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General improvements to the ec_asn1.c code. This squashes at least one bug
[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
66 int EC_GROUP_get_basis_type(const EC_GROUP *group)
67 {
68 int i=0;
69
70 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
71 NID_X9_62_characteristic_two_field)
72 /* everything else is currently not supported */
73 return 0;
74
75 while (group->poly[i] != 0)
76 i++;
77
78 if (i == 4)
79 return NID_X9_62_ppBasis;
80 else if (i == 2)
81 return NID_X9_62_tpBasis;
82 else
83 /* everything else is currently not supported */
84 return 0;
85 }
86
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_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_set_curve
93 || !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[2] == 0)))
94 {
95 ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
96 return 0;
97 }
98
99 if (k)
100 *k = group->poly[1];
101
102 return 1;
103 }
104
105 int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1,
106 unsigned int *k2, unsigned int *k3)
107 {
108 if (group == NULL)
109 return 0;
110
111 if (EC_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_set_curve
112 || !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[2] != 0) && (group->poly[3] != 0) && (group->poly[4] == 0)))
113 {
114 ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
115 return 0;
116 }
117
118 if (k1)
119 *k1 = group->poly[3];
120 if (k2)
121 *k2 = group->poly[2];
122 if (k3)
123 *k3 = group->poly[1];
124
125 return 1;
126 }
127
128
129
130 /* some structures needed for the asn1 encoding */
131 typedef struct x9_62_pentanomial_st {
132 long k1;
133 long k2;
134 long k3;
135 } X9_62_PENTANOMIAL;
136
137 typedef struct x9_62_characteristic_two_st {
138 long m;
139 ASN1_OBJECT *type;
140 union {
141 char *ptr;
142 /* NID_X9_62_onBasis */
143 ASN1_NULL *onBasis;
144 /* NID_X9_62_tpBasis */
145 ASN1_INTEGER *tpBasis;
146 /* NID_X9_62_ppBasis */
147 X9_62_PENTANOMIAL *ppBasis;
148 /* anything else */
149 ASN1_TYPE *other;
150 } p;
151 } X9_62_CHARACTERISTIC_TWO;
152
153 typedef struct x9_62_fieldid_st {
154 ASN1_OBJECT *fieldType;
155 union {
156 char *ptr;
157 /* NID_X9_62_prime_field */
158 ASN1_INTEGER *prime;
159 /* NID_X9_62_characteristic_two_field */
160 X9_62_CHARACTERISTIC_TWO *char_two;
161 /* anything else */
162 ASN1_TYPE *other;
163 } p;
164 } X9_62_FIELDID;
165
166 typedef struct x9_62_curve_st {
167 ASN1_OCTET_STRING *a;
168 ASN1_OCTET_STRING *b;
169 ASN1_BIT_STRING *seed;
170 } X9_62_CURVE;
171
172 typedef struct ec_parameters_st {
173 long version;
174 X9_62_FIELDID *fieldID;
175 X9_62_CURVE *curve;
176 ASN1_OCTET_STRING *base;
177 ASN1_INTEGER *order;
178 ASN1_INTEGER *cofactor;
179 } ECPARAMETERS;
180
181 struct ecpk_parameters_st {
182 int type;
183 union {
184 ASN1_OBJECT *named_curve;
185 ECPARAMETERS *parameters;
186 ASN1_NULL *implicitlyCA;
187 } value;
188 }/* ECPKPARAMETERS */;
189
190 /* SEC1 ECPrivateKey */
191 typedef struct ec_privatekey_st {
192 long version;
193 ASN1_OCTET_STRING *privateKey;
194 ECPKPARAMETERS *parameters;
195 ASN1_BIT_STRING *publicKey;
196 } EC_PRIVATEKEY;
197
198 /* the OpenSSL ASN.1 definitions */
199 ASN1_SEQUENCE(X9_62_PENTANOMIAL) = {
200 ASN1_SIMPLE(X9_62_PENTANOMIAL, k1, LONG),
201 ASN1_SIMPLE(X9_62_PENTANOMIAL, k2, LONG),
202 ASN1_SIMPLE(X9_62_PENTANOMIAL, k3, LONG)
203 } ASN1_SEQUENCE_END(X9_62_PENTANOMIAL)
204
205 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
206 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
207
208 ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY);
209
210 ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = {
211 ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)),
212 ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)),
213 ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL))
214 } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL);
215
216 ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = {
217 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, LONG),
218 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT),
