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path: root/src/lib/libcrypto/ec/ec_asn1.c
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diff --git a/src/lib/libcrypto/ec/ec_asn1.c b/src/lib/libcrypto/ec/ec_asn1.c
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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
66int 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
87int 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
105int 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 */
131typedef struct x9_62_pentanomial_st {
132 long k1;
133 long k2;
134 long k3;
135 } X9_62_PENTANOMIAL;
136
137typedef 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
153typedef 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
166typedef 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
172typedef 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
181struct 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 */
191typedef 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 */
199ASN1_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
205DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
206IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
207
208ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY);
209
210ASN1_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
216ASN1_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
222DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
223IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
224
225ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY);
226
227ASN1_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
232ASN1_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
237ASN1_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
243ASN1_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
252DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
253IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
254
255ASN1_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
261DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
262DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS)
263IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
264
265ASN1_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
272DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
273DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY)
274IMPLEMENT_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 */
279static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *);
280/* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */
281static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *);
282/* ec_asn1_parameters2group() creates a EC_GROUP object from a
283 * ECPARAMETERS object */
284static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *);
285/* ec_asn1_group2parameters() creates a ECPARAMETERS object from a
286 * EC_GROUP object */
287static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *,ECPARAMETERS *);
288/* ec_asn1_pkparameters2group() creates a EC_GROUP object from a
289 * ECPKPARAMETERS object */
290static EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *);
291/* ec_asn1_group2pkparameters() creates a ECPKPARAMETERS object from a
292 * EC_GROUP object */
293static ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *,
294 ECPKPARAMETERS *);
295
296
297/* the function definitions */
298
299static 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_GROUP2FIELDID,
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
425err : if (tmp)
426 BN_free(tmp);
427 return(ok);
428}
429
430static 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 curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
533 curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT;
534 if (!ASN1_BIT_STRING_set(curve->seed, group->seed,
535 (int)group->seed_len))
536 {
537 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
538 goto err;
539 }
540 }
541 else
542 {
543 if (curve->seed)
544 {
545 ASN1_BIT_STRING_free(curve->seed);
546 curve->seed = NULL;
547 }
548 }
549
550 ok = 1;
551
552err: if (buffer_1)
553 OPENSSL_free(buffer_1);
554 if (buffer_2)
555 OPENSSL_free(buffer_2);
556 if (tmp_1)
557 BN_free(tmp_1);
558 if (tmp_2)
559 BN_free(tmp_2);
