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_SHA 6 10 11 #define CHAP_CHALLENGE_LENGTH 16 12 #define CHAP_CHALLENGE_STR_LEN 4096 13 #define MAX_RESPONSE_LENGTH 64 /* sufficient for MD5 */ 14 #define MAX_CHAP_N_SIZE 512 15 16 #define MD5_SIGNATURE_SIZE 16 /* 16 bytes in a MD5 message digest */ 17 18 #define CHAP_STAGE_CLIENT_A 1 19 #define CHAP_STAGE_SERVER_AIC 2 20 #define CHAP_STAGE_CLIENT_NR 3 21 #define CHAP_STAGE_CLIENT_NRIC 4 22 #define CHAP_STAGE_SERVER_NR 5 23 24 struct iscsi_node_auth; 25 struct iscsi_conn; 26 27 extern u32 chap_main_loop(struct iscsi_conn *, struct iscsi_node_auth *, char *, char *, 28 int *, int *); 29 30 struct iscsi_chap { 31 unsigned char digest_type; 32 unsigned char id; 33 unsigned char challenge[CHAP_CHALLENGE_LENGTH]; 34 unsigned int authenticate_target; 35 unsigned int chap_state; 36 } ____cacheline_aligned; 37 38 #endif /*** _ISCSI_CHAP_H_ ***/ 39