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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" | |
ff64702b | 14 | #include "internal/provider.h" |
6c9bc258 | 15 | #include "internal/core.h" |
ac5a61ca | 16 | #include "internal/numbers.h" /* includes SIZE_MAX */ |
6c9bc258 | 17 | #include "crypto/evp.h" |
706457b7 | 18 | #include "evp_local.h" |
ff64702b MC |
19 | |
20 | static EVP_KEYEXCH *evp_keyexch_new(OSSL_PROVIDER *prov) | |
21 | { | |
22 | EVP_KEYEXCH *exchange = OPENSSL_zalloc(sizeof(EVP_KEYEXCH)); | |
23 | ||
c1ff5994 MC |
24 | if (exchange == NULL) { |
25 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); | |
26 | return NULL; | |
27 | } | |
28 | ||
ff64702b MC |
29 | exchange->lock = CRYPTO_THREAD_lock_new(); |
30 | if (exchange->lock == NULL) { | |
c1ff5994 | 31 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
ff64702b MC |
32 | OPENSSL_free(exchange); |
33 | return NULL; | |
34 | } | |
35 | exchange->prov = prov; | |
36 | ossl_provider_up_ref(prov); | |
37 | exchange->refcnt = 1; | |
38 | ||
39 | return exchange; | |
40 | } | |
41 | ||
309a78aa RL |
42 | static void *evp_keyexch_from_algorithm(int name_id, |
43 | const OSSL_ALGORITHM *algodef, | |
44 | OSSL_PROVIDER *prov) | |
ff64702b | 45 | { |
309a78aa | 46 | const OSSL_DISPATCH *fns = algodef->implementation; |
ff64702b | 47 | EVP_KEYEXCH *exchange = NULL; |
4fe54d67 | 48 | int fncnt = 0, sparamfncnt = 0, gparamfncnt = 0; |
ff64702b | 49 | |
f7c16d48 | 50 | if ((exchange = evp_keyexch_new(prov)) == NULL) { |
3ca9d210 RL |
51 | ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
52 | goto err; | |
6b9e3724 | 53 | } |
ff64702b | 54 | |
f7c16d48 | 55 | exchange->name_id = name_id; |
6c9bc258 TM |
56 | if ((exchange->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) |
57 | goto err; | |
309a78aa | 58 | exchange->description = algodef->algorithm_description; |
3ca9d210 | 59 | |
ff64702b MC |
60 | for (; fns->function_id != 0; fns++) { |
61 | switch (fns->function_id) { | |
62 | case OSSL_FUNC_KEYEXCH_NEWCTX: | |
63 | if (exchange->newctx != NULL) | |
64 | break; | |
363b1e5d | 65 | exchange->newctx = OSSL_FUNC_keyexch_newctx(fns); |
ff64702b MC |
66 | fncnt++; |
67 | break; | |
68 | case OSSL_FUNC_KEYEXCH_INIT: | |
69 | if (exchange->init != NULL) | |
70 | break; | |
363b1e5d | 71 | exchange->init = OSSL_FUNC_keyexch_init(fns); |
ff64702b MC |
72 | fncnt++; |
73 | break; | |
74 | case OSSL_FUNC_KEYEXCH_SET_PEER: | |
75 | if (exchange->set_peer != NULL) | |
76 | break; | |
363b1e5d | 77 | exchange->set_peer = OSSL_FUNC_keyexch_set_peer(fns); |
ff64702b MC |
78 | break; |
79 | case OSSL_FUNC_KEYEXCH_DERIVE: | |
80 | if (exchange->derive != NULL) | |
81 | break; | |
363b1e5d | 82 | exchange->derive = OSSL_FUNC_keyexch_derive(fns); |
ff64702b MC |
83 | fncnt++; |
84 | break; | |
85 | case OSSL_FUNC_KEYEXCH_FREECTX: | |
86 | if (exchange->freectx != NULL) | |
87 | break; | |
363b1e5d | 88 | exchange->freectx = OSSL_FUNC_keyexch_freectx(fns); |
ff64702b MC |
89 | fncnt++; |
90 | break; | |
91 | case OSSL_FUNC_KEYEXCH_DUPCTX: | |
92 | if (exchange->dupctx != NULL) | |
93 | break; | |
363b1e5d | 94 | exchange->dupctx = OSSL_FUNC_keyexch_dupctx(fns); |
ff64702b | 95 | break; |
4fe54d67 NT |
96 | case OSSL_FUNC_KEYEXCH_GET_CTX_PARAMS: |
97 | if (exchange->get_ctx_params != NULL) | |
98 | break; | |
