]>
Commit | Line | Data |
---|---|---|
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 | |
40720ce3 | 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) |
40720ce3 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 | } | |
8aefe253 | 85 | |
34f1f2a8 | 86 | int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k) |
40720ce3 MC |
87 | { |
88 | if (group == NULL) | |
89 | return 0; | |
90 | ||
91 | if (EC_GROUP_method_of(group)->group_set_curve != | |
92 | ec_GF2m_simple_group_set_curve || !((group->poly[0] != 0) | |
93 | && (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 | } | |
34f1f2a8 BM |
105 | |
106 | int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1, | |
40720ce3 MC |
107 | unsigned int *k2, unsigned int *k3) |
108 | { | |
109 | if (group == NULL) | |
110 | return 0; | |
111 | ||
112 | if (EC_GROUP_method_of(group)->group_set_curve != | |
113 | ec_GF2m_simple_group_set_curve || !((group->poly[0] != 0) | |
114 | && (group->poly[1] != 0) | |
115 | && (group->poly[2] != 0) | |
116 | && (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 | } | |
8aefe253 | 132 | |
012c86ab | 133 | /* some structures needed for the asn1 encoding */ |
012c86ab | 134 | typedef struct x9_62_pentanomial_st { |
40720ce3 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 { |
40720ce3 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 { | |
40720ce3 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 { |
40720ce3 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 { |
40720ce3 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 { | |
40720ce3 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 { | |
40720ce3 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) = { | |
40720ce3 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) | |
37af03d3 | 206 | } 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) = { |
40720ce3 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) = { | |
40720ce3 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) | |
012c86ab BM |
223 | } ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO) |
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) = { | |
40720ce3 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) = { |
40720ce3 MC |
236 | ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT), |
237 | ASN1_ADB_OBJECT(X9_62_FIELDID) | |
37af03d3 | 238 | } ASN1_SEQUENCE_END(X9_62_FIELDID) |
012c86ab BM |
239 | |
240 | ASN1_SEQUENCE(X9_62_CURVE) = { | |
40720ce3 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) | |
012c86ab BM |
244 | } ASN1_SEQUENCE_END(X9_62_CURVE) |
245 | ||
012c86ab | 246 | ASN1_SEQUENCE(ECPARAMETERS) = { |
40720ce3 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) | |
012c86ab BM |
253 | } ASN1_SEQUENCE_END(ECPARAMETERS) |
254 | ||
37af03d3 GT |
255 | DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) |
256 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) | |
012c86ab BM |
257 | |
258 | ASN1_CHOICE(ECPKPARAMETERS) = { | |
40720ce3 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) | |
012c86ab BM |
262 | } ASN1_CHOICE_END(ECPKPARAMETERS) |
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) = { |
40720ce3 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) | |
0bee0e62 BM |
273 | } ASN1_SEQUENCE_END(EC_PRIVATEKEY) |
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 | |
40720ce3 | 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 *); |
40720ce3 | 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 *); |
40720ce3 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) |
40720ce3 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) */ | |
319 | if (field->fieldType != NULL) | |
320 | ASN1_OBJECT_free(field->fieldType); | |
321 | if (field->p.other != NULL) | |
322 | ASN1_TYPE_free(field->p.other); | |
323 | ||
324 | nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group)); | |
325 | /* set OID for the field */ | |
326 | if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) { | |
327 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
328 | goto err; | |
329 | } | |
330 | ||
331 | if (nid == NID_X9_62_prime_field) { | |
332 | if ((tmp = BN_new()) == NULL) { | |
333 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
334 | goto err; | |
335 | } | |
336 | /* the parameters are specified by the prime number p */ | |
337 | if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL)) { | |
