1 /* crypto/ec/ec_kmeth.c */
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
6 /* ====================================================================
7 * Copyright (c) 2015 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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52 * ====================================================================
55 #include <openssl/ec.h>
56 #ifndef OPENSSL_NO_ENGINE
57 # include <openssl/engine.h>
59 #include <openssl/err.h>
63 static const EC_KEY_METHOD openssl_ec_key_method = {
64 "OpenSSL EC_KEY method",
68 ossl_ecdh_compute_key,
70 ossl_ecdsa_sign_setup,
76 static const EC_KEY_METHOD *default_ec_key_meth = &openssl_ec_key_method;
78 const EC_KEY_METHOD *EC_KEY_OpenSSL(void)
80 return &openssl_ec_key_method;
83 const EC_KEY_METHOD *EC_KEY_get_default_method(void)
85 return default_ec_key_meth;
88 void EC_KEY_set_default_method(const EC_KEY_METHOD *meth)
91 default_ec_key_meth = &openssl_ec_key_method;
93 default_ec_key_meth = meth;
96 const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key)
101 int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth)
103 void (*finish)(EC_KEY *key) = key->meth->finish;
108 #ifndef OPENSSL_NO_ENGINE
109 if (key->engine != NULL) {
110 ENGINE_finish(key->engine);
116 if (meth->init != NULL)
117 return meth->init(key);
121 EC_KEY *EC_KEY_new_method(ENGINE *engine)
123 EC_KEY *ret = OPENSSL_zalloc(sizeof(*ret));
126 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_MALLOC_FAILURE);
129 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_EC_KEY, ret, &ret->ex_data)) {
134 ret->meth = EC_KEY_get_default_method();
135 #ifndef OPENSSL_NO_ENGINE
136 if (engine != NULL) {
137 if (!ENGINE_init(engine)) {
138 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
142 ret->engine = engine;
144 ret->engine = ENGINE_get_default_EC();
145 if (ret->engine != NULL) {
146 ret->meth = ENGINE_get_EC(ret->engine);
147 if (ret->meth == NULL) {
148 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
149 ENGINE_finish(ret->engine);
157 ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
159 if (ret->meth->init != NULL && ret->meth->init(ret) == 0) {
166 int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
168 void *(*KDF) (const void *in, size_t inlen, void *out,
171 if (eckey->meth->compute_key != NULL)
172 return eckey->meth->compute_key(out, outlen, pub_key, eckey, KDF);
173 ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_OPERATION_NOT_SUPPORTED);
177 EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth)
179 EC_KEY_METHOD *ret = OPENSSL_zalloc(sizeof(*meth));
185 ret->flags |= EC_KEY_METHOD_DYNAMIC;
189 void EC_KEY_METHOD_free(EC_KEY_METHOD *meth)
191 if (meth->flags & EC_KEY_METHOD_DYNAMIC)
195 void EC_KEY_METHOD_set_init(EC_KEY_METHOD *meth,
196 int (*init)(EC_KEY *key),
197 void (*finish)(EC_KEY *key),
198 int (*copy)(EC_KEY *dest, const EC_KEY *src),
199 int (*set_group)(EC_KEY *key, const EC_GROUP *grp),
200 int (*set_private)(EC_KEY *key,
201 const BIGNUM *priv_key),
202 int (*set_public)(EC_KEY *key,
203 const EC_POINT *pub_key))
206 meth->finish = finish;
208 meth->set_group = set_group;
209 meth->set_private = set_private;
210 meth->set_public = set_public;
213 void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
214 int (*keygen)(EC_KEY *key))
216 meth->keygen = keygen;
219 void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD *meth,
220 int (*ckey)(void *out,
222 const EC_POINT *pub_key,
224 void *(*KDF) (const void *in,
229 meth->compute_key = ckey;
232 void EC_KEY_METHOD_set_sign(EC_KEY_METHOD *meth,
233 int (*sign)(int type, const unsigned char *dgst,
234 int dlen, unsigned char *sig,
235 unsigned int *siglen,
236 const BIGNUM *kinv, const BIGNUM *r,
238 int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
239 BIGNUM **kinvp, BIGNUM **rp),
240 ECDSA_SIG *(*sign_sig)(const unsigned char *dgst,
242 const BIGNUM *in_kinv,
247 meth->sign_setup = sign_setup;
248 meth->sign_sig = sign_sig;
251 void EC_KEY_METHOD_set_verify(EC_KEY_METHOD *meth,
252 int (*verify)(int type, const unsigned
253 char *dgst, int dgst_len,
254 const unsigned char *sigbuf,
255 int sig_len, EC_KEY *eckey),
256 int (*verify_sig)(const unsigned char *dgst,
258 const ECDSA_SIG *sig,
261 meth->verify = verify;
262 meth->verify_sig = verify_sig;
265 void EC_KEY_METHOD_get_init(EC_KEY_METHOD *meth,
266 int (**pinit)(EC_KEY *key),
267 void (**pfinish)(EC_KEY *key),
268 int (**pcopy)(EC_KEY *dest, const EC_KEY *src),
269 int (**pset_group)(EC_KEY *key,
270 const EC_GROUP *grp),
271 int (**pset_private)(EC_KEY *key,
272 const BIGNUM *priv_key),
273 int (**pset_public)(EC_KEY *key,
274 const EC_POINT *pub_key))
279 *pfinish = meth->finish;
282 if (pset_group != NULL)
283 *pset_group = meth->set_group;
284 if (pset_private != NULL)
285 *pset_private = meth->set_private;
286 if (pset_public != NULL)
287 *pset_public = meth->set_public;
290 void EC_KEY_METHOD_get_keygen(EC_KEY_METHOD *meth,
291 int (**pkeygen)(EC_KEY *key))
294 *pkeygen = meth->keygen;
297 void EC_KEY_METHOD_get_compute_key(EC_KEY_METHOD *meth,
298 int (**pck)(void *out,
300 const EC_POINT *pub_key,
302 void *(*KDF) (const void *in,
308 *pck = meth->compute_key;
311 void EC_KEY_METHOD_get_sign(EC_KEY_METHOD *meth,
312 int (**psign)(int type, const unsigned char *dgst,
313 int dlen, unsigned char *sig,
314 unsigned int *siglen,
315 const BIGNUM *kinv, const BIGNUM *r,
317 int (**psign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
318 BIGNUM **kinvp, BIGNUM **rp),
319 ECDSA_SIG *(**psign_sig)(const unsigned char *dgst,
321 const BIGNUM *in_kinv,
327 if (psign_setup != NULL)
328 *psign_setup = meth->sign_setup;
329 if (psign_sig != NULL)
330 *psign_sig = meth->sign_sig;
333 void EC_KEY_METHOD_get_verify(EC_KEY_METHOD *meth,
334 int (**pverify)(int type, const unsigned
335 char *dgst, int dgst_len,
336 const unsigned char *sigbuf,
337 int sig_len, EC_KEY *eckey),
338 int (**pverify_sig)(const unsigned char *dgst,
340 const ECDSA_SIG *sig,
344 *pverify = meth->verify;
345 if (pverify_sig != NULL)
346 *pverify_sig = meth->verify_sig;