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