2 * Copyright 2015-2016 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 <openssl/ec.h>
12 #include <openssl/engine.h>
13 #include <openssl/err.h>
17 static const EC_KEY_METHOD openssl_ec_key_method
= {
18 "OpenSSL EC_KEY method",
22 ossl_ecdh_compute_key
,
24 ossl_ecdsa_sign_setup
,
30 static const EC_KEY_METHOD
*default_ec_key_meth
= &openssl_ec_key_method
;
32 const EC_KEY_METHOD
*EC_KEY_OpenSSL(void)
34 return &openssl_ec_key_method
;
37 const EC_KEY_METHOD
*EC_KEY_get_default_method(void)
39 return default_ec_key_meth
;
42 void EC_KEY_set_default_method(const EC_KEY_METHOD
*meth
)
45 default_ec_key_meth
= &openssl_ec_key_method
;
47 default_ec_key_meth
= meth
;
50 const EC_KEY_METHOD
*EC_KEY_get_method(const EC_KEY
*key
)
55 int EC_KEY_set_method(EC_KEY
*key
, const EC_KEY_METHOD
*meth
)
57 void (*finish
)(EC_KEY
*key
) = key
->meth
->finish
;
62 #ifndef OPENSSL_NO_ENGINE
63 ENGINE_finish(key
->engine
);
68 if (meth
->init
!= NULL
)
69 return meth
->init(key
);
73 EC_KEY
*EC_KEY_new_method(ENGINE
*engine
)
75 EC_KEY
*ret
= OPENSSL_zalloc(sizeof(*ret
));
78 ECerr(EC_F_EC_KEY_NEW_METHOD
, ERR_R_MALLOC_FAILURE
);
83 ret
->lock
= CRYPTO_THREAD_lock_new();
84 if (ret
->lock
== NULL
) {
85 ECerr(EC_F_EC_KEY_NEW_METHOD
, ERR_R_MALLOC_FAILURE
);
90 ret
->meth
= EC_KEY_get_default_method();
91 #ifndef OPENSSL_NO_ENGINE
93 if (!ENGINE_init(engine
)) {
94 ECerr(EC_F_EC_KEY_NEW_METHOD
, ERR_R_ENGINE_LIB
);
99 ret
->engine
= ENGINE_get_default_EC();
100 if (ret
->engine
!= NULL
) {
101 ret
->meth
= ENGINE_get_EC(ret
->engine
);
102 if (ret
->meth
== NULL
) {
103 ECerr(EC_F_EC_KEY_NEW_METHOD
, ERR_R_ENGINE_LIB
);
110 ret
->conv_form
= POINT_CONVERSION_UNCOMPRESSED
;
112 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_EC_KEY
, ret
, &ret
->ex_data
)) {
116 if (ret
->meth
->init
!= NULL
&& ret
->meth
->init(ret
) == 0) {
117 ECerr(EC_F_EC_KEY_NEW_METHOD
, ERR_R_INIT_FAIL
);
127 int ECDH_compute_key(void *out
, size_t outlen
, const EC_POINT
*pub_key
,
129 void *(*KDF
) (const void *in
, size_t inlen
, void *out
,
132 unsigned char *sec
= NULL
;
134 if (eckey
->meth
->compute_key
== NULL
) {
135 ECerr(EC_F_ECDH_COMPUTE_KEY
, EC_R_OPERATION_NOT_SUPPORTED
);
138 if (outlen
> INT_MAX
) {
139 ECerr(EC_F_ECDH_COMPUTE_KEY
, EC_R_INVALID_OUTPUT_LENGTH
);
142 if (!eckey
->meth
->compute_key(&sec
, &seclen
, pub_key
, eckey
))
145 KDF(sec
, seclen
, out
, &outlen
);
149 memcpy(out
, sec
, outlen
);
151 OPENSSL_clear_free(sec
, seclen
);
155 EC_KEY_METHOD
*EC_KEY_METHOD_new(const EC_KEY_METHOD
*meth
)
157 EC_KEY_METHOD
*ret
= OPENSSL_zalloc(sizeof(*meth
));
163 ret
->flags
|= EC_KEY_METHOD_DYNAMIC
;
167 void EC_KEY_METHOD_free(EC_KEY_METHOD
*meth
)
169 if (meth
->flags
& EC_KEY_METHOD_DYNAMIC
)
173 void EC_KEY_METHOD_set_init(EC_KEY_METHOD
*meth
,
174 int (*init
)(EC_KEY
*key
),
175 void (*finish
)(EC_KEY
*key
),
176 int (*copy
)(EC_KEY
*dest
, const EC_KEY
*src
),
177 int (*set_group
)(EC_KEY
*key
, const EC_GROUP
*grp
),
178 int (*set_private
)(EC_KEY
*key
,
179 const BIGNUM
*priv_key
),
180 int (*set_public
)(EC_KEY
*key
,
181 const EC_POINT
*pub_key
))
