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nvme-auth: target: remove obsolete crypto_has_shash() checks

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Since nvme-auth is now doing its HMAC computations using the crypto
library, it's guaranteed that all the algorithms actually work.
Therefore, remove the crypto_has_shash() checks which are now obsolete.

However, the caller in nvmet_auth_negotiate() seems to have also been
relying on crypto_has_shash(nvme_auth_hmac_name(host_hmac_id)) to
validate the host_hmac_id.  Therefore, make it validate the ID more
directly by checking whether nvme_auth_hmac_hash_len() returns 0 or not.

Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Eric Biggers
2026-03-01 23:59:54 -08:00
committed by Keith Busch
parent ac9a49cf6e
commit efe8df9f9c
3 changed files with 1 additions and 15 deletions
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9
drivers/nvme/target/auth.c
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@@ -45,15 +45,6 @@ int nvmet_auth_set_key(struct nvmet_host *host, const char *secret,
key_hash);
return -EINVAL;
}
if (key_hash > 0) {
/* Validate selected hash algorithm */
const char *hmac = nvme_auth_hmac_name(key_hash);
if (!crypto_has_shash(hmac, 0, 0)) {
pr_err("DH-HMAC-CHAP hash %s unsupported\n", hmac);
return -ENOTSUPP;
}
}
dhchap_secret = kstrdup(secret, GFP_KERNEL);
if (!dhchap_secret)
return -ENOMEM;