2 * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 * DSA low level APIs are deprecated for public use, but still ok for
14 #include "internal/deprecated.h"
18 #include "internal/cryptlib.h"
19 #include "internal/refcount.h"
20 #include "internal/namemap.h"
21 #include <openssl/bn.h>
22 #include <openssl/err.h>
23 #include <openssl/objects.h>
24 #include <openssl/evp.h>
25 #include <openssl/rsa.h>
26 #include <openssl/dsa.h>
27 #include <openssl/dh.h>
28 #include <openssl/ec.h>
29 #include <openssl/cmac.h>
31 # include <openssl/engine.h>
33 #include <openssl/params.h>
34 #include <openssl/param_build.h>
35 #include <openssl/encoder.h>
36 #include <openssl/core_names.h>
38 #include "internal/numbers.h" /* includes SIZE_MAX */
39 #include "internal/ffc.h"
40 #include "crypto/evp.h"
41 #include "crypto/dh.h"
42 #include "crypto/dsa.h"
43 #include "crypto/ec.h"
44 #include "crypto/ecx.h"
45 #include "crypto/rsa.h"
47 # include "crypto/asn1.h"
48 # include "crypto/x509.h"
50 #include "internal/provider.h"
51 #include "evp_local.h"
53 static int pkey_set_type(EVP_PKEY *pkey, ENGINE *e, int type, const char *str,
54 int len, EVP_KEYMGMT *keymgmt);
55 static void evp_pkey_free_it(EVP_PKEY *key);
59 /* The type of parameters selected in key parameter functions */
60 # define SELECT_PARAMETERS OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS
62 int EVP_PKEY_get_bits(const EVP_PKEY *pkey)
67 size = pkey->cache.bits;
68 if (pkey->ameth != NULL && pkey->ameth->pkey_bits != NULL)
69 size = pkey->ameth->pkey_bits(pkey);
71 return size < 0 ? 0 : size;
74 int EVP_PKEY_get_security_bits(const EVP_PKEY *pkey)
79 size = pkey->cache.security_bits;
80 if (pkey->ameth != NULL && pkey->ameth->pkey_security_bits != NULL)
81 size = pkey->ameth->pkey_security_bits(pkey);
83 return size < 0 ? 0 : size;
86 int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
88 # ifndef OPENSSL_NO_DSA
89 if (pkey->type == EVP_PKEY_DSA) {
90 int ret = pkey->save_parameters;
93 pkey->save_parameters = mode;
97 # ifndef OPENSSL_NO_EC
98 if (pkey->type == EVP_PKEY_EC) {
99 int ret = pkey->save_parameters;
102 pkey->save_parameters = mode;
109 int EVP_PKEY_set_ex_data(EVP_PKEY *key, int idx, void *arg)
111 return CRYPTO_set_ex_data(&key->ex_data, idx, arg);
114 void *EVP_PKEY_get_ex_data(const EVP_PKEY *key, int idx)
116 return CRYPTO_get_ex_data(&key->ex_data, idx);
119 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
122 * Clean up legacy stuff from this function when legacy support is gone.
125 EVP_PKEY *downgraded_from = NULL;
129 * If |to| is a legacy key and |from| isn't, we must make a downgraded
130 * copy of |from|. If that fails, this function fails.
132 if (evp_pkey_is_legacy(to) && evp_pkey_is_provided(from)) {
133 if (!evp_pkey_copy_downgraded(&downgraded_from, from))
135 from = downgraded_from;
139 * Make sure |to| is typed. Content is less important at this early
142 * 1. If |to| is untyped, assign |from|'s key type to it.
143 * 2. If |to| contains a legacy key, compare its |type| to |from|'s.
144 * (|from| was already downgraded above)
146 * If |to| is a provided key, there's nothing more to do here, functions
147 * like evp_keymgmt_util_copy() and evp_pkey_export_to_provider() called
148 * further down help us find out if they are the same or not.
150 if (evp_pkey_is_blank(to)) {
151 if (evp_pkey_is_legacy(from)) {
152 if (EVP_PKEY_set_type(to, from->type) == 0)
155 if (EVP_PKEY_set_type_by_keymgmt(to, from->keymgmt) == 0)
158 } else if (evp_pkey_is_legacy(to)) {
159 if (to->type != from->type) {
160 ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_KEY_TYPES);
165 if (EVP_PKEY_missing_parameters(from)) {
166 ERR_raise(ERR_LIB_EVP, EVP_R_MISSING_PARAMETERS);
170 if (!EVP_PKEY_missing_parameters(to)) {
171 if (EVP_PKEY_parameters_eq(to, from) == 1)
174 ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_PARAMETERS);
178 /* For purely provided keys, we just call the keymgmt utility */
179 if (to->keymgmt != NULL && from->keymgmt != NULL) {
180 ok = evp_keymgmt_util_copy(to, (EVP_PKEY *)from, SELECT_PARAMETERS);
185 * If |to| is provided, we know that |from| is legacy at this point.
186 * Try exporting |from| to |to|'s keymgmt, then use evp_keymgmt_dup()
187 * to copy the appropriate data to |to|'s keydata.
188 * We cannot override existing data so do it only if there is no keydata
191 if (to->keymgmt != NULL && to->keydata == NULL) {
192 EVP_KEYMGMT *to_keymgmt = to->keymgmt;
194 evp_pkey_export_to_provider((EVP_PKEY *)from, NULL, &to_keymgmt,
198 * If we get a NULL, it could be an internal error, or it could be
199 * that there's a key mismatch. We're pretending the latter...
201 if (from_keydata == NULL)
202 ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_KEY_TYPES);
204 ok = (to->keydata = evp_keymgmt_dup(to->keymgmt,
206 SELECT_PARAMETERS)) != NULL;
210 /* Both keys are legacy */
211 if (from->ameth != NULL && from->ameth->param_copy != NULL)
212 ok = from->ameth->param_copy(to, from);
214 EVP_PKEY_free(downgraded_from);
218 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
221 if (pkey->keymgmt != NULL)
222 return !evp_keymgmt_util_has((EVP_PKEY *)pkey, SELECT_PARAMETERS);
223 else if (pkey->ameth != NULL && pkey->ameth->param_missing != NULL)
224 return pkey->ameth->param_missing(pkey);
230 * This function is called for any mixture of keys except pure legacy pair.
231 * When legacy keys are gone, we replace a call to this functions with
232 * a call to evp_keymgmt_util_match().
234 static int evp_pkey_cmp_any(const EVP_PKEY *a, const EVP_PKEY *b,
237 EVP_KEYMGMT *keymgmt1 = NULL, *keymgmt2 = NULL;
238 void *keydata1 = NULL, *keydata2 = NULL, *tmp_keydata = NULL;
240 /* If none of them are provided, this function shouldn't have been called */
241 if (!ossl_assert(evp_pkey_is_provided(a) || evp_pkey_is_provided(b)))
244 /* For purely provided keys, we just call the keymgmt utility */
245 if (evp_pkey_is_provided(a) && evp_pkey_is_provided(b))
246 return evp_keymgmt_util_match((EVP_PKEY *)a, (EVP_PKEY *)b, selection);
249 * At this point, one of them is provided, the other not. This allows
250 * us to compare types using legacy NIDs.
252 if (evp_pkey_is_legacy(a)
253 && !EVP_KEYMGMT_is_a(b->keymgmt, OBJ_nid2sn(a->type)))
254 return -1; /* not the same key type */
255 if (evp_pkey_is_legacy(b)
256 && !EVP_KEYMGMT_is_a(a->keymgmt, OBJ_nid2sn(b->type)))
257 return -1; /* not the same key type */
260 * We've determined that they both are the same keytype, so the next
261 * step is to do a bit of cross export to ensure we have keydata for
262 * both keys in the same keymgmt.
