2 * Copyright 1995-2020 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"
17 #include "internal/cryptlib.h"
18 #include "internal/refcount.h"
19 #include <openssl/bn.h>
20 #include <openssl/err.h>
21 #include <openssl/objects.h>
22 #include <openssl/evp.h>
23 #include <openssl/x509.h>
24 #include <openssl/rsa.h>
25 #include <openssl/dsa.h>
26 #include <openssl/dh.h>
27 #include <openssl/ec.h>
28 #include <openssl/cmac.h>
29 #include <openssl/engine.h>
30 #include <openssl/params.h>
31 #include <openssl/param_build.h>
32 #include <openssl/encoder.h>
33 #include <openssl/core_names.h>
35 #include "crypto/asn1.h"
36 #include "crypto/evp.h"
37 #include "crypto/ecx.h"
38 #include "internal/evp.h"
39 #include "internal/provider.h"
40 #include "evp_local.h"
41 DEFINE_STACK_OF(X509_ATTRIBUTE)
43 #include "crypto/ec.h"
45 /* TODO remove this when the EVP_PKEY_is_a() #legacy support hack is removed */
46 #include "e_os.h" /* strcasecmp on Windows */
48 static int pkey_set_type(EVP_PKEY *pkey, ENGINE *e, int type, const char *str,
49 int len, EVP_KEYMGMT *keymgmt);
50 static void evp_pkey_free_it(EVP_PKEY *key);
54 /* The type of parameters selected in key parameter functions */
55 # define SELECT_PARAMETERS OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS
57 int EVP_PKEY_bits(const EVP_PKEY *pkey)
60 if (pkey->ameth == NULL)
61 return pkey->cache.bits;
62 else if (pkey->ameth->pkey_bits)
63 return pkey->ameth->pkey_bits(pkey);
68 int EVP_PKEY_security_bits(const EVP_PKEY *pkey)
72 if (pkey->ameth == NULL)
73 return pkey->cache.security_bits;
74 if (pkey->ameth->pkey_security_bits == NULL)
76 return pkey->ameth->pkey_security_bits(pkey);
79 int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
81 # ifndef OPENSSL_NO_DSA
82 if (pkey->type == EVP_PKEY_DSA) {
83 int ret = pkey->save_parameters;
86 pkey->save_parameters = mode;
90 # ifndef OPENSSL_NO_EC
91 if (pkey->type == EVP_PKEY_EC) {
92 int ret = pkey->save_parameters;
95 pkey->save_parameters = mode;
102 int EVP_PKEY_set_ex_data(EVP_PKEY *key, int idx, void *arg)
104 return CRYPTO_set_ex_data(&key->ex_data, idx, arg);
107 void *EVP_PKEY_get_ex_data(const EVP_PKEY *key, int idx)
109 return CRYPTO_get_ex_data(&key->ex_data, idx);
112 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
115 * TODO: clean up legacy stuff from this function when legacy support
120 * If |to| is a legacy key and |from| isn't, we must downgrade |from|.
121 * If that fails, this function fails.
123 if (evp_pkey_is_legacy(to) && evp_pkey_is_provided(from))
124 if (!evp_pkey_downgrade((EVP_PKEY *)from))
128 * Make sure |to| is typed. Content is less important at this early
131 * 1. If |to| is untyped, assign |from|'s key type to it.
132 * 2. If |to| contains a legacy key, compare its |type| to |from|'s.
133 * (|from| was already downgraded above)
135 * If |to| is a provided key, there's nothing more to do here, functions
136 * like evp_keymgmt_util_copy() and evp_pkey_export_to_provider() called
137 * further down help us find out if they are the same or not.
139 if (evp_pkey_is_blank(to)) {
140 if (evp_pkey_is_legacy(from)) {
141 if (EVP_PKEY_set_type(to, from->type) == 0)
144 if (EVP_PKEY_set_type_by_keymgmt(to, from->keymgmt) == 0)
147 } else if (evp_pkey_is_legacy(to)) {
148 if (to->type != from->type) {
149 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_KEY_TYPES);
154 if (EVP_PKEY_missing_parameters(from)) {
155 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS);
159 if (!EVP_PKEY_missing_parameters(to)) {
160 if (EVP_PKEY_parameters_eq(to, from) == 1)
162 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_PARAMETERS);
166 /* For purely provided keys, we just call the keymgmt utility */
167 if (to->keymgmt != NULL && from->keymgmt != NULL)
168 return evp_keymgmt_util_copy(to, (EVP_PKEY *)from, SELECT_PARAMETERS);
171 * If |to| is provided, we know that |from| is legacy at this point.
172 * Try exporting |from| to |to|'s keymgmt, then use evp_keymgmt_copy()
173 * to copy the appropriate data to |to|'s keydata.
175 if (to->keymgmt != NULL) {
176 EVP_KEYMGMT *to_keymgmt = to->keymgmt;
178 evp_pkey_export_to_provider((EVP_PKEY *)from, NULL, &to_keymgmt,
182 * If we get a NULL, it could be an internal error, or it could be
183 * that there's a key mismatch. We're pretending the latter...
185 if (from_keydata == NULL) {
186 ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_KEY_TYPES);
189 return evp_keymgmt_copy(to->keymgmt, to->keydata, from_keydata,
193 /* Both keys are legacy */
194 if (from->ameth != NULL && from->ameth->param_copy != NULL)
195 return from->ameth->param_copy(to, from);
200 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
203 if (pkey->keymgmt != NULL)
204 return !evp_keymgmt_util_has((EVP_PKEY *)pkey, SELECT_PARAMETERS);
205 else if (pkey->ameth != NULL && pkey->ameth->param_missing != NULL)
206 return pkey->ameth->param_missing(pkey);
212 * This function is called for any mixture of keys except pure legacy pair.
213 * TODO When legacy keys are gone, we replace a call to this functions with
214 * a call to evp_keymgmt_util_match().
216 static int evp_pkey_cmp_any(const EVP_PKEY *a, const EVP_PKEY *b,
219 EVP_KEYMGMT *keymgmt1 = NULL, *keymgmt2 = NULL;
220 void *keydata1 = NULL, *keydata2 = NULL, *tmp_keydata = NULL;
222 /* If none of them are provided, this function shouldn't have been called */
223 if (!ossl_assert(evp_pkey_is_provided(a) || evp_pkey_is_provided(b)))
226 /* For purely provided keys, we just call the keymgmt utility */
227 if (evp_pkey_is_provided(a) && evp_pkey_is_provided(b))
228 return evp_keymgmt_util_match((EVP_PKEY *)a, (EVP_PKEY *)b, selection);
231 * At this point, one of them is provided, the other not. This allows
232 * us to compare types using legacy NIDs.
234 if (evp_pkey_is_legacy(a)
235 && !EVP_KEYMGMT_is_a(b->keymgmt, OBJ_nid2sn(a->type)))
236 return -1; /* not the same key type */
237 if (evp_pkey_is_legacy(b)
238 && !EVP_KEYMGMT_is_a(a->keymgmt, OBJ_nid2sn(b->type)))
239 return -1; /* not the same key type */
242 * We've determined that they both are the same keytype, so the next
243 * step is to do a bit of cross export to ensure we have keydata for
244 * both keys in the same keymgmt.
