]> git.ipfire.org Git - thirdparty/openssl.git/blame - crypto/ec/ec_asn1.c
projects / thirdparty / openssl.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Ooops forgot to recognise V_ASN1_GENERALSTRING.
[thirdparty/openssl.git] / crypto / ec / ec_asn1.c
CommitLineData
012c86ab 1/* crypto/ec/ec_asn1.c */
7e31164a
BM		 2/*
3 * Written by Nils Larsch for the OpenSSL project.
4 */
012c86ab 5/* ====================================================================
82516e3b 6 * Copyright (c) 2000-2003 The OpenSSL Project. All rights reserved.
012c86ab
BM		 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
5454829a 59#include <string.h>
012c86ab 60#include "ec_lcl.h"
0bee0e62 61#include <openssl/err.h>
012c86ab
BM		 62#include <openssl/asn1t.h>
63#include <openssl/objects.h>
64
8aefe253 65
34f1f2a8 66int EC_GROUP_get_basis_type(const EC_GROUP *group)
8aefe253 67 {
34f1f2a8 68 int i=0;
8aefe253
BM		 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)
8aefe253 79 return NID_X9_62_ppBasis;
8aefe253 80 else if (i == 2)
8aefe253 81 return NID_X9_62_tpBasis;
8aefe253
BM		 82 else
83 /* everything else is currently not supported */
84 return 0;
85 }
86
34f1f2a8
BM		 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
8aefe253
BM		 128
129
012c86ab
BM		 130/* some structures needed for the asn1 encoding */
131typedef struct x9_62_fieldid_st {
132 ASN1_OBJECT *fieldType;
133 ASN1_TYPE *parameters;
134 } X9_62_FIELDID;
135
136typedef struct x9_62_characteristic_two_st {
7e31164a 137 long m;
012c86ab
BM		 138 ASN1_OBJECT *basis;
139 ASN1_TYPE *parameters;
140 } X9_62_CHARACTERISTIC_TWO;
141
142typedef struct x9_62_pentanomial_st {
7e31164a
BM		 143 long k1;
144 long k2;
145 long k3;
012c86ab
BM		 146 } X9_62_PENTANOMIAL;
147
148typedef struct x9_62_curve_st {
149 ASN1_OCTET_STRING *a;
150 ASN1_OCTET_STRING *b;
151 ASN1_BIT_STRING *seed;
152 } X9_62_CURVE;
153
14a7cfb3 154typedef struct ec_parameters_st {
7e31164a 155 long version;
012c86ab
BM		 156 X9_62_FIELDID *fieldID;
157 X9_62_CURVE *curve;
158 ASN1_OCTET_STRING *base;
159 ASN1_INTEGER *order;
160 ASN1_INTEGER *cofactor;
14a7cfb3 161 } ECPARAMETERS;
012c86ab
BM		 162
163struct ecpk_parameters_st {
164 int type;
165 union {
166 ASN1_OBJECT *named_curve;
167 ECPARAMETERS *parameters;
168 ASN1_NULL *implicitlyCA;
169 } value;
170 }/* ECPKPARAMETERS */;
171
14a7cfb3
BM		 172/* SEC1 ECPrivateKey */
173typedef struct ec_privatekey_st {
7e31164a 174 long version;
14a7cfb3
BM		 175 ASN1_OCTET_STRING *privateKey;
176 ECPKPARAMETERS *parameters;
177 ASN1_BIT_STRING *publicKey;
178 } EC_PRIVATEKEY;
179
012c86ab
BM		 180/* the OpenSSL asn1 definitions */
181
182ASN1_SEQUENCE(X9_62_FIELDID) = {
183 ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
184 ASN1_SIMPLE(X9_62_FIELDID, parameters, ASN1_ANY)
185} ASN1_SEQUENCE_END(X9_62_FIELDID)
186
187DECLARE_ASN1_FUNCTIONS_const(X9_62_FIELDID)
188DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_FIELDID, X9_62_FIELDID)
189IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_FIELDID)
190
191ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = {
7e31164a 192 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, LONG),
012c86ab
BM		 193 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, basis, ASN1_OBJECT),
194 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, parameters, ASN1_ANY)
195} ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO)
196
197DECLARE_ASN1_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO)
198DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO, X9_62_CHARACTERISTIC_TWO)
199IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO)
200
201ASN1_SEQUENCE(X9_62_PENTANOMIAL) = {
7e31164a
BM		 202 ASN1_SIMPLE(X9_62_PENTANOMIAL, k1, LONG),
203 ASN1_SIMPLE(X9_62_PENTANOMIAL, k2, LONG),
204 ASN1_SIMPLE(X9_62_PENTANOMIAL, k3, LONG)
012c86ab
BM		 205} ASN1_SEQUENCE_END(X9_62_PENTANOMIAL)
206
207DECLARE_ASN1_FUNCTIONS_const(X9_62_PENTANOMIAL)
208DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_PENTANOMIAL, X9_62_PENTANOMIAL)
209IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_PENTANOMIAL)
210
211ASN1_SEQUENCE(X9_62_CURVE) = {
212 ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING),
213 ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING),
214 ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING)
215} ASN1_SEQUENCE_END(X9_62_CURVE)
216
217DECLARE_ASN1_FUNCTIONS_const(X9_62_CURVE)
218DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_CURVE, X9_62_CURVE)
219IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_CURVE)
220
221ASN1_SEQUENCE(ECPARAMETERS) = {
7e31164a 222 ASN1_SIMPLE(ECPARAMETERS, version, LONG),
012c86ab
BM		 223 ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID),
224 ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE),
225 ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING),
