/* * Copyright 2020-2024 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 */ /* * Low level APIs related to EC_KEY are deprecated for public use, * but still ok for internal use. */ #include "internal/deprecated.h" #include #include #include #include #ifndef FIPS_MODULE # include # include #endif #include "crypto/bn.h" #include "crypto/ec.h" #include "ec_local.h" #include "internal/e_os.h" #include "internal/nelem.h" #include "internal/param_build_set.h" /* Mapping between a flag and a name */ static const OSSL_ITEM encoding_nameid_map[] = { { OPENSSL_EC_EXPLICIT_CURVE, OSSL_PKEY_EC_ENCODING_EXPLICIT }, { OPENSSL_EC_NAMED_CURVE, OSSL_PKEY_EC_ENCODING_GROUP }, }; static const OSSL_ITEM check_group_type_nameid_map[] = { { 0, OSSL_PKEY_EC_GROUP_CHECK_DEFAULT }, { EC_FLAG_CHECK_NAMED_GROUP, OSSL_PKEY_EC_GROUP_CHECK_NAMED }, { EC_FLAG_CHECK_NAMED_GROUP_NIST, OSSL_PKEY_EC_GROUP_CHECK_NAMED_NIST }, }; static const OSSL_ITEM format_nameid_map[] = { { (int)POINT_CONVERSION_UNCOMPRESSED, OSSL_PKEY_EC_POINT_CONVERSION_FORMAT_UNCOMPRESSED }, { (int)POINT_CONVERSION_COMPRESSED, OSSL_PKEY_EC_POINT_CONVERSION_FORMAT_COMPRESSED }, { (int)POINT_CONVERSION_HYBRID, OSSL_PKEY_EC_POINT_CONVERSION_FORMAT_HYBRID }, }; int ossl_ec_encoding_name2id(const char *name) { size_t i, sz; /* Return the default value if there is no name */ if (name == NULL) return OPENSSL_EC_NAMED_CURVE; for (i = 0, sz = OSSL_NELEM(encoding_nameid_map); i < sz; i++) { if (OPENSSL_strcasecmp(name, encoding_nameid_map[i].ptr) == 0) return encoding_nameid_map[i].id; } return -1; } static char *ec_param_encoding_id2name(int id) { size_t i, sz; for (i = 0, sz = OSSL_NELEM(encoding_nameid_map); i < sz; i++) { if (id == (int)encoding_nameid_map[i].id) return encoding_nameid_map[i].ptr; } return NULL; } char *ossl_ec_check_group_type_id2name(int id) { size_t i, sz; for (i = 0, sz = OSSL_NELEM(check_group_type_nameid_map); i < sz; i++) { if (id == (int)check_group_type_nameid_map[i].id) return check_group_type_nameid_map[i].ptr; } return NULL; } static int ec_check_group_type_name2id(const char *name) { size_t i, sz; /* Return the default value if there is no name */ if (name == NULL) return 0; for (i = 0, sz = OSSL_NELEM(check_group_type_nameid_map); i < sz; i++) { if (OPENSSL_strcasecmp(name, check_group_type_nameid_map[i].ptr) == 0) return check_group_type_nameid_map[i].id; } return -1; } int ossl_ec_set_check_group_type_from_name(EC_KEY *ec, const char *name) { int flags = ec_check_group_type_name2id(name); if (flags == -1) return 0; EC_KEY_clear_flags(ec, EC_FLAG_CHECK_NAMED_GROUP_MASK); EC_KEY_set_flags(ec, flags); return 1; } static int ec_set_check_group_type_from_param(EC_KEY *ec, const OSSL_PARAM *p) { const char *name = NULL; int status = 0; switch (p->data_type) { case OSSL_PARAM_UTF8_STRING: name = p->data; status = (name != NULL); break; case OSSL_PARAM_UTF8_PTR: status = OSSL_PARAM_get_utf8_ptr(p, &name); break; } if (status) return ossl_ec_set_check_group_type_from_name(ec, name); return 0; } int ossl_ec_pt_format_name2id(const char *name) { size_t i, sz; /* Return the default value if there is no name */ if (name == NULL) return (int)POINT_CONVERSION_UNCOMPRESSED; for (i = 0, sz = OSSL_NELEM(format_nameid_map); i < sz; i++) { if (OPENSSL_strcasecmp(name, format_nameid_map[i].ptr) == 