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
21extern u32 chap_main_loop(struct iscsi_conn *, struct iscsi_node_auth *, char *, char *,
22				int *, int *);
23
24struct 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