2 * Copyright 1995-2022 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/ec.h>
18 # include <openssl/engine.h>
20 #include <openssl/params.h>
21 #include <openssl/core_names.h>
22 #include "internal/cryptlib.h"
23 #include "internal/provider.h"
24 #include "internal/core.h"
25 #include "crypto/evp.h"
26 #include "evp_local.h"
28 static void cleanup_old_md_data(EVP_MD_CTX *ctx, int force)
30 if (ctx->digest != NULL) {
31 if (ctx->digest->cleanup != NULL
32 && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED))
33 ctx->digest->cleanup(ctx);
34 if (ctx->md_data != NULL && ctx->digest->ctx_size > 0
35 && (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)
37 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
43 void evp_md_ctx_clear_digest(EVP_MD_CTX *ctx, int force, int keep_fetched)
45 if (ctx->algctx != NULL) {
46 if (ctx->digest != NULL && ctx->digest->freectx != NULL)
47 ctx->digest->freectx(ctx->algctx);
49 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
52 /* Code below to be removed when legacy support is dropped. */
55 * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because
56 * sometimes only copies of the context are ever finalised.
58 cleanup_old_md_data(ctx, force);
62 #if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
63 ENGINE_finish(ctx->engine);
67 /* Non legacy code, this has to be later than the ctx->digest cleaning */
69 EVP_MD_free(ctx->fetched_digest);
70 ctx->fetched_digest = NULL;
71 ctx->reqdigest = NULL;
75 static int evp_md_ctx_reset_ex(EVP_MD_CTX *ctx, int keep_fetched)
82 * pctx should be freed by the user of EVP_MD_CTX
83 * if EVP_MD_CTX_FLAG_KEEP_PKEY_CTX is set
85 if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX)) {
86 EVP_PKEY_CTX_free(ctx->pctx);
91 evp_md_ctx_clear_digest(ctx, 0, keep_fetched);
93 OPENSSL_cleanse(ctx, sizeof(*ctx));
98 /* This call frees resources associated with the context */
99 int EVP_MD_CTX_reset(EVP_MD_CTX *ctx)
101 return evp_md_ctx_reset_ex(ctx, 0);
105 EVP_MD_CTX *evp_md_ctx_new_ex(EVP_PKEY *pkey, const ASN1_OCTET_STRING *id,
106 OSSL_LIB_CTX *libctx, const char *propq)
109 EVP_PKEY_CTX *pctx = NULL;
111 if ((ctx = EVP_MD_CTX_new()) == NULL
112 || (pctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq)) == NULL) {
113 ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
117 if (id != NULL && EVP_PKEY_CTX_set1_id(pctx, id->data, id->length) <= 0)
120 EVP_MD_CTX_set_pkey_ctx(ctx, pctx);
124 EVP_PKEY_CTX_free(pctx);
125 EVP_MD_CTX_free(ctx);
130 EVP_MD_CTX *EVP_MD_CTX_new(void)
132 return OPENSSL_zalloc(sizeof(EVP_MD_CTX));
135 void EVP_MD_CTX_free(EVP_MD_CTX *ctx)
140 EVP_MD_CTX_reset(ctx);
144 int evp_md_ctx_free_algctx(EVP_MD_CTX *ctx)
146 if (ctx->algctx != NULL) {
147 if (!ossl_assert(ctx->digest != NULL)) {
148 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
151 if (ctx->digest->freectx != NULL)
152 ctx->digest->freectx(ctx->algctx);
158 static int evp_md_init_internal(EVP_MD_CTX *ctx, const EVP_MD *type,
159 const OSSL_PARAM params[], ENGINE *impl)
161 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
162 ENGINE *tmpimpl = NULL;
165 #if !defined(FIPS_MODULE)
166 if (ctx->pctx != NULL
167 && EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx)
168 && ctx->pctx->op.sig.algctx != NULL) {
170 * Prior to OpenSSL 3.0 calling EVP_DigestInit_ex() on an mdctx
171 * previously initialised with EVP_DigestSignInit() would retain
172 * information about the key, and re-initialise for another sign
173 * operation. So in that case we redirect to EVP_DigestSignInit()
175 if (ctx->pctx->operation == EVP_PKEY_OP_SIGNCTX)
176 return EVP_DigestSignInit(ctx, NULL, type, impl, NULL);
177 if (ctx->pctx->operation == EVP_PKEY_OP_VERIFYCTX)
178 return EVP_DigestVerifyInit(ctx, NULL, type, impl, NULL);
179 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
184 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
187 ctx->reqdigest = type;
189 if (ctx->digest == NULL) {
190 ERR_raise(ERR_LIB_EVP, EVP_R_NO_DIGEST_SET);
196 /* Code below to be removed when legacy support is dropped. */
197 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
199 * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
200 * this context may already have an ENGINE! Try to avoid releasing the
201 * previous handle, re-querying for an ENGINE, and having a
202 * reinitialisation, when it may all be unnecessary.
