ec_asn1.c@ 88461

Last change on this file since 88461 was 87984, checked in by vboxsync, 4 years ago
openssl-1.1.1j: Applied and adjusted our OpenSSL changes to 1.1.1j. bugref:9963
File size: 39.3 KB

Line
1	/*
2	* Copyright 2002-2020 The OpenSSL Project Authors. All Rights Reserved.
3	*
4	* Licensed under the OpenSSL license (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	#include <string.h>
11	#include "ec_local.h"
12	#include <openssl/err.h>
13	#include <openssl/asn1t.h>
14	#include <openssl/objects.h>
15	#include "internal/nelem.h"
16
17	int EC_GROUP_get_basis_type(const EC_GROUP *group)
18	{
19	int i;
20
21	if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
22	NID_X9_62_characteristic_two_field)
23	/* everything else is currently not supported */
24	return 0;
25
26	/* Find the last non-zero element of group->poly[] */
27	for (i = 0;
28	i < (int)OSSL_NELEM(group->poly) && group->poly[i] != 0;
29	i++)
30	continue;
31
32	if (i == 4)
33	return NID_X9_62_ppBasis;
34	else if (i == 2)
35	return NID_X9_62_tpBasis;
36	else
37	/* everything else is currently not supported */
38	return 0;
39	}
40
41	#ifndef OPENSSL_NO_EC2M
42	int EC_GROUP_get_trinomial_basis(const EC_GROUP group, unsigned int k)
43	{
44	if (group == NULL)
45	return 0;
46
47	if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
48	NID_X9_62_characteristic_two_field
49	\|\| !((group->poly[0] != 0) && (group->poly[1] != 0)
50	&& (group->poly[2] == 0))) {
51	ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS,
52	ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
53	return 0;
54	}
55
56	if (k)
57	*k = group->poly[1];
58
59	return 1;
60	}
61
62	int EC_GROUP_get_pentanomial_basis(const EC_GROUP group, unsigned int k1,
63	unsigned int k2, unsigned int k3)
64	{
65	if (group == NULL)
66	return 0;
67
68	if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
69	NID_X9_62_characteristic_two_field
70	\|\| !((group->poly[0] != 0) && (group->poly[1] != 0)
71	&& (group->poly[2] != 0) && (group->poly[3] != 0)
72	&& (group->poly[4] == 0))) {
73	ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS,
74	ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
75	return 0;
76	}
77
78	if (k1)
79	*k1 = group->poly[3];
80	if (k2)
81	*k2 = group->poly[2];
82	if (k3)
83	*k3 = group->poly[1];
84
85	return 1;
86	}
87	#endif
88
89	/* some structures needed for the asn1 encoding */
90	typedef struct x9_62_pentanomial_st {
91	int32_t k1;
92	int32_t k2;
93	int32_t k3;
94	} X9_62_PENTANOMIAL;
95
96	typedef struct x9_62_characteristic_two_st {
97	int32_t m;
98	ASN1_OBJECT *type;
99	union {
100	char *ptr;
101	/* NID_X9_62_onBasis */
102	ASN1_NULL *onBasis;
103	/* NID_X9_62_tpBasis */
104	ASN1_INTEGER *tpBasis;
105	/* NID_X9_62_ppBasis */
106	X9_62_PENTANOMIAL *ppBasis;
107	/* anything else */
108	ASN1_TYPE *other;
109	} p;
110	} X9_62_CHARACTERISTIC_TWO;
111
112	typedef struct x9_62_fieldid_st {
113	ASN1_OBJECT *fieldType;
114	union {
115	char *ptr;
116	/* NID_X9_62_prime_field */
117	ASN1_INTEGER *prime;
118	/* NID_X9_62_characteristic_two_field */
119	X9_62_CHARACTERISTIC_TWO *char_two;
120	/* anything else */
121	ASN1_TYPE *other;
122	} p;
123	} X9_62_FIELDID;
124
125	typedef struct x9_62_curve_st {
126	ASN1_OCTET_STRING *a;
127	ASN1_OCTET_STRING *b;
128	ASN1_BIT_STRING *seed;
129	} X9_62_CURVE;
130
131	struct ec_parameters_st {
132	int32_t version;
133	X9_62_FIELDID *fieldID;
134	X9_62_CURVE *curve;
135	ASN1_OCTET_STRING *base;
136	ASN1_INTEGER *order;
137	ASN1_INTEGER *cofactor;
138	} /* ECPARAMETERS */ ;
139
140	typedef enum {
141	ECPKPARAMETERS_TYPE_NAMED = 0,
142	ECPKPARAMETERS_TYPE_EXPLICIT,
143	ECPKPARAMETERS_TYPE_IMPLICIT
144	} ecpk_parameters_type_t;
145
146	struct ecpk_parameters_st {
147	int type;
148	union {
149	ASN1_OBJECT *named_curve;
150	ECPARAMETERS *parameters;
151	ASN1_NULL *implicitlyCA;
152	} value;
153	} /* ECPKPARAMETERS */ ;
154
155	/* SEC1 ECPrivateKey */
156	typedef struct ec_privatekey_st {
157	int32_t version;
158	ASN1_OCTET_STRING *privateKey;
159	ECPKPARAMETERS *parameters;
160	ASN1_BIT_STRING *publicKey;
161	} EC_PRIVATEKEY;
162
163	/* the OpenSSL ASN.1 definitions */
164	ASN1_SEQUENCE(X9_62_PENTANOMIAL) = {
165	ASN1_EMBED(X9_62_PENTANOMIAL, k1, INT32),
166	ASN1_EMBED(X9_62_PENTANOMIAL, k2, INT32),
167	ASN1_EMBED(X9_62_PENTANOMIAL, k3, INT32)
168	} static_ASN1_SEQUENCE_END(X9_62_PENTANOMIAL)
169
170	DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
171	IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
172
173	ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY);
174
175	ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = {
176	ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)),
177	ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)),
178	ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL))
179	} ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL);
180
181	ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = {
182	ASN1_EMBED(X9_62_CHARACTERISTIC_TWO, m, INT32),
