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 } 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 } 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 } 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 } 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 } 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 } 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 } 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 if (field
->fieldType
!= NULL
)
321 ASN1_OBJECT_free(field
->fieldType
);
322 if (field
->p
.other
!= NULL
)
323 ASN1_TYPE_free(field
->p
.other
);
325 nid
= EC_METHOD_get_field_type(EC_GROUP_method_of(group
));
326 /* set OID for the field */
327 if ((field
->fieldType
= OBJ_nid2obj(nid
)) == NULL
) {
328 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_OBJ_LIB
);
332 if (nid
== NID_X9_62_prime_field
) {
333 if ((tmp
= BN_new()) == NULL
) {
334 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
337 /* the parameters are specified by the prime number p */
338 if (!EC_GROUP_get_curve_GFp(group
, tmp
, NULL
, NULL
, NULL
)) {
339 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_EC_LIB
);
342 /* set the prime number */
343 field
->p
.prime
= BN_to_ASN1_INTEGER(tmp
, NULL
);
344 if (field
->p
.prime
== NULL
) {
345 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_ASN1_LIB
);
348 } else /* nid == NID_X9_62_characteristic_two_field */
349 #ifdef OPENSSL_NO_EC2M
351 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, EC_R_GF2M_NOT_SUPPORTED
);
357 X9_62_CHARACTERISTIC_TWO
*char_two
;
359 field
->p
.char_two
= X9_62_CHARACTERISTIC_TWO_new();
360 char_two
= field
->p
.char_two
;
362 if (char_two
== NULL
) {
363 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
367 char_two
->m
= (long)EC_GROUP_get_degree(group
);
369 field_type
= EC_GROUP_get_basis_type(group
);
371 if (field_type
== 0) {
372 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_EC_LIB
);
375 /* set base type OID */
376 if ((char_two
->type
= OBJ_nid2obj(field_type
)) == NULL
) {
377 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_OBJ_LIB
);
381 if (field_type
== NID_X9_62_tpBasis
) {
384 if (!EC_GROUP_get_trinomial_basis(group
, &k
))
387 char_two
->p
.tpBasis
= ASN1_INTEGER_new();
388 if (!char_two
->p
.tpBasis
) {
389 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
392 if (!ASN1_INTEGER_set(char_two
->p
.tpBasis
, (long)k
)) {
393 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_ASN1_LIB
);
396 } else if (field_type
== NID_X9_62_ppBasis
) {
397 unsigned int k1
, k2
, k3
;
399 if (!EC_GROUP_get_pentanomial_basis(group
, &k1
, &k2
, &k3
))
402 char_two
->p
.ppBasis
= X9_62_PENTANOMIAL_new();
403 if (!char_two
->p
.ppBasis
) {
404 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
409 char_two
->p
.ppBasis
->k1
= (long)k1
;
410 char_two
->p
.ppBasis
->k2
= (long)k2
;
411 char_two
->p
.ppBasis
->k3
= (long)k3
;
412 } else { /* field_type == NID_X9_62_onBasis */
414 /* for ONB the parameters are (asn1) NULL */
415 char_two
->p
.onBasis
= ASN1_NULL_new();
416 if (!char_two
->p
.onBasis
) {
417 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
431 static int ec_asn1_group2curve(const EC_GROUP
*group
, X9_62_CURVE
*curve
)
434 BIGNUM
*tmp_1
= NULL
, *tmp_2
= NULL
;
435 unsigned char *buffer_1
= NULL
, *buffer_2
= NULL
,
436 *a_buf
= NULL
, *b_buf
= NULL
;
438 unsigned char char_zero
= 0;
440 if (!group
|| !curve
|| !curve
->a
|| !curve
->b
)
443 if ((tmp_1
= BN_new()) == NULL
|| (tmp_2
= BN_new()) == NULL
) {
444 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
448 nid
