/***************************************************************************** * 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 * Ported to lwIP. * 97-12-03 Guy Lancaster , 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 1.1.2.1 2003/06/04 17:00:46 likewise 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 */