264 keymgmt1 = a->keymgmt;
265 keydata1 = a->keydata;
266 keymgmt2 = b->keymgmt;
267 keydata2 = b->keydata;
269 if (keymgmt2 != NULL && keymgmt2->match != NULL) {
271 evp_pkey_export_to_provider((EVP_PKEY *)a, NULL, &keymgmt2, NULL);
272 if (tmp_keydata != NULL) {
274 keydata1 = tmp_keydata;
277 if (tmp_keydata == NULL && keymgmt1 != NULL && keymgmt1->match != NULL) {
279 evp_pkey_export_to_provider((EVP_PKEY *)b, NULL, &keymgmt1, NULL);
280 if (tmp_keydata != NULL) {
282 keydata2 = tmp_keydata;
286 /* If we still don't have matching keymgmt implementations, we give up */
287 if (keymgmt1 != keymgmt2)
290 /* If the keymgmt implementations are NULL, the export failed */
291 if (keymgmt1 == NULL)
294 return evp_keymgmt_match(keymgmt1, keydata1, keydata2, selection);
297 # ifndef OPENSSL_NO_DEPRECATED_3_0
298 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
300 return EVP_PKEY_parameters_eq(a, b);
304 int EVP_PKEY_parameters_eq(const EVP_PKEY *a, const EVP_PKEY *b)
307 * This will just call evp_keymgmt_util_match when legacy support
311 if (a->keymgmt != NULL || b->keymgmt != NULL)
312 return evp_pkey_cmp_any(a, b, SELECT_PARAMETERS);
314 /* All legacy keys */
315 if (a->type != b->type)
317 if (a->ameth != NULL && a->ameth->param_cmp != NULL)
318 return a->ameth->param_cmp(a, b);
322 # ifndef OPENSSL_NO_DEPRECATED_3_0
323 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
325 return EVP_PKEY_eq(a, b);
329 int EVP_PKEY_eq(const EVP_PKEY *a, const EVP_PKEY *b)
332 * This will just call evp_keymgmt_util_match when legacy support
336 /* Trivial shortcuts */
339 if (a == NULL || b == NULL)
342 if (a->keymgmt != NULL || b->keymgmt != NULL)
343 return evp_pkey_cmp_any(a, b, (SELECT_PARAMETERS
344 | OSSL_KEYMGMT_SELECT_KEYPAIR));
346 /* All legacy keys */
347 if (a->type != b->type)
350 if (a->ameth != NULL) {
352 /* Compare parameters if the algorithm has them */
353 if (a->ameth->param_cmp != NULL) {
354 ret = a->ameth->param_cmp(a, b);
359 if (a->ameth->pub_cmp != NULL)
360 return a->ameth->pub_cmp(a, b);
367 static EVP_PKEY *new_raw_key_int(OSSL_LIB_CTX *libctx,
372 const unsigned char *key,
376 EVP_PKEY *pkey = NULL;
377 EVP_PKEY_CTX *ctx = NULL;
378 const EVP_PKEY_ASN1_METHOD *ameth = NULL;
381 # ifndef OPENSSL_NO_ENGINE
382 /* Check if there is an Engine for this type */
387 ameth = EVP_PKEY_asn1_find_str(&tmpe, strtype, -1);
388 else if (nidtype != EVP_PKEY_NONE)
389 ameth = EVP_PKEY_asn1_find(&tmpe, nidtype);
391 /* If tmpe is NULL then no engine is claiming to support this type */
399 if (e == NULL && ameth == NULL) {
401 * No engine is claiming to support this type, so lets see if we have
404 ctx = EVP_PKEY_CTX_new_from_name(libctx,
405 strtype != NULL ? strtype
406 : OBJ_nid2sn(nidtype),
410 /* May fail if no provider available */
412 if (EVP_PKEY_fromdata_init(ctx) == 1) {
413 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END };
415 ERR_clear_last_mark();
416 params[0] = OSSL_PARAM_construct_octet_string(
417 key_is_priv ? OSSL_PKEY_PARAM_PRIV_KEY
418 : OSSL_PKEY_PARAM_PUB_KEY,
421 if (EVP_PKEY_fromdata(ctx, &pkey, EVP_PKEY_KEYPAIR, params) != 1) {
422 ERR_raise(ERR_LIB_EVP, EVP_R_KEY_SETUP_FAILED);
426 EVP_PKEY_CTX_free(ctx);
431 /* else not supported so fallback to legacy */
434 /* Legacy code path */
436 pkey = EVP_PKEY_new();
438 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
442 if (!pkey_set_type(pkey, e, nidtype, strtype, -1, NULL)) {
443 /* EVPerr already called */
447 if (!ossl_assert(pkey->ameth != NULL))
451 if (pkey->ameth->set_priv_key == NULL) {
452 ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
456 if (!pkey->ameth->set_priv_key(pkey, key, len)) {
457 ERR_raise(ERR_LIB_EVP, EVP_R_KEY_SETUP_FAILED);
461 if (pkey->ameth->set_pub_key == NULL) {
462 ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
466 if (!pkey->ameth->set_pub_key(pkey, key, len)) {
467 ERR_raise(ERR_LIB_EVP, EVP_R_KEY_SETUP_FAILED);
478 EVP_PKEY_CTX_free(ctx);
482 EVP_PKEY *EVP_PKEY_new_raw_private_key_ex(OSSL_LIB_CTX *libctx,
485 const unsigned char *priv, size_t len)
487 return new_raw_key_int(libctx, keytype, propq, EVP_PKEY_NONE, NULL, priv,
491 EVP_PKEY *EVP_PKEY_new_raw_private_key(int type, ENGINE *e,
492 const unsigned char *priv,
495 return new_raw_key_int(NULL, NULL, NULL, type, e, priv, len, 1);
498 EVP_PKEY *EVP_PKEY_new_raw_public_key_ex(OSSL_LIB_CTX *libctx,
499 const char *keytype, const char *propq,
500 const unsigned char *pub, size_t len)
502 return new_raw_key_int(libctx, keytype, propq, EVP_PKEY_NONE, NULL, pub,
506 EVP_PKEY *EVP_PKEY_new_raw_public_key(int type, ENGINE *e,
507 const unsigned char *pub,
510 return new_raw_key_int(NULL, NULL, NULL, type, e, pub, len, 0);
513 struct raw_key_details_st
520 static OSSL_CALLBACK get_raw_key_details;
521 static int get_raw_key_details(const OSSL_PARAM params[], void *arg)
523 const OSSL_PARAM *p = NULL;
524 struct raw_key_details_st *raw_key = arg;
526 if (raw_key->selection == OSSL_KEYMGMT_SELECT_PRIVATE_KEY) {
527 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY))
529 return OSSL_PARAM_get_octet_string(p, (void **)raw_key->key,
530 raw_key->key == NULL ? 0 : *raw_key->len,
532 } else if (raw_key->selection == OSSL_KEYMGMT_SELECT_PUBLIC_KEY) {
533 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY))
535 return OSSL_PARAM_get_octet_string(p, (void **)raw_key->key,
536 raw_key->key == NULL ? 0 : *raw_key->len,
543 int EVP_PKEY_get_raw_private_key(const EVP_PKEY *pkey, unsigned char *priv,
546 if (pkey->keymgmt != NULL) {
547 struct raw_key_details_st raw_key;
549 raw_key.key = priv == NULL ? NULL : &priv;
551 raw_key.selection = OSSL_KEYMGMT_SELECT_PRIVATE_KEY;
553 return evp_keymgmt_util_export(pkey, OSSL_KEYMGMT_SELECT_PRIVATE_KEY,
554 get_raw_key_details, &raw_key);
557 if (pkey->ameth == NULL) {
558 ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
562 if (pkey->ameth->get_priv_key == NULL) {
563 ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
567 if (!pkey->ameth->get_priv_key(pkey, priv, len)) {
568 ERR_raise(ERR_LIB_EVP, EVP_R_GET_RAW_KEY_FAILED);
575 int EVP_PKEY_get_raw_public_key(const EVP_PKEY *pkey, unsigned char *pub,
578 if (pkey->keymgmt != NULL) {
579 struct raw_key_details_st raw_key;
581 raw_key.key = pub == NULL ? NULL : &pub;
583 raw_key.selection = OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
585 return evp_keymgmt_util_export(pkey, OSSL_KEYMGMT_SELECT_PUBLIC_KEY,
586 get_raw_key_details, &raw_key);
589 if (pkey->ameth == NULL) {
590 ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
594 if (pkey->ameth->get_pub_key == NULL) {
595 ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
