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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 | |
0f113f3e | 13 | * notice, this list of conditions and the following disclaimer. |
012c86ab BM |
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 | ||
34f1f2a8 | 65 | int EC_GROUP_get_basis_type(const EC_GROUP *group) |
0f113f3e MC |
66 | { |
67 | int i = 0; | |
68 | ||
69 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != | |
70 | NID_X9_62_characteristic_two_field) | |
71 | /* everything else is currently not supported */ | |
72 | return 0; | |
73 | ||
74 | while (group->poly[i] != 0) | |
75 | i++; | |
76 | ||
77 | if (i == 4) | |
78 | return NID_X9_62_ppBasis; | |
79 | else if (i == 2) | |
80 | return NID_X9_62_tpBasis; | |
81 | else | |
82 | /* everything else is currently not supported */ | |
83 | return 0; | |
84 | } | |
85 | ||
b3310161 | 86 | #ifndef OPENSSL_NO_EC2M |
34f1f2a8 | 87 | int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k) |
0f113f3e MC |
88 | { |
89 | if (group == NULL) | |
90 | return 0; | |
91 | ||
92 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != | |
93 | NID_X9_62_characteristic_two_field | |
94 | || !((group->poly[0] != 0) && (group->poly[1] != 0) | |
95 | && (group->poly[2] == 0))) { | |
96 | ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS, | |
97 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
98 | return 0; | |
99 | } | |
100 | ||
101 | if (k) | |
102 | *k = group->poly[1]; | |
103 | ||
104 | return 1; | |
105 | } | |
106 | ||
34f1f2a8 | 107 | int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1, |
0f113f3e MC |
108 | unsigned int *k2, unsigned int *k3) |
109 | { | |
110 | if (group == NULL) | |
111 | return 0; | |
112 | ||
113 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != | |
114 | NID_X9_62_characteristic_two_field | |
115 | || !((group->poly[0] != 0) && (group->poly[1] != 0) | |
116 | && (group->poly[2] != 0) && (group->poly[3] != 0) | |
117 | && (group->poly[4] == 0))) { | |
118 | ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS, | |
119 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
120 | return 0; | |
121 | } | |
122 | ||
123 | if (k1) | |
124 | *k1 = group->poly[3]; | |
125 | if (k2) | |
126 | *k2 = group->poly[2]; | |
127 | if (k3) | |
128 | *k3 = group->poly[1]; | |
129 | ||
130 | return 1; | |
131 | } | |
b3310161 | 132 | #endif |
8aefe253 | 133 | |
012c86ab | 134 | /* some structures needed for the asn1 encoding */ |
012c86ab | 135 | typedef struct x9_62_pentanomial_st { |
0f113f3e MC |
136 | long k1; |
137 | long k2; | |
138 | long k3; | |
139 | } X9_62_PENTANOMIAL; | |
012c86ab | 140 | |
37af03d3 | 141 | typedef struct x9_62_characteristic_two_st { |
0f113f3e MC |
142 | long m; |
143 | ASN1_OBJECT *type; | |
144 | union { | |
145 | char *ptr; | |
146 | /* NID_X9_62_onBasis */ | |
147 | ASN1_NULL *onBasis; | |
148 | /* NID_X9_62_tpBasis */ | |
149 | ASN1_INTEGER *tpBasis; | |
150 | /* NID_X9_62_ppBasis */ | |
151 | X9_62_PENTANOMIAL *ppBasis; | |
152 | /* anything else */ | |
153 | ASN1_TYPE *other; | |
154 | } p; | |
155 | } X9_62_CHARACTERISTIC_TWO; | |
37af03d3 GT |
156 | |
157 | typedef struct x9_62_fieldid_st { | |
0f113f3e MC |
158 | ASN1_OBJECT *fieldType; |
159 | union { | |
160 | char *ptr; | |
161 | /* NID_X9_62_prime_field */ | |
162 | ASN1_INTEGER *prime; | |
163 | /* NID_X9_62_characteristic_two_field */ | |
164 | X9_62_CHARACTERISTIC_TWO *char_two; | |
165 | /* anything else */ | |
166 | ASN1_TYPE *other; | |
167 | } p; | |
168 | } X9_62_FIELDID; | |
37af03d3 | 169 | |
012c86ab | 170 | typedef struct x9_62_curve_st { |
0f113f3e MC |
171 | ASN1_OCTET_STRING *a; |
172 | ASN1_OCTET_STRING *b; | |
173 | ASN1_BIT_STRING *seed; | |
174 | } X9_62_CURVE; | |
012c86ab | 175 | |
14a7cfb3 | 176 | typedef struct ec_parameters_st { |
0f113f3e MC |
177 | long version; |
178 | X9_62_FIELDID *fieldID; | |
179 | X9_62_CURVE *curve; | |
180 | ASN1_OCTET_STRING *base; | |
181 | ASN1_INTEGER *order; | |
182 | ASN1_INTEGER *cofactor; | |
183 | } ECPARAMETERS; | |
012c86ab BM |
184 | |
185 | struct ecpk_parameters_st { | |
0f113f3e MC |
186 | int type; |
187 | union { | |
188 | ASN1_OBJECT *named_curve; | |
189 | ECPARAMETERS *parameters; | |
190 | ASN1_NULL *implicitlyCA; | |
191 | } value; | |
192 | } /* ECPKPARAMETERS */ ; | |
012c86ab | 193 | |
14a7cfb3 BM |
194 | /* SEC1 ECPrivateKey */ |
195 | typedef struct ec_privatekey_st { | |
0f113f3e MC |
196 | long version; |
197 | ASN1_OCTET_STRING *privateKey; | |
198 | ECPKPARAMETERS *parameters; | |
199 | ASN1_BIT_STRING *publicKey; | |
200 | } EC_PRIVATEKEY; | |
14a7cfb3 | 201 | |
37af03d3 GT |
202 | /* the OpenSSL ASN.1 definitions */ |
203 | ASN1_SEQUENCE(X9_62_PENTANOMIAL) = { | |
0f113f3e MC |
204 | ASN1_SIMPLE(X9_62_PENTANOMIAL, k1, LONG), |
205 | ASN1_SIMPLE(X9_62_PENTANOMIAL, k2, LONG), | |
206 | ASN1_SIMPLE(X9_62_PENTANOMIAL, k3, LONG) | |
37af03d3 | 207 | } ASN1_SEQUENCE_END(X9_62_PENTANOMIAL) |
012c86ab | 208 | |
37af03d3 GT |
209 | DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL) |
210 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL) | |
211 | ||
212 | ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY); | |
012c86ab | 213 | |
37af03d3 | 214 | ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = { |
0f113f3e MC |
215 | ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)), |
216 | ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)), | |
