2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/cryptlib.h"
12 #include <openssl/bn.h>
13 #include <openssl/err.h>
14 #include <openssl/objects.h>
15 #include <openssl/evp.h>
16 #include <openssl/x509.h>
17 #include <openssl/rsa.h>
18 #include <openssl/dsa.h>
19 #include <openssl/dh.h>
20 #include <openssl/engine.h>
22 #include "internal/asn1_int.h"
23 #include "internal/evp_int.h"
25 static void EVP_PKEY_free_it(EVP_PKEY *x);
27 int EVP_PKEY_bits(EVP_PKEY *pkey)
29 if (pkey && pkey->ameth && pkey->ameth->pkey_bits)
30 return pkey->ameth->pkey_bits(pkey);
34 int EVP_PKEY_security_bits(const EVP_PKEY *pkey)
38 if (!pkey->ameth || !pkey->ameth->pkey_security_bits)
40 return pkey->ameth->pkey_security_bits(pkey);
43 int EVP_PKEY_size(EVP_PKEY *pkey)
45 if (pkey && pkey->ameth && pkey->ameth->pkey_size)
46 return pkey->ameth->pkey_size(pkey);
50 int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
52 #ifndef OPENSSL_NO_DSA
53 if (pkey->type == EVP_PKEY_DSA) {
54 int ret = pkey->save_parameters;
57 pkey->save_parameters = mode;
62 if (pkey->type == EVP_PKEY_EC) {
63 int ret = pkey->save_parameters;
66 pkey->save_parameters = mode;
73 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
75 if (to->type == EVP_PKEY_NONE) {
76 if (EVP_PKEY_set_type(to, from->type) == 0)
78 } else if (to->type != from->type) {
79 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_KEY_TYPES);
83 if (EVP_PKEY_missing_parameters(from)) {
84 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS);
88 if (!EVP_PKEY_missing_parameters(to)) {
89 if (EVP_PKEY_cmp_parameters(to, from) == 1)
91 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_PARAMETERS);
95 if (from->ameth && from->ameth->param_copy)
96 return from->ameth->param_copy(to, from);
101 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
103 if (pkey->ameth && pkey->ameth->param_missing)
104 return pkey->ameth->param_missing(pkey);
108 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
110 if (a->type != b->type)
112 if (a->ameth && a->ameth->param_cmp)
113 return a->ameth->param_cmp(a, b);
117 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
119 if (a->type != b->type)
124 /* Compare parameters if the algorithm has them */
125 if (a->ameth->param_cmp) {
126 ret = a->ameth->param_cmp(a, b);
131 if (a->ameth->pub_cmp)
132 return a->ameth->pub_cmp(a, b);
138 EVP_PKEY *EVP_PKEY_new(void)
140 EVP_PKEY *ret = OPENSSL_zalloc(sizeof(*ret));
143 EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
146 ret->type = EVP_PKEY_NONE;
147 ret->save_type = EVP_PKEY_NONE;
149 ret->save_parameters = 1;
150 ret->lock = CRYPTO_THREAD_lock_new();
151 if (ret->lock == NULL) {
152 EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
159 int EVP_PKEY_up_ref(EVP_PKEY *pkey)
163 if (CRYPTO_atomic_add(&pkey->references, 1, &i, pkey->lock) <= 0)
166 REF_PRINT_COUNT("EVP_PKEY", pkey);
167 REF_ASSERT_ISNT(i < 2);
168 return ((i > 1) ? 1 : 0);
172 * Setup a public key ASN1 method and ENGINE from a NID or a string. If pkey
173 * is NULL just return 1 or 0 if the algorithm exists.
176 static int pkey_set_type(EVP_PKEY *pkey, int type, const char *str, int len)
178 const EVP_PKEY_ASN1_METHOD *ameth;
182 EVP_PKEY_free_it(pkey);
184 * If key type matches and a method exists then this lookup has
185 * succeeded once so just indicate success.