183	ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT),
184	ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO)
185	} static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO)
186
187	DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
188	IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
189
190	ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY);
191
192	ASN1_ADB(X9_62_FIELDID) = {
193	ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)),
194	ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO))
195	} ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL);
196
197	ASN1_SEQUENCE(X9_62_FIELDID) = {
198	ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
199	ASN1_ADB_OBJECT(X9_62_FIELDID)
200	} static_ASN1_SEQUENCE_END(X9_62_FIELDID)
201
202	ASN1_SEQUENCE(X9_62_CURVE) = {
203	ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING),
204	ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING),
205	ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING)
206	} static_ASN1_SEQUENCE_END(X9_62_CURVE)
207
208	ASN1_SEQUENCE(ECPARAMETERS) = {
209	ASN1_EMBED(ECPARAMETERS, version, INT32),
210	ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID),
211	ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE),
212	ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING),
213	ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER),
214	ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER)
215	} ASN1_SEQUENCE_END(ECPARAMETERS)
216
217	DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
218	IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
219
220	ASN1_CHOICE(ECPKPARAMETERS) = {
221	ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT),
222	ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS),
223	ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL)
224	} ASN1_CHOICE_END(ECPKPARAMETERS)
225
226	DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
227	DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS)
228	IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
229
230	ASN1_SEQUENCE(EC_PRIVATEKEY) = {
231	ASN1_EMBED(EC_PRIVATEKEY, version, INT32),
232	ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING),
233	ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0),
234	ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1)
235	} static_ASN1_SEQUENCE_END(EC_PRIVATEKEY)
236
237	DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
238	DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY)
239	IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
240
241	/* some declarations of internal function */
242
243	/* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */
244	static int ec_asn1_group2fieldid(const EC_GROUP , X9_62_FIELDID );
245	/* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */
246	static int ec_asn1_group2curve(const EC_GROUP , X9_62_CURVE );
247
248	/* the function definitions */
249
250	static int ec_asn1_group2fieldid(const EC_GROUP group, X9_62_FIELDID field)
251	{
252	int ok = 0, nid;
253	BIGNUM *tmp = NULL;
254
255	if (group == NULL \|\| field == NULL)
256	return 0;
257
258	/* clear the old values (if necessary) */
259	ASN1_OBJECT_free(field->fieldType);
260	ASN1_TYPE_free(field->p.other);
261
262	nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
263	/* set OID for the field */
264	if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) {
265	ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
266	goto err;
267	}
268
269	if (nid == NID_X9_62_prime_field) {
270	if ((tmp = BN_new()) == NULL) {
271	ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
272	goto err;
273	}
274	/* the parameters are specified by the prime number p */
275	if (!EC_GROUP_get_curve(group, tmp, NULL, NULL, NULL)) {
276	ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
277	goto err;
278	}
279	/* set the prime number */
280	field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL);
281	if (field->p.prime == NULL) {
282	ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
283	goto err;
284	}
285	} else if (nid == NID_X9_62_characteristic_two_field)
286	#ifdef OPENSSL_NO_EC2M
287	{
288	ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED);
289	goto err;
290	}
291	#else
292	{
293	int field_type;
294	X9_62_CHARACTERISTIC_TWO *char_two;
295
296	field->p.char_two = X9_62_CHARACTERISTIC_TWO_new();
297	char_two = field->p.char_two;
298
299	if (char_two == NULL) {
300	ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
301	goto err;
302	}
303
304	char_two->m = (long)EC_GROUP_get_degree(group);
305
306	field_type = EC_GROUP_get_basis_type(group);
307
308	if (field_type == 0) {
309	ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
310	goto err;
311	}
312	/* set base type OID */
313	if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) {
314	ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
315	goto err;
316	}
317
318	if (field_type == NID_X9_62_tpBasis) {
319	unsigned int k;
320
321	if (!EC_GROUP_get_trinomial_basis(group, &k))
322	goto err;
323
