2 * Copyright 2019-2021 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
11 * RSA low level APIs are deprecated for public use, but still ok for
14 #include "internal/deprecated.h"
16 #include "e_os.h" /* strcasecmp */
18 #include <openssl/crypto.h>
19 #include <openssl/core_dispatch.h>
20 #include <openssl/core_names.h>
21 #include <openssl/err.h>
22 #include <openssl/rsa.h>
23 #include <openssl/params.h>
24 #include <openssl/evp.h>
25 #include <openssl/proverr.h>
26 #include "internal/cryptlib.h"
27 #include "internal/nelem.h"
28 #include "internal/sizes.h"
29 #include "crypto/rsa.h"
30 #include "prov/providercommon.h"
31 #include "prov/implementations.h"
32 #include "prov/provider_ctx.h"
33 #include "prov/der_rsa.h"
34 #include "prov/securitycheck.h"
36 #define RSA_DEFAULT_DIGEST_NAME OSSL_DIGEST_NAME_SHA1
38 static OSSL_FUNC_signature_newctx_fn rsa_newctx;
39 static OSSL_FUNC_signature_sign_init_fn rsa_sign_init;
40 static OSSL_FUNC_signature_verify_init_fn rsa_verify_init;
41 static OSSL_FUNC_signature_verify_recover_init_fn rsa_verify_recover_init;
42 static OSSL_FUNC_signature_sign_fn rsa_sign;
43 static OSSL_FUNC_signature_verify_fn rsa_verify;
44 static OSSL_FUNC_signature_verify_recover_fn rsa_verify_recover;
45 static OSSL_FUNC_signature_digest_sign_init_fn rsa_digest_sign_init;
46 static OSSL_FUNC_signature_digest_sign_update_fn rsa_digest_signverify_update;
47 static OSSL_FUNC_signature_digest_sign_final_fn rsa_digest_sign_final;
48 static OSSL_FUNC_signature_digest_verify_init_fn rsa_digest_verify_init;
49 static OSSL_FUNC_signature_digest_verify_update_fn rsa_digest_signverify_update;
50 static OSSL_FUNC_signature_digest_verify_final_fn rsa_digest_verify_final;
51 static OSSL_FUNC_signature_freectx_fn rsa_freectx;
52 static OSSL_FUNC_signature_dupctx_fn rsa_dupctx;
53 static OSSL_FUNC_signature_get_ctx_params_fn rsa_get_ctx_params;
54 static OSSL_FUNC_signature_gettable_ctx_params_fn rsa_gettable_ctx_params;
55 static OSSL_FUNC_signature_set_ctx_params_fn rsa_set_ctx_params;
56 static OSSL_FUNC_signature_settable_ctx_params_fn rsa_settable_ctx_params;
57 static OSSL_FUNC_signature_get_ctx_md_params_fn rsa_get_ctx_md_params;
58 static OSSL_FUNC_signature_gettable_ctx_md_params_fn rsa_gettable_ctx_md_params;
59 static OSSL_FUNC_signature_set_ctx_md_params_fn rsa_set_ctx_md_params;
60 static OSSL_FUNC_signature_settable_ctx_md_params_fn rsa_settable_ctx_md_params;
62 static OSSL_ITEM padding_item[] = {
63 { RSA_PKCS1_PADDING, OSSL_PKEY_RSA_PAD_MODE_PKCSV15 },
64 { RSA_NO_PADDING, OSSL_PKEY_RSA_PAD_MODE_NONE },
65 { RSA_X931_PADDING, OSSL_PKEY_RSA_PAD_MODE_X931 },
66 { RSA_PKCS1_PSS_PADDING, OSSL_PKEY_RSA_PAD_MODE_PSS },
71 * What's passed as an actual key is defined by the KEYMGMT interface.
72 * We happen to know that our KEYMGMT simply passes RSA structures, so
73 * we use that here too.
83 * Flag to determine if the hash function can be changed (1) or not (0)
84 * Because it's dangerous to change during a DigestSign or DigestVerify
85 * operation, this flag is cleared by their Init function, and set again
86 * by their Final function.