246 keymgmt1 = a->keymgmt;
247 keydata1 = a->keydata;
248 keymgmt2 = b->keymgmt;
249 keydata2 = b->keydata;
251 if (keymgmt2 != NULL && keymgmt2->match != NULL) {
253 evp_pkey_export_to_provider((EVP_PKEY *)a, NULL, &keymgmt2, NULL);
254 if (tmp_keydata != NULL) {
256 keydata1 = tmp_keydata;
259 if (tmp_keydata == NULL && keymgmt1 != NULL && keymgmt1->match != NULL) {
261 evp_pkey_export_to_provider((EVP_PKEY *)b, NULL, &keymgmt1, NULL);
262 if (tmp_keydata != NULL) {
264 keydata2 = tmp_keydata;
268 /* If we still don't have matching keymgmt implementations, we give up */
269 if (keymgmt1 != keymgmt2)
272 /* If the keymgmt implementations are NULL, the export failed */
273 if (keymgmt1 == NULL)
276 return evp_keymgmt_match(keymgmt1, keydata1, keydata2, selection);
279 #ifndef OPENSSL_NO_DEPRECATED_3_0
280 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
282 return EVP_PKEY_parameters_eq(a, b);
286 int EVP_PKEY_parameters_eq(const EVP_PKEY *a, const EVP_PKEY *b)
289 * TODO: clean up legacy stuff from this function when legacy support
293 if (a->keymgmt != NULL || b->keymgmt != NULL)
294 return evp_pkey_cmp_any(a, b, SELECT_PARAMETERS);
296 /* All legacy keys */
297 if (a->type != b->type)
299 if (a->ameth != NULL && a->ameth->param_cmp != NULL)
300 return a->ameth->param_cmp(a, b);
304 #ifndef OPENSSL_NO_DEPRECATED_3_0
305 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
307 return EVP_PKEY_eq(a, b);
311 int EVP_PKEY_eq(const EVP_PKEY *a, const EVP_PKEY *b)
314 * TODO: clean up legacy stuff from this function when legacy support
318 if (a->keymgmt != NULL || b->keymgmt != NULL)
319 return evp_pkey_cmp_any(a, b, (SELECT_PARAMETERS
320 | OSSL_KEYMGMT_SELECT_PUBLIC_KEY));
322 /* All legacy keys */
323 if (a->type != b->type)
326 if (a->ameth != NULL) {
328 /* Compare parameters if the algorithm has them */
329 if (a->ameth->param_cmp != NULL) {
330 ret = a->ameth->param_cmp(a, b);
335 if (a->ameth->pub_cmp != NULL)
336 return a->ameth->pub_cmp(a, b);
343 static EVP_PKEY *new_raw_key_int(OPENSSL_CTX *libctx,
348 const unsigned char *key,
352 EVP_PKEY *pkey = NULL;
353 EVP_PKEY_CTX *ctx = NULL;
354 const EVP_PKEY_ASN1_METHOD *ameth = NULL;
357 # ifndef OPENSSL_NO_ENGINE
358 /* Check if there is an Engine for this type */
363 ameth = EVP_PKEY_asn1_find_str(&tmpe, strtype, -1);
364 else if (nidtype != EVP_PKEY_NONE)
365 ameth = EVP_PKEY_asn1_find(&tmpe, nidtype);
367 /* If tmpe is NULL then no engine is claiming to support this type */
375 if (e == NULL && ameth == NULL) {
377 * No engine is claiming to support this type, so lets see if we have
380 ctx = EVP_PKEY_CTX_new_from_name(libctx,
381 strtype != NULL ? strtype
382 : OBJ_nid2sn(nidtype),
385 EVPerr(0, ERR_R_MALLOC_FAILURE);
388 /* May fail if no provider available */
390 if (EVP_PKEY_key_fromdata_init(ctx) == 1) {
391 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END };
393 ERR_clear_last_mark();
394 params[0] = OSSL_PARAM_construct_octet_string(
395 key_is_priv ? OSSL_PKEY_PARAM_PRIV_KEY
396 : OSSL_PKEY_PARAM_PUB_KEY,
399 if (EVP_PKEY_fromdata(ctx, &pkey, params) != 1) {
400 EVPerr(0, EVP_R_KEY_SETUP_FAILED);
404 EVP_PKEY_CTX_free(ctx);
409 /* else not supported so fallback to legacy */
412 /* Legacy code path */
414 pkey = EVP_PKEY_new();
416 EVPerr(0, ERR_R_MALLOC_FAILURE);
420 if (!pkey_set_type(pkey, e, nidtype, strtype, -1, NULL)) {
421 /* EVPerr already called */
425 if (!ossl_assert(pkey->ameth != NULL))
429 if (pkey->ameth->set_priv_key == NULL) {
430 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
434 if (!pkey->ameth->set_priv_key(pkey, key, len)) {
435 EVPerr(0, EVP_R_KEY_SETUP_FAILED);
439 if (pkey->ameth->set_pub_key == NULL) {
440 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
444 if (!pkey->ameth->set_pub_key(pkey, key, len)) {
445 EVPerr(0, EVP_R_KEY_SETUP_FAILED);
456 EVP_PKEY_CTX_free(ctx);
460 EVP_PKEY *EVP_PKEY_new_raw_private_key_with_libctx(OPENSSL_CTX *libctx,
463 const unsigned char *priv,
466 return new_raw_key_int(libctx, keytype, propq, EVP_PKEY_NONE, NULL, priv,
470 EVP_PKEY *EVP_PKEY_new_raw_private_key(int type, ENGINE *e,
471 const unsigned char *priv,
474 return new_raw_key_int(NULL, NULL, NULL, type, e, priv, len, 1);
477 EVP_PKEY *EVP_PKEY_new_raw_public_key_with_libctx(OPENSSL_CTX *libctx,
480 const unsigned char *pub,
483 return new_raw_key_int(libctx, keytype, propq, EVP_PKEY_NONE, NULL, pub,
487 EVP_PKEY *EVP_PKEY_new_raw_public_key(int type, ENGINE *e,
488 const unsigned char *pub,
491 return new_raw_key_int(NULL, NULL, NULL, type, e, pub, len, 0);
494 struct raw_key_details_st
501 static OSSL_CALLBACK get_raw_key_details;
502 static int get_raw_key_details(const OSSL_PARAM params[], void *arg)
504 const OSSL_PARAM *p = NULL;
505 struct raw_key_details_st *raw_key = arg;
507 if (raw_key->selection == OSSL_KEYMGMT_SELECT_PRIVATE_KEY) {
508 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY))
510 return OSSL_PARAM_get_octet_string(p, (void **)raw_key->key,
511 SIZE_MAX, raw_key->len);
