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 EVP_MD_free(ctx
->fetched_digest
);
38 ctx
->fetched_digest
= NULL
;
39 ctx
->reqdigest
= NULL
;
41 if (ctx
->provctx
!= NULL
) {
42 if (ctx
->digest
->freectx
!= NULL
)
43 ctx
->digest
->freectx(ctx
->provctx
);
45 EVP_MD_CTX_set_flags(ctx
, EVP_MD_CTX_FLAG_CLEANED
);
48 /* TODO(3.0): Remove legacy code below */
51 * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because
52 * sometimes only copies of the context are ever finalised.
54 if (ctx
->digest
&& ctx
->digest
->cleanup
55 && !EVP_MD_CTX_test_flags(ctx
, EVP_MD_CTX_FLAG_CLEANED
))
56 ctx
->digest
->cleanup(ctx
);
57 if (ctx
->digest
&& ctx
->digest
->ctx_size
&& ctx
->md_data
58 && !EVP_MD_CTX_test_flags(ctx
, EVP_MD_CTX_FLAG_REUSE
)) {
59 OPENSSL_clear_free(ctx
->md_data
, ctx
->digest
->ctx_size
);
62 #if !defined(FIPS_MODE) && !defined(OPENSSL_NO_ENGINE)
63 ENGINE_finish(ctx
->engine
);
66 /* TODO(3.0): End of legacy code */
68 OPENSSL_cleanse(ctx
, sizeof(*ctx
));
73 EVP_MD_CTX
*EVP_MD_CTX_new(void)
75 return OPENSSL_zalloc(sizeof(EVP_MD_CTX
));
78 void EVP_MD_CTX_free(EVP_MD_CTX
*ctx
)
83 EVP_MD_CTX_reset(ctx
);
89 int EVP_DigestInit(EVP_MD_CTX
*ctx
, const EVP_MD
*type
)
91 EVP_MD_CTX_reset(ctx
);
92 return EVP_DigestInit_ex(ctx
, type
, NULL
);
95 int EVP_DigestInit_ex(EVP_MD_CTX
*ctx
, const EVP_MD
*type
, ENGINE
*impl
)
97 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
98 ENGINE
*tmpimpl
= NULL
;
101 EVP_MD_CTX_clear_flags(ctx
, EVP_MD_CTX_FLAG_CLEANED
);
103 if (ctx
->provctx
!= NULL
) {
104 if (!ossl_assert(ctx
->digest
!= NULL
)) {
105 EVPerr(EVP_F_EVP_DIGESTINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
108 if (ctx
->digest
->freectx
!= NULL
)
109 ctx
->digest
->freectx(ctx
->provctx
);
114 ctx
->reqdigest
= type
;
116 /* TODO(3.0): Legacy work around code below. Remove this */
117 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
119 * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
120 * this context may already have an ENGINE! Try to avoid releasing the
121 * previous handle, re-querying for an ENGINE, and having a
122 * reinitialisation, when it may all be unnecessary.
124 if (ctx
->engine
&& ctx
->digest
&&
125 (type
== NULL
|| (type
->type
== ctx
->digest
->type
)))
130 * Ensure an ENGINE left lying around from last time is cleared (the
131 * previous check attempted to avoid this if the same ENGINE and
132 * EVP_MD could be used).
134 ENGINE_finish(ctx
->engine
);
138 if (type
!= NULL
&& impl
== NULL
)
139 tmpimpl
= ENGINE_get_digest_engine(type
->type
);
143 * If there are engines involved or EVP_MD_CTX_FLAG_NO_INIT is set then we
144 * should use legacy handling for now.