= EC_METHOD_get_field_type(EC_GROUP_method_of(group
));
451 if (nid
== NID_X9_62_prime_field
) {
452 if (!EC_GROUP_get_curve_GFp(group
, NULL
, tmp_1
, tmp_2
, NULL
)) {
453 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_EC_LIB
);
457 #ifndef OPENSSL_NO_EC2M
458 else { /* nid == NID_X9_62_characteristic_two_field */
460 if (!EC_GROUP_get_curve_GF2m(group
, NULL
, tmp_1
, tmp_2
, NULL
)) {
461 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_EC_LIB
);
466 len_1
= (size_t)BN_num_bytes(tmp_1
);
467 len_2
= (size_t)BN_num_bytes(tmp_2
);
470 /* len_1 == 0 => a == 0 */
474 if ((buffer_1
= OPENSSL_malloc(len_1
)) == NULL
) {
475 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
478 if ((len_1
= BN_bn2bin(tmp_1
, buffer_1
)) == 0) {
479 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_BN_LIB
);
486 /* len_2 == 0 => b == 0 */
490 if ((buffer_2
= OPENSSL_malloc(len_2
)) == NULL
) {
491 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
494 if ((len_2
= BN_bn2bin(tmp_2
, buffer_2
)) == 0) {
495 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_BN_LIB
);
502 if (!M_ASN1_OCTET_STRING_set(curve
->a
, a_buf
, len_1
) ||
503 !M_ASN1_OCTET_STRING_set(curve
->b
, b_buf
, len_2
)) {
504 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_ASN1_LIB
);
508 /* set the seed (optional) */
511 if ((curve
->seed
= ASN1_BIT_STRING_new()) == NULL
) {
512 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
515 curve
->seed
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
| 0x07);
516 curve
->seed
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
517 if (!ASN1_BIT_STRING_set(curve
->seed
, group
->seed
,
518 (int)group
->seed_len
)) {
519 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_ASN1_LIB
);
524 ASN1_BIT_STRING_free(curve
->seed
);
532 OPENSSL_free(buffer_1
);
534 OPENSSL_free(buffer_2
);
542 static ECPARAMETERS
*ec_asn1_group2parameters(const EC_GROUP
*group
,
547 ECPARAMETERS
*ret
= NULL
;
549 unsigned char *buffer
= NULL
;
550 const EC_POINT
*point
= NULL
;
551 point_conversion_form_t form
;
553 if ((tmp
= BN_new()) == NULL
) {
554 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_MALLOC_FAILURE
);
559 if ((ret
= ECPARAMETERS_new()) == NULL
) {
560 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_MALLOC_FAILURE
);
566 /* set the version (always one) */
567 ret
->version
= (long)0x1;
569 /* set the fieldID */
570 if (!ec_asn1_group2fieldid(group
, ret
->fieldID
)) {
571 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_EC_LIB
);
576 if (!ec_asn1_group2curve(group
, ret
->curve
)) {
577 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_EC_LIB
);
581 /* set the base point */
582 if ((point
= EC_GROUP_get0_generator(group
)) == NULL
) {
583 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, EC_R_UNDEFINED_GENERATOR
);
587 form
= EC_GROUP_get_point_conversion_form(group
);
589 len
= EC_POINT_point2oct(group
, point
, form
, NULL
, len
, NULL
);
591 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_EC_LIB
);
594 if ((buffer
= OPENSSL_malloc(len
)) == NULL
) {
595 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_MALLOC_FAILURE
);
598 if (!EC_POINT_point2oct(group
, point
, form
, buffer
, len
, NULL
)) {
599 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_EC_LIB
);
602 if (ret
->base
== NULL
&& (ret
->base
= ASN1_OCTET_STRING_new()) == NULL
) {
603 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_MALLOC_FAILURE
);
606 if (!ASN1_OCTET_STRING_set(ret
->base
, buffer
, len
)) {
607 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_ASN1_LIB
);
612 if (!EC_GROUP_get_order(group
