2 * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
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
12 #include <openssl/err.h>
13 #include <openssl/asn1t.h>
14 #include <openssl/objects.h>
15 #include "internal/nelem.h"
17 int EC_GROUP_get_basis_type(const EC_GROUP
*group
)
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 */
26 /* Find the last non-zero element of group->poly[] */
28 i
< (int)OSSL_NELEM(group
->poly
) && group
->poly
[i
] != 0;
33 return NID_X9_62_ppBasis
;
35 return NID_X9_62_tpBasis
;
37 /* everything else is currently not supported */
41 #ifndef OPENSSL_NO_EC2M
42 int EC_GROUP_get_trinomial_basis(const EC_GROUP
*group
, unsigned int *k
)
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
);
62 int EC_GROUP_get_pentanomial_basis(const EC_GROUP
*group
, unsigned int *k1
,
63 unsigned int *k2
, unsigned int *k3
)
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
);
89 /* some structures needed for the asn1 encoding */
90 typedef struct x9_62_pentanomial_st
{
96 typedef struct x9_62_characteristic_two_st
{
101 /* NID_X9_62_onBasis */
103 /* NID_X9_62_tpBasis */
104 ASN1_INTEGER
*tpBasis
;
105 /* NID_X9_62_ppBasis */
106 X9_62_PENTANOMIAL
*ppBasis
;
110 } X9_62_CHARACTERISTIC_TWO
;
112 typedef struct x9_62_fieldid_st
{
113 ASN1_OBJECT
*fieldType
;
116 /* NID_X9_62_prime_field */
118 /* NID_X9_62_characteristic_two_field */
119 X9_62_CHARACTERISTIC_TWO
*char_two
;
125 typedef struct x9_62_curve_st
{
126 ASN1_OCTET_STRING
*a
;
127 ASN1_OCTET_STRING
*b
;
128 ASN1_BIT_STRING
*seed
;
131 struct ec_parameters_st
{
133 X9_62_FIELDID
*fieldID
;
135 ASN1_OCTET_STRING
*base
;
137 ASN1_INTEGER
*cofactor
;
138 } /* ECPARAMETERS */ ;
140 struct ecpk_parameters_st
{
143 ASN1_OBJECT
*named_curve
;
144 ECPARAMETERS
*parameters
;
145 ASN1_NULL
*implicitlyCA
;
147 } /* ECPKPARAMETERS */ ;
149 /* SEC1 ECPrivateKey */
150 typedef struct ec_privatekey_st
{
152 ASN1_OCTET_STRING
*privateKey
;
153 ECPKPARAMETERS
*parameters
;
154 ASN1_BIT_STRING
*publicKey
;
157 /* the OpenSSL ASN.1 definitions */
158 ASN1_SEQUENCE(X9_62_PENTANOMIAL
) = {
159 ASN1_EMBED(X9_62_PENTANOMIAL
, k1
, INT32
),
160 ASN1_EMBED(X9_62_PENTANOMIAL
, k2
, INT32
),
161 ASN1_EMBED(X9_62_PENTANOMIAL
, k3
, INT32
)
162 } static_ASN1_SEQUENCE_END(X9_62_PENTANOMIAL
)
164 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL
)
165 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL
)
167 ASN1_ADB_TEMPLATE(char_two_def
) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, p
.other
, ASN1_ANY
);
169 ASN1_ADB(X9_62_CHARACTERISTIC_TWO
) = {
170 ADB_ENTRY(NID_X9_62_onBasis
, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, p
.onBasis
, ASN1_NULL
)),
171 ADB_ENTRY(NID_X9_62_tpBasis
, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, p
.tpBasis
, ASN1_INTEGER
)),
172 ADB_ENTRY(NID_X9_62_ppBasis
, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, p
.ppBasis
, X9_62_PENTANOMIAL
))
173 } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO
, 0, type
, 0, &char_two_def_tt
, NULL
);
175 ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO
) = {
176 ASN1_EMBED(X9_62_CHARACTERISTIC_TWO
, m
, INT32
),
177 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, type
, ASN1_OBJECT
),
178 ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO
)
179 } static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO
)
181 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO
)
182 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO
)
184 ASN1_ADB_TEMPLATE(fieldID_def
) = ASN1_SIMPLE(X9_62_FIELDID
