source: EcnlProtoTool/trunk/openssl-1.1.0e/crypto/ec/ec_asn1.c@ 331

Last change on this file since 331 was 331, checked in by coas-nagasima, 6 years ago

prototoolに関連するプロジェクトをnewlibからmuslを使うよう変更・更新
ntshellをnewlibの下位の実装から、muslのsyscallの実装に変更・更新
以下のOSSをアップデート
・mruby-1.3.0
・musl-1.1.18
・onigmo-6.1.3
・tcc-0.9.27
以下のOSSを追加
・openssl-1.1.0e
・curl-7.57.0
・zlib-1.2.11
以下のmrbgemsを追加
・iij/mruby-digest
・iij/mruby-env
・iij/mruby-errno
・iij/mruby-iijson
・iij/mruby-ipaddr
・iij/mruby-mock
・iij/mruby-require
・iij/mruby-tls-openssl
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc
File size: 35.6 KB
Line 
1/*
2 * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10#include <string.h>
11#include "ec_lcl.h"
12#include <openssl/err.h>
13#include <openssl/asn1t.h>
14#include <openssl/objects.h>
15
16int EC_GROUP_get_basis_type(const EC_GROUP *group)
17{
18 int i = 0;
19
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 */
23 return 0;
24
25 while (group->poly[i] != 0)
26 i++;
27
28 if (i == 4)
29 return NID_X9_62_ppBasis;
30 else if (i == 2)
31 return NID_X9_62_tpBasis;
32 else
33 /* everything else is currently not supported */
34 return 0;
35}
36
37#ifndef OPENSSL_NO_EC2M
38int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k)
39{
40 if (group == NULL)
41 return 0;
42
43 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
44 NID_X9_62_characteristic_two_field
45 || !((group->poly[0] != 0) && (group->poly[1] != 0)
46 && (group->poly[2] == 0))) {
47 ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS,
48 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
49 return 0;
50 }
51
52 if (k)
53 *k = group->poly[1];
54
55 return 1;
56}
57
58int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1,
59 unsigned int *k2, unsigned int *k3)
60{
61 if (group == NULL)
62 return 0;
63
64 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
65 NID_X9_62_characteristic_two_field
66 || !((group->poly[0] != 0) && (group->poly[1] != 0)
67 && (group->poly[2] != 0) && (group->poly[3] != 0)
68 && (group->poly[4] == 0))) {
69 ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS,
70 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
71 return 0;
72 }
73
74 if (k1)
75 *k1 = group->poly[3];
76 if (k2)
77 *k2 = group->poly[2];
78 if (k3)
79 *k3 = group->poly[1];
80
81 return 1;
82}
83#endif
84
85/* some structures needed for the asn1 encoding */
86typedef struct x9_62_pentanomial_st {
87 long k1;
88 long k2;
89 long k3;
90} X9_62_PENTANOMIAL;
91
92typedef struct x9_62_characteristic_two_st {
93 long m;
94 ASN1_OBJECT *type;
95 union {
96 char *ptr;
97 /* NID_X9_62_onBasis */
98 ASN1_NULL *onBasis;
99 /* NID_X9_62_tpBasis */
100 ASN1_INTEGER *tpBasis;
101 /* NID_X9_62_ppBasis */
102 X9_62_PENTANOMIAL *ppBasis;
103 /* anything else */
104 ASN1_TYPE *other;
105 } p;
106} X9_62_CHARACTERISTIC_TWO;
107
108typedef struct x9_62_fieldid_st {
109 ASN1_OBJECT *fieldType;
110 union {
111 char *ptr;
112 /* NID_X9_62_prime_field */
113 ASN1_INTEGER *prime;
114 /* NID_X9_62_characteristic_two_field */
115 X9_62_CHARACTERISTIC_TWO *char_two;
116 /* anything else */
117 ASN1_TYPE *other;
118 } p;
119} X9_62_FIELDID;
120
121typedef struct x9_62_curve_st {
122 ASN1_OCTET_STRING *a;
123 ASN1_OCTET_STRING *b;
124 ASN1_BIT_STRING *seed;
125} X9_62_CURVE;
126
127struct ec_parameters_st {
128 long version;
129 X9_62_FIELDID *fieldID;
130 X9_62_CURVE *curve;
131 ASN1_OCTET_STRING *base;
132 ASN1_INTEGER *order;
133 ASN1_INTEGER *cofactor;
134} /* ECPARAMETERS */ ;
135
136struct ecpk_parameters_st {
137 int type;
138 union {
139 ASN1_OBJECT *named_curve;
140 ECPARAMETERS *parameters;
141 ASN1_NULL *implicitlyCA;
142 } value;
143} /* ECPKPARAMETERS */ ;
144
145/* SEC1 ECPrivateKey */
146typedef struct ec_privatekey_st {
147 long version;
148 ASN1_OCTET_STRING *privateKey;
149 ECPKPARAMETERS *parameters;
150 ASN1_BIT_STRING *publicKey;
151} EC_PRIVATEKEY;
152
153/* the OpenSSL ASN.1 definitions */
154ASN1_SEQUENCE(X9_62_PENTANOMIAL) = {
155 ASN1_SIMPLE(X9_62_PENTANOMIAL, k1, LONG),
156 ASN1_SIMPLE(X9_62_PENTANOMIAL, k2, LONG),
157 ASN1_SIMPLE(X9_62_PENTANOMIAL, k3, LONG)
158} static_ASN1_SEQUENCE_END(X9_62_PENTANOMIAL)
159
160DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
161IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
162
163ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY);