512 } else if (raw_key->selection == OSSL_KEYMGMT_SELECT_PUBLIC_KEY) {
513 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY))
515 return OSSL_PARAM_get_octet_string(p, (void **)raw_key->key,
516 SIZE_MAX, raw_key->len);
522 int EVP_PKEY_get_raw_private_key(const EVP_PKEY *pkey, unsigned char *priv,
525 if (pkey->keymgmt != NULL) {
526 struct raw_key_details_st raw_key;
528 raw_key.key = priv == NULL ? NULL : &priv;
530 raw_key.selection = OSSL_KEYMGMT_SELECT_PRIVATE_KEY;
532 return evp_keymgmt_export(pkey->keymgmt, pkey->keydata,
533 OSSL_KEYMGMT_SELECT_PRIVATE_KEY,
534 get_raw_key_details, &raw_key);
537 if (pkey->ameth == NULL) {
538 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
542 if (pkey->ameth->get_priv_key == NULL) {
543 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
547 if (!pkey->ameth->get_priv_key(pkey, priv, len)) {
548 EVPerr(0, EVP_R_GET_RAW_KEY_FAILED);
555 int EVP_PKEY_get_raw_public_key(const EVP_PKEY *pkey, unsigned char *pub,
558 if (pkey->keymgmt != NULL) {
559 struct raw_key_details_st raw_key;
561 raw_key.key = pub == NULL ? NULL : &pub;
563 raw_key.selection = OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
565 return evp_keymgmt_export(pkey->keymgmt, pkey->keydata,
566 OSSL_KEYMGMT_SELECT_PUBLIC_KEY,
567 get_raw_key_details, &raw_key);
570 if (pkey->ameth == NULL) {
571 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
575 if (pkey->ameth->get_pub_key == NULL) {
576 EVPerr(EVP_F_EVP_PKEY_GET_RAW_PUBLIC_KEY,
577 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
581 if (!pkey->ameth->get_pub_key(pkey, pub, len)) {
582 EVPerr(EVP_F_EVP_PKEY_GET_RAW_PUBLIC_KEY, EVP_R_GET_RAW_KEY_FAILED);
589 static EVP_PKEY *new_cmac_key_int(const unsigned char *priv, size_t len,
590 const char *cipher_name,
591 const EVP_CIPHER *cipher, OPENSSL_CTX *libctx,
592 const char *propq, ENGINE *e)
594 # ifndef OPENSSL_NO_CMAC
595 # ifndef OPENSSL_NO_ENGINE
596 const char *engine_id = e != NULL ? ENGINE_get_id(e) : NULL;
598 OSSL_PARAM params[5], *p = params;
599 EVP_PKEY *pkey = NULL;
603 cipher_name = EVP_CIPHER_name(cipher);
605 if (cipher_name == NULL) {
606 EVPerr(0, EVP_R_KEY_SETUP_FAILED);
610 ctx = EVP_PKEY_CTX_new_from_name(libctx, "CMAC", propq);
612 EVPerr(0, ERR_R_MALLOC_FAILURE);
616 if (!EVP_PKEY_key_fromdata_init(ctx)) {
617 EVPerr(0, EVP_R_KEY_SETUP_FAILED);
621 *p++ = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_PRIV_KEY,
623 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_CIPHER,
624 (char *)cipher_name, 0);
626 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_PROPERTIES,
628 # ifndef OPENSSL_NO_ENGINE
629 if (engine_id != NULL)
630 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_ENGINE,
631 (char *)engine_id, 0);
633 *p = OSSL_PARAM_construct_end();
635 if (!EVP_PKEY_fromdata(ctx, &pkey, params)) {
636 EVPerr(0, EVP_R_KEY_SETUP_FAILED);
641 EVP_PKEY_CTX_free(ctx);
645 EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
650 EVP_PKEY *EVP_PKEY_new_CMAC_key_with_libctx(const unsigned char *priv,
652 const char *cipher_name,
656 return new_cmac_key_int(priv, len, cipher_name, NULL, libctx, propq, NULL);
659 EVP_PKEY *EVP_PKEY_new_CMAC_key(ENGINE *e, const unsigned char *priv,
660 size_t len, const EVP_CIPHER *cipher)
662 return new_cmac_key_int(priv, len, NULL, cipher, NULL, NULL, e);
665 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
667 return pkey_set_type(pkey, NULL, type, NULL, -1, NULL);
670 int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
672 return pkey_set_type(pkey, NULL, EVP_PKEY_NONE, str, len, NULL);
675 int EVP_PKEY_set_alias_type(EVP_PKEY *pkey, int type)
677 if (pkey->type == type) {
678 return 1; /* it already is that type */
682 * The application is requesting to alias this to a different pkey type,
683 * but not one that resolves to the base type.
685 if (EVP_PKEY_type(type) != EVP_PKEY_base_id(pkey)) {
686 EVPerr(EVP_F_EVP_PKEY_SET_ALIAS_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
694 # ifndef OPENSSL_NO_ENGINE
695 int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *e)
698 if (!ENGINE_init(e)) {
699 EVPerr(EVP_F_EVP_PKEY_SET1_ENGINE, ERR_R_ENGINE_LIB);
702 if (ENGINE_get_pkey_meth(e, pkey->type) == NULL) {
704 EVPerr(EVP_F_EVP_PKEY_SET1_ENGINE, EVP_R_UNSUPPORTED_ALGORITHM);
708 ENGINE_finish(pkey->pmeth_engine);
709 pkey->pmeth_engine = e;
713 ENGINE *EVP_PKEY_get0_engine(const EVP_PKEY *pkey)
718 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
722 #ifndef OPENSSL_NO_EC
723 if (EVP_PKEY_type(type) == EVP_PKEY_EC) {
724 const EC_GROUP *group = EC_KEY_get0_group(key);
726 if (group != NULL && EC_GROUP_get_curve_name(group) == NID_sm2)
727 alias = EVP_PKEY_SM2;
731 if (pkey == NULL || !EVP_PKEY_set_type(pkey, type))
733 if (!EVP_PKEY_set_alias_type(pkey, alias))
735 pkey->pkey.ptr = key;
736 return (key != NULL);
739 void *EVP_PKEY_get0(const EVP_PKEY *pkey)
743 if (!evp_pkey_downgrade((EVP_PKEY *)pkey)) {
744 ERR_raise(ERR_LIB_EVP, EVP_R_INACCESSIBLE_KEY);
747 return pkey->pkey.ptr;
750 const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len)
