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source: vbox/trunk/src/libs/openssl-3.1.5/providers/implementations/keymgmt/dsa_kmgmt.c@ 104078

Last change on this file since 104078 was 104078, checked in by vboxsync, 11 months ago

openssl-3.1.5: Applied and adjusted our OpenSSL changes to 3.1.4. bugref:10638
File size: 21.3 KB
Line 
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
28static OSSL_FUNC_keymgmt_new_fn dsa_newdata;
29static OSSL_FUNC_keymgmt_free_fn dsa_freedata;
30static OSSL_FUNC_keymgmt_gen_init_fn dsa_gen_init;
31static OSSL_FUNC_keymgmt_gen_set_template_fn dsa_gen_set_template;
32static OSSL_FUNC_keymgmt_gen_set_params_fn dsa_gen_set_params;
33static OSSL_FUNC_keymgmt_gen_settable_params_fn dsa_gen_settable_params;
34static OSSL_FUNC_keymgmt_gen_fn dsa_gen;
35static OSSL_FUNC_keymgmt_gen_cleanup_fn dsa_gen_cleanup;
36static OSSL_FUNC_keymgmt_load_fn dsa_load;
37static OSSL_FUNC_keymgmt_get_params_fn dsa_get_params;
38static OSSL_FUNC_keymgmt_gettable_params_fn dsa_gettable_params;
39static OSSL_FUNC_keymgmt_has_fn dsa_has;
40static OSSL_FUNC_keymgmt_match_fn dsa_match;
41static OSSL_FUNC_keymgmt_validate_fn dsa_validate;
42static OSSL_FUNC_keymgmt_import_fn dsa_import;
43static OSSL_FUNC_keymgmt_import_types_fn dsa_import_types;
44static OSSL_FUNC_keymgmt_export_fn dsa_export;
45static OSSL_FUNC_keymgmt_export_types_fn dsa_export_types;
46static 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
52struct 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};
71typedef struct dh_name2id_st{
72 const char *name;
73 int id;
74} DSA_GENTYPE_NAME2ID;
75
76static 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
87static 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
98static 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
118static 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
125static void dsa_freedata(void *keydata)
126{
127 DSA_free(keydata);
128}
129
130static 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
149static 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
191static 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
215static 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 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
227 return 0;
228
229 tmpl = OSSL_PARAM_BLD_new();
230 if (tmpl == NULL)
231 return 0;
232
233 if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
234 ok = ok && ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), tmpl, NULL);
235 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
236 int include_private =
237 selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
238
239 ok = ok && dsa_key_todata(dsa, tmpl, NULL, include_private);
240 }
241
242 if (!ok || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) {
243 ok = 0;
244 goto err;
245 }
246
247 ok = param_cb(params, cbarg);
248 OSSL_PARAM_free(params);
249err:
250 OSSL_PARAM_BLD_free(tmpl);
251 return ok;
252}
253
254/* IMEXPORT = IMPORT + EXPORT */
255
256# define DSA_IMEXPORTABLE_PARAMETERS \
257 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_P, NULL, 0), \
258 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_Q, NULL, 0), \
259 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_G, NULL, 0), \
260 OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_COFACTOR, NULL, 0), \
261 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL), \
262 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL), \
263 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL), \
264 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0)
265# define DSA_IMEXPORTABLE_PUBLIC_KEY \
266 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0)
267# define DSA_IMEXPORTABLE_PRIVATE_KEY \
268 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0)
269static const OSSL_PARAM dsa_all_types[] = {
270 DSA_IMEXPORTABLE_PARAMETERS,
271 DSA_IMEXPORTABLE_PUBLIC_KEY,
272 DSA_IMEXPORTABLE_PRIVATE_KEY,
273 OSSL_PARAM_END
274};
275static const OSSL_PARAM dsa_parameter_types[] = {
276 DSA_IMEXPORTABLE_PARAMETERS,
277 OSSL_PARAM_END
278};
279static const OSSL_PARAM dsa_key_types[] = {
280 DSA_IMEXPORTABLE_PUBLIC_KEY,
281 DSA_IMEXPORTABLE_PRIVATE_KEY,
282 OSSL_PARAM_END
283};
284static const OSSL_PARAM *dsa_types[] = {
