1 /*
2 * Copyright 2019-2023 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <openssl/crypto.h>
11 #include <openssl/evp.h>
12 #include <openssl/err.h>
13 #include "internal/cryptlib.h"
14 #include "internal/refcount.h"
15 #include "internal/provider.h"
16 #include "internal/core.h"
17 #include "internal/numbers.h" /* includes SIZE_MAX */
18 #include "crypto/evp.h"
19 #include "evp_local.h"
20
evp_keyexch_new(OSSL_PROVIDER * prov)21 static EVP_KEYEXCH *evp_keyexch_new(OSSL_PROVIDER *prov)
22 {
23 EVP_KEYEXCH *exchange = OPENSSL_zalloc(sizeof(EVP_KEYEXCH));
24
25 if (exchange == NULL)
26 return NULL;
27
28 if (!CRYPTO_NEW_REF(&exchange->refcnt, 1)) {
29 OPENSSL_free(exchange);
30 return NULL;
31 }
32 exchange->prov = prov;
33 ossl_provider_up_ref(prov);
34
35 return exchange;
36 }
37
evp_keyexch_from_algorithm(int name_id,const OSSL_ALGORITHM * algodef,OSSL_PROVIDER * prov)38 static void *evp_keyexch_from_algorithm(int name_id,
39 const OSSL_ALGORITHM *algodef,
40 OSSL_PROVIDER *prov)
41 {
42 const OSSL_DISPATCH *fns = algodef->implementation;
43 EVP_KEYEXCH *exchange = NULL;
44 int fncnt = 0, sparamfncnt = 0, gparamfncnt = 0;
45
46 if ((exchange = evp_keyexch_new(prov)) == NULL) {
47 ERR_raise(ERR_LIB_EVP, ERR_R_EVP_LIB);
48 goto err;
49 }
50
51 exchange->name_id = name_id;
52 if ((exchange->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL)
53 goto err;
54 exchange->description = algodef->algorithm_description;
55
56 for (; fns->function_id != 0; fns++) {
57 switch (fns->function_id) {
58 case OSSL_FUNC_KEYEXCH_NEWCTX:
59 if (exchange->newctx != NULL)
60 break;
61 exchange->newctx = OSSL_FUNC_keyexch_newctx(fns);
62 fncnt++;
63 break;
64 case OSSL_FUNC_KEYEXCH_INIT:
65 if (exchange->init != NULL)
66 break;
67 exchange->init = OSSL_FUNC_keyexch_init(fns);
68 fncnt++;
69 break;
70 case OSSL_FUNC_KEYEXCH_SET_PEER:
71 if (exchange->set_peer != NULL)
72 break;
73 exchange->set_peer = OSSL_FUNC_keyexch_set_peer(fns);
74 break;
75 case OSSL_FUNC_KEYEXCH_DERIVE:
76 if (exchange->derive != NULL)
77 break;
78 exchange->derive = OSSL_FUNC_keyexch_derive(fns);
79 fncnt++;
80 break;
81 case OSSL_FUNC_KEYEXCH_FREECTX:
82 if (exchange->freectx != NULL)
83 break;
84 exchange->freectx = OSSL_FUNC_keyexch_freectx(fns);
85 fncnt++;
86 break;
87 case OSSL_FUNC_KEYEXCH_DUPCTX:
88 if (exchange->dupctx != NULL)
89 break;
90 exchange->dupctx = OSSL_FUNC_keyexch_dupctx(fns);
91 break;
92 case OSSL_FUNC_KEYEXCH_GET_CTX_PARAMS:
93 if (exchange->get_ctx_params != NULL)
94 break;
95 exchange->get_ctx_params = OSSL_FUNC_keyexch_get_ctx_params(fns);
96 gparamfncnt++;
97 break;
98 case OSSL_FUNC_KEYEXCH_GETTABLE_CTX_PARAMS:
99 if (exchange->gettable_ctx_params != NULL)
100 break;
101 exchange->gettable_ctx_params
102 = OSSL_FUNC_keyexch_gettable_ctx_params(fns);
103 gparamfncnt++;
104 break;
105 case OSSL_FUNC_KEYEXCH_SET_CTX_PARAMS:
106 if (exchange->set_ctx_params != NULL)
107 break;
108 exchange->set_ctx_params = OSSL_FUNC_keyexch_set_ctx_params(fns);
109 sparamfncnt++;
110 break;
111 case OSSL_FUNC_KEYEXCH_SETTABLE_CTX_PARAMS:
112 if (exchange->settable_ctx_params != NULL)
113 break;
114 exchange->settable_ctx_params
115 = OSSL_FUNC_keyexch_settable_ctx_params(fns);
116 sparamfncnt++;
117 break;
118 }
119 }
120 if (fncnt != 4
121 || (gparamfncnt != 0 && gparamfncnt != 2)
122 || (sparamfncnt != 0 && sparamfncnt != 2)) {
123 /*
124 * In order to be a consistent set of functions we must have at least
125 * a complete set of "exchange" functions: init, derive, newctx,
126 * and freectx. The set_ctx_params and settable_ctx_params functions are
127 * optional, but if one of them is present then the other one must also
128 * be present. Same goes for get_ctx_params and gettable_ctx_params.