204 if (ctx->engine != NULL
205 && ctx->digest != NULL
206 && type->type == ctx->digest->type)
210 * Ensure an ENGINE left lying around from last time is cleared (the
211 * previous check attempted to avoid this if the same ENGINE and
212 * EVP_MD could be used).
214 ENGINE_finish(ctx->engine);
218 tmpimpl = ENGINE_get_digest_engine(type->type);
222 * If there are engines involved or EVP_MD_CTX_FLAG_NO_INIT is set then we
223 * should use legacy handling for now.
226 #if !defined(OPENSSL_NO_ENGINE)
227 || ctx->engine != NULL
228 # if !defined(FIPS_MODULE)
232 || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0
233 || type->origin == EVP_ORIG_METH) {
234 /* If we were using provided hash before, cleanup algctx */
235 if (!evp_md_ctx_free_algctx(ctx))
238 if (ctx->digest == ctx->fetched_digest)
240 EVP_MD_free(ctx->fetched_digest);
241 ctx->fetched_digest = NULL;
245 cleanup_old_md_data(ctx, 1);
247 /* Start of non-legacy code below */
248 if (ctx->digest != type && !evp_md_ctx_free_algctx(ctx))
251 if (type->prov == NULL) {
253 /* We only do explicit fetches inside the FIPS module */
254 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
257 /* The NULL digest is a special case */
258 EVP_MD *provmd = EVP_MD_fetch(NULL,
259 type->type != NID_undef ? OBJ_nid2sn(type->type)
262 if (provmd == NULL) {
263 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
267 EVP_MD_free(ctx->fetched_digest);
268 ctx->fetched_digest = provmd;
272 if (type->prov != NULL && ctx->fetched_digest != type) {
273 if (!EVP_MD_up_ref((EVP_MD *)type)) {
274 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
277 EVP_MD_free(ctx->fetched_digest);
278 ctx->fetched_digest = (EVP_MD *)type;
281 if (ctx->algctx == NULL) {
282 ctx->algctx = ctx->digest->newctx(ossl_provider_ctx(type->prov));
283 if (ctx->algctx == NULL) {
284 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
289 if (ctx->digest->dinit == NULL) {
290 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
294 return ctx->digest->dinit(ctx->algctx, params);
296 /* Code below to be removed when legacy support is dropped. */
299 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
302 if (!ENGINE_init(impl)) {
303 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
307 /* Ask if an ENGINE is reserved for this job */
311 /* There's an ENGINE for this job ... (apparently) */
312 const EVP_MD *d = ENGINE_get_digest(impl, type->type);
315 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
319 /* We'll use the ENGINE's private digest definition */
322 * Store the ENGINE functional reference so we know 'type' came
323 * from an ENGINE and we need to release it when done.