560 return(ok);
561 }
562
563static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group,
564 ECPARAMETERS *param)
565 {
566 int ok=0;
567 size_t len=0;
568 ECPARAMETERS *ret=NULL;
569 BIGNUM *tmp=NULL;
570 unsigned char *buffer=NULL;
571 const EC_POINT *point=NULL;
572 point_conversion_form_t form;
573
574 if ((tmp = BN_new()) == NULL)
575 {
576 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
577 goto err;
578 }
579
580 if (param == NULL)
581 {
582 if ((ret = ECPARAMETERS_new()) == NULL)
583 {
584 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS,
585 ERR_R_MALLOC_FAILURE);
586 goto err;
587 }
588 }
589 else
590 ret = param;
591
592 /* set the version (always one) */
593 ret->version = (long)0x1;
594
595 /* set the fieldID */
596 if (!ec_asn1_group2fieldid(group, ret->fieldID))
597 {
598 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
599 goto err;
600 }
601
602 /* set the curve */
603 if (!ec_asn1_group2curve(group, ret->curve))
604 {
605 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
606 goto err;
607 }
608
609 /* set the base point */
610 if ((point = EC_GROUP_get0_generator(group)) == NULL)
611 {
612 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, EC_R_UNDEFINED_GENERATOR);
613 goto err;
614 }
615
616 form = EC_GROUP_get_point_conversion_form(group);
617
618 len = EC_POINT_point2oct(group, point, form, NULL, len, NULL);
619 if (len == 0)
620 {
621 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
622 goto err;
623 }
624 if ((buffer = OPENSSL_malloc(len)) == NULL)
625 {
626 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
627 goto err;
628 }
629 if (!EC_POINT_point2oct(group, point, form, buffer, len, NULL))
630 {
631 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
632 goto err;
633 }
634 if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL)
635 {
636 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
637 goto err;
638 }
639 if (!ASN1_OCTET_STRING_set(ret->base, buffer, len))
640 {
641 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
642 goto err;
643 }
644
645 /* set the order */
646 if (!EC_GROUP_get_order(group, tmp, NULL))
647 {
648 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
649 goto err;
650 }
651 ret->order = BN_to_ASN1_INTEGER(tmp, ret->order);
652 if (ret->order == NULL)
653 {
654 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
655 goto err;
656 }
657
658 /* set the cofactor (optional) */
659 if (EC_GROUP_get_cofactor(group, tmp, NULL))
660 {
661 ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor);
662 if (ret->cofactor == NULL)
663 {
664 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
665 goto err;
666 }
667 }
668
669 ok = 1;
670
671err : if(!ok)
672 {
673 if (ret && !param)
674 ECPARAMETERS_free(ret);
675 ret = NULL;
676 }
677 if (tmp)
678 BN_free(tmp);
679 if (buffer)
680 OPENSSL_free(buffer);
681 return(ret);
682 }
683
684ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *group,
685 ECPKPARAMETERS *params)
686 {
687 int ok = 1, tmp;
688 ECPKPARAMETERS *ret = params;
689
690 if (ret == NULL)
691 {
692 if ((ret = ECPKPARAMETERS_new()) == NULL)
693 {
694 ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS,
695 ERR_R_MALLOC_FAILURE);
696 return NULL;
697 }
698 }
699 else
700 {
701 if (ret->type == 0 && ret->value.named_curve)
702 ASN1_OBJECT_free(ret->value.named_curve);
703 else if (ret->type == 1 && ret->value.parameters)
704 ECPARAMETERS_free(ret->value.parameters);
705 }
706
707 if (EC_GROUP_get_asn1_flag(group))
708 {
709 /* use the asn1 OID to describe the
710 * the elliptic curve parameters
711 */
712 tmp = EC_GROUP_get_curve_name(group);
713 if (tmp)
714 {
715 ret->type = 0;
716 if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
717 ok = 0;
718 }
719 else
720 /* we don't kmow the nid => ERROR */
721 ok = 0;
722 }
723 else
724 {
725 /* use the ECPARAMETERS structure */
726 ret->type = 1;
727 if ((ret->value.parameters = ec_asn1_group2parameters(
728 group, NULL)) == NULL)
729 ok = 0;
730 }
731
732 if (!ok)
733 {
734 ECPKPARAMETERS_free(ret);
735 return NULL;
736 }
737 return ret;
738 }
739
740static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *params)
741 {
742 int ok = 0, tmp;
743 EC_GROUP *ret = NULL;
