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>
16 int EC_GROUP_get_basis_type(const EC_GROUP
*group
)
20 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group
)) !=
21 NID_X9_62_characteristic_two_field
)
22 /* everything else is currently not supported */
25 /* Find the last non-zero element of group->poly[] */
27 i
< (int)OSSL_NELEM(group
->poly
) && group
->poly
[i
] != 0;
32 return NID_X9_62_ppBasis
;
34 return NID_X9_62_tpBasis
;
36 /* everything else is currently not supported */
40 #ifndef OPENSSL_NO_EC2M
41 int EC_GROUP_get_trinomial_basis(const EC_GROUP
*group
, unsigned int *k
)
46 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group
)) !=
47 NID_X9_62_characteristic_two_field
48 || !((group
->poly
[0] != 0) && (group
->poly
[1] != 0)
49 && (group
->poly
[2] == 0))) {
50 ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS
,
51 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
61 int EC_GROUP_get_pentanomial_basis(const EC_GROUP
*group
, unsigned int *k1
,
62 unsigned int *k2
, unsigned int *k3
)
67 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group
)) !=
68 NID_X9_62_characteristic_two_field
69 || !((group
->poly
[0] != 0) && (group
->poly
[1] != 0)
70 && (group
->poly
[2] != 0) && (group
->poly
[3] != 0)
71 && (group
->poly
[4] == 0))) {
72 ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS
,
73 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
88 /* some structures needed for the asn1 encoding */
89 typedef struct x9_62_pentanomial_st
{
95 typedef struct x9_62_characteristic_two_st
{
100 /* NID_X9_62_onBasis */
102 /* NID_X9_62_tpBasis */
103 ASN1_INTEGER
*tpBasis
;
104 /* NID_X9_62_ppBasis */
105 X9_62_PENTANOMIAL
*ppBasis
;
109 } X9_62_CHARACTERISTIC_TWO
;
111 typedef struct x9_62_fieldid_st
{
112 ASN1_OBJECT
*fieldType
;
115 /* NID_X9_62_prime_field */
117 /* NID_X9_62_characteristic_two_field */
118 X9_62_CHARACTERISTIC_TWO
*char_two
;
124 typedef struct x9_62_curve_st
{
125 ASN1_OCTET_STRING
*a
;
126 ASN1_OCTET_STRING
*b
;
127 ASN1_BIT_STRING
*seed
;
130 struct ec_parameters_st
{
132 X9_62_FIELDID
*fieldID
;
134 ASN1_OCTET_STRING
*base
;
136 ASN1_INTEGER
*cofactor
;
137 } /* ECPARAMETERS */ ;
139 struct ecpk_parameters_st
{
142 ASN1_OBJECT
*named_curve
;
143 ECPARAMETERS
*parameters
;
144 ASN1_NULL
*implicitlyCA
;
146 } /* ECPKPARAMETERS */ ;
148 /* SEC1 ECPrivateKey */
149 typedef struct ec_privatekey_st
{
151 ASN1_OCTET_STRING
*privateKey
;
152 ECPKPARAMETERS
*parameters
;
153 ASN1_BIT_STRING
*publicKey
;
156 /* the OpenSSL ASN.1 definitions */
157 ASN1_SEQUENCE(X9_62_PENTANOMIAL
) = {
158 ASN1_EMBED(X9_62_PENTANOMIAL
, k1
, INT32
),
159 ASN1_EMBED(X9_62_PENTANOMIAL
, k2
, INT32
),
160 ASN1_EMBED(X9_62_PENTANOMIAL
, k3
, INT32
)
161 } static_ASN1_SEQUENCE_END(X9_62_PENTANOMIAL
)
163 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL
)
164 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL
)
166 ASN1_ADB_TEMPLATE(char_two_def
) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, p
.other
, ASN1_ANY
);
168 ASN1_ADB(X9_62_CHARACTERISTIC_TWO
) = {
169 ADB_ENTRY(NID_X9_62_onBasis
, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, p
.onBasis
, ASN1_NULL
)),
170 ADB_ENTRY(NID_X9_62_tpBasis
, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, p
.tpBasis
, ASN1_INTEGER
)),
171 ADB_ENTRY(NID_X9_62_ppBasis
, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, p
.ppBasis
, X9_62_PENTANOMIAL
))
172 } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO
, 0, type
, 0, &char_two_def_tt
, NULL
);
174 ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO
) = {
