2 * Written by Nils Larsch for the OpenSSL project.
4 /* ====================================================================
5 * Copyright (c) 2000-2003 The OpenSSL Project. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgment:
21 * "This product includes software developed by the OpenSSL Project
22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 * endorse or promote products derived from this software without
26 * prior written permission. For written permission, please contact
27 * licensing@OpenSSL.org.
29 * 5. Products derived from this software may not be called "OpenSSL"
30 * nor may "OpenSSL" appear in their names without prior written
31 * permission of the OpenSSL Project.
33 * 6. Redistributions of any form whatsoever must retain the following
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
52 * This product includes cryptographic software written by Eric Young
53 * (eay@cryptsoft.com). This product includes software written by Tim
54 * Hudson (tjh@cryptsoft.com).
60 #include <openssl/err.h>
61 #include <openssl/asn1t.h>
62 #include <openssl/objects.h>
64 int EC_GROUP_get_basis_type(const EC_GROUP *group)
68 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
69 NID_X9_62_characteristic_two_field)
70 /* everything else is currently not supported */
73 while (group->poly[i] != 0)
77 return NID_X9_62_ppBasis;
79 return NID_X9_62_tpBasis;
81 /* everything else is currently not supported */
85 #ifndef OPENSSL_NO_EC2M
86 int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k)
91 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
92 NID_X9_62_characteristic_two_field
93 || !((group->poly[0] != 0) && (group->poly[1] != 0)
94 && (group->poly[2] == 0))) {
95 ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS,
96 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
106 int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1,
107 unsigned int *k2, unsigned int *k3)
112 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
113 NID_X9_62_characteristic_two_field
114 || !((group->poly[0] != 0) && (group->poly[1] != 0)
115 && (group->poly[2] != 0) && (group->poly[3] != 0)
116 && (group->poly[4] == 0))) {
117 ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS,
118 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
123 *k1 = group->poly[3];
125 *k2 = group->poly[2];
127 *k3 = group->poly[1];
133 /* some structures needed for the asn1 encoding */
134 typedef struct x9_62_pentanomial_st {
140 typedef struct x9_62_characteristic_two_st {
145 /* NID_X9_62_onBasis */
147 /* NID_X9_62_tpBasis */
148 ASN1_INTEGER *tpBasis;
149 /* NID_X9_62_ppBasis */
150 X9_62_PENTANOMIAL *ppBasis;
154 } X9_62_CHARACTERISTIC_TWO;
156 typedef struct x9_62_fieldid_st {
157 ASN1_OBJECT *fieldType;
160 /* NID_X9_62_prime_field */
162 /* NID_X9_62_characteristic_two_field */
163 X9_62_CHARACTERISTIC_TWO *char_two;
169 typedef struct x9_62_curve_st {
170 ASN1_OCTET_STRING *a;
171 ASN1_OCTET_STRING *b;
172 ASN1_BIT_STRING *seed;
175 struct ec_parameters_st {
177 X9_62_FIELDID *fieldID;
179 ASN1_OCTET_STRING *base;
181 ASN1_INTEGER *cofactor;
182 } /* ECPARAMETERS */ ;
184 struct ecpk_parameters_st {
187 ASN1_OBJECT *named_curve;
188 ECPARAMETERS *parameters;
189 ASN1_NULL *implicitlyCA;
191 } /* ECPKPARAMETERS */ ;
193 /* SEC1 ECPrivateKey */
194 typedef struct ec_privatekey_st {
196 ASN1_OCTET_STRING *privateKey;
197 ECPKPARAMETERS *parameters;
198 ASN1_BIT_STRING *publicKey;
201 /* the OpenSSL ASN.1 definitions */
202 ASN1_SEQUENCE(X9_62_PENTANOMIAL) = {
203 ASN1_SIMPLE(X9_62_PENTANOMIAL, k1, LONG),
204 ASN1_SIMPLE(X9_62_PENTANOMIAL, k2, LONG),
205 ASN1_SIMPLE(X9_62_PENTANOMIAL, k3, LONG)
206 } static_ASN1_SEQUENCE_END(X9_62_PENTANOMIAL)
208 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
209 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
211 ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY);
213 ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = {
214 ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)),
215 ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)),
216 ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL))
217 } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL);
219 ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = {
220 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, LONG),
221 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT),
222 ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO)
223 } static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO)
225 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
226 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
