1 /*
2 * Copyright 1995-2025 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10 /* We need to use some engine deprecated APIs */
11 #define OPENSSL_SUPPRESS_DEPRECATED
12
13 #include <stdio.h>
14 #include <openssl/objects.h>
15 #include <openssl/evp.h>
16 #include <openssl/ec.h>
17 #ifndef FIPS_MODULE
18 # include <openssl/engine.h>
19 #endif
20 #include <openssl/params.h>
21 #include <openssl/core_names.h>
22 #include "internal/cryptlib.h"
23 #include "internal/nelem.h"
24 #include "internal/provider.h"
25 #include "internal/core.h"
26 #include "crypto/evp.h"
27 #include "evp_local.h"
28
cleanup_old_md_data(EVP_MD_CTX * ctx,int force)29 static void cleanup_old_md_data(EVP_MD_CTX *ctx, int force)
30 {
31 if (ctx->digest != NULL) {
32 if (ctx->digest->cleanup != NULL
33 && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED))
34 ctx->digest->cleanup(ctx);
35 if (ctx->md_data != NULL && ctx->digest->ctx_size > 0
36 && (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)
37 || force)) {
38 OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
39 ctx->md_data = NULL;
40 }
41 }
42 }
43
evp_md_ctx_clear_digest(EVP_MD_CTX * ctx,int force,int keep_fetched)44 void evp_md_ctx_clear_digest(EVP_MD_CTX *ctx, int force, int keep_fetched)
45 {
46 if (ctx->algctx != NULL) {
47 if (ctx->digest != NULL && ctx->digest->freectx != NULL)
48 ctx->digest->freectx(ctx->algctx);
49 ctx->algctx = NULL;
50 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
51 }
52
53 /* Code below to be removed when legacy support is dropped. */
54
55 /*
56 * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because
57 * sometimes only copies of the context are ever finalised.
58 */
59 cleanup_old_md_data(ctx, force);
60 if (force)
61 ctx->digest = NULL;
62
63 #if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
64 ENGINE_finish(ctx->engine);
65 ctx->engine = NULL;
66 #endif
67
68 /* Non legacy code, this has to be later than the ctx->digest cleaning */
69 if (!keep_fetched) {
70 EVP_MD_free(ctx->fetched_digest);
71 ctx->fetched_digest = NULL;
72 ctx->reqdigest = NULL;
73 }
74 }
75
evp_md_ctx_reset_ex(EVP_MD_CTX * ctx,int keep_fetched)76 static int evp_md_ctx_reset_ex(EVP_MD_CTX *ctx, int keep_fetched)
77 {
78 if (ctx == NULL)
79 return 1;
80
81 /*
82 * pctx should be freed by the user of EVP_MD_CTX
83 * if EVP_MD_CTX_FLAG_KEEP_PKEY_CTX is set
84 */
85 if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX)) {
86 EVP_PKEY_CTX_free(ctx->pctx);
87 ctx->pctx = NULL;
88 }
89
90 evp_md_ctx_clear_digest(ctx, 0, keep_fetched);
91 if (!keep_fetched)
92 OPENSSL_cleanse(ctx, sizeof(*ctx));
93
94 return 1;
95 }
96
97 /* This call frees resources associated with the context */
EVP_MD_CTX_reset(EVP_MD_CTX * ctx)98 int EVP_MD_CTX_reset(EVP_MD_CTX *ctx)
99 {
100 return evp_md_ctx_reset_ex(ctx, 0);
101 }
102
103 #ifndef FIPS_MODULE
evp_md_ctx_new_ex(EVP_PKEY * pkey,const ASN1_OCTET_STRING * id,OSSL_LIB_CTX * libctx,const char * propq)104 EVP_MD_CTX *evp_md_ctx_new_ex(EVP_PKEY *pkey, const ASN1_OCTET_STRING *id,
105 OSSL_LIB_CTX *libctx, const char *propq)
106 {
107 EVP_MD_CTX *ctx;
108 EVP_PKEY_CTX *pctx = NULL;
109
110 if ((ctx = EVP_MD_CTX_new()) == NULL
111 || (pctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq)) == NULL) {
112 ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
113 goto err;
114 }
115
116 if (id != NULL && EVP_PKEY_CTX_set1_id(pctx, id->data, id->length) <= 0)
117 goto err;
118
119 EVP_MD_CTX_set_pkey_ctx(ctx, pctx);
120 return ctx;
121
122 err:
123 EVP_PKEY_CTX_free(pctx);
124 EVP_MD_CTX_free(ctx);
125 return NULL;
126 }
127 #endif
128
EVP_MD_CTX_new(void)129 EVP_MD_CTX *EVP_MD_CTX_new(void)
130 {
131 return OPENSSL_zalloc(sizeof(EVP_MD_CTX));
132 }
133
EVP_MD_CTX_free(EVP_MD_CTX * ctx)134 void EVP_MD_CTX_free(EVP_MD_CTX *ctx)
135 {
136 if (ctx == NULL)
137 return;
138
139 EVP_MD_CTX_reset(ctx);
140 OPENSSL_free(ctx);
141 }
142
evp_md_ctx_free_algctx(EVP_MD_CTX * ctx)143 int evp_md_ctx_free_algctx(EVP_MD_CTX *ctx)
144 {
145 if (ctx->algctx != NULL) {
146 if (!ossl_assert(ctx->digest != NULL)) {
147 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
148 return 0;
149 }
150 if (ctx->digest->freectx != NULL)
151 ctx->digest->freectx(ctx->algctx);
152 ctx->algctx = NULL;
153 }
154 return 1;
155 }
156
evp_md_init_internal(EVP_MD_CTX * ctx,const EVP_MD * type,const OSSL_PARAM params[],ENGINE * impl)157 static int evp_md_init_internal(EVP_MD_CTX *ctx, const EVP_MD *type,
158 const OSSL_PARAM params[], ENGINE *impl)
159 {
160 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
161 ENGINE *tmpimpl = NULL;
162 #endif
163
164 #if !defined(FIPS_MODULE)
165 if (ctx->pctx != NULL
166 && EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx)
167 && ctx->pctx->op.sig.algctx != NULL) {
168 /*
169 * Prior to OpenSSL 3.0 calling EVP_DigestInit_ex() on an mdctx
170 * previously initialised with EVP_DigestSignInit() would retain
171 * information about the key, and re-initialise for another sign
172 * operation. So in that case we redirect to EVP_DigestSignInit()
173 */
174 if (ctx->pctx->operation == EVP_PKEY_OP_SIGNCTX)
175 return EVP_DigestSignInit(ctx, NULL, type, impl, NULL);
176 if (ctx->pctx->operation == EVP_PKEY_OP_VERIFYCTX)
177 return EVP_DigestVerifyInit(ctx, NULL, type, impl, NULL);
178 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
179 return 0;
180 }
181 #endif
182
183 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED
184 | EVP_MD_CTX_FLAG_FINALISED);
185
186 if (type != NULL) {
187 ctx->reqdigest = type;
188 } else {
189 if (ctx->digest == NULL) {
190 ERR_raise(ERR_LIB_EVP, EVP_R_NO_DIGEST_SET);
191 return 0;
192 }
193 type = ctx->digest;
194 }
195
196 /* Code below to be removed when legacy support is dropped. */
197 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
198 /*
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.
