[thirdparty/openssl.git] / crypto / sm2 / sm2_pmeth.c

/*
 * Copyright 2006-2020 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
 */

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

#include "internal/cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/ec.h>
#include <openssl/evp.h>
#include "crypto/evp.h"
#include "crypto/sm2.h"
#include "crypto/sm2err.h"

/* EC pkey context structure */

typedef struct {
    /* message digest */
    const EVP_MD *md;
    /* Distinguishing Identifier, ISO/IEC 15946-3, FIPS 196 */
    uint8_t *id;
    size_t id_len;
    /* id_set indicates if the 'id' field is set (1) or not (0) */
    int id_set;
} SM2_PKEY_CTX;

static int pkey_sm2_init(EVP_PKEY_CTX *ctx)
{
    SM2_PKEY_CTX *smctx;

    if ((smctx = OPENSSL_zalloc(sizeof(*smctx))) == NULL) {
        SM2err(SM2_F_PKEY_SM2_INIT, ERR_R_MALLOC_FAILURE);
        return 0;
    }

    ctx->data = smctx;
    return 1;
}

static void pkey_sm2_cleanup(EVP_PKEY_CTX *ctx)
{
    SM2_PKEY_CTX *smctx = ctx->data;

    if (smctx != NULL) {
        OPENSSL_free(smctx->id);
        OPENSSL_free(smctx);
        ctx->data = NULL;
    }
}

static int pkey_sm2_copy(EVP_PKEY_CTX *dst, const EVP_PKEY_CTX *src)
{
    SM2_PKEY_CTX *dctx, *sctx;

    if (!pkey_sm2_init(dst))
        return 0;
    sctx = src->data;
    dctx = dst->data;
    if (sctx->id != NULL) {
        dctx->id = OPENSSL_malloc(sctx->id_len);
        if (dctx->id == NULL) {
            SM2err(SM2_F_PKEY_SM2_COPY, ERR_R_MALLOC_FAILURE);
            pkey_sm2_cleanup(dst);
            return 0;
        }
        memcpy(dctx->id, sctx->id, sctx->id_len);
    }
    dctx->id_len = sctx->id_len;
    dctx->id_set = sctx->id_set;
    dctx->md = sctx->md;

    return 1;
}

static int pkey_sm2_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
                         const unsigned char *tbs, size_t tbslen)
{
    int ret;
    unsigned int sltmp;
    EC_KEY *ec = ctx->pkey->pkey.ec;
    const int sig_sz = ECDSA_size(ctx->pkey->pkey.ec);

    if (sig_sz <= 0) {
        return 0;
    }

    if (sig == NULL) {
        *siglen = (size_t)sig_sz;
        return 1;
    }

    if (*siglen < (size_t)sig_sz) {
        SM2err(SM2_F_PKEY_SM2_SIGN, SM2_R_BUFFER_TOO_SMALL);
        return 0;
    }

    ret = sm2_sign(tbs, tbslen, sig, &sltmp, ec);

    if (ret <= 0)
        return ret;
    *siglen = (size_t)sltmp;
    return 1;
}

static int pkey_sm2_verify(EVP_PKEY_CTX *ctx,
                           const unsigned char *sig, size_t siglen,
                           const unsigned char *tbs, size_t tbslen)
{
    EC_KEY *ec = ctx->pkey->pkey.ec;

    return sm2_verify(tbs, tbslen, sig, siglen, ec);
}

static int pkey_sm2_encrypt(EVP_PKEY_CTX *ctx,
                            unsigned char *out, size_t *outlen,
                            const unsigned char *in, size_t inlen)
{
    EC_KEY *ec = ctx->pkey->pkey.ec;
    SM2_PKEY_CTX *dctx = ctx->data;
    const EVP_MD *md = (dctx->md == NULL) ? EVP_sm3() : dctx->md;

