1 /*
2 * Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.
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
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
16 #include <openssl/core_dispatch.h>
17 #include <openssl/core_names.h>
18 #include <openssl/bn.h>
19 #include <openssl/err.h>
20 #include "prov/providercommon.h"
21 #include "prov/implementations.h"
22 #include "prov/provider_ctx.h"
23 #include "crypto/dsa.h"
24 #include "internal/sizes.h"
25 #include "internal/nelem.h"
26 #include "internal/param_build_set.h"
27
28 static OSSL_FUNC_keymgmt_new_fn dsa_newdata;
29 static OSSL_FUNC_keymgmt_free_fn dsa_freedata;
30 static OSSL_FUNC_keymgmt_gen_init_fn dsa_gen_init;
31 static OSSL_FUNC_keymgmt_gen_set_template_fn dsa_gen_set_template;
32 static OSSL_FUNC_keymgmt_gen_set_params_fn dsa_gen_set_params;
33 static OSSL_FUNC_keymgmt_gen_settable_params_fn dsa_gen_settable_params;
34 static OSSL_FUNC_keymgmt_gen_fn dsa_gen;
35 static OSSL_FUNC_keymgmt_gen_cleanup_fn dsa_gen_cleanup;
36 static OSSL_FUNC_keymgmt_load_fn dsa_load;
37 static OSSL_FUNC_keymgmt_get_params_fn dsa_get_params;
38 static OSSL_FUNC_keymgmt_gettable_params_fn dsa_gettable_params;
39 static OSSL_FUNC_keymgmt_has_fn dsa_has;
40 static OSSL_FUNC_keymgmt_match_fn dsa_match;
41 static OSSL_FUNC_keymgmt_validate_fn dsa_validate;
42 static OSSL_FUNC_keymgmt_import_fn dsa_import;
43 static OSSL_FUNC_keymgmt_import_types_fn dsa_import_types;
44 static OSSL_FUNC_keymgmt_export_fn dsa_export;
45 static OSSL_FUNC_keymgmt_export_types_fn dsa_export_types;
46 static OSSL_FUNC_keymgmt_dup_fn dsa_dup;
47
48 #define DSA_DEFAULT_MD "SHA256"
49 #define DSA_POSSIBLE_SELECTIONS \
50 (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS)
51
52 struct dsa_gen_ctx {
53 OSSL_LIB_CTX *libctx;
54
55 FFC_PARAMS *ffc_params;
56 int selection;
57 /* All these parameters are used for parameter generation only */
58 size_t pbits;
59 size_t qbits;
60 unsigned char *seed; /* optional FIPS186-4 param for testing */
61 size_t seedlen;
62 int gindex; /* optional FIPS186-4 generator index (ignored if -1) */
63 int gen_type; /* DSA_PARAMGEN_TYPE_FIPS_186_2 or DSA_PARAMGEN_TYPE_FIPS_186_4 */
64 int pcounter;
65 int hindex;
66 char *mdname;
67 char *mdprops;
68 OSSL_CALLBACK *cb;
69 void *cbarg;
70 };
71 typedef struct dh_name2id_st{
72 const char *name;
73 int id;
74 } DSA_GENTYPE_NAME2ID;
75
76 static const DSA_GENTYPE_NAME2ID dsatype2id[]=
77 {
78 #ifdef FIPS_MODULE
79 { "default", DSA_PARAMGEN_TYPE_FIPS_186_4 },
80 #else
81 { "default", DSA_PARAMGEN_TYPE_FIPS_DEFAULT },
82 #endif
83 { "fips186_4", DSA_PARAMGEN_TYPE_FIPS_186_4 },
84 { "fips186_2", DSA_PARAMGEN_TYPE_FIPS_186_2 },
85 };
86
dsa_gen_type_name2id(const char * name)87 static int dsa_gen_type_name2id(const char *name)
88 {
89 size_t i;
90
91 for (i = 0; i < OSSL_NELEM(dsatype2id); ++i) {
92 if (OPENSSL_strcasecmp(dsatype2id[i].name, name) == 0)
93 return dsatype2id[i].id;
94 }
95 return -1;
96 }
97
dsa_key_todata(DSA * dsa,OSSL_PARAM_BLD * bld,OSSL_PARAM params[],int include_private)98 static int dsa_key_todata(DSA *dsa, OSSL_PARAM_BLD *bld, OSSL_PARAM params[],
99 int include_private)
100 {
101 const BIGNUM *priv = NULL, *pub = NULL;
102
103 if (dsa == NULL)
104 return 0;
105
106 DSA_get0_key(dsa, &pub, &priv);
107 if (include_private
108 && priv != NULL
109 && !ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_PRIV_KEY, priv))
110 return 0;
111 if (pub != NULL
112 && !ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_PUB_KEY, pub))
113 return 0;
114
115 return 1;
116 }
117
dsa_newdata(void * provctx)118 static void *dsa_newdata(void *provctx)
119 {
120 if (!ossl_prov_is_running())
121 return NULL;
122 return ossl_dsa_new(PROV_LIBCTX_OF(provctx));
123 }
124