203 */
204 if (ctx->engine != NULL
205 && ctx->digest != NULL
206 && type->type == ctx->digest->type)
207 goto skip_to_init;
208
209 /*
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).
213 */
214 ENGINE_finish(ctx->engine);
215 ctx->engine = NULL;
216
217 if (impl == NULL)
218 tmpimpl = ENGINE_get_digest_engine(type->type);
219 #endif
220
221 /*
222 * If there are engines involved or EVP_MD_CTX_FLAG_NO_INIT is set then we
223 * should use legacy handling for now.
224 */
225 if (impl != NULL
226 #if !defined(OPENSSL_NO_ENGINE)
227 || ctx->engine != NULL
228 # if !defined(FIPS_MODULE)
229 || tmpimpl != NULL
230 # endif
231 #endif
232 || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0
233 || (type != NULL && type->origin == EVP_ORIG_METH)
234 || (type == NULL && ctx->digest != NULL
235 && ctx->digest->origin == EVP_ORIG_METH)) {
236 /* If we were using provided hash before, cleanup algctx */
237 if (!evp_md_ctx_free_algctx(ctx))
238 return 0;
239 if (ctx->digest == ctx->fetched_digest)
240 ctx->digest = NULL;
241 EVP_MD_free(ctx->fetched_digest);
242 ctx->fetched_digest = NULL;
243 goto legacy;
244 }
245
246 cleanup_old_md_data(ctx, 1);
247
248 /* Start of non-legacy code below */
249 if (ctx->digest == type) {
250 if (!ossl_assert(type->prov != NULL)) {
251 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
252 return 0;
253 }
254 } else {
255 if (!evp_md_ctx_free_algctx(ctx))
256 return 0;
257 }
258
259 if (type->prov == NULL) {
260 #ifdef FIPS_MODULE
261 /* We only do explicit fetches inside the FIPS module */
262 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
263 return 0;
264 #else
265 /* The NULL digest is a special case */
266 EVP_MD *provmd = EVP_MD_fetch(NULL,
267 type->type != NID_undef ? OBJ_nid2sn(type->type)
268 : "NULL", "");
269
270 if (provmd == NULL) {
271 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
272 return 0;
273 }
274 type = provmd;
275 EVP_MD_free(ctx->fetched_digest);
276 ctx->fetched_digest = provmd;
277 #endif
278 }
279
280 if (type->prov != NULL && ctx->fetched_digest != type) {
281 if (!EVP_MD_up_ref((EVP_MD *)type)) {
282 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
283 return 0;
284 }
285 EVP_MD_free(ctx->fetched_digest);
286 ctx->fetched_digest = (EVP_MD *)type;
287 }
288 ctx->digest = type;
289 if (ctx->algctx == NULL) {
290 ctx->algctx = ctx->digest->newctx(ossl_provider_ctx(type->prov));
291 if (ctx->algctx == NULL) {
292 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
293 return 0;
294 }
295 }
296
297 if (ctx->digest->dinit == NULL) {
298 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
299 return 0;
300 }
301
302 return ctx->digest->dinit(ctx->algctx, params);
303
304 /* Code below to be removed when legacy support is dropped. */
305 legacy:
306
307 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
308 if (type) {
309 if (impl != NULL) {
310 if (!ENGINE_init(impl)) {
311 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
312 return 0;
313 }
314 } else {
315 /* Ask if an ENGINE is reserved for this job */
316 impl = tmpimpl;
317 }
318 if (impl != NULL) {
319 /* There's an ENGINE for this job ... (apparently) */
320 const EVP_MD *d = ENGINE_get_digest(impl, type->type);
321
322 if (d == NULL) {
323 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
324 ENGINE_finish(impl);
325 return 0;
326 }
327 /* We'll use the ENGINE's private digest definition */
328 type = d;
329 /*
330 * Store the ENGINE functional reference so we know 'type' came
331 * from an ENGINE and we need to release it when done.