744 BIGNUM *p = NULL, *a = NULL, *b = NULL;
745 EC_POINT *point=NULL;
746 long field_bits;
747
748 if (!params->fieldID || !params->fieldID->fieldType ||
749 !params->fieldID->p.ptr)
750 {
751 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
752 goto err;
753 }
754
755 /* now extract the curve parameters a and b */
756 if (!params->curve || !params->curve->a ||
757 !params->curve->a->data || !params->curve->b ||
758 !params->curve->b->data)
759 {
760 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
761 goto err;
762 }
763 a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL);
764 if (a == NULL)
765 {
766 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
767 goto err;
768 }
769 b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL);
770 if (b == NULL)
771 {
772 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
773 goto err;
774 }
775
776 /* get the field parameters */
777 tmp = OBJ_obj2nid(params->fieldID->fieldType);
778
779 if (tmp == NID_X9_62_characteristic_two_field)
780 {
781 X9_62_CHARACTERISTIC_TWO *char_two;
782
783 char_two = params->fieldID->p.char_two;
784
785 field_bits = char_two->m;
786 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS)
787 {
788 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE);
789 goto err;
790 }
791
792 if ((p = BN_new()) == NULL)
793 {
794 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE);
795 goto err;
796 }
797
798 /* get the base type */
799 tmp = OBJ_obj2nid(char_two->type);
800
801 if (tmp == NID_X9_62_tpBasis)
802 {
803 long tmp_long;
804
805 if (!char_two->p.tpBasis)
806 {
807 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
808 goto err;
809 }
810
811 tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis);
812
813 if (!(char_two->m > tmp_long && tmp_long > 0))
814 {
815 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_TRINOMIAL_BASIS);
816 goto err;
817 }
818
819 /* create the polynomial */
820 if (!BN_set_bit(p, (int)char_two->m))
821 goto err;
822 if (!BN_set_bit(p, (int)tmp_long))
823 goto err;
824 if (!BN_set_bit(p, 0))
825 goto err;
826 }
827 else if (tmp == NID_X9_62_ppBasis)
828 {
829 X9_62_PENTANOMIAL *penta;
830
831 penta = char_two->p.ppBasis;
832 if (!penta)
833 {
834 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
835 goto err;
836 }
837
838 if (!(char_two->m > penta->k3 && penta->k3 > penta->k2 && penta->k2 > penta->k1 && penta->k1 > 0))
839 {
840 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_PENTANOMIAL_BASIS);
841 goto err;
842 }
843
844 /* create the polynomial */
845 if (!BN_set_bit(p, (int)char_two->m)) goto err;
846 if (!BN_set_bit(p, (int)penta->k1)) goto err;
847 if (!BN_set_bit(p, (int)penta->k2)) goto err;
848 if (!BN_set_bit(p, (int)penta->k3)) goto err;
849 if (!BN_set_bit(p, 0)) goto err;
850 }
851 else if (tmp == NID_X9_62_onBasis)
852 {
853 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_NOT_IMPLEMENTED);
854 goto err;
855 }
856 else /* error */
857 {
858 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
859 goto err;
860 }
861
862 /* create the EC_GROUP structure */
863 ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL);
864 }
865 else if (tmp == NID_X9_62_prime_field)
866 {
867 /* we have a curve over a prime field */
868 /* extract the prime number */
869 if (!params->fieldID->p.prime)
870 {
871 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
872 goto err;
873 }
874 p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL);
875 if (p == NULL)
876 {
877 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
878 goto err;
879 }
880
881 if (BN_is_negative(p) || BN_is_zero(p))
882 {
883 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD);
884 goto err;
885 }
886
887 field_bits = BN_num_bits(p);
888 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS)
889 {
890 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE);
891 goto err;
892 }
893
894 /* create the EC_GROUP structure */
895 ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
896 }
897 else
898 {
899 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD);
900 goto err;
901 }
902
903 if (ret == NULL)
904 {
905 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
906 goto err;
907 }
908
909 /* extract seed (optional) */