330 if (ctx->digest != type) {
331 cleanup_old_md_data(ctx, 1);
334 if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) {
335 ctx->update = type->update;
336 ctx->md_data = OPENSSL_zalloc(type->ctx_size);
337 if (ctx->md_data == NULL) {
338 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
343 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
347 if (ctx->pctx != NULL
348 && (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx)
349 || ctx->pctx->op.sig.signature == NULL)) {
351 r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG,
352 EVP_PKEY_CTRL_DIGESTINIT, 0, ctx);
353 if (r <= 0 && (r != -2))
357 if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
359 return ctx->digest->init(ctx);
362 int EVP_DigestInit_ex2(EVP_MD_CTX *ctx, const EVP_MD *type,
363 const OSSL_PARAM params[])
365 return evp_md_init_internal(ctx, type, params, NULL);
368 int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
370 EVP_MD_CTX_reset(ctx);
371 return evp_md_init_internal(ctx, type, NULL, NULL);
374 int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
376 return evp_md_init_internal(ctx, type, NULL, impl);
379 int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
384 if (ctx->pctx != NULL
385 && EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx)
386 && ctx->pctx->op.sig.algctx != NULL) {
388 * Prior to OpenSSL 3.0 EVP_DigestSignUpdate() and
389 * EVP_DigestVerifyUpdate() were just macros for EVP_DigestUpdate().
390 * Some code calls EVP_DigestUpdate() directly even when initialised
391 * with EVP_DigestSignInit_ex() or
392 * EVP_DigestVerifyInit_ex(), so we detect that and redirect to
393 * the correct EVP_Digest*Update() function
395 if (ctx->pctx->operation == EVP_PKEY_OP_SIGNCTX)
396 return EVP_DigestSignUpdate(ctx, data, count);
397 if (ctx->pctx->operation == EVP_PKEY_OP_VERIFYCTX)
398 return EVP_DigestVerifyUpdate(ctx, data, count);
399 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
403 if (ctx->digest == NULL
404 || ctx->digest->prov == NULL
405 || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0)
408 if (ctx->digest->dupdate == NULL) {
409 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
412 return ctx->digest->dupdate(ctx->algctx, data, count);
414 /* Code below to be removed when legacy support is dropped. */
416 return ctx->update(ctx, data, count);
419 /* The caller can assume that this removes any secret data from the context */
420 int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
423 ret = EVP_DigestFinal_ex(ctx, md, size);
424 EVP_MD_CTX_reset(ctx);
428 /* The caller can assume that this removes any secret data from the context */
429 int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *isize)
435 if (ctx->digest == NULL)
438 sz = EVP_MD_get_size(ctx->digest);
442 if (ctx->digest->prov == NULL)
445 if (ctx->digest->dfinal == NULL) {
446 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
450 ret = ctx->digest->dfinal(ctx->algctx, md, &size, mdsize);
453 if (size <= UINT_MAX) {
456 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
463 /* Code below to be removed when legacy support is dropped. */
465 OPENSSL_assert(mdsize <= EVP_MAX_MD_SIZE);
466 ret = ctx->digest->final(ctx, md);
469 if (ctx->digest->cleanup) {
470 ctx->digest->cleanup(ctx);
471 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
473 OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
477 int EVP_DigestFinalXOF(EVP_MD_CTX *ctx, unsigned char *md, size_t size)
480 OSSL_PARAM params[2];
483 if (ctx->digest == NULL) {
