1 /*
2 * Copyright 2019-2023 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 /* a key without parameters is meaningless */
203 ok = ok && ossl_dsa_ffc_params_fromdata(dsa, params);
204
205 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
206 int include_private =
207 selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
208
209 ok = ok && ossl_dsa_key_fromdata(dsa, params, include_private);
210 }
211
212 return ok;
213 }
214
dsa_export(void * keydata,int selection,OSSL_CALLBACK * param_cb,void * cbarg)215 static int dsa_export(void *keydata, int selection, OSSL_CALLBACK *param_cb,
216 void *cbarg)
217 {
218 DSA *dsa = keydata;
219 OSSL_PARAM_BLD *tmpl;
220 OSSL_PARAM *params = NULL;
221 int ok = 1;
222
223 if (!ossl_prov_is_running() || dsa == NULL)
224 return 0;
225
226 tmpl = OSSL_PARAM_BLD_new();
227 if (tmpl == NULL)
228 return 0;
229
230 if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
231 ok = ok && ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), tmpl, NULL);
232 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
233 int include_private =
234 selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
235
236 ok = ok && dsa_key_todata(dsa, tmpl, NULL, include_private);
237 }
238
239 if (!ok || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) {
240 ok = 0;
241 goto err;
242 }
243
244 ok = param_cb(params, cbarg);
245 OSSL_PARAM_free(params);
246 err:
247 OSSL_PARAM_BLD_free(tmpl);
248 return ok;
249 }
250
251 /* IMEXPORT = IMPORT + EXPORT */
252
253 # define DSA_IMEXPORTABLE_PARAMETERS \
254 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_P, NULL, 0), \
255 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_Q, NULL, 0), \
256 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_G, NULL, 0), \
257 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_COFACTOR, NULL, 0), \
258 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL), \
259 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL), \
260 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL), \
261 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0)
262 # define DSA_IMEXPORTABLE_PUBLIC_KEY \
263 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0)
264 # define DSA_IMEXPORTABLE_PRIVATE_KEY \
265 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0)
266 static const OSSL_PARAM dsa_all_types[] = {
267 DSA_IMEXPORTABLE_PARAMETERS,
268 DSA_IMEXPORTABLE_PUBLIC_KEY,
269 DSA_IMEXPORTABLE_PRIVATE_KEY,
270 OSSL_PARAM_END
271 };
272 static const OSSL_PARAM dsa_parameter_types[] = {
273 DSA_IMEXPORTABLE_PARAMETERS,
274 OSSL_PARAM_END
275 };
276 static const OSSL_PARAM dsa_key_types[] = {
277 DSA_IMEXPORTABLE_PUBLIC_KEY,
278 DSA_IMEXPORTABLE_PRIVATE_KEY,
279 OSSL_PARAM_END
280 };
281 static const OSSL_PARAM *dsa_types[] = {
282 NULL, /* Index 0 = none of them */
283 dsa_parameter_types, /* Index 1 = parameter types */
284 dsa_key_types, /* Index 2 = key types */
285 dsa_all_types /* Index 3 = 1 + 2 */
286 };
287
dsa_imexport_types(int selection)288 static const OSSL_PARAM *dsa_imexport_types(int selection)
289 {
290 int type_select = 0;
291
292 if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
293 type_select += 1;
294 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
295 type_select += 2;
296 return dsa_types[type_select];
297 }
298
dsa_import_types(int selection)299 static const OSSL_PARAM *dsa_import_types(int selection)
300 {
301 return dsa_imexport_types(selection);
302 }
303
dsa_export_types(int selection)304 static const OSSL_PARAM *dsa_export_types(int selection)
305 {
306 return dsa_imexport_types(selection);
307 }
308
dsa_get_params(void * key,OSSL_PARAM params[])309 static ossl_inline int dsa_get_params(void *key, OSSL_PARAM params[])
310 {
311 DSA *dsa = key;
312 OSSL_PARAM *p;
313
314 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
315 && !OSSL_PARAM_set_int(p, DSA_bits(dsa)))
316 return 0;
317 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
318 && !OSSL_PARAM_set_int(p, DSA_security_bits(dsa)))
319 return 0;
320 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
321 && !OSSL_PARAM_set_int(p, DSA_size(dsa)))
