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Commit | Line | Data |
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7e31164a | 1 | /* |
aa6bb135 | 2 | * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved. |
012c86ab | 3 | * |
aa6bb135 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
012c86ab BM |
8 | */ |
9 | ||
5454829a | 10 | #include <string.h> |
012c86ab | 11 | #include "ec_lcl.h" |
0bee0e62 | 12 | #include <openssl/err.h> |
012c86ab BM |
13 | #include <openssl/asn1t.h> |
14 | #include <openssl/objects.h> | |
677963e5 | 15 | #include "internal/nelem.h" |
012c86ab | 16 | |
34f1f2a8 | 17 | int EC_GROUP_get_basis_type(const EC_GROUP *group) |
0f113f3e | 18 | { |
57f48f93 | 19 | int i; |
0f113f3e MC |
20 | |
21 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != | |
22 | NID_X9_62_characteristic_two_field) | |
23 | /* everything else is currently not supported */ | |
24 | return 0; | |
25 | ||
57f48f93 RS |
26 | /* Find the last non-zero element of group->poly[] */ |
27 | for (i = 0; | |
50799f35 | 28 | i < (int)OSSL_NELEM(group->poly) && group->poly[i] != 0; |
57f48f93 RS |
29 | i++) |
30 | continue; | |
0f113f3e MC |
31 | |
32 | if (i == 4) | |
33 | return NID_X9_62_ppBasis; | |
34 | else if (i == 2) | |
35 | return NID_X9_62_tpBasis; | |
36 | else | |
37 | /* everything else is currently not supported */ | |
38 | return 0; | |
39 | } | |
40 | ||
b3310161 | 41 | #ifndef OPENSSL_NO_EC2M |
34f1f2a8 | 42 | int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k) |
0f113f3e MC |
43 | { |
44 | if (group == NULL) | |
45 | return 0; | |
46 | ||
47 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != | |
48 | NID_X9_62_characteristic_two_field | |
49 | || !((group->poly[0] != 0) && (group->poly[1] != 0) | |
50 | && (group->poly[2] == 0))) { | |
51 | ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS, | |
52 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
53 | return 0; | |
54 | } | |
55 | ||
56 | if (k) | |
57 | *k = group->poly[1]; | |
58 | ||
59 | return 1; | |
60 | } | |
61 | ||
34f1f2a8 | 62 | int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1, |
0f113f3e MC |
63 | unsigned int *k2, unsigned int *k3) |
64 | { | |
65 | if (group == NULL) | |
66 | return 0; | |
67 | ||
68 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != | |
69 | NID_X9_62_characteristic_two_field | |
70 | || !((group->poly[0] != 0) && (group->poly[1] != 0) | |
71 | && (group->poly[2] != 0) && (group->poly[3] != 0) | |
72 | && (group->poly[4] == 0))) { | |
73 | ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS, | |
74 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
75 | return 0; | |
76 | } | |
77 | ||
78 | if (k1) | |
79 | *k1 = group->poly[3]; | |
80 | if (k2) | |
81 | *k2 = group->poly[2]; | |
82 | if (k3) | |
83 | *k3 = group->poly[1]; | |
84 | ||
85 | return 1; | |
86 | } | |
b3310161 | 87 | #endif |
8aefe253 | 88 | |
012c86ab | 89 | /* some structures needed for the asn1 encoding */ |
012c86ab | 90 | typedef struct x9_62_pentanomial_st { |
6a32a3c0 RL |
91 | int32_t k1; |
92 | int32_t k2; | |
93 | int32_t k3; | |
0f113f3e | 94 | } X9_62_PENTANOMIAL; |
012c86ab | 95 | |
37af03d3 | 96 | typedef struct x9_62_characteristic_two_st { |
6a32a3c0 | 97 | int32_t m; |
0f113f3e MC |
98 | ASN1_OBJECT *type; |
99 | union { | |
100 | char *ptr; | |
101 | /* NID_X9_62_onBasis */ | |
102 | ASN1_NULL *onBasis; | |
103 | /* NID_X9_62_tpBasis */ | |
104 | ASN1_INTEGER *tpBasis; | |
105 | /* NID_X9_62_ppBasis */ | |
106 | X9_62_PENTANOMIAL *ppBasis; | |
107 | /* anything else */ | |
108 | ASN1_TYPE *other; | |
109 | } p; | |
110 | } X9_62_CHARACTERISTIC_TWO; | |
37af03d3 GT |
111 | |
112 | typedef struct x9_62_fieldid_st { | |
0f113f3e MC |
113 | ASN1_OBJECT *fieldType; |
114 | union { | |
115 | char *ptr; | |
116 | /* NID_X9_62_prime_field */ | |
117 | ASN1_INTEGER *prime; | |
118 | /* NID_X9_62_characteristic_two_field */ | |
119 | X9_62_CHARACTERISTIC_TWO *char_two; | |
120 | /* anything else */ | |
121 | ASN1_TYPE *other; | |
122 | } p; | |
123 | } X9_62_FIELDID; | |
37af03d3 | 124 | |
012c86ab | 125 | typedef struct x9_62_curve_st { |
0f113f3e MC |
126 | ASN1_OCTET_STRING *a; |
127 | ASN1_OCTET_STRING *b; | |
128 | ASN1_BIT_STRING *seed; | |
129 | } X9_62_CURVE; | |
012c86ab | 130 | |
03f880e4 | 131 | struct ec_parameters_st { |
6a32a3c0 | 132 | int32_t version; |
0f113f3e MC |
133 | X9_62_FIELDID *fieldID; |
134 | X9_62_CURVE *curve; | |
135 | ASN1_OCTET_STRING *base; | |
136 | ASN1_INTEGER *order; | |
137 | ASN1_INTEGER *cofactor; | |
03f880e4 | 138 | } /* ECPARAMETERS */ ; |
012c86ab BM |
139 | |
140 | struct ecpk_parameters_st { | |
0f113f3e MC |
141 | int type; |
142 | union { | |
143 | ASN1_OBJECT *named_curve; | |
144 | ECPARAMETERS *parameters; | |
145 | ASN1_NULL *implicitlyCA; | |
146 | } value; | |
147 | } /* ECPKPARAMETERS */ ; | |
012c86ab | 148 | |
14a7cfb3 BM |
149 | /* SEC1 ECPrivateKey */ |
150 | typedef struct ec_privatekey_st { | |
6a32a3c0 | 151 | int32_t version; |
0f113f3e MC |
152 | ASN1_OCTET_STRING *privateKey; |
153 | ECPKPARAMETERS *parameters; | |
154 | ASN1_BIT_STRING *publicKey; | |
155 | } EC_PRIVATEKEY; | |
14a7cfb3 | 156 | |
37af03d3 GT |
157 | /* the OpenSSL ASN.1 definitions */ |
158 | ASN1_SEQUENCE(X9_62_PENTANOMIAL) = { | |
9612e157 RL |
159 | ASN1_EMBED(X9_62_PENTANOMIAL, k1, INT32), |
160 | ASN1_EMBED(X9_62_PENTANOMIAL, k2, INT32), | |
161 | ASN1_EMBED(X9_62_PENTANOMIAL, k3, INT32) | |
df2ee0e2 | 162 | } static_ASN1_SEQUENCE_END(X9_62_PENTANOMIAL) |
012c86ab | 163 | |
37af03d3 GT |
164 | DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL) |
165 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL) | |
