1 /* crypto/ec/ec_asn1.c */
3 * Written by Nils Larsch for the OpenSSL project.
5 /* ====================================================================
6 * Copyright (c) 2000-2003 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
61 #include <openssl/err.h>
62 #include <openssl/asn1t.h>
63 #include <openssl/objects.h>
65 int EC_GROUP_get_basis_type(const EC_GROUP
*group
)
69 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group
)) !=
70 NID_X9_62_characteristic_two_field
)
71 /* everything else is currently not supported */
74 while (group
->poly
[i
] != 0)
78 return NID_X9_62_ppBasis
;
80 return NID_X9_62_tpBasis
;
82 /* everything else is currently not supported */
86 #ifndef OPENSSL_NO_EC2M
87 int EC_GROUP_get_trinomial_basis(const EC_GROUP
*group
, unsigned int *k
)
92 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group
)) !=
93 NID_X9_62_characteristic_two_field
94 || !((group
->poly
[0] != 0) && (group
->poly
[1] != 0)
95 && (group
->poly
[2] == 0))) {
96 ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS
,
97 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
107 int EC_GROUP_get_pentanomial_basis(const EC_GROUP
*group
, unsigned int *k1
,
108 unsigned int *k2
, unsigned int *k3
)
113 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group
)) !=
114 NID_X9_62_characteristic_two_field
115 || !((group
->poly
[0] != 0) && (group
->poly
[1] != 0)
116 && (group
->poly
[2] != 0) && (group
->poly
[3] != 0)
117 && (group
->poly
[4] == 0))) {
118 ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS
,
119 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
124 *k1
= group
->poly
[3];
126 *k2
= group
->poly
[2];
128 *k3
= group
->poly
[1];
134 /* some structures needed for the asn1 encoding */
135 typedef struct x9_62_pentanomial_st
{
141 typedef struct x9_62_characteristic_two_st
{
146 /* NID_X9_62_onBasis */
148 /* NID_X9_62_tpBasis */
149 ASN1_INTEGER
*tpBasis
;
150 /* NID_X9_62_ppBasis */
151 X9_62_PENTANOMIAL
*ppBasis
;
155 } X9_62_CHARACTERISTIC_TWO
;
157 typedef struct x9_62_fieldid_st
{
158 ASN1_OBJECT
*fieldType
;
161 /* NID_X9_62_prime_field */
163 /* NID_X9_62_characteristic_two_field */
164 X9_62_CHARACTERISTIC_TWO
*char_two
;
170 typedef struct x9_62_curve_st
{
171 ASN1_OCTET_STRING
*a
;
172 ASN1_OCTET_STRING
*b
;
173 ASN1_BIT_STRING
*seed
;
176 typedef struct ec_parameters_st
{
178 X9_62_FIELDID
*fieldID
;
180 ASN1_OCTET_STRING
*base
;
182 ASN1_INTEGER
*cofactor
;
185 struct ecpk_parameters_st
{
188 ASN1_OBJECT
*named_curve
;
189 ECPARAMETERS
*parameters
;
190 ASN1_NULL
*implicitlyCA
;
192 } /* ECPKPARAMETERS */ ;
194 /* SEC1 ECPrivateKey */
195 typedef struct ec_privatekey_st
{
197 ASN1_OCTET_STRING
*privateKey
;
198 ECPKPARAMETERS
*parameters
;
199 ASN1_BIT_STRING
*publicKey
;
202 /* the OpenSSL ASN.1 definitions */
203 ASN1_SEQUENCE(X9_62_PENTANOMIAL
) = {
204 ASN1_SIMPLE(X9_62_PENTANOMIAL
, k1
, LONG
),
205 ASN1_SIMPLE(X9_62_PENTANOMIAL
, k2
, LONG
),
206 ASN1_SIMPLE(X9_62_PENTANOMIAL
, k3
, LONG
)
207 } static_ASN1_SEQUENCE_END(X9_62_PENTANOMIAL
)
209 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL
)
210 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL
)
212 ASN1_ADB_TEMPLATE(char_two_def
) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, p
.other
, ASN1_ANY
);
214 ASN1_ADB(X9_62_CHARACTERISTIC_TWO
) = {
215 ADB_ENTRY(NID_X9_62_onBasis
, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, p
.onBasis
, ASN1_NULL
)),
216 ADB_ENTRY(NID_X9_62_tpBasis
, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, p
.tpBasis
, ASN1_INTEGER
)),
217 ADB_ENTRY(NID_X9_62_ppBasis
, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, p
.ppBasis
, X9_62_PENTANOMIAL
))
218 } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO
, 0, type
, 0, &char_two_def_tt
, NULL
);
220 ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO
) = {
221 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, m
, LONG
),
222 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, type
, ASN1_OBJECT
),
223 ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO
)
224 } static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO
)
226 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO
)