88 unsigned int flag_allow_md : 1;
89 unsigned int mgf1_md_set : 1;
95 char mdname[OSSL_MAX_NAME_SIZE]; /* Purely informational */
97 /* RSA padding mode */
99 /* message digest for MGF1 */
102 char mgf1_mdname[OSSL_MAX_NAME_SIZE]; /* Purely informational */
103 /* PSS salt length */
105 /* Minimum salt length or -1 if no PSS parameter restriction */
113 /* True if PSS parameters are restricted */
114 #define rsa_pss_restricted(prsactx) (prsactx->min_saltlen != -1)
116 static size_t rsa_get_md_size(const PROV_RSA_CTX *prsactx)
118 if (prsactx->md != NULL)
119 return EVP_MD_size(prsactx->md);
123 static int rsa_check_padding(const PROV_RSA_CTX *prsactx,
124 const char *mdname, const char *mgf1_mdname,
127 switch(prsactx->pad_mode) {
129 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_PADDING_MODE);
131 case RSA_X931_PADDING:
132 if (RSA_X931_hash_id(mdnid) == -1) {
133 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_X931_DIGEST);
137 case RSA_PKCS1_PSS_PADDING:
138 if (rsa_pss_restricted(prsactx))
139 if ((mdname != NULL && !EVP_MD_is_a(prsactx->md, mdname))
140 || (mgf1_mdname != NULL
141 && !EVP_MD_is_a(prsactx->mgf1_md, mgf1_mdname))) {
142 ERR_raise(ERR_LIB_PROV, PROV_R_DIGEST_NOT_ALLOWED);
153 static int rsa_check_parameters(PROV_RSA_CTX *prsactx, int min_saltlen)
155 if (prsactx->pad_mode == RSA_PKCS1_PSS_PADDING) {
158 /* See if minimum salt length exceeds maximum possible */
159 max_saltlen = RSA_size(prsactx->rsa) - EVP_MD_size(prsactx->md);
160 if ((RSA_bits(prsactx->rsa) & 0x7) == 1)
162 if (min_saltlen < 0 || min_saltlen > max_saltlen) {
163 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_SALT_LENGTH);
166 prsactx->min_saltlen = min_saltlen;
171 static void *rsa_newctx(void *provctx, const char *propq)
173 PROV_RSA_CTX *prsactx = NULL;
174 char *propq_copy = NULL;
176 if (!ossl_prov_is_running())
179 if ((prsactx = OPENSSL_zalloc(sizeof(PROV_RSA_CTX))) == NULL
181 && (propq_copy = OPENSSL_strdup(propq)) == NULL)) {
182 OPENSSL_free(prsactx);
183 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
187 prsactx->libctx = PROV_LIBCTX_OF(provctx);
188 prsactx->flag_allow_md = 1;
189 prsactx->propq = propq_copy;
193 static int rsa_pss_compute_saltlen(PROV_RSA_CTX *ctx)
195 int saltlen = ctx->saltlen;
197 if (saltlen == RSA_PSS_SALTLEN_DIGEST) {
198 saltlen = EVP_MD_size(ctx->md);
199 } else if (saltlen == RSA_PSS_SALTLEN_AUTO || saltlen == RSA_PSS_SALTLEN_MAX) {
200 saltlen = RSA_size(ctx->rsa) - EVP_MD_size(ctx->md) - 2;
201 if ((RSA_bits(ctx->rsa) & 0x7) == 1)
205 ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
207 } else if (saltlen < ctx->min_saltlen) {
208 ERR_raise_data(ERR_LIB_PROV, PROV_R_PSS_SALTLEN_TOO_SMALL,
209 "minimum salt length: %d, actual salt length: %d",
210 ctx->min_saltlen, saltlen);
216 static unsigned char *rsa_generate_signature_aid(PROV_RSA_CTX *ctx,
217 unsigned char *aid_buf,
222 unsigned char *aid = NULL;
224 RSA_PSS_PARAMS_30 pss_params;
227 if (!WPACKET_init_der(&pkt, aid_buf, buf_len)) {
228 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
232 switch(ctx->pad_mode) {
233 case RSA_PKCS1_PADDING:
234 ret = ossl_DER_w_algorithmIdentifier_MDWithRSAEncryption(&pkt, -1,
239 } else if (ret == 0) {
240 ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
243 ERR_raise_data(ERR_LIB_PROV, ERR_R_UNSUPPORTED,
244 "Algorithm ID generation - md NID: %d",
247 case RSA_PKCS1_PSS_PADDING:
248 saltlen = rsa_pss_compute_saltlen(ctx);
251 if (!ossl_rsa_pss_params_30_set_defaults(&pss_params)
252 || !ossl_rsa_pss_params_30_set_hashalg(&pss_params, ctx->mdnid)
253 || !ossl_rsa_pss_params_30_set_maskgenhashalg(&pss_params,
255 || !ossl_rsa_pss_params_30_set_saltlen(&pss_params, saltlen)
256 || !ossl_DER_w_algorithmIdentifier_RSA_PSS(&pkt, -1,
257 RSA_FLAG_TYPE_RSASSAPSS,
259 ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
264 ERR_raise_data(ERR_LIB_PROV, ERR_R_UNSUPPORTED,
265 "Algorithm ID generation - pad mode: %d",
269 if (WPACKET_finish(&pkt)) {
270 WPACKET_get_total_written(&pkt, aid_len);
271 aid = WPACKET_get_curr(&pkt);
274 WPACKET_cleanup(&pkt);
278 static int rsa_setup_md(PROV_RSA_CTX *ctx, const char *mdname,
282 mdprops = ctx->propq;
284 if (mdname != NULL) {
285 EVP_MD *md = EVP_MD_fetch(ctx->libctx, mdname, mdprops);
286 int sha1_allowed = (ctx->operation != EVP_PKEY_OP_SIGN);
287 int md_nid = ossl_digest_rsa_sign_get_md_nid(ctx->libctx, md,
289 size_t mdname_len = strlen(mdname);
292 || md_nid == NID_undef