166 | ||
167 | ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY); | |
012c86ab | 168 | |
37af03d3 | 169 | ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = { |
0f113f3e MC |
170 | ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)), |
171 | ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)), | |
172 | ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL)) | |
37af03d3 | 173 | } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL); |
012c86ab BM |
174 | |
175 | ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = { | |
9612e157 | 176 | ASN1_EMBED(X9_62_CHARACTERISTIC_TWO, m, INT32), |
0f113f3e MC |
177 | ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT), |
178 | ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO) | |
df2ee0e2 | 179 | } static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO) |
012c86ab | 180 | |
37af03d3 GT |
181 | DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO) |
182 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO) | |
012c86ab | 183 | |
37af03d3 GT |
184 | ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY); |
185 | ||
186 | ASN1_ADB(X9_62_FIELDID) = { | |
0f113f3e MC |
187 | ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)), |
188 | ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO)) | |
37af03d3 | 189 | } ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL); |
012c86ab | 190 | |
37af03d3 | 191 | ASN1_SEQUENCE(X9_62_FIELDID) = { |
0f113f3e MC |
192 | ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT), |
193 | ASN1_ADB_OBJECT(X9_62_FIELDID) | |
df2ee0e2 | 194 | } static_ASN1_SEQUENCE_END(X9_62_FIELDID) |
012c86ab BM |
195 | |
196 | ASN1_SEQUENCE(X9_62_CURVE) = { | |
0f113f3e MC |
197 | ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING), |
198 | ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING), | |
199 | ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING) | |
df2ee0e2 | 200 | } static_ASN1_SEQUENCE_END(X9_62_CURVE) |
012c86ab | 201 | |
012c86ab | 202 | ASN1_SEQUENCE(ECPARAMETERS) = { |
9612e157 | 203 | ASN1_EMBED(ECPARAMETERS, version, INT32), |
0f113f3e MC |
204 | ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID), |
205 | ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE), | |
206 | ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING), | |
207 | ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER), | |
208 | ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER) | |
60b350a3 | 209 | } ASN1_SEQUENCE_END(ECPARAMETERS) |
012c86ab | 210 | |
37af03d3 GT |
211 | DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) |
212 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) | |
012c86ab BM |
213 | |
214 | ASN1_CHOICE(ECPKPARAMETERS) = { | |
0f113f3e MC |
215 | ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT), |
216 | ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS), | |
217 | ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL) | |
60b350a3 | 218 | } ASN1_CHOICE_END(ECPKPARAMETERS) |
012c86ab BM |
219 | |
220 | DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS) | |
14a7cfb3 | 221 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS) |
012c86ab BM |
222 | IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS) |
223 | ||
0bee0e62 | 224 | ASN1_SEQUENCE(EC_PRIVATEKEY) = { |
9612e157 | 225 | ASN1_EMBED(EC_PRIVATEKEY, version, INT32), |
0f113f3e MC |
226 | ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING), |
227 | ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0), | |
228 | ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1) | |
df2ee0e2 | 229 | } static_ASN1_SEQUENCE_END(EC_PRIVATEKEY) |
0bee0e62 | 230 | |
14a7cfb3 BM |
231 | DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY) |
232 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY) | |
0bee0e62 BM |
233 | IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY) |
234 | ||
7e31164a | 235 | /* some declarations of internal function */ |
012c86ab | 236 | |
0f113f3e | 237 | /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */ |
37af03d3 | 238 | static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *); |
0f113f3e | 239 | /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */ |
37af03d3 | 240 | static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *); |
7e31164a BM |
241 | |
242 | /* the function definitions */ | |
012c86ab | 243 | |
37af03d3 | 244 | static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field) |
0f113f3e MC |
245 | { |
246 | int ok = 0, nid; | |
247 | BIGNUM *tmp = NULL; | |
248 | ||
249 | if (group == NULL || field == NULL) | |
250 | return 0; | |
251 | ||
252 | /* clear the old values (if necessary) */ | |
0dfb9398 | 253 | ASN1_OBJECT_free(field->fieldType); |
2ace7450 | 254 | ASN1_TYPE_free(field->p.other); |
0f113f3e MC |
255 | |
256 | nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group)); | |
257 | /* set OID for the field */ | |
258 | if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) { | |
259 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
260 | goto err; | |
261 | } | |
262 | ||
263 | if (nid == NID_X9_62_prime_field) { | |
264 | if ((tmp = BN_new()) == NULL) { | |
265 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
266 | goto err; | |
267 | } | |
268 | /* the parameters are specified by the prime number p */ | |
269 | if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL)) { | |
270 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); | |
271 | goto err; | |
272 | } | |
273 | /* set the prime number */ | |
274 | field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL); | |
275 | if (field->p.prime == NULL) { | |