0) return format_nameid_map[i].id; } return -1; } char *ossl_ec_pt_format_id2name(int id) { size_t i, sz; for (i = 0, sz = OSSL_NELEM(format_nameid_map); i < sz; i++) { if (id == (int)format_nameid_map[i].id) return format_nameid_map[i].ptr; } return NULL; } static int ec_group_explicit_todata(const EC_GROUP *group, OSSL_PARAM_BLD *tmpl, OSSL_PARAM params[], BN_CTX *bnctx, unsigned char **genbuf) { int ret = 0, fid; const char *field_type; const OSSL_PARAM *param = NULL; const OSSL_PARAM *param_p = NULL; const OSSL_PARAM *param_a = NULL; const OSSL_PARAM *param_b = NULL; fid = EC_GROUP_get_field_type(group); if (fid == NID_X9_62_prime_field) { field_type = SN_X9_62_prime_field; } else if (fid == NID_X9_62_characteristic_two_field) { #ifdef OPENSSL_NO_EC2M ERR_raise(ERR_LIB_EC, EC_R_GF2M_NOT_SUPPORTED); goto err; #else field_type = SN_X9_62_characteristic_two_field; #endif } else { ERR_raise(ERR_LIB_EC, EC_R_INVALID_FIELD); return 0; } param_p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_P); param_a = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_A); param_b = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_B); if (tmpl != NULL || param_p != NULL || param_a != NULL || param_b != NULL) { BIGNUM *p = BN_CTX_get(bnctx); BIGNUM *a = BN_CTX_get(bnctx); BIGNUM *b = BN_CTX_get(bnctx); if (b == NULL) { ERR_raise(ERR_LIB_EC, ERR_R_BN_LIB); goto err; } if (!EC_GROUP_get_curve(group, p, a, b, bnctx)) { ERR_raise(ERR_LIB_EC, EC_R_INVALID_CURVE); goto err; } if (!ossl_param_build_set_bn(tmpl, params, OSSL_PKEY_PARAM_EC_P, p) || !ossl_param_build_set_bn(tmpl, params, OSSL_PKEY_PARAM_EC_A, a) || !ossl_param_build_set_bn(tmpl, params, OSSL_PKEY_PARAM_EC_B, b)) { ERR_raise(ERR_LIB_EC, ERR_R_CRYPTO_LIB); goto err; } } param = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_ORDER); if (tmpl != NULL || param != NULL) { const BIGNUM *order = EC_GROUP_get0_order(group); if (order == NULL) { ERR_raise(ERR_LIB_EC, EC_R_INVALID_GROUP_ORDER); goto err; } if (!ossl_param_build_set_bn(tmpl, params, OSSL_PKEY_PARAM_EC_ORDER, order)) { ERR_raise(ERR_LIB_EC, ERR_R_CRYPTO_LIB); goto err; } } param = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_FIELD_TYPE); if (tmpl != NULL || param != NULL) { if (!ossl_param_build_set_utf8_string(tmpl, params, OSSL_PKEY_PARAM_EC_FIELD_TYPE, field_type)) { ERR_raise(ERR_LIB_EC, ERR_R_CRYPTO_LIB); goto err; } } param = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_GENERATOR); if (tmpl != NULL || param != NULL) { size_t genbuf_len; const EC_POINT *genpt = EC_GROUP_get0_generator(group); point_conversion_form_t genform = EC_GROUP_get_point_conversion_form(group); if (genpt == NULL) { ERR_raise(ERR_LIB_EC, EC_R_INVALID_GENERATOR); goto err; } genbuf_len = EC_POINT_point2buf(group, genpt, genform, genbuf, bnctx); if (genbuf_len == 0) { ERR_raise(ERR_LIB_EC, EC_R_INVALID_GENERATOR); goto err; } if (!ossl_param_build_set_octet_string(tmpl, params, OSSL_PKEY_PARAM_EC_GENERATOR, *genbuf, genbuf_len)) { ERR_raise(ERR_LIB_EC, ERR_R_CRYPTO_LIB); goto err; } } param = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_COFACTOR); if (tmpl != NULL || param != NULL) { const BIGNUM *cofactor = EC_GROUP_get0_cofactor(group); if (cofactor != NULL && !ossl_param_build_set_bn(tmpl, params, OSSL_PKEY_PARAM_EC_COFACTOR, cofactor)) { ERR_raise(ERR_LIB_EC, ERR_R_CRYPTO_LIB); goto err; } } param = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_SEED); if (tmpl != NULL || param != NULL) { unsigned char *seed = EC_GROUP_get0_seed(group); size_t seed_len = EC_GROUP_get_seed_len(group); if (seed != NULL && seed_len > 0 && !ossl_param_build_set_octet_string(tmpl, params, OSSL_PKEY_PARAM_EC_SEED, seed, seed_len)) { ERR_raise(ERR_LIB_EC, ERR_R_CRYPTO_LIB); goto err; } } ret = 1; err: return ret; } int ossl_ec_group_todata(const EC_GROUP *group, OSSL_PARAM_BLD *tmpl, OSSL_PARAM params[], OSSL_LIB_CTX *libctx, const char *propq, BN_CTX *bnctx, unsigned char **genbuf) { int ret = 0, curve_nid, encoding_flag; const char *encoding_name, *pt_form_name; point_conversion_form_t genform; if (group == NULL) { ERR_raise(ERR_LIB_EC, EC_R_PASSED_NULL_PARAMETER); return 0; } genform = EC_GROUP_get_point_conversion_form(group); pt_form_name = ossl_ec_pt_format_id2name(genform); if (pt_form_name == NULL || !ossl_param_build_set_utf8_string( tmpl, params, OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT, pt_form_name)) { ERR_raise(ERR_LIB_EC, EC_R_INVALID_FORM); return 0; } encoding_flag = EC_GROUP_get_asn1_flag(group) & OPENSSL_EC_NAMED_CURVE; encoding_name = ec_param_encoding_id2name(encoding_flag); if (encoding_name == NULL || !ossl_param_build_set_utf8_string(tmpl, params, OSSL_PKEY_PARAM_EC_ENCODING, encoding_name)) { ERR_raise(ERR_LIB_EC, EC_R_INVALID_ENCODING); return 0; } if (!ossl_param_build_set_int(tmpl, params, OSSL_PKEY_PARAM_EC_DECODED_FROM_EXPLICIT_PARAMS, group->decoded_from_explicit_params)) return 0; curve_nid = EC_GROUP_get_curve_name(group); /* * Get the explicit parameters in these two cases: * - We do not have a template, i.e. specific parameters are requested * - The curve is not a named curve */ if (tmpl == NULL || curve_nid == NID_undef) if (!ec_group_explicit_todata(group, tmpl, params, bnctx, genbuf)) goto err; if (curve_nid != NID_undef) { /* Named curve */ const char *curve_name = OSSL_EC_curve_nid2name(curve_nid); if (curve_name == NULL || !ossl_param_build_set_utf8_string(tmpl, params, OSSL_PKEY_PARAM_GROUP_NAME, curve_name)) { ERR_raise(ERR_LIB_EC, EC_R_INVALID_CURVE); goto err; } } ret = 1; err: return ret; } /* * The intention with the "backend" source file is to offer backend support * for legacy backends (EVP_PKEY_ASN1_METHOD and EVP_PKEY_METHOD) and provider * implementations alike. */ int ossl_ec_set_ecdh_cofactor_mode(EC_KEY *ec, int mode) { const EC_GROUP *ecg = EC_KEY_get0_group(ec); const BIGNUM *cofactor; /* * mode can be only 0 for disable, or 1 for enable here. * * This is in contrast with the same parameter on an ECDH EVP_PKEY_CTX that * also supports mode == -1 with the meaning of "reset to the default for * the associated key". */ if (mode < 0 || mode > 1) return 0; if ((cofactor = EC_GROUP_get0_cofactor(ecg)) == NULL ) return 0; /* ECDH cofactor mode has no effect if cofactor is 1 */ if (BN_is_one(cofactor)) return 1; if (mode == 1) EC_KEY_set_flags(ec, EC_FLAG_COFACTOR_ECDH); else if (mode == 0) EC_KEY_clear_flags(ec, EC_FLAG_COFACTOR_ECDH); return 1; } /* * Callers of ossl_ec_key_fromdata MUST make sure that ec_key_params_fromdata has * been called before! * * This function only gets the bare keypair, domain