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)
28 /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */
30 * pctx should be freed by the user of EVP_MD_CTX
31 * if EVP_MD_CTX_FLAG_KEEP_PKEY_CTX is set
33 if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX))
34 EVP_PKEY_CTX_free(ctx->pctx);
37 if (ctx->digest == NULL || ctx->digest->prov == NULL)
40 if (ctx->provctx != NULL) {
41 if (ctx->digest->freectx != NULL)
42 ctx->digest->freectx(ctx->provctx);
44 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
47 if (ctx->pctx != NULL)
52 /* TODO(3.0): Remove legacy code below */
56 * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because
57 * sometimes only copies of the context are ever finalised.
59 if (ctx->digest && ctx->digest->cleanup
60 && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED))
61 ctx->digest->cleanup(ctx);
62 if (ctx->digest && ctx->digest->ctx_size && ctx->md_data
63 && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) {
64 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
67 #if !defined(FIPS_MODE) && !defined(OPENSSL_NO_ENGINE)
68 ENGINE_finish(ctx->engine);
70 OPENSSL_cleanse(ctx, sizeof(*ctx));
75 EVP_MD_CTX *EVP_MD_CTX_new(void)
77 return OPENSSL_zalloc(sizeof(EVP_MD_CTX));
80 void EVP_MD_CTX_free(EVP_MD_CTX *ctx)
85 EVP_MD_CTX_reset(ctx);
87 EVP_MD_free(ctx->fetched_digest);
88 ctx->fetched_digest = NULL;
90 ctx->reqdigest = NULL;
96 int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
98 EVP_MD_CTX_reset(ctx);
99 return EVP_DigestInit_ex(ctx, type, NULL);
102 int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
104 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
105 ENGINE *tmpimpl = NULL;
108 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
110 if (ctx->provctx != NULL) {
111 if (!ossl_assert(ctx->digest != NULL)) {
112 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
115 if (ctx->digest->freectx != NULL)
116 ctx->digest->freectx(ctx->provctx);
121 ctx->reqdigest = type;
123 /* TODO(3.0): Legacy work around code below. Remove this */
124 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
126 * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
127 * this context may already have an ENGINE! Try to avoid releasing the
128 * previous handle, re-querying for an ENGINE, and having a
129 * reinitialisation, when it may all be unnecessary.
131 if (ctx->engine && ctx->digest &&
132 (type == NULL || (type->type == ctx->digest->type)))
137 * Ensure an ENGINE left lying around from last time is cleared (the
138 * previous check attempted to avoid this if the same ENGINE and
139 * EVP_MD could be used).
141 ENGINE_finish(ctx->engine);
145 if (type != NULL && impl == NULL)
146 tmpimpl = ENGINE_get_digest_engine(type->type);
150 * If there are engines involved or if we're being used as part of
151 * EVP_DigestSignInit then we should use legacy handling for now.
153 if (ctx->engine != NULL
155 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
159 || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0) {
160 if (ctx->digest == ctx->fetched_digest)
162 EVP_MD_free(ctx->fetched_digest);
163 ctx->fetched_digest = NULL;
167 if (ctx->digest != NULL && ctx->digest->ctx_size > 0) {
168 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
172 /* TODO(3.0): Start of non-legacy code below */
174 if (type->prov == NULL) {
176 /* We only do explict fetches inside the FIPS module */
177 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
180 EVP_MD *provmd = EVP_MD_fetch(NULL, OBJ_nid2sn(type->type), "");
182 if (provmd == NULL) {
183 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
187 EVP_MD_free(ctx->fetched_digest);
188 ctx->fetched_digest = provmd;
192 if (ctx->provctx != NULL && ctx->digest != NULL && ctx->digest != type) {
193 if (ctx->digest->freectx != NULL)
194 ctx->digest->freectx(ctx->provctx);
198 if (ctx->provctx == NULL) {
199 ctx->provctx = ctx->digest->newctx(ossl_provider_ctx(type->prov));
200 if (ctx->provctx == NULL) {
201 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
206 if (ctx->digest->dinit == NULL) {
207 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
211 return ctx->digest->dinit(ctx->provctx);
213 /* TODO(3.0): Remove legacy code below */
216 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
219 if (!ENGINE_init(impl)) {
220 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
224 /* Ask if an ENGINE is reserved for this job */
228 /* There's an ENGINE for this job ... (apparently) */
229 const EVP_MD *d = ENGINE_get_digest(impl, type->type);
232 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
236 /* We'll use the ENGINE's private digest definition */
239 * Store the ENGINE functional reference so we know 'type' came
240 * from an ENGINE and we need to release it when done.
