1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ISCSI_CHAP_H_ 3 #define _ISCSI_CHAP_H_ 4 5 #include <linux/types.h> 6 7 #define CHAP_DIGEST_UNKNOWN 0 8 #define CHAP_DIGEST_MD5 5 9 #define CHAP_DIGEST_SHA1 6 10 #define CHAP_DIGEST_SHA256 7 11 #define CHAP_DIGEST_SHA3_256 8 12 13 #define MAX_CHAP_CHALLENGE_LEN 32 14 #define CHAP_CHALLENGE_STR_LEN 4096 15 #define MAX_RESPONSE_LENGTH 128 /* sufficient for SHA3 256 */ 16 #define MAX_CHAP_N_SIZE 512 17 18 #define MD5_SIGNATURE_SIZE 16 /* 16 bytes in a MD5 message digest */ 19 #define SHA1_SIGNATURE_SIZE 20 /* 20 bytes in a SHA1 message digest */ 20 #define SHA256_SIGNATURE_SIZE 32 /* 32 bytes in a SHA256 message digest */ 21 #define SHA3_256_SIGNATURE_SIZE 32 /* 32 bytes in a SHA3 256 message digest */ 22 23 #define CHAP_STAGE_CLIENT_A 1 24 #define CHAP_STAGE_SERVER_AIC 2 25 #define CHAP_STAGE_CLIENT_NR 3 26 #define CHAP_STAGE_CLIENT_NRIC 4 27 #define CHAP_STAGE_SERVER_NR 5 28 29 struct iscsi_node_auth; 30 struct iscsi_conn; 31 32 extern u32 chap_main_loop(struct iscsi_conn *, struct iscsi_node_auth *, char *, char *, 33 int *, int *); 34 35 struct iscsi_chap { 36 unsigned char id; 37 unsigned char challenge[MAX_CHAP_CHALLENGE_LEN]; 38 unsigned int challenge_len; 39 unsigned char *digest_name; 40 unsigned int digest_size; 41 unsigned int authenticate_target; 42 unsigned int chap_state; 43 } ____cacheline_aligned; 44 45 #endif /*** _ISCSI_CHAP_H_ ***/ 46