[thirdparty/openssl.git] / crypto / ec / ec_kmeth.c

/*
 * Copyright 2015-2023 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/*
 * ECDH and ECDSA low level APIs are deprecated for public use, but still ok
 * for internal use.
 */
#include "internal/deprecated.h"

#include <string.h>
#include <openssl/ec.h>
#ifndef FIPS_MODULE
# include <openssl/engine.h>
#endif
#include <openssl/err.h>
#include "ec_local.h"


static const EC_KEY_METHOD openssl_ec_key_method = {
    "OpenSSL EC_KEY method",
    0,
    0,0,0,0,0,0,
    ossl_ec_key_gen,
    ossl_ecdh_compute_key,
    ossl_ecdsa_sign,
    ossl_ecdsa_sign_setup,
    ossl_ecdsa_sign_sig,
    ossl_ecdsa_verify,
    ossl_ecdsa_verify_sig
};

static const EC_KEY_METHOD *default_ec_key_meth = &openssl_ec_key_method;

const EC_KEY_METHOD *EC_KEY_OpenSSL(void)
{
    return &openssl_ec_key_method;
}

const EC_KEY_METHOD *EC_KEY_get_default_method(void)
{
    return default_ec_key_meth;
}

void EC_KEY_set_default_method(const EC_KEY_METHOD *meth)
{
    if (meth == NULL)
        default_ec_key_meth = &openssl_ec_key_method;
    else
        default_ec_key_meth = meth;
}

const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key)
{
    return key->meth;
}

int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth)
{
    void (*finish)(EC_KEY *key) = key->meth->finish;

    if (finish != NULL)
        finish(key);

#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
    ENGINE_finish(key->engine);
    key->engine = NULL;
#endif

    key->meth = meth;
    if (meth->init != NULL)
        return meth->init(key);
    return 1;
}

EC_KEY *ossl_ec_key_new_method_int(OSSL_LIB_CTX *libctx, const char *propq,
                                   ENGINE *engine)
{
    EC_KEY *ret = OPENSSL_zalloc(sizeof(*ret));

    if (ret == NULL)
        return NULL;

    if (!CRYPTO_NEW_REF(&ret->references, 1)) {
        OPENSSL_free(ret);
        return NULL;
    }

    ret->libctx = libctx;
    if (propq != NULL) {
        ret->propq = OPENSSL_strdup(propq);
        if (ret->propq == NULL)
            goto err;
    }

    ret->meth = EC_KEY_get_default_method();
#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
    if (engine != NULL) {
        if (!ENGINE_init(engine)) {
            ERR_raise(ERR_LIB_EC, ERR_R_ENGINE_LIB);
            goto err;
        }
        ret->engine = engine;
    } else
        ret->engine = ENGINE_get_default_EC();
    if (ret->engine != NULL) {
        ret->meth = ENGINE_get_EC(ret->engine);
        if (ret->meth == NULL) {
            ERR_raise(ERR_LIB_EC, ERR_R_ENGINE_LIB);
            goto err;
        }
    }
#endif

    ret->version = 1;
    ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;

/* No ex_data inside the FIPS provider */
#ifndef FIPS_MODULE
    if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_EC_KEY, ret, &ret->ex_data)) {
        ERR_raise(ERR_LIB_EC, ERR_R_CRYPTO_LIB);
        goto err;
    }
#endif

    if (ret->meth->init != NULL && ret->meth->init(ret) == 0) {
        ERR_raise(ERR_LIB_EC, ERR_R_INIT_FAIL);
        goto err;
    }
    return ret;

 err:
    EC_KEY_free(ret);
    return NULL;
}

#ifndef FIPS_MODULE
EC_KEY *EC_KEY_new_method(ENGINE *engine)
{
    return ossl_ec_key_new_method_int(NULL, NULL, engine);
}
#endif

int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
                     const EC_KEY *eckey,
                     void *(*KDF) (const void *in, size_t inlen, void *out,
                                   size_t *outlen))
{
    unsigned char *sec = NULL;
    size_t seclen;
    if (eckey->meth->compute_key == NULL) {
        ERR_raise(ERR_LIB_EC, EC_R_OPERATION_NOT_SUPPORTED);
        return 0;
    }
    if (outlen > INT_MAX) {
        ERR_raise(ERR_LIB_EC, EC_R_INVALID_OUTPUT_LENGTH);
        return 0;
    }
    if (!eckey->meth->compute_key(&sec, &seclen, pub_key, eckey))
        return 0;
    if (KDF != NULL) {
        KDF(sec, seclen, out, &outlen);
    } else {
        if (outlen > seclen)
            outlen = seclen;
        memcpy(out, sec, outlen);
    }
    OPENSSL_clear_free(sec, seclen);
    return outlen;
}

EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth)
{
    EC_KEY_METHOD *ret = OPENSSL_zalloc(sizeof(*meth));

    if (ret == NULL)
        return NULL;
    if (meth != NULL)
        *ret = *meth;
    ret->flags |= EC_KEY_METHOD_DYNAMIC;
    return ret;
}

void EC_KEY_METHOD_free(EC_KEY_METHOD *meth)
{
    if (meth->flags & EC_KEY_METHOD_DYNAMIC)
        OPENSSL_free(meth);
}

void EC_KEY_METHOD_set_init(EC_KEY_METHOD *meth,
                            int (*init)(EC_KEY *key),
                            void (*finish)(EC_KEY *key),
                            int (*copy)(EC_KEY *dest, const EC_KEY *src),
                            int (*set_group)(EC_KEY *key, const EC_GROUP *grp),
                            int (*set_private)(EC_KEY *key,
                                               const BIGNUM *priv_key),
                            int (*set_public)(EC_KEY *key,
                                              const EC_POINT *pub_key))
{
    meth->init = init;
    meth->finish = finish;
    meth->copy = copy;
    meth->set_group = set_group;
    meth->set_private = set_private;
    meth->set_public = set_public;
}

void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
                              int (*keygen)(EC_KEY *key))
{
    meth->keygen = keygen;
}

void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD *meth,
                                   int (*ckey)(unsigned char **psec,
                                               size_t *pseclen,
                                               const EC_POINT *pub_key,
                                               const EC_KEY *ecdh))
{
    meth->compute_key = ckey;
}

void EC_KEY_METHOD_set_sign(EC_KEY_METHOD *meth,
                            int (*sign)(int type, const unsigned char *dgst,
                                        int dlen, unsigned char *sig,
                                        unsigned int *siglen,
                                        const BIGNUM *kinv, const BIGNUM *r,
                                        EC_KEY *eckey),
                            int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
                                              BIGNUM **kinvp, BIGNUM **rp),
                            ECDSA_SIG *(*sign_sig)(const unsigned char *dgst,
                                                   int dgst_len,
                                                   const BIGNUM *in_kinv,
                                                   const BIGNUM *in_r,
                                                   EC_KEY *eckey))
{
    meth->sign = sign;
    meth->sign_setup = sign_setup;
    meth->sign_sig = sign_sig;
}

void EC_KEY_METHOD_set_verify(EC_KEY_METHOD *meth,
                              int (*verify)(int type, const unsigned
                                            char *dgst, int dgst_len,
                                            const unsigned char *sigbuf,
                                            int sig_len, EC_KEY *eckey),
                              int (*verify_sig)(const unsigned char *dgst,
                                                int dgst_len,
                                                const ECDSA_SIG *sig,
                                                EC_KEY *eckey))
{
    meth->verify = verify;
    meth->verify_sig = verify_sig;
}

void EC_KEY_METHOD_get_init(const EC_KEY_METHOD *meth,
                            int (**pinit)(EC_KEY *key),
                            void (**pfinish)(EC_KEY *key),
                            int (**pcopy)(EC_KEY *dest, const EC_KEY *src),
                            int (**pset_group)(EC_KEY *key,
                                               const EC_GROUP *grp),
                            int (**pset_private)(EC_KEY *key,
                                                 const BIGNUM *priv_key),
                            int (**pset_public)(EC_KEY *key,
                                                const EC_POINT *pub_key))
{
    if (pinit != NULL)
        *pinit = meth->init;
    if (pfinish != NULL)
        *pfinish = meth->finish;
    if (pcopy != NULL)
        *pcopy = meth->copy;
    if (pset_group != NULL)
        *pset_group = meth->set_group;
    if (pset_private != NULL)
        *pset_private = meth->set_private;
    if (pset_public != NULL)
        *pset_public = meth->set_public;
}