226 ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER),
82516e3b 227 ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER)
012c86ab
BM		 228} ASN1_SEQUENCE_END(ECPARAMETERS)
229
230DECLARE_ASN1_FUNCTIONS_const(ECPARAMETERS)
14a7cfb3 231DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPARAMETERS, ECPARAMETERS)
012c86ab
BM		 232IMPLEMENT_ASN1_FUNCTIONS_const(ECPARAMETERS)
233
234ASN1_CHOICE(ECPKPARAMETERS) = {
235 ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT),
236 ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS),
237 ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL)
238} ASN1_CHOICE_END(ECPKPARAMETERS)
239
240DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
14a7cfb3 241DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS)
012c86ab
BM		 242IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
243
0bee0e62
BM		 244ASN1_SEQUENCE(EC_PRIVATEKEY) = {
245 ASN1_SIMPLE(EC_PRIVATEKEY, version, LONG),
246 ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING),
14a7cfb3
BM		 247 ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0),
248 ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1)
0bee0e62
BM		 249} ASN1_SEQUENCE_END(EC_PRIVATEKEY)
250
14a7cfb3
BM		 251DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
252DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY)
0bee0e62
BM		 253IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY)
254
7e31164a 255/* some declarations of internal function */
012c86ab 256
7e31164a
BM		 257/* ec_asn1_group2field() creates a X9_62_FIELDID object from a
258 * EC_GROUP object */
012c86ab 259static X9_62_FIELDID *ec_asn1_group2field(const EC_GROUP *, X9_62_FIELDID *);
7e31164a
BM		 260/* ec_asn1_group2curve() creates a X9_62_CURVE object from a
261 * EC_GROUP object */
012c86ab 262static X9_62_CURVE *ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *);
7e31164a
BM		 263/* ec_asn1_parameters2group() creates a EC_GROUP object from a
264 * ECPARAMETERS object */
012c86ab 265static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *);
7e31164a
BM		 266/* ec_asn1_group2parameters() creates a ECPARAMETERS object from a
267 * EC_GROUP object */
268static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *,ECPARAMETERS *);
269/* ec_asn1_pkparameters2group() creates a EC_GROUP object from a
270 * ECPKPARAMETERS object */
271static EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *);
272/* ec_asn1_group2pkparameters() creates a ECPKPARAMETERS object from a
273 * EC_GROUP object */
274static ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *,
275 ECPKPARAMETERS *);
276
277
278/* the function definitions */
012c86ab
BM		 279
280static X9_62_FIELDID *ec_asn1_group2field(const EC_GROUP *group,
281 X9_62_FIELDID *field)
282 {
7e31164a
BM		 283 int ok=0, nid;
284 X9_62_FIELDID *ret = NULL;
285 X9_62_CHARACTERISTIC_TWO *char_two = NULL;
286 X9_62_PENTANOMIAL *penta = NULL;
287 BIGNUM *tmp = NULL;
288 unsigned char *buffer = NULL;
289 unsigned char *pp;
290 size_t buf_len = 0;
012c86ab
BM		 291
292 if (field == NULL)
293 {
294 if ((ret = X9_62_FIELDID_new()) == NULL)
295 {
296 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
297 return NULL;
298 }
299 }
300 else
301 {
302 ret = field;
7e31164a 303 /* clear the old values */
012c86ab
BM		 304 if (ret->fieldType != NULL)
305 ASN1_OBJECT_free(ret->fieldType);
306 if (ret->parameters != NULL)
307 ASN1_TYPE_free(ret->parameters);
308 }
309
310 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
7e31164a 311 /* set OID for the field */
012c86ab
BM		 312 if ((ret->fieldType = OBJ_nid2obj(nid)) == NULL)
313 {
314 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
315 goto err;
316 }
317
7e31164a 318 if ((ret->parameters = ASN1_TYPE_new()) == NULL)
012c86ab
BM		 319 {
320 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
321 goto err;
322 }
7e31164a
BM		 323
324 if (nid == NID_X9_62_prime_field)
325 {
326 if ((tmp = BN_new()) == NULL)
012c86ab
BM		 327 {
328 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
329 goto err;
330 }
7e31164a 331 /* the parameters are specified by the prime number p */
012c86ab
BM		 332 ret->parameters->type = V_ASN1_INTEGER;
333 if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL))
334 {
335 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
336 goto err;
337 }
7e31164a 338 /* set the prime number */
012c86ab
BM		 339 ret->parameters->value.integer = BN_to_ASN1_INTEGER(tmp, NULL);
340 if (ret->parameters->value.integer == NULL)
341 {
342 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
343 goto err;
344 }
345 }
7e31164a
BM		 346 else /* nid == NID_X9_62_characteristic_two_field */
347 {
348 int field_type;
7e31164a
BM		 349
350 char_two = X9_62_CHARACTERISTIC_TWO_new();
351 if (char_two == NULL)
352 {
353 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