217 | ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL)) | |
37af03d3 | 218 | } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL); |
012c86ab BM |
219 | |
220 | ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = { | |
0f113f3e MC |
221 | ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, LONG), |
222 | ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT), | |
223 | ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO) | |
012c86ab BM |
224 | } ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO) |
225 | ||
37af03d3 GT |
226 | DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO) |
227 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO) | |
012c86ab | 228 | |
37af03d3 GT |
229 | ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY); |
230 | ||
231 | ASN1_ADB(X9_62_FIELDID) = { | |
0f113f3e MC |
232 | ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)), |
233 | ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO)) | |
37af03d3 | 234 | } ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL); |
012c86ab | 235 | |
37af03d3 | 236 | ASN1_SEQUENCE(X9_62_FIELDID) = { |
0f113f3e MC |
237 | ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT), |
238 | ASN1_ADB_OBJECT(X9_62_FIELDID) | |
37af03d3 | 239 | } ASN1_SEQUENCE_END(X9_62_FIELDID) |
012c86ab BM |
240 | |
241 | ASN1_SEQUENCE(X9_62_CURVE) = { | |
0f113f3e MC |
242 | ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING), |
243 | ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING), | |
244 | ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING) | |
012c86ab BM |
245 | } ASN1_SEQUENCE_END(X9_62_CURVE) |
246 | ||
012c86ab | 247 | ASN1_SEQUENCE(ECPARAMETERS) = { |
0f113f3e MC |
248 | ASN1_SIMPLE(ECPARAMETERS, version, LONG), |
249 | ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID), | |
250 | ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE), | |
251 | ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING), | |
252 | ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER), | |
253 | ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER) | |
012c86ab BM |
254 | } ASN1_SEQUENCE_END(ECPARAMETERS) |
255 | ||
37af03d3 GT |
256 | DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) |
257 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) | |
012c86ab BM |
258 | |
259 | ASN1_CHOICE(ECPKPARAMETERS) = { | |
0f113f3e MC |
260 | ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT), |
261 | ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS), | |
262 | ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL) | |
012c86ab BM |
263 | } ASN1_CHOICE_END(ECPKPARAMETERS) |
264 | ||
265 | DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS) | |
14a7cfb3 | 266 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS) |
012c86ab BM |
267 | IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS) |
268 | ||
0bee0e62 | 269 | ASN1_SEQUENCE(EC_PRIVATEKEY) = { |
0f113f3e MC |
270 | ASN1_SIMPLE(EC_PRIVATEKEY, version, LONG), |
271 | ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING), | |
272 | ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0), | |
273 | ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1) | |
0bee0e62 BM |
274 | } ASN1_SEQUENCE_END(EC_PRIVATEKEY) |
275 | ||
14a7cfb3 BM |
276 | DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY) |
277 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY) | |
0bee0e62 BM |
278 | IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY) |
279 | ||
7e31164a | 280 | /* some declarations of internal function */ |
012c86ab | 281 | |
0f113f3e | 282 | /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */ |
37af03d3 | 283 | static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *); |
0f113f3e | 284 | /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */ |
37af03d3 | 285 | static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *); |
0f113f3e MC |
286 | /* |
287 | * ec_asn1_parameters2group() creates a EC_GROUP object from a ECPARAMETERS | |
288 | * object | |
289 | */ | |
290 | static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *); | |
291 | /* | |
292 | * ec_asn1_group2parameters() creates a ECPARAMETERS object from a EC_GROUP | |
293 | * object | |
294 | */ | |
295 | static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *, | |
296 | ECPARAMETERS *); | |
297 | /* | |
298 | * ec_asn1_pkparameters2group() creates a EC_GROUP object from a | |
299 | * ECPKPARAMETERS object | |
300 | */ | |
301 | static EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *); | |
302 | /* | |
303 | * ec_asn1_group2pkparameters() creates a ECPKPARAMETERS object from a | |
304 | * EC_GROUP object | |
305 | */ | |
306 | static ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *, | |
307 | ECPKPARAMETERS *); | |
7e31164a BM |
308 | |
309 | /* the function definitions */ | |
012c86ab | 310 | |
37af03d3 | 311 | static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field) |
0f113f3e MC |
312 | { |
313 | int ok = 0, nid; | |
314 | BIGNUM *tmp = NULL; | |
315 | ||
316 | if (group == NULL || field == NULL) | |
317 | return 0; | |
318 | ||
319 | /* clear the old values (if necessary) */ | |
320 | if (field->fieldType != NULL) | |
321 | ASN1_OBJECT_free(field->fieldType); | |
322 | if (field->p.other != NULL) | |
323 | ASN1_TYPE_free(field->p.other); | |
324 | ||
325 | nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group)); | |
326 | /* set OID for the field */ | |
327 | if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) { | |
