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Commit | Line | Data |
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7e31164a | 1 | /* |
8020d79b | 2 | * Copyright 2002-2021 The OpenSSL Project Authors. All Rights Reserved. |
012c86ab | 3 | * |
a7f182b7 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
aa6bb135 RS |
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 | ||
579422c8 P |
10 | /* |
11 | * ECDSA low level APIs are deprecated for public use, but still ok for | |
12 | * internal use. | |
13 | */ | |
14 | #include "internal/deprecated.h" | |
15 | ||
5454829a | 16 | #include <string.h> |
706457b7 | 17 | #include "ec_local.h" |
0bee0e62 | 18 | #include <openssl/err.h> |
012c86ab BM |
19 | #include <openssl/asn1t.h> |
20 | #include <openssl/objects.h> | |
677963e5 | 21 | #include "internal/nelem.h" |
7c310e87 | 22 | #include "crypto/asn1.h" |
25f2138b | 23 | #include "crypto/asn1_dsa.h" |
012c86ab | 24 | |
f844f9eb | 25 | #ifndef FIPS_MODULE |
a9612d6c | 26 | |
012c86ab | 27 | /* some structures needed for the asn1 encoding */ |
012c86ab | 28 | typedef struct x9_62_pentanomial_st { |
6a32a3c0 RL |
29 | int32_t k1; |
30 | int32_t k2; | |
31 | int32_t k3; | |
0f113f3e | 32 | } X9_62_PENTANOMIAL; |
012c86ab | 33 | |
37af03d3 | 34 | typedef struct x9_62_characteristic_two_st { |
6a32a3c0 | 35 | int32_t m; |
0f113f3e MC |
36 | ASN1_OBJECT *type; |
37 | union { | |
38 | char *ptr; | |
39 | /* NID_X9_62_onBasis */ | |
40 | ASN1_NULL *onBasis; | |
41 | /* NID_X9_62_tpBasis */ | |
42 | ASN1_INTEGER *tpBasis; | |
43 | /* NID_X9_62_ppBasis */ | |
44 | X9_62_PENTANOMIAL *ppBasis; | |
45 | /* anything else */ | |
46 | ASN1_TYPE *other; | |
47 | } p; | |
48 | } X9_62_CHARACTERISTIC_TWO; | |
37af03d3 GT |
49 | |
50 | typedef struct x9_62_fieldid_st { | |
0f113f3e MC |
51 | ASN1_OBJECT *fieldType; |
52 | union { | |
53 | char *ptr; | |
54 | /* NID_X9_62_prime_field */ | |
55 | ASN1_INTEGER *prime; | |
56 | /* NID_X9_62_characteristic_two_field */ | |
57 | X9_62_CHARACTERISTIC_TWO *char_two; | |
58 | /* anything else */ | |
59 | ASN1_TYPE *other; | |
60 | } p; | |
61 | } X9_62_FIELDID; | |
37af03d3 | 62 | |
012c86ab | 63 | typedef struct x9_62_curve_st { |
0f113f3e MC |
64 | ASN1_OCTET_STRING *a; |
65 | ASN1_OCTET_STRING *b; | |
66 | ASN1_BIT_STRING *seed; | |
67 | } X9_62_CURVE; | |
012c86ab | 68 | |
03f880e4 | 69 | struct ec_parameters_st { |
6a32a3c0 | 70 | int32_t version; |
0f113f3e MC |
71 | X9_62_FIELDID *fieldID; |
72 | X9_62_CURVE *curve; | |
73 | ASN1_OCTET_STRING *base; | |
74 | ASN1_INTEGER *order; | |
75 | ASN1_INTEGER *cofactor; | |
03f880e4 | 76 | } /* ECPARAMETERS */ ; |
012c86ab | 77 | |
fe2f8aec TM |
78 | typedef enum { |
79 | ECPKPARAMETERS_TYPE_NAMED = 0, | |
80 | ECPKPARAMETERS_TYPE_EXPLICIT, | |
81 | ECPKPARAMETERS_TYPE_IMPLICIT | |
82 | } ecpk_parameters_type_t; | |
83 | ||
012c86ab | 84 | struct ecpk_parameters_st { |
0f113f3e MC |
85 | int type; |
86 | union { | |
87 | ASN1_OBJECT *named_curve; | |
88 | ECPARAMETERS *parameters; | |
89 | ASN1_NULL *implicitlyCA; | |
90 | } value; | |
91 | } /* ECPKPARAMETERS */ ; | |
012c86ab | 92 | |
14a7cfb3 BM |
93 | /* SEC1 ECPrivateKey */ |
94 | typedef struct ec_privatekey_st { | |
6a32a3c0 | 95 | int32_t version; |
0f113f3e MC |
96 | ASN1_OCTET_STRING *privateKey; |
97 | ECPKPARAMETERS *parameters; | |
98 | ASN1_BIT_STRING *publicKey; | |
99 | } EC_PRIVATEKEY; | |
14a7cfb3 | 100 | |
37af03d3 GT |
101 | /* the OpenSSL ASN.1 definitions */ |
102 | ASN1_SEQUENCE(X9_62_PENTANOMIAL) = { | |
9612e157 RL |
103 | ASN1_EMBED(X9_62_PENTANOMIAL, k1, INT32), |
104 | ASN1_EMBED(X9_62_PENTANOMIAL, k2, INT32), | |
105 | ASN1_EMBED(X9_62_PENTANOMIAL, k3, INT32) | |
df2ee0e2 | 106 | } static_ASN1_SEQUENCE_END(X9_62_PENTANOMIAL) |
012c86ab | 107 | |
37af03d3 GT |
108 | DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL) |
109 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL) | |
110 | ||
111 | ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY); | |
012c86ab | 112 | |
37af03d3 | 113 | ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = { |
0f113f3e MC |
114 | ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)), |
115 | ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)), | |
116 | ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL)) | |
37af03d3 | 117 | } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL); |
012c86ab BM |
118 | |
119 | ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = { | |
9612e157 | 120 | ASN1_EMBED(X9_62_CHARACTERISTIC_TWO, m, INT32), |
0f113f3e MC |