146 if (ctx
->engine
!= NULL
148 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
151 || (ctx
->flags
& EVP_MD_CTX_FLAG_NO_INIT
) != 0) {
152 if (ctx
->digest
== ctx
->fetched_digest
)
154 EVP_MD_free(ctx
->fetched_digest
);
155 ctx
->fetched_digest
= NULL
;
159 if (ctx
->digest
!= NULL
&& ctx
->digest
->ctx_size
> 0) {
160 OPENSSL_clear_free(ctx
->md_data
, ctx
->digest
->ctx_size
);
164 /* TODO(3.0): Start of non-legacy code below */
166 if (type
->prov
== NULL
) {
168 /* We only do explicit fetches inside the FIPS module */
169 EVPerr(EVP_F_EVP_DIGESTINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
172 EVP_MD
*provmd
= EVP_MD_fetch(NULL
, OBJ_nid2sn(type
->type
), "");
174 if (provmd
== NULL
) {
175 EVPerr(EVP_F_EVP_DIGESTINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
179 EVP_MD_free(ctx
->fetched_digest
);
180 ctx
->fetched_digest
= provmd
;
184 if (ctx
->provctx
!= NULL
&& ctx
->digest
!= NULL
&& ctx
->digest
!= type
) {
185 if (ctx
->digest
->freectx
!= NULL
)
186 ctx
->digest
->freectx(ctx
->provctx
);
190 if (ctx
->provctx
== NULL
) {
191 ctx
->provctx
= ctx
->digest
->newctx(ossl_provider_ctx(type
->prov
));
192 if (ctx
->provctx
== NULL
) {
193 EVPerr(EVP_F_EVP_DIGESTINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
198 if (ctx
->digest
->dinit
== NULL
) {
199 EVPerr(EVP_F_EVP_DIGESTINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
203 return ctx
->digest
->dinit(ctx
->provctx
);
205 /* TODO(3.0): Remove legacy code below */
208 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
211 if (!ENGINE_init(impl
)) {
212 EVPerr(EVP_F_EVP_DIGESTINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
216 /* Ask if an ENGINE is reserved for this job */
220 /* There's an ENGINE for this job ... (apparently) */
221 const EVP_MD
*d
= ENGINE_get_digest(impl
, type
->type
);
224 EVPerr(EVP_F_EVP_DIGESTINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
228 /* We'll use the ENGINE's private digest definition */
231 * Store the ENGINE functional reference so we know 'type' came
232 * from an ENGINE and we need to release it when done.
239 EVPerr(EVP_F_EVP_DIGESTINIT_EX
, EVP_R_NO_DIGEST_SET
);
245 if (ctx
->digest
!= type
) {
246 if (ctx
->digest
&& ctx
->digest
->ctx_size
) {
247 OPENSSL_clear_free(ctx
->md_data
, ctx
->digest
->ctx_size
);
251 if (!(ctx
->flags
& EVP_MD_CTX_FLAG_NO_INIT
) && type
->ctx_size
) {
252 ctx
->update
= type
->update
;
253 ctx
->md_data
= OPENSSL_zalloc(type
->ctx_size
);
254 if (ctx
->md_data
== NULL
) {
255 EVPerr(EVP_F_EVP_DIGESTINIT_EX
, ERR_R_MALLOC_FAILURE
);
260 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
265 * TODO(3.0): Temporarily no support for EVP_DigestSign* inside FIPS module
266 * or when using providers.
268 if (ctx
->pctx
!= NULL
269 && (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx
->pctx
)
270 || ctx
->pctx
->op
.sig
.signature
== NULL
)) {
272 r
= EVP_PKEY_CTX_ctrl(ctx
->pctx
, -1, EVP_PKEY_OP_TYPE_SIG
,
273 EVP_PKEY_CTRL_DIGESTINIT
, 0, ctx
);
274 if (r
<= 0 && (r
!= -2))
278 if (ctx
->flags
& EVP_MD_CTX_FLAG_NO_INIT
)
280 return ctx
->digest
->init(ctx
);
283 int EVP_DigestUpdate(EVP_MD_CTX
*ctx
, const void *data
, size_t count
)
288 if (ctx
->pctx
!= NULL
289 && EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx
->pctx
)
290 && ctx
->pctx
->op
.sig
.sigprovctx
!= NULL
) {
292 * Prior to OpenSSL 3.0 EVP_DigestSignUpdate() and
293 * EVP_DigestVerifyUpdate() were just macros for EVP_DigestUpdate().
