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80f4fd18 | 1 | /* |
8020d79b | 2 | * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved. |
80f4fd18 SL |
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 <stdio.h> | |
11 | #include <stdlib.h> | |
12 | #include <openssl/objects.h> | |
13 | #include <openssl/evp.h> | |
14 | #include "internal/cryptlib.h" | |
80f4fd18 | 15 | #include "internal/provider.h" |
6c9bc258 TM |
16 | #include "internal/core.h" |
17 | #include "crypto/evp.h" | |
80f4fd18 SL |
18 | #include "evp_local.h" |
19 | ||
4b58d9b4 | 20 | static int evp_kem_init(EVP_PKEY_CTX *ctx, int operation, |
78c44b05 | 21 | const OSSL_PARAM params[], EVP_PKEY *authkey) |
80f4fd18 SL |
22 | { |
23 | int ret = 0; | |
24 | EVP_KEM *kem = NULL; | |
25 | EVP_KEYMGMT *tmp_keymgmt = NULL; | |
839ffdd1 | 26 | const OSSL_PROVIDER *tmp_prov = NULL; |
78c44b05 | 27 | void *provkey = NULL, *provauthkey = NULL; |
80f4fd18 | 28 | const char *supported_kem = NULL; |
839ffdd1 | 29 | int iter; |
80f4fd18 SL |
30 | |
31 | if (ctx == NULL || ctx->keytype == NULL) { | |
32 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
33 | return 0; | |
34 | } | |
35 | ||
36 | evp_pkey_ctx_free_old_ops(ctx); | |
37 | ctx->operation = operation; | |
38 | ||
433e1345 RL |
39 | if (ctx->pkey == NULL) { |
40 | ERR_raise(ERR_LIB_EVP, EVP_R_NO_KEY_SET); | |
41 | goto err; | |
42 | } | |
78c44b05 | 43 | if (authkey != NULL && authkey->type != ctx->pkey->type) { |
44 | ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_KEY_TYPES); | |
45 | return 0; | |
46 | } | |
80f4fd18 | 47 | /* |
5246183e | 48 | * Try to derive the supported kem from |ctx->keymgmt|. |
80f4fd18 | 49 | */ |
5246183e RL |
50 | if (!ossl_assert(ctx->pkey->keymgmt == NULL |
51 | || ctx->pkey->keymgmt == ctx->keymgmt)) { | |
52 | ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); | |
53 | goto err; | |
54 | } | |
55 | supported_kem = evp_keymgmt_util_query_operation_name(ctx->keymgmt, | |
56 | OSSL_OP_KEM); | |
57 | if (supported_kem == NULL) { | |
80f4fd18 SL |
58 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
59 | goto err; | |
60 | } | |
80f4fd18 | 61 | |
5246183e | 62 | /* |
839ffdd1 RL |
63 | * Because we cleared out old ops, we shouldn't need to worry about |
64 | * checking if kem is already there. | |
65 | * We perform two iterations: | |
66 | * | |
67 | * 1. Do the normal kem fetch, using the fetching data given by | |
68 | * the EVP_PKEY_CTX. | |
69 | * 2. Do the provider specific kem fetch, from the same provider | |
70 | * as |ctx->keymgmt| | |
71 | * | |
72 | * We then try to fetch the keymgmt from the same provider as the | |
73 | * kem, and try to export |ctx->pkey| to that keymgmt (when this | |
74 | * keymgmt happens to be the same as |ctx->keymgmt|, the export is | |
75 | * a no-op, but we call it anyway to not complicate the code even | |
76 | * more). | |
77 | * If the export call succeeds (returns a non-NULL provider key pointer), | |
78 | * we're done and can perform the operation itself. If not, we perform | |
79 | * the second iteration, or jump to legacy. | |
5246183e | 80 | */ |
839ffdd1 | 81 | for (iter = 1, provkey = NULL; iter < 3 && provkey == NULL; iter++) { |
dc010ca6 | 82 | EVP_KEYMGMT *tmp_keymgmt_tofree = NULL; |
839ffdd1 RL |
83 | |
84 | /* | |