227 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO
)
229 ASN1_ADB_TEMPLATE(fieldID_def
) = ASN1_SIMPLE(X9_62_FIELDID
, p
.other
, ASN1_ANY
);
231 ASN1_ADB(X9_62_FIELDID
) = {
232 ADB_ENTRY(NID_X9_62_prime_field
, ASN1_SIMPLE(X9_62_FIELDID
, p
.prime
, ASN1_INTEGER
)),
233 ADB_ENTRY(NID_X9_62_characteristic_two_field
, ASN1_SIMPLE(X9_62_FIELDID
, p
.char_two
, X9_62_CHARACTERISTIC_TWO
))
234 } ASN1_ADB_END(X9_62_FIELDID
, 0, fieldType
, 0, &fieldID_def_tt
, NULL
);
236 ASN1_SEQUENCE(X9_62_FIELDID
) = {
237 ASN1_SIMPLE(X9_62_FIELDID
, fieldType
, ASN1_OBJECT
),
238 ASN1_ADB_OBJECT(X9_62_FIELDID
)
239 } static_ASN1_SEQUENCE_END(X9_62_FIELDID
)
241 ASN1_SEQUENCE(X9_62_CURVE
) = {
242 ASN1_SIMPLE(X9_62_CURVE
, a
, ASN1_OCTET_STRING
),
243 ASN1_SIMPLE(X9_62_CURVE
, b
, ASN1_OCTET_STRING
),
244 ASN1_OPT(X9_62_CURVE
, seed
, ASN1_BIT_STRING
)
245 } static_ASN1_SEQUENCE_END(X9_62_CURVE
)
247 ASN1_SEQUENCE(ECPARAMETERS
) = {
248 ASN1_SIMPLE(ECPARAMETERS
, version
, LONG
),
249 ASN1_SIMPLE(ECPARAMETERS
, fieldID
, X9_62_FIELDID
),
250 ASN1_SIMPLE(ECPARAMETERS
, curve
, X9_62_CURVE
),
251 ASN1_SIMPLE(ECPARAMETERS
, base
, ASN1_OCTET_STRING
),
252 ASN1_SIMPLE(ECPARAMETERS
, order
, ASN1_INTEGER
),
253 ASN1_OPT(ECPARAMETERS
, cofactor
, ASN1_INTEGER
)
254 } static_ASN1_SEQUENCE_END(ECPARAMETERS
)
256 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS
)
257 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS
)
259 ASN1_CHOICE(ECPKPARAMETERS
) = {
260 ASN1_SIMPLE(ECPKPARAMETERS
, value
.named_curve
, ASN1_OBJECT
),
261 ASN1_SIMPLE(ECPKPARAMETERS
, value
.parameters
, ECPARAMETERS
),
262 ASN1_SIMPLE(ECPKPARAMETERS
, value
.implicitlyCA
, ASN1_NULL
)
263 } static_ASN1_CHOICE_END(ECPKPARAMETERS
)
265 DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS
)
266 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS
, ECPKPARAMETERS
)
267 IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS
)
269 ASN1_SEQUENCE(EC_PRIVATEKEY
) = {
270 ASN1_SIMPLE(EC_PRIVATEKEY
, version
, LONG
),
271 ASN1_SIMPLE(EC_PRIVATEKEY
, privateKey
, ASN1_OCTET_STRING
),
272 ASN1_EXP_OPT(EC_PRIVATEKEY
, parameters
, ECPKPARAMETERS
, 0),
273 ASN1_EXP_OPT(EC_PRIVATEKEY
, publicKey
, ASN1_BIT_STRING
, 1)
274 } static_ASN1_SEQUENCE_END(EC_PRIVATEKEY
)
276 DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY
)
277 DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY
, EC_PRIVATEKEY
)
278 IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY
)
280 /* some declarations of internal function */
282 /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */
283 static int ec_asn1_group2fieldid(const EC_GROUP
*, X9_62_FIELDID
*);
284 /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */
285 static int ec_asn1_group2curve(const EC_GROUP
*, X9_62_CURVE
*);
287 * ec_asn1_parameters2group() creates a EC_GROUP object from a ECPARAMETERS
290 static EC_GROUP
*ec_asn1_parameters2group(const ECPARAMETERS
*);
292 * ec_asn1_group2parameters() creates a ECPARAMETERS object from a EC_GROUP
295 static ECPARAMETERS
*ec_asn1_group2parameters(const EC_GROUP
*,
298 * ec_asn1_pkparameters2group() creates a EC_GROUP object from a
299 * ECPKPARAMETERS object
301 static EC_GROUP
*ec_asn1_pkparameters2group(const ECPKPARAMETERS
*);
303 * ec_asn1_group2pkparameters() creates a ECPKPARAMETERS object from a
306 static ECPKPARAMETERS
*ec_asn1_group2pkparameters(const EC_GROUP
*,
309 /* the function definitions */
311 static int ec_asn1_group2fieldid(const EC_GROUP
*group
, X9_62_FIELDID
*field
)
316 if (group
== NULL
|| field
== NULL
)
319 /* clear the old values (if necessary) */
320 ASN1_OBJECT_free(field
->fieldType
);
321 ASN1_TYPE_free(field
->p
.other
);
323 nid
= EC_METHOD_get_field_type(EC_GROUP_method_of(group
));
324 /* set OID for the field */
325 if ((field
->fieldType
= OBJ_nid2obj(nid
)) == NULL
) {
326 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_OBJ_LIB
);
330 if (nid
== NID_X9_62_prime_field
) {
331 if ((tmp
= BN_new()) == NULL
) {
332 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
335 /* the parameters are specified by the prime number p */
336 if (!EC_GROUP_get_curve_GFp(group
, tmp
, NULL
, NULL
, NULL
)) {
337 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_EC_LIB
