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 =
210 selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
211
212 ok = ok && ossl_dsa_key_fromdata(dsa, params, include_private);
213 }
214
215 return ok;
216 }
217
dsa_export(void * keydata,int selection,OSSL_CALLBACK * param_cb,void * cbarg)218 static int dsa_export(void *keydata, int selection, OSSL_CALLBACK *param_cb,
219 void *cbarg)
220 {
221 DSA *dsa = keydata;
222 OSSL_PARAM_BLD *tmpl;
223 OSSL_PARAM *params = NULL;
224 int ok = 1;
225
226 if (!ossl_prov_is_running() || dsa == NULL)
227 return 0;
228
229 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
230 return 0;
231
232 tmpl = OSSL_PARAM_BLD_new();
233 if (tmpl == NULL)
234 return 0;
235
236 if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
237 ok = ok && ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), tmpl, NULL);
238 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
239 int include_private =
240 selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
241
242 ok = ok && dsa_key_todata(dsa, tmpl, NULL, include_private);
243 }
244
245 if (!ok || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) {
246 ok = 0;
247 goto err;
248 }
249
250 ok = param_cb(params, cbarg);
251 OSSL_PARAM_free(params);
252 err:
253 OSSL_PARAM_BLD_free(tmpl);
254 return ok;
255 }
256
257 /* IMEXPORT = IMPORT + EXPORT */
258
259 # define DSA_IMEXPORTABLE_PARAMETERS \
260 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_P, NULL, 0), \
261 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_Q, NULL, 0), \
262 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_G, NULL, 0), \
263 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_COFACTOR, NULL, 0), \
264 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL), \
265 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL), \
266 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL), \
267 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0)
268 # define DSA_IMEXPORTABLE_PUBLIC_KEY \
269 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0)
270 # define DSA_IMEXPORTABLE_PRIVATE_KEY \
271 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0)
272 static const OSSL_PARAM dsa_all_types[] = {
273 DSA_IMEXPORTABLE_PARAMETERS,
274 DSA_IMEXPORTABLE_PUBLIC_KEY,
275 DSA_IMEXPORTABLE_PRIVATE_KEY,
276 OSSL_PARAM_END
277 };
278 static const OSSL_PARAM dsa_parameter_types[] = {
279 DSA_IMEXPORTABLE_PARAMETERS,
280 OSSL_PARAM_END
281 };
282 static const OSSL_PARAM dsa_key_types[] = {
283 DSA_IMEXPORTABLE_PUBLIC_KEY,
284 DSA_IMEXPORTABLE_PRIVATE_KEY,
285 OSSL_PARAM_END
286 };
287 static const OSSL_PARAM *dsa_types[] = {
288 NULL, /* Index 0 = none of them */
289 dsa_parameter_types, /* Index 1 = parameter types */
290 dsa_key_types, /* Index 2 = key types */
291 dsa_all_types /* Index 3 = 1 + 2 */
292 };
293
dsa_imexport_types(int selection)294 static const OSSL_PARAM *dsa_imexport_types(int selection)
295 {
296 int type_select = 0;
297
298 if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
299 type_select += 1;
300 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
301 type_select += 2;
302 return dsa_types[type_select];
303 }
304
dsa_import_types(int selection)305 static const OSSL_PARAM *dsa_import_types(int selection)
306 {
307 return dsa_imexport_types(selection);
308 }
309
dsa_export_types(int selection)310 static const OSSL_PARAM *dsa_export_types(int selection)
311 {
312 return dsa_imexport_types(selection);
313 }
314
