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ff64702b | 1 | /* |
4333b89f | 2 | * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved. |
ff64702b MC |
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/refcount.h" | |
25f2138b | 14 | #include "crypto/evp.h" |
ff64702b | 15 | #include "internal/provider.h" |
ac5a61ca | 16 | #include "internal/numbers.h" /* includes SIZE_MAX */ |
706457b7 | 17 | #include "evp_local.h" |
ff64702b MC |
18 | |
19 | static EVP_KEYEXCH *evp_keyexch_new(OSSL_PROVIDER *prov) | |
20 | { | |
21 | EVP_KEYEXCH *exchange = OPENSSL_zalloc(sizeof(EVP_KEYEXCH)); | |
22 | ||
c1ff5994 MC |
23 | if (exchange == NULL) { |
24 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); | |
25 | return NULL; | |
26 | } | |
27 | ||
ff64702b MC |
28 | exchange->lock = CRYPTO_THREAD_lock_new(); |
29 | if (exchange->lock == NULL) { | |
c1ff5994 | 30 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
ff64702b MC |
31 | OPENSSL_free(exchange); |
32 | return NULL; | |
33 | } | |
34 | exchange->prov = prov; | |
35 | ossl_provider_up_ref(prov); | |
36 | exchange->refcnt = 1; | |
37 | ||
38 | return exchange; | |
39 | } | |
40 | ||
309a78aa RL |
41 | static void *evp_keyexch_from_algorithm(int name_id, |
42 | const OSSL_ALGORITHM *algodef, | |
43 | OSSL_PROVIDER *prov) | |
ff64702b | 44 | { |
309a78aa | 45 | const OSSL_DISPATCH *fns = algodef->implementation; |
ff64702b | 46 | EVP_KEYEXCH *exchange = NULL; |
4fe54d67 | 47 | int fncnt = 0, sparamfncnt = 0, gparamfncnt = 0; |
ff64702b | 48 | |
f7c16d48 | 49 | if ((exchange = evp_keyexch_new(prov)) == NULL) { |
3ca9d210 RL |
50 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
51 | goto err; | |
6b9e3724 | 52 | } |
ff64702b | 53 | |
f7c16d48 | 54 | exchange->name_id = name_id; |
309a78aa | 55 | exchange->description = algodef->algorithm_description; |
3ca9d210 | 56 | |
ff64702b MC |
57 | for (; fns->function_id != 0; fns++) { |
58 | switch (fns->function_id) { | |
59 | case OSSL_FUNC_KEYEXCH_NEWCTX: | |
60 | if (exchange->newctx != NULL) | |
61 | break; | |
363b1e5d | 62 | exchange->newctx = OSSL_FUNC_keyexch_newctx(fns); |
ff64702b MC |
63 | fncnt++; |
64 | break; | |
65 | case OSSL_FUNC_KEYEXCH_INIT: | |
66 | if (exchange->init != NULL) | |
67 | break; | |
363b1e5d | 68 | exchange->init = OSSL_FUNC_keyexch_init(fns); |
ff64702b MC |
69 | fncnt++; |
70 | break; | |
71 | case OSSL_FUNC_KEYEXCH_SET_PEER: | |
72 | if (exchange->set_peer != NULL) | |
73 | break; | |
363b1e5d | 74 | exchange->set_peer = OSSL_FUNC_keyexch_set_peer(fns); |
ff64702b MC |
75 | break; |
76 | case OSSL_FUNC_KEYEXCH_DERIVE: | |
77 | if (exchange->derive != NULL) | |
78 | break; | |
363b1e5d | 79 | exchange->derive = OSSL_FUNC_keyexch_derive(fns); |
ff64702b MC |
80 | fncnt++; |
81 | break; | |
82 | case OSSL_FUNC_KEYEXCH_FREECTX: | |
83 | if (exchange->freectx != NULL) | |
84 | break; | |
363b1e5d | 85 | exchange->freectx = OSSL_FUNC_keyexch_freectx(fns); |
ff64702b MC |
86 | fncnt++; |
87 | break; | |
88 | case OSSL_FUNC_KEYEXCH_DUPCTX: | |
89 | if (exchange->dupctx != NULL) | |
90 | break; | |
363b1e5d | 91 | exchange->dupctx = OSSL_FUNC_keyexch_dupctx(fns); |
ff64702b | 92 | break; |
4fe54d67 NT |