85 | * If we're on the second iteration, free the results from the first. | |
86 | * They are NULL on the first iteration, so no need to check what | |
87 | * iteration we're on. | |
88 | */ | |
89 | EVP_KEM_free(kem); | |
90 | EVP_KEYMGMT_free(tmp_keymgmt); | |
91 | ||
92 | switch (iter) { | |
93 | case 1: | |
94 | kem = EVP_KEM_fetch(ctx->libctx, supported_kem, ctx->propquery); | |
95 | if (kem != NULL) | |
96 | tmp_prov = EVP_KEM_get0_provider(kem); | |
97 | break; | |
98 | case 2: | |
99 | tmp_prov = EVP_KEYMGMT_get0_provider(ctx->keymgmt); | |
100 | kem = evp_kem_fetch_from_prov((OSSL_PROVIDER *)tmp_prov, | |
101 | supported_kem, ctx->propquery); | |
102 | ||
103 | if (kem == NULL) { | |
104 | ERR_raise(ERR_LIB_EVP, | |
105 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); | |
106 | ret = -2; | |
107 | goto err; | |
108 | } | |
109 | } | |
110 | if (kem == NULL) | |
111 | continue; | |
112 | ||
113 | /* | |
114 | * Ensure that the key is provided, either natively, or as a cached | |
115 | * export. We start by fetching the keymgmt with the same name as | |
116 | * |ctx->pkey|, but from the provider of the kem method, using the | |
117 | * same property query as when fetching the kem method. | |
118 | * With the keymgmt we found (if we did), we try to export |ctx->pkey| | |
119 | * to it (evp_pkey_export_to_provider() is smart enough to only actually | |
839ffdd1 RL |
120 | * export it if |tmp_keymgmt| is different from |ctx->pkey|'s keymgmt) |
121 | */ | |
122 | tmp_keymgmt_tofree = tmp_keymgmt = | |
123 | evp_keymgmt_fetch_from_prov((OSSL_PROVIDER *)tmp_prov, | |
124 | EVP_KEYMGMT_get0_name(ctx->keymgmt), | |
125 | ctx->propquery); | |
78c44b05 | 126 | if (tmp_keymgmt != NULL) { |
839ffdd1 RL |
127 | provkey = evp_pkey_export_to_provider(ctx->pkey, ctx->libctx, |
128 | &tmp_keymgmt, ctx->propquery); | |
78c44b05 | 129 | if (provkey != NULL && authkey != NULL) { |
130 | provauthkey = evp_pkey_export_to_provider(authkey, ctx->libctx, | |
131 | &tmp_keymgmt, | |
132 | ctx->propquery); | |
133 | if (provauthkey == NULL) { | |
134 | EVP_KEM_free(kem); | |
135 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
136 | goto err; | |
137 | } | |
138 | } | |
139 | } | |
839ffdd1 RL |
140 | if (tmp_keymgmt == NULL) |
141 | EVP_KEYMGMT_free(tmp_keymgmt_tofree); | |
142 | } | |
143 | ||
5246183e | 144 | if (provkey == NULL) { |
839ffdd1 | 145 | EVP_KEM_free(kem); |
5246183e RL |
146 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
147 | goto err; | |
148 | } | |
149 | ||
80f4fd18 | 150 | ctx->op.encap.kem = kem; |
7c14d0c1 SL |
151 | ctx->op.encap.algctx = kem->newctx(ossl_provider_ctx(kem->prov)); |
152 | if (ctx->op.encap.algctx == NULL) { | |
80f4fd18 SL |
153 | /* The provider key can stay in the cache */ |
154 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
155 | goto err; | |
156 | } | |
157 | ||
158 | switch (operation) { | |
159 | case EVP_PKEY_OP_ENCAPSULATE: | |
78c44b05 | 160 | if (provauthkey != NULL && kem->auth_encapsulate_init != NULL) { |
161 | ret = kem->auth_encapsulate_init(ctx->op.encap.algctx, provkey, | |
162 | provauthkey, params); | |
163 | } else if (provauthkey == NULL && kem->encapsulate_init != NULL) { | |
164 | ret = kem->encapsulate_init(ctx->op.encap.algctx, provkey, params); | |