dsa_get_params(void * key,OSSL_PARAM params[])315 static ossl_inline int dsa_get_params(void *key, OSSL_PARAM params[])
316 {
317 DSA *dsa = key;
318 OSSL_PARAM *p;
319
320 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
321 && !OSSL_PARAM_set_int(p, DSA_bits(dsa)))
322 return 0;
323 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
324 && !OSSL_PARAM_set_int(p, DSA_security_bits(dsa)))
325 return 0;
326 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
327 && !OSSL_PARAM_set_int(p, DSA_size(dsa)))
328 return 0;
329 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL
330 && !OSSL_PARAM_set_utf8_string(p, DSA_DEFAULT_MD))
331 return 0;
332 return ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), NULL, params)
333 && dsa_key_todata(dsa, NULL, params, 1);
334 }
335
336 static const OSSL_PARAM dsa_params[] = {
337 OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
338 OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
339 OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
340 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0),
341 DSA_IMEXPORTABLE_PARAMETERS,
342 DSA_IMEXPORTABLE_PUBLIC_KEY,
343 DSA_IMEXPORTABLE_PRIVATE_KEY,
344 OSSL_PARAM_END
345 };
346
dsa_gettable_params(void * provctx)347 static const OSSL_PARAM *dsa_gettable_params(void *provctx)
348 {
349 return dsa_params;
350 }
351
dsa_validate_domparams(const DSA * dsa,int checktype)352 static int dsa_validate_domparams(const DSA *dsa, int checktype)
353 {
354 int status = 0;
355
356 return ossl_dsa_check_params(dsa, checktype, &status);
357 }
358
dsa_validate_public(const DSA * dsa)359 static int dsa_validate_public(const DSA *dsa)
360 {
361 int status = 0;
362 const BIGNUM *pub_key = NULL;
363
364 DSA_get0_key(dsa, &pub_key, NULL);
365 if (pub_key == NULL)
366 return 0;
367 return ossl_dsa_check_pub_key(dsa, pub_key, &status);
368 }
369
dsa_validate_private(const DSA * dsa)370 static int dsa_validate_private(const DSA *dsa)
371 {
372 int status = 0;
373 const BIGNUM *priv_key = NULL;
374
375 DSA_get0_key(dsa, NULL, &priv_key);
376 if (priv_key == NULL)
377 return 0;
378 return ossl_dsa_check_priv_key(dsa, priv_key, &status);
379 }
380
dsa_validate(const void * keydata,int selection,int checktype)381 static int dsa_validate(const void *keydata, int selection, int checktype)
382 {
383 const DSA *dsa = keydata;
384 int ok = 1;
385
386 if (!ossl_prov_is_running())
387 return 0;
388
389 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
390 return 1; /* nothing to validate */
391
392 if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
393 ok = ok && dsa_validate_domparams(dsa, checktype);
394
395 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
396 ok = ok && dsa_validate_public(dsa);
397
398 if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
399 ok = ok && dsa_validate_private(dsa);
400
401 /* If the whole key is selected, we do a pairwise validation */
402 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR)
403 == OSSL_KEYMGMT_SELECT_KEYPAIR)
404 ok = ok && ossl_dsa_check_pairwise(dsa);
405 return ok;
406 }
407
dsa_gen_init(void * provctx,int selection,const OSSL_PARAM params[])408 static void *dsa_gen_init(void *provctx, int selection,
409 const OSSL_PARAM params[])
410 {
411 OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
412 struct dsa_gen_ctx *gctx = NULL;
413
414 if (!ossl_prov_is_running() || (selection & DSA_POSSIBLE_SELECTIONS) == 0)
415 return NULL;
416
417 if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) {
418 gctx->selection = selection;
