Line data Source code
1 : /* SPDX-License-Identifier: BSD-3-Clause
2 : * Copyright (c) 2024 Intel Corporation. All rights reserved.
3 : */
4 :
5 : #include "spdk/base64.h"
6 : #include "spdk/crc32.h"
7 : #include "spdk/endian.h"
8 : #include "spdk/log.h"
9 : #include "spdk/string.h"
10 : #include "spdk/util.h"
11 : #include "spdk_internal/nvme.h"
12 : #include "nvme_internal.h"
13 :
14 : #ifdef SPDK_CONFIG_HAVE_EVP_MAC
15 : #include <openssl/dh.h>
16 : #include <openssl/evp.h>
17 : #include <openssl/param_build.h>
18 : #include <openssl/rand.h>
19 : #endif
20 :
21 : struct nvme_auth_digest {
22 : uint8_t id;
23 : const char *name;
24 : uint8_t len;
25 : };
26 :
27 : struct nvme_auth_dhgroup {
28 : uint8_t id;
29 : const char *name;
30 : };
31 :
32 : #define NVME_AUTH_DATA_SIZE 4096
33 : #define NVME_AUTH_DH_KEY_MAX_SIZE 1024
34 : #define NVME_AUTH_CHAP_KEY_MAX_SIZE 256
35 :
36 : #define AUTH_DEBUGLOG(q, fmt, ...) \
37 : SPDK_DEBUGLOG(nvme_auth, "[%s:%s:%u] " fmt, (q)->ctrlr->trid.subnqn, \
38 : (q)->ctrlr->opts.hostnqn, (q)->id, ## __VA_ARGS__)
39 : #define AUTH_ERRLOG(q, fmt, ...) \
40 : SPDK_ERRLOG("[%s:%s:%u] " fmt, (q)->ctrlr->trid.subnqn, (q)->ctrlr->opts.hostnqn, \
41 : (q)->id, ## __VA_ARGS__)
42 : #define AUTH_LOGDUMP(msg, buf, len) \
43 : SPDK_LOGDUMP(nvme_auth, msg, buf, len)
44 :
45 : static const struct nvme_auth_digest g_digests[] = {
46 : { SPDK_NVMF_DHCHAP_HASH_SHA256, "sha256", 32 },
47 : { SPDK_NVMF_DHCHAP_HASH_SHA384, "sha384", 48 },
48 : { SPDK_NVMF_DHCHAP_HASH_SHA512, "sha512", 64 },
49 : };
50 :
51 : static const struct nvme_auth_dhgroup g_dhgroups[] = {
52 : { SPDK_NVMF_DHCHAP_DHGROUP_NULL, "null" },
53 : { SPDK_NVMF_DHCHAP_DHGROUP_2048, "ffdhe2048" },
54 : { SPDK_NVMF_DHCHAP_DHGROUP_3072, "ffdhe3072" },
55 : { SPDK_NVMF_DHCHAP_DHGROUP_4096, "ffdhe4096" },
56 : { SPDK_NVMF_DHCHAP_DHGROUP_6144, "ffdhe6144" },
57 : { SPDK_NVMF_DHCHAP_DHGROUP_8192, "ffdhe8192" },
58 : };
59 :
60 : static const struct nvme_auth_digest *
61 0 : nvme_auth_get_digest(int id)
62 : {
63 : size_t i;
64 :
65 0 : for (i = 0; i < SPDK_COUNTOF(g_digests); ++i) {
66 0 : if (g_digests[i].id == id) {
67 0 : return &g_digests[i];
68 : }
69 : }
70 :
71 0 : return NULL;
72 : }
73 :
74 : int
75 0 : spdk_nvme_dhchap_get_digest_id(const char *digest)
76 : {
77 : size_t i;
78 :
79 0 : for (i = 0; i < SPDK_COUNTOF(g_digests); ++i) {
80 0 : if (strcmp(g_digests[i].name, digest) == 0) {
81 0 : return g_digests[i].id;
82 : }
83 : }
84 :
85 0 : return -EINVAL;
86 : }
87 :
88 : const char *
89 0 : spdk_nvme_dhchap_get_digest_name(int id)
90 : {
91 0 : const struct nvme_auth_digest *digest = nvme_auth_get_digest(id);
92 :
93 0 : return digest != NULL ? digest->name : NULL;
94 : }
95 :
96 : int
97 0 : spdk_nvme_dhchap_get_dhgroup_id(const char *dhgroup)
98 : {
99 : size_t i;
100 :
101 0 : for (i = 0; i < SPDK_COUNTOF(g_dhgroups); ++i) {
102 0 : if (strcmp(g_dhgroups[i].name, dhgroup) == 0) {
103 0 : return g_dhgroups[i].id;
104 : }
105 : }
106 :
107 0 : return -EINVAL;
108 : }
109 :
110 : const char *
111 0 : spdk_nvme_dhchap_get_dhgroup_name(int id)
112 : {
113 : size_t i;
114 :
115 0 : for (i = 0; i < SPDK_COUNTOF(g_dhgroups); ++i) {
116 0 : if (g_dhgroups[i].id == id) {
117 0 : return g_dhgroups[i].name;
118 : }
119 : }
120 :
121 0 : return NULL;
122 : }
123 :
124 : uint8_t
125 0 : spdk_nvme_dhchap_get_digest_length(int id)
126 : {
127 0 : const struct nvme_auth_digest *digest = nvme_auth_get_digest(id);
128 :
129 0 : return digest != NULL ? digest->len : 0;
130 : }
131 :
132 : #ifdef SPDK_CONFIG_HAVE_EVP_MAC
133 : static bool
134 0 : nvme_auth_digest_allowed(struct spdk_nvme_qpair *qpair, uint8_t digest)
135 : {
136 0 : struct spdk_nvme_ctrlr *ctrlr = qpair->ctrlr;
137 :
138 0 : return ctrlr->opts.dhchap_digests & SPDK_BIT(digest);
139 : }
140 :
141 : static bool
142 0 : nvme_auth_dhgroup_allowed(struct spdk_nvme_qpair *qpair, uint8_t dhgroup)
143 : {
144 0 : struct spdk_nvme_ctrlr *ctrlr = qpair->ctrlr;
145 :
146 0 : return ctrlr->opts.dhchap_dhgroups & SPDK_BIT(dhgroup);
147 : }
148 :
149 : static void
150 0 : nvme_auth_set_state(struct spdk_nvme_qpair *qpair, enum nvme_qpair_auth_state state)
151 : {
152 : static const char *state_names[] __attribute__((unused)) = {
153 : [NVME_QPAIR_AUTH_STATE_NEGOTIATE] = "negotiate",
154 : [NVME_QPAIR_AUTH_STATE_AWAIT_NEGOTIATE] = "await-negotiate",
155 : [NVME_QPAIR_AUTH_STATE_AWAIT_CHALLENGE] = "await-challenge",
156 : [NVME_QPAIR_AUTH_STATE_AWAIT_REPLY] = "await-reply",
157 : [NVME_QPAIR_AUTH_STATE_AWAIT_SUCCESS1] = "await-success1",
158 : [NVME_QPAIR_AUTH_STATE_AWAIT_SUCCESS2] = "await-success2",
159 : [NVME_QPAIR_AUTH_STATE_AWAIT_FAILURE2] = "await-failure2",
160 : [NVME_QPAIR_AUTH_STATE_DONE] = "done",
161 : };
162 :
163 0 : AUTH_DEBUGLOG(qpair, "auth state: %s\n", state_names[state]);
164 0 : qpair->auth.state = state;
165 0 : }
166 :
167 : static void
168 0 : nvme_auth_set_failure(struct spdk_nvme_qpair *qpair, int status, bool failure2)
169 : {
170 0 : if (qpair->auth.status == 0) {
171 0 : qpair->auth.status = status;
172 : }
173 :
174 0 : nvme_auth_set_state(qpair, failure2 ?