164
165ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = {
166 ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)),
167 ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)),
168 ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL))
169} ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL);
170
171ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = {
172 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, LONG),
173 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT),
174 ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO)
175} static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO)
176
177DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
178IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
179
180ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY);
181
182ASN1_ADB(X9_62_FIELDID) = {
183 ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)),
184 ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO))
185} ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL);
186
187ASN1_SEQUENCE(X9_62_FIELDID) = {
188 ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
189 ASN1_ADB_OBJECT(X9_62_FIELDID)
190} static_ASN1_SEQUENCE_END(X9_62_FIELDID)
191
192ASN1_SEQUENCE(X9_62_CURVE) = {
193 ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING),
194 ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING),
195 ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING)
196} static_ASN1_SEQUENCE_END(X9_62_CURVE)
197
198ASN1_SEQUENCE(ECPARAMETERS) = {
199 ASN1_SIMPLE(ECPARAMETERS, version, LONG),
200 ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID),
201 ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE),
202 ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING),
203 ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER),
204 ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER)
205} ASN1_SEQUENCE_END(ECPARAMETERS)
206
207DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
208IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
209
210ASN1_CHOICE(ECPKPARAMETERS) = {
211 ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT),
212 ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS),
213 ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL)
214} ASN1_CHOICE_END(ECPKPARAMETERS)
215
216DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
217DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS)
218IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
219
220ASN1_SEQUENCE(EC_PRIVATEKEY) = {
221 ASN1_SIMPLE(EC_PRIVATEKEY, version, LONG),
222 ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING),
223 ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0),
224 ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1)
225} static_ASN1_SEQUENCE_END(EC_PRIVATEKEY)
226
227DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
228DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY)
229IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
230
231/* some declarations of internal function */
232
233/* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */
234static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *);
235/* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */
236static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *);
237
238/* the function definitions */
239
240static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field)
241{
242 int ok = 0, nid;
243 BIGNUM *tmp = NULL;
244
245 if (group == NULL || field == NULL)
246 return 0;
247
248 /* clear the old values (if necessary) */
249 ASN1_OBJECT_free(field->fieldType);
250 ASN1_TYPE_free(field->p.other);
251
252 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
253 /* set OID for the field */
254 if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) {
255 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
256 goto err;
257 }
258
259 if (nid == NID_X9_62_prime_field) {
260 if ((tmp = BN_new()) == NULL) {
261 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
262 goto err;
263 }
264 /* the parameters are specified by the prime number p */
265 if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL)) {
266 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
267 goto err;
268 }
269 /* set the prime number */
270 field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL);
