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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 | 66 | int 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 |
87 | int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k) |
88 | { | |
89 | if (group == NULL) | |
90 | return 0; | |
91 | ||
92 | if (EC_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_set_curve | |
93 | || !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[2] == 0))) | |
94 | { | |
95 | ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
96 | return 0; | |
97 | } | |
98 | ||
99 | if (k) | |
100 | *k = group->poly[1]; | |
101 | ||
102 | return 1; | |
103 | } | |
104 | ||
105 | int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1, | |
106 | unsigned int *k2, unsigned int *k3) | |
107 | { | |
108 | if (group == NULL) | |
109 | return 0; | |
110 | ||
111 | if (EC_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_set_curve | |
112 | || !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[2] != 0) && (group->poly[3] != 0) && (group->poly[4] == 0))) | |
113 | { | |
114 | ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
115 | return 0; | |
116 | } | |
117 | ||
118 | if (k1) | |
119 | *k1 = group->poly[3]; | |
120 | if (k2) | |
121 | *k2 = group->poly[2]; | |
122 | if (k3) | |
123 | *k3 = group->poly[1]; | |
124 | ||
125 | return 1; | |
126 | } | |
127 | ||
8aefe253 BM |
128 | |
129 | ||
012c86ab BM |
130 | /* some structures needed for the asn1 encoding */ |
131 | typedef struct x9_62_fieldid_st { | |
132 | ASN1_OBJECT *fieldType; | |
133 | ASN1_TYPE *parameters; | |
134 | } X9_62_FIELDID; | |
135 | ||
136 | typedef 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 | ||
142 | typedef struct x9_62_pentanomial_st { | |
7e31164a BM |
143 | long k1; |
144 | long k2; | |
145 | long k3; | |
012c86ab BM |
146 | } X9_62_PENTANOMIAL; |
147 | ||
148 | typedef 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 | 154 | typedef 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 | |
163 | struct 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 */ |
173 | typedef 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 | ||
182 | ASN1_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 | ||
187 | DECLARE_ASN1_FUNCTIONS_const(X9_62_FIELDID) | |
188 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_FIELDID, X9_62_FIELDID) | |
189 | IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_FIELDID) | |
190 | ||
191 | ASN1_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 | ||
197 | DECLARE_ASN1_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO) | |
198 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO, X9_62_CHARACTERISTIC_TWO) | |
199 | IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO) | |
200 | ||
201 | ASN1_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 | ||
207 | DECLARE_ASN1_FUNCTIONS_const(X9_62_PENTANOMIAL) | |
208 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_PENTANOMIAL, X9_62_PENTANOMIAL) | |
209 | IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_PENTANOMIAL) | |
210 | ||
211 | ASN1_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 | ||
217 | DECLARE_ASN1_FUNCTIONS_const(X9_62_CURVE) | |
218 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_CURVE, X9_62_CURVE) | |
219 | IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_CURVE) | |
220 | ||
221 | ASN1_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 | ||
230 | DECLARE_ASN1_FUNCTIONS_const(ECPARAMETERS) | |
14a7cfb3 | 231 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPARAMETERS, ECPARAMETERS) |
012c86ab BM |
232 | IMPLEMENT_ASN1_FUNCTIONS_const(ECPARAMETERS) |
233 | ||
234 | ASN1_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 | ||
240 | DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS) | |
14a7cfb3 | 241 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS) |
012c86ab BM |
242 | IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS) |
243 | ||
0bee0e62 BM |
244 | ASN1_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 |
251 | DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY) |
252 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY) | |
0bee0e62 BM |
253 | IMPLEMENT_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 | 259 | static 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 | 262 | static 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 | 265 | static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *); |
7e31164a BM |