, p
.other
, ASN1_ANY
);
186 ASN1_ADB(X9_62_FIELDID
) = {
187 ADB_ENTRY(NID_X9_62_prime_field
, ASN1_SIMPLE(X9_62_FIELDID
, p
.prime
, ASN1_INTEGER
)),
188 ADB_ENTRY(NID_X9_62_characteristic_two_field
, ASN1_SIMPLE(X9_62_FIELDID
, p
.char_two
, X9_62_CHARACTERISTIC_TWO
))
189 } ASN1_ADB_END(X9_62_FIELDID
, 0, fieldType
, 0, &fieldID_def_tt
, NULL
);
191 ASN1_SEQUENCE(X9_62_FIELDID
) = {
192 ASN1_SIMPLE(X9_62_FIELDID
, fieldType
, ASN1_OBJECT
),
193 ASN1_ADB_OBJECT(X9_62_FIELDID
)
194 } static_ASN1_SEQUENCE_END(X9_62_FIELDID
)
196 ASN1_SEQUENCE(X9_62_CURVE
) = {
197 ASN1_SIMPLE(X9_62_CURVE
, a
, ASN1_OCTET_STRING
),
198 ASN1_SIMPLE(X9_62_CURVE
, b
, ASN1_OCTET_STRING
),
199 ASN1_OPT(X9_62_CURVE
, seed
, ASN1_BIT_STRING
)
200 } static_ASN1_SEQUENCE_END(X9_62_CURVE
)
202 ASN1_SEQUENCE(ECPARAMETERS
) = {
203 ASN1_EMBED(ECPARAMETERS
, version
, INT32
),
204 ASN1_SIMPLE(ECPARAMETERS
, fieldID
, X9_62_FIELDID
),
205 ASN1_SIMPLE(ECPARAMETERS
, curve
, X9_62_CURVE
),
206 ASN1_SIMPLE(ECPARAMETERS
, base
, ASN1_OCTET_STRING
),
207 ASN1_SIMPLE(ECPARAMETERS
, order
, ASN1_INTEGER
),
208 ASN1_OPT(ECPARAMETERS
, cofactor
, ASN1_INTEGER
)
209 } ASN1_SEQUENCE_END(ECPARAMETERS
)
211 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS
)
212 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS
)
214 ASN1_CHOICE(ECPKPARAMETERS
) = {
215 ASN1_SIMPLE(ECPKPARAMETERS
, value
.named_curve
, ASN1_OBJECT
),
216 ASN1_SIMPLE(ECPKPARAMETERS
, value
.parameters
, ECPARAMETERS
),
217 ASN1_SIMPLE(ECPKPARAMETERS
, value
.implicitlyCA
, ASN1_NULL
)
218 } ASN1_CHOICE_END(ECPKPARAMETERS
)
220 DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS
)
221 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS
, ECPKPARAMETERS
)
222 IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS
)
224 ASN1_SEQUENCE(EC_PRIVATEKEY
) = {
225 ASN1_EMBED(EC_PRIVATEKEY
, version
, INT32
),
226 ASN1_SIMPLE(EC_PRIVATEKEY
, privateKey
, ASN1_OCTET_STRING
),
227 ASN1_EXP_OPT(EC_PRIVATEKEY
, parameters
, ECPKPARAMETERS
, 0),
228 ASN1_EXP_OPT(EC_PRIVATEKEY
, publicKey
, ASN1_BIT_STRING
, 1)
229 } static_ASN1_SEQUENCE_END(EC_PRIVATEKEY
)
231 DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY
)
232 DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY
, EC_PRIVATEKEY
)
233 IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY
)
235 /* some declarations of internal function */
237 /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */
238 static int ec_asn1_group2fieldid(const EC_GROUP
*, X9_62_FIELDID
*);
239 /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */
240 static int ec_asn1_group2curve(const EC_GROUP
*, X9_62_CURVE
*);
242 /* the function definitions */
244 static int ec_asn1_group2fieldid(const EC_GROUP
*group
, X9_62_FIELDID
*field
)
249 if (group
== NULL
|| field
== NULL
)
252 /* clear the old values (if necessary) */
253 ASN1_OBJECT_free(field
->fieldType
);
254 ASN1_TYPE_free(field
->p
.other
);
256 nid
= EC_METHOD_get_field_type(EC_GROUP_method_of(group
));
257 /* set OID for the field */
258 if ((field
->fieldType
= OBJ_nid2obj(nid
)) == NULL
) {
259 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_OBJ_LIB
);
263 if (nid
== NID_X9_62_prime_field
) {
264 if ((tmp
= BN_new()) == NULL
) {
265 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
268 /* the parameters are specified by the prime number p */
269 if (!EC_GROUP_get_curve_GFp(group
, tmp
, NULL
, NULL
, NULL
)) {
270 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_EC_LIB
);
273 /* set the prime number */
274 field
->p
