dh_kmgmt.c@ 99507

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1	/*
2	* Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.
3	*
4	* Licensed under the Apache License 2.0 (the "License"). You may not use
5	* this file except in compliance with the License. You can obtain a copy
6	* in the file LICENSE in the source distribution or at
7	* https://www.openssl.org/source/license.html
8	*/
9
10	/*
11	* DH low level APIs are deprecated for public use, but still ok for
12	* internal use.
13	*/
14	#include "internal/deprecated.h"
15
16	#include <string.h> /* strcmp */
17	#include <openssl/core_dispatch.h>
18	#include <openssl/core_names.h>
19	#include <openssl/bn.h>
20	#include <openssl/err.h>
21	#include "prov/implementations.h"
22	#include "prov/providercommon.h"
23	#include "prov/provider_ctx.h"
24	#include "crypto/dh.h"
25	#include "internal/sizes.h"
26
27	static OSSL_FUNC_keymgmt_new_fn dh_newdata;
28	static OSSL_FUNC_keymgmt_free_fn dh_freedata;
29	static OSSL_FUNC_keymgmt_gen_init_fn dh_gen_init;
30	static OSSL_FUNC_keymgmt_gen_init_fn dhx_gen_init;
31	static OSSL_FUNC_keymgmt_gen_set_template_fn dh_gen_set_template;
32	static OSSL_FUNC_keymgmt_gen_set_params_fn dh_gen_set_params;
33	static OSSL_FUNC_keymgmt_gen_settable_params_fn dh_gen_settable_params;
34	static OSSL_FUNC_keymgmt_gen_fn dh_gen;
35	static OSSL_FUNC_keymgmt_gen_cleanup_fn dh_gen_cleanup;
36	static OSSL_FUNC_keymgmt_load_fn dh_load;
37	static OSSL_FUNC_keymgmt_get_params_fn dh_get_params;
38	static OSSL_FUNC_keymgmt_gettable_params_fn dh_gettable_params;
39	static OSSL_FUNC_keymgmt_set_params_fn dh_set_params;
40	static OSSL_FUNC_keymgmt_settable_params_fn dh_settable_params;
41	static OSSL_FUNC_keymgmt_has_fn dh_has;
42	static OSSL_FUNC_keymgmt_match_fn dh_match;
43	static OSSL_FUNC_keymgmt_validate_fn dh_validate;
44	static OSSL_FUNC_keymgmt_import_fn dh_import;
45	static OSSL_FUNC_keymgmt_import_types_fn dh_import_types;
46	static OSSL_FUNC_keymgmt_export_fn dh_export;
47	static OSSL_FUNC_keymgmt_export_types_fn dh_export_types;
48	static OSSL_FUNC_keymgmt_dup_fn dh_dup;
49
50	#define DH_POSSIBLE_SELECTIONS \
51	(OSSL_KEYMGMT_SELECT_KEYPAIR \| OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS)
52
53	struct dh_gen_ctx {
54	OSSL_LIB_CTX *libctx;
55
56	FFC_PARAMS *ffc_params;
57	int selection;
58	/* All these parameters are used for parameter generation only */
59	/* If there is a group name then the remaining parameters are not needed */
60	int group_nid;
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; /* see dhtype2id */
67	int generator; /* Used by DH_PARAMGEN_TYPE_GENERATOR in non fips mode only */
68	int pcounter;
69	int hindex;
70	int priv_len;
71
72	char *mdname;
73	char *mdprops;
74	OSSL_CALLBACK *cb;
75	void *cbarg;
76	int dh_type;
77	};
78
79	static int dh_gen_type_name2id_w_default(const char *name, int type)
80	{
81	if (strcmp(name, "default") == 0) {
82	#ifdef FIPS_MODULE
83	if (type == DH_FLAG_TYPE_DHX)
84	return DH_PARAMGEN_TYPE_FIPS_186_4;
85
86	return DH_PARAMGEN_TYPE_GROUP;
87	#else
88	if (type == DH_FLAG_TYPE_DHX)
89	return DH_PARAMGEN_TYPE_FIPS_186_2;
90
91	return DH_PARAMGEN_TYPE_GENERATOR;
92	#endif
93	}
94
95	return ossl_dh_gen_type_name2id(name, type);
96	}
97
98	static void dh_newdata(void provctx)
99	{
100	DH *dh = NULL;
101
102	if (ossl_prov_is_running()) {
103	dh = ossl_dh_new_ex(PROV_LIBCTX_OF(provctx));
104	if (dh != NULL) {
105	DH_clear_flags(dh, DH_FLAG_TYPE_MASK);
106	DH_set_flags(dh, DH_FLAG_TYPE_DH);
107	}
108	}
109	return dh;
110	}
