2 * Copyright 1995-2020 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
10 /* We need to use some engine deprecated APIs */
11 #define OPENSSL_SUPPRESS_DEPRECATED
14 #include <openssl/objects.h>
15 #include <openssl/evp.h>
16 #include <openssl/engine.h>
17 #include <openssl/params.h>
18 #include <openssl/core_names.h>
19 #include "internal/cryptlib.h"
20 #include "crypto/evp.h"
21 #include "internal/provider.h"
22 #include "evp_local.h"
24 /* This call frees resources associated with the context */
25 int EVP_MD_CTX_reset(EVP_MD_CTX *ctx)
31 /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */
33 * pctx should be freed by the user of EVP_MD_CTX
34 * if EVP_MD_CTX_FLAG_KEEP_PKEY_CTX is set
36 if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX))
37 EVP_PKEY_CTX_free(ctx->pctx);
40 EVP_MD_free(ctx->fetched_digest);
41 ctx->fetched_digest = NULL;
42 ctx->reqdigest = NULL;
44 if (ctx->provctx != NULL) {
45 if (ctx->digest->freectx != NULL)
46 ctx->digest->freectx(ctx->provctx);
48 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
51 /* TODO(3.0): Remove legacy code below */
54 * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because
55 * sometimes only copies of the context are ever finalised.
57 if (ctx->digest && ctx->digest->cleanup
58 && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED))
59 ctx->digest->cleanup(ctx);
60 if (ctx->digest && ctx->digest->ctx_size && ctx->md_data
61 && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) {
62 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
65 #if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
66 ENGINE_finish(ctx->engine);
69 /* TODO(3.0): End of legacy code */
71 OPENSSL_cleanse(ctx, sizeof(*ctx));
76 EVP_MD_CTX *EVP_MD_CTX_new(void)
78 return OPENSSL_zalloc(sizeof(EVP_MD_CTX));
81 void EVP_MD_CTX_free(EVP_MD_CTX *ctx)
86 EVP_MD_CTX_reset(ctx);
92 int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
94 EVP_MD_CTX_reset(ctx);
95 return EVP_DigestInit_ex(ctx, type, NULL);
98 int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
100 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
101 ENGINE *tmpimpl = NULL;
104 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
106 if (ctx->provctx != NULL) {
107 if (!ossl_assert(ctx->digest != NULL)) {
108 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
111 if (ctx->digest->freectx != NULL)
112 ctx->digest->freectx(ctx->provctx);
117 ctx->reqdigest = type;
119 /* TODO(3.0): Legacy work around code below. Remove this */
120 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
122 * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
123 * this context may already have an ENGINE! Try to avoid releasing the
124 * previous handle, re-querying for an ENGINE, and having a
125 * reinitialisation, when it may all be unnecessary.
127 if (ctx->engine && ctx->digest &&
128 (type == NULL || (type->type == ctx->digest->type)))
133 * Ensure an ENGINE left lying around from last time is cleared (the
134 * previous check attempted to avoid this if the same ENGINE and
135 * EVP_MD could be used).
137 ENGINE_finish(ctx->engine);
141 if (type != NULL && impl == NULL)
142 tmpimpl = ENGINE_get_digest_engine(type->type);
146 * If there are engines involved or EVP_MD_CTX_FLAG_NO_INIT is set then we
147 * should use legacy handling for now.
149 if (ctx->engine != NULL
151 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
154 || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0) {
155 if (ctx->digest == ctx->fetched_digest)
157 EVP_MD_free(ctx->fetched_digest);
158 ctx->fetched_digest = NULL;
162 if (ctx->digest != NULL && ctx->digest->ctx_size > 0) {
163 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
167 /* TODO(3.0): Start of non-legacy code below */
169 if (type->prov == NULL) {
171 /* We only do explicit fetches inside the FIPS module */
172 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
175 EVP_MD *provmd = EVP_MD_fetch(NULL, OBJ_nid2sn(type->type), "");
177 if (provmd == NULL) {
178 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
182 EVP_MD_free(ctx->fetched_digest);
183 ctx->fetched_digest = provmd;
187 if (ctx->provctx != NULL && ctx->digest != NULL && ctx->digest != type) {
188 if (ctx->digest->freectx != NULL)
189 ctx->digest->freectx(ctx->provctx);
193 if (ctx->provctx == NULL) {
194 ctx->provctx = ctx->digest->newctx(ossl_provider_ctx(type->prov));
195 if (ctx->provctx == NULL) {
196 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
201 if (ctx->digest->dinit == NULL) {
202 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
206 return ctx->digest->dinit(ctx->provctx);
208 /* TODO(3.0): Remove legacy code below */
211 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
214 if (!ENGINE_init(impl)) {
215 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
219 /* Ask if an ENGINE is reserved for this job */
223 /* There's an ENGINE for this job ... (apparently) */
224 const EVP_MD *d = ENGINE_get_digest(impl, type->type);
227 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
231 /* We'll use the ENGINE's private digest definition */
234 * Store the ENGINE functional reference so we know 'type' came
235 * from an ENGINE and we need to release it when done.