165 | } else { | |
80f4fd18 SL |
166 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
167 | ret = -2; | |
168 | goto err; | |
169 | } | |
80f4fd18 SL |
170 | break; |
171 | case EVP_PKEY_OP_DECAPSULATE: | |
78c44b05 | 172 | if (provauthkey != NULL && kem->auth_decapsulate_init != NULL) { |
173 | ret = kem->auth_decapsulate_init(ctx->op.encap.algctx, provkey, | |
174 | provauthkey, params); | |
175 | } else if (provauthkey == NULL && kem->encapsulate_init != NULL) { | |
176 | ret = kem->decapsulate_init(ctx->op.encap.algctx, provkey, params); | |
177 | } else { | |
80f4fd18 SL |
178 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
179 | ret = -2; | |
180 | goto err; | |
181 | } | |
80f4fd18 SL |
182 | break; |
183 | default: | |
184 | ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); | |
185 | goto err; | |
186 | } | |
187 | ||
5246183e RL |
188 | EVP_KEYMGMT_free(tmp_keymgmt); |
189 | tmp_keymgmt = NULL; | |
190 | ||
80f4fd18 SL |
191 | if (ret > 0) |
192 | return 1; | |
193 | err: | |
194 | if (ret <= 0) { | |
195 | evp_pkey_ctx_free_old_ops(ctx); | |
196 | ctx->operation = EVP_PKEY_OP_UNDEFINED; | |
197 | } | |
5246183e | 198 | EVP_KEYMGMT_free(tmp_keymgmt); |
80f4fd18 SL |
199 | return ret; |
200 | } | |
201 | ||
78c44b05 | 202 | int EVP_PKEY_auth_encapsulate_init(EVP_PKEY_CTX *ctx, EVP_PKEY *authpriv, |
203 | const OSSL_PARAM params[]) | |
204 | { | |
205 | if (authpriv == NULL) | |
206 | return 0; | |
207 | return evp_kem_init(ctx, EVP_PKEY_OP_ENCAPSULATE, params, authpriv); | |
208 | } | |
209 | ||
4b58d9b4 | 210 | int EVP_PKEY_encapsulate_init(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[]) |
80f4fd18 | 211 | { |
78c44b05 | 212 | return evp_kem_init(ctx, EVP_PKEY_OP_ENCAPSULATE, params, NULL); |
80f4fd18 SL |
213 | } |
214 | ||
215 | int EVP_PKEY_encapsulate(EVP_PKEY_CTX *ctx, | |
216 | unsigned char *out, size_t *outlen, | |
217 | unsigned char *secret, size_t *secretlen) | |
218 | { | |
219 | if (ctx == NULL) | |
220 | return 0; | |
221 | ||
222 | if (ctx->operation != EVP_PKEY_OP_ENCAPSULATE) { | |
bf23b9a1 | 223 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED); |
80f4fd18 SL |
224 | return -1; |
225 | } | |
226 | ||
7c14d0c1 | 227 | if (ctx->op.encap.algctx == NULL) { |
9311d0c4 | 228 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
80f4fd18 SL |
229 | return -2; |
230 | } | |
231 | ||
232 | if (out != NULL && secret == NULL) | |
233 | return 0; | |
234 | ||
7c14d0c1 | 235 | return ctx->op.encap.kem->encapsulate(ctx->op.encap.algctx, |
80f4fd18 SL |
236 | out, outlen, secret, secretlen); |
237 | } | |
238 | ||
4b58d9b4 | 239 | int EVP_PKEY_decapsulate_init(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[]) |
80f4fd18 | 240 | { |
78c44b05 | 241 | return evp_kem_init(ctx, EVP_PKEY_OP_DECAPSULATE, params, NULL); |
242 | } | |
243 | ||
244 | int EVP_PKEY_auth_decapsulate_init(EVP_PKEY_CTX *ctx, EVP_PKEY *authpub, | |
245 | const OSSL_PARAM params[]) | |
246 | { | |
247 | if (authpub == NULL) | |
248 | return 0; | |
249 | return evp_kem_init(ctx, EVP_PKEY_OP_DECAPSULATE, params, authpub); | |
80f4fd18 SL |
250 | } |
251 | ||
252 | int EVP_PKEY_decapsulate(EVP_PKEY_CTX *ctx, | |
253 | unsigned char *secret, size_t *secretlen, | |
254 | const unsigned char *in, size_t inlen) | |
255 | { | |