599 if (!pkey->ameth->get_pub_key(pkey, pub, len)) {
600 ERR_raise(ERR_LIB_EVP, EVP_R_GET_RAW_KEY_FAILED);
607 static EVP_PKEY *new_cmac_key_int(const unsigned char *priv, size_t len,
608 const char *cipher_name,
609 const EVP_CIPHER *cipher,
610 OSSL_LIB_CTX *libctx,
611 const char *propq, ENGINE *e)
613 # ifndef OPENSSL_NO_CMAC
614 # ifndef OPENSSL_NO_ENGINE
615 const char *engine_id = e != NULL ? ENGINE_get_id(e) : NULL;
617 OSSL_PARAM params[5], *p = params;
618 EVP_PKEY *pkey = NULL;
622 cipher_name = EVP_CIPHER_get0_name(cipher);
624 if (cipher_name == NULL) {
625 ERR_raise(ERR_LIB_EVP, EVP_R_KEY_SETUP_FAILED);
629 ctx = EVP_PKEY_CTX_new_from_name(libctx, "CMAC", propq);
633 if (EVP_PKEY_fromdata_init(ctx) <= 0) {
634 ERR_raise(ERR_LIB_EVP, EVP_R_KEY_SETUP_FAILED);
638 *p++ = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_PRIV_KEY,
640 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_CIPHER,
641 (char *)cipher_name, 0);
643 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_PROPERTIES,
645 # ifndef OPENSSL_NO_ENGINE
646 if (engine_id != NULL)
647 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_ENGINE,
648 (char *)engine_id, 0);
650 *p = OSSL_PARAM_construct_end();
652 if (EVP_PKEY_fromdata(ctx, &pkey, EVP_PKEY_KEYPAIR, params) <= 0) {
653 ERR_raise(ERR_LIB_EVP, EVP_R_KEY_SETUP_FAILED);
658 EVP_PKEY_CTX_free(ctx);
662 ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
667 EVP_PKEY *EVP_PKEY_new_CMAC_key(ENGINE *e, const unsigned char *priv,
668 size_t len, const EVP_CIPHER *cipher)
670 return new_cmac_key_int(priv, len, NULL, cipher, NULL, NULL, e);
673 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
675 return pkey_set_type(pkey, NULL, type, NULL, -1, NULL);
678 int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
680 return pkey_set_type(pkey, NULL, EVP_PKEY_NONE, str, len, NULL);
683 # ifndef OPENSSL_NO_ENGINE
684 int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *e)
687 if (!ENGINE_init(e)) {
688 ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB);
691 if (ENGINE_get_pkey_meth(e, pkey->type) == NULL) {
693 ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_ALGORITHM);
697 ENGINE_finish(pkey->pmeth_engine);
698 pkey->pmeth_engine = e;
702 ENGINE *EVP_PKEY_get0_engine(const EVP_PKEY *pkey)
708 # ifndef OPENSSL_NO_DEPRECATED_3_0
709 static void detect_foreign_key(EVP_PKEY *pkey)
711 switch (pkey->type) {
713 pkey->foreign = pkey->pkey.rsa != NULL
714 && ossl_rsa_is_foreign(pkey->pkey.rsa);
716 # ifndef OPENSSL_NO_EC
719 pkey->foreign = pkey->pkey.ec != NULL
720 && ossl_ec_key_is_foreign(pkey->pkey.ec);
723 # ifndef OPENSSL_NO_DSA
725 pkey->foreign = pkey->pkey.dsa != NULL
726 && ossl_dsa_is_foreign(pkey->pkey.dsa);
729 # ifndef OPENSSL_NO_DH
731 pkey->foreign = pkey->pkey.dh != NULL
732 && ossl_dh_is_foreign(pkey->pkey.dh);
741 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
743 # ifndef OPENSSL_NO_EC
746 pktype = EVP_PKEY_type(type);
747 if ((key != NULL) && (pktype == EVP_PKEY_EC || pktype == EVP_PKEY_SM2)) {
748 const EC_GROUP *group = EC_KEY_get0_group(key);
751 int curve = EC_GROUP_get_curve_name(group);
754 * Regardless of what is requested the SM2 curve must be SM2 type,
755 * and non SM2 curves are EC type.
757 if (curve == NID_sm2 && pktype == EVP_PKEY_EC)
759 else if(curve != NID_sm2 && pktype == EVP_PKEY_SM2)
765 if (pkey == NULL || !EVP_PKEY_set_type(pkey, type))
768 pkey->pkey.ptr = key;
769 detect_foreign_key(pkey);
771 return (key != NULL);
775 void *EVP_PKEY_get0(const EVP_PKEY *pkey)
780 if (!evp_pkey_is_provided(pkey))
781 return pkey->pkey.ptr;
786 const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len)
788 const ASN1_OCTET_STRING *os = NULL;
789 if (pkey->type != EVP_PKEY_HMAC) {
790 ERR_raise(ERR_LIB_EVP, EVP_R_EXPECTING_AN_HMAC_KEY);
793 os = evp_pkey_get_legacy((EVP_PKEY *)pkey);
801 # ifndef OPENSSL_NO_POLY1305
802 const unsigned char *EVP_PKEY_get0_poly1305(const EVP_PKEY *pkey, size_t *len)
804 const ASN1_OCTET_STRING *os = NULL;
805 if (pkey->type != EVP_PKEY_POLY1305) {
806 ERR_raise(ERR_LIB_EVP, EVP_R_EXPECTING_A_POLY1305_KEY);
809 os = evp_pkey_get_legacy((EVP_PKEY *)pkey);
818 # ifndef OPENSSL_NO_SIPHASH
819 const unsigned char *EVP_PKEY_get0_siphash(const EVP_PKEY *pkey, size_t *len)
821 const ASN1_OCTET_STRING *os = NULL;
823 if (pkey->type != EVP_PKEY_SIPHASH) {
824 ERR_raise(ERR_LIB_EVP, EVP_R_EXPECTING_A_SIPHASH_KEY);
827 os = evp_pkey_get_legacy((EVP_PKEY *)pkey);
836 # ifndef OPENSSL_NO_DSA
837 static DSA *evp_pkey_get0_DSA_int(const EVP_PKEY *pkey)
839 if (pkey->type != EVP_PKEY_DSA) {
840 ERR_raise(ERR_LIB_EVP, EVP_R_EXPECTING_A_DSA_KEY);
843 return evp_pkey_get_legacy((EVP_PKEY *)pkey);
846 const DSA *EVP_PKEY_get0_DSA(const EVP_PKEY *pkey)
848 return evp_pkey_get0_DSA_int(pkey);
851 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
853 int ret = EVP_PKEY_assign_DSA(pkey, key);
858 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
860 DSA *ret = evp_pkey_get0_DSA_int(pkey);
866 # endif /* OPENSSL_NO_DSA */
868 # ifndef OPENSSL_NO_EC
869 static const ECX_KEY *evp_pkey_get0_ECX_KEY(const EVP_PKEY *pkey, int type)
871 if (EVP_PKEY_get_base_id(pkey) != type) {
872 ERR_raise(ERR_LIB_EVP, EVP_R_EXPECTING_A_ECX_KEY);
875 return evp_pkey_get_legacy((EVP_PKEY *)pkey);
878 static ECX_KEY *evp_pkey_get1_ECX_KEY(EVP_PKEY *pkey, int type)
880 ECX_KEY *ret = (ECX_KEY *)evp_pkey_get0_ECX_KEY(pkey, type);
882 if (ret != NULL && !ossl_ecx_key_up_ref(ret))
887 # define IMPLEMENT_ECX_VARIANT(NAME) \
888 ECX_KEY *ossl_evp_pkey_get1_##NAME(EVP_PKEY *pkey) \
890 return evp_pkey_get1_ECX_KEY(pkey, EVP_PKEY_##NAME); \
892 IMPLEMENT_ECX_VARIANT(X25519)
893 IMPLEMENT_ECX_VARIANT(X448)
894 IMPLEMENT_ECX_VARIANT(ED25519)
895 IMPLEMENT_ECX_VARIANT(ED448)
899 # if !defined(OPENSSL_NO_DH) && !defined(OPENSSL_NO_DEPRECATED_3_0)
901 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *dhkey)
906 * ossl_dh_is_named_safe_prime_group() returns 1 for named safe prime groups
907 * related to ffdhe and modp (which cache q = (p - 1) / 2),
908 * and returns 0 for all other dh parameter generation types including
909 * RFC5114 named groups.
911 * The EVP_PKEY_DH type is used for dh parameter generation types:
912 * - named safe prime groups related to ffdhe and modp
913 * - safe prime generator
915 * The type EVP_PKEY_DHX is used for dh parameter generation types
916 * - fips186-4 and fips186-2
917 * - rfc5114 named groups.
919 * The EVP_PKEY_DH type is used to save PKCS#3 data than can be stored
921 * The EVP_PKEY_DHX type is used to save X9.42 data that requires the
922 * q value to be stored.