363b1e5d | 99 | exchange->get_ctx_params = OSSL_FUNC_keyexch_get_ctx_params(fns); |
4fe54d67 NT |
100 | gparamfncnt++; |
101 | break; | |
102 | case OSSL_FUNC_KEYEXCH_GETTABLE_CTX_PARAMS: | |
103 | if (exchange->gettable_ctx_params != NULL) | |
104 | break; | |
105 | exchange->gettable_ctx_params | |
363b1e5d | 106 | = OSSL_FUNC_keyexch_gettable_ctx_params(fns); |
4fe54d67 NT |
107 | gparamfncnt++; |
108 | break; | |
9c45222d MC |
109 | case OSSL_FUNC_KEYEXCH_SET_CTX_PARAMS: |
110 | if (exchange->set_ctx_params != NULL) | |
35aca9ec | 111 | break; |
363b1e5d | 112 | exchange->set_ctx_params = OSSL_FUNC_keyexch_set_ctx_params(fns); |
4fe54d67 | 113 | sparamfncnt++; |
9c45222d MC |
114 | break; |
115 | case OSSL_FUNC_KEYEXCH_SETTABLE_CTX_PARAMS: | |
116 | if (exchange->settable_ctx_params != NULL) | |
117 | break; | |
118 | exchange->settable_ctx_params | |
363b1e5d | 119 | = OSSL_FUNC_keyexch_settable_ctx_params(fns); |
4fe54d67 | 120 | sparamfncnt++; |
35aca9ec | 121 | break; |
ff64702b MC |
122 | } |
123 | } | |
4fe54d67 NT |
124 | if (fncnt != 4 |
125 | || (gparamfncnt != 0 && gparamfncnt != 2) | |
126 | || (sparamfncnt != 0 && sparamfncnt != 2)) { | |
ff64702b MC |
127 | /* |
128 | * In order to be a consistent set of functions we must have at least | |
129 | * a complete set of "exchange" functions: init, derive, newctx, | |
9c45222d MC |
130 | * and freectx. The set_ctx_params and settable_ctx_params functions are |
131 | * optional, but if one of them is present then the other one must also | |
4fe54d67 NT |
132 | * be present. Same goes for get_ctx_params and gettable_ctx_params. |
133 | * The dupctx and set_peer functions are optional. | |
ff64702b | 134 | */ |
9311d0c4 | 135 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS); |
3ca9d210 | 136 | goto err; |
ff64702b MC |
137 | } |
138 | ||
139 | return exchange; | |
3ca9d210 RL |
140 | |
141 | err: | |
142 | EVP_KEYEXCH_free(exchange); | |
3ca9d210 | 143 | return NULL; |
ff64702b MC |
144 | } |
145 | ||
146 | void EVP_KEYEXCH_free(EVP_KEYEXCH *exchange) | |
147 | { | |
543e740b RS |
148 | int i; |
149 | ||
150 | if (exchange == NULL) | |
151 | return; | |
152 | CRYPTO_DOWN_REF(&exchange->refcnt, &i, exchange->lock); | |
153 | if (i > 0) | |
154 | return; | |
6c9bc258 | 155 | OPENSSL_free(exchange->type_name); |
543e740b RS |
156 | ossl_provider_free(exchange->prov); |
157 | CRYPTO_THREAD_lock_free(exchange->lock); | |
158 | OPENSSL_free(exchange); | |
ff64702b MC |
159 | } |
160 | ||
161 | int EVP_KEYEXCH_up_ref(EVP_KEYEXCH *exchange) | |
162 | { | |
163 | int ref = 0; | |
164 | ||
165 | CRYPTO_UP_REF(&exchange->refcnt, &ref, exchange->lock); | |
166 | return 1; | |
167 | } | |
168 | ||
ed576acd | 169 | OSSL_PROVIDER *EVP_KEYEXCH_get0_provider(const EVP_KEYEXCH *exchange) |
8b84b075 RL |
170 | { |
171 | return exchange->prov; | |
172 | } | |
173 | ||
b4250010 | 174 | EVP_KEYEXCH *EVP_KEYEXCH_fetch(OSSL_LIB_CTX *ctx, const char *algorithm, |
ff64702b MC |
175 | const char *properties) |
176 | { | |
0ddf74bf | 177 | return evp_generic_fetch(ctx, OSSL_OP_KEYEXCH, algorithm, properties, |
309a78aa | 178 | evp_keyexch_from_algorithm, |
0ddf74bf RL |
179 | (int (*)(void *))EVP_KEYEXCH_up_ref, |
180 | (void (*)(void *))EVP_KEYEXCH_free); | |
ff64702b MC |
181 | } |
182 | ||
c0e0984f | 183 | int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx) |
4b58d9b4 P |
184 | { |
