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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) | |
df2ee0e2 | 207 | } static_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) | |
df2ee0e2 | 224 | } static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO) |
012c86ab | 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) | |
df2ee0e2 | 239 | } static_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) | |
df2ee0e2 | 245 | } static_ASN1_SEQUENCE_END(X9_62_CURVE) |
012c86ab | 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) | |
df2ee0e2 | 254 | } static_ASN1_SEQUENCE_END(ECPARAMETERS) |
012c86ab | 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) | |
df2ee0e2 | 263 | } static_ASN1_CHOICE_END(ECPKPARAMETERS) |
012c86ab BM |
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) | |
df2ee0e2 | 274 | } static_ASN1_SEQUENCE_END(EC_PRIVATEKEY) |
0bee0e62 | 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) */ | |
0dfb9398 | 320 | ASN1_OBJECT_free(field->fieldType); |
2ace7450 | 321 | ASN1_TYPE_free(field->p.other); |
0f113f3e MC |
322 | |
323 | nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group)); | |
324 | /* set OID for the field */ | |
325 | if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) { | |
326 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
327 | goto err; | |
328 | } | |
329 | ||
330 | if (nid == NID_X9_62_prime_field) { | |
331 | if ((tmp = BN_new()) == NULL) { | |
332 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
333 | goto err; | |
334 | } | |
335 | /* the parameters are specified by the prime number p */ | |
336 | if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL)) { | |
337 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); | |
338 | goto err; | |
339 | } | |
340 | /* set the prime number */ | |
341 | field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL); | |
342 | if (field->p.prime == NULL) { | |
343 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB); | |
344 | goto err; | |
345 | } | |
346 | } else /* nid == NID_X9_62_characteristic_two_field */ | |
b3310161 | 347 | #ifdef OPENSSL_NO_EC2M |
0f113f3e MC |
348 | { |
349 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED); | |
350 | goto err; | |
351 | } | |
b3310161 | 352 | #else |
0f113f3e MC |
353 | { |
354 | int field_type; | |
355 | X9_62_CHARACTERISTIC_TWO *char_two; | |
356 | ||
357 | field->p.char_two = X9_62_CHARACTERISTIC_TWO_new(); | |
358 | char_two = field->p.char_two; | |
359 | ||
360 | if (char_two == NULL) { | |
361 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
362 | goto err; | |
363 | } | |
364 | ||
365 | char_two->m = (long)EC_GROUP_get_degree(group); | |
366 | ||
367 | field_type = EC_GROUP_get_basis_type(group); | |
368 | ||
369 | if (field_type == 0) { | |
370 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); | |
371 | goto err; | |
372 | } | |
373 | /* set base type OID */ | |
374 | if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) { | |
375 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
376 | goto err; | |
377 | } | |
378 | ||
379 | if (field_type == NID_X9_62_tpBasis) { | |
380 | unsigned int k; | |
381 | ||
382 | if (!EC_GROUP_get_trinomial_basis(group, &k)) | |
383 | goto err; | |
384 | ||
385 | char_two->p.tpBasis = ASN1_INTEGER_new(); | |
90945fa3 | 386 | if (char_two->p.tpBasis == NULL) { |
0f113f3e MC |
387 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); |
388 | goto err; | |
389 | } | |
390 | if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) { | |
391 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB); | |
392 | goto err; | |
393 | } | |
394 | } else if (field_type == NID_X9_62_ppBasis) { | |
395 | unsigned int k1, k2, k3; | |
396 | ||
397 | if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3)) | |
398 | goto err; | |
399 | ||
400 | char_two->p.ppBasis = X9_62_PENTANOMIAL_new(); | |
90945fa3 | 401 | if (char_two->p.ppBasis == NULL) { |
0f113f3e MC |
402 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); |
403 | goto err; | |
404 | } | |
405 | ||
406 | /* set k? values */ | |
407 | char_two->p.ppBasis->k1 = (long)k1; | |
408 | char_two->p.ppBasis->k2 = (long)k2; | |
409 | char_two->p.ppBasis->k3 = (long)k3; | |
410 | } else { /* field_type == NID_X9_62_onBasis */ | |
411 | ||
412 | /* for ONB the parameters are (asn1) NULL */ | |
413 | char_two->p.onBasis = ASN1_NULL_new(); | |