242 EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_NO_DIGEST_SET);
248 if (ctx->digest != type) {
249 if (ctx->digest && ctx->digest->ctx_size) {
250 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
254 if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) {
255 ctx->update = type->update;
256 ctx->md_data = OPENSSL_zalloc(type->ctx_size);
257 if (ctx->md_data == NULL) {
258 EVPerr(EVP_F_EVP_DIGESTINIT_EX, ERR_R_MALLOC_FAILURE);
263 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
268 * TODO(3.0): Temporarily no support for EVP_DigestSign* inside FIPS module
269 * or when using providers.
271 if (ctx->pctx != NULL
272 && (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx)
273 || ctx->pctx->op.sig.signature == NULL)) {
275 r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG,
276 EVP_PKEY_CTRL_DIGESTINIT, 0, ctx);
277 if (r <= 0 && (r != -2))
281 if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
283 return ctx->digest->init(ctx);
286 int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
291 if (ctx->pctx != NULL
292 && EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx)
293 && ctx->pctx->op.sig.sigprovctx != NULL) {
295 * Prior to OpenSSL 3.0 EVP_DigestSignUpdate() and
296 * EVP_DigestVerifyUpdate() were just macros for EVP_DigestUpdate().
297 * Some code calls EVP_DigestUpdate() directly even when initialised
298 * with EVP_DigestSignInit_with_libctx() or
299 * EVP_DigestVerifyInit_with_libctx(), so we detect that and redirect to
300 * the correct EVP_Digest*Update() function
302 if (ctx->pctx->operation == EVP_PKEY_OP_SIGNCTX)
303 return EVP_DigestSignUpdate(ctx, data, count);
304 if (ctx->pctx->operation == EVP_PKEY_OP_VERIFYCTX)
305 return EVP_DigestVerifyUpdate(ctx, data, count);
306 EVPerr(EVP_F_EVP_DIGESTUPDATE, EVP_R_UPDATE_ERROR);
310 if (ctx->digest == NULL
311 || ctx->digest->prov == NULL
312 || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0)
315 if (ctx->digest->dupdate == NULL) {
316 EVPerr(EVP_F_EVP_DIGESTUPDATE, EVP_R_UPDATE_ERROR);
319 return ctx->digest->dupdate(ctx->provctx, data, count);
321 /* TODO(3.0): Remove legacy code below */
323 return ctx->update(ctx, data, count);
326 /* The caller can assume that this removes any secret data from the context */
327 int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
330 ret = EVP_DigestFinal_ex(ctx, md, size);
331 EVP_MD_CTX_reset(ctx);
335 /* The caller can assume that this removes any secret data from the context */
336 int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *isize)
340 size_t mdsize = EVP_MD_size(ctx->digest);
342 if (ctx->digest == NULL || ctx->digest->prov == NULL)
345 if (ctx->digest->dfinal == NULL) {
346 EVPerr(EVP_F_EVP_DIGESTFINAL_EX, EVP_R_FINAL_ERROR);
350 ret = ctx->digest->dfinal(ctx->provctx, md, &size, mdsize);
353 if (size <= UINT_MAX) {
356 EVPerr(EVP_F_EVP_DIGESTFINAL_EX, EVP_R_FINAL_ERROR);
363 /* TODO(3.0): Remove legacy code below */
365 OPENSSL_assert(mdsize <= EVP_MAX_MD_SIZE);
366 ret = ctx->digest->final(ctx, md);
369 if (ctx->digest->cleanup) {
370 ctx->digest->cleanup(ctx);
371 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
373 OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
377 int EVP_DigestFinalXOF(EVP_MD_CTX *ctx, unsigned char *md, size_t size)
380 OSSL_PARAM params[2];
383 if (ctx->digest == NULL || ctx->digest->prov == NULL)
386 if (ctx->digest->dfinal == NULL) {
387 EVPerr(EVP_F_EVP_DIGESTFINALXOF, EVP_R_FINAL_ERROR);
391 params[i++] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &size);
392 params[i++] = OSSL_PARAM_construct_end();
394 if (EVP_MD_CTX_set_params(ctx, params) > 0)
395 ret = ctx->digest->dfinal(ctx->provctx, md, &size, size);
396 EVP_MD_CTX_reset(ctx);
400 if (ctx->digest->flags & EVP_MD_FLAG_XOF
402 && ctx->digest->md_ctrl(ctx, EVP_MD_CTRL_XOF_LEN, (int)size, NULL)) {
403 ret = ctx->digest->final(ctx, md);
404 if (ctx->digest->cleanup != NULL) {
