2 * Copyright 1995-2021 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>
17 #include <openssl/engine.h>
18 #include <openssl/params.h>
19 #include <openssl/core_names.h>
20 #include "internal/cryptlib.h"
21 #include "internal/provider.h"
22 #include "internal/core.h"
23 #include "crypto/evp.h"
24 #include "evp_local.h"
27 void evp_md_ctx_clear_digest(EVP_MD_CTX *ctx, int force)
29 if (ctx->algctx != NULL) {
30 if (ctx->digest != NULL && ctx->digest->freectx != NULL)
31 ctx->digest->freectx(ctx->algctx);
33 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
36 /* Code below to be removed when legacy support is dropped. */
39 * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because
40 * sometimes only copies of the context are ever finalised.
42 if (ctx->digest && ctx->digest->cleanup
43 && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED))
44 ctx->digest->cleanup(ctx);
45 if (ctx->digest && ctx->digest->ctx_size && ctx->md_data
46 && (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE) || force))
47 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
51 #if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
52 ENGINE_finish(ctx->engine);
56 /* Non legacy code, this has to be later than the ctx->digest cleaning */
57 EVP_MD_free(ctx->fetched_digest);
58 ctx->fetched_digest = NULL;
59 ctx->reqdigest = NULL;
62 /* This call frees resources associated with the context */
63 int EVP_MD_CTX_reset(EVP_MD_CTX *ctx)
70 * pctx should be freed by the user of EVP_MD_CTX
71 * if EVP_MD_CTX_FLAG_KEEP_PKEY_CTX is set
73 if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX)) {
74 EVP_PKEY_CTX_free(ctx->pctx);
79 evp_md_ctx_clear_digest(ctx, 0);
80 OPENSSL_cleanse(ctx, sizeof(*ctx));
86 EVP_MD_CTX *evp_md_ctx_new_ex(EVP_PKEY *pkey, const ASN1_OCTET_STRING *id,
87 OSSL_LIB_CTX *libctx, const char *propq)
90 EVP_PKEY_CTX *pctx = NULL;
92 if ((ctx = EVP_MD_CTX_new()) == NULL
93 || (pctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq)) == NULL) {
94 ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
98 if (id != NULL && EVP_PKEY_CTX_set1_id(pctx, id->data, id->length) <= 0)
101 EVP_MD_CTX_set_pkey_ctx(ctx, pctx);
105 EVP_PKEY_CTX_free(pctx);
106 EVP_MD_CTX_free(ctx);
111 EVP_MD_CTX *EVP_MD_CTX_new(void)
113 return OPENSSL_zalloc(sizeof(EVP_MD_CTX));
116 void EVP_MD_CTX_free(EVP_MD_CTX *ctx)
121 EVP_MD_CTX_reset(ctx);
125 static int evp_md_init_internal(EVP_MD_CTX *ctx, const EVP_MD *type,
126 const OSSL_PARAM params[], ENGINE *impl)
128 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
129 ENGINE *tmpimpl = NULL;
132 #if !defined(FIPS_MODULE)
133 if (ctx->pctx != NULL
134 && EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx)
135 && ctx->pctx->op.sig.algctx != NULL) {
137 * Prior to OpenSSL 3.0 calling EVP_DigestInit_ex() on an mdctx
138 * previously initialised with EVP_DigestSignInit() would retain
139 * information about the key, and re-initialise for another sign
140 * operation. So in that case we redirect to EVP_DigestSignInit()
142 if (ctx->pctx->operation == EVP_PKEY_OP_SIGNCTX)
143 return EVP_DigestSignInit(ctx, NULL, type, impl, NULL);
144 if (ctx->pctx->operation == EVP_PKEY_OP_VERIFYCTX)
145 return EVP_DigestVerifyInit(ctx, NULL, type, impl, NULL);
146 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
151 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
153 if (ctx->algctx != NULL) {
154 if (!ossl_assert(ctx->digest != NULL)) {
155 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
158 if (ctx->digest->freectx != NULL)
159 ctx->digest->freectx(ctx->algctx);
164 ctx->reqdigest = type;
166 if (ctx->digest == NULL) {
167 ERR_raise(ERR_LIB_EVP, EVP_R_NO_DIGEST_SET);
173 /* Code below to be removed when legacy support is dropped. */
174 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
176 * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
177 * this context may already have an ENGINE! Try to avoid releasing the
178 * previous handle, re-querying for an ENGINE, and having a
179 * reinitialisation, when it may all be unnecessary.