185 | return EVP_PKEY_derive_init_ex(ctx, NULL); | |
186 | } | |
187 | ||
188 | int EVP_PKEY_derive_init_ex(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[]) | |
ff64702b MC |
189 | { |
190 | int ret; | |
8b84b075 | 191 | void *provkey = NULL; |
c0e0984f | 192 | EVP_KEYEXCH *exchange = NULL; |
f6aa5774 RL |
193 | EVP_KEYMGMT *tmp_keymgmt = NULL; |
194 | const char *supported_exch = NULL; | |
c0e0984f RL |
195 | |
196 | if (ctx == NULL) { | |
6d9a54c6 | 197 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
c0e0984f RL |
198 | return -2; |
199 | } | |
ff64702b | 200 | |
864b89ce | 201 | evp_pkey_ctx_free_old_ops(ctx); |
ff64702b MC |
202 | ctx->operation = EVP_PKEY_OP_DERIVE; |
203 | ||
0b9dd384 RL |
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 | |
ed576acd TM |
263 | || (EVP_KEYMGMT_get0_provider(ctx->keymgmt) |
264 | != EVP_KEYEXCH_get0_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 | 273 | /* |
0b9dd384 RL |
274 | * If we don't have the full support we need with provided methods, |
275 | * let's go see if legacy does. | |
276 | */ | |
277 | ERR_pop_to_mark(); | |
278 | ||
279 | /* No more legacy from here down to legacy: */ | |
c0e0984f | 280 | |
864b89ce | 281 | ctx->op.kex.exchange = exchange; |
7c14d0c1 SL |
282 | ctx->op.kex.algctx = exchange->newctx(ossl_provider_ctx(exchange->prov)); |
283 | if (ctx->op.kex.algctx == NULL) { | |
8b84b075 | 284 | /* The provider key can stay in the cache */ |
9311d0c4 | 285 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
ff64702b MC |
286 | goto err; |
287 | } | |
7c14d0c1 | 288 | ret = exchange->init(ctx->op.kex.algctx, provkey, params); |
ff64702b MC |
289 | |
290 | return ret ? 1 : 0; | |
291 | err: | |
c7fa9297 | 292 | evp_pkey_ctx_free_old_ops(ctx); |
ff64702b MC |
293 | ctx->operation = EVP_PKEY_OP_UNDEFINED; |
294 | return 0; | |
295 | ||
296 | legacy: | |
0b9dd384 | 297 | /* |
0b9dd384 RL |
298 | * If we don't have the full support we need with provided methods, |
299 | * let's go see if legacy does. | |
300 | */ | |
301 | ERR_pop_to_mark(); | |
302 | ||
f844f9eb | 303 | #ifdef FIPS_MODULE |
62f49b90 SL |
304 | return 0; |
305 | #else | |
e0d8523e | 306 | if (ctx->pmeth == NULL || ctx->pmeth->derive == NULL) { |
9311d0c4 | 307 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
ff64702b MC |
308 | return -2; |
309 | } | |
310 | ||
311 | if (ctx->pmeth->derive_init == NULL) | |
312 | return 1; | |
313 | ret = ctx->pmeth->derive_init(ctx); | |
314 | if (ret <= 0) | |
315 | ctx->operation = EVP_PKEY_OP_UNDEFINED; | |
316 | return ret; | |
62f49b90 | 317 | #endif |
ff64702b MC |
318 | } |
319 | ||
e454a393 SL |
320 | int EVP_PKEY_derive_set_peer_ex(EVP_PKEY_CTX *ctx, EVP_PKEY *peer, |
321 | int validate_peer) | |
ff64702b | 322 | { |
e454a393 | 323 | int ret = 0, check; |
8b84b075 | 324 | void *provkey = NULL; |
e454a393 | 325 | EVP_PKEY_CTX *check_ctx = NULL; |
ff64702b MC |
326 | |
327 | if (ctx == NULL) { | |
6d9a54c6 TM |
328 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
329 | return -1; | |
ff64702b MC |
330 | } |
331 | ||
7c14d0c1 | 332 | if (!EVP_PKEY_CTX_IS_DERIVE_OP(ctx) || ctx->op.kex.algctx == NULL) |
ff64702b MC |
333 | goto legacy; |
334 | ||
864b89ce | 335 | if (ctx->op.kex.exchange->set_peer == NULL) { |
9311d0c4 | 336 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
ff64702b MC |
337 | return -2; |
338 | } | |
339 | ||
e454a393 SL |