111
112	static void dhx_newdata(void provctx)
113	{
114	DH *dh = NULL;
115
116	dh = ossl_dh_new_ex(PROV_LIBCTX_OF(provctx));
117	if (dh != NULL) {
118	DH_clear_flags(dh, DH_FLAG_TYPE_MASK);
119	DH_set_flags(dh, DH_FLAG_TYPE_DHX);
120	}
121	return dh;
122	}
123
124	static void dh_freedata(void *keydata)
125	{
126	DH_free(keydata);
127	}
128
129	static int dh_has(const void *keydata, int selection)
130	{
131	const DH *dh = keydata;
132	int ok = 1;
133
134	if (!ossl_prov_is_running() \|\| dh == NULL)
135	return 0;
136	if ((selection & DH_POSSIBLE_SELECTIONS) == 0)
137	return 1; /* the selection is not missing */
138
139	if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
140	ok = ok && (DH_get0_pub_key(dh) != NULL);
141	if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
142	ok = ok && (DH_get0_priv_key(dh) != NULL);
143	if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
144	ok = ok && (DH_get0_p(dh) != NULL && DH_get0_g(dh) != NULL);
145	return ok;
146	}
147
148	static int dh_match(const void keydata1, const void keydata2, int selection)
149	{
150	const DH *dh1 = keydata1;
151	const DH *dh2 = keydata2;
152	int ok = 1;
153
154	if (!ossl_prov_is_running())
155	return 0;
156
157	if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
158	int key_checked = 0;
159
160	if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) {
161	const BIGNUM *pa = DH_get0_pub_key(dh1);
162	const BIGNUM *pb = DH_get0_pub_key(dh2);
163
164	if (pa != NULL && pb != NULL) {
165	ok = ok && BN_cmp(pa, pb) == 0;
166	key_checked = 1;
167	}
168	}
169	if (!key_checked
170	&& (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
171	const BIGNUM *pa = DH_get0_priv_key(dh1);
172	const BIGNUM *pb = DH_get0_priv_key(dh2);
173
174	if (pa != NULL && pb != NULL) {
175	ok = ok && BN_cmp(pa, pb) == 0;
176	key_checked = 1;
177	}
178	}
179	ok = ok && key_checked;
180	}
181	if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) {
182	FFC_PARAMS dhparams1 = ossl_dh_get0_params((DH )dh1);
183	FFC_PARAMS dhparams2 = ossl_dh_get0_params((DH )dh2);
184
185	ok = ok && ossl_ffc_params_cmp(dhparams1, dhparams2, 1);
186	}
187	return ok;
188	}
189
190	static int dh_import(void *keydata, int selection, const OSSL_PARAM params[])
191	{
192	DH *dh = keydata;
193	int ok = 1;
194
195	if (!ossl_prov_is_running() \|\| dh == NULL)
196	return 0;
197
198	if ((selection & DH_POSSIBLE_SELECTIONS) == 0)
199	return 0;
200
201	if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
202	ok = ok && ossl_dh_params_fromdata(dh, params);
203
204	if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
205	int include_private =
206	selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
207
208	ok = ok && ossl_dh_key_fromdata(dh, params, include_private);
209	}
210
211	return ok;
212	}
213
214	static int dh_export(void keydata, int selection, OSSL_CALLBACK param_cb,
215	void *cbarg)
216	{
217	DH *dh = keydata;
218	OSSL_PARAM_BLD *tmpl = NULL;
219	OSSL_PARAM *params = NULL;
220	int ok = 1;
221
222	if (!ossl_prov_is_running() \|\| dh == NULL)
223	return 0;
224
225	tmpl = OSSL_PARAM_BLD_new();
226	if (tmpl == NULL)
227	return 0;
228
229	if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
230	ok = ok && ossl_dh_params_todata(dh, tmpl, NULL);
231
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 && ossl_dh_key_todata(dh, 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 DH_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_int(OSSL_PKEY_PARAM_DH_PRIV_LEN, NULL), \
262	OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0), \