, tmp
, NULL
)) {
613 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_EC_LIB
);
616 ret
->order
= BN_to_ASN1_INTEGER(tmp
, ret
->order
);
617 if (ret
->order
== NULL
) {
618 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_ASN1_LIB
);
622 /* set the cofactor (optional) */
623 if (EC_GROUP_get_cofactor(group
, tmp
, NULL
)) {
624 ret
->cofactor
= BN_to_ASN1_INTEGER(tmp
, ret
->cofactor
);
625 if (ret
->cofactor
== NULL
) {
626 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS
, ERR_R_ASN1_LIB
);
635 ECPARAMETERS_free(ret
);
641 OPENSSL_free(buffer
);
645 ECPKPARAMETERS
*ec_asn1_group2pkparameters(const EC_GROUP
*group
,
646 ECPKPARAMETERS
*params
)
649 ECPKPARAMETERS
*ret
= params
;
652 if ((ret
= ECPKPARAMETERS_new()) == NULL
) {
653 ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS
, ERR_R_MALLOC_FAILURE
);
657 if (ret
->type
== 0 && ret
->value
.named_curve
)
658 ASN1_OBJECT_free(ret
->value
.named_curve
);
659 else if (ret
->type
== 1 && ret
->value
.parameters
)
660 ECPARAMETERS_free(ret
->value
.parameters
);
663 if (EC_GROUP_get_asn1_flag(group
)) {
665 * use the asn1 OID to describe the the elliptic curve parameters
667 tmp
= EC_GROUP_get_curve_name(group
);
670 if ((ret
->value
.named_curve
= OBJ_nid2obj(tmp
)) == NULL
)
673 /* we don't kmow the nid => ERROR */
676 /* use the ECPARAMETERS structure */
678 if ((ret
->value
.parameters
=
679 ec_asn1_group2parameters(group
, NULL
)) == NULL
)
684 ECPKPARAMETERS_free(ret
);
690 static EC_GROUP
*ec_asn1_parameters2group(const ECPARAMETERS
*params
)
693 EC_GROUP
*ret
= NULL
;
694 BIGNUM
*p
= NULL
, *a
= NULL
, *b
= NULL
;
695 EC_POINT
*point
= NULL
;
698 if (!params
->fieldID
|| !params
->fieldID
->fieldType
||
699 !params
->fieldID
->p
.ptr
) {
700 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
704 /* now extract the curve parameters a and b */
705 if (!params
->curve
|| !params
->curve
->a
||
706 !params
->curve
->a
->data
|| !params
->curve
->b
||
707 !params
->curve
->b
->data
) {
708 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
711 a
= BN_bin2bn(params
->curve
->a
->data
, params
->curve
->a
->length
, NULL
);
713 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_BN_LIB
);
716 b
= BN_bin2bn(params
->curve
->b
->data
, params
->curve
->b
->length
, NULL
);
718 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_BN_LIB
);
722 /* get the field parameters */
723 tmp
= OBJ_obj2nid(params
->fieldID
->fieldType
);
724 if (tmp
== NID_X9_62_characteristic_two_field
)
725 #ifdef OPENSSL_NO_EC2M
727 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_GF2M_NOT_SUPPORTED
);
732 X9_62_CHARACTERISTIC_TWO
*char_two
;
734 char_two
= params
->fieldID
->p
.char_two
;
736 field_bits
= char_two
->m
;
737 if (field_bits
> OPENSSL_ECC_MAX_FIELD_BITS
) {
738 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_FIELD_TOO_LARGE
);
742 if ((p
= BN_new()) == NULL
) {
743 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_MALLOC_FAILURE
);
747 /* get the base type */
748 tmp
= OBJ_obj2nid(char_two
->type
);
750 if (tmp
== NID_X9_62_tpBasis
) {
753 if (!char_two
->p
.tpBasis
) {
754 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
758 tmp_long
= ASN1_INTEGER_get(char_two
->p
.tpBasis
);
760 if (!(char_two
->m
> tmp_long
&& tmp_long
> 0)) {
761 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
,
762 EC_R_INVALID_TRINOMIAL_BASIS
);
766 /* create the polynomial */
767 if (!BN_set_bit(p
, (int)char_two
->m
))
769 if (!BN_set_bit(p
, (int)tmp_long
))
771 if (!BN_set_bit(p
, 0))
773 } else if (tmp
== NID_X9_62_ppBasis
) {