219 ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO)
220 } ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO)
221
222 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
223 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
224
225 ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY);
226
227 ASN1_ADB(X9_62_FIELDID) = {
228 ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)),
229 ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO))
230 } ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL);
231
232 ASN1_SEQUENCE(X9_62_FIELDID) = {
233 ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
234 ASN1_ADB_OBJECT(X9_62_FIELDID)
235 } ASN1_SEQUENCE_END(X9_62_FIELDID)
236
237 ASN1_SEQUENCE(X9_62_CURVE) = {
238 ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING),
239 ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING),
240 ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING)
241 } ASN1_SEQUENCE_END(X9_62_CURVE)
242
243 ASN1_SEQUENCE(ECPARAMETERS) = {
244 ASN1_SIMPLE(ECPARAMETERS, version, LONG),
245 ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID),
246 ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE),
247 ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING),
248 ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER),
249 ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER)
250 } ASN1_SEQUENCE_END(ECPARAMETERS)
251
252 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
253 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
254
255 ASN1_CHOICE(ECPKPARAMETERS) = {
256 ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT),
257 ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS),
258 ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL)
259 } ASN1_CHOICE_END(ECPKPARAMETERS)
260
261 DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
262 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS)
263 IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
264
265 ASN1_SEQUENCE(EC_PRIVATEKEY) = {
266 ASN1_SIMPLE(EC_PRIVATEKEY, version, LONG),
267 ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING),
268 ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0),
269 ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1)
270 } ASN1_SEQUENCE_END(EC_PRIVATEKEY)
271
272 DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
273 DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY)
274 IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
275
276 /* some declarations of internal function */
277
278 /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */
279 static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *);
280 /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */
281 static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *);
282 /* ec_asn1_parameters2group() creates a EC_GROUP object from a
283 * ECPARAMETERS object */
284 static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *);
285 /* ec_asn1_group2parameters() creates a ECPARAMETERS object from a
286 * EC_GROUP object */
287 static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *,ECPARAMETERS *);
288 /* ec_asn1_pkparameters2group() creates a EC_GROUP object from a
289 * ECPKPARAMETERS object */
290 static EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *);
291 /* ec_asn1_group2pkparameters() creates a ECPKPARAMETERS object from a
292 * EC_GROUP object */
293 static ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *,
294 ECPKPARAMETERS *);
295
296
297 /* the function definitions */
298
299 static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field)
300 {
301 int ok=0, nid;
302 BIGNUM *tmp = NULL;
303
304 if (group == NULL || field == NULL)
305 return 0;
306
307 /* clear the old values (if necessary) */
308 if (field->fieldType != NULL)
309 ASN1_OBJECT_free(field->fieldType);
310 if (field->p.other != NULL)
311 ASN1_TYPE_free(field->p.other);
312
313 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
314 /* set OID for the field */
315 if ((field->fieldType = OBJ_nid2obj(nid)) == NULL)
316 {