90945fa3 | 414 | if (char_two->p.onBasis == NULL) { |
0f113f3e MC |
415 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); |
416 | goto err; | |
417 | } | |
418 | } | |
419 | } | |
b3310161 | 420 | #endif |
012c86ab | 421 | |
0f113f3e | 422 | ok = 1; |
012c86ab | 423 | |
23a1d5e9 RS |
424 | err: |
425 | BN_free(tmp); | |
0f113f3e | 426 | return (ok); |
012c86ab BM |
427 | } |
428 | ||
37af03d3 | 429 | static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve) |
0f113f3e MC |
430 | { |
431 | int ok = 0, nid; | |
432 | BIGNUM *tmp_1 = NULL, *tmp_2 = NULL; | |
433 | unsigned char *buffer_1 = NULL, *buffer_2 = NULL, | |
434 | *a_buf = NULL, *b_buf = NULL; | |
435 | size_t len_1, len_2; | |
436 | unsigned char char_zero = 0; | |
437 | ||
438 | if (!group || !curve || !curve->a || !curve->b) | |
439 | return 0; | |
440 | ||
441 | if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) { | |
442 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
443 | goto err; | |
444 | } | |
445 | ||
446 | nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group)); | |
447 | ||
448 | /* get a and b */ | |
449 | if (nid == NID_X9_62_prime_field) { | |
450 | if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL)) { | |
451 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB); | |
452 | goto err; | |
453 | } | |
454 | } | |
b3310161 | 455 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
456 | else { /* nid == NID_X9_62_characteristic_two_field */ |
457 | ||
458 | if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL)) { | |
459 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB); | |
460 | goto err; | |
461 | } | |
462 | } | |
b3310161 | 463 | #endif |
0f113f3e MC |
464 | len_1 = (size_t)BN_num_bytes(tmp_1); |
465 | len_2 = (size_t)BN_num_bytes(tmp_2); | |
466 | ||
467 | if (len_1 == 0) { | |
468 | /* len_1 == 0 => a == 0 */ | |
469 | a_buf = &char_zero; | |
470 | len_1 = 1; | |
471 | } else { | |
472 | if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL) { | |
473 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
474 | goto err; | |
475 | } | |
476 | if ((len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0) { | |
477 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB); | |
478 | goto err; | |
479 | } | |
480 | a_buf = buffer_1; | |
481 | } | |
482 | ||
483 | if (len_2 == 0) { | |
484 | /* len_2 == 0 => b == 0 */ | |
485 | b_buf = &char_zero; | |
486 | len_2 = 1; | |
487 | } else { | |
488 | if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL) { | |
489 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
490 | goto err; | |
491 | } | |
492 | if ((len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0) { | |
493 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB); | |
494 | goto err; | |
495 | } | |
496 | b_buf = buffer_2; | |
497 | } | |
498 | ||
499 | /* set a and b */ | |
f422a514 DSH |
500 | if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) || |
501 | !ASN1_OCTET_STRING_set(curve->b, b_buf, len_2)) { | |
0f113f3e MC |
502 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); |
503 | goto err; | |
504 | } | |
505 | ||
506 | /* set the seed (optional) */ | |
507 | if (group->seed) { | |
508 | if (!curve->seed) | |
509 | if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) { | |
510 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
511 | goto err; | |
512 | } | |
513 | curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
514 | curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
515 | if (!ASN1_BIT_STRING_set(curve->seed, group->seed, | |
516 | (int)group->seed_len)) { | |
517 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); | |
518 | goto err; | |
519 | } | |
520 | } else { | |
2ace7450 RS |
521 | ASN1_BIT_STRING_free(curve->seed); |
522 | curve->seed = NULL; | |
0f113f3e MC |
523 | } |
524 | ||
525 | ok = 1; | |
526 | ||
23a1d5e9 | 527 | err: |
b548a1f1 RS |
528 | OPENSSL_free(buffer_1); |
529 | OPENSSL_free(buffer_2); | |
23a1d5e9 RS |
530 | BN_free(tmp_1); |
531 | BN_free(tmp_2); | |
0f113f3e MC |
532 | return (ok); |
533 | } | |
012c86ab BM |
534 | |
535 | static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group, | |
536 | ECPARAMETERS *param) | |
0f113f3e | 537 | { |
0f113f3e MC |
538 | size_t len = 0; |
539 | ECPARAMETERS *ret = NULL; | |
540 | BIGNUM *tmp = NULL; | |
541 | unsigned char *buffer = NULL; | |