175 ASN1_EMBED(X9_62_CHARACTERISTIC_TWO
, m
, INT32
),
176 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO
, type
, ASN1_OBJECT
),
177 ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO
)
178 } static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO
)
180 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO
)
181 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO
)
183 ASN1_ADB_TEMPLATE(fieldID_def
) = ASN1_SIMPLE(X9_62_FIELDID
, p
.other
, ASN1_ANY
);
185 ASN1_ADB(X9_62_FIELDID
) = {
186 ADB_ENTRY(NID_X9_62_prime_field
, ASN1_SIMPLE(X9_62_FIELDID
, p
.prime
, ASN1_INTEGER
)),
187 ADB_ENTRY(NID_X9_62_characteristic_two_field
, ASN1_SIMPLE(X9_62_FIELDID
, p
.char_two
, X9_62_CHARACTERISTIC_TWO
))
188 } ASN1_ADB_END(X9_62_FIELDID
, 0, fieldType
, 0, &fieldID_def_tt
, NULL
);
190 ASN1_SEQUENCE(X9_62_FIELDID
) = {
191 ASN1_SIMPLE(X9_62_FIELDID
, fieldType
, ASN1_OBJECT
),
192 ASN1_ADB_OBJECT(X9_62_FIELDID
)
193 } static_ASN1_SEQUENCE_END(X9_62_FIELDID
)
195 ASN1_SEQUENCE(X9_62_CURVE
) = {
196 ASN1_SIMPLE(X9_62_CURVE
, a
, ASN1_OCTET_STRING
),
197 ASN1_SIMPLE(X9_62_CURVE
, b
, ASN1_OCTET_STRING
),
198 ASN1_OPT(X9_62_CURVE
, seed
, ASN1_BIT_STRING
)
199 } static_ASN1_SEQUENCE_END(X9_62_CURVE
)
201 ASN1_SEQUENCE(ECPARAMETERS
) = {
202 ASN1_EMBED(ECPARAMETERS
, version
, INT32
),
203 ASN1_SIMPLE(ECPARAMETERS
, fieldID
, X9_62_FIELDID
),
204 ASN1_SIMPLE(ECPARAMETERS
, curve
, X9_62_CURVE
),
205 ASN1_SIMPLE(ECPARAMETERS
, base
, ASN1_OCTET_STRING
),
206 ASN1_SIMPLE(ECPARAMETERS
, order
, ASN1_INTEGER
),
207 ASN1_OPT(ECPARAMETERS
, cofactor
, ASN1_INTEGER
)
208 } ASN1_SEQUENCE_END(ECPARAMETERS
)
210 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS
)
211 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS
)
213 ASN1_CHOICE(ECPKPARAMETERS
) = {
214 ASN1_SIMPLE(ECPKPARAMETERS
, value
.named_curve
, ASN1_OBJECT
),
215 ASN1_SIMPLE(ECPKPARAMETERS
, value
.parameters
, ECPARAMETERS
),
216 ASN1_SIMPLE(ECPKPARAMETERS
, value
.implicitlyCA
, ASN1_NULL
)
217 } ASN1_CHOICE_END(ECPKPARAMETERS
)
219 DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS
)
220 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS
, ECPKPARAMETERS
)
221 IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS
)
223 ASN1_SEQUENCE(EC_PRIVATEKEY
) = {
224 ASN1_EMBED(EC_PRIVATEKEY
, version
, INT32
),
225 ASN1_SIMPLE(EC_PRIVATEKEY
, privateKey
, ASN1_OCTET_STRING
),
226 ASN1_EXP_OPT(EC_PRIVATEKEY
, parameters
, ECPKPARAMETERS
, 0),
227 ASN1_EXP_OPT(EC_PRIVATEKEY
, publicKey
, ASN1_BIT_STRING
, 1)
228 } static_ASN1_SEQUENCE_END(EC_PRIVATEKEY
)
230 DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY
)
231 DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY
, EC_PRIVATEKEY
)
232 IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY
)
234 /* some declarations of internal function */
236 /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */
237 static int ec_asn1_group2fieldid(const EC_GROUP
*, X9_62_FIELDID
*);
238 /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */
239 static int ec_asn1_group2curve(const EC_GROUP
*, X9_62_CURVE
*);
241 /* the function definitions */
243 static int ec_asn1_group2fieldid(const EC_GROUP
*group
, X9_62_FIELDID
*field
)
248 if (group
== NULL
|| field
== NULL
)
251 /* clear the old values (if necessary) */
252 ASN1_OBJECT_free(field
->fieldType
);
253 ASN1_TYPE_free(field
->p
.other
);
255 nid
= EC_METHOD_get_field_type(EC_GROUP_method_of(group
));
256 /* set OID for the field */
257 if ((field
->fieldType
= OBJ_nid2obj(nid
)) == NULL
) {
258 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_OBJ_LIB
);
262 if (nid