484 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_NULL_ALGORITHM);
488 if (ctx->digest->prov == NULL)
491 if (ctx->digest->dfinal == NULL) {
492 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
496 params[i++] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &size);
497 params[i++] = OSSL_PARAM_construct_end();
499 if (EVP_MD_CTX_set_params(ctx, params) > 0)
500 ret = ctx->digest->dfinal(ctx->algctx, md, &size, size);
505 if (ctx->digest->flags & EVP_MD_FLAG_XOF
507 && ctx->digest->md_ctrl(ctx, EVP_MD_CTRL_XOF_LEN, (int)size, NULL)) {
508 ret = ctx->digest->final(ctx, md);
509 if (ctx->digest->cleanup != NULL) {
510 ctx->digest->cleanup(ctx);
511 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
513 OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
515 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_XOF_OR_INVALID_LENGTH);
521 EVP_MD_CTX *EVP_MD_CTX_dup(const EVP_MD_CTX *in)
523 EVP_MD_CTX *out = EVP_MD_CTX_new();
525 if (out != NULL && !EVP_MD_CTX_copy_ex(out, in)) {
526 EVP_MD_CTX_free(out);
532 int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
534 EVP_MD_CTX_reset(out);
535 return EVP_MD_CTX_copy_ex(out, in);
538 int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
540 int digest_change = 0;
541 unsigned char *tmp_buf;
544 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
548 if (in->digest == NULL) {
549 /* copying uninitialized digest context */
550 EVP_MD_CTX_reset(out);
551 if (out->fetched_digest != NULL)
552 EVP_MD_free(out->fetched_digest);
557 if (in->digest->prov == NULL
558 || (in->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0)
561 if (in->digest->dupctx == NULL) {
562 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
566 evp_md_ctx_reset_ex(out, 1);
567 digest_change = (out->fetched_digest != in->fetched_digest);
568 if (digest_change && out->fetched_digest != NULL)
569 EVP_MD_free(out->fetched_digest);
571 /* NULL out pointers in case of error */
575 if (digest_change && in->fetched_digest != NULL)
576 EVP_MD_up_ref(in->fetched_digest);
578 if (in->algctx != NULL) {
579 out->algctx = in->digest->dupctx(in->algctx);
580 if (out->algctx == NULL) {
581 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
587 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
588 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
590 if (in->pctx != NULL) {
591 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
592 if (out->pctx == NULL) {
593 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
594 EVP_MD_CTX_reset(out);
602 /* Code below to be removed when legacy support is dropped. */
604 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
605 /* Make sure it's safe to copy a digest context using an ENGINE */
606 if (in->engine && !ENGINE_init(in->engine)) {
607 ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB);
612 if (out->digest == in->digest) {
613 tmp_buf = out->md_data;
614 EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE);
617 EVP_MD_CTX_reset(out);
618 memcpy(out, in, sizeof(*out));
620 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
621 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
623 /* Null these variables, since they are getting fixed up
624 * properly below. Anything else may cause a memleak and/or
625 * double free if any of the memory allocations below fail
630 if (in->md_data && out->digest->ctx_size) {
632 out->md_data = tmp_buf;
634 out->md_data = OPENSSL_malloc(out->digest->ctx_size);
635 if (out->md_data == NULL) {