542 | const EC_POINT *point = NULL; | |
543 | point_conversion_form_t form; | |
544 | ||
545 | if ((tmp = BN_new()) == NULL) { | |
546 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
547 | goto err; | |
548 | } | |
549 | ||
550 | if (param == NULL) { | |
551 | if ((ret = ECPARAMETERS_new()) == NULL) { | |
552 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
553 | goto err; | |
554 | } | |
555 | } else | |
556 | ret = param; | |
557 | ||
558 | /* set the version (always one) */ | |
559 | ret->version = (long)0x1; | |
560 | ||
561 | /* set the fieldID */ | |
562 | if (!ec_asn1_group2fieldid(group, ret->fieldID)) { | |
563 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
564 | goto err; | |
565 | } | |
566 | ||
567 | /* set the curve */ | |
568 | if (!ec_asn1_group2curve(group, ret->curve)) { | |
569 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
570 | goto err; | |
571 | } | |
572 | ||
573 | /* set the base point */ | |
574 | if ((point = EC_GROUP_get0_generator(group)) == NULL) { | |
575 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, EC_R_UNDEFINED_GENERATOR); | |
576 | goto err; | |
577 | } | |
578 | ||
579 | form = EC_GROUP_get_point_conversion_form(group); | |
580 | ||
581 | len = EC_POINT_point2oct(group, point, form, NULL, len, NULL); | |
582 | if (len == 0) { | |
583 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
584 | goto err; | |
585 | } | |
586 | if ((buffer = OPENSSL_malloc(len)) == NULL) { | |
587 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
588 | goto err; | |
589 | } | |
590 | if (!EC_POINT_point2oct(group, point, form, buffer, len, NULL)) { | |
591 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
592 | goto err; | |
593 | } | |
594 | if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) { | |
595 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
596 | goto err; | |
597 | } | |
598 | if (!ASN1_OCTET_STRING_set(ret->base, buffer, len)) { | |
599 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
600 | goto err; | |
601 | } | |
602 | ||
603 | /* set the order */ | |
604 | if (!EC_GROUP_get_order(group, tmp, NULL)) { | |
605 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
606 | goto err; | |
607 | } | |
608 | ret->order = BN_to_ASN1_INTEGER(tmp, ret->order); | |
609 | if (ret->order == NULL) { | |
610 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
611 | goto err; | |
612 | } | |
613 | ||
614 | /* set the cofactor (optional) */ | |
615 | if (EC_GROUP_get_cofactor(group, tmp, NULL)) { | |
616 | ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor); | |
617 | if (ret->cofactor == NULL) { | |
618 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
619 | goto err; | |
620 | } | |
621 | } | |
622 | ||
23a1d5e9 | 623 | return ret; |
0f113f3e | 624 | |
23a1d5e9 RS |
625 | err: |
626 | if (!param) | |
627 | ECPARAMETERS_free(ret); | |
628 | BN_free(tmp); | |
b548a1f1 | 629 | OPENSSL_free(buffer); |
23a1d5e9 | 630 | return NULL; |
0f113f3e MC |
631 | } |
632 | ||
633 | ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *group, | |
012c86ab | 634 | ECPKPARAMETERS *params) |
0f113f3e MC |
635 | { |
636 | int ok = 1, tmp; | |
637 | ECPKPARAMETERS *ret = params; | |
638 | ||
639 | if (ret == NULL) { | |
640 | if ((ret = ECPKPARAMETERS_new()) == NULL) { | |
641 | ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS, ERR_R_MALLOC_FAILURE); | |
642 | return NULL; | |
643 | } | |
644 | } else { | |
0dfb9398 | 645 | if (ret->type == 0) |
0f113f3e MC |
646 | ASN1_OBJECT_free(ret->value.named_curve); |
647 | else if (ret->type == 1 && ret->value.parameters) | |
648 | ECPARAMETERS_free(ret->value.parameters); | |
649 | } | |
650 | ||
651 | if (EC_GROUP_get_asn1_flag(group)) { | |
652 | /* | |
653 | * use the asn1 OID to describe the the elliptic curve parameters | |
654 | */ | |
655 | tmp = EC_GROUP_get_curve_name(group); | |
656 | if (tmp) { | |
657 | ret->type = 0; | |
658 | if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL) | |
659 | ok = 0; | |
660 | } else | |
661 | /* we don't kmow the nid => ERROR */ | |
662 | ok = 0; | |
663 | } else { | |
664 | /* use the ECPARAMETERS structure */ | |
665 | ret->type = 1; | |
666 | if ((ret->value.parameters = | |
667 | ec_asn1_group2parameters(group, NULL)) == NULL) | |
668 | ok = 0; | |
669 | } | |
670 | ||
671 | if (!ok) { | |
672 | ECPKPARAMETERS_free(ret); | |
673 | return NULL; | |