294 * Some code calls EVP_DigestUpdate() directly even when initialised
295 * with EVP_DigestSignInit_ex() or EVP_DigestVerifyInit_ex(), so we
296 * detect that and redirect to the correct EVP_Digest*Update() function
298 if (ctx
->pctx
->operation
== EVP_PKEY_OP_SIGNCTX
)
299 return EVP_DigestSignUpdate(ctx
, data
, count
);
300 if (ctx
->pctx
->operation
== EVP_PKEY_OP_VERIFYCTX
)
301 return EVP_DigestVerifyUpdate(ctx
, data
, count
);
302 EVPerr(EVP_F_EVP_DIGESTUPDATE
, EVP_R_UPDATE_ERROR
);
306 if (ctx
->digest
== NULL
307 || ctx
->digest
->prov
== NULL
308 || (ctx
->flags
& EVP_MD_CTX_FLAG_NO_INIT
) != 0)
311 if (ctx
->digest
->dupdate
== NULL
) {
312 EVPerr(EVP_F_EVP_DIGESTUPDATE
, EVP_R_UPDATE_ERROR
);
315 return ctx
->digest
->dupdate(ctx
->provctx
, data
, count
);
317 /* TODO(3.0): Remove legacy code below */
319 return ctx
->update(ctx
, data
, count
);
322 /* The caller can assume that this removes any secret data from the context */
323 int EVP_DigestFinal(EVP_MD_CTX
*ctx
, unsigned char *md
, unsigned int *size
)
326 ret
= EVP_DigestFinal_ex(ctx
, md
, size
);
327 EVP_MD_CTX_reset(ctx
);
331 /* The caller can assume that this removes any secret data from the context */
332 int EVP_DigestFinal_ex(EVP_MD_CTX
*ctx
, unsigned char *md
, unsigned int *isize
)
336 size_t mdsize
= EVP_MD_size(ctx
->digest
);
338 if (ctx
->digest
== NULL
|| ctx
->digest
->prov
== NULL
)
341 if (ctx
->digest
->dfinal
== NULL
) {
342 EVPerr(EVP_F_EVP_DIGESTFINAL_EX
, EVP_R_FINAL_ERROR
);
346 ret
= ctx
->digest
->dfinal(ctx
->provctx
, md
, &size
, mdsize
);
349 if (size
<= UINT_MAX
) {
352 EVPerr(EVP_F_EVP_DIGESTFINAL_EX
, EVP_R_FINAL_ERROR
);
359 /* TODO(3.0): Remove legacy code below */
361 OPENSSL_assert(mdsize
<= EVP_MAX_MD_SIZE
);
362 ret
= ctx
->digest
->final(ctx
, md
);
365 if (ctx
->digest
->cleanup
) {
366 ctx
->digest
->cleanup(ctx
);
367 EVP_MD_CTX_set_flags(ctx
, EVP_MD_CTX_FLAG_CLEANED
);
369 OPENSSL_cleanse(ctx
->md_data
, ctx
->digest
->ctx_size
);
373 int EVP_DigestFinalXOF(EVP_MD_CTX
*ctx
, unsigned char *md
, size_t size
)
376 OSSL_PARAM params
[2];
379 if (ctx
->digest
== NULL
|| ctx
->digest
->prov
== NULL
)
382 if (ctx
->digest
->dfinal
== NULL
) {
383 EVPerr(EVP_F_EVP_DIGESTFINALXOF
, EVP_R_FINAL_ERROR
);
387 params
[i
++] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN
, &size
);
388 params
[i
++] = OSSL_PARAM_construct_end();
390 if (EVP_MD_CTX_set_params(ctx
, params
) > 0)
391 ret
= ctx
->digest
->dfinal(ctx
->provctx
, md
, &size
, size
);
392 EVP_MD_CTX_reset(ctx
);
396 if (ctx
->digest
->flags
& EVP_MD_FLAG_XOF
398 && ctx
->digest
->md_ctrl(ctx
, EVP_MD_CTRL_XOF_LEN
, (int)size
, NULL
)) {
399 ret
= ctx
->digest
->final(ctx
, md
);
400 if (ctx
->digest
->cleanup
!= NULL
) {
401 ctx
->digest
->cleanup(ctx
);
402 EVP_MD_CTX_set_flags(ctx
, EVP_MD_CTX_FLAG_CLEANED
);
404 OPENSSL_cleanse(ctx
->md_data
, ctx
->digest
->ctx_size