121 | ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT), |
122 | ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO) | |
df2ee0e2 | 123 | } static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO) |
012c86ab | 124 | |
37af03d3 GT |
125 | DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO) |
126 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO) | |
012c86ab | 127 | |
37af03d3 GT |
128 | ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY); |
129 | ||
130 | ASN1_ADB(X9_62_FIELDID) = { | |
0f113f3e MC |
131 | ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)), |
132 | ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO)) | |
37af03d3 | 133 | } ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL); |
012c86ab | 134 | |
37af03d3 | 135 | ASN1_SEQUENCE(X9_62_FIELDID) = { |
0f113f3e MC |
136 | ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT), |
137 | ASN1_ADB_OBJECT(X9_62_FIELDID) | |
df2ee0e2 | 138 | } static_ASN1_SEQUENCE_END(X9_62_FIELDID) |
012c86ab BM |
139 | |
140 | ASN1_SEQUENCE(X9_62_CURVE) = { | |
0f113f3e MC |
141 | ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING), |
142 | ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING), | |
143 | ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING) | |
df2ee0e2 | 144 | } static_ASN1_SEQUENCE_END(X9_62_CURVE) |
012c86ab | 145 | |
012c86ab | 146 | ASN1_SEQUENCE(ECPARAMETERS) = { |
9612e157 | 147 | ASN1_EMBED(ECPARAMETERS, version, INT32), |
0f113f3e MC |
148 | ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID), |
149 | ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE), | |
150 | ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING), | |
151 | ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER), | |
152 | ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER) | |
60b350a3 | 153 | } ASN1_SEQUENCE_END(ECPARAMETERS) |
012c86ab | 154 | |
37af03d3 GT |
155 | DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) |
156 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) | |
012c86ab BM |
157 | |
158 | ASN1_CHOICE(ECPKPARAMETERS) = { | |
0f113f3e MC |
159 | ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT), |
160 | ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS), | |
161 | ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL) | |
60b350a3 | 162 | } ASN1_CHOICE_END(ECPKPARAMETERS) |
012c86ab | 163 | |
9fdcc21f DO |
164 | DECLARE_ASN1_FUNCTIONS(ECPKPARAMETERS) |
165 | DECLARE_ASN1_ENCODE_FUNCTIONS_name(ECPKPARAMETERS, ECPKPARAMETERS) | |
166 | IMPLEMENT_ASN1_FUNCTIONS(ECPKPARAMETERS) | |
012c86ab | 167 | |
0bee0e62 | 168 | ASN1_SEQUENCE(EC_PRIVATEKEY) = { |
9612e157 | 169 | ASN1_EMBED(EC_PRIVATEKEY, version, INT32), |
0f113f3e MC |
170 | ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING), |
171 | ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0), | |
172 | ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1) | |
df2ee0e2 | 173 | } static_ASN1_SEQUENCE_END(EC_PRIVATEKEY) |
0bee0e62 | 174 | |
9fdcc21f DO |
175 | DECLARE_ASN1_FUNCTIONS(EC_PRIVATEKEY) |
176 | DECLARE_ASN1_ENCODE_FUNCTIONS_name(EC_PRIVATEKEY, EC_PRIVATEKEY) | |
177 | IMPLEMENT_ASN1_FUNCTIONS(EC_PRIVATEKEY) | |
0bee0e62 | 178 | |
7e31164a | 179 | /* some declarations of internal function */ |
012c86ab | 180 | |
0f113f3e | 181 | /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */ |
37af03d3 | 182 | static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *); |
0f113f3e | 183 | /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */ |
37af03d3 | 184 | static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *); |
7e31164a BM |
185 | |
186 | /* the function definitions */ | |
012c86ab | 187 | |
37af03d3 | 188 | static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field) |
0f113f3e MC |
189 | { |
190 | int ok = 0, nid; | |
191 | BIGNUM *tmp = NULL; | |
192 | ||
193 | if (group == NULL || field == NULL) | |
194 | return 0; | |
195 | ||
196 | /* clear the old values (if necessary) */ | |
0dfb9398 | 197 | ASN1_OBJECT_free(field->fieldType); |
2ace7450 | 198 | ASN1_TYPE_free(field->p.other); |
0f113f3e | 199 | |
23ccae80 | 200 | nid = EC_GROUP_get_field_type(group); |
0f113f3e MC |
201 | /* set OID for the field */ |
202 | if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) { | |
9311d0c4 | 203 | ERR_raise(ERR_LIB_EC, ERR_R_OBJ_LIB); |
0f113f3e MC |
204 | goto err; |
205 | } | |
206 | ||
207 | if (nid == NID_X9_62_prime_field) { | |
208 | if ((tmp = BN_new()) == NULL) { | |
e077455e | 209 | ERR_raise(ERR_LIB_EC, ERR_R_BN_LIB); |
0f113f3e MC |