228 ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY);
230 ASN1_ADB(X9_62_FIELDID) = {
231 ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)),
232 ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO))
233 } ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL);
235 ASN1_SEQUENCE(X9_62_FIELDID) = {
236 ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
237 ASN1_ADB_OBJECT(X9_62_FIELDID)
238 } static_ASN1_SEQUENCE_END(X9_62_FIELDID)
240 ASN1_SEQUENCE(X9_62_CURVE) = {
241 ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING),
242 ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING),
243 ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING)
244 } static_ASN1_SEQUENCE_END(X9_62_CURVE)
246 ASN1_SEQUENCE(ECPARAMETERS) = {
247 ASN1_SIMPLE(ECPARAMETERS, version, LONG),
248 ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID),
249 ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE),
250 ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING),
251 ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER),
252 ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER)
253 } ASN1_SEQUENCE_END(ECPARAMETERS)
255 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
256 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
258 ASN1_CHOICE(ECPKPARAMETERS) = {
259 ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT),
260 ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS),
261 ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL)
262 } ASN1_CHOICE_END(ECPKPARAMETERS)
264 DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
265 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS)
266 IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
268 ASN1_SEQUENCE(EC_PRIVATEKEY) = {
269 ASN1_SIMPLE(EC_PRIVATEKEY, version, LONG),
270 ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING),
271 ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0),
272 ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1)
273 } static_ASN1_SEQUENCE_END(EC_PRIVATEKEY)
275 DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
276 DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY)
277 IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
279 /* some declarations of internal function */
281 /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */
282 static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *);
283 /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */
284 static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *);
286 /* the function definitions */
288 static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field)
293 if (group == NULL || field == NULL)
296 /* clear the old values (if necessary) */
297 ASN1_OBJECT_free(field->fieldType);
298 ASN1_TYPE_free(field->p.other);
300 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
301 /* set OID for the field */
302 if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) {
303 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
307 if (nid == NID_X9_62_prime_field) {
308 if ((tmp = BN_new()) == NULL) {
309 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
312 /* the parameters are specified by the prime number p */
313 if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL)) {
314 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
317 /* set the prime number */
318 field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL);
319 if (field->p.prime == NULL) {
320 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
323 } else if (nid == NID_X9_62_characteristic_two_field)
324 #ifdef OPENSSL_NO_EC2M
326 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED);
332 X9_62_CHARACTERISTIC_TWO *char_two;
334 field->p.char_two = X9_62_CHARACTERISTIC_TWO_new();
335 char_two = field->p.char_two;
337 if (char_two == NULL) {
338 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
342 char_two->m = (long)EC_GROUP_get_degree(group);
344 field_type = EC_GROUP_get_basis_type(group);
346 if (field_type == 0) {
347 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
350 /* set base type OID */
351 if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) {
352 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
356 if (field_type == NID_X9_62_tpBasis) {
359 if (!EC_GROUP_get_trinomial_basis(group, &k))
362 char_two->p.tpBasis = ASN1_INTEGER_new();
363 if (char_two->p.tpBasis == NULL) {
364 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
367 if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) {
368 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
371 } else if (field_type == NID_X9_62_ppBasis) {
