NetBSD/usr.sbin/pppd/chap.h

112 lines
3.8 KiB
C
Raw Normal View History

1993-08-14 10:29:28 +04:00
/*
* chap.h - Cryptographic Handshake Authentication Protocol definitions.
* based on November 1991 draft of PPP Authentication RFC
*
* 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 1.3 1993/11/10 01:34:02 paulus Exp $
1993-08-14 10:29:28 +04:00
*/
#ifndef __CHAP_INCLUDE__
/* Code + ID + length */
#define CHAP_HEADERLEN (sizeof (u_char) + sizeof (u_char) + sizeof (u_short))
/*
* CHAP codes.
*/
#define CHAP_DIGEST_MD5 5 /* use MD5 algorithm */
#define MD5_SIGNATURE_SIZE 16 /* 16 bytes in a MD5 message digest */
1993-08-14 10:29:28 +04:00
#define CHAP_CHALLENGE 1
#define CHAP_RESPONSE 2
#define CHAP_SUCCESS 3
#define CHAP_FAILURE 4
1993-08-14 10:29:28 +04:00
/*
* Challenge lengths (for challenges we send) and other limits.
1993-08-14 10:29:28 +04:00
*/
#define MIN_CHALLENGE_LENGTH 32
#define MAX_CHALLENGE_LENGTH 64
#define MAX_RESPONSE_LENGTH 16 /* sufficient for MD5 */
1993-08-14 10:29:28 +04:00
/*
* Each interface is described by a chap structure.
1993-08-14 10:29:28 +04:00
*/
typedef struct chap_state {
int unit; /* Interface unit number */
1993-08-14 10:29:28 +04:00
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 */
1993-08-14 10:29:28 +04:00
} chap_state;
/*
* Client (peer) states.
1993-08-14 10:29:28 +04:00
*/
#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 */
1993-08-14 10:29:28 +04:00
/*
* Server (authenticator) states.
1993-08-14 10:29:28 +04:00
*/
#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 */
1993-08-14 10:29:28 +04:00
/*
* Timeouts.
*/
#define CHAP_DEFTIMEOUT 3 /* Timeout time in seconds */
#define CHAP_DEFTRANSMITS 10 /* max # times to send challenge */
1993-08-14 10:29:28 +04:00
extern chap_state chap[];
void ChapInit __ARGS((int));
void ChapAuthWithPeer __ARGS((int, char *, int));
void ChapAuthPeer __ARGS((int, char *, int));
1993-08-14 10:29:28 +04:00
void ChapLowerUp __ARGS((int));
void ChapLowerDown __ARGS((int));
void ChapInput __ARGS((int, u_char *, int));
void ChapProtocolReject __ARGS((int));
#define __CHAP_INCLUDE__
#endif /* __CHAP_INCLUDE__ */