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/core_names.h>
11 #include "crypto/dsa.h"
14 * The intention with the "backend" source file is to offer backend support
15 * for legacy backends (EVP_PKEY_ASN1_METHOD and EVP_PKEY_METHOD) and provider
16 * implementations alike.
19 int dsa_key_fromdata(DSA *dsa, const OSSL_PARAM params[])
21 const OSSL_PARAM *param_priv_key, *param_pub_key;
22 BIGNUM *priv_key = NULL, *pub_key = NULL;
28 OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
30 OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY);
32 /* It's ok if neither half is present */
33 if (param_priv_key == NULL && param_pub_key == NULL)
37 * DSA documentation says that a public key must be present if a
38 * private key is present.
40 if (param_priv_key != NULL && param_pub_key == NULL)
43 if (param_pub_key != NULL && !OSSL_PARAM_get_BN(param_pub_key, &pub_key))
45 if (param_priv_key != NULL && !OSSL_PARAM_get_BN(param_priv_key, &priv_key))
48 if (!DSA_set0_key(dsa, pub_key, priv_key))
54 BN_clear_free(priv_key);