276 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB); | |
277 | goto err; | |
278 | } | |
6903e2e7 | 279 | } else if (nid == NID_X9_62_characteristic_two_field) |
b3310161 | 280 | #ifdef OPENSSL_NO_EC2M |
0f113f3e MC |
281 | { |
282 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED); | |
283 | goto err; | |
284 | } | |
b3310161 | 285 | #else |
0f113f3e MC |
286 | { |
287 | int field_type; | |
288 | X9_62_CHARACTERISTIC_TWO *char_two; | |
289 | ||
290 | field->p.char_two = X9_62_CHARACTERISTIC_TWO_new(); | |
291 | char_two = field->p.char_two; | |
292 | ||
293 | if (char_two == NULL) { | |
294 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
295 | goto err; | |
296 | } | |
297 | ||
298 | char_two->m = (long)EC_GROUP_get_degree(group); | |
299 | ||
300 | field_type = EC_GROUP_get_basis_type(group); | |
301 | ||
302 | if (field_type == 0) { | |
303 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); | |
304 | goto err; | |
305 | } | |
306 | /* set base type OID */ | |
307 | if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) { | |
308 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
309 | goto err; | |
310 | } | |
311 | ||
312 | if (field_type == NID_X9_62_tpBasis) { | |
313 | unsigned int k; | |
314 | ||
315 | if (!EC_GROUP_get_trinomial_basis(group, &k)) | |
316 | goto err; | |
317 | ||
318 | char_two->p.tpBasis = ASN1_INTEGER_new(); | |
90945fa3 | 319 | if (char_two->p.tpBasis == NULL) { |
0f113f3e MC |
320 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); |
321 | goto err; | |
322 | } | |
323 | if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) { | |
324 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB); | |
325 | goto err; | |
326 | } | |
327 | } else if (field_type == NID_X9_62_ppBasis) { | |
328 | unsigned int k1, k2, k3; | |
329 | ||
330 | if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3)) | |
331 | goto err; | |
332 | ||
333 | char_two->p.ppBasis = X9_62_PENTANOMIAL_new(); | |
90945fa3 | 334 | if (char_two->p.ppBasis == NULL) { |
0f113f3e MC |
335 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); |
336 | goto err; | |
337 | } | |
338 | ||
339 | /* set k? values */ | |
340 | char_two->p.ppBasis->k1 = (long)k1; | |
341 | char_two->p.ppBasis->k2 = (long)k2; | |
342 | char_two->p.ppBasis->k3 = (long)k3; | |
343 | } else { /* field_type == NID_X9_62_onBasis */ | |
344 | ||
345 | /* for ONB the parameters are (asn1) NULL */ | |
346 | char_two->p.onBasis = ASN1_NULL_new(); | |
90945fa3 | 347 | if (char_two->p.onBasis == NULL) { |
0f113f3e MC |
348 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); |
349 | goto err; | |
350 | } | |
351 | } | |
352 | } | |
b3310161 | 353 | #endif |
6903e2e7 DSH |
354 | else { |
355 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_UNSUPPORTED_FIELD); | |
356 | goto err; | |
357 | } | |
012c86ab | 358 | |
0f113f3e | 359 | ok = 1; |
012c86ab | 360 | |
23a1d5e9 RS |
361 | err: |
362 | BN_free(tmp); | |
26a7d938 | 363 | return ok; |
012c86ab BM |
364 | } |
365 | ||
37af03d3 | 366 | static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve) |
0f113f3e MC |
367 | { |
368 | int ok = 0, nid; | |
369 | BIGNUM *tmp_1 = NULL, *tmp_2 = NULL; | |
370 | unsigned char *buffer_1 = NULL, *buffer_2 = NULL, | |
371 | *a_buf = NULL, *b_buf = NULL; | |
372 | size_t len_1, len_2; | |
373 | unsigned char char_zero = 0; | |
374 | ||
375 | if (!group || !curve || !curve->a || !curve->b) | |
376 | return 0; | |
377 | ||
378 | if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) { | |
379 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
380 | goto err; | |
381 | } | |
382 | ||
383 | nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group)); | |
384 | ||
385 | /* get a and b */ | |
386 | if (nid == NID_X9_62_prime_field) { | |
387 | if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL)) { | |
388 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB); | |
389 | goto err; | |
390 | } | |
391 | } | |
b3310161 | 392 | #ifndef OPENSSL_NO_EC2M |
0f113f3e MC |
393 | else { /* nid == NID_X9_62_characteristic_two_field */ |
394 | ||
395 | if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL)) { | |
396 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB); | |
397 | goto err; | |
398 | } | |
399 | } | |
b3310161 | 400 | #endif |
0f113f3e MC |
401 | len_1 = (size_t)BN_num_bytes(tmp_1); |
402 | len_2 = (size_t)BN_num_bytes(tmp_2); | |
403 | ||
404 | if (len_1 == 0) { | |
405 | /* len_1 == 0 => a == 0 */ | |
406 | a_buf = &char_zero; | |
407 | len_1 = 1; | |
408 | } else { | |
409 | if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL) { | |
410 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
411 | goto err; | |
412 | } | |
413 | if ((len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0) { | |
414 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB); | |
415 | goto err; | |
416 | } | |
417 | a_buf = buffer_1; | |
418 | } | |
419 | ||
420 | if (len_2 == 0) { | |
421 | /* len_2 == 0 => b == 0 */ | |
422 | b_buf = &char_zero; | |
423 | len_2 = 1; | |
424 | } else { | |
425 | if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL) { | |
426 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
427 | goto err; | |
428 | } | |
429 | if ((len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0) { | |
430 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB); | |
431 | goto err; | |
432 | } | |
433 | b_buf = buffer_2; | |
434 | } | |
435 | ||
436 | /* set a and b */ | |
f422a514 DSH |
437 | if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) || |
438 | !ASN1_OCTET_STRING_set(curve->b, b_buf, len_2)) { | |
0f113f3e MC |
439 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); |