910 if (params->curve->seed != NULL)
911 {
912 if (ret->seed != NULL)
913 OPENSSL_free(ret->seed);
914 if (!(ret->seed = OPENSSL_malloc(params->curve->seed->length)))
915 {
916 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
917 ERR_R_MALLOC_FAILURE);
918 goto err;
919 }
920 memcpy(ret->seed, params->curve->seed->data,
921 params->curve->seed->length);
922 ret->seed_len = params->curve->seed->length;
923 }
924
925 if (!params->order || !params->base || !params->base->data)
926 {
927 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
928 goto err;
929 }
930
931 if ((point = EC_POINT_new(ret)) == NULL) goto err;
932
933 /* set the point conversion form */
934 EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t)
935 (params->base->data[0] & ~0x01));
936
937 /* extract the ec point */
938 if (!EC_POINT_oct2point(ret, point, params->base->data,
939 params->base->length, NULL))
940 {
941 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
942 goto err;
943 }
944
945 /* extract the order */
946 if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL)
947 {
948 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
949 goto err;
950 }
951 if (BN_is_negative(a) || BN_is_zero(a))
952 {
953 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER);
954 goto err;
955 }
956 if (BN_num_bits(a) > (int)field_bits + 1) /* Hasse bound */
957 {
958 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER);
959 goto err;
960 }
961
962 /* extract the cofactor (optional) */
963 if (params->cofactor == NULL)
964 {
965 if (b)
966 {
967 BN_free(b);
968 b = NULL;
969 }
970 }
971 else
972 if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL)
973 {
974 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
975 goto err;
976 }
977 /* set the generator, order and cofactor (if present) */
978 if (!EC_GROUP_set_generator(ret, point, a, b))
979 {
980 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
981 goto err;
982 }
983
984 ok = 1;
985
986err: if (!ok)
987 {
988 if (ret)
989 EC_GROUP_clear_free(ret);
990 ret = NULL;
991 }
992
993 if (p)
994 BN_free(p);
995 if (a)
996 BN_free(a);
997 if (b)
998 BN_free(b);
999 if (point)
1000 EC_POINT_free(point);
1001 return(ret);
1002}
1003
1004EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *params)
1005 {
1006 EC_GROUP *ret=NULL;
1007 int tmp=0;
1008
1009 if (params == NULL)
1010 {
1011 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP,
1012 EC_R_MISSING_PARAMETERS);
1013 return NULL;
1014 }
1015
1016 if (params->type == 0)
1017 { /* the curve is given by an OID */
1018 tmp = OBJ_obj2nid(params->value.named_curve);
1019 if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL)
1020 {
1021 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP,
1022 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
1023 return NULL;
1024 }
1025 EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE);
1026 }
1027 else if (params->type == 1)
1028 { /* the parameters are given by a ECPARAMETERS
1029 * structure */
1030 ret = ec_asn1_parameters2group(params->value.parameters);
1031 if (!ret)
1032 {
1033 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, ERR_R_EC_LIB);
1034 return NULL;
1035 }
1036 EC_GROUP_set_asn1_flag(ret, 0x0);
1037 }
1038 else if (params->type == 2)
1039 { /* implicitlyCA */
1040 return NULL;
1041 }
1042 else
1043 {
1044 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_ASN1_ERROR);
1045 return NULL;
1046 }
1047
1048 return ret;
1049 }
1050
1051/* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
1052
1053EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len)
1054 {
1055 EC_GROUP *group = NULL;
1056 ECPKPARAMETERS *params = NULL;
1057
1058 if ((params = d2i_ECPKPARAMETERS(NULL, in, len)) == NULL)
1059 {
1060 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
1061 ECPKPARAMETERS_free(params);
1062 return NULL;
1063 }
1064
1065 if ((group = ec_asn1_pkparameters2group(params)) == NULL)
1066 {
1067 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
1068 return NULL;
1069 }
1070
1071
1072 if (a && *a)
1073 EC_GROUP_clear_free(*a);
1074 if (a)
1075 *a = group;
1076
1077 ECPKPARAMETERS_free(params);
1078 return(group);
1079 }
1080
