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RT3676: Expose ECgroup i2d functions
[thirdparty/openssl.git] / crypto / ec / ec_asn1.c
1 /*
2 * Written by Nils Larsch for the OpenSSL project.
3 */
4 /* ====================================================================
5 * Copyright (c) 2000-2003 The OpenSSL Project. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgment:
21 * "This product includes software developed by the OpenSSL Project
22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
23 *
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 * endorse or promote products derived from this software without
26 * prior written permission. For written permission, please contact
27 * licensing@OpenSSL.org.
28 *
29 * 5. Products derived from this software may not be called "OpenSSL"
30 * nor may "OpenSSL" appear in their names without prior written
31 * permission of the OpenSSL Project.
32 *
33 * 6. Redistributions of any form whatsoever must retain the following
34 * acknowledgment:
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
37 *
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
51 *
52 * This product includes cryptographic software written by Eric Young
53 * (eay@cryptsoft.com). This product includes software written by Tim
54 * Hudson (tjh@cryptsoft.com).
55 *
56 */
57
58 #include <string.h>
59 #include "ec_lcl.h"
60 #include <openssl/err.h>
61 #include <openssl/asn1t.h>
62 #include <openssl/objects.h>
63
64 int EC_GROUP_get_basis_type(const EC_GROUP *group)
65 {
66 int i = 0;
67
68 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
69 NID_X9_62_characteristic_two_field)
70 /* everything else is currently not supported */
71 return 0;
72
73 while (group->poly[i] != 0)
74 i++;
75
76 if (i == 4)
77 return NID_X9_62_ppBasis;
78 else if (i == 2)
79 return NID_X9_62_tpBasis;
80 else
81 /* everything else is currently not supported */
82 return 0;
83 }
84
85 #ifndef OPENSSL_NO_EC2M
86 int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k)
87 {
88 if (group == NULL)
89 return 0;
90
91 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
92 NID_X9_62_characteristic_two_field
93 || !((group->poly[0] != 0) && (group->poly[1] != 0)
94 && (group->poly[2] == 0))) {
95 ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS,
96 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
97 return 0;
98 }
99
100 if (k)
101 *k = group->poly[1];
102
103 return 1;
104 }
105
106 int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1,
107 unsigned int *k2, unsigned int *k3)
108 {
109 if (group == NULL)
110 return 0;
111
112 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
113 NID_X9_62_characteristic_two_field
114 || !((group->poly[0] != 0) && (group->poly[1] != 0)
115 && (group->poly[2] != 0) && (group->poly[3] != 0)
116 && (group->poly[4] == 0))) {
117 ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS,
118 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
119 return 0;
120 }
121
122 if (k1)
123 *k1 = group->poly[3];
124 if (k2)
125 *k2 = group->poly[2];
126 if (k3)
127 *k3 = group->poly[1];
128
129 return 1;
130 }
131 #endif
132
133 /* some structures needed for the asn1 encoding */
134 typedef struct x9_62_pentanomial_st {
135 long k1;
136 long k2;
137 long k3;
138 } X9_62_PENTANOMIAL;
139
140 typedef struct x9_62_characteristic_two_st {
141 long m;
142 ASN1_OBJECT *type;
143 union {
144 char *ptr;
145 /* NID_X9_62_onBasis */
146 ASN1_NULL *onBasis;
147 /* NID_X9_62_tpBasis */
148 ASN1_INTEGER *tpBasis;
149 /* NID_X9_62_ppBasis */
150 X9_62_PENTANOMIAL *ppBasis;
151 /* anything else */
152 ASN1_TYPE *other;
153 } p;
154 } X9_62_CHARACTERISTIC_TWO;
155
156 typedef struct x9_62_fieldid_st {
157 ASN1_OBJECT *fieldType;
158 union {
159 char *ptr;
160 /* NID_X9_62_prime_field */
161 ASN1_INTEGER *prime;
162 /* NID_X9_62_characteristic_two_field */
163 X9_62_CHARACTERISTIC_TWO *char_two;
164 /* anything else */
165 ASN1_TYPE *other;
166 } p;
167 } X9_62_FIELDID;
168
169 typedef struct x9_62_curve_st {
170 ASN1_OCTET_STRING *a;
171 ASN1_OCTET_STRING *b;
172 ASN1_BIT_STRING *seed;
173 } X9_62_CURVE;
174
175 typedef struct ec_parameters_st {
176 long version;
177 X9_62_FIELDID *fieldID;
178 X9_62_CURVE *curve;
179 ASN1_OCTET_STRING *base;
180 ASN1_INTEGER *order;
181 ASN1_INTEGER *cofactor;
182 } ECPARAMETERS;
183
184 struct ecpk_parameters_st {
185 int type;
