com.netscape.sasl.mechanisms
Class SaslExternal

java.lang.Object
  com.netscape.sasl.mechanisms.SaslExternal

All Implemented Interfaces:

SaslClient

public class SaslExternal

extends Object

implements SaslClient

This class provides the implementation of the EXTERNAL mechanism driver. This mechanism is passed in the SASL External bind request to retrieve the current result code from the server.

Constructor Summary

SaslExternal()
Default constructor

Method Summary

byte[]	createInitialResponse() Retrieves the initial response.
byte[]	evaluateChallenge(byte[] challenge) Evaluates the challenge data and generates a response.
InputStream	getInputStream(InputStream is) Retrieves an input stream for the session.
String	getMechanismName() Returns the name of mechanism driver.
OutputStream	getOutputStream(OutputStream os) Retrieves an output stream for the session.
boolean	isComplete() The method may be called at any time to determine if the authentication process is finished.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SaslExternal

public SaslExternal()

Default constructor

Method Detail

createInitialResponse

public byte[] createInitialResponse()
                             throws SaslException

Retrieves the initial response.

Specified by:

createInitialResponse in interface SaslClient

Returns:

The possibly null byte array containing the initial response. It is null if the mechanism does not have an initial response.

Throws:

SaslException - If an error occurred while creating the initial response.

evaluateChallenge

public byte[] evaluateChallenge(byte[] challenge)
                         throws SaslException

Evaluates the challenge data and generates a response.

Specified by:

evaluateChallenge in interface SaslClient

Parameters:

challenge - The non-null challenge sent from the server.

Returns:

The possibly null reponse to send to the server. It is null if the challenge accompanied a "SUCCESS" status and the challenge only contains data for the client to update its state and no response needs to be sent to the server.

Throws:

SaslException - If an error occurred while processing the challenge or generating a response.

getMechanismName

public String getMechanismName()

Returns the name of mechanism driver.

Specified by:

getMechanismName in interface SaslClient

Returns:

The mechanism name.

isComplete

public boolean isComplete()

The method may be called at any time to determine if the authentication process is finished.

Specified by:

isComplete in interface SaslClient

Returns:

true if authentication is complete. For this class, always returns true.

getInputStream

public InputStream getInputStream(InputStream is)
                           throws IOException

Retrieves an input stream for the session. It may return the same stream that is passed in, if no processing is to be done by the client object. This method can only be called if isComplete() returns true.

Specified by:

getInputStream in interface SaslClient

Parameters:

is - The original input stream for reading from the server.

Returns:

An input stream for reading from the server, which may include processing the original stream. For this class, the input parameter is always returned.

Throws:

IOException - If the authentication exchange has not completed or an error occurred while getting the stream.

getOutputStream

public OutputStream getOutputStream(OutputStream os)
                             throws IOException

Retrieves an output stream for the session. It may return the same stream that is passed in, if no processing is to be done by the client object. This method can only be called if isComplete() returns true.

Specified by:

getOutputStream in interface SaslClient

Parameters:

os - The original output stream for writing to the server.

Returns:

An output stream for writing to the server, which may include processing the original stream. For this class, the input parameter is always returned.

Throws:

IOException - If the authentication exchange has not completed or an error occurred while getting the stream.