2 * Copyright 2002-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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"
16 #include "internal/asn1_dsa.h"
18 int EC_GROUP_get_basis_type(const EC_GROUP *group)
22 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
23 NID_X9_62_characteristic_two_field)
24 /* everything else is currently not supported */
27 /* Find the last non-zero element of group->poly[] */
29 i < (int)OSSL_NELEM(group->poly) && group->poly[i] != 0;
34 return NID_X9_62_ppBasis;
36 return NID_X9_62_tpBasis;
38 /* everything else is currently not supported */
42 #ifndef OPENSSL_NO_EC2M
43 int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k)
48 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
49 NID_X9_62_characteristic_two_field
50 || !((group->poly[0] != 0) && (group->poly[1] != 0)
51 && (group->poly[2] == 0))) {
52 ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS,
53 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
63 int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1,
64 unsigned int *k2, unsigned int *k3)
69 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
70 NID_X9_62_characteristic_two_field
71 || !((group->poly[0] != 0) && (group->poly[1] != 0)
72 && (group->poly[2] != 0) && (group->poly[3] != 0)
73 && (group->poly[4] == 0))) {
74 ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS,
75 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
90 /* some structures needed for the asn1 encoding */
91 typedef struct x9_62_pentanomial_st {
97 typedef struct x9_62_characteristic_two_st {
102 /* NID_X9_62_onBasis */
104 /* NID_X9_62_tpBasis */
105 ASN1_INTEGER *tpBasis;
106 /* NID_X9_62_ppBasis */
107 X9_62_PENTANOMIAL *ppBasis;
111 } X9_62_CHARACTERISTIC_TWO;
113 typedef struct x9_62_fieldid_st {
114 ASN1_OBJECT *fieldType;
117 /* NID_X9_62_prime_field */
119 /* NID_X9_62_characteristic_two_field */
120 X9_62_CHARACTERISTIC_TWO *char_two;
126 typedef struct x9_62_curve_st {
127 ASN1_OCTET_STRING *a;
128 ASN1_OCTET_STRING *b;
129 ASN1_BIT_STRING *seed;
132 struct ec_parameters_st {
134 X9_62_FIELDID *fieldID;
136 ASN1_OCTET_STRING *base;
138 ASN1_INTEGER *cofactor;
139 } /* ECPARAMETERS */ ;
141 struct ecpk_parameters_st {
144 ASN1_OBJECT *named_curve;
145 ECPARAMETERS *parameters;
146 ASN1_NULL *implicitlyCA;
148 } /* ECPKPARAMETERS */ ;
150 /* SEC1 ECPrivateKey */
151 typedef struct ec_privatekey_st {
153 ASN1_OCTET_STRING *privateKey;
154 ECPKPARAMETERS *parameters;
155 ASN1_BIT_STRING *publicKey;
158 /* the OpenSSL ASN.1 definitions */
159 ASN1_SEQUENCE(X9_62_PENTANOMIAL) = {
160 ASN1_EMBED(X9_62_PENTANOMIAL, k1, INT32),
161 ASN1_EMBED(X9_62_PENTANOMIAL, k2, INT32),
162 ASN1_EMBED(X9_62_PENTANOMIAL, k3, INT32)
163 } static_ASN1_SEQUENCE_END(X9_62_PENTANOMIAL)
165 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
166 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
168 ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY);
170 ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = {
171 ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)),
172 ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)),
173 ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL))
174 } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL);
176 ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = {
177 ASN1_EMBED(X9_62_CHARACTERISTIC_TWO, m, INT32),
178 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT),
179 ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO)
180 } static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO)
182 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
183 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
185 ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY);
187 ASN1_ADB(X9_62_FIELDID) = {
188 ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)),
189 ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO))
190 } ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL);
192 ASN1_SEQUENCE(X9_62_FIELDID) = {
193 ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
194 ASN1_ADB_OBJECT(X9_62_FIELDID)
195 } static_ASN1_SEQUENCE_END(X9_62_FIELDID)
197 ASN1_SEQUENCE(X9_62_CURVE) = {
198 ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING),
199 ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING),
200 ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING)
201 } static_ASN1_SEQUENCE_END(X9_62_CURVE)
203 ASN1_SEQUENCE(ECPARAMETERS) = {
204 ASN1_EMBED(ECPARAMETERS, version, INT32),
205 ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID),
206 ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE),
207 ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING),
208 ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER),