175 : NVME_QPAIR_AUTH_STATE_AWAIT_FAILURE2 :
176 : NVME_QPAIR_AUTH_STATE_DONE);
177 0 : }
178 :
179 : static void
180 0 : nvme_auth_print_cpl(struct spdk_nvme_qpair *qpair, const char *msg)
181 : {
182 0 : struct nvme_completion_poll_status *status = qpair->poll_status;
183 :
184 0 : AUTH_ERRLOG(qpair, "%s failed: sc=%d, sct=%d (timed out: %s)\n", msg, status->cpl.status.sc,
185 : status->cpl.status.sct, status->timed_out ? "true" : "false");
186 0 : }
187 :
188 : static uint32_t
189 0 : nvme_auth_get_seqnum(struct spdk_nvme_qpair *qpair)
190 : {
191 0 : struct spdk_nvme_ctrlr *ctrlr = qpair->ctrlr;
192 : uint32_t seqnum;
193 : int rc;
194 :
195 0 : nvme_ctrlr_lock(ctrlr);
196 0 : if (ctrlr->auth_seqnum == 0) {
197 0 : rc = RAND_bytes((void *)&ctrlr->auth_seqnum, sizeof(ctrlr->auth_seqnum));
198 0 : if (rc != 1) {
199 0 : nvme_ctrlr_unlock(ctrlr);
200 0 : return 0;
201 : }
202 : }
203 0 : if (++ctrlr->auth_seqnum == 0) {
204 0 : ctrlr->auth_seqnum = 1;
205 : }
206 0 : seqnum = ctrlr->auth_seqnum;
207 0 : nvme_ctrlr_unlock(ctrlr);
208 :
209 0 : return seqnum;
210 : }
211 :
212 : static int
213 0 : nvme_auth_transform_key(struct spdk_key *key, int hash, const char *nqn,
214 : const void *keyin, size_t keylen, void *out, size_t outlen)
215 : {
216 0 : EVP_MAC *hmac = NULL;
217 0 : EVP_MAC_CTX *ctx = NULL;
218 : OSSL_PARAM params[2];
219 : int rc;
220 :
221 0 : switch (hash) {
222 0 : case SPDK_NVMF_DHCHAP_HASH_NONE:
223 0 : if (keylen > outlen) {
224 0 : SPDK_ERRLOG("Key buffer too small: %zu < %zu (key=%s)\n", outlen, keylen,
225 : spdk_key_get_name(key));
226 0 : return -ENOBUFS;
227 : }
228 0 : memcpy(out, keyin, keylen);
229 0 : return keylen;
230 0 : case SPDK_NVMF_DHCHAP_HASH_SHA256:
231 : case SPDK_NVMF_DHCHAP_HASH_SHA384:
232 : case SPDK_NVMF_DHCHAP_HASH_SHA512:
233 0 : break;
234 0 : default:
235 0 : SPDK_ERRLOG("Unsupported key hash: 0x%x (key=%s)\n", hash, spdk_key_get_name(key));
236 0 : return -EINVAL;
237 : }
238 :
239 0 : hmac = EVP_MAC_fetch(NULL, "hmac", NULL);
240 0 : if (hmac == NULL) {
241 0 : return -EIO;
242 : }
243 0 : ctx = EVP_MAC_CTX_new(hmac);
244 0 : if (ctx == NULL) {
245 0 : rc = -EIO;
246 0 : goto out;
247 : }
248 0 : params[0] = OSSL_PARAM_construct_utf8_string("digest",
249 0 : (char *)spdk_nvme_dhchap_get_digest_name(hash), 0);
250 0 : params[1] = OSSL_PARAM_construct_end();
251 :
252 0 : if (EVP_MAC_init(ctx, keyin, keylen, params) != 1) {
253 0 : rc = -EIO;
254 0 : goto out;
255 : }
256 0 : if (EVP_MAC_update(ctx, nqn, strlen(nqn)) != 1) {
257 0 : rc = -EIO;
258 0 : goto out;
259 : }
260 0 : if (EVP_MAC_update(ctx, "NVMe-over-Fabrics", strlen("NVMe-over-Fabrics")) != 1) {
261 0 : rc = -EIO;
262 0 : goto out;
263 : }
264 0 : if (EVP_MAC_final(ctx, out, &outlen, outlen) != 1) {
265 0 : rc = -EIO;
266 0 : goto out;
267 : }
268 0 : rc = (int)outlen;
269 0 : out:
270 0 : EVP_MAC_CTX_free(ctx);
271 0 : EVP_MAC_free(hmac);
272 :
273 0 : return rc;
274 : }
275 :
276 : static int
277 0 : nvme_auth_get_key(struct spdk_key *key, const char *nqn, void *buf, size_t buflen)
278 : {
279 0 : char keystr[NVME_AUTH_CHAP_KEY_MAX_SIZE + 1] = {};
280 0 : char keyb64[NVME_AUTH_CHAP_KEY_MAX_SIZE] = {};
281 : char *tmp, *secret;
282 : int rc, hash;
283 : size_t keylen;
284 :
285 0 : rc = spdk_key_get_key(key, keystr, NVME_AUTH_CHAP_KEY_MAX_SIZE);
286 0 : if (rc < 0) {
287 0 : SPDK_ERRLOG("Failed to load key=%s: %s\n", spdk_key_get_name(key),
288 : spdk_strerror(-rc));
289 0 : goto out;
290 : }
291 :
292 0 : rc = sscanf(keystr, "DHHC-1:%02x:", &hash);
293 0 : if (rc != 1) {
294 0 : SPDK_ERRLOG("Invalid key format (key=%s)\n", spdk_key_get_name(key));
295 0 : rc = -EINVAL;
296 0 : goto out;
297 :
298 : }
299 : /* Start at the first character after second ":" and remove the trailing ":" */
300 0 : secret = &keystr[10];
301 0 : tmp = strstr(secret, ":");
302 0 : if (!tmp) {
303 0 : SPDK_ERRLOG("Invalid key format (key=%s)\n", spdk_key_get_name(key));
304 0 : rc = -EINVAL;
305 0 : goto out;
306 : }
307 :
308 0 : *tmp = '\0';
309 0 : keylen = sizeof(keyb64);
310 0 : rc = spdk_base64_decode(keyb64, &keylen, secret);
311 0 : if (rc != 0) {
312 0 : SPDK_ERRLOG("Invalid key format (key=%s)\n", spdk_key_get_name(key));
313 0 : rc = -EINVAL;
314 0 : goto out;
315 : }
316 : /* Only 32B, 48B, and 64B keys are supported (+ 4B, as they're followed by a crc32) */
317 0 : if (keylen != 36 && keylen != 52 && keylen != 68) {
318 0 : SPDK_ERRLOG("Invalid key size=%zu (key=%s)\n", keylen, spdk_key_get_name(key));
319 0 : rc = -EINVAL;
320 0 : goto out;
321 : }
322 :
323 0 : keylen -= 4;
324 0 : if (~spdk_crc32_ieee_update(keyb64, keylen, ~0) != from_le32(&keyb64[keylen])) {
325 0 : SPDK_ERRLOG("Invalid key checksum (key=%s)\n", spdk_key_get_name(key));
326 0 : rc = -EINVAL;
327 0 : goto out;
328 : }
329 :
330 0 : rc = nvme_auth_transform_key(key, hash, nqn, keyb64, keylen, buf, buflen);
331 0 : out:
332 0 : spdk_memset_s(keystr, sizeof(keystr), 0, sizeof(keystr));
333 0 : spdk_memset_s(keyb64, sizeof(keyb64), 0, sizeof(keyb64));
334 :
335 0 : return rc;
336 : }
337 :
338 : static int
339 0 : nvme_auth_augment_challenge(const void *cval, size_t clen, const void *key, size_t keylen,
340 : void *caval, size_t *calen, enum spdk_nvmf_dhchap_hash hash)
341 : {
342 0 : EVP_MAC *hmac = NULL;
343 0 : EVP_MAC_CTX *ctx = NULL;
344 0 : EVP_MD *md = NULL;
345 : OSSL_PARAM params[2];
346 : uint8_t keydgst[NVME_AUTH_DIGEST_MAX_SIZE];
347 0 : unsigned int dgstlen = sizeof(keydgst);
348 0 : int rc = 0;
