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nvmet-auth: update sc_c in host response

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The target code should set the sc_c bit in calculating the host response
based on the status of the 'concat' setting, otherwise we'll get an
authentication mismatch for hosts setting that bit correctly.

Fixes: 7e091add9c ("nvme-auth: update sc_c in host response")
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Hannes Reinecke 2025-10-22 09:59:24 +02:00 committed by Keith Busch
parent 4c8cf6bd28
commit 60ad1de8e5
1 changed files with 3 additions and 2 deletions
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5
drivers/nvme/target/auth.c
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@ -298,7 +298,7 @@ int nvmet_auth_host_hash(struct nvmet_req *req, u8 *response,
const char *hash_name;
u8 *challenge = req->sq->dhchap_c1;
struct nvme_dhchap_key *transformed_key;
u8 buf[4];
u8 buf[4], sc_c = ctrl->concat ? 1 : 0;
int ret;
hash_name = nvme_auth_hmac_name(ctrl->shash_id);
@ -367,13 +367,14 @@ int nvmet_auth_host_hash(struct nvmet_req *req, u8 *response,
ret = crypto_shash_update(shash, buf, 2);
if (ret)
goto out;
memset(buf, 0, 4);
*buf = sc_c;
ret = crypto_shash_update(shash, buf, 1);
if (ret)
goto out;
ret = crypto_shash_update(shash, "HostHost", 8);
if (ret)
goto out;
memset(buf, 0, 4);
ret = crypto_shash_update(shash, ctrl->hostnqn, strlen(ctrl->hostnqn));
if (ret)
goto out;