);
340 /* set the prime number */
341 field
->p
.prime
= BN_to_ASN1_INTEGER(tmp
, NULL
);
342 if (field
->p
.prime
== NULL
) {
343 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_ASN1_LIB
);
346 } else /* nid == NID_X9_62_characteristic_two_field */
347 #ifdef OPENSSL_NO_EC2M
349 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, EC_R_GF2M_NOT_SUPPORTED
);
355 X9_62_CHARACTERISTIC_TWO
*char_two
;
357 field
->p
.char_two
= X9_62_CHARACTERISTIC_TWO_new();
358 char_two
= field
->p
.char_two
;
360 if (char_two
== NULL
) {
361 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
365 char_two
->m
= (long)EC_GROUP_get_degree(group
);
367 field_type
= EC_GROUP_get_basis_type(group
);
369 if (field_type
== 0) {
370 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_EC_LIB
);
373 /* set base type OID */
374 if ((char_two
->type
= OBJ_nid2obj(field_type
)) == NULL
) {
375 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_OBJ_LIB
);
379 if (field_type
== NID_X9_62_tpBasis
) {
382 if (!EC_GROUP_get_trinomial_basis(group
, &k
))
385 char_two
->p
.tpBasis
= ASN1_INTEGER_new();
386 if (char_two
->p
.tpBasis
== NULL
) {
387 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
390 if (!ASN1_INTEGER_set(char_two
->p
.tpBasis
, (long)k
)) {
391 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_ASN1_LIB
);
394 } else if (field_type
== NID_X9_62_ppBasis
) {
395 unsigned int k1
, k2
, k3
;
397 if (!EC_GROUP_get_pentanomial_basis(group
, &k1
, &k2
, &k3
))
400 char_two
->p
.ppBasis
= X9_62_PENTANOMIAL_new();
401 if (char_two
->p
.ppBasis
== NULL
) {
402 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
407 char_two
->p
.ppBasis
->k1
= (long)k1
;
408 char_two
->p
.ppBasis
->k2
= (long)k2
;
409 char_two
->p
.ppBasis
->k3
= (long)k3
;
410 } else { /* field_type == NID_X9_62_onBasis */
412 /* for ONB the parameters are (asn1) NULL */
413 char_two
->p
.onBasis
= ASN1_NULL_new();
414 if (char_two
->p
.onBasis
== NULL
) {
415 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
429 static int ec_asn1_group2curve(const EC_GROUP
*group
, X9_62_CURVE
*curve
)
432 BIGNUM
*tmp_1
= NULL
, *tmp_2
= NULL
;
433 unsigned char *buffer_1
= NULL
, *buffer_2
= NULL
,
434 *a_buf
= NULL
, *b_buf
= NULL
;
436 unsigned char char_zero
= 0;
438 if (!group
|| !curve
|| !curve
->a
|| !curve
->b
)
441 if ((tmp_1
= BN_new()) == NULL
|| (tmp_2
= BN_new()) == NULL
) {
442 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
446 nid
= EC_METHOD_get_field_type(EC_GROUP_method_of(group
));
449 if (nid
== NID_X9_62_prime_field
) {
450 if (!EC_GROUP_get_curve_GFp(group
, NULL
, tmp_1
, tmp_2
, NULL
)) {
451 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_EC_LIB
);
455 #ifndef OPENSSL_NO_EC2M
456 else { /* nid == NID_X9_62_characteristic_two_field */
458 if (!EC_GROUP_get_curve_GF2m(group
, NULL
, tmp_1
, tmp_2
, NULL
)) {
459 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_EC_LIB
);
464 len_1
= (size_t)BN_num_bytes(tmp_1
);
465 len_2
= (size_t)BN_num_bytes(tmp_2
);
468 /* len_1 == 0 => a == 0 */
472 if ((buffer_1
= OPENSSL_malloc(len_1
)) == NULL
) {
473 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
476 if ((len_1
= BN_bn2bin(tmp_1
, buffer_1
)) == 0) {
477 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_BN_LIB
);
484 /* len_2 == 0 => b == 0 */
488 if ((buffer_2
= OPENSSL_malloc(len_2
)) == NULL
) {
489 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
492 if ((len_2
= BN_bn2bin(tmp_2
, buffer_2
)) == 0) {
493 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_BN_LIB
);
500 if (!ASN1_OCTET_STRING_set(curve
->a
, a_buf
, len_1
) ||
501 !ASN1_OCTET_STRING_set(curve
->b
, b_buf
, len_2
)) {
502 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_ASN1_LIB
);
506 /* set the seed (optional) */
509 if ((curve
->seed
= ASN1_BIT_STRING_new()) == NULL
) {
510 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
513 curve
->seed
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
| 0x07);
514 curve
->seed
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
515 if (!ASN1_BIT_STRING_set(curve
->seed
, group
->seed
,
516 (int)group
->seed_len
)) {
517 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_ASN1_LIB
);