674 | } | |
675 | return ret; | |
676 | } | |
012c86ab BM |
677 | |
678 | static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *params) | |
0f113f3e MC |
679 | { |
680 | int ok = 0, tmp; | |
681 | EC_GROUP *ret = NULL; | |
682 | BIGNUM *p = NULL, *a = NULL, *b = NULL; | |
683 | EC_POINT *point = NULL; | |
684 | long field_bits; | |
685 | ||
686 | if (!params->fieldID || !params->fieldID->fieldType || | |
687 | !params->fieldID->p.ptr) { | |
688 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
689 | goto err; | |
690 | } | |
691 | ||
692 | /* now extract the curve parameters a and b */ | |
693 | if (!params->curve || !params->curve->a || | |
694 | !params->curve->a->data || !params->curve->b || | |
695 | !params->curve->b->data) { | |
696 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
697 | goto err; | |
698 | } | |
699 | a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL); | |
700 | if (a == NULL) { | |
701 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB); | |
702 | goto err; | |
703 | } | |
704 | b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL); | |
705 | if (b == NULL) { | |
706 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB); | |
707 | goto err; | |
708 | } | |
709 | ||
710 | /* get the field parameters */ | |
711 | tmp = OBJ_obj2nid(params->fieldID->fieldType); | |
712 | if (tmp == NID_X9_62_characteristic_two_field) | |
b3310161 | 713 | #ifdef OPENSSL_NO_EC2M |
0f113f3e MC |
714 | { |
715 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_GF2M_NOT_SUPPORTED); | |
716 | goto err; | |
717 | } | |
b3310161 | 718 | #else |
0f113f3e MC |
719 | { |
720 | X9_62_CHARACTERISTIC_TWO *char_two; | |
721 | ||
722 | char_two = params->fieldID->p.char_two; | |
723 | ||
724 | field_bits = char_two->m; | |
725 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
726 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE); | |
727 | goto err; | |
728 | } | |
729 | ||
730 | if ((p = BN_new()) == NULL) { | |
731 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE); | |
732 | goto err; | |
733 | } | |
734 | ||
735 | /* get the base type */ | |
736 | tmp = OBJ_obj2nid(char_two->type); | |
737 | ||
738 | if (tmp == NID_X9_62_tpBasis) { | |
739 | long tmp_long; | |
740 | ||
741 | if (!char_two->p.tpBasis) { | |
742 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
743 | goto err; | |
744 | } | |
745 | ||
746 | tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis); | |
747 | ||
748 | if (!(char_two->m > tmp_long && tmp_long > 0)) { | |
749 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, | |
750 | EC_R_INVALID_TRINOMIAL_BASIS); | |
751 | goto err; | |
752 | } | |
753 | ||
754 | /* create the polynomial */ | |
755 | if (!BN_set_bit(p, (int)char_two->m)) | |
756 | goto err; | |
757 | if (!BN_set_bit(p, (int)tmp_long)) | |
758 | goto err; | |
759 | if (!BN_set_bit(p, 0)) | |
760 | goto err; | |
761 | } else if (tmp == NID_X9_62_ppBasis) { | |
762 | X9_62_PENTANOMIAL *penta; | |
763 | ||
764 | penta = char_two->p.ppBasis; | |
765 | if (!penta) { | |
766 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
767 | goto err; | |
768 | } | |
769 | ||
770 | if (! | |
771 | (char_two->m > penta->k3 && penta->k3 > penta->k2 | |
772 | && penta->k2 > penta->k1 && penta->k1 > 0)) { | |
773 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, | |
774 | EC_R_INVALID_PENTANOMIAL_BASIS); | |
775 | goto err; | |
776 | } | |
777 | ||
778 | /* create the polynomial */ | |
779 | if (!BN_set_bit(p, (int)char_two->m)) | |
780 | goto err; | |
781 | if (!BN_set_bit(p, (int)penta->k1)) | |
782 | goto err; | |
783 | if (!BN_set_bit(p, (int)penta->k2)) | |
784 | goto err; | |
785 | if (!BN_set_bit(p, (int)penta->k3)) | |
786 | goto err; | |
787 | if (!BN_set_bit(p, 0)) | |
788 | goto err; | |
789 | } else if (tmp == NID_X9_62_onBasis) { | |
790 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_NOT_IMPLEMENTED); | |
791 | goto err; | |
792 | } else { /* error */ | |
793 | ||
794 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
795 | goto err; | |
796 | } | |
797 | ||
798 | /* create the EC_GROUP structure */ | |
799 | ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL); | |
800 | } | |
b3310161 | 801 | #endif |
0f113f3e MC |
802 | else if (tmp == NID_X9_62_prime_field) { |
803 | /* we have a curve over a prime field */ | |
804 | /* extract the prime number */ | |