349 :
350 : /* If there's no key, there's nothing to augment, cval == caval */
351 0 : if (key == NULL) {
352 0 : assert(clen <= *calen);
353 0 : memcpy(caval, cval, clen);
354 0 : *calen = clen;
355 0 : return 0;
356 : }
357 :
358 0 : md = EVP_MD_fetch(NULL, spdk_nvme_dhchap_get_digest_name(hash), NULL);
359 0 : if (!md) {
360 0 : SPDK_ERRLOG("Failed to fetch digest function: %d\n", hash);
361 0 : return -EINVAL;
362 : }
363 0 : if (EVP_Digest(key, keylen, keydgst, &dgstlen, md, NULL) != 1) {
364 0 : rc = -EIO;
365 0 : goto out;
366 : }
367 :
368 0 : hmac = EVP_MAC_fetch(NULL, "hmac", NULL);
369 0 : if (hmac == NULL) {
370 0 : rc = -EIO;
371 0 : goto out;
372 : }
373 0 : ctx = EVP_MAC_CTX_new(hmac);
374 0 : if (ctx == NULL) {
375 0 : rc = -EIO;
376 0 : goto out;
377 : }
378 0 : params[0] = OSSL_PARAM_construct_utf8_string("digest",
379 0 : (char *)spdk_nvme_dhchap_get_digest_name(hash), 0);
380 0 : params[1] = OSSL_PARAM_construct_end();
381 :
382 0 : if (EVP_MAC_init(ctx, keydgst, dgstlen, params) != 1) {
383 0 : rc = -EIO;
384 0 : goto out;
385 : }
386 0 : if (EVP_MAC_update(ctx, cval, clen) != 1) {
387 0 : rc = -EIO;
388 0 : goto out;
389 : }
390 0 : if (EVP_MAC_final(ctx, caval, calen, *calen) != 1) {
391 0 : rc = -EIO;
392 0 : goto out;
393 : }
394 0 : out:
395 0 : EVP_MD_free(md);
396 0 : EVP_MAC_CTX_free(ctx);
397 0 : EVP_MAC_free(hmac);
398 :
399 0 : return rc;
400 : }
401 :
402 : int
403 0 : spdk_nvme_dhchap_calculate(struct spdk_key *key, enum spdk_nvmf_dhchap_hash hash,
404 : const char *type, uint32_t seq, uint16_t tid, uint8_t scc,
405 : const char *nqn1, const char *nqn2, const void *dhkey, size_t dhlen,
406 : const void *cval, void *rval)
407 : {
408 : EVP_MAC *hmac;
409 : EVP_MAC_CTX *ctx;
410 : OSSL_PARAM params[2];
411 0 : uint8_t keybuf[NVME_AUTH_CHAP_KEY_MAX_SIZE], term = 0;
412 : uint8_t caval[NVME_AUTH_DATA_SIZE];
413 0 : size_t hlen, calen = sizeof(caval);
414 : int rc, keylen;
415 :
416 0 : hlen = spdk_nvme_dhchap_get_digest_length(hash);
417 0 : rc = nvme_auth_augment_challenge(cval, hlen, dhkey, dhlen, caval, &calen, hash);
418 0 : if (rc != 0) {
419 0 : return rc;
420 : }
421 :
422 0 : hmac = EVP_MAC_fetch(NULL, "hmac", NULL);
423 0 : if (hmac == NULL) {
424 0 : return -EIO;
425 : }
426 :
427 0 : ctx = EVP_MAC_CTX_new(hmac);
428 0 : if (ctx == NULL) {
429 0 : rc = -EIO;
430 0 : goto out;
431 : }
432 :
433 0 : keylen = nvme_auth_get_key(key, nqn1, keybuf, sizeof(keybuf));
434 0 : if (keylen < 0) {
435 0 : rc = keylen;
436 0 : goto out;
437 : }
438 :
439 0 : params[0] = OSSL_PARAM_construct_utf8_string("digest",
440 0 : (char *)spdk_nvme_dhchap_get_digest_name(hash), 0);
441 0 : params[1] = OSSL_PARAM_construct_end();
442 :
443 0 : rc = -EIO;
444 0 : if (EVP_MAC_init(ctx, keybuf, (size_t)keylen, params) != 1) {
445 0 : goto out;
446 : }
447 0 : if (EVP_MAC_update(ctx, caval, calen) != 1) {
448 0 : goto out;
449 : }
450 0 : if (EVP_MAC_update(ctx, (void *)&seq, sizeof(seq)) != 1) {
451 0 : goto out;
452 : }
453 0 : if (EVP_MAC_update(ctx, (void *)&tid, sizeof(tid)) != 1) {
454 0 : goto out;
455 : }
456 0 : if (EVP_MAC_update(ctx, (void *)&scc, sizeof(scc)) != 1) {
457 0 : goto out;
458 : }
459 0 : if (EVP_MAC_update(ctx, (void *)type, strlen(type)) != 1) {
460 0 : goto out;
461 : }
462 0 : if (EVP_MAC_update(ctx, (void *)nqn1, strlen(nqn1)) != 1) {
463 0 : goto out;
464 : }
465 0 : if (EVP_MAC_update(ctx, (void *)&term, sizeof(term)) != 1) {
466 0 : goto out;
467 : }
468 0 : if (EVP_MAC_update(ctx, (void *)nqn2, strlen(nqn2)) != 1) {
469 0 : goto out;
470 : }
471 0 : if (EVP_MAC_final(ctx, rval, &hlen, hlen) != 1) {
472 0 : goto out;
473 : }
474 0 : rc = 0;
475 0 : out:
476 0 : spdk_memset_s(keybuf, sizeof(keybuf), 0, sizeof(keybuf));
477 0 : EVP_MAC_CTX_free(ctx);
478 0 : EVP_MAC_free(hmac);
479 :
480 0 : return rc;
481 : }
482 :
483 : struct spdk_nvme_dhchap_dhkey *
484 0 : spdk_nvme_dhchap_generate_dhkey(enum spdk_nvmf_dhchap_dhgroup dhgroup)
485 : {
486 0 : EVP_PKEY_CTX *ctx = NULL;
487 0 : EVP_PKEY *key = NULL;
488 : OSSL_PARAM params[2];
489 :
490 0 : ctx = EVP_PKEY_CTX_new_from_name(NULL, "DHX", NULL);
491 0 : if (ctx == NULL) {
492 0 : goto error;
493 : }
494 0 : if (EVP_PKEY_keygen_init(ctx) != 1) {
495 0 : goto error;
496 : }
497 :
498 0 : params[0] = OSSL_PARAM_construct_utf8_string("group",
499 0 : (char *)spdk_nvme_dhchap_get_dhgroup_name(dhgroup), 0);
500 0 : params[1] = OSSL_PARAM_construct_end();
501 0 : if (EVP_PKEY_CTX_set_params(ctx, params) != 1) {
502 0 : SPDK_ERRLOG("Failed to set dhkey's dhgroup: %s\n",
503 : spdk_nvme_dhchap_get_dhgroup_name(dhgroup));
504 0 : goto error;
505 : }
506 0 : if (EVP_PKEY_generate(ctx, &key) != 1) {
507 0 : goto error;
508 : }
509 0 : error:
510 0 : EVP_PKEY_CTX_free(ctx);
511 0 : return (void *)key;
512 : }
513 :
514 : void
515 0 : spdk_nvme_dhchap_dhkey_free(struct spdk_nvme_dhchap_dhkey **key)
516 : {
517 0 : if (key == NULL) {
518 0 : return;
519 : }
520 :
521 0 : EVP_PKEY_free(*(EVP_PKEY **)key);
522 0 : *key = NULL;
523 : }
524 :
525 : int
526 0 : spdk_nvme_dhchap_dhkey_get_pubkey(struct spdk_nvme_dhchap_dhkey *dhkey, void *pub, size_t *len)
527 : {
528 0 : EVP_PKEY *key = (EVP_PKEY *)dhkey;
529 0 : BIGNUM *bn = NULL;
530 : int rc;
531 0 : const size_t num_bytes = (size_t)spdk_divide_round_up(EVP_PKEY_get_bits(key), 8);
532 :
533 0 : if (num_bytes == 0) {
534 0 : SPDK_ERRLOG("Failed to get key size\n");
535 0 : return -EIO;
536 : }
537 :
538 0 : if (num_bytes > *len) {