    if (out == NULL) {
        if (!sm2_ciphertext_size(ec, md, inlen, outlen))
            return -1;
        else
            return 1;
    }

    return sm2_encrypt(ec, md, in, inlen, out, outlen);
}

static int pkey_sm2_decrypt(EVP_PKEY_CTX *ctx,
                            unsigned char *out, size_t *outlen,
                            const unsigned char *in, size_t inlen)
{
    EC_KEY *ec = ctx->pkey->pkey.ec;
    SM2_PKEY_CTX *dctx = ctx->data;
    const EVP_MD *md = (dctx->md == NULL) ? EVP_sm3() : dctx->md;

    if (out == NULL) {
        if (!sm2_plaintext_size(ec, md, inlen, outlen))
            return -1;
        else
            return 1;
    }

    return sm2_decrypt(ec, md, in, inlen, out, outlen);
}

static int pkey_sm2_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
{
    SM2_PKEY_CTX *smctx = ctx->data;
    uint8_t *tmp_id;

    switch (type) {
    case EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID:
        /*
         * This control could be removed, which would signal it being
         * unsupported.  However, that means that when the caller uses
         * the correct curve, it may interpret the unsupported signal
         * as an error, so it's better to accept the control, check the
         * value and return a corresponding value.
         */
        if (p1 != NID_sm2) {
            SM2err(SM2_F_PKEY_SM2_CTRL, SM2_R_INVALID_CURVE);
            return 0;
        }
        return 1;

    case EVP_PKEY_CTRL_MD:
        smctx->md = p2;
        return 1;

    case EVP_PKEY_CTRL_GET_MD:
        *(const EVP_MD **)p2 = smctx->md;
        return 1;

    case EVP_PKEY_CTRL_SET1_ID:
        if (p1 > 0) {
            tmp_id = OPENSSL_malloc(p1);
            if (tmp_id == NULL) {
                SM2err(SM2_F_PKEY_SM2_CTRL, ERR_R_MALLOC_FAILURE);
                return 0;
            }
            memcpy(tmp_id, p2, p1);
            OPENSSL_free(smctx->id);
            smctx->id = tmp_id;
        } else {
            /* set null-ID */
            OPENSSL_free(smctx->id);
            smctx->id = NULL;
        }
        smctx->id_len = (size_t)p1;
        smctx->id_set = 1;
        return 1;

    case EVP_PKEY_CTRL_GET1_ID:
        memcpy(p2, smctx->id, smctx->id_len);
        return 1;

    case EVP_PKEY_CTRL_GET1_ID_LEN:
        *(size_t *)p2 = smctx->id_len;
        return 1;

    case EVP_PKEY_CTRL_DIGESTINIT:
        /* nothing to be inited, this is to suppress the error... */
        return 1;

    default:
        return -2;
    }
}

static int pkey_sm2_ctrl_str(EVP_PKEY_CTX *ctx,
                             const char *type, const char *value)
{
    uint8_t *hex_id;
    long hex_len = 0;
    int ret = 0;

    if (strcmp(type, "ec_paramgen_curve") == 0) {
        int nid = NID_undef;

        if (((nid = EC_curve_nist2nid(value)) == NID_undef)
            && ((nid = OBJ_sn2nid(value)) == NID_undef)
            && ((nid = OBJ_ln2nid(value)) == NID_undef)) {
            SM2err(SM2_F_PKEY_SM2_CTRL_STR, SM2_R_INVALID_CURVE);
            return 0;
        }
        return EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid);
    } else if (strcmp(type, "ec_param_enc") == 0) {
        int param_enc;