263	OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME, NULL, 0)
264	# define DH_IMEXPORTABLE_PUBLIC_KEY \
265	OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0)
266	# define DH_IMEXPORTABLE_PRIVATE_KEY \
267	OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0)
268	static const OSSL_PARAM dh_all_types[] = {
269	DH_IMEXPORTABLE_PARAMETERS,
270	DH_IMEXPORTABLE_PUBLIC_KEY,
271	DH_IMEXPORTABLE_PRIVATE_KEY,
272	OSSL_PARAM_END
273	};
274	static const OSSL_PARAM dh_parameter_types[] = {
275	DH_IMEXPORTABLE_PARAMETERS,
276	OSSL_PARAM_END
277	};
278	static const OSSL_PARAM dh_key_types[] = {
279	DH_IMEXPORTABLE_PUBLIC_KEY,
280	DH_IMEXPORTABLE_PRIVATE_KEY,
281	OSSL_PARAM_END
282	};
283	static const OSSL_PARAM *dh_types[] = {
284	NULL, /* Index 0 = none of them */
285	dh_parameter_types, /* Index 1 = parameter types */
286	dh_key_types, /* Index 2 = key types */
287	dh_all_types /* Index 3 = 1 + 2 */
288	};
289
290	static const OSSL_PARAM *dh_imexport_types(int selection)
291	{
292	int type_select = 0;
293
294	if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
295	type_select += 1;
296	if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
297	type_select += 2;
298	return dh_types[type_select];
299	}
300
301	static const OSSL_PARAM *dh_import_types(int selection)
302	{
303	return dh_imexport_types(selection);
304	}
305
306	static const OSSL_PARAM *dh_export_types(int selection)
307	{
308	return dh_imexport_types(selection);
309	}
310
311	static ossl_inline int dh_get_params(void *key, OSSL_PARAM params[])
312	{
313	DH *dh = key;
314	OSSL_PARAM *p;
315
316	if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
317	&& !OSSL_PARAM_set_int(p, DH_bits(dh)))
318	return 0;
319	if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
320	&& !OSSL_PARAM_set_int(p, DH_security_bits(dh)))
321	return 0;
322	if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
323	&& !OSSL_PARAM_set_int(p, DH_size(dh)))
324	return 0;
325	if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY)) != NULL) {
326	if (p->data_type != OSSL_PARAM_OCTET_STRING)
327	return 0;
328	p->return_size = ossl_dh_key2buf(dh, (unsigned char **)&p->data,
329	p->data_size, 0);
330	if (p->return_size == 0)
331	return 0;
332	}
333
334	return ossl_dh_params_todata(dh, NULL, params)
335	&& ossl_dh_key_todata(dh, NULL, params, 1);
336	}
337
338	static const OSSL_PARAM dh_params[] = {
339	OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
340	OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
341	OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
342	OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY, NULL, 0),
343	DH_IMEXPORTABLE_PARAMETERS,
344	DH_IMEXPORTABLE_PUBLIC_KEY,
345	DH_IMEXPORTABLE_PRIVATE_KEY,
346	OSSL_PARAM_END
347	};
348
349	static const OSSL_PARAM dh_gettable_params(void provctx)
350	{
351	return dh_params;
352	}
353
354	static const OSSL_PARAM dh_known_settable_params[] = {
355	OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY, NULL, 0),
356	OSSL_PARAM_END
357	};
358
359	static const OSSL_PARAM dh_settable_params(void provctx)
360	{
361	return dh_known_settable_params;
362	}
363
364	static int dh_set_params(void *key, const OSSL_PARAM params[])
365	{
366	DH *dh = key;
367	const OSSL_PARAM *p;
368
369	p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY);
370	if (p != NULL
371	&& (p->data_type != OSSL_PARAM_OCTET_STRING
372	\|\| !ossl_dh_buf2key(dh, p->data, p->data_size)))
373	return 0;
374
375	return 1;
376	}
377