752 ASN1_OCTET_STRING *os = NULL;
753 if (pkey->type != EVP_PKEY_HMAC) {
754 EVPerr(EVP_F_EVP_PKEY_GET0_HMAC, EVP_R_EXPECTING_AN_HMAC_KEY);
757 os = EVP_PKEY_get0(pkey);
762 # ifndef OPENSSL_NO_POLY1305
763 const unsigned char *EVP_PKEY_get0_poly1305(const EVP_PKEY *pkey, size_t *len)
765 ASN1_OCTET_STRING *os = NULL;
766 if (pkey->type != EVP_PKEY_POLY1305) {
767 EVPerr(EVP_F_EVP_PKEY_GET0_POLY1305, EVP_R_EXPECTING_A_POLY1305_KEY);
770 os = EVP_PKEY_get0(pkey);
776 # ifndef OPENSSL_NO_SIPHASH
777 const unsigned char *EVP_PKEY_get0_siphash(const EVP_PKEY *pkey, size_t *len)
779 ASN1_OCTET_STRING *os = NULL;
781 if (pkey->type != EVP_PKEY_SIPHASH) {
782 EVPerr(EVP_F_EVP_PKEY_GET0_SIPHASH, EVP_R_EXPECTING_A_SIPHASH_KEY);
785 os = EVP_PKEY_get0(pkey);
791 # ifndef OPENSSL_NO_RSA
792 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
794 int ret = EVP_PKEY_assign_RSA(pkey, key);
800 RSA *EVP_PKEY_get0_RSA(const EVP_PKEY *pkey)
802 if (!evp_pkey_downgrade((EVP_PKEY *)pkey)) {
803 ERR_raise(ERR_LIB_EVP, EVP_R_INACCESSIBLE_KEY);
806 if (pkey->type != EVP_PKEY_RSA && pkey->type != EVP_PKEY_RSA_PSS) {
807 EVPerr(EVP_F_EVP_PKEY_GET0_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
810 return pkey->pkey.rsa;
813 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
815 RSA *ret = EVP_PKEY_get0_RSA(pkey);
822 # ifndef OPENSSL_NO_DSA
823 DSA *EVP_PKEY_get0_DSA(const EVP_PKEY *pkey)
825 if (!evp_pkey_downgrade((EVP_PKEY *)pkey)) {
826 ERR_raise(ERR_LIB_EVP, EVP_R_INACCESSIBLE_KEY);
829 if (pkey->type != EVP_PKEY_DSA) {
830 EVPerr(EVP_F_EVP_PKEY_GET0_DSA, EVP_R_EXPECTING_A_DSA_KEY);
833 return pkey->pkey.dsa;
836 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
838 int ret = EVP_PKEY_assign_DSA(pkey, key);
843 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
845 DSA *ret = EVP_PKEY_get0_DSA(pkey);
850 # endif /* OPENSSL_NO_DSA */
851 #endif /* FIPS_MODULE */
854 # ifndef OPENSSL_NO_EC
855 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
857 int ret = EVP_PKEY_assign_EC_KEY(pkey, key);
863 EC_KEY *EVP_PKEY_get0_EC_KEY(const EVP_PKEY *pkey)
865 if (!evp_pkey_downgrade((EVP_PKEY *)pkey)) {
866 ERR_raise(ERR_LIB_EVP, EVP_R_INACCESSIBLE_KEY);
869 if (EVP_PKEY_base_id(pkey) != EVP_PKEY_EC) {
870 EVPerr(EVP_F_EVP_PKEY_GET0_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
873 return pkey->pkey.ec;
876 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
878 EC_KEY *ret = EVP_PKEY_get0_EC_KEY(pkey);
884 static int EVP_PKEY_set1_ECX_KEY(EVP_PKEY *pkey, int type, ECX_KEY *key)
886 int ret = EVP_PKEY_assign(pkey, type, key);
892 static ECX_KEY *EVP_PKEY_get0_ECX_KEY(const EVP_PKEY *pkey, int type)
894 if (!evp_pkey_downgrade((EVP_PKEY *)pkey)) {
895 ERR_raise(ERR_LIB_EVP, EVP_R_INACCESSIBLE_KEY);
898 if (EVP_PKEY_base_id(pkey) != type) {
899 ERR_raise(ERR_LIB_EVP, EVP_R_EXPECTING_A_ECX_KEY);
902 return pkey->pkey.ecx;
905 static ECX_KEY *EVP_PKEY_get1_ECX_KEY(EVP_PKEY *pkey, int type)
907 ECX_KEY *ret = EVP_PKEY_get0_ECX_KEY(pkey, type);
913 # define IMPLEMENT_ECX_VARIANT(NAME) \
914 int EVP_PKEY_set1_##NAME(EVP_PKEY *pkey, ECX_KEY *key) \
916 return EVP_PKEY_set1_ECX_KEY(pkey, EVP_PKEY_##NAME, key); \
918 ECX_KEY *EVP_PKEY_get0_##NAME(const EVP_PKEY *pkey) \
920 return EVP_PKEY_get0_ECX_KEY(pkey, EVP_PKEY_##NAME); \
922 ECX_KEY *EVP_PKEY_get1_##NAME(EVP_PKEY *pkey) \
924 return EVP_PKEY_get1_ECX_KEY(pkey, EVP_PKEY_##NAME); \
926 IMPLEMENT_ECX_VARIANT(X25519)
927 IMPLEMENT_ECX_VARIANT(X448)
928 IMPLEMENT_ECX_VARIANT(ED25519)
929 IMPLEMENT_ECX_VARIANT(ED448)
933 # ifndef OPENSSL_NO_DH
935 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
937 int type = DH_get0_q(key) == NULL ? EVP_PKEY_DH : EVP_PKEY_DHX;
938 int ret = EVP_PKEY_assign(pkey, type, key);
945 DH *EVP_PKEY_get0_DH(const EVP_PKEY *pkey)
947 if (!evp_pkey_downgrade((EVP_PKEY *)pkey)) {
948 ERR_raise(ERR_LIB_EVP, EVP_R_INACCESSIBLE_KEY);
951 if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) {
952 EVPerr(EVP_F_EVP_PKEY_GET0_DH, EVP_R_EXPECTING_A_DH_KEY);
955 return pkey->pkey.dh;
958 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
960 DH *ret = EVP_PKEY_get0_DH(pkey);
967 int EVP_PKEY_type(int type)
970 const EVP_PKEY_ASN1_METHOD *ameth;
972 ameth = EVP_PKEY_asn1_find(&e, type);
974 ret = ameth->pkey_id;
977 # ifndef OPENSSL_NO_ENGINE
983 int EVP_PKEY_id(const EVP_PKEY *pkey)
988 int EVP_PKEY_base_id(const EVP_PKEY *pkey)
990 return EVP_PKEY_type(pkey->type);
993 int EVP_PKEY_is_a(const EVP_PKEY *pkey, const char *name)
996 if (pkey->keymgmt == NULL) {
998 * These hard coded cases are pure hackery to get around the fact
999 * that names in crypto/objects/objects.txt are a mess. There is
1000 * no "EC", and "RSA" leads to the NID for 2.5.8.1.1, an OID that's
1001 * fallen out in favor of { pkcs-1 1 }, i.e. 1.2.840.113549.1.1.1,
1002 * the NID of which is used for EVP_PKEY_RSA. Strangely enough,
1003 * "DSA" is accurate... but still, better be safe and hard-code
1004 * names that we know.
1005 * TODO Clean this away along with all other #legacy support.