== NID_X9_62_prime_field
) {
263 if ((tmp
= BN_new()) == NULL
) {
264 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
267 /* the parameters are specified by the prime number p */
268 if (!EC_GROUP_get_curve_GFp(group
, tmp
, NULL
, NULL
, NULL
)) {
269 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_EC_LIB
);
272 /* set the prime number */
273 field
->p
.prime
= BN_to_ASN1_INTEGER(tmp
, NULL
);
274 if (field
->p
.prime
== NULL
) {
275 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_ASN1_LIB
);
278 } else if (nid
== NID_X9_62_characteristic_two_field
)
279 #ifdef OPENSSL_NO_EC2M
281 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, EC_R_GF2M_NOT_SUPPORTED
);
287 X9_62_CHARACTERISTIC_TWO
*char_two
;
289 field
->p
.char_two
= X9_62_CHARACTERISTIC_TWO_new();
290 char_two
= field
->p
.char_two
;
292 if (char_two
== NULL
) {
293 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
297 char_two
->m
= (long)EC_GROUP_get_degree(group
);
299 field_type
= EC_GROUP_get_basis_type(group
);
301 if (field_type
== 0) {
302 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_EC_LIB
);
305 /* set base type OID */
306 if ((char_two
->type
= OBJ_nid2obj(field_type
)) == NULL
) {
307 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_OBJ_LIB
);
311 if (field_type
== NID_X9_62_tpBasis
) {
314 if (!EC_GROUP_get_trinomial_basis(group
, &k
))
317 char_two
->p
.tpBasis
= ASN1_INTEGER_new();
318 if (char_two
->p
.tpBasis
== NULL
) {
319 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
322 if (!ASN1_INTEGER_set(char_two
->p
.tpBasis
, (long)k
)) {
323 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_ASN1_LIB
);
326 } else if (field_type
== NID_X9_62_ppBasis
) {
327 unsigned int k1
, k2
, k3
;
329 if (!EC_GROUP_get_pentanomial_basis(group
, &k1
, &k2
, &k3
))
332 char_two
->p
.ppBasis
= X9_62_PENTANOMIAL_new();
333 if (char_two
->p
.ppBasis
== NULL
) {
334 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
339 char_two
->p
.ppBasis
->k1
= (long)k1
;
340 char_two
->p
.ppBasis
->k2
= (long)k2
;
341 char_two
->p
.ppBasis
->k3
= (long)k3
;
342 } else { /* field_type == NID_X9_62_onBasis */
344 /* for ONB the parameters are (asn1) NULL */
345 char_two
->p
.onBasis
= ASN1_NULL_new();
346 if (char_two
->p
.onBasis
== NULL
) {
347 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, ERR_R_MALLOC_FAILURE
);
354 ECerr(EC_F_EC_ASN1_GROUP2FIELDID
, EC_R_UNSUPPORTED_FIELD
);
365 static int ec_asn1_group2curve(const EC_GROUP
*group
, X9_62_CURVE
*curve
)
368 BIGNUM
*tmp_1
= NULL
, *tmp_2
= NULL
;
369 unsigned char *buffer_1
= NULL
, *buffer_2
= NULL
,
370 *a_buf
= NULL
, *b_buf
= NULL
;
372 unsigned char char_zero
= 0;
374 if (!group
|| !curve
|| !curve
->a
|| !curve
->b
)
377 if ((tmp_1
= BN_new()) == NULL
|| (tmp_2
= BN_new()) == NULL
) {
378 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
382 nid
= EC_METHOD_get_field_type(EC_GROUP_method_of(group
));
385 if (nid
== NID_X9_62_prime_field
) {
386 if (!EC_GROUP_get_curve_GFp(group
, NULL
, tmp_1
, tmp_2
, NULL
)) {
387 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_EC_LIB
);
391 #ifndef OPENSSL_NO_EC2M
392 else { /* nid == NID_X9_62_characteristic_two_field */
394 if (!EC_GROUP_get_curve_GF2m(group
, NULL
, tmp_1
, tmp_2
, NULL
)) {
395 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_EC_LIB
);
400 len_1
= (size_t)BN_num_bytes(tmp_1
);
401 len_2
= (size_t)BN_num_bytes(tmp_2
);
404 /* len_1 == 0 => a == 0 */
408 if ((buffer_1
= OPENSSL_malloc(len_1
)) == NULL
) {
409 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
412 if ((len_1
= BN_bn2bin(tmp_1
, buffer_1