338 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); | |
339 | goto err; | |
340 | } | |
341 | /* set the prime number */ | |
342 | field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL); | |
343 | if (field->p.prime == NULL) { | |
344 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB); | |
345 | goto err; | |
346 | } | |
347 | } else { /* nid == NID_X9_62_characteristic_two_field */ | |
348 | ||
349 | int field_type; | |
350 | X9_62_CHARACTERISTIC_TWO *char_two; | |
351 | ||
352 | field->p.char_two = X9_62_CHARACTERISTIC_TWO_new(); | |
353 | char_two = field->p.char_two; | |
354 | ||
355 | if (char_two == NULL) { | |
356 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
357 | goto err; | |
358 | } | |
359 | ||
360 | char_two->m = (long)EC_GROUP_get_degree(group); | |
361 | ||
362 | field_type = EC_GROUP_get_basis_type(group); | |
363 | ||
364 | if (field_type == 0) { | |
365 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); | |
366 | goto err; | |
367 | } | |
368 | /* set base type OID */ | |
369 | if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) { | |
370 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
371 | goto err; | |
372 | } | |
373 | ||
374 | if (field_type == NID_X9_62_tpBasis) { | |
375 | unsigned int k; | |
376 | ||
377 | if (!EC_GROUP_get_trinomial_basis(group, &k)) | |
378 | goto err; | |
379 | ||
380 | char_two->p.tpBasis = ASN1_INTEGER_new(); | |
381 | if (!char_two->p.tpBasis) { | |
382 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
383 | goto err; | |
384 | } | |
385 | if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) { | |
386 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB); | |
387 | goto err; | |
388 | } | |
389 | } else if (field_type == NID_X9_62_ppBasis) { | |
390 | unsigned int k1, k2, k3; | |
391 | ||
392 | if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3)) | |
393 | goto err; | |
394 | ||
395 | char_two->p.ppBasis = X9_62_PENTANOMIAL_new(); | |
396 | if (!char_two->p.ppBasis) { | |
397 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
398 | goto err; | |
399 | } | |
400 | ||
401 | /* set k? values */ | |
402 | char_two->p.ppBasis->k1 = (long)k1; | |
403 | char_two->p.ppBasis->k2 = (long)k2; | |
404 | char_two->p.ppBasis->k3 = (long)k3; | |
405 | } else { /* field_type == NID_X9_62_onBasis */ | |
406 | ||
407 | /* for ONB the parameters are (asn1) NULL */ | |
408 | char_two->p.onBasis = ASN1_NULL_new(); | |
409 | if (!char_two->p.onBasis) { | |
410 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
411 | goto err; | |
412 | } | |
413 | } | |
414 | } | |
415 | ||
416 | ok = 1; | |
417 | ||
418 | err:if (tmp) | |
419 | BN_free(tmp); | |
420 | return (ok); | |
012c86ab BM |
421 | } |
422 | ||
37af03d3 | 423 | static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve) |
40720ce3 MC |
424 | { |
425 | int ok = 0, nid; | |
426 | BIGNUM *tmp_1 = NULL, *tmp_2 = NULL; | |
427 | unsigned char *buffer_1 = NULL, *buffer_2 = NULL, | |
428 | *a_buf = NULL, *b_buf = NULL; | |
429 | size_t len_1, len_2; | |
430 | unsigned char char_zero = 0; | |
431 | ||
432 | if (!group || !curve || !curve->a || !curve->b) | |
433 | return 0; | |
434 | ||
435 | if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) { | |
436 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
437 | goto err; | |
438 | } | |
439 | ||
440 | nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group)); | |
441 | ||
442 | /* get a and b */ | |
443 | if (nid == NID_X9_62_prime_field) { | |
444 | if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL)) { | |
445 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB); | |
446 | goto err; | |
447 | } | |
448 | } else { /* nid == NID_X9_62_characteristic_two_field */ | |
449 | ||
450 | if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL)) { | |
451 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB); | |
452 | goto err; | |
453 | } | |
454 | } | |
455 | ||
456 | len_1 = (size_t)BN_num_bytes(tmp_1); | |
457 | len_2 = (size_t)BN_num_bytes(tmp_2); | |
458 | ||
459 | if (len_1 == 0) { | |
460 | /* len_1 == 0 => a == 0 */ | |
461 | a_buf = &char_zero; | |
462 | len_1 = 1; | |
463 | } else { | |
464 | if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL) { | |
465 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
466 | goto err; | |
467 | } | |
468 | if ((len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0) { | |