354 goto err;
355 }
356
357 char_two->m = (long)EC_GROUP_get_degree(group);
358
34f1f2a8 359 field_type = EC_GROUP_get_basis_type(group);
7e31164a
BM		 360
361 if (field_type == 0)
362 {
363 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
364 goto err;
365 }
366 /* set base type OID */
367 if ((char_two->basis = OBJ_nid2obj(field_type)) == NULL)
368 {
369 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
370 goto err;
371 }
372
373 if (field_type == NID_X9_62_tpBasis)
374 {
34f1f2a8
BM		 375 unsigned int k;
376
377 if (!EC_GROUP_get_trinomial_basis(group, &k))
378 goto err;
379
7e31164a
BM		 380 char_two->parameters->type = V_ASN1_INTEGER;
381 char_two->parameters->value.integer =
382 ASN1_INTEGER_new();
383 if (char_two->parameters->value.integer == NULL)
384 {
385 ECerr(EC_F_EC_ASN1_GROUP2FIELDID,
386 ERR_R_ASN1_LIB);
387 goto err;
388 }
34f1f2a8 389 if (!ASN1_INTEGER_set(char_two->parameters->value.integer, (long)k))
7e31164a
BM		 390 {
391 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS,
392 ERR_R_ASN1_LIB);
393 goto err;
394 }
395 }
396 else if (field_type == NID_X9_62_ppBasis)
397 {
34f1f2a8
BM		 398 unsigned int k1, k2, k3;
399
400 if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3))
401 goto err;
402
7e31164a
BM		 403 penta = X9_62_PENTANOMIAL_new();
404 /* set k? values */
405 penta->k1 = (long)k1;
406 penta->k2 = (long)k2;
407 penta->k3 = (long)k3;
408 /* get the length of the encoded structure */
409 buf_len = i2d_X9_62_PENTANOMIAL(penta, NULL);
410 if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
411 {
412 ECerr(EC_F_EC_ASN1_GROUP2FIELDID,
413 ERR_R_MALLOC_FAILURE);
414 goto err;
415 }
416 pp = buffer;
417 i2d_X9_62_PENTANOMIAL(penta, &pp);
418 /* set the encoded pentanomial */
419 char_two->parameters->type=V_ASN1_SEQUENCE;
420 char_two->parameters->value.sequence=ASN1_STRING_new();
421 ASN1_STRING_set(char_two->parameters->value.sequence,
422 buffer, buf_len);
423
424 OPENSSL_free(buffer);
425 buffer = NULL;
426 }
427 else /* field_type == NID_X9_62_onBasis */
428 {
429 /* for ONB the parameters are (asn1) NULL */
430 char_two->parameters->type = V_ASN1_NULL;
431 }
432 /* encoded the X9_62_CHARACTERISTIC_TWO structure */
433 buf_len = i2d_X9_62_CHARACTERISTIC_TWO(char_two, NULL);
434
435 if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
436 {
437 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
438 goto err;
439 }
440 pp = buffer;
441 i2d_X9_62_CHARACTERISTIC_TWO(char_two, &pp);
442 /* set the encoded parameters */
443 ret->parameters->type = V_ASN1_SEQUENCE;
444 ret->parameters->value.sequence = ASN1_STRING_new();
445 ASN1_STRING_set(ret->parameters->value.sequence,
446 buffer, buf_len);
447 }
012c86ab
BM		 448
449 ok = 1;
450
451err : if (!ok)
452 {
453 if (ret && !field)
454 X9_62_FIELDID_free(ret);
455 ret = NULL;
456 }
457 if (tmp)
458 BN_free(tmp);
7e31164a
BM		 459 if (char_two)
460 X9_62_CHARACTERISTIC_TWO_free(char_two);
461 if (penta)
462 X9_62_PENTANOMIAL_free(penta);
463 if (buffer)
464 OPENSSL_free(buffer);
012c86ab
BM		 465 return(ret);
466}
467
468static X9_62_CURVE *ec_asn1_group2curve(const EC_GROUP *group,
469 X9_62_CURVE *curve)
470 {
471 int ok=0, nid;
472 X9_62_CURVE *ret=NULL;
473 BIGNUM *tmp_1=NULL,
474 *tmp_2=NULL;
475 unsigned char *buffer_1=NULL,
476 *buffer_2=NULL,
477 *a_buf=NULL,
478 *b_buf=NULL;
479 size_t len_1, len_2;
480 unsigned char char_zero = 0;
481
482 if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL)
483 {
484 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
485 goto err;
486 }
487
488 if (curve == NULL)
489 {
490 if ((ret = X9_62_CURVE_new()) == NULL)
491 {
492 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
493 goto err;
494 }
495 }
496 else
497 {
498 ret = curve;
499 if (ret->a)
500 ASN1_OCTET_STRING_free(ret->a);
501 if (ret->b)
502 ASN1_OCTET_STRING_free(ret->b);
503 if (ret->seed)
504 ASN1_BIT_STRING_free(ret->seed);
505 }
506
507 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
508
509 /* get a and b */
510 if (nid == NID_X9_62_prime_field)
511 {
512 if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL))
513 {
514 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
515 goto err;
516 }
7e31164a
BM		 517 }
518 else /* nid == NID_X9_62_characteristic_two_field */
519 {
520 if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL))
521 {
522 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
523 goto err;
524 }
525 }
012c86ab 526
7e31164a
BM		 527 len_1 = (size_t)BN_num_bytes(tmp_1);
528 len_2 = (size_t)BN_num_bytes(tmp_2);
012c86ab 529
7e31164a
BM		 530 if (len_1 == 0)
531 {
532 /* len_1 == 0 => a == 0 */
533 a_buf = &char_zero;
534 len_1 = 1;
535 }
536 else
537 {
538 if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL)
012c86ab 539 {
7e31164a
BM		 540 ECerr(EC_F_EC_ASN1_GROUP2CURVE,
