/*
 * Copyright (c) 2011, Florian Zeitz <florob@babelmonkeys.de>
 * Copyright (c) 2016, Jonathan Schleifer <js@heap.zone>
 *
 * https://heap.zone/objxmpp/
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice is present in all copies.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#import <ObjFW/ObjFW.h>

OF_ASSUME_NONNULL_BEGIN

/**
 * \brief A base class for classes implementing authentication mechanisms
 */
@interface XMPPAuthenticator: OFObject
{
	OFString *_authzid, *_authcid, *_password;
}

/// \brief The authzid to get authorization for
@property OF_NULLABLE_PROPERTY (nonatomic, copy) OFString *authzid;
/// \brief The authcid to authenticate with
@property OF_NULLABLE_PROPERTY (nonatomic, copy) OFString *authcid;
/// \brief The password to authenticate with
@property OF_NULLABLE_PROPERTY (nonatomic, copy) OFString *password;

/**
 * \brief Initializes an already allocated XMPPAuthenticator with an authcid
 *	  and password.
 *
 * \param authcid The authcid to authenticate with
 * \param password The password to authenticate with
 * \return A initialized XMPPAuthenticator
 */
- initWithAuthcid: (nullable OFString *)authcid
	 password: (nullable OFString *)password;

/**
 * \brief Initializes an already allocated XMPPSCRAMAuthenticator with an
 *	  authzid, authcid and password.
 *
 * \param authzid The authzid to get authorization for
 * \param authcid The authcid to authenticate with
 * \param password The password to authenticate with
 * \return A initialized XMPPAuthenticator
 */
- initWithAuthzid: (nullable OFString *)authzid
	  authcid: (nullable OFString *)authcid
	 password: (nullable OFString *)password OF_DESIGNATED_INITIALIZER;

/**
 * \brief Returns an OFDataArray containing the initial authentication message.
 *
 * \return An OFDataAray containing the initial authentication message
 */
- (OFDataArray *)initialMessage;

/**
 * \brief Continue authentication with the specified data.
 *
 * \param data The continuation data send by the server
 * \return The appropriate response if the data was a challenge, nil otherwise
 */
- (nullable OFDataArray *)continueWithData: (OFDataArray *)data;
@end

OF_ASSUME_NONNULL_END