        if (strcmp(value, "explicit") == 0)
            param_enc = 0;
        else if (strcmp(value, "named_curve") == 0)
            param_enc = OPENSSL_EC_NAMED_CURVE;
        else
            return -2;
        return EVP_PKEY_CTX_set_ec_param_enc(ctx, param_enc);
    } else if (strcmp(type, "distid") == 0) {
        return pkey_sm2_ctrl(ctx, EVP_PKEY_CTRL_SET1_ID,
                             (int)strlen(value), (void *)value);
    } else if (strcmp(type, "hexdistid") == 0) {
        hex_id = OPENSSL_hexstr2buf((const char *)value, &hex_len);
        if (hex_id == NULL) {
            SM2err(SM2_F_PKEY_SM2_CTRL_STR, ERR_R_PASSED_INVALID_ARGUMENT);
            return 0;
        }
        ret = pkey_sm2_ctrl(ctx, EVP_PKEY_CTRL_SET1_ID, (int)hex_len,
                            (void *)hex_id);
        OPENSSL_free(hex_id);
        return ret;
    }

    return -2;
}

static int pkey_sm2_digest_custom(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
{
    uint8_t z[EVP_MAX_MD_SIZE];
    SM2_PKEY_CTX *smctx = ctx->data;
    EC_KEY *ec = ctx->pkey->pkey.ec;
    const EVP_MD *md = EVP_MD_CTX_md(mctx);
    int mdlen = EVP_MD_size(md);

    if (!smctx->id_set) {
        /*
         * An ID value must be set. The specifications are not clear whether a
         * NULL is allowed. We only allow it if set explicitly for maximum
         * flexibility.
         */
        SM2err(SM2_F_PKEY_SM2_DIGEST_CUSTOM, SM2_R_ID_NOT_SET);
        return 0;
    }

    if (mdlen < 0) {
        SM2err(SM2_F_PKEY_SM2_DIGEST_CUSTOM, SM2_R_INVALID_DIGEST);
        return 0;
    }

    /* get hashed prefix 'z' of tbs message */
    if (!sm2_compute_z_digest(z, md, smctx->id, smctx->id_len, ec))
        return 0;

    return EVP_DigestUpdate(mctx, z, (size_t)mdlen);
}

static int pkey_sm2_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
    EC_KEY *ec = NULL;
    int ret;

    ec = EC_KEY_new_by_curve_name(NID_sm2);
    if (ec == NULL)
        return 0;
    if (!ossl_assert(ret = EVP_PKEY_assign_EC_KEY(pkey, ec)))
        EC_KEY_free(ec);
    return ret;
}

static int pkey_sm2_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
    EC_KEY *ec = NULL;

    ec = EC_KEY_new_by_curve_name(NID_sm2);
    if (ec == NULL)
        return 0;
    if (!ossl_assert(EVP_PKEY_assign_EC_KEY(pkey, ec))) {
        EC_KEY_free(ec);
        return 0;
    }
    /* Note: if error is returned, we count on caller to free pkey->pkey.ec */
    if (ctx->pkey != NULL
        && !EVP_PKEY_copy_parameters(pkey, ctx->pkey))
        return 0;

    return EC_KEY_generate_key(ec);
}

static const EVP_PKEY_METHOD sm2_pkey_meth = {
    EVP_PKEY_SM2,
    0,
    pkey_sm2_init,
    pkey_sm2_copy,
    pkey_sm2_cleanup,

    0,
    pkey_sm2_paramgen,

    0,
    pkey_sm2_keygen,

    0,
    pkey_sm2_sign,

    0,
    pkey_sm2_verify,

    0, 0,

    0, 0, 0, 0,

    0,
    pkey_sm2_encrypt,

    0,
    pkey_sm2_decrypt,

    0,
    0,
    pkey_sm2_ctrl,
    pkey_sm2_ctrl_str,

    0, 0,

    0, 0, 0,

    pkey_sm2_digest_custom
};