805 | if (!params->fieldID->p.prime) { | |
806 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
807 | goto err; | |
808 | } | |
809 | p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL); | |
810 | if (p == NULL) { | |
811 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
812 | goto err; | |
813 | } | |
814 | ||
815 | if (BN_is_negative(p) || BN_is_zero(p)) { | |
816 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD); | |
817 | goto err; | |
818 | } | |
819 | ||
820 | field_bits = BN_num_bits(p); | |
821 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
822 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE); | |
823 | goto err; | |
824 | } | |
825 | ||
826 | /* create the EC_GROUP structure */ | |
827 | ret = EC_GROUP_new_curve_GFp(p, a, b, NULL); | |
828 | } else { | |
829 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD); | |
830 | goto err; | |
831 | } | |
832 | ||
833 | if (ret == NULL) { | |
834 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
835 | goto err; | |
836 | } | |
837 | ||
838 | /* extract seed (optional) */ | |
839 | if (params->curve->seed != NULL) { | |
b548a1f1 | 840 | OPENSSL_free(ret->seed); |
75ebbd9a | 841 | if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL) { |
0f113f3e MC |
842 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE); |
843 | goto err; | |
844 | } | |
845 | memcpy(ret->seed, params->curve->seed->data, | |
846 | params->curve->seed->length); | |
847 | ret->seed_len = params->curve->seed->length; | |
848 | } | |
849 | ||
850 | if (!params->order || !params->base || !params->base->data) { | |
851 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
852 | goto err; | |
853 | } | |
854 | ||
855 | if ((point = EC_POINT_new(ret)) == NULL) | |
856 | goto err; | |
857 | ||
858 | /* set the point conversion form */ | |
859 | EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t) | |
860 | (params->base->data[0] & ~0x01)); | |
861 | ||
862 | /* extract the ec point */ | |
863 | if (!EC_POINT_oct2point(ret, point, params->base->data, | |
864 | params->base->length, NULL)) { | |
865 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
866 | goto err; | |
867 | } | |
868 | ||
869 | /* extract the order */ | |
870 | if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) { | |
871 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
872 | goto err; | |
873 | } | |
874 | if (BN_is_negative(a) || BN_is_zero(a)) { | |
875 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER); | |
876 | goto err; | |
877 | } | |
878 | if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */ | |
879 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER); | |
880 | goto err; | |
881 | } | |
882 | ||
883 | /* extract the cofactor (optional) */ | |
884 | if (params->cofactor == NULL) { | |
23a1d5e9 RS |
885 | BN_free(b); |
886 | b = NULL; | |
0f113f3e MC |
887 | } else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) { |
888 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
889 | goto err; | |
890 | } | |
891 | /* set the generator, order and cofactor (if present) */ | |
892 | if (!EC_GROUP_set_generator(ret, point, a, b)) { | |
893 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
894 | goto err; | |
895 | } | |
896 | ||
897 | ok = 1; | |
898 | ||
8fdc3734 RS |
899 | err: |
900 | if (!ok) { | |
901 | EC_GROUP_clear_free(ret); | |
0f113f3e MC |
902 | ret = NULL; |
903 | } | |
904 | ||
23a1d5e9 RS |
905 | BN_free(p); |
906 | BN_free(a); | |
907 | BN_free(b); | |
8fdc3734 | 908 | EC_POINT_free(point); |
0f113f3e | 909 | return (ret); |
012c86ab BM |
910 | } |
911 | ||
7e31164a | 912 | EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *params) |
0f113f3e MC |
913 | { |
914 | EC_GROUP *ret = NULL; | |
915 | int tmp = 0; | |
916 | ||
917 | if (params == NULL) { | |
918 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_MISSING_PARAMETERS); | |
919 | return NULL; | |
920 | } | |
921 | ||
922 | if (params->type == 0) { /* the curve is given by an OID */ | |
923 | tmp = OBJ_obj2nid(params->value.named_curve); | |
924 | if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) { | |
925 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, | |
926 | EC_R_EC_GROUP_NEW_BY_NAME_FAILURE); | |
927 | return NULL; | |
928 | } | |
929 | EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE); | |
930 | } else if (params->type == 1) { /* the parameters are given by a | |