209 ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER)
210 } ASN1_SEQUENCE_END(ECPARAMETERS)
212 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
213 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
215 ASN1_CHOICE(ECPKPARAMETERS) = {
216 ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT),
217 ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS),
218 ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL)
219 } ASN1_CHOICE_END(ECPKPARAMETERS)
221 DECLARE_ASN1_FUNCTIONS(ECPKPARAMETERS)
222 DECLARE_ASN1_ENCODE_FUNCTIONS_name(ECPKPARAMETERS, ECPKPARAMETERS)
223 IMPLEMENT_ASN1_FUNCTIONS(ECPKPARAMETERS)
225 ASN1_SEQUENCE(EC_PRIVATEKEY) = {
226 ASN1_EMBED(EC_PRIVATEKEY, version, INT32),
227 ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING),
228 ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0),
229 ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1)
230 } static_ASN1_SEQUENCE_END(EC_PRIVATEKEY)
232 DECLARE_ASN1_FUNCTIONS(EC_PRIVATEKEY)
233 DECLARE_ASN1_ENCODE_FUNCTIONS_name(EC_PRIVATEKEY, EC_PRIVATEKEY)
234 IMPLEMENT_ASN1_FUNCTIONS(EC_PRIVATEKEY)
236 /* some declarations of internal function */
238 /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */
239 static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *);
240 /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */
241 static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *);
243 /* the function definitions */
245 static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field)
250 if (group == NULL || field == NULL)
253 /* clear the old values (if necessary) */
254 ASN1_OBJECT_free(field->fieldType);
255 ASN1_TYPE_free(field->p.other);
257 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
258 /* set OID for the field */
259 if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) {
260 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
264 if (nid == NID_X9_62_prime_field) {
265 if ((tmp = BN_new()) == NULL) {
266 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
269 /* the parameters are specified by the prime number p */
270 if (!EC_GROUP_get_curve(group, tmp, NULL, NULL, NULL)) {
271 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
274 /* set the prime number */
275 field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL);
276 if (field->p.prime == NULL) {
277 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
280 } else if (nid == NID_X9_62_characteristic_two_field)
281 #ifdef OPENSSL_NO_EC2M
283 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED);
289 X9_62_CHARACTERISTIC_TWO *char_two;
291 field->p.char_two = X9_62_CHARACTERISTIC_TWO_new();
292 char_two = field->p.char_two;
294 if (char_two == NULL) {
295 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
299 char_two->m = (long)EC_GROUP_get_degree(group);
301 field_type = EC_GROUP_get_basis_type(group);
303 if (field_type == 0) {
304 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
307 /* set base type OID */
308 if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) {
309 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
313 if (field_type == NID_X9_62_tpBasis) {
316 if (!EC_GROUP_get_trinomial_basis(group, &k))
319 char_two->p.tpBasis = ASN1_INTEGER_new();
320 if (char_two->p.tpBasis == NULL) {
321 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
324 if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) {
325 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
328 } else if (field_type == NID_X9_62_ppBasis) {
329 unsigned int k1, k2, k3;
331 if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3))
334 char_two->p.ppBasis = X9_62_PENTANOMIAL_new();
335 if (char_two->p.ppBasis == NULL) {
336 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
341 char_two->p.ppBasis->k1 = (long)k1;
342 char_two->p.ppBasis->k2 = (long)k2;
343 char_two->p.ppBasis->k3 = (long)k3;
344 } else { /* field_type == NID_X9_62_onBasis */
346 /* for ONB the parameters are (asn1) NULL */
347 char_two->p.onBasis = ASN1_NULL_new();
348 if (char_two->p.onBasis == NULL) {
349 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
356 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_UNSUPPORTED_FIELD);
367 static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve)
370 BIGNUM *tmp_1 = NULL, *tmp_2 = NULL;
371 unsigned char *a_buf = NULL, *b_buf = NULL;
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);
383 if (!EC_GROUP_get_curve(group, NULL, tmp_1, tmp_2, NULL)) {
384 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
389 * Per SEC 1, the curve coefficients must be padded up to size. See C.2's
390 * definition of Curve, C.1's definition of FieldElement, and 2.3.5's
391 * definition of how to encode the field elements.