271 if (field->p.prime == NULL) {
272 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
273 goto err;
274 }
275 } else if (nid == NID_X9_62_characteristic_two_field)
276#ifdef OPENSSL_NO_EC2M
277 {
278 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED);
279 goto err;
280 }
281#else
282 {
283 int field_type;
284 X9_62_CHARACTERISTIC_TWO *char_two;
285
286 field->p.char_two = X9_62_CHARACTERISTIC_TWO_new();
287 char_two = field->p.char_two;
288
289 if (char_two == NULL) {
290 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
291 goto err;
292 }
293
294 char_two->m = (long)EC_GROUP_get_degree(group);
295
296 field_type = EC_GROUP_get_basis_type(group);
297
298 if (field_type == 0) {
299 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
300 goto err;
301 }
302 /* set base type OID */
303 if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) {
304 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
305 goto err;
306 }
307
308 if (field_type == NID_X9_62_tpBasis) {
309 unsigned int k;
310
311 if (!EC_GROUP_get_trinomial_basis(group, &k))
312 goto err;
313
314 char_two->p.tpBasis = ASN1_INTEGER_new();
315 if (char_two->p.tpBasis == NULL) {
316 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
317 goto err;
318 }
319 if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) {
320 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
321 goto err;
322 }
323 } else if (field_type == NID_X9_62_ppBasis) {
324 unsigned int k1, k2, k3;
325
326 if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3))
327 goto err;
328
329 char_two->p.ppBasis = X9_62_PENTANOMIAL_new();
330 if (char_two->p.ppBasis == NULL) {
331 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
332 goto err;
333 }
334
335 /* set k? values */
336 char_two->p.ppBasis->k1 = (long)k1;
337 char_two->p.ppBasis->k2 = (long)k2;
338 char_two->p.ppBasis->k3 = (long)k3;
339 } else { /* field_type == NID_X9_62_onBasis */
340
341 /* for ONB the parameters are (asn1) NULL */
342 char_two->p.onBasis = ASN1_NULL_new();
343 if (char_two->p.onBasis == NULL) {
344 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
345 goto err;
346 }
347 }
348 }
349#endif
350 else {
351 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_UNSUPPORTED_FIELD);
352 goto err;
353 }
354
355 ok = 1;
356
357 err:
358 BN_free(tmp);
359 return (ok);
360}
361
362static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve)
363{
364 int ok = 0, nid;
365 BIGNUM *tmp_1 = NULL, *tmp_2 = NULL;
366 unsigned char *buffer_1 = NULL, *buffer_2 = NULL,
367 *a_buf = NULL, *b_buf = NULL;
368 size_t len_1, len_2;
369 unsigned char char_zero = 0;
370
371 if (!group || !curve || !curve->a || !curve->b)
372 return 0;
373
374 if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) {
375 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
376 goto err;
377 }
378
379 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
380
381 /* get a and b */
382 if (nid == NID_X9_62_prime_field) {
383 if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL)) {
384 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
385 goto err;
386 }
387 }
388#ifndef OPENSSL_NO_EC2M
389 else { /* nid == NID_X9_62_characteristic_two_field */
390
391 if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL)) {
392 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
393 goto err;
394 }
395 }
396#endif
397 len_1 = (size_t)BN_num_bytes(tmp_1);
398 len_2 = (size_t)BN_num_bytes(tmp_2);
399
400 if (len_1 == 0) {
401 /* len_1 == 0 => a == 0 */
402 a_buf = &char_zero;
403 len_1 = 1;
404 } else {
405 if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL) {
406 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
407 goto err;
408 }
409 if ((len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0) {
410 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
411 goto err;
412 }
413 a_buf = buffer_1;
414 }
415
416 if (len_2 == 0) {
417 /* len_2 == 0 => b == 0 */
418 b_buf = &char_zero;
419 len_2 = 1;
420 } else {
421 if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL) {
422 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
423 goto err;
424 }
425 if ((len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0) {
426 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
427 goto err;
428 }
429 b_buf = buffer_2;
430 }
431
432 /* set a and b */
433 if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) ||
434 !ASN1_OCTET_STRING_set(curve->b, b_buf, len_2)) {
435 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
436 goto err;
437 }
438
439 /* set the seed (optional) */
440 if (group->seed) {
441 if (!curve->seed)
442 if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) {
443 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
444 goto err;
445 }
446 curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
447 curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT;
448 if (!ASN1_BIT_STRING_set(curve->seed, group->seed,
449 (int)group->seed_len)) {
450 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
451 goto err;
452 }
453 } else {
454 ASN1_BIT_STRING_free(curve->seed);
455 curve->seed = NULL;
456 }
457
458 ok = 1;
459
460 err:
461 OPENSSL_free(buffer_1);
462 OPENSSL_free(buffer_2);
463 BN_free(tmp_1);
464 BN_free(tmp_2);
465 return (ok);
466}
467
468ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group,
469 ECPARAMETERS *params)
470{
471 size_t len = 0;
472 ECPARAMETERS *ret = NULL;
473 const BIGNUM *tmp;
474 unsigned char *buffer = NULL;
475 const EC_POINT *point = NULL;
476 point_conversion_form_t form;
477
478 if (params == NULL) {
479 if ((ret = ECPARAMETERS_new()) == NULL) {
480 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
481 goto err;
482 }
483 } else
484 ret = params;
485
486 /* set the version (always one) */
487 ret->version = (long)0x1;
488
489 /* set the fieldID */
490 if (!ec_asn1_group2fieldid(group, ret->fieldID)) {
491 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
492 goto err;
493 }
494
495 /* set the curve */
496 if (!ec_asn1_group2curve(group, ret->curve)) {
497 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
498 goto err;
499 }
500
501 /* set the base point */
502 if ((point = EC_GROUP_get0_generator(group)) == NULL) {
503 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, EC_R_UNDEFINED_GENERATOR);
504 goto err;
505 }
506
507 form = EC_GROUP_get_point_conversion_form(group);
508
509 len = EC_POINT_point2buf(group, point, form, &buffer, NULL);
510 if (len == 0) {
511 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
512 goto err;
513 }
514 if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) {
515 OPENSSL_free(buffer);
516 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
517 goto err;
518 }
519 ASN1_STRING_set0(ret->base, buffer, len);
520
521 /* set the order */
522 tmp = EC_GROUP_get0_order(group);
523 if (tmp == NULL) {
524 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
525 goto err;
526 }
527 ret->order = BN_to_ASN1_INTEGER(tmp, ret->order);
528 if (ret->order == NULL) {
529 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
530 goto err;
531 }
532
533 /* set the cofactor (optional) */
534 tmp = EC_GROUP_get0_cofactor(group);
535 if (tmp != NULL) {
536 ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor);
537 if (ret->cofactor == NULL) {
538 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
539 goto err;
540 }
541 }
542
543 return ret;
544
545 err:
546 if (params == NULL)
547 ECPARAMETERS_free(ret);
548 return NULL;
549}
550
551ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group,
552 ECPKPARAMETERS *params)
553{
554 int ok = 1, tmp;
555 ECPKPARAMETERS *ret = params;
556
557 if (ret == NULL) {
558 if ((ret = ECPKPARAMETERS_new()) == NULL) {
559 ECerr(EC_F_EC_GROUP_GET_ECPKPARAMETERS, ERR_R_MALLOC_FAILURE);
560 return NULL;
561 }
562 } else {
563 if (ret->type == 0)
564 ASN1_OBJECT_free(ret->value.named_curve);
565 else if (ret->type == 1 && ret->value.parameters)
566 ECPARAMETERS_free(ret->value.parameters);
567 }
568
569 if (EC_GROUP_get_asn1_flag(group)) {
570 /*
571 * use the asn1 OID to describe the the elliptic curve parameters
572 */
573 tmp = EC_GROUP_get_curve_name(group);
574 if (tmp) {
575 ret->type = 0;
576 if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
577 ok = 0;
578 } else
579 /* we don't know the nid => ERROR */
580 ok = 0;
581 } else {
582 /* use the ECPARAMETERS structure */
583 ret->type = 1;
584 if ((ret->value.parameters =
585 EC_GROUP_get_ecparameters(group, NULL)) == NULL)
586 ok = 0;
587 }
588
589 if (!ok) {
590 ECPKPARAMETERS_free(ret);
591 return NULL;
592 }
593 return ret;
594}
595
596EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params)
597{
598 int ok = 0, tmp;
599 EC_GROUP *ret = NULL;
600 BIGNUM *p = NULL, *a = NULL, *b = NULL;
601 EC_POINT *point = NULL;
602 long field_bits;
603
604 if (!params->fieldID || !params->fieldID->fieldType ||
605 !params->fieldID->p.ptr) {
606 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
607 goto err;
608 }
609
610 /* now extract the curve parameters a and b */
611 if (!params->curve || !params->curve->a ||
612 !params->curve->a->data || !params->curve->b ||
613 !params->curve->b->data) {
614 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
615 goto err;
616 }
617 a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL);
618 if (a == NULL) {
619 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB);
620 goto err;
621 }
622 b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL);
623 if (b == NULL) {
624 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB);
625 goto err;
626 }
627
628 /* get the field parameters */
629 tmp = OBJ_obj2nid(params->fieldID->fieldType);
630 if (tmp == NID_X9_62_characteristic_two_field)
631#ifdef OPENSSL_NO_EC2M
632 {
633 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_GF2M_NOT_SUPPORTED);
634 goto err;
635 }
636#else
637 {
638 X9_62_CHARACTERISTIC_TWO *char_two;
639
640 char_two = params->fieldID->p.char_two;
641
642 field_bits = char_two->m;
643 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
644 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE);
645 goto err;
646 }
647
648 if ((p = BN_new()) == NULL) {
649 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
650 goto err;
651 }
652
653 /* get the base type */
654 tmp = OBJ_obj2nid(char_two->type);
655
656 if (tmp == NID_X9_62_tpBasis) {
657 long tmp_long;
658
659 if (!char_two->p.tpBasis) {
660 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
661 goto err;
662 }
663
664 tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis);
665
666 if (!(char_two->m > tmp_long && tmp_long > 0)) {
667 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS,
668 EC_R_INVALID_TRINOMIAL_BASIS);
669 goto err;
670 }
671
672 /* create the polynomial */
673 if (!BN_set_bit(p, (int)char_two->m))
674 goto err;
675 if (!BN_set_bit(p, (int)tmp_long))
676 goto err;
677 if (!BN_set_bit(p, 0))
678 goto err;
679 } else if (tmp == NID_X9_62_ppBasis) {
680 X9_62_PENTANOMIAL *penta;
681
682 penta = char_two->p.ppBasis;
683 if (!penta) {
684 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
685 goto err;
686 }
687
688 if (!
689 (char_two->m > penta->k3 && penta->k3 > penta->k2
690 && penta->k2 > penta->k1 && penta->k1 > 0)) {
691 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS,
692 EC_R_INVALID_PENTANOMIAL_BASIS);
693 goto err;
694 }
695
696 /* create the polynomial */
697 if (!BN_set_bit(p, (int)char_two->m))
698 goto err;
699 if (!BN_set_bit(p, (int)penta->k1))
700 goto err;
701 if (!BN_set_bit(p, (int)penta->k2))
702 goto err;
703 if (!BN_set_bit(p, (int)penta->k3))
704 goto err;
705 if (!BN_set_bit(p, 0))
706 goto err;
707 } else if (tmp == NID_X9_62_onBasis) {
708 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_NOT_IMPLEMENTED);
709 goto err;
710 } else { /* error */
711
712 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
713 goto err;
714 }
715
716 /* create the EC_GROUP structure */
717 ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL);
718 }
719#endif
720 else if (tmp == NID_X9_62_prime_field) {
721 /* we have a curve over a prime field */
722 /* extract the prime number */
723 if (!params->fieldID->p.prime) {
724 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
725 goto err;
726 }
727 p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL);
728 if (p == NULL) {
729 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
730 goto err;
731 }
732
733 if (BN_is_negative(p) || BN_is_zero(p)) {
734 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD);
735 goto err;
736 }
737
738 field_bits = BN_num_bits(p);
739 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
740 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE);
741 goto err;
742 }
743
744 /* create the EC_GROUP structure */
745 ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
746 } else {
747 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD);
748 goto err;
749 }
750
751 if (ret == NULL) {
752 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
753 goto err;
754 }
755
756 /* extract seed (optional) */
757 if (params->curve->seed != NULL) {
758 OPENSSL_free(ret->seed);
759 if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL) {
760 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
761 goto err;
762 }
763 memcpy(ret->seed, params->curve->seed->data,
764 params->curve->seed->length);
765 ret->seed_len = params->curve->seed->length;
766 }
767
768 if (!params->order || !params->base || !params->base->data) {
769 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
770 goto err;
771 }
772
773 if ((point = EC_POINT_new(ret)) == NULL)
774 goto err;
775
776 /* set the point conversion form */
777 EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t)
778 (params->base->data[0] & ~0x01));
779
780 /* extract the ec point */
781 if (!EC_POINT_oct2point(ret, point, params->base->data,
782 params->base->length, NULL)) {
783 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
784 goto err;
785 }
786
787 /* extract the order */
788 if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) {
789 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
790 goto err;
791 }
792 if (BN_is_negative(a) || BN_is_zero(a)) {
793 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER);
794 goto err;
795 }
796 if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */
797 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER);
798 goto err;
799 }
800
801 /* extract the cofactor (optional) */
802 if (params->cofactor == NULL) {
803 BN_free(b);
804 b = NULL;
805 } else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) {
806 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
807 goto err;
808 }
809 /* set the generator, order and cofactor (if present) */
810 if (!EC_GROUP_set_generator(ret, point, a, b)) {
811 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
812 goto err;
813 }
814
815 ok = 1;
816
817 err:
818 if (!ok) {
819 EC_GROUP_clear_free(ret);
820 ret = NULL;
821 }
822
823 BN_free(p);
824 BN_free(a);
825 BN_free(b);
826 EC_POINT_free(point);
827 return (ret);
828}
829
830EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params)
831{
832 EC_GROUP *ret = NULL;
833 int tmp = 0;
834
835 if (params == NULL) {
836 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_MISSING_PARAMETERS);
837 return NULL;
838 }
839
840 if (params->type == 0) { /* the curve is given by an OID */
841 tmp = OBJ_obj2nid(params->value.named_curve);
842 if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) {
843 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS,
844 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
845 return NULL;
846 }
847 EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE);
848 } else if (params->type == 1) { /* the parameters are given by a
849 * ECPARAMETERS structure */
850 ret = EC_GROUP_new_from_ecparameters(params->value.parameters);
851 if (!ret) {
852 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, ERR_R_EC_LIB);
853 return NULL;
854 }
855 EC_GROUP_set_asn1_flag(ret, 0x0);
856 } else if (params->type == 2) { /* implicitlyCA */
857 return NULL;
858 } else {
859 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_ASN1_ERROR);
860 return NULL;
861 }
862
863 return ret;
864}
865
866/* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
867
868EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len)
869{
870 EC_GROUP *group = NULL;
871 ECPKPARAMETERS *params = NULL;
872 const unsigned char *p = *in;
873
874 if ((params = d2i_ECPKPARAMETERS(NULL, &p, len)) == NULL) {
875 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
876 ECPKPARAMETERS_free(params);
877 return NULL;
878 }
879
880 if ((group = EC_GROUP_new_from_ecpkparameters(params)) == NULL) {
881 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
882 ECPKPARAMETERS_free(params);
883 return NULL;
884 }
885
886 if (a) {
887 EC_GROUP_clear_free(*a);
888 *a = group;
889 }
890
891 ECPKPARAMETERS_free(params);
892 *in = p;
893 return (group);
894}
895
896int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out)
897{
898 int ret = 0;
899 ECPKPARAMETERS *tmp = EC_GROUP_get_ecpkparameters(a, NULL);
900 if (tmp == NULL) {
901 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE);
902 return 0;
903 }
