1 /*
2 * Copyright 2019-2024 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/securitycheck.h"
21 #include "prov/providercommon.h"
22 #include "prov/implementations.h"
23 #include "prov/provider_ctx.h"
24 #include "crypto/dsa.h"
25 #include "internal/sizes.h"
26 #include "internal/nelem.h"
27 #include "internal/param_build_set.h"
28
29 static OSSL_FUNC_keymgmt_new_fn dsa_newdata;
30 static OSSL_FUNC_keymgmt_free_fn dsa_freedata;
31 static OSSL_FUNC_keymgmt_gen_init_fn dsa_gen_init;
32 static OSSL_FUNC_keymgmt_gen_set_template_fn dsa_gen_set_template;
33 static OSSL_FUNC_keymgmt_gen_set_params_fn dsa_gen_set_params;
34 static OSSL_FUNC_keymgmt_gen_settable_params_fn dsa_gen_settable_params;
35 static OSSL_FUNC_keymgmt_gen_get_params_fn dsa_gen_get_params;
36 static OSSL_FUNC_keymgmt_gen_gettable_params_fn dsa_gen_gettable_params;
37 static OSSL_FUNC_keymgmt_gen_fn dsa_gen;
38 static OSSL_FUNC_keymgmt_gen_cleanup_fn dsa_gen_cleanup;
39 static OSSL_FUNC_keymgmt_load_fn dsa_load;
40 static OSSL_FUNC_keymgmt_get_params_fn dsa_get_params;
41 static OSSL_FUNC_keymgmt_gettable_params_fn dsa_gettable_params;
42 static OSSL_FUNC_keymgmt_has_fn dsa_has;
43 static OSSL_FUNC_keymgmt_match_fn dsa_match;
44 static OSSL_FUNC_keymgmt_validate_fn dsa_validate;
45 static OSSL_FUNC_keymgmt_import_fn dsa_import;
46 static OSSL_FUNC_keymgmt_import_types_fn dsa_import_types;
47 static OSSL_FUNC_keymgmt_export_fn dsa_export;
48 static OSSL_FUNC_keymgmt_export_types_fn dsa_export_types;
49 static OSSL_FUNC_keymgmt_dup_fn dsa_dup;
50
51 #define DSA_DEFAULT_MD "SHA256"
52 #define DSA_POSSIBLE_SELECTIONS \
53 (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS)
54
55 struct dsa_gen_ctx {
56 OSSL_LIB_CTX *libctx;
57
58 FFC_PARAMS *ffc_params;
59 int selection;
60 /* All these parameters are used for parameter generation only */
61 size_t pbits;
62 size_t qbits;
63 unsigned char *seed; /* optional FIPS186-4 param for testing */
64 size_t seedlen;
65 int gindex; /* optional FIPS186-4 generator index (ignored if -1) */
66 int gen_type; /* DSA_PARAMGEN_TYPE_FIPS_186_2 or DSA_PARAMGEN_TYPE_FIPS_186_4 */
67 int pcounter;
68 int hindex;
69 char *mdname;
70 char *mdprops;
71 OSSL_CALLBACK *cb;
72 void *cbarg;
73 OSSL_FIPS_IND_DECLARE
74 };
75 typedef struct dh_name2id_st {
76 const char *name;
77 int id;
78 } DSA_GENTYPE_NAME2ID;
79
80 static const DSA_GENTYPE_NAME2ID dsatype2id[] = {
81 #ifdef FIPS_MODULE
82 { "default", DSA_PARAMGEN_TYPE_FIPS_186_4 },
83 #else
84 { "default", DSA_PARAMGEN_TYPE_FIPS_DEFAULT },
85 #endif
86 { "fips186_4", DSA_PARAMGEN_TYPE_FIPS_186_4 },
87 { "fips186_2", DSA_PARAMGEN_TYPE_FIPS_186_2 },
88 };
89
dsa_gen_type_name2id(const char * name)90 static int dsa_gen_type_name2id(const char *name)
91 {
92 size_t i;
93
94 for (i = 0; i < OSSL_NELEM(dsatype2id); ++i) {
95 if (OPENSSL_strcasecmp(dsatype2id[i].name, name) == 0)
96 return dsatype2id[i].id;
97 }
98 return -1;
99 }
100
dsa_key_todata(DSA * dsa,OSSL_PARAM_BLD * bld,OSSL_PARAM params[],int include_private)101 static int dsa_key_todata(DSA *dsa, OSSL_PARAM_BLD *bld, OSSL_PARAM params[],
102 int include_private)
103 {
104 const BIGNUM *priv = NULL, *pub = NULL;
105
106 if (dsa == NULL)
107 return 0;
108
109 DSA_get0_key(dsa, &pub, &priv);
110 if (include_private
111 && priv != NULL
112 && !ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_PRIV_KEY, priv))