317 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
318 goto err;
319 }
320
321 if (nid == NID_X9_62_prime_field)
322 {
323 if ((tmp = BN_new()) == NULL)
324 {
325 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
326 goto err;
327 }
328 /* the parameters are specified by the prime number p */
329 if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL))
330 {
331 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
332 goto err;
333 }
334 /* set the prime number */
335 field->p.prime = BN_to_ASN1_INTEGER(tmp,NULL);
336 if (field->p.prime == NULL)
337 {
338 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
339 goto err;
340 }
341 }
342 else /* nid == NID_X9_62_characteristic_two_field */
343 {
344 int field_type;
345 X9_62_CHARACTERISTIC_TWO *char_two;
346
347 field->p.char_two = X9_62_CHARACTERISTIC_TWO_new();
348 char_two = field->p.char_two;
349
350 if (char_two == NULL)
351 {
352 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
353 goto err;
354 }
355
356 char_two->m = (long)EC_GROUP_get_degree(group);
357
358 field_type = EC_GROUP_get_basis_type(group);
359
360 if (field_type == 0)
361 {
362 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
363 goto err;
364 }
365 /* set base type OID */
366 if ((char_two->type = OBJ_nid2obj(field_type)) == NULL)
367 {
368 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
369 goto err;
370 }
371
372 if (field_type == NID_X9_62_tpBasis)
373 {
374 unsigned int k;
375
376 if (!EC_GROUP_get_trinomial_basis(group, &k))
377 goto err;
378
379 char_two->p.tpBasis = ASN1_INTEGER_new();
380 if (!char_two->p.tpBasis)
381 {
382 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
383 goto err;
384 }
385 if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k))
386 {
387 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS,
388 ERR_R_ASN1_LIB);
389 goto err;
390 }
391 }
392 else if (field_type == NID_X9_62_ppBasis)
393 {
394 unsigned int k1, k2, k3;
395
396 if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3))
397 goto err;
398
399 char_two->p.ppBasis = X9_62_PENTANOMIAL_new();
400 if (!char_two->p.ppBasis)
401 {
402 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
403 goto err;
404 }
405
406 /* set k? values */
407 char_two->p.ppBasis->k1 = (long)k1;
408 char_two->p.ppBasis->k2 = (long)k2;
409 char_two->p.ppBasis->k3 = (long)k3;
410 }
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 {
417 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
418 goto err;
419 }
420 }
421 }
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 {
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 {
453 if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL))
454 {
455 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
456 goto err;
457 }
458 }
459 else /* nid == NID_X9_62_characteristic_two_field */
460 {
461 if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL))
462 {
463 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
464 goto err;
465 }
466 }
467
468 len_1 = (size_t)BN_num_bytes(tmp_1);
469 len_2 = (size_t)BN_num_bytes(tmp_2);
470
471 if (len_1 == 0)
472 {
473 /* len_1 == 0 => a == 0 */
474 a_buf = &char_zero;
475 len_1 = 1;
476 }
477 else
478 {
479 if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL)
480 {
481 ECerr(EC_F_EC_ASN1_GROUP2CURVE,
482 ERR_R_MALLOC_FAILURE);
483 goto err;
484 }
485 if ( (len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0)
486 {
487 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
488 goto err;
489 }
490 a_buf = buffer_1;
491 }
492
493 if (len_2 == 0)
494 {
495 /* len_2 == 0 => b == 0 */
496 b_buf = &char_zero;
497 len_2 = 1;
498 }
499 else
500 {
501 if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL)
502 {
503 ECerr(EC_F_EC_ASN1_GROUP2CURVE,
504 ERR_R_MALLOC_FAILURE);
505 goto err;
506 }
507 if ( (len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0)
508 {
509 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
510 goto err;
511 }
512 b_buf = buffer_2;
513 }
514
515 /* set a and b */
516 if (!M_ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) ||
517 !M_ASN1_OCTET_STRING_set(curve->b, b_buf, len_2))
