2 * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
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
11 #include <openssl/objects.h>
12 #include <openssl/evp.h>
13 #include <openssl/engine.h>
14 #include <openssl/params.h>
15 #include <openssl/core_names.h>
16 #include "internal/cryptlib.h"
17 #include "crypto/evp.h"
18 #include "internal/provider.h"
19 #include "evp_local.h"
21 /* This call frees resources associated with the context */
22 int EVP_MD_CTX_reset(EVP_MD_CTX *ctx)
27 if (ctx->digest == NULL || ctx->digest->prov == NULL)
30 if (ctx->provctx != NULL) {
31 if (ctx->digest->freectx != NULL)
32 ctx->digest->freectx(ctx->provctx);
34 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
37 if (ctx->pctx != NULL)
42 /* TODO(3.0): Remove legacy code below */
46 * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because
47 * sometimes only copies of the context are ever finalised.
49 if (ctx->digest && ctx->digest->cleanup
50 && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED))
51 ctx->digest->cleanup(ctx);
52 if (ctx->digest && ctx->digest->ctx_size && ctx->md_data
53 && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) {
54 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
57 * pctx should be freed by the user of EVP_MD_CTX
58 * if EVP_MD_CTX_FLAG_KEEP_PKEY_CTX is set
61 /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */
62 if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX))
63 EVP_PKEY_CTX_free(ctx->pctx);
65 # ifndef OPENSSL_NO_ENGINE
66 ENGINE_finish(ctx->engine);
69 OPENSSL_cleanse(ctx, sizeof(*ctx));
74 EVP_MD_CTX *EVP_MD_CTX_new(void)
76 return OPENSSL_zalloc(sizeof(EVP_MD_CTX));
79 void EVP_MD_CTX_free(EVP_MD_CTX *ctx)
84 EVP_MD_CTX_reset(ctx);
86 EVP_MD_free(ctx->fetched_digest);
87 ctx->fetched_digest = NULL;
89 ctx->reqdigest = NULL;
95 int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
97 EVP_MD_CTX_reset(ctx);
98 return EVP_DigestInit_ex(ctx, type, NULL);
101 int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
103 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
104 ENGINE *tmpimpl = NULL;
107 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
110 ctx->reqdigest = type;
112 /* TODO(3.0): Legacy work around code below. Remove this */
113 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
115 * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
116 * this context may already have an ENGINE! Try to avoid releasing the
117 * previous handle, re-querying for an ENGINE, and having a
118 * reinitialisation, when it may all be unnecessary.
120 if (ctx->engine && ctx->digest &&
121 (type == NULL || (type->type == ctx->digest->type)))
126 * Ensure an ENGINE left lying around from last time is cleared (the
127 * previous check attempted to avoid this if the same ENGINE and
128 * EVP_MD could be used).
130 ENGINE_finish(ctx->engine);
134 if (type != NULL && impl == NULL)
135 tmpimpl = ENGINE_get_digest_engine(type->type);
139 * If there are engines involved or if we're being used as part of
140 * EVP_DigestSignInit then we should use legacy handling for now.
142 if (ctx->engine != NULL
144 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
148 || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0) {
149 if (ctx->digest == ctx->fetched_digest)
151 EVP_MD_free(ctx->fetched_digest);
152 ctx->fetched_digest = NULL;
156 if (ctx->digest != NULL && ctx->digest->ctx_size > 0) {
157 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
161 /* TODO(3.0): Start of non-legacy code below */
163 if (type->prov == NULL) {
165 /* We only do explict fetches inside the FIPS module */
166 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
169 EVP_MD *provmd = EVP_MD_fetch(NULL, OBJ_nid2sn(type->type), "");
171 if (provmd == NULL) {
172 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
176 EVP_MD_free(ctx->fetched_digest);
177 ctx->fetched_digest = provmd;
181 if (ctx->provctx != NULL && ctx->digest != NULL && ctx->digest != type) {
182 if (ctx->digest->freectx != NULL)
183 ctx->digest->freectx(ctx->provctx);
187 if (ctx->provctx == NULL) {
188 ctx->provctx = ctx->digest->newctx(ossl_provider_ctx(type->prov));
189 if (ctx->provctx == NULL) {
190 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
195 if (ctx->digest->dinit == NULL) {
196 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
200 return ctx->digest->dinit(ctx->provctx);
202 /* TODO(3.0): Remove legacy code below */
205 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
208 if (!ENGINE_init(impl)) {
209 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
213 /* Ask if an ENGINE is reserved for this job */
217 /* There's an ENGINE for this job ... (apparently) */
218 const EVP_MD *d = ENGINE_get_digest(impl, type->type);
221 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
225 /* We'll use the ENGINE's private digest definition */
228 * Store the ENGINE functional reference so we know 'type' came
229 * from an ENGINE and we need to release it when done.