1009 if (strcasecmp(name, "RSA") == 0)
1010 type = EVP_PKEY_RSA;
1011 else if (strcasecmp(name, "RSA-PSS") == 0)
1012 type = EVP_PKEY_RSA_PSS;
1013 #ifndef OPENSSL_NO_EC
1014 else if (strcasecmp(name, "EC") == 0)
1016 else if (strcasecmp(name, "ED25519") == 0)
1017 type = EVP_PKEY_ED25519;
1018 else if (strcasecmp(name, "ED448") == 0)
1019 type = EVP_PKEY_ED448;
1020 else if (strcasecmp(name, "X25519") == 0)
1021 type = EVP_PKEY_X25519;
1022 else if (strcasecmp(name, "X448") == 0)
1023 type = EVP_PKEY_X448;
1025 #ifndef OPENSSL_NO_DH
1026 else if (strcasecmp(name, "DH") == 0)
1028 else if (strcasecmp(name, "X9.42 DH") == 0)
1029 type = EVP_PKEY_DHX;
1031 #ifndef OPENSSL_NO_DSA
1032 else if (strcasecmp(name, "DSA") == 0)
1033 type = EVP_PKEY_DSA;
1036 type = EVP_PKEY_type(OBJ_sn2nid(name));
1037 return EVP_PKEY_type(pkey->type) == type;
1040 return EVP_KEYMGMT_is_a(pkey->keymgmt, name);
1043 int EVP_PKEY_can_sign(const EVP_PKEY *pkey)
1045 if (pkey->keymgmt == NULL) {
1046 switch (EVP_PKEY_base_id(pkey)) {
1049 #ifndef OPENSSL_NO_DSA
1053 #ifndef OPENSSL_NO_EC
1054 case EVP_PKEY_ED25519:
1055 case EVP_PKEY_ED448:
1057 case EVP_PKEY_EC: /* Including SM2 */
1058 return EC_KEY_can_sign(pkey->pkey.ec);
1064 const OSSL_PROVIDER *prov = EVP_KEYMGMT_provider(pkey->keymgmt);
1065 OPENSSL_CTX *libctx = ossl_provider_library_context(prov);
1066 const char *supported_sig =
1067 pkey->keymgmt->query_operation_name != NULL
1068 ? pkey->keymgmt->query_operation_name(OSSL_OP_SIGNATURE)
1069 : evp_first_name(prov, pkey->keymgmt->name_id);
1070 EVP_SIGNATURE *signature = NULL;
1072 signature = EVP_SIGNATURE_fetch(libctx, supported_sig, NULL);
1073 if (signature != NULL) {
1074 EVP_SIGNATURE_free(signature);
1081 #ifndef OPENSSL_NO_EC
1083 * TODO rewrite when we have proper data extraction functions
1084 * Note: an octet pointer would be desirable!
1086 static OSSL_CALLBACK get_ec_curve_name_cb;
1087 static int get_ec_curve_name_cb(const OSSL_PARAM params[], void *arg)
1089 const OSSL_PARAM *p = NULL;
1091 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_GROUP_NAME)) != NULL)
1092 return OSSL_PARAM_get_utf8_string(p, arg, 0);
1094 /* If there is no curve name, this is not an EC key */
1098 int evp_pkey_get_EC_KEY_curve_nid(const EVP_PKEY *pkey)
1100 int ret = NID_undef;
1102 if (pkey->keymgmt == NULL) {
1103 if (EVP_PKEY_base_id(pkey) == EVP_PKEY_EC) {
1104 EC_KEY *ec = EVP_PKEY_get0_EC_KEY(pkey);
1106 ret = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
1108 } else if (EVP_PKEY_is_a(pkey, "EC") || EVP_PKEY_is_a(pkey, "SM2")) {
1109 char *curve_name = NULL;
1111 ret = evp_keymgmt_export(pkey->keymgmt, pkey->keydata,
1112 OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS,
1113 get_ec_curve_name_cb, &curve_name);
1115 ret = ec_curve_name2nid(curve_name);
1116 OPENSSL_free(curve_name);
1123 static int print_reset_indent(BIO **out, int pop_f_prefix, long saved_indent)
1125 BIO_set_indent(*out, saved_indent);
1127 BIO *next = BIO_pop(*out);
1135 static int print_set_indent(BIO **out, int *pop_f_prefix, long *saved_indent,
1141 long i = BIO_get_indent(*out);
1143 *saved_indent = (i < 0 ? 0 : i);
1144 if (BIO_set_indent(*out, indent) <= 0) {
1145 if ((*out = BIO_push(BIO_new(BIO_f_prefix()), *out)) == NULL)
1149 if (BIO_set_indent(*out, indent) <= 0) {
1150 print_reset_indent(out, *pop_f_prefix, *saved_indent);
1157 static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
1160 return BIO_indent(out, indent, 128)
1161 && BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
1162 kstr, OBJ_nid2ln(pkey->type)) > 0;
1165 static int print_pkey(const EVP_PKEY *pkey, BIO *out, int indent,
1166 const char *propquery /* For provided encoding */,
1167 int (*legacy_print)(BIO *out, const EVP_PKEY *pkey,
1168 int indent, ASN1_PCTX *pctx),
1169 ASN1_PCTX *legacy_pctx /* For legacy print */)
1173 OSSL_ENCODER_CTX *ctx = NULL;
1174 int ret = -2; /* default to unsupported */
1176 if (!print_set_indent(&out, &pop_f_prefix, &saved_indent, indent))
1179 ctx = OSSL_ENCODER_CTX_new_by_EVP_PKEY(pkey, propquery);
1180 if (OSSL_ENCODER_CTX_get_encoder(ctx) != NULL)
1181 ret = OSSL_ENCODER_to_bio(ctx, out);
1182 OSSL_ENCODER_CTX_free(ctx);
1187 /* legacy fallback */
1188 if (legacy_print != NULL)
1189 ret = legacy_print(out, pkey, 0, legacy_pctx);
1191 ret = unsup_alg(out, pkey, 0, "Public Key");
1194 print_reset_indent(&out, pop_f_prefix, saved_indent);
1198 int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
1199 int indent, ASN1_PCTX *pctx)
1201 return print_pkey(pkey, out, indent, OSSL_ENCODER_PUBKEY_TO_TEXT_PQ,
1202 (pkey->ameth != NULL ? pkey->ameth->pub_print : NULL),
1206 int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
1207 int indent, ASN1_PCTX *pctx)
1209 return print_pkey(pkey, out, indent, OSSL_ENCODER_PrivateKey_TO_TEXT_PQ,
1210 (pkey->ameth != NULL ? pkey->ameth->priv_print : NULL),
1214 int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
1215 int indent, ASN1_PCTX *pctx)
1217 return print_pkey(pkey, out, indent, OSSL_ENCODER_Parameters_TO_TEXT_PQ,
1218 (pkey->ameth != NULL ? pkey->ameth->param_print : NULL),
1222 static int legacy_asn1_ctrl_to_param(EVP_PKEY *pkey, int op,
1223 int arg1, void *arg2)
1225 if (pkey->keymgmt == NULL)
1228 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
1230 char mdname[80] = "";
1231 int rv = EVP_PKEY_get_default_digest_name(pkey, mdname,
1237 nid = OBJ_sn2nid(mdname);
1238 if (nid == NID_undef)
1239 nid = OBJ_ln2nid(mdname);
1249 static int evp_pkey_asn1_ctrl(EVP_PKEY *pkey, int op, int arg1, void *arg2)
1251 if (pkey->ameth == NULL)
1252 return legacy_asn1_ctrl_to_param(pkey, op, arg1, arg2);
1253 if (pkey->ameth->pkey_ctrl == NULL)
1255 return pkey->ameth->pkey_ctrl(pkey, op, arg1, arg2);
1258 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
1260 return evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 0, pnid);
1263 int EVP_PKEY_get_default_digest_name(EVP_PKEY *pkey,
1264 char *mdname, size_t mdname_sz)
1266 if (pkey->ameth == NULL)
1267 return evp_keymgmt_util_get_deflt_digest_name(pkey->keymgmt,
1272 int nid = NID_undef;
1273 int rv = EVP_PKEY_get_default_digest_nid(pkey, &nid);
1274 const char *name = rv > 0 ? OBJ_nid2sn(nid) : NULL;
1277 OPENSSL_strlcpy(mdname, name, mdname_sz);
1282 int EVP_PKEY_supports_digest_nid(EVP_PKEY *pkey, int nid)
1284 int rv, default_nid;
1286 rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SUPPORTS_MD_NID, nid, NULL);
1289 * If there is a mandatory default digest and this isn't it, then
1290 * the answer is 'no'.