322 return 0;
323 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL
324 && !OSSL_PARAM_set_utf8_string(p, DSA_DEFAULT_MD))
325 return 0;
326 return ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), NULL, params)
327 && dsa_key_todata(dsa, NULL, params, 1);
328 }
329
330 static const OSSL_PARAM dsa_params[] = {
331 OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
332 OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
333 OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
334 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0),
335 DSA_IMEXPORTABLE_PARAMETERS,
336 DSA_IMEXPORTABLE_PUBLIC_KEY,
337 DSA_IMEXPORTABLE_PRIVATE_KEY,
338 OSSL_PARAM_END
339 };
340
dsa_gettable_params(void * provctx)341 static const OSSL_PARAM *dsa_gettable_params(void *provctx)
342 {
343 return dsa_params;
344 }
345
dsa_validate_domparams(const DSA * dsa,int checktype)346 static int dsa_validate_domparams(const DSA *dsa, int checktype)
347 {
348 int status = 0;
349
350 return ossl_dsa_check_params(dsa, checktype, &status);
351 }
352
dsa_validate_public(const DSA * dsa)353 static int dsa_validate_public(const DSA *dsa)
354 {
355 int status = 0;
356 const BIGNUM *pub_key = NULL;
357
358 DSA_get0_key(dsa, &pub_key, NULL);
359 if (pub_key == NULL)
360 return 0;
361 return ossl_dsa_check_pub_key(dsa, pub_key, &status);
362 }
363
dsa_validate_private(const DSA * dsa)364 static int dsa_validate_private(const DSA *dsa)
365 {
366 int status = 0;
367 const BIGNUM *priv_key = NULL;
368
369 DSA_get0_key(dsa, NULL, &priv_key);
370 if (priv_key == NULL)
371 return 0;
372 return ossl_dsa_check_priv_key(dsa, priv_key, &status);
373 }
374
dsa_validate(const void * keydata,int selection,int checktype)375 static int dsa_validate(const void *keydata, int selection, int checktype)
376 {
377 const DSA *dsa = keydata;
378 int ok = 1;
379
380 if (!ossl_prov_is_running())
381 return 0;
382
383 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
384 return 1; /* nothing to validate */
385
386 if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
387 ok = ok && dsa_validate_domparams(dsa, checktype);
388
389 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
390 ok = ok && dsa_validate_public(dsa);
391
392 if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
393 ok = ok && dsa_validate_private(dsa);
394
395 /* If the whole key is selected, we do a pairwise validation */
396 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR)
397 == OSSL_KEYMGMT_SELECT_KEYPAIR)
398 ok = ok && ossl_dsa_check_pairwise(dsa);
399 return ok;
400 }
401
dsa_gen_init(void * provctx,int selection,const OSSL_PARAM params[])402 static void *dsa_gen_init(void *provctx, int selection,
403 const OSSL_PARAM params[])
404 {
405 OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
406 struct dsa_gen_ctx *gctx = NULL;
407
408 if (!ossl_prov_is_running() || (selection & DSA_POSSIBLE_SELECTIONS) == 0)
409 return NULL;
410
411 if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) {
412 gctx->selection = selection;
413 gctx->libctx = libctx;
414 gctx->pbits = 2048;
415 gctx->qbits = 224;
416 #ifdef FIPS_MODULE
417 gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_186_4;
418 #else
419 gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_DEFAULT;
420 #endif
421 gctx->gindex = -1;
422 gctx->pcounter = -1;
423 gctx->hindex = 0;
424 }
425 if (!dsa_gen_set_params(gctx, params)) {
426 OPENSSL_free(gctx);
427 gctx = NULL;
428 }
429 return gctx;
430 }
431
dsa_gen_set_template(void * genctx,void * templ)432 static int dsa_gen_set_template(void *genctx, void *templ)
433 {
434 struct dsa_gen_ctx *gctx = genctx;
435 DSA *dsa = templ;
436
437 if (!ossl_prov_is_running() || gctx == NULL || dsa == NULL)
438 return 0;
439 gctx->ffc_params = ossl_dsa_get0_params(dsa);
440 return 1;
441 }
442
dsa_set_gen_seed(struct dsa_gen_ctx * gctx,unsigned char * seed,size_t seedlen)443 static int dsa_set_gen_seed(struct dsa_gen_ctx *gctx, unsigned char *seed,
444 size_t seedlen)
445 {
446 OPENSSL_clear_free(gctx->seed, gctx->seedlen);
447 gctx->seed = NULL;
448 gctx->seedlen = 0;
