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