113 return 0;
114 if (pub != NULL
115 && !ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_PUB_KEY, pub))
116 return 0;
117
118 return 1;
119 }
120
dsa_newdata(void * provctx)121 static void *dsa_newdata(void *provctx)
122 {
123 if (!ossl_prov_is_running())
124 return NULL;
125 return ossl_dsa_new(PROV_LIBCTX_OF(provctx));
126 }
127
dsa_freedata(void * keydata)128 static void dsa_freedata(void *keydata)
129 {
130 DSA_free(keydata);
131 }
132
dsa_has(const void * keydata,int selection)133 static int dsa_has(const void *keydata, int selection)
134 {
135 const DSA *dsa = keydata;
136 int ok = 1;
137
138 if (!ossl_prov_is_running() || dsa == NULL)
139 return 0;
140 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
141 return 1; /* the selection is not missing */
142
143 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
144 ok = ok && (DSA_get0_pub_key(dsa) != NULL);
145 if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
146 ok = ok && (DSA_get0_priv_key(dsa) != NULL);
147 if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
148 ok = ok && (DSA_get0_p(dsa) != NULL && DSA_get0_g(dsa) != NULL);
149 return ok;
150 }
151
dsa_match(const void * keydata1,const void * keydata2,int selection)152 static int dsa_match(const void *keydata1, const void *keydata2, int selection)
153 {
154 const DSA *dsa1 = keydata1;
155 const DSA *dsa2 = keydata2;
156 int ok = 1;
157
158 if (!ossl_prov_is_running())
159 return 0;
160
161 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
162 int key_checked = 0;
163
164 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) {
165 const BIGNUM *pa = DSA_get0_pub_key(dsa1);
166 const BIGNUM *pb = DSA_get0_pub_key(dsa2);
167
168 if (pa != NULL && pb != NULL) {
169 ok = ok && BN_cmp(pa, pb) == 0;
170 key_checked = 1;
171 }
172 }
173 if (!key_checked
174 && (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
175 const BIGNUM *pa = DSA_get0_priv_key(dsa1);
176 const BIGNUM *pb = DSA_get0_priv_key(dsa2);
177
178 if (pa != NULL && pb != NULL) {
179 ok = ok && BN_cmp(pa, pb) == 0;
180 key_checked = 1;
181 }
182 }
183 ok = ok && key_checked;
184 }
185 if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) {
186 FFC_PARAMS *dsaparams1 = ossl_dsa_get0_params((DSA *)dsa1);
187 FFC_PARAMS *dsaparams2 = ossl_dsa_get0_params((DSA *)dsa2);
188
189 ok = ok && ossl_ffc_params_cmp(dsaparams1, dsaparams2, 1);
190 }
191 return ok;
192 }
193
dsa_import(void * keydata,int selection,const OSSL_PARAM params[])194 static int dsa_import(void *keydata, int selection, const OSSL_PARAM params[])
195 {
196 DSA *dsa = keydata;
197 int ok = 1;
198
199 if (!ossl_prov_is_running() || dsa == NULL)
200 return 0;
201
202 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
203 return 0;
204
205 /* a key without parameters is meaningless */
206 ok = ok && ossl_dsa_ffc_params_fromdata(dsa, params);
207
208 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
209 int include_private = selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
210
211 ok = ok && ossl_dsa_key_fromdata(dsa, params, include_private);
212 }
213
214 return ok;
215 }
216
dsa_export(void * keydata,int selection,OSSL_CALLBACK * param_cb,void * cbarg)217 static int dsa_export(void *keydata, int selection, OSSL_CALLBACK *param_cb,
218 void *cbarg)
219 {
220 DSA *dsa = keydata;
221 OSSL_PARAM_BLD *tmpl;
222 OSSL_PARAM *params = NULL;
223 int ok = 1;