186 union {
187 ASN1_OBJECT *named_curve;
188 ECPARAMETERS *parameters;
189 ASN1_NULL *implicitlyCA;
190 } value;
191 } /* ECPKPARAMETERS */ ;
192
193 /* SEC1 ECPrivateKey */
194 typedef struct ec_privatekey_st {
195 long version;
196 ASN1_OCTET_STRING *privateKey;
197 ECPKPARAMETERS *parameters;
198 ASN1_BIT_STRING *publicKey;
199 } EC_PRIVATEKEY;
200
201 /* the OpenSSL ASN.1 definitions */
202 ASN1_SEQUENCE(X9_62_PENTANOMIAL) = {
203 ASN1_SIMPLE(X9_62_PENTANOMIAL, k1, LONG),
204 ASN1_SIMPLE(X9_62_PENTANOMIAL, k2, LONG),
205 ASN1_SIMPLE(X9_62_PENTANOMIAL, k3, LONG)
206 } static_ASN1_SEQUENCE_END(X9_62_PENTANOMIAL)
207
208 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
209 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL)
210
211 ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY);
212
213 ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = {
214 ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)),
215 ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)),
216 ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL))
217 } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL);
218
219 ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = {
220 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, LONG),
221 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT),
222 ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO)
223 } static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO)
224
225 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
226 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO)
227
228 ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY);
229
230 ASN1_ADB(X9_62_FIELDID) = {
231 ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)),
232 ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO))
233 } ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL);
234
235 ASN1_SEQUENCE(X9_62_FIELDID) = {
236 ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
237 ASN1_ADB_OBJECT(X9_62_FIELDID)
238 } static_ASN1_SEQUENCE_END(X9_62_FIELDID)
239
240 ASN1_SEQUENCE(X9_62_CURVE) = {
241 ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING),
242 ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING),
243 ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING)
244 } static_ASN1_SEQUENCE_END(X9_62_CURVE)
245
246 ASN1_SEQUENCE(ECPARAMETERS) = {
247 ASN1_SIMPLE(ECPARAMETERS, version, LONG),
248 ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID),
249 ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE),
250 ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING),
251 ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER),
252 ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER)
253 } ASN1_SEQUENCE_END(ECPARAMETERS)
254
255 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
256 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
257
258 ASN1_CHOICE(ECPKPARAMETERS) = {
259 ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT),
260 ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS),
261 ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL)
262 } ASN1_CHOICE_END(ECPKPARAMETERS)
263
264 DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
265 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS)
266 IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
267
268 ASN1_SEQUENCE(EC_PRIVATEKEY) = {
269 ASN1_SIMPLE(EC_PRIVATEKEY, version, LONG),
270 ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING),
271 ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0),
272 ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1)
273 } static_ASN1_SEQUENCE_END(EC_PRIVATEKEY)
274
275 DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
276 DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY)
277 IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
278
279 /* some declarations of internal function */
280
281 /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */
282 static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *);
283 /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */
284 static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *);
285
286 /* the function definitions */
287
288 static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field)
289 {
290 int ok = 0, nid;
291 BIGNUM *tmp = NULL;
292
293 if (group == NULL || field == NULL)
294 return 0;
295
296 /* clear the old values (if necessary) */