405 ctx->digest->cleanup(ctx);
406 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
408 OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
410 EVPerr(EVP_F_EVP_DIGESTFINALXOF, EVP_R_NOT_XOF_OR_INVALID_LENGTH);
416 int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
418 EVP_MD_CTX_reset(out);
419 return EVP_MD_CTX_copy_ex(out, in);
422 int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
424 unsigned char *tmp_buf;
426 if (in == NULL || in->digest == NULL) {
427 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_INPUT_NOT_INITIALIZED);
431 if (in->digest->prov == NULL
432 || (in->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0)
435 if (in->digest->dupctx == NULL) {
436 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_NOT_ABLE_TO_COPY_CTX);
440 EVP_MD_CTX_reset(out);
441 if (out->fetched_digest != NULL)
442 EVP_MD_free(out->fetched_digest);
444 /* NULL out pointers in case of error */
448 if (in->fetched_digest != NULL)
449 EVP_MD_up_ref(in->fetched_digest);
451 out->provctx = in->digest->dupctx(in->provctx);
452 if (out->provctx == NULL) {
453 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_NOT_ABLE_TO_COPY_CTX);
457 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
458 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
460 /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */
461 if (in->pctx != NULL) {
462 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
463 if (out->pctx == NULL) {
464 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_NOT_ABLE_TO_COPY_CTX);
465 EVP_MD_CTX_reset(out);
473 /* TODO(3.0): Remove legacy code below */
475 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
476 /* Make sure it's safe to copy a digest context using an ENGINE */
477 if (in->engine && !ENGINE_init(in->engine)) {
478 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_ENGINE_LIB);
483 if (out->digest == in->digest) {
484 tmp_buf = out->md_data;
485 EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE);
488 EVP_MD_CTX_reset(out);
489 memcpy(out, in, sizeof(*out));
491 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
492 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
494 /* Null these variables, since they are getting fixed up
495 * properly below. Anything else may cause a memleak and/or
496 * double free if any of the memory allocations below fail
501 if (in->md_data && out->digest->ctx_size) {
503 out->md_data = tmp_buf;
505 out->md_data = OPENSSL_malloc(out->digest->ctx_size);
506 if (out->md_data == NULL) {
507 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_MALLOC_FAILURE);
511 memcpy(out->md_data, in->md_data, out->digest->ctx_size);
514 out->update = in->update;
517 /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */
519 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
521 EVP_MD_CTX_reset(out);
527 if (out->digest->copy)
528 return out->digest->copy(out, in);
533 int EVP_Digest(const void *data, size_t count,
534 unsigned char *md, unsigned int *size, const EVP_MD *type,
537 EVP_MD_CTX *ctx = EVP_MD_CTX_new();
542 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_ONESHOT);
543 ret = EVP_DigestInit_ex(ctx, type, impl)
544 && EVP_DigestUpdate(ctx, data, count)
545 && EVP_DigestFinal_ex(ctx, md, size);
546 EVP_MD_CTX_free(ctx);
551 int EVP_MD_get_params(const EVP_MD *digest, OSSL_PARAM params[])
553 if (digest != NULL && digest->get_params != NULL)
554 return digest->get_params(params);
558 const OSSL_PARAM *EVP_MD_gettable_params(const EVP_MD *digest)
560 if (digest != NULL && digest->gettable_params != NULL)
561 return digest->gettable_params(
562 ossl_provider_ctx(EVP_MD_provider(digest)));
566 int EVP_MD_CTX_set_params(EVP_MD_CTX *ctx, const OSSL_PARAM params[])
568 EVP_PKEY_CTX *pctx = ctx->pctx;
570 if (ctx->digest != NULL && ctx->digest->set_ctx_params != NULL)
571 return ctx->digest->set_ctx_params(ctx->provctx, params);