285 NULL, /* Index 0 = none of them */
286 dsa_parameter_types, /* Index 1 = parameter types */
287 dsa_key_types, /* Index 2 = key types */
288 dsa_all_types /* Index 3 = 1 + 2 */
289};
290
291static const OSSL_PARAM *dsa_imexport_types(int selection)
292{
293 int type_select = 0;
294
295 if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
296 type_select += 1;
297 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
298 type_select += 2;
299 return dsa_types[type_select];
300}
301
302static const OSSL_PARAM *dsa_import_types(int selection)
303{
304 return dsa_imexport_types(selection);
305}
306
307static const OSSL_PARAM *dsa_export_types(int selection)
308{
309 return dsa_imexport_types(selection);
310}
311
312static ossl_inline int dsa_get_params(void *key, OSSL_PARAM params[])
313{
314 DSA *dsa = key;
315 OSSL_PARAM *p;
316
317 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
318 && !OSSL_PARAM_set_int(p, DSA_bits(dsa)))
319 return 0;
320 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
321 && !OSSL_PARAM_set_int(p, DSA_security_bits(dsa)))
322 return 0;
323 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
324 && !OSSL_PARAM_set_int(p, DSA_size(dsa)))
325 return 0;
326 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL
327 && !OSSL_PARAM_set_utf8_string(p, DSA_DEFAULT_MD))
328 return 0;
329 return ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), NULL, params)
330 && dsa_key_todata(dsa, NULL, params, 1);
331}
332
333static const OSSL_PARAM dsa_params[] = {
334 OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
335 OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
336 OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
337 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0),
338 DSA_IMEXPORTABLE_PARAMETERS,
339 DSA_IMEXPORTABLE_PUBLIC_KEY,
340 DSA_IMEXPORTABLE_PRIVATE_KEY,
341 OSSL_PARAM_END
342};
343
344static const OSSL_PARAM *dsa_gettable_params(void *provctx)
345{
346 return dsa_params;
347}
348
349static int dsa_validate_domparams(const DSA *dsa, int checktype)
350{
351 int status = 0;
352
353 return ossl_dsa_check_params(dsa, checktype, &status);
354}
355
356static int dsa_validate_public(const DSA *dsa)
357{
358 int status = 0;
359 const BIGNUM *pub_key = NULL;
360
361 DSA_get0_key(dsa, &pub_key, NULL);
362 if (pub_key == NULL)
363 return 0;
364 return ossl_dsa_check_pub_key(dsa, pub_key, &status);
365}
366
367static int dsa_validate_private(const DSA *dsa)
368{
369 int status = 0;
370 const BIGNUM *priv_key = NULL;
371
372 DSA_get0_key(dsa, NULL, &priv_key);
373 if (priv_key == NULL)
374 return 0;
375 return ossl_dsa_check_priv_key(dsa, priv_key, &status);
376}
377
378static int dsa_validate(const void *keydata, int selection, int checktype)
379{
380 const DSA *dsa = keydata;
381 int ok = 1;
382
383 if (!ossl_prov_is_running())
384 return 0;
385
386 if ((selection & DSA_POSSIBLE_SELECTIONS) == 0)
387 return 1; /* nothing to validate */
388
389 if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
390 ok = ok && dsa_validate_domparams(dsa, checktype);
391
392 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
393 ok = ok && dsa_validate_public(dsa);
394
395 if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
396 ok = ok && dsa_validate_private(dsa);
397
398 /* If the whole key is selected, we do a pairwise validation */
399 if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR)
400 == OSSL_KEYMGMT_SELECT_KEYPAIR)
401 ok = ok && ossl_dsa_check_pairwise(dsa);
402 return ok;
403}
404
405static void *dsa_gen_init(void *provctx, int selection,
406 const OSSL_PARAM params[])
407{
408 OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
409 struct dsa_gen_ctx *gctx = NULL;
410
411 if (!ossl_prov_is_running() || (selection & DSA_POSSIBLE_SELECTIONS) == 0)
412 return NULL;
413
414 if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) {
415 gctx->selection = selection;
416 gctx->libctx = libctx;
417 gctx->pbits = 2048;
418 gctx->qbits = 224;
419#ifdef FIPS_MODULE
420 gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_186_4;
421#else
422 gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_DEFAULT;
423#endif
424 gctx->gindex = -1;
425 gctx->pcounter = -1;
426 gctx->hindex = 0;
427 }