129 * The dupctx and set_peer functions are optional.
130 */
131 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
132 goto err;
133 }
134
135 return exchange;
136
137 err:
138 EVP_KEYEXCH_free(exchange);
139 return NULL;
140 }
141
EVP_KEYEXCH_free(EVP_KEYEXCH * exchange)142 void EVP_KEYEXCH_free(EVP_KEYEXCH *exchange)
143 {
144 int i;
145
146 if (exchange == NULL)
147 return;
148 CRYPTO_DOWN_REF(&exchange->refcnt, &i);
149 if (i > 0)
150 return;
151 OPENSSL_free(exchange->type_name);
152 ossl_provider_free(exchange->prov);
153 CRYPTO_FREE_REF(&exchange->refcnt);
154 OPENSSL_free(exchange);
155 }
156
EVP_KEYEXCH_up_ref(EVP_KEYEXCH * exchange)157 int EVP_KEYEXCH_up_ref(EVP_KEYEXCH *exchange)
158 {
159 int ref = 0;
160
161 CRYPTO_UP_REF(&exchange->refcnt, &ref);
162 return 1;
163 }
164
EVP_KEYEXCH_get0_provider(const EVP_KEYEXCH * exchange)165 OSSL_PROVIDER *EVP_KEYEXCH_get0_provider(const EVP_KEYEXCH *exchange)
166 {
167 return exchange->prov;
168 }
169
EVP_KEYEXCH_fetch(OSSL_LIB_CTX * ctx,const char * algorithm,const char * properties)170 EVP_KEYEXCH *EVP_KEYEXCH_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
171 const char *properties)
172 {
173 return evp_generic_fetch(ctx, OSSL_OP_KEYEXCH, algorithm, properties,
174 evp_keyexch_from_algorithm,
175 (int (*)(void *))EVP_KEYEXCH_up_ref,
176 (void (*)(void *))EVP_KEYEXCH_free);
177 }
178
evp_keyexch_fetch_from_prov(OSSL_PROVIDER * prov,const char * algorithm,const char * properties)179 EVP_KEYEXCH *evp_keyexch_fetch_from_prov(OSSL_PROVIDER *prov,
180 const char *algorithm,
181 const char *properties)
182 {
183 return evp_generic_fetch_from_prov(prov, OSSL_OP_KEYEXCH,
184 algorithm, properties,
185 evp_keyexch_from_algorithm,
186 (int (*)(void *))EVP_KEYEXCH_up_ref,
187 (void (*)(void *))EVP_KEYEXCH_free);
188 }
189
EVP_PKEY_derive_init(EVP_PKEY_CTX * ctx)190 int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx)
191 {
192 return EVP_PKEY_derive_init_ex(ctx, NULL);
193 }
194
EVP_PKEY_derive_init_ex(EVP_PKEY_CTX * ctx,const OSSL_PARAM params[])195 int EVP_PKEY_derive_init_ex(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[])
196 {
197 int ret;
198 void *provkey = NULL;
199 EVP_KEYEXCH *exchange = NULL;
200 EVP_KEYMGMT *tmp_keymgmt = NULL;
201 const OSSL_PROVIDER *tmp_prov = NULL;
202 const char *supported_exch = NULL;
203 int iter;
204
205 if (ctx == NULL) {
206 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
207 return -2;
208 }
209
210 evp_pkey_ctx_free_old_ops(ctx);
211 ctx->operation = EVP_PKEY_OP_DERIVE;
212
213 ERR_set_mark();
214
215 if (evp_pkey_ctx_is_legacy(ctx))
216 goto legacy;
217
218 /*
219 * Some algorithms (e.g. legacy KDFs) don't have a pkey - so we create
220 * a blank one.