904 if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) {
905 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE);
906 ECPKPARAMETERS_free(tmp);
907 return 0;
908 }
909 ECPKPARAMETERS_free(tmp);
910 return (ret);
911}
912
913/* some EC_KEY functions */
914
915EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len)
916{
917 EC_KEY *ret = NULL;
918 EC_PRIVATEKEY *priv_key = NULL;
919 const unsigned char *p = *in;
920
921 if ((priv_key = d2i_EC_PRIVATEKEY(NULL, &p, len)) == NULL) {
922 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
923 return NULL;
924 }
925
926 if (a == NULL || *a == NULL) {
927 if ((ret = EC_KEY_new()) == NULL) {
928 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
929 goto err;
930 }
931 } else
932 ret = *a;
933
934 if (priv_key->parameters) {
935 EC_GROUP_clear_free(ret->group);
936 ret->group = EC_GROUP_new_from_ecpkparameters(priv_key->parameters);
937 }
938
939 if (ret->group == NULL) {
940 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
941 goto err;
942 }
943
944 ret->version = priv_key->version;
945
946 if (priv_key->privateKey) {
947 ASN1_OCTET_STRING *pkey = priv_key->privateKey;
948 if (EC_KEY_oct2priv(ret, ASN1_STRING_get0_data(pkey),
949 ASN1_STRING_length(pkey)) == 0)
950 goto err;
951 } else {
952 ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY);
953 goto err;
954 }
955
956 EC_POINT_clear_free(ret->pub_key);
957 ret->pub_key = EC_POINT_new(ret->group);
958 if (ret->pub_key == NULL) {
959 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
960 goto err;
961 }
962
963 if (priv_key->publicKey) {
964 const unsigned char *pub_oct;
965 int pub_oct_len;
966
967 pub_oct = ASN1_STRING_get0_data(priv_key->publicKey);
968 pub_oct_len = ASN1_STRING_length(priv_key->publicKey);
969 if (!EC_KEY_oct2key(ret, pub_oct, pub_oct_len, NULL)) {
970 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
971 goto err;
972 }
973 } else {
974 if (ret->group->meth->keygenpub == NULL
975 || ret->group->meth->keygenpub(ret) == 0)
976 goto err;
977 /* Remember the original private-key-only encoding. */
978 ret->enc_flag |= EC_PKEY_NO_PUBKEY;
979 }
980
981 if (a)
982 *a = ret;
983 EC_PRIVATEKEY_free(priv_key);
984 *in = p;
985 return (ret);
986
987 err:
988 if (a == NULL || *a != ret)
989 EC_KEY_free(ret);
990 EC_PRIVATEKEY_free(priv_key);
991 return NULL;
992}
993
994int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out)
995{
996 int ret = 0, ok = 0;
997 unsigned char *priv= NULL, *pub= NULL;
998 size_t privlen = 0, publen = 0;
999
1000 EC_PRIVATEKEY *priv_key = NULL;
1001
1002 if (a == NULL || a->group == NULL ||
1003 (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) {
1004 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
1005 goto err;
1006 }
1007
1008 if ((priv_key = EC_PRIVATEKEY_new()) == NULL) {
1009 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1010 goto err;
1011 }
1012
1013 priv_key->version = a->version;
1014
1015 privlen = EC_KEY_priv2buf(a, &priv);
1016
1017 if (privlen == 0) {
1018 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1019 goto err;
1020 }
1021
1022 ASN1_STRING_set0(priv_key->privateKey, priv, privlen);
1023 priv = NULL;
1024
1025 if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) {
1026 if ((priv_key->parameters =
1027 EC_GROUP_get_ecpkparameters(a->group,
1028 priv_key->parameters)) == NULL) {
1029 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1030 goto err;
1031 }
1032 }
1033
1034 if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) {
1035 priv_key->publicKey = ASN1_BIT_STRING_new();
1036 if (priv_key->publicKey == NULL) {
1037 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1038 goto err;
1039 }
1040
1041 publen = EC_KEY_key2buf(a, a->conv_form, &pub, NULL);
1042
1043 if (publen == 0) {
1044 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1045 goto err;
1046 }
1047
1048 priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
1049 priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
1050 ASN1_STRING_set0(priv_key->publicKey, pub, publen);
1051 pub = NULL;
1052 }
1053
1054 if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) {
1055 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1056 goto err;
1057 }
1058 ok = 1;
1059 err:
1060 OPENSSL_clear_free(priv, privlen);
1061 OPENSSL_free(pub);
1062 EC_PRIVATEKEY_free(priv_key);