.prime
= BN_to_ASN1_INTEGER(tmp
, NULL
);
275 if (field
->p
.prime
== NULL
) {
276 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_ASN1_LIB
);
279 } else if (nid
== NID_X9_62_characteristic_two_field
)
280 #ifdef OPENSSL_NO_EC2M
282 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, EC_R_GF2M_NOT_SUPPORTED
);
288 X9_62_CHARACTERISTIC_TWO
*char_two
;
290 field
->p
.char_two
= X9_62_CHARACTERISTIC_TWO_new();
291 char_two
= field
->p
.char_two
;
293 if (char_two
== NULL
) {
294 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
298 char_two
->m
= (long)EC_GROUP_get_degree(group
);
300 field_type
= EC_GROUP_get_basis_type(group
);
302 if (field_type
== 0) {
303 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_EC_LIB
);
306 /* set base type OID */
307 if ((char_two
->type
= OBJ_nid2obj(field_type
)) == NULL
) {
308 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_OBJ_LIB
);
312 if (field_type
== NID_X9_62_tpBasis
) {
315 if (!EC_GROUP_get_trinomial_basis(group
, &k
))
318 char_two
->p
.tpBasis
= ASN1_INTEGER_new();
319 if (char_two
->p
.tpBasis
== NULL
) {
320 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
323 if (!ASN1_INTEGER_set(char_two
->p
.tpBasis
, (long)k
)) {
324 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_ASN1_LIB
);
327 } else if (field_type
== NID_X9_62_ppBasis
) {
328 unsigned int k1
, k2
, k3
;
330 if (!EC_GROUP_get_pentanomial_basis(group
, &k1
, &k2
, &k3
))
333 char_two
->p
.ppBasis
= X9_62_PENTANOMIAL_new();
334 if (char_two
->p
.ppBasis
== NULL
) {
335 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
340 char_two
->p
.ppBasis
->k1
= (long)k1
;
341 char_two
->p
.ppBasis
->k2
= (long)k2
;
342 char_two
->p
.ppBasis
->k3
= (long)k3
;
343 } else { /* field_type == NID_X9_62_onBasis */
345 /* for ONB the parameters are (asn1) NULL */
346 char_two
->p
.onBasis
= ASN1_NULL_new();
347 if (char_two
->p
.onBasis
== NULL
) {
348 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
355 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, EC_R_UNSUPPORTED_FIELD
);
366 static int ec_asn1_group2curve(const EC_GROUP
*group
, X9_62_CURVE
*curve
)
369 BIGNUM
*tmp_1
= NULL
, *tmp_2
= NULL
;
370 unsigned char *buffer_1
= NULL
, *buffer_2
= NULL
,
371 *a_buf
= NULL
, *b_buf
= NULL
;
373 unsigned char char_zero
= 0;
375 if (!group
|| !curve
|| !curve
->a
|| !curve
->b
)
378 if ((tmp_1
= BN_new()) == NULL
|| (tmp_2
= BN_new()) == NULL
) {
379 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
383 nid
= EC_METHOD_get_field_type(EC_GROUP_method_of(group
));
386 if (nid
== NID_X9_62_prime_field
) {
387 if (!EC_GROUP_get_curve_GFp(group
, NULL
, tmp_1
, tmp_2
, NULL
)) {
388 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_EC_LIB
);
392 #ifndef OPENSSL_NO_EC2M
393 else { /* nid == NID_X9_62_characteristic_two_field */
395 if (!EC_GROUP_get_curve_GF2m(group
, NULL
, tmp_1
, tmp_2
, NULL
)) {
396 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_EC_LIB
);
401 len_1
= (size_t)BN_num_bytes(tmp_1
);
402 len_2
= (size_t)BN_num_bytes(tmp_2
);
405 /* len_1 == 0 => a == 0 */
409 if ((buffer_1
= OPENSSL_malloc(len_1
)) == NULL
) {
410 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
413 if ((len_1
= BN_bn2bin(tmp_1
, buffer_1
)) == 0) {
414 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_BN_LIB
);
421 /* len_2 == 0 => b == 0 */
425 if ((buffer_2
= OPENSSL_malloc(len_2
)) == NULL
) {
426 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
429 if ((len_2
= BN_bn2bin(tmp_2
, buffer_2
)) == 0) {
