Lines Matching +full:ctrl +full:- +full:len
1 // SPDX-License-Identifier: GPL-2.0
3 * NVMe over Fabrics DH-HMAC-CHAP authentication.
17 #include <linux/nvme-auth.h>
28 if (sscanf(secret, "DHHC-1:%hhd:%*s", &key_hash) != 1) in nvmet_auth_set_key()
29 return -EINVAL; in nvmet_auth_set_key()
31 pr_warn("Invalid DH-HMAC-CHAP hash id %d\n", in nvmet_auth_set_key()
33 return -EINVAL; in nvmet_auth_set_key()
40 pr_err("DH-HMAC-CHAP hash %s unsupported\n", hmac); in nvmet_auth_set_key()
41 return -ENOTSUPP; in nvmet_auth_set_key()
46 return -ENOMEM; in nvmet_auth_set_key()
48 kfree(host->dhchap_ctrl_secret); in nvmet_auth_set_key()
49 host->dhchap_ctrl_secret = strim(dhchap_secret); in nvmet_auth_set_key()
50 host->dhchap_ctrl_key_hash = key_hash; in nvmet_auth_set_key()
52 kfree(host->dhchap_secret); in nvmet_auth_set_key()
53 host->dhchap_secret = strim(dhchap_secret); in nvmet_auth_set_key()
54 host->dhchap_key_hash = key_hash; in nvmet_auth_set_key()
59 int nvmet_setup_dhgroup(struct nvmet_ctrl *ctrl, u8 dhgroup_id) in nvmet_setup_dhgroup() argument
64 pr_debug("%s: ctrl %d selecting dhgroup %d\n", in nvmet_setup_dhgroup()
65 __func__, ctrl->cntlid, dhgroup_id); in nvmet_setup_dhgroup()
67 if (ctrl->dh_tfm) { in nvmet_setup_dhgroup()
68 if (ctrl->dh_gid == dhgroup_id) { in nvmet_setup_dhgroup()
69 pr_debug("%s: ctrl %d reuse existing DH group %d\n", in nvmet_setup_dhgroup()
70 __func__, ctrl->cntlid, dhgroup_id); in nvmet_setup_dhgroup()
73 crypto_free_kpp(ctrl->dh_tfm); in nvmet_setup_dhgroup()
74 ctrl->dh_tfm = NULL; in nvmet_setup_dhgroup()
75 ctrl->dh_gid = 0; in nvmet_setup_dhgroup()
83 pr_debug("%s: ctrl %d invalid DH group %d\n", in nvmet_setup_dhgroup()
84 __func__, ctrl->cntlid, dhgroup_id); in nvmet_setup_dhgroup()
85 return -EINVAL; in nvmet_setup_dhgroup()
87 ctrl->dh_tfm = crypto_alloc_kpp(dhgroup_kpp, 0, 0); in nvmet_setup_dhgroup()
88 if (IS_ERR(ctrl->dh_tfm)) { in nvmet_setup_dhgroup()
89 pr_debug("%s: ctrl %d failed to setup DH group %d, err %ld\n", in nvmet_setup_dhgroup()
90 __func__, ctrl->cntlid, dhgroup_id, in nvmet_setup_dhgroup()
91 PTR_ERR(ctrl->dh_tfm)); in nvmet_setup_dhgroup()
92 ret = PTR_ERR(ctrl->dh_tfm); in nvmet_setup_dhgroup()
93 ctrl->dh_tfm = NULL; in nvmet_setup_dhgroup()
94 ctrl->dh_gid = 0; in nvmet_setup_dhgroup()
96 ctrl->dh_gid = dhgroup_id; in nvmet_setup_dhgroup()
97 pr_debug("%s: ctrl %d setup DH group %d\n", in nvmet_setup_dhgroup()
98 __func__, ctrl->cntlid, ctrl->dh_gid); in nvmet_setup_dhgroup()
99 ret = nvme_auth_gen_privkey(ctrl->dh_tfm, ctrl->dh_gid); in nvmet_setup_dhgroup()
101 pr_debug("%s: ctrl %d failed to generate private key, err %d\n", in nvmet_setup_dhgroup()
102 __func__, ctrl->cntlid, ret); in nvmet_setup_dhgroup()
103 kfree_sensitive(ctrl->dh_key); in nvmet_setup_dhgroup()
106 ctrl->dh_keysize = crypto_kpp_maxsize(ctrl->dh_tfm); in nvmet_setup_dhgroup()
107 kfree_sensitive(ctrl->dh_key); in nvmet_setup_dhgroup()
108 ctrl->dh_key = kzalloc(ctrl->dh_keysize, GFP_KERNEL); in nvmet_setup_dhgroup()
109 if (!ctrl->dh_key) { in nvmet_setup_dhgroup()
110 pr_warn("ctrl %d failed to allocate public key\n", in nvmet_setup_dhgroup()