247 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_NO_DIGEST_SET);
253 if (ctx->digest != type) {
254 if (ctx->digest && ctx->digest->ctx_size) {
255 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
259 if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) {
260 ctx->update = type->update;
261 ctx->md_data = OPENSSL_zalloc(type->ctx_size);
262 if (ctx->md_data == NULL) {
263 EVPerr(EVP_F_EVP_DIGESTINIT_EX, ERR_R_MALLOC_FAILURE);
268 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
273 * TODO(3.0): Temporarily no support for EVP_DigestSign* inside FIPS module
274 * or when using providers.
276 if (ctx->pctx != NULL
277 && (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx)
278 || ctx->pctx->op.sig.signature == NULL)) {
280 r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG,
281 EVP_PKEY_CTRL_DIGESTINIT, 0, ctx);
282 if (r <= 0 && (r != -2))
286 if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
288 return ctx->digest->init(ctx);
291 int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
296 if (ctx->digest == NULL || ctx->digest->prov == NULL)
299 if (ctx->digest->dupdate == NULL) {
300 EVPerr(EVP_F_EVP_DIGESTUPDATE, EVP_R_UPDATE_ERROR);
303 return ctx->digest->dupdate(ctx->provctx, data, count);
305 /* TODO(3.0): Remove legacy code below */
307 return ctx->update(ctx, data, count);
310 /* The caller can assume that this removes any secret data from the context */
311 int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
314 ret = EVP_DigestFinal_ex(ctx, md, size);
315 EVP_MD_CTX_reset(ctx);
319 /* The caller can assume that this removes any secret data from the context */
320 int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *isize)
324 size_t mdsize = EVP_MD_size(ctx->digest);
326 if (ctx->digest == NULL || ctx->digest->prov == NULL)
329 if (ctx->digest->dfinal == NULL) {
330 EVPerr(EVP_F_EVP_DIGESTFINAL_EX, EVP_R_FINAL_ERROR);
334 ret = ctx->digest->dfinal(ctx->provctx, md, &size, mdsize);
337 if (size <= UINT_MAX) {
340 EVPerr(EVP_F_EVP_DIGESTFINAL_EX, EVP_R_FINAL_ERROR);
347 /* TODO(3.0): Remove legacy code below */
349 OPENSSL_assert(mdsize <= EVP_MAX_MD_SIZE);
350 ret = ctx->digest->final(ctx, md);
353 if (ctx->digest->cleanup) {
354 ctx->digest->cleanup(ctx);
355 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
357 OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
361 int EVP_DigestFinalXOF(EVP_MD_CTX *ctx, unsigned char *md, size_t size)
364 OSSL_PARAM params[2];
367 if (ctx->digest == NULL || ctx->digest->prov == NULL)
370 if (ctx->digest->dfinal == NULL) {
371 EVPerr(EVP_F_EVP_DIGESTFINALXOF, EVP_R_FINAL_ERROR);
375 params[i++] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &size);
376 params[i++] = OSSL_PARAM_construct_end();
378 if (EVP_MD_CTX_set_params(ctx, params) > 0)
379 ret = ctx->digest->dfinal(ctx->provctx, md, &size, size);
380 EVP_MD_CTX_reset(ctx);
384 if (ctx->digest->flags & EVP_MD_FLAG_XOF
386 && ctx->digest->md_ctrl(ctx, EVP_MD_CTRL_XOF_LEN, (int)size, NULL)) {
387 ret = ctx->digest->final(ctx, md);
388 if (ctx->digest->cleanup != NULL) {
389 ctx->digest->cleanup(ctx);
390 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
392 OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
394 EVPerr(EVP_F_EVP_DIGESTFINALXOF, EVP_R_NOT_XOF_OR_INVALID_LENGTH);
400 int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
402 EVP_MD_CTX_reset(out);
403 return EVP_MD_CTX_copy_ex(out, in);