518 {
519 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
520 goto err;
521 }
522
523 /* set the seed (optional) */
524 if (group->seed)
525 {
526 if (!curve->seed)
527 if ((curve->seed = ASN1_BIT_STRING_new()) == NULL)
528 {
529 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
530 goto err;
531 }
532 if (!ASN1_BIT_STRING_set(curve->seed, group->seed,
533 (int)group->seed_len))
534 {
535 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
536 goto err;
537 }
538 }
539 else
540 {
541 if (curve->seed)
542 {
543 ASN1_BIT_STRING_free(curve->seed);
544 curve->seed = NULL;
545 }
546 }
547
548 ok = 1;
549
550 err: if (buffer_1)
551 OPENSSL_free(buffer_1);
552 if (buffer_2)
553 OPENSSL_free(buffer_2);
554 if (tmp_1)
555 BN_free(tmp_1);
556 if (tmp_2)
557 BN_free(tmp_2);
558 return(ok);
559 }
560
561 static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group,
562 ECPARAMETERS *param)
563 {
564 int ok=0;
565 size_t len=0;
566 ECPARAMETERS *ret=NULL;
567 BIGNUM *tmp=NULL;
568 unsigned char *buffer=NULL;
569 const EC_POINT *point=NULL;
570 point_conversion_form_t form;
571
572 if ((tmp = BN_new()) == NULL)
573 {
574 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
575 goto err;
576 }
577
578 if (param == NULL)
579 {
580 if ((ret = ECPARAMETERS_new()) == NULL)
581 {
582 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS,
583 ERR_R_MALLOC_FAILURE);
584 goto err;
585 }
586 }
587 else
588 ret = param;
589
590 /* set the version (always one) */
591 ret->version = (long)0x1;
592
593 /* set the fieldID */
594 if (!ec_asn1_group2fieldid(group, ret->fieldID))
595 {
596 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
597 goto err;
598 }
599
600 /* set the curve */
601 if (!ec_asn1_group2curve(group, ret->curve))
602 {
603 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
604 goto err;
605 }
606
607 /* set the base point */
608 if ((point = EC_GROUP_get0_generator(group)) == NULL)
609 {
610 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, EC_R_UNDEFINED_GENERATOR);
611 goto err;
612 }
613
614 form = EC_GROUP_get_point_conversion_form(group);
615
616 len = EC_POINT_point2oct(group, point, form, NULL, len, NULL);
617 if (len == 0)
618 {
619 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
620 goto err;
621 }
622 if ((buffer = OPENSSL_malloc(len)) == NULL)
623 {
624 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
625 goto err;
626 }
627 if (!EC_POINT_point2oct(group, point, form, buffer, len, NULL))
628 {
629 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
630 goto err;
631 }
632 if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL)
633 {
634 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
635 goto err;
636 }
637 if (!ASN1_OCTET_STRING_set(ret->base, buffer, len))
638 {
639 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
640 goto err;
641 }
642
643 /* set the order */
644 if (!EC_GROUP_get_order(group, tmp, NULL))
645 {
646 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
647 goto err;
648 }
649 ret->order = BN_to_ASN1_INTEGER(tmp, ret->order);
650 if (ret->order == NULL)
651 {
652 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
653 goto err;
654 }
655
656 /* set the cofactor (optional) */
657 if (EC_GROUP_get_cofactor(group, tmp, NULL))
658 {
659 ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor);
660 if (ret->cofactor == NULL)
661 {
662 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
663 goto err;
664 }
665 }
666
667 ok = 1;
668
669 err : if(!ok)
670 {
671 if (ret && !param)
672 ECPARAMETERS_free(ret);
673 ret = NULL;
674 }
675 if (tmp)
676 BN_free(tmp);
677 if (buffer)
678 OPENSSL_free(buffer);
679 return(ret);
680 }
681
682 ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *group,
683 ECPKPARAMETERS *params)
684 {
685 int ok = 1, tmp;
686 ECPKPARAMETERS *ret = params;
687
688 if (ret == NULL)
689 {
690 if ((ret = ECPKPARAMETERS_new()) == NULL)
691 {
692 ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS,
693 ERR_R_MALLOC_FAILURE);
694 return NULL;
695 }
696 }
697 else
698 {
699 if (ret->type == 0 && ret->value.named_curve)