328 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
329 | goto err; | |
330 | } | |
331 | ||
332 | if (nid == NID_X9_62_prime_field) { | |
333 | if ((tmp = BN_new()) == NULL) { | |
334 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
335 | goto err; | |
336 | } | |
337 | /* the parameters are specified by the prime number p */ | |
338 | if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL)) { | |
339 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); | |
340 | goto err; | |
341 | } | |
342 | /* set the prime number */ | |
343 | field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL); | |
344 | if (field->p.prime == NULL) { | |
345 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB); | |
346 | goto err; | |
347 | } | |
348 | } else /* nid == NID_X9_62_characteristic_two_field */ | |
b3310161 | 349 | #ifdef OPENSSL_NO_EC2M |
0f113f3e MC |
350 | { |
351 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED); | |
352 | goto err; | |
353 | } | |
b3310161 | 354 | #else |
0f113f3e MC |
355 | { |
356 | int field_type; | |
357 | X9_62_CHARACTERISTIC_TWO *char_two; | |
358 | ||
359 | field->p.char_two = X9_62_CHARACTERISTIC_TWO_new(); | |
360 | char_two = field->p.char_two; | |
361 | ||
362 | if (char_two == NULL) { | |
363 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
364 | goto err; | |
365 | } | |
366 | ||
367 | char_two->m = (long)EC_GROUP_get_degree(group); | |
368 | ||
369 | field_type = EC_GROUP_get_basis_type(group); | |
370 | ||
371 | if (field_type == 0) { | |
372 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); | |
373 | goto err; | |
374 | } | |
375 | /* set base type OID */ | |
376 | if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) { | |
377 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
378 | goto err; | |
379 | } | |
380 | ||
381 | if (field_type == NID_X9_62_tpBasis) { | |
382 | unsigned int k; | |
383 | ||
384 | if (!EC_GROUP_get_trinomial_basis(group, &k)) | |
385 | goto err; | |
386 | ||
387 | char_two->p.tpBasis = ASN1_INTEGER_new(); | |
388 | if (!char_two->p.tpBasis) { | |
389 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
390 | goto err; | |
391 | } | |
392 | if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) { | |
393 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB); | |
394 | goto err; | |
395 | } | |
396 | } else if (field_type == NID_X9_62_ppBasis) { | |
397 | unsigned int k1, k2, k3; | |
398 | ||
399 | if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3)) | |
400 | goto err; | |
401 | ||
402 | char_two->p.ppBasis = X9_62_PENTANOMIAL_new(); | |
403 | if (!char_two->p.ppBasis) { | |
404 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
405 | goto err; | |
406 | } | |
407 | ||
408 | /* set k? values */ | |
409 | char_two->p.ppBasis->k1 = (long)k1; | |
410 | char_two->p.ppBasis->k2 = (long)k2; | |
411 | char_two->p.ppBasis->k3 = (long)k3; | |
412 | } else { /* field_type == NID_X9_62_onBasis */ | |
413 | ||
414 | /* for ONB the parameters are (asn1) NULL */ | |
415 | char_two->p.onBasis = ASN1_NULL_new(); | |
416 | if (!char_two->p.onBasis) { | |
417 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
418 | goto err; | |
419 | } | |
420 | } | |
421 | } | |
b3310161 | 422 | #endif |
012c86ab | 423 | |
0f113f3e | 424 | ok = 1; |
012c86ab | 425 | |
0f113f3e MC |
426 | err:if (tmp) |
427 | BN_free(tmp); | |
428 | return (ok); | |
012c86ab BM |
429 | } |
430 | ||
37af03d3 | 431 | static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve) |
0f113f3e MC |
432 | { |
433 | int ok = 0, nid; | |
434 | BIGNUM *tmp_1 = NULL, *tmp_2 = NULL; | |
435 | unsigned char *buffer_1 = NULL, *buffer_2 = NULL, | |
436 | *a_buf = NULL, *b_buf = NULL; | |
437 | size_t len_1, len_2; | |
438 | unsigned char char_zero = 0; | |
439 | ||
440 | if (!group || !curve || !curve->a || !curve->b) | |
441 | return 0; | |
442 | ||
443 | if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) { | |
444 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
445 | goto err; | |
446 | } | |
447 | ||
448 | nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group)); | |
449 | ||
450 | /* get a and b */ | |
451 | if (nid == NID_X9_62_prime_field) { | |
452 | if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL)) { | |
453 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB); | |
454 | goto err; | |
455 | } | |
456 | } | |
b3310161 | 457 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
458 | else { /* nid == NID_X9_62_characteristic_two_field */ |
459 | ||
460 | if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL)) { | |
461 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB); | |
462 | goto err; | |
463 | } | |
464 | } | |
b3310161 | 465 | #endif |
0f113f3e MC |
466 | len_1 = (size_t)BN_num_bytes(tmp_1); |
467 | len_2 = (size_t)BN_num_bytes(tmp_2); | |
468 | ||
469 | if (len_1 == 0) { | |
470 | /* len_1 == 0 => a == 0 */ | |
471 | a_buf = &char_zero; | |
472 | len_1 = 1; | |
473 | } else { | |
474 | if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL) { | |
475 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
476 | goto err; | |
477 | } | |
478 | if ((len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0) { | |
479 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB); | |
480 | goto err; | |
481 | } | |
482 | a_buf = buffer_1; | |
483 | } | |
484 | ||
485 | if (len_2 == 0) { | |
486 | /* len_2 == 0 => b == 0 */ | |
487 | b_buf = &char_zero; | |