393 len = ((size_t)EC_GROUP_get_degree(group) + 7) / 8;
394 if ((a_buf = OPENSSL_malloc(len)) == NULL
395 || (b_buf = OPENSSL_malloc(len)) == NULL) {
396 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
399 if (BN_bn2binpad(tmp_1, a_buf, len) < 0
400 || BN_bn2binpad(tmp_2, b_buf, len) < 0) {
401 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
406 if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len)
407 || !ASN1_OCTET_STRING_set(curve->b, b_buf, len)) {
408 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
412 /* set the seed (optional) */
415 if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) {
416 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
419 curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
420 curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT;
421 if (!ASN1_BIT_STRING_set(curve->seed, group->seed,
422 (int)group->seed_len)) {
423 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
427 ASN1_BIT_STRING_free(curve->seed);
441 ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group,
442 ECPARAMETERS *params)
445 ECPARAMETERS *ret = NULL;
447 unsigned char *buffer = NULL;
448 const EC_POINT *point = NULL;
449 point_conversion_form_t form;
451 if (params == NULL) {
452 if ((ret = ECPARAMETERS_new()) == NULL) {
453 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
459 /* set the version (always one) */
460 ret->version = (long)0x1;
462 /* set the fieldID */
463 if (!ec_asn1_group2fieldid(group, ret->fieldID)) {
464 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
469 if (!ec_asn1_group2curve(group, ret->curve)) {
470 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
474 /* set the base point */
475 if ((point = EC_GROUP_get0_generator(group)) == NULL) {
476 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, EC_R_UNDEFINED_GENERATOR);
480 form = EC_GROUP_get_point_conversion_form(group);
482 len = EC_POINT_point2buf(group, point, form, &buffer, NULL);
484 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
487 if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) {
488 OPENSSL_free(buffer);
489 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
492 ASN1_STRING_set0(ret->base, buffer, len);
495 tmp = EC_GROUP_get0_order(group);
497 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
500 ret->order = BN_to_ASN1_INTEGER(tmp, ret->order);
501 if (ret->order == NULL) {
502 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
506 /* set the cofactor (optional) */
507 tmp = EC_GROUP_get0_cofactor(group);
509 ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor);
510 if (ret->cofactor == NULL) {
511 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
520 ECPARAMETERS_free(ret);
524 ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group,
525 ECPKPARAMETERS *params)
528 ECPKPARAMETERS *ret = params;
531 if ((ret = ECPKPARAMETERS_new()) == NULL) {
532 ECerr(EC_F_EC_GROUP_GET_ECPKPARAMETERS, ERR_R_MALLOC_FAILURE);
537 ASN1_OBJECT_free(ret->value.named_curve);
538 else if (ret->type == 1 && ret->value.parameters)
539 ECPARAMETERS_free(ret->value.parameters);
542 if (EC_GROUP_get_asn1_flag(group)) {
544 * use the asn1 OID to describe the elliptic curve parameters
546 tmp = EC_GROUP_get_curve_name(group);
549 if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
552 /* we don't know the nid => ERROR */
555 /* use the ECPARAMETERS structure */
557 if ((ret->value.parameters =
558 EC_GROUP_get_ecparameters(group, NULL)) == NULL)
563 ECPKPARAMETERS_free(ret);
569 EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params)
572 EC_GROUP *ret = NULL;
573 BIGNUM *p = NULL, *a = NULL, *b = NULL;
574 EC_POINT *point = NULL;
577 if (!params->fieldID || !params->fieldID->fieldType ||
578 !params->fieldID->p.ptr) {
579 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
584 * Now extract the curve parameters a and b. Note that, although SEC 1
585 * specifies the length of their encodings, historical versions of OpenSSL
586 * encoded them incorrectly, so we must accept any length for backwards
589 if (!params->curve || !params->curve->a ||
590 !params->curve->a->data || !params->curve->b ||
591 !params->curve->b->data) {
592 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
595 a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL);
597 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB);
600 b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL);