236 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_NO_DIGEST_SET);
242 if (ctx->digest != type) {
243 if (ctx->digest && ctx->digest->ctx_size) {
244 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
248 if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) {
249 ctx->update = type->update;
250 ctx->md_data = OPENSSL_zalloc(type->ctx_size);
251 if (ctx->md_data == NULL) {
252 EVPerr(EVP_F_EVP_DIGESTINIT_EX, ERR_R_MALLOC_FAILURE);
257 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
262 * TODO(3.0): Temporarily no support for EVP_DigestSign* inside FIPS module
263 * or when using providers.
265 if (ctx->pctx != NULL
266 && (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx)
267 || ctx->pctx->op.sig.signature == NULL)) {
269 r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG,
270 EVP_PKEY_CTRL_DIGESTINIT, 0, ctx);
271 if (r <= 0 && (r != -2))
275 if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
277 return ctx->digest->init(ctx);
280 int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
285 if (ctx->digest == NULL || ctx->digest->prov == NULL)
288 if (ctx->digest->dupdate == NULL) {
289 EVPerr(EVP_F_EVP_DIGESTUPDATE, EVP_R_UPDATE_ERROR);
292 return ctx->digest->dupdate(ctx->provctx, data, count);
294 /* TODO(3.0): Remove legacy code below */
296 return ctx->update(ctx, data, count);
299 /* The caller can assume that this removes any secret data from the context */
300 int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
303 ret = EVP_DigestFinal_ex(ctx, md, size);
304 EVP_MD_CTX_reset(ctx);
308 /* The caller can assume that this removes any secret data from the context */
309 int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *isize)
313 size_t mdsize = EVP_MD_size(ctx->digest);
315 if (ctx->digest == NULL || ctx->digest->prov == NULL)
318 if (ctx->digest->dfinal == NULL) {
319 EVPerr(EVP_F_EVP_DIGESTFINAL_EX, EVP_R_FINAL_ERROR);
323 ret = ctx->digest->dfinal(ctx->provctx, md, &size, mdsize);
326 if (size <= UINT_MAX) {
329 EVPerr(EVP_F_EVP_DIGESTFINAL_EX, EVP_R_FINAL_ERROR);
334 EVP_MD_CTX_reset(ctx);
337 /* TODO(3.0): Remove legacy code below */
339 OPENSSL_assert(mdsize <= EVP_MAX_MD_SIZE);
340 ret = ctx->digest->final(ctx, md);
343 if (ctx->digest->cleanup) {
344 ctx->digest->cleanup(ctx);
345 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
347 OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
351 int EVP_DigestFinalXOF(EVP_MD_CTX *ctx, unsigned char *md, size_t size)
354 OSSL_PARAM params[2];
357 if (ctx->digest == NULL || ctx->digest->prov == NULL)
360 if (ctx->digest->dfinal == NULL) {
361 EVPerr(EVP_F_EVP_DIGESTFINALXOF, EVP_R_FINAL_ERROR);
365 params[i++] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &size);
366 params[i++] = OSSL_PARAM_construct_end();
368 if (EVP_MD_CTX_set_params(ctx, params) > 0)
369 ret = ctx->digest->dfinal(ctx->provctx, md, &size, size);
370 EVP_MD_CTX_reset(ctx);
374 if (ctx->digest->flags & EVP_MD_FLAG_XOF
376 && ctx->digest->md_ctrl(ctx, EVP_MD_CTRL_XOF_LEN, (int)size, NULL)) {
377 ret = ctx->digest->final(ctx, md);
378 if (ctx->digest->cleanup != NULL) {
379 ctx->digest->cleanup(ctx);
380 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