488 | len_2 = 1; | |
489 | } else { | |
490 | if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL) { | |
491 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
492 | goto err; | |
493 | } | |
494 | if ((len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0) { | |
495 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB); | |
496 | goto err; | |
497 | } | |
498 | b_buf = buffer_2; | |
499 | } | |
500 | ||
501 | /* set a and b */ | |
502 | if (!M_ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) || | |
503 | !M_ASN1_OCTET_STRING_set(curve->b, b_buf, len_2)) { | |
504 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); | |
505 | goto err; | |
506 | } | |
507 | ||
508 | /* set the seed (optional) */ | |
509 | if (group->seed) { | |
510 | if (!curve->seed) | |
511 | if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) { | |
512 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
513 | goto err; | |
514 | } | |
515 | curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
516 | curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
517 | if (!ASN1_BIT_STRING_set(curve->seed, group->seed, | |
518 | (int)group->seed_len)) { | |
519 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); | |
520 | goto err; | |
521 | } | |
522 | } else { | |
523 | if (curve->seed) { | |
524 | ASN1_BIT_STRING_free(curve->seed); | |
525 | curve->seed = NULL; | |
526 | } | |
527 | } | |
528 | ||
529 | ok = 1; | |
530 | ||
531 | err:if (buffer_1) | |
532 | OPENSSL_free(buffer_1); | |
533 | if (buffer_2) | |
534 | OPENSSL_free(buffer_2); | |
535 | if (tmp_1) | |
536 | BN_free(tmp_1); | |
537 | if (tmp_2) | |
538 | BN_free(tmp_2); | |
539 | return (ok); | |
540 | } | |
012c86ab BM |
541 | |
542 | static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group, | |
543 | ECPARAMETERS *param) | |
0f113f3e MC |
544 | { |
545 | int ok = 0; | |
546 | size_t len = 0; | |
547 | ECPARAMETERS *ret = NULL; | |
548 | BIGNUM *tmp = NULL; | |
549 | unsigned char *buffer = NULL; | |
550 | const EC_POINT *point = NULL; | |
551 | point_conversion_form_t form; | |
552 | ||
553 | if ((tmp = BN_new()) == NULL) { | |
554 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
555 | goto err; | |
556 | } | |
557 | ||
558 | if (param == NULL) { | |
559 | if ((ret = ECPARAMETERS_new()) == NULL) { | |
560 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
561 | goto err; | |
562 | } | |
563 | } else | |
564 | ret = param; | |
565 | ||
566 | /* set the version (always one) */ | |
567 | ret->version = (long)0x1; | |
568 | ||
569 | /* set the fieldID */ | |
570 | if (!ec_asn1_group2fieldid(group, ret->fieldID)) { | |
571 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
572 | goto err; | |
573 | } | |
574 | ||
575 | /* set the curve */ | |
576 | if (!ec_asn1_group2curve(group, ret->curve)) { | |
577 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
578 | goto err; | |
579 | } | |
580 | ||
581 | /* set the base point */ | |
582 | if ((point = EC_GROUP_get0_generator(group)) == NULL) { | |
583 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, EC_R_UNDEFINED_GENERATOR); | |
584 | goto err; | |
585 | } | |
586 | ||
587 | form = EC_GROUP_get_point_conversion_form(group); | |
588 | ||
589 | len = EC_POINT_point2oct(group, point, form, NULL, len, NULL); | |
590 | if (len == 0) { | |
591 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
592 | goto err; | |
593 | } | |
594 | if ((buffer = OPENSSL_malloc(len)) == NULL) { | |
595 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
596 | goto err; | |
597 | } | |
598 | if (!EC_POINT_point2oct(group, point, form, buffer, len, NULL)) { | |
599 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
600 | goto err; | |
601 | } | |
602 | if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) { | |
603 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
604 | goto err; | |
605 | } | |
606 | if (!ASN1_OCTET_STRING_set(ret->base, buffer, len)) { | |
607 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
608 | goto err; | |
609 | } | |
610 | ||
611 | /* set the order */ | |
612 | if (!EC_GROUP_get_order(group, tmp, NULL)) { | |
613 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
614 | goto err; | |
615 | } | |
616 | ret->order = BN_to_ASN1_INTEGER(tmp, ret->order); | |
617 | if (ret->order == NULL) { | |
618 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
619 | goto err; | |
620 | } | |
621 | ||
622 | /* set the cofactor (optional) */ | |
623 | if (EC_GROUP_get_cofactor(group, tmp, NULL)) { | |
624 | ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor); | |
625 | if (ret->cofactor == NULL) { | |
626 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
627 | goto err; | |
628 | } | |
629 | } | |
630 | ||
631 | ok = 1; | |
632 | ||
633 | err:if (!ok) { | |
634 | if (ret && !param) | |
635 | ECPARAMETERS_free(ret); | |
636 | ret = NULL; | |
637 | } | |
638 | if (tmp) | |
639 | BN_free(tmp); | |
640 | if (buffer) | |
641 | OPENSSL_free(buffer); | |
642 | return (ret); | |
643 | } | |
644 | ||
645 | ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *group, | |
012c86ab | 646 | ECPKPARAMETERS *params) |
0f113f3e MC |
647 | { |
648 | int ok = 1, tmp; | |
649 | ECPKPARAMETERS *ret = params; | |
650 | ||
651 | if (ret == NULL) { | |
652 | if ((ret = ECPKPARAMETERS_new()) == NULL) { | |
653 | ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS, ERR_R_MALLOC_FAILURE); | |
654 | return NULL; | |
655 | } | |
656 | } else { | |