406 int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
408 unsigned char *tmp_buf;
410 if (in == NULL || in->digest == NULL) {
411 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_INPUT_NOT_INITIALIZED);
415 if (in->digest->prov == NULL)
418 if (in->digest->dupctx == NULL) {
419 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_NOT_ABLE_TO_COPY_CTX);
423 EVP_MD_CTX_reset(out);
424 if (out->fetched_digest != NULL)
425 EVP_MD_free(out->fetched_digest);
427 /* NULL out pointers in case of error */
431 if (in->fetched_digest != NULL)
432 EVP_MD_up_ref(in->fetched_digest);
434 out->provctx = in->digest->dupctx(in->provctx);
435 if (out->provctx == NULL) {
436 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_NOT_ABLE_TO_COPY_CTX);
440 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
441 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
443 /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */
444 if (in->pctx != NULL) {
445 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
446 if (out->pctx == NULL) {
447 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_NOT_ABLE_TO_COPY_CTX);
448 EVP_MD_CTX_reset(out);
456 /* TODO(3.0): Remove legacy code below */
458 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
459 /* Make sure it's safe to copy a digest context using an ENGINE */
460 if (in->engine && !ENGINE_init(in->engine)) {
461 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_ENGINE_LIB);
466 if (out->digest == in->digest) {
467 tmp_buf = out->md_data;
468 EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE);
471 EVP_MD_CTX_reset(out);
472 memcpy(out, in, sizeof(*out));
474 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
475 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
477 /* Null these variables, since they are getting fixed up
478 * properly below. Anything else may cause a memleak and/or
479 * double free if any of the memory allocations below fail
484 if (in->md_data && out->digest->ctx_size) {
486 out->md_data = tmp_buf;
488 out->md_data = OPENSSL_malloc(out->digest->ctx_size);
489 if (out->md_data == NULL) {
490 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_MALLOC_FAILURE);
494 memcpy(out->md_data, in->md_data, out->digest->ctx_size);
497 out->update = in->update;
500 /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */
502 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
504 EVP_MD_CTX_reset(out);
510 if (out->digest->copy)
511 return out->digest->copy(out, in);
516 int EVP_Digest(const void *data, size_t count,
517 unsigned char *md, unsigned int *size, const EVP_MD *type,
520 EVP_MD_CTX *ctx = EVP_MD_CTX_new();
525 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_ONESHOT);
526 ret = EVP_DigestInit_ex(ctx, type, impl)
527 && EVP_DigestUpdate(ctx, data, count)
528 && EVP_DigestFinal_ex(ctx, md, size);
529 EVP_MD_CTX_free(ctx);
534 int EVP_MD_get_params(const EVP_MD *digest, OSSL_PARAM params[])
536 if (digest != NULL && digest->get_params != NULL)
537 return digest->get_params(params);
541 const OSSL_PARAM *EVP_MD_gettable_params(const EVP_MD *digest)
543 if (digest != NULL && digest->gettable_params != NULL)
544 return digest->gettable_params();
548 int EVP_MD_CTX_set_params(EVP_MD_CTX *ctx, const OSSL_PARAM params[])
550 EVP_PKEY_CTX *pctx = ctx->pctx;
552 if (ctx->digest != NULL && ctx->digest->set_ctx_params != NULL)
553 return ctx->digest->set_ctx_params(ctx->provctx, params);
556 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