297 ASN1_OBJECT_free(field->fieldType);
298 ASN1_TYPE_free(field->p.other);
299
300 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
301 /* set OID for the field */
302 if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) {
303 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
304 goto err;
305 }
306
307 if (nid == NID_X9_62_prime_field) {
308 if ((tmp = BN_new()) == NULL) {
309 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
310 goto err;
311 }
312 /* the parameters are specified by the prime number p */
313 if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL)) {
314 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
315 goto err;
316 }
317 /* set the prime number */
318 field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL);
319 if (field->p.prime == NULL) {
320 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
321 goto err;
322 }
323 } else if (nid == NID_X9_62_characteristic_two_field)
324 #ifdef OPENSSL_NO_EC2M
325 {
326 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED);
327 goto err;
328 }
329 #else
330 {
331 int field_type;
332 X9_62_CHARACTERISTIC_TWO *char_two;
333
334 field->p.char_two = X9_62_CHARACTERISTIC_TWO_new();
335 char_two = field->p.char_two;
336
337 if (char_two == NULL) {
338 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
339 goto err;
340 }
341
342 char_two->m = (long)EC_GROUP_get_degree(group);
343
344 field_type = EC_GROUP_get_basis_type(group);
345
346 if (field_type == 0) {
347 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
348 goto err;
349 }
350 /* set base type OID */
351 if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) {
352 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
353 goto err;
354 }
355
356 if (field_type == NID_X9_62_tpBasis) {
357 unsigned int k;
358
359 if (!EC_GROUP_get_trinomial_basis(group, &k))
360 goto err;
361
362 char_two->p.tpBasis = ASN1_INTEGER_new();
363 if (char_two->p.tpBasis == NULL) {
364 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
365 goto err;
366 }
367 if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) {
368 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
369 goto err;
370 }
371 } else if (field_type == NID_X9_62_ppBasis) {
372 unsigned int k1, k2, k3;
373
374 if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3))
375 goto err;
376
377 char_two->p.ppBasis = X9_62_PENTANOMIAL_new();
378 if (char_two->p.ppBasis == NULL) {
379 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
380 goto err;
381 }
382
383 /* set k? values */
384 char_two->p.ppBasis->k1 = (long)k1;
385 char_two->p.ppBasis->k2 = (long)k2;
386 char_two->p.ppBasis->k3 = (long)k3;
387 } else { /* field_type == NID_X9_62_onBasis */
388
389 /* for ONB the parameters are (asn1) NULL */
390 char_two->p.onBasis = ASN1_NULL_new();
391 if (char_two->p.onBasis == NULL) {
392 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
393 goto err;
394 }
395 }
396 }
397 #endif
398 else {
399 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_UNSUPPORTED_FIELD);
400 goto err;
401 }
402
403 ok = 1;
404
405 err:
406 BN_free(tmp);
407 return (ok);
408 }
409
410 static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve)
411 {
412 int ok = 0, nid;
413 BIGNUM *tmp_1 = NULL, *tmp_2 = NULL;
414 unsigned char *buffer_1 = NULL, *buffer_2 = NULL,
415 *a_buf = NULL, *b_buf = NULL;
416 size_t len_1, len_2;
417 unsigned char char_zero = 0;
418
419 if (!group || !curve || !curve->a || !curve->b)
420 return 0;
421
422 if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) {
423 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
424 goto err;
425 }
426
427 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
428
429 /* get a and b */
430 if (nid == NID_X9_62_prime_field) {
431 if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL)) {
432 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
433 goto err;
434 }
435 }
436 #ifndef OPENSSL_NO_EC2M
437 else { /* nid == NID_X9_62_characteristic_two_field */
438
439 if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL)) {
440 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
441 goto err;
442 }
443 }
444 #endif
445 len_1 = (size_t)BN_num_bytes(tmp_1);
446 len_2 = (size_t)BN_num_bytes(tmp_2);
447
448 if (len_1 == 0) {
449 /* len_1 == 0 => a == 0 */
450 a_buf = &char_zero;
451 len_1 = 1;
452 } else {