const EVP_PKEY_METHOD *sm2_pkey_method(void)
{
    return &sm2_pkey_meth;
}
Commit	Line	Data
ddb634fe	1	/*
33388b44	2	* Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
ddb634fe	3	*
f9f859ad	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
ddb634fe JL	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
	8	*/
	9
579422c8 P	10	/*
	11	* ECDSA low level APIs are deprecated for public use, but still ok for
	12	* internal use.
	13	*/
	14	#include "internal/deprecated.h"
	15
ddb634fe JL	16	#include "internal/cryptlib.h"
	17	#include <openssl/asn1t.h>
	18	#include <openssl/ec.h>
	19	#include <openssl/evp.h>
25f2138b DMSP	20	#include "crypto/evp.h"
	21	#include "crypto/sm2.h"
	22	#include "crypto/sm2err.h"
ddb634fe JL	23
	24	/* EC pkey context structure */
	25
	26	typedef struct {
ddb634fe JL	27	/* message digest */
ddb634fe JL	28	const EVP_MD *md;
123c2fef	29	/* Distinguishing Identifier, ISO/IEC 15946-3, FIPS 196 */
00433bad PY	30	uint8_t *id;
00433bad PY	31	size_t id_len;
4803717f PY	32	/* id_set indicates if the 'id' field is set (1) or not (0) */
4803717f PY	33	int id_set;
ddb634fe JL	34	} SM2_PKEY_CTX;
	35
	36	static int pkey_sm2_init(EVP_PKEY_CTX *ctx)
	37	{
4803717f	38	SM2_PKEY_CTX *smctx;
ddb634fe	39
4803717f	40	if ((smctx = OPENSSL_zalloc(sizeof(*smctx))) == NULL) {
ddb634fe JL	41	SM2err(SM2_F_PKEY_SM2_INIT, ERR_R_MALLOC_FAILURE);
	42	return 0;
	43	}
	44
4803717f	45	ctx->data = smctx;
ddb634fe JL	46	return 1;
	47	}
	48
	49	static void pkey_sm2_cleanup(EVP_PKEY_CTX *ctx)
	50	{
4803717f	51	SM2_PKEY_CTX *smctx = ctx->data;
ddb634fe	52
4803717f	53	if (smctx != NULL) {
4803717f PY	54	OPENSSL_free(smctx->id);
4803717f PY	55	OPENSSL_free(smctx);
ddb634fe JL	56	ctx->data = NULL;
	57	}
	58	}
	59
9fdcc21f	60	static int pkey_sm2_copy(EVP_PKEY_CTX dst, const EVP_PKEY_CTX src)
ddb634fe JL	61	{
	62	SM2_PKEY_CTX dctx, sctx;
	63
	64	if (!pkey_sm2_init(dst))
	65	return 0;
	66	sctx = src->data;
	67	dctx = dst->data;
4803717f PY	68	if (sctx->id != NULL) {
	69	dctx->id = OPENSSL_malloc(sctx->id_len);
	70	if (dctx->id == NULL) {
f922dac8	71	SM2err(SM2_F_PKEY_SM2_COPY, ERR_R_MALLOC_FAILURE);
4803717f PY	72	pkey_sm2_cleanup(dst);
	73	return 0;
	74	}
	75	memcpy(dctx->id, sctx->id, sctx->id_len);
	76	}
	77	dctx->id_len = sctx->id_len;
	78	dctx->id_set = sctx->id_set;
ddb634fe JL	79	dctx->md = sctx->md;
	80
	81	return 1;
	82	}
	83
	84	static int pkey_sm2_sign(EVP_PKEY_CTX ctx, unsigned char sig, size_t *siglen,
	85	const unsigned char *tbs, size_t tbslen)
	86	{
	87	int ret;
	88	unsigned int sltmp;
	89	EC_KEY *ec = ctx->pkey->pkey.ec;