430 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_BN_LIB
);
437 if (!ASN1_OCTET_STRING_set(curve
->a
, a_buf
, len_1
) ||
438 !ASN1_OCTET_STRING_set(curve
->b
, b_buf
, len_2
)) {
439 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_ASN1_LIB
);
443 /* set the seed (optional) */
446 if ((curve
->seed
= ASN1_BIT_STRING_new()) == NULL
) {
447 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
450 curve
->seed
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
| 0x07);
451 curve
->seed
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
452 if (!ASN1_BIT_STRING_set(curve
->seed
, group
->seed
,
453 (int)group
->seed_len
)) {
454 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_ASN1_LIB
);
458 ASN1_BIT_STRING_free(curve
->seed
);
465 OPENSSL_free(buffer_1
);
466 OPENSSL_free(buffer_2
);
472 ECPARAMETERS
*EC_GROUP_get_ecparameters(const EC_GROUP
*group
,
473 ECPARAMETERS
*params
)
476 ECPARAMETERS
*ret
= NULL
;
478 unsigned char *buffer
= NULL
;
479 const EC_POINT
*point
= NULL
;
480 point_conversion_form_t form
;
482 if (params
== NULL
) {
483 if ((ret
= ECPARAMETERS_new()) == NULL
) {
484 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_MALLOC_FAILURE
);
490 /* set the version (always one) */
491 ret
->version
= (long)0x1;
493 /* set the fieldID */
494 if (!ec_asn1_group2fieldid(group
, ret
->fieldID
)) {
495 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_EC_LIB
);
500 if (!ec_asn1_group2curve(group
, ret
->curve
)) {
501 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_EC_LIB
);
505 /* set the base point */
506 if ((point
= EC_GROUP_get0_generator(group
)) == NULL
) {
507 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, EC_R_UNDEFINED_GENERATOR
);
511 form
= EC_GROUP_get_point_conversion_form(group
);
513 len
= EC_POINT_point2buf(group
, point
, form
, &buffer
, NULL
);
515 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_EC_LIB
);
518 if (ret
->base
== NULL
&& (ret
->base
= ASN1_OCTET_STRING_new()) == NULL
) {
519 OPENSSL_free(buffer
);
520 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_MALLOC_FAILURE
);
523 ASN1_STRING_set0(ret
->base
, buffer
, len
);
526 tmp
= EC_GROUP_get0_order(group
);
528 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_EC_LIB
);
531 ret
->order
= BN_to_ASN1_INTEGER(tmp
, ret
->order
);
532 if (ret
->order
== NULL
) {
533 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_ASN1_LIB
);
537 /* set the cofactor (optional) */
538 tmp
= EC_GROUP_get0_cofactor(group
);
540 ret
->cofactor
= BN_to_ASN1_INTEGER(tmp
, ret
->cofactor
);
541 if (ret
->cofactor
== NULL
) {
542 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_ASN1_LIB
);
551 ECPARAMETERS_free(ret
);
555 ECPKPARAMETERS
*EC_GROUP_get_ecpkparameters(const EC_GROUP
*group
,
556 ECPKPARAMETERS
*params
)
559 ECPKPARAMETERS
*ret
= params
;
562 if ((ret
= ECPKPARAMETERS_new()) == NULL
) {
563 ECerr(EC_F_EC_GROUP_GET_ECPKPARAMETERS
, ERR_R_MALLOC_FAILURE
);
568 ASN1_OBJECT_free(ret
->value
.named_curve
);
569 else if (ret
->type
== 1 && ret
->value
.parameters
)
570 ECPARAMETERS_free(ret
->value
.parameters
);
573 if (EC_GROUP_get_asn1_flag(group
)) {
575 * use the asn1 OID to describe the the elliptic curve parameters
577 tmp
= EC_GROUP_get_curve_name(group
);
580 if ((ret
->value
.named_curve
= OBJ_nid2obj(tmp
)) == NULL
)
583 /* we don't know the nid => ERROR */
586 /* use the ECPARAMETERS structure */
588 if ((ret
->value
.parameters
=
589 EC_GROUP_get_ecparameters(group
, NULL
)) == NULL
)
594 ECPKPARAMETERS_free(ret
);
600 EC_GROUP