1292 rv = EVP_PKEY_get_default_digest_nid(pkey, &default_nid);
1294 return (nid == default_nid);
1295 /* zero is an error from EVP_PKEY_get_default_digest_nid() */
1302 int EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY *pkey,
1303 const unsigned char *pt, size_t ptlen)
1305 if (pkey->ameth == NULL) {
1306 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1308 if (pkey->keymgmt == NULL || pkey->keydata == NULL)
1312 OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_TLS_ENCODED_PT,
1313 (unsigned char *)pt, ptlen);
1314 return evp_keymgmt_set_params(pkey->keymgmt, pkey->keydata, params);
1317 if (ptlen > INT_MAX)
1319 if (evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SET1_TLS_ENCPT, ptlen,
1325 size_t EVP_PKEY_get1_tls_encodedpoint(EVP_PKEY *pkey, unsigned char **ppt)
1329 if (pkey->ameth == NULL) {
1330 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1332 if (pkey->keymgmt == NULL || pkey->keydata == NULL)
1336 OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_TLS_ENCODED_PT,
1338 if (!evp_keymgmt_get_params(pkey->keymgmt, pkey->keydata, params))
1341 *ppt = OPENSSL_malloc(params[0].return_size);
1346 OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_TLS_ENCODED_PT,
1347 *ppt, params[0].return_size);
1348 if (!evp_keymgmt_get_params(pkey->keymgmt, pkey->keydata, params))
1351 return params[0].return_size;
1355 rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_GET1_TLS_ENCPT, 0, ppt);
1361 #endif /* FIPS_MODULE */
1363 /*- All methods below can also be used in FIPS_MODULE */
1365 EVP_PKEY *EVP_PKEY_new(void)
1367 EVP_PKEY *ret = OPENSSL_zalloc(sizeof(*ret));
1370 EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
1373 ret->type = EVP_PKEY_NONE;
1374 ret->save_type = EVP_PKEY_NONE;
1375 ret->references = 1;
1376 ret->save_parameters = 1;
1377 ret->lock = CRYPTO_THREAD_lock_new();
1378 if (ret->lock == NULL) {
1379 EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
1383 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_EVP_PKEY, ret, &ret->ex_data)) {
1384 EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
1391 CRYPTO_THREAD_lock_free(ret->lock);
1397 * Setup a public key management method.
1399 * For legacy keys, either |type| or |str| is expected to have the type
1400 * information. In this case, the setup consists of finding an ASN1 method
1401 * and potentially an ENGINE, and setting those fields in |pkey|.
1403 * For provider side keys, |keymgmt| is expected to be non-NULL. In this
1404 * case, the setup consists of setting the |keymgmt| field in |pkey|.
1406 * If pkey is NULL just return 1 or 0 if the key management method exists.
1409 static int pkey_set_type(EVP_PKEY *pkey, ENGINE *e, int type, const char *str,
1410 int len, EVP_KEYMGMT *keymgmt)
1413 const EVP_PKEY_ASN1_METHOD *ameth = NULL;
1414 ENGINE **eptr = (e == NULL) ? &e : NULL;
1418 * The setups can't set both legacy and provider side methods.
1421 if (!ossl_assert(type == EVP_PKEY_NONE || keymgmt == NULL)
1422 || !ossl_assert(e == NULL || keymgmt == NULL)) {
1423 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1431 free_it = free_it || pkey->pkey.ptr != NULL;
1433 free_it = free_it || pkey->keydata != NULL;
1435 evp_pkey_free_it(pkey);
1438 * If key type matches and a method exists then this lookup has
1439 * succeeded once so just indicate success.
1441 if (pkey->type != EVP_PKEY_NONE
1442 && type == pkey->save_type
1443 && pkey->ameth != NULL)
1445 # ifndef OPENSSL_NO_ENGINE
1446 /* If we have ENGINEs release them */
1447 ENGINE_finish(pkey->engine);
1448 pkey->engine = NULL;
1449 ENGINE_finish(pkey->pmeth_engine);
1450 pkey->pmeth_engine = NULL;
1456 ameth = EVP_PKEY_asn1_find_str(eptr, str, len);
1457 else if (type != EVP_PKEY_NONE)
1458 ameth = EVP_PKEY_asn1_find(eptr, type);
1459 # ifndef OPENSSL_NO_ENGINE
1460 if (pkey == NULL && eptr != NULL)
1470 check = check && ameth == NULL;
1472 check = check && keymgmt == NULL;
1474 EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
1479 if (keymgmt != NULL && !EVP_KEYMGMT_up_ref(keymgmt)) {
1480 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1484 pkey->keymgmt = keymgmt;
1486 pkey->save_type = type;
1491 * If the internal "origin" key is provider side, don't save |ameth|.
1492 * The main reason is that |ameth| is one factor to detect that the
1493 * internal "origin" key is a legacy one.
1495 if (keymgmt == NULL)
1496 pkey->ameth = ameth;
1500 * The EVP_PKEY_ASN1_METHOD |pkey_id| retains its legacy key purpose
1501 * for any key type that has a legacy implementation, regardless of
1502 * if the internal key is a legacy or a provider side one. When
1503 * there is no legacy implementation for the key, the type becomes
1504 * EVP_PKEY_KEYMGMT, which indicates that one should be cautious
1505 * with functions that expect legacy internal keys.
1508 pkey->type = ameth->pkey_id;
1510 pkey->type = EVP_PKEY_KEYMGMT;
1517 static void find_ameth(const char *name, void *data)
1519 const char **str = data;
1522 * The error messages from pkey_set_type() are uninteresting here,
1527 if (pkey_set_type(NULL, NULL, EVP_PKEY_NONE, name, strlen(name),
1531 else if (str[1] == NULL)
1539 int EVP_PKEY_set_type_by_keymgmt(EVP_PKEY *pkey, EVP_KEYMGMT *keymgmt)
1542 # define EVP_PKEY_TYPE_STR str[0]
1543 # define EVP_PKEY_TYPE_STRLEN (str[0] == NULL ? -1 : (int)strlen(str[0]))
1545 * Find at most two strings that have an associated EVP_PKEY_ASN1_METHOD
1546 * Ideally, only one should be found. If two (or more) are found, the
1547 * match is ambiguous. This should never happen, but...