93 | case OSSL_FUNC_KEYEXCH_GET_CTX_PARAMS: |
94 | if (exchange->get_ctx_params != NULL) | |
95 | break; | |
363b1e5d | 96 | exchange->get_ctx_params = OSSL_FUNC_keyexch_get_ctx_params(fns); |
4fe54d67 NT |
97 | gparamfncnt++; |
98 | break; | |
99 | case OSSL_FUNC_KEYEXCH_GETTABLE_CTX_PARAMS: | |
100 | if (exchange->gettable_ctx_params != NULL) | |
101 | break; | |
102 | exchange->gettable_ctx_params | |
363b1e5d | 103 | = OSSL_FUNC_keyexch_gettable_ctx_params(fns); |
4fe54d67 NT |
104 | gparamfncnt++; |
105 | break; | |
9c45222d MC |
106 | case OSSL_FUNC_KEYEXCH_SET_CTX_PARAMS: |
107 | if (exchange->set_ctx_params != NULL) | |
35aca9ec | 108 | break; |
363b1e5d | 109 | exchange->set_ctx_params = OSSL_FUNC_keyexch_set_ctx_params(fns); |
4fe54d67 | 110 | sparamfncnt++; |
9c45222d MC |
111 | break; |
112 | case OSSL_FUNC_KEYEXCH_SETTABLE_CTX_PARAMS: | |
113 | if (exchange->settable_ctx_params != NULL) | |
114 | break; | |
115 | exchange->settable_ctx_params | |
363b1e5d | 116 | = OSSL_FUNC_keyexch_settable_ctx_params(fns); |
4fe54d67 | 117 | sparamfncnt++; |
35aca9ec | 118 | break; |
ff64702b MC |
119 | } |
120 | } | |
4fe54d67 NT |
121 | if (fncnt != 4 |
122 | || (gparamfncnt != 0 && gparamfncnt != 2) | |
123 | || (sparamfncnt != 0 && sparamfncnt != 2)) { | |
ff64702b MC |
124 | /* |
125 | * In order to be a consistent set of functions we must have at least | |
126 | * a complete set of "exchange" functions: init, derive, newctx, | |
9c45222d MC |
127 | * and freectx. The set_ctx_params and settable_ctx_params functions are |
128 | * optional, but if one of them is present then the other one must also | |
4fe54d67 NT |
129 | * be present. Same goes for get_ctx_params and gettable_ctx_params. |
130 | * The dupctx and set_peer functions are optional. | |
ff64702b | 131 | */ |
9311d0c4 | 132 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS); |
3ca9d210 | 133 | goto err; |
ff64702b MC |
134 | } |
135 | ||
136 | return exchange; | |
3ca9d210 RL |
137 | |
138 | err: | |
139 | EVP_KEYEXCH_free(exchange); | |
3ca9d210 | 140 | return NULL; |
ff64702b MC |
141 | } |
142 | ||
143 | void EVP_KEYEXCH_free(EVP_KEYEXCH *exchange) | |
144 | { | |
543e740b RS |
145 | int i; |
146 | ||
147 | if (exchange == NULL) | |
148 | return; | |
149 | CRYPTO_DOWN_REF(&exchange->refcnt, &i, exchange->lock); | |
150 | if (i > 0) | |
151 | return; | |
152 | ossl_provider_free(exchange->prov); | |
153 | CRYPTO_THREAD_lock_free(exchange->lock); | |
154 | OPENSSL_free(exchange); | |
ff64702b MC |
155 | } |
156 | ||
157 | int EVP_KEYEXCH_up_ref(EVP_KEYEXCH *exchange) | |
158 | { | |
159 | int ref = 0; | |
160 | ||
161 | CRYPTO_UP_REF(&exchange->refcnt, &ref, exchange->lock); | |
162 | return 1; | |
163 | } | |
164 | ||
8b84b075 RL |
165 | OSSL_PROVIDER *EVP_KEYEXCH_provider(const EVP_KEYEXCH *exchange) |
166 | { | |
167 | return exchange->prov; | |
168 | } | |
169 | ||
b4250010 | 170 | EVP_KEYEXCH *EVP_KEYEXCH_fetch(OSSL_LIB_CTX *ctx, const char *algorithm, |
ff64702b MC |
171 | const char *properties) |
172 | { | |
0ddf74bf | 173 | return evp_generic_fetch(ctx, OSSL_OP_KEYEXCH, algorithm, properties, |
309a78aa | 174 | evp_keyexch_from_algorithm, |
0ddf74bf RL |