700 ASN1_OBJECT_free(ret->value.named_curve);
701 else if (ret->type == 1 && ret->value.parameters)
702 ECPARAMETERS_free(ret->value.parameters);
703 }
704
705 if (EC_GROUP_get_asn1_flag(group))
706 {
707 /* use the asn1 OID to describe the
708 * the elliptic curve parameters
709 */
710 tmp = EC_GROUP_get_nid(group);
711 if (tmp)
712 {
713 ret->type = 0;
714 if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
715 ok = 0;
716 }
717 else
718 /* we don't kmow the nid => ERROR */
719 ok = 0;
720 }
721 else
722 {
723 /* use the ECPARAMETERS structure */
724 ret->type = 1;
725 if ((ret->value.parameters = ec_asn1_group2parameters(
726 group, NULL)) == NULL)
727 ok = 0;
728 }
729
730 if (!ok)
731 {
732 ECPKPARAMETERS_free(ret);
733 return NULL;
734 }
735 return ret;
736 }
737
738 static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *params)
739 {
740 int ok = 0, tmp;
741 EC_GROUP *ret = NULL;
742 BIGNUM *p = NULL, *a = NULL, *b = NULL;
743 EC_POINT *point=NULL;
744
745 if (!params->fieldID || !params->fieldID->fieldType ||
746 !params->fieldID->p.ptr)
747 {
748 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
749 goto err;
750 }
751
752 /* now extract the curve parameters a and b */
753 if (!params->curve || !params->curve->a ||
754 !params->curve->a->data || !params->curve->b ||
755 !params->curve->b->data)
756 {
757 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
758 goto err;
759 }
760 a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL);
761 if (a == NULL)
762 {
763 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
764 goto err;
765 }
766 b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL);
767 if (b == NULL)
768 {
769 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
770 goto err;
771 }
772
773 /* get the field parameters */
774 tmp = OBJ_obj2nid(params->fieldID->fieldType);
775
776 if (tmp == NID_X9_62_characteristic_two_field)
777 {
778 X9_62_CHARACTERISTIC_TWO *char_two;
779
780 char_two = params->fieldID->p.char_two;
781
782 if ((p = BN_new()) == NULL)
783 {
784 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE);
785 goto err;
786 }
787
788 /* get the base type */
789 tmp = OBJ_obj2nid(char_two->type);
790
791 if (tmp == NID_X9_62_tpBasis)
792 {
793 long tmp_long;
794
795 if (!char_two->p.tpBasis)
796 {
797 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
798 goto err;
799 }
800
801 tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis);
802 /* create the polynomial */
803 if (!BN_set_bit(p, (int)char_two->m))
804 goto err;
805 if (!BN_set_bit(p, (int)tmp_long))
806 goto err;
807 if (!BN_set_bit(p, 0))
808 goto err;
809 }
810 else if (tmp == NID_X9_62_ppBasis)
811 {
812 X9_62_PENTANOMIAL *penta;
813
814 penta = char_two->p.ppBasis;
815 if (!penta)
816 {
817 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
818 goto err;
819 }
820 /* create the polynomial */
821 if (!BN_set_bit(p, (int)char_two->m)) goto err;
822 if (!BN_set_bit(p, (int)penta->k1)) goto err;
823 if (!BN_set_bit(p, (int)penta->k2)) goto err;
824 if (!BN_set_bit(p, (int)penta->k3)) goto err;
825 if (!BN_set_bit(p, 0)) goto err;
826 }
827 else if (tmp == NID_X9_62_onBasis)
828 {
829 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_NOT_IMPLEMENTED);
830 goto err;
831 }
832 else /* error */
833 {
834 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
835 goto err;
836 }
837
838 /* create the EC_GROUP structure */
839 ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL);
840 if (ret == NULL)
841 {
842 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
843 goto err;
844 }
845 }
846 else if (tmp == NID_X9_62_prime_field)
847 {
848 /* we have a curve over a prime field */
849 /* extract the prime number */
850 if (!params->fieldID->p.prime)
851 {
852 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
853 goto err;
854 }
855 p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL);
856 if (p == NULL)
857 {
858 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
859 goto err;
860 }
861 /* create the EC_GROUP structure */
862 ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