774 X9_62_PENTANOMIAL
*penta
;
776 penta
= char_two
->p
.ppBasis
;
778 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
783 (char_two
->m
> penta
->k3
&& penta
->k3
> penta
->k2
784 && penta
->k2
> penta
->k1
&& penta
->k1
> 0)) {
785 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
,
786 EC_R_INVALID_PENTANOMIAL_BASIS
);
790 /* create the polynomial */
791 if (!BN_set_bit(p
, (int)char_two
->m
))
793 if (!BN_set_bit(p
, (int)penta
->k1
))
795 if (!BN_set_bit(p
, (int)penta
->k2
))
797 if (!BN_set_bit(p
, (int)penta
->k3
))
799 if (!BN_set_bit(p
, 0))
801 } else if (tmp
== NID_X9_62_onBasis
) {
802 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_NOT_IMPLEMENTED
);
806 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
810 /* create the EC_GROUP structure */
811 ret
= EC_GROUP_new_curve_GF2m(p
, a
, b
, NULL
);
814 else if (tmp
== NID_X9_62_prime_field
) {
815 /* we have a curve over a prime field */
816 /* extract the prime number */
817 if (!params
->fieldID
->p
.prime
) {
818 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
821 p
= ASN1_INTEGER_to_BN(params
->fieldID
->p
.prime
, NULL
);
823 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_ASN1_LIB
);
827 if (BN_is_negative(p
) || BN_is_zero(p
)) {
828 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_INVALID_FIELD
);
832 field_bits
= BN_num_bits(p
);
833 if (field_bits
> OPENSSL_ECC_MAX_FIELD_BITS
) {
834 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_FIELD_TOO_LARGE
);
838 /* create the EC_GROUP structure */
839 ret
= EC_GROUP_new_curve_GFp(p
, a
, b
, NULL
);
841 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_INVALID_FIELD
);
846 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_EC_LIB
);
850 /* extract seed (optional) */
851 if (params
->curve
->seed
!= NULL
) {
852 if (ret
->seed
!= NULL
)
853 OPENSSL_free(ret
->seed
);
854 if (!(ret
->seed
= OPENSSL_malloc(params
->curve
->seed
->length
))) {
855 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_MALLOC_FAILURE
);
858 memcpy(ret
->seed
, params
->curve
->seed
->data
,
859 params
->curve
->seed
->length
);
860 ret
->seed_len
= params
->curve
->seed
->length
;
863 if (!params
->order
|| !params
->base
|| !params
->base
->data
) {
864 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
868 if ((point
= EC_POINT_new(ret
)) == NULL
)
871 /* set the point conversion form */
872 EC_GROUP_set_point_conversion_form(ret
, (point_conversion_form_t
)
873 (params
->base
->data
[0] & ~0x01));
875 /* extract the ec point */
876 if (!EC_POINT_oct2point(ret
, point
, params
->base
->data
,
877 params
->base
->length
, NULL
)) {
878 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_EC_LIB
);
882 /* extract the order */
883 if ((a
= ASN1_INTEGER_to_BN(params
->order
, a
)) == NULL
) {
884 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_ASN1_LIB
);
887 if (BN_is_negative(a
) || BN_is_zero(a
)) {
888 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_INVALID_GROUP_ORDER
);
891 if (BN_num_bits(a
) > (int)field_bits
+ 1) { /* Hasse bound */
892 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, EC_R_INVALID_GROUP_ORDER
);
896 /* extract the cofactor (optional) */
897 if (params
->cofactor
== NULL
) {
902 } else if ((b
= ASN1_INTEGER_to_BN(params
->cofactor
, b
)) == NULL
) {
903 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_ASN1_LIB
);
906 /* set the generator, order and cofactor (if present) */
907 if (!EC_GROUP_set_generator(ret
, point
, a
, b
)) {
908 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP
, ERR_R_EC_LIB
);
916 EC_GROUP_clear_free(ret
