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 "prov/implementations.h"
17 static OSSL_OP_keymgmt_importdomparams_fn dsa_importdomparams;
18 static OSSL_OP_keymgmt_exportdomparams_fn dsa_exportdomparams;
19 static OSSL_OP_keymgmt_importkey_fn dsa_importkey;
20 static OSSL_OP_keymgmt_exportkey_fn dsa_exportkey;
22 static int params_to_domparams(DSA *dsa, const OSSL_PARAM params[])
24 const OSSL_PARAM *param_p, *param_q, *param_g;
25 BIGNUM *p = NULL, *q = NULL, *g = NULL;
30 param_p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_P);
31 param_q = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_Q);
32 param_g = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_G);
34 if ((param_p != NULL && !OSSL_PARAM_get_BN(param_p, &p))
35 || (param_q != NULL && !OSSL_PARAM_get_BN(param_q, &q))
36 || (param_g != NULL && !OSSL_PARAM_get_BN(param_g, &g)))
39 if (!DSA_set0_pqg(dsa, p, q, g))
51 static int domparams_to_params(DSA *dsa, OSSL_PARAM params[])
54 const BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL;
59 DSA_get0_pqg(dsa, &dsa_p, &dsa_q, &dsa_g);
60 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_FFC_P)) != NULL
61 && !OSSL_PARAM_set_BN(p, dsa_p))
63 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_FFC_Q)) != NULL
64 && !OSSL_PARAM_set_BN(p, dsa_q))
66 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_FFC_G)) != NULL
67 && !OSSL_PARAM_set_BN(p, dsa_g))
73 static int params_to_key(DSA *dsa, const OSSL_PARAM params[])
75 const OSSL_PARAM *param_priv_key, *param_pub_key;
76 BIGNUM *priv_key = NULL, *pub_key = NULL;
81 if (!params_to_domparams(dsa, params))
85 OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DSA_PRIV_KEY);
87 OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DSA_PUB_KEY);
90 * DSA documentation says that a public key must be present if a private key
93 if (param_priv_key != NULL && param_pub_key == NULL)
96 if ((param_priv_key != NULL
97 && !OSSL_PARAM_get_BN(param_priv_key, &priv_key))
98 || (param_pub_key != NULL
99 && !OSSL_PARAM_get_BN(param_pub_key, &pub_key)))
102 if (pub_key != NULL && !DSA_set0_key(dsa, pub_key, priv_key))
113 static int key_to_params(DSA *dsa, OSSL_PARAM params[])
116 const BIGNUM *priv_key = NULL, *pub_key = NULL;
120 if (!domparams_to_params(dsa, params))
123 DSA_get0_key(dsa, &pub_key, &priv_key);
124 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DSA_PRIV_KEY)) != NULL
125 && !OSSL_PARAM_set_BN(p, priv_key))
127 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DSA_PUB_KEY)) != NULL
128 && !OSSL_PARAM_set_BN(p, pub_key))
134 static void *dsa_importdomparams(void *provctx, const OSSL_PARAM params[])
138 if ((dsa = DSA_new()) == NULL
139 || !params_to_domparams(dsa, params)) {
146 static int dsa_exportdomparams(void *domparams, OSSL_PARAM params[])
148 DSA *dsa = domparams;
150 return dsa != NULL && !domparams_to_params(dsa, params);
153 static void *dsa_importkey(void *provctx, const OSSL_PARAM params[])
157 if ((dsa = DSA_new()) == NULL
158 || !params_to_key(dsa, params)) {
165 static int dsa_exportkey(void *key, OSSL_PARAM params[])
169 return dsa != NULL && !key_to_params(dsa, params);
172 const OSSL_DISPATCH dsa_keymgmt_functions[] = {
174 * TODO(3.0) When implementing OSSL_FUNC_KEYMGMT_GENKEY, remember to also
175 * implement OSSL_FUNC_KEYMGMT_EXPORTKEY.
177 { OSSL_FUNC_KEYMGMT_IMPORTDOMPARAMS, (void (*)(void))dsa_importdomparams },
178 { OSSL_FUNC_KEYMGMT_EXPORTDOMPARAMS, (void (*)(void))dsa_exportdomparams },
179 { OSSL_FUNC_KEYMGMT_FREEDOMPARAMS, (void (*)(void))DSA_free },
180 { OSSL_FUNC_KEYMGMT_IMPORTKEY, (void (*)(void))dsa_importkey },
181 { OSSL_FUNC_KEYMGMT_EXPORTKEY, (void (*)(void))dsa_exportkey },
182 { OSSL_FUNC_KEYMGMT_FREEKEY, (void (*)(void))DSA_free },