drivers/target/iscsi/iscsi_target_auth.h

   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_ ***/