);
927 EC_POINT_free(point
);
931 EC_GROUP
*ec_asn1_pkparameters2group(const ECPKPARAMETERS
*params
)
933 EC_GROUP
*ret
= NULL
;
936 if (params
== NULL
) {
937 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP
, EC_R_MISSING_PARAMETERS
);
941 if (params
->type
== 0) { /* the curve is given by an OID */
942 tmp
= OBJ_obj2nid(params
->value
.named_curve
);
943 if ((ret
= EC_GROUP_new_by_curve_name(tmp
)) == NULL
) {
944 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP
,
945 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE
);
948 EC_GROUP_set_asn1_flag(ret
, OPENSSL_EC_NAMED_CURVE
);
949 } else if (params
->type
== 1) { /* the parameters are given by a
950 * ECPARAMETERS structure */
951 ret
= ec_asn1_parameters2group(params
->value
.parameters
);
953 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP
, ERR_R_EC_LIB
);
956 EC_GROUP_set_asn1_flag(ret
, 0x0);
957 } else if (params
->type
== 2) { /* implicitlyCA */
960 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP
, EC_R_ASN1_ERROR
);
967 /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
969 EC_GROUP
*d2i_ECPKParameters(EC_GROUP
**a
, const unsigned char **in
, long len
)
971 EC_GROUP
*group
= NULL
;
972 ECPKPARAMETERS
*params
= NULL
;
973 const unsigned char *p
= *in
;
975 if ((params
= d2i_ECPKPARAMETERS(NULL
, &p
, len
)) == NULL
) {
976 ECerr(EC_F_D2I_ECPKPARAMETERS
, EC_R_D2I_ECPKPARAMETERS_FAILURE
);
977 ECPKPARAMETERS_free(params
);
981 if ((group
= ec_asn1_pkparameters2group(params
)) == NULL
) {
982 ECerr(EC_F_D2I_ECPKPARAMETERS
, EC_R_PKPARAMETERS2GROUP_FAILURE
);
983 ECPKPARAMETERS_free(params
);
988 EC_GROUP_clear_free(*a
);
992 ECPKPARAMETERS_free(params
);
997 int i2d_ECPKParameters(const EC_GROUP
*a
, unsigned char **out
)
1000 ECPKPARAMETERS
*tmp
= ec_asn1_group2pkparameters(a
, NULL
);
1002 ECerr(EC_F_I2D_ECPKPARAMETERS
, EC_R_GROUP2PKPARAMETERS_FAILURE
);
1005 if ((ret
= i2d_ECPKPARAMETERS(tmp
, out
)) == 0) {
1006 ECerr(EC_F_I2D_ECPKPARAMETERS
, EC_R_I2D_ECPKPARAMETERS_FAILURE
);
1007 ECPKPARAMETERS_free(tmp
);
1010 ECPKPARAMETERS_free(tmp
);
1014 /* some EC_KEY functions */
1016 EC_KEY
*d2i_ECPrivateKey(EC_KEY
**a
, const unsigned char **in
, long len
)
1020 EC_PRIVATEKEY
*priv_key
= NULL
;
1021 const unsigned char *p
= *in
;
1023 if ((priv_key
= d2i_EC_PRIVATEKEY(NULL
, &p
, len
)) == NULL
) {
1024 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1028 if (a
== NULL
|| *a
== NULL
) {
1029 if ((ret
= EC_KEY_new()) == NULL
) {
1030 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1036 if (priv_key
->parameters
) {
1038 EC_GROUP_clear_free(ret
->group
);
1039 ret
->group
= ec_asn1_pkparameters2group(priv_key
->parameters
);
1042 if (ret
->group
== NULL
) {
1043 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1047 ret
->version
= priv_key
->version
;
1049 if (priv_key
->privateKey
) {
1050 ret
->priv_key
= BN_bin2bn(M_ASN1_STRING_data(priv_key
->privateKey
),
1051 M_ASN1_STRING_length(priv_key
->privateKey
),
1053 if (ret
->priv_key
== NULL
) {
1054 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_BN_LIB
);
1058 ECerr(EC_F_D2I_ECPRIVATEKEY
, EC_R_MISSING_PRIVATE_KEY
);
1063 EC_POINT_clear_free(ret
->pub_key
);
1064 ret
->pub_key
= EC_POINT_new(ret
->group
);
1065 if (ret
->pub_key
== NULL
) {
1066 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1070 if (priv_key
->publicKey
) {
1071 const unsigned char *pub_oct
;
1074 pub_oct
= M_ASN1_STRING_data(priv_key
->publicKey
);
1075 pub_oct_len
= M_ASN1_STRING_length(priv_key
->publicKey
);
1077 * The first byte - point conversion form - must be present.