469 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB); | |
470 | goto err; | |
471 | } | |
472 | a_buf = buffer_1; | |
473 | } | |
474 | ||
475 | if (len_2 == 0) { | |
476 | /* len_2 == 0 => b == 0 */ | |
477 | b_buf = &char_zero; | |
478 | len_2 = 1; | |
479 | } else { | |
480 | if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL) { | |
481 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
482 | goto err; | |
483 | } | |
484 | if ((len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0) { | |
485 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB); | |
486 | goto err; | |
487 | } | |
488 | b_buf = buffer_2; | |
489 | } | |
490 | ||
491 | /* set a and b */ | |
492 | if (!M_ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) || | |
493 | !M_ASN1_OCTET_STRING_set(curve->b, b_buf, len_2)) { | |
494 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); | |
495 | goto err; | |
496 | } | |
497 | ||
498 | /* set the seed (optional) */ | |
499 | if (group->seed) { | |
500 | if (!curve->seed) | |
501 | if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) { | |
502 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
503 | goto err; | |
504 | } | |
505 | curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
506 | curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
507 | if (!ASN1_BIT_STRING_set(curve->seed, group->seed, | |
508 | (int)group->seed_len)) { | |
509 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); | |
510 | goto err; | |
511 | } | |
512 | } else { | |
513 | if (curve->seed) { | |
514 | ASN1_BIT_STRING_free(curve->seed); | |
515 | curve->seed = NULL; | |
516 | } | |
517 | } | |
518 | ||
519 | ok = 1; | |
520 | ||
521 | err:if (buffer_1) | |
522 | OPENSSL_free(buffer_1); | |
523 | if (buffer_2) | |
524 | OPENSSL_free(buffer_2); | |
525 | if (tmp_1) | |
526 | BN_free(tmp_1); | |
527 | if (tmp_2) | |
528 | BN_free(tmp_2); | |
529 | return (ok); | |
530 | } | |
012c86ab BM |
531 | |
532 | static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group, | |
533 | ECPARAMETERS *param) | |
40720ce3 MC |
534 | { |
535 | int ok = 0; | |
536 | size_t len = 0; | |
537 | ECPARAMETERS *ret = NULL; | |
538 | BIGNUM *tmp = NULL; | |
539 | unsigned char *buffer = NULL; | |
540 | const EC_POINT *point = NULL; | |
541 | point_conversion_form_t form; | |
542 | ||
543 | if ((tmp = BN_new()) == NULL) { | |
544 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
545 | goto err; | |
546 | } | |
547 | ||
548 | if (param == NULL) { | |
549 | if ((ret = ECPARAMETERS_new()) == NULL) { | |
550 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
551 | goto err; | |
552 | } | |
553 | } else | |
554 | ret = param; | |
555 | ||
556 | /* set the version (always one) */ | |
557 | ret->version = (long)0x1; | |
558 | ||
559 | /* set the fieldID */ | |
560 | if (!ec_asn1_group2fieldid(group, ret->fieldID)) { | |
561 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
562 | goto err; | |
563 | } | |
564 | ||
565 | /* set the curve */ | |
566 | if (!ec_asn1_group2curve(group, ret->curve)) { | |
567 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
568 | goto err; | |
569 | } | |
570 | ||
571 | /* set the base point */ | |
572 | if ((point = EC_GROUP_get0_generator(group)) == NULL) { | |
573 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, EC_R_UNDEFINED_GENERATOR); | |
574 | goto err; | |
575 | } | |
576 | ||
577 | form = EC_GROUP_get_point_conversion_form(group); | |
578 | ||
579 | len = EC_POINT_point2oct(group, point, form, NULL, len, NULL); | |
580 | if (len == 0) { | |
581 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
582 | goto err; | |
583 | } | |
584 | if ((buffer = OPENSSL_malloc(len)) == NULL) { | |
585 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
586 | goto err; | |
587 | } | |
588 | if (!EC_POINT_point2oct(group, point, form, buffer, len, NULL)) { | |
589 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
590 | goto err; | |
591 | } | |
592 | if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) { | |
593 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
594 | goto err; | |
595 | } | |
596 | if (!ASN1_OCTET_STRING_set(ret->base, buffer, len)) { | |
597 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
598 | goto err; | |
599 | } | |
600 | ||
601 | /* set the order */ | |
602 | if (!EC_GROUP_get_order(group, tmp, NULL)) { | |
603 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
604 | goto err; | |