657 | if (ret->type == 0 && ret->value.named_curve) | |
658 | ASN1_OBJECT_free(ret->value.named_curve); | |
659 | else if (ret->type == 1 && ret->value.parameters) | |
660 | ECPARAMETERS_free(ret->value.parameters); | |
661 | } | |
662 | ||
663 | if (EC_GROUP_get_asn1_flag(group)) { | |
664 | /* | |
665 | * use the asn1 OID to describe the the elliptic curve parameters | |
666 | */ | |
667 | tmp = EC_GROUP_get_curve_name(group); | |
668 | if (tmp) { | |
669 | ret->type = 0; | |
670 | if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL) | |
671 | ok = 0; | |
672 | } else | |
673 | /* we don't kmow the nid => ERROR */ | |
674 | ok = 0; | |
675 | } else { | |
676 | /* use the ECPARAMETERS structure */ | |
677 | ret->type = 1; | |
678 | if ((ret->value.parameters = | |
679 | ec_asn1_group2parameters(group, NULL)) == NULL) | |
680 | ok = 0; | |
681 | } | |
682 | ||
683 | if (!ok) { | |
684 | ECPKPARAMETERS_free(ret); | |
685 | return NULL; | |
686 | } | |
687 | return ret; | |
688 | } | |
012c86ab BM |
689 | |
690 | static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *params) | |
0f113f3e MC |
691 | { |
692 | int ok = 0, tmp; | |
693 | EC_GROUP *ret = NULL; | |
694 | BIGNUM *p = NULL, *a = NULL, *b = NULL; | |
695 | EC_POINT *point = NULL; | |
696 | long field_bits; | |
697 | ||
698 | if (!params->fieldID || !params->fieldID->fieldType || | |
699 | !params->fieldID->p.ptr) { | |
700 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
701 | goto err; | |
702 | } | |
703 | ||
704 | /* now extract the curve parameters a and b */ | |
705 | if (!params->curve || !params->curve->a || | |
706 | !params->curve->a->data || !params->curve->b || | |
707 | !params->curve->b->data) { | |
708 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
709 | goto err; | |
710 | } | |
711 | a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL); | |
712 | if (a == NULL) { | |
713 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB); | |
714 | goto err; | |
715 | } | |
716 | b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL); | |
717 | if (b == NULL) { | |
718 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB); | |
719 | goto err; | |
720 | } | |
721 | ||
722 | /* get the field parameters */ | |
723 | tmp = OBJ_obj2nid(params->fieldID->fieldType); | |
724 | if (tmp == NID_X9_62_characteristic_two_field) | |
b3310161 | 725 | #ifdef OPENSSL_NO_EC2M |
0f113f3e MC |
726 | { |
727 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_GF2M_NOT_SUPPORTED); | |
728 | goto err; | |
729 | } | |
b3310161 | 730 | #else |
0f113f3e MC |
731 | { |
732 | X9_62_CHARACTERISTIC_TWO *char_two; | |
733 | ||
734 | char_two = params->fieldID->p.char_two; | |
735 | ||
736 | field_bits = char_two->m; | |
737 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
738 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE); | |
739 | goto err; | |
740 | } | |
741 | ||
742 | if ((p = BN_new()) == NULL) { | |
743 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE); | |
744 | goto err; | |
745 | } | |
746 | ||
747 | /* get the base type */ | |
748 | tmp = OBJ_obj2nid(char_two->type); | |
749 | ||
750 | if (tmp == NID_X9_62_tpBasis) { | |
751 | long tmp_long; | |
752 | ||
753 | if (!char_two->p.tpBasis) { | |
754 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
755 | goto err; | |
756 | } | |
757 | ||
758 | tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis); | |
759 | ||
760 | if (!(char_two->m > tmp_long && tmp_long > 0)) { | |
761 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, | |
762 | EC_R_INVALID_TRINOMIAL_BASIS); | |
763 | goto err; | |
764 | } | |
765 | ||
766 | /* create the polynomial */ | |
767 | if (!BN_set_bit(p, (int)char_two->m)) | |
768 | goto err; | |
769 | if (!BN_set_bit(p, (int)tmp_long)) | |
770 | goto err; | |
771 | if (!BN_set_bit(p, 0)) | |
772 | goto err; | |
773 | } else if (tmp == NID_X9_62_ppBasis) { | |
774 | X9_62_PENTANOMIAL *penta; | |
775 | ||
776 | penta = char_two->p.ppBasis; | |
777 | if (!penta) { | |
778 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
779 | goto err; | |
780 | } | |
781 | ||
782 | if (! | |
783 | (char_two->m > penta->k3 && penta->k3 > penta->k2 | |
784 | && penta->k2 > penta->k1 && penta->k1 > 0)) { | |
785 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, | |
786 | EC_R_INVALID_PENTANOMIAL_BASIS); | |
787 | goto err; | |
788 | } | |
789 | ||
790 | /* create the polynomial */ | |
791 | if (!BN_set_bit(p, (int)char_two->m)) | |
792 | goto err; | |
793 | if (!BN_set_bit(p, (int)penta->k1)) | |
794 | goto err; | |
795 | if (!BN_set_bit(p, (int)penta->k2)) | |
796 | goto err; | |
797 | if (!BN_set_bit(p, (int)penta->k3)) | |
798 | goto err; | |
799 | if (!BN_set_bit(p, 0)) | |
800 | goto err; | |
801 | } else if (tmp == NID_X9_62_onBasis) { | |
802 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_NOT_IMPLEMENTED); | |
803 | goto err; | |
804 | } else { /* error */ | |
805 | ||
806 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
807 | goto err; | |
808 | } | |
809 | ||
810 | /* create the EC_GROUP structure */ | |
811 | ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL); | |
812 | } | |
b3310161 | 813 | #endif |
0f113f3e MC |
814 | else if (tmp == NID_X9_62_prime_field) { |
815 | /* we have a curve over a prime field */ | |
816 | /* extract the prime number */ | |
817 | if (!params->fieldID->p.prime) { | |
818 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
819 | goto err; | |
820 | } | |
