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Commit | Line | Data |
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7e31164a BM |
1 | /* |
2 | * Written by Nils Larsch for the OpenSSL project. | |
3 | */ | |
012c86ab | 4 | /* ==================================================================== |
82516e3b | 5 | * Copyright (c) 2000-2003 The OpenSSL Project. All rights reserved. |
012c86ab BM |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * | |
11 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 12 | * notice, this list of conditions and the following disclaimer. |
012c86ab BM |
13 | * |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in | |
16 | * the documentation and/or other materials provided with the | |
17 | * distribution. | |
18 | * | |
19 | * 3. All advertising materials mentioning features or use of this | |
20 | * software must display the following acknowledgment: | |
21 | * "This product includes software developed by the OpenSSL Project | |
22 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
23 | * | |
24 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
25 | * endorse or promote products derived from this software without | |
26 | * prior written permission. For written permission, please contact | |
27 | * licensing@OpenSSL.org. | |
28 | * | |
29 | * 5. Products derived from this software may not be called "OpenSSL" | |
30 | * nor may "OpenSSL" appear in their names without prior written | |
31 | * permission of the OpenSSL Project. | |
32 | * | |
33 | * 6. Redistributions of any form whatsoever must retain the following | |
34 | * acknowledgment: | |
35 | * "This product includes software developed by the OpenSSL Project | |
36 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
37 | * | |
38 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
39 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
40 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
41 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
42 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
43 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
44 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
45 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
46 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
47 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
48 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
49 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
50 | * ==================================================================== | |
51 | * | |
52 | * This product includes cryptographic software written by Eric Young | |
53 | * (eay@cryptsoft.com). This product includes software written by Tim | |
54 | * Hudson (tjh@cryptsoft.com). | |
55 | * | |
56 | */ | |
57 | ||
5454829a | 58 | #include <string.h> |
012c86ab | 59 | #include "ec_lcl.h" |
0bee0e62 | 60 | #include <openssl/err.h> |
012c86ab BM |
61 | #include <openssl/asn1t.h> |
62 | #include <openssl/objects.h> | |
63 | ||
34f1f2a8 | 64 | int EC_GROUP_get_basis_type(const EC_GROUP *group) |
0f113f3e MC |
65 | { |
66 | int i = 0; | |
67 | ||
68 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != | |
69 | NID_X9_62_characteristic_two_field) | |
70 | /* everything else is currently not supported */ | |
71 | return 0; | |
72 | ||
73 | while (group->poly[i] != 0) | |
74 | i++; | |
75 | ||
76 | if (i == 4) | |
77 | return NID_X9_62_ppBasis; | |
78 | else if (i == 2) | |
79 | return NID_X9_62_tpBasis; | |
80 | else | |
81 | /* everything else is currently not supported */ | |
82 | return 0; | |
83 | } | |
84 | ||
b3310161 | 85 | #ifndef OPENSSL_NO_EC2M |
34f1f2a8 | 86 | int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k) |
0f113f3e MC |
87 | { |
88 | if (group == NULL) | |
89 | return 0; | |
90 | ||
91 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != | |
92 | NID_X9_62_characteristic_two_field | |
93 | || !((group->poly[0] != 0) && (group->poly[1] != 0) | |
94 | && (group->poly[2] == 0))) { | |
95 | ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS, | |
96 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
97 | return 0; | |
98 | } | |
99 | ||
100 | if (k) | |
101 | *k = group->poly[1]; | |
102 | ||
103 | return 1; | |
104 | } | |
105 | ||
34f1f2a8 | 106 | int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1, |
0f113f3e MC |
107 | unsigned int *k2, unsigned int *k3) |
108 | { | |
109 | if (group == NULL) | |
110 | return 0; | |
111 | ||
112 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != | |
113 | NID_X9_62_characteristic_two_field | |
114 | || !((group->poly[0] != 0) && (group->poly[1] != 0) | |
115 | && (group->poly[2] != 0) && (group->poly[3] != 0) | |
116 | && (group->poly[4] == 0))) { | |
117 | ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS, | |
118 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
119 | return 0; | |
120 | } | |
121 | ||
122 | if (k1) | |
123 | *k1 = group->poly[3]; | |
124 | if (k2) | |
125 | *k2 = group->poly[2]; | |
126 | if (k3) | |
127 | *k3 = group->poly[1]; | |
128 | ||
129 | return 1; | |
130 | } | |
b3310161 | 131 | #endif |
8aefe253 | 132 | |
012c86ab | 133 | /* some structures needed for the asn1 encoding */ |
012c86ab | 134 | typedef struct x9_62_pentanomial_st { |
0f113f3e MC |
135 | long k1; |
136 | long k2; | |
137 | long k3; | |
138 | } X9_62_PENTANOMIAL; | |
012c86ab | 139 | |
37af03d3 | 140 | typedef struct x9_62_characteristic_two_st { |
0f113f3e MC |
141 | long m; |
142 | ASN1_OBJECT *type; | |
143 | union { | |
144 | char *ptr; | |
145 | /* NID_X9_62_onBasis */ | |
146 | ASN1_NULL *onBasis; | |
147 | /* NID_X9_62_tpBasis */ | |
148 | ASN1_INTEGER *tpBasis; | |
149 | /* NID_X9_62_ppBasis */ | |
150 | X9_62_PENTANOMIAL *ppBasis; | |
151 | /* anything else */ | |
152 | ASN1_TYPE *other; | |
153 | } p; | |
154 | } X9_62_CHARACTERISTIC_TWO; | |
37af03d3 GT |
155 | |
156 | typedef struct x9_62_fieldid_st { | |
0f113f3e MC |
157 | ASN1_OBJECT *fieldType; |
158 | union { | |
159 | char *ptr; | |
160 | /* NID_X9_62_prime_field */ | |
161 | ASN1_INTEGER *prime; | |
162 | /* NID_X9_62_characteristic_two_field */ | |