175 | (int (*)(void *))EVP_KEYEXCH_up_ref, |
176 | (void (*)(void *))EVP_KEYEXCH_free); | |
ff64702b MC |
177 | } |
178 | ||
c0e0984f | 179 | int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx) |
4b58d9b4 P |
180 | { |
181 | return EVP_PKEY_derive_init_ex(ctx, NULL); | |
182 | } | |
183 | ||
184 | int EVP_PKEY_derive_init_ex(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[]) | |
ff64702b MC |
185 | { |
186 | int ret; | |
8b84b075 | 187 | void *provkey = NULL; |
c0e0984f | 188 | EVP_KEYEXCH *exchange = NULL; |
f6aa5774 RL |
189 | EVP_KEYMGMT *tmp_keymgmt = NULL; |
190 | const char *supported_exch = NULL; | |
c0e0984f RL |
191 | |
192 | if (ctx == NULL) { | |
6d9a54c6 | 193 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
c0e0984f RL |
194 | return -2; |
195 | } | |
ff64702b | 196 | |
864b89ce | 197 | evp_pkey_ctx_free_old_ops(ctx); |
ff64702b MC |
198 | ctx->operation = EVP_PKEY_OP_DERIVE; |
199 | ||
0b9dd384 RL |
200 | /* |
201 | * TODO when we stop falling back to legacy, this and the ERR_pop_to_mark() | |
202 | * calls can be removed. | |
203 | */ | |
204 | ERR_set_mark(); | |
205 | ||
f21c9c64 | 206 | if (evp_pkey_ctx_is_legacy(ctx)) |
ff64702b MC |
207 | goto legacy; |
208 | ||
3c6ed955 RL |
209 | /* |
210 | * Ensure that the key is provided, either natively, or as a cached export. | |
ac2d58c7 | 211 | * If not, goto legacy |
3c6ed955 | 212 | */ |
f6aa5774 | 213 | tmp_keymgmt = ctx->keymgmt; |
ac2d58c7 MC |
214 | if (ctx->pkey == NULL) { |
215 | /* | |
216 | * Some algorithms (e.g. legacy KDFs) don't have a pkey - so we create | |
217 | * a blank one. | |
218 | */ | |
219 | EVP_PKEY *pkey = EVP_PKEY_new(); | |
220 | ||
221 | if (pkey == NULL || !EVP_PKEY_set_type_by_keymgmt(pkey, tmp_keymgmt)) { | |
222 | ERR_clear_last_mark(); | |
223 | EVP_PKEY_free(pkey); | |
224 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
225 | goto err; | |
226 | } | |
227 | provkey = pkey->keydata = evp_keymgmt_newdata(tmp_keymgmt); | |
228 | if (provkey == NULL) | |
229 | EVP_PKEY_free(pkey); | |
230 | else | |
231 | ctx->pkey = pkey; | |
232 | } else { | |
233 | provkey = evp_pkey_export_to_provider(ctx->pkey, ctx->libctx, | |
234 | &tmp_keymgmt, ctx->propquery); | |
235 | } | |
f6aa5774 RL |
236 | if (provkey == NULL) |
237 | goto legacy; | |
238 | if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) { | |
0b9dd384 | 239 | ERR_clear_last_mark(); |
f6aa5774 RL |
240 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
241 | goto err; | |
c0e0984f | 242 | } |
f6aa5774 RL |
243 | EVP_KEYMGMT_free(ctx->keymgmt); |
244 | ctx->keymgmt = tmp_keymgmt; | |
245 | ||
246 | if (ctx->keymgmt->query_operation_name != NULL) | |
247 | supported_exch = ctx->keymgmt->query_operation_name(OSSL_OP_KEYEXCH); | |
248 | ||
249 | /* | |
250 | * If we didn't get a supported exch, assume there is one with the | |
251 | * same name as the key type. | |
252 | */ | |
253 | if (supported_exch == NULL) | |
254 | supported_exch = ctx->keytype; | |
255 | ||
256 | /* | |
257 | * Because we cleared out old ops, we shouldn't need to worry about | |
258 | * checking if exchange is already there. | |
259 | */ | |
260 | exchange = EVP_KEYEXCH_fetch(ctx->libctx, supported_exch, ctx->propquery); | |