539 0 : SPDK_ERRLOG("Insufficient key buffer size=%zu (needed=%zu)",
540 : *len, num_bytes);
541 0 : return -EINVAL;
542 : }
543 0 : *len = num_bytes;
544 :
545 0 : if (EVP_PKEY_get_bn_param(key, "pub", &bn) != 1) {
546 0 : rc = -EIO;
547 0 : goto error;
548 : }
549 :
550 0 : rc = BN_bn2binpad(bn, pub, *len);
551 0 : if (rc <= 0) {
552 0 : rc = -EIO;
553 0 : goto error;
554 : }
555 0 : rc = 0;
556 0 : error:
557 0 : BN_free(bn);
558 0 : return rc;
559 : }
560 :
561 : static EVP_PKEY *
562 0 : nvme_auth_get_peerkey(const void *peerkey, size_t len, const char *dhgroup)
563 : {
564 0 : EVP_PKEY_CTX *ctx = NULL;
565 0 : EVP_PKEY *result = NULL, *key = NULL;
566 0 : OSSL_PARAM_BLD *bld = NULL;
567 0 : OSSL_PARAM *params = NULL;
568 0 : BIGNUM *bn = NULL;
569 :
570 0 : ctx = EVP_PKEY_CTX_new_from_name(NULL, "DHX", NULL);
571 0 : if (ctx == NULL) {
572 0 : goto error;
573 : }
574 0 : if (EVP_PKEY_fromdata_init(ctx) != 1) {
575 0 : goto error;
576 : }
577 :
578 0 : bn = BN_bin2bn(peerkey, len, NULL);
579 0 : if (bn == NULL) {
580 0 : goto error;
581 : }
582 :
583 0 : bld = OSSL_PARAM_BLD_new();
584 0 : if (bld == NULL) {
585 0 : goto error;
586 : }
587 0 : if (OSSL_PARAM_BLD_push_BN(bld, "pub", bn) != 1) {
588 0 : goto error;
589 : }
590 0 : if (OSSL_PARAM_BLD_push_utf8_string(bld, "group", dhgroup, 0) != 1) {
591 0 : goto error;
592 : }
593 :
594 0 : params = OSSL_PARAM_BLD_to_param(bld);
595 0 : if (params == NULL) {
596 0 : goto error;
597 : }
598 0 : if (EVP_PKEY_fromdata(ctx, &key, EVP_PKEY_PUBLIC_KEY, params) != 1) {
599 0 : SPDK_ERRLOG("Failed to create dhkey peer key\n");
600 0 : goto error;
601 : }
602 :
603 0 : result = EVP_PKEY_dup(key);
604 0 : error:
605 0 : EVP_PKEY_free(key);
606 0 : EVP_PKEY_CTX_free(ctx);
607 0 : OSSL_PARAM_BLD_free(bld);
608 0 : OSSL_PARAM_free(params);
609 0 : BN_free(bn);
610 :
611 0 : return result;
612 : }
613 :
614 : int
615 0 : spdk_nvme_dhchap_dhkey_derive_secret(struct spdk_nvme_dhchap_dhkey *dhkey,
616 : const void *peer, size_t peerlen, void *secret, size_t *seclen)
617 : {
618 0 : EVP_PKEY *key = (EVP_PKEY *)dhkey;
619 0 : EVP_PKEY_CTX *ctx = NULL;
620 0 : EVP_PKEY *peerkey = NULL;
621 0 : char dhgroup[64] = {};
622 0 : int rc = 0;
623 :
624 0 : if (EVP_PKEY_get_utf8_string_param(key, "group", dhgroup,
625 : sizeof(dhgroup), NULL) != 1) {
626 0 : return -EIO;
627 : }
628 0 : peerkey = nvme_auth_get_peerkey(peer, peerlen, dhgroup);
629 0 : if (peerkey == NULL) {
630 0 : return -EINVAL;
631 : }
632 0 : ctx = EVP_PKEY_CTX_new(key, NULL);
633 0 : if (ctx == NULL) {
634 0 : rc = -ENOMEM;
635 0 : goto out;
636 : }
637 0 : if (EVP_PKEY_derive_init(ctx) != 1) {
638 0 : rc = -EIO;
639 0 : goto out;
640 : }
641 0 : if (EVP_PKEY_CTX_set_dh_pad(ctx, 1) <= 0) {
642 0 : rc = -EIO;
643 0 : goto out;
644 : }
645 0 : if (EVP_PKEY_derive_set_peer(ctx, peerkey) != 1) {
646 0 : SPDK_ERRLOG("Failed to set dhsecret's peer key\n");
647 0 : rc = -EINVAL;
648 0 : goto out;
649 : }
650 0 : if (EVP_PKEY_derive(ctx, secret, seclen) != 1) {
651 0 : SPDK_ERRLOG("Failed to derive dhsecret\n");
652 0 : rc = -ENOBUFS;
653 0 : goto out;
654 : }
655 0 : out:
656 0 : EVP_PKEY_free(peerkey);
657 0 : EVP_PKEY_CTX_free(ctx);
658 :
659 0 : return rc;
660 : }
661 :
662 : static int
663 0 : nvme_auth_submit_request(struct spdk_nvme_qpair *qpair,
664 : enum spdk_nvmf_fabric_cmd_types type, uint32_t len)
665 : {
666 0 : struct spdk_nvme_ctrlr *ctrlr = qpair->ctrlr;
667 0 : struct nvme_request *req = qpair->reserved_req;
668 0 : struct nvme_completion_poll_status *status = qpair->poll_status;
669 0 : struct spdk_nvmf_fabric_auth_recv_cmd rcmd = {};
670 0 : struct spdk_nvmf_fabric_auth_send_cmd scmd = {};
671 :
672 0 : assert(len <= NVME_AUTH_DATA_SIZE);
673 0 : memset(&status->cpl, 0, sizeof(status->cpl));
674 0 : status->timeout_tsc = ctrlr->opts.admin_timeout_ms * spdk_get_ticks_hz() / 1000 +
675 0 : spdk_get_ticks();
676 0 : status->done = false;
677 0 : NVME_INIT_REQUEST(req, nvme_completion_poll_cb, status,
678 : NVME_PAYLOAD_CONTIG(status->dma_data, NULL), len, 0);
679 0 : switch (type) {
680 0 : case SPDK_NVMF_FABRIC_COMMAND_AUTHENTICATION_SEND:
681 0 : scmd.opcode = SPDK_NVME_OPC_FABRIC;
682 0 : scmd.fctype = type;
683 0 : scmd.spsp0 = 1;
684 0 : scmd.spsp1 = 1;
685 0 : scmd.secp = SPDK_NVMF_AUTH_SECP_NVME;
686 0 : scmd.tl = len;
687 0 : memcpy(&req->cmd, &scmd, sizeof(scmd));
688 0 : break;
689 0 : case SPDK_NVMF_FABRIC_COMMAND_AUTHENTICATION_RECV:
690 0 : rcmd.opcode = SPDK_NVME_OPC_FABRIC;
691 0 : rcmd.fctype = type;
692 0 : rcmd.spsp0 = 1;
693 0 : rcmd.spsp1 = 1;
694 0 : rcmd.secp = SPDK_NVMF_AUTH_SECP_NVME;
695 0 : rcmd.al = len;
696 0 : memcpy(&req->cmd, &rcmd, sizeof(rcmd));
697 0 : break;
698 0 : default:
699 0 : assert(0 && "invalid command");
700 : return -EINVAL;
701 : }
702 :
703 0 : return nvme_qpair_submit_request(qpair, req);
704 : }
705 :
706 : static int
707 0 : nvme_auth_recv_message(struct spdk_nvme_qpair *qpair)
708 : {
709 0 : memset(qpair->poll_status->dma_data, 0, NVME_AUTH_DATA_SIZE);
710 0 : return nvme_auth_submit_request(qpair, SPDK_NVMF_FABRIC_COMMAND_AUTHENTICATION_RECV,
711 : NVME_AUTH_DATA_SIZE);
712 : }
713 :
714 : static bool
715 0 : nvme_auth_send_failure2(struct spdk_nvme_qpair *qpair, enum spdk_nvmf_auth_failure_reason reason)
716 : {
717 0 : struct spdk_nvmf_auth_failure *msg = qpair->poll_status->dma_data;
718 0 : struct nvme_auth *auth = &qpair->auth;
719 :
720 0 : memset(qpair->poll_status->dma_data, 0, NVME_AUTH_DATA_SIZE);