924 if (ossl_dh_is_named_safe_prime_group(dhkey))
927 type = DH_get0_q(dhkey) == NULL ? EVP_PKEY_DH : EVP_PKEY_DHX;
929 ret = EVP_PKEY_assign(pkey, type, dhkey);
936 DH *evp_pkey_get0_DH_int(const EVP_PKEY *pkey)
938 if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) {
939 ERR_raise(ERR_LIB_EVP, EVP_R_EXPECTING_A_DH_KEY);
942 return evp_pkey_get_legacy((EVP_PKEY *)pkey);
945 const DH *EVP_PKEY_get0_DH(const EVP_PKEY *pkey)
947 return evp_pkey_get0_DH_int(pkey);
950 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
952 DH *ret = evp_pkey_get0_DH_int(pkey);
960 int EVP_PKEY_type(int type)
963 const EVP_PKEY_ASN1_METHOD *ameth;
965 ameth = EVP_PKEY_asn1_find(&e, type);
967 ret = ameth->pkey_id;
970 # ifndef OPENSSL_NO_ENGINE
976 int EVP_PKEY_get_id(const EVP_PKEY *pkey)
981 int EVP_PKEY_get_base_id(const EVP_PKEY *pkey)
983 return EVP_PKEY_type(pkey->type);
987 * These hard coded cases are pure hackery to get around the fact
988 * that names in crypto/objects/objects.txt are a mess. There is
989 * no "EC", and "RSA" leads to the NID for 2.5.8.1.1, an OID that's
990 * fallen out in favor of { pkcs-1 1 }, i.e. 1.2.840.113549.1.1.1,
991 * the NID of which is used for EVP_PKEY_RSA. Strangely enough,
992 * "DSA" is accurate... but still, better be safe and hard-code
993 * names that we know.
994 * On a similar topic, EVP_PKEY_type(EVP_PKEY_SM2) will result in
995 * EVP_PKEY_EC, because of aliasing.
996 * This should be cleaned away along with all other #legacy support.
998 static const OSSL_ITEM standard_name2type[] = {
999 { EVP_PKEY_RSA, "RSA" },
1000 { EVP_PKEY_RSA_PSS, "RSA-PSS" },
1001 { EVP_PKEY_EC, "EC" },
1002 { EVP_PKEY_ED25519, "ED25519" },
1003 { EVP_PKEY_ED448, "ED448" },
1004 { EVP_PKEY_X25519, "X25519" },
1005 { EVP_PKEY_X448, "X448" },
1006 { EVP_PKEY_SM2, "SM2" },
1007 { EVP_PKEY_DH, "DH" },
1008 { EVP_PKEY_DHX, "X9.42 DH" },
1009 { EVP_PKEY_DHX, "DHX" },
1010 { EVP_PKEY_DSA, "DSA" },
1013 int evp_pkey_name2type(const char *name)
1018 for (i = 0; i < OSSL_NELEM(standard_name2type); i++) {
1019 if (OPENSSL_strcasecmp(name, standard_name2type[i].ptr) == 0)
1020 return (int)standard_name2type[i].id;
1023 if ((type = EVP_PKEY_type(OBJ_sn2nid(name))) != NID_undef)
1025 return EVP_PKEY_type(OBJ_ln2nid(name));
1028 const char *evp_pkey_type2name(int type)
1032 for (i = 0; i < OSSL_NELEM(standard_name2type); i++) {
1033 if (type == (int)standard_name2type[i].id)
1034 return standard_name2type[i].ptr;
1037 return OBJ_nid2sn(type);
1040 int EVP_PKEY_is_a(const EVP_PKEY *pkey, const char *name)
1042 if (pkey->keymgmt == NULL) {
1043 int type = evp_pkey_name2type(name);
1045 return pkey->type == type;
1047 return EVP_KEYMGMT_is_a(pkey->keymgmt, name);
1050 int EVP_PKEY_type_names_do_all(const EVP_PKEY *pkey,
1051 void (*fn)(const char *name, void *data),
1054 if (!evp_pkey_is_typed(pkey))
1057 if (!evp_pkey_is_provided(pkey)) {
1058 const char *name = OBJ_nid2sn(EVP_PKEY_get_id(pkey));
1063 return EVP_KEYMGMT_names_do_all(pkey->keymgmt, fn, data);
1066 int EVP_PKEY_can_sign(const EVP_PKEY *pkey)
1068 if (pkey->keymgmt == NULL) {
1069 switch (EVP_PKEY_get_base_id(pkey)) {
1072 # ifndef OPENSSL_NO_DSA
1076 # ifndef OPENSSL_NO_EC
1077 case EVP_PKEY_ED25519:
1078 case EVP_PKEY_ED448:
1080 case EVP_PKEY_EC: /* Including SM2 */
1081 return EC_KEY_can_sign(pkey->pkey.ec);
1087 const OSSL_PROVIDER *prov = EVP_KEYMGMT_get0_provider(pkey->keymgmt);
1088 OSSL_LIB_CTX *libctx = ossl_provider_libctx(prov);
1089 const char *supported_sig =
1090 pkey->keymgmt->query_operation_name != NULL
1091 ? pkey->keymgmt->query_operation_name(OSSL_OP_SIGNATURE)
1092 : EVP_KEYMGMT_get0_name(pkey->keymgmt);
1093 EVP_SIGNATURE *signature = NULL;
1095 signature = EVP_SIGNATURE_fetch(libctx, supported_sig, NULL);
1096 if (signature != NULL) {
1097 EVP_SIGNATURE_free(signature);
1104 static int print_reset_indent(BIO **out, int pop_f_prefix, long saved_indent)
1106 BIO_set_indent(*out, saved_indent);
1108 BIO *next = BIO_pop(*out);
1116 static int print_set_indent(BIO **out, int *pop_f_prefix, long *saved_indent,
1122 long i = BIO_get_indent(*out);
1124 *saved_indent = (i < 0 ? 0 : i);
1125 if (BIO_set_indent(*out, indent) <= 0) {
1126 if ((*out = BIO_push(BIO_new(BIO_f_prefix()), *out)) == NULL)
1130 if (BIO_set_indent(*out, indent) <= 0) {
1131 print_reset_indent(out, *pop_f_prefix, *saved_indent);
1138 static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
1141 return BIO_indent(out, indent, 128)
1142 && BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
1143 kstr, OBJ_nid2ln(pkey->type)) > 0;
1146 static int print_pkey(const EVP_PKEY *pkey, BIO *out, int indent,
1147 int selection /* For provided encoding */,
1148 const char *propquery /* For provided encoding */,
1149 int (*legacy_print)(BIO *out, const EVP_PKEY *pkey,
1150 int indent, ASN1_PCTX *pctx),
1151 ASN1_PCTX *legacy_pctx /* For legacy print */)
1155 OSSL_ENCODER_CTX *ctx = NULL;
1156 int ret = -2; /* default to unsupported */
1158 if (!print_set_indent(&out, &pop_f_prefix, &saved_indent, indent))
1161 ctx = OSSL_ENCODER_CTX_new_for_pkey(pkey, selection, "TEXT", NULL,
1163 if (OSSL_ENCODER_CTX_get_num_encoders(ctx) != 0)
1164 ret = OSSL_ENCODER_to_bio(ctx, out);
1165 OSSL_ENCODER_CTX_free(ctx);
1170 /* legacy fallback */
1171 if (legacy_print != NULL)
1172 ret = legacy_print(out, pkey, 0, legacy_pctx);
1174 ret = unsup_alg(out, pkey, 0, "Public Key");
1177 print_reset_indent(&out, pop_f_prefix, saved_indent);
1181 int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
1182 int indent, ASN1_PCTX *pctx)
1184 return print_pkey(pkey, out, indent, EVP_PKEY_PUBLIC_KEY, NULL,
1185 (pkey->ameth != NULL ? pkey->ameth->pub_print : NULL),
1189 int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
1190 int indent, ASN1_PCTX *pctx)
1192 return print_pkey(pkey, out, indent, EVP_PKEY_KEYPAIR, NULL,
1193 (pkey->ameth != NULL ? pkey->ameth->priv_print : NULL),
1197 int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
1198 int indent, ASN1_PCTX *pctx)
1200 return print_pkey(pkey, out, indent, EVP_PKEY_KEY_PARAMETERS, NULL,
1201 (pkey->ameth != NULL ? pkey->ameth->param_print : NULL),
1205 # ifndef OPENSSL_NO_STDIO
1206 int EVP_PKEY_print_public_fp(FILE *fp, const EVP_PKEY *pkey,
1207 int indent, ASN1_PCTX *pctx)
1210 BIO *b = BIO_new_fp(fp, BIO_NOCLOSE);
1214 ret = EVP_PKEY_print_public(b, pkey, indent, pctx);
1219 int EVP_PKEY_print_private_fp(FILE *fp, const EVP_PKEY *pkey,
1220 int indent, ASN1_PCTX *pctx)
1223 BIO *b = BIO_new_fp(fp, BIO_NOCLOSE);
1227 ret = EVP_PKEY_print_private(b, pkey, indent, pctx);
1232 int EVP_PKEY_print_params_fp(FILE *fp, const EVP_PKEY *pkey,
1233 int indent, ASN1_PCTX *pctx)
1236 BIO *b = BIO_new_fp(fp, BIO_NOCLOSE);
1240 ret = EVP_PKEY_print_params(b, pkey, indent, pctx);
1246 static void mdname2nid(const char *mdname, void *data)
1248 int *nid = (int *)data;
1250 if (*nid != NID_undef)
1253 *nid = OBJ_sn2nid(mdname);
1254 if (*nid == NID_undef)
1255 *nid = OBJ_ln2nid(mdname);
1258 static int legacy_asn1_ctrl_to_param(EVP_PKEY *pkey, int op,
1259 int arg1, void *arg2)
1261 if (pkey->keymgmt == NULL)
1264 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
1266 char mdname[80] = "";
1267 int rv = EVP_PKEY_get_default_digest_name(pkey, mdname,
1272 OSSL_LIB_CTX *libctx = ossl_provider_libctx(pkey->keymgmt->prov);
1273 /* Make sure the MD is in the namemap if available */
1275 OSSL_NAMEMAP *namemap;
1276 int nid = NID_undef;
1278 (void)ERR_set_mark();
1279 md = EVP_MD_fetch(libctx, mdname, NULL);
1280 (void)ERR_pop_to_mark();
1281 namemap = ossl_namemap_stored(libctx);
1284 * The only reason to fetch the MD was to make sure it is in the
1285 * namemap. We can immediately free it.