void EC_KEY_METHOD_get_keygen(const EC_KEY_METHOD *meth,
                              int (**pkeygen)(EC_KEY *key))
{
    if (pkeygen != NULL)
        *pkeygen = meth->keygen;
}

void EC_KEY_METHOD_get_compute_key(const EC_KEY_METHOD *meth,
                                   int (**pck)(unsigned char **pout,
                                               size_t *poutlen,
                                               const EC_POINT *pub_key,
                                               const EC_KEY *ecdh))
{
    if (pck != NULL)
        *pck = meth->compute_key;
}

void EC_KEY_METHOD_get_sign(const EC_KEY_METHOD *meth,
                            int (**psign)(int type, const unsigned char *dgst,
                                          int dlen, unsigned char *sig,
                                          unsigned int *siglen,
                                          const BIGNUM *kinv, const BIGNUM *r,
                                          EC_KEY *eckey),
                            int (**psign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
                                                BIGNUM **kinvp, BIGNUM **rp),
                            ECDSA_SIG *(**psign_sig)(const unsigned char *dgst,
                                                     int dgst_len,
                                                     const BIGNUM *in_kinv,
                                                     const BIGNUM *in_r,
                                                     EC_KEY *eckey))
{
    if (psign != NULL)
        *psign = meth->sign;
    if (psign_setup != NULL)
        *psign_setup = meth->sign_setup;
    if (psign_sig != NULL)
        *psign_sig = meth->sign_sig;
}