605 | } | |
606 | ret->order = BN_to_ASN1_INTEGER(tmp, ret->order); | |
607 | if (ret->order == NULL) { | |
608 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
609 | goto err; | |
610 | } | |
611 | ||
612 | /* set the cofactor (optional) */ | |
613 | if (EC_GROUP_get_cofactor(group, tmp, NULL)) { | |
614 | ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor); | |
615 | if (ret->cofactor == NULL) { | |
616 | ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
617 | goto err; | |
618 | } | |
619 | } | |
620 | ||
621 | ok = 1; | |
622 | ||
623 | err:if (!ok) { | |
624 | if (ret && !param) | |
625 | ECPARAMETERS_free(ret); | |
626 | ret = NULL; | |
627 | } | |
628 | if (tmp) | |
629 | BN_free(tmp); | |
630 | if (buffer) | |
631 | OPENSSL_free(buffer); | |
632 | return (ret); | |
633 | } | |
634 | ||
635 | ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *group, | |
012c86ab | 636 | ECPKPARAMETERS *params) |
40720ce3 MC |
637 | { |
638 | int ok = 1, tmp; | |
639 | ECPKPARAMETERS *ret = params; | |
640 | ||
641 | if (ret == NULL) { | |
642 | if ((ret = ECPKPARAMETERS_new()) == NULL) { | |
643 | ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS, ERR_R_MALLOC_FAILURE); | |
644 | return NULL; | |
645 | } | |
646 | } else { | |
647 | if (ret->type == 0 && ret->value.named_curve) | |
648 | ASN1_OBJECT_free(ret->value.named_curve); | |
649 | else if (ret->type == 1 && ret->value.parameters) | |
650 | ECPARAMETERS_free(ret->value.parameters); | |
651 | } | |
652 | ||
653 | if (EC_GROUP_get_asn1_flag(group)) { | |
654 | /* | |
655 | * use the asn1 OID to describe the the elliptic curve parameters | |
656 | */ | |
657 | tmp = EC_GROUP_get_curve_name(group); | |
658 | if (tmp) { | |
659 | ret->type = 0; | |
660 | if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL) | |
661 | ok = 0; | |
662 | } else | |
663 | /* we don't kmow the nid => ERROR */ | |
664 | ok = 0; | |
665 | } else { | |
666 | /* use the ECPARAMETERS structure */ | |
667 | ret->type = 1; | |
668 | if ((ret->value.parameters = | |
669 | ec_asn1_group2parameters(group, NULL)) == NULL) | |
670 | ok = 0; | |
671 | } | |
672 | ||
673 | if (!ok) { | |
674 | ECPKPARAMETERS_free(ret); | |
675 | return NULL; | |
676 | } | |
677 | return ret; | |
678 | } | |
012c86ab BM |
679 | |
680 | static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *params) | |
40720ce3 MC |
681 | { |
682 | int ok = 0, tmp; | |
683 | EC_GROUP *ret = NULL; | |
684 | BIGNUM *p = NULL, *a = NULL, *b = NULL; | |
685 | EC_POINT *point = NULL; | |
686 | long field_bits; | |
687 | ||
688 | if (!params->fieldID || !params->fieldID->fieldType || | |
689 | !params->fieldID->p.ptr) { | |
690 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
691 | goto err; | |
692 | } | |
693 | ||
694 | /* now extract the curve parameters a and b */ | |
695 | if (!params->curve || !params->curve->a || | |
696 | !params->curve->a->data || !params->curve->b || | |
697 | !params->curve->b->data) { | |
698 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
699 | goto err; | |
700 | } | |
701 | a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL); | |
702 | if (a == NULL) { | |
703 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB); | |
704 | goto err; | |
705 | } | |
706 | b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL); | |
707 | if (b == NULL) { | |
708 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB); | |
709 | goto err; | |
710 | } | |
711 | ||
712 | /* get the field parameters */ | |
713 | tmp = OBJ_obj2nid(params->fieldID->fieldType); | |
714 | ||
715 | if (tmp == NID_X9_62_characteristic_two_field) { | |
716 | X9_62_CHARACTERISTIC_TWO *char_two; | |
717 | ||
718 | char_two = params->fieldID->p.char_two; | |
719 | ||
720 | field_bits = char_two->m; | |
721 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
722 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE); | |
723 | goto err; | |
724 | } | |
725 | ||
726 | if ((p = BN_new()) == NULL) { | |
727 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE); | |
728 | goto err; | |
729 | } | |
730 | ||
731 | /* get the base type */ | |
732 | tmp = OBJ_obj2nid(char_two->type); | |
733 | ||
734 | if (tmp == NID_X9_62_tpBasis) { | |
735 | long tmp_long; | |
736 | ||
737 | if (!char_two->p.tpBasis) { | |
738 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
739 | goto err; | |
740 | } | |
741 | ||
742 | tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis); | |