382 OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
384 EVPerr(EVP_F_EVP_DIGESTFINALXOF, EVP_R_NOT_XOF_OR_INVALID_LENGTH);
390 int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
392 EVP_MD_CTX_reset(out);
393 return EVP_MD_CTX_copy_ex(out, in);
396 int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
398 unsigned char *tmp_buf;
400 if (in == NULL || in->digest == NULL) {
401 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_INPUT_NOT_INITIALIZED);
405 if (in->digest->prov == NULL)
408 if (in->digest->dupctx == NULL) {
409 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_NOT_ABLE_TO_COPY_CTX);
413 EVP_MD_CTX_reset(out);
414 if (out->fetched_digest != NULL)
415 EVP_MD_free(out->fetched_digest);
417 /* NULL out pointers in case of error */
421 if (in->fetched_digest != NULL)
422 EVP_MD_up_ref(in->fetched_digest);
424 out->provctx = in->digest->dupctx(in->provctx);
425 if (out->provctx == NULL) {
426 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_NOT_ABLE_TO_COPY_CTX);
430 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
431 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
433 /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */
434 if (in->pctx != NULL) {
435 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
436 if (out->pctx == NULL) {
437 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_NOT_ABLE_TO_COPY_CTX);
438 EVP_MD_CTX_reset(out);
446 /* TODO(3.0): Remove legacy code below */
448 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
449 /* Make sure it's safe to copy a digest context using an ENGINE */
450 if (in->engine && !ENGINE_init(in->engine)) {
451 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_ENGINE_LIB);
456 if (out->digest == in->digest) {
457 tmp_buf = out->md_data;
458 EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE);
461 EVP_MD_CTX_reset(out);
462 memcpy(out, in, sizeof(*out));
464 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
465 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
467 /* Null these variables, since they are getting fixed up
468 * properly below. Anything else may cause a memleak and/or
469 * double free if any of the memory allocations below fail
474 if (in->md_data && out->digest->ctx_size) {
476 out->md_data = tmp_buf;
478 out->md_data = OPENSSL_malloc(out->digest->ctx_size);
479 if (out->md_data == NULL) {
480 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_MALLOC_FAILURE);
484 memcpy(out->md_data, in->md_data, out->digest->ctx_size);
487 out->update = in->update;
490 /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */
492 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
494 EVP_MD_CTX_reset(out);
500 if (out->digest->copy)
501 return out->digest->copy(out, in);
506 int EVP_Digest(const void *data, size_t count,
507 unsigned char *md, unsigned int *size, const EVP_MD *type,
510 EVP_MD_CTX *ctx = EVP_MD_CTX_new();
515 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_ONESHOT);
516 ret = EVP_DigestInit_ex(ctx, type, impl)
517 && EVP_DigestUpdate(ctx, data, count)
518 && EVP_DigestFinal_ex(ctx, md, size);
519 EVP_MD_CTX_free(ctx);
524 int EVP_MD_get_params(const EVP_MD *digest, OSSL_PARAM params[])
526 if (digest != NULL && digest->get_params != NULL)