453 if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL) {
454 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
455 goto err;
456 }
457 if ((len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0) {
458 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
459 goto err;
460 }
461 a_buf = buffer_1;
462 }
463
464 if (len_2 == 0) {
465 /* len_2 == 0 => b == 0 */
466 b_buf = &char_zero;
467 len_2 = 1;
468 } else {
469 if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL) {
470 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
471 goto err;
472 }
473 if ((len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0) {
474 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
475 goto err;
476 }
477 b_buf = buffer_2;
478 }
479
480 /* set a and b */
481 if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) ||
482 !ASN1_OCTET_STRING_set(curve->b, b_buf, len_2)) {
483 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
484 goto err;
485 }
486
487 /* set the seed (optional) */
488 if (group->seed) {
489 if (!curve->seed)
490 if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) {
491 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
492 goto err;
493 }
494 curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
495 curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT;
496 if (!ASN1_BIT_STRING_set(curve->seed, group->seed,
497 (int)group->seed_len)) {
498 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
499 goto err;
500 }
501 } else {
502 ASN1_BIT_STRING_free(curve->seed);
503 curve->seed = NULL;
504 }
505
506 ok = 1;
507
508 err:
509 OPENSSL_free(buffer_1);
510 OPENSSL_free(buffer_2);
511 BN_free(tmp_1);
512 BN_free(tmp_2);
513 return (ok);
514 }
515
516 ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group,
517 ECPARAMETERS *params)
518 {
519 size_t len = 0;
520 ECPARAMETERS *ret = NULL;
521 const BIGNUM *tmp;
522 unsigned char *buffer = NULL;
523 const EC_POINT *point = NULL;
524 point_conversion_form_t form;
525
526 if (params == NULL) {
527 if ((ret = ECPARAMETERS_new()) == NULL) {
528 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
529 goto err;
530 }
531 } else
532 ret = params;
533
534 /* set the version (always one) */
535 ret->version = (long)0x1;
536
537 /* set the fieldID */
538 if (!ec_asn1_group2fieldid(group, ret->fieldID)) {
539 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
540 goto err;
541 }
542
543 /* set the curve */
544 if (!ec_asn1_group2curve(group, ret->curve)) {
545 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
546 goto err;
547 }
548
549 /* set the base point */
550 if ((point = EC_GROUP_get0_generator(group)) == NULL) {
551 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, EC_R_UNDEFINED_GENERATOR);
552 goto err;
553 }
554
555 form = EC_GROUP_get_point_conversion_form(group);
556
557 len = EC_POINT_point2buf(group, point, form, &buffer, NULL);
558 if (len == 0) {
559 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
560 goto err;
561 }
562 if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) {
563 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
564 goto err;
565 }
566 if (!ASN1_OCTET_STRING_set(ret->base, buffer, len)) {
567 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
568 goto err;
569 }
570
571 /* set the order */
572 tmp = EC_GROUP_get0_order(group);
573 if (tmp == NULL) {
574 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB);
575 goto err;
576 }
577 ret->order = BN_to_ASN1_INTEGER(tmp, ret->order);
578 if (ret->order == NULL) {
579 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
580 goto err;
581 }
582
583 /* set the cofactor (optional) */
584 tmp = EC_GROUP_get0_cofactor(group);
585 if (tmp != NULL) {
586 ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor);
587 if (ret->cofactor == NULL) {
588 ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB);
589 goto err;
590 }
591 }
592
593 return ret;
594
595 err:
596 if (params == NULL)
597 ECPARAMETERS_free(ret);
598 OPENSSL_free(buffer);
599 return NULL;
600 }
601
602 ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group,
603 ECPKPARAMETERS *params)
604 {
605 int ok = 1, tmp;
606 ECPKPARAMETERS *ret = params;
607
608 if (ret == NULL) {
609 if ((ret = ECPKPARAMETERS_new()) == NULL) {
610 ECerr(EC_F_EC_GROUP_GET_ECPKPARAMETERS, ERR_R_MALLOC_FAILURE);
611 return NULL;
612 }
613 } else {
614 if (ret->type == 0)