163 | X9_62_CHARACTERISTIC_TWO *char_two; | |
164 | /* anything else */ | |
165 | ASN1_TYPE *other; | |
166 | } p; | |
167 | } X9_62_FIELDID; | |
37af03d3 | 168 | |
012c86ab | 169 | typedef struct x9_62_curve_st { |
0f113f3e MC |
170 | ASN1_OCTET_STRING *a; |
171 | ASN1_OCTET_STRING *b; | |
172 | ASN1_BIT_STRING *seed; | |
173 | } X9_62_CURVE; | |
012c86ab | 174 | |
14a7cfb3 | 175 | typedef struct ec_parameters_st { |
0f113f3e MC |
176 | long version; |
177 | X9_62_FIELDID *fieldID; | |
178 | X9_62_CURVE *curve; | |
179 | ASN1_OCTET_STRING *base; | |
180 | ASN1_INTEGER *order; | |
181 | ASN1_INTEGER *cofactor; | |
182 | } ECPARAMETERS; | |
012c86ab BM |
183 | |
184 | struct ecpk_parameters_st { | |
0f113f3e MC |
185 | int type; |
186 | union { | |
187 | ASN1_OBJECT *named_curve; | |
188 | ECPARAMETERS *parameters; | |
189 | ASN1_NULL *implicitlyCA; | |
190 | } value; | |
191 | } /* ECPKPARAMETERS */ ; | |
012c86ab | 192 | |
14a7cfb3 BM |
193 | /* SEC1 ECPrivateKey */ |
194 | typedef struct ec_privatekey_st { | |
0f113f3e MC |
195 | long version; |
196 | ASN1_OCTET_STRING *privateKey; | |
197 | ECPKPARAMETERS *parameters; | |
198 | ASN1_BIT_STRING *publicKey; | |
199 | } EC_PRIVATEKEY; | |
14a7cfb3 | 200 | |
37af03d3 GT |
201 | /* the OpenSSL ASN.1 definitions */ |
202 | ASN1_SEQUENCE(X9_62_PENTANOMIAL) = { | |
0f113f3e MC |
203 | ASN1_SIMPLE(X9_62_PENTANOMIAL, k1, LONG), |
204 | ASN1_SIMPLE(X9_62_PENTANOMIAL, k2, LONG), | |
205 | ASN1_SIMPLE(X9_62_PENTANOMIAL, k3, LONG) | |
df2ee0e2 | 206 | } static_ASN1_SEQUENCE_END(X9_62_PENTANOMIAL) |
012c86ab | 207 | |
37af03d3 GT |
208 | DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL) |
209 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL) | |
210 | ||
211 | ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY); | |
012c86ab | 212 | |
37af03d3 | 213 | ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = { |
0f113f3e MC |
214 | ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)), |
215 | ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)), | |
216 | ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL)) | |
37af03d3 | 217 | } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL); |
012c86ab BM |
218 | |
219 | ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = { | |
0f113f3e MC |
220 | ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, LONG), |
221 | ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT), | |
222 | ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO) | |
df2ee0e2 | 223 | } static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO) |
012c86ab | 224 | |
37af03d3 GT |
225 | DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO) |
226 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO) | |
012c86ab | 227 | |
37af03d3 GT |
228 | ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY); |
229 | ||
230 | ASN1_ADB(X9_62_FIELDID) = { | |
0f113f3e MC |
231 | ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)), |
232 | ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO)) | |
37af03d3 | 233 | } ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL); |
012c86ab | 234 | |
37af03d3 | 235 | ASN1_SEQUENCE(X9_62_FIELDID) = { |
0f113f3e MC |
236 | ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT), |
237 | ASN1_ADB_OBJECT(X9_62_FIELDID) | |
df2ee0e2 | 238 | } static_ASN1_SEQUENCE_END(X9_62_FIELDID) |
012c86ab BM |
239 | |
240 | ASN1_SEQUENCE(X9_62_CURVE) = { | |
0f113f3e MC |
241 | ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING), |
242 | ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING), | |
243 | ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING) | |
df2ee0e2 | 244 | } static_ASN1_SEQUENCE_END(X9_62_CURVE) |
012c86ab | 245 | |
012c86ab | 246 | ASN1_SEQUENCE(ECPARAMETERS) = { |
0f113f3e MC |
247 | ASN1_SIMPLE(ECPARAMETERS, version, LONG), |
248 | ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID), | |
249 | ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE), | |
250 | ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING), | |
251 | ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER), | |
252 | ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER) | |
df2ee0e2 | 253 | } static_ASN1_SEQUENCE_END(ECPARAMETERS) |
012c86ab | 254 | |
37af03d3 GT |
255 | DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) |
256 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) | |
012c86ab BM |
257 | |
258 | ASN1_CHOICE(ECPKPARAMETERS) = { | |
0f113f3e MC |
259 | ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT), |
260 | ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS), | |
261 | ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL) | |
df2ee0e2 | 262 | } static_ASN1_CHOICE_END(ECPKPARAMETERS) |
012c86ab BM |
263 | |
264 | DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS) | |
14a7cfb3 | 265 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS) |
012c86ab BM |
266 | IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS) |
267 | ||
0bee0e62 | 268 | ASN1_SEQUENCE(EC_PRIVATEKEY) = { |
0f113f3e MC |
269 | ASN1_SIMPLE(EC_PRIVATEKEY, version, LONG), |
270 | ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING), | |
271 | ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0), | |
272 | ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1) | |
df2ee0e2 | 273 | } static_ASN1_SEQUENCE_END(EC_PRIVATEKEY) |
0bee0e62 | 274 | |
14a7cfb3 BM |
275 | DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY) |
276 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY) | |
0bee0e62 BM |
277 | IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY) |
278 | ||
7e31164a | 279 | /* some declarations of internal function */ |
012c86ab | 280 | |
0f113f3e | 281 | /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */ |
37af03d3 | 282 | static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *); |
0f113f3e | 283 | /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */ |
37af03d3 | 284 | static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *); |
0f113f3e MC |
285 | /* |
286 | * ec_asn1_parameters2group() creates a EC_GROUP object from a ECPARAMETERS | |