210 | goto err; |
211 | } | |
212 | /* the parameters are specified by the prime number p */ | |
9cc570d4 | 213 | if (!EC_GROUP_get_curve(group, tmp, NULL, NULL, NULL)) { |
9311d0c4 | 214 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
215 | goto err; |
216 | } | |
217 | /* set the prime number */ | |
218 | field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL); | |
219 | if (field->p.prime == NULL) { | |
9311d0c4 | 220 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
221 | goto err; |
222 | } | |
6903e2e7 | 223 | } else if (nid == NID_X9_62_characteristic_two_field) |
b3310161 | 224 | #ifdef OPENSSL_NO_EC2M |
0f113f3e | 225 | { |
9311d0c4 | 226 | ERR_raise(ERR_LIB_EC, EC_R_GF2M_NOT_SUPPORTED); |
0f113f3e MC |
227 | goto err; |
228 | } | |
b3310161 | 229 | #else |
0f113f3e MC |
230 | { |
231 | int field_type; | |
232 | X9_62_CHARACTERISTIC_TWO *char_two; | |
233 | ||
234 | field->p.char_two = X9_62_CHARACTERISTIC_TWO_new(); | |
235 | char_two = field->p.char_two; | |
236 | ||
237 | if (char_two == NULL) { | |
e077455e | 238 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
239 | goto err; |
240 | } | |
241 | ||
242 | char_two->m = (long)EC_GROUP_get_degree(group); | |
243 | ||
244 | field_type = EC_GROUP_get_basis_type(group); | |
245 | ||
246 | if (field_type == 0) { | |
9311d0c4 | 247 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
248 | goto err; |
249 | } | |
250 | /* set base type OID */ | |
251 | if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) { | |
9311d0c4 | 252 | ERR_raise(ERR_LIB_EC, ERR_R_OBJ_LIB); |
0f113f3e MC |
253 | goto err; |
254 | } | |
255 | ||
256 | if (field_type == NID_X9_62_tpBasis) { | |
257 | unsigned int k; | |
258 | ||
259 | if (!EC_GROUP_get_trinomial_basis(group, &k)) | |
260 | goto err; | |
261 | ||
262 | char_two->p.tpBasis = ASN1_INTEGER_new(); | |
90945fa3 | 263 | if (char_two->p.tpBasis == NULL) { |
e077455e | 264 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
265 | goto err; |
266 | } | |
267 | if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) { | |
9311d0c4 | 268 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
269 | goto err; |
270 | } | |
271 | } else if (field_type == NID_X9_62_ppBasis) { | |
272 | unsigned int k1, k2, k3; | |
273 | ||
274 | if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3)) | |
275 | goto err; | |
276 | ||
277 | char_two->p.ppBasis = X9_62_PENTANOMIAL_new(); | |
90945fa3 | 278 | if (char_two->p.ppBasis == NULL) { |
e077455e | 279 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
280 | goto err; |
281 | } | |
282 | ||
283 | /* set k? values */ | |
284 | char_two->p.ppBasis->k1 = (long)k1; | |
285 | char_two->p.ppBasis->k2 = (long)k2; | |
286 | char_two->p.ppBasis->k3 = (long)k3; | |
287 | } else { /* field_type == NID_X9_62_onBasis */ | |
288 | ||
289 | /* for ONB the parameters are (asn1) NULL */ | |
290 | char_two->p.onBasis = ASN1_NULL_new(); | |
90945fa3 | 291 | if (char_two->p.onBasis == NULL) { |
e077455e | 292 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
293 | goto err; |
294 | } | |
295 | } | |
296 | } | |
b3310161 | 297 | #endif |
6903e2e7 | 298 | else { |
9311d0c4 | 299 | ERR_raise(ERR_LIB_EC, EC_R_UNSUPPORTED_FIELD); |
6903e2e7 DSH |
300 | goto err; |
301 | } | |
012c86ab | 302 | |
0f113f3e | 303 | ok = 1; |
012c86ab | 304 | |
23a1d5e9 RS |
305 | err: |
306 | BN_free(tmp); | |
26a7d938 | 307 | return ok; |
012c86ab BM |
308 | } |
309 | ||
37af03d3 | 310 | static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve) |
0f113f3e | 311 | { |
9cc570d4 | 312 | int ok = 0; |
0f113f3e | 313 | BIGNUM *tmp_1 = NULL, *tmp_2 = NULL; |
fc6f579a DB |
314 | unsigned char *a_buf = NULL, *b_buf = NULL; |
315 | size_t len; | |
0f113f3e MC |
316 | |
317 | if (!group || !curve || !curve->a || !curve->b) | |
318 | return 0; | |
319 | ||
320 | if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) { | |
e077455e | 321 | ERR_raise(ERR_LIB_EC, ERR_R_BN_LIB); |
0f113f3e MC |
322 | goto err; |
323 | } | |
324 | ||
0f113f3e | 325 | /* get a and b */ |
9cc570d4 | 326 | if (!EC_GROUP_get_curve(group, NULL, tmp_1, tmp_2, NULL)) { |
9311d0c4 | 327 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
9cc570d4 | 328 | goto err; |
0f113f3e | 329 | } |
0f113f3e | 330 | |
fc6f579a DB |
331 | /* |
332 | * Per SEC 1, the curve coefficients must be padded up to size. See C.2's | |
333 | * definition of Curve, C.1's definition of FieldElement, and 2.3.5's | |
334 | * definition of how to encode the field elements. | |
335 | */ | |