615 ASN1_OBJECT_free(ret->value.named_curve);
616 else if (ret->type == 1 && ret->value.parameters)
617 ECPARAMETERS_free(ret->value.parameters);
618 }
619
620 if (EC_GROUP_get_asn1_flag(group)) {
621 /*
622 * use the asn1 OID to describe the the elliptic curve parameters
623 */
624 tmp = EC_GROUP_get_curve_name(group);
625 if (tmp) {
626 ret->type = 0;
627 if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
628 ok = 0;
629 } else
630 /* we don't know the nid => ERROR */
631 ok = 0;
632 } else {
633 /* use the ECPARAMETERS structure */
634 ret->type = 1;
635 if ((ret->value.parameters =
636 EC_GROUP_get_ecparameters(group, NULL)) == NULL)
637 ok = 0;
638 }
639
640 if (!ok) {
641 ECPKPARAMETERS_free(ret);
642 return NULL;
643 }
644 return ret;
645 }
646
647 EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params)
648 {
649 int ok = 0, tmp;
650 EC_GROUP *ret = NULL;
651 BIGNUM *p = NULL, *a = NULL, *b = NULL;
652 EC_POINT *point = NULL;
653 long field_bits;
654
655 if (!params->fieldID || !params->fieldID->fieldType ||
656 !params->fieldID->p.ptr) {
657 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
658 goto err;
659 }
660
661 /* now extract the curve parameters a and b */
662 if (!params->curve || !params->curve->a ||
663 !params->curve->a->data || !params->curve->b ||
664 !params->curve->b->data) {
665 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
666 goto err;
667 }
668 a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL);
669 if (a == NULL) {
670 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB);
671 goto err;
672 }
673 b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL);
674 if (b == NULL) {
675 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB);
676 goto err;
677 }
678
679 /* get the field parameters */
680 tmp = OBJ_obj2nid(params->fieldID->fieldType);
681 if (tmp == NID_X9_62_characteristic_two_field)
682 #ifdef OPENSSL_NO_EC2M
683 {
684 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_GF2M_NOT_SUPPORTED);
685 goto err;
686 }
687 #else
688 {
689 X9_62_CHARACTERISTIC_TWO *char_two;
690
691 char_two = params->fieldID->p.char_two;
692
693 field_bits = char_two->m;
694 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
695 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE);
696 goto err;
697 }
698
699 if ((p = BN_new()) == NULL) {
700 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
701 goto err;
702 }
703
704 /* get the base type */
705 tmp = OBJ_obj2nid(char_two->type);
706
707 if (tmp == NID_X9_62_tpBasis) {
708 long tmp_long;
709
710 if (!char_two->p.tpBasis) {
711 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
712 goto err;
713 }
714
715 tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis);
716
717 if (!(char_two->m > tmp_long && tmp_long > 0)) {
718 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS,
719 EC_R_INVALID_TRINOMIAL_BASIS);
720 goto err;
721 }
722
723 /* create the polynomial */
724 if (!BN_set_bit(p, (int)char_two->m))
725 goto err;
726 if (!BN_set_bit(p, (int)tmp_long))
727 goto err;
728 if (!BN_set_bit(p, 0))
729 goto err;
730 } else if (tmp == NID_X9_62_ppBasis) {
731 X9_62_PENTANOMIAL *penta;
732
733 penta = char_two->p.ppBasis;
734 if (!penta) {
735 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
736 goto err;
737 }
738
739 if (!
740 (char_two->m > penta->k3 && penta->k3 > penta->k2
741 && penta->k2 > penta->k1 && penta->k1 > 0)) {
742 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS,
743 EC_R_INVALID_PENTANOMIAL_BASIS);
744 goto err;
745 }
746
747 /* create the polynomial */
748 if (!BN_set_bit(p, (int)char_two->m))
749 goto err;
750 if (!BN_set_bit(p, (int)penta->k1))
751 goto err;
752 if (!BN_set_bit(p, (int)penta->k2))
753 goto err;
754 if (!BN_set_bit(p, (int)penta->k3))
755 goto err;
756 if (!BN_set_bit(p, 0))
757 goto err;
758 } else if (tmp == NID_X9_62_onBasis) {
759 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_NOT_IMPLEMENTED);
760 goto err;
761 } else { /* error */
762
763 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
764 goto err;
765 }
766
767 /* create the EC_GROUP structure */
768 ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL);
769 }
770 #endif
771 else if (tmp == NID_X9_62_prime_field) {
772 /* we have a curve over a prime field */
773 /* extract the prime number */
774 if (!params->fieldID->p.prime) {
775 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