574 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
575 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
576 && pctx->op.sig.sigprovctx != NULL
577 && pctx->op.sig.signature->set_ctx_md_params != NULL)
578 return pctx->op.sig.signature->set_ctx_md_params(pctx->op.sig.sigprovctx,
583 const OSSL_PARAM *EVP_MD_settable_ctx_params(const EVP_MD *md)
585 if (md != NULL && md->settable_ctx_params != NULL)
586 return md->settable_ctx_params(ossl_provider_ctx(EVP_MD_provider(md)));
590 const OSSL_PARAM *EVP_MD_CTX_settable_params(EVP_MD_CTX *ctx)
597 if (ctx->digest != NULL && ctx->digest->settable_ctx_params != NULL)
598 return ctx->digest->settable_ctx_params(
599 ossl_provider_ctx(EVP_MD_provider(ctx->digest)));
603 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
604 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
605 && pctx->op.sig.sigprovctx != NULL
606 && pctx->op.sig.signature->settable_ctx_md_params != NULL)
607 return pctx->op.sig.signature->settable_ctx_md_params(
608 pctx->op.sig.sigprovctx);
613 int EVP_MD_CTX_get_params(EVP_MD_CTX *ctx, OSSL_PARAM params[])
615 EVP_PKEY_CTX *pctx = ctx->pctx;
617 if (ctx->digest != NULL && ctx->digest->get_params != NULL)
618 return ctx->digest->get_ctx_params(ctx->provctx, params);
621 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
622 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
623 && pctx->op.sig.sigprovctx != NULL
624 && pctx->op.sig.signature->get_ctx_md_params != NULL)
625 return pctx->op.sig.signature->get_ctx_md_params(pctx->op.sig.sigprovctx,
631 const OSSL_PARAM *EVP_MD_gettable_ctx_params(const EVP_MD *md)
633 if (md != NULL && md->gettable_ctx_params != NULL)
634 return md->gettable_ctx_params(ossl_provider_ctx(EVP_MD_provider(md)));
638 const OSSL_PARAM *EVP_MD_CTX_gettable_params(EVP_MD_CTX *ctx)
643 && ctx->digest != NULL
644 && ctx->digest->gettable_ctx_params != NULL)
645 return ctx->digest->gettable_ctx_params(
646 ossl_provider_ctx(EVP_MD_provider(ctx->digest)));
650 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
651 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
652 && pctx->op.sig.sigprovctx != NULL
653 && pctx->op.sig.signature->gettable_ctx_md_params != NULL)
654 return pctx->op.sig.signature->gettable_ctx_md_params(
655 pctx->op.sig.sigprovctx);
660 /* TODO(3.0): Remove legacy code below - only used by engines & DigestSign */
661 int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2)
663 int ret = EVP_CTRL_RET_UNSUPPORTED;
666 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
669 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
673 if (ctx->digest != NULL && ctx->digest->prov == NULL)
677 case EVP_MD_CTRL_XOF_LEN:
679 params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &sz);
681 case EVP_MD_CTRL_MICALG:
683 params[0] = OSSL_PARAM_construct_utf8_string(OSSL_DIGEST_PARAM_MICALG,
686 case EVP_CTRL_SSL3_MASTER_SECRET:
687 params[0] = OSSL_PARAM_construct_octet_string(OSSL_DIGEST_PARAM_SSL3_MS,
695 ret = EVP_MD_CTX_set_params(ctx, params);
697 ret = EVP_MD_CTX_get_params(ctx, params);
701 /* TODO(3.0): Remove legacy code below */
703 if (ctx->digest->md_ctrl == NULL) {
704 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
708 ret = ctx->digest->md_ctrl(ctx, cmd, p1, p2);
715 EVP_MD *evp_md_new(void)
717 EVP_MD *md = OPENSSL_zalloc(sizeof(*md));
720 md->lock = CRYPTO_THREAD_lock_new();
721 if (md->lock == NULL) {
731 * FIPS module note: since internal fetches will be entirely
732 * provider based, we know that none of its code depends on legacy
733 * NIDs or any functionality that use them.
736 /* TODO(3.x) get rid of the need for legacy NIDs */
737 static void set_legacy_nid(const char *name, void *vlegacy_nid)
740 int *legacy_nid = vlegacy_nid;
742 * We use lowest level function to get the associated method, because
743 * higher level functions such as EVP_get_digestbyname() have changed
744 * to look at providers too.