821 | p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL); | |
822 | if (p == NULL) { | |
823 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
824 | goto err; | |
825 | } | |
826 | ||
827 | if (BN_is_negative(p) || BN_is_zero(p)) { | |
828 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD); | |
829 | goto err; | |
830 | } | |
831 | ||
832 | field_bits = BN_num_bits(p); | |
833 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
834 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE); | |
835 | goto err; | |
836 | } | |
837 | ||
838 | /* create the EC_GROUP structure */ | |
839 | ret = EC_GROUP_new_curve_GFp(p, a, b, NULL); | |
840 | } else { | |
841 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD); | |
842 | goto err; | |
843 | } | |
844 | ||
845 | if (ret == NULL) { | |
846 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
847 | goto err; | |
848 | } | |
849 | ||
850 | /* extract seed (optional) */ | |
851 | if (params->curve->seed != NULL) { | |
852 | if (ret->seed != NULL) | |
853 | OPENSSL_free(ret->seed); | |
854 | if (!(ret->seed = OPENSSL_malloc(params->curve->seed->length))) { | |
855 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE); | |
856 | goto err; | |
857 | } | |
858 | memcpy(ret->seed, params->curve->seed->data, | |
859 | params->curve->seed->length); | |
860 | ret->seed_len = params->curve->seed->length; | |
861 | } | |
862 | ||
863 | if (!params->order || !params->base || !params->base->data) { | |
864 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
865 | goto err; | |
866 | } | |
867 | ||
868 | if ((point = EC_POINT_new(ret)) == NULL) | |
869 | goto err; | |
870 | ||
871 | /* set the point conversion form */ | |
872 | EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t) | |
873 | (params->base->data[0] & ~0x01)); | |
874 | ||
875 | /* extract the ec point */ | |
876 | if (!EC_POINT_oct2point(ret, point, params->base->data, | |
877 | params->base->length, NULL)) { | |
878 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
879 | goto err; | |
880 | } | |
881 | ||
882 | /* extract the order */ | |
883 | if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) { | |
884 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
885 | goto err; | |
886 | } | |
887 | if (BN_is_negative(a) || BN_is_zero(a)) { | |
888 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER); | |
889 | goto err; | |
890 | } | |
891 | if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */ | |
892 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER); | |
893 | goto err; | |
894 | } | |
895 | ||
896 | /* extract the cofactor (optional) */ | |
897 | if (params->cofactor == NULL) { | |
898 | if (b) { | |
899 | BN_free(b); | |
900 | b = NULL; | |
901 | } | |
902 | } else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) { | |
903 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
904 | goto err; | |
905 | } | |
906 | /* set the generator, order and cofactor (if present) */ | |
907 | if (!EC_GROUP_set_generator(ret, point, a, b)) { | |
908 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
909 | goto err; | |
910 | } | |
911 | ||
912 | ok = 1; | |
913 | ||
914 | err:if (!ok) { | |
915 | if (ret) | |
916 | EC_GROUP_clear_free(ret); | |
917 | ret = NULL; | |
918 | } | |
919 | ||
920 | if (p) | |
921 | BN_free(p); | |
922 | if (a) | |
923 | BN_free(a); | |
924 | if (b) | |
925 | BN_free(b); | |
926 | if (point) | |
927 | EC_POINT_free(point); | |
928 | return (ret); | |
012c86ab BM |
929 | } |
930 | ||
7e31164a | 931 | EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *params) |
0f113f3e MC |
932 | { |
933 | EC_GROUP *ret = NULL; | |
934 | int tmp = 0; | |
935 | ||
936 | if (params == NULL) { | |
937 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_MISSING_PARAMETERS); | |
938 | return NULL; | |
939 | } | |
940 | ||
941 | if (params->type == 0) { /* the curve is given by an OID */ | |
942 | tmp = OBJ_obj2nid(params->value.named_curve); | |
943 | if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) { | |
944 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, | |
945 | EC_R_EC_GROUP_NEW_BY_NAME_FAILURE); | |
946 | return NULL; | |
947 | } | |
948 | EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE); | |
949 | } else if (params->type == 1) { /* the parameters are given by a | |
950 | * ECPARAMETERS structure */ | |
951 | ret = ec_asn1_parameters2group(params->value.parameters); | |
952 | if (!ret) { | |
953 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, ERR_R_EC_LIB); | |
954 | return NULL; | |
955 | } | |
956 | EC_GROUP_set_asn1_flag(ret, 0x0); | |
957 | } else if (params->type == 2) { /* implicitlyCA */ | |
958 | return NULL; | |
959 | } else { | |
960 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
961 | return NULL; | |
962 | } | |
963 | ||
964 | return ret; | |
965 | } | |
012c86ab | 966 | |
14a7cfb3 | 967 | /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */ |
012c86ab | 968 | |
6343829a | 969 | EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len) |
0f113f3e MC |
970 | { |
971 | EC_GROUP *group = NULL; | |
972 | ECPKPARAMETERS *params = NULL; | |
973 | ||
974 | if ((params = d2i_ECPKPARAMETERS(NULL, in, len)) == NULL) { | |
975 | ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE); | |
976 | ECPKPARAMETERS_free(params); | |
977 | return NULL; | |
978 | } | |
979 | ||
980 | if ((group = ec_asn1_pkparameters2group(params)) == NULL) { | |