336 | len = ((size_t)EC_GROUP_get_degree(group) + 7) / 8; | |
337 | if ((a_buf = OPENSSL_malloc(len)) == NULL | |
e077455e | 338 | || (b_buf = OPENSSL_malloc(len)) == NULL) |
fc6f579a | 339 | goto err; |
fc6f579a DB |
340 | if (BN_bn2binpad(tmp_1, a_buf, len) < 0 |
341 | || BN_bn2binpad(tmp_2, b_buf, len) < 0) { | |
9311d0c4 | 342 | ERR_raise(ERR_LIB_EC, ERR_R_BN_LIB); |
fc6f579a | 343 | goto err; |
0f113f3e MC |
344 | } |
345 | ||
346 | /* set a and b */ | |
fc6f579a DB |
347 | if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len) |
348 | || !ASN1_OCTET_STRING_set(curve->b, b_buf, len)) { | |
9311d0c4 | 349 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
350 | goto err; |
351 | } | |
352 | ||
353 | /* set the seed (optional) */ | |
354 | if (group->seed) { | |
355 | if (!curve->seed) | |
356 | if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) { | |
e077455e | 357 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
358 | goto err; |
359 | } | |
7c310e87 | 360 | ossl_asn1_string_set_bits_left(curve->seed, 0); |
0f113f3e MC |
361 | if (!ASN1_BIT_STRING_set(curve->seed, group->seed, |
362 | (int)group->seed_len)) { | |
9311d0c4 | 363 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
364 | goto err; |
365 | } | |
366 | } else { | |
2ace7450 RS |
367 | ASN1_BIT_STRING_free(curve->seed); |
368 | curve->seed = NULL; | |
0f113f3e MC |
369 | } |
370 | ||
371 | ok = 1; | |
372 | ||
23a1d5e9 | 373 | err: |
fc6f579a DB |
374 | OPENSSL_free(a_buf); |
375 | OPENSSL_free(b_buf); | |
23a1d5e9 RS |
376 | BN_free(tmp_1); |
377 | BN_free(tmp_2); | |
26a7d938 | 378 | return ok; |
0f113f3e | 379 | } |
012c86ab | 380 | |
60b350a3 | 381 | ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group, |
c0f39ded | 382 | ECPARAMETERS *params) |
0f113f3e | 383 | { |
0f113f3e MC |
384 | size_t len = 0; |
385 | ECPARAMETERS *ret = NULL; | |
be2e334f | 386 | const BIGNUM *tmp; |
0f113f3e MC |
387 | unsigned char *buffer = NULL; |
388 | const EC_POINT *point = NULL; | |
389 | point_conversion_form_t form; | |
f28bc7d3 | 390 | ASN1_INTEGER *orig; |
0f113f3e | 391 | |
60b350a3 | 392 | if (params == NULL) { |
0f113f3e | 393 | if ((ret = ECPARAMETERS_new()) == NULL) { |
e077455e | 394 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
395 | goto err; |
396 | } | |
397 | } else | |
60b350a3 | 398 | ret = params; |
0f113f3e MC |
399 | |
400 | /* set the version (always one) */ | |
401 | ret->version = (long)0x1; | |
402 | ||
403 | /* set the fieldID */ | |
404 | if (!ec_asn1_group2fieldid(group, ret->fieldID)) { | |
9311d0c4 | 405 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
406 | goto err; |
407 | } | |
408 | ||
409 | /* set the curve */ | |
410 | if (!ec_asn1_group2curve(group, ret->curve)) { | |
9311d0c4 | 411 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
412 | goto err; |
413 | } | |
414 | ||
415 | /* set the base point */ | |
416 | if ((point = EC_GROUP_get0_generator(group)) == NULL) { | |
9311d0c4 | 417 | ERR_raise(ERR_LIB_EC, EC_R_UNDEFINED_GENERATOR); |
0f113f3e MC |
418 | goto err; |
419 | } | |
420 | ||
421 | form = EC_GROUP_get_point_conversion_form(group); | |
422 | ||
981bd8a2 | 423 | len = EC_POINT_point2buf(group, point, form, &buffer, NULL); |
0f113f3e | 424 | if (len == 0) { |
9311d0c4 | 425 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
426 | goto err; |
427 | } | |
0f113f3e | 428 | if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) { |
0110a470 | 429 | OPENSSL_free(buffer); |
e077455e | 430 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
431 | goto err; |
432 | } | |
0110a470 | 433 | ASN1_STRING_set0(ret->base, buffer, len); |
0f113f3e MC |
434 | |
435 | /* set the order */ | |
be2e334f DSH |
436 | tmp = EC_GROUP_get0_order(group); |
437 | if (tmp == NULL) { | |
9311d0c4 | 438 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
439 | goto err; |
440 | } | |
f28bc7d3 | 441 | ret->order = BN_to_ASN1_INTEGER(tmp, orig = ret->order); |
0f113f3e | 442 | if (ret->order == NULL) { |
f28bc7d3 | 443 | ret->order = orig; |
9311d0c4 | 444 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
445 | goto err; |
446 | } | |
447 | ||
448 | /* set the cofactor (optional) */ | |
be2e334f DSH |
449 | tmp = EC_GROUP_get0_cofactor(group); |
450 | if (tmp != NULL) { | |
f28bc7d3 | 451 | ret->cofactor = BN_to_ASN1_INTEGER(tmp, orig = ret->cofactor); |
0f113f3e | 452 | if (ret->cofactor == NULL) { |
f28bc7d3 | 453 | ret->cofactor = orig; |
9311d0c4 | 454 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
455 | goto err; |
456 | } | |
457 | } | |
458 | ||