419 gctx->libctx = libctx;
420 gctx->pbits = 2048;
421 gctx->qbits = 224;
422 #ifdef FIPS_MODULE
423 gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_186_4;
424 #else
425 gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_DEFAULT;
426 #endif
427 gctx->gindex = -1;
428 gctx->pcounter = -1;
429 gctx->hindex = 0;
430 OSSL_FIPS_IND_INIT(gctx)
431 }
432 if (!dsa_gen_set_params(gctx, params)) {
433 dsa_gen_cleanup(gctx);
434 gctx = NULL;
435 }
436 return gctx;
437 }
438
dsa_gen_set_template(void * genctx,void * templ)439 static int dsa_gen_set_template(void *genctx, void *templ)
440 {
441 struct dsa_gen_ctx *gctx = genctx;
442 DSA *dsa = templ;
443
444 if (!ossl_prov_is_running() || gctx == NULL || dsa == NULL)
445 return 0;
446 gctx->ffc_params = ossl_dsa_get0_params(dsa);
447 return 1;
448 }
449
dsa_set_gen_seed(struct dsa_gen_ctx * gctx,unsigned char * seed,size_t seedlen)450 static int dsa_set_gen_seed(struct dsa_gen_ctx *gctx, unsigned char *seed,
451 size_t seedlen)
452 {
453 OPENSSL_clear_free(gctx->seed, gctx->seedlen);
454 gctx->seed = NULL;
455 gctx->seedlen = 0;
456 if (seed != NULL && seedlen > 0) {
457 gctx->seed = OPENSSL_memdup(seed, seedlen);
458 if (gctx->seed == NULL)
459 return 0;
460 gctx->seedlen = seedlen;
461 }
462 return 1;
463 }
464
dsa_gen_set_params(void * genctx,const OSSL_PARAM params[])465 static int dsa_gen_set_params(void *genctx, const OSSL_PARAM params[])
466 {
467 struct dsa_gen_ctx *gctx = genctx;
468 const OSSL_PARAM *p;
469 int gen_type = -1;
470
471 if (gctx == NULL)
472 return 0;
473 if (ossl_param_is_empty(params))
474 return 1;
475
476 if (!OSSL_FIPS_IND_SET_CTX_PARAM(gctx, OSSL_FIPS_IND_SETTABLE0, params,
477 OSSL_PKEY_PARAM_FIPS_SIGN_CHECK))
478 return 0;
479
480 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_TYPE);
481 if (p != NULL) {
482 if (p->data_type != OSSL_PARAM_UTF8_STRING
483 || ((gen_type = dsa_gen_type_name2id(p->data)) == -1)) {
484 ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
485 return 0;
486 }
487
488 /*
489 * Only assign context gen_type if it was set by dsa_gen_type_name2id
490 * must be in range:
491 * DSA_PARAMGEN_TYPE_FIPS_186_4 <= gen_type <= DSA_PARAMGEN_TYPE_FIPS_DEFAULT
492 */
493 if (gen_type != -1)
494 gctx->gen_type = gen_type;
495 }
496 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_GINDEX);
497 if (p != NULL
498 && !OSSL_PARAM_get_int(p, &gctx->gindex))
499 return 0;
500 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PCOUNTER);
501 if (p != NULL
502 && !OSSL_PARAM_get_int(p, &gctx->pcounter))
503 return 0;
504 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_H);
505 if (p != NULL
506 && !OSSL_PARAM_get_int(p, &gctx->hindex))
507 return 0;
508 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_SEED);
509 if (p != NULL
510 && (p->data_type != OSSL_PARAM_OCTET_STRING
511 || !dsa_set_gen_seed(gctx, p->data, p->data_size)))
512 return 0;
513 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PBITS)) != NULL
514 && !OSSL_PARAM_get_size_t(p, &gctx->pbits))
515 return 0;
516 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_QBITS)) != NULL
517 && !OSSL_PARAM_get_size_t(p, &gctx->qbits))
518 return 0;
519 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST);
520 if (p != NULL) {
521 if (p->data_type != OSSL_PARAM_UTF8_STRING)
522 return 0;
523 OPENSSL_free(gctx->mdname);
524 gctx->mdname = OPENSSL_strdup(p->data);
525 if (gctx->mdname == NULL)
526 return 0;
527 }
528 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST_PROPS);
