2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2015 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
54 #include <openssl/ec.h>
55 #ifndef OPENSSL_NO_ENGINE
56 # include <openssl/engine.h>
58 #include <openssl/err.h>
62 static const EC_KEY_METHOD openssl_ec_key_method = {
63 "OpenSSL EC_KEY method",
67 ossl_ecdh_compute_key,
69 ossl_ecdsa_sign_setup,
75 static const EC_KEY_METHOD *default_ec_key_meth = &openssl_ec_key_method;
77 const EC_KEY_METHOD *EC_KEY_OpenSSL(void)
79 return &openssl_ec_key_method;
82 const EC_KEY_METHOD *EC_KEY_get_default_method(void)
84 return default_ec_key_meth;
87 void EC_KEY_set_default_method(const EC_KEY_METHOD *meth)
90 default_ec_key_meth = &openssl_ec_key_method;
92 default_ec_key_meth = meth;
95 const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key)
100 int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth)
102 void (*finish)(EC_KEY *key) = key->meth->finish;
107 #ifndef OPENSSL_NO_ENGINE
108 if (key->engine != NULL) {
109 ENGINE_finish(key->engine);
115 if (meth->init != NULL)
116 return meth->init(key);
120 EC_KEY *EC_KEY_new_method(ENGINE *engine)
122 EC_KEY *ret = OPENSSL_zalloc(sizeof(*ret));
125 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_MALLOC_FAILURE);
128 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_EC_KEY, ret, &ret->ex_data)) {
133 ret->meth = EC_KEY_get_default_method();
134 #ifndef OPENSSL_NO_ENGINE
135 if (engine != NULL) {
136 if (!ENGINE_init(engine)) {
137 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
141 ret->engine = engine;
143 ret->engine = ENGINE_get_default_EC();
144 if (ret->engine != NULL) {
145 ret->meth = ENGINE_get_EC(ret->engine);
146 if (ret->meth == NULL) {
147 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
148 ENGINE_finish(ret->engine);
156 ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
158 if (ret->meth->init != NULL && ret->meth->init(ret) == 0) {
165 int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
167 void *(*KDF) (const void *in, size_t inlen, void *out,
170 if (eckey->meth->compute_key != NULL)
171 return eckey->meth->compute_key(out, outlen, pub_key, eckey, KDF);
172 ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_OPERATION_NOT_SUPPORTED);
176 EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth)
178 EC_KEY_METHOD *ret = OPENSSL_zalloc(sizeof(*meth));
184 ret->flags |= EC_KEY_METHOD_DYNAMIC;
188 void EC_KEY_METHOD_free(EC_KEY_METHOD *meth)
190 if (meth->flags & EC_KEY_METHOD_DYNAMIC)
194 void EC_KEY_METHOD_set_init(EC_KEY_METHOD *meth,
195 int (*init)(EC_KEY *key),
196 void (*finish)(EC_KEY *key),
197 int (*copy)(EC_KEY *dest, const EC_KEY *src),
198 int (*set_group)(EC_KEY *key, const EC_GROUP *grp),
199 int (*set_private)(EC_KEY *key,
200 const BIGNUM *priv_key),
201 int (*set_public)(EC_KEY *key,
202 const EC_POINT *pub_key))
205 meth->finish = finish;
207 meth->set_group = set_group;
208 meth->set_private = set_private;
209 meth->set_public = set_public;
212 void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
213 int (*keygen)(EC_KEY *key))
215 meth->keygen = keygen;
218 void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD *meth,
219 int (*ckey)(void *out,
221 const EC_POINT *pub_key,
223 void *(*KDF) (const void *in,
228 meth->compute_key = ckey;
231 void EC_KEY_METHOD_set_sign(EC_KEY_METHOD *meth,
232 int (*sign)(int type, const unsigned char *dgst,
233 int dlen, unsigned char *sig,
234 unsigned int *siglen,
235 const BIGNUM *kinv, const BIGNUM *r,
237 int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
238 BIGNUM **kinvp, BIGNUM **rp),
239 ECDSA_SIG *(*sign_sig)(const unsigned char *dgst,
241 const BIGNUM *in_kinv,
246 meth->sign_setup = sign_setup;
247 meth->sign_sig = sign_sig;
250 void EC_KEY_METHOD_set_verify(EC_KEY_METHOD *meth,
251 int (*verify)(int type, const unsigned
252 char *dgst, int dgst_len,
253 const unsigned char *sigbuf,
254 int sig_len, EC_KEY *eckey),
255 int (*verify_sig)(const unsigned char *dgst,
257 const ECDSA_SIG *sig,
260 meth->verify = verify;
261 meth->verify_sig = verify_sig;
264 void EC_KEY_METHOD_get_init(EC_KEY_METHOD *meth,
265 int (**pinit)(EC_KEY *key),
266 void (**pfinish)(EC_KEY *key),
267 int (**pcopy)(EC_KEY *dest, const EC_KEY *src),
268 int (**pset_group)(EC_KEY *key,
269 const EC_GROUP *grp),
270 int (**pset_private)(EC_KEY *key,
271 const BIGNUM *priv_key),
272 int (**pset_public)(EC_KEY *key,
273 const EC_POINT *pub_key))
278 *pfinish = meth->finish;
281 if (pset_group != NULL)
282 *pset_group = meth->set_group;
283 if (pset_private != NULL)
284 *pset_private = meth->set_private;
285 if (pset_public != NULL)
286 *pset_public = meth->set_public;
289 void EC_KEY_METHOD_get_keygen(EC_KEY_METHOD *meth,
290 int (**pkeygen)(EC_KEY *key))
293 *pkeygen = meth->keygen;
296 void EC_KEY_METHOD_get_compute_key(EC_KEY_METHOD *meth,
297 int (**pck)(void *out,
299 const EC_POINT *pub_key,
301 void *(*KDF) (const void *in,
307 *pck = meth->compute_key;
310 void EC_KEY_METHOD_get_sign(EC_KEY_METHOD *meth,
311 int (**psign)(int type, const unsigned char *dgst,
312 int dlen, unsigned char *sig,
313 unsigned int *siglen,
314 const BIGNUM *kinv, const BIGNUM *r,
316 int (**psign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
317 BIGNUM **kinvp, BIGNUM **rp),
318 ECDSA_SIG *(**psign_sig)(const unsigned char *dgst,
320 const BIGNUM *in_kinv,
326 if (psign_setup != NULL)
327 *psign_setup = meth->sign_setup;
328 if (psign_sig != NULL)
329 *psign_sig = meth->sign_sig;
332 void EC_KEY_METHOD_get_verify(EC_KEY_METHOD *meth,
333 int (**pverify)(int type, const unsigned
334 char *dgst, int dgst_len,
335 const unsigned char *sigbuf,
336 int sig_len, EC_KEY *eckey),
337 int (**pverify_sig)(const unsigned char *dgst,
339 const ECDSA_SIG *sig,
343 *pverify = meth->verify;
344 if (pverify_sig != NULL)
345 *pverify_sig = meth->verify_sig;