com.ibm.security12.sun.security.x509
Class SubjectKeyIdentifierExtension

java.lang.Object
  |
  +--com.ibm.security12.sun.security.x509.Extension
        |
        +--com.ibm.security12.sun.security.x509.SubjectKeyIdentifierExtension

public class SubjectKeyIdentifierExtension
extends Extension
implements CertAttrSet

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).

Version:
1.10
Author:
Amit Kapoor, Hemma Prafullchandra
See Also:
Extension, CertAttrSet

Field Summary
static String IDENT
          Identifier for this attribute, to be used with the get, set, delete methods of Certificate, x509 type.
static String KEY_ID
           
static String NAME
          Attribute names.
 
Fields inherited from class com.ibm.security12.sun.security.x509.Extension
critical, extensionId, extensionValue
 
Constructor Summary
SubjectKeyIdentifierExtension(Boolean critical, Object value)
          Create the extension from the passed DER encoded value.
SubjectKeyIdentifierExtension(byte[] octetString)
          Create a SubjectKeyIdentifierExtension with the passed octet string.
 
Method Summary
 void decode(InputStream in)
          Decode the extension from the InputStream.
 void delete(String name)
          Delete the attribute value.
 void encode(OutputStream out)
          Write the extension to the OutputStream.
 Object get(String name)
          Get the attribute value.
 Enumeration getElements()
          Return an enumeration of names of attributes existing within this attribute.
 String getName()
          Return the name of this attribute.
 void set(String name, Object obj)
          Set the attribute value.
 String toString()
          Returns a printable representation.
 
Methods inherited from class com.ibm.security12.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 String IDENT
Identifier for this attribute, to be used with the get, set, delete methods of Certificate, x509 type.

NAME

public static final String NAME
Attribute names.

KEY_ID

public static final String KEY_ID
Constructor Detail

SubjectKeyIdentifierExtension

public SubjectKeyIdentifierExtension(byte[] octetString)
                              throws IOException
Create a SubjectKeyIdentifierExtension with the passed octet string. The criticality is set to False.
Parameters:
octetString - the octet string identifying the key identifier.

SubjectKeyIdentifierExtension

public SubjectKeyIdentifierExtension(Boolean critical,
                                     Object value)
                              throws IOException
Create the extension from the passed DER encoded value.
Parameters:
critical - true if the extension is to be treated as critical.
value - Array of DER encoded bytes of the actual value.
Throws:
IOException - on error.
Method Detail

toString

public String toString()
Returns a printable representation.
Specified by:
toString in interface CertAttrSet
Overrides:
toString in class Extension

encode

public void encode(OutputStream out)
            throws IOException
Write the extension to the OutputStream.
Specified by:
encode in interface CertAttrSet
Parameters:
out - the OutputStream to write the extension to.
Throws:
IOException - on encoding errors.

decode

public void decode(InputStream in)
            throws IOException
Decode the extension from the InputStream.
Specified by:
decode in interface CertAttrSet
Parameters:
in - the InputStream to unmarshal the contents from.
Throws:
IOException - on decoding or validity errors.

set

public void set(String name,
                Object obj)
         throws IOException
Set the attribute value.
Specified by:
set in interface CertAttrSet

get

public Object get(String name)
           throws IOException
Get the attribute value.
Specified by:
get in interface CertAttrSet

delete

public void delete(String name)
            throws IOException
Delete the attribute value.
Specified by:
delete in interface CertAttrSet

getElements

public Enumeration getElements()
Return an enumeration of names of attributes existing within this attribute.
Specified by:
getElements in interface CertAttrSet

getName

public String getName()
Return the name of this attribute.
Specified by:
getName in interface CertAttrSet