221 */
222 if (ctx->pkey == NULL) {
223 EVP_PKEY *pkey = EVP_PKEY_new();
224
225 if (pkey == NULL
226 || !EVP_PKEY_set_type_by_keymgmt(pkey, ctx->keymgmt)
227 || (pkey->keydata = evp_keymgmt_newdata(ctx->keymgmt)) == NULL) {
228 ERR_clear_last_mark();
229 EVP_PKEY_free(pkey);
230 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
231 goto err;
232 }
233 ctx->pkey = pkey;
234 }
235
236 /*
237 * Try to derive the supported exch from |ctx->keymgmt|.
238 */
239 if (!ossl_assert(ctx->pkey->keymgmt == NULL
240 || ctx->pkey->keymgmt == ctx->keymgmt)) {
241 ERR_clear_last_mark();
242 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
243 goto err;
244 }
245 supported_exch = evp_keymgmt_util_query_operation_name(ctx->keymgmt,
246 OSSL_OP_KEYEXCH);
247 if (supported_exch == NULL) {
248 ERR_clear_last_mark();
249 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
250 goto err;
251 }
252
253
254 /*
255 * We perform two iterations:
256 *
257 * 1. Do the normal exchange fetch, using the fetching data given by
258 * the EVP_PKEY_CTX.
259 * 2. Do the provider specific exchange fetch, from the same provider
260 * as |ctx->keymgmt|
261 *
262 * We then try to fetch the keymgmt from the same provider as the
263 * exchange, and try to export |ctx->pkey| to that keymgmt (when
264 * this keymgmt happens to be the same as |ctx->keymgmt|, the export
265 * is a no-op, but we call it anyway to not complicate the code even
266 * more).
267 * If the export call succeeds (returns a non-NULL provider key pointer),
268 * we're done and can perform the operation itself. If not, we perform
269 * the second iteration, or jump to legacy.
270 */
271 for (iter = 1, provkey = NULL; iter < 3 && provkey == NULL; iter++) {
272 EVP_KEYMGMT *tmp_keymgmt_tofree = NULL;
273
274 /*
275 * If we're on the second iteration, free the results from the first.
276 * They are NULL on the first iteration, so no need to check what
277 * iteration we're on.
278 */
279 EVP_KEYEXCH_free(exchange);
280 EVP_KEYMGMT_free(tmp_keymgmt);
281
282 switch (iter) {
283 case 1:
284 exchange =
285 EVP_KEYEXCH_fetch(ctx->libctx, supported_exch, ctx->propquery);
286 if (exchange != NULL)
287 tmp_prov = EVP_KEYEXCH_get0_provider(exchange);
288 break;
289 case 2:
290 tmp_prov = EVP_KEYMGMT_get0_provider(ctx->keymgmt);
291 exchange =
292 evp_keyexch_fetch_from_prov((OSSL_PROVIDER *)tmp_prov,
293 supported_exch, ctx->propquery);
294 if (exchange == NULL)
295 goto legacy;
296 break;
297 }
298 if (exchange == NULL)
299 continue;
300
301 /*
302 * Ensure that the key is provided, either natively, or as a cached
303 * export. We start by fetching the keymgmt with the same name as
304 * |ctx->keymgmt|, but from the provider of the exchange method, using
305 * the same property query as when fetching the exchange method.