440 | goto err; | |
441 | } | |
442 | ||
443 | /* set the seed (optional) */ | |
444 | if (group->seed) { | |
445 | if (!curve->seed) | |
446 | if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) { | |
447 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
448 | goto err; | |
449 | } | |
450 | curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
451 | curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
452 | if (!ASN1_BIT_STRING_set(curve->seed, group->seed, | |
453 | (int)group->seed_len)) { | |
454 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); | |
455 | goto err; | |
456 | } | |
457 | } else { | |
2ace7450 RS |
458 | ASN1_BIT_STRING_free(curve->seed); |
459 | curve->seed = NULL; | |
0f113f3e MC |
460 | } |
461 | ||
462 | ok = 1; | |
463 | ||
23a1d5e9 | 464 | err: |
b548a1f1 RS |
465 | OPENSSL_free(buffer_1); |
466 | OPENSSL_free(buffer_2); | |
23a1d5e9 RS |
467 | BN_free(tmp_1); |
468 | BN_free(tmp_2); | |
26a7d938 | 469 | return ok; |
0f113f3e | 470 | } |
012c86ab | 471 | |
60b350a3 RS |
472 | ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group, |
473 | ECPARAMETERS *params) | |
0f113f3e | 474 | { |
0f113f3e MC |
475 | size_t len = 0; |
476 | ECPARAMETERS *ret = NULL; | |
be2e334f | 477 | const BIGNUM *tmp; |
0f113f3e MC |
478 | unsigned char *buffer = NULL; |
479 | const EC_POINT *point = NULL; | |
480 | point_conversion_form_t form; | |
481 | ||
60b350a3 | 482 | if (params == NULL) { |
0f113f3e | 483 | if ((ret = ECPARAMETERS_new()) == NULL) { |
60b350a3 | 484 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
485 | goto err; |
486 | } | |
487 | } else | |
60b350a3 | 488 | ret = params; |
0f113f3e MC |
489 | |
490 | /* set the version (always one) */ | |
491 | ret->version = (long)0x1; | |
492 | ||
493 | /* set the fieldID */ | |
494 | if (!ec_asn1_group2fieldid(group, ret->fieldID)) { | |
60b350a3 | 495 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
496 | goto err; |
497 | } | |
498 | ||
499 | /* set the curve */ | |
500 | if (!ec_asn1_group2curve(group, ret->curve)) { | |
60b350a3 | 501 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
502 | goto err; |
503 | } | |
504 | ||
505 | /* set the base point */ | |
506 | if ((point = EC_GROUP_get0_generator(group)) == NULL) { | |
60b350a3 | 507 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, EC_R_UNDEFINED_GENERATOR); |
0f113f3e MC |
508 | goto err; |
509 | } | |
510 | ||
511 | form = EC_GROUP_get_point_conversion_form(group); | |
512 | ||
981bd8a2 | 513 | len = EC_POINT_point2buf(group, point, form, &buffer, NULL); |
0f113f3e | 514 | if (len == 0) { |
60b350a3 | 515 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
516 | goto err; |
517 | } | |
0f113f3e | 518 | if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) { |
0110a470 | 519 | OPENSSL_free(buffer); |
60b350a3 | 520 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
521 | goto err; |
522 | } | |
0110a470 | 523 | ASN1_STRING_set0(ret->base, buffer, len); |
0f113f3e MC |
524 | |
525 | /* set the order */ | |
be2e334f DSH |
526 | tmp = EC_GROUP_get0_order(group); |
527 | if (tmp == NULL) { | |
60b350a3 | 528 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
529 | goto err; |
530 | } | |
531 | ret->order = BN_to_ASN1_INTEGER(tmp, ret->order); | |
532 | if (ret->order == NULL) { | |
60b350a3 | 533 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB); |
0f113f3e MC |
534 | goto err; |
535 | } | |
536 | ||
537 | /* set the cofactor (optional) */ | |
be2e334f DSH |
538 | tmp = EC_GROUP_get0_cofactor(group); |
539 | if (tmp != NULL) { | |
0f113f3e MC |
540 | ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor); |
541 | if (ret->cofactor == NULL) { | |
60b350a3 | 542 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB); |
0f113f3e MC |
543 | goto err; |
544 | } | |
545 | } | |
546 | ||
23a1d5e9 | 547 | return ret; |
0f113f3e | 548 | |
23a1d5e9 | 549 | err: |
60b350a3 | 550 | if (params == NULL) |
23a1d5e9 | 551 | ECPARAMETERS_free(ret); |
23a1d5e9 | 552 | return NULL; |
0f113f3e MC |
553 | } |
554 | ||
60b350a3 RS |
555 | ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group, |
556 | ECPKPARAMETERS *params) | |
0f113f3e MC |
557 | { |
558 | int ok = 1, tmp; | |
559 | ECPKPARAMETERS *ret = params; | |
560 | ||
561 | if (ret == NULL) { | |
562 | if ((ret = ECPKPARAMETERS_new()) == NULL) { | |
60b350a3 | 563 | ECerr(EC_F_EC_GROUP_GET_ECPKPARAMETERS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
564 | return NULL; |
565 | } | |
566 | } else { | |
0dfb9398 | 567 | if (ret->type == 0) |
0f113f3e MC |
568 | ASN1_OBJECT_free(ret->value.named_curve); |
569 | else if (ret->type == 1 && ret->value.parameters) | |
570 | ECPARAMETERS_free(ret->value.parameters); | |
571 | } | |
572 | ||
573 | if (EC_GROUP_get_asn1_flag(group)) { | |
574 | /* | |
575 | * use the asn1 OID to describe the the elliptic curve parameters | |
576 | */ | |
577 | tmp = EC_GROUP_get_curve_name(group); | |
578 | if (tmp) { | |
579 | ret->type = 0; | |
580 | if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL) | |
581 | ok = 0; | |
582 | } else | |
0d4fb843 | 583 | /* we don't know the nid => ERROR */ |
0f113f3e MC |
584 | ok = 0; |
585 | } else { | |
586 | /* use the ECPARAMETERS structure */ | |
587 | ret->type = 1; | |
588 | if ((ret->value.parameters = | |
60b350a3 | 589 | EC_GROUP_get_ecparameters(group, NULL)) == NULL) |
0f113f3e MC |
590 | ok = 0; |
591 | } | |
592 | ||
593 | if (!ok) { | |
594 | ECPKPARAMETERS_free(ret); | |
595 | return NULL; | |
596 | } | |
597 | return ret; | |
598 | } | |
012c86ab | 599 | |
60b350a3 | 600 | EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params) |