dsa_freedata(void * keydata)125 static void dsa_freedata(void *keydata)
126 {
127 DSA_free(keydata);
128 }
129
dsa_has(const void * keydata,int selection)130 static int dsa_has(const void *keydata, int selection)
131 {
132 const DSA *dsa = keydata;
133 int ok = 1;
134
135 if (!ossl_prov_is_running() || dsa == NULL)
136 return 0;
137 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
138 return 1; /* the selection is not missing */
139
140 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
141 ok = ok && (DSA_get0_pub_key(dsa) != NULL);
142 if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
143 ok = ok && (DSA_get0_priv_key(dsa) != NULL);
144 if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
145 ok = ok && (DSA_get0_p(dsa) != NULL && DSA_get0_g(dsa) != NULL);
146 return ok;
147 }
148
dsa_match(const void * keydata1,const void * keydata2,int selection)149 static int dsa_match(const void *keydata1, const void *keydata2, int selection)
150 {
151 const DSA *dsa1 = keydata1;
152 const DSA *dsa2 = keydata2;
153 int ok = 1;
154
155 if (!ossl_prov_is_running())
156 return 0;
157
158 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
159 int key_checked = 0;
160
161 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) {
162 const BIGNUM *pa = DSA_get0_pub_key(dsa1);
163 const BIGNUM *pb = DSA_get0_pub_key(dsa2);
164
165 if (pa != NULL && pb != NULL) {
166 ok = ok && BN_cmp(pa, pb) == 0;
167 key_checked = 1;
168 }
169 }
170 if (!key_checked
171 && (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
172 const BIGNUM *pa = DSA_get0_priv_key(dsa1);
173 const BIGNUM *pb = DSA_get0_priv_key(dsa2);
174
175 if (pa != NULL && pb != NULL) {
176 ok = ok && BN_cmp(pa, pb) == 0;
177 key_checked = 1;
178 }
179 }
180 ok = ok && key_checked;
181 }
182 if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) {
183 FFC_PARAMS *dsaparams1 = ossl_dsa_get0_params((DSA *)dsa1);
184 FFC_PARAMS *dsaparams2 = ossl_dsa_get0_params((DSA *)dsa2);
185
186 ok = ok && ossl_ffc_params_cmp(dsaparams1, dsaparams2, 1);
187 }
188 return ok;
189 }
190
dsa_import(void * keydata,int selection,const OSSL_PARAM params[])191 static int dsa_import(void *keydata, int selection, const OSSL_PARAM params[])
192 {
193 DSA *dsa = keydata;
194 int ok = 1;
195
196 if (!ossl_prov_is_running() || dsa == NULL)
197 return 0;
198
199 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
200 return 0;
201
202 if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
203 ok = ok && ossl_dsa_ffc_params_fromdata(dsa, params);
204 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
205 int include_private =
206 selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
207
208 ok = ok && ossl_dsa_key_fromdata(dsa, params, include_private);
209 }
210
211 return ok;
212 }
213
dsa_export(void * keydata,int selection,OSSL_CALLBACK * param_cb,void * cbarg)214 static int dsa_export(void *keydata, int selection, OSSL_CALLBACK *param_cb,
215 void *cbarg)
216 {
217 DSA *dsa = keydata;
218 OSSL_PARAM_BLD *tmpl;
219 OSSL_PARAM *params = NULL;
220 int ok = 1;
221
222 if (!ossl_prov_is_running() || dsa == NULL)
223 return 0;
224
225 tmpl = OSSL_PARAM_BLD_new();
226 if (tmpl == NULL)
227 return 0;
228
229 if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
230 ok = ok && ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), tmpl, NULL);
231 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
232 int include_private =
233 selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
234
235 ok = ok && dsa_key_todata(dsa, tmpl, NULL, include_private);
236 }
237
238 if (!ok || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) {
239 ok = 0;
240 goto err;
241 }
242
243 ok = param_cb(params, cbarg);
244 OSSL_PARAM_free(params);
245 err:
246 OSSL_PARAM_BLD_free(tmpl);
247 return ok;
248 }
249
250 /* IMEXPORT = IMPORT + EXPORT */
251
252 # define DSA_IMEXPORTABLE_PARAMETERS \
253 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_P, NULL, 0), \
254 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_Q, NULL, 0), \
255 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_G, NULL, 0), \
256 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_COFACTOR, NULL, 0), \
257 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL), \
258 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL), \
259 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL), \
260 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0)
261 # define DSA_IMEXPORTABLE_PUBLIC_KEY \
262 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0)
263 # define DSA_IMEXPORTABLE_PRIVATE_KEY \
264 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0)
265 static const OSSL_PARAM dsa_all_types[] = {
266 DSA_IMEXPORTABLE_PARAMETERS,
267 DSA_IMEXPORTABLE_PUBLIC_KEY,
268 DSA_IMEXPORTABLE_PRIVATE_KEY,
269 OSSL_PARAM_END
270 };
271 static const OSSL_PARAM dsa_parameter_types[] = {
272 DSA_IMEXPORTABLE_PARAMETERS,
273 OSSL_PARAM_END
274 };
275 static const OSSL_PARAM dsa_key_types[] = {
276 DSA_IMEXPORTABLE_PUBLIC_KEY,
277 DSA_IMEXPORTABLE_PRIVATE_KEY,
278 OSSL_PARAM_END
279 };
280 static const OSSL_PARAM *dsa_types[] = {
281 NULL, /* Index 0 = none of them */
282 dsa_parameter_types, /* Index 1 = parameter types */
283 dsa_key_types, /* Index 2 = key types */
284 dsa_all_types /* Index 3 = 1 + 2 */
285 };
286
dsa_imexport_types(int selection)287 static const OSSL_PARAM *dsa_imexport_types(int selection)
288 {
289 int type_select = 0;
290
291 if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
292 type_select += 1;
293 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
294 type_select += 2;
295 return dsa_types[type_select];
296 }
297
dsa_import_types(int selection)298 static const OSSL_PARAM *dsa_import_types(int selection)
299 {
300 return dsa_imexport_types(selection);
301 }
302
dsa_export_types(int selection)303 static const OSSL_PARAM *dsa_export_types(int selection)
304 {
305 return dsa_imexport_types(selection);
306 }
307
dsa_get_params(void * key,OSSL_PARAM params[])308 static ossl_inline int dsa_get_params(void *key, OSSL_PARAM params[])
309 {
310 DSA *dsa = key;
311 OSSL_PARAM *p;
312
313 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
314 && !OSSL_PARAM_set_int(p, DSA_bits(dsa)))
315 return 0;
316 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
317 && !OSSL_PARAM_set_int(p, DSA_security_bits(dsa)))
318 return 0;
319 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
320 && !OSSL_PARAM_set_int(p, DSA_size(dsa)))
321 return 0;
322 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL
323 && !OSSL_PARAM_set_utf8_string(p, DSA_DEFAULT_MD))
324 return 0;
325 return ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), NULL, params)
326 && dsa_key_todata(dsa, NULL, params, 1);
327 }
328
329 static const OSSL_PARAM dsa_params[] = {
330 OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
331 OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
332 OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
333 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0),
334 DSA_IMEXPORTABLE_PARAMETERS,
335 DSA_IMEXPORTABLE_PUBLIC_KEY,
336 DSA_IMEXPORTABLE_PRIVATE_KEY,
337 OSSL_PARAM_END
338 };
339
dsa_gettable_params(void * provctx)340 static const OSSL_PARAM *dsa_gettable_params(void *provctx)
341 {
342 return dsa_params;
343 }
344
dsa_validate_domparams(const DSA * dsa,int checktype)345 static int dsa_validate_domparams(const DSA *dsa, int checktype)
346 {
347 int status = 0;
348
349 return ossl_dsa_check_params(dsa, checktype, &status);
350 }