306 * With the keymgmt we found (if we did), we try to export |ctx->pkey|
307 * to it (evp_pkey_export_to_provider() is smart enough to only actually
308 * export it if |tmp_keymgmt| is different from |ctx->pkey|'s keymgmt)
309 */
310 tmp_keymgmt_tofree = tmp_keymgmt =
311 evp_keymgmt_fetch_from_prov((OSSL_PROVIDER *)tmp_prov,
312 EVP_KEYMGMT_get0_name(ctx->keymgmt),
313 ctx->propquery);
314 if (tmp_keymgmt != NULL)
315 provkey = evp_pkey_export_to_provider(ctx->pkey, ctx->libctx,
316 &tmp_keymgmt, ctx->propquery);
317 if (tmp_keymgmt == NULL)
318 EVP_KEYMGMT_free(tmp_keymgmt_tofree);
319 }
320
321 if (provkey == NULL) {
322 EVP_KEYEXCH_free(exchange);
323 goto legacy;
324 }
325
326 ERR_pop_to_mark();
327
328 /* No more legacy from here down to legacy: */
329
330 /* A Coverity false positive with up_ref/down_ref and free */
331 /* coverity[use_after_free] */
332 ctx->op.kex.exchange = exchange;
333 /* A Coverity false positive with up_ref/down_ref and free */
334 /* coverity[deref_arg] */
335 ctx->op.kex.algctx = exchange->newctx(ossl_provider_ctx(exchange->prov));
336 if (ctx->op.kex.algctx == NULL) {
337 /* The provider key can stay in the cache */
338 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
339 goto err;
340 }
341 ret = exchange->init(ctx->op.kex.algctx, provkey, params);
342
343 EVP_KEYMGMT_free(tmp_keymgmt);
344 return ret ? 1 : 0;
345 err:
346 evp_pkey_ctx_free_old_ops(ctx);
347 ctx->operation = EVP_PKEY_OP_UNDEFINED;
348 EVP_KEYMGMT_free(tmp_keymgmt);
349 return 0;
350
351 legacy:
352 /*
353 * If we don't have the full support we need with provided methods,
354 * let's go see if legacy does.
355 */
356 ERR_pop_to_mark();
357
358 #ifdef FIPS_MODULE
359 return 0;
360 #else
361 if (ctx->pmeth == NULL || ctx->pmeth->derive == NULL) {
362 ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
363 return -2;
364 }
365
366 if (ctx->pmeth->derive_init == NULL)
367 return 1;
368 ret = ctx->pmeth->derive_init(ctx);
369 if (ret <= 0)
370 ctx->operation = EVP_PKEY_OP_UNDEFINED;
371 EVP_KEYMGMT_free(tmp_keymgmt);
372 return ret;
373 #endif
374 }
375
EVP_PKEY_derive_set_peer_ex(EVP_PKEY_CTX * ctx,EVP_PKEY * peer,int validate_peer)376 int EVP_PKEY_derive_set_peer_ex(EVP_PKEY_CTX *ctx, EVP_PKEY *peer,
377 int validate_peer)
378 {
379 int ret = 0, check;
380 void *provkey = NULL;
381 EVP_PKEY_CTX *check_ctx = NULL;
382 EVP_KEYMGMT *tmp_keymgmt = NULL, *tmp_keymgmt_tofree = NULL;
383
384 if (ctx == NULL) {
385 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
386 return -1;
387 }
388
389 if (!EVP_PKEY_CTX_IS_DERIVE_OP(ctx) || ctx->op.kex.algctx == NULL)
390 goto legacy;
391
392 if (ctx->op.kex.exchange->set_peer == NULL) {
393 ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
394 return -2;
395 }
396
397 if (validate_peer) {
398 check_ctx = EVP_PKEY_CTX_new_from_pkey(ctx->libctx, peer, ctx->propquery);
399 if (check_ctx == NULL)
400 return -1;
401 check = EVP_PKEY_public_check(check_ctx);
402 EVP_PKEY_CTX_free(check_ctx);
403 if (check <= 0)
404 return -1;
405 }
406
407 /*
408 * Ensure that the |peer| is provided, either natively, or as a cached
409 * export. We start by fetching the keymgmt with the same name as
410 * |ctx->keymgmt|, but from the provider of the exchange method, using
411 * the same property query as when fetching the exchange method.
