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/******************************************************
 * File: AuthenticationMethod.java
 *
 *@author M. Ranganathan
 *
 */

package examples.authorization;

import javax.sip.*;
import javax.sip.message.*;
import javax.sip.header.*;
import javax.sip.address.*;

public interface AuthenticationMethod {

	/**
	 * Get the authentication scheme
	 */
	public String getScheme();

	/**
	 * Initialize the authentication method. This has to be done outside the
	 * constructor as the constructor is generic (created from the class name
	 * specified in the authentication method).
	 */
	public void initialize();

	/**
	 * Get the authentication realm.
	 */
	public String getRealm(String resource);

	/**
	 * get the authentication domain.
	 */
	public String getDomain();

	/**
	 * Get the authentication Algorithm
	 */
	public String getAlgorithm();

	/**
	 * Generate the challenge string.
	 */
	public String generateNonce();

	/**
	 * Check the response and answer true if authentication succeeds. Not all of
	 * these fields are relevant for every method - a basic scheme may simply do
	 * a username password check.
	 * 
	 * @param username
	 *            is the username and password.
	 * @param authorizationHeader
	 *            is the authorization header from the SIP request.
	 * @param requestLine
	 *            is the RequestLine from the SIP Request.
	 */
	public boolean doAuthenticate(String username,
			AuthorizationHeader authorizationHeader, Request request);

}