293 || !rsa_check_padding(ctx, mdname, NULL, md_nid)
294 || mdname_len >= sizeof(ctx->mdname)) {
296 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST,
297 "%s could not be fetched", mdname);
298 if (md_nid == NID_undef)
299 ERR_raise_data(ERR_LIB_PROV, PROV_R_DIGEST_NOT_ALLOWED,
300 "digest=%s", mdname);
301 if (mdname_len >= sizeof(ctx->mdname))
302 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST,
303 "%s exceeds name buffer length", mdname);
308 if (!ctx->mgf1_md_set) {
309 if (!EVP_MD_up_ref(md)) {
313 EVP_MD_free(ctx->mgf1_md);
315 ctx->mgf1_mdnid = md_nid;
316 OPENSSL_strlcpy(ctx->mgf1_mdname, mdname, sizeof(ctx->mgf1_mdname));
319 EVP_MD_CTX_free(ctx->mdctx);
320 EVP_MD_free(ctx->md);
325 OPENSSL_strlcpy(ctx->mdname, mdname, sizeof(ctx->mdname));
331 static int rsa_setup_mgf1_md(PROV_RSA_CTX *ctx, const char *mdname,
339 mdprops = ctx->propq;
341 if ((md = EVP_MD_fetch(ctx->libctx, mdname, mdprops)) == NULL) {
342 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST,
343 "%s could not be fetched", mdname);
346 /* The default for mgf1 is SHA1 - so allow SHA1 */
347 if ((mdnid = ossl_digest_rsa_sign_get_md_nid(ctx->libctx, md, 1)) == NID_undef
348 || !rsa_check_padding(ctx, NULL, mdname, mdnid)) {
349 if (mdnid == NID_undef)
350 ERR_raise_data(ERR_LIB_PROV, PROV_R_DIGEST_NOT_ALLOWED,
351 "digest=%s", mdname);
355 len = OPENSSL_strlcpy(ctx->mgf1_mdname, mdname, sizeof(ctx->mgf1_mdname));
356 if (len >= sizeof(ctx->mgf1_mdname)) {
357 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST,
358 "%s exceeds name buffer length", mdname);
363 EVP_MD_free(ctx->mgf1_md);
365 ctx->mgf1_mdnid = mdnid;
366 ctx->mgf1_md_set = 1;
370 static int rsa_signverify_init(void *vprsactx, void *vrsa,
371 const OSSL_PARAM params[], int operation)
373 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
375 if (!ossl_prov_is_running())
378 if (prsactx == NULL || vrsa == NULL)
381 if (!ossl_rsa_check_key(prsactx->libctx, vrsa, operation))
384 if (!RSA_up_ref(vrsa))
386 RSA_free(prsactx->rsa);
388 prsactx->operation = operation;
390 if (!rsa_set_ctx_params(prsactx, params))
393 /* Maximum for sign, auto for verify */
394 prsactx->saltlen = RSA_PSS_SALTLEN_AUTO;
395 prsactx->min_saltlen = -1;
397 switch (RSA_test_flags(prsactx->rsa, RSA_FLAG_TYPE_MASK)) {
398 case RSA_FLAG_TYPE_RSA:
399 prsactx->pad_mode = RSA_PKCS1_PADDING;
401 case RSA_FLAG_TYPE_RSASSAPSS:
402 prsactx->pad_mode = RSA_PKCS1_PSS_PADDING;
405 const RSA_PSS_PARAMS_30 *pss =
406 ossl_rsa_get0_pss_params_30(prsactx->rsa);
408 if (!ossl_rsa_pss_params_30_is_unrestricted(pss)) {
409 int md_nid = ossl_rsa_pss_params_30_hashalg(pss);
410 int mgf1md_nid = ossl_rsa_pss_params_30_maskgenhashalg(pss);
411 int min_saltlen = ossl_rsa_pss_params_30_saltlen(pss);
412 const char *mdname, *mgf1mdname;
415 mdname = ossl_rsa_oaeppss_nid2name(md_nid);
416 mgf1mdname = ossl_rsa_oaeppss_nid2name(mgf1md_nid);
418 if (mdname == NULL) {
419 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST,
420 "PSS restrictions lack hash algorithm");
423 if (mgf1mdname == NULL) {
424 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST,
425 "PSS restrictions lack MGF1 hash algorithm");
429 len = OPENSSL_strlcpy(prsactx->mdname, mdname,
430 sizeof(prsactx->mdname));
431 if (len >= sizeof(prsactx->mdname)) {
432 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST,
433 "hash algorithm name too long");
436 len = OPENSSL_strlcpy(prsactx->mgf1_mdname, mgf1mdname,
437 sizeof(prsactx->mgf1_mdname));
438 if (len >= sizeof(prsactx->mgf1_mdname)) {
439 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST,
440 "MGF1 hash algorithm name too long");
443 prsactx->saltlen = min_saltlen;
445 /* call rsa_setup_mgf1_md before rsa_setup_md to avoid duplication */
446 return rsa_setup_mgf1_md(prsactx, mgf1mdname, prsactx->propq)
447 && rsa_setup_md(prsactx, mdname, prsactx->propq)
448 && rsa_check_parameters(prsactx, min_saltlen);
454 ERR_raise(ERR_LIB_RSA, PROV_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
461 static int setup_tbuf(PROV_RSA_CTX *ctx)
463 if (ctx->tbuf != NULL)
465 if ((ctx->tbuf = OPENSSL_malloc(RSA_size(ctx->rsa))) == NULL) {
466 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
472 static void clean_tbuf(PROV_RSA_CTX *ctx)
474 if (ctx->tbuf != NULL)
475 OPENSSL_cleanse(ctx->tbuf, RSA_size(ctx->rsa));
478 static void free_tbuf(PROV_RSA_CTX *ctx)
481 OPENSSL_free(ctx->tbuf);