324	char_two->p.tpBasis = ASN1_INTEGER_new();
325	if (char_two->p.tpBasis == NULL) {
326	ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
327	goto err;
328	}
329	if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) {
330	ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
331	goto err;
332	}
333	} else if (field_type == NID_X9_62_ppBasis) {
334	unsigned int k1, k2, k3;
335
336	if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3))
337	goto err;
338
339	char_two->p.ppBasis = X9_62_PENTANOMIAL_new();
340	if (char_two->p.ppBasis == NULL) {
341	ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
342	goto err;
343	}
344
345	/* set k? values */
346	char_two->p.ppBasis->k1 = (long)k1;
347	char_two->p.ppBasis->k2 = (long)k2;
348	char_two->p.ppBasis->k3 = (long)k3;
349	} else { /* field_type == NID_X9_62_onBasis */
350
351	/* for ONB the parameters are (asn1) NULL */
352	char_two->p.onBasis = ASN1_NULL_new();
353	if (char_two->p.onBasis == NULL) {
354	ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
355	goto err;
356	}
357	}
358	}
359	#endif
360	else {
361	ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_UNSUPPORTED_FIELD);
362	goto err;
363	}
364
365	ok = 1;
366
367	err:
368	BN_free(tmp);
369	return ok;
370	}
371
372	static int ec_asn1_group2curve(const EC_GROUP group, X9_62_CURVE curve)
373	{
374	int ok = 0;
375	BIGNUM tmp_1 = NULL, tmp_2 = NULL;
376	unsigned char a_buf = NULL, b_buf = NULL;
377	size_t len;
378
379	if (!group \|\| !curve \|\| !curve->a \|\| !curve->b)
380	return 0;
381
382	if ((tmp_1 = BN_new()) == NULL \|\| (tmp_2 = BN_new()) == NULL) {
383	ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
384	goto err;
385	}
386
387	/* get a and b */
388	if (!EC_GROUP_get_curve(group, NULL, tmp_1, tmp_2, NULL)) {
389	ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
390	goto err;
391	}
392
393	/*
394	* Per SEC 1, the curve coefficients must be padded up to size. See C.2's
395	* definition of Curve, C.1's definition of FieldElement, and 2.3.5's
396	* definition of how to encode the field elements.
397	*/
398	len = ((size_t)EC_GROUP_get_degree(group) + 7) / 8;
399	if ((a_buf = OPENSSL_malloc(len)) == NULL
400	\|\| (b_buf = OPENSSL_malloc(len)) == NULL) {
401	ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
402	goto err;
403	}
404	if (BN_bn2binpad(tmp_1, a_buf, len) < 0
405	\|\| BN_bn2binpad(tmp_2, b_buf, len) < 0) {
406	ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
407	goto err;
408	}
409
410	/* set a and b */
411	if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len)
412	\|\| !ASN1_OCTET_STRING_set(curve->b, b_buf, len)) {
413	ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
414	goto err;
415	}
416
417	/* set the seed (optional) */
418	if (group->seed) {
419	if (!curve->seed)
420	if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) {
421	ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
422	goto err;
423	}
424	curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT \| 0x07);
425	curve->seed->flags \|= ASN1_STRING_FLAG_BITS_LEFT;
426	if (!ASN1_BIT_STRING_set(curve->seed, group->seed,
427	(int)group->seed_len)) {
428	ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
429	goto err;
430	}
431	} else {
432	ASN1_BIT_STRING_free(curve->seed);
433	curve->seed = NULL;
434	}
435
436	ok = 1;
437
438	err:
439	OPENSSL_free(a_buf);
440	OPENSSL_free(b_buf);
441	BN_free(tmp_1);
442	BN_free(tmp_2);
443	return ok;
444	}
445
446	ECPARAMETERS EC_GROUP_get_ecparameters(const EC_GROUP group,
447	ECPARAMETERS *params)
448	{
449	size_t len = 0;
450	ECPARAMETERS *ret = NULL;
451	const BIGNUM *tmp;
452	unsigned char *buffer = NULL;
453	const EC_POINT *point = NULL;
454	point_conversion_form_t form;
455	ASN1_INTEGER *orig;
456
457	if (params == NULL) {
458	if ((ret = ECPARAMETERS_new()) == NULL) {
459	ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
460	goto err;
461	}
462	} else
463	ret = params;
464
465	/* set the version (always one) */
466	ret->version = (long)0x1;
467
468	/* set the fieldID */
469	if (!ec_asn1_group2fieldid(group, ret->fieldID)) {
470	ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
471	goto err;
472	}
473
474	/* set the curve */
475	if (!ec_asn1_group2curve(group, ret->curve)) {
476	ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
477	goto err;
478	}
479
480	/* set the base point */
481	if ((point = EC_GROUP_get0_generator(group)) == NULL) {
482	ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, EC_R_UNDEFINED_GENERATOR);
483	goto err;
484	}
485
486	form = EC_GROUP_get_point_conversion_form(group);
487
488	len = EC_POINT_point2buf(group, point, form, &buffer, NULL);
489	if (len == 0) {
490	ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
491	goto err;
492	}
493	if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) {
494	OPENSSL_free(buffer);
495	ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
496	goto err;
497	}
498	ASN1_STRING_set0(ret->base, buffer, len);
499
500	/* set the order */
501	tmp = EC_GROUP_get0_order(group);