181 if (ctx->engine && ctx->digest &&
182 (type == NULL || (type->type == ctx->digest->type)))
187 * Ensure an ENGINE left lying around from last time is cleared (the
188 * previous check attempted to avoid this if the same ENGINE and
189 * EVP_MD could be used).
191 ENGINE_finish(ctx->engine);
195 if (type != NULL && impl == NULL)
196 tmpimpl = ENGINE_get_digest_engine(type->type);
200 * If there are engines involved or EVP_MD_CTX_FLAG_NO_INIT is set then we
201 * should use legacy handling for now.
203 if (ctx->engine != NULL
205 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
208 || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0) {
209 if (ctx->digest == ctx->fetched_digest)
211 EVP_MD_free(ctx->fetched_digest);
212 ctx->fetched_digest = NULL;
216 if (ctx->digest != NULL && ctx->digest->ctx_size > 0) {
217 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
221 /* Start of non-legacy code below */
223 if (type->prov == NULL) {
225 /* We only do explicit fetches inside the FIPS module */
226 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
229 EVP_MD *provmd = EVP_MD_fetch(NULL, OBJ_nid2sn(type->type), "");
231 if (provmd == NULL) {
232 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
236 EVP_MD_free(ctx->fetched_digest);
237 ctx->fetched_digest = provmd;
241 if (ctx->algctx != NULL && ctx->digest != NULL && ctx->digest != type) {
242 if (ctx->digest->freectx != NULL)
243 ctx->digest->freectx(ctx->algctx);
246 if (type->prov != NULL && ctx->fetched_digest != type) {
247 if (!EVP_MD_up_ref((EVP_MD *)type)) {
248 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
251 EVP_MD_free(ctx->fetched_digest);
252 ctx->fetched_digest = (EVP_MD *)type;
255 if (ctx->algctx == NULL) {
256 ctx->algctx = ctx->digest->newctx(ossl_provider_ctx(type->prov));
257 if (ctx->algctx == NULL) {
258 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
263 if (ctx->digest->dinit == NULL) {
264 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
268 return ctx->digest->dinit(ctx->algctx, params);
270 /* Code below to be removed when legacy support is dropped. */
273 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
276 if (!ENGINE_init(impl)) {
277 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
281 /* Ask if an ENGINE is reserved for this job */
285 /* There's an ENGINE for this job ... (apparently) */
286 const EVP_MD *d = ENGINE_get_digest(impl, type->type);
289 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
293 /* We'll use the ENGINE's private digest definition */
296 * Store the ENGINE functional reference so we know 'type' came
297 * from an ENGINE and we need to release it when done.
304 if (ctx->digest != type) {
305 if (ctx->digest && ctx->digest->ctx_size) {
306 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
310 if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) {
311 ctx->update = type->update;
312 ctx->md_data = OPENSSL_zalloc(type->ctx_size);
313 if (ctx->md_data == NULL) {
314 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
319 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
323 if (ctx->pctx != NULL
324 && (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx)
325 || ctx->pctx->op.sig.signature == NULL)) {
327 r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG,
328 EVP_PKEY_CTRL_DIGESTINIT, 0, ctx);
329 if (r <= 0 && (r != -2))
333 if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
335 return ctx->digest->init(ctx);
338 int EVP_DigestInit_ex2(EVP_MD_CTX *ctx, const EVP_MD *type,
339 const OSSL_PARAM params[])
341 return evp_md_init_internal(ctx, type, params, NULL);
344 int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
346 EVP_MD_CTX_reset(ctx);
347 return evp_md_init_internal(ctx, type, NULL, NULL);
350 int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
352 return evp_md_init_internal(ctx, type, NULL, impl);
355 int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
360 if (ctx->pctx != NULL
361 && EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx)
362 && ctx->pctx->op.sig.algctx != NULL) {
364 * Prior to OpenSSL 3.0 EVP_DigestSignUpdate() and
365 * EVP_DigestVerifyUpdate() were just macros for EVP_DigestUpdate().