parameters and other * parameters are treated separately, and domain parameters are required to * define a keypair. */ int ossl_ec_key_fromdata(EC_KEY *ec, const OSSL_PARAM params[], int include_private) { const OSSL_PARAM *param_priv_key = NULL, *param_pub_key = NULL; BN_CTX *ctx = NULL; BIGNUM *priv_key = NULL; unsigned char *pub_key = NULL; size_t pub_key_len; const EC_GROUP *ecg = NULL; EC_POINT *pub_point = NULL; int ok = 0; ecg = EC_KEY_get0_group(ec); if (ecg == NULL) return 0; param_pub_key = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY); if (include_private) param_priv_key = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY); ctx = BN_CTX_new_ex(ossl_ec_key_get_libctx(ec)); if (ctx == NULL) goto err; if (param_pub_key != NULL) if (!OSSL_PARAM_get_octet_string(param_pub_key, (void **)&pub_key, 0, &pub_key_len) || (pub_point = EC_POINT_new(ecg)) == NULL || !EC_POINT_oct2point(ecg, pub_point, pub_key, pub_key_len, ctx)) goto err; if (param_priv_key != NULL && include_private) { int fixed_words; const BIGNUM *order; /* * Key import/export should never leak the bit length of the secret * scalar in the key. * * For this reason, on export we use padded BIGNUMs with fixed length. * * When importing we also should make sure that, even if short lived, * the newly created BIGNUM is marked with the BN_FLG_CONSTTIME flag as * soon as possible, so that any processing of this BIGNUM might opt for * constant time implementations in the backend. * * Setting the BN_FLG_CONSTTIME flag alone is never enough, we also have * to preallocate the BIGNUM internal buffer to a fixed public size big * enough that operations performed during the processing never trigger * a realloc which would leak the size of the scalar through memory * accesses. * * Fixed Length * ------------ * * The order of the large prime subgroup of the curve is our choice for * a fixed public size, as that is generally the upper bound for * generating a private key in EC cryptosystems and should fit all valid * secret scalars. * * For padding on export we just use the bit length of the order * converted to bytes (rounding up). * * For preallocating the BIGNUM storage we look at the number of "words" * required for the internal representation of the order, and we * preallocate 2 extra "words" in case any of the subsequent processing * might temporarily overflow the order length. */ order = EC_GROUP_get0_order(ecg); if (order == NULL || BN_is_zero(order)) goto err; fixed_words = bn_get_top(order) + 2; if ((priv_key = BN_secure_new()) == NULL) goto err; if (bn_wexpand(priv_key, fixed_words) == NULL) goto err; BN_set_flags(priv_key, BN_FLG_CONSTTIME); if (!OSSL_PARAM_get_BN(param_priv_key, &priv_key)) goto err; } if (priv_key != NULL && !EC_KEY_set_private_key(ec, priv_key)) goto err; if (pub_point != NULL && !EC_KEY_set_public_key(ec, pub_point)) goto err; ok = 1; err: BN_CTX_free(ctx); BN_clear_free(priv_key); OPENSSL_free(pub_key); EC_POINT_free(pub_point); return ok; } int ossl_ec_group_fromdata(EC_KEY *ec, const OSSL_PARAM params[]) { int ok = 0; EC_GROUP *group = NULL; if (ec == NULL) return 0; group = EC_GROUP_new_from_params(params, ossl_ec_key_get_libctx(ec), ossl_ec_key_get0_propq(ec)); if (!EC_KEY_set_group(ec, group)) goto err; ok = 1; err: EC_GROUP_free(group); return