1079 if (pub_oct_len
<= 0) {
1080 ECerr(EC_F_D2I_ECPRIVATEKEY
, EC_R_BUFFER_TOO_SMALL
);
1083 /* Save the point conversion form. */
1084 ret
->conv_form
= (point_conversion_form_t
) (pub_oct
[0] & ~0x01);
1085 if (!EC_POINT_oct2point(ret
->group
, ret
->pub_key
,
1086 pub_oct
, (size_t)(pub_oct_len
), NULL
)) {
1087 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1092 (ret
->group
, ret
->pub_key
, ret
->priv_key
, NULL
, NULL
, NULL
)) {
1093 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1096 /* Remember the original private-key-only encoding. */
1097 ret
->enc_flag
|= EC_PKEY_NO_PUBKEY
;
1106 if (ret
&& (a
== NULL
|| *a
!= ret
))
1112 EC_PRIVATEKEY_free(priv_key
);
1117 int i2d_ECPrivateKey(EC_KEY
*a
, unsigned char **out
)
1119 int ret
= 0, ok
= 0;
1120 unsigned char *buffer
= NULL
;
1121 size_t buf_len
= 0, tmp_len
, bn_len
;
1122 EC_PRIVATEKEY
*priv_key
= NULL
;
1124 if (a
== NULL
|| a
->group
== NULL
|| a
->priv_key
== NULL
||
1125 (!(a
->enc_flag
& EC_PKEY_NO_PUBKEY
) && a
->pub_key
== NULL
)) {
1126 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_PASSED_NULL_PARAMETER
);
1130 if ((priv_key
= EC_PRIVATEKEY_new()) == NULL
) {
1131 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1135 priv_key
->version
= a
->version
;
1137 bn_len
= (size_t)BN_num_bytes(a
->priv_key
);
1139 /* Octetstring may need leading zeros if BN is to short */
1141 buf_len
= (EC_GROUP_get_degree(a
->group
) + 7) / 8;
1143 if (bn_len
> buf_len
) {
1144 ECerr(EC_F_I2D_ECPRIVATEKEY
, EC_R_BUFFER_TOO_SMALL
);
1148 buffer
= OPENSSL_malloc(buf_len
);
1149 if (buffer
== NULL
) {
1150 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1154 if (!BN_bn2bin(a
->priv_key
, buffer
+ buf_len
- bn_len
)) {
1155 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_BN_LIB
);
1159 if (buf_len
- bn_len
> 0) {
1160 memset(buffer
, 0, buf_len
- bn_len
);
1163 if (!M_ASN1_OCTET_STRING_set(priv_key
->privateKey
, buffer
, buf_len
)) {
1164 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_ASN1_LIB
);
1168 if (!(a
->enc_flag
& EC_PKEY_NO_PARAMETERS
)) {
1169 if ((priv_key
->parameters
=
1170 ec_asn1_group2pkparameters(a
->group
,
1171 priv_key
->parameters
)) == NULL
) {
1172 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1177 if (!(a
->enc_flag
& EC_PKEY_NO_PUBKEY
)) {
1178 priv_key
->publicKey
= M_ASN1_BIT_STRING_new();
1179 if (priv_key
->publicKey
== NULL
) {
1180 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1184 tmp_len
= EC_POINT_point2oct(a
->group
, a
->pub_key
,
1185 a
->conv_form
, NULL
, 0, NULL
);
1187 if (tmp_len
> buf_len
) {
1188 unsigned char *tmp_buffer
= OPENSSL_realloc(buffer
, tmp_len
);