351
dsa_validate_public(const DSA * dsa)352 static int dsa_validate_public(const DSA *dsa)
353 {
354 int status = 0;
355 const BIGNUM *pub_key = NULL;
356
357 DSA_get0_key(dsa, &pub_key, NULL);
358 if (pub_key == NULL)
359 return 0;
360 return ossl_dsa_check_pub_key(dsa, pub_key, &status);
361 }
362
dsa_validate_private(const DSA * dsa)363 static int dsa_validate_private(const DSA *dsa)
364 {
365 int status = 0;
366 const BIGNUM *priv_key = NULL;
367
368 DSA_get0_key(dsa, NULL, &priv_key);
369 if (priv_key == NULL)
370 return 0;
371 return ossl_dsa_check_priv_key(dsa, priv_key, &status);
372 }
373
dsa_validate(const void * keydata,int selection,int checktype)374 static int dsa_validate(const void *keydata, int selection, int checktype)
375 {
376 const DSA *dsa = keydata;
377 int ok = 1;
378
379 if (!ossl_prov_is_running())
380 return 0;
381
382 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
383 return 1; /* nothing to validate */
384
385 if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
386 ok = ok && dsa_validate_domparams(dsa, checktype);
387
388 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
389 ok = ok && dsa_validate_public(dsa);
390
391 if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
392 ok = ok && dsa_validate_private(dsa);
393
394 /* If the whole key is selected, we do a pairwise validation */
395 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR)
396 == OSSL_KEYMGMT_SELECT_KEYPAIR)
397 ok = ok && ossl_dsa_check_pairwise(dsa);
398 return ok;
399 }
400
dsa_gen_init(void * provctx,int selection,const OSSL_PARAM params[])401 static void *dsa_gen_init(void *provctx, int selection,
402 const OSSL_PARAM params[])
403 {
404 OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
405 struct dsa_gen_ctx *gctx = NULL;
406
407 if (!ossl_prov_is_running() || (selection & DSA_POSSIBLE_SELECTIONS) == 0)
408 return NULL;
409
410 if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) {
411 gctx->selection = selection;
412 gctx->libctx = libctx;
413 gctx->pbits = 2048;
414 gctx->qbits = 224;
415 #ifdef FIPS_MODULE
416 gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_186_4;
417 #else
418 gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_DEFAULT;
419 #endif
420 gctx->gindex = -1;
421 gctx->pcounter = -1;
422 gctx->hindex = 0;
423 }
424 if (!dsa_gen_set_params(gctx, params)) {
425 OPENSSL_free(gctx);
426 gctx = NULL;
427 }
428 return gctx;
429 }
430
dsa_gen_set_template(void * genctx,void * templ)431 static int dsa_gen_set_template(void *genctx, void *templ)
432 {
433 struct dsa_gen_ctx *gctx = genctx;
434 DSA *dsa = templ;
435
436 if (!ossl_prov_is_running() || gctx == NULL || dsa == NULL)
437 return 0;
438 gctx->ffc_params = ossl_dsa_get0_params(dsa);
439 return 1;
440 }
441
dsa_set_gen_seed(struct dsa_gen_ctx * gctx,unsigned char * seed,size_t seedlen)442 static int dsa_set_gen_seed(struct dsa_gen_ctx *gctx, unsigned char *seed,
443 size_t seedlen)
444 {
445 OPENSSL_clear_free(gctx->seed, gctx->seedlen);
446 gctx->seed = NULL;
447 gctx->seedlen = 0;
448 if (seed != NULL && seedlen > 0) {
449 gctx->seed = OPENSSL_memdup(seed, seedlen);
450 if (gctx->seed == NULL)
451 return 0;
452 gctx->seedlen = seedlen;
453 }
454 return 1;
455 }
456
dsa_gen_set_params(void * genctx,const OSSL_PARAM params[])457 static int dsa_gen_set_params(void *genctx, const OSSL_PARAM params[])
458 {
459 struct dsa_gen_ctx *gctx = genctx;
460 const OSSL_PARAM *p;
461
462 if (gctx == NULL)
463 return 0;
464 if (params == NULL)
465 return 1;
466
467
468 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_TYPE);
469 if (p != NULL) {
470 if (p->data_type != OSSL_PARAM_UTF8_STRING
471 || ((gctx->gen_type = dsa_gen_type_name2id(p->data)) == -1)) {
472 ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