527 return digest->get_params(params);
531 const OSSL_PARAM *EVP_MD_gettable_params(const EVP_MD *digest)
533 if (digest != NULL && digest->gettable_params != NULL)
534 return digest->gettable_params();
538 int EVP_MD_CTX_set_params(EVP_MD_CTX *ctx, const OSSL_PARAM params[])
540 if (ctx->digest != NULL && ctx->digest->set_ctx_params != NULL)
541 return ctx->digest->set_ctx_params(ctx->provctx, params);
545 const OSSL_PARAM *EVP_MD_settable_ctx_params(const EVP_MD *md)
547 if (md != NULL && md->settable_ctx_params != NULL)
548 return md->settable_ctx_params();
552 const OSSL_PARAM *EVP_MD_CTX_settable_params(EVP_MD_CTX *ctx)
555 && ctx->digest != NULL
556 && ctx->digest->settable_ctx_params != NULL)
557 return ctx->digest->settable_ctx_params();
562 int EVP_MD_CTX_get_params(EVP_MD_CTX *ctx, OSSL_PARAM params[])
564 if (ctx->digest != NULL && ctx->digest->get_params != NULL)
565 return ctx->digest->get_ctx_params(ctx->provctx, params);
569 const OSSL_PARAM *EVP_MD_gettable_ctx_params(const EVP_MD *md)
571 if (md != NULL && md->gettable_ctx_params != NULL)
572 return md->gettable_ctx_params();
576 const OSSL_PARAM *EVP_MD_CTX_gettable_params(EVP_MD_CTX *ctx)
579 && ctx->digest != NULL
580 && ctx->digest->gettable_ctx_params != NULL)
581 return ctx->digest->gettable_ctx_params();
586 /* TODO(3.0): Remove legacy code below - only used by engines & DigestSign */
587 int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2)
589 int ret = EVP_CTRL_RET_UNSUPPORTED;
592 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
594 if (ctx == NULL || ctx->digest == NULL) {
595 ERR_raise(ERR_LIB_EVP, EVP_R_MESSAGE_DIGEST_IS_NULL);
599 if (ctx->digest->prov == NULL)
603 case EVP_MD_CTRL_XOF_LEN:
605 params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &sz);
607 case EVP_MD_CTRL_MICALG:
609 params[0] = OSSL_PARAM_construct_utf8_string(OSSL_DIGEST_PARAM_MICALG,
613 return EVP_CTRL_RET_UNSUPPORTED;
617 ret = evp_do_md_ctx_setparams(ctx->digest, ctx->provctx, params);
619 ret = evp_do_md_ctx_getparams(ctx->digest, ctx->provctx, params);
623 /* TODO(3.0): Remove legacy code below */
625 if (ctx->digest->md_ctrl == NULL) {
626 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
630 ret = ctx->digest->md_ctrl(ctx, cmd, p1, p2);
636 EVP_MD *evp_md_new(void)
638 EVP_MD *md = OPENSSL_zalloc(sizeof(*md));
641 md->lock = CRYPTO_THREAD_lock_new();
642 if (md->lock == NULL) {
652 * FIPS module note: since internal fetches will be entirely
653 * provider based, we know that none of its code depends on legacy
654 * NIDs or any functionality that use them.
657 /* TODO(3.x) get rid of the need for legacy NIDs */
658 static void set_legacy_nid(const char *name, void *vlegacy_nid)
661 int *legacy_nid = vlegacy_nid;
663 if (*legacy_nid == -1) /* We found a clash already */
665 if ((nid = OBJ_sn2nid(name)) == NID_undef
666 && (nid = OBJ_ln2nid(name)) == NID_undef)
668 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
676 static void *evp_md_from_dispatch(int name_id,
677 const OSSL_DISPATCH *fns,
678 OSSL_PROVIDER *prov, void *unused)
683 /* EVP_MD_fetch() will set the legacy NID if available */
684 if ((md = evp_md_new()) == NULL) {
685 EVPerr(0, ERR_R_MALLOC_FAILURE);