224
225 if (!ossl_prov_is_running() || dsa == NULL)
226 return 0;
227
228 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
229 return 0;
230
231 tmpl = OSSL_PARAM_BLD_new();
232 if (tmpl == NULL)
233 return 0;
234
235 if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
236 ok = ok && ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), tmpl, NULL);
237 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
238 int include_private = selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
239
240 ok = ok && dsa_key_todata(dsa, tmpl, NULL, include_private);
241 }
242
243 if (!ok || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) {
244 ok = 0;
245 goto err;
246 }
247
248 ok = param_cb(params, cbarg);
249 OSSL_PARAM_free(params);
250 err:
251 OSSL_PARAM_BLD_free(tmpl);
252 return ok;
253 }
254
255 /* IMEXPORT = IMPORT + EXPORT */
256
257 #define DSA_IMEXPORTABLE_PARAMETERS \
258 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_P, NULL, 0), \
259 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_Q, NULL, 0), \
260 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_G, NULL, 0), \
261 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_COFACTOR, NULL, 0), \
262 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL), \
263 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL), \
264 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL), \
265 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0)
266 #define DSA_IMEXPORTABLE_PUBLIC_KEY \
267 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0)
268 #define DSA_IMEXPORTABLE_PRIVATE_KEY \
269 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0)
270 static const OSSL_PARAM dsa_all_types[] = {
271 DSA_IMEXPORTABLE_PARAMETERS,
272 DSA_IMEXPORTABLE_PUBLIC_KEY,
273 DSA_IMEXPORTABLE_PRIVATE_KEY,
274 OSSL_PARAM_END
275 };
276 static const OSSL_PARAM dsa_parameter_types[] = {
277 DSA_IMEXPORTABLE_PARAMETERS,
278 OSSL_PARAM_END
279 };
280 static const OSSL_PARAM dsa_key_types[] = {
281 DSA_IMEXPORTABLE_PUBLIC_KEY,
282 DSA_IMEXPORTABLE_PRIVATE_KEY,
283 OSSL_PARAM_END
284 };
285 static const OSSL_PARAM *dsa_types[] = {
286 NULL, /* Index 0 = none of them */
287 dsa_parameter_types, /* Index 1 = parameter types */
288 dsa_key_types, /* Index 2 = key types */
289 dsa_all_types /* Index 3 = 1 + 2 */
290 };
291
dsa_imexport_types(int selection)292 static const OSSL_PARAM *dsa_imexport_types(int selection)
293 {
294 int type_select = 0;
295
296 if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
297 type_select += 1;
298 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
299 type_select += 2;
300 return dsa_types[type_select];
301 }
302
dsa_import_types(int selection)303 static const OSSL_PARAM *dsa_import_types(int selection)
304 {
305 return dsa_imexport_types(selection);
306 }
307
dsa_export_types(int selection)308 static const OSSL_PARAM *dsa_export_types(int selection)
309 {
310 return dsa_imexport_types(selection);
311 }
312
dsa_get_params(void * key,OSSL_PARAM params[])313 static ossl_inline int dsa_get_params(void *key, OSSL_PARAM params[])
314 {
315 DSA *dsa = key;
316 OSSL_PARAM *p;
317
318 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
319 && !OSSL_PARAM_set_int(p, DSA_bits(dsa)))
320 return 0;
321 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
322 && !OSSL_PARAM_set_int(p, DSA_security_bits(dsa)))
323 return 0;
