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
11 * DSA low level APIs are deprecated for public use, but still ok for
14 #include "internal/deprecated.h"
16 #include <openssl/core_numbers.h>
17 #include <openssl/core_names.h>
18 #include <openssl/bn.h>
19 #include <openssl/params.h>
20 #include "internal/param_build.h"
21 #include "crypto/dsa.h"
22 #include "prov/implementations.h"
23 #include "prov/providercommon.h"
24 #include "prov/provider_ctx.h"
25 #include "crypto/dsa.h"
27 static OSSL_OP_keymgmt_new_fn dsa_newdata
;
28 static OSSL_OP_keymgmt_free_fn dsa_freedata
;
29 static OSSL_OP_keymgmt_get_params_fn dsa_get_params
;
30 static OSSL_OP_keymgmt_gettable_params_fn dsa_gettable_params
;
31 static OSSL_OP_keymgmt_has_fn dsa_has
;
32 static OSSL_OP_keymgmt_import_fn dsa_import
;
33 static OSSL_OP_keymgmt_import_types_fn dsa_import_types
;
34 static OSSL_OP_keymgmt_export_fn dsa_export
;
35 static OSSL_OP_keymgmt_export_types_fn dsa_export_types
;
37 #define DSA_DEFAULT_MD "SHA256"
38 #define DSA_POSSIBLE_SELECTIONS \
39 (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS)
41 static int params_to_domparams(DSA
*dsa
, const OSSL_PARAM params
[])
43 const OSSL_PARAM
*param_p
, *param_q
, *param_g
;
44 BIGNUM
*p
= NULL
, *q
= NULL
, *g
= NULL
;
49 param_p
= OSSL_PARAM_locate_const(params
, OSSL_PKEY_PARAM_FFC_P
);
50 param_q
= OSSL_PARAM_locate_const(params
, OSSL_PKEY_PARAM_FFC_Q
);
51 param_g
= OSSL_PARAM_locate_const(params
, OSSL_PKEY_PARAM_FFC_G
);
53 if ((param_p
!= NULL
&& !OSSL_PARAM_get_BN(param_p
, &p
))
54 || (param_q
!= NULL
&& !OSSL_PARAM_get_BN(param_q
, &q
))
55 || (param_g
!= NULL
&& !OSSL_PARAM_get_BN(param_g
, &g
)))
58 if (!DSA_set0_pqg(dsa
, p
, q
, g
))
70 static int domparams_to_params(DSA
*dsa
, OSSL_PARAM_BLD
*tmpl
)
72 const BIGNUM
*dsa_p
= NULL
, *dsa_q
= NULL
, *dsa_g
= NULL
;
77 DSA_get0_pqg(dsa
, &dsa_p
, &dsa_q
, &dsa_g
);
79 && !ossl_param_bld_push_BN(tmpl
, OSSL_PKEY_PARAM_FFC_P
, dsa_p
))
82 && !ossl_param_bld_push_BN(tmpl
, OSSL_PKEY_PARAM_FFC_Q
, dsa_q
))
85 && !ossl_param_bld_push_BN(tmpl
, OSSL_PKEY_PARAM_FFC_G
, dsa_g
))
91 static int params_to_key(DSA
*dsa
, const OSSL_PARAM params
[])
93 const OSSL_PARAM
*param_priv_key
, *param_pub_key
;
94 BIGNUM
*priv_key
= NULL
, *pub_key
= NULL
;
99 if (!params_to_domparams(dsa
, params
))
103 OSSL_PARAM_locate_const(params
, OSSL_PKEY_PARAM_PRIV_KEY
);
105 OSSL_PARAM_locate_const(params
, OSSL_PKEY_PARAM_PUB_KEY
);
108 * DSA documentation says that a public key must be present if a private key
111 if (param_priv_key
!= NULL
&& param_pub_key
== NULL
)
114 if ((param_priv_key
!= NULL
115 && !OSSL_PARAM_get_BN(param_priv_key
, &priv_key
))
116 || (param_pub_key
!= NULL
117 && !OSSL_PARAM_get_BN(param_pub_key
, &pub_key
)))
120 if (pub_key
!= NULL
&& !DSA_set0_key(dsa
, pub_key
, priv_key
))
126 BN_clear_free(priv_key
);
131 static int key_to_params(DSA
*dsa
, OSSL_PARAM_BLD
*tmpl
)
133 const BIGNUM
*priv_key
= NULL
, *pub_key
= NULL
;
137 if (!domparams_to_params(dsa
, tmpl
))
140 DSA_get0_key(dsa
, &pub_key
, &priv_key
);
142 && !ossl_param_bld_push_BN(tmpl
, OSSL_PKEY_PARAM_PRIV_KEY
, priv_key
))
145 && !ossl_param_bld_push_BN(tmpl
, OSSL_PKEY_PARAM_PUB_KEY
, pub_key
))
151 static void *dsa_newdata(void *provctx
)
153 return dsa_new_with_ctx(PROV_LIBRARY_CONTEXT_OF(provctx
));
156 static void dsa_freedata(void *keydata
)
161 static int dsa_has(void *keydata
, int selection
)
166 if ((selection
& DSA_POSSIBLE_SELECTIONS
) != 0)
169 if ((selection
& OSSL_KEYMGMT_SELECT_PUBLIC_KEY
) != 0)
170 ok
= ok
&& (DSA_get0_pub_key(dsa
) != NULL
);
171 if ((selection
& OSSL_KEYMGMT_SELECT_PRIVATE_KEY
) != 0)
172 ok
= ok
&& (DSA_get0_priv_key(dsa
) != NULL
);
173 if ((selection
& OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS
) != 0)
174 ok
= ok
&& (DSA_get0_p(dsa
) != NULL
&& DSA_get0_g(dsa
) != NULL
);
178 static int dsa_import(void *keydata
, int selection
, const OSSL_PARAM params
[])