485 static int rsa_sign_init(void *vprsactx, void *vrsa, const OSSL_PARAM params[])
487 if (!ossl_prov_is_running())
489 return rsa_signverify_init(vprsactx, vrsa, params, EVP_PKEY_OP_SIGN);
492 static int rsa_sign(void *vprsactx, unsigned char *sig, size_t *siglen,
493 size_t sigsize, const unsigned char *tbs, size_t tbslen)
495 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
497 size_t rsasize = RSA_size(prsactx->rsa);
498 size_t mdsize = rsa_get_md_size(prsactx);
500 if (!ossl_prov_is_running())
508 if (sigsize < rsasize) {
509 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_SIGNATURE_SIZE,
510 "is %zu, should be at least %zu", sigsize, rsasize);
515 if (tbslen != mdsize) {
516 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DIGEST_LENGTH);
521 if (EVP_MD_is_a(prsactx->md, OSSL_DIGEST_NAME_MDC2)) {
524 if (prsactx->pad_mode != RSA_PKCS1_PADDING) {
525 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_PADDING_MODE,
526 "only PKCS#1 padding supported with MDC2");
529 ret = RSA_sign_ASN1_OCTET_STRING(0, tbs, tbslen, sig, &sltmp,
533 ERR_raise(ERR_LIB_PROV, ERR_R_RSA_LIB);
540 switch (prsactx->pad_mode) {
541 case RSA_X931_PADDING:
542 if ((size_t)RSA_size(prsactx->rsa) < tbslen + 1) {
543 ERR_raise_data(ERR_LIB_PROV, PROV_R_KEY_SIZE_TOO_SMALL,
544 "RSA key size = %d, expected minimum = %d",
545 RSA_size(prsactx->rsa), tbslen + 1);
548 if (!setup_tbuf(prsactx)) {
549 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
552 memcpy(prsactx->tbuf, tbs, tbslen);
553 prsactx->tbuf[tbslen] = RSA_X931_hash_id(prsactx->mdnid);
554 ret = RSA_private_encrypt(tbslen + 1, prsactx->tbuf,
555 sig, prsactx->rsa, RSA_X931_PADDING);
559 case RSA_PKCS1_PADDING:
563 ret = RSA_sign(prsactx->mdnid, tbs, tbslen, sig, &sltmp,
566 ERR_raise(ERR_LIB_PROV, ERR_R_RSA_LIB);
573 case RSA_PKCS1_PSS_PADDING:
574 /* Check PSS restrictions */
575 if (rsa_pss_restricted(prsactx)) {
576 switch (prsactx->saltlen) {
577 case RSA_PSS_SALTLEN_DIGEST:
578 if (prsactx->min_saltlen > EVP_MD_size(prsactx->md)) {
579 ERR_raise_data(ERR_LIB_PROV,
580 PROV_R_PSS_SALTLEN_TOO_SMALL,
581 "minimum salt length set to %d, "
582 "but the digest only gives %d",
583 prsactx->min_saltlen,
584 EVP_MD_size(prsactx->md));
589 if (prsactx->saltlen >= 0
590 && prsactx->saltlen < prsactx->min_saltlen) {
591 ERR_raise_data(ERR_LIB_PROV,
592 PROV_R_PSS_SALTLEN_TOO_SMALL,
593 "minimum salt length set to %d, but the"
594 "actual salt length is only set to %d",
595 prsactx->min_saltlen,
602 if (!setup_tbuf(prsactx))
604 if (!RSA_padding_add_PKCS1_PSS_mgf1(prsactx->rsa,
606 prsactx->md, prsactx->mgf1_md,
608 ERR_raise(ERR_LIB_PROV, ERR_R_RSA_LIB);
611 ret = RSA_private_encrypt(RSA_size(prsactx->rsa), prsactx->tbuf,
612 sig, prsactx->rsa, RSA_NO_PADDING);
617 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_PADDING_MODE,
618 "Only X.931, PKCS#1 v1.5 or PSS padding allowed");
622 ret = RSA_private_encrypt(tbslen, tbs, sig, prsactx->rsa,
630 ERR_raise(ERR_LIB_PROV, ERR_R_RSA_LIB);
638 static int rsa_verify_recover_init(void *vprsactx, void *vrsa,
639 const OSSL_PARAM params[])
641 if (!ossl_prov_is_running())
643 return rsa_signverify_init(vprsactx, vrsa, params,
644 EVP_PKEY_OP_VERIFYRECOVER);
647 static int rsa_verify_recover(void *vprsactx,
651 const unsigned char *sig,
654 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
657 if (!ossl_prov_is_running())
661 *routlen = RSA_size(prsactx->rsa);
665 if (prsactx->md != NULL) {
666 switch (prsactx->pad_mode) {
667 case RSA_X931_PADDING:
668 if (!setup_tbuf(prsactx))
670 ret = RSA_public_decrypt(siglen, sig, prsactx->tbuf, prsactx->rsa,
673 ERR_raise(ERR_LIB_PROV, ERR_R_RSA_LIB);
677 if (prsactx->tbuf[ret] != RSA_X931_hash_id(prsactx->mdnid)) {
678 ERR_raise(ERR_LIB_PROV, PROV_R_ALGORITHM_MISMATCH);
681 if (ret != EVP_MD_size(prsactx->md)) {
682 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST_LENGTH,
683 "Should be %d, but got %d",
684 EVP_MD_size(prsactx->md), ret);
689 if (rout != prsactx->tbuf) {
690 if (routsize < (size_t)ret) {
691 ERR_raise_data(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL,
692 "buffer size is %d, should be %d",
696 memcpy(rout, prsactx->tbuf, ret);
700 case RSA_PKCS1_PADDING:
704 ret = ossl_rsa_verify(prsactx->mdnid, NULL, 0, rout, &sltmp,
705 sig, siglen, prsactx->rsa);
707 ERR_raise(ERR_LIB_PROV, ERR_R_RSA_LIB);
715 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_PADDING_MODE,
716 "Only X.931 or PKCS#1 v1.5 padding allowed");