372 unsigned int k1, k2, k3;
374 if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3))
377 char_two->p.ppBasis = X9_62_PENTANOMIAL_new();
378 if (char_two->p.ppBasis == NULL) {
379 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
384 char_two->p.ppBasis->k1 = (long)k1;
385 char_two->p.ppBasis->k2 = (long)k2;
386 char_two->p.ppBasis->k3 = (long)k3;
387 } else { /* field_type == NID_X9_62_onBasis */
389 /* for ONB the parameters are (asn1) NULL */
390 char_two->p.onBasis = ASN1_NULL_new();
391 if (char_two->p.onBasis == NULL) {
392 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
399 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_UNSUPPORTED_FIELD);
410 static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve)
413 BIGNUM *tmp_1 = NULL, *tmp_2 = NULL;
414 unsigned char *buffer_1 = NULL, *buffer_2 = NULL,
415 *a_buf = NULL, *b_buf = NULL;
417 unsigned char char_zero = 0;
419 if (!group || !curve || !curve->a || !curve->b)
422 if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) {
423 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
427 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
430 if (nid == NID_X9_62_prime_field) {
431 if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL)) {
432 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
436 #ifndef OPENSSL_NO_EC2M
437 else { /* nid == NID_X9_62_characteristic_two_field */
439 if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL)) {
440 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
445 len_1 = (size_t)BN_num_bytes(tmp_1);
446 len_2 = (size_t)BN_num_bytes(tmp_2);
449 /* len_1 == 0 => a == 0 */
453 if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL) {
454 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
457 if ((len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0) {
458 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
465 /* len_2 == 0 => b == 0 */
469 if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL) {
470 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
473 if ((len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0) {
474 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
481 if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) ||
482 !ASN1_OCTET_STRING_set(curve->b, b_buf, len_2)) {
483 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
487 /* set the seed (optional) */
490 if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) {
491 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
494 curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
495 curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT;
496 if (!ASN1_BIT_STRING_set(curve->seed, group->seed,
497 (int)group->seed_len)) {
498 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
502 ASN1_BIT_STRING_free(curve->seed);
509 OPENSSL_free(buffer_1);
510 OPENSSL_free(buffer_2);
516 ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group,
517 ECPARAMETERS *params)
520 ECPARAMETERS *ret = NULL;
522 unsigned char *buffer = NULL;
523 const EC_POINT *point = NULL;
524 point_conversion_form_t form;
526 if (params == NULL) {
527 if ((ret = ECPARAMETERS_new()) == NULL) {
528 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
534 /* set the version (always one) */
535 ret->version = (long)0x1;
537 /* set the fieldID */
538 if (!ec_asn1_group2fieldid(group, ret->fieldID)) {
539 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
544 if (!ec_asn1_group2curve(group, ret->curve)) {
545 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
549 /* set the base point */
550 if ((point = EC_GROUP_get0_generator(group)) == NULL) {
551 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, EC_R_UNDEFINED_GENERATOR);
555 form = EC_GROUP_get_point_conversion_form(group);
557 len = EC_POINT_point2buf(group, point, form, &buffer, NULL);
559 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
562 if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) {
563 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
566 if (!ASN1_OCTET_STRING_set(ret->base, buffer, len)) {
567 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
572 tmp = EC_GROUP_get0_order(group);
574 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
577 ret->order = BN_to_ASN1_INTEGER(tmp, ret->order);
578 if (ret->order == NULL) {
579 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
583 /* set the cofactor (optional) */
584 tmp = EC_GROUP_get0_cofactor(group);
586 ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor);
587 if (ret->cofactor == NULL) {
588 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