521 ASN1_BIT_STRING_free(curve
->seed
);
528 OPENSSL_free(buffer_1
);
529 OPENSSL_free(buffer_2
);
535 static ECPARAMETERS
*ec_asn1_group2parameters(const EC_GROUP
*group
,
539 ECPARAMETERS
*ret
= NULL
;
541 unsigned char *buffer
= NULL
;
542 const EC_POINT
*point
= NULL
;
543 point_conversion_form_t form
;
545 if ((tmp
= BN_new()) == NULL
) {
546 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_MALLOC_FAILURE
);
551 if ((ret
= ECPARAMETERS_new()) == NULL
) {
552 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_MALLOC_FAILURE
);
558 /* set the version (always one) */
559 ret
->version
= (long)0x1;
561 /* set the fieldID */
562 if (!ec_asn1_group2fieldid(group
, ret
->fieldID
)) {
563 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_EC_LIB
);
568 if (!ec_asn1_group2curve(group
, ret
->curve
)) {
569 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_EC_LIB
);
573 /* set the base point */
574 if ((point
= EC_GROUP_get0_generator(group
)) == NULL
) {
575 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, EC_R_UNDEFINED_GENERATOR
);
579 form
= EC_GROUP_get_point_conversion_form(group
);
581 len
= EC_POINT_point2oct(group
, point
, form
, NULL
, len
, NULL
);
583 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_EC_LIB
);
586 if ((buffer
= OPENSSL_malloc(len
)) == NULL
) {
587 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_MALLOC_FAILURE
);
590 if (!EC_POINT_point2oct(group
, point
, form
, buffer
, len
, NULL
)) {
591 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_EC_LIB
);
594 if (ret
->base
== NULL
&& (ret
->base
= ASN1_OCTET_STRING_new()) == NULL
) {
595 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_MALLOC_FAILURE
);
598 if (!ASN1_OCTET_STRING_set(ret
->base
, buffer
, len
)) {
599 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_ASN1_LIB
);
604 if (!EC_GROUP_get_order(group
, tmp
, NULL
)) {
605 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_EC_LIB
);
608 ret
->order
= BN_to_ASN1_INTEGER(tmp
, ret
->order
);
609 if (ret
->order
== NULL
) {
610 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_ASN1_LIB
);
614 /* set the cofactor (optional) */
615 if (EC_GROUP_get_cofactor(group
, tmp
, NULL
)) {
616 ret
->cofactor
= BN_to_ASN1_INTEGER(tmp
, ret
->cofactor
);
617 if (ret
->cofactor
== NULL
) {
618 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_ASN1_LIB
);
627 ECPARAMETERS_free(ret
);
629 OPENSSL_free(buffer
);
633 ECPKPARAMETERS
*ec_asn1_group2pkparameters(const EC_GROUP
*group
,
634 ECPKPARAMETERS
*params
)
637 ECPKPARAMETERS
*ret
= params
;
640 if ((ret
= ECPKPARAMETERS_new()) == NULL
) {
641 ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS
, ERR_R_MALLOC_FAILURE
);
646 ASN1_OBJECT_free(ret
->value
.named_curve
);
647 else if (ret
->type
== 1 && ret
->value
.parameters
)
648 ECPARAMETERS_free(ret
->value
.parameters
);
651 if (EC_GROUP_get_asn1_flag(group
)) {
653 * use the asn1 OID to describe the the elliptic curve parameters
655 tmp
= EC_GROUP_get_curve_name(group
);
658 if ((ret
->value
.named_curve
= OBJ_nid2obj(tmp
)) == NULL
)
661 /* we don't kmow the nid => ERROR */
664 /* use the ECPARAMETERS structure */
666 if ((ret
->value
.parameters
=
667 ec_asn1_group2parameters(group
, NULL
)) == NULL
)
672 ECPKPARAMETERS_free(ret
);
678 static EC_GROUP
*ec_asn1_parameters2group(const ECPARAMETERS
*params
)
681 EC_GROUP
*ret
= NULL
;
682 BIGNUM
*p
= NULL
, *a
= NULL
, *b
= NULL
;
683 EC_POINT
*point
= NULL
;
686 if (!params
->fieldID
|| !params
->fieldID
->fieldType
||
687 !params
->fieldID
->p
.ptr
) {
688 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
692 /* now extract the curve parameters a and b */
693 if (!params
->curve
|| !params
->curve
->a
||
694 !params
->curve
->a
->data
|| !params
->curve
->b
||
695 !params
->curve
->b
->data
) {
696 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
699 a
= BN_bin2bn(params
->curve
->a
->data
, params
->curve
->a
->length
, NULL
);
701 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_BN_LIB
);
704 b
= BN_bin2bn(params
->curve
->b
->data
, params
->curve
->b
->length
, NULL
);
706 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_BN_LIB
);
710 /* get the field parameters */
711 tmp