1081int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out)
1082 {
1083 int ret=0;
1084 ECPKPARAMETERS *tmp = ec_asn1_group2pkparameters(a, NULL);
1085 if (tmp == NULL)
1086 {
1087 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE);
1088 return 0;
1089 }
1090 if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0)
1091 {
1092 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE);
1093 ECPKPARAMETERS_free(tmp);
1094 return 0;
1095 }
1096 ECPKPARAMETERS_free(tmp);
1097 return(ret);
1098 }
1099
1100/* some EC_KEY functions */
1101
1102EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len)
1103 {
1104 int ok=0;
1105 EC_KEY *ret=NULL;
1106 EC_PRIVATEKEY *priv_key=NULL;
1107
1108 if ((priv_key = EC_PRIVATEKEY_new()) == NULL)
1109 {
1110 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1111 return NULL;
1112 }
1113
1114 if ((priv_key = d2i_EC_PRIVATEKEY(&priv_key, in, len)) == NULL)
1115 {
1116 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1117 EC_PRIVATEKEY_free(priv_key);
1118 return NULL;
1119 }
1120
1121 if (a == NULL || *a == NULL)
1122 {
1123 if ((ret = EC_KEY_new()) == NULL)
1124 {
1125 ECerr(EC_F_D2I_ECPRIVATEKEY,
1126 ERR_R_MALLOC_FAILURE);
1127 goto err;
1128 }
1129 if (a)
1130 *a = ret;
1131 }
1132 else
1133 ret = *a;
1134
1135 if (priv_key->parameters)
1136 {
1137 if (ret->group)
1138 EC_GROUP_clear_free(ret->group);
1139 ret->group = ec_asn1_pkparameters2group(priv_key->parameters);
1140 }
1141
1142 if (ret->group == NULL)
1143 {
1144 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1145 goto err;
1146 }
1147
1148 ret->version = priv_key->version;
1149
1150 if (priv_key->privateKey)
1151 {
1152 ret->priv_key = BN_bin2bn(
1153 M_ASN1_STRING_data(priv_key->privateKey),
1154 M_ASN1_STRING_length(priv_key->privateKey),
1155 ret->priv_key);
1156 if (ret->priv_key == NULL)
1157 {
1158 ECerr(EC_F_D2I_ECPRIVATEKEY,
1159 ERR_R_BN_LIB);
1160 goto err;
1161 }
1162 }
1163 else
1164 {
1165 ECerr(EC_F_D2I_ECPRIVATEKEY,
1166 EC_R_MISSING_PRIVATE_KEY);
1167 goto err;
1168 }
1169
1170 if (priv_key->publicKey)
1171 {
1172 const unsigned char *pub_oct;
1173 size_t pub_oct_len;
1174
1175 if (ret->pub_key)
1176 EC_POINT_clear_free(ret->pub_key);
1177 ret->pub_key = EC_POINT_new(ret->group);
1178 if (ret->pub_key == NULL)
1179 {
1180 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1181 goto err;
1182 }
1183 pub_oct = M_ASN1_STRING_data(priv_key->publicKey);
1184 pub_oct_len = M_ASN1_STRING_length(priv_key->publicKey);
1185 /* save the point conversion form */
1186 ret->conv_form = (point_conversion_form_t)(pub_oct[0] & ~0x01);
1187 if (!EC_POINT_oct2point(ret->group, ret->pub_key,
1188 pub_oct, pub_oct_len, NULL))
1189 {
1190 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1191 goto err;
1192 }
1193 }
1194
1195 ok = 1;
1196err:
1197 if (!ok)
1198 {
1199 if (ret)
1200 EC_KEY_free(ret);
1201 ret = NULL;
1202 }
1203
1204 if (priv_key)
1205 EC_PRIVATEKEY_free(priv_key);
1206
1207 return(ret);
1208 }
1209
1210int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out)
1211 {
1212 int ret=0, ok=0;
1213 unsigned char *buffer=NULL;
1214 size_t buf_len=0, tmp_len;
1215 EC_PRIVATEKEY *priv_key=NULL;
1216
1217 if (a == NULL || a->group == NULL || a->priv_key == NULL)
1218 {
1219 ECerr(EC_F_I2D_ECPRIVATEKEY,
1220 ERR_R_PASSED_NULL_PARAMETER);
1221 goto err;
1222 }
1223
1224 if ((priv_key = EC_PRIVATEKEY_new()) == NULL)
1225 {
1226 ECerr(EC_F_I2D_ECPRIVATEKEY,
1227 ERR_R_MALLOC_FAILURE);
1228 goto err;
1229 }
1230
1231 priv_key->version = a->version;
1232
1233 buf_len = (size_t)BN_num_bytes(a->priv_key);
1234 buffer = OPENSSL_malloc(buf_len);
1235 if (buffer == NULL)
1236 {
1237 ECerr(EC_F_I2D_ECPRIVATEKEY,
1238 ERR_R_MALLOC_FAILURE);
1239 goto err;
1240 }
1241
1242 if (!BN_bn2bin(a->priv_key, buffer))
1243 {
1244 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_BN_LIB);
1245 goto err;
1246 }
1247
1248 if (!M_ASN1_OCTET_STRING_set(priv_key->privateKey, buffer, buf_len))
1249 {
1250 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
1251 goto err;
1252 }
1253
1254 if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS))
1255 {
1256 if ((priv_key->parameters = ec_asn1_group2pkparameters(
1257 a->group, priv_key->parameters)) == NULL)
1258 {