332 */
333 ctx->engine = impl;
334 } else
335 ctx->engine = NULL;
336 }
337 #endif
338 if (ctx->digest != type) {
339 cleanup_old_md_data(ctx, 1);
340
341 ctx->digest = type;
342 if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) {
343 ctx->update = type->update;
344 ctx->md_data = OPENSSL_zalloc(type->ctx_size);
345 if (ctx->md_data == NULL)
346 return 0;
347 }
348 }
349 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
350 skip_to_init:
351 #endif
352 #ifndef FIPS_MODULE
353 if (ctx->pctx != NULL
354 && (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx)
355 || ctx->pctx->op.sig.signature == NULL)) {
356 int r;
357 r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG,
358 EVP_PKEY_CTRL_DIGESTINIT, 0, ctx);
359 if (r <= 0 && (r != -2))
360 return 0;
361 }
362 #endif
363 if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
364 return 1;
365 return ctx->digest->init(ctx);
366 }
367
EVP_DigestInit_ex2(EVP_MD_CTX * ctx,const EVP_MD * type,const OSSL_PARAM params[])368 int EVP_DigestInit_ex2(EVP_MD_CTX *ctx, const EVP_MD *type,
369 const OSSL_PARAM params[])
370 {
371 return evp_md_init_internal(ctx, type, params, NULL);
372 }
373
EVP_DigestInit(EVP_MD_CTX * ctx,const EVP_MD * type)374 int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
375 {
376 EVP_MD_CTX_reset(ctx);
377 return evp_md_init_internal(ctx, type, NULL, NULL);
378 }
379
EVP_DigestInit_ex(EVP_MD_CTX * ctx,const EVP_MD * type,ENGINE * impl)380 int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
381 {
382 return evp_md_init_internal(ctx, type, NULL, impl);
383 }
384
EVP_DigestUpdate(EVP_MD_CTX * ctx,const void * data,size_t count)385 int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
386 {
387 if (count == 0)
388 return 1;
389
390 if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) {
391 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
392 return 0;
393 }
394
395 if (ctx->pctx != NULL
396 && EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx)
397 && ctx->pctx->op.sig.algctx != NULL) {
398 #ifndef FIPS_MODULE
399 /*
400 * Prior to OpenSSL 3.0 EVP_DigestSignUpdate() and
401 * EVP_DigestVerifyUpdate() were just macros for EVP_DigestUpdate().
402 * Some code calls EVP_DigestUpdate() directly even when initialised
403 * with EVP_DigestSignInit_ex() or
404 * EVP_DigestVerifyInit_ex(), so we detect that and redirect to
405 * the correct EVP_Digest*Update() function
406 */
407 if (ctx->pctx->operation == EVP_PKEY_OP_SIGNCTX)
408 return EVP_DigestSignUpdate(ctx, data, count);
409 if (ctx->pctx->operation == EVP_PKEY_OP_VERIFYCTX)
410 return EVP_DigestVerifyUpdate(ctx, data, count);
411 #endif
412 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
413 return 0;
414 }
415
416 if (ctx->digest == NULL
417 || ctx->digest->prov == NULL
418 || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0)
419 goto legacy;
420
421 if (ctx->digest->dupdate == NULL) {
422 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
423 return 0;
424 }
425 return ctx->digest->dupdate(ctx->algctx, data, count);
426
427 /* Code below to be removed when legacy support is dropped. */
428 legacy:
429 return ctx->update != NULL ? ctx->update(ctx, data, count) : 0;
430 }
431
432 /* The caller can assume that this removes any secret data from the context */
EVP_DigestFinal(EVP_MD_CTX * ctx,unsigned char * md,unsigned int * size)433 int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
434 {
435 int ret;
436 ret = EVP_DigestFinal_ex(ctx, md, size);
437 EVP_MD_CTX_reset(ctx);
438 return ret;
439 }
440
441 /* The caller can assume that this removes any secret data from the context */
EVP_DigestFinal_ex(EVP_MD_CTX * ctx,unsigned char * md,unsigned int * isize)442 int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *isize)
443 {
444 int ret, sz;
445 size_t size = 0;
446 size_t mdsize = 0;
447
448 if (ctx->digest == NULL)
449 return 0;
450
451 sz = EVP_MD_CTX_get_size(ctx);
452 if (sz < 0)
453 return 0;
454 mdsize = sz;
455 if (ctx->digest->prov == NULL)
456 goto legacy;
457
458 if (ctx->digest->dfinal == NULL) {
459 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
460 return 0;
461 }
462
463 if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) {
464 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
465 return 0;
466 }
467
468 ret = ctx->digest->dfinal(ctx->algctx, md, &size, mdsize);
469
470 ctx->flags |= EVP_MD_CTX_FLAG_FINALISED;
471
472 if (isize != NULL) {
473 if (size <= UINT_MAX) {
474 *isize = (unsigned int)size;
475 } else {
476 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
477 ret = 0;
478 }
479 }
480
481 return ret;
482
483 /* Code below to be removed when legacy support is dropped. */
484 legacy:
485 OPENSSL_assert(mdsize <= EVP_MAX_MD_SIZE);
486 ret = ctx->digest->final(ctx, md);
487 if (isize != NULL)
488 *isize = mdsize;
489 if (ctx->digest->cleanup) {
490 ctx->digest->cleanup(ctx);
491 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
492 }
493 OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
494 return ret;
495 }
496
497 /* This is a one shot operation */
EVP_DigestFinalXOF(EVP_MD_CTX * ctx,unsigned char * md,size_t size)498 int EVP_DigestFinalXOF(EVP_MD_CTX *ctx, unsigned char *md, size_t size)
499 {
500 int ret = 0;
501 OSSL_PARAM params[2];
502 size_t i = 0;
503
504 if (ctx->digest == NULL) {
505 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_NULL_ALGORITHM);
506 return 0;
507 }
508
509 if (ctx->digest->prov == NULL)
510 goto legacy;
511
512 if (ctx->digest->dfinal == NULL) {
513 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
514 return 0;
515 }
516
517 if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) {
518 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
519 return 0;
520 }
521
522 /*
523 * For backward compatibility we pass the XOFLEN via a param here so that
524 * older providers can use the supplied value. Ideally we should have just
525 * used the size passed into ctx->digest->dfinal().