);
406 EVPerr(EVP_F_EVP_DIGESTFINALXOF
, EVP_R_NOT_XOF_OR_INVALID_LENGTH
);
412 int EVP_MD_CTX_copy(EVP_MD_CTX
*out
, const EVP_MD_CTX
*in
)
414 EVP_MD_CTX_reset(out
);
415 return EVP_MD_CTX_copy_ex(out
, in
);
418 int EVP_MD_CTX_copy_ex(EVP_MD_CTX
*out
, const EVP_MD_CTX
*in
)
420 unsigned char *tmp_buf
;
422 if (in
== NULL
|| in
->digest
== NULL
) {
423 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX
, EVP_R_INPUT_NOT_INITIALIZED
);
427 if (in
->digest
->prov
== NULL
428 || (in
->flags
& EVP_MD_CTX_FLAG_NO_INIT
) != 0)
431 if (in
->digest
->dupctx
== NULL
) {
432 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX
, EVP_R_NOT_ABLE_TO_COPY_CTX
);
436 EVP_MD_CTX_reset(out
);
437 if (out
->fetched_digest
!= NULL
)
438 EVP_MD_free(out
->fetched_digest
);
440 /* NULL out pointers in case of error */
444 if (in
->fetched_digest
!= NULL
)
445 EVP_MD_up_ref(in
->fetched_digest
);
447 out
->provctx
= in
->digest
->dupctx(in
->provctx
);
448 if (out
->provctx
== NULL
) {
449 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX
, EVP_R_NOT_ABLE_TO_COPY_CTX
);
453 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
454 EVP_MD_CTX_clear_flags(out
, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX
);
456 /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */
457 if (in
->pctx
!= NULL
) {
458 out
->pctx
= EVP_PKEY_CTX_dup(in
->pctx
);
459 if (out
->pctx
== NULL
) {
460 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX
, EVP_R_NOT_ABLE_TO_COPY_CTX
);
461 EVP_MD_CTX_reset(out
);
469 /* TODO(3.0): Remove legacy code below */
471 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
472 /* Make sure it's safe to copy a digest context using an ENGINE */
473 if (in
->engine
&& !ENGINE_init(in
->engine
)) {
474 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX
, ERR_R_ENGINE_LIB
);
479 if (out
->digest
== in
->digest
) {
480 tmp_buf
= out
->md_data
;
481 EVP_MD_CTX_set_flags(out
, EVP_MD_CTX_FLAG_REUSE
);
484 EVP_MD_CTX_reset(out
);
485 memcpy(out
, in
, sizeof(*out
));
487 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
488 EVP_MD_CTX_clear_flags(out
, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX
);
490 /* Null these variables, since they are getting fixed up
491 * properly below. Anything else may cause a memleak and/or
492 * double free if any of the memory allocations below fail
497 if (in
->md_data
&& out
->digest
->ctx_size
) {
499 out
->md_data
= tmp_buf
;
501 out
->md_data
= OPENSSL_malloc(out
->digest
->ctx_size
);
502 if (out
->md_data
== NULL
) {
503 EVPerr(EVP_F_EVP_MD_CTX_COPY_EX
, ERR_R_MALLOC_FAILURE
);
507 memcpy(out
->md_data
, in
->md_data
, out
->digest
->ctx_size
);
510 out
->update
= in
->update
;
513 /* TODO(3.0): Temporarily no support for EVP_DigestSign* in FIPS module */
515 out
->pctx
= EVP_PKEY_CTX_dup(in
->pctx
);
517 EVP_MD_CTX_reset(out
);
523 if (out
->digest
->copy
)
524 return out