473 return 0;
474 }
475 }
476 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_GINDEX);
477 if (p != NULL
478 && !OSSL_PARAM_get_int(p, &gctx->gindex))
479 return 0;
480 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PCOUNTER);
481 if (p != NULL
482 && !OSSL_PARAM_get_int(p, &gctx->pcounter))
483 return 0;
484 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_H);
485 if (p != NULL
486 && !OSSL_PARAM_get_int(p, &gctx->hindex))
487 return 0;
488 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_SEED);
489 if (p != NULL
490 && (p->data_type != OSSL_PARAM_OCTET_STRING
491 || !dsa_set_gen_seed(gctx, p->data, p->data_size)))
492 return 0;
493 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PBITS)) != NULL
494 && !OSSL_PARAM_get_size_t(p, &gctx->pbits))
495 return 0;
496 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_QBITS)) != NULL
497 && !OSSL_PARAM_get_size_t(p, &gctx->qbits))
498 return 0;
499 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST);
500 if (p != NULL) {
501 if (p->data_type != OSSL_PARAM_UTF8_STRING)
502 return 0;
503 OPENSSL_free(gctx->mdname);
504 gctx->mdname = OPENSSL_strdup(p->data);
505 if (gctx->mdname == NULL)
506 return 0;
507 }
508 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST_PROPS);
509 if (p != NULL) {
510 if (p->data_type != OSSL_PARAM_UTF8_STRING)
511 return 0;
512 OPENSSL_free(gctx->mdprops);
513 gctx->mdprops = OPENSSL_strdup(p->data);
514 if (gctx->mdprops == NULL)
515 return 0;
516 }
517 return 1;
518 }
519
dsa_gen_settable_params(ossl_unused void * genctx,ossl_unused void * provctx)520 static const OSSL_PARAM *dsa_gen_settable_params(ossl_unused void *genctx,
521 ossl_unused void *provctx)
522 {
523 static OSSL_PARAM settable[] = {
524 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE, NULL, 0),
525 OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_PBITS, NULL),
526 OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_QBITS, NULL),
527 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST, NULL, 0),
528 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST_PROPS, NULL, 0),
529 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL),
530 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0),
531 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL),
532 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL),
533 OSSL_PARAM_END
534 };
535 return settable;
536 }
537
dsa_gencb(int p,int n,BN_GENCB * cb)538 static int dsa_gencb(int p, int n, BN_GENCB *cb)
539 {
540 struct dsa_gen_ctx *gctx = BN_GENCB_get_arg(cb);
541 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END };
542
543 params[0] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_POTENTIAL, &p);
544 params[1] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_ITERATION, &n);
545
546 return gctx->cb(params, gctx->cbarg);
547 }
548
dsa_gen(void * genctx,OSSL_CALLBACK * osslcb,void * cbarg)549 static void *dsa_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
550 {
551 struct dsa_gen_ctx *gctx = genctx;
552 DSA *dsa = NULL;
553 BN_GENCB *gencb = NULL;
554 int ret = 0;
555 FFC_PARAMS *ffc;
556
557 if (!ossl_prov_is_running() || gctx == NULL)
558 return NULL;
559 dsa = ossl_dsa_new(gctx->libctx);
560 if (dsa == NULL)
561 return NULL;
562
563 if (gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_DEFAULT)
564 gctx->gen_type = (gctx->pbits >= 2048 ? DSA_PARAMGEN_TYPE_FIPS_186_4 :
565 DSA_PARAMGEN_TYPE_FIPS_186_2);
566
567 gctx->cb = osslcb;
568 gctx->cbarg = cbarg;
569 gencb = BN_GENCB_new();
570 if (gencb != NULL)
571 BN_GENCB_set(gencb, dsa_gencb, genctx);
572
573 ffc = ossl_dsa_get0_params(dsa);
574 /* Copy the template value if one was passed */
575 if (gctx->ffc_params != NULL