0f113f3e MC |
601 | { |
602 | int ok = 0, tmp; | |
603 | EC_GROUP *ret = NULL; | |
604 | BIGNUM *p = NULL, *a = NULL, *b = NULL; | |
605 | EC_POINT *point = NULL; | |
606 | long field_bits; | |
607 | ||
608 | if (!params->fieldID || !params->fieldID->fieldType || | |
609 | !params->fieldID->p.ptr) { | |
60b350a3 | 610 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
611 | goto err; |
612 | } | |
613 | ||
614 | /* now extract the curve parameters a and b */ | |
615 | if (!params->curve || !params->curve->a || | |
616 | !params->curve->a->data || !params->curve->b || | |
617 | !params->curve->b->data) { | |
60b350a3 | 618 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
619 | goto err; |
620 | } | |
621 | a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL); | |
622 | if (a == NULL) { | |
60b350a3 | 623 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB); |
0f113f3e MC |
624 | goto err; |
625 | } | |
626 | b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL); | |
627 | if (b == NULL) { | |
60b350a3 | 628 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB); |
0f113f3e MC |
629 | goto err; |
630 | } | |
631 | ||
632 | /* get the field parameters */ | |
633 | tmp = OBJ_obj2nid(params->fieldID->fieldType); | |
634 | if (tmp == NID_X9_62_characteristic_two_field) | |
b3310161 | 635 | #ifdef OPENSSL_NO_EC2M |
0f113f3e | 636 | { |
60b350a3 | 637 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_GF2M_NOT_SUPPORTED); |
0f113f3e MC |
638 | goto err; |
639 | } | |
b3310161 | 640 | #else |
0f113f3e MC |
641 | { |
642 | X9_62_CHARACTERISTIC_TWO *char_two; | |
643 | ||
644 | char_two = params->fieldID->p.char_two; | |
645 | ||
646 | field_bits = char_two->m; | |
647 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
60b350a3 | 648 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE); |
0f113f3e MC |
649 | goto err; |
650 | } | |
651 | ||
652 | if ((p = BN_new()) == NULL) { | |
60b350a3 | 653 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
654 | goto err; |
655 | } | |
656 | ||
657 | /* get the base type */ | |
658 | tmp = OBJ_obj2nid(char_two->type); | |
659 | ||
660 | if (tmp == NID_X9_62_tpBasis) { | |
661 | long tmp_long; | |
662 | ||
663 | if (!char_two->p.tpBasis) { | |
60b350a3 | 664 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
665 | goto err; |
666 | } | |
667 | ||
668 | tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis); | |
669 | ||
670 | if (!(char_two->m > tmp_long && tmp_long > 0)) { | |
60b350a3 | 671 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, |
0f113f3e MC |
672 | EC_R_INVALID_TRINOMIAL_BASIS); |
673 | goto err; | |
674 | } | |
675 | ||
676 | /* create the polynomial */ | |
677 | if (!BN_set_bit(p, (int)char_two->m)) | |
678 | goto err; | |
679 | if (!BN_set_bit(p, (int)tmp_long)) | |
680 | goto err; | |
681 | if (!BN_set_bit(p, 0)) | |
682 | goto err; | |
683 | } else if (tmp == NID_X9_62_ppBasis) { | |
684 | X9_62_PENTANOMIAL *penta; | |
685 | ||
686 | penta = char_two->p.ppBasis; | |
687 | if (!penta) { | |
60b350a3 | 688 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
689 | goto err; |
690 | } | |
691 | ||
692 | if (! | |
693 | (char_two->m > penta->k3 && penta->k3 > penta->k2 | |
694 | && penta->k2 > penta->k1 && penta->k1 > 0)) { | |
60b350a3 | 695 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, |
0f113f3e MC |
696 | EC_R_INVALID_PENTANOMIAL_BASIS); |
697 | goto err; | |
698 | } | |
699 | ||
700 | /* create the polynomial */ | |
701 | if (!BN_set_bit(p, (int)char_two->m)) | |
702 | goto err; | |
703 | if (!BN_set_bit(p, (int)penta->k1)) | |
704 | goto err; | |
705 | if (!BN_set_bit(p, (int)penta->k2)) | |
706 | goto err; | |
707 | if (!BN_set_bit(p, (int)penta->k3)) | |
708 | goto err; | |
709 | if (!BN_set_bit(p, 0)) | |
710 | goto err; | |
711 | } else if (tmp == NID_X9_62_onBasis) { | |
60b350a3 | 712 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_NOT_IMPLEMENTED); |
0f113f3e MC |
713 | goto err; |
714 | } else { /* error */ | |
715 | ||
60b350a3 | 716 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
717 | goto err; |
718 | } | |
719 | ||
720 | /* create the EC_GROUP structure */ | |
721 | ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL); | |
722 | } | |
b3310161 | 723 | #endif |
0f113f3e MC |
724 | else if (tmp == NID_X9_62_prime_field) { |
725 | /* we have a curve over a prime field */ | |
726 | /* extract the prime number */ | |
727 | if (!params->fieldID->p.prime) { | |
60b350a3 | 728 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
729 | goto err; |
730 | } | |
731 | p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL); | |
732 | if (p == NULL) { | |
60b350a3 | 733 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB); |
0f113f3e MC |
734 | goto err; |
735 | } | |
736 | ||
737 | if (BN_is_negative(p) || BN_is_zero(p)) { | |
60b350a3 | 738 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD); |
0f113f3e MC |
739 | goto err; |
740 | } | |
741 | ||
742 | field_bits = BN_num_bits(p); | |
743 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
60b350a3 | 744 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE); |
0f113f3e MC |
745 | goto err; |
746 | } | |
747 | ||
748 | /* create the EC_GROUP structure */ | |
749 | ret = EC_GROUP_new_curve_GFp(p, a, b, NULL); | |
750 | } else { | |
60b350a3 | 751 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD); |
0f113f3e MC |
752 | goto err; |
753 | } | |
754 | ||
755 | if (ret == NULL) { | |
60b350a3 | 756 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
757 | goto err; |
758 | } | |
759 | ||
760 | /* extract seed (optional) */ | |
761 | if (params->curve->seed != NULL) { | |