526 */
527 params[i++] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &size);
528 params[i++] = OSSL_PARAM_construct_end();
529
530 if (EVP_MD_CTX_set_params(ctx, params) >= 0)
531 ret = ctx->digest->dfinal(ctx->algctx, md, &size, size);
532
533 ctx->flags |= EVP_MD_CTX_FLAG_FINALISED;
534
535 return ret;
536
537 legacy:
538 if (EVP_MD_xof(ctx->digest)
539 && size <= INT_MAX
540 && ctx->digest->md_ctrl(ctx, EVP_MD_CTRL_XOF_LEN, (int)size, NULL)) {
541 ret = ctx->digest->final(ctx, md);
542 if (ctx->digest->cleanup != NULL) {
543 ctx->digest->cleanup(ctx);
544 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
545 }
546 OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
547 } else {
548 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_XOF_OR_INVALID_LENGTH);
549 }
550
551 return ret;
552 }
553
554 /* EVP_DigestSqueeze() can be called multiple times */
EVP_DigestSqueeze(EVP_MD_CTX * ctx,unsigned char * md,size_t size)555 int EVP_DigestSqueeze(EVP_MD_CTX *ctx, unsigned char *md, size_t size)
556 {
557 if (ctx->digest == NULL) {
558 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_NULL_ALGORITHM);
559 return 0;
560 }
561
562 if (ctx->digest->prov == NULL) {
563 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
564 return 0;
565 }
566
567 if (ctx->digest->dsqueeze == NULL) {
568 ERR_raise(ERR_LIB_EVP, EVP_R_METHOD_NOT_SUPPORTED);
569 return 0;
570 }
571
572 return ctx->digest->dsqueeze(ctx->algctx, md, &size, size);
573 }
574
EVP_MD_CTX_dup(const EVP_MD_CTX * in)575 EVP_MD_CTX *EVP_MD_CTX_dup(const EVP_MD_CTX *in)
576 {
577 EVP_MD_CTX *out = EVP_MD_CTX_new();
578
579 if (out != NULL && !EVP_MD_CTX_copy_ex(out, in)) {
580 EVP_MD_CTX_free(out);
581 out = NULL;
582 }
583 return out;
584 }
585
EVP_MD_CTX_copy(EVP_MD_CTX * out,const EVP_MD_CTX * in)586 int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
587 {
588 EVP_MD_CTX_reset(out);
589 return EVP_MD_CTX_copy_ex(out, in);
590 }
591
EVP_MD_CTX_copy_ex(EVP_MD_CTX * out,const EVP_MD_CTX * in)592 int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
593 {
594 int digest_change = 0;
595 unsigned char *tmp_buf;
596
597 if (in == NULL) {
598 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
599 return 0;
600 }
601
602 if (in->digest == NULL) {
603 /* copying uninitialized digest context */
604 EVP_MD_CTX_reset(out);
605 if (out->fetched_digest != NULL)
606 EVP_MD_free(out->fetched_digest);
607 *out = *in;
608 goto clone_pkey;
609 }
610
611 if (in->digest->prov == NULL
612 || (in->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0)
613 goto legacy;
614
615 if (in->digest->dupctx == NULL) {
616 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
617 return 0;
618 }
619
620 if (out->digest == in->digest && in->digest->copyctx != NULL) {
621
622 in->digest->copyctx(out->algctx, in->algctx);
623
624 EVP_PKEY_CTX_free(out->pctx);
625 out->pctx = NULL;
626 cleanup_old_md_data(out, 0);
627
628 out->flags = in->flags;
629 out->update = in->update;
630 } else {
631 evp_md_ctx_reset_ex(out, 1);
632 digest_change = (out->fetched_digest != in->fetched_digest);
633
634 if (digest_change && in->fetched_digest != NULL
635 && !EVP_MD_up_ref(in->fetched_digest))
636 return 0;
637 if (digest_change && out->fetched_digest != NULL)
638 EVP_MD_free(out->fetched_digest);
639 *out = *in;
640 /* NULL out pointers in case of error */
641 out->pctx = NULL;
642 out->algctx = NULL;
643
644 if (in->algctx != NULL) {
645 out->algctx = in->digest->dupctx(in->algctx);
646 if (out->algctx == NULL) {
647 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
648 return 0;
649 }
650 }
651 }
652
653 clone_pkey:
654 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
655 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
656 #ifndef FIPS_MODULE
657 if (in->pctx != NULL) {
658 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
659 if (out->pctx == NULL) {
660 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
661 EVP_MD_CTX_reset(out);
662 return 0;
663 }
664 }
665 #endif
666
667 return 1;
668
669 /* Code below to be removed when legacy support is dropped. */
670 legacy:
671 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
672 /* Make sure it's safe to copy a digest context using an ENGINE */
673 if (in->engine && !ENGINE_init(in->engine)) {
674 ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB);
675 return 0;
676 }
677 #endif
678
679 if (out->digest == in->digest) {
680 tmp_buf = out->md_data;
681 EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE);
682 } else
683 tmp_buf = NULL;
684 EVP_MD_CTX_reset(out);
685 memcpy(out, in, sizeof(*out));
686
687 /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */
688 EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