412 * With the keymgmt we found (if we did), we try to export |peer|
413 * to it (evp_pkey_export_to_provider() is smart enough to only actually
414 * export it if |tmp_keymgmt| is different from |peer|'s keymgmt)
415 */
416 tmp_keymgmt_tofree = tmp_keymgmt =
417 evp_keymgmt_fetch_from_prov((OSSL_PROVIDER *)
418 EVP_KEYEXCH_get0_provider(ctx->op.kex.exchange),
419 EVP_KEYMGMT_get0_name(ctx->keymgmt),
420 ctx->propquery);
421 if (tmp_keymgmt != NULL)
422 /* A Coverity issue with up_ref/down_ref and free */
423 /* coverity[pass_freed_arg] */
424 provkey = evp_pkey_export_to_provider(peer, ctx->libctx,
425 &tmp_keymgmt, ctx->propquery);
426 EVP_KEYMGMT_free(tmp_keymgmt_tofree);
427
428 /*
429 * If making the key provided wasn't possible, legacy may be able to pick
430 * it up
431 */
432 if (provkey == NULL)
433 goto legacy;
434 return ctx->op.kex.exchange->set_peer(ctx->op.kex.algctx, provkey);
435
436 legacy:
437 #ifdef FIPS_MODULE
438 return ret;
439 #else
440 if (ctx->pmeth == NULL
441 || !(ctx->pmeth->derive != NULL
442 || ctx->pmeth->encrypt != NULL
443 || ctx->pmeth->decrypt != NULL)
444 || ctx->pmeth->ctrl == NULL) {
445 ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
446 return -2;
447 }
448 if (ctx->operation != EVP_PKEY_OP_DERIVE
449 && ctx->operation != EVP_PKEY_OP_ENCRYPT
450 && ctx->operation != EVP_PKEY_OP_DECRYPT) {
451 ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
452 return -1;
453 }
454
455 ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 0, peer);
456
457 if (ret <= 0)
458 return ret;
459
460 if (ret == 2)
461 return 1;
462
463 if (ctx->pkey == NULL) {
464 ERR_raise(ERR_LIB_EVP, EVP_R_NO_KEY_SET);
465 return -1;
466 }
467
468 if (ctx->pkey->type != peer->type) {
469 ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_KEY_TYPES);
470 return -1;
471 }
472
473 /*
474 * For clarity. The error is if parameters in peer are
475 * present (!missing) but don't match. EVP_PKEY_parameters_eq may return
476 * 1 (match), 0 (don't match) and -2 (comparison is not defined). -1
477 * (different key types) is impossible here because it is checked earlier.
478 * -2 is OK for us here, as well as 1, so we can check for 0 only.