1549 const char *str[2] = { NULL, NULL };
1551 EVP_KEYMGMT_names_do_all(keymgmt, find_ameth, &str);
1552 if (str[1] != NULL) {
1553 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1557 # define EVP_PKEY_TYPE_STR NULL
1558 # define EVP_PKEY_TYPE_STRLEN -1
1560 return pkey_set_type(pkey, NULL, EVP_PKEY_NONE,
1561 EVP_PKEY_TYPE_STR, EVP_PKEY_TYPE_STRLEN,
1564 #undef EVP_PKEY_TYPE_STR
1565 #undef EVP_PKEY_TYPE_STRLEN
1568 int EVP_PKEY_up_ref(EVP_PKEY *pkey)
1572 if (CRYPTO_UP_REF(&pkey->references, &i, pkey->lock) <= 0)
1575 REF_PRINT_COUNT("EVP_PKEY", pkey);
1576 REF_ASSERT_ISNT(i < 2);
1577 return ((i > 1) ? 1 : 0);
1581 void evp_pkey_free_legacy(EVP_PKEY *x)
1583 if (x->ameth != NULL) {
1584 if (x->ameth->pkey_free != NULL)
1585 x->ameth->pkey_free(x);
1588 # ifndef OPENSSL_NO_ENGINE
1589 ENGINE_finish(x->engine);
1591 ENGINE_finish(x->pmeth_engine);
1592 x->pmeth_engine = NULL;
1595 #endif /* FIPS_MODULE */
1597 static void evp_pkey_free_it(EVP_PKEY *x)
1599 /* internal function; x is never NULL */
1601 evp_keymgmt_util_clear_operation_cache(x);
1603 evp_pkey_free_legacy(x);
1606 if (x->keymgmt != NULL) {
1607 evp_keymgmt_freedata(x->keymgmt, x->keydata);
1608 EVP_KEYMGMT_free(x->keymgmt);
1612 x->type = EVP_PKEY_NONE;
1615 void EVP_PKEY_free(EVP_PKEY *x)
1622 CRYPTO_DOWN_REF(&x->references, &i, x->lock);
1623 REF_PRINT_COUNT("EVP_PKEY", x);
1626 REF_ASSERT_ISNT(i < 0);
1627 evp_pkey_free_it(x);
1629 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_EVP_PKEY, x, &x->ex_data);
1631 CRYPTO_THREAD_lock_free(x->lock);
1633 sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
1638 int EVP_PKEY_size(const EVP_PKEY *pkey)
1643 size = pkey->cache.size;
1645 if (pkey->ameth != NULL && pkey->ameth->pkey_size != NULL)
1646 size = pkey->ameth->pkey_size(pkey);
1652 void *evp_pkey_export_to_provider(EVP_PKEY *pk, OPENSSL_CTX *libctx,
1653 EVP_KEYMGMT **keymgmt,
1654 const char *propquery)
1656 EVP_KEYMGMT *allocated_keymgmt = NULL;
1657 EVP_KEYMGMT *tmp_keymgmt = NULL;
1658 void *keydata = NULL;
1664 /* No key data => nothing to export */
1667 check = check && pk->pkey.ptr == NULL;
1669 check = check && pk->keydata == NULL;
1674 if (pk->pkey.ptr != NULL) {
1676 * If the legacy key doesn't have an dirty counter or export function,
1679 if (pk->ameth->dirty_cnt == NULL || pk->ameth->export_to == NULL)
1684 if (keymgmt != NULL) {
1685 tmp_keymgmt = *keymgmt;
1690 * If no keymgmt was given or found, get a default keymgmt. We do so by
1691 * letting EVP_PKEY_CTX_new_from_pkey() do it for us, then we steal it.
1693 if (tmp_keymgmt == NULL) {
1694 EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new_from_pkey(libctx, pk, propquery);
1696 tmp_keymgmt = ctx->keymgmt;
1697 ctx->keymgmt = NULL;
1698 EVP_PKEY_CTX_free(ctx);
1701 /* If there's still no keymgmt to be had, give up */
1702 if (tmp_keymgmt == NULL)
1706 if (pk->pkey.ptr != NULL) {
1710 * If the legacy "origin" hasn't changed since last time, we try
1711 * to find our keymgmt in the operation cache. If it has changed,
1712 * |i| remains zero, and we will clear the cache further down.
1714 if (pk->ameth->dirty_cnt(pk) == pk->dirty_cnt_copy) {
1715 i = evp_keymgmt_util_find_operation_cache_index(pk, tmp_keymgmt);
1718 * If |tmp_keymgmt| is present in the operation cache, it means
1719 * that export doesn't need to be redone. In that case, we take
1720 * token copies of the cached pointers, to have token success
1723 if (i < OSSL_NELEM(pk->operation_cache)
1724 && pk->operation_cache[i].keymgmt != NULL) {
1725 keydata = pk->operation_cache[i].keydata;
1731 * TODO(3.0) Right now, we assume we have ample space. We will have
1732 * to think about a cache aging scheme, though, if |i| indexes outside
1735 if (!ossl_assert(i < OSSL_NELEM(pk->operation_cache)))
1738 /* Make sure that the keymgmt key type matches the legacy NID */
1739 if (!ossl_assert(EVP_KEYMGMT_is_a(tmp_keymgmt, OBJ_nid2sn(pk->type))))
1742 if ((keydata = evp_keymgmt_newdata(tmp_keymgmt)) == NULL)
1745 if (!pk->ameth->export_to(pk, keydata, tmp_keymgmt, libctx, propquery)) {
1746 evp_keymgmt_freedata(tmp_keymgmt, keydata);
1752 * If the dirty counter changed since last time, then clear the
1753 * operation cache. In that case, we know that |i| is zero. Just
1754 * in case this is a re-export, we increment then decrement the
1755 * keymgmt reference counter.
1757 if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) { /* refcnt++ */
1758 evp_keymgmt_freedata(tmp_keymgmt, keydata);
1762 if (pk->ameth->dirty_cnt(pk) != pk->dirty_cnt_copy)
1763 evp_keymgmt_util_clear_operation_cache(pk);
1764 EVP_KEYMGMT_free(tmp_keymgmt); /* refcnt-- */
1766 /* Add the new export to the operation cache */
1767 if (!evp_keymgmt_util_cache_keydata(pk, i, tmp_keymgmt, keydata)) {
1768 evp_keymgmt_freedata(tmp_keymgmt, keydata);
1773 /* Synchronize the dirty count */
1774 pk->dirty_cnt_copy = pk->ameth->dirty_cnt(pk);
1777 #endif /* FIPS_MODULE */
1779 keydata = evp_keymgmt_util_export_to_provider(pk, tmp_keymgmt);
1783 * If nothing was exported, |tmp_keymgmt| might point at a freed
1784 * EVP_KEYMGMT, so we clear it to be safe. It shouldn't be useful for
1785 * the caller either way in that case.
1787 if (keydata == NULL)
1790 if (keymgmt != NULL)
1791 *keymgmt = tmp_keymgmt;
1793 EVP_KEYMGMT_free(allocated_keymgmt);
1798 int evp_pkey_downgrade(EVP_PKEY *pk)
1800 EVP_KEYMGMT *keymgmt = pk->keymgmt;
1801 void *keydata = pk->keydata;
1802 int type = pk->type;
1803 const char *keytype = NULL;
1805 /* If this isn't a provider side key, we're done */
1806 if (keymgmt == NULL)
1809 keytype = evp_first_name(EVP_KEYMGMT_provider(keymgmt), keymgmt->name_id);
1812 * If the type is EVP_PKEY_NONE, then we have a problem somewhere else
1813 * in our code. If it's not one of the well known EVP_PKEY_xxx values,
1814 * it should at least be EVP_PKEY_KEYMGMT at this point.