324 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
325 && !OSSL_PARAM_set_int(p, DSA_size(dsa)))
326 return 0;
327 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL
328 && !OSSL_PARAM_set_utf8_string(p, DSA_DEFAULT_MD))
329 return 0;
330 return ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), NULL, params)
331 && dsa_key_todata(dsa, NULL, params, 1);
332 }
333
334 static const OSSL_PARAM dsa_params[] = {
335 OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
336 OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
337 OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
338 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0),
339 DSA_IMEXPORTABLE_PARAMETERS,
340 DSA_IMEXPORTABLE_PUBLIC_KEY,
341 DSA_IMEXPORTABLE_PRIVATE_KEY,
342 OSSL_PARAM_END
343 };
344
dsa_gettable_params(void * provctx)345 static const OSSL_PARAM *dsa_gettable_params(void *provctx)
346 {
347 return dsa_params;
348 }
349
dsa_validate_domparams(const DSA * dsa,int checktype)350 static int dsa_validate_domparams(const DSA *dsa, int checktype)
351 {
352 int status = 0;
353
354 return ossl_dsa_check_params(dsa, checktype, &status);
355 }
356
dsa_validate_public(const DSA * dsa)357 static int dsa_validate_public(const DSA *dsa)
358 {
359 int status = 0;
360 const BIGNUM *pub_key = NULL;
361
362 DSA_get0_key(dsa, &pub_key, NULL);
363 if (pub_key == NULL)
364 return 0;
365 return ossl_dsa_check_pub_key(dsa, pub_key, &status);
366 }
367
dsa_validate_private(const DSA * dsa)368 static int dsa_validate_private(const DSA *dsa)
369 {
370 int status = 0;
371 const BIGNUM *priv_key = NULL;
372
373 DSA_get0_key(dsa, NULL, &priv_key);
374 if (priv_key == NULL)
375 return 0;
376 return ossl_dsa_check_priv_key(dsa, priv_key, &status);
377 }
378
dsa_validate(const void * keydata,int selection,int checktype)379 static int dsa_validate(const void *keydata, int selection, int checktype)
380 {
381 const DSA *dsa = keydata;
382 int ok = 1;
383
384 if (!ossl_prov_is_running())
385 return 0;
386
387 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
388 return 1; /* nothing to validate */
389
390 if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
391 ok = ok && dsa_validate_domparams(dsa, checktype);
392
393 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
394 ok = ok && dsa_validate_public(dsa);
395
396 if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
397 ok = ok && dsa_validate_private(dsa);
398
399 /* If the whole key is selected, we do a pairwise validation */
400 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR)
401 == OSSL_KEYMGMT_SELECT_KEYPAIR)
402 ok = ok && ossl_dsa_check_pairwise(dsa);
403 return ok;
404 }
405
dsa_gen_init(void * provctx,int selection,const OSSL_PARAM params[])406 static void *dsa_gen_init(void *provctx, int selection,
407 const OSSL_PARAM params[])
408 {
409 OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
410 struct dsa_gen_ctx *gctx = NULL;
411
412 if (!ossl_prov_is_running() || (selection & DSA_POSSIBLE_SELECTIONS) == 0)
413 return NULL;
414
415 if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) {
416 gctx->selection = selection;
417 gctx->libctx = libctx;
418 gctx->pbits = 2048;
419 gctx->qbits = 224;
420 #ifdef FIPS_MODULE
421 gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_186_4;
422 #else
423 gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_DEFAULT;
424 #endif