689
690 /* Null these variables, since they are getting fixed up
691 * properly below. Anything else may cause a memleak and/or
692 * double free if any of the memory allocations below fail
693 */
694 out->md_data = NULL;
695 out->pctx = NULL;
696
697 if (in->md_data && out->digest->ctx_size) {
698 if (tmp_buf)
699 out->md_data = tmp_buf;
700 else {
701 out->md_data = OPENSSL_malloc(out->digest->ctx_size);
702 if (out->md_data == NULL)
703 return 0;
704 }
705 memcpy(out->md_data, in->md_data, out->digest->ctx_size);
706 }
707
708 out->update = in->update;
709
710 #ifndef FIPS_MODULE
711 if (in->pctx) {
712 out->pctx = EVP_PKEY_CTX_dup(in->pctx);
713 if (!out->pctx) {
714 EVP_MD_CTX_reset(out);
715 return 0;
716 }
717 }
718 #endif
719
720 if (out->digest->copy)
721 return out->digest->copy(out, in);
722
723 return 1;
724 }
725
EVP_Digest(const void * data,size_t count,unsigned char * md,unsigned int * size,const EVP_MD * type,ENGINE * impl)726 int EVP_Digest(const void *data, size_t count,
727 unsigned char *md, unsigned int *size, const EVP_MD *type,
728 ENGINE *impl)
729 {
730 EVP_MD_CTX *ctx = EVP_MD_CTX_new();
731 int ret;
732
733 if (ctx == NULL)
734 return 0;
735 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_ONESHOT);
736 ret = EVP_DigestInit_ex(ctx, type, impl)
737 && EVP_DigestUpdate(ctx, data, count)
738 && EVP_DigestFinal_ex(ctx, md, size);
739 EVP_MD_CTX_free(ctx);
740
741 return ret;
742 }
743
EVP_Q_digest(OSSL_LIB_CTX * libctx,const char * name,const char * propq,const void * data,size_t datalen,unsigned char * md,size_t * mdlen)744 int EVP_Q_digest(OSSL_LIB_CTX *libctx, const char *name, const char *propq,
745 const void *data, size_t datalen,
746 unsigned char *md, size_t *mdlen)
747 {
748 EVP_MD *digest = EVP_MD_fetch(libctx, name, propq);
749 unsigned int temp = 0;
750 int ret = 0;
751
752 if (digest != NULL) {
753 ret = EVP_Digest(data, datalen, md, &temp, digest, NULL);
754 EVP_MD_free(digest);
755 }
756 if (mdlen != NULL)
757 *mdlen = temp;
758 return ret;
759 }
760
EVP_MD_get_params(const EVP_MD * digest,OSSL_PARAM params[])761 int EVP_MD_get_params(const EVP_MD *digest, OSSL_PARAM params[])
762 {
763 if (digest != NULL && digest->get_params != NULL)
764 return digest->get_params(params);
765 return 0;
766 }
767
EVP_MD_gettable_params(const EVP_MD * digest)768 const OSSL_PARAM *EVP_MD_gettable_params(const EVP_MD *digest)
769 {
770 if (digest != NULL && digest->gettable_params != NULL)
771 return digest->gettable_params(
772 ossl_provider_ctx(EVP_MD_get0_provider(digest)));
773 return NULL;
774 }
775
EVP_MD_CTX_set_params(EVP_MD_CTX * ctx,const OSSL_PARAM params[])776 int EVP_MD_CTX_set_params(EVP_MD_CTX *ctx, const OSSL_PARAM params[])
777 {
778 EVP_PKEY_CTX *pctx = ctx->pctx;
779
780 /* If we have a pctx then we should try that first */
781 if (pctx != NULL
782 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
783 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
784 && pctx->op.sig.algctx != NULL
785 && pctx->op.sig.signature->set_ctx_md_params != NULL)
786 return pctx->op.sig.signature->set_ctx_md_params(pctx->op.sig.algctx,
787 params);
788
789 if (ctx->digest != NULL && ctx->digest->set_ctx_params != NULL)
790 return ctx->digest->set_ctx_params(ctx->algctx, params);
791
792 return 0;
793 }
794
EVP_MD_settable_ctx_params(const EVP_MD * md)795 const OSSL_PARAM *EVP_MD_settable_ctx_params(const EVP_MD *md)
796 {
797 void *provctx;
798
799 if (md != NULL && md->settable_ctx_params != NULL) {
800 provctx = ossl_provider_ctx(EVP_MD_get0_provider(md));
801 return md->settable_ctx_params(NULL, provctx);
802 }
803 return NULL;
804 }
805
EVP_MD_CTX_settable_params(EVP_MD_CTX * ctx)806 const OSSL_PARAM *EVP_MD_CTX_settable_params(EVP_MD_CTX *ctx)
807 {
808 EVP_PKEY_CTX *pctx;
809 void *alg;
810
811 if (ctx == NULL)
812 return NULL;
813
814 /* If we have a pctx then we should try that first */
815 pctx = ctx->pctx;
816 if (pctx != NULL
817 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
818 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
819 && pctx->op.sig.algctx != NULL
820 && pctx->op.sig.signature->settable_ctx_md_params != NULL)
821 return pctx->op.sig.signature->settable_ctx_md_params(
822 pctx->op.sig.algctx);
823
824 if (ctx->digest != NULL && ctx->digest->settable_ctx_params != NULL) {
825 alg = ossl_provider_ctx(EVP_MD_get0_provider(ctx->digest));
826 return ctx->digest->settable_ctx_params(ctx->algctx, alg);
827 }
828
829 return NULL;
830 }
831
EVP_MD_CTX_get_params(EVP_MD_CTX * ctx,OSSL_PARAM params[])832 int EVP_MD_CTX_get_params(EVP_MD_CTX *ctx, OSSL_PARAM params[])
833 {
834 EVP_PKEY_CTX *pctx = ctx->pctx;
835