449 if (seed != NULL && seedlen > 0) {
450 gctx->seed = OPENSSL_memdup(seed, seedlen);
451 if (gctx->seed == NULL)
452 return 0;
453 gctx->seedlen = seedlen;
454 }
455 return 1;
456 }
457
dsa_gen_set_params(void * genctx,const OSSL_PARAM params[])458 static int dsa_gen_set_params(void *genctx, const OSSL_PARAM params[])
459 {
460 struct dsa_gen_ctx *gctx = genctx;
461 const OSSL_PARAM *p;
462
463 if (gctx == NULL)
464 return 0;
465 if (params == NULL)
466 return 1;
467
468
469 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_TYPE);
470 if (p != NULL) {
471 if (p->data_type != OSSL_PARAM_UTF8_STRING
472 || ((gctx->gen_type = dsa_gen_type_name2id(p->data)) == -1)) {
473 ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
474 return 0;
475 }
476 }
477 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_GINDEX);
478 if (p != NULL
479 && !OSSL_PARAM_get_int(p, &gctx->gindex))
480 return 0;
481 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PCOUNTER);
482 if (p != NULL
483 && !OSSL_PARAM_get_int(p, &gctx->pcounter))
484 return 0;
485 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_H);
486 if (p != NULL
487 && !OSSL_PARAM_get_int(p, &gctx->hindex))
488 return 0;
489 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_SEED);
490 if (p != NULL
491 && (p->data_type != OSSL_PARAM_OCTET_STRING
492 || !dsa_set_gen_seed(gctx, p->data, p->data_size)))
493 return 0;
494 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PBITS)) != NULL
495 && !OSSL_PARAM_get_size_t(p, &gctx->pbits))
496 return 0;
497 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_QBITS)) != NULL
498 && !OSSL_PARAM_get_size_t(p, &gctx->qbits))
499 return 0;
500 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST);
501 if (p != NULL) {
502 if (p->data_type != OSSL_PARAM_UTF8_STRING)
503 return 0;
504 OPENSSL_free(gctx->mdname);
505 gctx->mdname = OPENSSL_strdup(p->data);
506 if (gctx->mdname == NULL)
507 return 0;
508 }
509 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST_PROPS);
510 if (p != NULL) {
511 if (p->data_type != OSSL_PARAM_UTF8_STRING)
512 return 0;
513 OPENSSL_free(gctx->mdprops);
514 gctx->mdprops = OPENSSL_strdup(p->data);
515 if (gctx->mdprops == NULL)
516 return 0;
517 }
518 return 1;
519 }
520
dsa_gen_settable_params(ossl_unused void * genctx,ossl_unused void * provctx)521 static const OSSL_PARAM *dsa_gen_settable_params(ossl_unused void *genctx,
522 ossl_unused void *provctx)
523 {
524 static OSSL_PARAM settable[] = {
525 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE, NULL, 0),
526 OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_PBITS, NULL),
527 OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_QBITS, NULL),
528 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST, NULL, 0),
529 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST_PROPS, NULL, 0),
530 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL),
531 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0),
532 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL),
533 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL),
534 OSSL_PARAM_END
535 };
536 return settable;
537 }
538
dsa_gencb(int p,int n,BN_GENCB * cb)539 static int dsa_gencb(int p, int n, BN_GENCB *cb)
540 {
541 struct dsa_gen_ctx *gctx = BN_GENCB_get_arg(cb);
542 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END };
543
544 params[0] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_POTENTIAL, &p);
545 params[1] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_ITERATION, &n);
546
547 return gctx->cb(params, gctx->cbarg);
548 }
549
dsa_gen(void * genctx,OSSL_CALLBACK * osslcb,void * cbarg)550 static void *dsa_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
551 {
552 struct dsa_gen_ctx *gctx = genctx;
553 DSA *dsa = NULL;
554 BN_GENCB *gencb = NULL;
555 int ret = 0;
556 FFC_PARAMS *ffc;
557
558 if (!ossl_prov_is_running() || gctx == NULL)
559 return NULL;
560 dsa = ossl_dsa_new(gctx->libctx);
561 if (dsa == NULL)
562 return NULL;
563
564 if (gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_DEFAULT)
565 gctx->gen_type = (gctx->pbits >= 2048 ? DSA_PARAMGEN_TYPE_FIPS_186_4 :