721 0 : msg->auth_type = SPDK_NVMF_AUTH_TYPE_COMMON_MESSAGE;
722 0 : msg->auth_id = SPDK_NVMF_AUTH_ID_FAILURE2;
723 0 : msg->t_id = auth->tid;
724 0 : msg->rc = SPDK_NVMF_AUTH_FAILURE;
725 0 : msg->rce = reason;
726 :
727 0 : return nvme_auth_submit_request(qpair, SPDK_NVMF_FABRIC_COMMAND_AUTHENTICATION_SEND,
728 0 : sizeof(*msg)) == 0;
729 : }
730 :
731 : static int
732 0 : nvme_auth_check_message(struct spdk_nvme_qpair *qpair, enum spdk_nvmf_auth_id auth_id)
733 : {
734 0 : struct spdk_nvmf_auth_failure *msg = qpair->poll_status->dma_data;
735 0 : const char *reason = NULL;
736 0 : const char *reasons[] = {
737 : [SPDK_NVMF_AUTH_FAILED] = "authentication failed",
738 : [SPDK_NVMF_AUTH_PROTOCOL_UNUSABLE] = "protocol not usable",
739 : [SPDK_NVMF_AUTH_SCC_MISMATCH] = "secure channel concatenation mismatch",
740 : [SPDK_NVMF_AUTH_HASH_UNUSABLE] = "hash not usable",
741 : [SPDK_NVMF_AUTH_DHGROUP_UNUSABLE] = "dhgroup not usable",
742 : [SPDK_NVMF_AUTH_INCORRECT_PAYLOAD] = "incorrect payload",
743 : [SPDK_NVMF_AUTH_INCORRECT_PROTOCOL_MESSAGE] = "incorrect protocol message",
744 : };
745 :
746 0 : switch (msg->auth_type) {
747 0 : case SPDK_NVMF_AUTH_TYPE_DHCHAP:
748 0 : if (msg->auth_id == auth_id) {
749 0 : return 0;
750 : }
751 0 : AUTH_ERRLOG(qpair, "received unexpected DH-HMAC-CHAP message id: %u (expected: %u)\n",
752 : msg->auth_id, auth_id);
753 0 : break;
754 0 : case SPDK_NVMF_AUTH_TYPE_COMMON_MESSAGE:
755 : /* The only common message that we can expect to receive is AUTH_failure1 */
756 0 : if (msg->auth_id != SPDK_NVMF_AUTH_ID_FAILURE1) {
757 0 : AUTH_ERRLOG(qpair, "received unexpected common message id: %u\n",
758 : msg->auth_id);
759 0 : break;
760 : }
761 0 : if (msg->rc == SPDK_NVMF_AUTH_FAILURE && msg->rce < SPDK_COUNTOF(reasons)) {
762 0 : reason = reasons[msg->rce];
763 : }
764 0 : AUTH_ERRLOG(qpair, "received AUTH_failure1: rc=%d, rce=%d (%s)\n",
765 : msg->rc, msg->rce, reason);
766 0 : nvme_auth_set_failure(qpair, -EACCES, false);
767 0 : return -EACCES;
768 0 : default:
769 0 : AUTH_ERRLOG(qpair, "received unknown message type: %u\n", msg->auth_type);
770 0 : break;
771 : }
772 :
773 0 : nvme_auth_set_failure(qpair, -EACCES,
774 0 : nvme_auth_send_failure2(qpair,
775 : SPDK_NVMF_AUTH_INCORRECT_PROTOCOL_MESSAGE));
776 0 : return -EACCES;
777 : }
778 :
779 : static int
780 0 : nvme_auth_send_negotiate(struct spdk_nvme_qpair *qpair)
781 : {
782 0 : struct nvme_auth *auth = &qpair->auth;
783 0 : struct spdk_nvmf_auth_negotiate *msg = qpair->poll_status->dma_data;
784 0 : struct spdk_nvmf_auth_descriptor *desc = msg->descriptors;
785 : size_t i;
786 :
787 0 : memset(qpair->poll_status->dma_data, 0, NVME_AUTH_DATA_SIZE);
788 0 : desc->auth_id = SPDK_NVMF_AUTH_TYPE_DHCHAP;
789 : assert(SPDK_COUNTOF(g_digests) <= sizeof(desc->hash_id_list));
790 : assert(SPDK_COUNTOF(g_dhgroups) <= sizeof(desc->dhg_id_list));
791 :
792 0 : for (i = 0; i < SPDK_COUNTOF(g_digests); ++i) {
793 0 : if (!nvme_auth_digest_allowed(qpair, g_digests[i].id)) {
794 0 : continue;
795 : }
796 0 : AUTH_DEBUGLOG(qpair, "digest: %u (%s)\n", g_digests[i].id,
797 : spdk_nvme_dhchap_get_digest_name(g_digests[i].id));
798 0 : desc->hash_id_list[desc->halen++] = g_digests[i].id;
799 : }
800 0 : for (i = 0; i < SPDK_COUNTOF(g_dhgroups); ++i) {
801 0 : if (!nvme_auth_dhgroup_allowed(qpair, g_dhgroups[i].id)) {
802 0 : continue;
803 : }
804 0 : AUTH_DEBUGLOG(qpair, "dhgroup: %u (%s)\n", g_dhgroups[i].id,
805 : spdk_nvme_dhchap_get_dhgroup_name(g_dhgroups[i].id));
806 0 : desc->dhg_id_list[desc->dhlen++] = g_dhgroups[i].id;
807 : }
808 :
809 0 : msg->auth_type = SPDK_NVMF_AUTH_TYPE_COMMON_MESSAGE;
810 0 : msg->auth_id = SPDK_NVMF_AUTH_ID_NEGOTIATE;
811 0 : msg->t_id = auth->tid;
812 0 : msg->sc_c = SPDK_NVMF_AUTH_SCC_DISABLED;
813 0 : msg->napd = 1;
814 :
815 0 : return nvme_auth_submit_request(qpair, SPDK_NVMF_FABRIC_COMMAND_AUTHENTICATION_SEND,
816 0 : sizeof(*msg) + msg->napd * sizeof(*desc));
817 : }
818 :
819 : static int
820 0 : nvme_auth_check_challenge(struct spdk_nvme_qpair *qpair)
821 : {
822 0 : struct spdk_nvmf_dhchap_challenge *challenge = qpair->poll_status->dma_data;
823 0 : struct nvme_auth *auth = &qpair->auth;
824 : uint8_t hl;
825 : int rc;
826 :
827 0 : rc = nvme_auth_check_message(qpair, SPDK_NVMF_AUTH_ID_DHCHAP_CHALLENGE);
828 0 : if (rc != 0) {
829 0 : return rc;
830 : }
831 :
832 0 : if (challenge->t_id != auth->tid) {
833 0 : AUTH_ERRLOG(qpair, "unexpected tid: received=%u, expected=%u\n",
834 : challenge->t_id, auth->tid);
835 0 : goto error;
836 : }
837 :
838 0 : if (challenge->seqnum == 0) {
839 0 : AUTH_ERRLOG(qpair, "received challenge with seqnum=0\n");
840 0 : goto error;
841 : }
842 :
843 0 : hl = spdk_nvme_dhchap_get_digest_length(challenge->hash_id);
844 0 : if (hl == 0) {
845 0 : AUTH_ERRLOG(qpair, "unsupported hash function: 0x%x\n", challenge->hash_id);
846 0 : goto error;
847 : }
848 :
849 0 : if (challenge->hl != hl) {
850 0 : AUTH_ERRLOG(qpair, "unexpected hash length: received=%u, expected=%u\n",
851 : challenge->hl, hl);
852 0 : goto error;
853 : }
854 :
855 0 : switch (challenge->dhg_id) {
856 0 : case SPDK_NVMF_DHCHAP_DHGROUP_NULL:
857 0 : if (challenge->dhvlen != 0) {
858 0 : AUTH_ERRLOG(qpair, "unexpected dhvlen=%u for dhgroup 0\n",
859 : challenge->dhvlen);
860 0 : goto error;
861 : }
862 0 : break;
863 0 : case SPDK_NVMF_DHCHAP_DHGROUP_2048:
864 : case SPDK_NVMF_DHCHAP_DHGROUP_3072:
865 : case SPDK_NVMF_DHCHAP_DHGROUP_4096:
866 : case SPDK_NVMF_DHCHAP_DHGROUP_6144:
867 : case SPDK_NVMF_DHCHAP_DHGROUP_8192:
868 0 : if (sizeof(*challenge) + hl + challenge->dhvlen > NVME_AUTH_DATA_SIZE ||
869 0 : challenge->dhvlen == 0) {
870 0 : AUTH_ERRLOG(qpair, "invalid dhvlen=%u for dhgroup %u\n",
871 : challenge->dhvlen, challenge->dhg_id);
872 0 : goto error;
873 : }
874 0 : break;
875 0 : default:
876 0 : AUTH_ERRLOG(qpair, "unsupported dhgroup: 0x%x\n", challenge->dhg_id);
877 0 : goto error;
878 : }
879 :
880 0 : if (!nvme_auth_digest_allowed(qpair, challenge->hash_id)) {
881 0 : AUTH_ERRLOG(qpair, "received disallowed digest: %u (%s)\n", challenge->hash_id,
882 : spdk_nvme_dhchap_get_digest_name(challenge->hash_id));
883 0 : goto error;
884 : }
885 :
886 0 : if (!nvme_auth_dhgroup_allowed(qpair, challenge->dhg_id)) {
887 0 : AUTH_ERRLOG(qpair, "received disallowed dhgroup: %u (%s)\n", challenge->dhg_id,
888 : spdk_nvme_dhchap_get_dhgroup_name(challenge->dhg_id));
889 0 : goto error;
890 : }
891 :
892 0 : return 0;
893 0 : error:
894 0 : nvme_auth_set_failure(qpair, -EACCES,
895 0 : nvme_auth_send_failure2(qpair, SPDK_NVMF_AUTH_INCORRECT_PAYLOAD));
896 0 : return -EACCES;
897 : }
898 :
899 : static int
900 0 : nvme_auth_send_reply(struct spdk_nvme_qpair *qpair)
901 : {
902 0 : struct nvme_completion_poll_status *status = qpair->poll_status;
903 0 : struct spdk_nvme_ctrlr *ctrlr = qpair->ctrlr;
904 0 : struct spdk_nvmf_dhchap_challenge *challenge = status->dma_data;
905 0 : struct spdk_nvmf_dhchap_reply *reply = status->dma_data;
906 0 : struct nvme_auth *auth = &qpair->auth;
907 : struct spdk_nvme_dhchap_dhkey *dhkey;
908 0 : struct spdk_key *key = NULL, *ckey = NULL;
909 : uint8_t hl, response[NVME_AUTH_DATA_SIZE];
910 : uint8_t pubkey[NVME_AUTH_DH_KEY_MAX_SIZE];
911 : uint8_t dhsec[NVME_AUTH_DH_KEY_MAX_SIZE];
912 0 : uint8_t ctrlr_challenge[NVME_AUTH_DIGEST_MAX_SIZE] = {};
913 0 : size_t dhseclen = 0, publen = 0;
914 0 : uint32_t seqnum = 0;
915 : int rc;
916 :
917 0 : auth->hash = challenge->hash_id;
918 0 : hl = spdk_nvme_dhchap_get_digest_length(challenge->hash_id);
919 0 : if (challenge->dhg_id != SPDK_NVMF_DHCHAP_DHGROUP_NULL) {
920 0 : dhseclen = sizeof(dhsec);
921 0 : publen = sizeof(pubkey);
922 0 : AUTH_LOGDUMP("ctrlr pubkey:", &challenge->cval[hl], challenge->dhvlen);
923 0 : dhkey = spdk_nvme_dhchap_generate_dhkey(
924 0 : (enum spdk_nvmf_dhchap_dhgroup)challenge->dhg_id);
925 0 : if (dhkey == NULL) {
926 0 : rc = -EINVAL;
927 0 : goto out;
928 : }
929 0 : rc = spdk_nvme_dhchap_dhkey_get_pubkey(dhkey, pubkey, &publen);
930 0 : if (rc != 0) {
931 0 : spdk_nvme_dhchap_dhkey_free(&dhkey);
932 0 : goto out;
933 : }
934 0 : AUTH_LOGDUMP("host pubkey:", pubkey, publen);
935 0 : rc = spdk_nvme_dhchap_dhkey_derive_secret(dhkey,
936 0 : &challenge->cval[hl], challenge->dhvlen, dhsec, &dhseclen);
937 0 : spdk_nvme_dhchap_dhkey_free(&dhkey);
938 0 : if (rc != 0) {
939 0 : goto out;
940 : }
941 :
942 0 : AUTH_LOGDUMP("dh secret:", dhsec, dhseclen);
943 : }
944 :
945 0 : nvme_ctrlr_lock(ctrlr);
946 0 : key = ctrlr->opts.dhchap_key ? spdk_key_dup(ctrlr->opts.dhchap_key) : NULL;
947 0 : ckey = ctrlr->opts.dhchap_ctrlr_key ? spdk_key_dup(ctrlr->opts.dhchap_ctrlr_key) : NULL;
948 0 : nvme_ctrlr_unlock(ctrlr);
949 :
950 0 : AUTH_DEBUGLOG(qpair, "key=%s, hash=%u, dhgroup=%u, seq=%u, tid=%u, subnqn=%s, hostnqn=%s, "
951 : "len=%u\n", spdk_key_get_name(key), challenge->hash_id, challenge->dhg_id,
952 : challenge->seqnum, auth->tid, ctrlr->trid.subnqn, ctrlr->opts.hostnqn, hl);
953 0 : rc = spdk_nvme_dhchap_calculate(key, (enum spdk_nvmf_dhchap_hash)challenge->hash_id,
954 0 : "HostHost", challenge->seqnum, auth->tid, 0,
955 0 : ctrlr->opts.hostnqn, ctrlr->trid.subnqn,
956 0 : dhseclen > 0 ? dhsec : NULL, dhseclen,
957 0 : challenge->cval, response);
958 0 : if (rc != 0) {
959 0 : AUTH_ERRLOG(qpair, "failed to calculate response: %s\n", spdk_strerror(-rc));
960 0 : goto out;
961 : }
962 :
963 0 : if (ckey != NULL) {
964 0 : seqnum = nvme_auth_get_seqnum(qpair);
965 0 : if (seqnum == 0) {
966 0 : rc = -EIO;
967 0 : goto out;
968 : }
969 :
970 0 : assert(sizeof(ctrlr_challenge) >= hl);
971 0 : rc = RAND_bytes(ctrlr_challenge, hl);
972 0 : if (rc != 1) {
973 0 : rc = -EIO;
974 0 : goto out;
975 : }
976 :
977 0 : rc = spdk_nvme_dhchap_calculate(ckey,
978 0 : (enum spdk_nvmf_dhchap_hash)challenge->hash_id,
979 0 : "Controller", seqnum, auth->tid, 0,
980 0 : ctrlr->trid.subnqn, ctrlr->opts.hostnqn,
981 0 : dhseclen > 0 ? dhsec : NULL, dhseclen,
982 0 : ctrlr_challenge, auth->challenge);
983 0 : if (rc != 0) {
984 0 : AUTH_ERRLOG(qpair, "failed to calculate controller's response: %s\n",
985 : spdk_strerror(-rc));
986 0 : goto out;
987 : }
988 : }
989 :
990 : /* Now that the response has been calculated, send the reply */
991 0 : memset(qpair->poll_status->dma_data, 0, NVME_AUTH_DATA_SIZE);
992 0 : assert(sizeof(*reply) + 2 * hl + publen <= NVME_AUTH_DATA_SIZE);
993 0 : memcpy(reply->rval, response, hl);
994 0 : memcpy(&reply->rval[1 * hl], ctrlr_challenge, hl);
995 0 : memcpy(&reply->rval[2 * hl], pubkey, publen);
996 :
997 0 : reply->auth_type = SPDK_NVMF_AUTH_TYPE_DHCHAP;
998 0 : reply->auth_id = SPDK_NVMF_AUTH_ID_DHCHAP_REPLY;
999 0 : reply->t_id = auth->tid;
1000 0 : reply->hl = hl;
1001 0 : reply->cvalid = ckey != NULL;
1002 0 : reply->dhvlen = publen;
1003 0 : reply->seqnum = seqnum;
1004 :
1005 : /* The 2 * reply->hl below is because the spec says that both rval[hl] and cval[hl] must
1006 : * always be part of the reply message, even cvalid is zero.