= OBJ_obj2nid(params
->fieldID
->fieldType
);
712 if (tmp
== NID_X9_62_characteristic_two_field
)
713 #ifdef OPENSSL_NO_EC2M
715 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_GF2M_NOT_SUPPORTED
);
720 X9_62_CHARACTERISTIC_TWO
*char_two
;
722 char_two
= params
->fieldID
->p
.char_two
;
724 field_bits
= char_two
->m
;
725 if (field_bits
> OPENSSL_ECC_MAX_FIELD_BITS
) {
726 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_FIELD_TOO_LARGE
);
730 if ((p
= BN_new()) == NULL
) {
731 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_MALLOC_FAILURE
);
735 /* get the base type */
736 tmp
= OBJ_obj2nid(char_two
->type
);
738 if (tmp
== NID_X9_62_tpBasis
) {
741 if (!char_two
->p
.tpBasis
) {
742 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
746 tmp_long
= ASN1_INTEGER_get(char_two
->p
.tpBasis
);
748 if (!(char_two
->m
> tmp_long
&& tmp_long
> 0)) {
749 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
,
750 EC_R_INVALID_TRINOMIAL_BASIS
);
754 /* create the polynomial */
755 if (!BN_set_bit(p
, (int)char_two
->m
))
757 if (!BN_set_bit(p
, (int)tmp_long
))
759 if (!BN_set_bit(p
, 0))
761 } else if (tmp
== NID_X9_62_ppBasis
) {
762 X9_62_PENTANOMIAL
*penta
;
764 penta
= char_two
->p
.ppBasis
;
766 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
771 (char_two
->m
> penta
->k3
&& penta
->k3
> penta
->k2
772 && penta
->k2
> penta
->k1
&& penta
->k1
> 0)) {
773 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
,
774 EC_R_INVALID_PENTANOMIAL_BASIS
);
778 /* create the polynomial */
779 if (!BN_set_bit(p
, (int)char_two
->m
))
781 if (!BN_set_bit(p
, (int)penta
->k1
))
783 if (!BN_set_bit(p
, (int)penta
->k2
))
785 if (!BN_set_bit(p
, (int)penta
->k3
))
787 if (!BN_set_bit(p
, 0))
789 } else if (tmp
== NID_X9_62_onBasis
) {
790 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_NOT_IMPLEMENTED
);
794 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
798 /* create the EC_GROUP structure */
799 ret
= EC_GROUP_new_curve_GF2m(p
, a
, b
, NULL
);
802 else if (tmp
== NID_X9_62_prime_field
) {
803 /* we have a curve over a prime field */
804 /* extract the prime number */
805 if (!params
->fieldID
->p
.prime
) {
806 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
809 p
= ASN1_INTEGER_to_BN(params
->fieldID
->p
.prime
, NULL
);
811 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_ASN1_LIB
);
815 if (BN_is_negative(p
) || BN_is_zero(p
)) {
816 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_INVALID_FIELD
);
820 field_bits
= BN_num_bits(p
);
821 if (field_bits
> OPENSSL_ECC_MAX_FIELD_BITS
) {
822 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_FIELD_TOO_LARGE
);
826 /* create the EC_GROUP structure */
827 ret
= EC_GROUP_new_curve_GFp(p
, a
, b
, NULL
);
829 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_INVALID_FIELD
);
834 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_EC_LIB
);
838 /* extract seed (optional) */
839 if (params
->curve
->seed
!= NULL
) {
840 OPENSSL_free(ret
->seed
);
841 if ((ret
->seed
= OPENSSL_malloc(params
->curve
->seed
->length
)) == NULL
) {
842 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_MALLOC_FAILURE
);
845 memcpy(ret
->seed
, params
->curve
->seed
->data
,
846 params
->curve
->seed
->length
);
847 ret
->seed_len
= params
->curve
->seed
->length
;
850 if (!params
->order
|| !params
->base
|| !params
->base
->data
) {
851 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
855 if ((point
= EC_POINT_new(ret
)) == NULL
)
858 /* set the point conversion form */
859 EC_GROUP_set_point_conversion_form(ret
, (point_conversion_form_t
)
860 (params
->base
->data
[0] & ~0x01));
862 /* extract the ec point */
863 if (!EC_POINT_oct2point(ret
, point
, params
->base
->data
,
864 params
->base
->length
, NULL
)) {
865 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_EC_LIB
);
869 /* extract the order */
870 if ((a
= ASN1_INTEGER_to_BN(params
->order
, a
)) == NULL
) {
871 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_ASN1_LIB
);
874 if (BN_is_negative(a
) || BN_is_zero(a
)) {
875 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_INVALID_GROUP_ORDER
);
878 if (BN_num_bits(a
) > (int)field_bits
+ 1) { /* Hasse bound */