636 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
640 memcpy(out->md_data, in->md_data, out->digest->ctx_size);
643 out->update = in->update;
647 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
649 EVP_MD_CTX_reset(out);
655 if (out->digest->copy)
656 return out->digest->copy(out, in);
661 int EVP_Digest(const void *data, size_t count,
662 unsigned char *md, unsigned int *size, const EVP_MD *type,
665 EVP_MD_CTX *ctx = EVP_MD_CTX_new();
670 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_ONESHOT);
671 ret = EVP_DigestInit_ex(ctx, type, impl)
672 && EVP_DigestUpdate(ctx, data, count)
673 && EVP_DigestFinal_ex(ctx, md, size);
674 EVP_MD_CTX_free(ctx);
679 int EVP_Q_digest(OSSL_LIB_CTX *libctx, const char *name, const char *propq,
680 const void *data, size_t datalen,
681 unsigned char *md, size_t *mdlen)
683 EVP_MD *digest = EVP_MD_fetch(libctx, name, propq);
684 unsigned int temp = 0;
687 if (digest != NULL) {
688 ret = EVP_Digest(data, datalen, md, &temp, digest, NULL);
696 int EVP_MD_get_params(const EVP_MD *digest, OSSL_PARAM params[])
698 if (digest != NULL && digest->get_params != NULL)
699 return digest->get_params(params);
703 const OSSL_PARAM *EVP_MD_gettable_params(const EVP_MD *digest)
705 if (digest != NULL && digest->gettable_params != NULL)
706 return digest->gettable_params(
707 ossl_provider_ctx(EVP_MD_get0_provider(digest)));
711 int EVP_MD_CTX_set_params(EVP_MD_CTX *ctx, const OSSL_PARAM params[])
713 EVP_PKEY_CTX *pctx = ctx->pctx;
715 /* If we have a pctx then we should try that first */
717 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
718 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
719 && pctx->op.sig.algctx != NULL
720 && pctx->op.sig.signature->set_ctx_md_params != NULL)
721 return pctx->op.sig.signature->set_ctx_md_params(pctx->op.sig.algctx,
724 if (ctx->digest != NULL && ctx->digest->set_ctx_params != NULL)
725 return ctx->digest->set_ctx_params(ctx->algctx, params);
730 const OSSL_PARAM *EVP_MD_settable_ctx_params(const EVP_MD *md)
734 if (md != NULL && md->settable_ctx_params != NULL) {
735 provctx = ossl_provider_ctx(EVP_MD_get0_provider(md));
736 return md->settable_ctx_params(NULL, provctx);
741 const OSSL_PARAM *EVP_MD_CTX_settable_params(EVP_MD_CTX *ctx)
749 /* If we have a pctx then we should try that first */
752 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
753 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
754 && pctx->op.sig.algctx != NULL
755 && pctx->op.sig.signature->settable_ctx_md_params != NULL)
756 return pctx->op.sig.signature->settable_ctx_md_params(
757 pctx->op.sig.algctx);
759 if (ctx->digest != NULL && ctx->digest->settable_ctx_params != NULL) {
760 alg = ossl_provider_ctx(EVP_MD_get0_provider(ctx->digest));
761 return ctx->digest->settable_ctx_params(ctx->algctx, alg);
767 int EVP_MD_CTX_get_params(EVP_MD_CTX *ctx, OSSL_PARAM params[])
769 EVP_PKEY_CTX *pctx = ctx->pctx;
771 /* If we have a pctx then we should try that first */
773 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
774 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
775 && pctx->op.sig.algctx != NULL
776 && pctx->op.sig.signature->get_ctx_md_params != NULL)
777 return pctx->op.sig.signature->get_ctx_md_params(pctx->op.sig.algctx,
780 if (ctx->digest != NULL && ctx->digest->get_params != NULL)
781 return ctx->digest->get_ctx_params(ctx->algctx, params);
786 const OSSL_PARAM *EVP_MD_gettable_ctx_params(const EVP_MD *md)
790 if (md != NULL && md->gettable_ctx_params != NULL) {