557 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
558 && pctx->op.sig.sigprovctx != NULL
559 && pctx->op.sig.signature->set_ctx_md_params != NULL)
560 return pctx->op.sig.signature->set_ctx_md_params(pctx->op.sig.sigprovctx,
565 const OSSL_PARAM *EVP_MD_settable_ctx_params(const EVP_MD *md)
567 if (md != NULL && md->settable_ctx_params != NULL)
568 return md->settable_ctx_params();
572 const OSSL_PARAM *EVP_MD_CTX_settable_params(EVP_MD_CTX *ctx)
577 && ctx->digest != NULL
578 && ctx->digest->settable_ctx_params != NULL)
579 return ctx->digest->settable_ctx_params();
583 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
584 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
585 && pctx->op.sig.sigprovctx != NULL
586 && pctx->op.sig.signature->settable_ctx_md_params != NULL)
587 return pctx->op.sig.signature->settable_ctx_md_params(
588 pctx->op.sig.sigprovctx);
593 int EVP_MD_CTX_get_params(EVP_MD_CTX *ctx, OSSL_PARAM params[])
595 EVP_PKEY_CTX *pctx = ctx->pctx;
597 if (ctx->digest != NULL && ctx->digest->get_params != NULL)
598 return ctx->digest->get_ctx_params(ctx->provctx, params);
601 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
602 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
603 && pctx->op.sig.sigprovctx != NULL
604 && pctx->op.sig.signature->get_ctx_md_params != NULL)
605 return pctx->op.sig.signature->get_ctx_md_params(pctx->op.sig.sigprovctx,
611 const OSSL_PARAM *EVP_MD_gettable_ctx_params(const EVP_MD *md)
613 if (md != NULL && md->gettable_ctx_params != NULL)
614 return md->gettable_ctx_params();
618 const OSSL_PARAM *EVP_MD_CTX_gettable_params(EVP_MD_CTX *ctx)
623 && ctx->digest != NULL
624 && ctx->digest->gettable_ctx_params != NULL)
625 return ctx->digest->gettable_ctx_params();
629 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
630 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
631 && pctx->op.sig.sigprovctx != NULL
632 && pctx->op.sig.signature->gettable_ctx_md_params != NULL)
633 return pctx->op.sig.signature->gettable_ctx_md_params(
634 pctx->op.sig.sigprovctx);
639 /* TODO(3.0): Remove legacy code below - only used by engines & DigestSign */
640 int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2)
642 int ret = EVP_CTRL_RET_UNSUPPORTED;
645 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
647 if (ctx == NULL || ctx->digest == NULL) {
648 ERR_raise(ERR_LIB_EVP, EVP_R_MESSAGE_DIGEST_IS_NULL);
652 if (ctx->digest->prov == NULL
653 && (ctx->pctx == NULL
654 || (ctx->pctx->operation != EVP_PKEY_OP_VERIFYCTX
655 && ctx->pctx->operation != EVP_PKEY_OP_SIGNCTX)))
659 case EVP_MD_CTRL_XOF_LEN:
661 params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &sz);
663 case EVP_MD_CTRL_MICALG:
665 params[0] = OSSL_PARAM_construct_utf8_string(OSSL_DIGEST_PARAM_MICALG,
669 return EVP_CTRL_RET_UNSUPPORTED;
673 ret = EVP_MD_CTX_set_params(ctx, params);
675 ret = EVP_MD_CTX_get_params(ctx, params);
679 /* TODO(3.0): Remove legacy code below */
681 if (ctx->digest->md_ctrl == NULL) {
682 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
686 ret = ctx->digest->md_ctrl(ctx, cmd, p1, p2);
692 EVP_MD *evp_md_new(void)
694 EVP_MD *md = OPENSSL_zalloc(sizeof(*md));
697 md->lock = CRYPTO_THREAD_lock_new();
698 if (md->lock == NULL) {
708 * FIPS module note: since internal fetches will be entirely
709 * provider based, we know that none of its code depends on legacy
710 * NIDs or any functionality that use them.
