xauth.h

This a good VPN source

/* 
 * Copyright (C) 2001-2002 Colubris Networks
 * Copyright (C) 2003-2004 Xelerance Corporation
 * 
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
 *
 * 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 General Public License
 * for more details.
 *
 * RCSID $Id: xauth.h,v 1.8 2004/10/22 19:34:43 mcr Exp $
 */

struct state;

stf_status modecfg_resp(struct state *st,unsigned int resp
			, pb_stream *s, u_int16_t cmd
			, bool hackthat, u_int16_t id);

stf_status xauth_client_resp(struct state *st
                             ,unsigned int xauth
                             ,pb_stream *rbody
                             ,u_int16_t ap_id);

stf_status xauth_client_ackstatus(struct state *st
                             ,pb_stream *rbody
                             ,u_int16_t ap_id);

stf_status modecfg_send_set(struct state *st);

size_t xauth_mode_cfg_hash(u_char *dest
                             ,const u_char *start
                             ,const u_char *roof
                             ,const struct state *st);

stf_status xauth_send_request(struct state *st);

stf_status xauth_send_status(struct state *st,int status);

int xauth_launch_authent(struct state *st,chunk_t name
			 ,chunk_t password, chunk_t connname); 

extern stf_status modecfg_start_set(struct state *st);


/* XAUTH States */
extern stf_status xauth_inR0(struct msg_digest *md);
extern stf_status xauth_inR1(struct msg_digest *md);
extern stf_status modecfg_inR0(struct msg_digest *md);
extern stf_status modecfg_inR1(struct msg_digest *md);
extern stf_status xauth_inI0(struct msg_digest *md);
extern stf_status xauth_inI1(struct msg_digest *md);
extern oakley_auth_t xauth_calcbaseauth(oakley_auth_t baseauth);
extern stf_status modecfg_send_request(struct state *st);

/* How many times can remote users try to login ? */
#define XAUTH_PROMPT_TRIES 3