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Commit | Line | Data |
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9e49aff2 | 1 | /* |
4333b89f | 2 | * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved. |
9e49aff2 NT |
3 | * |
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 | |
8 | */ | |
9 | ||
5b5eea4b SL |
10 | #include "internal/deprecated.h" /* to be able to use EC_KEY and EC_GROUP */ |
11 | ||
9e49aff2 NT |
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 */ | |
16 | ||
17 | /* | |
18 | * SM2 key generation is implemented within ec_generate_key() in | |
19 | * crypto/ec/ec_key.c | |
20 | */ | |
21 | ||
32ab57cb | 22 | int ossl_sm2_key_private_check(const EC_KEY *eckey) |
9e49aff2 NT |
23 | { |
24 | int ret = 0; | |
25 | BIGNUM *max = NULL; | |
26 | const EC_GROUP *group = NULL; | |
27 | const BIGNUM *priv_key = NULL, *order = NULL; | |
28 | ||
29 | if (eckey == NULL | |
30 | || (group = EC_KEY_get0_group(eckey)) == NULL | |
31 | || (priv_key = EC_KEY_get0_private_key(eckey)) == NULL | |
1287dabd | 32 | || (order = EC_GROUP_get0_order(group)) == NULL) { |
9e49aff2 NT |
33 | ERR_raise(ERR_LIB_SM2, ERR_R_PASSED_NULL_PARAMETER); |
34 | return 0; | |
35 | } | |
36 | ||
37 | /* range of SM2 private key is [1, n-1) */ | |
38 | max = BN_dup(order); | |
39 | if (max == NULL || !BN_sub_word(max, 1)) | |
40 | goto end; | |
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); | |
44 | goto end; | |
45 | } | |
46 | ret = 1; | |
47 | ||
48 | end: | |
49 | BN_free(max); | |
50 | return ret; | |
51 | } |