256 | if (ctx == NULL | |
257 | || (in == NULL || inlen == 0) | |
258 | || (secret == NULL && secretlen == NULL)) | |
259 | return 0; | |
260 | ||
261 | if (ctx->operation != EVP_PKEY_OP_DECAPSULATE) { | |
bf23b9a1 | 262 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED); |
80f4fd18 SL |
263 | return -1; |
264 | } | |
265 | ||
7c14d0c1 | 266 | if (ctx->op.encap.algctx == NULL) { |
9311d0c4 | 267 | ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
80f4fd18 SL |
268 | return -2; |
269 | } | |
7c14d0c1 | 270 | return ctx->op.encap.kem->decapsulate(ctx->op.encap.algctx, |
80f4fd18 SL |
271 | secret, secretlen, in, inlen); |
272 | } | |
273 | ||
274 | static EVP_KEM *evp_kem_new(OSSL_PROVIDER *prov) | |
275 | { | |
276 | EVP_KEM *kem = OPENSSL_zalloc(sizeof(EVP_KEM)); | |
277 | ||
e077455e | 278 | if (kem == NULL) |
80f4fd18 | 279 | return NULL; |
80f4fd18 SL |
280 | |
281 | kem->lock = CRYPTO_THREAD_lock_new(); | |
282 | if (kem->lock == NULL) { | |
e077455e | 283 | ERR_raise(ERR_LIB_EVP, ERR_R_CRYPTO_LIB); |
80f4fd18 SL |
284 | OPENSSL_free(kem); |
285 | return NULL; | |
286 | } | |
287 | kem->prov = prov; | |
288 | ossl_provider_up_ref(prov); | |
289 | kem->refcnt = 1; | |
290 | ||
291 | return kem; | |
292 | } | |
293 | ||
309a78aa RL |
294 | static void *evp_kem_from_algorithm(int name_id, const OSSL_ALGORITHM *algodef, |
295 | OSSL_PROVIDER *prov) | |
80f4fd18 | 296 | { |
309a78aa | 297 | const OSSL_DISPATCH *fns = algodef->implementation; |
80f4fd18 SL |
298 | EVP_KEM *kem = NULL; |
299 | int ctxfncnt = 0, encfncnt = 0, decfncnt = 0; | |
300 | int gparamfncnt = 0, sparamfncnt = 0; | |
301 | ||
302 | if ((kem = evp_kem_new(prov)) == NULL) { | |
e077455e | 303 | ERR_raise(ERR_LIB_EVP, ERR_R_EVP_LIB); |
80f4fd18 SL |
304 | goto err; |
305 | } | |
306 | ||
307 | kem->name_id = name_id; | |
6c9bc258 TM |
308 | if ((kem->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) |
309 | goto err; | |
309a78aa | 310 | kem->description = algodef->algorithm_description; |
80f4fd18 SL |
311 | |
312 | for (; fns->function_id != 0; fns++) { | |
313 | switch (fns->function_id) { | |
314 | case OSSL_FUNC_KEM_NEWCTX: | |
315 | if (kem->newctx != NULL) | |
316 | break; | |
317 | kem->newctx = OSSL_FUNC_kem_newctx(fns); | |
318 | ctxfncnt++; | |
319 | break; | |
320 | case OSSL_FUNC_KEM_ENCAPSULATE_INIT: | |
321 | if (kem->encapsulate_init != NULL) | |
322 | break; | |
323 | kem->encapsulate_init = OSSL_FUNC_kem_encapsulate_init(fns); | |
324 | encfncnt++; | |
325 | break; | |
78c44b05 | 326 | case OSSL_FUNC_KEM_AUTH_ENCAPSULATE_INIT: |
327 | if (kem->auth_encapsulate_init != NULL) | |
328 | break; | |
329 | kem->auth_encapsulate_init = OSSL_FUNC_kem_auth_encapsulate_init(fns); | |
330 | encfncnt++; | |
331 | break; | |
80f4fd18 SL |
332 | case OSSL_FUNC_KEM_ENCAPSULATE: |
333 | if (kem->encapsulate != NULL) | |
334 | break; | |
335 | kem->encapsulate = OSSL_FUNC_kem_encapsulate(fns); | |
336 | encfncnt++; | |
337 | break; | |
338 | case OSSL_FUNC_KEM_DECAPSULATE_INIT: | |
339 | if (kem->decapsulate_init != NULL) | |
340 | break; | |
341 | kem->decapsulate_init = OSSL_FUNC_kem_decapsulate_init(fns); | |
342 | decfncnt++; | |
343 | break; | |
78c44b05 | 344 | case OSSL_FUNC_KEM_AUTH_DECAPSULATE_INIT: |
345 | if (kem->auth_decapsulate_init != NULL) | |