378	static int dh_validate_public(const DH *dh, int checktype)
379	{
380	const BIGNUM *pub_key = NULL;
381	int res = 0;
382
383	DH_get0_key(dh, &pub_key, NULL);
384	if (pub_key == NULL)
385	return 0;
386
387	/* The partial test is only valid for named group's with q = (p - 1) / 2 */
388	if (checktype == OSSL_KEYMGMT_VALIDATE_QUICK_CHECK
389	&& ossl_dh_is_named_safe_prime_group(dh))
390	return ossl_dh_check_pub_key_partial(dh, pub_key, &res);
391
392	return DH_check_pub_key(dh, pub_key, &res);
393	}
394
395	static int dh_validate_private(const DH *dh)
396	{
397	int status = 0;
398	const BIGNUM *priv_key = NULL;
399
400	DH_get0_key(dh, NULL, &priv_key);
401	if (priv_key == NULL)
402	return 0;
403	return ossl_dh_check_priv_key(dh, priv_key, &status);;
404	}
405
406	static int dh_validate(const void *keydata, int selection, int checktype)
407	{
408	const DH *dh = keydata;
409	int ok = 1;
410
411	if (!ossl_prov_is_running())
412	return 0;
413
414	if ((selection & DH_POSSIBLE_SELECTIONS) == 0)
415	return 1; /* nothing to validate */
416
417	if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) {
418	/*
419	* Both of these functions check parameters. DH_check_params_ex()
420	* performs a lightweight check (e.g. it does not check that p is a
421	* safe prime)
422	*/
423	if (checktype == OSSL_KEYMGMT_VALIDATE_QUICK_CHECK)
424	ok = ok && DH_check_params_ex(dh);
425	else
426	ok = ok && DH_check_ex(dh);
427	}
428
429	if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
430	ok = ok && dh_validate_public(dh, checktype);
431
432	if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
433	ok = ok && dh_validate_private(dh);
434
435	if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR)
436	== OSSL_KEYMGMT_SELECT_KEYPAIR)
437	ok = ok && ossl_dh_check_pairwise(dh);
438	return ok;
439	}
440
441	static void dh_gen_init_base(void provctx, int selection,
442	const OSSL_PARAM params[], int type)
443	{
444	OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx);
445	struct dh_gen_ctx *gctx = NULL;
446
447	if (!ossl_prov_is_running())
448	return NULL;
449
450	if ((selection & (OSSL_KEYMGMT_SELECT_KEYPAIR
451	\| OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS)) == 0)
452	return NULL;
453
454	if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) {
455	gctx->selection = selection;
456	gctx->libctx = libctx;
457	gctx->pbits = 2048;
458	gctx->qbits = 224;
459	gctx->mdname = NULL;
460	#ifdef FIPS_MODULE
461	gctx->gen_type = (type == DH_FLAG_TYPE_DHX)
462	? DH_PARAMGEN_TYPE_FIPS_186_4
463	: DH_PARAMGEN_TYPE_GROUP;
464	#else
465	gctx->gen_type = (type == DH_FLAG_TYPE_DHX)
466	? DH_PARAMGEN_TYPE_FIPS_186_2
467	: DH_PARAMGEN_TYPE_GENERATOR;
468	#endif
469	gctx->gindex = -1;
470	gctx->hindex = 0;
471	gctx->pcounter = -1;
472	gctx->generator = DH_GENERATOR_2;
473	gctx->dh_type = type;
474	}
475	if (!dh_gen_set_params(gctx, params)) {
476	OPENSSL_free(gctx);
477	gctx = NULL;
478	}
479	return gctx;
480	}
481
482	static void dh_gen_init(void provctx, int selection,
483	const OSSL_PARAM params[])
484	{
485	return dh_gen_init_base(provctx, selection, params, DH_FLAG_TYPE_DH);
486	}
487
488	static void dhx_gen_init(void provctx, int selection,
489	const OSSL_PARAM params[])
490	{
491	return dh_gen_init_base(provctx, selection, params, DH_FLAG_TYPE_DHX);
492	}
493
494	static int dh_gen_set_template(void genctx, void templ)
495	{
496	struct dh_gen_ctx *gctx = genctx;
497	DH *dh = templ;
498
499	if (!ossl_prov_is_running() \|\| gctx == NULL \|\| dh == NULL)
500	return 0;