836 /* If we have a pctx then we should try that first */
837 if (pctx != NULL
838 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
839 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
840 && pctx->op.sig.algctx != NULL
841 && pctx->op.sig.signature->get_ctx_md_params != NULL)
842 return pctx->op.sig.signature->get_ctx_md_params(pctx->op.sig.algctx,
843 params);
844
845 if (ctx->digest != NULL && ctx->digest->get_ctx_params != NULL)
846 return ctx->digest->get_ctx_params(ctx->algctx, params);
847
848 return 0;
849 }
850
EVP_MD_gettable_ctx_params(const EVP_MD * md)851 const OSSL_PARAM *EVP_MD_gettable_ctx_params(const EVP_MD *md)
852 {
853 void *provctx;
854
855 if (md != NULL && md->gettable_ctx_params != NULL) {
856 provctx = ossl_provider_ctx(EVP_MD_get0_provider(md));
857 return md->gettable_ctx_params(NULL, provctx);
858 }
859 return NULL;
860 }
861
EVP_MD_CTX_gettable_params(EVP_MD_CTX * ctx)862 const OSSL_PARAM *EVP_MD_CTX_gettable_params(EVP_MD_CTX *ctx)
863 {
864 EVP_PKEY_CTX *pctx;
865 void *provctx;
866
867 if (ctx == NULL)
868 return NULL;
869
870 /* If we have a pctx then we should try that first */
871 pctx = ctx->pctx;
872 if (pctx != NULL
873 && (pctx->operation == EVP_PKEY_OP_VERIFYCTX
874 || pctx->operation == EVP_PKEY_OP_SIGNCTX)
875 && pctx->op.sig.algctx != NULL
876 && pctx->op.sig.signature->gettable_ctx_md_params != NULL)
877 return pctx->op.sig.signature->gettable_ctx_md_params(
878 pctx->op.sig.algctx);
879
880 if (ctx->digest != NULL && ctx->digest->gettable_ctx_params != NULL) {
881 provctx = ossl_provider_ctx(EVP_MD_get0_provider(ctx->digest));
882 return ctx->digest->gettable_ctx_params(ctx->algctx, provctx);
883 }
884 return NULL;
885 }
886
EVP_MD_CTX_ctrl(EVP_MD_CTX * ctx,int cmd,int p1,void * p2)887 int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2)
888 {
889 int ret = EVP_CTRL_RET_UNSUPPORTED;
890 int set_params = 1;
891 size_t sz;
892 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
893
894 if (ctx == NULL) {
895 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
896 return 0;
897 }
898
899 if (ctx->digest != NULL && ctx->digest->prov == NULL)
900 goto legacy;
901
902 switch (cmd) {
903 case EVP_MD_CTRL_XOF_LEN:
904 sz = (size_t)p1;
905 params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &sz);
906 break;
907 case EVP_MD_CTRL_MICALG:
908 set_params = 0;
909 params[0] = OSSL_PARAM_construct_utf8_string(OSSL_DIGEST_PARAM_MICALG,
910 p2, p1 ? p1 : 9999);
911 break;
912 case EVP_CTRL_SSL3_MASTER_SECRET:
913 params[0] = OSSL_PARAM_construct_octet_string(OSSL_DIGEST_PARAM_SSL3_MS,
914 p2, p1);
915 break;
916 default:
917 goto conclude;
918 }
919
920 if (set_params)
921 ret = EVP_MD_CTX_set_params(ctx, params);
922 else
923 ret = EVP_MD_CTX_get_params(ctx, params);
924 goto conclude;
925
926
927 /* Code below to be removed when legacy support is dropped. */
928 legacy:
929 if (ctx->digest->md_ctrl == NULL) {
930 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
931 return 0;
932 }
933
934 ret = ctx->digest->md_ctrl(ctx, cmd, p1, p2);
935 conclude:
936 if (ret <= 0)
937 return 0;
938 return ret;
939 }
940
evp_md_new(void)941 EVP_MD *evp_md_new(void)
942 {
943 EVP_MD *md = OPENSSL_zalloc(sizeof(*md));
944
945 if (md != NULL && !CRYPTO_NEW_REF(&md->refcnt, 1)) {
946 OPENSSL_free(md);
947 return NULL;
948 }
949 return md;
950 }
951
952 /*
953 * FIPS module note: since internal fetches will be entirely
954 * provider based, we know that none of its code depends on legacy
955 * NIDs or any functionality that use them.
956 */
957 #ifndef FIPS_MODULE
set_legacy_nid(const char * name,void * vlegacy_nid)958 static void set_legacy_nid(const char *name, void *vlegacy_nid)
959 {
960 int nid;
961 int *legacy_nid = vlegacy_nid;
962 /*
963 * We use lowest level function to get the associated method, because
964 * higher level functions such as EVP_get_digestbyname() have changed
965 * to look at providers too.
966 */
967 const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_MD_METH);
968
969 if (*legacy_nid == -1) /* We found a clash already */
970 return;
971
972 if (legacy_method == NULL)
973 return;
974 nid = EVP_MD_nid(legacy_method);
975 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
976 *legacy_nid = -1;
977 return;
978 }
979 *legacy_nid = nid;
980 }
981 #endif
982
evp_md_cache_constants(EVP_MD * md)983 static int evp_md_cache_constants(EVP_MD *md)
984 {
985 int ok, xof = 0, algid_absent = 0;
986 size_t blksz = 0;
987 size_t mdsize = 0;
988 OSSL_PARAM params[5];
989
990 /*
991 * Note that these parameters are 'constants' that are only set up
992 * during the EVP_MD_fetch(). For this reason the XOF functions set the
993 * md_size to 0, since the output size is unknown.