428 if (!dsa_gen_set_params(gctx, params)) {
429 OPENSSL_free(gctx);
430 gctx = NULL;
431 }
432 return gctx;
433}
434
435static int dsa_gen_set_template(void *genctx, void *templ)
436{
437 struct dsa_gen_ctx *gctx = genctx;
438 DSA *dsa = templ;
439
440 if (!ossl_prov_is_running() || gctx == NULL || dsa == NULL)
441 return 0;
442 gctx->ffc_params = ossl_dsa_get0_params(dsa);
443 return 1;
444}
445
446static int dsa_set_gen_seed(struct dsa_gen_ctx *gctx, unsigned char *seed,
447 size_t seedlen)
448{
449 OPENSSL_clear_free(gctx->seed, gctx->seedlen);
450 gctx->seed = NULL;
451 gctx->seedlen = 0;
452 if (seed != NULL && seedlen > 0) {
453 gctx->seed = OPENSSL_memdup(seed, seedlen);
454 if (gctx->seed == NULL)
455 return 0;
456 gctx->seedlen = seedlen;
457 }
458 return 1;
459}
460
461static int dsa_gen_set_params(void *genctx, const OSSL_PARAM params[])
462{
463 struct dsa_gen_ctx *gctx = genctx;
464 const OSSL_PARAM *p;
465
466 if (gctx == NULL)
467 return 0;
468 if (params == NULL)
469 return 1;
470
471
472 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_TYPE);
473 if (p != NULL) {
474 if (p->data_type != OSSL_PARAM_UTF8_STRING
475 || ((gctx->gen_type = dsa_gen_type_name2id(p->data)) == -1)) {
476 ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
477 return 0;
478 }
479 }
480 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_GINDEX);
481 if (p != NULL
482 && !OSSL_PARAM_get_int(p, &gctx->gindex))
483 return 0;
484 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PCOUNTER);
485 if (p != NULL
486 && !OSSL_PARAM_get_int(p, &gctx->pcounter))
487 return 0;
488 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_H);
489 if (p != NULL
490 && !OSSL_PARAM_get_int(p, &gctx->hindex))
491 return 0;
492 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_SEED);
493 if (p != NULL
494 && (p->data_type != OSSL_PARAM_OCTET_STRING
495 || !dsa_set_gen_seed(gctx, p->data, p->data_size)))
496 return 0;
497 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PBITS)) != NULL
498 && !OSSL_PARAM_get_size_t(p, &gctx->pbits))
499 return 0;
500 if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_QBITS)) != NULL
501 && !OSSL_PARAM_get_size_t(p, &gctx->qbits))
502 return 0;
503 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST);
504 if (p != NULL) {
505 if (p->data_type != OSSL_PARAM_UTF8_STRING)
506 return 0;
507 OPENSSL_free(gctx->mdname);
508 gctx->mdname = OPENSSL_strdup(p->data);
509 if (gctx->mdname == NULL)
510 return 0;
511 }
512 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST_PROPS);
513 if (p != NULL) {
514 if (p->data_type != OSSL_PARAM_UTF8_STRING)
515 return 0;
516 OPENSSL_free(gctx->mdprops);
517 gctx->mdprops = OPENSSL_strdup(p->data);
518 if (gctx->mdprops == NULL)
519 return 0;
520 }
521 return 1;
522}
523
524static const OSSL_PARAM *dsa_gen_settable_params(ossl_unused void *genctx,
525 ossl_unused void *provctx)
526{
527 static OSSL_PARAM settable[] = {
528 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE, NULL, 0),
529 OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_PBITS, NULL),
530 OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_QBITS, NULL),
531 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST, NULL, 0),
532 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST_PROPS, NULL, 0),
533 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL),
534 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0),
535 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL),
536 OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL),
537 OSSL_PARAM_END
538 };
539 return settable;
540}
541
542static int dsa_gencb(int p, int n, BN_GENCB *cb)
543{
544 struct dsa_gen_ctx *gctx = BN_GENCB_get_arg(cb);
545 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END };
546
547 params[0] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_POTENTIAL, &p);
548 params[1] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_ITERATION, &n);
549
550 return gctx->cb(params, gctx->cbarg);
551}
552
553static void *dsa_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
554{
555 struct dsa_gen_ctx *gctx = genctx;
556 DSA *dsa = NULL;
557 BN_GENCB *gencb = NULL;
558 int ret = 0;
559 FFC_PARAMS *ffc;
560
561 if (!ossl_prov_is_running() || gctx == NULL)