776 goto err;
777 }
778 p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL);
779 if (p == NULL) {
780 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
781 goto err;
782 }
783
784 if (BN_is_negative(p) || BN_is_zero(p)) {
785 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD);
786 goto err;
787 }
788
789 field_bits = BN_num_bits(p);
790 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) {
791 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE);
792 goto err;
793 }
794
795 /* create the EC_GROUP structure */
796 ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
797 } else {
798 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD);
799 goto err;
800 }
801
802 if (ret == NULL) {
803 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
804 goto err;
805 }
806
807 /* extract seed (optional) */
808 if (params->curve->seed != NULL) {
809 OPENSSL_free(ret->seed);
810 if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL) {
811 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
812 goto err;
813 }
814 memcpy(ret->seed, params->curve->seed->data,
815 params->curve->seed->length);
816 ret->seed_len = params->curve->seed->length;
817 }
818
819 if (!params->order || !params->base || !params->base->data) {
820 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR);
821 goto err;
822 }
823
824 if ((point = EC_POINT_new(ret)) == NULL)
825 goto err;
826
827 /* set the point conversion form */
828 EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t)
829 (params->base->data[0] & ~0x01));
830
831 /* extract the ec point */
832 if (!EC_POINT_oct2point(ret, point, params->base->data,
833 params->base->length, NULL)) {
834 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
835 goto err;
836 }
837
838 /* extract the order */
839 if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) {
840 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
841 goto err;
842 }
843 if (BN_is_negative(a) || BN_is_zero(a)) {
844 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER);
845 goto err;
846 }
847 if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */
848 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER);
849 goto err;
850 }
851
852 /* extract the cofactor (optional) */
853 if (params->cofactor == NULL) {
854 BN_free(b);
855 b = NULL;
856 } else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) {
857 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB);
858 goto err;
859 }
860 /* set the generator, order and cofactor (if present) */
861 if (!EC_GROUP_set_generator(ret, point, a, b)) {
862 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB);
863 goto err;
864 }
865
866 ok = 1;
867
868 err:
869 if (!ok) {
870 EC_GROUP_clear_free(ret);
871 ret = NULL;
872 }
873
874 BN_free(p);
875 BN_free(a);
876 BN_free(b);
877 EC_POINT_free(point);
878 return (ret);
879 }
880
881 EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params)
882 {
883 EC_GROUP *ret = NULL;
884 int tmp = 0;
885
886 if (params == NULL) {
887 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_MISSING_PARAMETERS);
888 return NULL;
889 }
890
891 if (params->type == 0) { /* the curve is given by an OID */
892 tmp = OBJ_obj2nid(params->value.named_curve);
893 if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) {
894 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS,
895 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
896 return NULL;
897 }
898 EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE);
899 } else if (params->type == 1) { /* the parameters are given by a
900 * ECPARAMETERS structure */
901 ret = EC_GROUP_new_from_ecparameters(params->value.parameters);
902 if (!ret) {
903 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, ERR_R_EC_LIB);
904 return NULL;
905 }
906 EC_GROUP_set_asn1_flag(ret, 0x0);
907 } else if (params->type == 2) { /* implicitlyCA */
908 return NULL;
909 } else {
910 ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_ASN1_ERROR);
911 return NULL;
912 }
913
914 return ret;
915 }
916
917 /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
918
919 EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len)
920 {
921 EC_GROUP *group = NULL;
922 ECPKPARAMETERS *params = NULL;
923 const unsigned char *p = *in;
924
925 if ((params = d2i_ECPKPARAMETERS(NULL, &p, len)) == NULL) {
926 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