184 meth
->finish
= finish
;
186 meth
->set_group
= set_group
;
187 meth
->set_private
= set_private
;
188 meth
->set_public
= set_public
;
191 void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD
*meth
,
192 int (*keygen
)(EC_KEY
*key
))
194 meth
->keygen
= keygen
;
197 void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD
*meth
,
198 int (*ckey
)(unsigned char **psec
,
200 const EC_POINT
*pub_key
,
203 meth
->compute_key
= ckey
;
206 void EC_KEY_METHOD_set_sign(EC_KEY_METHOD
*meth
,
207 int (*sign
)(int type
, const unsigned char *dgst
,
208 int dlen
, unsigned char *sig
,
209 unsigned int *siglen
,
210 const BIGNUM
*kinv
, const BIGNUM
*r
,
212 int (*sign_setup
)(EC_KEY
*eckey
, BN_CTX
*ctx_in
,
213 BIGNUM
**kinvp
, BIGNUM
**rp
),
214 ECDSA_SIG
*(*sign_sig
)(const unsigned char *dgst
,
216 const BIGNUM
*in_kinv
,
221 meth
->sign_setup
= sign_setup
;
222 meth
->sign_sig
= sign_sig
;
225 void EC_KEY_METHOD_set_verify(EC_KEY_METHOD
*meth
,
226 int (*verify
)(int type
, const unsigned
227 char *dgst
, int dgst_len
,
228 const unsigned char *sigbuf
,
229 int sig_len
, EC_KEY
*eckey
),
230 int (*verify_sig
)(const unsigned char *dgst
,
232 const ECDSA_SIG
*sig
,
235 meth
->verify
= verify
;
236 meth
->verify_sig
= verify_sig
;
239 void EC_KEY_METHOD_get_init(const EC_KEY_METHOD
*meth
,
240 int (**pinit
)(EC_KEY
*key
),
241 void (**pfinish
)(EC_KEY
*key
),
242 int (**pcopy
)(EC_KEY
*dest
, const EC_KEY
*src
),
243 int (**pset_group
)(EC_KEY
*key
,
244 const EC_GROUP
*grp
),
245 int (**pset_private
)(EC_KEY
*key
,
246 const BIGNUM
*priv_key
),
247 int (**pset_public
)(EC_KEY
*key
,
248 const EC_POINT
*pub_key
))
253 *pfinish
= meth
->finish
;
256 if (pset_group
!= NULL
)
257 *pset_group
= meth
->set_group
;
258 if (pset_private
!= NULL
)
259 *pset_private
= meth
->set_private
;
260 if (pset_public
!= NULL
)
261 *pset_public
= meth
->set_public
;
264 void EC_KEY_METHOD_get_keygen(const EC_KEY_METHOD
*meth
,
265 int (**pkeygen
)(EC_KEY
*key
))
268 *pkeygen
= meth
->keygen
;
271 void EC_KEY_METHOD_get_compute_key(const EC_KEY_METHOD
*meth
,
272 int (**pck
)(unsigned char **pout
,
274 const EC_POINT
*pub_key
,
278 *pck
= meth
->compute_key
;
281 void EC_KEY_METHOD_get_sign(const EC_KEY_METHOD
*meth
,
282 int (**psign
)(int type
, const unsigned char *dgst
,
283 int dlen
, unsigned char *sig
,
284 unsigned int *siglen
,
285 const BIGNUM
*kinv
, const BIGNUM
*r
,
287 int (**psign_setup
)(EC_KEY
*eckey
, BN_CTX
*ctx_in
,
288 BIGNUM
**kinvp
, BIGNUM
**rp
),
289 ECDSA_SIG
*(**psign_sig
)(const unsigned char *dgst
,
291 const BIGNUM
*in_kinv
,
297 if (psign_setup
!= NULL
)
298 *psign_setup
= meth
->sign_setup
;
299 if (psign_sig
!= NULL
)
300 *psign_sig
= meth
->sign_sig
;
303 void EC_KEY_METHOD_get_verify(const EC_KEY_METHOD
*meth
,
304 int (**pverify
)(int type
, const unsigned
305 char *dgst
, int dgst_len
,
306 const unsigned char *sigbuf
,
307 int sig_len
, EC_KEY
*eckey
),
308 int (**pverify_sig
)(const unsigned char *dgst
,
310 const ECDSA_SIG
*sig
,
314 *pverify
= meth
->verify
;
315 if (pverify_sig
!= NULL
)
316 *pverify_sig
= meth
->verify_sig
;