720 ret = RSA_public_decrypt(siglen, sig, rout, prsactx->rsa,
723 ERR_raise(ERR_LIB_PROV, ERR_R_RSA_LIB);
731 static int rsa_verify_init(void *vprsactx, void *vrsa,
732 const OSSL_PARAM params[])
734 if (!ossl_prov_is_running())
736 return rsa_signverify_init(vprsactx, vrsa, params, EVP_PKEY_OP_VERIFY);
739 static int rsa_verify(void *vprsactx, const unsigned char *sig, size_t siglen,
740 const unsigned char *tbs, size_t tbslen)
742 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
745 if (!ossl_prov_is_running())
747 if (prsactx->md != NULL) {
748 switch (prsactx->pad_mode) {
749 case RSA_PKCS1_PADDING:
750 if (!RSA_verify(prsactx->mdnid, tbs, tbslen, sig, siglen,
752 ERR_raise(ERR_LIB_PROV, ERR_R_RSA_LIB);
756 case RSA_X931_PADDING:
757 if (!setup_tbuf(prsactx))
759 if (rsa_verify_recover(prsactx, prsactx->tbuf, &rslen, 0,
763 case RSA_PKCS1_PSS_PADDING:
769 * We need to check this for the RSA_verify_PKCS1_PSS_mgf1()
772 mdsize = rsa_get_md_size(prsactx);
773 if (tbslen != mdsize) {
774 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST_LENGTH,
775 "Should be %d, but got %d",
780 if (!setup_tbuf(prsactx))
782 ret = RSA_public_decrypt(siglen, sig, prsactx->tbuf,
783 prsactx->rsa, RSA_NO_PADDING);
785 ERR_raise(ERR_LIB_PROV, ERR_R_RSA_LIB);
788 ret = RSA_verify_PKCS1_PSS_mgf1(prsactx->rsa, tbs,
789 prsactx->md, prsactx->mgf1_md,
793 ERR_raise(ERR_LIB_PROV, ERR_R_RSA_LIB);
799 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_PADDING_MODE,
800 "Only X.931, PKCS#1 v1.5 or PSS padding allowed");
804 if (!setup_tbuf(prsactx))
806 rslen = RSA_public_decrypt(siglen, sig, prsactx->tbuf, prsactx->rsa,
809 ERR_raise(ERR_LIB_PROV, ERR_R_RSA_LIB);
814 if ((rslen != tbslen) || memcmp(tbs, prsactx->tbuf, rslen))
820 static int rsa_digest_signverify_init(void *vprsactx, const char *mdname,
821 void *vrsa, const OSSL_PARAM params[],
824 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
826 if (!ossl_prov_is_running())
830 prsactx->flag_allow_md = 0;
831 if (!rsa_signverify_init(vprsactx, vrsa, params, operation))
834 /* was rsa_setup_md already called in rsa_signverify_init()? */
835 && (mdname[0] == '\0' || strcasecmp(prsactx->mdname, mdname) != 0)
836 && !rsa_setup_md(prsactx, mdname, prsactx->propq))
839 prsactx->mdctx = EVP_MD_CTX_new();
840 if (prsactx->mdctx == NULL) {
841 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
845 if (!EVP_DigestInit_ex2(prsactx->mdctx, prsactx->md, params))
851 EVP_MD_CTX_free(prsactx->mdctx);
852 EVP_MD_free(prsactx->md);
853 prsactx->mdctx = NULL;
858 static int rsa_digest_signverify_update(void *vprsactx,
859 const unsigned char *data,
862 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
864 if (prsactx == NULL || prsactx->mdctx == NULL)
867 return EVP_DigestUpdate(prsactx->mdctx, data, datalen);
870 static int rsa_digest_sign_init(void *vprsactx, const char *mdname,
871 void *vrsa, const OSSL_PARAM params[])
873 if (!ossl_prov_is_running())
875 return rsa_digest_signverify_init(vprsactx, mdname, vrsa,
876 params, EVP_PKEY_OP_SIGN);
879 static int rsa_digest_sign_final(void *vprsactx, unsigned char *sig,
880 size_t *siglen, size_t sigsize)
882 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
883 unsigned char digest[EVP_MAX_MD_SIZE];
884 unsigned int dlen = 0;
886 if (!ossl_prov_is_running() || prsactx == NULL)
888 prsactx->flag_allow_md = 1;
889 if (prsactx->mdctx == NULL)
892 * If sig is NULL then we're just finding out the sig size. Other fields
893 * are ignored. Defer to rsa_sign.
897 * The digests used here are all known (see rsa_get_md_nid()), so they
898 * should not exceed the internal buffer size of EVP_MAX_MD_SIZE.
900 if (!EVP_DigestFinal_ex(prsactx->mdctx, digest, &dlen))
904 return rsa_sign(vprsactx, sig, siglen, sigsize, digest, (size_t)dlen);
907 static int rsa_digest_verify_init(void *vprsactx, const char *mdname,
908 void *vrsa, const OSSL_PARAM params[])
910 if (!ossl_prov_is_running())
912 return rsa_digest_signverify_init(vprsactx, mdname, vrsa,
913 params, EVP_PKEY_OP_VERIFY);
916 int rsa_digest_verify_final(void *vprsactx, const unsigned char *sig,
919 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
920 unsigned char digest[EVP_MAX_MD_SIZE];
921 unsigned int dlen = 0;
923 if (!ossl_prov_is_running())
928 prsactx->flag_allow_md = 1;
929 if (prsactx->mdctx == NULL)
933 * The digests used here are all known (see rsa_get_md_nid()), so they
934 * should not exceed the internal buffer size of EVP_MAX_MD_SIZE.