425 gctx->gindex = -1;
426 gctx->pcounter = -1;
427 gctx->hindex = 0;
428 OSSL_FIPS_IND_INIT(gctx)
429 }
430 if (!dsa_gen_set_params(gctx, params)) {
431 dsa_gen_cleanup(gctx);
432 gctx = NULL;
433 }
434 return gctx;
435 }
436
dsa_gen_set_template(void * genctx,void * templ)437 static int dsa_gen_set_template(void *genctx, void *templ)
438 {
439 struct dsa_gen_ctx *gctx = genctx;
440 DSA *dsa = templ;
441
442 if (!ossl_prov_is_running() || gctx == NULL || dsa == NULL)
443 return 0;
444 gctx->ffc_params = ossl_dsa_get0_params(dsa);
445 return 1;
446 }
447
dsa_set_gen_seed(struct dsa_gen_ctx * gctx,unsigned char * seed,size_t seedlen)448 static int dsa_set_gen_seed(struct dsa_gen_ctx *gctx, unsigned char *seed,
449 size_t seedlen)
450 {
451 OPENSSL_clear_free(gctx->seed, gctx->seedlen);
452 gctx->seed = NULL;
453 gctx->seedlen = 0;
454 if (seed != NULL && seedlen > 0) {
455 gctx->seed = OPENSSL_memdup(seed, seedlen);
456 if (gctx->seed == NULL)
457 return 0;
458 gctx->seedlen = seedlen;
459 }
460 return 1;
461 }
462
dsa_gen_set_params(void * genctx,const OSSL_PARAM params[])463 static int dsa_gen_set_params(void *genctx, const OSSL_PARAM params[])
464 {
465 struct dsa_gen_ctx *gctx = genctx;
466 const OSSL_PARAM *p;
467 int gen_type = -1;
468
469 if (gctx == NULL)
470 return 0;
471 if (ossl_param_is_empty(params))
472 return 1;
473
474 if (!OSSL_FIPS_IND_SET_CTX_PARAM(gctx, OSSL_FIPS_IND_SETTABLE0, params,
475 OSSL_PKEY_PARAM_FIPS_SIGN_CHECK))
476 return 0;
477
478 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_TYPE);
479 if (p != NULL) {
480 if (p->data_type != OSSL_PARAM_UTF8_STRING
481 || ((gen_type = dsa_gen_type_name2id(p->data)) == -1)) {
482 ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
483 return 0;
484 }
485
486 /*
487 * Only assign context gen_type if it was set by dsa_gen_type_name2id
488 * must be in range:
489 * DSA_PARAMGEN_TYPE_FIPS_186_4 <= gen_type <= DSA_PARAMGEN_TYPE_FIPS_DEFAULT
490 */
491 if (gen_type != -1)
492 gctx->gen_type = gen_type;
493 }
494 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_GINDEX);
495 if (p != NULL
496 && !OSSL_PARAM_get_int(p, &gctx->gindex))
497 return 0;
498 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PCOUNTER);
499 if (p != NULL
500 && !OSSL_PARAM_get_int(p, &gctx->pcounter))
501 return 0;
502 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_H);
503 if (p != NULL
504 && !OSSL_PARAM_get_int(p, &gctx->hindex))
505 return 0;
506 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_SEED);
507 if (p != NULL
508 && (p->data_type != OSSL_PARAM_OCTET_STRING
509 || !dsa_set_gen_seed(gctx, p->data, p->data_size)))
510 return 0;
511 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PBITS)) != NULL
512 && !OSSL_PARAM_get_size_t(p, &gctx->pbits))
513 return 0;
514 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_QBITS)) != NULL
515 && !OSSL_PARAM_get_size_t(p, &gctx->qbits))
516 return 0;
517 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST);
518 if (p != NULL) {
519 if (p->data_type != OSSL_PARAM_UTF8_STRING)
520 return 0;
521 OPENSSL_free(gctx->mdname);
522 gctx->mdname = OPENSSL_strdup(p->data);
523 if (gctx->mdname == NULL)
524 return 0;
525 }
526 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST_PROPS);
527 if (p != NULL) {
528 if (p->data_type != OSSL_PARAM_UTF8_STRING)
529 return 0;
530 OPENSSL_free(gctx->mdprops);