597 ECPARAMETERS_free(ret);
598 OPENSSL_free(buffer);
602 ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group,
603 ECPKPARAMETERS *params)
606 ECPKPARAMETERS *ret = params;
609 if ((ret = ECPKPARAMETERS_new()) == NULL) {
610 ECerr(EC_F_EC_GROUP_GET_ECPKPARAMETERS, ERR_R_MALLOC_FAILURE);
615 ASN1_OBJECT_free(ret->value.named_curve);
616 else if (ret->type == 1 && ret->value.parameters)
617 ECPARAMETERS_free(ret->value.parameters);
620 if (EC_GROUP_get_asn1_flag(group)) {
622 * use the asn1 OID to describe the the elliptic curve parameters
624 tmp = EC_GROUP_get_curve_name(group);
627 if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
630 /* we don't know the nid => ERROR */
633 /* use the ECPARAMETERS structure */
635 if ((ret->value.parameters =
636 EC_GROUP_get_ecparameters(group, NULL)) == NULL)
641 ECPKPARAMETERS_free(ret);
647 EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params)
650 EC_GROUP *ret = NULL;
651 BIGNUM *p = NULL, *a = NULL, *b = NULL;
652 EC_POINT *point = NULL;
655 if (!params->fieldID || !params->fieldID->fieldType ||
656 !params->fieldID->p.ptr) {
657 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
661 /* now extract the curve parameters a and b */
662 if (!params->curve || !params->curve->a ||
663 !params->curve->a->data || !params->curve->b ||
664 !params->curve->b->data) {
665 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
668 a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL);
670 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB);
673 b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL);
675 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB);
679 /* get the field parameters */
680 tmp = OBJ_obj2nid(params->fieldID->fieldType);
681 if (tmp == NID_X9_62_characteristic_two_field)
682 #ifdef OPENSSL_NO_EC2M
684 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_GF2M_NOT_SUPPORTED);
689 X9_62_CHARACTERISTIC_TWO *char_two;
691 char_two = params->fieldID->p.char_two;
693 field_bits = char_two->m;
694 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
695 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE);
699 if ((p = BN_new()) == NULL) {
700 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
704 /* get the base type */
705 tmp = OBJ_obj2nid(char_two->type);
707 if (tmp == NID_X9_62_tpBasis) {
710 if (!char_two->p.tpBasis) {
711 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
715 tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis);
717 if (!(char_two->m > tmp_long && tmp_long > 0)) {
718 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS,
719 EC_R_INVALID_TRINOMIAL_BASIS);
723 /* create the polynomial */
724 if (!BN_set_bit(p, (int)char_two->m))
726 if (!BN_set_bit(p, (int)tmp_long))
728 if (!BN_set_bit(p, 0))
730 } else if (tmp == NID_X9_62_ppBasis) {
731 X9_62_PENTANOMIAL *penta;
733 penta = char_two->p.ppBasis;
735 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
740 (char_two->m > penta->k3 && penta->k3 > penta->k2
741 && penta->k2 > penta->k1 && penta->k1 > 0)) {
742 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS,
743 EC_R_INVALID_PENTANOMIAL_BASIS);
747 /* create the polynomial */
748 if (!BN_set_bit(p, (int)char_two->m))
750 if (!BN_set_bit(p, (int)penta->k1))
752 if (!BN_set_bit(p, (int)penta->k2))
754 if (!BN_set_bit(p, (int)penta->k3))
756 if (!BN_set_bit(p, 0))
758 } else if (tmp == NID_X9_62_onBasis) {
759 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_NOT_IMPLEMENTED);
763 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
767 /* create the EC_GROUP structure */
768 ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL);
771 else if (tmp == NID_X9_62_prime_field) {
772 /* we have a curve over a prime field */
773 /* extract the prime number */
774 if (!params->fieldID->p.prime) {
775 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
778 p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL);
780 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
784 if (BN_is_negative(p) || BN_is_zero(p)) {
785 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD);
789 field_bits = BN_num_bits(p);
790 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
791 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE);
795 /* create the EC_GROUP structure */
796 ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
798 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD);
803 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
807 /* extract seed (optional) */
808 if (params->curve->seed != NULL) {
809 OPENSSL_free(ret->seed);
810 if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL) {
