| /* |
| * 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; |
| } |