502	if (tmp == NULL) {
503	ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
504	goto err;
505	}
506	ret->order = BN_to_ASN1_INTEGER(tmp, orig = ret->order);
507	if (ret->order == NULL) {
508	ret->order = orig;
509	ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
510	goto err;
511	}
512
513	/* set the cofactor (optional) */
514	tmp = EC_GROUP_get0_cofactor(group);
515	if (tmp != NULL) {
516	ret->cofactor = BN_to_ASN1_INTEGER(tmp, orig = ret->cofactor);
517	if (ret->cofactor == NULL) {
518	ret->cofactor = orig;
519	ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
520	goto err;
521	}
522	}
523
524	return ret;
525
526	err:
527	if (params == NULL)
528	ECPARAMETERS_free(ret);
529	return NULL;
530	}
531
532	ECPKPARAMETERS EC_GROUP_get_ecpkparameters(const EC_GROUP group,
533	ECPKPARAMETERS *params)
534	{
535	int ok = 1, tmp;
536	ECPKPARAMETERS *ret = params;
537
538	if (ret == NULL) {
539	if ((ret = ECPKPARAMETERS_new()) == NULL) {
540	ECerr(EC_F_EC_GROUP_GET_ECPKPARAMETERS, ERR_R_MALLOC_FAILURE);
541	return NULL;
542	}
543	} else {
544	if (ret->type == ECPKPARAMETERS_TYPE_NAMED)
545	ASN1_OBJECT_free(ret->value.named_curve);
546	else if (ret->type == ECPKPARAMETERS_TYPE_EXPLICIT
547	&& ret->value.parameters != NULL)
548	ECPARAMETERS_free(ret->value.parameters);
549	}
550
551	if (EC_GROUP_get_asn1_flag(group)) {
552	/*
553	* use the asn1 OID to describe the elliptic curve parameters
554	*/
555	tmp = EC_GROUP_get_curve_name(group);
556	if (tmp) {
557	ASN1_OBJECT *asn1obj = OBJ_nid2obj(tmp);
558
559	if (asn1obj == NULL \|\| OBJ_length(asn1obj) == 0) {
560	ASN1_OBJECT_free(asn1obj);
561	ECerr(EC_F_EC_GROUP_GET_ECPKPARAMETERS, EC_R_MISSING_OID);
562	ok = 0;
563	} else {
564	ret->type = ECPKPARAMETERS_TYPE_NAMED;
565	ret->value.named_curve = asn1obj;
566	}
567	} else
568	/* we don't know the nid => ERROR */
569	ok = 0;
570	} else {
571	/* use the ECPARAMETERS structure */
572	ret->type = ECPKPARAMETERS_TYPE_EXPLICIT;
573	if ((ret->value.parameters =
574	EC_GROUP_get_ecparameters(group, NULL)) == NULL)
575	ok = 0;
576	}
577
578	if (!ok) {
579	ECPKPARAMETERS_free(ret);
580	return NULL;
581	}
582	return ret;
583	}
584
585	EC_GROUP EC_GROUP_new_from_ecparameters(const ECPARAMETERS params)
586	{
587	int ok = 0, tmp;
588	EC_GROUP ret = NULL, dup = NULL;
589	BIGNUM p = NULL, a = NULL, *b = NULL;
590	EC_POINT *point = NULL;
591	long field_bits;
592	int curve_name = NID_undef;
593	BN_CTX *ctx = NULL;
594
595	if (!params->fieldID \|\| !params->fieldID->fieldType \|\|
596	!params->fieldID->p.ptr) {
597	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
598	goto err;
599	}
600
601	/*
602	* Now extract the curve parameters a and b. Note that, although SEC 1
603	* specifies the length of their encodings, historical versions of OpenSSL
604	* encoded them incorrectly, so we must accept any length for backwards
605	* compatibility.
606	*/
607	if (!params->curve \|\| !params->curve->a \|\|
608	!params->curve->a->data \|\| !params->curve->b \|\|
609	!params->curve->b->data) {
610	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
611	goto err;
612	}
613	a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL);
614	if (a == NULL) {
615	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB);
616	goto err;
617	}
618	b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL);
619	if (b == NULL) {
620	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB);
621	goto err;
622	}
623
624	/* get the field parameters */
625	tmp = OBJ_obj2nid(params->fieldID->fieldType);
626	if (tmp == NID_X9_62_characteristic_two_field)
627	#ifdef OPENSSL_NO_EC2M
628	{
629	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_GF2M_NOT_SUPPORTED);
630	goto err;
631	}
632	#else
633	{
634	X9_62_CHARACTERISTIC_TWO *char_two;
635
636	char_two = params->fieldID->p.char_two;
637
638	field_bits = char_two->m;
639	if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
640	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE);
641	goto err;
642	}
643
644	if ((p = BN_new()) == NULL) {
645	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
646	goto err;
647	}
648
649	/* get the base type */
650	tmp = OBJ_obj2nid(char_two->type);
651
652	if (tmp == NID_X9_62_tpBasis) {
653	long tmp_long;
654
655	if (!char_two->p.tpBasis) {
656	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
657	goto err;
658	}
659
660	tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis);
661
662	if (!(char_two->m > tmp_long && tmp_long > 0)) {
663	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS,
664	EC_R_INVALID_TRINOMIAL_BASIS);
665	goto err;
666	}
667
668	/* create the polynomial */
669	if (!BN_set_bit(p, (int)char_two->m))
670	goto err;
671	if (!BN_set_bit(p, (int)tmp_long))
672	goto err;
673	if (!BN_set_bit(p, 0))
674	goto err;
675	} else if (tmp == NID_X9_62_ppBasis) {
676	X9_62_PENTANOMIAL *penta;
677
678	penta = char_two->p.ppBasis;
679	if (!penta) {
680	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
681	goto err;
682	}
683
684	if (!