void EC_KEY_METHOD_get_verify(const EC_KEY_METHOD *meth,
                              int (**pverify)(int type, const unsigned
                                              char *dgst, int dgst_len,
                                              const unsigned char *sigbuf,
                                              int sig_len, EC_KEY *eckey),
                              int (**pverify_sig)(const unsigned char *dgst,
                                                  int dgst_len,
                                                  const ECDSA_SIG *sig,
                                                  EC_KEY *eckey))
{
    if (pverify != NULL)
        *pverify = meth->verify;
    if (pverify_sig != NULL)
        *pverify_sig = meth->verify_sig;
}
Commit	Line	Data
28572b57	1	/*
da1c088f	2	* Copyright 2015-2023 The OpenSSL Project Authors. All Rights Reserved.
28572b57	3	*
a7f182b7	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
4f22f405 RS	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
28572b57 DSH	8	*/
28572b57 DSH	9
5e3f9aa4 P	10	/*
	11	* ECDH and ECDSA low level APIs are deprecated for public use, but still ok
	12	* for internal use.
	13	*/
	14	#include "internal/deprecated.h"
	15
e2285d87	16	#include <string.h>
28572b57	17	#include <openssl/ec.h>
3f773c91 TM	18	#ifndef FIPS_MODULE
	19	# include <openssl/engine.h>
	20	#endif
28572b57	21	#include <openssl/err.h>
706457b7	22	#include "ec_local.h"
28572b57 DSH	23
	24
	25	static const EC_KEY_METHOD openssl_ec_key_method = {
	26	"OpenSSL EC_KEY method",
5a6a1029	27	0,
3475bc96	28	0,0,0,0,0,0,
a22a7e70	29	ossl_ec_key_gen,
8c6ef786	30	ossl_ecdh_compute_key,
a200a817	31	ossl_ecdsa_sign,
8c6ef786 DSH	32	ossl_ecdsa_sign_setup,
8c6ef786 DSH	33	ossl_ecdsa_sign_sig,
a200a817	34	ossl_ecdsa_verify,
8c6ef786	35	ossl_ecdsa_verify_sig
28572b57 DSH	36	};
28572b57 DSH	37
a0ffedaf	38	static const EC_KEY_METHOD *default_ec_key_meth = &openssl_ec_key_method;
28572b57 DSH	39
	40	const EC_KEY_METHOD *EC_KEY_OpenSSL(void)
	41	{
	42	return &openssl_ec_key_method;
	43	}
	44
	45	const EC_KEY_METHOD *EC_KEY_get_default_method(void)
	46	{
	47	return default_ec_key_meth;
	48	}
	49
	50	void EC_KEY_set_default_method(const EC_KEY_METHOD *meth)
	51	{
	52	if (meth == NULL)
	53	default_ec_key_meth = &openssl_ec_key_method;
	54	else
	55	default_ec_key_meth = meth;
	56	}
	57
3aef36ff RS	58	const EC_KEY_METHOD EC_KEY_get_method(const EC_KEY key)
	59	{
	60	return key->meth;
	61	}
	62
	63	int EC_KEY_set_method(EC_KEY key, const EC_KEY_METHOD meth)
	64	{
	65	void (finish)(EC_KEY key) = key->meth->finish;
	66
	67	if (finish != NULL)
	68	finish(key);
	69
f844f9eb	70	#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
7c96dbcd RS	71	ENGINE_finish(key->engine);
7c96dbcd RS	72	key->engine = NULL;
3aef36ff RS	73	#endif
	74
	75	key->meth = meth;
	76	if (meth->init != NULL)
	77	return meth->init(key);
	78	return 1;
	79	}
	80
32ab57cb SL	81	EC_KEY ossl_ec_key_new_method_int(OSSL_LIB_CTX libctx, const char *propq,
32ab57cb SL	82	ENGINE *engine)
28572b57 DSH	83	{
	84	EC_KEY ret = OPENSSL_zalloc(sizeof(ret));
	85
e077455e	86	if (ret == NULL)
9b398ef2	87	return NULL;
3aef36ff	88
97beb77f P	89	if (!CRYPTO_NEW_REF(&ret->references, 1)) {
	90	OPENSSL_free(ret);
	91	return NULL;
	92	}
	93
a9612d6c	94	ret->libctx = libctx;
2da8d4eb MC	95	if (propq != NULL) {
2da8d4eb MC	96	ret->propq = OPENSSL_strdup(propq);
e077455e	97	if (ret->propq == NULL)
2da8d4eb	98	goto err;
2da8d4eb	99	}
a9612d6c	100
28572b57	101	ret->meth = EC_KEY_get_default_method();