366 * Some code calls EVP_DigestUpdate() directly even when initialised
367 * with EVP_DigestSignInit_ex() or
368 * EVP_DigestVerifyInit_ex(), so we detect that and redirect to
369 * the correct EVP_Digest*Update() function
371 if (ctx->pctx->operation == EVP_PKEY_OP_SIGNCTX)
372 return EVP_DigestSignUpdate(ctx, data, count);
373 if (ctx->pctx->operation == EVP_PKEY_OP_VERIFYCTX)
374 return EVP_DigestVerifyUpdate(ctx, data, count);
375 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
379 if (ctx->digest == NULL
380 || ctx->digest->prov == NULL
381 || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0)
384 if (ctx->digest->dupdate == NULL) {
385 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
388 return ctx->digest->dupdate(ctx->algctx, data, count);
390 /* Code below to be removed when legacy support is dropped. */
392 return ctx->update(ctx, data, count);
395 /* The caller can assume that this removes any secret data from the context */
396 int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
399 ret = EVP_DigestFinal_ex(ctx, md, size);
400 EVP_MD_CTX_reset(ctx);
404 /* The caller can assume that this removes any secret data from the context */
405 int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *isize)
411 if (ctx->digest == NULL)
414 sz = EVP_MD_get_size(ctx->digest);
418 if (ctx->digest->prov == NULL)
421 if (ctx->digest->dfinal == NULL) {
422 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
426 ret = ctx->digest->dfinal(ctx->algctx, md, &size, mdsize);
429 if (size <= UINT_MAX) {
432 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
439 /* Code below to be removed when legacy support is dropped. */
441 OPENSSL_assert(mdsize <= EVP_MAX_MD_SIZE);
442 ret = ctx->digest->final(ctx, md);
445 if (ctx->digest->cleanup) {
446 ctx->digest->cleanup(ctx);
447 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
449 OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
453 int EVP_DigestFinalXOF(EVP_MD_CTX *ctx, unsigned char *md, size_t size)
456 OSSL_PARAM params[2];
459 if (ctx->digest == NULL) {
460 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_NULL_ALGORITHM);
464 if (ctx->digest->prov == NULL)
467 if (ctx->digest->dfinal == NULL) {
468 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
472 params[i++] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &size);
473 params[i++] = OSSL_PARAM_construct_end();
475 if (EVP_MD_CTX_set_params(ctx, params) > 0)
476 ret = ctx->digest->dfinal(ctx->algctx, md, &size, size);
481 if (ctx->digest->flags & EVP_MD_FLAG_XOF
483 && ctx->digest->md_ctrl(ctx, EVP_MD_CTRL_XOF_LEN, (int)size, NULL)) {
484 ret = ctx->digest->final(ctx, md);
485 if (ctx->digest->cleanup != NULL) {
486 ctx->digest->cleanup(ctx);
487 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
489 OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
491 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_XOF_OR_INVALID_LENGTH);
497 int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
499 EVP_MD_CTX_reset(out);
500 return EVP_MD_CTX_copy_ex(out, in);
503 int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
505 unsigned char *tmp_buf;
507 if (in == NULL || in->digest == NULL) {
508 ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED);
512 if (in->digest->prov == NULL
513 || (in->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0)
516 if (in->digest->dupctx == NULL) {
517 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
521 EVP_MD_CTX_reset(out);
522 if (out->fetched_digest != NULL)
523 EVP_MD_free(out->fetched_digest);
525 /* NULL out pointers in case of error */
529 if (in->fetched_digest != NULL)
530 EVP_MD_up_ref(in->fetched_digest);
532 if (in->algctx != NULL) {
533 out->algctx = in->digest->dupctx(in->algctx);
534 if (out->algctx == NULL) {
535 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
540 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