186 if ((selection
& DSA_POSSIBLE_SELECTIONS
) != 0)
189 if ((selection
& OSSL_KEYMGMT_SELECT_ALL_PARAMETERS
) != 0)
190 ok
= ok
&& params_to_domparams(dsa
, params
);
191 if ((selection
& OSSL_KEYMGMT_SELECT_KEYPAIR
) != 0)
192 ok
= ok
&& params_to_key(dsa
, params
);
197 static int dsa_export(void *keydata
, int selection
, OSSL_CALLBACK
*param_cb
,
202 OSSL_PARAM
*params
= NULL
;
208 ossl_param_bld_init(&tmpl
);
210 if ((selection
& OSSL_KEYMGMT_SELECT_ALL_PARAMETERS
) != 0)
211 ok
= ok
&& domparams_to_params(dsa
, &tmpl
);
212 if ((selection
& OSSL_KEYMGMT_SELECT_KEYPAIR
) != 0)
213 ok
= ok
&& key_to_params(dsa
, &tmpl
);
216 || (params
= ossl_param_bld_to_param(&tmpl
)) == NULL
)
219 ok
= param_cb(params
, cbarg
);
220 ossl_param_bld_free(params
);
224 /* IMEXPORT = IMPORT + EXPORT */
226 # define DSA_IMEXPORTABLE_PARAMETERS \
227 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_P, NULL, 0), \
228 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_Q, NULL, 0), \
229 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_G, NULL, 0)
230 # define DSA_IMEXPORTABLE_PUBLIC_KEY \
231 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0)
232 # define DSA_IMEXPORTABLE_PRIVATE_KEY \
233 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0)
234 static const OSSL_PARAM dsa_all_types
[] = {
235 DSA_IMEXPORTABLE_PARAMETERS
,
236 DSA_IMEXPORTABLE_PUBLIC_KEY
,
237 DSA_IMEXPORTABLE_PRIVATE_KEY
,
240 static const OSSL_PARAM dsa_parameter_types
[] = {
241 DSA_IMEXPORTABLE_PARAMETERS
,
244 static const OSSL_PARAM dsa_key_types
[] = {
245 DSA_IMEXPORTABLE_PUBLIC_KEY
,
246 DSA_IMEXPORTABLE_PRIVATE_KEY
,
249 static const OSSL_PARAM
*dsa_types
[] = {
250 NULL
, /* Index 0 = none of them */
251 dsa_parameter_types
, /* Index 1 = parameter types */
252 dsa_key_types
, /* Index 2 = key types */
253 dsa_all_types
/* Index 3 = 1 + 2 */
256 static const OSSL_PARAM
*dsa_imexport_types(int selection
)
260 if ((selection
& OSSL_KEYMGMT_SELECT_ALL_PARAMETERS
) != 0)
262 if ((selection
& OSSL_KEYMGMT_SELECT_KEYPAIR
) != 0)
264 return dsa_types
[type_select
];
267 static const OSSL_PARAM
*dsa_import_types(int selection
)
269 return dsa_imexport_types(selection
);
272 static const OSSL_PARAM
*dsa_export_types(int selection
)
274 return dsa_imexport_types(selection
);
277 static ossl_inline
int dsa_get_params(void *key
, OSSL_PARAM params
[])
282 if ((p
= OSSL_PARAM_locate(params
, OSSL_PKEY_PARAM_BITS
)) != NULL
283 && !OSSL_PARAM_set_int(p
, DSA_bits(dsa
)))
285 if ((p
= OSSL_PARAM_locate(params
, OSSL_PKEY_PARAM_SECURITY_BITS
)) != NULL
286 && !OSSL_PARAM_set_int(p
, DSA_security_bits(dsa
)))
288 if ((p
= OSSL_PARAM_locate(params
, OSSL_PKEY_PARAM_MAX_SIZE
)) != NULL
289 && !OSSL_PARAM_set_int(p
, DSA_size(dsa
)))
291 if ((p
= OSSL_PARAM_locate(params
, OSSL_PKEY_PARAM_DEFAULT_DIGEST
)) != NULL
292 && !OSSL_PARAM_set_utf8_string(p
, DSA_DEFAULT_MD
))
297 static const OSSL_PARAM dsa_params
[] = {
298 OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS
, NULL
),
299 OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS
, NULL
),
300 OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE
, NULL
),
301 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST
, NULL
, 0),
305 static const OSSL_PARAM
*dsa_gettable_params(void)
310 const OSSL_DISPATCH dsa_keymgmt_functions
[] = {
311 { OSSL_FUNC_KEYMGMT_NEW
, (void (*)(void))dsa_newdata
},
312 { OSSL_FUNC_KEYMGMT_FREE
, (void (*)(void))dsa_freedata
},
313 { OSSL_FUNC_KEYMGMT_GET_PARAMS
, (void (*) (void))dsa_get_params
},
314 { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS
, (void (*) (void))dsa_gettable_params
},
315 { OSSL_FUNC_KEYMGMT_HAS
, (void (*)(void))dsa_has
},
316 { OSSL_FUNC_KEYMGMT_IMPORT
, (void (*)(void))dsa_import
},
317 { OSSL_FUNC_KEYMGMT_IMPORT_TYPES
, (void (*)(void))dsa_import_types
},
318 { OSSL_FUNC_KEYMGMT_EXPORT
, (void (*)(void))dsa_export
},
319 { OSSL_FUNC_KEYMGMT_EXPORT_TYPES
, (void (*)(void))dsa_export_types
},