791 provctx = ossl_provider_ctx(EVP_MD_get0_provider(md));
792 return md->gettable_ctx_params(NULL, provctx);
797 const OSSL_PARAM *EVP_MD_CTX_gettable_params(EVP_MD_CTX *ctx)
805 /* If we have a pctx then we should try that first */
808 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
809 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
810 && pctx->op.sig.algctx != NULL
811 && pctx->op.sig.signature->gettable_ctx_md_params != NULL)
812 return pctx->op.sig.signature->gettable_ctx_md_params(
813 pctx->op.sig.algctx);
815 if (ctx->digest != NULL && ctx->digest->gettable_ctx_params != NULL) {
816 provctx = ossl_provider_ctx(EVP_MD_get0_provider(ctx->digest));
817 return ctx->digest->gettable_ctx_params(ctx->algctx, provctx);
822 int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2)
824 int ret = EVP_CTRL_RET_UNSUPPORTED;
827 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
830 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
834 if (ctx->digest != NULL && ctx->digest->prov == NULL)
838 case EVP_MD_CTRL_XOF_LEN:
840 params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &sz);
842 case EVP_MD_CTRL_MICALG:
844 params[0] = OSSL_PARAM_construct_utf8_string(OSSL_DIGEST_PARAM_MICALG,
847 case EVP_CTRL_SSL3_MASTER_SECRET:
848 params[0] = OSSL_PARAM_construct_octet_string(OSSL_DIGEST_PARAM_SSL3_MS,
856 ret = EVP_MD_CTX_set_params(ctx, params);
858 ret = EVP_MD_CTX_get_params(ctx, params);
862 /* Code below to be removed when legacy support is dropped. */
864 if (ctx->digest->md_ctrl == NULL) {
865 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
869 ret = ctx->digest->md_ctrl(ctx, cmd, p1, p2);
876 EVP_MD *evp_md_new(void)
878 EVP_MD *md = OPENSSL_zalloc(sizeof(*md));
881 md->lock = CRYPTO_THREAD_lock_new();
882 if (md->lock == NULL) {
892 * FIPS module note: since internal fetches will be entirely
893 * provider based, we know that none of its code depends on legacy
894 * NIDs or any functionality that use them.
897 static void set_legacy_nid(const char *name, void *vlegacy_nid)
900 int *legacy_nid = vlegacy_nid;
902 * We use lowest level function to get the associated method, because
903 * higher level functions such as EVP_get_digestbyname() have changed
904 * to look at providers too.
906 const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_MD_METH);
908 if (*legacy_nid == -1) /* We found a clash already */
911 if (legacy_method == NULL)
913 nid = EVP_MD_nid(legacy_method);
914 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
922 static int evp_md_cache_constants(EVP_MD *md)
924 int ok, xof = 0, algid_absent = 0;
927 OSSL_PARAM params[5];
929 params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_BLOCK_SIZE, &blksz);
930 params[1] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_SIZE, &mdsize);
931 params[2] = OSSL_PARAM_construct_int(OSSL_DIGEST_PARAM_XOF, &xof);
932 params[3] = OSSL_PARAM_construct_int(OSSL_DIGEST_PARAM_ALGID_ABSENT,
934 params[4] = OSSL_PARAM_construct_end();
935 ok = evp_do_md_getparams(md, params) > 0;
936 if (mdsize > INT_MAX || blksz > INT_MAX)
939 md->block_size = (int)blksz;
940 md->md_size = (int)mdsize;
942 md->flags |= EVP_MD_FLAG_XOF;
944 md->flags |= EVP_MD_FLAG_DIGALGID_ABSENT;
949 static void *evp_md_from_algorithm(int name_id,
950 const OSSL_ALGORITHM *algodef,
953 const OSSL_DISPATCH *fns = algodef->implementation;
957 /* EVP_MD_fetch() will set the legacy NID if available */
958 if ((md = evp_md_new()) == NULL) {
959 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
