107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#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 */
|
|
|
|
#define CHAP_NOCALLBACK 0 /* don't call back after successful auth */
|
|
#define CHAP_CALLBACK 1 /* do call back */
|
|
|
|
#define CHAP_CHALLENGE 1
|
|
#define CHAP_RESPONSE 2
|
|
#define CHAP_SUCCESS 3
|
|
#define CHAP_FAILURE 4
|
|
|
|
/*
|
|
* Challenge lengths
|
|
*/
|
|
|
|
#define MIN_CHALLENGE_LENGTH 64
|
|
#define MAX_CHALLENGE_LENGTH 128
|
|
|
|
#define MAX_SECRET_LEN 128
|
|
/*
|
|
* Each interface is described by chap structure.
|
|
*/
|
|
|
|
typedef struct chap_state {
|
|
int unit; /* Interface unit number */
|
|
u_char chal_str[MAX_CHALLENGE_LENGTH + 1]; /* challenge string */
|
|
u_char chal_len; /* challenge length */
|
|
int clientstate; /* Client state */
|
|
int serverstate; /* Server state */
|
|
int flags; /* Flags */
|
|
unsigned char id; /* Current id */
|
|
int timeouttime; /* Timeout time in milliseconds */
|
|
int retransmits; /* Number of retransmissions */
|
|
} chap_state;
|
|
|
|
|
|
/*
|
|
* Client states.
|
|
*/
|
|
#define CHAPCS_CLOSED 1 /* Connection down */
|
|
#define CHAPCS_CHALLENGE_SENT 2 /* We've sent a challenge */
|
|
#define CHAPCS_OPEN 3 /* We've received an Ack */
|
|
|
|
/*
|
|
* Server states.
|
|
*/
|
|
#define CHAPSS_CLOSED 1 /* Connection down */
|
|
#define CHAPSS_LISTEN 2 /* Listening for a challenge */
|
|
#define CHAPSS_OPEN 3 /* We've sent an Ack */
|
|
|
|
/*
|
|
* Flags.
|
|
*/
|
|
#define CHAPF_LOWERUP 0x01 /* The lower level is UP */
|
|
#define CHAPF_AWPPENDING 0x02 /* Auth with peer pending */
|
|
#define CHAPF_APPENDING 0x04 /* Auth peer pending */
|
|
#define CHAPF_UPVALID 0x08 /* values valid */
|
|
#define CHAPF_UPPENDING 0x10 /* values pending */
|
|
|
|
|
|
/*
|
|
* Timeouts.
|
|
*/
|
|
#define CHAP_DEFTIMEOUT 3 /* Timeout time in seconds */
|
|
|
|
extern chap_state chap[];
|
|
|
|
void ChapInit __ARGS((int));
|
|
void ChapAuthWithPeer __ARGS((int));
|
|
void ChapAuthPeer __ARGS((int));
|
|
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__ */
|