501	gctx->ffc_params = ossl_dh_get0_params(dh);
502	return 1;
503	}
504
505	static int dh_set_gen_seed(struct dh_gen_ctx gctx, unsigned char seed,
506	size_t seedlen)
507	{
508	OPENSSL_clear_free(gctx->seed, gctx->seedlen);
509	gctx->seed = NULL;
510	gctx->seedlen = 0;
511	if (seed != NULL && seedlen > 0) {
512	gctx->seed = OPENSSL_memdup(seed, seedlen);
513	if (gctx->seed == NULL)
514	return 0;
515	gctx->seedlen = seedlen;
516	}
517	return 1;
518	}
519
520	static int dh_gen_common_set_params(void *genctx, const OSSL_PARAM params[])
521	{
522	struct dh_gen_ctx *gctx = genctx;
523	const OSSL_PARAM *p;
524
525	if (gctx == NULL)
526	return 0;
527	if (params == NULL)
528	return 1;
529
530	p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_TYPE);
531	if (p != NULL) {
532	if (p->data_type != OSSL_PARAM_UTF8_STRING
533	\|\| ((gctx->gen_type =
534	dh_gen_type_name2id_w_default(p->data, gctx->dh_type)) == -1)) {
535	ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
536	return 0;
537	}
538	}
539	p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_GROUP_NAME);
540	if (p != NULL) {
541	const DH_NAMED_GROUP *group = NULL;
542
543	if (p->data_type != OSSL_PARAM_UTF8_STRING
544	\|\| p->data == NULL
545	\|\| (group = ossl_ffc_name_to_dh_named_group(p->data)) == NULL
546	\|\| ((gctx->group_nid =
547	ossl_ffc_named_group_get_uid(group)) == NID_undef)) {
548	ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
549	return 0;
550	}
551	}
552	if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PBITS)) != NULL
553	&& !OSSL_PARAM_get_size_t(p, &gctx->pbits))
554	return 0;
555	p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DH_PRIV_LEN);
556	if (p != NULL && !OSSL_PARAM_get_int(p, &gctx->priv_len))
557	return 0;
558	return 1;
559	}
560
561	static const OSSL_PARAM dh_gen_settable_params(ossl_unused void genctx,
562	ossl_unused void *provctx)
563	{
564	static const OSSL_PARAM dh_gen_settable[] = {
565	OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE, NULL, 0),
566	OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME, NULL, 0),
567	OSSL_PARAM_int(OSSL_PKEY_PARAM_DH_PRIV_LEN, NULL),
568	OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_PBITS, NULL),
569	OSSL_PARAM_int(OSSL_PKEY_PARAM_DH_GENERATOR, NULL),
570	OSSL_PARAM_END
571	};
572	return dh_gen_settable;
573	}
574
575	static const OSSL_PARAM dhx_gen_settable_params(ossl_unused void genctx,
576	ossl_unused void *provctx)
577	{
578	static const OSSL_PARAM dhx_gen_settable[] = {
579	OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE, NULL, 0),
580	OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME, NULL, 0),
581	OSSL_PARAM_int(OSSL_PKEY_PARAM_DH_PRIV_LEN, NULL),
582	OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_PBITS, NULL),
583	OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_QBITS, NULL),
584	OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST, NULL, 0),
585	OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST_PROPS, NULL, 0),
586	OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL),
587	OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0),
588	OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL),
589	OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL),
590	OSSL_PARAM_END
591	};
592	return dhx_gen_settable;
593	}
594
595	static int dhx_gen_set_params(void *genctx, const OSSL_PARAM params[])
596	{
597	struct dh_gen_ctx *gctx = genctx;
598	const OSSL_PARAM *p;
599
600	if (!dh_gen_common_set_params(genctx, params))
601	return 0;
602
603	/* Parameters related to fips186-4 and fips186-2 */