927 ECPKPARAMETERS_free(params);
928 return NULL;
929 }
930
931 if ((group = EC_GROUP_new_from_ecpkparameters(params)) == NULL) {
932 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
933 ECPKPARAMETERS_free(params);
934 return NULL;
935 }
936
937 if (a) {
938 EC_GROUP_clear_free(*a);
939 *a = group;
940 }
941
942 ECPKPARAMETERS_free(params);
943 *in = p;
944 return (group);
945 }
946
947 int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out)
948 {
949 int ret = 0;
950 ECPKPARAMETERS *tmp = EC_GROUP_get_ecpkparameters(a, NULL);
951 if (tmp == NULL) {
952 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE);
953 return 0;
954 }
955 if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) {
956 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE);
957 ECPKPARAMETERS_free(tmp);
958 return 0;
959 }
960 ECPKPARAMETERS_free(tmp);
961 return (ret);
962 }
963
964 /* some EC_KEY functions */
965
966 EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len)
967 {
968 EC_KEY *ret = NULL;
969 EC_PRIVATEKEY *priv_key = NULL;
970 const unsigned char *p = *in;
971
972 if ((priv_key = d2i_EC_PRIVATEKEY(NULL, &p, len)) == NULL) {
973 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
974 return NULL;
975 }
976
977 if (a == NULL || *a == NULL) {
978 if ((ret = EC_KEY_new()) == NULL) {
979 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
980 goto err;
981 }
982 } else
983 ret = *a;
984
985 if (priv_key->parameters) {
986 EC_GROUP_clear_free(ret->group);
987 ret->group = EC_GROUP_new_from_ecpkparameters(priv_key->parameters);
988 }
989
990 if (ret->group == NULL) {
991 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
992 goto err;
993 }
994
995 ret->version = priv_key->version;
996
997 if (priv_key->privateKey) {
998 ASN1_OCTET_STRING *pkey = priv_key->privateKey;
999 if (EC_KEY_oct2priv(ret, ASN1_STRING_data(pkey),
1000 ASN1_STRING_length(pkey)) == 0)
1001 goto err;
1002 } else {
1003 ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY);
1004 goto err;
1005 }
1006
1007 EC_POINT_clear_free(ret->pub_key);
1008 ret->pub_key = EC_POINT_new(ret->group);
1009 if (ret->pub_key == NULL) {
1010 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1011 goto err;
1012 }
1013
1014 if (priv_key->publicKey) {
1015 const unsigned char *pub_oct;
1016 int pub_oct_len;
1017
1018 pub_oct = ASN1_STRING_data(priv_key->publicKey);
1019 pub_oct_len = ASN1_STRING_length(priv_key->publicKey);
1020 if (!EC_KEY_oct2key(ret, pub_oct, pub_oct_len, NULL)) {
1021 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1022 goto err;
1023 }
1024 } else {
1025 if (ret->group->meth->keygenpub == NULL
1026 || ret->group->meth->keygenpub(ret) == 0)
1027 goto err;
1028 /* Remember the original private-key-only encoding. */
1029 ret->enc_flag |= EC_PKEY_NO_PUBKEY;
1030 }
1031
1032 if (a)
1033 *a = ret;
1034 EC_PRIVATEKEY_free(priv_key);
1035 *in = p;
1036 return (ret);
1037
1038 err:
1039 if (a == NULL || *a != ret)
1040 EC_KEY_free(ret);
1041 EC_PRIVATEKEY_free(priv_key);
1042 return NULL;
1043 }
1044
1045 int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out)
1046 {
1047 int ret = 0, ok = 0;
1048 unsigned char *priv= NULL, *pub= NULL;
1049 size_t privlen = 0, publen = 0;
1050
1051 EC_PRIVATEKEY *priv_key = NULL;
1052
1053 if (a == NULL || a->group == NULL ||
1054 (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) {
1055 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER);
1056 goto err;
1057 }
1058
1059 if ((priv_key = EC_PRIVATEKEY_new()) == NULL) {
1060 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1061 goto err;
1062 }
1063
1064 priv_key->version = a->version;
1065
1066 privlen = EC_KEY_priv2buf(a, &priv);
1067
1068 if (privlen == 0) {
1069 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1070 goto err;
1071 }
1072
1073 ASN1_STRING_set0(priv_key->privateKey, priv, privlen);
1074 priv = NULL;
1075
1076 if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) {
1077 if ((priv_key->parameters =
1078 EC_GROUP_get_ecpkparameters(a->group,
1079 priv_key->parameters)) == NULL) {
1080 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1081 goto err;
1082 }
1083 }
1084
1085 if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) {
1086 priv_key->publicKey = ASN1_BIT_STRING_new();
1087 if (priv_key->publicKey == NULL) {
1088 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1089 goto err;