1007 : */
1008 0 : rc = nvme_auth_submit_request(qpair, SPDK_NVMF_FABRIC_COMMAND_AUTHENTICATION_SEND,
1009 0 : sizeof(*reply) + 2 * reply->hl + publen);
1010 0 : out:
1011 0 : spdk_keyring_put_key(key);
1012 0 : spdk_keyring_put_key(ckey);
1013 :
1014 0 : return rc;
1015 : }
1016 :
1017 : static int
1018 0 : nvme_auth_check_success1(struct spdk_nvme_qpair *qpair)
1019 : {
1020 0 : struct spdk_nvmf_dhchap_success1 *msg = qpair->poll_status->dma_data;
1021 0 : struct spdk_nvme_ctrlr *ctrlr = qpair->ctrlr;
1022 0 : struct nvme_auth *auth = &qpair->auth;
1023 : uint8_t hl;
1024 : int rc, status;
1025 :
1026 0 : rc = nvme_auth_check_message(qpair, SPDK_NVMF_AUTH_ID_DHCHAP_SUCCESS1);
1027 0 : if (rc != 0) {
1028 0 : return rc;
1029 : }
1030 :
1031 0 : if (msg->t_id != auth->tid) {
1032 0 : AUTH_ERRLOG(qpair, "unexpected tid: received=%u, expected=%u\n",
1033 : msg->t_id, auth->tid);
1034 0 : status = SPDK_NVMF_AUTH_INCORRECT_PAYLOAD;
1035 0 : goto error;
1036 : }
1037 :
1038 0 : if (ctrlr->opts.dhchap_ctrlr_key != NULL) {
1039 0 : if (!msg->rvalid) {
1040 0 : AUTH_ERRLOG(qpair, "received rvalid=0, expected response\n");
1041 0 : status = SPDK_NVMF_AUTH_INCORRECT_PAYLOAD;
1042 0 : goto error;
1043 : }
1044 :
1045 0 : hl = spdk_nvme_dhchap_get_digest_length(auth->hash);
1046 0 : if (msg->hl != hl) {
1047 0 : AUTH_ERRLOG(qpair, "received invalid hl=%u, expected=%u\n", msg->hl, hl);
1048 0 : status = SPDK_NVMF_AUTH_INCORRECT_PAYLOAD;
1049 0 : goto error;
1050 : }
1051 :
1052 0 : if (memcmp(msg->rval, auth->challenge, hl) != 0) {
1053 0 : AUTH_ERRLOG(qpair, "controller challenge mismatch\n");
1054 0 : AUTH_LOGDUMP("received:", msg->rval, hl);
1055 0 : AUTH_LOGDUMP("expected:", auth->challenge, hl);
1056 0 : status = SPDK_NVMF_AUTH_FAILED;
1057 0 : goto error;
1058 : }
1059 : }
1060 :
1061 0 : return 0;
1062 0 : error:
1063 0 : nvme_auth_set_failure(qpair, -EACCES, nvme_auth_send_failure2(qpair, status));
1064 :
1065 0 : return -EACCES;
1066 : }
1067 :
1068 : static int
1069 0 : nvme_auth_send_success2(struct spdk_nvme_qpair *qpair)
1070 : {
1071 0 : struct spdk_nvmf_dhchap_success2 *msg = qpair->poll_status->dma_data;
1072 0 : struct nvme_auth *auth = &qpair->auth;
1073 :
1074 0 : memset(qpair->poll_status->dma_data, 0, NVME_AUTH_DATA_SIZE);
1075 0 : msg->auth_type = SPDK_NVMF_AUTH_TYPE_DHCHAP;
1076 0 : msg->auth_id = SPDK_NVMF_AUTH_ID_DHCHAP_SUCCESS2;
1077 0 : msg->t_id = auth->tid;
1078 :
1079 0 : return nvme_auth_submit_request(qpair, SPDK_NVMF_FABRIC_COMMAND_AUTHENTICATION_SEND,
1080 : sizeof(*msg));
1081 : }
1082 :
1083 : int
1084 0 : nvme_fabric_qpair_authenticate_poll(struct spdk_nvme_qpair *qpair)
1085 : {
1086 0 : struct spdk_nvme_ctrlr *ctrlr = qpair->ctrlr;
1087 0 : struct nvme_auth *auth = &qpair->auth;
1088 0 : struct nvme_completion_poll_status *status = qpair->poll_status;
1089 : enum nvme_qpair_auth_state prev_state;
1090 : int rc;
1091 :
1092 : do {
1093 0 : prev_state = auth->state;
1094 :
1095 0 : switch (auth->state) {
1096 0 : case NVME_QPAIR_AUTH_STATE_NEGOTIATE:
1097 0 : rc = nvme_auth_send_negotiate(qpair);
1098 0 : if (rc != 0) {
1099 0 : nvme_auth_set_failure(qpair, rc, false);
1100 0 : AUTH_ERRLOG(qpair, "failed to send AUTH_negotiate: %s\n",
1101 : spdk_strerror(-rc));
1102 0 : break;
1103 : }
1104 0 : nvme_auth_set_state(qpair, NVME_QPAIR_AUTH_STATE_AWAIT_NEGOTIATE);
1105 0 : break;
1106 0 : case NVME_QPAIR_AUTH_STATE_AWAIT_NEGOTIATE:
1107 0 : rc = nvme_wait_for_completion_robust_lock_timeout_poll(qpair, status, NULL);
1108 0 : if (rc != 0) {
1109 0 : if (rc != -EAGAIN) {
1110 0 : nvme_auth_print_cpl(qpair, "AUTH_negotiate");
1111 0 : nvme_auth_set_failure(qpair, rc, false);
1112 : }
1113 0 : break;
1114 : }
1115 : /* Negotiate has been sent, try to receive the challenge */
1116 0 : rc = nvme_auth_recv_message(qpair);
1117 0 : if (rc != 0) {
1118 0 : nvme_auth_set_failure(qpair, rc, false);
1119 0 : AUTH_ERRLOG(qpair, "failed to recv DH-HMAC-CHAP_challenge: %s\n",
1120 : spdk_strerror(-rc));
1121 0 : break;
1122 : }
1123 0 : nvme_auth_set_state(qpair, NVME_QPAIR_AUTH_STATE_AWAIT_CHALLENGE);
1124 0 : break;
1125 0 : case NVME_QPAIR_AUTH_STATE_AWAIT_CHALLENGE:
1126 0 : rc = nvme_wait_for_completion_robust_lock_timeout_poll(qpair, status, NULL);
1127 0 : if (rc != 0) {
1128 0 : if (rc != -EAGAIN) {
1129 0 : nvme_auth_print_cpl(qpair, "DH-HMAC-CHAP_challenge");
1130 0 : nvme_auth_set_failure(qpair, rc, false);
1131 : }
1132 0 : break;
1133 : }
1134 0 : rc = nvme_auth_check_challenge(qpair);
1135 0 : if (rc != 0) {
1136 0 : break;
1137 : }
1138 0 : rc = nvme_auth_send_reply(qpair);
1139 0 : if (rc != 0) {
1140 0 : nvme_auth_set_failure(qpair, rc, false);
1141 0 : AUTH_ERRLOG(qpair, "failed to send DH-HMAC-CHAP_reply: %s\n",
1142 : spdk_strerror(-rc));
1143 0 : break;
1144 : }
1145 0 : nvme_auth_set_state(qpair, NVME_QPAIR_AUTH_STATE_AWAIT_REPLY);
1146 0 : break;
1147 0 : case NVME_QPAIR_AUTH_STATE_AWAIT_REPLY:
