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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_SHA1 6
#define CHAP_DIGEST_SHA256 7
#define CHAP_DIGEST_SHA3_256 8
#define MAX_CHAP_CHALLENGE_LEN 32
#define CHAP_CHALLENGE_STR_LEN 4096
#define MAX_RESPONSE_LENGTH 128 /* sufficient for SHA3 256 */
#define MAX_CHAP_N_SIZE 512
#define MD5_SIGNATURE_SIZE 16 /* 16 bytes in a MD5 message digest */
#define SHA1_SIGNATURE_SIZE 20 /* 20 bytes in a SHA1 message digest */
#define SHA256_SIGNATURE_SIZE 32 /* 32 bytes in a SHA256 message digest */
#define SHA3_256_SIGNATURE_SIZE 32 /* 32 bytes in a SHA3 256 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 id;
unsigned char challenge[MAX_CHAP_CHALLENGE_LEN];
unsigned int challenge_len;
unsigned char *digest_name;
unsigned int digest_size;
unsigned int authenticate_target;
unsigned int chap_state;
} ____cacheline_aligned;
#endif /*** _ISCSI_CHAP_H_ ***/
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