1090 }
1091
1092 publen = EC_KEY_key2buf(a, a->conv_form, &pub, NULL);
1093
1094 if (publen == 0) {
1095 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1096 goto err;
1097 }
1098
1099 priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
1100 priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
1101 ASN1_STRING_set0(priv_key->publicKey, pub, publen);
1102 pub = NULL;
1103 }
1104
1105 if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) {
1106 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1107 goto err;
1108 }
1109 ok = 1;
1110 err:
1111 OPENSSL_clear_free(priv, privlen);
1112 OPENSSL_free(pub);
1113 EC_PRIVATEKEY_free(priv_key);
1114 return (ok ? ret : 0);
1115 }
1116
1117 int i2d_ECParameters(EC_KEY *a, unsigned char **out)
1118 {
1119 if (a == NULL) {
1120 ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1121 return 0;
1122 }
1123 return i2d_ECPKParameters(a->group, out);
1124 }
1125
1126 EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len)
1127 {
1128 EC_KEY *ret;
1129
1130 if (in == NULL || *in == NULL) {
1131 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1132 return NULL;
1133 }
1134
1135 if (a == NULL || *a == NULL) {
1136 if ((ret = EC_KEY_new()) == NULL) {
1137 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
1138 return NULL;
1139 }
1140 } else
1141 ret = *a;
1142
1143 if (!d2i_ECPKParameters(&ret->group, in, len)) {
1144 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
1145 if (a == NULL || *a != ret)
1146 EC_KEY_free(ret);
1147 return NULL;
1148 }
1149
1150 if (a)
1151 *a = ret;
1152
1153 return ret;
1154 }
1155
1156 EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len)
1157 {
1158 EC_KEY *ret = NULL;
1159
1160 if (a == NULL || (*a) == NULL || (*a)->group == NULL) {
1161 /*
1162 * sorry, but a EC_GROUP-structure is necessary to set the public key
1163 */
1164 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1165 return 0;
1166 }
1167 ret = *a;
1168 if (!EC_KEY_oct2key(ret, *in, len, NULL)) {
1169 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB);
1170 return 0;
1171 }
1172 *in += len;
1173 return ret;
1174 }
1175
1176 int i2o_ECPublicKey(EC_KEY *a, unsigned char **out)
1177 {
1178 size_t buf_len = 0;
1179 int new_buffer = 0;
1180
1181 if (a == NULL) {
1182 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER);
1183 return 0;
1184 }
1185
1186 buf_len = EC_POINT_point2oct(a->group, a->pub_key,
1187 a->conv_form, NULL, 0, NULL);
1188
1189 if (out == NULL || buf_len == 0)
1190 /* out == NULL => just return the length of the octet string */
1191 return buf_len;
1192
1193 if (*out == NULL) {
1194 if ((*out = OPENSSL_malloc(buf_len)) == NULL) {
1195 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE);
1196 return 0;
1197 }
1198 new_buffer = 1;
1199 }
1200 if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form,
1201 *out, buf_len, NULL)) {
1202 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB);
1203 if (new_buffer) {
1204 OPENSSL_free(*out);
1205 *out = NULL;
1206 }
1207 return 0;
1208 }
1209 if (!new_buffer)
1210 *out += buf_len;
1211 return buf_len;
1212 }
1213
1214 ASN1_SEQUENCE(ECDSA_SIG) = {
1215 ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM),
1216 ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM)
1217 } static_ASN1_SEQUENCE_END(ECDSA_SIG)
1218
1219 DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG)
1220 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG)
1221 IMPLEMENT_ASN1_FUNCTIONS_const(ECDSA_SIG)
1222
1223 void ECDSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, ECDSA_SIG *sig)
1224 {
1225 if (pr != NULL)
1226 *pr = sig->r;
1227 if (ps != NULL)
1228 *ps = sig->s;
1229 }
1230
1231 int ECDSA_size(const EC_KEY *r)
1232 {
1233 int ret, i;
1234 ASN1_INTEGER bs;
1235 unsigned char buf[4];
1236 const EC_GROUP *group;
1237
1238 if (r == NULL)
1239 return 0;
1240 group = EC_KEY_get0_group(r);
1241 if (group == NULL)
1242 return 0;
1243
1244 i = EC_GROUP_order_bits(group);
1245 if (i == 0)
1246 return 0;
1247 bs.length = (i + 7) / 8;
1248 bs.data = buf;
1249 bs.type = V_ASN1_INTEGER;
1250 /* If the top bit is set the asn1 encoding is 1 larger. */
1251 buf[0] = 0xff;
1252
1253 i = i2d_ASN1_INTEGER(&bs, NULL);
1254 i += i; /* r and s */
1255 ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
1256 return (ret);
1257 }
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