743 | ||
744 | if (!(char_two->m > tmp_long && tmp_long > 0)) { | |
745 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, | |
746 | EC_R_INVALID_TRINOMIAL_BASIS); | |
747 | goto err; | |
748 | } | |
749 | ||
750 | /* create the polynomial */ | |
751 | if (!BN_set_bit(p, (int)char_two->m)) | |
752 | goto err; | |
753 | if (!BN_set_bit(p, (int)tmp_long)) | |
754 | goto err; | |
755 | if (!BN_set_bit(p, 0)) | |
756 | goto err; | |
757 | } else if (tmp == NID_X9_62_ppBasis) { | |
758 | X9_62_PENTANOMIAL *penta; | |
759 | ||
760 | penta = char_two->p.ppBasis; | |
761 | if (!penta) { | |
762 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
763 | goto err; | |
764 | } | |
765 | ||
766 | if (! | |
767 | (char_two->m > penta->k3 && penta->k3 > penta->k2 | |
768 | && penta->k2 > penta->k1 && penta->k1 > 0)) { | |
769 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, | |
770 | EC_R_INVALID_PENTANOMIAL_BASIS); | |
771 | goto err; | |
772 | } | |
773 | ||
774 | /* create the polynomial */ | |
775 | if (!BN_set_bit(p, (int)char_two->m)) | |
776 | goto err; | |
777 | if (!BN_set_bit(p, (int)penta->k1)) | |
778 | goto err; | |
779 | if (!BN_set_bit(p, (int)penta->k2)) | |
780 | goto err; | |
781 | if (!BN_set_bit(p, (int)penta->k3)) | |
782 | goto err; | |
783 | if (!BN_set_bit(p, 0)) | |
784 | goto err; | |
785 | } else if (tmp == NID_X9_62_onBasis) { | |
786 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_NOT_IMPLEMENTED); | |
787 | goto err; | |
788 | } else { /* error */ | |
789 | ||
790 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
791 | goto err; | |
792 | } | |
793 | ||
794 | /* create the EC_GROUP structure */ | |
795 | ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL); | |
796 | } else if (tmp == NID_X9_62_prime_field) { | |
797 | /* we have a curve over a prime field */ | |
798 | /* extract the prime number */ | |
799 | if (!params->fieldID->p.prime) { | |
800 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
801 | goto err; | |
802 | } | |
803 | p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL); | |
804 | if (p == NULL) { | |
805 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
806 | goto err; | |
807 | } | |
808 | ||
809 | if (BN_is_negative(p) || BN_is_zero(p)) { | |
810 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD); | |
811 | goto err; | |
812 | } | |
813 | ||
814 | field_bits = BN_num_bits(p); | |
815 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
816 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARGE); | |
817 | goto err; | |
818 | } | |
819 | ||
820 | /* create the EC_GROUP structure */ | |
821 | ret = EC_GROUP_new_curve_GFp(p, a, b, NULL); | |
822 | } else { | |
823 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD); | |
824 | goto err; | |
825 | } | |
826 | ||
827 | if (ret == NULL) { | |
828 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
829 | goto err; | |
830 | } | |
831 | ||
832 | /* extract seed (optional) */ | |
833 | if (params->curve->seed != NULL) { | |
834 | if (ret->seed != NULL) | |
835 | OPENSSL_free(ret->seed); | |
836 | if (!(ret->seed = OPENSSL_malloc(params->curve->seed->length))) { | |
837 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILURE); | |
838 | goto err; | |
839 | } | |
840 | memcpy(ret->seed, params->curve->seed->data, | |
841 | params->curve->seed->length); | |
842 | ret->seed_len = params->curve->seed->length; | |
843 | } | |
844 | ||
845 | if (!params->order || !params->base || !params->base->data) { | |
846 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
847 | goto err; | |
848 | } | |
849 | ||
850 | if ((point = EC_POINT_new(ret)) == NULL) | |
851 | goto err; | |
852 | ||
853 | /* set the point conversion form */ | |
854 | EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t) | |
855 | (params->base->data[0] & ~0x01)); | |
856 | ||
857 | /* extract the ec point */ | |
858 | if (!EC_POINT_oct2point(ret, point, params->base->data, | |
859 | params->base->length, NULL)) { | |
860 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
861 | goto err; | |
862 | } | |
863 | ||
864 | /* extract the order */ | |
865 | if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) { | |
866 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
867 | goto err; | |
868 | } | |
869 | if (BN_is_negative(a) || BN_is_zero(a)) { | |
870 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER); | |