23a1d5e9 | 459 | return ret; |
0f113f3e | 460 | |
23a1d5e9 | 461 | err: |
60b350a3 | 462 | if (params == NULL) |
23a1d5e9 | 463 | ECPARAMETERS_free(ret); |
23a1d5e9 | 464 | return NULL; |
0f113f3e MC |
465 | } |
466 | ||
60b350a3 RS |
467 | ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group, |
468 | ECPKPARAMETERS *params) | |
0f113f3e MC |
469 | { |
470 | int ok = 1, tmp; | |
471 | ECPKPARAMETERS *ret = params; | |
472 | ||
473 | if (ret == NULL) { | |
474 | if ((ret = ECPKPARAMETERS_new()) == NULL) { | |
e077455e | 475 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
476 | return NULL; |
477 | } | |
478 | } else { | |
fe2f8aec | 479 | if (ret->type == ECPKPARAMETERS_TYPE_NAMED) |
0f113f3e | 480 | ASN1_OBJECT_free(ret->value.named_curve); |
fe2f8aec TM |
481 | else if (ret->type == ECPKPARAMETERS_TYPE_EXPLICIT |
482 | && ret->value.parameters != NULL) | |
0f113f3e MC |
483 | ECPARAMETERS_free(ret->value.parameters); |
484 | } | |
485 | ||
7aa3dfc4 | 486 | if (EC_GROUP_get_asn1_flag(group) == OPENSSL_EC_NAMED_CURVE) { |
0f113f3e | 487 | /* |
436ad81f | 488 | * use the asn1 OID to describe the elliptic curve parameters |
0f113f3e MC |
489 | */ |
490 | tmp = EC_GROUP_get_curve_name(group); | |
491 | if (tmp) { | |
e0137ca9 NT |
492 | ASN1_OBJECT *asn1obj = OBJ_nid2obj(tmp); |
493 | ||
494 | if (asn1obj == NULL || OBJ_length(asn1obj) == 0) { | |
495 | ASN1_OBJECT_free(asn1obj); | |
9311d0c4 | 496 | ERR_raise(ERR_LIB_EC, EC_R_MISSING_OID); |
0f113f3e | 497 | ok = 0; |
e0137ca9 | 498 | } else { |
fe2f8aec | 499 | ret->type = ECPKPARAMETERS_TYPE_NAMED; |
e0137ca9 NT |
500 | ret->value.named_curve = asn1obj; |
501 | } | |
0f113f3e | 502 | } else |
0d4fb843 | 503 | /* we don't know the nid => ERROR */ |
0f113f3e MC |
504 | ok = 0; |
505 | } else { | |
506 | /* use the ECPARAMETERS structure */ | |
fe2f8aec | 507 | ret->type = ECPKPARAMETERS_TYPE_EXPLICIT; |
0f113f3e | 508 | if ((ret->value.parameters = |
60b350a3 | 509 | EC_GROUP_get_ecparameters(group, NULL)) == NULL) |
0f113f3e MC |
510 | ok = 0; |
511 | } | |
512 | ||
513 | if (!ok) { | |
514 | ECPKPARAMETERS_free(ret); | |
515 | return NULL; | |
516 | } | |
517 | return ret; | |
518 | } | |
012c86ab | 519 | |
60b350a3 | 520 | EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params) |
0f113f3e MC |
521 | { |
522 | int ok = 0, tmp; | |
bacaa618 | 523 | EC_GROUP *ret = NULL, *dup = NULL; |
0f113f3e MC |
524 | BIGNUM *p = NULL, *a = NULL, *b = NULL; |
525 | EC_POINT *point = NULL; | |
526 | long field_bits; | |
bacaa618 NT |
527 | int curve_name = NID_undef; |
528 | BN_CTX *ctx = NULL; | |
0f113f3e | 529 | |
12a765a5 RS |
530 | if (params->fieldID == NULL |
531 | || params->fieldID->fieldType == NULL | |
532 | || params->fieldID->p.ptr == NULL) { | |
9311d0c4 | 533 | ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); |
0f113f3e MC |
534 | goto err; |
535 | } | |
536 | ||
fc6f579a DB |
537 | /* |
538 | * Now extract the curve parameters a and b. Note that, although SEC 1 | |
539 | * specifies the length of their encodings, historical versions of OpenSSL | |
540 | * encoded them incorrectly, so we must accept any length for backwards | |
541 | * compatibility. | |
542 | */ | |
12a765a5 RS |
543 | if (params->curve == NULL |
544 | || params->curve->a == NULL || params->curve->a->data == NULL | |
545 | || params->curve->b == NULL || params->curve->b->data == NULL) { | |
9311d0c4 | 546 | ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); |
0f113f3e MC |
547 | goto err; |
548 | } | |
549 | a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL); | |
550 | if (a == NULL) { | |
9311d0c4 | 551 | ERR_raise(ERR_LIB_EC, ERR_R_BN_LIB); |
0f113f3e MC |
552 | goto err; |
553 | } | |
554 | b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL); | |
555 | if (b == NULL) { | |
9311d0c4 | 556 | ERR_raise(ERR_LIB_EC, ERR_R_BN_LIB); |
0f113f3e MC |
557 | goto err; |
558 | } | |
559 | ||
560 | /* get the field parameters */ | |
561 | tmp = OBJ_obj2nid(params->fieldID->fieldType); | |
562 | if (tmp == NID_X9_62_characteristic_two_field) | |
b3310161 | 563 | #ifdef OPENSSL_NO_EC2M |
0f113f3e | 564 | { |
9311d0c4 | 565 | ERR_raise(ERR_LIB_EC, EC_R_GF2M_NOT_SUPPORTED); |
0f113f3e MC |
566 | goto err; |
567 | } | |
b3310161 | 568 | #else |
0f113f3e MC |
569 | { |
570 | X9_62_CHARACTERISTIC_TWO *char_two; | |
571 | ||
572 | char_two = params->fieldID->p.char_two; | |
573 | ||
574 | field_bits = char_two->m; | |
575 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
9311d0c4 | 576 | ERR_raise(ERR_LIB_EC, EC_R_FIELD_TOO_LARGE); |
