/***************************************************************************** | |
* 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 1.4 2007/12/19 20:47:22 fbernon 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 */ |