261 | ||
262 | if (exchange == NULL | |
c0e0984f RL |
263 | || (EVP_KEYMGMT_provider(ctx->keymgmt) |
264 | != EVP_KEYEXCH_provider(exchange))) { | |
ff64702b | 265 | /* |
0b9dd384 RL |
266 | * We don't need to free ctx->keymgmt here, as it's not necessarily |
267 | * tied to this operation. It will be freed by EVP_PKEY_CTX_free(). | |
ff64702b | 268 | */ |
c0e0984f RL |
269 | EVP_KEYEXCH_free(exchange); |
270 | goto legacy; | |
ff64702b MC |
271 | } |
272 | ||
0b9dd384 RL |
273 | /* |
274 | * TODO remove this when legacy is gone | |
275 | * If we don't have the full support we need with provided methods, | |
276 | * let's go see if legacy does. | |
277 | */ | |
278 | ERR_pop_to_mark(); | |
279 | ||
280 | /* No more legacy from here down to legacy: */ | |
c0e0984f | 281 | |
864b89ce | 282 | ctx->op.kex.exchange = exchange; |
864b89ce MC |
283 | ctx->op.kex.exchprovctx = exchange->newctx(ossl_provider_ctx(exchange->prov)); |
284 | if (ctx->op.kex.exchprovctx == NULL) { | |
8b84b075 | 285 | /* The provider key can stay in the cache */ |
9311d0c4 | 286 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
ff64702b MC |
287 | goto err; |
288 | } | |
4b58d9b4 | 289 | ret = exchange->init(ctx->op.kex.exchprovctx, provkey, params); |
ff64702b MC |
290 | |
291 | return ret ? 1 : 0; | |
292 | err: | |
c7fa9297 | 293 | evp_pkey_ctx_free_old_ops(ctx); |
ff64702b MC |
294 | ctx->operation = EVP_PKEY_OP_UNDEFINED; |
295 | return 0; | |
296 | ||
297 | legacy: | |
0b9dd384 RL |
298 | /* |
299 | * TODO remove this when legacy is gone | |
300 | * If we don't have the full support we need with provided methods, | |
301 | * let's go see if legacy does. | |
302 | */ | |
303 | ERR_pop_to_mark(); | |
304 | ||
f844f9eb | 305 | #ifdef FIPS_MODULE |
62f49b90 SL |
306 | return 0; |
307 | #else | |
e0d8523e | 308 | if (ctx->pmeth == NULL || ctx->pmeth->derive == NULL) { |
9311d0c4 | 309 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
ff64702b MC |
310 | return -2; |
311 | } | |
312 | ||
313 | if (ctx->pmeth->derive_init == NULL) | |
314 | return 1; | |
315 | ret = ctx->pmeth->derive_init(ctx); | |
316 | if (ret <= 0) | |
317 | ctx->operation = EVP_PKEY_OP_UNDEFINED; | |
318 | return ret; | |
62f49b90 | 319 | #endif |
ff64702b MC |
320 | } |
321 | ||
e454a393 SL |
322 | int EVP_PKEY_derive_set_peer_ex(EVP_PKEY_CTX *ctx, EVP_PKEY *peer, |
323 | int validate_peer) | |
ff64702b | 324 | { |
e454a393 | 325 | int ret = 0, check; |
8b84b075 | 326 | void *provkey = NULL; |
e454a393 | 327 | EVP_PKEY_CTX *check_ctx = NULL; |
ff64702b MC |
328 | |
329 | if (ctx == NULL) { | |
6d9a54c6 TM |
330 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
331 | return -1; | |
ff64702b MC |
332 | } |
333 | ||
864b89ce | 334 | if (!EVP_PKEY_CTX_IS_DERIVE_OP(ctx) || ctx->op.kex.exchprovctx == NULL) |
ff64702b MC |
335 | goto legacy; |
336 | ||
864b89ce | 337 | if (ctx->op.kex.exchange->set_peer == NULL) { |
9311d0c4 | 338 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
ff64702b MC |
339 | return -2; |
340 | } | |
341 | ||
e454a393 SL |
342 | if (validate_peer) { |
343 | check_ctx = EVP_PKEY_CTX_new_from_pkey(ctx->libctx, peer, ctx->propquery); | |
344 | if (check_ctx == NULL) | |