529 if (p != NULL) {
530 if (p->data_type != OSSL_PARAM_UTF8_STRING)
531 return 0;
532 OPENSSL_free(gctx->mdprops);
533 gctx->mdprops = OPENSSL_strdup(p->data);
534 if (gctx->mdprops == NULL)
535 return 0;
536 }
537 return 1;
538 }
539
dsa_gen_settable_params(ossl_unused void * genctx,ossl_unused void * provctx)540 static const OSSL_PARAM *dsa_gen_settable_params(ossl_unused void *genctx,
541 ossl_unused void *provctx)
542 {
543 static OSSL_PARAM settable[] = {
544 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE, NULL, 0),
545 OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_PBITS, NULL),
546 OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_QBITS, NULL),
547 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST, NULL, 0),
548 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST_PROPS, NULL, 0),
549 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL),
550 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0),
551 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL),
552 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL),
553 OSSL_FIPS_IND_SETTABLE_CTX_PARAM(OSSL_PKEY_PARAM_FIPS_SIGN_CHECK)
554 OSSL_PARAM_END
555 };
556 return settable;
557 }
558
dsa_gen_get_params(void * genctx,OSSL_PARAM * params)559 static int dsa_gen_get_params(void *genctx, OSSL_PARAM *params)
560 {
561 struct dsa_gen_ctx *gctx = genctx;
562
563 if (gctx == NULL)
564 return 0;
565 if (ossl_param_is_empty(params))
566 return 1;
567 if (!OSSL_FIPS_IND_GET_CTX_PARAM(gctx, params))
568 return 0;
569 return 1;
570 }
571
dsa_gen_gettable_params(ossl_unused void * ctx,ossl_unused void * provctx)572 static const OSSL_PARAM *dsa_gen_gettable_params(ossl_unused void *ctx,
573 ossl_unused void *provctx)
574 {
575 static const OSSL_PARAM dsa_gen_gettable_params_table[] = {
576 OSSL_FIPS_IND_GETTABLE_CTX_PARAM()
577 OSSL_PARAM_END
578 };
579
580 return dsa_gen_gettable_params_table;
581 }
582
dsa_gencb(int p,int n,BN_GENCB * cb)583 static int dsa_gencb(int p, int n, BN_GENCB *cb)
584 {
585 struct dsa_gen_ctx *gctx = BN_GENCB_get_arg(cb);
586 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END };
587
588 params[0] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_POTENTIAL, &p);
589 params[1] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_ITERATION, &n);
590
591 return gctx->cb(params, gctx->cbarg);
592 }
593
dsa_gen(void * genctx,OSSL_CALLBACK * osslcb,void * cbarg)594 static void *dsa_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
595 {
596 struct dsa_gen_ctx *gctx = genctx;
597 DSA *dsa = NULL;
598 BN_GENCB *gencb = NULL;
599 int ret = 0;
600 FFC_PARAMS *ffc;
601
602 if (!ossl_prov_is_running() || gctx == NULL)
603 return NULL;
604
605 #ifdef FIPS_MODULE
606 /*
607 * DSA signing is not approved in FIPS 140-3, so there is no
608 * need for DSA keygen either.
609 */
610 if (!OSSL_FIPS_IND_ON_UNAPPROVED(gctx, OSSL_FIPS_IND_SETTABLE0,
611 gctx->libctx, "DSA", "Keygen",
612 ossl_fips_config_dsa_sign_disallowed))
613 return 0;
614 #endif
615
616 dsa = ossl_dsa_new(gctx->libctx);
617 if (dsa == NULL)
618 return NULL;
619
620 if (gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_DEFAULT)
621 gctx->gen_type = (gctx->pbits >= 2048 ? DSA_PARAMGEN_TYPE_FIPS_186_4 :
622 DSA_PARAMGEN_TYPE_FIPS_186_2);
623
624 /*
625 * Do a bounds check on context gen_type. Must be in range:
626 * DSA_PARAMGEN_TYPE_FIPS_186_4 <= gen_type <= DSA_PARAMGEN_TYPE_FIPS_DEFAULT
627 * Noted here as this needs to be adjusted if a new type is
628 * added.