	90	const int sig_sz = ECDSA_size(ctx->pkey->pkey.ec);
	91
	92	if (sig_sz <= 0) {
	93	return 0;
	94	}
	95
	96	if (sig == NULL) {
	97	*siglen = (size_t)sig_sz;
	98	return 1;
	99	}
	100
	101	if (*siglen < (size_t)sig_sz) {
	102	SM2err(SM2_F_PKEY_SM2_SIGN, SM2_R_BUFFER_TOO_SMALL);
	103	return 0;
	104	}
	105
	106	ret = sm2_sign(tbs, tbslen, sig, &sltmp, ec);
	107
	108	if (ret <= 0)
	109	return ret;
	110	*siglen = (size_t)sltmp;
	111	return 1;
	112	}
	113
	114	static int pkey_sm2_verify(EVP_PKEY_CTX *ctx,
	115	const unsigned char *sig, size_t siglen,
	116	const unsigned char *tbs, size_t tbslen)
	117	{
	118	EC_KEY *ec = ctx->pkey->pkey.ec;
	119
	120	return sm2_verify(tbs, tbslen, sig, siglen, ec);
	121	}
	122
	123	static int pkey_sm2_encrypt(EVP_PKEY_CTX *ctx,
	124	unsigned char out, size_t outlen,
	125	const unsigned char *in, size_t inlen)
	126	{
	127	EC_KEY *ec = ctx->pkey->pkey.ec;
	128	SM2_PKEY_CTX *dctx = ctx->data;
	129	const EVP_MD *md = (dctx->md == NULL) ? EVP_sm3() : dctx->md;
	130
	131	if (out == NULL) {
	132	if (!sm2_ciphertext_size(ec, md, inlen, outlen))
	133	return -1;
	134	else
	135	return 1;
	136	}
	137
	138	return sm2_encrypt(ec, md, in, inlen, out, outlen);
	139	}
	140
	141	static int pkey_sm2_decrypt(EVP_PKEY_CTX *ctx,
	142	unsigned char out, size_t outlen,
143	const unsigned char *in, size_t inlen)
144	{
145	EC_KEY *ec = ctx->pkey->pkey.ec;
146	SM2_PKEY_CTX *dctx = ctx->data;
147	const EVP_MD *md = (dctx->md == NULL) ? EVP_sm3() : dctx->md;
148
149	if (out == NULL) {
150	if (!sm2_plaintext_size(ec, md, inlen, outlen))
151	return -1;
152	else
153	return 1;
154	}
155
156	return sm2_decrypt(ec, md, in, inlen, out, outlen);
157	}
158
159	static int pkey_sm2_ctrl(EVP_PKEY_CTX ctx, int type, int p1, void p2)
160	{
4803717f	161	SM2_PKEY_CTX *smctx = ctx->data;
675f4cee	162	uint8_t *tmp_id;
ddb634fe JL	163
	164	switch (type) {
	165	case EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID:
0943d5dd RL	166	/*
	167	* This control could be removed, which would signal it being
	168	* unsupported. However, that means that when the caller uses
	169	* the correct curve, it may interpret the unsupported signal
	170	* as an error, so it's better to accept the control, check the
	171	* value and return a corresponding value.
	172	*/
	173	if (p1 != NID_sm2) {
ddb634fe JL	174	SM2err(SM2_F_PKEY_SM2_CTRL, SM2_R_INVALID_CURVE);
	175	return 0;
	176	}
ddb634fe JL	177	return 1;
	178
	179	case EVP_PKEY_CTRL_MD:
4803717f	180	smctx->md = p2;
ddb634fe JL	181	return 1;
	182
	183	case EVP_PKEY_CTRL_GET_MD:
4803717f PY	184	(const EVP_MD *)p2 = smctx->md;