287 | * object | |
288 | */ | |
289 | static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *); | |
290 | /* | |
291 | * ec_asn1_group2parameters() creates a ECPARAMETERS object from a EC_GROUP | |
292 | * object | |
293 | */ | |
294 | static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *, | |
295 | ECPARAMETERS *); | |
296 | /* | |
297 | * ec_asn1_pkparameters2group() creates a EC_GROUP object from a | |
298 | * ECPKPARAMETERS object | |
299 | */ | |
300 | static EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *); | |
301 | /* | |
302 | * ec_asn1_group2pkparameters() creates a ECPKPARAMETERS object from a | |
303 | * EC_GROUP object | |
304 | */ | |
305 | static ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *, | |
306 | ECPKPARAMETERS *); | |
7e31164a BM |
307 | |
308 | /* the function definitions */ | |
012c86ab | 309 | |
37af03d3 | 310 | static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field) |
0f113f3e MC |
311 | { |
312 | int ok = 0, nid; | |
313 | BIGNUM *tmp = NULL; | |
314 | ||
315 | if (group == NULL || field == NULL) | |
316 | return 0; | |
317 | ||
318 | /* clear the old values (if necessary) */ | |
0dfb9398 | 319 | ASN1_OBJECT_free(field->fieldType); |
2ace7450 | 320 | ASN1_TYPE_free(field->p.other); |
0f113f3e MC |
321 | |
322 | nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group)); | |
323 | /* set OID for the field */ | |
324 | if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) { | |
325 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
326 | goto err; | |
327 | } | |
328 | ||
329 | if (nid == NID_X9_62_prime_field) { | |
330 | if ((tmp = BN_new()) == NULL) { | |
331 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
332 | goto err; | |
333 | } | |
334 | /* the parameters are specified by the prime number p */ | |
335 | if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL)) { | |
336 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); | |
337 | goto err; | |
338 | } | |
339 | /* set the prime number */ | |
340 | field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL); | |
341 | if (field->p.prime == NULL) { | |
342 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB); | |
343 | goto err; | |
344 | } | |
345 | } else /* nid == NID_X9_62_characteristic_two_field */ | |
b3310161 | 346 | #ifdef OPENSSL_NO_EC2M |
0f113f3e MC |
347 | { |
348 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED); | |
349 | goto err; | |
350 | } | |
b3310161 | 351 | #else |
0f113f3e MC |
352 | { |
353 | int field_type; | |
354 | X9_62_CHARACTERISTIC_TWO *char_two; | |
355 | ||
356 | field->p.char_two = X9_62_CHARACTERISTIC_TWO_new(); | |
357 | char_two = field->p.char_two; | |
358 | ||
359 | if (char_two == NULL) { | |
360 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
361 | goto err; | |
362 | } | |
363 | ||
364 | char_two->m = (long)EC_GROUP_get_degree(group); | |
365 | ||
366 | field_type = EC_GROUP_get_basis_type(group); | |
367 | ||
368 | if (field_type == 0) { | |
369 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); | |
370 | goto err; | |
371 | } | |
372 | /* set base type OID */ | |
373 | if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) { | |
374 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
375 | goto err; | |
376 | } | |
377 | ||
378 | if (field_type == NID_X9_62_tpBasis) { | |
379 | unsigned int k; | |
380 | ||
381 | if (!EC_GROUP_get_trinomial_basis(group, &k)) | |
382 | goto err; | |
383 | ||
384 | char_two->p.tpBasis = ASN1_INTEGER_new(); | |
90945fa3 | 385 | if (char_two->p.tpBasis == NULL) { |
0f113f3e MC |
386 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); |
387 | goto err; | |
388 | } | |
389 | if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) { | |
390 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB); | |
391 | goto err; | |
392 | } | |
393 | } else if (field_type == NID_X9_62_ppBasis) { | |
394 | unsigned int k1, k2, k3; | |
395 | ||
396 | if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3)) | |
397 | goto err; | |
398 | ||
399 | char_two->p.ppBasis = X9_62_PENTANOMIAL_new(); | |
90945fa3 | 400 | if (char_two->p.ppBasis == NULL) { |
0f113f3e MC |
401 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); |
402 | goto err; | |
403 | } | |
404 | ||
405 | /* set k? values */ | |
406 | char_two->p.ppBasis->k1 = (long)k1; | |
407 | char_two->p.ppBasis->k2 = (long)k2; | |
408 | char_two->p.ppBasis->k3 = (long)k3; | |
409 | } else { /* field_type == NID_X9_62_onBasis */ | |
410 | ||
411 | /* for ONB the parameters are (asn1) NULL */ | |
412 | char_two->p.onBasis = ASN1_NULL_new(); | |
90945fa3 | 413 | if (char_two->p.onBasis == NULL) { |
0f113f3e MC |
414 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); |
415 | goto err; | |
416 | } | |
417 | } | |
418 | } | |
b3310161 | 419 | #endif |
012c86ab | 420 | |
0f113f3e | 421 | ok = 1; |
012c86ab | 422 | |
23a1d5e9 RS |
423 | err: |
424 | BN_free(tmp); | |
0f113f3e | 425 | return (ok); |
012c86ab BM |
426 | } |
427 | ||
37af03d3 | 428 | static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve) |
0f113f3e MC |
429 | { |
430 | int ok = 0, nid; | |
431 | BIGNUM *tmp_1 = NULL, *tmp_2 = NULL; | |
432 | unsigned char *buffer_1 = NULL, *buffer_2 = NULL, | |
433 | *a_buf = NULL, *b_buf = NULL; | |
434 | size_t len_1, len_2; | |
435 | unsigned char char_zero = 0; | |
436 | ||
437 | if (!group || !curve || !curve->a || !curve->b) | |
438 | return 0; | |
439 | ||
440 | if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) { | |
441 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
442 | goto err; | |
443 | } | |
444 | ||
445 | nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group)); | |
446 | ||
447 | /* get a and b */ | |
448 | if (nid == NID_X9_62_prime_field) { | |
449 | if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL)) { | |
450 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB); | |
451 | goto err; | |
452 | } | |
453 | } | |
b3310161 | 454 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
455 | else { /* nid == NID_X9_62_characteristic_two_field */ |