->digest
->copy(out
, in
);
529 int EVP_Digest(const void *data
, size_t count
,
530 unsigned char *md
, unsigned int *size
, const EVP_MD
*type
,
533 EVP_MD_CTX
*ctx
= EVP_MD_CTX_new();
538 EVP_MD_CTX_set_flags(ctx
, EVP_MD_CTX_FLAG_ONESHOT
);
539 ret
= EVP_DigestInit_ex(ctx
, type
, impl
)
540 && EVP_DigestUpdate(ctx
, data
, count
)
541 && EVP_DigestFinal_ex(ctx
, md
, size
);
542 EVP_MD_CTX_free(ctx
);
547 int EVP_MD_get_params(const EVP_MD
*digest
, OSSL_PARAM params
[])
549 if (digest
!= NULL
&& digest
->get_params
!= NULL
)
550 return digest
->get_params(params
);
554 const OSSL_PARAM
*EVP_MD_gettable_params(const EVP_MD
*digest
)
556 if (digest
!= NULL
&& digest
->gettable_params
!= NULL
)
557 return digest
->gettable_params();
561 int EVP_MD_CTX_set_params(EVP_MD_CTX
*ctx
, const OSSL_PARAM params
[])
563 EVP_PKEY_CTX
*pctx
= ctx
->pctx
;
565 if (ctx
->digest
!= NULL
&& ctx
->digest
->set_ctx_params
!= NULL
)
566 return ctx
->digest
->set_ctx_params(ctx
->provctx
, params
);
569 && (pctx
->operation
== EVP_PKEY_OP_VERIFYCTX
570 || pctx
->operation
== EVP_PKEY_OP_SIGNCTX
)
571 && pctx
->op
.sig
.sigprovctx
!= NULL
572 && pctx
->op
.sig
.signature
->set_ctx_md_params
!= NULL
)
573 return pctx
->op
.sig
.signature
->set_ctx_md_params(pctx
->op
.sig
.sigprovctx
,
578 const OSSL_PARAM
*EVP_MD_settable_ctx_params(const EVP_MD
*md
)
580 if (md
!= NULL
&& md
->settable_ctx_params
!= NULL
)
581 return md
->settable_ctx_params();
585 const OSSL_PARAM
*EVP_MD_CTX_settable_params(EVP_MD_CTX
*ctx
)
590 && ctx
->digest
!= NULL
591 && ctx
->digest
->settable_ctx_params
!= NULL
)
592 return ctx
->digest
->settable_ctx_params();
596 && (pctx
->operation
== EVP_PKEY_OP_VERIFYCTX
597 || pctx
->operation
== EVP_PKEY_OP_SIGNCTX
)
598 && pctx
->op
.sig
.sigprovctx
!= NULL
599 && pctx
->op
.sig
.signature
->settable_ctx_md_params
!= NULL
)
600 return pctx
->op
.sig
.signature
->settable_ctx_md_params(
601 pctx
->op
.sig
.sigprovctx
);
606 int EVP_MD_CTX_get_params(EVP_MD_CTX
*ctx
, OSSL_PARAM params
[])
608 EVP_PKEY_CTX
*pctx
= ctx
->pctx
;
610 if (ctx
->digest
!= NULL
&& ctx
->digest
->get_params
!= NULL
)
611 return ctx
->digest
->get_ctx_params(ctx
->provctx
, params
);
614 && (pctx
->operation
== EVP_PKEY_OP_VERIFYCTX
615 || pctx
->operation
== EVP_PKEY_OP_SIGNCTX
)
616 && pctx
->op
.sig
.sigprovctx
!= NULL
617 && pctx
->op
.sig
.signature
->get_ctx_md_params
!= NULL
)
618 return pctx
->op
.sig
.signature
->get_ctx_md_params(pctx
->op
.sig
.sigprovctx
,
624 const OSSL_PARAM
*EVP_MD_gettable_ctx_params(const EVP_MD
*md
)
626 if (md
!= NULL
&& md
->gettable_ctx_params
!= NULL
)
627 return md
->gettable_ctx_params();
631 const OSSL_PARAM
*EVP_MD_CTX_gettable_params(EVP_MD_CTX
*ctx
)
636 && ctx
->digest
!= NULL
637 && ctx
->digest
->gettable_ctx_params
!= NULL
)
638 return ctx
->digest
->gettable_ctx_params();
642 && (pctx
->operation
== EVP_PKEY_OP_VERIFYCTX