994 */
995 params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_BLOCK_SIZE, &blksz);
996 params[1] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_SIZE, &mdsize);
997 params[2] = OSSL_PARAM_construct_int(OSSL_DIGEST_PARAM_XOF, &xof);
998 params[3] = OSSL_PARAM_construct_int(OSSL_DIGEST_PARAM_ALGID_ABSENT,
999 &algid_absent);
1000 params[4] = OSSL_PARAM_construct_end();
1001 ok = evp_do_md_getparams(md, params) > 0;
1002 if (mdsize > INT_MAX || blksz > INT_MAX)
1003 ok = 0;
1004 if (ok) {
1005 md->block_size = (int)blksz;
1006 md->md_size = (int)mdsize;
1007 if (xof)
1008 md->flags |= EVP_MD_FLAG_XOF;
1009 if (algid_absent)
1010 md->flags |= EVP_MD_FLAG_DIGALGID_ABSENT;
1011 }
1012 return ok;
1013 }
1014
evp_md_from_algorithm(int name_id,const OSSL_ALGORITHM * algodef,OSSL_PROVIDER * prov)1015 static void *evp_md_from_algorithm(int name_id,
1016 const OSSL_ALGORITHM *algodef,
1017 OSSL_PROVIDER *prov)
1018 {
1019 const OSSL_DISPATCH *fns = algodef->implementation;
1020 EVP_MD *md = NULL;
1021 int fncnt = 0;
1022
1023 /* EVP_MD_fetch() will set the legacy NID if available */
1024 if ((md = evp_md_new()) == NULL) {
1025 ERR_raise(ERR_LIB_EVP, ERR_R_EVP_LIB);
1026 return NULL;
1027 }
1028
1029 #ifndef FIPS_MODULE
1030 md->type = NID_undef;
1031 if (!evp_names_do_all(prov, name_id, set_legacy_nid, &md->type)
1032 || md->type == -1) {
1033 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1034 goto err;
1035 }
1036 #endif
1037
1038 md->name_id = name_id;
1039 if ((md->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL)
1040 goto err;
1041
1042 md->description = algodef->algorithm_description;
1043
1044 for (; fns->function_id != 0; fns++) {
1045 switch (fns->function_id) {
1046 case OSSL_FUNC_DIGEST_NEWCTX:
1047 if (md->newctx == NULL) {
1048 md->newctx = OSSL_FUNC_digest_newctx(fns);
1049 fncnt++;
1050 }
1051 break;
1052 case OSSL_FUNC_DIGEST_INIT:
1053 if (md->dinit == NULL) {
1054 md->dinit = OSSL_FUNC_digest_init(fns);
1055 fncnt++;
1056 }
1057 break;
1058 case OSSL_FUNC_DIGEST_UPDATE:
1059 if (md->dupdate == NULL) {
1060 md->dupdate = OSSL_FUNC_digest_update(fns);
1061 fncnt++;
1062 }
1063 break;
1064 case OSSL_FUNC_DIGEST_FINAL:
1065 if (md->dfinal == NULL) {
1066 md->dfinal = OSSL_FUNC_digest_final(fns);
1067 fncnt++;
1068 }
1069 break;
1070 case OSSL_FUNC_DIGEST_SQUEEZE:
1071 if (md->dsqueeze == NULL) {
1072 md->dsqueeze = OSSL_FUNC_digest_squeeze(fns);
1073 fncnt++;
1074 }
1075 break;
1076 case OSSL_FUNC_DIGEST_DIGEST:
1077 if (md->digest == NULL)
1078 md->digest = OSSL_FUNC_digest_digest(fns);
1079 /* We don't increment fnct for this as it is stand alone */
1080 break;
1081 case OSSL_FUNC_DIGEST_FREECTX:
1082 if (md->freectx == NULL) {
1083 md->freectx = OSSL_FUNC_digest_freectx(fns);
1084 fncnt++;
1085 }
1086 break;
1087 case OSSL_FUNC_DIGEST_DUPCTX:
1088 if (md->dupctx == NULL)
1089 md->dupctx = OSSL_FUNC_digest_dupctx(fns);
1090 break;
1091 case OSSL_FUNC_DIGEST_GET_PARAMS:
1092 if (md->get_params == NULL)
1093 md->get_params = OSSL_FUNC_digest_get_params(fns);
1094 break;
1095 case OSSL_FUNC_DIGEST_SET_CTX_PARAMS:
1096 if (md->set_ctx_params == NULL)
1097 md->set_ctx_params = OSSL_FUNC_digest_set_ctx_params(fns);
1098 break;
1099 case OSSL_FUNC_DIGEST_GET_CTX_PARAMS:
1100 if (md->get_ctx_params == NULL)
1101 md->get_ctx_params = OSSL_FUNC_digest_get_ctx_params(fns);
1102 break;
1103 case OSSL_FUNC_DIGEST_GETTABLE_PARAMS:
1104 if (md->gettable_params == NULL)
1105 md->gettable_params = OSSL_FUNC_digest_gettable_params(fns);
1106 break;
1107 case OSSL_FUNC_DIGEST_SETTABLE_CTX_PARAMS:
1108 if (md->settable_ctx_params == NULL)
1109 md->settable_ctx_params =
1110 OSSL_FUNC_digest_settable_ctx_params(fns);
1111 break;
1112 case OSSL_FUNC_DIGEST_GETTABLE_CTX_PARAMS:
1113 if (md->gettable_ctx_params == NULL)
1114 md->gettable_ctx_params =
1115 OSSL_FUNC_digest_gettable_ctx_params(fns);
1116 break;
1117 case OSSL_FUNC_DIGEST_COPYCTX:
1118 if (md->copyctx == NULL)
1119 md->copyctx =
1120 OSSL_FUNC_digest_copyctx(fns);
1121 break;
1122 }
1123 }
1124 if ((fncnt != 0 && fncnt != 5 && fncnt != 6)
1125 || (fncnt == 0 && md->digest == NULL)) {
1126 /*
1127 * In order to be a consistent set of functions we either need the
1128 * whole set of init/update/final etc functions or none of them.