811 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
814 memcpy(ret->seed, params->curve->seed->data,
815 params->curve->seed->length);
816 ret->seed_len = params->curve->seed->length;
819 if (!params->order || !params->base || !params->base->data) {
820 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
824 if ((point = EC_POINT_new(ret)) == NULL)
827 /* set the point conversion form */
828 EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t)
829 (params->base->data[0] & ~0x01));
831 /* extract the ec point */
832 if (!EC_POINT_oct2point(ret, point, params->base->data,
833 params->base->length, NULL)) {
834 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
838 /* extract the order */
839 if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) {
840 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
843 if (BN_is_negative(a) || BN_is_zero(a)) {
844 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER);
847 if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */
848 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER);
852 /* extract the cofactor (optional) */
853 if (params->cofactor == NULL) {
856 } else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) {
857 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
860 /* set the generator, order and cofactor (if present) */
861 if (!EC_GROUP_set_generator(ret, point, a, b)) {
862 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
870 EC_GROUP_clear_free(ret);
877 EC_POINT_free(point);
881 EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params)
883 EC_GROUP *ret = NULL;
886 if (params == NULL) {
887 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_MISSING_PARAMETERS);
891 if (params->type == 0) { /* the curve is given by an OID */
892 tmp = OBJ_obj2nid(params->value.named_curve);
893 if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) {
894 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS,
895 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
898 EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE);
899 } else if (params->type == 1) { /* the parameters are given by a
900 * ECPARAMETERS structure */
901 ret = EC_GROUP_new_from_ecparameters(params->value.parameters);
903 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, ERR_R_EC_LIB);
906 EC_GROUP_set_asn1_flag(ret, 0x0);
907 } else if (params->type == 2) { /* implicitlyCA */
910 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_ASN1_ERROR);
917 /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
919 EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len)
921 EC_GROUP *group = NULL;
922 ECPKPARAMETERS *params = NULL;
923 const unsigned char *p = *in;
925 if ((params = d2i_ECPKPARAMETERS(NULL, &p, len)) == NULL) {
926 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
927 ECPKPARAMETERS_free(params);
931 if ((group = EC_GROUP_new_from_ecpkparameters(params)) == NULL) {
932 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
933 ECPKPARAMETERS_free(params);
938 EC_GROUP_clear_free(*a);
942 ECPKPARAMETERS_free(params);
947 int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out)
950 ECPKPARAMETERS *tmp = EC_GROUP_get_ecpkparameters(a, NULL);
952 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE);
955 if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) {
956 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE);
957 ECPKPARAMETERS_free(tmp);
960 ECPKPARAMETERS_free(tmp);
964 /* some EC_KEY functions */
966 EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len)
969 EC_PRIVATEKEY *priv_key = NULL;
970 const unsigned char *p = *in;
972 if ((priv_key = d2i_EC_PRIVATEKEY(NULL, &p, len)) == NULL) {
973 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
977 if (a == NULL || *a == NULL) {
978 if ((ret = EC_KEY_new()) == NULL) {
979 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
985 if (priv_key->parameters) {
986 EC_GROUP_clear_free(ret->group);
987 ret->group = EC_GROUP_new_from_ecpkparameters(priv_key->parameters);
990 if (ret->group == NULL) {
991 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
995 ret->version = priv_key->version;
997 if (priv_key->privateKey) {
998 ASN1_OCTET_STRING *pkey = priv_key->privateKey;
999 if (EC_KEY_oct2priv(ret, ASN1_STRING_data(pkey),
1000 ASN1_STRING_length(pkey)) == 0)
1003 ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY);
1007 EC_POINT_clear_free(ret->pub_key);
1008 ret->pub_key = EC_POINT_new(ret->group);
1009 if (ret->pub_key == NULL) {
1010 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1014 if (priv_key->publicKey) {
1015 const unsigned char *pub_oct;