f844f9eb	102	#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
91e7bcc2	103	if (engine != NULL) {
28572b57	104	if (!ENGINE_init(engine)) {
9311d0c4	105	ERR_raise(ERR_LIB_EC, ERR_R_ENGINE_LIB);
11ed851d	106	goto err;
28572b57 DSH	107	}
	108	ret->engine = engine;
	109	} else
7d711cbc	110	ret->engine = ENGINE_get_default_EC();
91e7bcc2	111	if (ret->engine != NULL) {
7d711cbc	112	ret->meth = ENGINE_get_EC(ret->engine);
91e7bcc2	113	if (ret->meth == NULL) {
9311d0c4	114	ERR_raise(ERR_LIB_EC, ERR_R_ENGINE_LIB);
11ed851d	115	goto err;
28572b57 DSH	116	}
	117	}
	118	#endif
	119
	120	ret->version = 1;
	121	ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
11ed851d	122
a9612d6c	123	/* No ex_data inside the FIPS provider */
f844f9eb	124	#ifndef FIPS_MODULE
11ed851d	125	if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_EC_KEY, ret, &ret->ex_data)) {
e077455e	126	ERR_raise(ERR_LIB_EC, ERR_R_CRYPTO_LIB);
11ed851d F	127	goto err;
11ed851d F	128	}
a9612d6c	129	#endif
9b398ef2	130
91e7bcc2	131	if (ret->meth->init != NULL && ret->meth->init(ret) == 0) {
9311d0c4	132	ERR_raise(ERR_LIB_EC, ERR_R_INIT_FAIL);
11ed851d	133	goto err;
0d6ff6d3 DSH	134	}
0d6ff6d3 DSH	135	return ret;
11ed851d	136
544648a8	137	err:
11ed851d F	138	EC_KEY_free(ret);
11ed851d F	139	return NULL;
28572b57	140	}
a22a7e70	141
f844f9eb	142	#ifndef FIPS_MODULE
a9612d6c MC	143	EC_KEY EC_KEY_new_method(ENGINE engine)
a9612d6c MC	144	{
32ab57cb	145	return ossl_ec_key_new_method_int(NULL, NULL, engine);
a9612d6c MC	146	}
	147	#endif
	148
a22a7e70	149	int ECDH_compute_key(void out, size_t outlen, const EC_POINT pub_key,
2c61a5ec	150	const EC_KEY *eckey,
a22a7e70 DSH	151	void (KDF) (const void in, size_t inlen, void out,
	152	size_t *outlen))
	153	{
e2285d87 DSH	154	unsigned char *sec = NULL;
	155	size_t seclen;
	156	if (eckey->meth->compute_key == NULL) {
9311d0c4	157	ERR_raise(ERR_LIB_EC, EC_R_OPERATION_NOT_SUPPORTED);
e2285d87 DSH	158	return 0;
	159	}
	160	if (outlen > INT_MAX) {
9311d0c4	161	ERR_raise(ERR_LIB_EC, EC_R_INVALID_OUTPUT_LENGTH);
e2285d87 DSH	162	return 0;
	163	}
	164	if (!eckey->meth->compute_key(&sec, &seclen, pub_key, eckey))
	165	return 0;
	166	if (KDF != NULL) {
	167	KDF(sec, seclen, out, &outlen);
	168	} else {
	169	if (outlen > seclen)
	170	outlen = seclen;
	171	memcpy(out, sec, outlen);
	172	}
	173	OPENSSL_clear_free(sec, seclen);
	174	return outlen;
a22a7e70	175	}
f8d7d2d6 DSH	176
	177	EC_KEY_METHOD EC_KEY_METHOD_new(const EC_KEY_METHOD meth)
	178	{
3aef36ff RS	179	EC_KEY_METHOD ret = OPENSSL_zalloc(sizeof(meth));
3aef36ff RS	180
f8d7d2d6 DSH	181	if (ret == NULL)
f8d7d2d6 DSH	182	return NULL;
91e7bcc2	183	if (meth != NULL)
f8d7d2d6 DSH	184	ret = meth;
	185	ret->flags \|= EC_KEY_METHOD_DYNAMIC;
	186	return ret;
	187	}
	188
	189	void EC_KEY_METHOD_free(EC_KEY_METHOD *meth)
	190	{
	191	if (meth->flags & EC_KEY_METHOD_DYNAMIC)
	192	OPENSSL_free(meth);
	193	}
	194
	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))
	204	{
	205	meth->init = init;
	206	meth->finish = finish;
	207	meth->copy = copy;
	208	meth->set_group = set_group;
	209	meth->set_private = set_private;
	210	meth->set_public = set_public;
	211	}
	212
	213	void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
	214	int (keygen)(EC_KEY key))
	215	{
	216	meth->keygen = keygen;
	217	}
	218
	219	void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD *meth,
e2285d87 DSH	220	int (ckey)(unsigned char *psec,
e2285d87 DSH	221	size_t *pseclen,
f8d7d2d6	222	const EC_POINT *pub_key,