0f113f3e MC |
577 | goto err; |
578 | } | |
579 | ||
580 | if ((p = BN_new()) == NULL) { | |
e077455e | 581 | ERR_raise(ERR_LIB_EC, ERR_R_BN_LIB); |
0f113f3e MC |
582 | goto err; |
583 | } | |
584 | ||
585 | /* get the base type */ | |
586 | tmp = OBJ_obj2nid(char_two->type); | |
587 | ||
588 | if (tmp == NID_X9_62_tpBasis) { | |
589 | long tmp_long; | |
590 | ||
591 | if (!char_two->p.tpBasis) { | |
9311d0c4 | 592 | ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); |
0f113f3e MC |
593 | goto err; |
594 | } | |
595 | ||
596 | tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis); | |
597 | ||
598 | if (!(char_two->m > tmp_long && tmp_long > 0)) { | |
9311d0c4 | 599 | ERR_raise(ERR_LIB_EC, EC_R_INVALID_TRINOMIAL_BASIS); |
0f113f3e MC |
600 | goto err; |
601 | } | |
602 | ||
603 | /* create the polynomial */ | |
604 | if (!BN_set_bit(p, (int)char_two->m)) | |
605 | goto err; | |
606 | if (!BN_set_bit(p, (int)tmp_long)) | |
607 | goto err; | |
608 | if (!BN_set_bit(p, 0)) | |
609 | goto err; | |
610 | } else if (tmp == NID_X9_62_ppBasis) { | |
611 | X9_62_PENTANOMIAL *penta; | |
612 | ||
613 | penta = char_two->p.ppBasis; | |
12a765a5 | 614 | if (penta == NULL) { |
9311d0c4 | 615 | ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); |
0f113f3e MC |
616 | goto err; |
617 | } | |
618 | ||
619 | if (! | |
620 | (char_two->m > penta->k3 && penta->k3 > penta->k2 | |
621 | && penta->k2 > penta->k1 && penta->k1 > 0)) { | |
9311d0c4 | 622 | ERR_raise(ERR_LIB_EC, EC_R_INVALID_PENTANOMIAL_BASIS); |
0f113f3e MC |
623 | goto err; |
624 | } | |
625 | ||
626 | /* create the polynomial */ | |
627 | if (!BN_set_bit(p, (int)char_two->m)) | |
628 | goto err; | |
629 | if (!BN_set_bit(p, (int)penta->k1)) | |
630 | goto err; | |
631 | if (!BN_set_bit(p, (int)penta->k2)) | |
632 | goto err; | |
633 | if (!BN_set_bit(p, (int)penta->k3)) | |
634 | goto err; | |
635 | if (!BN_set_bit(p, 0)) | |
636 | goto err; | |
637 | } else if (tmp == NID_X9_62_onBasis) { | |
9311d0c4 | 638 | ERR_raise(ERR_LIB_EC, EC_R_NOT_IMPLEMENTED); |
0f113f3e MC |
639 | goto err; |
640 | } else { /* error */ | |
641 | ||
9311d0c4 | 642 | ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); |
0f113f3e MC |
643 | goto err; |
644 | } | |
645 | ||
646 | /* create the EC_GROUP structure */ | |
647 | ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL); | |
648 | } | |
b3310161 | 649 | #endif |
0f113f3e MC |
650 | else if (tmp == NID_X9_62_prime_field) { |
651 | /* we have a curve over a prime field */ | |
652 | /* extract the prime number */ | |
12a765a5 | 653 | if (params->fieldID->p.prime == NULL) { |
9311d0c4 | 654 | ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); |
0f113f3e MC |
655 | goto err; |
656 | } | |
657 | p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL); | |
658 | if (p == NULL) { | |
9311d0c4 | 659 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
660 | goto err; |
661 | } | |
662 | ||
663 | if (BN_is_negative(p) || BN_is_zero(p)) { | |
9311d0c4 | 664 | ERR_raise(ERR_LIB_EC, EC_R_INVALID_FIELD); |
0f113f3e MC |
665 | goto err; |
666 | } | |
667 | ||
668 | field_bits = BN_num_bits(p); | |
669 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
9311d0c4 | 670 | ERR_raise(ERR_LIB_EC, EC_R_FIELD_TOO_LARGE); |
0f113f3e MC |
671 | goto err; |
672 | } | |
673 | ||
674 | /* create the EC_GROUP structure */ | |
675 | ret = EC_GROUP_new_curve_GFp(p, a, b, NULL); | |
676 | } else { | |
9311d0c4 | 677 | ERR_raise(ERR_LIB_EC, EC_R_INVALID_FIELD); |
0f113f3e MC |
678 | goto err; |
679 | } | |
680 | ||
681 | if (ret == NULL) { | |
9311d0c4 | 682 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
683 | goto err; |
684 | } | |
685 | ||
686 | /* extract seed (optional) */ | |
687 | if (params->curve->seed != NULL) { | |
97de6145 BE |
688 | /* |
689 | * This happens for instance with | |
690 | * fuzz/corpora/asn1/65cf44e85614c62f10cf3b7a7184c26293a19e4a | |
691 | * and causes the OPENSSL_malloc below to choke on the | |
692 | * zero length allocation request. | |
693 | */ | |
694 | if (params->curve->seed->length == 0) { | |
695 | ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); | |
696 | goto err; | |
697 | } | |
b548a1f1 | 698 | OPENSSL_free(ret->seed); |
e077455e | 699 | if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL) |
0f113f3e | 700 | goto err; |
0f113f3e MC |
701 | memcpy(ret->seed, params->curve->seed->data, |
702 | params->curve->seed->length); | |
703 | ret->seed_len = params->curve->seed->length; | |
704 | } | |
705 | ||
12a765a5 RS |
706 | if (params->order == NULL |