b548a1f1 | 762 | OPENSSL_free(ret->seed); |
75ebbd9a | 763 | if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL) { |
60b350a3 | 764 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
765 | goto err; |
766 | } | |
767 | memcpy(ret->seed, params->curve->seed->data, | |
768 | params->curve->seed->length); | |
769 | ret->seed_len = params->curve->seed->length; | |
770 | } | |
771 | ||
772 | if (!params->order || !params->base || !params->base->data) { | |
60b350a3 | 773 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
774 | goto err; |
775 | } | |
776 | ||
777 | if ((point = EC_POINT_new(ret)) == NULL) | |
778 | goto err; | |
779 | ||
780 | /* set the point conversion form */ | |
781 | EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t) | |
782 | (params->base->data[0] & ~0x01)); | |
783 | ||
784 | /* extract the ec point */ | |
785 | if (!EC_POINT_oct2point(ret, point, params->base->data, | |
786 | params->base->length, NULL)) { | |
60b350a3 | 787 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
788 | goto err; |
789 | } | |
790 | ||
791 | /* extract the order */ | |
792 | if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) { | |
60b350a3 | 793 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB); |
0f113f3e MC |
794 | goto err; |
795 | } | |
796 | if (BN_is_negative(a) || BN_is_zero(a)) { | |
60b350a3 | 797 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER); |
0f113f3e MC |
798 | goto err; |
799 | } | |
800 | if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */ | |
60b350a3 | 801 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER); |
0f113f3e MC |
802 | goto err; |
803 | } | |
804 | ||
805 | /* extract the cofactor (optional) */ | |
806 | if (params->cofactor == NULL) { | |
23a1d5e9 RS |
807 | BN_free(b); |
808 | b = NULL; | |
0f113f3e | 809 | } else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) { |
60b350a3 | 810 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB); |
0f113f3e MC |
811 | goto err; |
812 | } | |
813 | /* set the generator, order and cofactor (if present) */ | |
814 | if (!EC_GROUP_set_generator(ret, point, a, b)) { | |
60b350a3 | 815 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
816 | goto err; |
817 | } | |
818 | ||
819 | ok = 1; | |
820 | ||
8fdc3734 RS |
821 | err: |
822 | if (!ok) { | |
823 | EC_GROUP_clear_free(ret); | |
0f113f3e MC |
824 | ret = NULL; |
825 | } | |
826 | ||
23a1d5e9 RS |
827 | BN_free(p); |
828 | BN_free(a); | |
829 | BN_free(b); | |
8fdc3734 | 830 | EC_POINT_free(point); |
26a7d938 | 831 | return ret; |
012c86ab BM |
832 | } |
833 | ||
60b350a3 | 834 | EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params) |
0f113f3e MC |
835 | { |
836 | EC_GROUP *ret = NULL; | |
837 | int tmp = 0; | |
838 | ||
839 | if (params == NULL) { | |
60b350a3 | 840 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_MISSING_PARAMETERS); |
0f113f3e MC |
841 | return NULL; |
842 | } | |
843 | ||
844 | if (params->type == 0) { /* the curve is given by an OID */ | |
845 | tmp = OBJ_obj2nid(params->value.named_curve); | |
846 | if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) { | |
60b350a3 | 847 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, |
0f113f3e MC |
848 | EC_R_EC_GROUP_NEW_BY_NAME_FAILURE); |
849 | return NULL; | |
850 | } | |
851 | EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE); | |
852 | } else if (params->type == 1) { /* the parameters are given by a | |
853 | * ECPARAMETERS structure */ | |
60b350a3 | 854 | ret = EC_GROUP_new_from_ecparameters(params->value.parameters); |
0f113f3e | 855 | if (!ret) { |
60b350a3 | 856 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
857 | return NULL; |
858 | } | |
859 | EC_GROUP_set_asn1_flag(ret, 0x0); | |
860 | } else if (params->type == 2) { /* implicitlyCA */ | |
861 | return NULL; | |
862 | } else { | |
60b350a3 | 863 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
864 | return NULL; |
865 | } | |
866 | ||
867 | return ret; | |
868 | } | |
012c86ab | 869 | |
14a7cfb3 | 870 | /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */ |
012c86ab | 871 | |
6343829a | 872 | EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len) |
0f113f3e MC |
873 | { |
874 | EC_GROUP *group = NULL; | |
875 | ECPKPARAMETERS *params = NULL; | |
a46c9789 | 876 | const unsigned char *p = *in; |
0f113f3e | 877 | |
a46c9789 | 878 | if ((params = d2i_ECPKPARAMETERS(NULL, &p, len)) == NULL) { |
0f113f3e MC |
879 | ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE); |
880 | ECPKPARAMETERS_free(params); | |
881 | return NULL; | |
882 | } | |
883 | ||
60b350a3 | 884 | if ((group = EC_GROUP_new_from_ecpkparameters(params)) == NULL) { |
0f113f3e MC |
885 | ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE); |
886 | ECPKPARAMETERS_free(params); | |
887 | return NULL; | |
888 | } | |
889 | ||
8fdc3734 | 890 | if (a) { |
0f113f3e | 891 | EC_GROUP_clear_free(*a); |
0f113f3e | 892 | *a = group; |
8fdc3734 | 893 | } |
0f113f3e MC |
894 | |
895 | ECPKPARAMETERS_free(params); | |
a46c9789 | 896 | *in = p; |
26a7d938 | 897 | return group; |
0f113f3e | 898 | } |
012c86ab | 899 | |
14a7cfb3 | 900 | int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out) |
0f113f3e MC |
901 | { |
902 | int ret = 0; | |
60b350a3 | 903 | ECPKPARAMETERS *tmp = EC_GROUP_get_ecpkparameters(a, NULL); |
0f113f3e MC |
904 | if (tmp == NULL) { |
905 | ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE); | |
906 | return 0; | |
907 | } | |
908 | if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) { | |
909 | ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE); | |
910 | ECPKPARAMETERS_free(tmp); | |