456 | ||
457 | if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL)) { | |
458 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB); | |
459 | goto err; | |
460 | } | |
461 | } | |
b3310161 | 462 | #endif |
0f113f3e MC |
463 | len_1 = (size_t)BN_num_bytes(tmp_1); |
464 | len_2 = (size_t)BN_num_bytes(tmp_2); | |
465 | ||
466 | if (len_1 == 0) { | |
467 | /* len_1 == 0 => a == 0 */ | |
468 | a_buf = &char_zero; | |
469 | len_1 = 1; | |
470 | } else { | |
471 | if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL) { | |
472 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
473 | goto err; | |
474 | } | |
475 | if ((len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0) { | |
476 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB); | |
477 | goto err; | |
478 | } | |
479 | a_buf = buffer_1; | |
480 | } | |
481 | ||
482 | if (len_2 == 0) { | |
483 | /* len_2 == 0 => b == 0 */ | |
484 | b_buf = &char_zero; | |
485 | len_2 = 1; | |
486 | } else { | |
487 | if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL) { | |
488 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
489 | goto err; | |
490 | } | |
491 | if ((len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0) { | |
492 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB); | |
493 | goto err; | |
494 | } | |
495 | b_buf = buffer_2; | |
496 | } | |
497 | ||
498 | /* set a and b */ | |
f422a514 DSH |
499 | if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) || |
500 | !ASN1_OCTET_STRING_set(curve->b, b_buf, len_2)) { | |
0f113f3e MC |
501 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); |
502 | goto err; | |
503 | } | |
504 | ||
505 | /* set the seed (optional) */ | |
506 | if (group->seed) { | |
507 | if (!curve->seed) | |
508 | if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) { | |
509 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
510 | goto err; | |
511 | } | |
512 | curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
513 | curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
514 | if (!ASN1_BIT_STRING_set(curve->seed, group->seed, | |
515 | (int)group->seed_len)) { | |
516 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); | |
517 | goto err; | |
518 | } | |
519 | } else { | |
2ace7450 RS |
520 | ASN1_BIT_STRING_free(curve->seed); |
521 | curve->seed = NULL; | |
0f113f3e MC |
522 | } |
523 | ||
524 | ok = 1; | |
525 | ||
23a1d5e9 | 526 | err: |
b548a1f1 RS |
527 | OPENSSL_free(buffer_1); |
528 | OPENSSL_free(buffer_2); | |
23a1d5e9 RS |
529 | BN_free(tmp_1); |
530 | BN_free(tmp_2); | |
0f113f3e MC |
531 | return (ok); |
532 | } | |
012c86ab BM |
533 | |
534 | static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group, | |
535 | ECPARAMETERS *param) | |
0f113f3e | 536 | { |
0f113f3e MC |
537 | size_t len = 0; |
538 | ECPARAMETERS *ret = NULL; | |
be2e334f | 539 | const BIGNUM *tmp; |
0f113f3e MC |
540 | unsigned char *buffer = NULL; |
541 | const EC_POINT *point = NULL; | |
542 | point_conversion_form_t form; | |
543 | ||
0f113f3e MC |
544 | if (param == NULL) { |
545 | if ((ret = ECPARAMETERS_new()) == NULL) { | |
546 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
547 | goto err; | |
548 | } | |
549 | } else | |
550 | ret = param; | |
551 | ||
552 | /* set the version (always one) */ | |
553 | ret->version = (long)0x1; | |
554 | ||
555 | /* set the fieldID */ | |
556 | if (!ec_asn1_group2fieldid(group, ret->fieldID)) { | |
557 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
558 | goto err; | |
559 | } | |
560 | ||
561 | /* set the curve */ | |
562 | if (!ec_asn1_group2curve(group, ret->curve)) { | |
563 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
564 | goto err; | |
565 | } | |
566 | ||
567 | /* set the base point */ | |
568 | if ((point = EC_GROUP_get0_generator(group)) == NULL) { | |
569 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, EC_R_UNDEFINED_GENERATOR); | |
570 | goto err; | |
571 | } | |
572 | ||
573 | form = EC_GROUP_get_point_conversion_form(group); | |
574 | ||
981bd8a2 | 575 | len = EC_POINT_point2buf(group, point, form, &buffer, NULL); |
0f113f3e MC |
576 | if (len == 0) { |
577 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
578 | goto err; | |
579 | } | |
0f113f3e MC |
580 | if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) { |
581 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
582 | goto err; | |
583 | } | |
584 | if (!ASN1_OCTET_STRING_set(ret->base, buffer, len)) { | |
585 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
586 | goto err; | |
587 | } | |
588 | ||
589 | /* set the order */ | |
be2e334f DSH |
590 | tmp = EC_GROUP_get0_order(group); |
591 | if (tmp == NULL) { | |
0f113f3e MC |
592 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); |
593 | goto err; | |
594 | } | |
595 | ret->order = BN_to_ASN1_INTEGER(tmp, ret->order); | |
596 | if (ret->order == NULL) { | |
597 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
598 | goto err; | |
599 | } | |
600 | ||
601 | /* set the cofactor (optional) */ | |
be2e334f DSH |
602 | tmp = EC_GROUP_get0_cofactor(group); |
603 | if (tmp != NULL) { | |
0f113f3e MC |
604 | ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor); |
605 | if (ret->cofactor == NULL) { | |
606 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
607 | goto err; | |
608 | } | |
609 | } | |
610 | ||
23a1d5e9 | 611 | return ret; |
0f113f3e | 612 | |
23a1d5e9 RS |
613 | err: |
614 | if (!param) | |
615 | ECPARAMETERS_free(ret); | |
b548a1f1 | 616 | OPENSSL_free(buffer); |
23a1d5e9 | 617 | return NULL; |
0f113f3e MC |
618 | } |
619 | ||
620 | ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *group, | |
012c86ab | 621 | ECPKPARAMETERS *params) |
0f113f3e MC |
622 | { |
623 | int ok = 1, tmp; | |
624 | ECPKPARAMETERS *ret = params; | |
625 | ||
626 | if (ret == NULL) { | |
627 | if ((ret = ECPKPARAMETERS_new()) == NULL) { | |
628 | ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS, ERR_R_MALLOC_FAILURE); | |
629 | return NULL; | |
630 | } | |
631 | } else { | |
0dfb9398 | 632 | if (ret->type == 0) |
0f113f3e MC |