340 | if (validate_peer) { |
341 | check_ctx = EVP_PKEY_CTX_new_from_pkey(ctx->libctx, peer, ctx->propquery); | |
342 | if (check_ctx == NULL) | |
343 | return -1; | |
344 | check = EVP_PKEY_public_check(check_ctx); | |
345 | EVP_PKEY_CTX_free(check_ctx); | |
346 | if (check <= 0) | |
347 | return -1; | |
348 | } | |
349 | ||
3c6ed955 RL |
350 | provkey = evp_pkey_export_to_provider(peer, ctx->libctx, &ctx->keymgmt, |
351 | ctx->propquery); | |
3f7ce7f1 RL |
352 | /* |
353 | * If making the key provided wasn't possible, legacy may be able to pick | |
354 | * it up | |
355 | */ | |
e0d8523e RL |
356 | if (provkey == NULL) |
357 | goto legacy; | |
7c14d0c1 | 358 | return ctx->op.kex.exchange->set_peer(ctx->op.kex.algctx, provkey); |
ff64702b MC |
359 | |
360 | legacy: | |
f844f9eb | 361 | #ifdef FIPS_MODULE |
62f49b90 SL |
362 | return ret; |
363 | #else | |
ff64702b MC |
364 | if (ctx->pmeth == NULL |
365 | || !(ctx->pmeth->derive != NULL | |
366 | || ctx->pmeth->encrypt != NULL | |
367 | || ctx->pmeth->decrypt != NULL) | |
368 | || ctx->pmeth->ctrl == NULL) { | |
9311d0c4 | 369 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
ff64702b MC |
370 | return -2; |
371 | } | |
372 | if (ctx->operation != EVP_PKEY_OP_DERIVE | |
373 | && ctx->operation != EVP_PKEY_OP_ENCRYPT | |
374 | && ctx->operation != EVP_PKEY_OP_DECRYPT) { | |
bf23b9a1 | 375 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED); |
ff64702b MC |
376 | return -1; |
377 | } | |
378 | ||
379 | ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 0, peer); | |
380 | ||
381 | if (ret <= 0) | |
382 | return ret; | |
383 | ||
384 | if (ret == 2) | |
385 | return 1; | |
386 | ||
387 | if (ctx->pkey == NULL) { | |
9311d0c4 | 388 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_KEY_SET); |
ff64702b MC |
389 | return -1; |
390 | } | |
391 | ||
392 | if (ctx->pkey->type != peer->type) { | |
9311d0c4 | 393 | ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_KEY_TYPES); |
ff64702b MC |
394 | return -1; |
395 | } | |
396 | ||
397 | /* | |
398 | * For clarity. The error is if parameters in peer are | |
c74aaa39 | 399 | * present (!missing) but don't match. EVP_PKEY_parameters_eq may return |
ff64702b MC |
400 | * 1 (match), 0 (don't match) and -2 (comparison is not defined). -1 |
401 | * (different key types) is impossible here because it is checked earlier. | |
402 | * -2 is OK for us here, as well as 1, so we can check for 0 only. | |
403 | */ | |
404 | if (!EVP_PKEY_missing_parameters(peer) && | |
c74aaa39 | 405 | !EVP_PKEY_parameters_eq(ctx->pkey, peer)) { |
9311d0c4 | 406 | ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_PARAMETERS); |
ff64702b MC |
407 | return -1; |
408 | } | |
409 | ||
410 | EVP_PKEY_free(ctx->peerkey); | |
411 | ctx->peerkey = peer; | |
412 | ||
413 | ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 1, peer); | |
414 | ||
415 | if (ret <= 0) { | |
416 | ctx->peerkey = NULL; | |
417 | return ret; | |
418 | } | |
419 | ||
420 | EVP_PKEY_up_ref(peer); | |
421 | return 1; | |
62f49b90 | 422 | #endif |
ff64702b MC |
423 | } |
424 | ||
e454a393 SL |
425 | int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer) |
426 | { | |
427 | return EVP_PKEY_derive_set_peer_ex(ctx, peer, 1); | |
428 | } | |
429 | ||
ff64702b MC |
430 | int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *pkeylen) |
431 | { | |
432 | int ret; | |