981 | ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE); | |
982 | ECPKPARAMETERS_free(params); | |
983 | return NULL; | |
984 | } | |
985 | ||
986 | if (a && *a) | |
987 | EC_GROUP_clear_free(*a); | |
988 | if (a) | |
989 | *a = group; | |
990 | ||
991 | ECPKPARAMETERS_free(params); | |
992 | return (group); | |
993 | } | |
012c86ab | 994 | |
14a7cfb3 | 995 | int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out) |
0f113f3e MC |
996 | { |
997 | int ret = 0; | |
998 | ECPKPARAMETERS *tmp = ec_asn1_group2pkparameters(a, NULL); | |
999 | if (tmp == NULL) { | |
1000 | ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE); | |
1001 | return 0; | |
1002 | } | |
1003 | if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) { | |
1004 | ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE); | |
1005 | ECPKPARAMETERS_free(tmp); | |
1006 | return 0; | |
1007 | } | |
1008 | ECPKPARAMETERS_free(tmp); | |
1009 | return (ret); | |
1010 | } | |
012c86ab | 1011 | |
14a7cfb3 BM |
1012 | /* some EC_KEY functions */ |
1013 | ||
6343829a | 1014 | EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len) |
0f113f3e MC |
1015 | { |
1016 | int ok = 0; | |
1017 | EC_KEY *ret = NULL; | |
1018 | EC_PRIVATEKEY *priv_key = NULL; | |
1019 | ||
1020 | if ((priv_key = EC_PRIVATEKEY_new()) == NULL) { | |
1021 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1022 | return NULL; | |
1023 | } | |
1024 | ||
1025 | if ((priv_key = d2i_EC_PRIVATEKEY(&priv_key, in, len)) == NULL) { | |
1026 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1027 | EC_PRIVATEKEY_free(priv_key); | |
1028 | return NULL; | |
1029 | } | |
1030 | ||
1031 | if (a == NULL || *a == NULL) { | |
1032 | if ((ret = EC_KEY_new()) == NULL) { | |
1033 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1034 | goto err; | |
1035 | } | |
1036 | if (a) | |
1037 | *a = ret; | |
1038 | } else | |
1039 | ret = *a; | |
1040 | ||
1041 | if (priv_key->parameters) { | |
1042 | if (ret->group) | |
1043 | EC_GROUP_clear_free(ret->group); | |
1044 | ret->group = ec_asn1_pkparameters2group(priv_key->parameters); | |
1045 | } | |
1046 | ||
1047 | if (ret->group == NULL) { | |
1048 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1049 | goto err; | |
1050 | } | |
1051 | ||
1052 | ret->version = priv_key->version; | |
1053 | ||
1054 | if (priv_key->privateKey) { | |
1055 | ret->priv_key = BN_bin2bn(M_ASN1_STRING_data(priv_key->privateKey), | |
1056 | M_ASN1_STRING_length(priv_key->privateKey), | |
1057 | ret->priv_key); | |
1058 | if (ret->priv_key == NULL) { | |
1059 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_BN_LIB); | |
1060 | goto err; | |
1061 | } | |
1062 | } else { | |
1063 | ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY); | |
1064 | goto err; | |
1065 | } | |
1066 | ||
1067 | if (ret->pub_key) | |
1068 | EC_POINT_clear_free(ret->pub_key); | |
1069 | ret->pub_key = EC_POINT_new(ret->group); | |
1070 | if (ret->pub_key == NULL) { | |
1071 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1072 | goto err; | |
1073 | } | |
1074 | ||
1075 | if (priv_key->publicKey) { | |
1076 | const unsigned char *pub_oct; | |
1077 | int pub_oct_len; | |
1078 | ||
1079 | pub_oct = M_ASN1_STRING_data(priv_key->publicKey); | |
1080 | pub_oct_len = M_ASN1_STRING_length(priv_key->publicKey); | |
1081 | /* | |
1082 | * The first byte - point conversion form - must be present. | |
1083 | */ | |
1084 | if (pub_oct_len <= 0) { | |
1085 | ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_BUFFER_TOO_SMALL); | |
1086 | goto err; | |
1087 | } | |
1088 | /* Save the point conversion form. */ | |
1089 | ret->conv_form = (point_conversion_form_t) (pub_oct[0] & ~0x01); | |
1090 | if (!EC_POINT_oct2point(ret->group, ret->pub_key, | |
1091 | pub_oct, (size_t)(pub_oct_len), NULL)) { | |
1092 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1093 | goto err; | |
1094 | } | |
1095 | } else { | |
1096 | if (!EC_POINT_mul | |
1097 | (ret->group, ret->pub_key, ret->priv_key, NULL, NULL, NULL)) { | |
1098 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1099 | goto err; | |
1100 | } | |
1101 | /* Remember the original private-key-only encoding. */ | |
1102 | ret->enc_flag |= EC_PKEY_NO_PUBKEY; | |
1103 | } | |
1104 | ||
1105 | ok = 1; | |
1106 | err: | |
1107 | if (!ok) { | |
1108 | if (ret) | |
1109 | EC_KEY_free(ret); | |
1110 | ret = NULL; | |
1111 | } | |
1112 | ||
1113 | if (priv_key) | |
1114 | EC_PRIVATEKEY_free(priv_key); | |
1115 | ||
1116 | return (ret); | |
1117 | } | |
1118 | ||
1119 | int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out) | |
1120 | { | |
1121 | int ret = 0, ok = 0; | |
1122 | unsigned char *buffer = NULL; | |
1123 | size_t buf_len = 0, tmp_len; | |
1124 | EC_PRIVATEKEY *priv_key = NULL; | |
1125 | ||
1126 | if (a == NULL || a->group == NULL || a->priv_key == NULL || | |
1127 | (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) { | |
1128 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1129 | goto err; | |
1130 | } | |
1131 | ||
1132 | if ((priv_key = EC_PRIVATEKEY_new()) == NULL) { | |
1133 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1134 | goto err; | |
1135 | } | |
1136 | ||
1137 | priv_key->version = a->version; | |
1138 | ||
1139 | buf_len = (size_t)BN_num_bytes(a->priv_key); | |
1140 | buffer = OPENSSL_malloc(buf_len); | |
1141 | if (buffer == NULL) { | |
1142 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1143 | goto err; | |
1144 | } | |
1145 | ||
1146 | if (!BN_bn2bin(a->priv_key, buffer)) { | |