633 | ASN1_OBJECT_free(ret->value.named_curve); |
634 | else if (ret->type == 1 && ret->value.parameters) | |
635 | ECPARAMETERS_free(ret->value.parameters); | |
636 | } | |
637 | ||
638 | if (EC_GROUP_get_asn1_flag(group)) { | |
639 | /* | |
640 | * use the asn1 OID to describe the the elliptic curve parameters | |
641 | */ | |
642 | tmp = EC_GROUP_get_curve_name(group); | |
643 | if (tmp) { | |
644 | ret->type = 0; | |
645 | if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL) | |
646 | ok = 0; | |
647 | } else | |
648 | /* we don't kmow the nid => ERROR */ | |
649 | ok = 0; | |
650 | } else { | |
651 | /* use the ECPARAMETERS structure */ | |
652 | ret->type = 1; | |
653 | if ((ret->value.parameters = | |
654 | ec_asn1_group2parameters(group, NULL)) == NULL) | |
655 | ok = 0; | |
656 | } | |
657 | ||
658 | if (!ok) { | |
659 | ECPKPARAMETERS_free(ret); | |
660 | return NULL; | |
661 | } | |
662 | return ret; | |
663 | } | |
012c86ab BM |
664 | |
665 | static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *params) | |
0f113f3e MC |
666 | { |
667 | int ok = 0, tmp; | |
668 | EC_GROUP *ret = NULL; | |
669 | BIGNUM *p = NULL, *a = NULL, *b = NULL; | |
670 | EC_POINT *point = NULL; | |
671 | long field_bits; | |
672 | ||
673 | if (!params->fieldID || !params->fieldID->fieldType || | |
674 | !params->fieldID->p.ptr) { | |
675 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
676 | goto err; | |
677 | } | |
678 | ||
679 | /* now extract the curve parameters a and b */ | |
680 | if (!params->curve || !params->curve->a || | |
681 | !params->curve->a->data || !params->curve->b || | |
682 | !params->curve->b->data) { | |
683 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
684 | goto err; | |
685 | } | |
686 | a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL); | |
687 | if (a == NULL) { | |
688 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB); | |
689 | goto err; | |
690 | } | |
691 | b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL); | |
692 | if (b == NULL) { | |
693 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB); | |
694 | goto err; | |
695 | } | |
696 | ||
697 | /* get the field parameters */ | |
698 | tmp = OBJ_obj2nid(params->fieldID->fieldType); | |
699 | if (tmp == NID_X9_62_characteristic_two_field) | |
b3310161 | 700 | #ifdef OPENSSL_NO_EC2M |
0f113f3e MC |
701 | { |
702 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_GF2M_NOT_SUPPORTED); | |
703 | goto err; | |
704 | } | |
b3310161 | 705 | #else |
0f113f3e MC |
706 | { |
707 | X9_62_CHARACTERISTIC_TWO *char_two; | |
708 | ||
709 | char_two = params->fieldID->p.char_two; | |
710 | ||
711 | field_bits = char_two->m; | |
712 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
713 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE); | |
714 | goto err; | |
715 | } | |
716 | ||
717 | if ((p = BN_new()) == NULL) { | |
718 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE); | |
719 | goto err; | |
720 | } | |
721 | ||
722 | /* get the base type */ | |
723 | tmp = OBJ_obj2nid(char_two->type); | |
724 | ||
725 | if (tmp == NID_X9_62_tpBasis) { | |
726 | long tmp_long; | |
727 | ||
728 | if (!char_two->p.tpBasis) { | |
729 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
730 | goto err; | |
731 | } | |
732 | ||
733 | tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis); | |
734 | ||
735 | if (!(char_two->m > tmp_long && tmp_long > 0)) { | |
736 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, | |
737 | EC_R_INVALID_TRINOMIAL_BASIS); | |
738 | goto err; | |
739 | } | |
740 | ||
741 | /* create the polynomial */ | |
742 | if (!BN_set_bit(p, (int)char_two->m)) | |
743 | goto err; | |
744 | if (!BN_set_bit(p, (int)tmp_long)) | |
745 | goto err; | |
746 | if (!BN_set_bit(p, 0)) | |
747 | goto err; | |
748 | } else if (tmp == NID_X9_62_ppBasis) { | |
749 | X9_62_PENTANOMIAL *penta; | |
750 | ||
751 | penta = char_two->p.ppBasis; | |
752 | if (!penta) { | |
753 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
754 | goto err; | |
755 | } | |
756 | ||
757 | if (! | |
758 | (char_two->m > penta->k3 && penta->k3 > penta->k2 | |
759 | && penta->k2 > penta->k1 && penta->k1 > 0)) { | |
760 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, | |
761 | EC_R_INVALID_PENTANOMIAL_BASIS); | |
762 | goto err; | |
763 | } | |
764 | ||
765 | /* create the polynomial */ | |
766 | if (!BN_set_bit(p, (int)char_two->m)) | |
767 | goto err; | |
768 | if (!BN_set_bit(p, (int)penta->k1)) | |
769 | goto err; | |
770 | if (!BN_set_bit(p, (int)penta->k2)) | |
771 | goto err; | |
772 | if (!BN_set_bit(p, (int)penta->k3)) | |
773 | goto err; | |
774 | if (!BN_set_bit(p, 0)) | |
775 | goto err; | |
776 | } else if (tmp == NID_X9_62_onBasis) { | |
777 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_NOT_IMPLEMENTED); | |
778 | goto err; | |
779 | } else { /* error */ | |
780 | ||
781 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
782 | goto err; | |
783 | } | |
784 | ||
785 | /* create the EC_GROUP structure */ | |
786 | ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL); | |
787 | } | |
b3310161 | 788 | #endif |
0f113f3e MC |
789 | else if (tmp == NID_X9_62_prime_field) { |
790 | /* we have a curve over a prime field */ | |
791 | /* extract the prime number */ | |
792 | if (!params->fieldID->p.prime) { | |
793 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
794 | goto err; | |
795 | } | |
796 | p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL); | |
797 | if (p == NULL) { | |
798 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
799 | goto err; | |
800 | } | |
801 | ||
802 | if (BN_is_negative(p) || BN_is_zero(p)) { | |
803 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD); | |
804 | goto err; | |
805 | } | |
806 | ||
807 | field_bits = BN_num_bits(p); | |
808 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
809 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE); | |
810 | goto err; | |
811 | } | |
812 | ||
813 | /* create the EC_GROUP structure */ | |
814 | ret = EC_GROUP_new_curve_GFp(p, a, b, NULL); | |
815 | } else { | |
816 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD); | |