433 | ||
6d9a54c6 TM |
434 | if (ctx == NULL || pkeylen == NULL) { |
435 | ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); | |
436 | return -1; | |
ff64702b MC |
437 | } |
438 | ||
864b89ce | 439 | if (!EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) { |
bf23b9a1 | 440 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED); |
ff64702b MC |
441 | return -1; |
442 | } | |
443 | ||
7c14d0c1 | 444 | if (ctx->op.kex.algctx == NULL) |
ff64702b MC |
445 | goto legacy; |
446 | ||
7c14d0c1 | 447 | ret = ctx->op.kex.exchange->derive(ctx->op.kex.algctx, key, pkeylen, |
6d9a54c6 | 448 | key != NULL ? *pkeylen : 0); |
ff64702b MC |
449 | |
450 | return ret; | |
451 | legacy: | |
6d9a54c6 | 452 | if (ctx->pmeth == NULL || ctx->pmeth->derive == NULL) { |
9311d0c4 | 453 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
ff64702b MC |
454 | return -2; |
455 | } | |
456 | ||
457 | M_check_autoarg(ctx, key, pkeylen, EVP_F_EVP_PKEY_DERIVE) | |
458 | return ctx->pmeth->derive(ctx, key, pkeylen); | |
459 | } | |
251e610c | 460 | |
ed576acd | 461 | int EVP_KEYEXCH_get_number(const EVP_KEYEXCH *keyexch) |
506cb0f6 RL |
462 | { |
463 | return keyexch->name_id; | |
464 | } | |
465 | ||
ed576acd | 466 | const char *EVP_KEYEXCH_get0_name(const EVP_KEYEXCH *keyexch) |
6c9bc258 TM |
467 | { |
468 | return keyexch->type_name; | |
469 | } | |
470 | ||
ed576acd | 471 | const char *EVP_KEYEXCH_get0_description(const EVP_KEYEXCH *keyexch) |
03888233 RL |
472 | { |
473 | return keyexch->description; | |
474 | } | |
475 | ||
251e610c RL |
476 | int EVP_KEYEXCH_is_a(const EVP_KEYEXCH *keyexch, const char *name) |
477 | { | |
e4a1d023 | 478 | return evp_is_a(keyexch->prov, keyexch->name_id, NULL, name); |
251e610c RL |
479 | } |
480 | ||
b4250010 | 481 | void EVP_KEYEXCH_do_all_provided(OSSL_LIB_CTX *libctx, |
251e610c RL |
482 | void (*fn)(EVP_KEYEXCH *keyexch, void *arg), |
483 | void *arg) | |
484 | { | |
251e610c RL |
485 | evp_generic_do_all(libctx, OSSL_OP_KEYEXCH, |
486 | (void (*)(void *, void *))fn, arg, | |
309a78aa | 487 | evp_keyexch_from_algorithm, |
251e610c RL |
488 | (void (*)(void *))EVP_KEYEXCH_free); |
489 | } | |
f651c727 | 490 | |
d84f5515 MC |
491 | int EVP_KEYEXCH_names_do_all(const EVP_KEYEXCH *keyexch, |
492 | void (*fn)(const char *name, void *data), | |
493 | void *data) | |
f651c727 RL |
494 | { |
495 | if (keyexch->prov != NULL) | |
d84f5515 MC |
496 | return evp_names_do_all(keyexch->prov, keyexch->name_id, fn, data); |
497 | ||
498 | return 1; | |
f651c727 | 499 | } |
e3efe7a5 SL |
500 | |
501 | const OSSL_PARAM *EVP_KEYEXCH_gettable_ctx_params(const EVP_KEYEXCH *keyexch) | |
502 | { | |
503 | void *provctx; | |
504 | ||
505 | if (keyexch == NULL || keyexch->gettable_ctx_params == NULL) | |
506 | return NULL; | |
507 | ||
ed576acd | 508 | provctx = ossl_provider_ctx(EVP_KEYEXCH_get0_provider(keyexch)); |
fb67126e | 509 | return keyexch->gettable_ctx_params(NULL, provctx); |
e3efe7a5 SL |
510 | } |
511 | ||
512 | const OSSL_PARAM *EVP_KEYEXCH_settable_ctx_params(const EVP_KEYEXCH *keyexch) | |
513 | { | |
514 | void *provctx; | |
515 | ||
516 | if (keyexch == NULL || keyexch->settable_ctx_params == NULL) | |
517 | return NULL; | |
ed576acd | 518 | provctx = ossl_provider_ctx(EVP_KEYEXCH_get0_provider(keyexch)); |
fb67126e | 519 | return keyexch->settable_ctx_params(NULL, provctx); |
e3efe7a5 | 520 | } |