541 ERR_R_MALLOC_FAILURE);
542 goto err;
012c86ab 543 }
7e31164a 544 if ( (len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0)
012c86ab 545 {
7e31164a
BM		 546 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
547 goto err;
012c86ab 548 }
7e31164a
BM		 549 a_buf = buffer_1;
550 }
012c86ab 551
7e31164a
BM		 552 if (len_2 == 0)
553 {
554 /* len_2 == 0 => b == 0 */
555 b_buf = &char_zero;
556 len_2 = 1;
557 }
558 else
559 {
560 if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL)
012c86ab 561 {
7e31164a
BM		 562 ECerr(EC_F_EC_ASN1_GROUP2CURVE,
563 ERR_R_MALLOC_FAILURE);
564 goto err;
012c86ab 565 }
7e31164a 566 if ( (len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0)
012c86ab 567 {
7e31164a
BM		 568 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
569 goto err;
012c86ab 570 }
7e31164a 571 b_buf = buffer_2;
012c86ab 572 }
7e31164a 573
012c86ab
BM		 574 /* set a and b */
575 if ((ret->a = M_ASN1_OCTET_STRING_new()) == NULL ||
576 (ret->b = M_ASN1_OCTET_STRING_new()) == NULL )
577 {
578 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
579 goto err;
580 }
581 if (!M_ASN1_OCTET_STRING_set(ret->a, a_buf, len_1) ||
582 !M_ASN1_OCTET_STRING_set(ret->b, b_buf, len_2))
583 {
584 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
585 goto err;
586 }
587
588 /* set the seed (optional) */
589 if (group->seed)
590 {
591 if ((ret->seed = ASN1_BIT_STRING_new()) == NULL) goto err;
592 if (!ASN1_BIT_STRING_set(ret->seed, group->seed,
593 (int)group->seed_len))
594 {
595 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
596 goto err;
597 }
598 }
599 else
600 ret->seed = NULL;
601
602 ok = 1;
603
604err : if (!ok)
7e31164a 605 {
012c86ab
BM		 606 if (ret && !curve)
607 X9_62_CURVE_free(ret);
608 ret = NULL;
7e31164a 609 }
012c86ab
BM		 610 if (buffer_1)
611 OPENSSL_free(buffer_1);
612 if (buffer_2)
613 OPENSSL_free(buffer_2);
614 if (tmp_1)
615 BN_free(tmp_1);
616 if (tmp_2)
617 BN_free(tmp_2);
618 return(ret);
7e31164a 619 }
012c86ab
BM		 620
621static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group,
622 ECPARAMETERS *param)
623 {
254ef80d 624 int ok=0;
012c86ab
BM		 625 size_t len=0;
626 ECPARAMETERS *ret=NULL;
627 BIGNUM *tmp=NULL;
628 unsigned char *buffer=NULL;
629 const EC_POINT *point=NULL;
630 point_conversion_form_t form;
631
632 if ((tmp = BN_new()) == NULL)
633 {
634 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
635 goto err;
636 }
637
638 if (param == NULL)
639 {
640 if ((ret = ECPARAMETERS_new()) == NULL)
641 {
642 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS,
643 ERR_R_MALLOC_FAILURE);
644 goto err;
645 }
646 }
647 else
648 ret = param;
649
650 /* set the version (always one) */
7e31164a 651 ret->version = (long)0x1;
012c86ab
BM		 652
653 /* set the fieldID */
654 ret->fieldID = ec_asn1_group2field(group, ret->fieldID);
655 if (ret->fieldID == NULL)
656 {
657 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
658 goto err;
659 }
660
661 /* set the curve */
662 ret->curve = ec_asn1_group2curve(group, ret->curve);
663 if (ret->curve == NULL)
664 {
665 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
666 goto err;
667 }
668
669 /* set the base point */
670 if ((point = EC_GROUP_get0_generator(group)) == NULL)
671 {
672 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, EC_R_UNDEFINED_GENERATOR);
673 goto err;
674 }
675
254ef80d 676 form = EC_GROUP_get_point_conversion_form(group);
012c86ab
BM		 677
678 len = EC_POINT_point2oct(group, point, form, NULL, len, NULL);
679 if (len == 0)
680 {
681 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
682 goto err;
683 }
684 if ((buffer = OPENSSL_malloc(len)) == NULL)
685 {
686 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
687 goto err;
688 }
689 if (!EC_POINT_point2oct(group, point, form, buffer, len, NULL))
690 {
691 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
692 goto err;
693 }
694 if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL)
695 {
696 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
697 goto err;
698 }
699 if (!ASN1_OCTET_STRING_set(ret->base, buffer, len))
700 {
701 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
702 goto err;
703 }
704
705 /* set the order */
706 if (!EC_GROUP_get_order(group, tmp, NULL))
707 {
708 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
709 goto err;
710 }
711 ret->order = BN_to_ASN1_INTEGER(tmp, ret->order);
712 if (ret->order == NULL)
713 {
714 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
715 goto err;
716 }
717
82516e3b
BM		 718 /* set the cofactor (optional) */
719 if (EC_GROUP_get_cofactor(group, tmp, NULL))
012c86ab 720 {
82516e3b
BM		 721 ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor);
722 if (ret->cofactor == NULL)
723 {
724 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
725 goto err;
726 }
012c86ab
BM		 727 }
728
729 ok = 1;