346 | break; | |
347 | kem->auth_decapsulate_init = OSSL_FUNC_kem_auth_decapsulate_init(fns); | |
348 | decfncnt++; | |
349 | break; | |
80f4fd18 SL |
350 | case OSSL_FUNC_KEM_DECAPSULATE: |
351 | if (kem->decapsulate != NULL) | |
352 | break; | |
353 | kem->decapsulate = OSSL_FUNC_kem_decapsulate(fns); | |
354 | decfncnt++; | |
355 | break; | |
356 | case OSSL_FUNC_KEM_FREECTX: | |
357 | if (kem->freectx != NULL) | |
358 | break; | |
359 | kem->freectx = OSSL_FUNC_kem_freectx(fns); | |
360 | ctxfncnt++; | |
361 | break; | |
362 | case OSSL_FUNC_KEM_DUPCTX: | |
363 | if (kem->dupctx != NULL) | |
364 | break; | |
365 | kem->dupctx = OSSL_FUNC_kem_dupctx(fns); | |
366 | break; | |
367 | case OSSL_FUNC_KEM_GET_CTX_PARAMS: | |
368 | if (kem->get_ctx_params != NULL) | |
369 | break; | |
370 | kem->get_ctx_params | |
371 | = OSSL_FUNC_kem_get_ctx_params(fns); | |
372 | gparamfncnt++; | |
373 | break; | |
374 | case OSSL_FUNC_KEM_GETTABLE_CTX_PARAMS: | |
375 | if (kem->gettable_ctx_params != NULL) | |
376 | break; | |
377 | kem->gettable_ctx_params | |
378 | = OSSL_FUNC_kem_gettable_ctx_params(fns); | |
379 | gparamfncnt++; | |
380 | break; | |
381 | case OSSL_FUNC_KEM_SET_CTX_PARAMS: | |
382 | if (kem->set_ctx_params != NULL) | |
383 | break; | |
384 | kem->set_ctx_params | |
385 | = OSSL_FUNC_kem_set_ctx_params(fns); | |
386 | sparamfncnt++; | |
387 | break; | |
388 | case OSSL_FUNC_KEM_SETTABLE_CTX_PARAMS: | |
389 | if (kem->settable_ctx_params != NULL) | |
390 | break; | |
391 | kem->settable_ctx_params | |
392 | = OSSL_FUNC_kem_settable_ctx_params(fns); | |
393 | sparamfncnt++; | |
394 | break; | |
395 | } | |
396 | } | |
397 | if (ctxfncnt != 2 | |
78c44b05 | 398 | || (encfncnt != 0 && encfncnt != 2 && encfncnt != 3) |
399 | || (decfncnt != 0 && decfncnt != 2 && decfncnt != 3) | |
400 | || (encfncnt != decfncnt) | |
80f4fd18 SL |
401 | || (gparamfncnt != 0 && gparamfncnt != 2) |
402 | || (sparamfncnt != 0 && sparamfncnt != 2)) { | |
403 | /* | |
404 | * In order to be a consistent set of functions we must have at least | |
78c44b05 | 405 | * a set of context functions (newctx and freectx) as well as a pair |
406 | * (or triplet) of "kem" functions: | |
407 | * (encapsulate_init, (and/or auth_encapsulate_init), encapsulate) or | |
408 | * (decapsulate_init, (and/or auth_decapsulate_init), decapsulate). | |
409 | * set_ctx_params and settable_ctx_params are optional, but if one of | |
410 | * them is present then the other one must also be present. The same | |
411 | * applies to get_ctx_params and gettable_ctx_params. | |
412 | * The dupctx function is optional. | |
80f4fd18 SL |
413 | */ |
414 | ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS); | |
415 | goto err; | |
416 | } | |
417 | ||
418 | return kem; | |
419 | err: | |
420 | EVP_KEM_free(kem); | |
421 | return NULL; | |
422 | } | |
423 | ||
424 | void EVP_KEM_free(EVP_KEM *kem) | |
425 | { | |
543e740b RS |
426 | int i; |
427 | ||
428 | if (kem == NULL) | |
429 | return; | |
430 | ||
431 | CRYPTO_DOWN_REF(&kem->refcnt, &i, kem->lock); | |
432 | if (i > 0) | |
433 | return; | |
6c9bc258 | 434 | OPENSSL_free(kem->type_name); |
543e740b RS |
435 | ossl_provider_free(kem->prov); |
436 | CRYPTO_THREAD_lock_free(kem->lock); | |
437 | OPENSSL_free(kem); | |
80f4fd18 SL |