)) == 0) {
413 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_BN_LIB
);
420 /* len_2 == 0 => b == 0 */
424 if ((buffer_2
= OPENSSL_malloc(len_2
)) == NULL
) {
425 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
428 if ((len_2
= BN_bn2bin(tmp_2
, buffer_2
)) == 0) {
429 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_BN_LIB
);
436 if (!ASN1_OCTET_STRING_set(curve
->a
, a_buf
, len_1
) ||
437 !ASN1_OCTET_STRING_set(curve
->b
, b_buf
, len_2
)) {
438 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_ASN1_LIB
);
442 /* set the seed (optional) */
445 if ((curve
->seed
= ASN1_BIT_STRING_new()) == NULL
) {
446 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_MALLOC_FAILURE
);
449 curve
->seed
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
| 0x07);
450 curve
->seed
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
451 if (!ASN1_BIT_STRING_set(curve
->seed
, group
->seed
,
452 (int)group
->seed_len
)) {
453 ECerr(EC_F_EC_ASN1_GROUP2CURVE
, ERR_R_ASN1_LIB
);
457 ASN1_BIT_STRING_free(curve
->seed
);
464 OPENSSL_free(buffer_1
);
465 OPENSSL_free(buffer_2
);
471 ECPARAMETERS
*EC_GROUP_get_ecparameters(const EC_GROUP
*group
,
472 ECPARAMETERS
*params
)
475 ECPARAMETERS
*ret
= NULL
;
477 unsigned char *buffer
= NULL
;
478 const EC_POINT
*point
= NULL
;
479 point_conversion_form_t form
;
481 if (params
== NULL
) {
482 if ((ret
= ECPARAMETERS_new()) == NULL
) {
483 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_MALLOC_FAILURE
);
489 /* set the version (always one) */
490 ret
->version
= (long)0x1;
492 /* set the fieldID */
493 if (!ec_asn1_group2fieldid(group
, ret
->fieldID
)) {
494 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_EC_LIB
);
499 if (!ec_asn1_group2curve(group
, ret
->curve
)) {
500 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_EC_LIB
);
504 /* set the base point */
505 if ((point
= EC_GROUP_get0_generator(group
)) == NULL
) {
506 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, EC_R_UNDEFINED_GENERATOR
);
510 form
= EC_GROUP_get_point_conversion_form(group
);
512 len
= EC_POINT_point2buf(group
, point
, form
, &buffer
, NULL
);
514 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_EC_LIB
);
517 if (ret
->base
== NULL
&& (ret
->base
= ASN1_OCTET_STRING_new()) == NULL
) {
518 OPENSSL_free(buffer
);
519 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_MALLOC_FAILURE
);
522 ASN1_STRING_set0(ret
->base
, buffer
, len
);
525 tmp
= EC_GROUP_get0_order(group
);
527 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_EC_LIB
);
530 ret
->order
= BN_to_ASN1_INTEGER(tmp
, ret
->order
);
531 if (ret
->order
== NULL
) {
532 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_ASN1_LIB
);
536 /* set the cofactor (optional) */
537 tmp
= EC_GROUP_get0_cofactor(group
);
539 ret
->cofactor
= BN_to_ASN1_INTEGER(tmp
, ret
->cofactor
);
540 if (ret
->cofactor
== NULL
) {
541 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS
, ERR_R_ASN1_LIB
);
550 ECPARAMETERS_free(ret
);
554 ECPKPARAMETERS
*EC_GROUP_get_ecpkparameters(const EC_GROUP
*group
,
555 ECPKPARAMETERS
*params
)
558 ECPKPARAMETERS
*ret
= params
;
561 if ((ret
= ECPKPARAMETERS_new()) == NULL
) {
562 ECerr(EC_F_EC_GROUP_GET_ECPKPARAMETERS
, ERR_R_MALLOC_FAILURE
);
567 ASN1_OBJECT_free(ret
->value
.named_curve
);
568 else if (ret
->type
== 1 && ret
->value
.parameters
)
569 ECPARAMETERS_free(ret
->value
.parameters
);
572 if (EC_GROUP_get_asn1_flag(group
)) {
574 * use the asn1 OID to describe the the elliptic curve parameters
576 tmp
= EC_GROUP_get_curve_name(group
);
579 if ((ret
->value
.named_curve
= OBJ_nid2obj(tmp