602 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB);
606 /* get the field parameters */
607 tmp = OBJ_obj2nid(params->fieldID->fieldType);
608 if (tmp == NID_X9_62_characteristic_two_field)
609 #ifdef OPENSSL_NO_EC2M
611 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_GF2M_NOT_SUPPORTED);
616 X9_62_CHARACTERISTIC_TWO *char_two;
618 char_two = params->fieldID->p.char_two;
620 field_bits = char_two->m;
621 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
622 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE);
626 if ((p = BN_new()) == NULL) {
627 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
631 /* get the base type */
632 tmp = OBJ_obj2nid(char_two->type);
634 if (tmp == NID_X9_62_tpBasis) {
637 if (!char_two->p.tpBasis) {
638 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
642 tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis);
644 if (!(char_two->m > tmp_long && tmp_long > 0)) {
645 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS,
646 EC_R_INVALID_TRINOMIAL_BASIS);
650 /* create the polynomial */
651 if (!BN_set_bit(p, (int)char_two->m))
653 if (!BN_set_bit(p, (int)tmp_long))
655 if (!BN_set_bit(p, 0))
657 } else if (tmp == NID_X9_62_ppBasis) {
658 X9_62_PENTANOMIAL *penta;
660 penta = char_two->p.ppBasis;
662 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
667 (char_two->m > penta->k3 && penta->k3 > penta->k2
668 && penta->k2 > penta->k1 && penta->k1 > 0)) {
669 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS,
670 EC_R_INVALID_PENTANOMIAL_BASIS);
674 /* create the polynomial */
675 if (!BN_set_bit(p, (int)char_two->m))
677 if (!BN_set_bit(p, (int)penta->k1))
679 if (!BN_set_bit(p, (int)penta->k2))
681 if (!BN_set_bit(p, (int)penta->k3))
683 if (!BN_set_bit(p, 0))
685 } else if (tmp == NID_X9_62_onBasis) {
686 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_NOT_IMPLEMENTED);
690 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
694 /* create the EC_GROUP structure */
695 ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL);
698 else if (tmp == NID_X9_62_prime_field) {
699 /* we have a curve over a prime field */
700 /* extract the prime number */
701 if (!params->fieldID->p.prime) {
702 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
705 p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL);
707 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
711 if (BN_is_negative(p) || BN_is_zero(p)) {
712 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD);
716 field_bits = BN_num_bits(p);
717 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
718 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE);
722 /* create the EC_GROUP structure */
723 ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
725 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD);
730 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
734 /* extract seed (optional) */
735 if (params->curve->seed != NULL) {
736 OPENSSL_free(ret->seed);
737 if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL) {
738 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
741 memcpy(ret->seed, params->curve->seed->data,
742 params->curve->seed->length);
743 ret->seed_len = params->curve->seed->length;
746 if (!params->order || !params->base || !params->base->data) {
747 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
751 if ((point = EC_POINT_new(ret)) == NULL)
754 /* set the point conversion form */
755 EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t)
756 (params->base->data[0] & ~0x01));
758 /* extract the ec point */
759 if (!EC_POINT_oct2point(ret, point, params->base->data,
760 params->base->length, NULL)) {
761 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
765 /* extract the order */
766 if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) {
767 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
770 if (BN_is_negative(a) || BN_is_zero(a)) {
771 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER);
774 if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */
775 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER);
779 /* extract the cofactor (optional) */
780 if (params->cofactor == NULL) {
783 } else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) {
784 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
787 /* set the generator, order and cofactor (if present) */
788 if (!EC_GROUP_set_generator(ret, point, a, b)) {