*EC_GROUP_new_from_ecparameters(const ECPARAMETERS
*params
)
603 EC_GROUP
*ret
= NULL
;
604 BIGNUM
*p
= NULL
, *a
= NULL
, *b
= NULL
;
605 EC_POINT
*point
= NULL
;
608 if (!params
->fieldID
|| !params
->fieldID
->fieldType
||
609 !params
->fieldID
->p
.ptr
) {
610 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
614 /* now extract the curve parameters a and b */
615 if (!params
->curve
|| !params
->curve
->a
||
616 !params
->curve
->a
->data
|| !params
->curve
->b
||
617 !params
->curve
->b
->data
) {
618 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
621 a
= BN_bin2bn(params
->curve
->a
->data
, params
->curve
->a
->length
, NULL
);
623 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_BN_LIB
);
626 b
= BN_bin2bn(params
->curve
->b
->data
, params
->curve
->b
->length
, NULL
);
628 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_BN_LIB
);
632 /* get the field parameters */
633 tmp
= OBJ_obj2nid(params
->fieldID
->fieldType
);
634 if (tmp
== NID_X9_62_characteristic_two_field
)
635 #ifdef OPENSSL_NO_EC2M
637 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_GF2M_NOT_SUPPORTED
);
642 X9_62_CHARACTERISTIC_TWO
*char_two
;
644 char_two
= params
->fieldID
->p
.char_two
;
646 field_bits
= char_two
->m
;
647 if (field_bits
> OPENSSL_ECC_MAX_FIELD_BITS
) {
648 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_FIELD_TOO_LARGE
);
652 if ((p
= BN_new()) == NULL
) {
653 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_MALLOC_FAILURE
);
657 /* get the base type */
658 tmp
= OBJ_obj2nid(char_two
->type
);
660 if (tmp
== NID_X9_62_tpBasis
) {
663 if (!char_two
->p
.tpBasis
) {
664 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
668 tmp_long
= ASN1_INTEGER_get(char_two
->p
.tpBasis
);
670 if (!(char_two
->m
> tmp_long
&& tmp_long
> 0)) {
671 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
,
672 EC_R_INVALID_TRINOMIAL_BASIS
);
676 /* create the polynomial */
677 if (!BN_set_bit(p
, (int)char_two
->m
))
679 if (!BN_set_bit(p
, (int)tmp_long
))
681 if (!BN_set_bit(p
, 0))
683 } else if (tmp
== NID_X9_62_ppBasis
) {
684 X9_62_PENTANOMIAL
*penta
;
686 penta
= char_two
->p
.ppBasis
;
688 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
693 (char_two
->m
> penta
->k3
&& penta
->k3
> penta
->k2
694 && penta
->k2
> penta
->k1
&& penta
->k1
> 0)) {
695 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
,
696 EC_R_INVALID_PENTANOMIAL_BASIS
);
700 /* create the polynomial */
701 if (!BN_set_bit(p
, (int)char_two
->m
))
703 if (!BN_set_bit(p
, (int)penta
->k1
))
705 if (!BN_set_bit(p
, (int)penta
->k2
))
707 if (!BN_set_bit(p
, (int)penta
->k3
))
709 if (!BN_set_bit(p
, 0))
711 } else if (tmp
== NID_X9_62_onBasis
) {
712 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_NOT_IMPLEMENTED
);
716 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
720 /* create the EC_GROUP structure */
721 ret
= EC_GROUP_new_curve_GF2m(p
, a
, b
, NULL
);
724 else if (tmp
== NID_X9_62_prime_field
) {
725 /* we have a curve over a prime field */
726 /* extract the prime number */
727 if (!params
->fieldID
->p
.prime
) {
728 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
731 p
= ASN1_INTEGER_to_BN(params
->fieldID
->p
.prime
, NULL
);
733 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_ASN1_LIB
);
737 if (BN_is_negative(p
) || BN_is_zero(p
)) {
738 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_INVALID_FIELD
);
742 field_bits
= BN_num_bits(p
);
743 if (field_bits
> OPENSSL_ECC_MAX_FIELD_BITS
) {
744 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_FIELD_TOO_LARGE