531 gctx->mdprops = OPENSSL_strdup(p->data);
532 if (gctx->mdprops == NULL)
533 return 0;
534 }
535 return 1;
536 }
537
dsa_gen_settable_params(ossl_unused void * genctx,ossl_unused void * provctx)538 static const OSSL_PARAM *dsa_gen_settable_params(ossl_unused void *genctx,
539 ossl_unused void *provctx)
540 {
541 static OSSL_PARAM settable[] = {
542 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE, NULL, 0),
543 OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_PBITS, NULL),
544 OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_QBITS, NULL),
545 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST, NULL, 0),
546 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST_PROPS, NULL, 0),
547 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL),
548 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0),
549 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL),
550 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL),
551 OSSL_FIPS_IND_SETTABLE_CTX_PARAM(OSSL_PKEY_PARAM_FIPS_SIGN_CHECK)
552 OSSL_PARAM_END
553 };
554 return settable;
555 }
556
dsa_gen_get_params(void * genctx,OSSL_PARAM * params)557 static int dsa_gen_get_params(void *genctx, OSSL_PARAM *params)
558 {
559 struct dsa_gen_ctx *gctx = genctx;
560
561 if (gctx == NULL)
562 return 0;
563 if (ossl_param_is_empty(params))
564 return 1;
565 if (!OSSL_FIPS_IND_GET_CTX_PARAM(gctx, params))
566 return 0;
567 return 1;
568 }
569
dsa_gen_gettable_params(ossl_unused void * ctx,ossl_unused void * provctx)570 static const OSSL_PARAM *dsa_gen_gettable_params(ossl_unused void *ctx,
571 ossl_unused void *provctx)
572 {
573 static const OSSL_PARAM dsa_gen_gettable_params_table[] = {
574 OSSL_FIPS_IND_GETTABLE_CTX_PARAM()
575 OSSL_PARAM_END
576 };
577
578 return dsa_gen_gettable_params_table;
579 }
580
dsa_gencb(int p,int n,BN_GENCB * cb)581 static int dsa_gencb(int p, int n, BN_GENCB *cb)
582 {
583 struct dsa_gen_ctx *gctx = BN_GENCB_get_arg(cb);
584 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END };
585
586 params[0] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_POTENTIAL, &p);
587 params[1] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_ITERATION, &n);
588
589 return gctx->cb(params, gctx->cbarg);
590 }
591
dsa_gen(void * genctx,OSSL_CALLBACK * osslcb,void * cbarg)592 static void *dsa_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
593 {
594 struct dsa_gen_ctx *gctx = genctx;
595 DSA *dsa = NULL;
596 BN_GENCB *gencb = NULL;
597 int ret = 0;
598 FFC_PARAMS *ffc;
599
600 if (!ossl_prov_is_running() || gctx == NULL)
601 return NULL;
602
603 #ifdef FIPS_MODULE
604 /*
605 * DSA signing is not approved in FIPS 140-3, so there is no
606 * need for DSA keygen either.
607 */
608 if (!OSSL_FIPS_IND_ON_UNAPPROVED(gctx, OSSL_FIPS_IND_SETTABLE0,
609 gctx->libctx, "DSA", "Keygen",
610 ossl_fips_config_dsa_sign_disallowed))
611 return 0;
612 #endif
613
614 dsa = ossl_dsa_new(gctx->libctx);
615 if (dsa == NULL)
616 return NULL;
617
618 if (gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_DEFAULT)
619 gctx->gen_type = (gctx->pbits >= 2048 ? DSA_PARAMGEN_TYPE_FIPS_186_4 : DSA_PARAMGEN_TYPE_FIPS_186_2);
620
621 /*
622 * Do a bounds check on context gen_type. Must be in range:
623 * DSA_PARAMGEN_TYPE_FIPS_186_4 <= gen_type <= DSA_PARAMGEN_TYPE_FIPS_DEFAULT
624 * Noted here as this needs to be adjusted if a new type is
625 * added.