931 | * ECPARAMETERS structure */ | |
932 | ret = ec_asn1_parameters2group(params->value.parameters); | |
933 | if (!ret) { | |
934 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, ERR_R_EC_LIB); | |
935 | return NULL; | |
936 | } | |
937 | EC_GROUP_set_asn1_flag(ret, 0x0); | |
938 | } else if (params->type == 2) { /* implicitlyCA */ | |
939 | return NULL; | |
940 | } else { | |
941 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
942 | return NULL; | |
943 | } | |
944 | ||
945 | return ret; | |
946 | } | |
012c86ab | 947 | |
14a7cfb3 | 948 | /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */ |
012c86ab | 949 | |
6343829a | 950 | EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len) |
0f113f3e MC |
951 | { |
952 | EC_GROUP *group = NULL; | |
953 | ECPKPARAMETERS *params = NULL; | |
a46c9789 | 954 | const unsigned char *p = *in; |
0f113f3e | 955 | |
a46c9789 | 956 | if ((params = d2i_ECPKPARAMETERS(NULL, &p, len)) == NULL) { |
0f113f3e MC |
957 | ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE); |
958 | ECPKPARAMETERS_free(params); | |
959 | return NULL; | |
960 | } | |
961 | ||
962 | if ((group = ec_asn1_pkparameters2group(params)) == NULL) { | |
963 | ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE); | |
964 | ECPKPARAMETERS_free(params); | |
965 | return NULL; | |
966 | } | |
967 | ||
8fdc3734 | 968 | if (a) { |
0f113f3e | 969 | EC_GROUP_clear_free(*a); |
0f113f3e | 970 | *a = group; |
8fdc3734 | 971 | } |
0f113f3e MC |
972 | |
973 | ECPKPARAMETERS_free(params); | |
a46c9789 | 974 | *in = p; |
0f113f3e MC |
975 | return (group); |
976 | } | |
012c86ab | 977 | |
14a7cfb3 | 978 | int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out) |
0f113f3e MC |
979 | { |
980 | int ret = 0; | |
981 | ECPKPARAMETERS *tmp = ec_asn1_group2pkparameters(a, NULL); | |
982 | if (tmp == NULL) { | |
983 | ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE); | |
984 | return 0; | |
985 | } | |
986 | if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) { | |
987 | ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE); | |
988 | ECPKPARAMETERS_free(tmp); | |
989 | return 0; | |
990 | } | |
991 | ECPKPARAMETERS_free(tmp); | |
992 | return (ret); | |
993 | } | |
012c86ab | 994 | |
14a7cfb3 BM |
995 | /* some EC_KEY functions */ |
996 | ||
6343829a | 997 | EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len) |
0f113f3e | 998 | { |
0f113f3e MC |
999 | EC_KEY *ret = NULL; |
1000 | EC_PRIVATEKEY *priv_key = NULL; | |
a46c9789 | 1001 | const unsigned char *p = *in; |
0f113f3e | 1002 | |
a46c9789 | 1003 | if ((priv_key = d2i_EC_PRIVATEKEY(NULL, &p, len)) == NULL) { |
0f113f3e | 1004 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); |
0f113f3e MC |
1005 | return NULL; |
1006 | } | |
1007 | ||
1008 | if (a == NULL || *a == NULL) { | |
1009 | if ((ret = EC_KEY_new()) == NULL) { | |
1010 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1011 | goto err; | |
1012 | } | |
0f113f3e MC |
1013 | } else |
1014 | ret = *a; | |
1015 | ||
1016 | if (priv_key->parameters) { | |
8fdc3734 | 1017 | EC_GROUP_clear_free(ret->group); |
0f113f3e MC |
1018 | ret->group = ec_asn1_pkparameters2group(priv_key->parameters); |
1019 | } | |
1020 | ||
1021 | if (ret->group == NULL) { | |
1022 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1023 | goto err; | |
1024 | } | |
1025 | ||
1026 | ret->version = priv_key->version; | |
1027 | ||
1028 | if (priv_key->privateKey) { | |
74924dcb RS |
1029 | if (ret->priv_key == NULL) |
1030 | ret->priv_key = BN_secure_new(); | |
90945fa3 MC |
1031 | if (ret->priv_key == NULL) { |
1032 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1033 | goto err; | |
1034 | } | |
f422a514 DSH |
1035 | ret->priv_key = BN_bin2bn(ASN1_STRING_data(priv_key->privateKey), |
1036 | ASN1_STRING_length(priv_key->privateKey), | |
0f113f3e MC |
1037 | ret->priv_key); |
1038 | if (ret->priv_key == NULL) { | |
1039 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_BN_LIB); | |
1040 | goto err; | |
1041 | } | |
1042 | } else { | |
1043 | ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY); | |
1044 | goto err; | |
1045 | } | |
1046 | ||
8fdc3734 | 1047 | EC_POINT_clear_free(ret->pub_key); |
0f113f3e MC |
1048 | ret->pub_key = EC_POINT_new(ret->group); |
1049 | if (ret->pub_key == NULL) { | |
1050 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1051 | goto err; | |