871 | goto err; | |
872 | } | |
873 | if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */ | |
874 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER); | |
875 | goto err; | |
876 | } | |
877 | ||
878 | /* extract the cofactor (optional) */ | |
879 | if (params->cofactor == NULL) { | |
880 | if (b) { | |
881 | BN_free(b); | |
882 | b = NULL; | |
883 | } | |
884 | } else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) { | |
885 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
886 | goto err; | |
887 | } | |
888 | /* set the generator, order and cofactor (if present) */ | |
889 | if (!EC_GROUP_set_generator(ret, point, a, b)) { | |
890 | ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
891 | goto err; | |
892 | } | |
893 | ||
894 | ok = 1; | |
895 | ||
896 | err:if (!ok) { | |
897 | if (ret) | |
898 | EC_GROUP_clear_free(ret); | |
899 | ret = NULL; | |
900 | } | |
901 | ||
902 | if (p) | |
903 | BN_free(p); | |
904 | if (a) | |
905 | BN_free(a); | |
906 | if (b) | |
907 | BN_free(b); | |
908 | if (point) | |
909 | EC_POINT_free(point); | |
910 | return (ret); | |
012c86ab BM |
911 | } |
912 | ||
7e31164a | 913 | EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *params) |
40720ce3 MC |
914 | { |
915 | EC_GROUP *ret = NULL; | |
916 | int tmp = 0; | |
917 | ||
918 | if (params == NULL) { | |
919 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_MISSING_PARAMETERS); | |
920 | return NULL; | |
921 | } | |
922 | ||
923 | if (params->type == 0) { /* the curve is given by an OID */ | |
924 | tmp = OBJ_obj2nid(params->value.named_curve); | |
925 | if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) { | |
926 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, | |
927 | EC_R_EC_GROUP_NEW_BY_NAME_FAILURE); | |
928 | return NULL; | |
929 | } | |
930 | EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE); | |
931 | } else if (params->type == 1) { /* the parameters are given by a | |
932 | * ECPARAMETERS structure */ | |
933 | ret = ec_asn1_parameters2group(params->value.parameters); | |
934 | if (!ret) { | |
935 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, ERR_R_EC_LIB); | |
936 | return NULL; | |
937 | } | |
938 | EC_GROUP_set_asn1_flag(ret, 0x0); | |
939 | } else if (params->type == 2) { /* implicitlyCA */ | |
940 | return NULL; | |
941 | } else { | |
942 | ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
943 | return NULL; | |
944 | } | |
945 | ||
946 | return ret; | |
947 | } | |
012c86ab | 948 | |
14a7cfb3 | 949 | /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */ |
012c86ab BM |
950 | |
951 | EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len) | |
40720ce3 MC |
952 | { |
953 | EC_GROUP *group = NULL; | |
954 | ECPKPARAMETERS *params = NULL; | |
955 | ||
956 | if ((params = d2i_ECPKPARAMETERS(NULL, in, len)) == NULL) { | |
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 | return NULL; | |
965 | } | |
966 | ||
967 | if (a && *a) | |
968 | EC_GROUP_clear_free(*a); | |
969 | if (a) | |
970 | *a = group; | |
971 | ||
972 | ECPKPARAMETERS_free(params); | |
973 | return (group); | |
974 | } | |
012c86ab | 975 | |
14a7cfb3 | 976 | int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out) |
40720ce3 MC |
977 | { |
978 | int ret = 0; | |
979 | ECPKPARAMETERS *tmp = ec_asn1_group2pkparameters(a, NULL); | |
980 | if (tmp == NULL) { | |
981 | ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE); | |
982 | return 0; | |
983 | } | |
984 | if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) { | |
985 | ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE); | |
986 | ECPKPARAMETERS_free(tmp); | |
987 | return 0; | |
988 | } | |
989 | ECPKPARAMETERS_free(tmp); | |
990 | return (ret); | |
991 | } | |
012c86ab | 992 | |
14a7cfb3 BM |
993 | /* some EC_KEY functions */ |
994 | ||
995 | EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len) | |
40720ce3 MC |
996 | { |
997 | int ok = 0; | |
998 | EC_KEY *ret = NULL; | |
999 | EC_PRIVATEKEY *priv_key = NULL; | |
1000 | ||
1001 | if ((priv_key = EC_PRIVATEKEY_new()) == NULL) { | |
1002 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1003 | return NULL; | |
1004 | } | |
1005 | ||
1006 | if ((priv_key = d2i_EC_PRIVATEKEY(&priv_key, in, len)) == NULL) { | |
1007 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1008 | EC_PRIVATEKEY_free(priv_key); | |
1009 | return NULL; | |
1010 | } | |
1011 | ||
1012 | if (a == NULL || *a == NULL) { | |
