sun.security.x509

Class SubjectKeyIdentifierExtension

java.lang.Object

sun.security.x509.Extension

sun.security.x509.SubjectKeyIdentifierExtension

All Implemented Interfaces:

CertAttrSet<java.lang.String>

public class SubjectKeyIdentifierExtension
extends Extension
implements CertAttrSet<java.lang.String>

Represent the Subject Key Identifier Extension. This extension, if present, provides a means of identifying the particular public key used in an application. This extension by default is marked non-critical.

Extensions are addiitonal attributes which can be inserted in a X509 v3 certificate. For example a "Driving License Certificate" could have the driving license number as a extension.

Extensions are represented as a sequence of the extension identifier (Object Identifier), a boolean flag stating whether the extension is to be treated as being critical and the extension value itself (this is again a DER encoding of the extension value).

Author:

Amit Kapoor, Hemma Prafullchandra

See Also:

Extension, CertAttrSet

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	IDENT Identifier for this attribute, to be used with the get, set, delete methods of Certificate, x509 type.
static java.lang.String	KEY_ID
static java.lang.String	NAME Attribute names.

Fields inherited from class sun.security.x509.Extension

critical, extensionId, extensionValue

Constructor Summary

Constructors

Constructor and Description
SubjectKeyIdentifierExtension(java.lang.Boolean critical, java.lang.Object value) Create the extension from the passed DER encoded value.
SubjectKeyIdentifierExtension(byte[] octetString) Create a SubjectKeyIdentifierExtension with the passed octet string.

Method Summary

Methods

Modifier and Type	Method and Description
void	delete(java.lang.String name) Delete the attribute value.
void	encode(java.io.OutputStream out) Write the extension to the OutputStream.
java.lang.Object	get(java.lang.String name) Get the attribute value.
java.util.Enumeration<java.lang.String>	getElements() Return an enumeration of names of attributes existing within this attribute.
java.lang.String	getName() Return the name of this attribute.
void	set(java.lang.String name, java.lang.Object obj) Set the attribute value.
java.lang.String	toString() Returns a printable representation.

Methods inherited from class sun.security.x509.Extension

encode, equals, getExtensionId, getExtensionValue, hashCode, isCritical

Methods inherited from class java.lang.Object

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

Field Detail

IDENT

public static final java.lang.String IDENT

Identifier for this attribute, to be used with the get, set, delete methods of Certificate, x509 type.

See Also:

Constant Field Values

NAME

public static final java.lang.String NAME

Attribute names.

See Also:

Constant Field Values

KEY_ID

public static final java.lang.String KEY_ID

See Also:

Constant Field Values

Constructor Detail

SubjectKeyIdentifierExtension

public SubjectKeyIdentifierExtension(byte[] octetString)
                              throws java.io.IOException

Create a SubjectKeyIdentifierExtension with the passed octet string. The criticality is set to False.

Parameters:

octetString - the octet string identifying the key identifier.

Throws:

java.io.IOException

SubjectKeyIdentifierExtension

public SubjectKeyIdentifierExtension(java.lang.Boolean critical,
                             java.lang.Object value)
                              throws java.io.IOException

Create the extension from the passed DER encoded value.

Parameters:

critical - true if the extension is to be treated as critical.

value - an array of DER encoded bytes of the actual value.

Throws:

java.lang.ClassCastException - if value is not an array of bytes

java.io.IOException - on error.

Method Detail

toString

public java.lang.String toString()

Returns a printable representation.

Specified by:

toString in interface CertAttrSet<java.lang.String>

Overrides:

toString in class Extension

Returns:

value of this certificate attribute in printable form.

encode

public void encode(java.io.OutputStream out)
            throws java.io.IOException

Write the extension to the OutputStream.

Specified by:

encode in interface CertAttrSet<java.lang.String>

Parameters:

out - the OutputStream to write the extension to.

Throws:

java.io.IOException - on encoding errors.

set

public void set(java.lang.String name,
       java.lang.Object obj)
         throws java.io.IOException

Set the attribute value.

Specified by:

set in interface CertAttrSet<java.lang.String>

Parameters:

name - the name of the attribute (e.g. "x509.info.key")

obj - the attribute object.

Throws:

java.io.IOException - on other errors.

get

public java.lang.Object get(java.lang.String name)
                     throws java.io.IOException

Get the attribute value.

Specified by:

get in interface CertAttrSet<java.lang.String>

Parameters:

name - the name of the attribute to return.

Throws:

java.io.IOException - on other errors.

delete

public void delete(java.lang.String name)
            throws java.io.IOException

Delete the attribute value.

Specified by:

delete in interface CertAttrSet<java.lang.String>

Parameters:

name - the name of the attribute to delete.

Throws:

java.io.IOException - on other errors.

getElements

public java.util.Enumeration<java.lang.String> getElements()

Return an enumeration of names of attributes existing within this attribute.

Specified by:

getElements in interface CertAttrSet<java.lang.String>

Returns:

an enumeration of the attribute names.

getName

public java.lang.String getName()

Return the name of this attribute.

Specified by:

getName in interface CertAttrSet<java.lang.String>

Returns:

the name of this CertAttrSet.