)) == NULL
)
582 /* we don't know the nid => ERROR */
585 /* use the ECPARAMETERS structure */
587 if ((ret
->value
.parameters
=
588 EC_GROUP_get_ecparameters(group
, NULL
)) == NULL
)
593 ECPKPARAMETERS_free(ret
);
599 EC_GROUP
*EC_GROUP_new_from_ecparameters(const ECPARAMETERS
*params
)
602 EC_GROUP
*ret
= NULL
;
603 BIGNUM
*p
= NULL
, *a
= NULL
, *b
= NULL
;
604 EC_POINT
*point
= NULL
;
607 if (!params
->fieldID
|| !params
->fieldID
->fieldType
||
608 !params
->fieldID
->p
.ptr
) {
609 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
613 /* now extract the curve parameters a and b */
614 if (!params
->curve
|| !params
->curve
->a
||
615 !params
->curve
->a
->data
|| !params
->curve
->b
||
616 !params
->curve
->b
->data
) {
617 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
620 a
= BN_bin2bn(params
->curve
->a
->data
, params
->curve
->a
->length
, NULL
);
622 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_BN_LIB
);
625 b
= BN_bin2bn(params
->curve
->b
->data
, params
->curve
->b
->length
, NULL
);
627 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_BN_LIB
);
631 /* get the field parameters */
632 tmp
= OBJ_obj2nid(params
->fieldID
->fieldType
);
633 if (tmp
== NID_X9_62_characteristic_two_field
)
634 #ifdef OPENSSL_NO_EC2M
636 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_GF2M_NOT_SUPPORTED
);
641 X9_62_CHARACTERISTIC_TWO
*char_two
;
643 char_two
= params
->fieldID
->p
.char_two
;
645 field_bits
= char_two
->m
;
646 if (field_bits
> OPENSSL_ECC_MAX_FIELD_BITS
) {
647 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_FIELD_TOO_LARGE
);
651 if ((p
= BN_new()) == NULL
) {
652 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_MALLOC_FAILURE
);
656 /* get the base type */
657 tmp
= OBJ_obj2nid(char_two
->type
);
659 if (tmp
== NID_X9_62_tpBasis
) {
662 if (!char_two
->p
.tpBasis
) {
663 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
667 tmp_long
= ASN1_INTEGER_get(char_two
->p
.tpBasis
);
669 if (!(char_two
->m
> tmp_long
&& tmp_long
> 0)) {
670 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
,
671 EC_R_INVALID_TRINOMIAL_BASIS
);
675 /* create the polynomial */
676 if (!BN_set_bit(p
, (int)char_two
->m
))
678 if (!BN_set_bit(p
, (int)tmp_long
))
680 if (!BN_set_bit(p
, 0))
682 } else if (tmp
== NID_X9_62_ppBasis
) {
683 X9_62_PENTANOMIAL
*penta
;
685 penta
= char_two
->p
.ppBasis
;
687 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
692 (char_two
->m
> penta
->k3
&& penta
->k3
> penta
->k2
693 && penta
->k2
> penta
->k1
&& penta
->k1
> 0)) {
694 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
,
695 EC_R_INVALID_PENTANOMIAL_BASIS
);
699 /* create the polynomial */
700 if (!BN_set_bit(p
, (int)char_two
->m
))
702 if (!BN_set_bit(p
, (int)penta
->k1
))
704 if (!BN_set_bit(p
, (int)penta
->k2
))
706 if (!BN_set_bit(p
, (int)penta
->k3
))
708 if (!BN_set_bit(p
, 0))
710 } else if (tmp
== NID_X9_62_onBasis
) {
711 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_NOT_IMPLEMENTED
);
715 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
719 /* create the EC_GROUP structure */
720 ret
= EC_GROUP_new_curve_GF2m(p
, a
, b
, NULL
);
723 else if (tmp
== NID_X9_62_prime_field
) {
724 /* we have a curve over a prime field */
725 /* extract the prime number */
726 if (!params
->fieldID
->p
.prime
) {
727 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
730 p
= ASN1_INTEGER_to_BN(params
->fieldID
->p
.prime
, NULL
);
732 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_ASN1_LIB
);
736 if (BN_is_negative(p
) || BN_is_zero(p
)) {