541 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
543 if (in->pctx != NULL) {
544 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
545 if (out->pctx == NULL) {
546 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
547 EVP_MD_CTX_reset(out);
555 /* Code below to be removed when legacy support is dropped. */
557 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
558 /* Make sure it's safe to copy a digest context using an ENGINE */
559 if (in->engine && !ENGINE_init(in->engine)) {
560 ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB);
565 if (out->digest == in->digest) {
566 tmp_buf = out->md_data;
567 EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE);
570 EVP_MD_CTX_reset(out);
571 memcpy(out, in, sizeof(*out));
573 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
574 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
576 /* Null these variables, since they are getting fixed up
577 * properly below. Anything else may cause a memleak and/or
578 * double free if any of the memory allocations below fail
583 if (in->md_data && out->digest->ctx_size) {
585 out->md_data = tmp_buf;
587 out->md_data = OPENSSL_malloc(out->digest->ctx_size);
588 if (out->md_data == NULL) {
589 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
593 memcpy(out->md_data, in->md_data, out->digest->ctx_size);
596 out->update = in->update;
600 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
602 EVP_MD_CTX_reset(out);
608 if (out->digest->copy)
609 return out->digest->copy(out, in);
614 int EVP_Digest(const void *data, size_t count,
615 unsigned char *md, unsigned int *size, const EVP_MD *type,
618 EVP_MD_CTX *ctx = EVP_MD_CTX_new();
623 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_ONESHOT);
624 ret = EVP_DigestInit_ex(ctx, type, impl)
625 && EVP_DigestUpdate(ctx, data, count)
626 && EVP_DigestFinal_ex(ctx, md, size);
627 EVP_MD_CTX_free(ctx);
632 int EVP_Q_digest(OSSL_LIB_CTX *libctx, const char *name, const char *propq,
633 const void *data, size_t count,
634 unsigned char *md, unsigned int *size)
636 EVP_MD *digest = EVP_MD_fetch(libctx, name, propq);
639 if (digest != NULL) {
640 ret = EVP_Digest(data, count, md, size, digest, NULL);
646 int EVP_MD_get_params(const EVP_MD *digest, OSSL_PARAM params[])
648 if (digest != NULL && digest->get_params != NULL)
649 return digest->get_params(params);
653 const OSSL_PARAM *EVP_MD_gettable_params(const EVP_MD *digest)
655 if (digest != NULL && digest->gettable_params != NULL)
656 return digest->gettable_params(
657 ossl_provider_ctx(EVP_MD_get0_provider(digest)));
661 int EVP_MD_CTX_set_params(EVP_MD_CTX *ctx, const OSSL_PARAM params[])
663 EVP_PKEY_CTX *pctx = ctx->pctx;
665 /* If we have a pctx then we should try that first */
667 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
668 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
669 && pctx->op.sig.algctx != NULL
670 && pctx->op.sig.signature->set_ctx_md_params != NULL)
671 return pctx->op.sig.signature->set_ctx_md_params(pctx->op.sig.algctx,
674 if (ctx->digest != NULL && ctx->digest->set_ctx_params != NULL)
675 return ctx->digest->set_ctx_params(ctx->algctx, params);
680 const OSSL_PARAM *EVP_MD_settable_ctx_params(const EVP_MD *md)
684 if (md != NULL && md->settable_ctx_params != NULL) {
685 provctx = ossl_provider_ctx(EVP_MD_get0_provider(md));
686 return md->settable_ctx_params(NULL, provctx);
691 const OSSL_PARAM *EVP_MD_CTX_settable_params(EVP_MD_CTX *ctx)
699 /* If we have a pctx then we should try that first */
702 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
703 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
704 && pctx->op.sig.algctx != NULL
705 && pctx->op.sig.signature->settable_ctx_md_params != NULL)
706 return pctx->op.sig.signature->settable_ctx_md_params(
707 pctx->op.sig.algctx);
709 if (ctx->digest != NULL && ctx->digest->settable_ctx_params != NULL) {
