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
);
81 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_EC_KEY
, ret
, &ret
->ex_data
)) {
86 ret
->lock
= CRYPTO_THREAD_lock_new();
87 if (ret
->lock
== NULL
) {
88 ECerr(EC_F_EC_KEY_NEW_METHOD
, ERR_R_MALLOC_FAILURE
);
89 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_EC_KEY
, ret
, &ret
->ex_data
);
94 ret
->meth
= EC_KEY_get_default_method();
95 #ifndef OPENSSL_NO_ENGINE
97 if (!ENGINE_init(engine
)) {
98 ECerr(EC_F_EC_KEY_NEW_METHOD
, ERR_R_ENGINE_LIB
);
99 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_EC_KEY
, ret
, &ret
->ex_data
);
100 CRYPTO_THREAD_lock_free(ret
->lock
);
104 ret
->engine
= engine
;
106 ret
->engine
= ENGINE_get_default_EC();
107 if (ret
->engine
!= NULL
) {
108 ret
->meth
= ENGINE_get_EC(ret
->engine
);
109 if (ret
->meth
== NULL
) {
110 ECerr(EC_F_EC_KEY_NEW_METHOD
, ERR_R_ENGINE_LIB
);
111 ENGINE_finish(ret
->engine
);
112 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_EC_KEY
, ret
, &ret
->ex_data
);
113 CRYPTO_THREAD_lock_free(ret
->lock
);
121 ret
->conv_form
= POINT_CONVERSION_UNCOMPRESSED
;
124 if (ret
->meth
->init
!= NULL
&& ret
->meth
->init(ret
) == 0) {
125 ECerr(EC_F_EC_KEY_NEW_METHOD
, ERR_R_INIT_FAIL
);
132 int ECDH_compute_key(void *out
, size_t outlen
, const EC_POINT
*pub_key
,
134 void *(*KDF
) (const void *in
, size_t inlen
, void *out
,
137 unsigned char *sec
= NULL
;
139 if (eckey
->meth
->compute_key
== NULL
) {
140 ECerr(EC_F_ECDH_COMPUTE_KEY
, EC_R_OPERATION_NOT_SUPPORTED
);
143 if (outlen
> INT_MAX
) {
144 ECerr(EC_F_ECDH_COMPUTE_KEY
, EC_R_INVALID_OUTPUT_LENGTH
);
147 if (!eckey
->meth
->compute_key(&sec
, &seclen
, pub_key
, eckey
))
150 KDF(sec
, seclen
, out
, &outlen
);
154 memcpy(out
, sec
, outlen
);
156 OPENSSL_clear_free(sec
, seclen
);
160 EC_KEY_METHOD
*EC_KEY_METHOD_new(const EC_KEY_METHOD
*meth
)
162 EC_KEY_METHOD
*ret
= OPENSSL_zalloc(sizeof(*meth
));
168 ret
->flags
|= EC_KEY_METHOD_DYNAMIC
;
172 void EC_KEY_METHOD_free(EC_KEY_METHOD
*meth
)
174 if (meth
->flags
& EC_KEY_METHOD_DYNAMIC
)
178 void EC_KEY_METHOD_set_init(EC_KEY_METHOD
*meth
,
179 int (*init
)(EC_KEY
*key
),
180 void (*finish
)(EC_KEY
*key
),
181 int (*copy
)(EC_KEY
*dest
, const EC_KEY
*src
),
182 int (*set_group
)(EC_KEY
*key
, const EC_GROUP
*grp
),
183 int (*set_private
)(EC_KEY
*key
,
184 const BIGNUM
*priv_key
),
185 int (*set_public
)(EC_KEY
*key
,
186 const EC_POINT
*pub_key
))
189 meth
->finish
= finish
;
191 meth
->set_group
= set_group
;
192 meth
->set_private
= set_private
;
193 meth
->set_public
= set_public
;
196 void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD
*meth
,
197 int (*keygen
)(EC_KEY
*key
))
199 meth
->keygen
= keygen
;
202 void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD
*meth
,
203 int (*ckey
)(unsigned char **psec
,
205 const EC_POINT
*pub_key
,
208 meth
->compute_key
= ckey
;
211 void EC_KEY_METHOD_set_sign(EC_KEY_METHOD
*meth
,
212 int (*sign
)(int type
, const unsigned char *dgst
,
213 int dlen
, unsigned char *sig
,
214 unsigned int *siglen
,
215 const BIGNUM
*kinv
, const BIGNUM
*r
,
217 int (*sign_setup
)(EC_KEY
*eckey
, BN_CTX
*ctx_in
,
218 BIGNUM
**kinvp
, BIGNUM
**rp
),
219 ECDSA_SIG
*(*sign_sig
)(const unsigned char *dgst
,
221 const BIGNUM
*in_kinv
,
226 meth
->sign_setup
= sign_setup
;
227 meth
->sign_sig
= sign_sig
;
230 void EC_KEY_METHOD_set_verify(EC_KEY_METHOD
*meth
,
231 int (*verify
)(int type
, const unsigned
232 char *dgst
, int dgst_len
,
233 const unsigned char *sigbuf
,
234 int sig_len
, EC_KEY
*eckey
),
235 int (*verify_sig
)(const unsigned char *dgst
,
237 const ECDSA_SIG
*sig
,
240 meth
->verify
= verify
;
241 meth
->verify_sig
= verify_sig
;
244 void EC_KEY_METHOD_get_init(EC_KEY_METHOD
*meth
,
245 int (**pinit
)(EC_KEY
*key
),
246 void (**pfinish
)(EC_KEY
*key
),
247 int (**pcopy
)(EC_KEY
*dest
, const EC_KEY
*src
),
248 int (**pset_group
)(EC_KEY
*key
,
249 const EC_GROUP
*grp
),
250 int (**pset_private
)(EC_KEY
*key
,
251 const BIGNUM
*priv_key
),
252 int (**pset_public
)(EC_KEY
*key
,
253 const EC_POINT
*pub_key
))
258 *pfinish
= meth
->finish
;
261 if (pset_group
!= NULL
)
262 *pset_group
= meth
->set_group
;
263 if (pset_private
!= NULL
)
264 *pset_private
= meth
->set_private
;
265 if (pset_public
!= NULL
)
266 *pset_public
= meth
->set_public
;
269 void EC_KEY_METHOD_get_keygen(EC_KEY_METHOD
*meth
,
270 int (**pkeygen
)(EC_KEY
*key
))
273 *pkeygen
= meth
->keygen
;
276 void EC_KEY_METHOD_get_compute_key(EC_KEY_METHOD
*meth
,
277 int (**pck
)(unsigned char **pout
,
279 const EC_POINT
*pub_key
,
283 *pck
= meth
->compute_key
;
286 void EC_KEY_METHOD_get_sign(EC_KEY_METHOD
*meth
,
287 int (**psign
)(int type
, const unsigned char *dgst
,
288 int dlen
, unsigned char *sig
,
289 unsigned int *siglen
,
290 const BIGNUM
*kinv
, const BIGNUM
*r
,
292 int (**psign_setup
)(EC_KEY
*eckey
, BN_CTX
*ctx_in
,
293 BIGNUM
**kinvp
, BIGNUM
**rp
),
294 ECDSA_SIG
*(**psign_sig
)(const unsigned char *dgst
,
296 const BIGNUM
*in_kinv
,
302 if (psign_setup
!= NULL
)
303 *psign_setup
= meth
->sign_setup
;
304 if (psign_sig
!= NULL
)
305 *psign_sig
= meth
->sign_sig
;
308 void EC_KEY_METHOD_get_verify(EC_KEY_METHOD
*meth
,
309 int (**pverify
)(int type
, const unsigned
310 char *dgst
, int dgst_len
,
311 const unsigned char *sigbuf
,
312 int sig_len
, EC_KEY
*eckey
),
313 int (**pverify_sig
)(const unsigned char *dgst
,
315 const ECDSA_SIG
*sig
,
319 *pverify
= meth
->verify
;
320 if (pverify_sig
!= NULL
)
321 *pverify_sig
= meth
->verify_sig
;