562 return NULL;
563 dsa = ossl_dsa_new(gctx->libctx);
564 if (dsa == NULL)
565 return NULL;
566
567 if (gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_DEFAULT)
568 gctx->gen_type = (gctx->pbits >= 2048 ? DSA_PARAMGEN_TYPE_FIPS_186_4 :
569 DSA_PARAMGEN_TYPE_FIPS_186_2);
570
571 gctx->cb = osslcb;
572 gctx->cbarg = cbarg;
573 gencb = BN_GENCB_new();
574 if (gencb != NULL)
575 BN_GENCB_set(gencb, dsa_gencb, genctx);
576
577 ffc = ossl_dsa_get0_params(dsa);
578 /* Copy the template value if one was passed */
579 if (gctx->ffc_params != NULL
580 && !ossl_ffc_params_copy(ffc, gctx->ffc_params))
581 goto end;
582
583 if (gctx->seed != NULL
584 && !ossl_ffc_params_set_seed(ffc, gctx->seed, gctx->seedlen))
585 goto end;
586 if (gctx->gindex != -1) {
587 ossl_ffc_params_set_gindex(ffc, gctx->gindex);
588 if (gctx->pcounter != -1)
589 ossl_ffc_params_set_pcounter(ffc, gctx->pcounter);
590 } else if (gctx->hindex != 0) {
591 ossl_ffc_params_set_h(ffc, gctx->hindex);
592 }
593 if (gctx->mdname != NULL) {
594 if (!ossl_ffc_set_digest(ffc, gctx->mdname, gctx->mdprops))
595 goto end;
596 }
597 if ((gctx->selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) {
598
599 if (ossl_dsa_generate_ffc_parameters(dsa, gctx->gen_type,
600 gctx->pbits, gctx->qbits,
601 gencb) <= 0)
602 goto end;
603 }
604 ossl_ffc_params_enable_flags(ffc, FFC_PARAM_FLAG_VALIDATE_LEGACY,
605 gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_186_2);
606 if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
607 if (ffc->p == NULL
608 || ffc->q == NULL
609 || ffc->g == NULL)
610 goto end;
611 if (DSA_generate_key(dsa) <= 0)
612 goto end;
613 }
614 ret = 1;
615end:
616 if (ret <= 0) {
617 DSA_free(dsa);
618 dsa = NULL;
619 }
620 BN_GENCB_free(gencb);
621 return dsa;
622}
623
624static void dsa_gen_cleanup(void *genctx)
625{
626 struct dsa_gen_ctx *gctx = genctx;
627
628 if (gctx == NULL)
629 return;
630
631 OPENSSL_free(gctx->mdname);
632 OPENSSL_free(gctx->mdprops);
633 OPENSSL_clear_free(gctx->seed, gctx->seedlen);
634 OPENSSL_free(gctx);
635}
636
637static void *dsa_load(const void *reference, size_t reference_sz)
638{
639 DSA *dsa = NULL;
640
641 if (ossl_prov_is_running() && reference_sz == sizeof(dsa)) {
642 /* The contents of the reference is the address to our object */
643 dsa = *(DSA **)reference;
644 /* We grabbed, so we detach it */
645 *(DSA **)reference = NULL;
646 return dsa;
647 }
648 return NULL;
649}
650
651static void *dsa_dup(const void *keydata_from, int selection)
652{
653 if (ossl_prov_is_running())
654 return ossl_dsa_dup(keydata_from, selection);
655 return NULL;
656}
657
658const OSSL_DISPATCH ossl_dsa_keymgmt_functions[] = {
659 { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dsa_newdata },
660 { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))dsa_gen_init },
661 { OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, (void (*)(void))dsa_gen_set_template },
662 { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))dsa_gen_set_params },
663 { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
664 (void (*)(void))dsa_gen_settable_params },
665 { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))dsa_gen },
666 { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))dsa_gen_cleanup },
667 { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))dsa_load },
668 { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dsa_freedata },
669 { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dsa_get_params },
670 { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dsa_gettable_params },
671 { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dsa_has },
672 { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))dsa_match },
673 { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))dsa_validate },
674 { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dsa_import },
675 { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dsa_import_types },
676 { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dsa_export },
677 { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dsa_export_types },
678 { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))dsa_dup },
679 { 0, NULL }
680};
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