ok; } static int ec_key_point_format_fromdata(EC_KEY *ec, const OSSL_PARAM params[]) { const OSSL_PARAM *p; int format = -1; p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT); if (p != NULL) { if (!ossl_ec_pt_format_param2id(p, &format)) { ERR_raise(ERR_LIB_EC, EC_R_INVALID_FORM); return 0; } EC_KEY_set_conv_form(ec, format); } return 1; } static int ec_key_group_check_fromdata(EC_KEY *ec, const OSSL_PARAM params[]) { const OSSL_PARAM *p; p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_GROUP_CHECK_TYPE); if (p != NULL) return ec_set_check_group_type_from_param(ec, p); return 1; } static int ec_set_include_public(EC_KEY *ec, int include) { int flags = EC_KEY_get_enc_flags(ec); if (!include) flags |= EC_PKEY_NO_PUBKEY; else flags &= ~EC_PKEY_NO_PUBKEY; EC_KEY_set_enc_flags(ec, flags); return 1; } int ossl_ec_key_otherparams_fromdata(EC_KEY *ec, const OSSL_PARAM params[]) { const OSSL_PARAM *p; if (ec == NULL) return 0; p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_USE_COFACTOR_ECDH); if (p != NULL) { int mode; if (!OSSL_PARAM_get_int(p, &mode) || !ossl_ec_set_ecdh_cofactor_mode(ec, mode)) return 0; } p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_INCLUDE_PUBLIC); if (p != NULL) { int include = 1; if (!OSSL_PARAM_get_int(p, &include) || !ec_set_include_public(ec, include)) return 0; } if (!ec_key_point_format_fromdata(ec, params)) return 0; if (!ec_key_group_check_fromdata(ec, params)) return 0; return 1; } int ossl_ec_key_is_foreign(const EC_KEY *ec) { #ifndef FIPS_MODULE if (ec->engine != NULL || EC_KEY_get_method(ec) != EC_KEY_OpenSSL()) return 1; #endif return 0; } EC_KEY *ossl_ec_key_dup(const EC_KEY *src, int selection) { EC_KEY *ret; if (src == NULL) { ERR_raise(ERR_LIB_EC, ERR_R_PASSED_NULL_PARAMETER); return NULL; } if ((ret = ossl_ec_key_new_method_int(src->libctx, src->propq, src->engine)) == NULL) return NULL; /* copy the parameters */ if (src->group != NULL && (selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) { ret->group = ossl_ec_group_new_ex(src->libctx, src->propq, src->group->meth); if (ret->group == NULL || !EC_GROUP_copy(ret->group, src->group)) goto err; if (src->meth != NULL) ret->meth = src->meth; } /* copy the public key */ if (src->pub_key != NULL && (selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) { if (ret->group == NULL) /* no parameter-less keys allowed */ goto err; ret->pub_key = EC_POINT_new(ret->group); if (ret->pub_key == NULL || !EC_POINT_copy(ret->pub_key, src->pub_key)) goto err; } /* copy the private key */ if (src->priv_key != NULL && (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) { if (ret->group == NULL) /* no parameter-less keys allowed */ goto err; ret->priv_key = BN_new(); if (ret->priv_key == NULL || !BN_copy(ret->priv_key, src->priv_key)) goto err; if (ret->group->meth->keycopy && ret->group->meth->keycopy(ret, src) == 0) goto err; } /* copy the rest */ if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0) { ret->enc_flag = src->enc_flag; ret->conv_form = src->conv_form; } ret->version = src->version; ret->flags = src->flags; #ifndef FIPS_MODULE if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_EC_KEY, &ret->ex_data, &src->ex_data)) goto err; #endif if (ret->meth != NULL && ret->meth->copy != NULL) { if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != OSSL_KEYMGMT_SELECT_KEYPAIR) goto err; if (ret->meth->copy(ret, src) == 0) goto err; } return ret; err: EC_KEY_free(ret); return NULL; } int ossl_ec_encoding_param2id(const OSSL_PARAM *p, int *id) { const char *name = NULL; int status = 0; switch (p->data_type) { case OSSL_PARAM_UTF8_STRING: /* The OSSL_PARAM functions have no support for this */ name = p->data; status = (name != NULL); break; case OSSL_PARAM_UTF8_PTR: status = OSSL_PARAM_get_utf8_ptr(p, &name); break; } if (status) { int i = ossl_ec_encoding_name2id(name); if (i >= 0) { *id = i; return 1; } } return 0; } int ossl_ec_pt_format_param2id(const OSSL_PARAM *p, int *id) { const char *name = NULL; int status = 0; switch (p->data_type) { case OSSL_PARAM_UTF8_STRING: /* The OSSL_PARAM functions have no support for this */ name = p->data; status = (name != NULL); break; case OSSL_PARAM_UTF8_PTR: status = OSSL_PARAM_get_utf8_ptr(p, &name); break; } if (status) { int i = ossl_ec_pt_format_name2id(name); if (i >= 0) { *id = i; return 1; } } return 0; } #ifndef FIPS_MODULE int ossl_x509_algor_is_sm2(const X509_ALGOR *palg) { int ptype = 0; const void *pval = NULL; X509_ALGOR_get0(NULL, &ptype, &pval, palg); if (ptype == V_ASN1_OBJECT) return OBJ_obj2nid((ASN1_OBJECT *)pval) == NID_sm2; if (ptype == V_ASN1_SEQUENCE) { const ASN1_STRING *str = pval; const unsigned char *der = str->data; int derlen = str->length; EC_GROUP *group; int ret; if ((group = d2i_ECPKParameters(NULL, &der, derlen)) == NULL) ret = 0; else ret = (EC_GROUP_get_curve_name(group) == NID_sm2); EC_GROUP_free(group); return ret; } return 0; } EC_KEY *ossl_ec_key_param_from_x509_algor(const X509_ALGOR *palg, OSSL_LIB_CTX *libctx, const char *propq) { int ptype = 0; const void *pval = NULL; EC_KEY *eckey = NULL; EC_GROUP *group = NULL; X509_ALGOR_get0(NULL, &ptype, &pval, palg); if ((eckey = EC_KEY_new_ex(libctx, propq)) == NULL) { ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); goto ecerr; } if (ptype == V_ASN1_SEQUENCE) { const ASN1_STRING *pstr = pval; const unsigned char *pm = pstr->data; int pmlen = pstr->length; if (d2i_ECParameters(&eckey, &pm, pmlen) == NULL) { ERR_raise(ERR_LIB_EC, EC_R_DECODE_ERROR); goto ecerr; } } else if (ptype == V_ASN1_OBJECT) { const ASN1_OBJECT *poid = pval; /* * type == V_ASN1_OBJECT => the parameters are given by an asn1 OID */ group = EC_GROUP_new_by_curve_name_ex(libctx, propq, OBJ_obj2nid(poid)); if (group == NULL) goto ecerr; EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE); if (EC_KEY_set_group(eckey, group) == 0) goto ecerr; EC_GROUP_free(group); } else { ERR_raise(ERR_LIB_EC, EC_R_DECODE_ERROR); goto ecerr; } return eckey; ecerr: EC_KEY_free(eckey); EC_GROUP_free(group); return NULL; } EC_KEY *ossl_ec_key_from_pkcs8(const PKCS8_PRIV_KEY_INFO *p8inf, OSSL_LIB_CTX *libctx, const char *propq) { const unsigned char *p = NULL; int pklen; EC_KEY *eckey = NULL; const X509_ALGOR *palg; if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8inf)) return 0; eckey = ossl_ec_key_param_from_x509_algor(palg, libctx, propq); if (eckey == NULL) goto err; /* We have parameters now set private key */ if (!d2i_ECPrivateKey(&eckey, &p, pklen)) { ERR_raise(ERR_LIB_EC, EC_R_DECODE_ERROR); goto err; } return eckey; err: EC_KEY_free(eckey); return NULL; } #endif