710 alg = ossl_provider_ctx(EVP_MD_get0_provider(ctx->digest));
711 return ctx->digest->settable_ctx_params(ctx->algctx, alg);
717 int EVP_MD_CTX_get_params(EVP_MD_CTX *ctx, OSSL_PARAM params[])
719 EVP_PKEY_CTX *pctx = ctx->pctx;
721 /* If we have a pctx then we should try that first */
723 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
724 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
725 && pctx->op.sig.algctx != NULL
726 && pctx->op.sig.signature->get_ctx_md_params != NULL)
727 return pctx->op.sig.signature->get_ctx_md_params(pctx->op.sig.algctx,
730 if (ctx->digest != NULL && ctx->digest->get_params != NULL)
731 return ctx->digest->get_ctx_params(ctx->algctx, params);
736 const OSSL_PARAM *EVP_MD_gettable_ctx_params(const EVP_MD *md)
740 if (md != NULL && md->gettable_ctx_params != NULL) {
741 provctx = ossl_provider_ctx(EVP_MD_get0_provider(md));
742 return md->gettable_ctx_params(NULL, provctx);
747 const OSSL_PARAM *EVP_MD_CTX_gettable_params(EVP_MD_CTX *ctx)
755 /* If we have a pctx then we should try that first */
758 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
759 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
760 && pctx->op.sig.algctx != NULL
761 && pctx->op.sig.signature->gettable_ctx_md_params != NULL)
762 return pctx->op.sig.signature->gettable_ctx_md_params(
763 pctx->op.sig.algctx);
765 if (ctx->digest != NULL && ctx->digest->gettable_ctx_params != NULL) {
766 provctx = ossl_provider_ctx(EVP_MD_get0_provider(ctx->digest));
767 return ctx->digest->gettable_ctx_params(ctx->algctx, provctx);
772 int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2)
774 int ret = EVP_CTRL_RET_UNSUPPORTED;
777 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
780 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
784 if (ctx->digest != NULL && ctx->digest->prov == NULL)
788 case EVP_MD_CTRL_XOF_LEN:
790 params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &sz);
792 case EVP_MD_CTRL_MICALG:
794 params[0] = OSSL_PARAM_construct_utf8_string(OSSL_DIGEST_PARAM_MICALG,
797 case EVP_CTRL_SSL3_MASTER_SECRET:
798 params[0] = OSSL_PARAM_construct_octet_string(OSSL_DIGEST_PARAM_SSL3_MS,
806 ret = EVP_MD_CTX_set_params(ctx, params);
808 ret = EVP_MD_CTX_get_params(ctx, params);
812 /* Code below to be removed when legacy support is dropped. */
814 if (ctx->digest->md_ctrl == NULL) {
815 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
819 ret = ctx->digest->md_ctrl(ctx, cmd, p1, p2);
826 EVP_MD *evp_md_new(void)
828 EVP_MD *md = OPENSSL_zalloc(sizeof(*md));
831 md->lock = CRYPTO_THREAD_lock_new();
832 if (md->lock == NULL) {
842 * FIPS module note: since internal fetches will be entirely
843 * provider based, we know that none of its code depends on legacy
844 * NIDs or any functionality that use them.
847 static void set_legacy_nid(const char *name, void *vlegacy_nid)
850 int *legacy_nid = vlegacy_nid;
852 * We use lowest level function to get the associated method, because
853 * higher level functions such as EVP_get_digestbyname() have changed
854 * to look at providers too.
856 const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_MD_METH);
858 if (*legacy_nid == -1) /* We found a clash already */
861 if (legacy_method == NULL)
863 nid = EVP_MD_nid(legacy_method);
864 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
872 static int evp_md_cache_constants(EVP_MD *md)
874 int ok, xof = 0, algid_absent = 0;
877 OSSL_PARAM params[5];
879 params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_BLOCK_SIZE, &blksz);
880 params[1] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_SIZE, &mdsize);
881 params[2] = OSSL_PARAM_construct_int(OSSL_DIGEST_PARAM_XOF, &xof);
882 params[3] = OSSL_PARAM_construct_int(OSSL_DIGEST_PARAM_ALGID_ABSENT,
884 params[4] = OSSL_PARAM_construct_end();
885 ok = evp_do_md_getparams(md, params) > 0;
886 if (mdsize > INT_MAX || blksz > INT_MAX)