576 && !ossl_ffc_params_copy(ffc, gctx->ffc_params))
577 goto end;
578
579 if (gctx->seed != NULL
580 && !ossl_ffc_params_set_seed(ffc, gctx->seed, gctx->seedlen))
581 goto end;
582 if (gctx->gindex != -1) {
583 ossl_ffc_params_set_gindex(ffc, gctx->gindex);
584 if (gctx->pcounter != -1)
585 ossl_ffc_params_set_pcounter(ffc, gctx->pcounter);
586 } else if (gctx->hindex != 0) {
587 ossl_ffc_params_set_h(ffc, gctx->hindex);
588 }
589 if (gctx->mdname != NULL) {
590 if (!ossl_ffc_set_digest(ffc, gctx->mdname, gctx->mdprops))
591 goto end;
592 }
593 if ((gctx->selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) {
594
595 if (ossl_dsa_generate_ffc_parameters(dsa, gctx->gen_type,
596 gctx->pbits, gctx->qbits,
597 gencb) <= 0)
598 goto end;
599 }
600 ossl_ffc_params_enable_flags(ffc, FFC_PARAM_FLAG_VALIDATE_LEGACY,
601 gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_186_2);
602 if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
603 if (ffc->p == NULL
604 || ffc->q == NULL
605 || ffc->g == NULL)
606 goto end;
607 if (DSA_generate_key(dsa) <= 0)
608 goto end;
609 }
610 ret = 1;
611 end:
612 if (ret <= 0) {
613 DSA_free(dsa);
614 dsa = NULL;
615 }
616 BN_GENCB_free(gencb);
617 return dsa;
618 }
619
dsa_gen_cleanup(void * genctx)620 static void dsa_gen_cleanup(void *genctx)
621 {
622 struct dsa_gen_ctx *gctx = genctx;
623
624 if (gctx == NULL)
625 return;
626
627 OPENSSL_free(gctx->mdname);
628 OPENSSL_free(gctx->mdprops);
629 OPENSSL_clear_free(gctx->seed, gctx->seedlen);
630 OPENSSL_free(gctx);
631 }
632
dsa_load(const void * reference,size_t reference_sz)633 static void *dsa_load(const void *reference, size_t reference_sz)
634 {
635 DSA *dsa = NULL;
636
637 if (ossl_prov_is_running() && reference_sz == sizeof(dsa)) {
638 /* The contents of the reference is the address to our object */
639 dsa = *(DSA **)reference;
640 /* We grabbed, so we detach it */
641 *(DSA **)reference = NULL;
642 return dsa;
643 }
644 return NULL;
645 }
646
dsa_dup(const void * keydata_from,int selection)647 static void *dsa_dup(const void *keydata_from, int selection)
648 {
649 if (ossl_prov_is_running())
650 return ossl_dsa_dup(keydata_from, selection);
651 return NULL;
652 }
653
654 const OSSL_DISPATCH ossl_dsa_keymgmt_functions[] = {
655 { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dsa_newdata },
656 { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))dsa_gen_init },
657 { OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, (void (*)(void))dsa_gen_set_template },
658 { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))dsa_gen_set_params },
659 { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
660 (void (*)(void))dsa_gen_settable_params },
661 { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))dsa_gen },
662 { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))dsa_gen_cleanup },
663 { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))dsa_load },
664 { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dsa_freedata },
665 { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dsa_get_params },
666 { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dsa_gettable_params },
667 { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dsa_has },
668 { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))dsa_match },
669 { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))dsa_validate },
670 { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dsa_import },
671 { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dsa_import_types },
672 { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dsa_export },
673 { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dsa_export_types },
674 { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))dsa_dup },
675 { 0, NULL }
676 };
677