1288 mdnum = ossl_namemap_name2num(namemap, mdname);
1293 * We have the namemap number - now we need to find the
1296 if (!ossl_namemap_doall_names(namemap, mdnum, mdname2nid, &nid))
1307 static int evp_pkey_asn1_ctrl(EVP_PKEY *pkey, int op, int arg1, void *arg2)
1309 if (pkey->ameth == NULL)
1310 return legacy_asn1_ctrl_to_param(pkey, op, arg1, arg2);
1311 if (pkey->ameth->pkey_ctrl == NULL)
1313 return pkey->ameth->pkey_ctrl(pkey, op, arg1, arg2);
1316 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
1318 return evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 0, pnid);
1321 int EVP_PKEY_get_default_digest_name(EVP_PKEY *pkey,
1322 char *mdname, size_t mdname_sz)
1324 if (pkey->ameth == NULL)
1325 return evp_keymgmt_util_get_deflt_digest_name(pkey->keymgmt,
1330 int nid = NID_undef;
1331 int rv = EVP_PKEY_get_default_digest_nid(pkey, &nid);
1332 const char *name = rv > 0 ? OBJ_nid2sn(nid) : NULL;
1335 OPENSSL_strlcpy(mdname, name, mdname_sz);
1340 int EVP_PKEY_get_group_name(const EVP_PKEY *pkey, char *gname, size_t gname_sz,
1343 return EVP_PKEY_get_utf8_string_param(pkey, OSSL_PKEY_PARAM_GROUP_NAME,
1344 gname, gname_sz, gname_len);
1347 int EVP_PKEY_digestsign_supports_digest(EVP_PKEY *pkey, OSSL_LIB_CTX *libctx,
1348 const char *name, const char *propq)
1351 EVP_MD_CTX *ctx = NULL;
1353 if ((ctx = EVP_MD_CTX_new()) == NULL)
1357 rv = EVP_DigestSignInit_ex(ctx, NULL, name, libctx,
1361 EVP_MD_CTX_free(ctx);
1365 int EVP_PKEY_set1_encoded_public_key(EVP_PKEY *pkey, const unsigned char *pub,
1368 if (pkey != NULL && evp_pkey_is_provided(pkey))
1370 EVP_PKEY_set_octet_string_param(pkey,
1371 OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY,
1372 (unsigned char *)pub, publen);
1374 if (publen > INT_MAX)
1376 /* Historically this function was EVP_PKEY_set1_tls_encodedpoint */
1377 if (evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SET1_TLS_ENCPT, publen,
1383 size_t EVP_PKEY_get1_encoded_public_key(EVP_PKEY *pkey, unsigned char **ppub)
1387 if (pkey != NULL && evp_pkey_is_provided(pkey)) {
1388 size_t return_size = OSSL_PARAM_UNMODIFIED;
1391 * We know that this is going to fail, but it will give us a size
1394 EVP_PKEY_get_octet_string_param(pkey,
1395 OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY,
1396 NULL, 0, &return_size);
1397 if (return_size == OSSL_PARAM_UNMODIFIED)
1400 *ppub = OPENSSL_malloc(return_size);
1404 if (!EVP_PKEY_get_octet_string_param(pkey,
1405 OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY,
1406 *ppub, return_size, NULL))
1412 rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_GET1_TLS_ENCPT, 0, ppub);
1418 #endif /* FIPS_MODULE */
1420 /*- All methods below can also be used in FIPS_MODULE */
1422 EVP_PKEY *EVP_PKEY_new(void)
1424 EVP_PKEY *ret = OPENSSL_zalloc(sizeof(*ret));
1427 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
1431 ret->type = EVP_PKEY_NONE;
1432 ret->save_type = EVP_PKEY_NONE;
1433 ret->references = 1;
1435 ret->lock = CRYPTO_THREAD_lock_new();
1436 if (ret->lock == NULL) {
1437 EVPerr(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
1442 ret->save_parameters = 1;
1443 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_EVP_PKEY, ret, &ret->ex_data)) {
1444 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
1451 CRYPTO_THREAD_lock_free(ret->lock);
1457 * Setup a public key management method.
1459 * For legacy keys, either |type| or |str| is expected to have the type
1460 * information. In this case, the setup consists of finding an ASN1 method
1461 * and potentially an ENGINE, and setting those fields in |pkey|.
1463 * For provider side keys, |keymgmt| is expected to be non-NULL. In this
1464 * case, the setup consists of setting the |keymgmt| field in |pkey|.
1466 * If pkey is NULL just return 1 or 0 if the key management method exists.
1469 static int pkey_set_type(EVP_PKEY *pkey, ENGINE *e, int type, const char *str,
1470 int len, EVP_KEYMGMT *keymgmt)
1473 const EVP_PKEY_ASN1_METHOD *ameth = NULL;
1474 ENGINE **eptr = (e == NULL) ? &e : NULL;
1478 * The setups can't set both legacy and provider side methods.
1481 if (!ossl_assert(type == EVP_PKEY_NONE || keymgmt == NULL)
1482 || !ossl_assert(e == NULL || keymgmt == NULL)) {
1483 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1491 free_it = free_it || pkey->pkey.ptr != NULL;
1493 free_it = free_it || pkey->keydata != NULL;
1495 evp_pkey_free_it(pkey);
1498 * If key type matches and a method exists then this lookup has
1499 * succeeded once so just indicate success.
1501 if (pkey->type != EVP_PKEY_NONE
1502 && type == pkey->save_type
1503 && pkey->ameth != NULL)
1505 # ifndef OPENSSL_NO_ENGINE
1506 /* If we have ENGINEs release them */
1507 ENGINE_finish(pkey->engine);
1508 pkey->engine = NULL;
1509 ENGINE_finish(pkey->pmeth_engine);
1510 pkey->pmeth_engine = NULL;
1516 ameth = EVP_PKEY_asn1_find_str(eptr, str, len);
1517 else if (type != EVP_PKEY_NONE)
1518 ameth = EVP_PKEY_asn1_find(eptr, type);
1519 # ifndef OPENSSL_NO_ENGINE
1520 if (pkey == NULL && eptr != NULL)
1530 check = check && ameth == NULL;
1532 check = check && keymgmt == NULL;
1534 ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_ALGORITHM);
1539 if (keymgmt != NULL && !EVP_KEYMGMT_up_ref(keymgmt)) {
1540 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1544 pkey->keymgmt = keymgmt;
1546 pkey->save_type = type;
1551 * If the internal "origin" key is provider side, don't save |ameth|.
1552 * The main reason is that |ameth| is one factor to detect that the
1553 * internal "origin" key is a legacy one.