345 | return -1; | |
346 | check = EVP_PKEY_public_check(check_ctx); | |
347 | EVP_PKEY_CTX_free(check_ctx); | |
348 | if (check <= 0) | |
349 | return -1; | |
350 | } | |
351 | ||
3c6ed955 RL |
352 | provkey = evp_pkey_export_to_provider(peer, ctx->libctx, &ctx->keymgmt, |
353 | ctx->propquery); | |
3f7ce7f1 RL |
354 | /* |
355 | * If making the key provided wasn't possible, legacy may be able to pick | |
356 | * it up | |
357 | */ | |
e0d8523e RL |
358 | if (provkey == NULL) |
359 | goto legacy; | |
864b89ce | 360 | return ctx->op.kex.exchange->set_peer(ctx->op.kex.exchprovctx, provkey); |
ff64702b MC |
361 | |
362 | legacy: | |
f844f9eb | 363 | #ifdef FIPS_MODULE |
62f49b90 SL |
364 | return ret; |
365 | #else | |
ff64702b MC |
366 | if (ctx->pmeth == NULL |
367 | || !(ctx->pmeth->derive != NULL | |
368 | || ctx->pmeth->encrypt != NULL | |
369 | || ctx->pmeth->decrypt != NULL) | |
370 | || ctx->pmeth->ctrl == NULL) { | |
9311d0c4 | 371 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
ff64702b MC |
372 | return -2; |
373 | } | |
374 | if (ctx->operation != EVP_PKEY_OP_DERIVE | |
375 | && ctx->operation != EVP_PKEY_OP_ENCRYPT | |
376 | && ctx->operation != EVP_PKEY_OP_DECRYPT) { | |
bf23b9a1 | 377 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED); |
ff64702b MC |
378 | return -1; |
379 | } | |
380 | ||
381 | ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 0, peer); | |
382 | ||
383 | if (ret <= 0) | |
384 | return ret; | |
385 | ||
386 | if (ret == 2) | |
387 | return 1; | |
388 | ||
389 | if (ctx->pkey == NULL) { | |
9311d0c4 | 390 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_KEY_SET); |
ff64702b MC |
391 | return -1; |
392 | } | |
393 | ||
394 | if (ctx->pkey->type != peer->type) { | |
9311d0c4 | 395 | ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_KEY_TYPES); |
ff64702b MC |
396 | return -1; |
397 | } | |
398 | ||
399 | /* | |
400 | * For clarity. The error is if parameters in peer are | |
c74aaa39 | 401 | * present (!missing) but don't match. EVP_PKEY_parameters_eq may return |
ff64702b MC |
402 | * 1 (match), 0 (don't match) and -2 (comparison is not defined). -1 |
403 | * (different key types) is impossible here because it is checked earlier. | |
404 | * -2 is OK for us here, as well as 1, so we can check for 0 only. | |
405 | */ | |
406 | if (!EVP_PKEY_missing_parameters(peer) && | |
c74aaa39 | 407 | !EVP_PKEY_parameters_eq(ctx->pkey, peer)) { |
9311d0c4 | 408 | ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_PARAMETERS); |
ff64702b MC |
409 | return -1; |
410 | } | |
411 | ||
412 | EVP_PKEY_free(ctx->peerkey); | |
413 | ctx->peerkey = peer; | |
414 | ||
415 | ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 1, peer); | |
416 | ||
417 | if (ret <= 0) { | |
418 | ctx->peerkey = NULL; | |
419 | return ret; | |
420 | } | |
421 | ||
422 | EVP_PKEY_up_ref(peer); | |
423 | return 1; | |
62f49b90 | 424 | #endif |
ff64702b MC |
425 | } |
426 | ||
e454a393 SL |
427 | int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer) |
428 | { | |
429 | return EVP_PKEY_derive_set_peer_ex(ctx, peer, 1); | |
430 | } | |
431 | ||
ff64702b MC |
432 | int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *pkeylen) |