1129 * The "digest" function can standalone. We at least need one way to
1130 * generate digests.
1131 */
1132 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
1133 goto err;
1134 }
1135 if (prov != NULL && !ossl_provider_up_ref(prov))
1136 goto err;
1137
1138 md->prov = prov;
1139
1140 if (!evp_md_cache_constants(md)) {
1141 ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED);
1142 goto err;
1143 }
1144
1145 return md;
1146
1147 err:
1148 EVP_MD_free(md);
1149 return NULL;
1150 }
1151
evp_md_up_ref(void * md)1152 static int evp_md_up_ref(void *md)
1153 {
1154 return EVP_MD_up_ref(md);
1155 }
1156
evp_md_free(void * md)1157 static void evp_md_free(void *md)
1158 {
1159 EVP_MD_free(md);
1160 }
1161
EVP_MD_fetch(OSSL_LIB_CTX * ctx,const char * algorithm,const char * properties)1162 EVP_MD *EVP_MD_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
1163 const char *properties)
1164 {
1165 EVP_MD *md =
1166 evp_generic_fetch(ctx, OSSL_OP_DIGEST, algorithm, properties,
1167 evp_md_from_algorithm, evp_md_up_ref, evp_md_free);
1168
1169 return md;
1170 }
1171
EVP_MD_up_ref(EVP_MD * md)1172 int EVP_MD_up_ref(EVP_MD *md)
1173 {
1174 int ref = 0;
1175
1176 if (md->origin == EVP_ORIG_DYNAMIC)
1177 CRYPTO_UP_REF(&md->refcnt, &ref);
1178 return 1;
1179 }
1180
EVP_MD_free(EVP_MD * md)1181 void EVP_MD_free(EVP_MD *md)
1182 {
1183 int i;
1184
1185 if (md == NULL || md->origin != EVP_ORIG_DYNAMIC)
1186 return;
1187
1188 CRYPTO_DOWN_REF(&md->refcnt, &i);
1189 if (i > 0)
1190 return;
1191 evp_md_free_int(md);
1192 }
1193
EVP_MD_do_all_provided(OSSL_LIB_CTX * libctx,void (* fn)(EVP_MD * mac,void * arg),void * arg)1194 void EVP_MD_do_all_provided(OSSL_LIB_CTX *libctx,
1195 void (*fn)(EVP_MD *mac, void *arg),
1196 void *arg)
1197 {
1198 evp_generic_do_all(libctx, OSSL_OP_DIGEST,
1199 (void (*)(void *, void *))fn, arg,
1200 evp_md_from_algorithm, evp_md_up_ref, evp_md_free);
1201 }
1202
evp_digest_fetch_from_prov(OSSL_PROVIDER * prov,const char * algorithm,const char * properties)1203 EVP_MD *evp_digest_fetch_from_prov(OSSL_PROVIDER *prov,
1204 const char *algorithm,
1205 const char *properties)
1206 {
1207 return evp_generic_fetch_from_prov(prov, OSSL_OP_DIGEST,
1208 algorithm, properties,
1209 evp_md_from_algorithm,
1210 evp_md_up_ref,
1211 evp_md_free);
1212 }
1213
1214 typedef struct {
1215 int md_nid;
1216 int hmac_nid;
1217 } ossl_hmacmd_pair;
1218
1219 static const ossl_hmacmd_pair ossl_hmacmd_pairs[] = {
1220 {NID_sha1, NID_hmacWithSHA1},
1221 {NID_md5, NID_hmacWithMD5},
1222 {NID_sha224, NID_hmacWithSHA224},
1223 {NID_sha256, NID_hmacWithSHA256},
1224 {NID_sha384, NID_hmacWithSHA384},
1225 {NID_sha512, NID_hmacWithSHA512},
1226 {NID_id_GostR3411_94, NID_id_HMACGostR3411_94},
1227 {NID_id_GostR3411_2012_256, NID_id_tc26_hmac_gost_3411_2012_256},
1228 {NID_id_GostR3411_2012_512, NID_id_tc26_hmac_gost_3411_2012_512},
1229 {NID_sha3_224, NID_hmac_sha3_224},
1230 {NID_sha3_256, NID_hmac_sha3_256},
1231 {NID_sha3_384, NID_hmac_sha3_384},
1232 {NID_sha3_512, NID_hmac_sha3_512},
1233 {NID_sha512_224, NID_hmacWithSHA512_224},
1234 {NID_sha512_256, NID_hmacWithSHA512_256}
1235 };
1236
ossl_hmac2mdnid(int hmac_nid)1237 int ossl_hmac2mdnid(int hmac_nid)
1238 {
1239 int md_nid = NID_undef;
1240 size_t i;
1241
1242 for (i = 0; i < OSSL_NELEM(ossl_hmacmd_pairs); i++) {
1243 if (ossl_hmacmd_pairs[i].hmac_nid == hmac_nid) {
1244 md_nid = ossl_hmacmd_pairs[i].md_nid;
1245 break;
1246 }
1247 }
1248
1249 return md_nid;
1250 }
1251
ossl_md2hmacnid(int md_nid)1252 int ossl_md2hmacnid(int md_nid)
1253 {
1254 int hmac_nid = NID_undef;
1255 size_t i;
1256
1257 for (i = 0; i < OSSL_NELEM(ossl_hmacmd_pairs); i++) {
1258 if (ossl_hmacmd_pairs[i].md_nid == md_nid) {
1259 hmac_nid = ossl_hmacmd_pairs[i].hmac_nid;
1260 break;
1261 }
1262 }
1263
1264 return hmac_nid;
1265 }
1266