1555 if (keymgmt == NULL)
1556 pkey->ameth = ameth;
1559 * The EVP_PKEY_ASN1_METHOD |pkey_id| retains its legacy key purpose
1560 * for any key type that has a legacy implementation, regardless of
1561 * if the internal key is a legacy or a provider side one. When
1562 * there is no legacy implementation for the key, the type becomes
1563 * EVP_PKEY_KEYMGMT, which indicates that one should be cautious
1564 * with functions that expect legacy internal keys.
1566 if (ameth != NULL) {
1567 if (type == EVP_PKEY_NONE)
1568 pkey->type = ameth->pkey_id;
1570 pkey->type = EVP_PKEY_KEYMGMT;
1572 # ifndef OPENSSL_NO_ENGINE
1573 if (eptr == NULL && e != NULL && !ENGINE_init(e)) {
1574 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
1585 static void find_ameth(const char *name, void *data)
1587 const char **str = data;
1590 * The error messages from pkey_set_type() are uninteresting here,
1595 if (pkey_set_type(NULL, NULL, EVP_PKEY_NONE, name, strlen(name),
1599 else if (str[1] == NULL)
1607 int EVP_PKEY_set_type_by_keymgmt(EVP_PKEY *pkey, EVP_KEYMGMT *keymgmt)
1610 # define EVP_PKEY_TYPE_STR str[0]
1611 # define EVP_PKEY_TYPE_STRLEN (str[0] == NULL ? -1 : (int)strlen(str[0]))
1613 * Find at most two strings that have an associated EVP_PKEY_ASN1_METHOD
1614 * Ideally, only one should be found. If two (or more) are found, the
1615 * match is ambiguous. This should never happen, but...
1617 const char *str[2] = { NULL, NULL };
1619 if (!EVP_KEYMGMT_names_do_all(keymgmt, find_ameth, &str)
1620 || str[1] != NULL) {
1621 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1625 # define EVP_PKEY_TYPE_STR NULL
1626 # define EVP_PKEY_TYPE_STRLEN -1
1628 return pkey_set_type(pkey, NULL, EVP_PKEY_NONE,
1629 EVP_PKEY_TYPE_STR, EVP_PKEY_TYPE_STRLEN,
1632 #undef EVP_PKEY_TYPE_STR
1633 #undef EVP_PKEY_TYPE_STRLEN
1636 int EVP_PKEY_up_ref(EVP_PKEY *pkey)
1640 if (CRYPTO_UP_REF(&pkey->references, &i, pkey->lock) <= 0)
1643 REF_PRINT_COUNT("EVP_PKEY", pkey);
1644 REF_ASSERT_ISNT(i < 2);
1645 return ((i > 1) ? 1 : 0);
1649 EVP_PKEY *EVP_PKEY_dup(EVP_PKEY *pkey)
1654 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
1658 if ((dup_pk = EVP_PKEY_new()) == NULL)
1661 if (evp_pkey_is_blank(pkey))
1664 if (evp_pkey_is_provided(pkey)) {
1665 if (!evp_keymgmt_util_copy(dup_pk, pkey,
1666 OSSL_KEYMGMT_SELECT_ALL))
1671 if (evp_pkey_is_legacy(pkey)) {
1672 const EVP_PKEY_ASN1_METHOD *ameth = pkey->ameth;
1674 if (ameth == NULL || ameth->copy == NULL) {
1675 if (pkey->pkey.ptr == NULL /* empty key, just set type */
1676 && EVP_PKEY_set_type(dup_pk, pkey->type) != 0)
1678 ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_KEY_TYPE);
1681 if (!ameth->copy(dup_pk, pkey))
1688 /* copy auxiliary data */
1689 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_EVP_PKEY,
1690 &dup_pk->ex_data, &pkey->ex_data))
1693 if (pkey->attributes != NULL) {
1694 if ((dup_pk->attributes = ossl_x509at_dup(pkey->attributes)) == NULL)
1699 EVP_PKEY_free(dup_pk);
1703 void evp_pkey_free_legacy(EVP_PKEY *x)
1705 const EVP_PKEY_ASN1_METHOD *ameth = x->ameth;
1706 ENGINE *tmpe = NULL;
1708 if (ameth == NULL && x->legacy_cache_pkey.ptr != NULL)
1709 ameth = EVP_PKEY_asn1_find(&tmpe, x->type);
1711 if (ameth != NULL) {
1712 if (x->legacy_cache_pkey.ptr != NULL) {
1714 * We should never have both a legacy origin key, and a key in the
1717 assert(x->pkey.ptr == NULL);
1719 * For the purposes of freeing we make the legacy cache look like
1720 * a legacy origin key.
1722 x->pkey = x->legacy_cache_pkey;
1723 x->legacy_cache_pkey.ptr = NULL;
1725 if (ameth->pkey_free != NULL)
1726 ameth->pkey_free(x);
1729 # ifndef OPENSSL_NO_ENGINE
1730 ENGINE_finish(tmpe);
1731 ENGINE_finish(x->engine);
1733 ENGINE_finish(x->pmeth_engine);
1734 x->pmeth_engine = NULL;
1737 #endif /* FIPS_MODULE */
1739 static void evp_pkey_free_it(EVP_PKEY *x)
1741 /* internal function; x is never NULL */
1742 evp_keymgmt_util_clear_operation_cache(x, 1);
1744 evp_pkey_free_legacy(x);
1747 if (x->keymgmt != NULL) {
1748 evp_keymgmt_freedata(x->keymgmt, x->keydata);
1749 EVP_KEYMGMT_free(x->keymgmt);
1753 x->type = EVP_PKEY_NONE;
1756 void EVP_PKEY_free(EVP_PKEY *x)
1763 CRYPTO_DOWN_REF(&x->references, &i, x->lock);
1764 REF_PRINT_COUNT("EVP_PKEY", x);
1767 REF_ASSERT_ISNT(i < 0);
1768 evp_pkey_free_it(x);
1770 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_EVP_PKEY, x, &x->ex_data);
1772 CRYPTO_THREAD_lock_free(x->lock);
1774 sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
1779 int EVP_PKEY_get_size(const EVP_PKEY *pkey)
1784 size = pkey->cache.size;
1786 if (pkey->ameth != NULL && pkey->ameth->pkey_size != NULL)
1787 size = pkey->ameth->pkey_size(pkey);
1790 return size < 0 ? 0 : size;
1793 const char *EVP_PKEY_get0_description(const EVP_PKEY *pkey)
1795 if (!evp_pkey_is_assigned(pkey))
1798 if (evp_pkey_is_provided(pkey) && pkey->keymgmt->description != NULL)
1799 return pkey->keymgmt->description;
1801 if (pkey->ameth != NULL)
1802 return pkey->ameth->info;
1807 void *evp_pkey_export_to_provider(EVP_PKEY *pk, OSSL_LIB_CTX *libctx,
1808 EVP_KEYMGMT **keymgmt,
1809 const char *propquery)
1811 EVP_KEYMGMT *allocated_keymgmt = NULL;
1812 EVP_KEYMGMT *tmp_keymgmt = NULL;
1813 void *keydata = NULL;
1819 /* No key data => nothing to export */
1822 check = check && pk->pkey.ptr == NULL;
1824 check = check && pk->keydata == NULL;
1829 if (pk->pkey.ptr != NULL) {
1831 * If the legacy key doesn't have an dirty counter or export function,
1834 if (pk->ameth->dirty_cnt == NULL || pk->ameth->export_to == NULL)
1839 if (keymgmt != NULL) {
1840 tmp_keymgmt = *keymgmt;
1845 * If no keymgmt was given or found, get a default keymgmt. We do so by
1846 * letting EVP_PKEY_CTX_new_from_pkey() do it for us, then we steal it.
1848 if (tmp_keymgmt == NULL) {
1849 EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new_from_pkey(libctx, pk, propquery);
1853 tmp_keymgmt = ctx->keymgmt;
1854 ctx->keymgmt = NULL;
1855 EVP_PKEY_CTX_free(ctx);
1858 /* If there's still no keymgmt to be had, give up */
1859 if (tmp_keymgmt == NULL)
1863 if (pk->pkey.ptr != NULL) {
1867 * If the legacy "origin" hasn't changed since last time, we try
1868 * to find our keymgmt in the operation cache. If it has changed,
1869 * |i| remains zero, and we will clear the cache further down.