566 DSA_PARAMGEN_TYPE_FIPS_186_2);
567
568 gctx->cb = osslcb;
569 gctx->cbarg = cbarg;
570 gencb = BN_GENCB_new();
571 if (gencb != NULL)
572 BN_GENCB_set(gencb, dsa_gencb, genctx);
573
574 ffc = ossl_dsa_get0_params(dsa);
575 /* Copy the template value if one was passed */
576 if (gctx->ffc_params != NULL
577 && !ossl_ffc_params_copy(ffc, gctx->ffc_params))
578 goto end;
579
580 if (gctx->seed != NULL
581 && !ossl_ffc_params_set_seed(ffc, gctx->seed, gctx->seedlen))
582 goto end;
583 if (gctx->gindex != -1) {
584 ossl_ffc_params_set_gindex(ffc, gctx->gindex);
585 if (gctx->pcounter != -1)
586 ossl_ffc_params_set_pcounter(ffc, gctx->pcounter);
587 } else if (gctx->hindex != 0) {
588 ossl_ffc_params_set_h(ffc, gctx->hindex);
589 }
590 if (gctx->mdname != NULL) {
591 if (!ossl_ffc_set_digest(ffc, gctx->mdname, gctx->mdprops))
592 goto end;
593 }
594 if ((gctx->selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) {
595
596 if (ossl_dsa_generate_ffc_parameters(dsa, gctx->gen_type,
597 gctx->pbits, gctx->qbits,
598 gencb) <= 0)
599 goto end;
600 }
601 ossl_ffc_params_enable_flags(ffc, FFC_PARAM_FLAG_VALIDATE_LEGACY,
602 gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_186_2);
603 if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
604 if (ffc->p == NULL
605 || ffc->q == NULL
606 || ffc->g == NULL)
607 goto end;
608 if (DSA_generate_key(dsa) <= 0)
609 goto end;
610 }
611 ret = 1;
612 end:
613 if (ret <= 0) {
614 DSA_free(dsa);
615 dsa = NULL;
616 }
617 BN_GENCB_free(gencb);
618 return dsa;
619 }
620
dsa_gen_cleanup(void * genctx)621 static void dsa_gen_cleanup(void *genctx)
622 {
623 struct dsa_gen_ctx *gctx = genctx;
624
625 if (gctx == NULL)
626 return;
627
628 OPENSSL_free(gctx->mdname);
629 OPENSSL_free(gctx->mdprops);
630 OPENSSL_clear_free(gctx->seed, gctx->seedlen);
631 OPENSSL_free(gctx);
632 }
633
dsa_load(const void * reference,size_t reference_sz)634 static void *dsa_load(const void *reference, size_t reference_sz)
635 {
636 DSA *dsa = NULL;
637
638 if (ossl_prov_is_running() && reference_sz == sizeof(dsa)) {
639 /* The contents of the reference is the address to our object */
640 dsa = *(DSA **)reference;
641 /* We grabbed, so we detach it */
642 *(DSA **)reference = NULL;
643 return dsa;
644 }
645 return NULL;
646 }
647
dsa_dup(const void * keydata_from,int selection)648 static void *dsa_dup(const void *keydata_from, int selection)
649 {
650 if (ossl_prov_is_running())
651 return ossl_dsa_dup(keydata_from, selection);
652 return NULL;
653 }
654
655 const OSSL_DISPATCH ossl_dsa_keymgmt_functions[] = {
656 { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dsa_newdata },
657 { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))dsa_gen_init },
658 { OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, (void (*)(void))dsa_gen_set_template },
659 { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))dsa_gen_set_params },
660 { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
661 (void (*)(void))dsa_gen_settable_params },
662 { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))dsa_gen },
663 { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))dsa_gen_cleanup },
664 { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))dsa_load },
665 { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dsa_freedata },
666 { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dsa_get_params },
667 { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dsa_gettable_params },
668 { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dsa_has },
669 { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))dsa_match },
670 { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))dsa_validate },
671 { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dsa_import },
672 { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dsa_import_types },
673 { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dsa_export },
674 { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dsa_export_types },
675 { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))dsa_dup },
676 { 0, NULL }
677 };
678