685	(char_two->m > penta->k3 && penta->k3 > penta->k2
686	&& penta->k2 > penta->k1 && penta->k1 > 0)) {
687	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS,
688	EC_R_INVALID_PENTANOMIAL_BASIS);
689	goto err;
690	}
691
692	/* create the polynomial */
693	if (!BN_set_bit(p, (int)char_two->m))
694	goto err;
695	if (!BN_set_bit(p, (int)penta->k1))
696	goto err;
697	if (!BN_set_bit(p, (int)penta->k2))
698	goto err;
699	if (!BN_set_bit(p, (int)penta->k3))
700	goto err;
701	if (!BN_set_bit(p, 0))
702	goto err;
703	} else if (tmp == NID_X9_62_onBasis) {
704	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_NOT_IMPLEMENTED);
705	goto err;
706	} else { /* error */
707
708	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
709	goto err;
710	}
711
712	/* create the EC_GROUP structure */
713	ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL);
714	}
715	#endif
716	else if (tmp == NID_X9_62_prime_field) {
717	/* we have a curve over a prime field */
718	/* extract the prime number */
719	if (!params->fieldID->p.prime) {
720	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
721	goto err;
722	}
723	p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL);
724	if (p == NULL) {
725	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
726	goto err;
727	}
728
729	if (BN_is_negative(p) \|\| BN_is_zero(p)) {
730	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD);
731	goto err;
732	}
733
734	field_bits = BN_num_bits(p);
735	if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
736	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE);
737	goto err;
738	}
739
740	/* create the EC_GROUP structure */
741	ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
742	} else {
743	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD);
744	goto err;
745	}
746
747	if (ret == NULL) {
748	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
749	goto err;
750	}
751
752	/* extract seed (optional) */
753	if (params->curve->seed != NULL) {
754	OPENSSL_free(ret->seed);
755	if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL) {
756	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
757	goto err;
758	}
759	memcpy(ret->seed, params->curve->seed->data,
760	params->curve->seed->length);
761	ret->seed_len = params->curve->seed->length;
762	}
763
764	if (!params->order \|\| !params->base \|\| !params->base->data) {
765	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
766	goto err;
767	}
768
769	if ((point = EC_POINT_new(ret)) == NULL)
770	goto err;
771
772	/* set the point conversion form */
773	EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t)
774	(params->base->data[0] & ~0x01));
775
776	/* extract the ec point */
777	if (!EC_POINT_oct2point(ret, point, params->base->data,
778	params->base->length, NULL)) {
779	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
780	goto err;
781	}
782
783	/* extract the order */
784	if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) {
785	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
786	goto err;
787	}
788	if (BN_is_negative(a) \|\| BN_is_zero(a)) {
789	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER);
790	goto err;
791	}
792	if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */
793	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER);
794	goto err;
795	}
796
797	/* extract the cofactor (optional) */
798	if (params->cofactor == NULL) {
799	BN_free(b);
800	b = NULL;
801	} else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) {
802	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
803	goto err;
804	}
805	/* set the generator, order and cofactor (if present) */
806	if (!EC_GROUP_set_generator(ret, point, a, b)) {
807	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
808	goto err;
809	}
810
811	/*
812	* Check if the explicit parameters group just created matches one of the
813	* built-in curves.
814	*
815	* We create a copy of the group just built, so that we can remove optional
816	* fields for the lookup: we do this to avoid the possibility that one of
817	* the optional parameters is used to force the library into using a less
818	* performant and less secure EC_METHOD instead of the specialized one.
819	* In any case, `seed` is not really used in any computation, while a
820	* cofactor different from the one in the built-in table is just
821	* mathematically wrong anyway and should not be used.
822	*/
823	if ((ctx = BN_CTX_new()) == NULL) {
824	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB);
825	goto err;
826	}
827	if ((dup = EC_GROUP_dup(ret)) == NULL
828	\|\| EC_GROUP_set_seed(dup, NULL, 0) != 1
829	\|\| !EC_GROUP_set_generator(dup, point, a, NULL)) {
830	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
831	goto err;
832	}
833	if ((curve_name = ec_curve_nid_from_params(dup, ctx)) != NID_undef) {
834	/*
835	* The input explicit parameters successfully matched one of the
836	* built-in curves: often for built-in curves we have specialized
837	* methods with better performance and hardening.
838	*
839	* In this case we replace the `EC_GROUP` created through explicit
840	* parameters with one created from a named group.