643 || pctx
->operation
== EVP_PKEY_OP_SIGNCTX
)
644 && pctx
->op
.sig
.sigprovctx
!= NULL
645 && pctx
->op
.sig
.signature
->gettable_ctx_md_params
!= NULL
)
646 return pctx
->op
.sig
.signature
->gettable_ctx_md_params(
647 pctx
->op
.sig
.sigprovctx
);
652 /* TODO(3.0): Remove legacy code below - only used by engines & DigestSign */
653 int EVP_MD_CTX_ctrl(EVP_MD_CTX
*ctx
, int cmd
, int p1
, void *p2
)
655 int ret
= EVP_CTRL_RET_UNSUPPORTED
;
658 OSSL_PARAM params
[2] = { OSSL_PARAM_END
, OSSL_PARAM_END
};
661 ERR_raise(ERR_LIB_EVP
, ERR_R_PASSED_NULL_PARAMETER
);
665 if (ctx
->digest
!= NULL
&& ctx
->digest
->prov
== NULL
)
669 case EVP_MD_CTRL_XOF_LEN
:
671 params
[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN
, &sz
);
673 case EVP_MD_CTRL_MICALG
:
675 params
[0] = OSSL_PARAM_construct_utf8_string(OSSL_DIGEST_PARAM_MICALG
,
678 case EVP_CTRL_SSL3_MASTER_SECRET
:
679 params
[0] = OSSL_PARAM_construct_octet_string(OSSL_DIGEST_PARAM_SSL3_MS
,
687 ret
= EVP_MD_CTX_set_params(ctx
, params
);
689 ret
= EVP_MD_CTX_get_params(ctx
, params
);
693 /* TODO(3.0): Remove legacy code below */
695 if (ctx
->digest
->md_ctrl
== NULL
) {
696 ERR_raise(ERR_LIB_EVP
, EVP_R_CTRL_NOT_IMPLEMENTED
);
700 ret
= ctx
->digest
->md_ctrl(ctx
, cmd
, p1
, p2
);
707 EVP_MD
*evp_md_new(void)
709 EVP_MD
*md
= OPENSSL_zalloc(sizeof(*md
));
712 md
->lock
= CRYPTO_THREAD_lock_new();
713 if (md
->lock
== NULL
) {
723 * FIPS module note: since internal fetches will be entirely
724 * provider based, we know that none of its code depends on legacy
725 * NIDs or any functionality that use them.
728 /* TODO(3.x) get rid of the need for legacy NIDs */
729 static void set_legacy_nid(const char *name
, void *vlegacy_nid
)
732 int *legacy_nid
= vlegacy_nid
;
734 * We use lowest level function to get the associated method, because
735 * higher level functions such as EVP_get_digestbyname() have changed
736 * to look at providers too.
738 const void *legacy_method
= OBJ_NAME_get(name
, OBJ_NAME_TYPE_MD_METH
);
740 if (*legacy_nid
== -1) /* We found a clash already */
743 if (legacy_method
== NULL
)
745 nid
= EVP_MD_nid(legacy_method
);
746 if (*legacy_nid
!= NID_undef
&& *legacy_nid
!= nid
) {
754 static void *evp_md_from_dispatch(int name_id
,
755 const OSSL_DISPATCH
*fns
,
761 /* EVP_MD_fetch() will set the legacy NID if available */
762 if ((md
= evp_md_new()) == NULL
) {
763 EVPerr(0, ERR_R_MALLOC_FAILURE
);
768 /* TODO(3.x) get rid of the need for legacy NIDs */
769 md
->type
= NID_undef
;
770 evp_names_do_all(prov
, name_id
, set_legacy_nid
, &md
->type
);
771 if (md
->type
== -1) {
772 ERR_raise(ERR_LIB_EVP
, ERR_R_INTERNAL_ERROR
);
778 md
->name_id
= name_id
;
780 for (; fns
->function_id
!= 0; fns
++) {
781 switch (fns
->function_id
) {
782 case OSSL_FUNC_DIGEST_NEWCTX
:
783 if (md
->newctx
== NULL
) {
784 md
->newctx
= OSSL_get_OP_digest_newctx(fns
);