879 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_INVALID_GROUP_ORDER
);
883 /* extract the cofactor (optional) */
884 if (params
->cofactor
== NULL
) {
887 } else if ((b
= ASN1_INTEGER_to_BN(params
->cofactor
, b
)) == NULL
) {
888 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_ASN1_LIB
);
891 /* set the generator, order and cofactor (if present) */
892 if (!EC_GROUP_set_generator(ret
, point
, a
, b
)) {
893 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_EC_LIB
);
901 EC_GROUP_clear_free(ret
);
908 EC_POINT_free(point
);
912 EC_GROUP
*ec_asn1_pkparameters2group(const ECPKPARAMETERS
*params
)
914 EC_GROUP
*ret
= NULL
;
917 if (params
== NULL
) {
918 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP
, EC_R_MISSING_PARAMETERS
);
922 if (params
->type
== 0) { /* the curve is given by an OID */
923 tmp
= OBJ_obj2nid(params
->value
.named_curve
);
924 if ((ret
= EC_GROUP_new_by_curve_name(tmp
)) == NULL
) {
925 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP
,
926 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE
);
929 EC_GROUP_set_asn1_flag(ret
, OPENSSL_EC_NAMED_CURVE
);
930 } else if (params
->type
== 1) { /* the parameters are given by a
931 * ECPARAMETERS structure */
932 ret
= ec_asn1_parameters2group(params
->value
.parameters
);
934 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP
, ERR_R_EC_LIB
);
937 EC_GROUP_set_asn1_flag(ret
, 0x0);
938 } else if (params
->type
== 2) { /* implicitlyCA */
941 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
948 /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
950 EC_GROUP
*d2i_ECPKParameters(EC_GROUP
**a
, const unsigned char **in
, long len
)
952 EC_GROUP
*group
= NULL
;
953 ECPKPARAMETERS
*params
= NULL
;
954 const unsigned char *p
= *in
;
956 if ((params
= d2i_ECPKPARAMETERS(NULL
, &p
, len
)) == NULL
) {
957 ECerr(EC_F_D2I_ECPKPARAMETERS
, EC_R_D2I_ECPKPARAMETERS_FAILURE
);
958 ECPKPARAMETERS_free(params
);
962 if ((group
= ec_asn1_pkparameters2group(params
)) == NULL
) {
963 ECerr(EC_F_D2I_ECPKPARAMETERS
, EC_R_PKPARAMETERS2GROUP_FAILURE
);
964 ECPKPARAMETERS_free(params
);
969 EC_GROUP_clear_free(*a
);
973 ECPKPARAMETERS_free(params
);
978 int i2d_ECPKParameters(const EC_GROUP
*a
, unsigned char **out
)
981 ECPKPARAMETERS
*tmp
= ec_asn1_group2pkparameters(a
, NULL
);
983 ECerr(EC_F_I2D_ECPKPARAMETERS
, EC_R_GROUP2PKPARAMETERS_FAILURE
);
986 if ((ret
= i2d_ECPKPARAMETERS(tmp
, out
)) == 0) {
987 ECerr(EC_F_I2D_ECPKPARAMETERS
, EC_R_I2D_ECPKPARAMETERS_FAILURE
);
988 ECPKPARAMETERS_free(tmp
);
991 ECPKPARAMETERS_free(tmp
);
995 /* some EC_KEY functions */
997 EC_KEY
*d2i_ECPrivateKey(EC_KEY
**a
, const unsigned char **in
, long len
)
1000 EC_PRIVATEKEY
*priv_key
= NULL
;
1001 const unsigned char *p
= *in
;
1003 if ((priv_key
= d2i_EC_PRIVATEKEY(NULL
, &p
, len
)) == NULL
) {
1004 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1008 if (a
== NULL
|| *a
== NULL
) {
1009 if ((ret
= EC_KEY_new()) == NULL
) {
1010 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1016 if (priv_key
->parameters
) {
1017 EC_GROUP_clear_free(ret
->group
);
1018 ret
->group
= ec_asn1_pkparameters2group(priv_key
->parameters
);
1021 if (ret
->group
== NULL
) {
1022 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1026 ret
->version
= priv_key
->version
;
1028 if (priv_key
->privateKey
) {
1029 if (ret
->priv_key
== NULL
)
1030 ret
->priv_key
= BN_secure_new();
1031 if (ret
->priv_key
== NULL
) {
1032 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1035 ret
->priv_key
= BN_bin2bn(ASN1_STRING_data(priv_key
->privateKey
),
1036 ASN1_STRING_length(priv_key
->privateKey
),
1038 if (ret
->priv_key
== NULL
) {
1039 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_BN_LIB
);
1043 ECerr(EC_F_D2I_ECPRIVATEKEY
, EC_R_MISSING_PRIVATE_KEY
);
1047 EC_POINT_clear_free(ret
->pub_key
);
1048 ret
->pub_key
= EC_POINT_new(ret
->group
);
1049 if (ret
->pub_key
== NULL
) {
1050 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1054 if (priv_key
->publicKey
) {
1055 const unsigned char *pub_oct
;
1058 pub_oct
= ASN1_STRING_data(priv_key
->publicKey
);
1059 pub_oct_len
= ASN1_STRING_length(priv_key
->publicKey
);
1061 * The first byte - point conversion form - must be present.