111 ctrl->cntlid); in nvmet_setup_dhgroup()
112 return -ENOMEM; in nvmet_setup_dhgroup()
114 ret = nvme_auth_gen_pubkey(ctrl->dh_tfm, ctrl->dh_key, in nvmet_setup_dhgroup()
115 ctrl->dh_keysize); in nvmet_setup_dhgroup()
117 pr_warn("ctrl %d failed to generate public key\n", in nvmet_setup_dhgroup()
118 ctrl->cntlid); in nvmet_setup_dhgroup()
119 kfree(ctrl->dh_key); in nvmet_setup_dhgroup()
120 ctrl->dh_key = NULL; in nvmet_setup_dhgroup()
127 int nvmet_setup_auth(struct nvmet_ctrl *ctrl) in nvmet_setup_auth() argument
135 if (nvmet_is_disc_subsys(ctrl->subsys)) in nvmet_setup_auth()
138 if (ctrl->subsys->allow_any_host) in nvmet_setup_auth()
141 list_for_each_entry(p, &ctrl->subsys->hosts, entry) { in nvmet_setup_auth()
142 pr_debug("check %s\n", nvmet_host_name(p->host)); in nvmet_setup_auth()
143 if (strcmp(nvmet_host_name(p->host), ctrl->hostnqn)) in nvmet_setup_auth()
145 host = p->host; in nvmet_setup_auth()
149 pr_debug("host %s not found\n", ctrl->hostnqn); in nvmet_setup_auth()
150 ret = -EPERM; in nvmet_setup_auth()
154 ret = nvmet_setup_dhgroup(ctrl, host->dhchap_dhgroup_id); in nvmet_setup_auth()
158 if (!host->dhchap_secret) { in nvmet_setup_auth()
163 if (host->dhchap_hash_id == ctrl->shash_id) { in nvmet_setup_auth()
164 pr_debug("Re-use existing hash ID %d\n", in nvmet_setup_auth()
165 ctrl->shash_id); in nvmet_setup_auth()
167 hash_name = nvme_auth_hmac_name(host->dhchap_hash_id); in nvmet_setup_auth()
169 pr_warn("Hash ID %d invalid\n", host->dhchap_hash_id); in nvmet_setup_auth()
170 ret = -EINVAL; in nvmet_setup_auth()
173 ctrl->shash_id = host->dhchap_hash_id; in nvmet_setup_auth()
176 /* Skip the 'DHHC-1:XX:' prefix */ in nvmet_setup_auth()
177 nvme_auth_free_key(ctrl->host_key); in nvmet_setup_auth()
178 ctrl->host_key = nvme_auth_extract_key(host->dhchap_secret + 10, in nvmet_setup_auth()
179 host->dhchap_key_hash); in nvmet_setup_auth()
180 if (IS_ERR(ctrl->host_key)) { in nvmet_setup_auth()
181 ret = PTR_ERR(ctrl->host_key); in nvmet_setup_auth()
182 ctrl->host_key = NULL; in nvmet_setup_auth()
186 ctrl->host_key->hash > 0 ? in nvmet_setup_auth()
187 nvme_auth_hmac_name(ctrl->host_key->hash) : "none", in nvmet_setup_auth()
188 (int)ctrl->host_key->len, ctrl->host_key->key); in nvmet_setup_auth()
190 nvme_auth_free_key(ctrl->ctrl_key); in nvmet_setup_auth()
191 if (!host->dhchap_ctrl_secret) { in nvmet_setup_auth()
192 ctrl->ctrl_key = NULL; in nvmet_setup_auth()
196 ctrl->ctrl_key = nvme_auth_extract_key(host->dhchap_ctrl_secret + 10, in nvmet_setup_auth()
197 host->dhchap_ctrl_key_hash); in nvmet_setup_auth()
198 if (IS_ERR(ctrl->ctrl_key)) { in nvmet_setup_auth()
199 ret = PTR_ERR(ctrl->ctrl_key); in nvmet_setup_auth()
200 ctrl->ctrl_key = NULL; in nvmet_setup_auth()
203 pr_debug("%s: using ctrl hash %s key %*ph\n", __func__, in nvmet_setup_auth()
204 ctrl->ctrl_key->hash > 0 ? in nvmet_setup_auth()
205 nvme_auth_hmac_name(ctrl->ctrl_key->hash) : "none", in nvmet_setup_auth()
206 (int)ctrl->ctrl_key->len, ctrl->ctrl_key->key); in nvmet_setup_auth()
210 if (ctrl->host_key) { in nvmet_setup_auth()
211 nvme_auth_free_key(ctrl->host_key); in nvmet_setup_auth()