730
731err : if(!ok)
732 {
733 if (ret && !param)
734 ECPARAMETERS_free(ret);
735 ret = NULL;
736 }
737 if (tmp)
738 BN_free(tmp);
739 if (buffer)
740 OPENSSL_free(buffer);
741 return(ret);
742 }
743
7e31164a 744ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *group,
012c86ab
BM		 745 ECPKPARAMETERS *params)
746 {
747 int ok = 1, tmp;
748 ECPKPARAMETERS *ret = params;
749
750 if (ret == NULL)
751 {
752 if ((ret = ECPKPARAMETERS_new()) == NULL)
753 {
754 ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS,
755 ERR_R_MALLOC_FAILURE);
756 return NULL;
757 }
758 }
759 else
760 {
761 if (ret->type == 0 && ret->value.named_curve)
762 ASN1_OBJECT_free(ret->value.named_curve);
763 else if (ret->type == 1 && ret->value.parameters)
764 ECPARAMETERS_free(ret->value.parameters);
765 }
766
254ef80d 767 if (EC_GROUP_get_asn1_flag(group))
012c86ab
BM		 768 {
769 /* use the asn1 OID to describe the
770 * the elliptic curve parameters
771 */
772 tmp = EC_GROUP_get_nid(group);
773 if (tmp)
774 {
775 ret->type = 0;
776 if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
777 ok = 0;
778 }
779 else
7e31164a
BM		 780 /* we don't kmow the nid => ERROR */
781 ok = 0;
012c86ab 782 }
254ef80d 783 else
012c86ab
BM		 784 {
785 /* use the ECPARAMETERS structure */
786 ret->type = 1;
787 if ((ret->value.parameters = ec_asn1_group2parameters(
788 group, NULL)) == NULL)
789 ok = 0;
790 }
012c86ab
BM		 791
792 if (!ok)
793 {
794 ECPKPARAMETERS_free(ret);
795 return NULL;
796 }
797 return ret;
798 }
799
800static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *params)
801 {
7e31164a
BM		 802 int ok = 0, tmp;
803 EC_GROUP *ret = NULL;
804 BIGNUM *p = NULL, *a = NULL, *b = NULL;
805 EC_POINT *point=NULL;
806 X9_62_CHARACTERISTIC_TWO *char_two = NULL;
807 X9_62_PENTANOMIAL *penta = NULL;
808 unsigned char *pp;
012c86ab
BM		 809
810 if (!params->fieldID || !params->fieldID->fieldType ||
811 !params->fieldID->parameters)
812 {
813 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
814 goto err;
815 }
816
7e31164a
BM		 817 /* now extract the curve parameters a and b */
818 if (!params->curve || !params->curve->a ||
819 !params->curve->a->data || !params->curve->b ||
820 !params->curve->b->data)
012c86ab 821 {
7e31164a 822 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
012c86ab
BM		 823 goto err;
824 }
7e31164a
BM		 825 a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL);
826 if (a == NULL)
012c86ab 827 {
7e31164a
BM		 828 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
829 goto err;
830 }
831 b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL);
832 if (b == NULL)
833 {
834 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
835 goto err;
836 }
837
838 /* get the field parameters */
839 tmp = OBJ_obj2nid(params->fieldID->fieldType);
840
841 if (tmp == NID_X9_62_characteristic_two_field)
842 {
843 ASN1_TYPE *parameters = params->fieldID->parameters;
844
845 if (parameters->type != V_ASN1_SEQUENCE)
012c86ab
BM		 846 {
847 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
848 goto err;
849 }
7e31164a
BM		 850
851 if ((p = BN_new()) == NULL)
852 {
853 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
854 ERR_R_MALLOC_FAILURE);
855 goto err;
856 }
857
858 /* extract the X9_62_CHARACTERISTIC_TWO object */
859 pp = M_ASN1_STRING_data(parameters->value.sequence);
860 char_two = d2i_X9_62_CHARACTERISTIC_TWO(NULL,
861 (const unsigned char **) &pp,
862 M_ASN1_STRING_length(parameters->value.sequence));
863 if (char_two == NULL)
012c86ab
BM		 864 {
865 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
866 goto err;
867 }
7e31164a
BM		 868 /* get the base type */
869 tmp = OBJ_obj2nid(char_two->basis);
870
871 if (tmp == NID_X9_62_tpBasis)
872 {
873 long tmp_long;
874
875 if (char_two->parameters->type != V_ASN1_INTEGER ||
876 char_two->parameters->value.integer == NULL)
877 {
878 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
879 EC_R_ASN1_ERROR);
880 goto err;
881 }
882
883 tmp_long = ASN1_INTEGER_get(char_two->parameters->value.integer);
884 /* create the polynomial */
885 if (!BN_set_bit(p, (int)char_two->m)) goto err;
886 if (!BN_set_bit(p, (int)tmp_long)) goto err;
887 if (!BN_set_bit(p, 0)) goto err;
888 }
889 else if (tmp == NID_X9_62_ppBasis)
890 {
891 if (char_two->parameters->type != V_ASN1_SEQUENCE ||
892 char_two->parameters->value.sequence == NULL)
893 {
894 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
895 EC_R_ASN1_ERROR);
896 goto err;
897 }
898 /* extract the pentanomial data */
899 pp = M_ASN1_STRING_data(
900 char_two->parameters->value.sequence);
901 penta = d2i_X9_62_PENTANOMIAL(NULL,
902 (const unsigned char **) &pp,
903 M_ASN1_STRING_length(
904 char_two->parameters->value.sequence));
905 if (penta == NULL)
906 {
907 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
908 ERR_R_ASN1_LIB);
909 goto err;