789 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
797 EC_GROUP_clear_free(ret);
804 EC_POINT_free(point);
808 EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params)
810 EC_GROUP *ret = NULL;
813 if (params == NULL) {
814 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_MISSING_PARAMETERS);
818 if (params->type == 0) { /* the curve is given by an OID */
819 tmp = OBJ_obj2nid(params->value.named_curve);
820 if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) {
821 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS,
822 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
825 EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE);
826 } else if (params->type == 1) { /* the parameters are given by a
827 * ECPARAMETERS structure */
828 ret = EC_GROUP_new_from_ecparameters(params->value.parameters);
830 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, ERR_R_EC_LIB);
833 EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_EXPLICIT_CURVE);
834 } else if (params->type == 2) { /* implicitlyCA */
837 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_ASN1_ERROR);
844 /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
846 EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len)
848 EC_GROUP *group = NULL;
849 ECPKPARAMETERS *params = NULL;
850 const unsigned char *p = *in;
852 if ((params = d2i_ECPKPARAMETERS(NULL, &p, len)) == NULL) {
853 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
854 ECPKPARAMETERS_free(params);
858 if ((group = EC_GROUP_new_from_ecpkparameters(params)) == NULL) {
859 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
860 ECPKPARAMETERS_free(params);
865 EC_GROUP_clear_free(*a);
869 ECPKPARAMETERS_free(params);
874 int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out)
877 ECPKPARAMETERS *tmp = EC_GROUP_get_ecpkparameters(a, NULL);
879 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE);
882 if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) {
883 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE);
884 ECPKPARAMETERS_free(tmp);
887 ECPKPARAMETERS_free(tmp);
891 /* some EC_KEY functions */
893 EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len)
896 EC_PRIVATEKEY *priv_key = NULL;
897 const unsigned char *p = *in;
899 if ((priv_key = d2i_EC_PRIVATEKEY(NULL, &p, len)) == NULL) {
900 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
904 if (a == NULL || *a == NULL) {
905 if ((ret = EC_KEY_new()) == NULL) {
906 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
912 if (priv_key->parameters) {
913 EC_GROUP_clear_free(ret->group);
914 ret->group = EC_GROUP_new_from_ecpkparameters(priv_key->parameters);
917 if (ret->group == NULL) {
918 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
922 ret->version = priv_key->version;
924 if (priv_key->privateKey) {
925 ASN1_OCTET_STRING *pkey = priv_key->privateKey;
926 if (EC_KEY_oct2priv(ret, ASN1_STRING_get0_data(pkey),
927 ASN1_STRING_length(pkey)) == 0)
930 ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY);
934 EC_POINT_clear_free(ret->pub_key);
935 ret->pub_key = EC_POINT_new(ret->group);
936 if (ret->pub_key == NULL) {
937 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
941 if (priv_key->publicKey) {
942 const unsigned char *pub_oct;
945 pub_oct = ASN1_STRING_get0_data(priv_key->publicKey);
946 pub_oct_len = ASN1_STRING_length(priv_key->publicKey);
947 if (!EC_KEY_oct2key(ret, pub_oct, pub_oct_len, NULL)) {
948 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
952 if (ret->group->meth->keygenpub == NULL
953 || ret->group->meth->keygenpub(ret) == 0)
955 /* Remember the original private-key-only encoding. */
956 ret->enc_flag |= EC_PKEY_NO_PUBKEY;
961 EC_PRIVATEKEY_free(priv_key);
966 if (a == NULL || *a != ret)
968 EC_PRIVATEKEY_free(priv_key);
972 int i2d_ECPrivateKey(const EC_KEY *a, unsigned char **out)
975 unsigned char *priv= NULL, *pub= NULL;
976 size_t privlen = 0, publen = 0;
978 EC_PRIVATEKEY *priv_key = NULL;
980 if (a == NULL || a->group == NULL ||
981 (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) {
982 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
986 if ((priv_key = EC_PRIVATEKEY_new()) == NULL) {
987 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
991 priv_key->version = a->version;
993 privlen = EC_KEY_priv2buf(a, &priv);
996 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1000 ASN1_STRING_set0(priv_key->privateKey, priv, privlen);