1815 * TODO(3.0) remove this check when we're confident that the rest of the
1816 * code treats this correctly.
1818 if (!ossl_assert(type != EVP_PKEY_NONE)) {
1819 ERR_raise_data(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR,
1820 "keymgmt key type = %s but legacy type = EVP_PKEY_NONE",
1825 /* Prefer the legacy key type name for error reporting */
1826 if (type != EVP_PKEY_KEYMGMT)
1827 keytype = OBJ_nid2sn(type);
1830 * To be able to downgrade, we steal the provider side "origin" keymgmt
1831 * and keydata. We've already grabbed the pointers, so all we need to
1832 * do is clear those pointers in |pk| and then call evp_pkey_free_it().
1833 * That way, we can restore |pk| if we need to.
1837 evp_pkey_free_it(pk);
1838 if (EVP_PKEY_set_type(pk, type)) {
1839 /* If the key is typed but empty, we're done */
1840 if (keydata == NULL) {
1841 /* We're dropping the EVP_KEYMGMT */
1842 EVP_KEYMGMT_free(keymgmt);
1846 if (pk->ameth->import_from == NULL) {
1847 ERR_raise_data(ERR_LIB_EVP, EVP_R_NO_IMPORT_FUNCTION,
1848 "key type = %s", keytype);
1851 * We perform the export in the same libctx as the keymgmt that we
1854 OPENSSL_CTX *libctx = ossl_provider_library_context(keymgmt->prov);
1855 EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_from_pkey(libctx, pk, NULL);
1857 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
1860 && evp_keymgmt_export(keymgmt, keydata,
1861 OSSL_KEYMGMT_SELECT_ALL,
1862 pk->ameth->import_from, pctx)) {
1864 * Save the provider side data in the operation cache, so they'll
1865 * find it again. evp_pkey_free_it() cleared the cache, so it's
1866 * safe to assume slot zero is free.
1867 * Note that evp_keymgmt_util_cache_keydata() increments keymgmt's
1870 evp_keymgmt_util_cache_keydata(pk, 0, keymgmt, keydata);
1871 EVP_PKEY_CTX_free(pctx);
1873 /* Synchronize the dirty count */
1874 pk->dirty_cnt_copy = pk->ameth->dirty_cnt(pk);
1876 /* evp_keymgmt_export() increased the refcount... */
1877 EVP_KEYMGMT_free(keymgmt);
1880 EVP_PKEY_CTX_free(pctx);
1883 ERR_raise_data(ERR_LIB_EVP, EVP_R_KEYMGMT_EXPORT_FAILURE,
1884 "key type = %s", keytype);
1888 * Something went wrong. This could for example happen if the keymgmt
1889 * turns out to be an HSM implementation that refuses to let go of some
1890 * of the key data, typically the private bits. In this case, we restore
1891 * the provider side internal "origin" and leave it at that.
1893 if (!ossl_assert(evp_keymgmt_util_assign_pkey(pk, keymgmt, keydata))) {
1894 /* This should not be impossible */
1895 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1898 /* evp_keymgmt_util_assign_pkey() increased the refcount... */
1899 EVP_KEYMGMT_free(keymgmt);
1900 return 0; /* No downgrade, but at least the key is restored */
1902 #endif /* FIPS_MODULE */
1904 const OSSL_PARAM *EVP_PKEY_gettable_params(EVP_PKEY *pkey)
1907 || pkey->keymgmt == NULL
1908 || pkey->keydata == NULL)
1910 return EVP_KEYMGMT_gettable_params(pkey->keymgmt);
1913 int EVP_PKEY_get_bn_param(EVP_PKEY *pkey, const char *key_name, BIGNUM **bn)
1916 OSSL_PARAM params[2];
1917 unsigned char buffer[2048];
1918 unsigned char *buf = NULL;
1922 || pkey->keymgmt == NULL
1923 || pkey->keydata == NULL
1928 memset(buffer, 0, sizeof(buffer));
1929 params[0] = OSSL_PARAM_construct_BN(key_name, buffer, sizeof(buffer));
1930 params[1] = OSSL_PARAM_construct_end();
1931 if (!evp_keymgmt_get_params(pkey->keymgmt, pkey->keydata, params)) {
1932 if (!OSSL_PARAM_modified(params) || params[0].return_size == 0)
1934 buf_sz = params[0].return_size;
1936 * If it failed because the buffer was too small then allocate the
1937 * required buffer size and retry.
1939 buf = OPENSSL_zalloc(buf_sz);
1942 params[0].data = buf;
1943 params[0].data_size = buf_sz;
1945 if (!evp_keymgmt_get_params(pkey->keymgmt, pkey->keydata, params))
1948 /* Fail if the param was not found */
1949 if (!OSSL_PARAM_modified(params))
1951 ret = OSSL_PARAM_get_BN(params, bn);
1957 int EVP_PKEY_get_octet_string_param(EVP_PKEY *pkey, const char *key_name,
1958 unsigned char *buf, size_t max_buf_sz,
1961 OSSL_PARAM params[2];
1964 || pkey->keymgmt == NULL
1965 || pkey->keydata == NULL
1966 || key_name == NULL)
1969 params[0] = OSSL_PARAM_construct_octet_string(key_name, buf, max_buf_sz);
1970 params[1] = OSSL_PARAM_construct_end();
1971 if (!evp_keymgmt_get_params(pkey->keymgmt, pkey->keydata, params)
1972 || !OSSL_PARAM_modified(params))
1975 *out_sz = params[0].return_size;
1979 int EVP_PKEY_get_utf8_string_param(EVP_PKEY *pkey, const char *key_name,
1980 char *str, size_t max_buf_sz,
1983 OSSL_PARAM params[2];
1986 || pkey->keymgmt == NULL
1987 || pkey->keydata == NULL
1988 || key_name == NULL)
1991 params[0] = OSSL_PARAM_construct_utf8_string(key_name, str, max_buf_sz);
1992 params[1] = OSSL_PARAM_construct_end();
1993 if (!evp_keymgmt_get_params(pkey->keymgmt, pkey->keydata, params)
1994 || !OSSL_PARAM_modified(params))
1997 *out_sz = params[0].return_size;
2001 int EVP_PKEY_get_int_param(EVP_PKEY *pkey, const char *key_name, int *out)
2003 OSSL_PARAM params[2];
2006 || pkey->keymgmt == NULL
2007 || pkey->keydata == NULL
2008 || key_name == NULL)
2011 params[0] = OSSL_PARAM_construct_int(key_name, out);
2012 params[1] = OSSL_PARAM_construct_end();
2013 if (!evp_keymgmt_get_params(pkey->keymgmt, pkey->keydata, params)
2014 || !OSSL_PARAM_modified(params))
2019 int EVP_PKEY_get_size_t_param(EVP_PKEY *pkey, const char *key_name, size_t *out)
2021 OSSL_PARAM params[2];
2024 || pkey->keymgmt == NULL
2025 || pkey->keydata == NULL
2026 || key_name == NULL)
2029 params[0] = OSSL_PARAM_construct_size_t(key_name, out);
2030 params[1] = OSSL_PARAM_construct_end();
2031 if (!evp_keymgmt_get_params(pkey->keymgmt, pkey->keydata, params)
2032 || !OSSL_PARAM_modified(params))