1871 if (pk->ameth->dirty_cnt(pk) == pk->dirty_cnt_copy) {
1872 if (!CRYPTO_THREAD_read_lock(pk->lock))
1874 op = evp_keymgmt_util_find_operation_cache(pk, tmp_keymgmt);
1877 * If |tmp_keymgmt| is present in the operation cache, it means
1878 * that export doesn't need to be redone. In that case, we take
1879 * token copies of the cached pointers, to have token success
1882 if (op != NULL && op->keymgmt != NULL) {
1883 keydata = op->keydata;
1884 CRYPTO_THREAD_unlock(pk->lock);
1887 CRYPTO_THREAD_unlock(pk->lock);
1890 /* Make sure that the keymgmt key type matches the legacy NID */
1891 if (!EVP_KEYMGMT_is_a(tmp_keymgmt, OBJ_nid2sn(pk->type)))
1894 if ((keydata = evp_keymgmt_newdata(tmp_keymgmt)) == NULL)
1897 if (!pk->ameth->export_to(pk, keydata, tmp_keymgmt->import,
1898 libctx, propquery)) {
1899 evp_keymgmt_freedata(tmp_keymgmt, keydata);
1905 * If the dirty counter changed since last time, then clear the
1906 * operation cache. In that case, we know that |i| is zero. Just
1907 * in case this is a re-export, we increment then decrement the
1908 * keymgmt reference counter.
1910 if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) { /* refcnt++ */
1911 evp_keymgmt_freedata(tmp_keymgmt, keydata);
1916 if (!CRYPTO_THREAD_write_lock(pk->lock))
1918 if (pk->ameth->dirty_cnt(pk) != pk->dirty_cnt_copy
1919 && !evp_keymgmt_util_clear_operation_cache(pk, 0)) {
1920 CRYPTO_THREAD_unlock(pk->lock);
1921 evp_keymgmt_freedata(tmp_keymgmt, keydata);
1923 EVP_KEYMGMT_free(tmp_keymgmt);
1926 EVP_KEYMGMT_free(tmp_keymgmt); /* refcnt-- */
1928 /* Check to make sure some other thread didn't get there first */
1929 op = evp_keymgmt_util_find_operation_cache(pk, tmp_keymgmt);
1930 if (op != NULL && op->keymgmt != NULL) {
1931 void *tmp_keydata = op->keydata;
1933 CRYPTO_THREAD_unlock(pk->lock);
1934 evp_keymgmt_freedata(tmp_keymgmt, keydata);
1935 keydata = tmp_keydata;
1939 /* Add the new export to the operation cache */
1940 if (!evp_keymgmt_util_cache_keydata(pk, tmp_keymgmt, keydata)) {
1941 CRYPTO_THREAD_unlock(pk->lock);
1942 evp_keymgmt_freedata(tmp_keymgmt, keydata);
1947 /* Synchronize the dirty count */
1948 pk->dirty_cnt_copy = pk->ameth->dirty_cnt(pk);
1950 CRYPTO_THREAD_unlock(pk->lock);
1953 #endif /* FIPS_MODULE */
1955 keydata = evp_keymgmt_util_export_to_provider(pk, tmp_keymgmt);
1959 * If nothing was exported, |tmp_keymgmt| might point at a freed
1960 * EVP_KEYMGMT, so we clear it to be safe. It shouldn't be useful for
1961 * the caller either way in that case.
1963 if (keydata == NULL)
1966 if (keymgmt != NULL)
1967 *keymgmt = tmp_keymgmt;
1969 EVP_KEYMGMT_free(allocated_keymgmt);
1974 int evp_pkey_copy_downgraded(EVP_PKEY **dest, const EVP_PKEY *src)
1976 if (!ossl_assert(dest != NULL))
1979 if (evp_pkey_is_assigned(src) && evp_pkey_is_provided(src)) {
1980 EVP_KEYMGMT *keymgmt = src->keymgmt;
1981 void *keydata = src->keydata;
1982 int type = src->type;
1983 const char *keytype = NULL;
1985 keytype = EVP_KEYMGMT_get0_name(keymgmt);
1988 * If the type is EVP_PKEY_NONE, then we have a problem somewhere
1989 * else in our code. If it's not one of the well known EVP_PKEY_xxx
1990 * values, it should at least be EVP_PKEY_KEYMGMT at this point.
1991 * The check is kept as a safety measure.
1993 if (!ossl_assert(type != EVP_PKEY_NONE)) {
1994 ERR_raise_data(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR,
1995 "keymgmt key type = %s but legacy type = EVP_PKEY_NONE",
2000 /* Prefer the legacy key type name for error reporting */
2001 if (type != EVP_PKEY_KEYMGMT)
2002 keytype = OBJ_nid2sn(type);
2004 /* Make sure we have a clean slate to copy into */
2005 if (*dest == NULL) {
2006 *dest = EVP_PKEY_new();
2007 if (*dest == NULL) {
2008 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
2012 evp_pkey_free_it(*dest);
2015 if (EVP_PKEY_set_type(*dest, type)) {
2016 /* If the key is typed but empty, we're done */
2017 if (keydata == NULL)
2020 if ((*dest)->ameth->import_from == NULL) {
2021 ERR_raise_data(ERR_LIB_EVP, EVP_R_NO_IMPORT_FUNCTION,
2022 "key type = %s", keytype);
2025 * We perform the export in the same libctx as the keymgmt
2026 * that we are using.
2028 OSSL_LIB_CTX *libctx =
2029 ossl_provider_libctx(keymgmt->prov);
2030 EVP_PKEY_CTX *pctx =
2031 EVP_PKEY_CTX_new_from_pkey(libctx, *dest, NULL);
2034 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
2037 && evp_keymgmt_export(keymgmt, keydata,
2038 OSSL_KEYMGMT_SELECT_ALL,
2039 (*dest)->ameth->import_from,
2041 /* Synchronize the dirty count */
2042 (*dest)->dirty_cnt_copy = (*dest)->ameth->dirty_cnt(*dest);
2044 EVP_PKEY_CTX_free(pctx);
2047 EVP_PKEY_CTX_free(pctx);
2050 ERR_raise_data(ERR_LIB_EVP, EVP_R_KEYMGMT_EXPORT_FAILURE,
2051 "key type = %s", keytype);
2058 void *evp_pkey_get_legacy(EVP_PKEY *pk)
2060 EVP_PKEY *tmp_copy = NULL;
2063 if (!ossl_assert(pk != NULL))
2067 * If this isn't an assigned provider side key, we just use any existing
2068 * origin legacy key.
2070 if (!evp_pkey_is_assigned(pk))
2072 if (!evp_pkey_is_provided(pk))
2073 return pk->pkey.ptr;
2075 if (!CRYPTO_THREAD_read_lock(pk->lock))
2078 ret = pk->legacy_cache_pkey.ptr;
2080 if (!CRYPTO_THREAD_unlock(pk->lock))
2086 if (!evp_pkey_copy_downgraded(&tmp_copy, pk))
2089 if (!CRYPTO_THREAD_write_lock(pk->lock))
2092 /* Check again in case some other thread has updated it in the meantime */
2093 ret = pk->legacy_cache_pkey.ptr;
2095 /* Steal the legacy key reference from the temporary copy */
2096 ret = pk->legacy_cache_pkey.ptr = tmp_copy->pkey.ptr;
2097 tmp_copy->pkey.ptr = NULL;
2100 if (!CRYPTO_THREAD_unlock(pk->lock)) {
2106 EVP_PKEY_free(tmp_copy);
2110 #endif /* FIPS_MODULE */
2112 int EVP_PKEY_get_bn_param(const EVP_PKEY *pkey, const char *key_name,
2116 OSSL_PARAM params[2];
2117 unsigned char buffer[2048];
2118 unsigned char *buf = NULL;
2121 if (key_name == NULL
2125 memset(buffer, 0, sizeof(buffer));
2126 params[0] = OSSL_PARAM_construct_BN(key_name, buffer, sizeof(buffer));
2127 params[1] = OSSL_PARAM_construct_end();
2128 if (!EVP_PKEY_get_params(pkey, params)) {
2129 if (!OSSL_PARAM_modified(params) || params[0].return_size == 0)
2131 buf_sz = params[0].return_size;
2133 * If it failed because the buffer was too small then allocate the
2134 * required buffer size and retry.
