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nvme: implement In-Band authentication

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Implement NVMe-oF In-Band authentication according to NVMe TPAR 8006.
This patch adds two new fabric options 'dhchap_secret' to specify the
pre-shared key (in ASCII respresentation according to NVMe 2.0 section
8.13.5.8 'Secret representation') and 'dhchap_ctrl_secret' to specify
the pre-shared controller key for bi-directional authentication of both
the host and the controller.
Re-authentication can be triggered by writing the PSK into the new
controller sysfs attribute 'dhchap_secret' or 'dhchap_ctrl_secret'.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
[axboe: fold in clang build fix]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Hannes Reinecke
2022-06-27 11:52:02 +02:00
committed by Jens Axboe
parent 3bf2fde6fc
commit f50fff73d6
16 changed files with 1498 additions and 7 deletions
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33
include/linux/nvme-auth.h Normal file
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2021 Hannes Reinecke, SUSE Software Solutions
*/
#ifndef _NVME_AUTH_H
#define _NVME_AUTH_H
#include <crypto/kpp.h>
struct nvme_dhchap_key {
u8 *key;
size_t len;
u8 hash;
};
u32 nvme_auth_get_seqnum(void);
const char *nvme_auth_dhgroup_name(u8 dhgroup_id);
const char *nvme_auth_dhgroup_kpp(u8 dhgroup_id);
u8 nvme_auth_dhgroup_id(const char *dhgroup_name);
const char *nvme_auth_hmac_name(u8 hmac_id);
const char *nvme_auth_digest_name(u8 hmac_id);
size_t nvme_auth_hmac_hash_len(u8 hmac_id);
u8 nvme_auth_hmac_id(const char *hmac_name);
struct nvme_dhchap_key *nvme_auth_extract_key(unsigned char *secret,
u8 key_hash);
void nvme_auth_free_key(struct nvme_dhchap_key *key);
u8 *nvme_auth_transform_key(struct nvme_dhchap_key *key, char *nqn);
int nvme_auth_generate_key(u8 *secret, struct nvme_dhchap_key **ret_key);
#endif /* _NVME_AUTH_H */