1148 0 : rc = nvme_wait_for_completion_robust_lock_timeout_poll(qpair, status, NULL);
1149 0 : if (rc != 0) {
1150 0 : if (rc != -EAGAIN) {
1151 0 : nvme_auth_print_cpl(qpair, "DH-HMAC-CHAP_reply");
1152 0 : nvme_auth_set_failure(qpair, rc, false);
1153 : }
1154 0 : break;
1155 : }
1156 : /* Reply has been sent, try to receive response */
1157 0 : rc = nvme_auth_recv_message(qpair);
1158 0 : if (rc != 0) {
1159 0 : nvme_auth_set_failure(qpair, rc, false);
1160 0 : AUTH_ERRLOG(qpair, "failed to recv DH-HMAC-CHAP_success1: %s\n",
1161 : spdk_strerror(-rc));
1162 0 : break;
1163 : }
1164 0 : nvme_auth_set_state(qpair, NVME_QPAIR_AUTH_STATE_AWAIT_SUCCESS1);
1165 0 : break;
1166 0 : case NVME_QPAIR_AUTH_STATE_AWAIT_SUCCESS1:
1167 0 : rc = nvme_wait_for_completion_robust_lock_timeout_poll(qpair, status, NULL);
1168 0 : if (rc != 0) {
1169 0 : if (rc != -EAGAIN) {
1170 0 : nvme_auth_print_cpl(qpair, "DH-HMAC-CHAP_success1");
1171 0 : nvme_auth_set_failure(qpair, rc, false);
1172 : }
1173 0 : break;
1174 : }
1175 0 : rc = nvme_auth_check_success1(qpair);
1176 0 : if (rc != 0) {
1177 0 : break;
1178 : }
1179 0 : AUTH_DEBUGLOG(qpair, "authentication completed successfully\n");
1180 0 : if (ctrlr->opts.dhchap_ctrlr_key != NULL) {
1181 0 : rc = nvme_auth_send_success2(qpair);
1182 0 : if (rc != 0) {
1183 0 : AUTH_ERRLOG(qpair, "failed to send DH-HMAC-CHAP_success2: "
1184 : "%s\n", spdk_strerror(rc));
1185 0 : nvme_auth_set_failure(qpair, rc, false);
1186 0 : break;
1187 : }
1188 0 : nvme_auth_set_state(qpair, NVME_QPAIR_AUTH_STATE_AWAIT_SUCCESS2);
1189 0 : break;
1190 : }
1191 0 : nvme_auth_set_state(qpair, NVME_QPAIR_AUTH_STATE_DONE);
1192 0 : break;
1193 0 : case NVME_QPAIR_AUTH_STATE_AWAIT_SUCCESS2:
1194 : case NVME_QPAIR_AUTH_STATE_AWAIT_FAILURE2:
1195 0 : rc = nvme_wait_for_completion_robust_lock_timeout_poll(qpair, status, NULL);
1196 0 : if (rc == -EAGAIN) {
1197 0 : break;
1198 : }
1199 0 : nvme_auth_set_state(qpair, NVME_QPAIR_AUTH_STATE_DONE);
1200 0 : break;
1201 0 : case NVME_QPAIR_AUTH_STATE_DONE:
1202 0 : if (qpair->poll_status != NULL && !status->timed_out) {
1203 0 : qpair->poll_status = NULL;
1204 0 : spdk_free(status->dma_data);
1205 0 : free(status);
1206 : }
1207 0 : if (auth->cb_fn != NULL) {
1208 0 : auth->cb_fn(auth->cb_ctx, auth->status);
1209 0 : auth->cb_fn = NULL;
1210 : }
1211 0 : return auth->status;
1212 0 : default:
1213 0 : assert(0 && "invalid state");
1214 : return -EINVAL;
1215 : }
1216 0 : } while (auth->state != prev_state);
1217 :
1218 0 : return -EAGAIN;
1219 : }
1220 :
1221 : int
1222 0 : nvme_fabric_qpair_authenticate_async(struct spdk_nvme_qpair *qpair)
1223 : {
1224 0 : struct spdk_nvme_ctrlr *ctrlr = qpair->ctrlr;
1225 : struct nvme_completion_poll_status *status;
1226 0 : struct nvme_auth *auth = &qpair->auth;
1227 : int rc;
1228 :
1229 0 : if (ctrlr->opts.dhchap_key == NULL) {
1230 0 : AUTH_ERRLOG(qpair, "missing DH-HMAC-CHAP key\n");
1231 0 : return -ENOKEY;
1232 : }
1233 :
1234 0 : if (qpair->auth.flags & NVME_QPAIR_AUTH_FLAG_ASCR) {
1235 0 : AUTH_ERRLOG(qpair, "secure channel concatenation is not supported\n");
1236 0 : return -EINVAL;
1237 : }
1238 :
1239 0 : status = calloc(1, sizeof(*qpair->poll_status));
1240 0 : if (!status) {
1241 0 : AUTH_ERRLOG(qpair, "failed to allocate poll status\n");
1242 0 : return -ENOMEM;
1243 : }
1244 :
1245 0 : status->dma_data = spdk_zmalloc(NVME_AUTH_DATA_SIZE, 0, NULL, SPDK_ENV_LCORE_ID_ANY,
1246 : SPDK_MALLOC_DMA);
1247 0 : if (!status->dma_data) {
1248 0 : AUTH_ERRLOG(qpair, "failed to allocate poll status\n");
1249 0 : free(status);
1250 0 : return -ENOMEM;
1251 : }
1252 :
1253 0 : assert(qpair->poll_status == NULL);
1254 0 : qpair->poll_status = status;
1255 :
1256 0 : nvme_ctrlr_lock(ctrlr);
1257 0 : auth->tid = ctrlr->auth_tid++;
1258 0 : nvme_ctrlr_unlock(ctrlr);
1259 :
1260 0 : nvme_auth_set_state(qpair, NVME_QPAIR_AUTH_STATE_NEGOTIATE);
1261 :
1262 : /* Do the initial poll to kick-start the state machine */
1263 0 : rc = nvme_fabric_qpair_authenticate_poll(qpair);
1264 0 : return rc != -EAGAIN ? rc : 0;
1265 : }
1266 :
1267 : int
1268 0 : spdk_nvme_qpair_authenticate(struct spdk_nvme_qpair *qpair,
1269 : spdk_nvme_authenticate_cb cb_fn, void *cb_ctx)
1270 : {
1271 0 : struct spdk_nvme_ctrlr *ctrlr = qpair->ctrlr;
1272 : int rc;
1273 :
1274 0 : if (qpair->auth.cb_fn != NULL) {
1275 0 : SPDK_ERRLOG("authentication already in-progress\n");
1276 0 : return -EALREADY;
1277 : }
1278 :
1279 0 : if (ctrlr->opts.dhchap_key == NULL) {
1280 0 : SPDK_ERRLOG("missing DH-HMAC-CHAP key\n");
1281 0 : return -ENOKEY;
1282 : }
1283 :
1284 0 : rc = nvme_transport_qpair_authenticate(qpair);
1285 0 : if (rc == 0) {
1286 0 : qpair->auth.cb_fn = cb_fn;
1287 0 : qpair->auth.cb_ctx = cb_ctx;
1288 : }
1289 :
1290 0 : return rc;
1291 : }
1292 : #endif /* SPDK_CONFIG_EVP_MAC */
1293 :
1294 0 : SPDK_LOG_REGISTER_COMPONENT(nvme_auth)
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