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0abae163 | 1 | /* |
4333b89f | 2 | * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved. |
0abae163 RL |
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 | ||
52c8535a P |
10 | /* |
11 | * DSA low level APIs are deprecated for public use, but still ok for | |
12 | * internal use. | |
13 | */ | |
14 | #include "internal/deprecated.h" | |
15 | ||
0abae163 RL |
16 | #include <openssl/core_names.h> |
17 | #include "crypto/dsa.h" | |
18 | ||
19 | /* | |
20 | * The intention with the "backend" source file is to offer backend support | |
21 | * for legacy backends (EVP_PKEY_ASN1_METHOD and EVP_PKEY_METHOD) and provider | |
22 | * implementations alike. | |
23 | */ | |
24 | ||
25 | int dsa_key_fromdata(DSA *dsa, const OSSL_PARAM params[]) | |
26 | { | |
27 | const OSSL_PARAM *param_priv_key, *param_pub_key; | |
28 | BIGNUM *priv_key = NULL, *pub_key = NULL; | |
29 | ||
30 | if (dsa == NULL) | |
31 | return 0; | |
32 | ||
33 | param_priv_key = | |
34 | OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY); | |
35 | param_pub_key = | |
36 | OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY); | |
37 | ||
38 | /* It's ok if neither half is present */ | |
39 | if (param_priv_key == NULL && param_pub_key == NULL) | |
40 | return 1; | |
41 | ||
0abae163 RL |
42 | if (param_pub_key != NULL && !OSSL_PARAM_get_BN(param_pub_key, &pub_key)) |
43 | goto err; | |
44 | if (param_priv_key != NULL && !OSSL_PARAM_get_BN(param_priv_key, &priv_key)) | |
45 | goto err; | |
46 | ||
47 | if (!DSA_set0_key(dsa, pub_key, priv_key)) | |
48 | goto err; | |
49 | ||
50 | return 1; | |
51 | ||
52 | err: | |
53 | BN_clear_free(priv_key); | |
54 | BN_free(pub_key); | |
55 | return 0; | |
56 | } |