817 | goto err; | |
818 | } | |
819 | ||
820 | if (ret == NULL) { | |
821 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
822 | goto err; | |
823 | } | |
824 | ||
825 | /* extract seed (optional) */ | |
826 | if (params->curve->seed != NULL) { | |
b548a1f1 | 827 | OPENSSL_free(ret->seed); |
75ebbd9a | 828 | if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL) { |
0f113f3e MC |
829 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE); |
830 | goto err; | |
831 | } | |
832 | memcpy(ret->seed, params->curve->seed->data, | |
833 | params->curve->seed->length); | |
834 | ret->seed_len = params->curve->seed->length; | |
835 | } | |
836 | ||
837 | if (!params->order || !params->base || !params->base->data) { | |
838 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
839 | goto err; | |
840 | } | |
841 | ||
842 | if ((point = EC_POINT_new(ret)) == NULL) | |
843 | goto err; | |
844 | ||
845 | /* set the point conversion form */ | |
846 | EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t) | |
847 | (params->base->data[0] & ~0x01)); | |
848 | ||
849 | /* extract the ec point */ | |
850 | if (!EC_POINT_oct2point(ret, point, params->base->data, | |
851 | params->base->length, NULL)) { | |
852 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
853 | goto err; | |
854 | } | |
855 | ||
856 | /* extract the order */ | |
857 | if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) { | |
858 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
859 | goto err; | |
860 | } | |
861 | if (BN_is_negative(a) || BN_is_zero(a)) { | |
862 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER); | |
863 | goto err; | |
864 | } | |
865 | if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */ | |
866 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER); | |
867 | goto err; | |
868 | } | |
869 | ||
870 | /* extract the cofactor (optional) */ | |
871 | if (params->cofactor == NULL) { | |
23a1d5e9 RS |
872 | BN_free(b); |
873 | b = NULL; | |
0f113f3e MC |
874 | } else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) { |
875 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
876 | goto err; | |
877 | } | |
878 | /* set the generator, order and cofactor (if present) */ | |
879 | if (!EC_GROUP_set_generator(ret, point, a, b)) { | |
880 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
881 | goto err; | |
882 | } | |
883 | ||
884 | ok = 1; | |
885 | ||
8fdc3734 RS |
886 | err: |
887 | if (!ok) { | |
888 | EC_GROUP_clear_free(ret); | |
0f113f3e MC |
889 | ret = NULL; |
890 | } | |
891 | ||
23a1d5e9 RS |
892 | BN_free(p); |
893 | BN_free(a); | |
894 | BN_free(b); | |
8fdc3734 | 895 | EC_POINT_free(point); |
0f113f3e | 896 | return (ret); |
012c86ab BM |
897 | } |
898 | ||
7e31164a | 899 | EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *params) |
0f113f3e MC |
900 | { |
901 | EC_GROUP *ret = NULL; | |
902 | int tmp = 0; | |
903 | ||
904 | if (params == NULL) { | |
905 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_MISSING_PARAMETERS); | |
906 | return NULL; | |
907 | } | |
908 | ||
909 | if (params->type == 0) { /* the curve is given by an OID */ | |
910 | tmp = OBJ_obj2nid(params->value.named_curve); | |
911 | if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) { | |
912 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, | |
913 | EC_R_EC_GROUP_NEW_BY_NAME_FAILURE); | |
914 | return NULL; | |
915 | } | |
916 | EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE); | |
917 | } else if (params->type == 1) { /* the parameters are given by a | |
918 | * ECPARAMETERS structure */ | |
919 | ret = ec_asn1_parameters2group(params->value.parameters); | |
920 | if (!ret) { | |
921 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, ERR_R_EC_LIB); | |
922 | return NULL; | |
923 | } | |
924 | EC_GROUP_set_asn1_flag(ret, 0x0); | |
925 | } else if (params->type == 2) { /* implicitlyCA */ | |
926 | return NULL; | |
927 | } else { | |
928 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
929 | return NULL; | |
930 | } | |
931 | ||
932 | return ret; | |
933 | } | |
012c86ab | 934 | |
14a7cfb3 | 935 | /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */ |
012c86ab | 936 | |
6343829a | 937 | EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len) |
0f113f3e MC |
938 | { |
939 | EC_GROUP *group = NULL; | |
940 | ECPKPARAMETERS *params = NULL; | |
a46c9789 | 941 | const unsigned char *p = *in; |
0f113f3e | 942 | |
a46c9789 | 943 | if ((params = d2i_ECPKPARAMETERS(NULL, &p, len)) == NULL) { |
0f113f3e MC |
944 | ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE); |
945 | ECPKPARAMETERS_free(params); | |
946 | return NULL; | |
947 | } | |
948 | ||
949 | if ((group = ec_asn1_pkparameters2group(params)) == NULL) { | |
950 | ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE); | |
951 | ECPKPARAMETERS_free(params); | |
952 | return NULL; | |
953 | } | |
954 | ||
8fdc3734 | 955 | if (a) { |
0f113f3e | 956 | EC_GROUP_clear_free(*a); |
0f113f3e | 957 | *a = group; |
8fdc3734 | 958 | } |
0f113f3e MC |
959 | |
960 | ECPKPARAMETERS_free(params); | |
a46c9789 | 961 | *in = p; |
0f113f3e MC |
962 | return (group); |
963 | } | |
012c86ab | 964 | |
14a7cfb3 | 965 | int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out) |
0f113f3e MC |
966 | { |
967 | int ret = 0; | |
968 | ECPKPARAMETERS *tmp = ec_asn1_group2pkparameters(a, NULL); | |
969 | if (tmp == NULL) { | |
970 | ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE); | |
971 | return 0; | |
972 | } | |
973 | if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) { | |
974 | ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE); | |
975 | ECPKPARAMETERS_free(tmp); | |
976 | return 0; | |
977 | } | |
978 | ECPKPARAMETERS_free(tmp); | |
979 | return (ret); | |
980 | } | |
012c86ab | 981 | |
14a7cfb3 BM |
982 | /* some EC_KEY functions */ |
983 | ||
6343829a | 984 | EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len) |
0f113f3e | 985 | { |
0f113f3e MC |
986 | EC_KEY *ret = NULL; |
987 | EC_PRIVATEKEY *priv_key = NULL; | |
a46c9789 | 988 | const unsigned char *p = *in; |
