/****************************************************************************** chap.h - Network Challenge Handshake Authentication Protocol header file.** Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.* portions Copyright (c) 1998 Global Election Systems Inc.** The authors hereby grant permission to use, copy, modify, distribute,* and license this software and its documentation for any purpose, provided* that existing copyright notices are retained in all copies and that this* notice and the following disclaimer are included verbatim in any * distributions. No written agreement, license, or royalty fee is required* for any of the authorized uses.** THIS SOFTWARE IS PROVIDED BY THE 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 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.******************************************************************************** REVISION HISTORY** 03-01-01 Marc Boucher <marc@mbsi.ca>*   Ported to lwIP.* 97-12-03 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.*	Original built from BSD network code.******************************************************************************//* * chap.h - Challenge Handshake Authentication Protocol definitions. * * Copyright (c) 1993 The Australian National University. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by the Australian National University.  The name of the University * may not be used to endorse or promote products derived from this * software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * Copyright (c) 1991 Gregory M. Christy * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by the author. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * $Id: chap.h,v 1.1 2003/05/27 14:37:56 jani Exp $ */#ifndef CHAP_H#define CHAP_H/**************************** PUBLIC DEFINITIONS ****************************//* Code + ID + length */#define CHAP_HEADERLEN		4/* * CHAP codes. */#define CHAP_DIGEST_MD5		5	/* use MD5 algorithm */#define MD5_SIGNATURE_SIZE	16	/* 16 bytes in a MD5 message digest */#define CHAP_MICROSOFT		0x80	/* use Microsoft-compatible alg. */#define MS_CHAP_RESPONSE_LEN	49	/* Response length for MS-CHAP */#define CHAP_CHALLENGE		1#define CHAP_RESPONSE		2#define CHAP_SUCCESS		3#define CHAP_FAILURE    	4/* *  Challenge lengths (for challenges we send) and other limits. */#define MIN_CHALLENGE_LENGTH	32#define MAX_CHALLENGE_LENGTH	64#define MAX_RESPONSE_LENGTH	64	/* sufficient for MD5 or MS-CHAP *//* * Client (peer) states. */#define CHAPCS_INITIAL		0	/* Lower layer down, not opened */#define CHAPCS_CLOSED		1	/* Lower layer up, not opened */#define CHAPCS_PENDING		2	/* Auth us to peer when lower up */#define CHAPCS_LISTEN		3	/* Listening for a challenge */#define CHAPCS_RESPONSE		4	/* Sent response, waiting for status */#define CHAPCS_OPEN		5	/* We've received Success *//* * Server (authenticator) states. */#define CHAPSS_INITIAL		0	/* Lower layer down, not opened */#define CHAPSS_CLOSED		1	/* Lower layer up, not opened */#define CHAPSS_PENDING		2	/* Auth peer when lower up */#define CHAPSS_INITIAL_CHAL	3	/* We've sent the first challenge */#define CHAPSS_OPEN		4	/* We've sent a Success msg */#define CHAPSS_RECHALLENGE	5	/* We've sent another challenge */#define CHAPSS_BADAUTH		6	/* We've sent a Failure msg *//*************************** PUBLIC DATA TYPES ***************************//* * Each interface is described by a chap structure. */typedef struct chap_state {    int unit;			/* Interface unit number */    int clientstate;		/* Client state */    int serverstate;		/* Server state */    u_char challenge[MAX_CHALLENGE_LENGTH]; /* last challenge string sent */    u_char chal_len;		/* challenge length */    u_char chal_id;		/* ID of last challenge */    u_char chal_type;		/* hash algorithm for challenges */    u_char id;			/* Current id */    char *chal_name;		/* Our name to use with challenge */    int chal_interval;		/* Time until we challenge peer again */    int timeouttime;		/* Timeout time in seconds */    int max_transmits;		/* Maximum # of challenge transmissions */    int chal_transmits;		/* Number of transmissions of challenge */    int resp_transmits;		/* Number of transmissions of response */    u_char response[MAX_RESPONSE_LENGTH];	/* Response to send */    u_char resp_length;		/* length of response */    u_char resp_id;		/* ID for response messages */    u_char resp_type;		/* hash algorithm for responses */    char *resp_name;		/* Our name to send with response */} chap_state;/********************* PUBLIC DATA *********************/extern chap_state chap[];extern struct protent chap_protent;/************************** PUBLIC FUNCTIONS **************************/void ChapAuthWithPeer (int, char *, int);void ChapAuthPeer (int, char *, int);#endif /* CHAP_H */