2 * Copyright 2020 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 <openssl/err.h>
11 #include "crypto/sm2err.h"
12 #include "crypto/sm2.h"
13 #include <openssl/ec.h> /* EC_KEY and EC_GROUP functions */
16 * SM2 key generation is implemented within ec_generate_key() in
20 int sm2_key_private_check(const EC_KEY
*eckey
)
24 const EC_GROUP
*group
= NULL
;
25 const BIGNUM
*priv_key
= NULL
, *order
= NULL
;
28 || (group
= EC_KEY_get0_group(eckey
)) == NULL
29 || (priv_key
= EC_KEY_get0_private_key(eckey
)) == NULL
30 || (order
= EC_GROUP_get0_order(group
)) == NULL
) {
31 ERR_raise(ERR_LIB_SM2
, ERR_R_PASSED_NULL_PARAMETER
);
35 /* range of SM2 private key is [1, n-1) */
37 if (max
== NULL
|| !BN_sub_word(max
, 1))
39 if (BN_cmp(priv_key
, BN_value_one()) < 0
40 || BN_cmp(priv_key
, max
) >= 0) {
41 ERR_raise(ERR_LIB_SM2
, SM2_R_INVALID_PRIVATE_KEY
);