueAssertion

 AttributeValueAssertion ::= SEQUENCE {
                               AttributeType,
                               AttributeValue }
 AttributeType ::= OBJECT IDENTIFIER
 AttributeValue ::= ANY
 

The Name describes a hierarchical name composed of attributes, such as country name, and corresponding values, such as US. The type of the AttributeValue component is determined by the AttributeType; in general it will be a directoryString. A directoryString is usually one of PrintableString, TeletexString or UniversalString.

Returns
Principal	a Principal whose name is the issuer distinguished name.

getIssuerX500Principal

X500Principal getIssuerX500Principal ()

Returns the issuer (issuer distinguished name) value from the CRL as an X500Principal.

It is recommended that subclasses override this method.

Returns
X500Principal	an X500Principal representing the issuer distinguished name

getNextUpdate

Date getNextUpdate ()

Gets the nextUpdate date from the CRL.

Returns
Date	the nextUpdate date from the CRL, or null if not present.

getRevokedCertificate

X509CRLEntry getRevokedCertificate (X509Certificate certificate)

Get the CRL entry, if any, for the given certificate.

This method can be used to lookup CRL entries in indirect CRLs, that means CRLs that contain entries from issuers other than the CRL issuer. The default implementation will only return entries for certificates issued by the CRL issuer. Subclasses that wish to support indirect CRLs should override this method.

Parameters
certificate	X509Certificate: the certificate for which a CRL entry is to be looked up

Returns
X509CRLEntry	the entry for the given certificate, or null if no such entry exists in this CRL.

Throws
NullPointerException	if certificate is null

getRevokedCertificate

X509CRLEntry getRevokedCertificate (BigInteger serialNumber)

Gets the CRL entry, if any, with the given certificate serialNumber.

Parameters
serialNumber	BigInteger: the serial number of the certificate for which a CRL entry is to be looked up

Returns
X509CRLEntry	the entry with the given serial number, or null if no such entry exists in this CRL.

getRevokedCertificates

Set<? extends X509CRLEntry> getRevokedCertificates ()

Gets all the entries from this CRL. This returns a Set of X509CRLEntry objects.

Returns
Set<? extends X509CRLEntry>	all the entries or null if there are none present.

getSigAlgName

String getSigAlgName ()

Gets the signature algorithm name for the CRL signature algorithm. An example is the string "SHA256withRSA". The ASN.1 definition for this is:

 signatureAlgorithm   AlgorithmIdentifier

 AlgorithmIdentifier  ::=  SEQUENCE  {
     algorithm               OBJECT IDENTIFIER,
     parameters              ANY DEFINED BY algorithm OPTIONAL  }
                             -- contains a value of the type
                             -- registered for use with the
                             -- algorithm object identifier value
 

The algorithm name is determined from the algorithm OID string.

Returns
String	the signature algorithm name.

getSigAlgOID

String getSigAlgOID ()

Gets the signature algorithm OID string from the CRL. An OID is represented by a set of nonnegative whole numbers separated by periods. For example, the string "1.2.840.10040.4.3" identifies the SHA-1 with DSA signature algorithm defined in RFC 3279: Algorithms and Identifiers for the Internet X.509 Public Key Infrastructure Certificate and CRL Profile.

See getSigAlgName for relevant ASN.1 definitions.

Returns
String	the signature algorithm OID string.

getSigAlgParams

byte[] getSigAlgParams ()

Gets the DER-encoded signature algorithm parameters from this CRL's signature algorithm. In most cases, the signature algorithm parameters are null; the parameters are usually supplied with the public key. If access to individual parameter values is needed then use AlgorithmParameters and instantiate with the name returned by getSigAlgName.

See getSigAlgName for relevant ASN.1 definitions.

Returns
byte[]	the DER-encoded signature algorithm parameters, or null if no parameters are present.

getSignature

byte[] getSignature ()

Gets the signature value (the raw signature bits) from the CRL. The ASN.1 definition for this is:

 signature     BIT STRING
 

Returns
byte[]	the signature.

getTBSCertList

byte[] getTBSCertList ()

Gets the DER-encoded CRL information, the tbsCertList from this CRL. This can be used to verify the signature independently.

Returns
byte[]	the DER-encoded CRL information.

Throws
CRLException	if an encoding error occurs.

getThisUpdate

Date getThisUpdate ()

Gets the thisUpdate date from the CRL. The ASN.1 definition for this is:

 thisUpdate   ChoiceOfTime
 ChoiceOfTime ::= CHOICE {
     utcTime        UTCTime,
     generalTime    GeneralizedTime }
 

Returns
Date	the thisUpdate date from the CRL.

getVersion

int getVersion ()

Gets the version (version number) value from the CRL. The ASN.1 definition for this is:

 version    Version OPTIONAL,
             -- if present, must be v2

 Version  ::=  INTEGER  {  v1(0), v2(1), v3(2)  }
             -- v3 does not apply to CRLs but appears for consistency
             -- with definition of Version for certs
 

Returns
int	the version number, i.e. 1 or 2.

hashCode

int hashCode ()

Returns a hashcode value for this CRL from its encoded form.

Returns
int	the hashcode value.

verify

void verify (PublicKey key)

Verifies that this CRL was signed using the private key that corresponds to the given public key.

Parameters
key	PublicKey: the PublicKey used to carry out the verification.

Throws
NoSuchAlgorithmException	on unsupported signature algorithms.
InvalidKeyException	on incorrect key.
NoSuchProviderException	if there's no default provider.
SignatureException	on signature errors.
CRLException	on encoding errors.

verify

void verify (PublicKey key, 
                String sigProvider)

Verifies that this CRL was signed using the private key that corresponds to the given public key. This method uses the signature verification engine supplied by the given provider.

Parameters
key	PublicKey: the PublicKey used to carry out the verification.
sigProvider	String: the name of the signature provider.

Throws
NoSuchAlgorithmException	on unsupported signature algorithms.
InvalidKeyException	on incorrect key.
NoSuchProviderException	on incorrect provider.
SignatureException	on signature errors.
CRLException	on encoding errors.