964 md->type = NID_undef;
965 if (!evp_names_do_all(prov, name_id, set_legacy_nid, &md->type)
967 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
973 md->name_id = name_id;
974 if ((md->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) {
978 md->description = algodef->algorithm_description;
980 for (; fns->function_id != 0; fns++) {
981 switch (fns->function_id) {
982 case OSSL_FUNC_DIGEST_NEWCTX:
983 if (md->newctx == NULL) {
984 md->newctx = OSSL_FUNC_digest_newctx(fns);
988 case OSSL_FUNC_DIGEST_INIT:
989 if (md->dinit == NULL) {
990 md->dinit = OSSL_FUNC_digest_init(fns);
994 case OSSL_FUNC_DIGEST_UPDATE:
995 if (md->dupdate == NULL) {
996 md->dupdate = OSSL_FUNC_digest_update(fns);
1000 case OSSL_FUNC_DIGEST_FINAL:
1001 if (md->dfinal == NULL) {
1002 md->dfinal = OSSL_FUNC_digest_final(fns);
1006 case OSSL_FUNC_DIGEST_DIGEST:
1007 if (md->digest == NULL)
1008 md->digest = OSSL_FUNC_digest_digest(fns);
1009 /* We don't increment fnct for this as it is stand alone */
1011 case OSSL_FUNC_DIGEST_FREECTX:
1012 if (md->freectx == NULL) {
1013 md->freectx = OSSL_FUNC_digest_freectx(fns);
1017 case OSSL_FUNC_DIGEST_DUPCTX:
1018 if (md->dupctx == NULL)
1019 md->dupctx = OSSL_FUNC_digest_dupctx(fns);
1021 case OSSL_FUNC_DIGEST_GET_PARAMS:
1022 if (md->get_params == NULL)
1023 md->get_params = OSSL_FUNC_digest_get_params(fns);
1025 case OSSL_FUNC_DIGEST_SET_CTX_PARAMS:
1026 if (md->set_ctx_params == NULL)
1027 md->set_ctx_params = OSSL_FUNC_digest_set_ctx_params(fns);
1029 case OSSL_FUNC_DIGEST_GET_CTX_PARAMS:
1030 if (md->get_ctx_params == NULL)
1031 md->get_ctx_params = OSSL_FUNC_digest_get_ctx_params(fns);
1033 case OSSL_FUNC_DIGEST_GETTABLE_PARAMS:
1034 if (md->gettable_params == NULL)
1035 md->gettable_params = OSSL_FUNC_digest_gettable_params(fns);
1037 case OSSL_FUNC_DIGEST_SETTABLE_CTX_PARAMS:
1038 if (md->settable_ctx_params == NULL)
1039 md->settable_ctx_params =
1040 OSSL_FUNC_digest_settable_ctx_params(fns);
1042 case OSSL_FUNC_DIGEST_GETTABLE_CTX_PARAMS:
1043 if (md->gettable_ctx_params == NULL)
1044 md->gettable_ctx_params =
1045 OSSL_FUNC_digest_gettable_ctx_params(fns);
1049 if ((fncnt != 0 && fncnt != 5)
1050 || (fncnt == 0 && md->digest == NULL)) {
1052 * In order to be a consistent set of functions we either need the
1053 * whole set of init/update/final etc functions or none of them.
1054 * The "digest" function can standalone. We at least need one way to
1058 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
1063 ossl_provider_up_ref(prov);
1065 if (!evp_md_cache_constants(md)) {
1067 ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED);
1074 static int evp_md_up_ref(void *md)
1076 return EVP_MD_up_ref(md);
1079 static void evp_md_free(void *md)
1084 EVP_MD *EVP_MD_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
1085 const char *properties)
1088 evp_generic_fetch(ctx, OSSL_OP_DIGEST, algorithm, properties,
1089 evp_md_from_algorithm, evp_md_up_ref, evp_md_free);
1094 int EVP_MD_up_ref(EVP_MD *md)
1098 if (md->origin == EVP_ORIG_DYNAMIC)
1099 CRYPTO_UP_REF(&md->refcnt, &ref, md->lock);
1103 void EVP_MD_free(EVP_MD *md)
1107 if (md == NULL || md->origin != EVP_ORIG_DYNAMIC)
1110 CRYPTO_DOWN_REF(&md->refcnt, &i, md->lock);
1113 evp_md_free_int(md);
1116 void EVP_MD_do_all_provided(OSSL_LIB_CTX *libctx,
1117 void (*fn)(EVP_MD *mac, void *arg),
1120 evp_generic_do_all(libctx, OSSL_OP_DIGEST,
1121 (void (*)(void *, void *))fn, arg,
1122 evp_md_from_algorithm, evp_md_up_ref, evp_md_free);