chap.h
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- /*****************************************************************************
- * 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 */