604	p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_GINDEX);
605	if (p != NULL && !OSSL_PARAM_get_int(p, &gctx->gindex))
606	return 0;
607	p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PCOUNTER);
608	if (p != NULL && !OSSL_PARAM_get_int(p, &gctx->pcounter))
609	return 0;
610	p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_H);
611	if (p != NULL && !OSSL_PARAM_get_int(p, &gctx->hindex))
612	return 0;
613	p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_SEED);
614	if (p != NULL
615	&& (p->data_type != OSSL_PARAM_OCTET_STRING
616	\|\| !dh_set_gen_seed(gctx, p->data, p->data_size)))
617	return 0;
618	if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_QBITS)) != NULL
619	&& !OSSL_PARAM_get_size_t(p, &gctx->qbits))
620	return 0;
621	p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST);
622	if (p != NULL) {
623	if (p->data_type != OSSL_PARAM_UTF8_STRING)
624	return 0;
625	OPENSSL_free(gctx->mdname);
626	gctx->mdname = OPENSSL_strdup(p->data);
627	if (gctx->mdname == NULL)
628	return 0;
629	}
630	p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST_PROPS);
631	if (p != NULL) {
632	if (p->data_type != OSSL_PARAM_UTF8_STRING)
633	return 0;
634	OPENSSL_free(gctx->mdprops);
635	gctx->mdprops = OPENSSL_strdup(p->data);
636	if (gctx->mdprops == NULL)
637	return 0;
638	}
639
640	/* Parameters that are not allowed for DHX */
641	p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DH_GENERATOR);
642	if (p != NULL) {
643	ERR_raise(ERR_LIB_PROV, ERR_R_UNSUPPORTED);
644	return 0;
645	}
646	return 1;
647	}
648
649	static int dh_gen_set_params(void *genctx, const OSSL_PARAM params[])
650	{
651	struct dh_gen_ctx *gctx = genctx;
652	const OSSL_PARAM *p;
653
654	if (!dh_gen_common_set_params(genctx, params))
655	return 0;
656
657	p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DH_GENERATOR);
658	if (p != NULL && !OSSL_PARAM_get_int(p, &gctx->generator))
659	return 0;
660
661	/* Parameters that are not allowed for DH */
662	if (OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_GINDEX) != NULL
663	\|\| OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PCOUNTER) != NULL
664	\|\| OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_H) != NULL
665	\|\| OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_SEED) != NULL
666	\|\| OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_QBITS) != NULL
667	\|\| OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST) != NULL
668	\|\| OSSL_PARAM_locate_const(params,
669	OSSL_PKEY_PARAM_FFC_DIGEST_PROPS) != NULL) {
670	ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
671	return 0;
672	}
673	return 1;
674	}
675
676	static int dh_gencb(int p, int n, BN_GENCB *cb)
677	{
678	struct dh_gen_ctx *gctx = BN_GENCB_get_arg(cb);
679	OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END };
680
681	params[0] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_POTENTIAL, &p);
682	params[1] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_ITERATION, &n);
683
684	return gctx->cb(params, gctx->cbarg);
685	}
686
687	static void dh_gen(void genctx, OSSL_CALLBACK osslcb, void cbarg)
688	{
689	int ret = 0;
690	struct dh_gen_ctx *gctx = genctx;
691	DH *dh = NULL;
692	BN_GENCB *gencb = NULL;
693	FFC_PARAMS *ffc;
694
695	if (!ossl_prov_is_running() \|\| gctx == NULL)
696	return NULL;
697
698	/*
699	* If a group name is selected then the type is group regardless of what the
700	* the user selected. This overrides rather than errors for backwards
701	* compatibility.