707 | || params->base == NULL | |
030c5aba MC |
708 | || params->base->data == NULL |
709 | || params->base->length == 0) { | |
9311d0c4 | 710 | ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); |
0f113f3e MC |
711 | goto err; |
712 | } | |
713 | ||
714 | if ((point = EC_POINT_new(ret)) == NULL) | |
715 | goto err; | |
716 | ||
717 | /* set the point conversion form */ | |
718 | EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t) | |
719 | (params->base->data[0] & ~0x01)); | |
720 | ||
721 | /* extract the ec point */ | |
722 | if (!EC_POINT_oct2point(ret, point, params->base->data, | |
723 | params->base->length, NULL)) { | |
9311d0c4 | 724 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
725 | goto err; |
726 | } | |
727 | ||
728 | /* extract the order */ | |
be50862e | 729 | if (ASN1_INTEGER_to_BN(params->order, a) == NULL) { |
9311d0c4 | 730 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
731 | goto err; |
732 | } | |
733 | if (BN_is_negative(a) || BN_is_zero(a)) { | |
9311d0c4 | 734 | ERR_raise(ERR_LIB_EC, EC_R_INVALID_GROUP_ORDER); |
0f113f3e MC |
735 | goto err; |
736 | } | |
737 | if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */ | |
9311d0c4 | 738 | ERR_raise(ERR_LIB_EC, EC_R_INVALID_GROUP_ORDER); |
0f113f3e MC |
739 | goto err; |
740 | } | |
741 | ||
742 | /* extract the cofactor (optional) */ | |
743 | if (params->cofactor == NULL) { | |
23a1d5e9 RS |
744 | BN_free(b); |
745 | b = NULL; | |
be50862e | 746 | } else if (ASN1_INTEGER_to_BN(params->cofactor, b) == NULL) { |
9311d0c4 | 747 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
748 | goto err; |
749 | } | |
750 | /* set the generator, order and cofactor (if present) */ | |
751 | if (!EC_GROUP_set_generator(ret, point, a, b)) { | |
9311d0c4 | 752 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
753 | goto err; |
754 | } | |
755 | ||
bacaa618 NT |
756 | /* |
757 | * Check if the explicit parameters group just created matches one of the | |
758 | * built-in curves. | |
759 | * | |
760 | * We create a copy of the group just built, so that we can remove optional | |
761 | * fields for the lookup: we do this to avoid the possibility that one of | |
762 | * the optional parameters is used to force the library into using a less | |
763 | * performant and less secure EC_METHOD instead of the specialized one. | |
764 | * In any case, `seed` is not really used in any computation, while a | |
765 | * cofactor different from the one in the built-in table is just | |
766 | * mathematically wrong anyway and should not be used. | |
767 | */ | |
768 | if ((ctx = BN_CTX_new()) == NULL) { | |
9311d0c4 | 769 | ERR_raise(ERR_LIB_EC, ERR_R_BN_LIB); |
bacaa618 NT |
770 | goto err; |
771 | } | |
772 | if ((dup = EC_GROUP_dup(ret)) == NULL | |
773 | || EC_GROUP_set_seed(dup, NULL, 0) != 1 | |
774 | || !EC_GROUP_set_generator(dup, point, a, NULL)) { | |
9311d0c4 | 775 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
bacaa618 NT |
776 | goto err; |
777 | } | |
32ab57cb | 778 | if ((curve_name = ossl_ec_curve_nid_from_params(dup, ctx)) != NID_undef) { |
bacaa618 NT |
779 | /* |
780 | * The input explicit parameters successfully matched one of the | |
781 | * built-in curves: often for built-in curves we have specialized | |
782 | * methods with better performance and hardening. | |
783 | * | |
784 | * In this case we replace the `EC_GROUP` created through explicit | |
785 | * parameters with one created from a named group. | |
786 | */ | |
787 | EC_GROUP *named_group = NULL; | |
788 | ||
789 | #ifndef OPENSSL_NO_EC_NISTP_64_GCC_128 | |
790 | /* | |
791 | * NID_wap_wsg_idm_ecid_wtls12 and NID_secp224r1 are both aliases for | |
792 | * the same curve, we prefer the SECP nid when matching explicit | |
793 | * parameters as that is associated with a specialized EC_METHOD. | |
794 | */ | |
795 | if (curve_name == NID_wap_wsg_idm_ecid_wtls12) | |
796 | curve_name = NID_secp224r1; | |
797 | #endif /* !def(OPENSSL_NO_EC_NISTP_64_GCC_128) */ | |
798 | ||
799 | if ((named_group = EC_GROUP_new_by_curve_name(curve_name)) == NULL) { | |
9311d0c4 | 800 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
bacaa618 NT |
801 | goto err; |
802 | } | |
803 | EC_GROUP_free(ret); | |
804 | ret = named_group; | |
805 | ||
806 | /* | |
807 | * Set the flag so that EC_GROUPs created from explicit parameters are | |
808 | * serialized using explicit parameters by default. | |
809 | */ | |
810 | EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_EXPLICIT_CURVE); | |
f97a8af2 NT |
811 | |
812 | /* | |