1063 if (pub_oct_len
<= 0) {
1064 ECerr(EC_F_D2I_ECPRIVATEKEY
, EC_R_BUFFER_TOO_SMALL
);
1067 /* Save the point conversion form. */
1068 ret
->conv_form
= (point_conversion_form_t
) (pub_oct
[0] & ~0x01);
1069 if (!EC_POINT_oct2point(ret
->group
, ret
->pub_key
,
1070 pub_oct
, (size_t)(pub_oct_len
), NULL
)) {
1071 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1076 (ret
->group
, ret
->pub_key
, ret
->priv_key
, NULL
, NULL
, NULL
)) {
1077 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1080 /* Remember the original private-key-only encoding. */
1081 ret
->enc_flag
|= EC_PKEY_NO_PUBKEY
;
1086 EC_PRIVATEKEY_free(priv_key
);
1091 if (a
== NULL
|| *a
!= ret
)
1093 EC_PRIVATEKEY_free(priv_key
);
1097 int i2d_ECPrivateKey(EC_KEY
*a
, unsigned char **out
)
1099 int ret
= 0, ok
= 0;
1100 unsigned char *buffer
= NULL
;
1101 size_t buf_len
= 0, tmp_len
, bn_len
;
1102 EC_PRIVATEKEY
*priv_key
= NULL
;
1104 if (a
== NULL
|| a
->group
== NULL
|| a
->priv_key
== NULL
||
1105 (!(a
->enc_flag
& EC_PKEY_NO_PUBKEY
) && a
->pub_key
== NULL
)) {
1106 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_PASSED_NULL_PARAMETER
);
1110 if ((priv_key
= EC_PRIVATEKEY_new()) == NULL
) {
1111 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1115 priv_key
->version
= a
->version
;
1117 bn_len
= (size_t)BN_num_bytes(a
->priv_key
);
1119 /* Octetstring may need leading zeros if BN is to short */
1121 buf_len
= (EC_GROUP_get_degree(a
->group
) + 7) / 8;
1123 if (bn_len
> buf_len
) {
1124 ECerr(EC_F_I2D_ECPRIVATEKEY
, EC_R_BUFFER_TOO_SMALL
);
1128 buffer
= OPENSSL_malloc(buf_len
);
1129 if (buffer
== NULL
) {
1130 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1134 if (!BN_bn2bin(a
->priv_key
, buffer
+ buf_len
- bn_len
)) {
1135 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_BN_LIB
);
1139 if (buf_len
- bn_len
> 0) {
1140 memset(buffer
, 0, buf_len
- bn_len
);
1143 if (!ASN1_OCTET_STRING_set(priv_key
->privateKey
, buffer
, buf_len
)) {
1144 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_ASN1_LIB
);
1148 if (!(a
->enc_flag
& EC_PKEY_NO_PARAMETERS
)) {
1149 if ((priv_key
->parameters
=
1150 ec_asn1_group2pkparameters(a
->group
,
1151 priv_key
->parameters
)) == NULL
) {
1152 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1157 if (!(a
->enc_flag
& EC_PKEY_NO_PUBKEY
)) {
1158 priv_key
->publicKey
= ASN1_BIT_STRING_new();
1159 if (priv_key
->publicKey
== NULL
) {
1160 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1164 tmp_len
= EC_POINT_point2oct(a
->group
, a
->pub_key
,
1165 a
->conv_form
, NULL
, 0, NULL
);
1167 if (tmp_len
> buf_len
) {
1168 unsigned char *tmp_buffer
= OPENSSL_realloc(buffer
, tmp_len
);
1170 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1173 buffer
= tmp_buffer
;
1177 if (!EC_POINT_point2oct(a
->group
, a
->pub_key
,
1178 a
->conv_form
, buffer
, buf_len
, NULL
)) {
1179 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1183 priv_key
->publicKey
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
| 0x07);
1184 priv_key
->publicKey
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
1185 if (!ASN1_BIT_STRING_set(priv_key
->publicKey
, buffer
, buf_len
)) {