1063 return (ok ? ret : 0);
1064}
1065
1066int i2d_ECParameters(EC_KEY *a, unsigned char **out)
1067{
1068 if (a == NULL) {
1069 ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1070 return 0;
1071 }
1072 return i2d_ECPKParameters(a->group, out);
1073}
1074
1075EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len)
1076{
1077 EC_KEY *ret;
1078
1079 if (in == NULL || *in == NULL) {
1080 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1081 return NULL;
1082 }
1083
1084 if (a == NULL || *a == NULL) {
1085 if ((ret = EC_KEY_new()) == NULL) {
1086 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
1087 return NULL;
1088 }
1089 } else
1090 ret = *a;
1091
1092 if (!d2i_ECPKParameters(&ret->group, in, len)) {
1093 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
1094 if (a == NULL || *a != ret)
1095 EC_KEY_free(ret);
1096 return NULL;
1097 }
1098
1099 if (a)
1100 *a = ret;
1101
1102 return ret;
1103}
1104
1105EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len)
1106{
1107 EC_KEY *ret = NULL;
1108
1109 if (a == NULL || (*a) == NULL || (*a)->group == NULL) {
1110 /*
1111 * sorry, but a EC_GROUP-structure is necessary to set the public key
1112 */
1113 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1114 return 0;
1115 }
1116 ret = *a;
1117 if (!EC_KEY_oct2key(ret, *in, len, NULL)) {
1118 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB);
1119 return 0;
1120 }
1121 *in += len;
1122 return ret;
1123}
1124
1125int i2o_ECPublicKey(const EC_KEY *a, unsigned char **out)
1126{
1127 size_t buf_len = 0;
1128 int new_buffer = 0;
1129
1130 if (a == NULL) {
1131 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1132 return 0;
1133 }
1134
1135 buf_len = EC_POINT_point2oct(a->group, a->pub_key,
1136 a->conv_form, NULL, 0, NULL);
1137
1138 if (out == NULL || buf_len == 0)
1139 /* out == NULL => just return the length of the octet string */
1140 return buf_len;
1141
1142 if (*out == NULL) {
1143 if ((*out = OPENSSL_malloc(buf_len)) == NULL) {
1144 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
1145 return 0;
1146 }
1147 new_buffer = 1;
1148 }
1149 if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form,
1150 *out, buf_len, NULL)) {
1151 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB);
1152 if (new_buffer) {
1153 OPENSSL_free(*out);
1154 *out = NULL;
1155 }
1156 return 0;
1157 }
1158 if (!new_buffer)
1159 *out += buf_len;
1160 return buf_len;
1161}
1162
1163ASN1_SEQUENCE(ECDSA_SIG) = {
1164 ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM),
1165 ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM)
1166} static_ASN1_SEQUENCE_END(ECDSA_SIG)
1167
1168DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG)
1169DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG)
1170IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSA_SIG, ECDSA_SIG, ECDSA_SIG)
1171
1172ECDSA_SIG *ECDSA_SIG_new(void)
1173{
1174 ECDSA_SIG *sig = OPENSSL_zalloc(sizeof(*sig));
1175 if (sig == NULL)
1176 ECerr(EC_F_ECDSA_SIG_NEW, ERR_R_MALLOC_FAILURE);
1177 return sig;
1178}
1179
1180void ECDSA_SIG_free(ECDSA_SIG *sig)
1181{
1182 if (sig == NULL)
1183 return;
1184 BN_clear_free(sig->r);
1185 BN_clear_free(sig->s);
1186 OPENSSL_free(sig);
1187}
1188
1189void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps)
1190{
1191 if (pr != NULL)
1192 *pr = sig->r;
1193 if (ps != NULL)
1194 *ps = sig->s;
1195}
1196
1197int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s)
1198{
1199 if (r == NULL || s == NULL)
1200 return 0;
1201 BN_clear_free(sig->r);
1202 BN_clear_free(sig->s);
1203 sig->r = r;
1204 sig->s = s;
1205 return 1;
1206}
1207
1208int ECDSA_size(const EC_KEY *r)
1209{
1210 int ret, i;
1211 ASN1_INTEGER bs;
1212 unsigned char buf[4];
1213 const EC_GROUP *group;
1214
1215 if (r == NULL)
1216 return 0;
1217 group = EC_KEY_get0_group(r);
1218 if (group == NULL)
1219 return 0;
1220
1221 i = EC_GROUP_order_bits(group);
1222 if (i == 0)
1223 return 0;
1224 bs.length = (i + 7) / 8;
1225 bs.data = buf;
1226 bs.type = V_ASN1_INTEGER;
1227 /* If the top bit is set the asn1 encoding is 1 larger. */
1228 buf[0] = 0xff;
1229
1230 i = i2d_ASN1_INTEGER(&bs, NULL);
1231 i += i; /* r and s */
1232 ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
1233 return (ret);
1234}
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