702	*/
703	if (gctx->group_nid != NID_undef)
704	gctx->gen_type = DH_PARAMGEN_TYPE_GROUP;
705
706	/* For parameter generation - If there is a group name just create it */
707	if (gctx->gen_type == DH_PARAMGEN_TYPE_GROUP
708	&& gctx->ffc_params == NULL) {
709	/* Select a named group if there is not one already */
710	if (gctx->group_nid == NID_undef)
711	gctx->group_nid = ossl_dh_get_named_group_uid_from_size(gctx->pbits);
712	if (gctx->group_nid == NID_undef)
713	return NULL;
714	dh = ossl_dh_new_by_nid_ex(gctx->libctx, gctx->group_nid);
715	if (dh == NULL)
716	return NULL;
717	ffc = ossl_dh_get0_params(dh);
718	} else {
719	dh = ossl_dh_new_ex(gctx->libctx);
720	if (dh == NULL)
721	return NULL;
722	ffc = ossl_dh_get0_params(dh);
723
724	/* Copy the template value if one was passed */
725	if (gctx->ffc_params != NULL
726	&& !ossl_ffc_params_copy(ffc, gctx->ffc_params))
727	goto end;
728
729	if (!ossl_ffc_params_set_seed(ffc, gctx->seed, gctx->seedlen))
730	goto end;
731	if (gctx->gindex != -1) {
732	ossl_ffc_params_set_gindex(ffc, gctx->gindex);
733	if (gctx->pcounter != -1)
734	ossl_ffc_params_set_pcounter(ffc, gctx->pcounter);
735	} else if (gctx->hindex != 0) {
736	ossl_ffc_params_set_h(ffc, gctx->hindex);
737	}
738	if (gctx->mdname != NULL) {
739	if (!ossl_ffc_set_digest(ffc, gctx->mdname, gctx->mdprops))
740	goto end;
741	}
742	gctx->cb = osslcb;
743	gctx->cbarg = cbarg;
744	gencb = BN_GENCB_new();
745	if (gencb != NULL)
746	BN_GENCB_set(gencb, dh_gencb, genctx);
747
748	if ((gctx->selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) {
749	/*
750	* NOTE: The old safe prime generator code is not used in fips mode,
751	* (i.e internally it ignores the generator and chooses a named
752	* group based on pbits.