	185	return 1;
	186
	187	case EVP_PKEY_CTRL_SET1_ID:
4803717f	188	if (p1 > 0) {
675f4cee	189	tmp_id = OPENSSL_malloc(p1);
f922dac8 PY	190	if (tmp_id == NULL) {
f922dac8 PY	191	SM2err(SM2_F_PKEY_SM2_CTRL, ERR_R_MALLOC_FAILURE);
4803717f	192	return 0;
f922dac8	193	}
675f4cee PY	194	memcpy(tmp_id, p2, p1);
	195	OPENSSL_free(smctx->id);
	196	smctx->id = tmp_id;
4803717f PY	197	} else {
4803717f PY	198	/* set null-ID */
675f4cee	199	OPENSSL_free(smctx->id);
4803717f PY	200	smctx->id = NULL;
	201	}
	202	smctx->id_len = (size_t)p1;
	203	smctx->id_set = 1;
	204	return 1;
	205
	206	case EVP_PKEY_CTRL_GET1_ID:
	207	memcpy(p2, smctx->id, smctx->id_len);
	208	return 1;
	209
	210	case EVP_PKEY_CTRL_GET1_ID_LEN:
	211	(size_t )p2 = smctx->id_len;
ddb634fe JL	212	return 1;
ddb634fe JL	213
8267becb	214	case EVP_PKEY_CTRL_DIGESTINIT:
	215	/* nothing to be inited, this is to suppress the error... */
	216	return 1;
	217
ddb634fe JL	218	default:
ddb634fe JL	219	return -2;
ddb634fe JL	220	}
	221	}
	222
	223	static int pkey_sm2_ctrl_str(EVP_PKEY_CTX *ctx,
	224	const char type, const char value)
	225	{
a45eb7e8 PY	226	uint8_t *hex_id;
	227	long hex_len = 0;
	228	int ret = 0;
	229
ddb634fe JL	230	if (strcmp(type, "ec_paramgen_curve") == 0) {
	231	int nid = NID_undef;
	232
	233	if (((nid = EC_curve_nist2nid(value)) == NID_undef)
	234	&& ((nid = OBJ_sn2nid(value)) == NID_undef)
	235	&& ((nid = OBJ_ln2nid(value)) == NID_undef)) {
	236	SM2err(SM2_F_PKEY_SM2_CTRL_STR, SM2_R_INVALID_CURVE);
	237	return 0;
	238	}
	239	return EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid);
	240	} else if (strcmp(type, "ec_param_enc") == 0) {
	241	int param_enc;
	242
	243	if (strcmp(value, "explicit") == 0)
	244	param_enc = 0;
	245	else if (strcmp(value, "named_curve") == 0)
	246	param_enc = OPENSSL_EC_NAMED_CURVE;
	247	else
	248	return -2;
	249	return EVP_PKEY_CTX_set_ec_param_enc(ctx, param_enc);
123c2fef	250	} else if (strcmp(type, "distid") == 0) {
a7cef52f PY	251	return pkey_sm2_ctrl(ctx, EVP_PKEY_CTRL_SET1_ID,
a7cef52f PY	252	(int)strlen(value), (void *)value);
123c2fef	253	} else if (strcmp(type, "hexdistid") == 0) {
a45eb7e8 PY	254	hex_id = OPENSSL_hexstr2buf((const char *)value, &hex_len);
	255	if (hex_id == NULL) {
	256	SM2err(SM2_F_PKEY_SM2_CTRL_STR, ERR_R_PASSED_INVALID_ARGUMENT);
	257	return 0;
	258	}
	259	ret = pkey_sm2_ctrl(ctx, EVP_PKEY_CTRL_SET1_ID, (int)hex_len,
	260	(void *)hex_id);
	261	OPENSSL_free(hex_id);
	262	return ret;
ddb634fe JL	263	}
	264
	265	return -2;
	266	}
	267
00433bad PY	268	static int pkey_sm2_digest_custom(EVP_PKEY_CTX ctx, EVP_MD_CTX mctx)