1013 | if ((ret = EC_KEY_new()) == NULL) { | |
1014 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1015 | goto err; | |
1016 | } | |
40720ce3 MC |
1017 | } else |
1018 | ret = *a; | |
1019 | ||
1020 | if (priv_key->parameters) { | |
1021 | if (ret->group) | |
1022 | EC_GROUP_clear_free(ret->group); | |
1023 | ret->group = ec_asn1_pkparameters2group(priv_key->parameters); | |
1024 | } | |
1025 | ||
1026 | if (ret->group == NULL) { | |
1027 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1028 | goto err; | |
1029 | } | |
1030 | ||
1031 | ret->version = priv_key->version; | |
1032 | ||
1033 | if (priv_key->privateKey) { | |
1034 | ret->priv_key = BN_bin2bn(M_ASN1_STRING_data(priv_key->privateKey), | |
1035 | M_ASN1_STRING_length(priv_key->privateKey), | |
1036 | ret->priv_key); | |
1037 | if (ret->priv_key == NULL) { | |
1038 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_BN_LIB); | |
1039 | goto err; | |
1040 | } | |
1041 | } else { | |
1042 | ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY); | |
1043 | goto err; | |
1044 | } | |
1045 | ||
1046 | if (priv_key->publicKey) { | |
1047 | const unsigned char *pub_oct; | |
1048 | size_t pub_oct_len; | |
1049 | ||
1050 | if (ret->pub_key) | |
1051 | EC_POINT_clear_free(ret->pub_key); | |
1052 | ret->pub_key = EC_POINT_new(ret->group); | |
1053 | if (ret->pub_key == NULL) { | |
1054 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1055 | goto err; | |
1056 | } | |
1057 | pub_oct = M_ASN1_STRING_data(priv_key->publicKey); | |
1058 | pub_oct_len = M_ASN1_STRING_length(priv_key->publicKey); | |
1059 | /* save the point conversion form */ | |
1060 | ret->conv_form = (point_conversion_form_t) (pub_oct[0] & ~0x01); | |
1061 | if (!EC_POINT_oct2point(ret->group, ret->pub_key, | |
1062 | pub_oct, pub_oct_len, NULL)) { | |
1063 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1064 | goto err; | |
1065 | } | |
1066 | } | |
1067 | ||
1b4a8df3 MC |
1068 | if (a) |
1069 | *a = ret; | |
40720ce3 MC |
1070 | ok = 1; |
1071 | err: | |
1072 | if (!ok) { | |
1b4a8df3 | 1073 | if (ret && (a == NULL || *a != ret)) |
40720ce3 MC |
1074 | EC_KEY_free(ret); |
1075 | ret = NULL; | |
1076 | } | |
1077 | ||
1078 | if (priv_key) | |
1079 | EC_PRIVATEKEY_free(priv_key); | |
1080 | ||
1081 | return (ret); | |
1082 | } | |
1083 | ||
1084 | int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out) | |
1085 | { | |
1086 | int ret = 0, ok = 0; | |
1087 | unsigned char *buffer = NULL; | |
1088 | size_t buf_len = 0, tmp_len; | |
1089 | EC_PRIVATEKEY *priv_key = NULL; | |
1090 | ||
1091 | if (a == NULL || a->group == NULL || a->priv_key == NULL) { | |
1092 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1093 | goto err; | |
1094 | } | |
1095 | ||
1096 | if ((priv_key = EC_PRIVATEKEY_new()) == NULL) { | |
1097 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1098 | goto err; | |
1099 | } | |
1100 | ||
1101 | priv_key->version = a->version; | |
1102 | ||
1103 | buf_len = (size_t)BN_num_bytes(a->priv_key); | |
1104 | buffer = OPENSSL_malloc(buf_len); | |
1105 | if (buffer == NULL) { | |
1106 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1107 | goto err; | |
1108 | } | |
1109 | ||
1110 | if (!BN_bn2bin(a->priv_key, buffer)) { | |
1111 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_BN_LIB); | |
1112 | goto err; | |
1113 | } | |
1114 | ||
1115 | if (!M_ASN1_OCTET_STRING_set(priv_key->privateKey, buffer, buf_len)) { | |
1116 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB); | |
1117 | goto err; | |
1118 | } | |
1119 | ||
1120 | if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) { | |
1121 | if ((priv_key->parameters = | |
1122 | ec_asn1_group2pkparameters(a->group, | |
1123 | priv_key->parameters)) == NULL) { | |
1124 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1125 | goto err; | |
1126 | } | |
1127 | } | |
1128 | ||
1129 | if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) { | |
1130 | priv_key->publicKey = M_ASN1_BIT_STRING_new(); | |
1131 | if (priv_key->publicKey == NULL) { | |
1132 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1133 | goto err; | |
1134 | } | |
1135 | ||
1136 | tmp_len = EC_POINT_point2oct(a->group, a->pub_key, | |
1137 | a->conv_form, NULL, 0, NULL); | |
1138 | ||
1139 | if (tmp_len > buf_len) { | |
1140 | unsigned char *tmp_buffer = OPENSSL_realloc(buffer, tmp_len); | |
1141 | if (!tmp_buffer) { | |