433 | { | |
434 | int ret; | |
435 | ||
6d9a54c6 TM |
436 | if (ctx == NULL || pkeylen == NULL) { |
437 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); | |
438 | return -1; | |
ff64702b MC |
439 | } |
440 | ||
864b89ce | 441 | if (!EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) { |
bf23b9a1 | 442 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED); |
ff64702b MC |
443 | return -1; |
444 | } | |
445 | ||
864b89ce | 446 | if (ctx->op.kex.exchprovctx == NULL) |
ff64702b MC |
447 | goto legacy; |
448 | ||
864b89ce | 449 | ret = ctx->op.kex.exchange->derive(ctx->op.kex.exchprovctx, key, pkeylen, |
6d9a54c6 | 450 | key != NULL ? *pkeylen : 0); |
ff64702b MC |
451 | |
452 | return ret; | |
453 | legacy: | |
6d9a54c6 | 454 | if (ctx->pmeth == NULL || ctx->pmeth->derive == NULL) { |
9311d0c4 | 455 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
ff64702b MC |
456 | return -2; |
457 | } | |
458 | ||
459 | M_check_autoarg(ctx, key, pkeylen, EVP_F_EVP_PKEY_DERIVE) | |
460 | return ctx->pmeth->derive(ctx, key, pkeylen); | |
461 | } | |
251e610c | 462 | |
506cb0f6 RL |
463 | int EVP_KEYEXCH_number(const EVP_KEYEXCH *keyexch) |
464 | { | |
465 | return keyexch->name_id; | |
466 | } | |
467 | ||
03888233 RL |
468 | const char *EVP_KEYEXCH_description(const EVP_KEYEXCH *keyexch) |
469 | { | |
470 | return keyexch->description; | |
471 | } | |
472 | ||
251e610c RL |
473 | int EVP_KEYEXCH_is_a(const EVP_KEYEXCH *keyexch, const char *name) |
474 | { | |
e4a1d023 | 475 | return evp_is_a(keyexch->prov, keyexch->name_id, NULL, name); |
251e610c RL |
476 | } |
477 | ||
b4250010 | 478 | void EVP_KEYEXCH_do_all_provided(OSSL_LIB_CTX *libctx, |
251e610c RL |
479 | void (*fn)(EVP_KEYEXCH *keyexch, void *arg), |
480 | void *arg) | |
481 | { | |
251e610c RL |
482 | evp_generic_do_all(libctx, OSSL_OP_KEYEXCH, |
483 | (void (*)(void *, void *))fn, arg, | |
309a78aa | 484 | evp_keyexch_from_algorithm, |
251e610c RL |
485 | (void (*)(void *))EVP_KEYEXCH_free); |
486 | } | |
f651c727 | 487 | |
d84f5515 MC |
488 | int EVP_KEYEXCH_names_do_all(const EVP_KEYEXCH *keyexch, |
489 | void (*fn)(const char *name, void *data), | |
490 | void *data) | |
f651c727 RL |
491 | { |
492 | if (keyexch->prov != NULL) | |
d84f5515 MC |
493 | return evp_names_do_all(keyexch->prov, keyexch->name_id, fn, data); |
494 | ||
495 | return 1; | |
f651c727 | 496 | } |
e3efe7a5 SL |
497 | |
498 | const OSSL_PARAM *EVP_KEYEXCH_gettable_ctx_params(const EVP_KEYEXCH *keyexch) | |
499 | { | |
500 | void *provctx; | |
501 | ||
502 | if (keyexch == NULL || keyexch->gettable_ctx_params == NULL) | |
503 | return NULL; | |
504 | ||
505 | provctx = ossl_provider_ctx(EVP_KEYEXCH_provider(keyexch)); | |
fb67126e | 506 | return keyexch->gettable_ctx_params(NULL, provctx); |
e3efe7a5 SL |
507 | } |
508 | ||
509 | const OSSL_PARAM *EVP_KEYEXCH_settable_ctx_params(const EVP_KEYEXCH *keyexch) | |
510 | { | |
511 | void *provctx; | |
512 | ||
513 | if (keyexch == NULL || keyexch->settable_ctx_params == NULL) | |
514 | return NULL; | |
515 | provctx = ossl_provider_ctx(EVP_KEYEXCH_provider(keyexch)); | |
fb67126e | 516 | return keyexch->settable_ctx_params(NULL, provctx); |
e3efe7a5 | 517 | } |