936 if (!EVP_DigestFinal_ex(prsactx->mdctx, digest, &dlen))
939 return rsa_verify(vprsactx, sig, siglen, digest, (size_t)dlen);
942 static void rsa_freectx(void *vprsactx)
944 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
949 EVP_MD_CTX_free(prsactx->mdctx);
950 EVP_MD_free(prsactx->md);
951 EVP_MD_free(prsactx->mgf1_md);
952 OPENSSL_free(prsactx->propq);
954 RSA_free(prsactx->rsa);
956 OPENSSL_clear_free(prsactx, sizeof(*prsactx));
959 static void *rsa_dupctx(void *vprsactx)
961 PROV_RSA_CTX *srcctx = (PROV_RSA_CTX *)vprsactx;
962 PROV_RSA_CTX *dstctx;
964 if (!ossl_prov_is_running())
967 dstctx = OPENSSL_zalloc(sizeof(*srcctx));
968 if (dstctx == NULL) {
969 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
976 dstctx->mdctx = NULL;
978 dstctx->propq = NULL;
980 if (srcctx->rsa != NULL && !RSA_up_ref(srcctx->rsa))
982 dstctx->rsa = srcctx->rsa;
984 if (srcctx->md != NULL && !EVP_MD_up_ref(srcctx->md))
986 dstctx->md = srcctx->md;
988 if (srcctx->mgf1_md != NULL && !EVP_MD_up_ref(srcctx->mgf1_md))
990 dstctx->mgf1_md = srcctx->mgf1_md;
992 if (srcctx->mdctx != NULL) {
993 dstctx->mdctx = EVP_MD_CTX_new();
994 if (dstctx->mdctx == NULL
995 || !EVP_MD_CTX_copy_ex(dstctx->mdctx, srcctx->mdctx))
999 if (srcctx->propq != NULL) {
1000 dstctx->propq = OPENSSL_strdup(srcctx->propq);
1001 if (dstctx->propq == NULL)
1007 rsa_freectx(dstctx);
1011 static int rsa_get_ctx_params(void *vprsactx, OSSL_PARAM *params)
1013 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
1016 if (prsactx == NULL)
1019 p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_ALGORITHM_ID);
1021 /* The Algorithm Identifier of the combined signature algorithm */
1022 unsigned char aid_buf[128];
1026 aid = rsa_generate_signature_aid(prsactx, aid_buf,
1027 sizeof(aid_buf), &aid_len);
1028 if (aid == NULL || !OSSL_PARAM_set_octet_string(p, aid, aid_len))
1032 p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_PAD_MODE);
1034 switch (p->data_type) {
1035 case OSSL_PARAM_INTEGER:
1036 if (!OSSL_PARAM_set_int(p, prsactx->pad_mode))
1039 case OSSL_PARAM_UTF8_STRING:
1042 const char *word = NULL;
1044 for (i = 0; padding_item[i].id != 0; i++) {
1045 if (prsactx->pad_mode == (int)padding_item[i].id) {
1046 word = padding_item[i].ptr;
1052 if (!OSSL_PARAM_set_utf8_string(p, word))
1055 ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
1063 p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_DIGEST);
1064 if (p != NULL && !OSSL_PARAM_set_utf8_string(p, prsactx->mdname))
1067 p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_MGF1_DIGEST);
1068 if (p != NULL && !OSSL_PARAM_set_utf8_string(p, prsactx->mgf1_mdname))
1071 p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_PSS_SALTLEN);
1073 if (p->data_type == OSSL_PARAM_INTEGER) {
1074 if (!OSSL_PARAM_set_int(p, prsactx->saltlen))
1076 } else if (p->data_type == OSSL_PARAM_UTF8_STRING) {
1077 const char *value = NULL;
1079 switch (prsactx->saltlen) {
1080 case RSA_PSS_SALTLEN_DIGEST:
1081 value = OSSL_PKEY_RSA_PSS_SALT_LEN_DIGEST;
1083 case RSA_PSS_SALTLEN_MAX:
1084 value = OSSL_PKEY_RSA_PSS_SALT_LEN_MAX;
1086 case RSA_PSS_SALTLEN_AUTO:
1087 value = OSSL_PKEY_RSA_PSS_SALT_LEN_AUTO;
1091 int len = BIO_snprintf(p->data, p->data_size, "%d",
1096 p->return_size = len;
1101 && !OSSL_PARAM_set_utf8_string(p, value))
1109 static const OSSL_PARAM known_gettable_ctx_params[] = {
1110 OSSL_PARAM_octet_string(OSSL_SIGNATURE_PARAM_ALGORITHM_ID, NULL, 0),
1111 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PAD_MODE, NULL, 0),
1112 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST, NULL, 0),
1113 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_MGF1_DIGEST, NULL, 0),
1114 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PSS_SALTLEN, NULL, 0),
1118 static const OSSL_PARAM *rsa_gettable_ctx_params(ossl_unused void *vprsactx,
1119 ossl_unused void *provctx)
1121 return known_gettable_ctx_params;
1124 static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
1126 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
1127 const OSSL_PARAM *p;
1130 char mdname[OSSL_MAX_NAME_SIZE] = "", *pmdname = NULL;
1131 char mdprops[OSSL_MAX_PROPQUERY_SIZE] = "", *pmdprops = NULL;
1132 char mgf1mdname[OSSL_MAX_NAME_SIZE] = "", *pmgf1mdname = NULL;
1133 char mgf1mdprops[OSSL_MAX_PROPQUERY_SIZE] = "", *pmgf1mdprops = NULL;
1135 if (prsactx == NULL)
1140 pad_mode = prsactx->pad_mode;
1141 saltlen = prsactx->saltlen;
1143 p = OSSL_PARAM_locate_const(params, OSSL_SIGNATURE_PARAM_DIGEST);
1144 /* Not allowed during certain operations */
1145 if (p != NULL && !prsactx->flag_allow_md)
1148 const OSSL_PARAM *propsp =
1149 OSSL_PARAM_locate_const(params,
1150 OSSL_SIGNATURE_PARAM_PROPERTIES);
1153 if (!OSSL_PARAM_get_utf8_string(p, &pmdname, sizeof(mdname)))
1156 if (propsp != NULL) {
1158 if (!OSSL_PARAM_get_utf8_string(propsp,
1159 &pmdprops, sizeof(mdprops)))
1164 p = OSSL_PARAM_locate_const(params, OSSL_SIGNATURE_PARAM_PAD_MODE);
1166 const char *err_extra_text = NULL;
1168 switch (p->data_type) {
1169 case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
1170 if (!OSSL_PARAM_get_int(p, &pad_mode))
1173 case OSSL_PARAM_UTF8_STRING:
1177 if (p->data == NULL)
1180 for (i = 0; padding_item[i].id != 0; i++) {
1181 if (strcmp(p->data, padding_item[i].ptr) == 0) {
1182 pad_mode = padding_item[i].id;
1193 case RSA_PKCS1_OAEP_PADDING:
1195 * OAEP padding is for asymmetric cipher only so is not compatible
1196 * with signature use.