266 | /* ec_asn1_group2parameters() creates a ECPARAMETERS object from a |
267 | * EC_GROUP object */ | |
268 | static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *,ECPARAMETERS *); | |
269 | /* ec_asn1_pkparameters2group() creates a EC_GROUP object from a | |
270 | * ECPKPARAMETERS object */ | |
271 | static EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *); | |
272 | /* ec_asn1_group2pkparameters() creates a ECPKPARAMETERS object from a | |
273 | * EC_GROUP object */ | |
274 | static ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *, | |
275 | ECPKPARAMETERS *); | |
276 | ||
277 | ||
278 | /* the function definitions */ | |
012c86ab BM |
279 | |
280 | static 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 | ||
451 | err : 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 | ||
468 | static 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 | ||
604 | err : 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 | |
621 | static 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 | ||
731 | err : 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 | 744 | ECPKPARAMETERS *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 | ||
800 | static 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 | ||
1030 | err: 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 | 1052 | EC_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 | |
1101 | EC_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 | 1129 | int 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 | ||
1150 | EC_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; | |
1238 | err: | |
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 | ||
1252 | int 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; | |
1351 | err: | |
1352 | if (buffer) | |
1353 | OPENSSL_free(buffer); | |
1354 | if (priv_key) | |
1355 | EC_PRIVATEKEY_free(priv_key); | |
1356 | return(ok?ret:0); | |
1357 | } | |
1358 | ||
1359 | int 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 | ||
1369 | EC_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 | ||
62e3163b | 1409 | EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len) |
14a7cfb3 BM |
1410 | { |
1411 | EC_KEY *ret=NULL; | |
1412 | ||
1413 | if (a == NULL || (*a) == NULL || (*a)->group == NULL) | |
1414 | { | |
1415 | /* sorry, but a EC_GROUP-structur is necessary | |
1416 | * to set the public key */ | |
62e3163b | 1417 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); |
012c86ab | 1418 | return 0; |
14a7cfb3 BM |
1419 | } |
1420 | ret = *a; | |
1421 | if (ret->pub_key == NULL && | |
1422 | (ret->pub_key = EC_POINT_new(ret->group)) == NULL) | |
1423 | { | |
62e3163b | 1424 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); |
14a7cfb3 BM |
1425 | return 0; |
1426 | } | |
1427 | if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL)) | |
1428 | { | |
62e3163b | 1429 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB); |
14a7cfb3 BM |
1430 | return 0; |
1431 | } | |
1432 | /* save the point conversion form */ | |
1433 | ret->conv_form = (point_conversion_form_t)(*in[0] & ~0x01); | |
62e3163b | 1434 | *in += len; |
14a7cfb3 BM |
1435 | return ret; |
1436 | } | |
1437 | ||
62e3163b | 1438 | int i2o_ECPublicKey(EC_KEY *a, unsigned char **out) |
14a7cfb3 | 1439 | { |
f2aa055e BM |
1440 | size_t buf_len=0; |
1441 | int new_buffer = 0; | |
14a7cfb3 BM |
1442 | |
1443 | if (a == NULL) | |
1444 | { | |
62e3163b | 1445 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); |
14a7cfb3 BM |
1446 | return 0; |
1447 | } | |
1448 | ||
1449 | buf_len = EC_POINT_point2oct(a->group, a->pub_key, | |
1450 | a->conv_form, NULL, 0, NULL); | |
1451 | ||
1452 | if (out == NULL || buf_len == 0) | |
1453 | /* out == NULL => just return the length of the octet string */ | |
1454 | return buf_len; | |
1455 | ||
1456 | if (*out == NULL) | |
f2aa055e | 1457 | { |
14a7cfb3 BM |
1458 | if ((*out = OPENSSL_malloc(buf_len)) == NULL) |
1459 | { | |
62e3163b | 1460 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); |
14a7cfb3 BM |
1461 | return 0; |
1462 | } | |
f2aa055e BM |
1463 | new_buffer = 1; |
1464 | } | |
14a7cfb3 BM |
1465 | if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form, |
1466 | *out, buf_len, NULL)) | |
1467 | { | |
62e3163b | 1468 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB); |
14a7cfb3 BM |
1469 | OPENSSL_free(*out); |
1470 | *out = NULL; | |
1471 | return 0; | |
1472 | } | |
f2aa055e BM |
1473 | if (!new_buffer) |
1474 | *out += buf_len; | |
14a7cfb3 | 1475 | return buf_len; |
012c86ab | 1476 | } |