841	*/
842	EC_GROUP *named_group = NULL;
843
844	#ifndef OPENSSL_NO_EC_NISTP_64_GCC_128
845	/*
846	* NID_wap_wsg_idm_ecid_wtls12 and NID_secp224r1 are both aliases for
847	* the same curve, we prefer the SECP nid when matching explicit
848	* parameters as that is associated with a specialized EC_METHOD.
849	*/
850	if (curve_name == NID_wap_wsg_idm_ecid_wtls12)
851	curve_name = NID_secp224r1;
852	#endif /* !def(OPENSSL_NO_EC_NISTP_64_GCC_128) */
853
854	if ((named_group = EC_GROUP_new_by_curve_name(curve_name)) == NULL) {
855	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
856	goto err;
857	}
858	EC_GROUP_free(ret);
859	ret = named_group;
860
861	/*
862	* Set the flag so that EC_GROUPs created from explicit parameters are
863	* serialized using explicit parameters by default.
864	*/
865	EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_EXPLICIT_CURVE);
866
867	/*
868	* If the input params do not contain the optional seed field we make
869	* sure it is not added to the returned group.
870	*
871	* The seed field is not really used inside libcrypto anyway, and
872	* adding it to parsed explicit parameter keys would alter their DER
873	* encoding output (because of the extra field) which could impact
874	* applications fingerprinting keys by their DER encoding.
875	*/
876	if (params->curve->seed == NULL) {
877	if (EC_GROUP_set_seed(ret, NULL, 0) != 1)
878	goto err;
879	}
880	}
881
882	ok = 1;
883
884	err:
885	if (!ok) {
886	EC_GROUP_free(ret);
887	ret = NULL;
888	}
889	EC_GROUP_free(dup);
890
891	BN_free(p);
892	BN_free(a);
893	BN_free(b);
894	EC_POINT_free(point);
895
896	BN_CTX_free(ctx);
897
898	return ret;
899	}
900
901	EC_GROUP EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS params)
902	{
903	EC_GROUP *ret = NULL;
904	int tmp = 0;
905
906	if (params == NULL) {
907	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_MISSING_PARAMETERS);
908	return NULL;
909	}
910
911	if (params->type == ECPKPARAMETERS_TYPE_NAMED) {
912	/* the curve is given by an OID */
913	tmp = OBJ_obj2nid(params->value.named_curve);
914	if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) {
915	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS,
916	EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
917	return NULL;
918	}
919	EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE);
920	} else if (params->type == ECPKPARAMETERS_TYPE_EXPLICIT) {
921	/* the parameters are given by an ECPARAMETERS structure */
922	ret = EC_GROUP_new_from_ecparameters(params->value.parameters);
923	if (!ret) {
924	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, ERR_R_EC_LIB);
925	return NULL;
926	}
927	EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_EXPLICIT_CURVE);
928	} else if (params->type == ECPKPARAMETERS_TYPE_IMPLICIT) {
929	/* implicit parameters inherited from CA - unsupported */
930	return NULL;
931	} else {
932	ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_ASN1_ERROR);
933	return NULL;
934	}
935
936	return ret;
937	}
938
939	/* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
940
941	EC_GROUP d2i_ECPKParameters(EC_GROUP a, const unsigned char *in, long len)
942	{
943	EC_GROUP *group = NULL;
944	ECPKPARAMETERS *params = NULL;
945	const unsigned char p = in;
946
947	if ((params = d2i_ECPKPARAMETERS(NULL, &p, len)) == NULL) {
948	ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
949	ECPKPARAMETERS_free(params);
950	return NULL;
951	}
952
953	if ((group = EC_GROUP_new_from_ecpkparameters(params)) == NULL) {
954	ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
955	ECPKPARAMETERS_free(params);
956	return NULL;
957	}
958
959	if (params->type == ECPKPARAMETERS_TYPE_EXPLICIT)
960	group->decoded_from_explicit_params = 1;
961
962	if (a) {
963	EC_GROUP_free(*a);
964	*a = group;
965	}
966
967	ECPKPARAMETERS_free(params);
968	*in = p;
969	return group;
970	}
971
972	int i2d_ECPKParameters(const EC_GROUP a, unsigned char *out)
973	{
974	int ret = 0;
975	ECPKPARAMETERS *tmp = EC_GROUP_get_ecpkparameters(a, NULL);
976	if (tmp == NULL) {
977	ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE);
978	return 0;
979	}
980	if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) {
981	ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE);
982	ECPKPARAMETERS_free(tmp);
983	return 0;
984	}
985	ECPKPARAMETERS_free(tmp);
986	return ret;
987	}
988
989	/* some EC_KEY functions */
990
991	EC_KEY d2i_ECPrivateKey(EC_KEY a, const unsigned char *in, long len)
992	{
993	EC_KEY *ret = NULL;