1198 err_extra_text = "OAEP padding not allowed for signing / verifying";
1200 case RSA_PKCS1_PSS_PADDING:
1201 if ((prsactx->operation
1202 & (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY)) == 0) {
1204 "PSS padding only allowed for sign and verify operations";
1208 case RSA_PKCS1_PADDING:
1209 err_extra_text = "PKCS#1 padding not allowed with RSA-PSS";
1211 case RSA_NO_PADDING:
1212 err_extra_text = "No padding not allowed with RSA-PSS";
1214 case RSA_X931_PADDING:
1215 err_extra_text = "X.931 padding not allowed with RSA-PSS";
1217 if (RSA_test_flags(prsactx->rsa,
1218 RSA_FLAG_TYPE_MASK) == RSA_FLAG_TYPE_RSA)
1223 if (err_extra_text == NULL)
1224 ERR_raise(ERR_LIB_PROV,
1225 PROV_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
1227 ERR_raise_data(ERR_LIB_PROV,
1228 PROV_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE,
1234 p = OSSL_PARAM_locate_const(params, OSSL_SIGNATURE_PARAM_PSS_SALTLEN);
1236 if (pad_mode != RSA_PKCS1_PSS_PADDING) {
1237 ERR_raise_data(ERR_LIB_PROV, PROV_R_NOT_SUPPORTED,
1238 "PSS saltlen can only be specified if "
1239 "PSS padding has been specified first");
1243 switch (p->data_type) {
1244 case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
1245 if (!OSSL_PARAM_get_int(p, &saltlen))
1248 case OSSL_PARAM_UTF8_STRING:
1249 if (strcmp(p->data, OSSL_PKEY_RSA_PSS_SALT_LEN_DIGEST) == 0)
1250 saltlen = RSA_PSS_SALTLEN_DIGEST;
1251 else if (strcmp(p->data, OSSL_PKEY_RSA_PSS_SALT_LEN_MAX) == 0)
1252 saltlen = RSA_PSS_SALTLEN_MAX;
1253 else if (strcmp(p->data, OSSL_PKEY_RSA_PSS_SALT_LEN_AUTO) == 0)
1254 saltlen = RSA_PSS_SALTLEN_AUTO;
1256 saltlen = atoi(p->data);
1263 * RSA_PSS_SALTLEN_MAX seems curiously named in this check.
1264 * Contrary to what it's name suggests, it's the currently
1265 * lowest saltlen number possible.
1267 if (saltlen < RSA_PSS_SALTLEN_MAX) {
1268 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_SALT_LENGTH);
1272 if (rsa_pss_restricted(prsactx)) {
1274 case RSA_PSS_SALTLEN_AUTO:
1275 if (prsactx->operation == EVP_PKEY_OP_VERIFY) {
1276 ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_SALT_LENGTH,
1277 "Cannot use autodetected salt length");
1281 case RSA_PSS_SALTLEN_DIGEST:
1282 if (prsactx->min_saltlen > EVP_MD_size(prsactx->md)) {
1283 ERR_raise_data(ERR_LIB_PROV,
1284 PROV_R_PSS_SALTLEN_TOO_SMALL,
1285 "Should be more than %d, but would be "
1286 "set to match digest size (%d)",
1287 prsactx->min_saltlen,
1288 EVP_MD_size(prsactx->md));
1293 if (saltlen >= 0 && saltlen < prsactx->min_saltlen) {
1294 ERR_raise_data(ERR_LIB_PROV,
1295 PROV_R_PSS_SALTLEN_TOO_SMALL,
1296 "Should be more than %d, "
1297 "but would be set to %d",
1298 prsactx->min_saltlen, saltlen);
1305 p = OSSL_PARAM_locate_const(params, OSSL_SIGNATURE_PARAM_MGF1_DIGEST);
1307 const OSSL_PARAM *propsp =
1308 OSSL_PARAM_locate_const(params,
1309 OSSL_SIGNATURE_PARAM_MGF1_PROPERTIES);
1311 pmgf1mdname = mgf1mdname;
1312 if (!OSSL_PARAM_get_utf8_string(p, &pmgf1mdname, sizeof(mgf1mdname)))
1315 if (propsp != NULL) {
1316 pmgf1mdprops = mgf1mdprops;
1317 if (!OSSL_PARAM_get_utf8_string(propsp,
1318 &pmgf1mdprops, sizeof(mgf1mdprops)))
1322 if (pad_mode != RSA_PKCS1_PSS_PADDING) {
1323 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_MGF1_MD);
1328 prsactx->saltlen = saltlen;
1329 prsactx->pad_mode = pad_mode;
1331 if (prsactx->md == NULL && pmdname == NULL
1332 && pad_mode == RSA_PKCS1_PSS_PADDING)
1333 pmdname = RSA_DEFAULT_DIGEST_NAME;
1335 if (pmgf1mdname != NULL
1336 && !rsa_setup_mgf1_md(prsactx, pmgf1mdname, pmgf1mdprops))
1339 if (pmdname != NULL) {
1340 if (!rsa_setup_md(prsactx, pmdname, pmdprops))
1343 if (!rsa_check_padding(prsactx, NULL, NULL, prsactx->mdnid))
1349 static const OSSL_PARAM settable_ctx_params[] = {
1350 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST, NULL, 0),
1351 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PROPERTIES, NULL, 0),
1352 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PAD_MODE, NULL, 0),
