mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
113 lines
3.7 KiB
C
113 lines
3.7 KiB
C
/*
|
|
* chap.h - Cryptographic Handshake Authentication Protocol definitions.
|
|
*
|
|
* 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.
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
#ifndef __CHAP_INCLUDE__
|
|
|
|
/* 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_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 16 /* sufficient for MD5 */
|
|
|
|
/*
|
|
* 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;
|
|
|
|
|
|
/*
|
|
* 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 */
|
|
|
|
/*
|
|
* Timeouts.
|
|
*/
|
|
#define CHAP_DEFTIMEOUT 3 /* Timeout time in seconds */
|
|
#define CHAP_DEFTRANSMITS 10 /* max # times to send challenge */
|
|
|
|
extern chap_state chap[];
|
|
|
|
void ChapInit __P((int));
|
|
void ChapAuthWithPeer __P((int, char *, int));
|
|
void ChapAuthPeer __P((int, char *, int));
|
|
void ChapLowerUp __P((int));
|
|
void ChapLowerDown __P((int));
|
|
void ChapInput __P((int, u_char *, int));
|
|
void ChapProtocolReject __P((int));
|
|
int ChapPrintPkt __P((u_char *, int,
|
|
void (*) __P((void *, char *, ...)), void *));
|
|
|
|
#define __CHAP_INCLUDE__
|
|
#endif /* __CHAP_INCLUDE__ */
|