479 */
480 if (!EVP_PKEY_missing_parameters(peer) &&
481 !EVP_PKEY_parameters_eq(ctx->pkey, peer)) {
482 ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_PARAMETERS);
483 return -1;
484 }
485
486 EVP_PKEY_free(ctx->peerkey);
487 ctx->peerkey = peer;
488
489 ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 1, peer);
490
491 if (ret <= 0) {
492 ctx->peerkey = NULL;
493 return ret;
494 }
495
496 EVP_PKEY_up_ref(peer);
497 return 1;
498 #endif
499 }
500
EVP_PKEY_derive_set_peer(EVP_PKEY_CTX * ctx,EVP_PKEY * peer)501 int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer)
502 {
503 return EVP_PKEY_derive_set_peer_ex(ctx, peer, 1);
504 }
505
EVP_PKEY_derive(EVP_PKEY_CTX * ctx,unsigned char * key,size_t * pkeylen)506 int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *pkeylen)
507 {
508 int ret;
509
510 if (ctx == NULL || pkeylen == NULL) {
511 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
512 return -1;
513 }
514
515 if (!EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
516 ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
517 return -1;
518 }
519
520 if (ctx->op.kex.algctx == NULL)
521 goto legacy;
522
523 ret = ctx->op.kex.exchange->derive(ctx->op.kex.algctx, key, pkeylen,
524 key != NULL ? *pkeylen : 0);
525
526 return ret;
527 legacy:
528 if (ctx->pmeth == NULL || ctx->pmeth->derive == NULL) {
529 ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
530 return -2;
531 }
532
533 M_check_autoarg(ctx, key, pkeylen, EVP_F_EVP_PKEY_DERIVE)
534 return ctx->pmeth->derive(ctx, key, pkeylen);
535 }
536
evp_keyexch_get_number(const EVP_KEYEXCH * keyexch)537 int evp_keyexch_get_number(const EVP_KEYEXCH *keyexch)
538 {
539 return keyexch->name_id;
540 }
541
EVP_KEYEXCH_get0_name(const EVP_KEYEXCH * keyexch)542 const char *EVP_KEYEXCH_get0_name(const EVP_KEYEXCH *keyexch)
543 {
544 return keyexch->type_name;
545 }
546
EVP_KEYEXCH_get0_description(const EVP_KEYEXCH * keyexch)547 const char *EVP_KEYEXCH_get0_description(const EVP_KEYEXCH *keyexch)
548 {
549 return keyexch->description;
550 }
551
EVP_KEYEXCH_is_a(const EVP_KEYEXCH * keyexch,const char * name)552 int EVP_KEYEXCH_is_a(const EVP_KEYEXCH *keyexch, const char *name)
553 {
554 return keyexch != NULL
555 && evp_is_a(keyexch->prov, keyexch->name_id, NULL, name);
556 }
557
EVP_KEYEXCH_do_all_provided(OSSL_LIB_CTX * libctx,void (* fn)(EVP_KEYEXCH * keyexch,void * arg),void * arg)558 void EVP_KEYEXCH_do_all_provided(OSSL_LIB_CTX *libctx,
559 void (*fn)(EVP_KEYEXCH *keyexch, void *arg),
560 void *arg)
561 {
562 evp_generic_do_all(libctx, OSSL_OP_KEYEXCH,
563 (void (*)(void *, void *))fn, arg,
564 evp_keyexch_from_algorithm,
565 (int (*)(void *))EVP_KEYEXCH_up_ref,
566 (void (*)(void *))EVP_KEYEXCH_free);
567 }
568
EVP_KEYEXCH_names_do_all(const EVP_KEYEXCH * keyexch,void (* fn)(const char * name,void * data),void * data)569 int EVP_KEYEXCH_names_do_all(const EVP_KEYEXCH *keyexch,
570 void (*fn)(const char *name, void *data),
571 void *data)
572 {
573 if (keyexch->prov != NULL)
574 return evp_names_do_all(keyexch->prov, keyexch->name_id, fn, data);
575
576 return 1;
577 }
578
EVP_KEYEXCH_gettable_ctx_params(const EVP_KEYEXCH * keyexch)579 const OSSL_PARAM *EVP_KEYEXCH_gettable_ctx_params(const EVP_KEYEXCH *keyexch)
580 {
581 void *provctx;
582
583 if (keyexch == NULL || keyexch->gettable_ctx_params == NULL)
584 return NULL;
585
586 provctx = ossl_provider_ctx(EVP_KEYEXCH_get0_provider(keyexch));
587 return keyexch->gettable_ctx_params(NULL, provctx);
588 }
589
EVP_KEYEXCH_settable_ctx_params(const EVP_KEYEXCH * keyexch)590 const OSSL_PARAM *EVP_KEYEXCH_settable_ctx_params(const EVP_KEYEXCH *keyexch)
591 {
592 void *provctx;
593
594 if (keyexch == NULL || keyexch->settable_ctx_params == NULL)
595 return NULL;
596 provctx = ossl_provider_ctx(EVP_KEYEXCH_get0_provider(keyexch));
597 return keyexch->settable_ctx_params(NULL, provctx);
598 }
599