2136 buf = OPENSSL_zalloc(buf_sz);
2139 params[0].data = buf;
2140 params[0].data_size = buf_sz;
2142 if (!EVP_PKEY_get_params(pkey, params))
2145 /* Fail if the param was not found */
2146 if (!OSSL_PARAM_modified(params))
2148 ret = OSSL_PARAM_get_BN(params, bn);
2154 int EVP_PKEY_get_octet_string_param(const EVP_PKEY *pkey, const char *key_name,
2155 unsigned char *buf, size_t max_buf_sz,
2158 OSSL_PARAM params[2];
2159 int ret1 = 0, ret2 = 0;
2161 if (key_name == NULL)
2164 params[0] = OSSL_PARAM_construct_octet_string(key_name, buf, max_buf_sz);
2165 params[1] = OSSL_PARAM_construct_end();
2166 if ((ret1 = EVP_PKEY_get_params(pkey, params)))
2167 ret2 = OSSL_PARAM_modified(params);
2168 if (ret2 && out_len != NULL)
2169 *out_len = params[0].return_size;
2170 return ret1 && ret2;
2173 int EVP_PKEY_get_utf8_string_param(const EVP_PKEY *pkey, const char *key_name,
2174 char *str, size_t max_buf_sz,
2177 OSSL_PARAM params[2];
2178 int ret1 = 0, ret2 = 0;
2180 if (key_name == NULL)
2183 params[0] = OSSL_PARAM_construct_utf8_string(key_name, str, max_buf_sz);
2184 params[1] = OSSL_PARAM_construct_end();
2185 if ((ret1 = EVP_PKEY_get_params(pkey, params)))
2186 ret2 = OSSL_PARAM_modified(params);
2187 if (ret2 && out_len != NULL)
2188 *out_len = params[0].return_size;
2190 if (ret2 && params[0].return_size == max_buf_sz)
2191 /* There was no space for a NUL byte */
2193 /* Add a terminating NUL byte for good measure */
2194 if (ret2 && str != NULL)
2195 str[params[0].return_size] = '\0';
2197 return ret1 && ret2;
2200 int EVP_PKEY_get_int_param(const EVP_PKEY *pkey, const char *key_name,
2203 OSSL_PARAM params[2];
2205 if (key_name == NULL)
2208 params[0] = OSSL_PARAM_construct_int(key_name, out);
2209 params[1] = OSSL_PARAM_construct_end();
2210 return EVP_PKEY_get_params(pkey, params)
2211 && OSSL_PARAM_modified(params);
2214 int EVP_PKEY_get_size_t_param(const EVP_PKEY *pkey, const char *key_name,
2217 OSSL_PARAM params[2];
2219 if (key_name == NULL)
2222 params[0] = OSSL_PARAM_construct_size_t(key_name, out);
2223 params[1] = OSSL_PARAM_construct_end();
2224 return EVP_PKEY_get_params(pkey, params)
2225 && OSSL_PARAM_modified(params);
2228 int EVP_PKEY_set_int_param(EVP_PKEY *pkey, const char *key_name, int in)
2230 OSSL_PARAM params[2];
2232 if (key_name == NULL)
2235 params[0] = OSSL_PARAM_construct_int(key_name, &in);
2236 params[1] = OSSL_PARAM_construct_end();
2237 return EVP_PKEY_set_params(pkey, params);
2240 int EVP_PKEY_set_size_t_param(EVP_PKEY *pkey, const char *key_name, size_t in)
2242 OSSL_PARAM params[2];
2244 if (key_name == NULL)
2247 params[0] = OSSL_PARAM_construct_size_t(key_name, &in);
2248 params[1] = OSSL_PARAM_construct_end();
2249 return EVP_PKEY_set_params(pkey, params);
2252 int EVP_PKEY_set_bn_param(EVP_PKEY *pkey, const char *key_name,
2255 OSSL_PARAM params[2];
2256 unsigned char buffer[2048];
2259 if (key_name == NULL
2262 || !evp_pkey_is_assigned(pkey))
2265 bsize = BN_num_bytes(bn);
2266 if (!ossl_assert(bsize <= (int)sizeof(buffer)))
2269 if (BN_bn2nativepad(bn, buffer, bsize) < 0)
2271 params[0] = OSSL_PARAM_construct_BN(key_name, buffer, bsize);
2272 params[1] = OSSL_PARAM_construct_end();
2273 return EVP_PKEY_set_params(pkey, params);
2276 int EVP_PKEY_set_utf8_string_param(EVP_PKEY *pkey, const char *key_name,
2279 OSSL_PARAM params[2];
2281 if (key_name == NULL)
2284 params[0] = OSSL_PARAM_construct_utf8_string(key_name, (char *)str, 0);
2285 params[1] = OSSL_PARAM_construct_end();
2286 return EVP_PKEY_set_params(pkey, params);
2289 int EVP_PKEY_set_octet_string_param(EVP_PKEY *pkey, const char *key_name,
2290 const unsigned char *buf, size_t bsize)
2292 OSSL_PARAM params[2];
2294 if (key_name == NULL)
2297 params[0] = OSSL_PARAM_construct_octet_string(key_name,
2298 (unsigned char *)buf, bsize);
2299 params[1] = OSSL_PARAM_construct_end();
2300 return EVP_PKEY_set_params(pkey, params);
2303 const OSSL_PARAM *EVP_PKEY_settable_params(const EVP_PKEY *pkey)
2305 return (pkey != NULL && evp_pkey_is_provided(pkey))
2306 ? EVP_KEYMGMT_settable_params(pkey->keymgmt)
2310 int EVP_PKEY_set_params(EVP_PKEY *pkey, OSSL_PARAM params[])
2313 if (evp_pkey_is_provided(pkey)) {
2315 return evp_keymgmt_set_params(pkey->keymgmt, pkey->keydata, params);
2319 * We will hopefully never find the need to set individual data in
2320 * EVP_PKEYs with a legacy internal key, but we can't be entirely
2321 * sure. This bit of code can be enabled if we find the need. If
2322 * not, it can safely be removed when #legacy support is removed.
2325 else if (evp_pkey_is_legacy(pkey)) {
2326 return evp_pkey_set_params_to_ctrl(pkey, params);
2331 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY);
2335 const OSSL_PARAM *EVP_PKEY_gettable_params(const EVP_PKEY *pkey)
2337 return (pkey != NULL && evp_pkey_is_provided(pkey))
2338 ? EVP_KEYMGMT_gettable_params(pkey->keymgmt)
2342 int EVP_PKEY_get_params(const EVP_PKEY *pkey, OSSL_PARAM params[])
2345 if (evp_pkey_is_provided(pkey))
2346 return evp_keymgmt_get_params(pkey->keymgmt, pkey->keydata, params);
2348 else if (evp_pkey_is_legacy(pkey))
2349 return evp_pkey_get_params_to_ctrl(pkey, params);
2352 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY);
2357 int EVP_PKEY_get_ec_point_conv_form(const EVP_PKEY *pkey)
2365 if (pkey->keymgmt == NULL
2366 || pkey->keydata == NULL) {
2367 # ifndef OPENSSL_NO_EC
2368 /* Might work through the legacy route */
2369 const EC_KEY *ec = EVP_PKEY_get0_EC_KEY(pkey);
2374 return EC_KEY_get_conv_form(ec);
2380 if (!EVP_PKEY_get_utf8_string_param(pkey,
2381 OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT,
2382 name, sizeof(name), &name_len))
2385 if (strcmp(name, "uncompressed") == 0)
2386 return POINT_CONVERSION_UNCOMPRESSED;
2388 if (strcmp(name, "compressed") == 0)
2389 return POINT_CONVERSION_COMPRESSED;
2391 if (strcmp(name, "hybrid") == 0)
2392 return POINT_CONVERSION_HYBRID;
2397 int EVP_PKEY_get_field_type(const EVP_PKEY *pkey)
2405 if (pkey->keymgmt == NULL
2406 || pkey->keydata == NULL) {
2407 # ifndef OPENSSL_NO_EC
2408 /* Might work through the legacy route */
2409 const EC_KEY *ec = EVP_PKEY_get0_EC_KEY(pkey);
2410 const EC_GROUP *grp;
2414 grp = EC_KEY_get0_group(ec);
2418 return EC_GROUP_get_field_type(grp);
2424 if (!EVP_PKEY_get_utf8_string_param(pkey, OSSL_PKEY_PARAM_EC_FIELD_TYPE,
2425 fstr, sizeof(fstr), &fstrlen))
2428 if (strcmp(fstr, SN_X9_62_prime_field) == 0)
2429 return NID_X9_62_prime_field;
2430 else if (strcmp(fstr, SN_X9_62_characteristic_two_field))
2431 return NID_X9_62_characteristic_two_field;