);
748 /* create the EC_GROUP structure */
749 ret
= EC_GROUP_new_curve_GFp(p
, a
, b
, NULL
);
751 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_INVALID_FIELD
);
756 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_EC_LIB
);
760 /* extract seed (optional) */
761 if (params
->curve
->seed
!= NULL
) {
762 OPENSSL_free(ret
->seed
);
763 if ((ret
->seed
= OPENSSL_malloc(params
->curve
->seed
->length
)) == NULL
) {
764 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_MALLOC_FAILURE
);
767 memcpy(ret
->seed
, params
->curve
->seed
->data
,
768 params
->curve
->seed
->length
);
769 ret
->seed_len
= params
->curve
->seed
->length
;
772 if (!params
->order
|| !params
->base
|| !params
->base
->data
) {
773 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
777 if ((point
= EC_POINT_new(ret
)) == NULL
)
780 /* set the point conversion form */
781 EC_GROUP_set_point_conversion_form(ret
, (point_conversion_form_t
)
782 (params
->base
->data
[0] & ~0x01));
784 /* extract the ec point */
785 if (!EC_POINT_oct2point(ret
, point
, params
->base
->data
,
786 params
->base
->length
, NULL
)) {
787 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_EC_LIB
);
791 /* extract the order */
792 if ((a
= ASN1_INTEGER_to_BN(params
->order
, a
)) == NULL
) {
793 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_ASN1_LIB
);
796 if (BN_is_negative(a
) || BN_is_zero(a
)) {
797 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_INVALID_GROUP_ORDER
);
800 if (BN_num_bits(a
) > (int)field_bits
+ 1) { /* Hasse bound */
801 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_INVALID_GROUP_ORDER
);
805 /* extract the cofactor (optional) */
806 if (params
->cofactor
== NULL
) {
809 } else if ((b
= ASN1_INTEGER_to_BN(params
->cofactor
, b
)) == NULL
) {
810 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_ASN1_LIB
);
813 /* set the generator, order and cofactor (if present) */
814 if (!EC_GROUP_set_generator(ret
, point
, a
, b
)) {
815 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_EC_LIB
);
823 EC_GROUP_clear_free(ret
);
830 EC_POINT_free(point
);
834 EC_GROUP
*EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS
*params
)
836 EC_GROUP
*ret
= NULL
;
839 if (params
== NULL
) {
840 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS
, EC_R_MISSING_PARAMETERS
);
844 if (params
->type
== 0) { /* the curve is given by an OID */
845 tmp
= OBJ_obj2nid(params
->value
.named_curve
);
846 if ((ret
= EC_GROUP_new_by_curve_name(tmp
)) == NULL
) {
847 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS
,
848 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE
);
851 EC_GROUP_set_asn1_flag(ret
, OPENSSL_EC_NAMED_CURVE
);
852 } else if (params
->type
== 1) { /* the parameters are given by a
853 * ECPARAMETERS structure */
854 ret
= EC_GROUP_new_from_ecparameters(params
->value
.parameters
);
856 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS
, ERR_R_EC_LIB
);
859 EC_GROUP_set_asn1_flag(ret
, 0x0);
860 } else if (params
->type
== 2) { /* implicitlyCA */
863 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS
, EC_R_ASN1_ERROR
);
870 /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
872 EC_GROUP
*d2i_ECPKParameters(EC_GROUP
**a
, const unsigned char **in
, long len
)
874 EC_GROUP
*group
= NULL
;
875 ECPKPARAMETERS
*params
= NULL
;
876 const unsigned char *p
= *in
;
878 if ((params
= d2i_ECPKPARAMETERS(NULL
, &p
, len
)) == NULL
) {
879 ECerr(EC_F_D2I_ECPKPARAMETERS
, EC_R_D2I_ECPKPARAMETERS_FAILURE
);
880 ECPKPARAMETERS_free(params
);