910 }
911 /* create the polynomial */
912 if (!BN_set_bit(p, (int)char_two->m)) goto err;
913 if (!BN_set_bit(p, (int)penta->k1)) goto err;
914 if (!BN_set_bit(p, (int)penta->k2)) goto err;
915 if (!BN_set_bit(p, (int)penta->k3)) goto err;
916 if (!BN_set_bit(p, 0)) goto err;
917 }
918 else if (tmp == NID_X9_62_onBasis)
919 {
920 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
921 EC_R_NOT_IMPLEMENTED);
922 goto err;
923 }
924 else /* error */
012c86ab
BM		 925 {
926 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
927 goto err;
928 }
7e31164a
BM		 929
930 /* create the EC_GROUP structure */
931 ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL);
932 if (ret == NULL)
012c86ab 933 {
7e31164a 934 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
012c86ab
BM		 935 goto err;
936 }
7e31164a
BM		 937 }
938 else if (tmp == NID_X9_62_prime_field)
939 {
940 /* we have a curve over a prime field */
941 /* extract the prime number */
942 if (params->fieldID->parameters->type != V_ASN1_INTEGER ||
943 !params->fieldID->parameters->value.integer)
012c86ab 944 {
7e31164a
BM		 945 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
946 goto err;
947 }
948 p = ASN1_INTEGER_to_BN(params->fieldID->parameters->value.integer, NULL);
949 if (p == NULL)
950 {
951 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
012c86ab
BM		 952 goto err;
953 }
954 /* create the EC_GROUP structure */
012c86ab
BM		 955 ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
956 if (ret == NULL)
957 {
958 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
959 goto err;
960 }
012c86ab
BM		 961 }
962
7e31164a 963 /* extract seed (optional) */
012c86ab
BM		 964 if (params->curve->seed != NULL)
965 {
966 if (ret->seed != NULL)
967 OPENSSL_free(ret->seed);
968 if (!(ret->seed = OPENSSL_malloc(params->curve->seed->length)))
969 {
970 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP,
971 ERR_R_MALLOC_FAILURE);
972 goto err;
973 }
974 memcpy(ret->seed, params->curve->seed->data,
975 params->curve->seed->length);
976 ret->seed_len = params->curve->seed->length;
977 }
978
82516e3b 979 if (!params->order || !params->base || !params->base->data)
012c86ab
BM		 980 {
981 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
982 goto err;
983 }
984
7e31164a 985 if ((point = EC_POINT_new(ret)) == NULL) goto err;
012c86ab 986
82516e3b
BM		 987 /* set the point conversion form */
988 EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t)
989 (params->base->data[0] & ~0x01));
012c86ab 990
82516e3b 991 /* extract the ec point */
012c86ab
BM		 992 if (!EC_POINT_oct2point(ret, point, params->base->data,
993 params->base->length, NULL))
994 {
995 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
996 goto err;
997 }
5dbd3efc 998
82516e3b
BM		 999 /* extract the order */
1000 if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL)
1001 {
1002 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
1003 goto err;
1004 }
1005
1006 /* extract the cofactor (optional) */
1007 if (params->cofactor == NULL)
1008 {
1009 if (b)
1010 {
1011 BN_free(b);
1012 b = NULL;
1013 }
1014 }
1015 else
1016 if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL)
1017 {
1018 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
1019 goto err;
1020 }
1021 /* set the generator, order and cofactor (if present) */
012c86ab
BM		 1022 if (!EC_GROUP_set_generator(ret, point, a, b))
1023 {
1024 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
1025 goto err;
1026 }
1027
1028 ok = 1;
1029
1030err: if (!ok)
1031 {
1032 if (ret)
1033 EC_GROUP_clear_free(ret);
1034 ret = NULL;
1035 }
1036
1037 if (p)
1038 BN_free(p);
1039 if (a)
1040 BN_free(a);
1041 if (b)
1042 BN_free(b);
1043 if (point)
1044 EC_POINT_free(point);
7e31164a
BM		 1045 if (char_two)
1046 X9_62_CHARACTERISTIC_TWO_free(char_two);
1047 if (penta)
1048 X9_62_PENTANOMIAL_free(penta);
012c86ab
BM		 1049 return(ret);
1050}
1051
7e31164a 1052EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *params)
012c86ab
BM		 1053 {
1054 EC_GROUP *ret=NULL;
1055 int tmp=0;
1056
1057 if (params == NULL)
1058 {
1059 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP,
1060 EC_R_MISSING_PARAMETERS);
1061 return NULL;
1062 }
1063
1064 if (params->type == 0)
1065 { /* the curve is given by an OID */
1066 tmp = OBJ_obj2nid(params->value.named_curve);
7eb18f12 1067 if ((ret = EC_GROUP_new_by_nid(tmp)) == NULL)
012c86ab
BM		 1068 {
1069 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP,
1070 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
1071 return NULL;
1072 }
254ef80d 1073 EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE);
012c86ab
BM		 1074 }
1075 else if (params->type == 1)
1076 { /* the parameters are given by a ECPARAMETERS
1077 * structure */
1078 ret = ec_asn1_parameters2group(params->value.parameters);
1079 if (!ret)