713 /* TODO(3.x) get rid of the need for legacy NIDs */
714 static void set_legacy_nid(const char *name, void *vlegacy_nid)
717 int *legacy_nid = vlegacy_nid;
719 if (*legacy_nid == -1) /* We found a clash already */
721 if ((nid = OBJ_sn2nid(name)) == NID_undef
722 && (nid = OBJ_ln2nid(name)) == NID_undef)
724 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
732 static void *evp_md_from_dispatch(int name_id,
733 const OSSL_DISPATCH *fns,
734 OSSL_PROVIDER *prov, void *unused)
739 /* EVP_MD_fetch() will set the legacy NID if available */
740 if ((md = evp_md_new()) == NULL) {
741 EVPerr(0, ERR_R_MALLOC_FAILURE);
746 /* TODO(3.x) get rid of the need for legacy NIDs */
747 md->type = NID_undef;
748 evp_doall_names(prov, name_id, set_legacy_nid, &md->type);
749 if (md->type == -1) {
750 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
756 md->name_id = name_id;
758 for (; fns->function_id != 0; fns++) {
759 switch (fns->function_id) {
760 case OSSL_FUNC_DIGEST_NEWCTX:
761 if (md->newctx == NULL) {
762 md->newctx = OSSL_get_OP_digest_newctx(fns);
766 case OSSL_FUNC_DIGEST_INIT:
767 if (md->dinit == NULL) {
768 md->dinit = OSSL_get_OP_digest_init(fns);
772 case OSSL_FUNC_DIGEST_UPDATE:
773 if (md->dupdate == NULL) {
774 md->dupdate = OSSL_get_OP_digest_update(fns);
778 case OSSL_FUNC_DIGEST_FINAL:
779 if (md->dfinal == NULL) {
780 md->dfinal = OSSL_get_OP_digest_final(fns);
784 case OSSL_FUNC_DIGEST_DIGEST:
785 if (md->digest == NULL)
786 md->digest = OSSL_get_OP_digest_digest(fns);
787 /* We don't increment fnct for this as it is stand alone */
789 case OSSL_FUNC_DIGEST_FREECTX:
790 if (md->freectx == NULL) {
791 md->freectx = OSSL_get_OP_digest_freectx(fns);
795 case OSSL_FUNC_DIGEST_DUPCTX:
796 if (md->dupctx == NULL)
797 md->dupctx = OSSL_get_OP_digest_dupctx(fns);
799 case OSSL_FUNC_DIGEST_GET_PARAMS:
800 if (md->get_params == NULL)
801 md->get_params = OSSL_get_OP_digest_get_params(fns);
803 case OSSL_FUNC_DIGEST_SET_CTX_PARAMS:
804 if (md->set_ctx_params == NULL)
805 md->set_ctx_params = OSSL_get_OP_digest_set_ctx_params(fns);
807 case OSSL_FUNC_DIGEST_GET_CTX_PARAMS:
808 if (md->get_ctx_params == NULL)
809 md->get_ctx_params = OSSL_get_OP_digest_get_ctx_params(fns);
811 case OSSL_FUNC_DIGEST_GETTABLE_PARAMS:
812 if (md->gettable_params == NULL)
813 md->gettable_params = OSSL_get_OP_digest_gettable_params(fns);
815 case OSSL_FUNC_DIGEST_SETTABLE_CTX_PARAMS:
816 if (md->settable_ctx_params == NULL)
817 md->settable_ctx_params =
818 OSSL_get_OP_digest_settable_ctx_params(fns);
820 case OSSL_FUNC_DIGEST_GETTABLE_CTX_PARAMS:
821 if (md->gettable_ctx_params == NULL)
822 md->gettable_ctx_params =
823 OSSL_get_OP_digest_gettable_ctx_params(fns);
827 if ((fncnt != 0 && fncnt != 5)
828 || (fncnt == 0 && md->digest == NULL)) {
830 * In order to be a consistent set of functions we either need the
831 * whole set of init/update/final etc functions or none of them.
832 * The "digest" function can standalone. We at least need one way to
836 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
841 ossl_provider_up_ref(prov);
846 static int evp_md_up_ref(void *md)
848 return EVP_MD_up_ref(md);
851 static void evp_md_free(void *md)
856 EVP_MD *EVP_MD_fetch(OPENSSL_CTX *ctx, const char *algorithm,
857 const char *properties)
860 evp_generic_fetch(ctx, OSSL_OP_DIGEST, algorithm, properties,
861 evp_md_from_dispatch, NULL, evp_md_up_ref,
867 int EVP_MD_up_ref(EVP_MD *md)
871 CRYPTO_UP_REF(&md->refcnt, &ref, md->lock);
875 void EVP_MD_free(EVP_MD *md)
882 CRYPTO_DOWN_REF(&md->refcnt, &i, md->lock);
885 ossl_provider_free(md->prov);
886 CRYPTO_THREAD_lock_free(md->lock);
890 void EVP_MD_do_all_ex(OPENSSL_CTX *libctx,
891 void (*fn)(EVP_MD *mac, void *arg),
894 evp_generic_do_all(libctx, OSSL_OP_DIGEST,
895 (void (*)(void *, void *))fn, arg,
896 evp_md_from_dispatch, NULL, evp_md_free);