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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ISCSI_CHAP_H_
#define _ISCSI_CHAP_H_
#include <linux/types.h>
#define CHAP_DIGEST_UNKNOWN 0
#define CHAP_DIGEST_MD5 5
#define CHAP_DIGEST_SHA 6
#define CHAP_CHALLENGE_LENGTH 16
#define CHAP_CHALLENGE_STR_LEN 4096
#define MAX_RESPONSE_LENGTH 64 /* sufficient for MD5 */
#define MAX_CHAP_N_SIZE 512
#define MD5_SIGNATURE_SIZE 16 /* 16 bytes in a MD5 message digest */
#define CHAP_STAGE_CLIENT_A 1
#define CHAP_STAGE_SERVER_AIC 2
#define CHAP_STAGE_CLIENT_NR 3
#define CHAP_STAGE_CLIENT_NRIC 4
#define CHAP_STAGE_SERVER_NR 5
struct iscsi_node_auth;
struct iscsi_conn;
extern u32 chap_main_loop(struct iscsi_conn *, struct iscsi_node_auth *, char *, char *,
int *, int *);
struct iscsi_chap {
unsigned char digest_type;
unsigned char id;
unsigned char challenge[CHAP_CHALLENGE_LENGTH];
unsigned int authenticate_target;
unsigned int chap_state;
} ____cacheline_aligned;
#endif /*** _ISCSI_CHAP_H_ ***/
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