884 if ((group
= EC_GROUP_new_from_ecpkparameters(params
)) == NULL
) {
885 ECerr(EC_F_D2I_ECPKPARAMETERS
, EC_R_PKPARAMETERS2GROUP_FAILURE
);
886 ECPKPARAMETERS_free(params
);
891 EC_GROUP_clear_free(*a
);
895 ECPKPARAMETERS_free(params
);
900 int i2d_ECPKParameters(const EC_GROUP
*a
, unsigned char **out
)
903 ECPKPARAMETERS
*tmp
= EC_GROUP_get_ecpkparameters(a
, NULL
);
905 ECerr(EC_F_I2D_ECPKPARAMETERS
, EC_R_GROUP2PKPARAMETERS_FAILURE
);
908 if ((ret
= i2d_ECPKPARAMETERS(tmp
, out
)) == 0) {
909 ECerr(EC_F_I2D_ECPKPARAMETERS
, EC_R_I2D_ECPKPARAMETERS_FAILURE
);
910 ECPKPARAMETERS_free(tmp
);
913 ECPKPARAMETERS_free(tmp
);
917 /* some EC_KEY functions */
919 EC_KEY
*d2i_ECPrivateKey(EC_KEY
**a
, const unsigned char **in
, long len
)
922 EC_PRIVATEKEY
*priv_key
= NULL
;
923 const unsigned char *p
= *in
;
925 if ((priv_key
= d2i_EC_PRIVATEKEY(NULL
, &p
, len
)) == NULL
) {
926 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
930 if (a
== NULL
|| *a
== NULL
) {
931 if ((ret
= EC_KEY_new()) == NULL
) {
932 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
938 if (priv_key
->parameters
) {
939 EC_GROUP_clear_free(ret
->group
);
940 ret
->group
= EC_GROUP_new_from_ecpkparameters(priv_key
->parameters
);
943 if (ret
->group
== NULL
) {
944 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
948 ret
->version
= priv_key
->version
;
950 if (priv_key
->privateKey
) {
951 ASN1_OCTET_STRING
*pkey
= priv_key
->privateKey
;
952 if (EC_KEY_oct2priv(ret
, ASN1_STRING_get0_data(pkey
),
953 ASN1_STRING_length(pkey
)) == 0)
956 ECerr(EC_F_D2I_ECPRIVATEKEY
, EC_R_MISSING_PRIVATE_KEY
);
960 EC_POINT_clear_free(ret
->pub_key
);
961 ret
->pub_key
= EC_POINT_new(ret
->group
);
962 if (ret
->pub_key
== NULL
) {
963 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
967 if (priv_key
->publicKey
) {
968 const unsigned char *pub_oct
;
971 pub_oct
= ASN1_STRING_get0_data(priv_key
->publicKey
);
972 pub_oct_len
= ASN1_STRING_length(priv_key
->publicKey
);
973 if (!EC_KEY_oct2key(ret
, pub_oct
, pub_oct_len
, NULL
)) {
974 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
978 if (ret
->group
->meth
->keygenpub
== NULL
979 || ret
->group
->meth
->keygenpub(ret
) == 0)
981 /* Remember the original private-key-only encoding. */
982 ret
->enc_flag
|= EC_PKEY_NO_PUBKEY
;
987 EC_PRIVATEKEY_free(priv_key
);
992 if (a
== NULL
|| *a
!= ret
)
994 EC_PRIVATEKEY_free(priv_key
);
998 int i2d_ECPrivateKey(EC_KEY
*a
, unsigned char **out
)
1000 int ret
= 0, ok
= 0;
1001 unsigned char *priv
= NULL
, *pub
= NULL
;
1002 size_t privlen
= 0, publen
= 0;
1004 EC_PRIVATEKEY
*priv_key
= NULL
;
1006 if (a
== NULL
|| a
->group
== NULL
||
1007 (!(a
->enc_flag
& EC_PKEY_NO_PUBKEY
) && a
->pub_key
== NULL
)) {
1008 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_PASSED_NULL_PARAMETER
);
1012 if ((priv_key
= EC_PRIVATEKEY_new()) == NULL
) {
1013 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1017 priv_key
->version
= a
->version
;
1019 privlen
= EC_KEY_priv2buf(a
, &priv
);
1022 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1026 ASN1_STRING_set0(priv_key
->privateKey
, priv
, privlen
);
1029 if (!(a
->enc_flag
& EC_PKEY_NO_PARAMETERS
)) {
1030 if ((priv_key
->parameters
=
1031 EC_GROUP_get_ecpkparameters(a
->group
,
1032 priv_key
->parameters
)) == NULL
) {
1033 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1038 if (!(a
->enc_flag
& EC_PKEY_NO_PUBKEY
)) {
1039 priv_key
->publicKey
= ASN1_BIT_STRING_new();
1040 if (priv_key
->publicKey
== NULL
) {
1041 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1045 publen