1003 if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) {
1004 if ((priv_key->parameters =
1005 EC_GROUP_get_ecpkparameters(a->group,
1006 priv_key->parameters)) == NULL) {
1007 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1012 if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) {
1013 priv_key->publicKey = ASN1_BIT_STRING_new();
1014 if (priv_key->publicKey == NULL) {
1015 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1019 publen = EC_KEY_key2buf(a, a->conv_form, &pub, NULL);
1022 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1026 priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
1027 priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
1028 ASN1_STRING_set0(priv_key->publicKey, pub, publen);
1032 if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) {
1033 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1038 OPENSSL_clear_free(priv, privlen);
1040 EC_PRIVATEKEY_free(priv_key);
1041 return (ok ? ret : 0);
1044 int i2d_ECParameters(const EC_KEY *a, unsigned char **out)
1047 ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1050 return i2d_ECPKParameters(a->group, out);
1053 EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len)
1057 if (in == NULL || *in == NULL) {
1058 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1062 if (a == NULL || *a == NULL) {
1063 if ((ret = EC_KEY_new()) == NULL) {
1064 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
1070 if (!d2i_ECPKParameters(&ret->group, in, len)) {
1071 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
1072 if (a == NULL || *a != ret)
1083 EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len)
1087 if (a == NULL || (*a) == NULL || (*a)->group == NULL) {
1089 * sorry, but a EC_GROUP-structure is necessary to set the public key
1091 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1095 if (!EC_KEY_oct2key(ret, *in, len, NULL)) {
1096 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB);
1103 int i2o_ECPublicKey(const EC_KEY *a, unsigned char **out)
1109 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1113 buf_len = EC_POINT_point2oct(a->group, a->pub_key,
1114 a->conv_form, NULL, 0, NULL);
1116 if (out == NULL || buf_len == 0)
1117 /* out == NULL => just return the length of the octet string */
1121 if ((*out = OPENSSL_malloc(buf_len)) == NULL) {
1122 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
1127 if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form,
1128 *out, buf_len, NULL)) {
1129 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB);
1141 DECLARE_ASN1_FUNCTIONS(ECDSA_SIG)
1142 DECLARE_ASN1_ENCODE_FUNCTIONS_name(ECDSA_SIG, ECDSA_SIG)
1144 ECDSA_SIG *ECDSA_SIG_new(void)
1146 ECDSA_SIG *sig = OPENSSL_zalloc(sizeof(*sig));
1148 ECerr(EC_F_ECDSA_SIG_NEW, ERR_R_MALLOC_FAILURE);
1152 void ECDSA_SIG_free(ECDSA_SIG *sig)
1156 BN_clear_free(sig->r);
1157 BN_clear_free(sig->s);
1161 ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **psig, const unsigned char **ppin, long len)
1167 if (psig != NULL && *psig != NULL) {
1170 sig = ECDSA_SIG_new();
1178 if (decode_der_dsa_sig(sig->r, sig->s, ppin, (size_t)len) == 0) {
1179 if (psig == NULL || *psig == NULL)
1180 ECDSA_SIG_free(sig);
1183 if (psig != NULL && *psig == NULL)
1188 int i2d_ECDSA_SIG(const ECDSA_SIG *sig, unsigned char **ppout)
1190 unsigned char *buf = NULL;
1192 unsigned char **pp = NULL;
1196 if (ppout != NULL && *ppout == NULL) {
1197 if ((len = encode_der_dsa_sig(sig->r, sig->s, NULL, SIZE_MAX)) == 0)
1199 buf = OPENSSL_malloc(len);
1208 if ((encoded_len = encode_der_dsa_sig(sig->r, sig->s, pp, len)) == 0) {
1214 return (int)encoded_len;
1217 void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps)
1225 const BIGNUM *ECDSA_SIG_get0_r(const ECDSA_SIG *sig)
1230 const BIGNUM *ECDSA_SIG_get0_s(const ECDSA_SIG *sig)
1235 int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s)
1237 if (r == NULL || s == NULL)
1239 BN_clear_free(sig->r);
1240 BN_clear_free(sig->s);
1246 int ECDSA_size(const EC_KEY *r)
1250 unsigned char buf[4];
1251 const EC_GROUP *group;
1255 group = EC_KEY_get0_group(r);
1259 i = EC_GROUP_order_bits(group);
1262 bs.length = (i + 7) / 8;
1264 bs.type = V_ASN1_INTEGER;
1265 /* If the top bit is set the asn1 encoding is 1 larger. */
1268 i = i2d_ASN1_INTEGER(&bs, NULL);
1269 i += i; /* r and s */
1270 ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);