911 | return 0; | |
912 | } | |
913 | ECPKPARAMETERS_free(tmp); | |
26a7d938 | 914 | return ret; |
0f113f3e | 915 | } |
012c86ab | 916 | |
14a7cfb3 BM |
917 | /* some EC_KEY functions */ |
918 | ||
6343829a | 919 | EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len) |
0f113f3e | 920 | { |
0f113f3e MC |
921 | EC_KEY *ret = NULL; |
922 | EC_PRIVATEKEY *priv_key = NULL; | |
a46c9789 | 923 | const unsigned char *p = *in; |
0f113f3e | 924 | |
a46c9789 | 925 | if ((priv_key = d2i_EC_PRIVATEKEY(NULL, &p, len)) == NULL) { |
0f113f3e | 926 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); |
0f113f3e MC |
927 | return NULL; |
928 | } | |
929 | ||
930 | if (a == NULL || *a == NULL) { | |
931 | if ((ret = EC_KEY_new()) == NULL) { | |
932 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
933 | goto err; | |
934 | } | |
0f113f3e MC |
935 | } else |
936 | ret = *a; | |
937 | ||
938 | if (priv_key->parameters) { | |
8fdc3734 | 939 | EC_GROUP_clear_free(ret->group); |
60b350a3 | 940 | ret->group = EC_GROUP_new_from_ecpkparameters(priv_key->parameters); |
0f113f3e MC |
941 | } |
942 | ||
943 | if (ret->group == NULL) { | |
944 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
945 | goto err; | |
946 | } | |
947 | ||
948 | ret->version = priv_key->version; | |
949 | ||
950 | if (priv_key->privateKey) { | |
d810700b | 951 | ASN1_OCTET_STRING *pkey = priv_key->privateKey; |
17ebf85a | 952 | if (EC_KEY_oct2priv(ret, ASN1_STRING_get0_data(pkey), |
d810700b | 953 | ASN1_STRING_length(pkey)) == 0) |
0f113f3e | 954 | goto err; |
0f113f3e MC |
955 | } else { |
956 | ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY); | |
957 | goto err; | |
958 | } | |
959 | ||
8fdc3734 | 960 | EC_POINT_clear_free(ret->pub_key); |
0f113f3e MC |
961 | ret->pub_key = EC_POINT_new(ret->group); |
962 | if (ret->pub_key == NULL) { | |
963 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
964 | goto err; | |
965 | } | |
966 | ||
967 | if (priv_key->publicKey) { | |
968 | const unsigned char *pub_oct; | |
969 | int pub_oct_len; | |
970 | ||
17ebf85a | 971 | pub_oct = ASN1_STRING_get0_data(priv_key->publicKey); |
f422a514 | 972 | pub_oct_len = ASN1_STRING_length(priv_key->publicKey); |
6ea04154 | 973 | if (!EC_KEY_oct2key(ret, pub_oct, pub_oct_len, NULL)) { |
0f113f3e MC |
974 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); |
975 | goto err; | |
976 | } | |
977 | } else { | |
77470e98 DSH |
978 | if (ret->group->meth->keygenpub == NULL |
979 | || ret->group->meth->keygenpub(ret) == 0) | |
6903e2e7 | 980 | goto err; |
0f113f3e MC |
981 | /* Remember the original private-key-only encoding. */ |
982 | ret->enc_flag |= EC_PKEY_NO_PUBKEY; | |
983 | } | |
984 | ||
9e442d48 MC |
985 | if (a) |
986 | *a = ret; | |
25aaa98a | 987 | EC_PRIVATEKEY_free(priv_key); |
a46c9789 | 988 | *in = p; |
26a7d938 | 989 | return ret; |
25aaa98a RS |
990 | |
991 | err: | |
992 | if (a == NULL || *a != ret) | |
993 | EC_KEY_free(ret); | |
994 | EC_PRIVATEKEY_free(priv_key); | |
995 | return NULL; | |
0f113f3e MC |
996 | } |
997 | ||
998 | int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out) | |
999 | { | |
1000 | int ret = 0, ok = 0; | |
7fc7d1a7 | 1001 | unsigned char *priv= NULL, *pub= NULL; |
8a41fa6f | 1002 | size_t privlen = 0, publen = 0; |
7fc7d1a7 | 1003 | |
0f113f3e MC |
1004 | EC_PRIVATEKEY *priv_key = NULL; |
1005 | ||
d810700b | 1006 | if (a == NULL || a->group == NULL || |
0f113f3e MC |
1007 | (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) { |
1008 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1009 | goto err; | |
1010 | } | |
1011 | ||
1012 | if ((priv_key = EC_PRIVATEKEY_new()) == NULL) { | |
1013 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1014 | goto err; | |
1015 | } | |
1016 | ||
1017 | priv_key->version = a->version; | |
1018 | ||
7fc7d1a7 | 1019 | privlen = EC_KEY_priv2buf(a, &priv); |
30cd4ff2 | 1020 | |
7fc7d1a7 | 1021 | if (privlen == 0) { |
d810700b | 1022 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); |
30cd4ff2 DE |
1023 | goto err; |
1024 | } | |
1025 | ||
7fc7d1a7 DSH |
1026 | ASN1_STRING_set0(priv_key->privateKey, priv, privlen); |
1027 | priv = NULL; | |
0f113f3e MC |
1028 | |
1029 | if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) { | |
1030 | if ((priv_key->parameters = | |
60b350a3 | 1031 | EC_GROUP_get_ecpkparameters(a->group, |
0f113f3e MC |
1032 | priv_key->parameters)) == NULL) { |
1033 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1034 | goto err; | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) { | |
f422a514 | 1039 | priv_key->publicKey = ASN1_BIT_STRING_new(); |
0f113f3e MC |
1040 | if (priv_key->publicKey == NULL) { |
1041 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1042 | goto err; | |
1043 | } | |
1044 | ||
7fc7d1a7 | 1045 | publen = EC_KEY_key2buf(a, a->conv_form, &pub, NULL); |
0f113f3e | 1046 | |
7fc7d1a7 | 1047 | if (publen == 0) { |
0f113f3e MC |
1048 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); |
1049 | goto err; | |
1050 | } | |
1051 | ||
1052 | priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
1053 | priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
7fc7d1a7 DSH |
1054 | ASN1_STRING_set0(priv_key->publicKey, pub, publen); |
1055 | pub = NULL; | |
0f113f3e MC |
1056 | } |
1057 | ||
1058 | if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) { | |
1059 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1060 | goto err; | |
1061 | } | |
1062 | ok = 1; | |
1063 | err: | |
7fc7d1a7 DSH |
1064 | OPENSSL_clear_free(priv, privlen); |
1065 | OPENSSL_free(pub); | |
25aaa98a | 1066 | EC_PRIVATEKEY_free(priv_key); |
0f113f3e MC |
1067 | return (ok ? ret : 0); |