1080 {
1081 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, ERR_R_EC_LIB);
1082 return NULL;
1083 }
254ef80d 1084 EC_GROUP_set_asn1_flag(ret, 0x0);
012c86ab
BM		 1085 }
1086 else if (params->type == 2)
1087 { /* implicitlyCA */
1088 return NULL;
1089 }
1090 else
7e31164a 1091 {
012c86ab
BM		 1092 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
1093 return NULL;
7e31164a 1094 }
012c86ab
BM		 1095
1096 return ret;
7e31164a 1097 }
012c86ab 1098
14a7cfb3 1099/* EC_GROUP <-> DER encoding of ECPKPARAMETERS */
012c86ab
BM		 1100
1101EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len)
1102 {
1103 EC_GROUP *group = NULL;
1104 ECPKPARAMETERS *params = NULL;
1105
1106 if ((params = d2i_ECPKPARAMETERS(NULL, in, len)) == NULL)
1107 {
1108 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
1109 ECPKPARAMETERS_free(params);
1110 return NULL;
1111 }
1112
7e31164a 1113 if ((group = ec_asn1_pkparameters2group(params)) == NULL)
012c86ab
BM		 1114 {
1115 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
1116 return NULL;
1117 }
1118
1119
1120 if (a && *a)
1121 EC_GROUP_clear_free(*a);
1122 if (a)
1123 *a = group;
1124
1125 ECPKPARAMETERS_free(params);
1126 return(group);
1127 }
1128
14a7cfb3 1129int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out)
012c86ab
BM		 1130 {
1131 int ret=0;
7e31164a 1132 ECPKPARAMETERS *tmp = ec_asn1_group2pkparameters(a, NULL);
012c86ab
BM		 1133 if (tmp == NULL)
1134 {
14a7cfb3 1135 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE);
012c86ab
BM		 1136 return 0;
1137 }
14a7cfb3 1138 if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0)
012c86ab 1139 {
14a7cfb3
BM		 1140 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE);
1141 ECPKPARAMETERS_free(tmp);
012c86ab
BM		 1142 return 0;
1143 }
14a7cfb3 1144 ECPKPARAMETERS_free(tmp);
012c86ab
BM		 1145 return(ret);
1146 }
1147
14a7cfb3
BM		 1148/* some EC_KEY functions */
1149
1150EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len)
012c86ab 1151 {
14a7cfb3
BM		 1152 int ok=0;
1153 EC_KEY *ret=NULL;
1154 EC_PRIVATEKEY *priv_key=NULL;
1155
1156 if ((priv_key = EC_PRIVATEKEY_new()) == NULL)
012c86ab 1157 {
14a7cfb3
BM		 1158 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
1159 return NULL;
1160 }
1161
1162 if ((priv_key = d2i_EC_PRIVATEKEY(&priv_key, in, len)) == NULL)
1163 {
1164 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1165 EC_PRIVATEKEY_free(priv_key);
1166 return NULL;
1167 }
1168
1169 if (a == NULL || *a == NULL)
1170 {
1171 if ((ret = EC_KEY_new()) == NULL)
1172 {
1173 ECerr(EC_F_D2I_ECPRIVATEKEY,
1174 ERR_R_MALLOC_FAILURE);
1175 goto err;
1176 }
1177 if (a)
1178 *a = ret;
1179 }
1180 else
1181 ret = *a;
1182
1183 if (priv_key->parameters)
1184 {
1185 if (ret->group)
1186 EC_GROUP_clear_free(ret->group);
7e31164a 1187 ret->group = ec_asn1_pkparameters2group(priv_key->parameters);
14a7cfb3
BM		 1188 }
1189
1190 if (ret->group == NULL)
1191 {
1192 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1193 goto err;
1194 }
1195
1196 ret->version = priv_key->version;
1197
1198 if (priv_key->privateKey)
1199 {
1200 ret->priv_key = BN_bin2bn(
1201 M_ASN1_STRING_data(priv_key->privateKey),
1202 M_ASN1_STRING_length(priv_key->privateKey),
1203 ret->priv_key);
1204 if (ret->priv_key == NULL)
1205 {
1206 ECerr(EC_F_D2I_ECPRIVATEKEY,
1207 ERR_R_BN_LIB);
1208 goto err;
1209 }
1210 }
1211 else
1212 {
1213 ECerr(EC_F_D2I_ECPRIVATEKEY,
1214 EC_R_MISSING_PRIVATE_KEY);
1215 goto err;
1216 }
1217
1218 if (priv_key->publicKey)
1219 {
1220 if (ret->pub_key)
1221 EC_POINT_clear_free(ret->pub_key);
1222 ret->pub_key = EC_POINT_new(ret->group);
1223 if (ret->pub_key == NULL)
1224 {
1225 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1226 goto err;
1227 }
1228 if (!EC_POINT_oct2point(ret->group, ret->pub_key,
1229 M_ASN1_STRING_data(priv_key->publicKey),
1230 M_ASN1_STRING_length(priv_key->publicKey), NULL))
1231 {
1232 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB);
1233 goto err;
1234 }
1235 }
1236
1237 ok = 1;
1238err:
1239 if (!ok)
1240 {
1241 if (ret)
1242 EC_KEY_free(ret);
1243 ret = NULL;
1244 }
1245
1246 if (priv_key)
1247 EC_PRIVATEKEY_free(priv_key);
1248
1249 return(ret);
1250 }
1251
1252int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out)
1253 {
1254 int ret=0, ok=0;
1255 unsigned char *buffer=NULL;
1256 size_t buf_len=0, tmp_len;
1257 EC_PRIVATEKEY *priv_key=NULL;
1258
1259 if (a == NULL || a->group == NULL || a->priv_key == NULL)
1260 {
1261 ECerr(EC_F_I2D_ECPRIVATEKEY,
1262 ERR_R_PASSED_NULL_PARAMETER);
1263 goto err;
1264 }
1265
1266 if ((priv_key = EC_PRIVATEKEY_new()) == NULL)
1267 {
1268 ECerr(EC_F_I2D_ECPRIVATEKEY,
1269 ERR_R_MALLOC_FAILURE);
1270 goto err;
1271 }
1272
1273 priv_key->version = a->version;
1274
1275 buf_len = (size_t)BN_num_bytes(a->priv_key);
1276 buffer = OPENSSL_malloc(buf_len);
