1 #ifndef _ISCSI_CHAP_H_
2 #define _ISCSI_CHAP_H_
3 
4 #define CHAP_DIGEST_UNKNOWN	0
5 #define CHAP_DIGEST_MD5		5
6 #define CHAP_DIGEST_SHA		6
7 
8 #define CHAP_CHALLENGE_LENGTH	16
9 #define CHAP_CHALLENGE_STR_LEN	4096
10 #define MAX_RESPONSE_LENGTH	64	/* sufficient for MD5 */
11 #define	MAX_CHAP_N_SIZE		512
12 
13 #define MD5_SIGNATURE_SIZE	16	/* 16 bytes in a MD5 message digest */
14 
15 #define CHAP_STAGE_CLIENT_A	1
16 #define CHAP_STAGE_SERVER_AIC	2
17 #define CHAP_STAGE_CLIENT_NR	3
18 #define CHAP_STAGE_CLIENT_NRIC	4
19 #define CHAP_STAGE_SERVER_NR	5
20 
21 extern u32 chap_main_loop(struct iscsi_conn *, struct iscsi_node_auth *, char *, char *,
22 				int *, int *);
23 
24 struct iscsi_chap {
25 	unsigned char	digest_type;
26 	unsigned char	id;
27 	unsigned char	challenge[CHAP_CHALLENGE_LENGTH];
28 	unsigned int	authenticate_target;
29 	unsigned int	chap_state;
30 } ____cacheline_aligned;
31 
32 #endif   /*** _ISCSI_CHAP_H_ ***/
33