187 if ((type == pkey->save_type) && pkey->ameth)
189 #ifndef OPENSSL_NO_ENGINE
190 /* If we have an ENGINE release it */
191 ENGINE_finish(pkey->engine);
196 ameth = EVP_PKEY_asn1_find_str(&e, str, len);
198 ameth = EVP_PKEY_asn1_find(&e, type);
199 #ifndef OPENSSL_NO_ENGINE
204 EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
211 pkey->type = pkey->ameth->pkey_id;
212 pkey->save_type = type;
217 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
219 return pkey_set_type(pkey, type, NULL, -1);
222 int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
224 return pkey_set_type(pkey, EVP_PKEY_NONE, str, len);
227 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
229 if (pkey == NULL || !EVP_PKEY_set_type(pkey, type))
231 pkey->pkey.ptr = key;
232 return (key != NULL);
235 void *EVP_PKEY_get0(const EVP_PKEY *pkey)
237 return pkey->pkey.ptr;
240 #ifndef OPENSSL_NO_RSA
241 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
243 int ret = EVP_PKEY_assign_RSA(pkey, key);
249 RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey)
251 if (pkey->type != EVP_PKEY_RSA) {
252 EVPerr(EVP_F_EVP_PKEY_GET0_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
255 return pkey->pkey.rsa;
258 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
260 RSA *ret = EVP_PKEY_get0_RSA(pkey);
267 #ifndef OPENSSL_NO_DSA
268 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
270 int ret = EVP_PKEY_assign_DSA(pkey, key);
276 DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey)
278 if (pkey->type != EVP_PKEY_DSA) {
279 EVPerr(EVP_F_EVP_PKEY_GET0_DSA, EVP_R_EXPECTING_A_DSA_KEY);
282 return pkey->pkey.dsa;
285 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
287 DSA *ret = EVP_PKEY_get0_DSA(pkey);
294 #ifndef OPENSSL_NO_EC
296 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
298 int ret = EVP_PKEY_assign_EC_KEY(pkey, key);
304 EC_KEY *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey)
306 if (pkey->type != EVP_PKEY_EC) {
307 EVPerr(EVP_F_EVP_PKEY_GET0_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
310 return pkey->pkey.ec;
313 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
315 EC_KEY *ret = EVP_PKEY_get0_EC_KEY(pkey);
322 #ifndef OPENSSL_NO_DH
324 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
326 int ret = EVP_PKEY_assign_DH(pkey, key);
332 DH *EVP_PKEY_get0_DH(EVP_PKEY *pkey)
334 if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) {
335 EVPerr(EVP_F_EVP_PKEY_GET0_DH, EVP_R_EXPECTING_A_DH_KEY);
338 return pkey->pkey.dh;
341 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
343 DH *ret = EVP_PKEY_get0_DH(pkey);
350 int EVP_PKEY_type(int type)
353 const EVP_PKEY_ASN1_METHOD *ameth;
355 ameth = EVP_PKEY_asn1_find(&e, type);
357 ret = ameth->pkey_id;
360 #ifndef OPENSSL_NO_ENGINE
366 int EVP_PKEY_id(const EVP_PKEY *pkey)
371 int EVP_PKEY_base_id(const EVP_PKEY *pkey)
373 return EVP_PKEY_type(pkey->type);
376 void EVP_PKEY_free(EVP_PKEY *x)
383 CRYPTO_atomic_add(&x->references, -1, &i, x->lock);
384 REF_PRINT_COUNT("EVP_PKEY", x);
387 REF_ASSERT_ISNT(i < 0);
389 sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
393 static void EVP_PKEY_free_it(EVP_PKEY *x)
395 /* internal function; x is never NULL */
396 if (x->ameth && x->ameth->pkey_free) {
397 x->ameth->pkey_free(x);
400 #ifndef OPENSSL_NO_ENGINE
401 ENGINE_finish(x->engine);
404 CRYPTO_THREAD_lock_free(x->lock);
407 static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
410 BIO_indent(out, indent, 128);
411 BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
412 kstr, OBJ_nid2ln(pkey->type));
416 int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
417 int indent, ASN1_PCTX *pctx)
419 if (pkey->ameth && pkey->ameth->pub_print)
420 return pkey->ameth->pub_print(out, pkey, indent, pctx);
422 return unsup_alg(out, pkey, indent, "Public Key");
425 int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
426 int indent, ASN1_PCTX *pctx)
428 if (pkey->ameth && pkey->ameth->priv_print)
429 return pkey->ameth->priv_print(out, pkey, indent, pctx);
431 return unsup_alg(out, pkey, indent, "Private Key");
434 int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
435 int indent, ASN1_PCTX *pctx)
437 if (pkey->ameth && pkey->ameth->param_print)
438 return pkey->ameth->param_print(out, pkey, indent, pctx);
439 return unsup_alg(out, pkey, indent, "Parameters");
442 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
444 if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
446 return pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID,