]> git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/ec/ec_asn1.c
projects / thirdparty / openssl.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
free NULL cleanup.
[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 ASN1_OBJECT_free(field->fieldType);
321 if (field->p.other != NULL)
322 ASN1_TYPE_free(field->p.other);
323
324 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
325 /* set OID for the field */
326 if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) {
327 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
328 goto err;
329 }
330
331 if (nid == NID_X9_62_prime_field) {
332 if ((tmp = BN_new()) == NULL) {
333 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
334 goto err;
335 }
336 /* the parameters are specified by the prime number p */
337 if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL)) {
338 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
339 goto err;
340 }
341 /* set the prime number */
342 field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL);
343 if (field->p.prime == NULL) {
344 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
345 goto err;
346 }
347 } else /* nid == NID_X9_62_characteristic_two_field */
348 #ifdef OPENSSL_NO_EC2M
349 {
350 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED);
351 goto err;
352 }
353 #else
354 {
355 int field_type;
356 X9_62_CHARACTERISTIC_TWO *char_two;
357
358 field->p.char_two = X9_62_CHARACTERISTIC_TWO_new();
359 char_two = field->p.char_two;
360
361 if (char_two == NULL) {
362 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
363 goto err;
364 }
365
366 char_two->m = (long)EC_GROUP_get_degree(group);
367
368 field_type = EC_GROUP_get_basis_type(group);
369
370 if (field_type == 0) {
371 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
372 goto err;
373 }
374 /* set base type OID */
375 if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) {
376 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
377 goto err;
378 }
379
380 if (field_type == NID_X9_62_tpBasis) {
381 unsigned int k;
382
383 if (!EC_GROUP_get_trinomial_basis(group, &k))
384 goto err;
385
386 char_two->p.tpBasis = ASN1_INTEGER_new();
387 if (!char_two->p.tpBasis) {
388 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
389 goto err;
390 }
391 if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) {
392 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
393 goto err;
394 }
395 } else if (field_type == NID_X9_62_ppBasis) {
396 unsigned int k1, k2, k3;
397
398 if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3))
399 goto err;
400
401 char_two->p.ppBasis = X9_62_PENTANOMIAL_new();
402 if (!char_two->p.ppBasis) {
403 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
404 goto err;
405 }
406
407 /* set k? values */
408 char_two->p.ppBasis->k1 = (long)k1;
409 char_two->p.ppBasis->k2 = (long)k2;
410 char_two->p.ppBasis->k3 = (long)k3;
411 } else { /* field_type == NID_X9_62_onBasis */
412
413 /* for ONB the parameters are (asn1) NULL */
414 char_two->p.onBasis = ASN1_NULL_new();
415 if (!char_two->p.onBasis) {
416 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
417 goto err;
418 }
419 }
420 }
421 #endif
422
423 ok = 1;
424
425 err:if (tmp)
426 BN_free(tmp);
427 return (ok);
428 }
429
430 static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve)
431 {
432 int ok = 0, nid;
433 BIGNUM *tmp_1 = NULL, *tmp_2 = NULL;
434 unsigned char *buffer_1 = NULL, *buffer_2 = NULL,
435 *a_buf = NULL, *b_buf = NULL;
436 size_t len_1, len_2;
437 unsigned char char_zero = 0;
438
439 if (!group || !curve || !curve->a || !curve->b)
440 return 0;
441
442 if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) {
443 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
444 goto err;
445 }
446
447 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
448
449 /* get a and b */
450 if (nid == NID_X9_62_prime_field) {
451 if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL)) {
452 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
453 goto err;
454 }
455 }
456 #ifndef OPENSSL_NO_EC2M
457 else { /* nid == NID_X9_62_characteristic_two_field */
458
459 if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL)) {
460 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
461 goto err;
462 }
463 }
464 #endif
465 len_1 = (size_t)BN_num_bytes(tmp_1);
466 len_2 = (size_t)BN_num_bytes(tmp_2);
467
468 if (len_1 == 0) {
469 /* len_1 == 0 => a == 0 */
470 a_buf = &char_zero;
471 len_1 = 1;
472 } else {
473 if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL) {
474 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
475 goto err;
476 }
477 if ((len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0) {
478 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
479 goto err;
480 }
481 a_buf = buffer_1;
482 }
483
484 if (len_2 == 0) {
485 /* len_2 == 0 => b == 0 */
486 b_buf = &char_zero;
487 len_2 = 1;
488 } else {
489 if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL) {
490 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
491 goto err;
492 }
493 if ((len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0) {
494 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
495 goto err;
496 }
497 b_buf = buffer_2;
498 }
499
500 /* set a and b */
501 if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) ||
502 !ASN1_OCTET_STRING_set(curve->b, b_buf, len_2)) {
503 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
504 goto err;
505 }
506
507 /* set the seed (optional) */
508 if (group->seed) {
509 if (!curve->seed)
510 if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) {
511 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
512 goto err;
513 }
514 curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
515 curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT;
516 if (!ASN1_BIT_STRING_set(curve->seed, group->seed,
517 (int)group->seed_len)) {
518 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
519 goto err;
520 }
521 } else {
522 if (curve->seed) {
523 ASN1_BIT_STRING_free(curve->seed);
524 curve->seed = NULL;
525 }
526 }
527
528 ok = 1;
529
530 err:if (buffer_1)
531 OPENSSL_free(buffer_1);
532 if (buffer_2)
533 OPENSSL_free(buffer_2);
534 if (tmp_1)
535 BN_free(tmp_1);
536 if (tmp_2)
537 BN_free(tmp_2);
538 return (ok);
539 }
540
541 static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group,
542 ECPARAMETERS *param)
543 {
544 int ok = 0;
545 size_t len = 0;
546 ECPARAMETERS *ret = NULL;
547 BIGNUM *tmp = NULL;
548 unsigned char *buffer = NULL;
549 const EC_POINT *point = NULL;
550 point_conversion_form_t form;
551
552 if ((tmp = BN_new()) == NULL) {
553 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
554 goto err;
555 }
556
557 if (param == NULL) {
558 if ((ret = ECPARAMETERS_new()) == NULL) {
559 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
560 goto err;
561 }
562 } else
563 ret = param;
564
565 /* set the version (always one) */
566 ret->version = (long)0x1;
567
568 /* set the fieldID */
569 if (!ec_asn1_group2fieldid(group, ret->fieldID)) {
570 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
571 goto err;
572 }
573
574 /* set the curve */
575 if (!ec_asn1_group2curve(group, ret->curve)) {
576 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
577 goto err;
578 }
579
580 /* set the base point */
581 if ((point = EC_GROUP_get0_generator(group)) == NULL) {
582 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, EC_R_UNDEFINED_GENERATOR);
583 goto err;
584 }
585
586 form = EC_GROUP_get_point_conversion_form(group);
587
588 len = EC_POINT_point2oct(group, point, form, NULL, len, NULL);
589 if (len == 0) {
590 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
591 goto err;
592 }
593 if ((buffer = OPENSSL_malloc(len)) == NULL) {
594 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
595 goto err;
596 }
597 if (!EC_POINT_point2oct(group, point, form, buffer, len, NULL)) {
598 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
599 goto err;
600 }
601 if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) {
602 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
603 goto err;
604 }
605 if (!ASN1_OCTET_STRING_set(ret->base, buffer, len)) {
606 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
607 goto err;
608 }
609
610 /* set the order */
611 if (!EC_GROUP_get_order(group, tmp, NULL)) {
612 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
613 goto err;
614 }
615 ret->order = BN_to_ASN1_INTEGER(tmp, ret->order);
616 if (ret->order == NULL) {
617 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
618 goto err;
619 }
620
621 /* set the cofactor (optional) */
622 if (EC_GROUP_get_cofactor(group, tmp, NULL)) {
623 ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor);
624 if (ret->cofactor == NULL) {
625 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
626 goto err;
627 }
628 }
629
630 ok = 1;
631
632 err:if (!ok) {
633 if (ret && !param)
634 ECPARAMETERS_free(ret);
635 ret = NULL;
636 }
637 if (tmp)
638 BN_free(tmp);
639 if (buffer)
640 OPENSSL_free(buffer);
641 return (ret);
642 }
643
644 ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *group,
645 ECPKPARAMETERS *params)
646 {
647 int ok = 1, tmp;
648 ECPKPARAMETERS *ret = params;
649
650 if (ret == NULL) {
651 if ((ret = ECPKPARAMETERS_new()) == NULL) {
652 ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS, ERR_R_MALLOC_FAILURE);
653 return NULL;
654 }
655 } else {
656 if (ret->type == 0)
657 ASN1_OBJECT_free(ret->value.named_curve);
658 else if (ret->type == 1 && ret->value.parameters)
659 ECPARAMETERS_free(ret->value.parameters);
660 }
661
662 if (EC_GROUP_get_asn1_flag(group)) {
663 /*
664 * use the asn1 OID to describe the the elliptic curve parameters
665 */
666 tmp = EC_GROUP_get_curve_name(group);
667 if (tmp) {
668 ret->type = 0;
669 if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
670 ok = 0;
671 } else
672 /* we don't kmow the nid => ERROR */
673 ok = 0;
674 } else {
675 /* use the ECPARAMETERS structure */
676 ret->type = 1;
677 if ((ret->value.parameters =
678 ec_asn1_group2parameters(group, NULL)) == NULL)
679 ok = 0;
680 }
681
682 if (!ok) {
683 ECPKPARAMETERS_free(ret);
684 return NULL;
685 }
686 return ret;
687 }
688
689 static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *params)
690 {
691 int ok = 0, tmp;
692 EC_GROUP *ret = NULL;
693 BIGNUM *p = NULL, *a = NULL, *b = NULL;
694 EC_POINT *point = NULL;
695 long field_bits;
696
697 if (!params->fieldID || !params->fieldID->fieldType ||
698 !params->fieldID->p.ptr) {
699 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
700 goto err;
701 }
702
703 /* now extract the curve parameters a and b */
704 if (!params->curve || !params->curve->a ||
705 !params->curve->a->data || !params->curve->b ||
706 !params->curve->b->data) {
707 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
708 goto err;
709 }
710 a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL);
711 if (a == NULL) {
712 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
713 goto err;
714 }
715 b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL);
716 if (b == NULL) {
717 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
718 goto err;
719 }
720
721 /* get the field parameters */
722 tmp = OBJ_obj2nid(params->fieldID->fieldType);
723 if (tmp == NID_X9_62_characteristic_two_field)
724 #ifdef OPENSSL_NO_EC2M
725 {
726 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_GF2M_NOT_SUPPORTED);
727 goto err;
728 }
729 #else
730 {
731 X9_62_CHARACTERISTIC_TWO *char_two;
732
733 char_two = params->fieldID->p.char_two;
734
735 field_bits = char_two->m;
736 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
737 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE);
738 goto err;
739 }
740
741 if ((p = BN_new()) == NULL) {
742 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE);
743 goto err;
744 }
745
746 /* get the base type */
747 tmp = OBJ_obj2nid(char_two->type);
748
749 if (tmp == NID_X9_62_tpBasis) {
750 long tmp_long;
751
752 if (!char_two->p.tpBasis) {
753 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
754 goto err;
755 }
756
757 tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis);
758
759 if (!(char_two->m > tmp_long && tmp_long > 0)) {
760 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
761 EC_R_INVALID_TRINOMIAL_BASIS);
762 goto err;
763 }
764
765 /* create the polynomial */
766 if (!BN_set_bit(p, (int)char_two->m))
767 goto err;
768 if (!BN_set_bit(p, (int)tmp_long))
769 goto err;
770 if (!BN_set_bit(p, 0))
771 goto err;
772 } else if (tmp == NID_X9_62_ppBasis) {
773 X9_62_PENTANOMIAL *penta;
774
775 penta = char_two->p.ppBasis;
776 if (!penta) {
777 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
778 goto err;
779 }
780
781 if (!
782 (char_two->m > penta->k3 && penta->k3 > penta->k2
783 && penta->k2 > penta->k1 && penta->k1 > 0)) {
784 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
785 EC_R_INVALID_PENTANOMIAL_BASIS);
786 goto err;
787 }
788
789 /* create the polynomial */
790 if (!BN_set_bit(p, (int)char_two->m))
791 goto err;
792 if (!BN_set_bit(p, (int)penta->k1))
793 goto err;
794 if (!BN_set_bit(p, (int)penta->k2))
795 goto err;
796 if (!BN_set_bit(p, (int)penta->k3))
797 goto err;
798 if (!BN_set_bit(p, 0))
799 goto err;
800 } else if (tmp == NID_X9_62_onBasis) {
801 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_NOT_IMPLEMENTED);
802 goto err;
803 } else { /* error */
804
805 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
806 goto err;
807 }
808
809 /* create the EC_GROUP structure */
810 ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL);
811 }
812 #endif
813 else if (tmp == NID_X9_62_prime_field) {
814 /* we have a curve over a prime field */
815 /* extract the prime number */
816 if (!params->fieldID->p.prime) {
817 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
818 goto err;
819 }
820 p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL);
821 if (p == NULL) {
822 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
823 goto err;
824 }
825
826 if (BN_is_negative(p) || BN_is_zero(p)) {
827 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD);
828 goto err;
829 }
830
831 field_bits = BN_num_bits(p);
832 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
833 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE);
834 goto err;
835 }
836
837 /* create the EC_GROUP structure */
838 ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
839 } else {
840 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD);
841 goto err;
842 }
843
844 if (ret == NULL) {
845 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
846 goto err;
847 }
848
849 /* extract seed (optional) */
850 if (params->curve->seed != NULL) {
851 if (ret->seed != NULL)
852 OPENSSL_free(ret->seed);
853 if (!(ret->seed = OPENSSL_malloc(params->curve->seed->length))) {
854 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE);
855 goto err;
856 }
857 memcpy(ret->seed, params->curve->seed->data,
858 params->curve->seed->length);
859 ret->seed_len = params->curve->seed->length;
860 }
861
862 if (!params->order || !params->base || !params->base->data) {
863 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
864 goto err;
865 }
866
867 if ((point = EC_POINT_new(ret)) == NULL)
868 goto err;
869
870 /* set the point conversion form */
871 EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t)
872 (params->base->data[0] & ~0x01));
873
874 /* extract the ec point */
875 if (!EC_POINT_oct2point(ret, point, params->base->data,
876 params->base->length, NULL)) {
877 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
878 goto err;
879 }
880
881 /* extract the order */
882 if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) {
883 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
884 goto err;
885 }
886 if (BN_is_negative(a) || BN_is_zero(a)) {
887 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER);
888 goto err;
889 }
890 if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */
891 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER);
892 goto err;
893 }
894
895 /* extract the cofactor (optional) */
896 if (params->cofactor == NULL) {
897 if (b) {
898 BN_free(b);
899 b = NULL;
900 }
901 } else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) {
902 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
903 goto err;
904 }
905 /* set the generator, order and cofactor (if present) */
906 if (!EC_GROUP_set_generator(ret, point, a, b)) {
907 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
908 goto err;
909 }
910
911 ok = 1;
912
913 err:
914 if (!ok) {
915 EC_GROUP_clear_free(ret);
916 ret = NULL;
917 }
918
919 if (p)
920 BN_free(p);
921 if (a)
922 BN_free(a);
923 if (b)
924 BN_free(b);
925 EC_POINT_free(point);
926 return (ret);
927 }
928
929 EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *params)
930 {
931 EC_GROUP *ret = NULL;
932 int tmp = 0;
933
934 if (params == NULL) {
935 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_MISSING_PARAMETERS);
936 return NULL;
937 }
938
939 if (params->type == 0) { /* the curve is given by an OID */
940 tmp = OBJ_obj2nid(params->value.named_curve);
941 if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) {
942 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP,
943 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
944 return NULL;
945 }
946 EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE);
947 } else if (params->type == 1) { /* the parameters are given by a
948 * ECPARAMETERS structure */
949 ret = ec_asn1_parameters2group(params->value.parameters);
950 if (!ret) {
951 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, ERR_R_EC_LIB);
952 return NULL;
953 }
954 EC_GROUP_set_asn1_flag(ret, 0x0);
955 } else if (params->type == 2) { /* implicitlyCA */
956 return NULL;
957 } else {
958 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_ASN1_ERROR);
959 return NULL;
960 }
961
962 return ret;
963 }
964
965 /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
966
967 EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len)
968 {
969 EC_GROUP *group = NULL;
970 ECPKPARAMETERS *params = NULL;
971
972 if ((params = d2i_ECPKPARAMETERS(NULL, in, len)) == NULL) {
973 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
974 ECPKPARAMETERS_free(params);
975 return NULL;
976 }
977
978 if ((group = ec_asn1_pkparameters2group(params)) == NULL) {
979 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
980 ECPKPARAMETERS_free(params);
981 return NULL;
982 }
983
984 if (a) {
985 EC_GROUP_clear_free(*a);
986 *a = group;
987 }
988
989 ECPKPARAMETERS_free(params);
990 return (group);
991 }
992
993 int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out)
994 {
995 int ret = 0;
996 ECPKPARAMETERS *tmp = ec_asn1_group2pkparameters(a, NULL);
997 if (tmp == NULL) {
998 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE);
999 return 0;
1000 }
1001 if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) {
1002 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE);
1003 ECPKPARAMETERS_free(tmp);
1004 return 0;
1005 }
1006 ECPKPARAMETERS_free(tmp);
1007 return (ret);
1008 }
1009
1010 /* some EC_KEY functions */
1011
1012 EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len)
1013 {
1014 int ok = 0;
1015 EC_KEY *ret = NULL;
1016 EC_PRIVATEKEY *priv_key = NULL;
1017
1018 if ((priv_key = d2i_EC_PRIVATEKEY(NULL, in, len)) == NULL) {
1019 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1020 return NULL;
1021 }
1022
1023 if (a == NULL || *a == NULL) {
1024 if ((ret = EC_KEY_new()) == NULL) {
1025 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1026 goto err;
1027 }
1028 } else
1029 ret = *a;
1030
1031 if (priv_key->parameters) {
1032 EC_GROUP_clear_free(ret->group);
1033 ret->group = ec_asn1_pkparameters2group(priv_key->parameters);
1034 }
1035
1036 if (ret->group == NULL) {
1037 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1038 goto err;
1039 }
1040
1041 ret->version = priv_key->version;
1042
1043 if (priv_key->privateKey) {
1044 ret->priv_key = BN_bin2bn(ASN1_STRING_data(priv_key->privateKey),
1045 ASN1_STRING_length(priv_key->privateKey),
1046 ret->priv_key);
1047 if (ret->priv_key == NULL) {
1048 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_BN_LIB);
1049 goto err;
1050 }
1051 } else {
1052 ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY);
1053 goto err;
1054 }
1055
1056 EC_POINT_clear_free(ret->pub_key);
1057 ret->pub_key = EC_POINT_new(ret->group);
1058 if (ret->pub_key == NULL) {
1059 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1060 goto err;
1061 }
1062
1063 if (priv_key->publicKey) {
1064 const unsigned char *pub_oct;
1065 int pub_oct_len;
1066
1067 pub_oct = ASN1_STRING_data(priv_key->publicKey);
1068 pub_oct_len = ASN1_STRING_length(priv_key->publicKey);
1069 /*
1070 * The first byte - point conversion form - must be present.
1071 */
1072 if (pub_oct_len <= 0) {
1073 ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_BUFFER_TOO_SMALL);
1074 goto err;
1075 }
1076 /* Save the point conversion form. */
1077 ret->conv_form = (point_conversion_form_t) (pub_oct[0] & ~0x01);
1078 if (!EC_POINT_oct2point(ret->group, ret->pub_key,
1079 pub_oct, (size_t)(pub_oct_len), NULL)) {
1080 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1081 goto err;
1082 }
1083 } else {
1084 if (!EC_POINT_mul
1085 (ret->group, ret->pub_key, ret->priv_key, NULL, NULL, NULL)) {
1086 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1087 goto err;
1088 }
1089 /* Remember the original private-key-only encoding. */
1090 ret->enc_flag |= EC_PKEY_NO_PUBKEY;
1091 }
1092
1093 if (a)
1094 *a = ret;
1095 ok = 1;
1096 err:
1097 if (!ok) {
1098 if (a == NULL || *a != ret)
1099 EC_KEY_free(ret);
1100 ret = NULL;
1101 }
1102
1103 if (priv_key)
1104 EC_PRIVATEKEY_free(priv_key);
1105
1106 return (ret);
1107 }
1108
1109 int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out)
1110 {
1111 int ret = 0, ok = 0;
1112 unsigned char *buffer = NULL;
1113 size_t buf_len = 0, tmp_len;
1114 EC_PRIVATEKEY *priv_key = NULL;
1115
1116 if (a == NULL || a->group == NULL || a->priv_key == NULL ||
1117 (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) {
1118 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
1119 goto err;
1120 }
1121
1122 if ((priv_key = EC_PRIVATEKEY_new()) == NULL) {
1123 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1124 goto err;
1125 }
1126
1127 priv_key->version = a->version;
1128
1129 buf_len = (size_t)BN_num_bytes(a->priv_key);