994	EC_PRIVATEKEY *priv_key = NULL;
995	const unsigned char p = in;
996
997	if ((priv_key = d2i_EC_PRIVATEKEY(NULL, &p, len)) == NULL) {
998	ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
999	return NULL;
1000	}
1001
1002	if (a == NULL \|\| *a == NULL) {
1003	if ((ret = EC_KEY_new()) == NULL) {
1004	ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1005	goto err;
1006	}
1007	} else
1008	ret = *a;
1009
1010	if (priv_key->parameters) {
1011	EC_GROUP_free(ret->group);
1012	ret->group = EC_GROUP_new_from_ecpkparameters(priv_key->parameters);
1013	if (ret->group != NULL
1014	&& priv_key->parameters->type == ECPKPARAMETERS_TYPE_EXPLICIT)
1015	ret->group->decoded_from_explicit_params = 1;
1016	}
1017
1018	if (ret->group == NULL) {
1019	ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1020	goto err;
1021	}
1022
1023	ret->version = priv_key->version;
1024
1025	if (priv_key->privateKey) {
1026	ASN1_OCTET_STRING *pkey = priv_key->privateKey;
1027	if (EC_KEY_oct2priv(ret, ASN1_STRING_get0_data(pkey),
1028	ASN1_STRING_length(pkey)) == 0)
1029	goto err;
1030	} else {
1031	ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY);
1032	goto err;
1033	}
1034
1035	EC_POINT_clear_free(ret->pub_key);
1036	ret->pub_key = EC_POINT_new(ret->group);
1037	if (ret->pub_key == NULL) {
1038	ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1039	goto err;
1040	}
1041
1042	if (priv_key->publicKey) {
1043	const unsigned char *pub_oct;
1044	int pub_oct_len;
1045
1046	pub_oct = ASN1_STRING_get0_data(priv_key->publicKey);
1047	pub_oct_len = ASN1_STRING_length(priv_key->publicKey);
1048	if (!EC_KEY_oct2key(ret, pub_oct, pub_oct_len, NULL)) {
1049	ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1050	goto err;
1051	}
1052	} else {
1053	if (ret->group->meth->keygenpub == NULL
1054	\|\| ret->group->meth->keygenpub(ret) == 0)
1055	goto err;
1056	/* Remember the original private-key-only encoding. */
1057	ret->enc_flag \|= EC_PKEY_NO_PUBKEY;
1058	}
1059
1060	if (a)
1061	*a = ret;
1062	EC_PRIVATEKEY_free(priv_key);
1063	*in = p;
1064	return ret;
1065
1066	err:
1067	if (a == NULL \|\| *a != ret)
1068	EC_KEY_free(ret);
1069	EC_PRIVATEKEY_free(priv_key);
1070	return NULL;
1071	}
1072
1073	int i2d_ECPrivateKey(EC_KEY a, unsigned char *out)
1074	{
1075	int ret = 0, ok = 0;
1076	unsigned char priv= NULL, pub= NULL;
1077	size_t privlen = 0, publen = 0;
1078
1079	EC_PRIVATEKEY *priv_key = NULL;
1080
1081	if (a == NULL \|\| a->group == NULL \|\|
1082	(!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) {
1083	ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
1084	goto err;
1085	}
1086
1087	if ((priv_key = EC_PRIVATEKEY_new()) == NULL) {
1088	ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1089	goto err;
1090	}
1091
1092	priv_key->version = a->version;
1093
1094	privlen = EC_KEY_priv2buf(a, &priv);
1095
1096	if (privlen == 0) {
1097	ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1098	goto err;
1099	}
1100
1101	ASN1_STRING_set0(priv_key->privateKey, priv, privlen);
1102	priv = NULL;
1103
1104	if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) {
1105	if ((priv_key->parameters =
1106	EC_GROUP_get_ecpkparameters(a->group,
1107	priv_key->parameters)) == NULL) {
1108	ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1109	goto err;
1110	}
1111	}
1112
1113	if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) {
1114	priv_key->publicKey = ASN1_BIT_STRING_new();
1115	if (priv_key->publicKey == NULL) {
1116	ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1117	goto err;
1118	}
1119
1120	publen = EC_KEY_key2buf(a, a->conv_form, &pub, NULL);
1121
1122	if (publen == 0) {
1123	ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1124	goto err;
1125	}
1126
1127	priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT \| 0x07);
1128	priv_key->publicKey->flags \|= ASN1_STRING_FLAG_BITS_LEFT;
1129	ASN1_STRING_set0(priv_key->publicKey, pub, publen);
1130	pub = NULL;
1131	}
1132
1133	if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) {
1134	ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1135	goto err;
1136	}
1137	ok = 1;
1138	err:
1139	OPENSSL_clear_free(priv, privlen);
1140	OPENSSL_free(pub);
1141	EC_PRIVATEKEY_free(priv_key);
1142	return (ok ? ret : 0);
1143	}
1144
1145	int i2d_ECParameters(EC_KEY a, unsigned char *out)
1146	{
1147	if (a == NULL) {
1148	ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1149	return 0;
1150	}
1151	return i2d_ECPKParameters(a->group, out);
1152	}