1259 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1260 goto err;
1261 }
1262 }
1263
1264 if (!(a->enc_flag & EC_PKEY_NO_PUBKEY))
1265 {
1266 priv_key->publicKey = M_ASN1_BIT_STRING_new();
1267 if (priv_key->publicKey == NULL)
1268 {
1269 ECerr(EC_F_I2D_ECPRIVATEKEY,
1270 ERR_R_MALLOC_FAILURE);
1271 goto err;
1272 }
1273
1274 tmp_len = EC_POINT_point2oct(a->group, a->pub_key,
1275 a->conv_form, NULL, 0, NULL);
1276
1277 if (tmp_len > buf_len)
1278 {
1279 unsigned char *tmp_buffer = OPENSSL_realloc(buffer, tmp_len);
1280 if (!tmp_buffer)
1281 {
1282 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1283 goto err;
1284 }
1285 buffer = tmp_buffer;
1286 buf_len = tmp_len;
1287 }
1288
1289 if (!EC_POINT_point2oct(a->group, a->pub_key,
1290 a->conv_form, buffer, buf_len, NULL))
1291 {
1292 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1293 goto err;
1294 }
1295
1296 priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
1297 priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
1298 if (!M_ASN1_BIT_STRING_set(priv_key->publicKey, buffer,
1299 buf_len))
1300 {
1301 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
1302 goto err;
1303 }
1304 }
1305
1306 if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0)
1307 {
1308 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1309 goto err;
1310 }
1311 ok=1;
1312err:
1313 if (buffer)
1314 OPENSSL_free(buffer);
1315 if (priv_key)
1316 EC_PRIVATEKEY_free(priv_key);
1317 return(ok?ret:0);
1318 }
1319
1320int i2d_ECParameters(EC_KEY *a, unsigned char **out)
1321 {
1322 if (a == NULL)
1323 {
1324 ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1325 return 0;
1326 }
1327 return i2d_ECPKParameters(a->group, out);
1328 }
1329
1330EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len)
1331 {
1332 EC_KEY *ret;
1333
1334 if (in == NULL || *in == NULL)
1335 {
1336 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1337 return NULL;
1338 }
1339
1340 if (a == NULL || *a == NULL)
1341 {
1342 if ((ret = EC_KEY_new()) == NULL)
1343 {
1344 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
1345 return NULL;
1346 }
1347 if (a)
1348 *a = ret;
1349 }
1350 else
1351 ret = *a;
1352
1353 if (!d2i_ECPKParameters(&ret->group, in, len))
1354 {
1355 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
1356 return NULL;
1357 }
1358
1359 return ret;
1360 }
1361
1362EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len)
1363 {
1364 EC_KEY *ret=NULL;
1365
1366 if (a == NULL || (*a) == NULL || (*a)->group == NULL)
1367 {
1368 /* sorry, but a EC_GROUP-structur is necessary
1369 * to set the public key */
1370 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1371 return 0;
1372 }
1373 ret = *a;
1374 if (ret->pub_key == NULL &&
1375 (ret->pub_key = EC_POINT_new(ret->group)) == NULL)
1376 {
1377 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
1378 return 0;
1379 }
1380 if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL))
1381 {
1382 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB);
1383 return 0;
1384 }
1385 /* save the point conversion form */
1386 ret->conv_form = (point_conversion_form_t)(*in[0] & ~0x01);
1387 *in += len;
1388 return ret;
1389 }
1390
1391int i2o_ECPublicKey(EC_KEY *a, unsigned char **out)
1392 {
1393 size_t buf_len=0;
1394 int new_buffer = 0;
1395
1396 if (a == NULL)
1397 {
1398 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1399 return 0;
1400 }
1401
1402 buf_len = EC_POINT_point2oct(a->group, a->pub_key,
1403 a->conv_form, NULL, 0, NULL);
1404
1405 if (out == NULL || buf_len == 0)
1406 /* out == NULL => just return the length of the octet string */
1407 return buf_len;
1408
1409 if (*out == NULL)
1410 {
1411 if ((*out = OPENSSL_malloc(buf_len)) == NULL)
1412 {
1413 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
1414 return 0;
1415 }
1416 new_buffer = 1;
1417 }
1418 if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form,
1419 *out, buf_len, NULL))
1420 {
1421 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB);
1422 OPENSSL_free(*out);
1423 *out = NULL;
1424 return 0;
1425 }
1426 if (!new_buffer)
1427 *out += buf_len;
1428 return buf_len;
1429 }
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-03-21 07:42:03 +0000