746 const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_MD_METH);
748 if (*legacy_nid == -1) /* We found a clash already */
751 if (legacy_method == NULL)
753 nid = EVP_MD_nid(legacy_method);
754 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
762 static void *evp_md_from_dispatch(int name_id,
763 const OSSL_DISPATCH *fns,
769 /* EVP_MD_fetch() will set the legacy NID if available */
770 if ((md = evp_md_new()) == NULL) {
771 EVPerr(0, ERR_R_MALLOC_FAILURE);
776 /* TODO(3.x) get rid of the need for legacy NIDs */
777 md->type = NID_undef;
778 evp_names_do_all(prov, name_id, set_legacy_nid, &md->type);
779 if (md->type == -1) {
780 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
786 md->name_id = name_id;
788 for (; fns->function_id != 0; fns++) {
789 switch (fns->function_id) {
790 case OSSL_FUNC_DIGEST_NEWCTX:
791 if (md->newctx == NULL) {
792 md->newctx = OSSL_FUNC_digest_newctx(fns);
796 case OSSL_FUNC_DIGEST_INIT:
797 if (md->dinit == NULL) {
798 md->dinit = OSSL_FUNC_digest_init(fns);
802 case OSSL_FUNC_DIGEST_UPDATE:
803 if (md->dupdate == NULL) {
804 md->dupdate = OSSL_FUNC_digest_update(fns);
808 case OSSL_FUNC_DIGEST_FINAL:
809 if (md->dfinal == NULL) {
810 md->dfinal = OSSL_FUNC_digest_final(fns);
814 case OSSL_FUNC_DIGEST_DIGEST:
815 if (md->digest == NULL)
816 md->digest = OSSL_FUNC_digest_digest(fns);
817 /* We don't increment fnct for this as it is stand alone */
819 case OSSL_FUNC_DIGEST_FREECTX:
820 if (md->freectx == NULL) {
821 md->freectx = OSSL_FUNC_digest_freectx(fns);
825 case OSSL_FUNC_DIGEST_DUPCTX:
826 if (md->dupctx == NULL)
827 md->dupctx = OSSL_FUNC_digest_dupctx(fns);
829 case OSSL_FUNC_DIGEST_GET_PARAMS:
830 if (md->get_params == NULL)
831 md->get_params = OSSL_FUNC_digest_get_params(fns);
833 case OSSL_FUNC_DIGEST_SET_CTX_PARAMS:
834 if (md->set_ctx_params == NULL)
835 md->set_ctx_params = OSSL_FUNC_digest_set_ctx_params(fns);
837 case OSSL_FUNC_DIGEST_GET_CTX_PARAMS:
838 if (md->get_ctx_params == NULL)
839 md->get_ctx_params = OSSL_FUNC_digest_get_ctx_params(fns);
841 case OSSL_FUNC_DIGEST_GETTABLE_PARAMS:
842 if (md->gettable_params == NULL)
843 md->gettable_params = OSSL_FUNC_digest_gettable_params(fns);
845 case OSSL_FUNC_DIGEST_SETTABLE_CTX_PARAMS:
846 if (md->settable_ctx_params == NULL)
847 md->settable_ctx_params =
848 OSSL_FUNC_digest_settable_ctx_params(fns);
850 case OSSL_FUNC_DIGEST_GETTABLE_CTX_PARAMS:
851 if (md->gettable_ctx_params == NULL)
852 md->gettable_ctx_params =
853 OSSL_FUNC_digest_gettable_ctx_params(fns);
857 if ((fncnt != 0 && fncnt != 5)
858 || (fncnt == 0 && md->digest == NULL)) {
860 * In order to be a consistent set of functions we either need the
861 * whole set of init/update/final etc functions or none of them.
862 * The "digest" function can standalone. We at least need one way to
866 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
871 ossl_provider_up_ref(prov);
876 static int evp_md_up_ref(void *md)
878 return EVP_MD_up_ref(md);
881 static void evp_md_free(void *md)
886 EVP_MD *EVP_MD_fetch(OPENSSL_CTX *ctx, const char *algorithm,
887 const char *properties)
890 evp_generic_fetch(ctx, OSSL_OP_DIGEST, algorithm, properties,
891 evp_md_from_dispatch, evp_md_up_ref, evp_md_free);
896 int EVP_MD_up_ref(EVP_MD *md)
900 CRYPTO_UP_REF(&md->refcnt, &ref, md->lock);
904 void EVP_MD_free(EVP_MD *md)
911 CRYPTO_DOWN_REF(&md->refcnt, &i, md->lock);
914 ossl_provider_free(md->prov);
915 CRYPTO_THREAD_lock_free(md->lock);
919 void EVP_MD_do_all_provided(OPENSSL_CTX *libctx,
920 void (*fn)(EVP_MD *mac, void *arg),
923 evp_generic_do_all(libctx, OSSL_OP_DIGEST,
924 (void (*)(void *, void *))fn, arg,
925 evp_md_from_dispatch, evp_md_free);