1147 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_BN_LIB); | |
1148 | goto err; | |
1149 | } | |
1150 | ||
1151 | if (!M_ASN1_OCTET_STRING_set(priv_key->privateKey, buffer, buf_len)) { | |
1152 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB); | |
1153 | goto err; | |
1154 | } | |
1155 | ||
1156 | if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) { | |
1157 | if ((priv_key->parameters = | |
1158 | ec_asn1_group2pkparameters(a->group, | |
1159 | priv_key->parameters)) == NULL) { | |
1160 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1161 | goto err; | |
1162 | } | |
1163 | } | |
1164 | ||
1165 | if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) { | |
1166 | priv_key->publicKey = M_ASN1_BIT_STRING_new(); | |
1167 | if (priv_key->publicKey == NULL) { | |
1168 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1169 | goto err; | |
1170 | } | |
1171 | ||
1172 | tmp_len = EC_POINT_point2oct(a->group, a->pub_key, | |
1173 | a->conv_form, NULL, 0, NULL); | |
1174 | ||
1175 | if (tmp_len > buf_len) { | |
1176 | unsigned char *tmp_buffer = OPENSSL_realloc(buffer, tmp_len); | |
1177 | if (!tmp_buffer) { | |
1178 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1179 | goto err; | |
1180 | } | |
1181 | buffer = tmp_buffer; | |
1182 | buf_len = tmp_len; | |
1183 | } | |
1184 | ||
1185 | if (!EC_POINT_point2oct(a->group, a->pub_key, | |
1186 | a->conv_form, buffer, buf_len, NULL)) { | |
1187 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1188 | goto err; | |
1189 | } | |
1190 | ||
1191 | priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
1192 | priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
1193 | if (!M_ASN1_BIT_STRING_set(priv_key->publicKey, buffer, buf_len)) { | |
1194 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB); | |
1195 | goto err; | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) { | |
1200 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1201 | goto err; | |
1202 | } | |
1203 | ok = 1; | |
1204 | err: | |
1205 | if (buffer) | |
1206 | OPENSSL_free(buffer); | |
1207 | if (priv_key) | |
1208 | EC_PRIVATEKEY_free(priv_key); | |
1209 | return (ok ? ret : 0); | |
1210 | } | |
14a7cfb3 BM |
1211 | |
1212 | int i2d_ECParameters(EC_KEY *a, unsigned char **out) | |
0f113f3e MC |
1213 | { |
1214 | if (a == NULL) { | |
1215 | ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
1216 | return 0; | |
1217 | } | |
1218 | return i2d_ECPKParameters(a->group, out); | |
1219 | } | |
14a7cfb3 BM |
1220 | |
1221 | EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len) | |
0f113f3e MC |
1222 | { |
1223 | EC_KEY *ret; | |
1224 | ||
1225 | if (in == NULL || *in == NULL) { | |
1226 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
1227 | return NULL; | |
1228 | } | |
1229 | ||
1230 | if (a == NULL || *a == NULL) { | |
1231 | if ((ret = EC_KEY_new()) == NULL) { | |
1232 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE); | |
1233 | return NULL; | |
1234 | } | |
1235 | if (a) | |
1236 | *a = ret; | |
1237 | } else | |
1238 | ret = *a; | |
1239 | ||
1240 | if (!d2i_ECPKParameters(&ret->group, in, len)) { | |
1241 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB); | |
1242 | return NULL; | |
1243 | } | |
1244 | ||
1245 | return ret; | |
1246 | } | |
14a7cfb3 | 1247 | |
62e3163b | 1248 | EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len) |
0f113f3e MC |
1249 | { |
1250 | EC_KEY *ret = NULL; | |
1251 | ||
1252 | if (a == NULL || (*a) == NULL || (*a)->group == NULL) { | |
1253 | /* | |
1254 | * sorry, but a EC_GROUP-structur is necessary to set the public key | |
1255 | */ | |
1256 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1257 | return 0; | |
1258 | } | |
1259 | ret = *a; | |
1260 | if (ret->pub_key == NULL && | |
1261 | (ret->pub_key = EC_POINT_new(ret->group)) == NULL) { | |
1262 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); | |
1263 | return 0; | |
1264 | } | |
1265 | if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL)) { | |
1266 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB); | |
1267 | return 0; | |
1268 | } | |
1269 | /* save the point conversion form */ | |
1270 | ret->conv_form = (point_conversion_form_t) (*in[0] & ~0x01); | |
1271 | *in += len; | |
1272 | return ret; | |
1273 | } | |
14a7cfb3 | 1274 | |
62e3163b | 1275 | int i2o_ECPublicKey(EC_KEY *a, unsigned char **out) |
0f113f3e MC |
1276 | { |
1277 | size_t buf_len = 0; | |
1278 | int new_buffer = 0; | |
1279 | ||
1280 | if (a == NULL) { | |
1281 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | buf_len = EC_POINT_point2oct(a->group, a->pub_key, | |
1286 | a->conv_form, NULL, 0, NULL); | |
1287 | ||
1288 | if (out == NULL || buf_len == 0) | |
1289 | /* out == NULL => just return the length of the octet string */ | |
1290 | return buf_len; | |
1291 | ||
1292 | if (*out == NULL) { | |
1293 | if ((*out = OPENSSL_malloc(buf_len)) == NULL) { | |
1294 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); | |
1295 | return 0; | |
1296 | } | |
1297 | new_buffer = 1; | |
1298 | } | |
1299 | if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form, | |
1300 | *out, buf_len, NULL)) { | |
1301 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB); | |
1302 | if (new_buffer) { | |
1303 | OPENSSL_free(*out); | |
1304 | *out = NULL; | |
1305 | } | |
1306 | return 0; | |
1307 | } | |
1308 | if (!new_buffer) | |
1309 | *out += buf_len; | |
1310 | return buf_len; | |
1311 | } |