Viewing file:  sm2_key.c (1.45 KB) -rw-r--r--
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/*
* Copyright 2020-2021 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
*/
#include "internal/deprecated.h" /* to be able to use EC_KEY and EC_GROUP */
#include <openssl/err.h>
#include "crypto/sm2err.h"
#include "crypto/sm2.h"
#include <openssl/ec.h> /* EC_KEY and EC_GROUP functions */
/*
* SM2 key generation is implemented within ec_generate_key() in
* crypto/ec/ec_key.c
*/
int ossl_sm2_key_private_check(const EC_KEY *eckey)
{
int ret = 0;
BIGNUM *max = NULL;
const EC_GROUP *group = NULL;
const BIGNUM *priv_key = NULL, *order = NULL;
if (eckey == NULL
|| (group = EC_KEY_get0_group(eckey)) == NULL
|| (priv_key = EC_KEY_get0_private_key(eckey)) == NULL
|| (order = EC_GROUP_get0_order(group)) == NULL) {
ERR_raise(ERR_LIB_SM2, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
/* range of SM2 private key is [1, n-1) */
max = BN_dup(order);
if (max == NULL || !BN_sub_word(max, 1))
goto end;
if (BN_cmp(priv_key, BN_value_one()) < 0
|| BN_cmp(priv_key, max) >= 0) {
ERR_raise(ERR_LIB_SM2, SM2_R_INVALID_PRIVATE_KEY);
goto end;
}
ret = 1;
end:
BN_free(max);
return ret;
}
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