889 md->block_size = (int)blksz;
890 md->md_size = (int)mdsize;
892 md->flags |= EVP_MD_FLAG_XOF;
894 md->flags |= EVP_MD_FLAG_DIGALGID_ABSENT;
899 static void *evp_md_from_algorithm(int name_id,
900 const OSSL_ALGORITHM *algodef,
903 const OSSL_DISPATCH *fns = algodef->implementation;
907 /* EVP_MD_fetch() will set the legacy NID if available */
908 if ((md = evp_md_new()) == NULL) {
909 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
914 md->type = NID_undef;
915 if (!evp_names_do_all(prov, name_id, set_legacy_nid, &md->type)
917 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
923 md->name_id = name_id;
924 if ((md->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) {
928 md->description = algodef->algorithm_description;
930 for (; fns->function_id != 0; fns++) {
931 switch (fns->function_id) {
932 case OSSL_FUNC_DIGEST_NEWCTX:
933 if (md->newctx == NULL) {
934 md->newctx = OSSL_FUNC_digest_newctx(fns);
938 case OSSL_FUNC_DIGEST_INIT:
939 if (md->dinit == NULL) {
940 md->dinit = OSSL_FUNC_digest_init(fns);
944 case OSSL_FUNC_DIGEST_UPDATE:
945 if (md->dupdate == NULL) {
946 md->dupdate = OSSL_FUNC_digest_update(fns);
950 case OSSL_FUNC_DIGEST_FINAL:
951 if (md->dfinal == NULL) {
952 md->dfinal = OSSL_FUNC_digest_final(fns);
956 case OSSL_FUNC_DIGEST_DIGEST:
957 if (md->digest == NULL)
958 md->digest = OSSL_FUNC_digest_digest(fns);
959 /* We don't increment fnct for this as it is stand alone */
961 case OSSL_FUNC_DIGEST_FREECTX:
962 if (md->freectx == NULL) {
963 md->freectx = OSSL_FUNC_digest_freectx(fns);
967 case OSSL_FUNC_DIGEST_DUPCTX:
968 if (md->dupctx == NULL)
969 md->dupctx = OSSL_FUNC_digest_dupctx(fns);
971 case OSSL_FUNC_DIGEST_GET_PARAMS:
972 if (md->get_params == NULL)
973 md->get_params = OSSL_FUNC_digest_get_params(fns);
975 case OSSL_FUNC_DIGEST_SET_CTX_PARAMS:
976 if (md->set_ctx_params == NULL)
977 md->set_ctx_params = OSSL_FUNC_digest_set_ctx_params(fns);
979 case OSSL_FUNC_DIGEST_GET_CTX_PARAMS:
980 if (md->get_ctx_params == NULL)
981 md->get_ctx_params = OSSL_FUNC_digest_get_ctx_params(fns);
983 case OSSL_FUNC_DIGEST_GETTABLE_PARAMS:
984 if (md->gettable_params == NULL)
985 md->gettable_params = OSSL_FUNC_digest_gettable_params(fns);
987 case OSSL_FUNC_DIGEST_SETTABLE_CTX_PARAMS:
988 if (md->settable_ctx_params == NULL)
989 md->settable_ctx_params =
990 OSSL_FUNC_digest_settable_ctx_params(fns);
992 case OSSL_FUNC_DIGEST_GETTABLE_CTX_PARAMS:
993 if (md->gettable_ctx_params == NULL)
994 md->gettable_ctx_params =
995 OSSL_FUNC_digest_gettable_ctx_params(fns);
999 if ((fncnt != 0 && fncnt != 5)
1000 || (fncnt == 0 && md->digest == NULL)) {
1002 * In order to be a consistent set of functions we either need the
1003 * whole set of init/update/final etc functions or none of them.
1004 * The "digest" function can standalone. We at least need one way to
1008 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
1013 ossl_provider_up_ref(prov);
1015 if (!evp_md_cache_constants(md)) {
1017 ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED);
1024 static int evp_md_up_ref(void *md)
1026 return EVP_MD_up_ref(md);
1029 static void evp_md_free(void *md)
1034 EVP_MD *EVP_MD_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
1035 const char *properties)
1038 evp_generic_fetch(ctx, OSSL_OP_DIGEST, algorithm, properties,
1039 evp_md_from_algorithm, evp_md_up_ref, evp_md_free);
1044 int EVP_MD_up_ref(EVP_MD *md)
1048 if (md->origin == EVP_ORIG_DYNAMIC)
1049 CRYPTO_UP_REF(&md->refcnt, &ref, md->lock);
1053 void EVP_MD_free(EVP_MD *md)
1057 if (md == NULL || md->origin != EVP_ORIG_DYNAMIC)
1060 CRYPTO_DOWN_REF(&md->refcnt, &i, md->lock);
1063 evp_md_free_int(md);
1066 void EVP_MD_do_all_provided(OSSL_LIB_CTX *libctx,
1067 void (*fn)(EVP_MD *mac, void *arg),
1070 evp_generic_do_all(libctx, OSSL_OP_DIGEST,
1071 (void (*)(void *, void *))fn, arg,
1072 evp_md_from_algorithm, evp_md_up_ref, evp_md_free);