1130 buffer = OPENSSL_malloc(buf_len);
1131 if (buffer == NULL) {
1132 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1133 goto err;
1134 }
1135
1136 if (!BN_bn2bin(a->priv_key, buffer)) {
1137 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_BN_LIB);
1138 goto err;
1139 }
1140
1141 if (!ASN1_OCTET_STRING_set(priv_key->privateKey, buffer, buf_len)) {
1142 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
1143 goto err;
1144 }
1145
1146 if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) {
1147 if ((priv_key->parameters =
1148 ec_asn1_group2pkparameters(a->group,
1149 priv_key->parameters)) == NULL) {
1150 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1151 goto err;
1152 }
1153 }
1154
1155 if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) {
1156 priv_key->publicKey = ASN1_BIT_STRING_new();
1157 if (priv_key->publicKey == NULL) {
1158 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1159 goto err;
1160 }
1161
1162 tmp_len = EC_POINT_point2oct(a->group, a->pub_key,
1163 a->conv_form, NULL, 0, NULL);
1164
1165 if (tmp_len > buf_len) {
1166 unsigned char *tmp_buffer = OPENSSL_realloc(buffer, tmp_len);
1167 if (!tmp_buffer) {
1168 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1169 goto err;
1170 }
1171 buffer = tmp_buffer;
1172 buf_len = tmp_len;
1173 }
1174
1175 if (!EC_POINT_point2oct(a->group, a->pub_key,
1176 a->conv_form, buffer, buf_len, NULL)) {
1177 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1178 goto err;
1179 }
1180
1181 priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
1182 priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
1183 if (!ASN1_BIT_STRING_set(priv_key->publicKey, buffer, buf_len)) {
1184 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
1185 goto err;
1186 }
1187 }
1188
1189 if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) {
1190 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1191 goto err;
1192 }
1193 ok = 1;
1194 err:
1195 if (buffer)
1196 OPENSSL_free(buffer);
1197 if (priv_key)
1198 EC_PRIVATEKEY_free(priv_key);
1199 return (ok ? ret : 0);
1200 }
1201
1202 int i2d_ECParameters(EC_KEY *a, unsigned char **out)
1203 {
1204 if (a == NULL) {
1205 ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1206 return 0;
1207 }
1208 return i2d_ECPKParameters(a->group, out);
1209 }
1210
1211 EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len)
1212 {
1213 EC_KEY *ret;
1214
1215 if (in == NULL || *in == NULL) {
1216 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1217 return NULL;
1218 }
1219
1220 if (a == NULL || *a == NULL) {
1221 if ((ret = EC_KEY_new()) == NULL) {
1222 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
1223 return NULL;
1224 }
1225 } else
1226 ret = *a;
1227
1228 if (!d2i_ECPKParameters(&ret->group, in, len)) {
1229 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
1230 if (a == NULL || *a != ret)
1231 EC_KEY_free(ret);
1232 return NULL;
1233 }
1234
1235 if (a)
1236 *a = ret;
1237
1238 return ret;
1239 }
1240
1241 EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len)
1242 {
1243 EC_KEY *ret = NULL;
1244
1245 if (a == NULL || (*a) == NULL || (*a)->group == NULL) {
1246 /*
1247 * sorry, but a EC_GROUP-structur is necessary to set the public key
1248 */
1249 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1250 return 0;
1251 }
1252 ret = *a;
1253 if (ret->pub_key == NULL &&
1254 (ret->pub_key = EC_POINT_new(ret->group)) == NULL) {
1255 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
1256 return 0;
1257 }
1258 if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL)) {
1259 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB);
1260 return 0;
1261 }
1262 /* save the point conversion form */
1263 ret->conv_form = (point_conversion_form_t) (*in[0] & ~0x01);
1264 *in += len;
1265 return ret;
1266 }
1267
1268 int i2o_ECPublicKey(EC_KEY *a, unsigned char **out)
1269 {
1270 size_t buf_len = 0;
1271 int new_buffer = 0;
1272
1273 if (a == NULL) {
1274 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1275 return 0;
1276 }
1277
1278 buf_len = EC_POINT_point2oct(a->group, a->pub_key,
1279 a->conv_form, NULL, 0, NULL);
1280
1281 if (out == NULL || buf_len == 0)
1282 /* out == NULL => just return the length of the octet string */
1283 return buf_len;
1284
1285 if (*out == NULL) {
1286 if ((*out = OPENSSL_malloc(buf_len)) == NULL) {
1287 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
1288 return 0;
1289 }
1290 new_buffer = 1;
1291 }
1292 if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form,
1293 *out, buf_len, NULL)) {
1294 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB);
1295 if (new_buffer) {
1296 OPENSSL_free(*out);
1297 *out = NULL;
1298 }
1299 return 0;
1300 }
1301 if (!new_buffer)
1302 *out += buf_len;
1303 return buf_len;
1304 }
A mirror of the official openssl repository