212 ctrl->host_key = NULL; in nvmet_setup_auth()
214 ctrl->shash_id = 0; in nvmet_setup_auth()
224 cancel_delayed_work(&sq->auth_expired_work); in nvmet_auth_sq_free()
225 kfree(sq->dhchap_c1); in nvmet_auth_sq_free()
226 sq->dhchap_c1 = NULL; in nvmet_auth_sq_free()
227 kfree(sq->dhchap_c2); in nvmet_auth_sq_free()
228 sq->dhchap_c2 = NULL; in nvmet_auth_sq_free()
229 kfree(sq->dhchap_skey); in nvmet_auth_sq_free()
230 sq->dhchap_skey = NULL; in nvmet_auth_sq_free()
233 void nvmet_destroy_auth(struct nvmet_ctrl *ctrl) in nvmet_destroy_auth() argument
235 ctrl->shash_id = 0; in nvmet_destroy_auth()
237 if (ctrl->dh_tfm) { in nvmet_destroy_auth()
238 crypto_free_kpp(ctrl->dh_tfm); in nvmet_destroy_auth()
239 ctrl->dh_tfm = NULL; in nvmet_destroy_auth()
240 ctrl->dh_gid = 0; in nvmet_destroy_auth()
242 kfree_sensitive(ctrl->dh_key); in nvmet_destroy_auth()
243 ctrl->dh_key = NULL; in nvmet_destroy_auth()
245 if (ctrl->host_key) { in nvmet_destroy_auth()
246 nvme_auth_free_key(ctrl->host_key); in nvmet_destroy_auth()
247 ctrl->host_key = NULL; in nvmet_destroy_auth()
249 if (ctrl->ctrl_key) { in nvmet_destroy_auth()
250 nvme_auth_free_key(ctrl->ctrl_key); in nvmet_destroy_auth()
251 ctrl->ctrl_key = NULL; in nvmet_destroy_auth()
257 if (req->sq->ctrl->host_key && in nvmet_check_auth_status()
258 !req->sq->authenticated) in nvmet_check_auth_status()
268 struct nvmet_ctrl *ctrl = req->sq->ctrl; in nvmet_auth_host_hash() local
270 u8 *challenge = req->sq->dhchap_c1, *host_response; in nvmet_auth_host_hash()
274 hash_name = nvme_auth_hmac_name(ctrl->shash_id); in nvmet_auth_host_hash()
276 pr_warn("Hash ID %d invalid\n", ctrl->shash_id); in nvmet_auth_host_hash()
277 return -EINVAL; in nvmet_auth_host_hash()
287 pr_debug("%s: hash len mismatch (len %d digest %d)\n", in nvmet_auth_host_hash()
290 ret = -EINVAL; in nvmet_auth_host_hash()
294 host_response = nvme_auth_transform_key(ctrl->host_key, ctrl->hostnqn); in nvmet_auth_host_hash()
301 ctrl->host_key->len); in nvmet_auth_host_hash()
305 if (ctrl->dh_gid != NVME_AUTH_DHGROUP_NULL) { in nvmet_auth_host_hash()
308 ret = -ENOMEM; in nvmet_auth_host_hash()
311 ret = nvme_auth_augmented_challenge(ctrl->shash_id, in nvmet_auth_host_hash()
312 req->sq->dhchap_skey, in nvmet_auth_host_hash()
313 req->sq->dhchap_skey_len, in nvmet_auth_host_hash()
314 req->sq->dhchap_c1, in nvmet_auth_host_hash()
320 pr_debug("ctrl %d qid %d host response seq %u transaction %d\n", in nvmet_auth_host_hash()
321 ctrl->cntlid, req->sq->qid, req->sq->dhchap_s1, in nvmet_auth_host_hash()
322 req->sq->dhchap_tid); in nvmet_auth_host_hash()
327 ret = -ENOMEM; in nvmet_auth_host_hash()
330 shash->tfm = shash_tfm; in nvmet_auth_host_hash()
337 put_unaligned_le32(req->sq->dhchap_s1, buf); in nvmet_auth_host_hash()
341 put_unaligned_le16(req->sq->dhchap_tid, buf); in nvmet_auth_host_hash()
352 ret = crypto_shash_update(shash, ctrl->hostnqn, strlen(ctrl->hostnqn)); in nvmet_auth_host_hash()
358 ret = crypto_shash_update(shash, ctrl->subsysnqn, in nvmet_auth_host_hash()
359 strlen(ctrl->subsysnqn)); in nvmet_auth_host_hash()
364 if (challenge != req->sq->dhchap_c1) in nvmet_auth_host_hash()