1153
1154	EC_KEY d2i_ECParameters(EC_KEY a, const unsigned char *in, long len)
1155	{
1156	EC_KEY *ret;
1157
1158	if (in == NULL \|\| *in == NULL) {
1159	ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1160	return NULL;
1161	}
1162
1163	if (a == NULL \|\| *a == NULL) {
1164	if ((ret = EC_KEY_new()) == NULL) {
1165	ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
1166	return NULL;
1167	}
1168	} else
1169	ret = *a;
1170
1171	if (!d2i_ECPKParameters(&ret->group, in, len)) {
1172	ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
1173	if (a == NULL \|\| *a != ret)
1174	EC_KEY_free(ret);
1175	return NULL;
1176	}
1177
1178	if (a)
1179	*a = ret;
1180
1181	return ret;
1182	}
1183
1184	EC_KEY o2i_ECPublicKey(EC_KEY a, const unsigned char *in, long len)
1185	{
1186	EC_KEY *ret = NULL;
1187
1188	if (a == NULL \|\| (a) == NULL \|\| (a)->group == NULL) {
1189	/*
1190	* sorry, but a EC_GROUP-structure is necessary to set the public key
1191	*/
1192	ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1193	return 0;
1194	}
1195	ret = *a;
1196	if (!EC_KEY_oct2key(ret, *in, len, NULL)) {
1197	ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB);
1198	return 0;
1199	}
1200	*in += len;
1201	return ret;
1202	}
1203
1204	int i2o_ECPublicKey(const EC_KEY a, unsigned char *out)
1205	{
1206	size_t buf_len = 0;
1207	int new_buffer = 0;
1208
1209	if (a == NULL) {
1210	ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1211	return 0;
1212	}
1213
1214	buf_len = EC_POINT_point2oct(a->group, a->pub_key,
1215	a->conv_form, NULL, 0, NULL);
1216
1217	if (out == NULL \|\| buf_len == 0)
1218	/* out == NULL => just return the length of the octet string */
1219	return buf_len;
1220
1221	if (*out == NULL) {
1222	if ((*out = OPENSSL_malloc(buf_len)) == NULL) {
1223	ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
1224	return 0;
1225	}
1226	new_buffer = 1;
1227	}
1228	if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form,
1229	*out, buf_len, NULL)) {
1230	ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB);
1231	if (new_buffer) {
1232	OPENSSL_free(*out);
1233	*out = NULL;
1234	}
1235	return 0;
1236	}
1237	if (!new_buffer)
1238	*out += buf_len;
1239	return buf_len;
1240	}
1241
1242	ASN1_SEQUENCE(ECDSA_SIG) = {
1243	ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM),
1244	ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM)
1245	} static_ASN1_SEQUENCE_END(ECDSA_SIG)
1246
1247	DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG)
1248	DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG)
1249	IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSA_SIG, ECDSA_SIG, ECDSA_SIG)
1250
1251	ECDSA_SIG *ECDSA_SIG_new(void)
1252	{
1253	ECDSA_SIG sig = OPENSSL_zalloc(sizeof(sig));
1254	if (sig == NULL)
1255	ECerr(EC_F_ECDSA_SIG_NEW, ERR_R_MALLOC_FAILURE);
1256	return sig;
1257	}
1258
1259	void ECDSA_SIG_free(ECDSA_SIG *sig)
1260	{
1261	if (sig == NULL)
1262	return;
1263	BN_clear_free(sig->r);
1264	BN_clear_free(sig->s);
1265	OPENSSL_free(sig);
1266	}
1267
1268	void ECDSA_SIG_get0(const ECDSA_SIG sig, const BIGNUM pr, const BIGNUM *ps)
1269	{
1270	if (pr != NULL)
1271	*pr = sig->r;
1272	if (ps != NULL)
1273	*ps = sig->s;
1274	}
1275
1276	const BIGNUM ECDSA_SIG_get0_r(const ECDSA_SIG sig)
1277	{
1278	return sig->r;
1279	}
1280
1281	const BIGNUM ECDSA_SIG_get0_s(const ECDSA_SIG sig)
1282	{
1283	return sig->s;
1284	}
1285
1286	int ECDSA_SIG_set0(ECDSA_SIG sig, BIGNUM r, BIGNUM *s)
1287	{
1288	if (r == NULL \|\| s == NULL)
1289	return 0;
1290	BN_clear_free(sig->r);
1291	BN_clear_free(sig->s);
1292	sig->r = r;
1293	sig->s = s;
1294	return 1;
1295	}
1296
1297	int ECDSA_size(const EC_KEY *r)
1298	{
1299	int ret, i;
1300	ASN1_INTEGER bs;
1301	unsigned char buf[4];
1302	const EC_GROUP *group;
1303
1304	if (r == NULL)
1305	return 0;
1306	group = EC_KEY_get0_group(r);
1307	if (group == NULL)
1308	return 0;
1309
1310	i = EC_GROUP_order_bits(group);
1311	if (i == 0)
1312	return 0;
1313	bs.length = (i + 7) / 8;
1314	bs.data = buf;
1315	bs.type = V_ASN1_INTEGER;
1316	/* If the top bit is set the asn1 encoding is 1 larger. */
1317	buf[0] = 0xff;
1318
1319	i = i2d_ASN1_INTEGER(&bs, NULL);
1320	i += i; /* r and s */
1321	ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
1322	if (ret < 0)
1323	return 0;
1324	return ret;
1325	}

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source: vbox/trunk/src/libs/openssl-1.1.1j/crypto/ec/ec_asn1.c@ 88461

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