/*
* TeleStax, Open Source Cloud Communications
* Copyright 2011-2014, Telestax Inc and individual contributors
* by the @authors tag.
*
* This program is free software: you can redistribute it and/or modify
* under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
package org.restcomm.media.ice;
/**
* Authenticator that verifies the integrity of incoming messages.
*
* @author Henrique Rosa
*
*/
public interface IceAuthenticator {
/**
* Gets the password assigned to a local user.
*
* @param ufrag
* the fragment of the local user
* @return The password of the specified user.<br>
* If the user has no password associated, returns an empty key.<br>
* If the user does not exist, returns null.
*/
public byte[] getLocalKey(String ufrag);
/**
* Gets the password assigned to a remote user.
*
* @param ufrag
* the fragment of the remote user
* @param media
* the name of the target media stream
* @return The password of the specified user.<br>
* If the user has no password associated, returns an empty key.<br>
* If the user or media stream do not exist, returns null.
*/
public byte[] getRemoteKey(String ufrag, String media);
/**
* Verifies whether a local user is registered.
*
* @param ufrag
* the fragment of the local user
* @return true if the user exists, false otherwise.
*/
boolean isUserRegistered(String ufrag);
/**
* Validates the autenticity of a STUN USERNAME attribute.<br>
* The agent MUST consider the username to be valid if it consists of two
* values separated by a colon, where the first value is equal to the
* username fragment generated by the agent in an offer or answer for a
* session in-progress.
*
* @param username The username to be validated
* @return Whether the username is valid or not.
*/
boolean validateUsername(String username);
}