690 /* TODO(3.x) get rid of the need for legacy NIDs */
691 md->type = NID_undef;
692 evp_doall_names(prov, name_id, set_legacy_nid, &md->type);
693 if (md->type == -1) {
694 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
700 md->name_id = name_id;
702 for (; fns->function_id != 0; fns++) {
703 switch (fns->function_id) {
704 case OSSL_FUNC_DIGEST_NEWCTX:
705 if (md->newctx == NULL) {
706 md->newctx = OSSL_get_OP_digest_newctx(fns);
710 case OSSL_FUNC_DIGEST_INIT:
711 if (md->dinit == NULL) {
712 md->dinit = OSSL_get_OP_digest_init(fns);
716 case OSSL_FUNC_DIGEST_UPDATE:
717 if (md->dupdate == NULL) {
718 md->dupdate = OSSL_get_OP_digest_update(fns);
722 case OSSL_FUNC_DIGEST_FINAL:
723 if (md->dfinal == NULL) {
724 md->dfinal = OSSL_get_OP_digest_final(fns);
728 case OSSL_FUNC_DIGEST_DIGEST:
729 if (md->digest == NULL)
730 md->digest = OSSL_get_OP_digest_digest(fns);
731 /* We don't increment fnct for this as it is stand alone */
733 case OSSL_FUNC_DIGEST_FREECTX:
734 if (md->freectx == NULL) {
735 md->freectx = OSSL_get_OP_digest_freectx(fns);
739 case OSSL_FUNC_DIGEST_DUPCTX:
740 if (md->dupctx == NULL)
741 md->dupctx = OSSL_get_OP_digest_dupctx(fns);
743 case OSSL_FUNC_DIGEST_GET_PARAMS:
744 if (md->get_params == NULL)
745 md->get_params = OSSL_get_OP_digest_get_params(fns);
747 case OSSL_FUNC_DIGEST_SET_CTX_PARAMS:
748 if (md->set_ctx_params == NULL)
749 md->set_ctx_params = OSSL_get_OP_digest_set_ctx_params(fns);
751 case OSSL_FUNC_DIGEST_GET_CTX_PARAMS:
752 if (md->get_ctx_params == NULL)
753 md->get_ctx_params = OSSL_get_OP_digest_get_ctx_params(fns);
755 case OSSL_FUNC_DIGEST_GETTABLE_PARAMS:
756 if (md->gettable_params == NULL)
757 md->gettable_params = OSSL_get_OP_digest_gettable_params(fns);
759 case OSSL_FUNC_DIGEST_SETTABLE_CTX_PARAMS:
760 if (md->settable_ctx_params == NULL)
761 md->settable_ctx_params =
762 OSSL_get_OP_digest_settable_ctx_params(fns);
764 case OSSL_FUNC_DIGEST_GETTABLE_CTX_PARAMS:
765 if (md->gettable_ctx_params == NULL)
766 md->gettable_ctx_params =
767 OSSL_get_OP_digest_gettable_ctx_params(fns);
771 if ((fncnt != 0 && fncnt != 5)
772 || (fncnt == 0 && md->digest == NULL)) {
774 * In order to be a consistent set of functions we either need the
775 * whole set of init/update/final etc functions or none of them.
776 * The "digest" function can standalone. We at least need one way to
780 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
785 ossl_provider_up_ref(prov);
790 static int evp_md_up_ref(void *md)
792 return EVP_MD_up_ref(md);
795 static void evp_md_free(void *md)
800 EVP_MD *EVP_MD_fetch(OPENSSL_CTX *ctx, const char *algorithm,
801 const char *properties)
804 evp_generic_fetch(ctx, OSSL_OP_DIGEST, algorithm, properties,
805 evp_md_from_dispatch, NULL, evp_md_up_ref,
811 int EVP_MD_up_ref(EVP_MD *md)
815 CRYPTO_UP_REF(&md->refcnt, &ref, md->lock);
819 void EVP_MD_free(EVP_MD *md)
826 CRYPTO_DOWN_REF(&md->refcnt, &i, md->lock);
829 ossl_provider_free(md->prov);
830 CRYPTO_THREAD_lock_free(md->lock);
834 void EVP_MD_do_all_ex(OPENSSL_CTX *libctx,
835 void (*fn)(EVP_MD *mac, void *arg),
838 evp_generic_do_all(libctx, OSSL_OP_DIGEST,
839 (void (*)(void *, void *))fn, arg,
840 evp_md_from_dispatch, NULL, evp_md_free);