0f113f3e | 989 | |
a46c9789 | 990 | if ((priv_key = d2i_EC_PRIVATEKEY(NULL, &p, len)) == NULL) { |
0f113f3e | 991 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); |
0f113f3e MC |
992 | return NULL; |
993 | } | |
994 | ||
995 | if (a == NULL || *a == NULL) { | |
996 | if ((ret = EC_KEY_new()) == NULL) { | |
997 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
998 | goto err; | |
999 | } | |
0f113f3e MC |
1000 | } else |
1001 | ret = *a; | |
1002 | ||
1003 | if (priv_key->parameters) { | |
8fdc3734 | 1004 | EC_GROUP_clear_free(ret->group); |
0f113f3e MC |
1005 | ret->group = ec_asn1_pkparameters2group(priv_key->parameters); |
1006 | } | |
1007 | ||
1008 | if (ret->group == NULL) { | |
1009 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1010 | goto err; | |
1011 | } | |
1012 | ||
1013 | ret->version = priv_key->version; | |
1014 | ||
1015 | if (priv_key->privateKey) { | |
74924dcb RS |
1016 | if (ret->priv_key == NULL) |
1017 | ret->priv_key = BN_secure_new(); | |
90945fa3 MC |
1018 | if (ret->priv_key == NULL) { |
1019 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1020 | goto err; | |
1021 | } | |
f422a514 DSH |
1022 | ret->priv_key = BN_bin2bn(ASN1_STRING_data(priv_key->privateKey), |
1023 | ASN1_STRING_length(priv_key->privateKey), | |
0f113f3e MC |
1024 | ret->priv_key); |
1025 | if (ret->priv_key == NULL) { | |
1026 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_BN_LIB); | |
1027 | goto err; | |
1028 | } | |
1029 | } else { | |
1030 | ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY); | |
1031 | goto err; | |
1032 | } | |
1033 | ||
8fdc3734 | 1034 | EC_POINT_clear_free(ret->pub_key); |
0f113f3e MC |
1035 | ret->pub_key = EC_POINT_new(ret->group); |
1036 | if (ret->pub_key == NULL) { | |
1037 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1038 | goto err; | |
1039 | } | |
1040 | ||
1041 | if (priv_key->publicKey) { | |
1042 | const unsigned char *pub_oct; | |
1043 | int pub_oct_len; | |
1044 | ||
f422a514 DSH |
1045 | pub_oct = ASN1_STRING_data(priv_key->publicKey); |
1046 | pub_oct_len = ASN1_STRING_length(priv_key->publicKey); | |
0f113f3e MC |
1047 | /* |
1048 | * The first byte - point conversion form - must be present. | |
1049 | */ | |
1050 | if (pub_oct_len <= 0) { | |
1051 | ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_BUFFER_TOO_SMALL); | |
1052 | goto err; | |
1053 | } | |
1054 | /* Save the point conversion form. */ | |
1055 | ret->conv_form = (point_conversion_form_t) (pub_oct[0] & ~0x01); | |
1056 | if (!EC_POINT_oct2point(ret->group, ret->pub_key, | |
1057 | pub_oct, (size_t)(pub_oct_len), NULL)) { | |
1058 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1059 | goto err; | |
1060 | } | |
1061 | } else { | |
1062 | if (!EC_POINT_mul | |
1063 | (ret->group, ret->pub_key, ret->priv_key, NULL, NULL, NULL)) { | |
1064 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1065 | goto err; | |
1066 | } | |
1067 | /* Remember the original private-key-only encoding. */ | |
1068 | ret->enc_flag |= EC_PKEY_NO_PUBKEY; | |
1069 | } | |
1070 | ||
9e442d48 MC |
1071 | if (a) |
1072 | *a = ret; | |
25aaa98a | 1073 | EC_PRIVATEKEY_free(priv_key); |
a46c9789 | 1074 | *in = p; |
0f113f3e | 1075 | return (ret); |
25aaa98a RS |
1076 | |
1077 | err: | |
1078 | if (a == NULL || *a != ret) | |
1079 | EC_KEY_free(ret); | |
1080 | EC_PRIVATEKEY_free(priv_key); | |
1081 | return NULL; | |
0f113f3e MC |
1082 | } |
1083 | ||
1084 | int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out) | |
1085 | { | |
1086 | int ret = 0, ok = 0; | |
1087 | unsigned char *buffer = NULL; | |
30cd4ff2 | 1088 | size_t buf_len = 0, tmp_len, bn_len; |
0f113f3e MC |
1089 | EC_PRIVATEKEY *priv_key = NULL; |
1090 | ||
1091 | if (a == NULL || a->group == NULL || a->priv_key == NULL || | |
1092 | (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) { | |
1093 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1094 | goto err; | |
1095 | } | |
1096 | ||
1097 | if ((priv_key = EC_PRIVATEKEY_new()) == NULL) { | |
1098 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1099 | goto err; | |
1100 | } | |
1101 | ||
1102 | priv_key->version = a->version; | |
1103 | ||
30cd4ff2 DE |
1104 | bn_len = (size_t)BN_num_bytes(a->priv_key); |
1105 | ||
1106 | /* Octetstring may need leading zeros if BN is to short */ | |
1107 | ||
1108 | buf_len = (EC_GROUP_get_degree(a->group) + 7) / 8; | |
1109 | ||
1110 | if (bn_len > buf_len) { | |
1111 | ECerr(EC_F_I2D_ECPRIVATEKEY, EC_R_BUFFER_TOO_SMALL); | |
1112 | goto err; | |
1113 | } | |
1114 | ||
0f113f3e MC |
1115 | buffer = OPENSSL_malloc(buf_len); |
1116 | if (buffer == NULL) { | |
1117 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1118 | goto err; | |
1119 | } | |
1120 | ||
30cd4ff2 | 1121 | if (!BN_bn2bin(a->priv_key, buffer + buf_len - bn_len)) { |
0f113f3e MC |
1122 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_BN_LIB); |
1123 | goto err; | |
1124 | } | |
1125 | ||
30cd4ff2 DE |
1126 | if (buf_len - bn_len > 0) { |
1127 | memset(buffer, 0, buf_len - bn_len); | |
1128 | } | |
1129 | ||
f422a514 | 1130 | if (!ASN1_OCTET_STRING_set(priv_key->privateKey, buffer, buf_len)) { |
0f113f3e MC |
1131 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB); |
1132 | goto err; | |
1133 | } | |
1134 | ||
1135 | if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) { | |
1136 | if ((priv_key->parameters = | |
1137 | ec_asn1_group2pkparameters(a->group, | |
1138 | priv_key->parameters)) == NULL) { | |
1139 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1140 | goto err; | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) { | |
f422a514 | 1145 | priv_key->publicKey = ASN1_BIT_STRING_new(); |
0f113f3e MC |
1146 | if (priv_key->publicKey == NULL) { |
1147 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1148 | goto err; | |
1149 | } | |
1150 | ||
1151 | tmp_len = EC_POINT_point2oct(a->group, a->pub_key, | |
1152 | a->conv_form, NULL, 0, NULL); | |
1153 | ||
1154 | if (tmp_len > buf_len) { | |
1155 | unsigned char *tmp_buffer = OPENSSL_realloc(buffer, tmp_len); | |
1156 | if (!tmp_buffer) { | |
