nvme_auth_alloc_key
key = nvme_auth_alloc_key(allocated_len, 0);
EXPORT_SYMBOL_GPL(nvme_auth_alloc_key);
transformed_key = nvme_auth_alloc_key(key_len, key->hash);
struct nvme_dhchap_key *nvme_auth_alloc_key(u32 len, u8 hash);