863 if (ret == NULL)
864 {
865 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
866 goto err;
867 }
868 }
869
870 /* extract seed (optional) */
871 if (params->curve->seed != NULL)
872 {
873 if (ret->seed != NULL)
874 OPENSSL_free(ret->seed);
875 if (!(ret->seed = OPENSSL_malloc(params->curve->seed->length)))
876 {
877 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
878 ERR_R_MALLOC_FAILURE);
879 goto err;
880 }
881 memcpy(ret->seed, params->curve->seed->data,
882 params->curve->seed->length);
883 ret->seed_len = params->curve->seed->length;
884 }
885
886 if (!params->order || !params->base || !params->base->data)
887 {
888 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
889 goto err;
890 }
891
892 if ((point = EC_POINT_new(ret)) == NULL) goto err;
893
894 /* set the point conversion form */
895 EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t)
896 (params->base->data[0] & ~0x01));
897
898 /* extract the ec point */
899 if (!EC_POINT_oct2point(ret, point, params->base->data,
900 params->base->length, NULL))
901 {
902 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
903 goto err;
904 }
905
906 /* extract the order */
907 if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL)
908 {
909 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
910 goto err;
911 }
912
913 /* extract the cofactor (optional) */
914 if (params->cofactor == NULL)
915 {
916 if (b)
917 {
918 BN_free(b);
919 b = NULL;
920 }
921 }
922 else
923 if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL)
924 {
925 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
926 goto err;
927 }
928 /* set the generator, order and cofactor (if present) */
929 if (!EC_GROUP_set_generator(ret, point, a, b))
930 {
931 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
932 goto err;
933 }
934
935 ok = 1;
936
937 err: if (!ok)
938 {
939 if (ret)
940 EC_GROUP_clear_free(ret);
941 ret = NULL;
942 }
943
944 if (p)
945 BN_free(p);
946 if (a)
947 BN_free(a);
948 if (b)
949 BN_free(b);
950 if (point)
951 EC_POINT_free(point);
952 return(ret);
953 }
954
955 EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *params)
956 {
957 EC_GROUP *ret=NULL;
958 int tmp=0;
959
960 if (params == NULL)
961 {
962 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP,
963 EC_R_MISSING_PARAMETERS);
964 return NULL;
965 }
966
967 if (params->type == 0)
968 { /* the curve is given by an OID */
969 tmp = OBJ_obj2nid(params->value.named_curve);
970 if ((ret = EC_GROUP_new_by_nid(tmp)) == NULL)
971 {
972 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP,
973 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
974 return NULL;
975 }
976 EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE);
977 }
978 else if (params->type == 1)
979 { /* the parameters are given by a ECPARAMETERS
980 * structure */
981 ret = ec_asn1_parameters2group(params->value.parameters);
982 if (!ret)
983 {
984 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, ERR_R_EC_LIB);
985 return NULL;
986 }
987 EC_GROUP_set_asn1_flag(ret, 0x0);
988 }
989 else if (params->type == 2)
990 { /* implicitlyCA */
991 return NULL;
992 }
993 else
994 {
995 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
996 return NULL;
997 }
998
999 return ret;
1000 }
1001
1002 /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
1003
1004 EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len)
1005 {
1006 EC_GROUP *group = NULL;
1007 ECPKPARAMETERS *params = NULL;
1008
1009 if ((params = d2i_ECPKPARAMETERS(NULL, in, len)) == NULL)
1010 {
1011 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
1012 ECPKPARAMETERS_free(params);
1013 return NULL;
1014 }
1015
1016 if ((group = ec_asn1_pkparameters2group(params)) == NULL)
1017 {
1018 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
1019 return NULL;
1020 }
1021
1022
1023 if (a && *a)
1024 EC_GROUP_clear_free(*a);
1025 if (a)
1026 *a = group;
1027
1028 ECPKPARAMETERS_free(params);
1029 return(group);
1030 }
1031
1032 int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out)
1033 {
1034 int ret=0;