737 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_INVALID_FIELD
);
741 field_bits
= BN_num_bits(p
);
742 if (field_bits
> OPENSSL_ECC_MAX_FIELD_BITS
) {
743 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_FIELD_TOO_LARGE
);
747 /* create the EC_GROUP structure */
748 ret
= EC_GROUP_new_curve_GFp(p
, a
, b
, NULL
);
750 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_INVALID_FIELD
);
755 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_EC_LIB
);
759 /* extract seed (optional) */
760 if (params
->curve
->seed
!= NULL
) {
761 OPENSSL_free(ret
->seed
);
762 if ((ret
->seed
= OPENSSL_malloc(params
->curve
->seed
->length
)) == NULL
) {
763 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_MALLOC_FAILURE
);
766 memcpy(ret
->seed
, params
->curve
->seed
->data
,
767 params
->curve
->seed
->length
);
768 ret
->seed_len
= params
->curve
->seed
->length
;
771 if (!params
->order
|| !params
->base
|| !params
->base
->data
) {
772 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_ASN1_ERROR
);
776 if ((point
= EC_POINT_new(ret
)) == NULL
)
779 /* set the point conversion form */
780 EC_GROUP_set_point_conversion_form(ret
, (point_conversion_form_t
)
781 (params
->base
->data
[0] & ~0x01));
783 /* extract the ec point */
784 if (!EC_POINT_oct2point(ret
, point
, params
->base
->data
,
785 params
->base
->length
, NULL
)) {
786 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_EC_LIB
);
790 /* extract the order */
791 if ((a
= ASN1_INTEGER_to_BN(params
->order
, a
)) == NULL
) {
792 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_ASN1_LIB
);
795 if (BN_is_negative(a
) || BN_is_zero(a
)) {
796 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_INVALID_GROUP_ORDER
);
799 if (BN_num_bits(a
) > (int)field_bits
+ 1) { /* Hasse bound */
800 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, EC_R_INVALID_GROUP_ORDER
);
804 /* extract the cofactor (optional) */
805 if (params
->cofactor
== NULL
) {
808 } else if ((b
= ASN1_INTEGER_to_BN(params
->cofactor
, b
)) == NULL
) {
809 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_ASN1_LIB
);
812 /* set the generator, order and cofactor (if present) */
813 if (!EC_GROUP_set_generator(ret
, point
, a
, b
)) {
814 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS
, ERR_R_EC_LIB
);
822 EC_GROUP_clear_free(ret
);
829 EC_POINT_free(point
);
833 EC_GROUP
*EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS
*params
)
835 EC_GROUP
*ret
= NULL
;
838 if (params
== NULL
) {
839 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS
, EC_R_MISSING_PARAMETERS
);
843 if (params
->type
== 0) { /* the curve is given by an OID */
844 tmp
= OBJ_obj2nid(params
->value
.named_curve
);
845 if ((ret
= EC_GROUP_new_by_curve_name(tmp
)) == NULL
) {
846 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS
,
847 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE
);
850 EC_GROUP_set_asn1_flag(ret
, OPENSSL_EC_NAMED_CURVE
);
851 } else if (params
->type
== 1) { /* the parameters are given by a
852 * ECPARAMETERS structure */
853 ret
= EC_GROUP_new_from_ecparameters(params
->value
.parameters
);
855 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS
, ERR_R_EC_LIB
);
858 EC_GROUP_set_asn1_flag(ret
, 0x0);
859 } else if (params
->type
== 2) { /* implicitlyCA */
862 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS
, EC_R_ASN1_ERROR
);
869 /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
871 EC_GROUP
*d2i_ECPKParameters(EC_GROUP
**a
, const unsigned char **in
, long len
)
873 EC_GROUP
*group
= NULL
;
874 ECPKPARAMETERS
*params
= NULL
;
875 const unsigned char *p
= *in
;
877 if ((params