629 */
630 if (!ossl_assert((gctx->gen_type >= DSA_PARAMGEN_TYPE_FIPS_186_4)
631 && (gctx->gen_type <= DSA_PARAMGEN_TYPE_FIPS_DEFAULT))) {
632 ERR_raise_data(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR,
633 "gen_type set to unsupported value %d", gctx->gen_type);
634 return NULL;
635 }
636
637 gctx->cb = osslcb;
638 gctx->cbarg = cbarg;
639 gencb = BN_GENCB_new();
640 if (gencb != NULL)
641 BN_GENCB_set(gencb, dsa_gencb, genctx);
642
643 ffc = ossl_dsa_get0_params(dsa);
644 /* Copy the template value if one was passed */
645 if (gctx->ffc_params != NULL
646 && !ossl_ffc_params_copy(ffc, gctx->ffc_params))
647 goto end;
648
649 if (gctx->seed != NULL
650 && !ossl_ffc_params_set_seed(ffc, gctx->seed, gctx->seedlen))
651 goto end;
652 if (gctx->gindex != -1) {
653 ossl_ffc_params_set_gindex(ffc, gctx->gindex);
654 if (gctx->pcounter != -1)
655 ossl_ffc_params_set_pcounter(ffc, gctx->pcounter);
656 } else if (gctx->hindex != 0) {
657 ossl_ffc_params_set_h(ffc, gctx->hindex);
658 }
659 if (gctx->mdname != NULL)
660 ossl_ffc_set_digest(ffc, gctx->mdname, gctx->mdprops);
661
662 if ((gctx->selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) {
663
664 if (ossl_dsa_generate_ffc_parameters(dsa, gctx->gen_type,
665 gctx->pbits, gctx->qbits,
666 gencb) <= 0)
667 goto end;
668 }
669 ossl_ffc_params_enable_flags(ffc, FFC_PARAM_FLAG_VALIDATE_LEGACY,
670 gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_186_2);
671 if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
672 if (ffc->p == NULL
673 || ffc->q == NULL
674 || ffc->g == NULL)
675 goto end;
676 if (DSA_generate_key(dsa) <= 0)
677 goto end;
678 }
679 ret = 1;
680 end:
681 if (ret <= 0) {
682 DSA_free(dsa);
683 dsa = NULL;
684 }
685 BN_GENCB_free(gencb);
686 return dsa;
687 }
688
dsa_gen_cleanup(void * genctx)689 static void dsa_gen_cleanup(void *genctx)
690 {
691 struct dsa_gen_ctx *gctx = genctx;
692
693 if (gctx == NULL)
694 return;
695
696 OPENSSL_free(gctx->mdname);
697 OPENSSL_free(gctx->mdprops);
698 OPENSSL_clear_free(gctx->seed, gctx->seedlen);
699 OPENSSL_free(gctx);
700 }
701
dsa_load(const void * reference,size_t reference_sz)702 static void *dsa_load(const void *reference, size_t reference_sz)
703 {
704 DSA *dsa = NULL;
705
706 if (ossl_prov_is_running() && reference_sz == sizeof(dsa)) {
707 /* The contents of the reference is the address to our object */
708 dsa = *(DSA **)reference;
709 /* We grabbed, so we detach it */
710 *(DSA **)reference = NULL;
711 return dsa;
712 }
713 return NULL;
714 }
715
dsa_dup(const void * keydata_from,int selection)716 static void *dsa_dup(const void *keydata_from, int selection)
717 {
718 if (ossl_prov_is_running())
719 return ossl_dsa_dup(keydata_from, selection);
720 return NULL;
721 }
722
723 const OSSL_DISPATCH ossl_dsa_keymgmt_functions[] = {
724 { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dsa_newdata },
725 { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))dsa_gen_init },
726 { OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, (void (*)(void))dsa_gen_set_template },
727 { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))dsa_gen_set_params },
728 { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
729 (void (*)(void))dsa_gen_settable_params },
730 { OSSL_FUNC_KEYMGMT_GEN_GET_PARAMS, (void (*)(void))dsa_gen_get_params },
731 { OSSL_FUNC_KEYMGMT_GEN_GETTABLE_PARAMS,
732 (void (*)(void))dsa_gen_gettable_params },
733 { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))dsa_gen },
734 { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))dsa_gen_cleanup },
735 { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))dsa_load },
736 { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dsa_freedata },
737 { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dsa_get_params },
738 { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dsa_gettable_params },
739 { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dsa_has },
740 { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))dsa_match },
741 { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))dsa_validate },
742 { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dsa_import },
743 { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dsa_import_types },
744 { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dsa_export },
745 { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dsa_export_types },
746 { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))dsa_dup },
747 OSSL_DISPATCH_END
748 };
749