1018 pub_oct = ASN1_STRING_data(priv_key->publicKey);
1019 pub_oct_len = ASN1_STRING_length(priv_key->publicKey);
1020 if (!EC_KEY_oct2key(ret, pub_oct, pub_oct_len, NULL)) {
1021 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1025 if (ret->group->meth->keygenpub == NULL
1026 || ret->group->meth->keygenpub(ret) == 0)
1028 /* Remember the original private-key-only encoding. */
1029 ret->enc_flag |= EC_PKEY_NO_PUBKEY;
1034 EC_PRIVATEKEY_free(priv_key);
1039 if (a == NULL || *a != ret)
1041 EC_PRIVATEKEY_free(priv_key);
1045 int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out)
1047 int ret = 0, ok = 0;
1048 unsigned char *priv= NULL, *pub= NULL;
1049 size_t privlen = 0, publen = 0;
1051 EC_PRIVATEKEY *priv_key = NULL;
1053 if (a == NULL || a->group == NULL ||
1054 (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) {
1055 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
1059 if ((priv_key = EC_PRIVATEKEY_new()) == NULL) {
1060 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1064 priv_key->version = a->version;
1066 privlen = EC_KEY_priv2buf(a, &priv);
1069 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1073 ASN1_STRING_set0(priv_key->privateKey, priv, privlen);
1076 if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) {
1077 if ((priv_key->parameters =
1078 EC_GROUP_get_ecpkparameters(a->group,
1079 priv_key->parameters)) == NULL) {
1080 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1085 if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) {
1086 priv_key->publicKey = ASN1_BIT_STRING_new();
1087 if (priv_key->publicKey == NULL) {
1088 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1092 publen = EC_KEY_key2buf(a, a->conv_form, &pub, NULL);
1095 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1099 priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
1100 priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
1101 ASN1_STRING_set0(priv_key->publicKey, pub, publen);
1105 if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) {
1106 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1111 OPENSSL_clear_free(priv, privlen);
1113 EC_PRIVATEKEY_free(priv_key);
1114 return (ok ? ret : 0);
1117 int i2d_ECParameters(EC_KEY *a, unsigned char **out)
1120 ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1123 return i2d_ECPKParameters(a->group, out);
1126 EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len)
1130 if (in == NULL || *in == NULL) {
1131 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1135 if (a == NULL || *a == NULL) {
1136 if ((ret = EC_KEY_new()) == NULL) {
1137 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
1143 if (!d2i_ECPKParameters(&ret->group, in, len)) {
1144 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
1145 if (a == NULL || *a != ret)
1156 EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len)
1160 if (a == NULL || (*a) == NULL || (*a)->group == NULL) {
1162 * sorry, but a EC_GROUP-structure is necessary to set the public key
1164 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1168 if (!EC_KEY_oct2key(ret, *in, len, NULL)) {
1169 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB);
1176 int i2o_ECPublicKey(EC_KEY *a, unsigned char **out)
1182 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1186 buf_len = EC_POINT_point2oct(a->group, a->pub_key,
1187 a->conv_form, NULL, 0, NULL);
1189 if (out == NULL || buf_len == 0)
1190 /* out == NULL => just return the length of the octet string */
1194 if ((*out = OPENSSL_malloc(buf_len)) == NULL) {
1195 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
1200 if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form,
1201 *out, buf_len, NULL)) {
1202 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB);
1214 ASN1_SEQUENCE(ECDSA_SIG) = {
1215 ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM),
1216 ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM)
1217 } static_ASN1_SEQUENCE_END(ECDSA_SIG)
1219 DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG)
1220 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG)
1221 IMPLEMENT_ASN1_FUNCTIONS_const(ECDSA_SIG)
1223 void ECDSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, ECDSA_SIG *sig)
1231 int ECDSA_size(const EC_KEY *r)
1235 unsigned char buf[4];
1236 const EC_GROUP *group;
1240 group = EC_KEY_get0_group(r);
1244 i = EC_GROUP_order_bits(group);
1247 bs.length = (i + 7) / 8;
1249 bs.type = V_ASN1_INTEGER;
1250 /* If the top bit is set the asn1 encoding is 1 larger. */
1253 i = i2d_ASN1_INTEGER(&bs, NULL);
1254 i += i; /* r and s */
1255 ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);