iaik.x509.extensions
Class CertificateIssuer

java.lang.Object
  |
  +--iaik.x509.V3Extension
        |
        +--iaik.x509.extensions.CertificateIssuer

public class CertificateIssuer

extends V3Extension

This class implements the CertificateIssuer extension. The CertificateIssuer extension is a critical standard X509v2 CRL entry extension.

Each extension is associated with a specific certificateExtension object identifier, derived from:

 certificateExtension  OBJECT IDENTIFIER ::=
                            {joint-iso-ccitt(2) ds(5) 29}
 id-ce                 OBJECT IDENTIFIER ::=  certificateExtension
 

The object identifier for the CRLNumber extension is defined as:

id-ce-cRLReason OBJECT IDENTIFIER ::= { id-ce 29 }

which corresponds to the OID string "2.5.29.29".

The X.509 Certificate and CRL profile presented in RFC 2459 specifies the CertifcateIssuer extension for identifying the certificate issuer associated with an entry in an indirect CRL, i.e. a CRL that has the indirectCRL indicator set in its issuing distribution point extension. If this extension is not present on the first entry in an indirect CRL, the certificate issuer defaults to the CRL issuer. On subsequent entries in an indirect CRL, if this extension is not present, the certificate issuer for the entry is the same as that for the preceding entry.

ASN.1 definition:

 CertificateIssuer ::= GeneralNames
 

Since in the IAIK-JCE environment revoked certificates are implementations of the iaik.x509.RevokedCertificate class, a InvalidityData CRL entry extension may be added to a revoked certificate by using the addExtension method of the iaik.x509.RevokedCertificate class. Any revoked certificate itself is added to a certificate revocation list by using a proper addCertificate method of the iaik.x509.X509CRL class, e.g.:

 //Create a revoked certificate from a X509Certificate and set the revocation date
 //to the current date; the X509Certificate is read in from a file:
 GregorianCalendar revocationDate = (GregorianCalendar)Calendar.getInstance();
 InputStream fis = new FileInputStream("cert.der");
 X509Certificate cert = new X509Certificate(fis);
 fis.close();
 RevokedCertificate rev_cert = new RevokedCertificate(cert, revocationDate.getTime());
 //add the the certificate issuer:
 GeneralNames issuer = ...;
 CertificateIssuer certificateIssuer = new CertificateIssuer(issuer);
 rev_cert.addExtension(certificateIssuer);
 //add the revoked certificate to the crl
 X509CRL crl = new X509CRL();
  ...
 crl.addCertificate(rev_cert);
 

Version:

File Revision 9

See Also:

X509CRL, X509Certificate, RevokedCertificate

Field Summary

static ObjectID

oid The object identifier of this CertificateIssuer extension.

Fields inherited from class iaik.x509.V3Extension

critical

Constructor Summary

CertificateIssuer()
Default constructor.

CertificateIssuer(GeneralNames issuer)
Creates a new CertificateIssuer from the given issuer name.

Method Summary

GeneralNames	getIssuer() Returns the certificate issuer.
ObjectID	getObjectID() Returns the object ID of this CertificateIssuer extension
int	hashCode() Returns a hashcode for this identity.
void	init(ASN1Object obj) Inits this CertificateIssuer implementation with an ASN1object representing the value of this extension.
void	setIssuer(GeneralNames issuer) Sets the issuer of this CertificateIssuer object.
ASN1Object	toASN1Object() Returns an ASN1Object representing the value of this CertificateIssuer extension object.
String	toString() Returns a string that represents the contents of the CertificateIssuer extension.

Methods inherited from class iaik.x509.V3Extension

getName, isCritical, setCritical

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

oid

public static final ObjectID oid

The object identifier of this CertificateIssuer extension. The corresponding OID string is "2.5.29.29".

Constructor Detail

CertificateIssuer

public CertificateIssuer()

Default constructor.

Creates an empty CertificateIssuer object.

Use setIssuer for specifying the certificate issuer as {iaik.asn1.structures.GeneralNames iaik.asn1.structures.GeneralNames} object, e.g.:

 GeneralNames issuer = new GeneralNames();
 CertificateIssuer certIssuer = new CertificateIssuer();
 certIssuer.setIssuer(issuer);
 

CertificateIssuer

public CertificateIssuer(GeneralNames issuer)

Creates a new CertificateIssuer from the given issuer name.

For instance:

 GeneralNames issuer = ...;
 CertificateIssuer certificateIssuer = new CertificateIssuer(issuer);
 

Parameters:

issuer - the certificate issuer to be set

Method Detail

getObjectID

public ObjectID getObjectID()

Returns the object ID of this CertificateIssuer extension

Overrides:

getObjectID in class V3Extension

Returns:

the object ID

init

public void init(ASN1Object obj)
          throws X509ExtensionException

Inits this CertificateIssuer implementation with an ASN1object representing the value of this extension.

The given ASN1Object represents a GeneralNames giving the certificate issuer.

The given ASN1Object is the one created by toASN1Object().

This method is used by the X509Extensions class when parsing the ASN.1 representation of a CRL for properly initializing an included CertificateIssuer extension. This method initializes the extension only with its value, but not with its critical specification. For that reason, this method shall not be explicitly called by an application.

Overrides:

init in class V3Extension

Parameters:

obj - the CertificateIssuer as ASN1Object

Throws:

X509ExtensionException - if the extension cannot be init

toASN1Object

public ASN1Object toASN1Object()
                        throws X509ExtensionException

Returns an ASN1Object representing the value of this CertificateIssuer extension object.

The returned ASN1Object is an ASN.1 GeneralNames representing the certificate issuer:

 certificateIssuer ::= GeneralNames
 

Overrides:

toASN1Object in class V3Extension

Returns:

the value of this CertificateIssuer as ASN1Object

Throws:

X509ExtensionException - if an error occurs when parsing the supplied ASN.1 object

setIssuer

public void setIssuer(GeneralNames issuer)

Sets the issuer of this CertificateIssuer object.

For instance:

 CertificateIssuer certificateIssuer = new CertificateIssuer();
 GeneralNames issuer = ...;
 certificateIssuer.setIssuer(issuer);
 

Parameters:

issuer - the certificate issuer to be set

getIssuer

public GeneralNames getIssuer()

Returns the certificate issuer.

Returns:

the certificate issuer

hashCode

public int hashCode()

Returns a hashcode for this identity.

Overrides:

hashCode in class V3Extension

Returns:

a hash code for this identity

toString

public String toString()

Returns a string that represents the contents of the CertificateIssuer extension.

Overrides:

toString in class Object

Returns:

the string representation