= EC_KEY_key2buf(a
, a
->conv_form
, &pub
, NULL
);
1048 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1052 priv_key
->publicKey
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
| 0x07);
1053 priv_key
->publicKey
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
1054 ASN1_STRING_set0(priv_key
->publicKey
, pub
, publen
);
1058 if ((ret
= i2d_EC_PRIVATEKEY(priv_key
, out
)) == 0) {
1059 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1064 OPENSSL_clear_free(priv
, privlen
);
1066 EC_PRIVATEKEY_free(priv_key
);
1067 return (ok
? ret
: 0);
1070 int i2d_ECParameters(EC_KEY
*a
, unsigned char **out
)
1073 ECerr(EC_F_I2D_ECPARAMETERS
, ERR_R_PASSED_NULL_PARAMETER
);
1076 return i2d_ECPKParameters(a
->group
, out
);
1079 EC_KEY
*d2i_ECParameters(EC_KEY
**a
, const unsigned char **in
, long len
)
1083 if (in
== NULL
|| *in
== NULL
) {
1084 ECerr(EC_F_D2I_ECPARAMETERS
, ERR_R_PASSED_NULL_PARAMETER
);
1088 if (a
== NULL
|| *a
== NULL
) {
1089 if ((ret
= EC_KEY_new()) == NULL
) {
1090 ECerr(EC_F_D2I_ECPARAMETERS
, ERR_R_MALLOC_FAILURE
);
1096 if (!d2i_ECPKParameters(&ret
->group
, in
, len
)) {
1097 ECerr(EC_F_D2I_ECPARAMETERS
, ERR_R_EC_LIB
);
1098 if (a
== NULL
|| *a
!= ret
)
1109 EC_KEY
*o2i_ECPublicKey(EC_KEY
**a
, const unsigned char **in
, long len
)
1113 if (a
== NULL
|| (*a
) == NULL
|| (*a
)->group
== NULL
) {
1115 * sorry, but a EC_GROUP-structure is necessary to set the public key
1117 ECerr(EC_F_O2I_ECPUBLICKEY
, ERR_R_PASSED_NULL_PARAMETER
);
1121 if (!EC_KEY_oct2key(ret
, *in
, len
, NULL
)) {
1122 ECerr(EC_F_O2I_ECPUBLICKEY
, ERR_R_EC_LIB
);
1129 int i2o_ECPublicKey(const EC_KEY
*a
, unsigned char **out
)
1135 ECerr(EC_F_I2O_ECPUBLICKEY
, ERR_R_PASSED_NULL_PARAMETER
);
1139 buf_len
= EC_POINT_point2oct(a
->group
, a
->pub_key
,
1140 a
->conv_form
, NULL
, 0, NULL
);
1142 if (out
== NULL
|| buf_len
== 0)
1143 /* out == NULL => just return the length of the octet string */
1147 if ((*out
= OPENSSL_malloc(buf_len
)) == NULL
) {
1148 ECerr(EC_F_I2O_ECPUBLICKEY
, ERR_R_MALLOC_FAILURE
);
1153 if (!EC_POINT_point2oct(a
->group
, a
->pub_key
, a
->conv_form
,
1154 *out
, buf_len
, NULL
)) {
1155 ECerr(EC_F_I2O_ECPUBLICKEY
, ERR_R_EC_LIB
);
1167 ASN1_SEQUENCE(ECDSA_SIG
) = {
1168 ASN1_SIMPLE(ECDSA_SIG
, r
, CBIGNUM
),
1169 ASN1_SIMPLE(ECDSA_SIG
, s
, CBIGNUM
)
1170 } static_ASN1_SEQUENCE_END(ECDSA_SIG
)
1172 DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG
)
1173 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG
, ECDSA_SIG
)
1174 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSA_SIG
, ECDSA_SIG
, ECDSA_SIG
)
1176 ECDSA_SIG
*ECDSA_SIG_new(void)
1178 ECDSA_SIG
*sig
= OPENSSL_zalloc(sizeof(*sig
));
1180 ECerr(EC_F_ECDSA_SIG_NEW
, ERR_R_MALLOC_FAILURE
);
1184 void ECDSA_SIG_free(ECDSA_SIG
*sig
)
1188 BN_clear_free(sig
->r
);
1189 BN_clear_free(sig
->s
);
1193 void ECDSA_SIG_get0(const ECDSA_SIG
*sig
, const BIGNUM
**pr
, const BIGNUM
**ps
)
1201 int ECDSA_SIG_set0(ECDSA_SIG
*sig
, BIGNUM
*r
, BIGNUM
*s
)
1203 if (r
== NULL
|| s
== NULL
)
1205 BN_clear_free(sig
->r
);
1206 BN_clear_free(sig
->s
);
1212 int ECDSA_size(const EC_KEY
*r
)
1216 unsigned char buf
[4];
1217 const EC_GROUP
*group
;
1221 group
= EC_KEY_get0_group(r
);
1225 i
= EC_GROUP_order_bits(group
);
1228 bs
.length
= (i
+ 7) / 8;
1230 bs
.type
= V_ASN1_INTEGER
;
1231 /* If the top bit is set the asn1 encoding is 1 larger. */
1234 i
= i2d_ASN1_INTEGER(&bs
, NULL
);
1235 i
+= i
; /* r and s */
1236 ret
= ASN1_object_size(1, i
, V_ASN1_SEQUENCE
);