379 struct nvmet_ctrl *ctrl = req->sq->ctrl; in nvmet_auth_ctrl_hash() local
381 u8 *challenge = req->sq->dhchap_c2, *ctrl_response; in nvmet_auth_ctrl_hash()
385 hash_name = nvme_auth_hmac_name(ctrl->shash_id); in nvmet_auth_ctrl_hash()
387 pr_warn("Hash ID %d invalid\n", ctrl->shash_id); in nvmet_auth_ctrl_hash()
388 return -EINVAL; in nvmet_auth_ctrl_hash()
398 pr_debug("%s: hash len mismatch (len %d digest %d)\n", in nvmet_auth_ctrl_hash()
401 ret = -EINVAL; in nvmet_auth_ctrl_hash()
405 ctrl_response = nvme_auth_transform_key(ctrl->ctrl_key, in nvmet_auth_ctrl_hash()
406 ctrl->subsysnqn); in nvmet_auth_ctrl_hash()
413 ctrl->ctrl_key->len); in nvmet_auth_ctrl_hash()
417 if (ctrl->dh_gid != NVME_AUTH_DHGROUP_NULL) { in nvmet_auth_ctrl_hash()
420 ret = -ENOMEM; in nvmet_auth_ctrl_hash()
423 ret = nvme_auth_augmented_challenge(ctrl->shash_id, in nvmet_auth_ctrl_hash()
424 req->sq->dhchap_skey, in nvmet_auth_ctrl_hash()
425 req->sq->dhchap_skey_len, in nvmet_auth_ctrl_hash()
426 req->sq->dhchap_c2, in nvmet_auth_ctrl_hash()
435 ret = -ENOMEM; in nvmet_auth_ctrl_hash()
438 shash->tfm = shash_tfm; in nvmet_auth_ctrl_hash()
446 put_unaligned_le32(req->sq->dhchap_s2, buf); in nvmet_auth_ctrl_hash()
450 put_unaligned_le16(req->sq->dhchap_tid, buf); in nvmet_auth_ctrl_hash()
461 ret = crypto_shash_update(shash, ctrl->subsysnqn, in nvmet_auth_ctrl_hash()
462 strlen(ctrl->subsysnqn)); in nvmet_auth_ctrl_hash()
468 ret = crypto_shash_update(shash, ctrl->hostnqn, strlen(ctrl->hostnqn)); in nvmet_auth_ctrl_hash()
473 if (challenge != req->sq->dhchap_c2) in nvmet_auth_ctrl_hash()
486 struct nvmet_ctrl *ctrl = req->sq->ctrl; in nvmet_auth_ctrl_exponential() local
489 if (!ctrl->dh_key) { in nvmet_auth_ctrl_exponential()
490 pr_warn("ctrl %d no DH public key!\n", ctrl->cntlid); in nvmet_auth_ctrl_exponential()
491 return -ENOKEY; in nvmet_auth_ctrl_exponential()
493 if (buf_size != ctrl->dh_keysize) { in nvmet_auth_ctrl_exponential()
494 pr_warn("ctrl %d DH public key size mismatch, need %zu is %d\n", in nvmet_auth_ctrl_exponential()
495 ctrl->cntlid, ctrl->dh_keysize, buf_size); in nvmet_auth_ctrl_exponential()
496 ret = -EINVAL; in nvmet_auth_ctrl_exponential()
498 memcpy(buf, ctrl->dh_key, buf_size); in nvmet_auth_ctrl_exponential()
499 pr_debug("%s: ctrl %d public key %*ph\n", __func__, in nvmet_auth_ctrl_exponential()
500 ctrl->cntlid, (int)buf_size, buf); in nvmet_auth_ctrl_exponential()
509 struct nvmet_ctrl *ctrl = req->sq->ctrl; in nvmet_auth_ctrl_sesskey() local
512 req->sq->dhchap_skey_len = ctrl->dh_keysize; in nvmet_auth_ctrl_sesskey()
513 req->sq->dhchap_skey = kzalloc(req->sq->dhchap_skey_len, GFP_KERNEL); in nvmet_auth_ctrl_sesskey()
514 if (!req->sq->dhchap_skey) in nvmet_auth_ctrl_sesskey()
515 return -ENOMEM; in nvmet_auth_ctrl_sesskey()
516 ret = nvme_auth_gen_shared_secret(ctrl->dh_tfm, in nvmet_auth_ctrl_sesskey()
518 req->sq->dhchap_skey, in nvmet_auth_ctrl_sesskey()
519 req->sq->dhchap_skey_len); in nvmet_auth_ctrl_sesskey()
524 (int)req->sq->dhchap_skey_len, in nvmet_auth_ctrl_sesskey()
525 req->sq->dhchap_skey); in nvmet_auth_ctrl_sesskey()