438 | } |
439 | ||
440 | int EVP_KEM_up_ref(EVP_KEM *kem) | |
441 | { | |
442 | int ref = 0; | |
443 | ||
444 | CRYPTO_UP_REF(&kem->refcnt, &ref, kem->lock); | |
445 | return 1; | |
446 | } | |
447 | ||
ed576acd | 448 | OSSL_PROVIDER *EVP_KEM_get0_provider(const EVP_KEM *kem) |
80f4fd18 SL |
449 | { |
450 | return kem->prov; | |
451 | } | |
452 | ||
b4250010 | 453 | EVP_KEM *EVP_KEM_fetch(OSSL_LIB_CTX *ctx, const char *algorithm, |
80f4fd18 SL |
454 | const char *properties) |
455 | { | |
456 | return evp_generic_fetch(ctx, OSSL_OP_KEM, algorithm, properties, | |
309a78aa | 457 | evp_kem_from_algorithm, |
80f4fd18 SL |
458 | (int (*)(void *))EVP_KEM_up_ref, |
459 | (void (*)(void *))EVP_KEM_free); | |
460 | } | |
461 | ||
ff778146 RL |
462 | EVP_KEM *evp_kem_fetch_from_prov(OSSL_PROVIDER *prov, const char *algorithm, |
463 | const char *properties) | |
464 | { | |
465 | return evp_generic_fetch_from_prov(prov, OSSL_OP_KEM, algorithm, properties, | |
466 | evp_kem_from_algorithm, | |
467 | (int (*)(void *))EVP_KEM_up_ref, | |
468 | (void (*)(void *))EVP_KEM_free); | |
469 | } | |
470 | ||
80f4fd18 SL |
471 | int EVP_KEM_is_a(const EVP_KEM *kem, const char *name) |
472 | { | |
ee8db8c5 | 473 | return kem != NULL && evp_is_a(kem->prov, kem->name_id, NULL, name); |
80f4fd18 SL |
474 | } |
475 | ||
bcd5d3a2 | 476 | int evp_kem_get_number(const EVP_KEM *kem) |
80f4fd18 SL |
477 | { |
478 | return kem->name_id; | |
479 | } | |
480 | ||
ed576acd | 481 | const char *EVP_KEM_get0_name(const EVP_KEM *kem) |
6c9bc258 TM |
482 | { |
483 | return kem->type_name; | |
484 | } | |
485 | ||
ed576acd | 486 | const char *EVP_KEM_get0_description(const EVP_KEM *kem) |
03888233 RL |
487 | { |
488 | return kem->description; | |
489 | } | |
490 | ||
b4250010 | 491 | void EVP_KEM_do_all_provided(OSSL_LIB_CTX *libctx, |
80f4fd18 SL |
492 | void (*fn)(EVP_KEM *kem, void *arg), |
493 | void *arg) | |
494 | { | |
495 | evp_generic_do_all(libctx, OSSL_OP_KEM, (void (*)(void *, void *))fn, arg, | |
309a78aa | 496 | evp_kem_from_algorithm, |
cd770738 | 497 | (int (*)(void *))EVP_KEM_up_ref, |
80f4fd18 SL |
498 | (void (*)(void *))EVP_KEM_free); |
499 | } | |
500 | ||
d84f5515 MC |
501 | int EVP_KEM_names_do_all(const EVP_KEM *kem, |
502 | void (*fn)(const char *name, void *data), | |
503 | void *data) | |
80f4fd18 SL |
504 | { |
505 | if (kem->prov != NULL) | |
d84f5515 MC |
506 | return evp_names_do_all(kem->prov, kem->name_id, fn, data); |
507 | ||
508 | return 1; | |
80f4fd18 | 509 | } |
5a950048 SL |
510 | |
511 | const OSSL_PARAM *EVP_KEM_gettable_ctx_params(const EVP_KEM *kem) | |
512 | { | |
513 | void *provctx; | |
514 | ||
515 | if (kem == NULL || kem->gettable_ctx_params == NULL) | |
516 | return NULL; | |
517 | ||
ed576acd | 518 | provctx = ossl_provider_ctx(EVP_KEM_get0_provider(kem)); |
fb67126e | 519 | return kem->gettable_ctx_params(NULL, provctx); |
5a950048 SL |
520 | } |
521 | ||
522 | const OSSL_PARAM *EVP_KEM_settable_ctx_params(const EVP_KEM *kem) | |
523 | { | |
524 | void *provctx; | |
525 | ||
526 | if (kem == NULL || kem->settable_ctx_params == NULL) | |
527 | return NULL; | |
528 | ||
ed576acd | 529 | provctx = ossl_provider_ctx(EVP_KEM_get0_provider(kem)); |
fb67126e | 530 | return kem->settable_ctx_params(NULL, provctx); |
5a950048 | 531 | } |