1190 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1193 buffer
= tmp_buffer
;
1197 if (!EC_POINT_point2oct(a
->group
, a
->pub_key
,
1198 a
->conv_form
, buffer
, buf_len
, NULL
)) {
1199 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1203 priv_key
->publicKey
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
| 0x07);
1204 priv_key
->publicKey
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
1205 if (!M_ASN1_BIT_STRING_set(priv_key
->publicKey
, buffer
, buf_len
)) {
1206 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_ASN1_LIB
);
1211 if ((ret
= i2d_EC_PRIVATEKEY(priv_key
, out
)) == 0) {
1212 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1218 OPENSSL_free(buffer
);
1220 EC_PRIVATEKEY_free(priv_key
);
1221 return (ok
? ret
: 0);
1224 int i2d_ECParameters(EC_KEY
*a
, unsigned char **out
)
1227 ECerr(EC_F_I2D_ECPARAMETERS
, ERR_R_PASSED_NULL_PARAMETER
);
1230 return i2d_ECPKParameters(a
->group
, out
);
1233 EC_KEY
*d2i_ECParameters(EC_KEY
**a
, const unsigned char **in
, long len
)
1237 if (in
== NULL
|| *in
== NULL
) {
1238 ECerr(EC_F_D2I_ECPARAMETERS
, ERR_R_PASSED_NULL_PARAMETER
);
1242 if (a
== NULL
|| *a
== NULL
) {
1243 if ((ret
= EC_KEY_new()) == NULL
) {
1244 ECerr(EC_F_D2I_ECPARAMETERS
, ERR_R_MALLOC_FAILURE
);
1250 if (!d2i_ECPKParameters(&ret
->group
, in
, len
)) {
1251 ECerr(EC_F_D2I_ECPARAMETERS
, ERR_R_EC_LIB
);
1252 if (a
== NULL
|| *a
!= ret
)
1263 EC_KEY
*o2i_ECPublicKey(EC_KEY
**a
, const unsigned char **in
, long len
)
1267 if (a
== NULL
|| (*a
) == NULL
|| (*a
)->group
== NULL
) {
1269 * sorry, but a EC_GROUP-structur is necessary to set the public key
1271 ECerr(EC_F_O2I_ECPUBLICKEY
, ERR_R_PASSED_NULL_PARAMETER
);
1275 if (ret
->pub_key
== NULL
&&
1276 (ret
->pub_key
= EC_POINT_new(ret
->group
)) == NULL
) {
1277 ECerr(EC_F_O2I_ECPUBLICKEY
, ERR_R_MALLOC_FAILURE
);
1280 if (!EC_POINT_oct2point(ret
->group
, ret
->pub_key
, *in
, len
, NULL
)) {
1281 ECerr(EC_F_O2I_ECPUBLICKEY
, ERR_R_EC_LIB
);
1284 /* save the point conversion form */
1285 ret
->conv_form
= (point_conversion_form_t
) (*in
[0] & ~0x01);
1290 int i2o_ECPublicKey(EC_KEY
*a
, unsigned char **out
)
1296 ECerr(EC_F_I2O_ECPUBLICKEY
, ERR_R_PASSED_NULL_PARAMETER
);
1300 buf_len
= EC_POINT_point2oct(a
->group
, a
->pub_key
,
1301 a
->conv_form
, NULL
, 0, NULL
);
1303 if (out
== NULL
|| buf_len
== 0)
1304 /* out == NULL => just return the length of the octet string */
1308 if ((*out
= OPENSSL_malloc(buf_len
)) == NULL
) {
1309 ECerr(EC_F_I2O_ECPUBLICKEY
, ERR_R_MALLOC_FAILURE
);
1314 if (!EC_POINT_point2oct(a
->group
, a
->pub_key
, a
->conv_form
,
1315 *out
, buf_len
, NULL
)) {
1316 ECerr(EC_F_I2O_ECPUBLICKEY
, ERR_R_EC_LIB
);