2 * Copyright 2019 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_numbers.h>
11 #include <openssl/core_names.h>
12 #include <openssl/bn.h>
13 #include <openssl/dsa.h>
14 #include <openssl/params.h>
15 #include "internal/provider_algs.h"
17 static OSSL_OP_keymgmt_importkey_fn dsa_importkey;
19 static int params_to_key(DSA *dsa, const OSSL_PARAM params[])
21 const OSSL_PARAM *param_p, *param_q, *param_g, *param_priv_key;
22 const OSSL_PARAM *param_pub_key;
23 BIGNUM *p = NULL, *q = NULL, *g = NULL, *priv_key = NULL, *pub_key = NULL;
28 param_p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_P);
29 param_q = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_Q);
30 param_g = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_G);
32 OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DSA_PRIV_KEY);
34 OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DSA_PUB_KEY);
37 * DSA documentation says that a public key must be present if a private key
40 if (param_priv_key != NULL && param_pub_key == NULL)
43 if ((param_p != NULL && !OSSL_PARAM_get_BN(param_p, &p))
44 || (param_q != NULL && !OSSL_PARAM_get_BN(param_q, &q))
45 || (param_g != NULL && !OSSL_PARAM_get_BN(param_g, &g))
46 || (param_priv_key != NULL
47 && !OSSL_PARAM_get_BN(param_priv_key, &priv_key))
48 || (param_pub_key != NULL
49 && !OSSL_PARAM_get_BN(param_pub_key, &pub_key)))
52 if (!DSA_set0_pqg(dsa, p, q, g))
56 if (pub_key != NULL && !DSA_set0_key(dsa, pub_key, priv_key))
58 priv_key = pub_key = NULL;
71 static void *dsa_importkey(void *provctx, const OSSL_PARAM params[])
75 if ((dsa = DSA_new()) == NULL
76 || !params_to_key(dsa, params)) {
83 const OSSL_DISPATCH dsa_keymgmt_functions[] = {
85 * TODO(3.0) When implementing OSSL_FUNC_KEYMGMT_GENKEY, remember to also
86 * implement OSSL_FUNC_KEYMGMT_EXPORTKEY.
88 { OSSL_FUNC_KEYMGMT_IMPORTKEY, (void (*)(void))dsa_importkey },
89 { OSSL_FUNC_KEYMGMT_FREEKEY, (void (*)(void))DSA_free },