1353 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_MGF1_DIGEST, NULL, 0),
1354 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_MGF1_PROPERTIES, NULL, 0),
1355 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PSS_SALTLEN, NULL, 0),
1359 static const OSSL_PARAM settable_ctx_params_no_digest[] = {
1360 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PAD_MODE, NULL, 0),
1361 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_MGF1_DIGEST, NULL, 0),
1362 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_MGF1_PROPERTIES, NULL, 0),
1363 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PSS_SALTLEN, NULL, 0),
1367 static const OSSL_PARAM *rsa_settable_ctx_params(void *vprsactx,
1368 ossl_unused void *provctx)
1370 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
1372 if (prsactx != NULL && !prsactx->flag_allow_md)
1373 return settable_ctx_params_no_digest;
1374 return settable_ctx_params;
1377 static int rsa_get_ctx_md_params(void *vprsactx, OSSL_PARAM *params)
1379 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
1381 if (prsactx->mdctx == NULL)
1384 return EVP_MD_CTX_get_params(prsactx->mdctx, params);
1387 static const OSSL_PARAM *rsa_gettable_ctx_md_params(void *vprsactx)
1389 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
1391 if (prsactx->md == NULL)
1394 return EVP_MD_gettable_ctx_params(prsactx->md);
1397 static int rsa_set_ctx_md_params(void *vprsactx, const OSSL_PARAM params[])
1399 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
1401 if (prsactx->mdctx == NULL)
1404 return EVP_MD_CTX_set_params(prsactx->mdctx, params);
1407 static const OSSL_PARAM *rsa_settable_ctx_md_params(void *vprsactx)
1409 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
1411 if (prsactx->md == NULL)
1414 return EVP_MD_settable_ctx_params(prsactx->md);
1417 const OSSL_DISPATCH ossl_rsa_signature_functions[] = {
1418 { OSSL_FUNC_SIGNATURE_NEWCTX, (void (*)(void))rsa_newctx },
1419 { OSSL_FUNC_SIGNATURE_SIGN_INIT, (void (*)(void))rsa_sign_init },
1420 { OSSL_FUNC_SIGNATURE_SIGN, (void (*)(void))rsa_sign },
1421 { OSSL_FUNC_SIGNATURE_VERIFY_INIT, (void (*)(void))rsa_verify_init },
1422 { OSSL_FUNC_SIGNATURE_VERIFY, (void (*)(void))rsa_verify },
1423 { OSSL_FUNC_SIGNATURE_VERIFY_RECOVER_INIT,
1424 (void (*)(void))rsa_verify_recover_init },
1425 { OSSL_FUNC_SIGNATURE_VERIFY_RECOVER,
1426 (void (*)(void))rsa_verify_recover },
1427 { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT,
1428 (void (*)(void))rsa_digest_sign_init },
1429 { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_UPDATE,
1430 (void (*)(void))rsa_digest_signverify_update },
1431 { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_FINAL,
1432 (void (*)(void))rsa_digest_sign_final },
1433 { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT,
1434 (void (*)(void))rsa_digest_verify_init },
1435 { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_UPDATE,
1436 (void (*)(void))rsa_digest_signverify_update },
1437 { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_FINAL,
1438 (void (*)(void))rsa_digest_verify_final },
1439 { OSSL_FUNC_SIGNATURE_FREECTX, (void (*)(void))rsa_freectx },
1440 { OSSL_FUNC_SIGNATURE_DUPCTX, (void (*)(void))rsa_dupctx },
1441 { OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS, (void (*)(void))rsa_get_ctx_params },
1442 { OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS,
1443 (void (*)(void))rsa_gettable_ctx_params },
1444 { OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS, (void (*)(void))rsa_set_ctx_params },
1445 { OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS,
1446 (void (*)(void))rsa_settable_ctx_params },
1447 { OSSL_FUNC_SIGNATURE_GET_CTX_MD_PARAMS,
1448 (void (*)(void))rsa_get_ctx_md_params },
1449 { OSSL_FUNC_SIGNATURE_GETTABLE_CTX_MD_PARAMS,
1450 (void (*)(void))rsa_gettable_ctx_md_params },
1451 { OSSL_FUNC_SIGNATURE_SET_CTX_MD_PARAMS,
1452 (void (*)(void))rsa_set_ctx_md_params },
1453 { OSSL_FUNC_SIGNATURE_SETTABLE_CTX_MD_PARAMS,
1454 (void (*)(void))rsa_settable_ctx_md_params },