753	*/
754	if (gctx->gen_type == DH_PARAMGEN_TYPE_GENERATOR)
755	ret = DH_generate_parameters_ex(dh, gctx->pbits,
756	gctx->generator, gencb);
757	else
758	ret = ossl_dh_generate_ffc_parameters(dh, gctx->gen_type,
759	gctx->pbits, gctx->qbits,
760	gencb);
761	if (ret <= 0)
762	goto end;
763	}
764	}
765
766	if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
767	if (ffc->p == NULL \|\| ffc->g == NULL)
768	goto end;
769	if (gctx->priv_len > 0)
770	DH_set_length(dh, (long)gctx->priv_len);
771	ossl_ffc_params_enable_flags(ffc, FFC_PARAM_FLAG_VALIDATE_LEGACY,
772	gctx->gen_type == DH_PARAMGEN_TYPE_FIPS_186_2);
773	if (DH_generate_key(dh) <= 0)
774	goto end;
775	}
776	DH_clear_flags(dh, DH_FLAG_TYPE_MASK);
777	DH_set_flags(dh, gctx->dh_type);
778
779	ret = 1;
780	end:
781	if (ret <= 0) {
782	DH_free(dh);
783	dh = NULL;
784	}
785	BN_GENCB_free(gencb);
786	return dh;
787	}
788
789	static void dh_gen_cleanup(void *genctx)
790	{
791	struct dh_gen_ctx *gctx = genctx;
792
793	if (gctx == NULL)
794	return;
795
796	OPENSSL_free(gctx->mdname);
797	OPENSSL_free(gctx->mdprops);
798	OPENSSL_clear_free(gctx->seed, gctx->seedlen);
799	OPENSSL_free(gctx);
800	}
801
802	static void dh_load(const void reference, size_t reference_sz)
803	{
804	DH *dh = NULL;
805
806	if (ossl_prov_is_running() && reference_sz == sizeof(dh)) {
807	/* The contents of the reference is the address to our object */
808	dh = (DH *)reference;
809	/* We grabbed, so we detach it */
810	(DH *)reference = NULL;
811	return dh;
812	}
813	return NULL;
814	}
815
816	static void dh_dup(const void keydata_from, int selection)
817	{
818	if (ossl_prov_is_running())
819	return ossl_dh_dup(keydata_from, selection);
820	return NULL;
821	}
822
823	const OSSL_DISPATCH ossl_dh_keymgmt_functions[] = {
824	{ OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dh_newdata },
825	{ OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))dh_gen_init },
826	{ OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, (void (*)(void))dh_gen_set_template },
827	{ OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))dh_gen_set_params },
828	{ OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
829	(void (*)(void))dh_gen_settable_params },
830	{ OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))dh_gen },
831	{ OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))dh_gen_cleanup },
832	{ OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))dh_load },
833	{ OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dh_freedata },
834	{ OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dh_get_params },
835	{ OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dh_gettable_params },
836	{ OSSL_FUNC_KEYMGMT_SET_PARAMS, (void (*) (void))dh_set_params },
837	{ OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*) (void))dh_settable_params },
838	{ OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dh_has },
839	{ OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))dh_match },
840	{ OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))dh_validate },
841	{ OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dh_import },
842	{ OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dh_import_types },
843	{ OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dh_export },
844	{ OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dh_export_types },
845	{ OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))dh_dup },
846	{ 0, NULL }
847	};
848
849	/* For any DH key, we use the "DH" algorithms regardless of sub-type. */
850	static const char *dhx_query_operation_name(int operation_id)
851	{
852	return "DH";
853	}
854
855	const OSSL_DISPATCH ossl_dhx_keymgmt_functions[] = {
856	{ OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dhx_newdata },
857	{ OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))dhx_gen_init },
858	{ OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, (void (*)(void))dh_gen_set_template },
859	{ OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))dhx_gen_set_params },
860	{ OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
861	(void (*)(void))dhx_gen_settable_params },
862	{ OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))dh_gen },
863	{ OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))dh_gen_cleanup },
864	{ OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))dh_load },
865	{ OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dh_freedata },
866	{ OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dh_get_params },
867	{ OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dh_gettable_params },
868	{ OSSL_FUNC_KEYMGMT_SET_PARAMS, (void (*) (void))dh_set_params },
869	{ OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*) (void))dh_settable_params },
870	{ OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dh_has },
871	{ OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))dh_match },
872	{ OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))dh_validate },
873	{ OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dh_import },
874	{ OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dh_import_types },
875	{ OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dh_export },
876	{ OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dh_export_types },
877	{ OSSL_FUNC_KEYMGMT_QUERY_OPERATION_NAME,
878	(void (*)(void))dhx_query_operation_name },
879	{ OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))dh_dup },
880	{ 0, NULL }
881	};

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source: vbox/trunk/src/libs/openssl-3.0.7/providers/implementations/keymgmt/dh_kmgmt.c@ 99507

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