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[thirdparty/openssl.git] / crypto / ec / ec_asn1.c
1 /* crypto/ec/ec_asn1.c */
2 /*
3 * Written by Nils Larsch for the OpenSSL project.
4 */
5 /* ====================================================================
6 * Copyright (c) 2000-2003 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59 #include <string.h>
60 #include "ec_lcl.h"
61 #include <openssl/err.h>
62 #include <openssl/asn1t.h>
63 #include <openssl/objects.h>
64
65 int EC_GROUP_get_basis_type(const EC_GROUP *group)
66 {
67 int i = 0;
68
69 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
70 NID_X9_62_characteristic_two_field)
71 /* everything else is currently not supported */
72 return 0;
73
74 while (group->poly[i] != 0)
75 i++;
76
77 if (i == 4)
78 return NID_X9_62_ppBasis;
79 else if (i == 2)
80 return NID_X9_62_tpBasis;
81 else
82 /* everything else is currently not supported */
83 return 0;
84 }
85
86 #ifndef OPENSSL_NO_EC2M
87 int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k)
88 {
89 if (group == NULL)
90 return 0;
91
92 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
93 NID_X9_62_characteristic_two_field
94 || !((group->poly[0] != 0) && (group->poly[1] != 0)
95 && (group->poly[2] == 0))) {
96 ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS,
97 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
98 return 0;
99 }
100
101 if (k)
102 *k = group->poly[1];
103
104 return 1;
105 }
106
107 int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1,
108 unsigned int *k2, unsigned int *k3)
109 {
110 if (group == NULL)
111 return 0;
112
113 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
114 NID_X9_62_characteristic_two_field
115 || !((group->poly[0] != 0) && (group->poly[1] != 0)
116 && (group->poly[2] != 0) && (group->poly[3] != 0)
117 && (group->poly[4] == 0))) {
118 ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS,
119 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
120 return 0;
121 }
122
123 if (k1)
124 *k1 = group->poly[3];
125 if (k2)
126 *k2 = group->poly[2];
127 if (k3)
128 *k3 = group->poly[1];
129
130 return 1;
131 }
132 #endif
133
134 /* some structures needed for the asn1 encoding */
135 typedef struct x9_62_pentanomial_st {
136 long k1;
137 long k2;
138 long k3;
139 } X9_62_PENTANOMIAL;
140
141 typedef struct x9_62_characteristic_two_st {
142 long m;
143 ASN1_OBJECT *type;
144 union {
145 char *ptr;
146 /* NID_X9_62_onBasis */
147 ASN1_NULL *onBasis;
148 /* NID_X9_62_tpBasis */
149 ASN1_INTEGER *tpBasis;
150 /* NID_X9_62_ppBasis */
151 X9_62_PENTANOMIAL *ppBasis;
152 /* anything else */
153 ASN1_TYPE *other;
154 } p;
155 } X9_62_CHARACTERISTIC_TWO;
156
157 typedef struct x9_62_fieldid_st {
158 ASN1_OBJECT *fieldType;
159 union {
160 char *ptr;
161 /* NID_X9_62_prime_field */
162 ASN1_INTEGER *prime;
163 /* NID_X9_62_characteristic_two_field */
164 X9_62_CHARACTERISTIC_TWO *char_two;
165 /* anything else */
166 ASN1_TYPE *other;
167 } p;
168 } X9_62_FIELDID;
169
170 typedef struct x9_62_curve_st {
171 ASN1_OCTET_STRING *a;
172 ASN1_OCTET_STRING *b;
173 ASN1_BIT_STRING *seed;
174 } X9_62_CURVE;
175
176 typedef struct ec_parameters_st {
177 long version;
178 X9_62_FIELDID *fieldID;
179 X9_62_CURVE *curve;
180 ASN1_OCTET_STRING *base;
181 ASN1_INTEGER *order;
182 ASN1_INTEGER *cofactor;
183 } ECPARAMETERS;
184
185 struct ecpk_parameters_st {
186 int type;
187 union {
188 ASN1_OBJECT *named_curve;
189 ECPARAMETERS *parameters;
190 ASN1_NULL *implicitlyCA;
191 } value;
192 } /* ECPKPARAMETERS */ ;
193
194 /* SEC1 ECPrivateKey */
195 typedef struct ec_privatekey_st {
196 long version;
197 ASN1_OCTET_STRING *privateKey;
198 ECPKPARAMETERS *parameters;
199 ASN1_BIT_STRING *publicKey;
200 } EC_PRIVATEKEY;
201
202 /* the OpenSSL ASN.1 definitions */
203 ASN1_SEQUENCE(X9_62_PENTANOMIAL) = {
204 ASN1_SIMPLE(X9_62_PENTANOMIAL, k1, LONG),
205 ASN1_SIMPLE(X9_62_PENTANOMIAL, k2, LONG),
206 ASN1_SIMPLE(X9_62_PENTANOMIAL, k3, LONG)
207 } ASN1_SEQUENCE_END(X9_62_PENTANOMIAL)
208
209 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
210 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
211
212 ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY);
213
214 ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = {
215 ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)),
216 ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)),
217 ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL))
218 } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL);
219
220 ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = {
221 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, LONG),
222 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT),
223 ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO)
224 } ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO)
225
226 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
227 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
228
229 ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY);
230
231 ASN1_ADB(X9_62_FIELDID) = {
232 ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)),
233 ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO))
234 } ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL);
235
236 ASN1_SEQUENCE(X9_62_FIELDID) = {
237 ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
238 ASN1_ADB_OBJECT(X9_62_FIELDID)
239 } ASN1_SEQUENCE_END(X9_62_FIELDID)
240
241 ASN1_SEQUENCE(X9_62_CURVE) = {
242 ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING),
243 ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING),
244 ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING)
245 } ASN1_SEQUENCE_END(X9_62_CURVE)
246
247 ASN1_SEQUENCE(ECPARAMETERS) = {
248 ASN1_SIMPLE(ECPARAMETERS, version, LONG),
249 ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID),
250 ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE),
251 ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING),
252 ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER),
253 ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER)
254 } ASN1_SEQUENCE_END(ECPARAMETERS)
255
256 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
257 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
258
259 ASN1_CHOICE(ECPKPARAMETERS) = {
260 ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT),
261 ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS),
262 ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL)
263 } ASN1_CHOICE_END(ECPKPARAMETERS)
264
265 DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
266 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS)
267 IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
268
269 ASN1_SEQUENCE(EC_PRIVATEKEY) = {
270 ASN1_SIMPLE(EC_PRIVATEKEY, version, LONG),
271 ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING),
272 ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0),
273 ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1)
274 } ASN1_SEQUENCE_END(EC_PRIVATEKEY)
275
276 DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
277 DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY)
278 IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
279
280 /* some declarations of internal function */
281
282 /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */
283 static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *);
284 /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */
285 static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *);
286 /*
287 * ec_asn1_parameters2group() creates a EC_GROUP object from a ECPARAMETERS
288 * object
289 */
290 static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *);
291 /*
292 * ec_asn1_group2parameters() creates a ECPARAMETERS object from a EC_GROUP
293 * object
294 */
295 static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *,
296 ECPARAMETERS *);
297 /*
298 * ec_asn1_pkparameters2group() creates a EC_GROUP object from a
299 * ECPKPARAMETERS object
300 */
301 static EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *);
302 /*
303 * ec_asn1_group2pkparameters() creates a ECPKPARAMETERS object from a
304 * EC_GROUP object
305 */
306 static ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *,
307 ECPKPARAMETERS *);
308
309 /* the function definitions */
310
311 static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field)
312 {
313 int ok = 0, nid;
314 BIGNUM *tmp = NULL;
315
316 if (group == NULL || field == NULL)
317 return 0;
318
319 /* clear the old values (if necessary) */
320 if (field->fieldType != NULL)
321 ASN1_OBJECT_free(field->fieldType);
322 if (field->p.other != NULL)
323 ASN1_TYPE_free(field->p.other);
324
325 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
326 /* set OID for the field */
327 if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) {
328 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
329 goto err;
330 }
331
332 if (nid == NID_X9_62_prime_field) {
333 if ((tmp = BN_new()) == NULL) {
334 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
335 goto err;
336 }
337 /* the parameters are specified by the prime number p */
338 if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL)) {
339 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
340 goto err;
341 }
342 /* set the prime number */
343 field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL);
344 if (field->p.prime == NULL) {
345 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
346 goto err;
347 }
348 } else /* nid == NID_X9_62_characteristic_two_field */
349 #ifdef OPENSSL_NO_EC2M
350 {
351 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED);
352 goto err;
353 }
354 #else
355 {
356 int field_type;
357 X9_62_CHARACTERISTIC_TWO *char_two;
358
359 field->p.char_two = X9_62_CHARACTERISTIC_TWO_new();
360 char_two = field->p.char_two;
361
362 if (char_two == NULL) {
363 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
364 goto err;
365 }
366
367 char_two->m = (long)EC_GROUP_get_degree(group);
368
369 field_type = EC_GROUP_get_basis_type(group);
370
371 if (field_type == 0) {
372 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
373 goto err;
374 }
375 /* set base type OID */
376 if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) {
377 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
378 goto err;
379 }
380
381 if (field_type == NID_X9_62_tpBasis) {
382 unsigned int k;
383
384 if (!EC_GROUP_get_trinomial_basis(group, &k))
385 goto err;
386
387 char_two->p.tpBasis = ASN1_INTEGER_new();
388 if (!char_two->p.tpBasis) {
389 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
390 goto err;
391 }
392 if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) {
393 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
394 goto err;
395 }
396 } else if (field_type == NID_X9_62_ppBasis) {
397 unsigned int k1, k2, k3;
398
399 if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3))
400 goto err;
401
402 char_two->p.ppBasis = X9_62_PENTANOMIAL_new();
403 if (!char_two->p.ppBasis) {
404 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
405 goto err;
406 }
407
408 /* set k? values */
409 char_two->p.ppBasis->k1 = (long)k1;
410 char_two->p.ppBasis->k2 = (long)k2;
411 char_two->p.ppBasis->k3 = (long)k3;
412 } else { /* field_type == NID_X9_62_onBasis */
413
414 /* for ONB the parameters are (asn1) NULL */
415 char_two->p.onBasis = ASN1_NULL_new();
416 if (!char_two->p.onBasis) {
417 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
418 goto err;
419 }
420 }
421 }
422 #endif
423
424 ok = 1;
425
426 err:if (tmp)
427 BN_free(tmp);
428 return (ok);
429 }
430
431 static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve)
432 {
433 int ok = 0, nid;
434 BIGNUM *tmp_1 = NULL, *tmp_2 = NULL;
435 unsigned char *buffer_1 = NULL, *buffer_2 = NULL,
436 *a_buf = NULL, *b_buf = NULL;
437 size_t len_1, len_2;
438 unsigned char char_zero = 0;
439
440 if (!group || !curve || !curve->a || !curve->b)
441 return 0;
442
443 if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) {
444 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
445 goto err;
446 }
447
448 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
449
450 /* get a and b */
451 if (nid == NID_X9_62_prime_field) {
452 if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL)) {
453 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
454 goto err;
455 }
456 }
457 #ifndef OPENSSL_NO_EC2M
458 else { /* nid == NID_X9_62_characteristic_two_field */
459
460 if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL)) {
461 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
462 goto err;
463 }
464 }
465 #endif
466 len_1 = (size_t)BN_num_bytes(tmp_1);
467 len_2 = (size_t)BN_num_bytes(tmp_2);
468
469 if (len_1 == 0) {
470 /* len_1 == 0 => a == 0 */
471 a_buf = &char_zero;
472 len_1 = 1;
473 } else {
474 if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL) {
475 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
476 goto err;
477 }
478 if ((len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0) {
479 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
480 goto err;
481 }
482 a_buf = buffer_1;
483 }
484
485 if (len_2 == 0) {
486 /* len_2 == 0 => b == 0 */
487 b_buf = &char_zero;
488 len_2 = 1;
489 } else {
490 if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL) {
491 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
492 goto err;
493 }
494 if ((len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0) {
495 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
496 goto err;
497 }
498 b_buf = buffer_2;
499 }
500
501 /* set a and b */
502 if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) ||
503 !ASN1_OCTET_STRING_set(curve->b, b_buf, len_2)) {
504 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
505 goto err;
506 }
507
508 /* set the seed (optional) */
509 if (group->seed) {
510 if (!curve->seed)
511 if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) {
512 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
513 goto err;
514 }
515 curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
516 curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT;
517 if (!ASN1_BIT_STRING_set(curve->seed, group->seed,
518 (int)group->seed_len)) {
519 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
520 goto err;
521 }
522 } else {
523 if (curve->seed) {
524 ASN1_BIT_STRING_free(curve->seed);
525 curve->seed = NULL;
526 }
527 }
528
529 ok = 1;
530
531 err:if (buffer_1)
532 OPENSSL_free(buffer_1);
533 if (buffer_2)
534 OPENSSL_free(buffer_2);
535 if (tmp_1)
536 BN_free(tmp_1);
537 if (tmp_2)
538 BN_free(tmp_2);
539 return (ok);
540 }
541
542 static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group,
543 ECPARAMETERS *param)
544 {
545 int ok = 0;
546 size_t len = 0;
547 ECPARAMETERS *ret = NULL;
548 BIGNUM *tmp = NULL;
549 unsigned char *buffer = NULL;
550 const EC_POINT *point = NULL;
551 point_conversion_form_t form;
552
553 if ((tmp = BN_new()) == NULL) {
554 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
555 goto err;
556 }
557
558 if (param == NULL) {
559 if ((ret = ECPARAMETERS_new()) == NULL) {
560 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
561 goto err;
562 }
563 } else
564 ret = param;
565
566 /* set the version (always one) */
567 ret->version = (long)0x1;
568
569 /* set the fieldID */
570 if (!ec_asn1_group2fieldid(group, ret->fieldID)) {
571 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
572 goto err;
573 }
574
575 /* set the curve */
576 if (!ec_asn1_group2curve(group, ret->curve)) {
577 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
578 goto err;
579 }
580
581 /* set the base point */
582 if ((point = EC_GROUP_get0_generator(group)) == NULL) {
583 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, EC_R_UNDEFINED_GENERATOR);
584 goto err;
585 }
586
587 form = EC_GROUP_get_point_conversion_form(group);
588
589 len = EC_POINT_point2oct(group, point, form, NULL, len, NULL);
590 if (len == 0) {
591 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
592 goto err;
593 }
594 if ((buffer = OPENSSL_malloc(len)) == NULL) {
595 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
596 goto err;
597 }
598 if (!EC_POINT_point2oct(group, point, form, buffer, len, NULL)) {
599 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
600 goto err;
601 }
602 if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) {
603 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
604 goto err;
605 }
606 if (!ASN1_OCTET_STRING_set(ret->base, buffer, len)) {
607 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
608 goto err;
609 }
610
611 /* set the order */
612 if (!EC_GROUP_get_order(group, tmp, NULL)) {
613 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
614 goto err;
615 }
616 ret->order = BN_to_ASN1_INTEGER(tmp, ret->order);
617 if (ret->order == NULL) {
618 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
619 goto err;
620 }
621
622 /* set the cofactor (optional) */
623 if (EC_GROUP_get_cofactor(group, tmp, NULL)) {
624 ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor);
625 if (ret->cofactor == NULL) {
626 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
627 goto err;
628 }
629 }
630
631 ok = 1;
632
633 err:if (!ok) {
634 if (ret && !param)
635 ECPARAMETERS_free(ret);
636 ret = NULL;
637 }
638 if (tmp)
639 BN_free(tmp);
640 if (buffer)
641 OPENSSL_free(buffer);
642 return (ret);
643 }
644
645 ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *group,
646 ECPKPARAMETERS *params)
647 {
648 int ok = 1, tmp;
649 ECPKPARAMETERS *ret = params;
650
651 if (ret == NULL) {
652 if ((ret = ECPKPARAMETERS_new()) == NULL) {
653 ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS, ERR_R_MALLOC_FAILURE);
654 return NULL;
655 }
656 } else {
657 if (ret->type == 0 && ret->value.named_curve)
658 ASN1_OBJECT_free(ret->value.named_curve);
659 else if (ret->type == 1 && ret->value.parameters)
660 ECPARAMETERS_free(ret->value.parameters);
661 }
662
663 if (EC_GROUP_get_asn1_flag(group)) {
664 /*
665 * use the asn1 OID to describe the the elliptic curve parameters
666 */
667 tmp = EC_GROUP_get_curve_name(group);
668 if (tmp) {
669 ret->type = 0;
670 if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
671 ok = 0;
672 } else
673 /* we don't kmow the nid => ERROR */
674 ok = 0;
675 } else {
676 /* use the ECPARAMETERS structure */
677 ret->type = 1;
678 if ((ret->value.parameters =
679 ec_asn1_group2parameters(group, NULL)) == NULL)
680 ok = 0;
681 }
682
683 if (!ok) {
684 ECPKPARAMETERS_free(ret);
685 return NULL;
686 }
687 return ret;
688 }
689
690 static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *params)
691 {
692 int ok = 0, tmp;
693 EC_GROUP *ret = NULL;
694 BIGNUM *p = NULL, *a = NULL, *b = NULL;
695 EC_POINT *point = NULL;
696 long field_bits;
697
698 if (!params->fieldID || !params->fieldID->fieldType ||
699 !params->fieldID->p.ptr) {
700 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
701 goto err;
702 }
703
704 /* now extract the curve parameters a and b */
705 if (!params->curve || !params->curve->a ||
706 !params->curve->a->data || !params->curve->b ||
707 !params->curve->b->data) {
708 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
709 goto err;
710 }
711 a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL);
712 if (a == NULL) {
713 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
714 goto err;
715 }
716 b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL);
717 if (b == NULL) {
718 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
719 goto err;
720 }
721
722 /* get the field parameters */
723 tmp = OBJ_obj2nid(params->fieldID->fieldType);
724 if (tmp == NID_X9_62_characteristic_two_field)
725 #ifdef OPENSSL_NO_EC2M
726 {
727 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_GF2M_NOT_SUPPORTED);
728 goto err;
729 }
730 #else
731 {
732 X9_62_CHARACTERISTIC_TWO *char_two;
733
734 char_two = params->fieldID->p.char_two;
735
736 field_bits = char_two->m;
737 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
738 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE);
739 goto err;
740 }
741
742 if ((p = BN_new()) == NULL) {
743 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE);
744 goto err;
745 }
746
747 /* get the base type */
748 tmp = OBJ_obj2nid(char_two->type);
749
750 if (tmp == NID_X9_62_tpBasis) {
751 long tmp_long;
752
753 if (!char_two->p.tpBasis) {
754 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
755 goto err;
756 }
757
758 tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis);
759
760 if (!(char_two->m > tmp_long && tmp_long > 0)) {
761 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
762 EC_R_INVALID_TRINOMIAL_BASIS);
763 goto err;
764 }
765
766 /* create the polynomial */
767 if (!BN_set_bit(p, (int)char_two->m))
768 goto err;
769 if (!BN_set_bit(p, (int)tmp_long))
770 goto err;
771 if (!BN_set_bit(p, 0))
772 goto err;
773 } else if (tmp == NID_X9_62_ppBasis) {
774 X9_62_PENTANOMIAL *penta;
775
776 penta = char_two->p.ppBasis;
777 if (!penta) {
778 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
779 goto err;
780 }
781
782 if (!
783 (char_two->m > penta->k3 && penta->k3 > penta->k2
784 && penta->k2 > penta->k1 && penta->k1 > 0)) {
785 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
786 EC_R_INVALID_PENTANOMIAL_BASIS);
787 goto err;
788 }
789
790 /* create the polynomial */
791 if (!BN_set_bit(p, (int)char_two->m))
792 goto err;
793 if (!BN_set_bit(p, (int)penta->k1))
794 goto err;
795 if (!BN_set_bit(p, (int)penta->k2))
796 goto err;
797 if (!BN_set_bit(p, (int)penta->k3))
798 goto err;
799 if (!BN_set_bit(p, 0))
800 goto err;
801 } else if (tmp == NID_X9_62_onBasis) {
802 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_NOT_IMPLEMENTED);
803 goto err;
804 } else { /* error */
805
806 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
807 goto err;
808 }
809
810 /* create the EC_GROUP structure */
811 ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL);
812 }
813 #endif
814 else if (tmp == NID_X9_62_prime_field) {
815 /* we have a curve over a prime field */
816 /* extract the prime number */
817 if (!params->fieldID->p.prime) {
818 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
819 goto err;
820 }
821 p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL);
822 if (p == NULL) {
823 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
824 goto err;
825 }
826
827 if (BN_is_negative(p) || BN_is_zero(p)) {
828 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD);
829 goto err;
830 }
831
832 field_bits = BN_num_bits(p);
833 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
834 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE);
835 goto err;
836 }
837
838 /* create the EC_GROUP structure */
839 ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
840 } else {
841 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD);
842 goto err;
843 }
844
845 if (ret == NULL) {
846 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
847 goto err;
848 }
849
850 /* extract seed (optional) */
851 if (params->curve->seed != NULL) {
852 if (ret->seed != NULL)
853 OPENSSL_free(ret->seed);
854 if (!(ret->seed = OPENSSL_malloc(params->curve->seed->length))) {
855 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE);
856 goto err;
857 }
858 memcpy(ret->seed, params->curve->seed->data,
859 params->curve->seed->length);
860 ret->seed_len = params->curve->seed->length;
861 }
862
863 if (!params->order || !params->base || !params->base->data) {
864 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
865 goto err;
866 }
867
868 if ((point = EC_POINT_new(ret)) == NULL)
869 goto err;
870
871 /* set the point conversion form */
872 EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t)
873 (params->base->data[0] & ~0x01));
874
875 /* extract the ec point */
876 if (!EC_POINT_oct2point(ret, point, params->base->data,
877 params->base->length, NULL)) {
878 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
879 goto err;
880 }
881
882 /* extract the order */
883 if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) {
884 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
885 goto err;
886 }
887 if (BN_is_negative(a) || BN_is_zero(a)) {
888 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER);
889 goto err;
890 }
891 if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */
892 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER);
893 goto err;
894 }
895
896 /* extract the cofactor (optional) */
897 if (params->cofactor == NULL) {
898 if (b) {
899 BN_free(b);
900 b = NULL;
901 }
902 } else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) {
903 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
904 goto err;
905 }
906 /* set the generator, order and cofactor (if present) */
907 if (!EC_GROUP_set_generator(ret, point, a, b)) {
908 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
909 goto err;
910 }
911
912 ok = 1;
913
914 err:if (!ok) {
915 if (ret)
916 EC_GROUP_clear_free(ret);
917 ret = NULL;
918 }
919
920 if (p)
921 BN_free(p);
922 if (a)
923 BN_free(a);
924 if (b)
925 BN_free(b);
926 if (point)
927 EC_POINT_free(point);
928 return (ret);
929 }
930
931 EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *params)
932 {
933 EC_GROUP *ret = NULL;
934 int tmp = 0;
935
936 if (params == NULL) {
937 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_MISSING_PARAMETERS);
938 return NULL;
939 }
940
941 if (params->type == 0) { /* the curve is given by an OID */
942 tmp = OBJ_obj2nid(params->value.named_curve);
943 if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) {
944 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP,
945 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
946 return NULL;
947 }
948 EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE);
949 } else if (params->type == 1) { /* the parameters are given by a
950 * ECPARAMETERS structure */
951 ret = ec_asn1_parameters2group(params->value.parameters);
952 if (!ret) {
953 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, ERR_R_EC_LIB);
954 return NULL;
955 }
956 EC_GROUP_set_asn1_flag(ret, 0x0);
957 } else if (params->type == 2) { /* implicitlyCA */
958 return NULL;
959 } else {
960 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_ASN1_ERROR);
961 return NULL;
962 }
963
964 return ret;
965 }
966
967 /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
968
969 EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len)
970 {
971 EC_GROUP *group = NULL;
972 ECPKPARAMETERS *params = NULL;
973
974 if ((params = d2i_ECPKPARAMETERS(NULL, in, len)) == NULL) {
975 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
976 ECPKPARAMETERS_free(params);
977 return NULL;
978 }
979
980 if ((group = ec_asn1_pkparameters2group(params)) == NULL) {
981 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
982 ECPKPARAMETERS_free(params);
983 return NULL;
984 }
985
986 if (a && *a)
987 EC_GROUP_clear_free(*a);
988 if (a)
989 *a = group;
990
991 ECPKPARAMETERS_free(params);
992 return (group);
993 }
994
995 int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out)
996 {
997 int ret = 0;
998 ECPKPARAMETERS *tmp = ec_asn1_group2pkparameters(a, NULL);
999 if (tmp == NULL) {
1000 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE);
1001 return 0;
1002 }
1003 if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) {
1004 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE);
1005 ECPKPARAMETERS_free(tmp);
1006 return 0;
1007 }
1008 ECPKPARAMETERS_free(tmp);
1009 return (ret);
1010 }
1011
1012 /* some EC_KEY functions */
1013
1014 EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len)
1015 {
1016 int ok = 0;
1017 EC_KEY *ret = NULL;
1018 EC_PRIVATEKEY *priv_key = NULL;
1019
1020 if ((priv_key = d2i_EC_PRIVATEKEY(NULL, in, len)) == NULL) {
1021 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1022 return NULL;
1023 }
1024
1025 if (a == NULL || *a == NULL) {
1026 if ((ret = EC_KEY_new()) == NULL) {
1027 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1028 goto err;
1029 }
1030 } else
1031 ret = *a;
1032
1033 if (priv_key->parameters) {
1034 if (ret->group)
1035 EC_GROUP_clear_free(ret->group);
1036 ret->group = ec_asn1_pkparameters2group(priv_key->parameters);
1037 }
1038
1039 if (ret->group == NULL) {
1040 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1041 goto err;
1042 }
1043
1044 ret->version = priv_key->version;
1045
1046 if (priv_key->privateKey) {
1047 ret->priv_key = BN_bin2bn(ASN1_STRING_data(priv_key->privateKey),
1048 ASN1_STRING_length(priv_key->privateKey),
1049 ret->priv_key);
1050 if (ret->priv_key == NULL) {
1051 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_BN_LIB);
1052 goto err;
1053 }
1054 } else {
1055 ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY);
1056 goto err;
1057 }
1058
1059 if (ret->pub_key)
1060 EC_POINT_clear_free(ret->pub_key);
1061 ret->pub_key = EC_POINT_new(ret->group);
1062 if (ret->pub_key == NULL) {
1063 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1064 goto err;
1065 }
1066
1067 if (priv_key->publicKey) {
1068 const unsigned char *pub_oct;
1069 int pub_oct_len;
1070
1071 pub_oct = ASN1_STRING_data(priv_key->publicKey);
1072 pub_oct_len = ASN1_STRING_length(priv_key->publicKey);
1073 /*
1074 * The first byte - point conversion form - must be present.
1075 */
1076 if (pub_oct_len <= 0) {
1077 ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_BUFFER_TOO_SMALL);
1078 goto err;
1079 }
1080 /* Save the point conversion form. */
1081 ret->conv_form = (point_conversion_form_t) (pub_oct[0] & ~0x01);
1082 if (!EC_POINT_oct2point(ret->group, ret->pub_key,
1083 pub_oct, (size_t)(pub_oct_len), NULL)) {
1084 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1085 goto err;
1086 }
1087 } else {
1088 if (!EC_POINT_mul
1089 (ret->group, ret->pub_key, ret->priv_key, NULL, NULL, NULL)) {
1090 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1091 goto err;
1092 }
1093 /* Remember the original private-key-only encoding. */
1094 ret->enc_flag |= EC_PKEY_NO_PUBKEY;
1095 }
1096
1097 if (a)
1098 *a = ret;
1099 ok = 1;
1100 err:
1101 if (!ok) {
1102 if (ret && (a == NULL || *a != ret))
1103 EC_KEY_free(ret);
1104 ret = NULL;
1105 }
1106
1107 if (priv_key)
1108 EC_PRIVATEKEY_free(priv_key);
1109
1110 return (ret);
1111 }
1112
1113 int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out)
1114 {
1115 int ret = 0, ok = 0;
1116 unsigned char *buffer = NULL;
1117 size_t buf_len = 0, tmp_len;
1118 EC_PRIVATEKEY *priv_key = NULL;
1119
1120 if (a == NULL || a->group == NULL || a->priv_key == NULL ||
1121 (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) {
1122 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
1123 goto err;
1124 }
1125
1126 if ((priv_key = EC_PRIVATEKEY_new()) == NULL) {
1127 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1128 goto err;
1129 }
1130
1131 priv_key->version = a->version;
1132
1133 buf_len = (size_t)BN_num_bytes(a->priv_key);
1134 buffer = OPENSSL_malloc(buf_len);
1135 if (buffer == NULL) {
1136 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1137 goto err;
1138 }
1139
1140 if (!BN_bn2bin(a->priv_key, buffer)) {
1141 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_BN_LIB);
1142 goto err;
1143 }
1144
1145 if (!ASN1_OCTET_STRING_set(priv_key->privateKey, buffer, buf_len)) {
1146 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
1147 goto err;
1148 }
1149
1150 if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) {
1151 if ((priv_key->parameters =
1152 ec_asn1_group2pkparameters(a->group,
1153 priv_key->parameters)) == NULL) {
1154 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1155 goto err;
1156 }
1157 }
1158
1159 if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) {
1160 priv_key->publicKey = ASN1_BIT_STRING_new();
1161 if (priv_key->publicKey == NULL) {
1162 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1163 goto err;
1164 }
1165
1166 tmp_len = EC_POINT_point2oct(a->group, a->pub_key,
1167 a->conv_form, NULL, 0, NULL);
1168
1169 if (tmp_len > buf_len) {
1170 unsigned char *tmp_buffer = OPENSSL_realloc(buffer, tmp_len);
1171 if (!tmp_buffer) {
1172 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1173 goto err;
1174 }
1175 buffer = tmp_buffer;
1176 buf_len = tmp_len;
1177 }
1178
1179 if (!EC_POINT_point2oct(a->group, a->pub_key,
1180 a->conv_form, buffer, buf_len, NULL)) {
1181 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1182 goto err;
1183 }
1184
1185 priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
1186 priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
1187 if (!ASN1_BIT_STRING_set(priv_key->publicKey, buffer, buf_len)) {
1188 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
1189 goto err;
1190 }
1191 }
1192
1193 if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) {
1194 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1195 goto err;
1196 }
1197 ok = 1;
1198 err:
1199 if (buffer)
1200 OPENSSL_free(buffer);
1201 if (priv_key)
1202 EC_PRIVATEKEY_free(priv_key);
1203 return (ok ? ret : 0);
1204 }
1205
1206 int i2d_ECParameters(EC_KEY *a, unsigned char **out)
1207 {
1208 if (a == NULL) {
1209 ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1210 return 0;
1211 }
1212 return i2d_ECPKParameters(a->group, out);
1213 }
1214
1215 EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len)
1216 {
1217 EC_KEY *ret;
1218
1219 if (in == NULL || *in == NULL) {
1220 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1221 return NULL;
1222 }
1223
1224 if (a == NULL || *a == NULL) {
1225 if ((ret = EC_KEY_new()) == NULL) {
1226 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
1227 return NULL;
1228 }
1229 } else
1230 ret = *a;
1231
1232 if (!d2i_ECPKParameters(&ret->group, in, len)) {
1233 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
1234 if (a == NULL || *a != ret)
1235 EC_KEY_free(ret);
1236 return NULL;
1237 }
1238
1239 if (a)
1240 *a = ret;
1241
1242 return ret;
1243 }
1244
1245 EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len)
1246 {
1247 EC_KEY *ret = NULL;
1248
1249 if (a == NULL || (*a) == NULL || (*a)->group == NULL) {
1250 /*
1251 * sorry, but a EC_GROUP-structur is necessary to set the public key
1252 */
1253 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1254 return 0;
1255 }
1256 ret = *a;
1257 if (ret->pub_key == NULL &&
1258 (ret->pub_key = EC_POINT_new(ret->group)) == NULL) {
1259 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
1260 return 0;
1261 }
1262 if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL)) {
1263 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB);
1264 return 0;
1265 }
1266 /* save the point conversion form */
1267 ret->conv_form = (point_conversion_form_t) (*in[0] & ~0x01);
1268 *in += len;
1269 return ret;
1270 }
1271
1272 int i2o_ECPublicKey(EC_KEY *a, unsigned char **out)
1273 {
1274 size_t buf_len = 0;
1275 int new_buffer = 0;
1276
1277 if (a == NULL) {
1278 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1279 return 0;
1280 }
1281
1282 buf_len = EC_POINT_point2oct(a->group, a->pub_key,
1283 a->conv_form, NULL, 0, NULL);
1284
1285 if (out == NULL || buf_len == 0)
1286 /* out == NULL => just return the length of the octet string */
1287 return buf_len;
1288
1289 if (*out == NULL) {
1290 if ((*out = OPENSSL_malloc(buf_len)) == NULL) {
1291 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
1292 return 0;
1293 }
1294 new_buffer = 1;
1295 }
1296 if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form,
1297 *out, buf_len, NULL)) {
1298 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB);
1299 if (new_buffer) {
1300 OPENSSL_free(*out);
1301 *out = NULL;
1302 }
1303 return 0;
1304 }
1305 if (!new_buffer)
1306 *out += buf_len;
1307 return buf_len;
1308 }
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