2 * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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
10 #include "internal/deprecated.h" /* to be able to use EC_KEY and EC_GROUP */
12 #include <openssl/err.h>
13 #include "crypto/sm2err.h"
14 #include "crypto/sm2.h"
15 #include <openssl/ec.h> /* EC_KEY and EC_GROUP functions */
18 * SM2 key generation is implemented within ec_generate_key() in
22 int ossl_sm2_key_private_check(const EC_KEY *eckey)
26 const EC_GROUP *group = NULL;
27 const BIGNUM *priv_key = NULL, *order = NULL;
30 || (group = EC_KEY_get0_group(eckey)) == NULL
31 || (priv_key = EC_KEY_get0_private_key(eckey)) == NULL
32 || (order = EC_GROUP_get0_order(group)) == NULL ) {
33 ERR_raise(ERR_LIB_SM2, ERR_R_PASSED_NULL_PARAMETER);
37 /* range of SM2 private key is [1, n-1) */
39 if (max == NULL || !BN_sub_word(max, 1))
41 if (BN_cmp(priv_key, BN_value_one()) < 0
42 || BN_cmp(priv_key, max) >= 0) {
43 ERR_raise(ERR_LIB_SM2, SM2_R_INVALID_PRIVATE_KEY);