1277 if (buffer == NULL)
1278 {
1279 ECerr(EC_F_I2D_ECPRIVATEKEY,
1280 ERR_R_MALLOC_FAILURE);
1281 goto err;
1282 }
1283
1284 if (!BN_bn2bin(a->priv_key, buffer))
1285 {
1286 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_BN_LIB);
1287 goto err;
1288 }
1289
1290 if (!M_ASN1_OCTET_STRING_set(priv_key->privateKey, buffer, buf_len))
1291 {
1292 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
1293 goto err;
1294 }
1295
1296 if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS))
1297 {
7e31164a 1298 if ((priv_key->parameters = ec_asn1_group2pkparameters(
14a7cfb3
BM		 1299 a->group, priv_key->parameters)) == NULL)
1300 {
1301 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1302 goto err;
1303 }
1304 }
1305
1306 if (!(a->enc_flag & EC_PKEY_NO_PUBKEY))
1307 {
1308 priv_key->publicKey = M_ASN1_BIT_STRING_new();
1309 if (priv_key->publicKey == NULL)
1310 {
1311 ECerr(EC_F_I2D_ECPRIVATEKEY,
1312 ERR_R_MALLOC_FAILURE);
1313 goto err;
1314 }
1315
1316 tmp_len = EC_POINT_point2oct(a->group, a->pub_key,
1317 a->conv_form, NULL, 0, NULL);
1318
1319 if (tmp_len > buf_len)
1320 buffer = OPENSSL_realloc(buffer, tmp_len);
1321 if (buffer == NULL)
1322 {
1323 ECerr(EC_F_I2D_ECPRIVATEKEY,
1324 ERR_R_MALLOC_FAILURE);
1325 goto err;
1326 }
1327
1328 buf_len = tmp_len;
1329
1330 if (!EC_POINT_point2oct(a->group, a->pub_key,
1331 a->conv_form, buffer, buf_len, NULL))
1332 {
1333 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1334 goto err;
1335 }
1336
1337 if (!M_ASN1_BIT_STRING_set(priv_key->publicKey, buffer,
1338 buf_len))
1339 {
1340 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB);
1341 goto err;
1342 }
1343 }
1344
1345 if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0)
1346 {
1347 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB);
1348 goto err;
1349 }
1350 ok=1;
1351err:
1352 if (buffer)
1353 OPENSSL_free(buffer);
1354 if (priv_key)
1355 EC_PRIVATEKEY_free(priv_key);
1356 return(ok?ret:0);
1357 }
1358
1359int i2d_ECParameters(EC_KEY *a, unsigned char **out)
1360 {
1361 if (a == NULL)
1362 {
1363 ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
012c86ab
BM		 1364 return 0;
1365 }
14a7cfb3
BM		 1366 return i2d_ECPKParameters(a->group, out);
1367 }
1368
1369EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len)
1370 {
1371 EC_GROUP *group;
1372 EC_KEY *ret;
1373
1374 if (in == NULL || *in == NULL)
012c86ab 1375 {
14a7cfb3
BM		 1376 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER);
1377 return NULL;
1378 }
1379
1380 group = d2i_ECPKParameters(NULL, in, len);
1381
1382 if (group == NULL)
1383 {
1384 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
1385 return NULL;
1386 }
1387
1388 if (a == NULL || *a == NULL)
1389 {
1390 if ((ret = EC_KEY_new()) == NULL)
1391 {
1392 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
1393 return NULL;
1394 }
1395 if (a)
1396 *a = ret;
1397 }
1398 else
1399 ret = *a;
1400
1401 if (ret->group)
1402 EC_GROUP_clear_free(ret->group);
1403
1404 ret->group = group;
1405
1406 return ret;
1407 }
1408
1409EC_KEY *ECPublicKey_set_octet_string(EC_KEY **a, const unsigned char **in,
1410 long len)
1411 {
1412 EC_KEY *ret=NULL;
1413
1414 if (a == NULL || (*a) == NULL || (*a)->group == NULL)
1415 {
1416 /* sorry, but a EC_GROUP-structur is necessary
1417 * to set the public key */
1418 ECerr(EC_F_ECPUBLICKEY_SET_OCTET, ERR_R_PASSED_NULL_PARAMETER);
012c86ab 1419 return 0;
14a7cfb3
BM		 1420 }
1421 ret = *a;
1422 if (ret->pub_key == NULL &&
1423 (ret->pub_key = EC_POINT_new(ret->group)) == NULL)
1424 {
1425 ECerr(EC_F_ECPUBLICKEY_SET_OCTET, ERR_R_MALLOC_FAILURE);
1426 return 0;
1427 }
1428 if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL))
1429 {
1430 ECerr(EC_F_ECPUBLICKEY_SET_OCTET, ERR_R_EC_LIB);
1431 return 0;
1432 }
1433 /* save the point conversion form */
1434 ret->conv_form = (point_conversion_form_t)(*in[0] & ~0x01);
1435 return ret;
1436 }
1437
1438int ECPublicKey_get_octet_string(EC_KEY *a, unsigned char **out)
1439 {
1440 size_t buf_len=0;
1441
1442 if (a == NULL)
1443 {
1444 ECerr(EC_F_ECPUBLICKEY_GET_OCTET, ERR_R_PASSED_NULL_PARAMETER);
1445 return 0;
1446 }
1447
1448 buf_len = EC_POINT_point2oct(a->group, a->pub_key,
1449 a->conv_form, NULL, 0, NULL);
1450
1451 if (out == NULL || buf_len == 0)
1452 /* out == NULL => just return the length of the octet string */
1453 return buf_len;
1454
1455 if (*out == NULL)
1456 if ((*out = OPENSSL_malloc(buf_len)) == NULL)
1457 {
1458 ECerr(EC_F_ECPUBLICKEY_GET_OCTET,
1459 ERR_R_MALLOC_FAILURE);
1460 return 0;
1461 }
1462 if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form,
1463 *out, buf_len, NULL))
1464 {
1465 ECerr(EC_F_ECPUBLICKEY_GET_OCTET, ERR_R_EC_LIB);
1466 OPENSSL_free(*out);
1467 *out = NULL;
1468 return 0;
1469 }
1470 return buf_len;
012c86ab 1471 }
A mirror of the official openssl repository