1157 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1158 | goto err; | |
1159 | } | |
1160 | buffer = tmp_buffer; | |
1161 | buf_len = tmp_len; | |
1162 | } | |
1163 | ||
1164 | if (!EC_POINT_point2oct(a->group, a->pub_key, | |
1165 | a->conv_form, buffer, buf_len, NULL)) { | |
1166 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1167 | goto err; | |
1168 | } | |
1169 | ||
1170 | priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
1171 | priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
f422a514 | 1172 | if (!ASN1_BIT_STRING_set(priv_key->publicKey, buffer, buf_len)) { |
0f113f3e MC |
1173 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB); |
1174 | goto err; | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) { | |
1179 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1180 | goto err; | |
1181 | } | |
1182 | ok = 1; | |
1183 | err: | |
b548a1f1 | 1184 | OPENSSL_free(buffer); |
25aaa98a | 1185 | EC_PRIVATEKEY_free(priv_key); |
0f113f3e MC |
1186 | return (ok ? ret : 0); |
1187 | } | |
14a7cfb3 BM |
1188 | |
1189 | int i2d_ECParameters(EC_KEY *a, unsigned char **out) | |
0f113f3e MC |
1190 | { |
1191 | if (a == NULL) { | |
1192 | ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
1193 | return 0; | |
1194 | } | |
1195 | return i2d_ECPKParameters(a->group, out); | |
1196 | } | |
14a7cfb3 BM |
1197 | |
1198 | EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len) | |
0f113f3e MC |
1199 | { |
1200 | EC_KEY *ret; | |
1201 | ||
1202 | if (in == NULL || *in == NULL) { | |
1203 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
1204 | return NULL; | |
1205 | } | |
1206 | ||
1207 | if (a == NULL || *a == NULL) { | |
1208 | if ((ret = EC_KEY_new()) == NULL) { | |
1209 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE); | |
1210 | return NULL; | |
1211 | } | |
0f113f3e MC |
1212 | } else |
1213 | ret = *a; | |
1214 | ||
1215 | if (!d2i_ECPKParameters(&ret->group, in, len)) { | |
1216 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB); | |
5e5d53d3 MC |
1217 | if (a == NULL || *a != ret) |
1218 | EC_KEY_free(ret); | |
0f113f3e MC |
1219 | return NULL; |
1220 | } | |
1221 | ||
5e5d53d3 MC |
1222 | if (a) |
1223 | *a = ret; | |
1224 | ||
0f113f3e MC |
1225 | return ret; |
1226 | } | |
14a7cfb3 | 1227 | |
62e3163b | 1228 | EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len) |
0f113f3e MC |
1229 | { |
1230 | EC_KEY *ret = NULL; | |
1231 | ||
1232 | if (a == NULL || (*a) == NULL || (*a)->group == NULL) { | |
1233 | /* | |
1234 | * sorry, but a EC_GROUP-structur is necessary to set the public key | |
1235 | */ | |
1236 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1237 | return 0; | |
1238 | } | |
1239 | ret = *a; | |
1240 | if (ret->pub_key == NULL && | |
1241 | (ret->pub_key = EC_POINT_new(ret->group)) == NULL) { | |
1242 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); | |
1243 | return 0; | |
1244 | } | |
1245 | if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL)) { | |
1246 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB); | |
1247 | return 0; | |
1248 | } | |
1249 | /* save the point conversion form */ | |
1250 | ret->conv_form = (point_conversion_form_t) (*in[0] & ~0x01); | |
1251 | *in += len; | |
1252 | return ret; | |
1253 | } | |
14a7cfb3 | 1254 | |
62e3163b | 1255 | int i2o_ECPublicKey(EC_KEY *a, unsigned char **out) |
0f113f3e MC |
1256 | { |
1257 | size_t buf_len = 0; | |
1258 | int new_buffer = 0; | |
1259 | ||
1260 | if (a == NULL) { | |
1261 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1262 | return 0; | |
1263 | } | |
1264 | ||
1265 | buf_len = EC_POINT_point2oct(a->group, a->pub_key, | |
1266 | a->conv_form, NULL, 0, NULL); | |
1267 | ||
1268 | if (out == NULL || buf_len == 0) | |
1269 | /* out == NULL => just return the length of the octet string */ | |
1270 | return buf_len; | |
1271 | ||
1272 | if (*out == NULL) { | |
1273 | if ((*out = OPENSSL_malloc(buf_len)) == NULL) { | |
1274 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); | |
1275 | return 0; | |
1276 | } | |
1277 | new_buffer = 1; | |
1278 | } | |
1279 | if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form, | |
1280 | *out, buf_len, NULL)) { | |
1281 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB); | |
1282 | if (new_buffer) { | |
1283 | OPENSSL_free(*out); | |
1284 | *out = NULL; | |
1285 | } | |
1286 | return 0; | |
1287 | } | |
1288 | if (!new_buffer) | |
1289 | *out += buf_len; | |
1290 | return buf_len; | |
1291 | } | |
2d3d00dc | 1292 | |
2d3d00dc DSH |
1293 | ASN1_SEQUENCE(ECDSA_SIG) = { |
1294 | ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM), | |
1295 | ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM) | |
1296 | } static_ASN1_SEQUENCE_END(ECDSA_SIG) | |
1297 | ||
1298 | DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG) | |
1299 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG) | |
1300 | IMPLEMENT_ASN1_FUNCTIONS_const(ECDSA_SIG) | |
7236e3c8 DSH |
1301 | |
1302 | void ECDSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, ECDSA_SIG *sig) | |
1303 | { | |
91e7bcc2 | 1304 | if (pr != NULL) |
7236e3c8 | 1305 | *pr = sig->r; |
91e7bcc2 | 1306 | if (ps != NULL) |
7236e3c8 DSH |
1307 | *ps = sig->s; |
1308 | } | |
cf517a6d DSH |
1309 | |
1310 | int ECDSA_size(const EC_KEY *r) | |
1311 | { | |
1312 | int ret, i; | |
1313 | ASN1_INTEGER bs; | |
cf517a6d DSH |
1314 | unsigned char buf[4]; |
1315 | const EC_GROUP *group; | |
1316 | ||
1317 | if (r == NULL) | |
1318 | return 0; | |
1319 | group = EC_KEY_get0_group(r); | |
1320 | if (group == NULL) | |
1321 | return 0; | |
1322 | ||
be2e334f DSH |
1323 | i = EC_GROUP_order_bits(group); |
1324 | if (i == 0) | |
cf517a6d | 1325 | return 0; |
cf517a6d DSH |
1326 | bs.length = (i + 7) / 8; |
1327 | bs.data = buf; | |
1328 | bs.type = V_ASN1_INTEGER; | |
1329 | /* If the top bit is set the asn1 encoding is 1 larger. */ | |
1330 | buf[0] = 0xff; | |
1331 | ||
1332 | i = i2d_ASN1_INTEGER(&bs, NULL); | |
1333 | i += i; /* r and s */ | |
1334 | ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE); | |
cf517a6d DSH |
1335 | return (ret); |
1336 | } |