1035 ECPKPARAMETERS *tmp = ec_asn1_group2pkparameters(a, NULL);
1036 if (tmp == NULL)
1037 {
1038 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE);
1039 return 0;
1040 }
1041 if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0)
1042 {
1043 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE);
1044 ECPKPARAMETERS_free(tmp);
1045 return 0;
1046 }
1047 ECPKPARAMETERS_free(tmp);
1048 return(ret);
1049 }
1050
1051 /* some EC_KEY functions */
1052
1053 EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len)
1054 {
1055 int ok=0;
1056 EC_KEY *ret=NULL;
1057 EC_PRIVATEKEY *priv_key=NULL;
1058
1059 if ((priv_key = EC_PRIVATEKEY_new()) == NULL)
1060 {
1061 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1062 return NULL;
1063 }
1064
1065 if ((priv_key = d2i_EC_PRIVATEKEY(&priv_key, in, len)) == NULL)
1066 {
1067 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1068 EC_PRIVATEKEY_free(priv_key);
1069 return NULL;
1070 }
1071
1072 if (a == NULL || *a == NULL)
1073 {
1074 if ((ret = EC_KEY_new()) == NULL)
1075 {
1076 ECerr(EC_F_D2I_ECPRIVATEKEY,
1077 ERR_R_MALLOC_FAILURE);
1078 goto err;
1079 }
1080 if (a)
1081 *a = ret;
1082 }
1083 else
1084 ret = *a;
1085
1086 if (priv_key->parameters)
1087 {
1088 if (ret->group)
1089 EC_GROUP_clear_free(ret->group);
1090 ret->group = ec_asn1_pkparameters2group(priv_key->parameters);
1091 }
1092
1093 if (ret->group == NULL)
1094 {
1095 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1096 goto err;
1097 }
1098
1099 ret->version = priv_key->version;
1100
1101 if (priv_key->privateKey)
1102 {
1103 ret->priv_key = BN_bin2bn(
1104 M_ASN1_STRING_data(priv_key->privateKey),
1105 M_ASN1_STRING_length(priv_key->privateKey),
1106 ret->priv_key);
1107 if (ret->priv_key == NULL)
1108 {
1109 ECerr(EC_F_D2I_ECPRIVATEKEY,
1110 ERR_R_BN_LIB);
1111 goto err;
1112 }
1113 }
1114 else
1115 {
1116 ECerr(EC_F_D2I_ECPRIVATEKEY,
1117 EC_R_MISSING_PRIVATE_KEY);
1118 goto err;
1119 }
1120
1121 if (priv_key->publicKey)
1122 {
1123 const unsigned char *pub_oct;
1124 size_t pub_oct_len;
1125
1126 if (ret->pub_key)
1127 EC_POINT_clear_free(ret->pub_key);
1128 ret->pub_key = EC_POINT_new(ret->group);
1129 if (ret->pub_key == NULL)
1130 {
1131 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1132 goto err;
1133 }
1134 pub_oct = M_ASN1_STRING_data(priv_key->publicKey);
1135 pub_oct_len = M_ASN1_STRING_length(priv_key->publicKey);
1136 /* save the point conversion form */
1137 ret->conv_form = (point_conversion_form_t)(pub_oct[0] & ~0x01);
1138 if (!EC_POINT_oct2point(ret->group, ret->pub_key,
1139 pub_oct, pub_oct_len, NULL))
1140 {
1141 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1142 goto err;
1143 }
1144 }
1145
1146 ok = 1;
1147 err:
1148 if (!ok)
1149 {
1150 if (ret)
1151 EC_KEY_free(ret);
1152 ret = NULL;
1153 }
1154
1155 if (priv_key)
1156 EC_PRIVATEKEY_free(priv_key);
1157
1158 return(ret);
1159 }
1160
1161 int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out)
1162 {
1163 int ret=0, ok=0;
1164 unsigned char *buffer=NULL;
1165 size_t buf_len=0, tmp_len;
1166 EC_PRIVATEKEY *priv_key=NULL;
1167
1168 if (a == NULL || a->group == NULL || a->priv_key == NULL)
1169 {
1170 ECerr(EC_F_I2D_ECPRIVATEKEY,
1171 ERR_R_PASSED_NULL_PARAMETER);
1172 goto err;
1173 }
1174
1175 if ((priv_key = EC_PRIVATEKEY_new()) == NULL)
1176 {
1177 ECerr(EC_F_I2D_ECPRIVATEKEY,
1178 ERR_R_MALLOC_FAILURE);
1179 goto err;
1180 }
1181
1182 priv_key->version = a->version;
1183
1184 buf_len = (size_t)BN_num_bytes(a->priv_key);
1185 buffer = OPENSSL_malloc(buf_len);
1186 if (buffer == NULL)
1187 {
1188 ECerr(EC_F_I2D_ECPRIVATEKEY,
1189 ERR_R_MALLOC_FAILURE);
1190 goto err;
1191 }
1192
1193 if (!BN_bn2bin(a->priv_key, buffer))
1194 {
1195 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_BN_LIB);
1196 goto err;
1197 }
1198
1199 if (!M_ASN1_OCTET_STRING_set(priv_key->privateKey, buffer, buf_len))
1200 {
1201 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
1202 goto err;
1203 }
1204
1205 if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS))
1206 {
1207 if ((priv_key->parameters = ec_asn1_group2pkparameters(