1052 | } | |
1053 | ||
1054 | if (priv_key->publicKey) { | |
1055 | const unsigned char *pub_oct; | |
1056 | int pub_oct_len; | |
1057 | ||
f422a514 DSH |
1058 | pub_oct = ASN1_STRING_data(priv_key->publicKey); |
1059 | pub_oct_len = ASN1_STRING_length(priv_key->publicKey); | |
0f113f3e MC |
1060 | /* |
1061 | * The first byte - point conversion form - must be present. | |
1062 | */ | |
1063 | if (pub_oct_len <= 0) { | |
1064 | ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_BUFFER_TOO_SMALL); | |
1065 | goto err; | |
1066 | } | |
1067 | /* Save the point conversion form. */ | |
1068 | ret->conv_form = (point_conversion_form_t) (pub_oct[0] & ~0x01); | |
1069 | if (!EC_POINT_oct2point(ret->group, ret->pub_key, | |
1070 | pub_oct, (size_t)(pub_oct_len), NULL)) { | |
1071 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1072 | goto err; | |
1073 | } | |
1074 | } else { | |
1075 | if (!EC_POINT_mul | |
1076 | (ret->group, ret->pub_key, ret->priv_key, NULL, NULL, NULL)) { | |
1077 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1078 | goto err; | |
1079 | } | |
1080 | /* Remember the original private-key-only encoding. */ | |
1081 | ret->enc_flag |= EC_PKEY_NO_PUBKEY; | |
1082 | } | |
1083 | ||
9e442d48 MC |
1084 | if (a) |
1085 | *a = ret; | |
25aaa98a | 1086 | EC_PRIVATEKEY_free(priv_key); |
a46c9789 | 1087 | *in = p; |
0f113f3e | 1088 | return (ret); |
25aaa98a RS |
1089 | |
1090 | err: | |
1091 | if (a == NULL || *a != ret) | |
1092 | EC_KEY_free(ret); | |
1093 | EC_PRIVATEKEY_free(priv_key); | |
1094 | return NULL; | |
0f113f3e MC |
1095 | } |
1096 | ||
1097 | int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out) | |
1098 | { | |
1099 | int ret = 0, ok = 0; | |
1100 | unsigned char *buffer = NULL; | |
30cd4ff2 | 1101 | size_t buf_len = 0, tmp_len, bn_len; |
0f113f3e MC |
1102 | EC_PRIVATEKEY *priv_key = NULL; |
1103 | ||
1104 | if (a == NULL || a->group == NULL || a->priv_key == NULL || | |
1105 | (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) { | |
1106 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1107 | goto err; | |
1108 | } | |
1109 | ||
1110 | if ((priv_key = EC_PRIVATEKEY_new()) == NULL) { | |
1111 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1112 | goto err; | |
1113 | } | |
1114 | ||
1115 | priv_key->version = a->version; | |
1116 | ||
30cd4ff2 DE |
1117 | bn_len = (size_t)BN_num_bytes(a->priv_key); |
1118 | ||
1119 | /* Octetstring may need leading zeros if BN is to short */ | |
1120 | ||
1121 | buf_len = (EC_GROUP_get_degree(a->group) + 7) / 8; | |
1122 | ||
1123 | if (bn_len > buf_len) { | |
1124 | ECerr(EC_F_I2D_ECPRIVATEKEY, EC_R_BUFFER_TOO_SMALL); | |
1125 | goto err; | |
1126 | } | |
1127 | ||
0f113f3e MC |
1128 | buffer = OPENSSL_malloc(buf_len); |
1129 | if (buffer == NULL) { | |
1130 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1131 | goto err; | |
1132 | } | |
1133 | ||
30cd4ff2 | 1134 | if (!BN_bn2bin(a->priv_key, buffer + buf_len - bn_len)) { |
0f113f3e MC |
1135 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_BN_LIB); |
1136 | goto err; | |
1137 | } | |
1138 | ||
30cd4ff2 DE |
1139 | if (buf_len - bn_len > 0) { |
1140 | memset(buffer, 0, buf_len - bn_len); | |
1141 | } | |
1142 | ||
f422a514 | 1143 | if (!ASN1_OCTET_STRING_set(priv_key->privateKey, buffer, buf_len)) { |
0f113f3e MC |
1144 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB); |
1145 | goto err; | |
1146 | } | |
1147 | ||
1148 | if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) { | |
1149 | if ((priv_key->parameters = | |
1150 | ec_asn1_group2pkparameters(a->group, | |
1151 | priv_key->parameters)) == NULL) { | |
1152 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1153 | goto err; | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) { | |
f422a514 | 1158 | priv_key->publicKey = ASN1_BIT_STRING_new(); |
0f113f3e MC |
1159 | if (priv_key->publicKey == NULL) { |
1160 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1161 | goto err; | |
1162 | } | |
1163 | ||
1164 | tmp_len = EC_POINT_point2oct(a->group, a->pub_key, | |
1165 | a->conv_form, NULL, 0, NULL); | |
1166 | ||
1167 | if (tmp_len > buf_len) { | |
1168 | unsigned char *tmp_buffer = OPENSSL_realloc(buffer, tmp_len); | |
1169 | if (!tmp_buffer) { | |
1170 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1171 | goto err; | |
1172 | } | |
1173 | buffer = tmp_buffer; | |
1174 | buf_len = tmp_len; | |
