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_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_ ***/