= d2i_ECPKPARAMETERS(NULL
, &p
, len
)) == NULL
) {
878 ECerr(EC_F_D2I_ECPKPARAMETERS
, EC_R_D2I_ECPKPARAMETERS_FAILURE
);
879 ECPKPARAMETERS_free(params
);
883 if ((group
= EC_GROUP_new_from_ecpkparameters(params
)) == NULL
) {
884 ECerr(EC_F_D2I_ECPKPARAMETERS
, EC_R_PKPARAMETERS2GROUP_FAILURE
);
885 ECPKPARAMETERS_free(params
);
890 EC_GROUP_clear_free(*a
);
894 ECPKPARAMETERS_free(params
);
899 int i2d_ECPKParameters(const EC_GROUP
*a
, unsigned char **out
)
902 ECPKPARAMETERS
*tmp
= EC_GROUP_get_ecpkparameters(a
, NULL
);
904 ECerr(EC_F_I2D_ECPKPARAMETERS
, EC_R_GROUP2PKPARAMETERS_FAILURE
);
907 if ((ret
= i2d_ECPKPARAMETERS(tmp
, out
)) == 0) {
908 ECerr(EC_F_I2D_ECPKPARAMETERS
, EC_R_I2D_ECPKPARAMETERS_FAILURE
);
909 ECPKPARAMETERS_free(tmp
);
912 ECPKPARAMETERS_free(tmp
);
916 /* some EC_KEY functions */
918 EC_KEY
*d2i_ECPrivateKey(EC_KEY
**a
, const unsigned char **in
, long len
)
921 EC_PRIVATEKEY
*priv_key
= NULL
;
922 const unsigned char *p
= *in
;
924 if ((priv_key
= d2i_EC_PRIVATEKEY(NULL
, &p
, len
)) == NULL
) {
925 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
929 if (a
== NULL
|| *a
== NULL
) {
930 if ((ret
= EC_KEY_new()) == NULL
) {
931 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
937 if (priv_key
->parameters
) {
938 EC_GROUP_clear_free(ret
->group
);
939 ret
->group
= EC_GROUP_new_from_ecpkparameters(priv_key
->parameters
);
942 if (ret
->group
== NULL
) {
943 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
947 ret
->version
= priv_key
->version
;
949 if (priv_key
->privateKey
) {
950 ASN1_OCTET_STRING
*pkey
= priv_key
->privateKey
;
951 if (EC_KEY_oct2priv(ret
, ASN1_STRING_get0_data(pkey
),
952 ASN1_STRING_length(pkey
)) == 0)
955 ECerr(EC_F_D2I_ECPRIVATEKEY
, EC_R_MISSING_PRIVATE_KEY
);
959 EC_POINT_clear_free(ret
->pub_key
);
960 ret
->pub_key
= EC_POINT_new(ret
->group
);
961 if (ret
->pub_key
== NULL
) {
962 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
966 if (priv_key
->publicKey
) {
967 const unsigned char *pub_oct
;
970 pub_oct
= ASN1_STRING_get0_data(priv_key
->publicKey
);
971 pub_oct_len
= ASN1_STRING_length(priv_key
->publicKey
);
972 if (!EC_KEY_oct2key(ret
, pub_oct
, pub_oct_len
, NULL
)) {
973 ECerr(EC_F_D2I_ECPRIVATEKEY
, ERR_R_EC_LIB
);
977 if (ret
->group
->meth
->keygenpub
== NULL
978 || ret
->group
->meth
->keygenpub(ret
) == 0)
980 /* Remember the original private-key-only encoding. */
981 ret
->enc_flag
|= EC_PKEY_NO_PUBKEY
;
986 EC_PRIVATEKEY_free(priv_key
);
991 if (a
== NULL
|| *a
!= ret
)
993 EC_PRIVATEKEY_free(priv_key
);
997 int i2d_ECPrivateKey(EC_KEY
*a
, unsigned char **out
)
1000 unsigned char *priv
= NULL
, *pub
= NULL
;
1001 size_t privlen
= 0, publen
= 0;
1003 EC_PRIVATEKEY
*priv_key
= NULL
;
1005 if (a
== NULL
|| a
->group
== NULL
||
1006 (!(a
->enc_flag
& EC_PKEY_NO_PUBKEY
) && a
->pub_key
== NULL
)) {
1007 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_PASSED_NULL_PARAMETER
);
1011 if ((priv_key
= EC_PRIVATEKEY_new()) == NULL
) {
1012 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1016 priv_key
->version
= a
->version
;
1018 privlen
= EC_KEY_priv2buf(a
, &priv
);
1021 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1025 ASN1_STRING_set0(priv_key
->privateKey
, priv
, privlen
);
1028 if (!(a
->enc_flag
& EC_PKEY_NO_PARAMETERS
)) {
1029 if ((priv_key
->parameters
=
1030 EC_GROUP_get_ecpkparameters(a
->group
,
1031 priv_key
->parameters
)) == NULL
) {
1032 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1037 if (!(a
->enc_flag
& EC_PKEY_NO_PUBKEY
)) {
1038 priv_key
->publicKey
= ASN1_BIT_STRING_new();
1039 if (priv_key
->publicKey
