Class SaslServerPlainImpl

  • All Implemented Interfaces:
    SaslServer

    public class SaslServerPlainImpl
    extends Object
    implements SaslServer
    Implements the PLAIN server-side mechanism. (RFC 4616)

    client ----- {authzid, authcid, password} -----> server

    Each paramater sent to the server is seperated by a null character The authorization ID (authzid) may be empty.
    Author:
    Jay Kline
    • Method Detail

      • getMechanismName

        public String getMechanismName()
        Returns the IANA-registered mechanism name of this SASL server. ("PLAIN").
        Specified by:
        getMechanismName in interface SaslServer
        Returns:
        A non-null string representing the IANA-registered mechanism name.
      • evaluateResponse

        public byte[] evaluateResponse​(byte[] response)
                                throws SaslException
        Evaluates the response data and generates a challenge. If a response is received from the client during the authentication process, this method is called to prepare an appropriate next challenge to submit to the client. The challenge is null if the authentication has succeeded and no more challenge data is to be sent to the client. It is non-null if the authentication must be continued by sending a challenge to the client, or if the authentication has succeeded but challenge data needs to be processed by the client. isComplete() should be called after each call to evaluateResponse(),to determine if any further response is needed from the client.
        Specified by:
        evaluateResponse in interface SaslServer
        Parameters:
        response - The non-null (but possibly empty) response sent by the client.
        Returns:
        The possibly null challenge to send to the client. It is null if the authentication has succeeded and there is no more challenge data to be sent to the client.
        Throws:
        SaslException - If an error occurred while processing the response or generating a challenge.
      • isComplete

        public boolean isComplete()
        Determines whether the authentication exchange has completed. This method is typically called after each invocation of evaluateResponse() to determine whether the authentication has completed successfully or should be continued.
        Specified by:
        isComplete in interface SaslServer
        Returns:
        true if the authentication exchange has completed; false otherwise.
      • getAuthorizationID

        public String getAuthorizationID()
        Reports the authorization ID in effect for the client of this session. This method can only be called if isComplete() returns true.
        Specified by:
        getAuthorizationID in interface SaslServer
        Returns:
        The authorization ID of the client.
        Throws:
        IllegalStateException - if this authentication session has not completed
      • unwrap

        public byte[] unwrap​(byte[] incoming,
                             int offset,
                             int len)
                      throws SaslException
        Unwraps a byte array received from the client. PLAIN supports no security layer.
        Specified by:
        unwrap in interface SaslServer
        Throws:
        SaslException - if attempted to use this method.
      • wrap

        public byte[] wrap​(byte[] outgoing,
                           int offset,
                           int len)
                    throws SaslException
        Wraps a byte array to be sent to the client. PLAIN supports no security layer.
        Specified by:
        wrap in interface SaslServer
        Throws:
        SaslException - if attempted to use this method.
      • getNegotiatedProperty

        public Object getNegotiatedProperty​(String propName)
        Retrieves the negotiated property. This method can be called only after the authentication exchange has completed (i.e., when isComplete() returns true); otherwise, an IllegalStateException is thrown.
        Specified by:
        getNegotiatedProperty in interface SaslServer
        Parameters:
        propName - the property
        Returns:
        The value of the negotiated property. If null, the property was not negotiated or is not applicable to this mechanism.
        Throws:
        IllegalStateException - if this authentication exchange has not completed
      • dispose

        public void dispose()
                     throws SaslException
        Disposes of any system resources or security-sensitive information the SaslServer might be using. Invoking this method invalidates the SaslServer instance. This method is idempotent.
        Specified by:
        dispose in interface SaslServer
        Throws:
        SaslException - If a problem was encountered while disposing the resources.