1175 | } | |
1176 | ||
1177 | if (!EC_POINT_point2oct(a->group, a->pub_key, | |
1178 | a->conv_form, buffer, buf_len, NULL)) { | |
1179 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1180 | goto err; | |
1181 | } | |
1182 | ||
1183 | priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
1184 | priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
f422a514 | 1185 | if (!ASN1_BIT_STRING_set(priv_key->publicKey, buffer, buf_len)) { |
0f113f3e MC |
1186 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB); |
1187 | goto err; | |
1188 | } | |
1189 | } | |
1190 | ||
1191 | if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) { | |
1192 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1193 | goto err; | |
1194 | } | |
1195 | ok = 1; | |
1196 | err: | |
b548a1f1 | 1197 | OPENSSL_free(buffer); |
25aaa98a | 1198 | EC_PRIVATEKEY_free(priv_key); |
0f113f3e MC |
1199 | return (ok ? ret : 0); |
1200 | } | |
14a7cfb3 BM |
1201 | |
1202 | int i2d_ECParameters(EC_KEY *a, unsigned char **out) | |
0f113f3e MC |
1203 | { |
1204 | if (a == NULL) { | |
1205 | ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
1206 | return 0; | |
1207 | } | |
1208 | return i2d_ECPKParameters(a->group, out); | |
1209 | } | |
14a7cfb3 BM |
1210 | |
1211 | EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len) | |
0f113f3e MC |
1212 | { |
1213 | EC_KEY *ret; | |
1214 | ||
1215 | if (in == NULL || *in == NULL) { | |
1216 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
1217 | return NULL; | |
1218 | } | |
1219 | ||
1220 | if (a == NULL || *a == NULL) { | |
1221 | if ((ret = EC_KEY_new()) == NULL) { | |
1222 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE); | |
1223 | return NULL; | |
1224 | } | |
0f113f3e MC |
1225 | } else |
1226 | ret = *a; | |
1227 | ||
1228 | if (!d2i_ECPKParameters(&ret->group, in, len)) { | |
1229 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB); | |
5e5d53d3 MC |
1230 | if (a == NULL || *a != ret) |
1231 | EC_KEY_free(ret); | |
0f113f3e MC |
1232 | return NULL; |
1233 | } | |
1234 | ||
5e5d53d3 MC |
1235 | if (a) |
1236 | *a = ret; | |
1237 | ||
0f113f3e MC |
1238 | return ret; |
1239 | } | |
14a7cfb3 | 1240 | |
62e3163b | 1241 | EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len) |
0f113f3e MC |
1242 | { |
1243 | EC_KEY *ret = NULL; | |
1244 | ||
1245 | if (a == NULL || (*a) == NULL || (*a)->group == NULL) { | |
1246 | /* | |
1247 | * sorry, but a EC_GROUP-structur is necessary to set the public key | |
1248 | */ | |
1249 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1250 | return 0; | |
1251 | } | |
1252 | ret = *a; | |
1253 | if (ret->pub_key == NULL && | |
1254 | (ret->pub_key = EC_POINT_new(ret->group)) == NULL) { | |
1255 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); | |
1256 | return 0; | |
1257 | } | |
1258 | if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL)) { | |
1259 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB); | |
1260 | return 0; | |
1261 | } | |
1262 | /* save the point conversion form */ | |
1263 | ret->conv_form = (point_conversion_form_t) (*in[0] & ~0x01); | |
1264 | *in += len; | |
1265 | return ret; | |
1266 | } | |
14a7cfb3 | 1267 | |
62e3163b | 1268 | int i2o_ECPublicKey(EC_KEY *a, unsigned char **out) |
0f113f3e MC |
1269 | { |
1270 | size_t buf_len = 0; | |
1271 | int new_buffer = 0; | |
1272 | ||
1273 | if (a == NULL) { | |
1274 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1275 | return 0; | |
1276 | } | |
1277 | ||
1278 | buf_len = EC_POINT_point2oct(a->group, a->pub_key, | |
1279 | a->conv_form, NULL, 0, NULL); | |
1280 | ||
1281 | if (out == NULL || buf_len == 0) | |
1282 | /* out == NULL => just return the length of the octet string */ | |
1283 | return buf_len; | |
1284 | ||
1285 | if (*out == NULL) { | |
1286 | if ((*out = OPENSSL_malloc(buf_len)) == NULL) { | |
1287 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); | |
1288 | return 0; | |
1289 | } | |
1290 | new_buffer = 1; | |
1291 | } | |
1292 | if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form, | |
1293 | *out, buf_len, NULL)) { | |
1294 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB); | |
1295 | if (new_buffer) { | |
1296 | OPENSSL_free(*out); | |
1297 | *out = NULL; | |
1298 | } | |
1299 | return 0; | |
1300 | } | |
1301 | if (!new_buffer) | |
1302 | *out += buf_len; | |
1303 | return buf_len; | |
1304 | } |