== NULL
) {
1040 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_MALLOC_FAILURE
);
1044 publen
= EC_KEY_key2buf(a
, a
->conv_form
, &pub
, NULL
);
1047 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1051 priv_key
->publicKey
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
| 0x07);
1052 priv_key
->publicKey
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
1053 ASN1_STRING_set0(priv_key
->publicKey
, pub
, publen
);
1057 if ((ret
= i2d_EC_PRIVATEKEY(priv_key
, out
)) == 0) {
1058 ECerr(EC_F_I2D_ECPRIVATEKEY
, ERR_R_EC_LIB
);
1063 OPENSSL_clear_free(priv
, privlen
);
1065 EC_PRIVATEKEY_free(priv_key
);
1066 return (ok
? ret
: 0);
1069 int i2d_ECParameters(EC_KEY
*a
, unsigned char **out
)
1072 ECerr(EC_F_I2D_ECPARAMETERS
, ERR_R_PASSED_NULL_PARAMETER
);
1075 return i2d_ECPKParameters(a
->group
, out
);
1078 EC_KEY
*d2i_ECParameters(EC_KEY
**a
, const unsigned char **in
, long len
)
1082 if (in
== NULL
|| *in
== NULL
) {
1083 ECerr(EC_F_D2I_ECPARAMETERS
, ERR_R_PASSED_NULL_PARAMETER
);
1087 if (a
== NULL
|| *a
== NULL
) {
1088 if ((ret
= EC_KEY_new()) == NULL
) {
1089 ECerr(EC_F_D2I_ECPARAMETERS
, ERR_R_MALLOC_FAILURE
);
1095 if (!d2i_ECPKParameters(&ret
->group
, in
, len
)) {
1096 ECerr(EC_F_D2I_ECPARAMETERS
, ERR_R_EC_LIB
);
1097 if (a
== NULL
|| *a
!= ret
)
1108 EC_KEY
*o2i_ECPublicKey(EC_KEY
**a
, const unsigned char **in
, long len
)
1112 if (a
== NULL
|| (*a
) == NULL
|| (*a
)->group
== NULL
) {
1114 * sorry, but a EC_GROUP-structure is necessary to set the public key
1116 ECerr(EC_F_O2I_ECPUBLICKEY
, ERR_R_PASSED_NULL_PARAMETER
);
1120 if (!EC_KEY_oct2key(ret
, *in
, len
, NULL
)) {
1121 ECerr(EC_F_O2I_ECPUBLICKEY
, ERR_R_EC_LIB
);
1128 int i2o_ECPublicKey(const EC_KEY
*a
, unsigned char **out
)
1134 ECerr(EC_F_I2O_ECPUBLICKEY
, ERR_R_PASSED_NULL_PARAMETER
);
1138 buf_len
= EC_POINT_point2oct(a
->group
, a
->pub_key
,
1139 a
->conv_form
, NULL
, 0, NULL
);
1141 if (out
== NULL
|| buf_len
== 0)
1142 /* out == NULL => just return the length of the octet string */
1146 if ((*out
= OPENSSL_malloc(buf_len
)) == NULL
) {
1147 ECerr(EC_F_I2O_ECPUBLICKEY
, ERR_R_MALLOC_FAILURE
);
1152 if (!EC_POINT_point2oct(a
->group
, a
->pub_key
, a
->conv_form
,
1153 *out
, buf_len
, NULL
)) {
1154 ECerr(EC_F_I2O_ECPUBLICKEY
, ERR_R_EC_LIB
);
1166 ASN1_SEQUENCE(ECDSA_SIG
) = {
1167 ASN1_SIMPLE(ECDSA_SIG
, r
, CBIGNUM
),
1168 ASN1_SIMPLE(ECDSA_SIG
, s
, CBIGNUM
)
1169 } static_ASN1_SEQUENCE_END(ECDSA_SIG
)
1171 DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG
)
1172 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG
, ECDSA_SIG
)
1173 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSA_SIG
, ECDSA_SIG
, ECDSA_SIG
)
1175 ECDSA_SIG
*ECDSA_SIG_new(void)
1177 ECDSA_SIG
*sig
= OPENSSL_zalloc(sizeof(*sig
));
1179 ECerr(EC_F_ECDSA_SIG_NEW
, ERR_R_MALLOC_FAILURE
);
1183 void ECDSA_SIG_free(ECDSA_SIG
*sig
)
1187 BN_clear_free(sig
->r
);
1188 BN_clear_free(sig
->s
);
1192 void ECDSA_SIG_get0(const ECDSA_SIG
*sig
, const BIGNUM
**pr
, const BIGNUM
**ps
)
1200 int ECDSA_SIG_set0(ECDSA_SIG
*sig
, BIGNUM
*r
, BIGNUM
*s
)
1202 if (r
== NULL
|| s
== NULL
)
1204 BN_clear_free(sig
->r
);
1205 BN_clear_free(sig
->s
);
1211 int ECDSA_size(const EC_KEY
*r
)
1215 unsigned char buf
[4];
1216 const EC_GROUP
*group
;
1220 group
= EC_KEY_get0_group(r
);
1224 i
= EC_GROUP_order_bits(group
);
1227 bs
.length
= (i
+ 7) / 8;
1229 bs
.type
= V_ASN1_INTEGER
;
1230 /* If the top bit is set the asn1 encoding is 1 larger. */
1233 i
= i2d_ASN1_INTEGER(&bs
, NULL
);
1234 i
+= i
; /* r and s */
1235 ret
= ASN1_object_size(1, i
, V_ASN1_SEQUENCE
);