	269	{
	270	uint8_t z[EVP_MAX_MD_SIZE];
4803717f	271	SM2_PKEY_CTX *smctx = ctx->data;
00433bad PY	272	EC_KEY *ec = ctx->pkey->pkey.ec;
00433bad PY	273	const EVP_MD *md = EVP_MD_CTX_md(mctx);
d689f313	274	int mdlen = EVP_MD_size(md);
00433bad	275
4803717f PY	276	if (!smctx->id_set) {
	277	/*
	278	* An ID value must be set. The specifications are not clear whether a
	279	* NULL is allowed. We only allow it if set explicitly for maximum
	280	* flexibility.
00433bad	281	*/
675f4cee	282	SM2err(SM2_F_PKEY_SM2_DIGEST_CUSTOM, SM2_R_ID_NOT_SET);
00433bad PY	283	return 0;
	284	}
	285
d689f313 MC	286	if (mdlen < 0) {
	287	SM2err(SM2_F_PKEY_SM2_DIGEST_CUSTOM, SM2_R_INVALID_DIGEST);
	288	return 0;
	289	}
	290
4803717f PY	291	/* get hashed prefix 'z' of tbs message */
4803717f PY	292	if (!sm2_compute_z_digest(z, md, smctx->id, smctx->id_len, ec))
00433bad PY	293	return 0;
00433bad PY	294
d689f313	295	return EVP_DigestUpdate(mctx, z, (size_t)mdlen);
00433bad PY	296	}
00433bad PY	297
0943d5dd RL	298	static int pkey_sm2_paramgen(EVP_PKEY_CTX ctx, EVP_PKEY pkey)
	299	{
	300	EC_KEY *ec = NULL;
	301	int ret;
	302
	303	ec = EC_KEY_new_by_curve_name(NID_sm2);
	304	if (ec == NULL)
	305	return 0;
	306	if (!ossl_assert(ret = EVP_PKEY_assign_EC_KEY(pkey, ec)))
	307	EC_KEY_free(ec);
	308	return ret;
	309	}
	310
	311	static int pkey_sm2_keygen(EVP_PKEY_CTX ctx, EVP_PKEY pkey)
	312	{
	313	EC_KEY *ec = NULL;
	314
	315	ec = EC_KEY_new_by_curve_name(NID_sm2);
	316	if (ec == NULL)
	317	return 0;
	318	if (!ossl_assert(EVP_PKEY_assign_EC_KEY(pkey, ec))) {
	319	EC_KEY_free(ec);
	320	return 0;
	321	}
	322	/* Note: if error is returned, we count on caller to free pkey->pkey.ec */
	323	if (ctx->pkey != NULL
	324	&& !EVP_PKEY_copy_parameters(pkey, ctx->pkey))
	325	return 0;
	326
	327	return EC_KEY_generate_key(ec);
	328	}
	329
19bd1fa1	330	static const EVP_PKEY_METHOD sm2_pkey_meth = {
ddb634fe JL	331	EVP_PKEY_SM2,
	332	0,
	333	pkey_sm2_init,
	334	pkey_sm2_copy,
	335	pkey_sm2_cleanup,
	336
	337	0,
0943d5dd	338	pkey_sm2_paramgen,
ddb634fe JL	339
ddb634fe JL	340	0,
0943d5dd	341	pkey_sm2_keygen,
ddb634fe JL	342
	343	0,
	344	pkey_sm2_sign,
	345
	346	0,
	347	pkey_sm2_verify,
	348
	349	0, 0,
	350
	351	0, 0, 0, 0,
	352
	353	0,
	354	pkey_sm2_encrypt,
	355
	356	0,
	357	pkey_sm2_decrypt,
	358
	359	0,
	360	0,
	361	pkey_sm2_ctrl,
00433bad PY	362	pkey_sm2_ctrl_str,
	363
	364	0, 0,
	365
	366	0, 0, 0,
	367
	368	pkey_sm2_digest_custom
ddb634fe	369	};
19bd1fa1 PS	370
	371	const EVP_PKEY_METHOD *sm2_pkey_method(void)
	372	{
	373	return &sm2_pkey_meth;
	374	}