1186 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_ASN1_LIB
);
1191 if ((ret
= i2d_EC_PRIVATEKEY(priv_key
, out
)) == 0) {
1192 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1197 OPENSSL_free(buffer
);
1198 EC_PRIVATEKEY_free(priv_key
);
1199 return (ok
? ret
: 0);
1202 int i2d_ECParameters(EC_KEY
*a
, unsigned char **out
)
1205 ECerr(EC_F_I2D_ECPARAMETERS
, ERR_R_PASSED_NULL_PARAMETER
);
1208 return i2d_ECPKParameters(a
->group
, out
);
1211 EC_KEY
*d2i_ECParameters(EC_KEY
**a
, const unsigned char **in
, long len
)
1215 if (in
== NULL
|| *in
== NULL
) {
1216 ECerr(EC_F_D2I_ECPARAMETERS
, ERR_R_PASSED_NULL_PARAMETER
);
1220 if (a
== NULL
|| *a
== NULL
) {
1221 if ((ret
= EC_KEY_new()) == NULL
) {
1222 ECerr(EC_F_D2I_ECPARAMETERS
, ERR_R_MALLOC_FAILURE
);
1228 if (!d2i_ECPKParameters(&ret
->group
, in
, len
)) {
1229 ECerr(EC_F_D2I_ECPARAMETERS
, ERR_R_EC_LIB
);
1230 if (a
== NULL
|| *a
!= ret
)
1241 EC_KEY
*o2i_ECPublicKey(EC_KEY
**a
, const unsigned char **in
, long len
)
1245 if (a
== NULL
|| (*a
) == NULL
|| (*a
)->group
== NULL
) {
1247 * sorry, but a EC_GROUP-structur is necessary to set the public key
1249 ECerr(EC_F_O2I_ECPUBLICKEY
, ERR_R_PASSED_NULL_PARAMETER
);
1253 if (ret
->pub_key
== NULL
&&
1254 (ret
->pub_key
= EC_POINT_new(ret
->group
)) == NULL
) {
1255 ECerr(EC_F_O2I_ECPUBLICKEY
, ERR_R_MALLOC_FAILURE
);
1258 if (!EC_POINT_oct2point(ret
->group
, ret
->pub_key
, *in
, len
, NULL
)) {
1259 ECerr(EC_F_O2I_ECPUBLICKEY
, ERR_R_EC_LIB
);
1262 /* save the point conversion form */
1263 ret
->conv_form
= (point_conversion_form_t
) (*in
[0] & ~0x01);
1268 int i2o_ECPublicKey(EC_KEY
*a
, unsigned char **out
)
1274 ECerr(EC_F_I2O_ECPUBLICKEY
, ERR_R_PASSED_NULL_PARAMETER
);
1278 buf_len
= EC_POINT_point2oct(a
->group
, a
->pub_key
,
1279 a
->conv_form
, NULL
, 0, NULL
);
1281 if (out
== NULL
|| buf_len
== 0)
1282 /* out == NULL => just return the length of the octet string */
1286 if ((*out
= OPENSSL_malloc(buf_len
)) == NULL
) {
1287 ECerr(EC_F_I2O_ECPUBLICKEY
, ERR_R_MALLOC_FAILURE
);
1292 if (!EC_POINT_point2oct(a
->group
, a
->pub_key
, a
->conv_form
,
1293 *out
, buf_len
, NULL
)) {
1294 ECerr(EC_F_I2O_ECPUBLICKEY
, ERR_R_EC_LIB
);
1306 ASN1_SEQUENCE(ECDSA_SIG
) = {
1307 ASN1_SIMPLE(ECDSA_SIG
, r
, CBIGNUM
),
1308 ASN1_SIMPLE(ECDSA_SIG
, s
, CBIGNUM
)
1309 } static_ASN1_SEQUENCE_END(ECDSA_SIG
)
1311 DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG
)
1312 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG
, ECDSA_SIG
)
1313 IMPLEMENT_ASN1_FUNCTIONS_const(ECDSA_SIG
)
1315 void ECDSA_SIG_get0(BIGNUM
**pr
, BIGNUM
**ps
, ECDSA_SIG
*sig
)
1323 int ECDSA_size(const EC_KEY
*r
)
1327 BIGNUM
*order
= NULL
;
1328 unsigned char buf
[4];
1329 const EC_GROUP
*group
;
1333 group
= EC_KEY_get0_group(r
);
1337 if ((order
= BN_new()) == NULL
)
1339 if (!EC_GROUP_get_order(group
, order
, NULL
)) {
1340 BN_clear_free(order
);
1343 i
= BN_num_bits(order
);
1344 bs
.length
= (i
+ 7) / 8;
1346 bs
.type
= V_ASN1_INTEGER
;
1347 /* If the top bit is set the asn1 encoding is 1 larger. */
1350 i
= i2d_ASN1_INTEGER(&bs
, NULL
);
1351 i
+= i
; /* r and s */
1352 ret
= ASN1_object_size(1, i
, V_ASN1_SEQUENCE
);
1353 BN_clear_free(order
);