1208 a->group, priv_key->parameters)) == NULL)
1209 {
1210 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1211 goto err;
1212 }
1213 }
1214
1215 if (!(a->enc_flag & EC_PKEY_NO_PUBKEY))
1216 {
1217 priv_key->publicKey = M_ASN1_BIT_STRING_new();
1218 if (priv_key->publicKey == NULL)
1219 {
1220 ECerr(EC_F_I2D_ECPRIVATEKEY,
1221 ERR_R_MALLOC_FAILURE);
1222 goto err;
1223 }
1224
1225 tmp_len = EC_POINT_point2oct(a->group, a->pub_key,
1226 a->conv_form, NULL, 0, NULL);
1227
1228 if (tmp_len > buf_len)
1229 buffer = OPENSSL_realloc(buffer, tmp_len);
1230 if (buffer == NULL)
1231 {
1232 ECerr(EC_F_I2D_ECPRIVATEKEY,
1233 ERR_R_MALLOC_FAILURE);
1234 goto err;
1235 }
1236
1237 buf_len = tmp_len;
1238
1239 if (!EC_POINT_point2oct(a->group, a->pub_key,
1240 a->conv_form, buffer, buf_len, NULL))
1241 {
1242 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1243 goto err;
1244 }
1245
1246 if (!M_ASN1_BIT_STRING_set(priv_key->publicKey, buffer,
1247 buf_len))
1248 {
1249 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
1250 goto err;
1251 }
1252 }
1253
1254 if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0)
1255 {
1256 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1257 goto err;
1258 }
1259 ok=1;
1260 err:
1261 if (buffer)
1262 OPENSSL_free(buffer);
1263 if (priv_key)
1264 EC_PRIVATEKEY_free(priv_key);
1265 return(ok?ret:0);
1266 }
1267
1268 int i2d_ECParameters(EC_KEY *a, unsigned char **out)
1269 {
1270 if (a == NULL)
1271 {
1272 ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1273 return 0;
1274 }
1275 return i2d_ECPKParameters(a->group, out);
1276 }
1277
1278 EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len)
1279 {
1280 EC_KEY *ret;
1281
1282 if (in == NULL || *in == NULL)
1283 {
1284 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1285 return NULL;
1286 }
1287
1288 if (a == NULL || *a == NULL)
1289 {
1290 if ((ret = EC_KEY_new()) == NULL)
1291 {
1292 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
1293 return NULL;
1294 }
1295 if (a)
1296 *a = ret;
1297 }
1298 else
1299 ret = *a;
1300
1301 if (!d2i_ECPKParameters(&ret->group, in, len))
1302 {
1303 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
1304 return NULL;
1305 }
1306
1307 return ret;
1308 }
1309
1310 EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len)
1311 {
1312 EC_KEY *ret=NULL;
1313
1314 if (a == NULL || (*a) == NULL || (*a)->group == NULL)
1315 {
1316 /* sorry, but a EC_GROUP-structur is necessary
1317 * to set the public key */
1318 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1319 return 0;
1320 }
1321 ret = *a;
1322 if (ret->pub_key == NULL &&
1323 (ret->pub_key = EC_POINT_new(ret->group)) == NULL)
1324 {
1325 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
1326 return 0;
1327 }
1328 if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL))
1329 {
1330 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB);
1331 return 0;
1332 }
1333 /* save the point conversion form */
1334 ret->conv_form = (point_conversion_form_t)(*in[0] & ~0x01);
1335 *in += len;
1336 return ret;
1337 }
1338
1339 int i2o_ECPublicKey(EC_KEY *a, unsigned char **out)
1340 {
1341 size_t buf_len=0;
1342 int new_buffer = 0;
1343
1344 if (a == NULL)
1345 {
1346 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1347 return 0;
1348 }
1349
1350 buf_len = EC_POINT_point2oct(a->group, a->pub_key,
1351 a->conv_form, NULL, 0, NULL);
1352
1353 if (out == NULL || buf_len == 0)
1354 /* out == NULL => just return the length of the octet string */
1355 return buf_len;
1356
1357 if (*out == NULL)
1358 {
1359 if ((*out = OPENSSL_malloc(buf_len)) == NULL)
1360 {
1361 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
1362 return 0;
1363 }
1364 new_buffer = 1;
1365 }
1366 if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form,
1367 *out, buf_len, NULL))
1368 {
1369 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB);
1370 OPENSSL_free(*out);
1371 *out = NULL;
1372 return 0;
1373 }
1374 if (!new_buffer)
1375 *out += buf_len;
1376 return buf_len;
1377 }
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