626 */
627 if (!ossl_assert((gctx->gen_type >= DSA_PARAMGEN_TYPE_FIPS_186_4)
628 && (gctx->gen_type <= DSA_PARAMGEN_TYPE_FIPS_DEFAULT))) {
629 ERR_raise_data(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR,
630 "gen_type set to unsupported value %d", gctx->gen_type);
631 goto end;
632 }
633
634 gctx->cb = osslcb;
635 gctx->cbarg = cbarg;
636 gencb = BN_GENCB_new();
637 if (gencb != NULL)
638 BN_GENCB_set(gencb, dsa_gencb, genctx);
639
640 ffc = ossl_dsa_get0_params(dsa);
641 /* Copy the template value if one was passed */
642 if (gctx->ffc_params != NULL
643 && !ossl_ffc_params_copy(ffc, gctx->ffc_params))
644 goto end;
645
646 if (gctx->seed != NULL
647 && !ossl_ffc_params_set_seed(ffc, gctx->seed, gctx->seedlen))
648 goto end;
649 if (gctx->gindex != -1) {
650 ossl_ffc_params_set_gindex(ffc, gctx->gindex);
651 if (gctx->pcounter != -1)
652 ossl_ffc_params_set_pcounter(ffc, gctx->pcounter);
653 } else if (gctx->hindex != 0) {
654 ossl_ffc_params_set_h(ffc, gctx->hindex);
655 }
656 if (gctx->mdname != NULL)
657 ossl_ffc_set_digest(ffc, gctx->mdname, gctx->mdprops);
658
659 if ((gctx->selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) {
660
661 if (ossl_dsa_generate_ffc_parameters(dsa, gctx->gen_type,
662 gctx->pbits, gctx->qbits,
663 gencb)
664 <= 0)
665 goto end;
666 }
667 ossl_ffc_params_enable_flags(ffc, FFC_PARAM_FLAG_VALIDATE_LEGACY,
668 gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_186_2);
669 if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
670 if (ffc->p == NULL
671 || ffc->q == NULL
672 || ffc->g == NULL)
673 goto end;
674 if (DSA_generate_key(dsa) <= 0)
675 goto end;
676 }
677 ret = 1;
678 end:
679 if (ret <= 0) {
680 DSA_free(dsa);
681 dsa = NULL;
682 }
683 BN_GENCB_free(gencb);
684 return dsa;
685 }
686
dsa_gen_cleanup(void * genctx)687 static void dsa_gen_cleanup(void *genctx)
688 {
689 struct dsa_gen_ctx *gctx = genctx;
690
691 if (gctx == NULL)
692 return;
693
694 OPENSSL_free(gctx->mdname);
695 OPENSSL_free(gctx->mdprops);
696 OPENSSL_clear_free(gctx->seed, gctx->seedlen);
697 OPENSSL_free(gctx);
698 }
699
dsa_load(const void * reference,size_t reference_sz)700 static void *dsa_load(const void *reference, size_t reference_sz)
701 {
702 DSA *dsa = NULL;
703
704 if (ossl_prov_is_running() && reference_sz == sizeof(dsa)) {
705 /* The contents of the reference is the address to our object */
706 dsa = *(DSA **)reference;
707 /* We grabbed, so we detach it */
708 *(DSA **)reference = NULL;
709 return dsa;
710 }
711 return NULL;
712 }
713
dsa_dup(const void * keydata_from,int selection)714 static void *dsa_dup(const void *keydata_from, int selection)
715 {
716 if (ossl_prov_is_running())
717 return ossl_dsa_dup(keydata_from, selection);
718 return NULL;
719 }
720
721 const OSSL_DISPATCH ossl_dsa_keymgmt_functions[] = {
722 { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dsa_newdata },
723 { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))dsa_gen_init },
724 { OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, (void (*)(void))dsa_gen_set_template },
725 { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))dsa_gen_set_params },
726 { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
727 (void (*)(void))dsa_gen_settable_params },
728 { OSSL_FUNC_KEYMGMT_GEN_GET_PARAMS, (void (*)(void))dsa_gen_get_params },
729 { OSSL_FUNC_KEYMGMT_GEN_GETTABLE_PARAMS,
730 (void (*)(void))dsa_gen_gettable_params },
731 { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))dsa_gen },
732 { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))dsa_gen_cleanup },
733 { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))dsa_load },
734 { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dsa_freedata },
735 { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*)(void))dsa_get_params },
736 { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*)(void))dsa_gettable_params },
737 { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dsa_has },
738 { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))dsa_match },
739 { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))dsa_validate },
740 { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dsa_import },
741 { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dsa_import_types },
742 { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dsa_export },
743 { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dsa_export_types },
744 { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))dsa_dup },
745 OSSL_DISPATCH_END
746 };
747