1142 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1143 | goto err; | |
1144 | } | |
1145 | buffer = tmp_buffer; | |
1146 | buf_len = tmp_len; | |
1147 | } | |
1148 | ||
1149 | if (!EC_POINT_point2oct(a->group, a->pub_key, | |
1150 | a->conv_form, buffer, buf_len, NULL)) { | |
1151 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1152 | goto err; | |
1153 | } | |
1154 | ||
1155 | priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
1156 | priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
1157 | if (!M_ASN1_BIT_STRING_set(priv_key->publicKey, buffer, buf_len)) { | |
1158 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB); | |
1159 | goto err; | |
1160 | } | |
1161 | } | |
1162 | ||
1163 | if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) { | |
1164 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1165 | goto err; | |
1166 | } | |
1167 | ok = 1; | |
1168 | err: | |
1169 | if (buffer) | |
1170 | OPENSSL_free(buffer); | |
1171 | if (priv_key) | |
1172 | EC_PRIVATEKEY_free(priv_key); | |
1173 | return (ok ? ret : 0); | |
1174 | } | |
14a7cfb3 BM |
1175 | |
1176 | int i2d_ECParameters(EC_KEY *a, unsigned char **out) | |
40720ce3 MC |
1177 | { |
1178 | if (a == NULL) { | |
1179 | ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
1180 | return 0; | |
1181 | } | |
1182 | return i2d_ECPKParameters(a->group, out); | |
1183 | } | |
14a7cfb3 BM |
1184 | |
1185 | EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len) | |
40720ce3 MC |
1186 | { |
1187 | EC_KEY *ret; | |
1188 | ||
1189 | if (in == NULL || *in == NULL) { | |
1190 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
1191 | return NULL; | |
1192 | } | |
1193 | ||
1194 | if (a == NULL || *a == NULL) { | |
1195 | if ((ret = EC_KEY_new()) == NULL) { | |
1196 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE); | |
1197 | return NULL; | |
1198 | } | |
40720ce3 MC |
1199 | } else |
1200 | ret = *a; | |
1201 | ||
1202 | if (!d2i_ECPKParameters(&ret->group, in, len)) { | |
1203 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB); | |
c380bff8 MC |
1204 | if (a == NULL || *a != ret) |
1205 | EC_KEY_free(ret); | |
40720ce3 MC |
1206 | return NULL; |
1207 | } | |
1208 | ||
c380bff8 MC |
1209 | if (a) |
1210 | *a = ret; | |
1211 | ||
40720ce3 MC |
1212 | return ret; |
1213 | } | |
14a7cfb3 | 1214 | |
62e3163b | 1215 | EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len) |
40720ce3 MC |
1216 | { |
1217 | EC_KEY *ret = NULL; | |
1218 | ||
1219 | if (a == NULL || (*a) == NULL || (*a)->group == NULL) { | |
1220 | /* | |
1221 | * sorry, but a EC_GROUP-structur is necessary to set the public key | |
1222 | */ | |
1223 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1224 | return 0; | |
1225 | } | |
1226 | ret = *a; | |
1227 | if (ret->pub_key == NULL && | |
1228 | (ret->pub_key = EC_POINT_new(ret->group)) == NULL) { | |
1229 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); | |
1230 | return 0; | |
1231 | } | |
1232 | if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL)) { | |
1233 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB); | |
1234 | return 0; | |
1235 | } | |
1236 | /* save the point conversion form */ | |
1237 | ret->conv_form = (point_conversion_form_t) (*in[0] & ~0x01); | |
1238 | *in += len; | |
1239 | return ret; | |
1240 | } | |
14a7cfb3 | 1241 | |
62e3163b | 1242 | int i2o_ECPublicKey(EC_KEY *a, unsigned char **out) |
40720ce3 MC |
1243 | { |
1244 | size_t buf_len = 0; | |
1245 | int new_buffer = 0; | |
1246 | ||
1247 | if (a == NULL) { | |
1248 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | buf_len = EC_POINT_point2oct(a->group, a->pub_key, | |
1253 | a->conv_form, NULL, 0, NULL); | |
1254 | ||
1255 | if (out == NULL || buf_len == 0) | |
1256 | /* out == NULL => just return the length of the octet string */ | |
1257 | return buf_len; | |
1258 | ||
1259 | if (*out == NULL) { | |
1260 | if ((*out = OPENSSL_malloc(buf_len)) == NULL) { | |
1261 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); | |
1262 | return 0; | |
1263 | } | |
1264 | new_buffer = 1; | |
1265 | } | |
1266 | if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form, | |
1267 | *out, buf_len, NULL)) { | |
1268 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB); | |
1269 | OPENSSL_free(*out); | |
1270 | *out = NULL; | |
1271 | return 0; | |
1272 | } | |
1273 | if (!new_buffer) | |
1274 | *out += buf_len; | |
1275 | return buf_len; | |
1276 | } |