788 case OSSL_FUNC_DIGEST_INIT
:
789 if (md
->dinit
== NULL
) {
790 md
->dinit
= OSSL_get_OP_digest_init(fns
);
794 case OSSL_FUNC_DIGEST_UPDATE
:
795 if (md
->dupdate
== NULL
) {
796 md
->dupdate
= OSSL_get_OP_digest_update(fns
);
800 case OSSL_FUNC_DIGEST_FINAL
:
801 if (md
->dfinal
== NULL
) {
802 md
->dfinal
= OSSL_get_OP_digest_final(fns
);
806 case OSSL_FUNC_DIGEST_DIGEST
:
807 if (md
->digest
== NULL
)
808 md
->digest
= OSSL_get_OP_digest_digest(fns
);
809 /* We don't increment fnct for this as it is stand alone */
811 case OSSL_FUNC_DIGEST_FREECTX
:
812 if (md
->freectx
== NULL
) {
813 md
->freectx
= OSSL_get_OP_digest_freectx(fns
);
817 case OSSL_FUNC_DIGEST_DUPCTX
:
818 if (md
->dupctx
== NULL
)
819 md
->dupctx
= OSSL_get_OP_digest_dupctx(fns
);
821 case OSSL_FUNC_DIGEST_GET_PARAMS
:
822 if (md
->get_params
== NULL
)
823 md
->get_params
= OSSL_get_OP_digest_get_params(fns
);
825 case OSSL_FUNC_DIGEST_SET_CTX_PARAMS
:
826 if (md
->set_ctx_params
== NULL
)
827 md
->set_ctx_params
= OSSL_get_OP_digest_set_ctx_params(fns
);
829 case OSSL_FUNC_DIGEST_GET_CTX_PARAMS
:
830 if (md
->get_ctx_params
== NULL
)
831 md
->get_ctx_params
= OSSL_get_OP_digest_get_ctx_params(fns
);
833 case OSSL_FUNC_DIGEST_GETTABLE_PARAMS
:
834 if (md
->gettable_params
== NULL
)
835 md
->gettable_params
= OSSL_get_OP_digest_gettable_params(fns
);
837 case OSSL_FUNC_DIGEST_SETTABLE_CTX_PARAMS
:
838 if (md
->settable_ctx_params
== NULL
)
839 md
->settable_ctx_params
=
840 OSSL_get_OP_digest_settable_ctx_params(fns
);
842 case OSSL_FUNC_DIGEST_GETTABLE_CTX_PARAMS
:
843 if (md
->gettable_ctx_params
== NULL
)
844 md
->gettable_ctx_params
=
845 OSSL_get_OP_digest_gettable_ctx_params(fns
);
849 if ((fncnt
!= 0 && fncnt
!= 5)
850 || (fncnt
== 0 && md
->digest
== NULL
)) {
852 * In order to be a consistent set of functions we either need the
853 * whole set of init/update/final etc functions or none of them.
854 * The "digest" function can standalone. We at least need one way to
858 ERR_raise(ERR_LIB_EVP
, EVP_R_INVALID_PROVIDER_FUNCTIONS
);
863 ossl_provider_up_ref(prov
);
868 static int evp_md_up_ref(void *md
)
870 return EVP_MD_up_ref(md
);
873 static void evp_md_free(void *md
)
878 EVP_MD
*EVP_MD_fetch(OPENSSL_CTX
*ctx
, const char *algorithm
,
879 const char *properties
)
882 evp_generic_fetch(ctx
, OSSL_OP_DIGEST
, algorithm
, properties
,
883 evp_md_from_dispatch
, evp_md_up_ref
, evp_md_free
);
888 int EVP_MD_up_ref(EVP_MD
*md
)
892 CRYPTO_UP_REF(&md
->refcnt
, &ref
, md
->lock
);
896 void EVP_MD_free(EVP_MD
*md
)
903 CRYPTO_DOWN_REF(&md
->refcnt
, &i
, md
->lock
);
906 ossl_provider_free(md
->prov
);
907 CRYPTO_THREAD_lock_free(md
->lock
);
911 void EVP_MD_do_all_provided(OPENSSL_CTX
*libctx
,
912 void (*fn
)(EVP_MD
*mac
, void *arg
),
915 evp_generic_do_all(libctx
, OSSL_OP_DIGEST
,
916 (void (*)(void *, void *))fn
, arg
,
917 evp_md_from_dispatch
, evp_md_free
);