1068 | } | |
14a7cfb3 BM |
1069 | |
1070 | int i2d_ECParameters(EC_KEY *a, unsigned char **out) | |
0f113f3e MC |
1071 | { |
1072 | if (a == NULL) { | |
1073 | ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
1074 | return 0; | |
1075 | } | |
1076 | return i2d_ECPKParameters(a->group, out); | |
1077 | } | |
14a7cfb3 BM |
1078 | |
1079 | EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len) | |
0f113f3e MC |
1080 | { |
1081 | EC_KEY *ret; | |
1082 | ||
1083 | if (in == NULL || *in == NULL) { | |
1084 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
1085 | return NULL; | |
1086 | } | |
1087 | ||
1088 | if (a == NULL || *a == NULL) { | |
1089 | if ((ret = EC_KEY_new()) == NULL) { | |
1090 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE); | |
1091 | return NULL; | |
1092 | } | |
0f113f3e MC |
1093 | } else |
1094 | ret = *a; | |
1095 | ||
1096 | if (!d2i_ECPKParameters(&ret->group, in, len)) { | |
1097 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB); | |
5e5d53d3 MC |
1098 | if (a == NULL || *a != ret) |
1099 | EC_KEY_free(ret); | |
0f113f3e MC |
1100 | return NULL; |
1101 | } | |
1102 | ||
5e5d53d3 MC |
1103 | if (a) |
1104 | *a = ret; | |
1105 | ||
0f113f3e MC |
1106 | return ret; |
1107 | } | |
14a7cfb3 | 1108 | |
62e3163b | 1109 | EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len) |
0f113f3e MC |
1110 | { |
1111 | EC_KEY *ret = NULL; | |
1112 | ||
1113 | if (a == NULL || (*a) == NULL || (*a)->group == NULL) { | |
1114 | /* | |
0d4fb843 | 1115 | * sorry, but a EC_GROUP-structure is necessary to set the public key |
0f113f3e MC |
1116 | */ |
1117 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1118 | return 0; | |
1119 | } | |
1120 | ret = *a; | |
6ea04154 | 1121 | if (!EC_KEY_oct2key(ret, *in, len, NULL)) { |
0f113f3e MC |
1122 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB); |
1123 | return 0; | |
1124 | } | |
0f113f3e MC |
1125 | *in += len; |
1126 | return ret; | |
1127 | } | |
14a7cfb3 | 1128 | |
60c25873 | 1129 | int i2o_ECPublicKey(const EC_KEY *a, unsigned char **out) |
0f113f3e MC |
1130 | { |
1131 | size_t buf_len = 0; | |
1132 | int new_buffer = 0; | |
1133 | ||
1134 | if (a == NULL) { | |
1135 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | buf_len = EC_POINT_point2oct(a->group, a->pub_key, | |
1140 | a->conv_form, NULL, 0, NULL); | |
1141 | ||
1142 | if (out == NULL || buf_len == 0) | |
1143 | /* out == NULL => just return the length of the octet string */ | |
1144 | return buf_len; | |
1145 | ||
1146 | if (*out == NULL) { | |
1147 | if ((*out = OPENSSL_malloc(buf_len)) == NULL) { | |
1148 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); | |
1149 | return 0; | |
1150 | } | |
1151 | new_buffer = 1; | |
1152 | } | |
1153 | if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form, | |
1154 | *out, buf_len, NULL)) { | |
1155 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB); | |
1156 | if (new_buffer) { | |
1157 | OPENSSL_free(*out); | |
1158 | *out = NULL; | |
1159 | } | |
1160 | return 0; | |
1161 | } | |
1162 | if (!new_buffer) | |
1163 | *out += buf_len; | |
1164 | return buf_len; | |
1165 | } | |
2d3d00dc | 1166 | |
2d3d00dc DSH |
1167 | ASN1_SEQUENCE(ECDSA_SIG) = { |
1168 | ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM), | |
1169 | ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM) | |
1170 | } static_ASN1_SEQUENCE_END(ECDSA_SIG) | |
1171 | ||
1172 | DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG) | |
1173 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG) | |
8cc44d97 DSH |
1174 | IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSA_SIG, ECDSA_SIG, ECDSA_SIG) |
1175 | ||
1176 | ECDSA_SIG *ECDSA_SIG_new(void) | |
1177 | { | |
1178 | ECDSA_SIG *sig = OPENSSL_zalloc(sizeof(*sig)); | |
1179 | if (sig == NULL) | |
1180 | ECerr(EC_F_ECDSA_SIG_NEW, ERR_R_MALLOC_FAILURE); | |
1181 | return sig; | |
1182 | } | |
1183 | ||
1184 | void ECDSA_SIG_free(ECDSA_SIG *sig) | |
1185 | { | |
1186 | if (sig == NULL) | |
1187 | return; | |
1188 | BN_clear_free(sig->r); | |
1189 | BN_clear_free(sig->s); | |
1190 | OPENSSL_free(sig); | |
1191 | } | |
7236e3c8 | 1192 | |
9267c11b | 1193 | void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps) |
7236e3c8 | 1194 | { |
91e7bcc2 | 1195 | if (pr != NULL) |
7236e3c8 | 1196 | *pr = sig->r; |
91e7bcc2 | 1197 | if (ps != NULL) |
7236e3c8 DSH |
1198 | *ps = sig->s; |
1199 | } | |
cf517a6d | 1200 | |
7ca3ea22 | 1201 | int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s) |
6a571a18 | 1202 | { |
bbaa9dd8 TS |
1203 | if (r == NULL || s == NULL) |
1204 | return 0; | |
6a571a18 TS |
1205 | BN_clear_free(sig->r); |
1206 | BN_clear_free(sig->s); | |
1207 | sig->r = r; | |
1208 | sig->s = s; | |
1209 | return 1; | |
1210 | } | |
1211 | ||
cf517a6d DSH |
1212 | int ECDSA_size(const EC_KEY *r) |
1213 | { | |
1214 | int ret, i; | |
1215 | ASN1_INTEGER bs; | |
cf517a6d DSH |
1216 | unsigned char buf[4]; |
1217 | const EC_GROUP *group; | |
1218 | ||
1219 | if (r == NULL) | |
1220 | return 0; | |
1221 | group = EC_KEY_get0_group(r); | |
1222 | if (group == NULL) | |
1223 | return 0; | |
1224 | ||
be2e334f DSH |
1225 | i = EC_GROUP_order_bits(group); |
1226 | if (i == 0) | |
cf517a6d | 1227 | return 0; |
cf517a6d DSH |
1228 | bs.length = (i + 7) / 8; |
1229 | bs.data = buf; | |
1230 | bs.type = V_ASN1_INTEGER; | |
1231 | /* If the top bit is set the asn1 encoding is 1 larger. */ | |
1232 | buf[0] = 0xff; | |
1233 | ||
1234 | i = i2d_ASN1_INTEGER(&bs, NULL); | |
1235 | i += i; /* r and s */ | |
1236 | ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE); | |
26a7d938 | 1237 | return ret; |
cf517a6d | 1238 | } |