e2285d87	223	const EC_KEY *ecdh))
f8d7d2d6 DSH	224	{
	225	meth->compute_key = ckey;
	226	}
	227
	228	void EC_KEY_METHOD_set_sign(EC_KEY_METHOD *meth,
	229	int (sign)(int type, const unsigned char dgst,
	230	int dlen, unsigned char *sig,
	231	unsigned int *siglen,
	232	const BIGNUM kinv, const BIGNUM r,
	233	EC_KEY *eckey),
	234	int (sign_setup)(EC_KEY eckey, BN_CTX *ctx_in,
	235	BIGNUM kinvp, BIGNUM rp),
	236	ECDSA_SIG (sign_sig)(const unsigned char *dgst,
	237	int dgst_len,
	238	const BIGNUM *in_kinv,
	239	const BIGNUM *in_r,
	240	EC_KEY *eckey))
	241	{
	242	meth->sign = sign;
	243	meth->sign_setup = sign_setup;
	244	meth->sign_sig = sign_sig;
	245	}
	246
	247	void EC_KEY_METHOD_set_verify(EC_KEY_METHOD *meth,
	248	int (*verify)(int type, const unsigned
	249	char *dgst, int dgst_len,
	250	const unsigned char *sigbuf,
	251	int sig_len, EC_KEY *eckey),
	252	int (verify_sig)(const unsigned char dgst,
	253	int dgst_len,
	254	const ECDSA_SIG *sig,
	255	EC_KEY *eckey))
	256	{
	257	meth->verify = verify;
	258	meth->verify_sig = verify_sig;
	259	}
	260
4e9b720e	261	void EC_KEY_METHOD_get_init(const EC_KEY_METHOD *meth,
f8d7d2d6 DSH	262	int (*pinit)(EC_KEY key),
	263	void (*pfinish)(EC_KEY key),
	264	int (*pcopy)(EC_KEY dest, const EC_KEY *src),
	265	int (*pset_group)(EC_KEY key,
	266	const EC_GROUP *grp),
	267	int (*pset_private)(EC_KEY key,
	268	const BIGNUM *priv_key),
	269	int (*pset_public)(EC_KEY key,
	270	const EC_POINT *pub_key))
	271	{
	272	if (pinit != NULL)
	273	*pinit = meth->init;
	274	if (pfinish != NULL)
	275	*pfinish = meth->finish;
	276	if (pcopy != NULL)
	277	*pcopy = meth->copy;
	278	if (pset_group != NULL)
	279	*pset_group = meth->set_group;
	280	if (pset_private != NULL)
	281	*pset_private = meth->set_private;
	282	if (pset_public != NULL)
	283	*pset_public = meth->set_public;
	284	}
	285
4e9b720e	286	void EC_KEY_METHOD_get_keygen(const EC_KEY_METHOD *meth,
f8d7d2d6 DSH	287	int (*pkeygen)(EC_KEY key))
	288	{
	289	if (pkeygen != NULL)
	290	*pkeygen = meth->keygen;
	291	}
	292
4e9b720e	293	void EC_KEY_METHOD_get_compute_key(const EC_KEY_METHOD *meth,
e2285d87 DSH	294	int (pck)(unsigned char pout,
e2285d87 DSH	295	size_t *poutlen,
f8d7d2d6	296	const EC_POINT *pub_key,
e2285d87	297	const EC_KEY *ecdh))
f8d7d2d6 DSH	298	{
	299	if (pck != NULL)
	300	*pck = meth->compute_key;
	301	}
	302
4e9b720e	303	void EC_KEY_METHOD_get_sign(const EC_KEY_METHOD *meth,
f8d7d2d6 DSH	304	int (*psign)(int type, const unsigned char dgst,
	305	int dlen, unsigned char *sig,
	306	unsigned int *siglen,
	307	const BIGNUM kinv, const BIGNUM r,
	308	EC_KEY *eckey),
	309	int (*psign_setup)(EC_KEY eckey, BN_CTX *ctx_in,
	310	BIGNUM kinvp, BIGNUM rp),
	311	ECDSA_SIG (psign_sig)(const unsigned char dgst,
	312	int dgst_len,
	313	const BIGNUM *in_kinv,
	314	const BIGNUM *in_r,
	315	EC_KEY *eckey))
	316	{
	317	if (psign != NULL)
	318	*psign = meth->sign;
	319	if (psign_setup != NULL)
	320	*psign_setup = meth->sign_setup;
	321	if (psign_sig != NULL)
	322	*psign_sig = meth->sign_sig;
	323	}
	324
4e9b720e	325	void EC_KEY_METHOD_get_verify(const EC_KEY_METHOD *meth,
f8d7d2d6 DSH	326	int (**pverify)(int type, const unsigned
	327	char *dgst, int dgst_len,
	328	const unsigned char *sigbuf,
	329	int sig_len, EC_KEY *eckey),
	330	int (*pverify_sig)(const unsigned char dgst,
	331	int dgst_len,
	332	const ECDSA_SIG *sig,
	333	EC_KEY *eckey))
	334	{
	335	if (pverify != NULL)
	336	*pverify = meth->verify;
	337	if (pverify_sig != NULL)
	338	*pverify_sig = meth->verify_sig;
	339	}