813 | * If the input params do not contain the optional seed field we make | |
814 | * sure it is not added to the returned group. | |
815 | * | |
816 | * The seed field is not really used inside libcrypto anyway, and | |
817 | * adding it to parsed explicit parameter keys would alter their DER | |
818 | * encoding output (because of the extra field) which could impact | |
819 | * applications fingerprinting keys by their DER encoding. | |
820 | */ | |
821 | if (params->curve->seed == NULL) { | |
822 | if (EC_GROUP_set_seed(ret, NULL, 0) != 1) | |
823 | goto err; | |
824 | } | |
bacaa618 NT |
825 | } |
826 | ||
0f113f3e MC |
827 | ok = 1; |
828 | ||
8fdc3734 RS |
829 | err: |
830 | if (!ok) { | |
bacaa618 | 831 | EC_GROUP_free(ret); |
0f113f3e MC |
832 | ret = NULL; |
833 | } | |
bacaa618 | 834 | EC_GROUP_free(dup); |
0f113f3e | 835 | |
23a1d5e9 RS |
836 | BN_free(p); |
837 | BN_free(a); | |
838 | BN_free(b); | |
8fdc3734 | 839 | EC_POINT_free(point); |
bacaa618 NT |
840 | |
841 | BN_CTX_free(ctx); | |
842 | ||
26a7d938 | 843 | return ret; |
012c86ab BM |
844 | } |
845 | ||
60b350a3 | 846 | EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params) |
0f113f3e MC |
847 | { |
848 | EC_GROUP *ret = NULL; | |
849 | int tmp = 0; | |
850 | ||
851 | if (params == NULL) { | |
9311d0c4 | 852 | ERR_raise(ERR_LIB_EC, EC_R_MISSING_PARAMETERS); |
0f113f3e MC |
853 | return NULL; |
854 | } | |
855 | ||
fe2f8aec TM |
856 | if (params->type == ECPKPARAMETERS_TYPE_NAMED) { |
857 | /* the curve is given by an OID */ | |
0f113f3e MC |
858 | tmp = OBJ_obj2nid(params->value.named_curve); |
859 | if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) { | |
9311d0c4 | 860 | ERR_raise(ERR_LIB_EC, EC_R_EC_GROUP_NEW_BY_NAME_FAILURE); |
0f113f3e MC |
861 | return NULL; |
862 | } | |
863 | EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE); | |
fe2f8aec TM |
864 | } else if (params->type == ECPKPARAMETERS_TYPE_EXPLICIT) { |
865 | /* the parameters are given by an ECPARAMETERS structure */ | |
60b350a3 | 866 | ret = EC_GROUP_new_from_ecparameters(params->value.parameters); |
0f113f3e | 867 | if (!ret) { |
9311d0c4 | 868 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
869 | return NULL; |
870 | } | |
e363534c | 871 | EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_EXPLICIT_CURVE); |
fe2f8aec TM |
872 | } else if (params->type == ECPKPARAMETERS_TYPE_IMPLICIT) { |
873 | /* implicit parameters inherited from CA - unsupported */ | |
0f113f3e MC |
874 | return NULL; |
875 | } else { | |
9311d0c4 | 876 | ERR_raise(ERR_LIB_EC, EC_R_ASN1_ERROR); |
0f113f3e MC |
877 | return NULL; |
878 | } | |
879 | ||
880 | return ret; | |
881 | } | |
012c86ab | 882 | |
14a7cfb3 | 883 | /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */ |
012c86ab | 884 | |
6343829a | 885 | EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len) |
0f113f3e MC |
886 | { |
887 | EC_GROUP *group = NULL; | |
888 | ECPKPARAMETERS *params = NULL; | |
a46c9789 | 889 | const unsigned char *p = *in; |
0f113f3e | 890 | |
a46c9789 | 891 | if ((params = d2i_ECPKPARAMETERS(NULL, &p, len)) == NULL) { |
0f113f3e MC |
892 | ECPKPARAMETERS_free(params); |
893 | return NULL; | |
894 | } | |
895 | ||
60b350a3 | 896 | if ((group = EC_GROUP_new_from_ecpkparameters(params)) == NULL) { |
0f113f3e MC |
897 | ECPKPARAMETERS_free(params); |
898 | return NULL; | |
899 | } | |
900 | ||
fe2f8aec TM |
901 | if (params->type == ECPKPARAMETERS_TYPE_EXPLICIT) |
902 | group->decoded_from_explicit_params = 1; | |
903 | ||
8fdc3734 | 904 | if (a) { |
bacaa618 | 905 | EC_GROUP_free(*a); |
0f113f3e | 906 | *a = group; |
8fdc3734 | 907 | } |
0f113f3e MC |
908 | |
909 | ECPKPARAMETERS_free(params); | |
a46c9789 | 910 | *in = p; |
26a7d938 | 911 | return group; |
0f113f3e | 912 | } |
012c86ab | 913 | |
14a7cfb3 | 914 | int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out) |
0f113f3e MC |
915 | { |
916 | int ret = 0; | |
60b350a3 | 917 | ECPKPARAMETERS *tmp = EC_GROUP_get_ecpkparameters(a, NULL); |
0f113f3e | 918 | if (tmp == NULL) { |
9311d0c4 | 919 | ERR_raise(ERR_LIB_EC, EC_R_GROUP2PKPARAMETERS_FAILURE); |
0f113f3e MC |
920 | return 0; |
921 | } | |
922 | if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) { | |
9311d0c4 | 923 | ERR_raise(ERR_LIB_EC, EC_R_I2D_ECPKPARAMETERS_FAILURE); |
0f113f3e MC |
924 | ECPKPARAMETERS_free(tmp); |
925 | return 0; | |
926 | } | |
927 | ECPKPARAMETERS_free(tmp); | |
26a7d938 | 928 | return ret; |
0f113f3e | 929 | } |
012c86ab | 930 | |
14a7cfb3 BM |
931 | /* some EC_KEY functions */ |
932 | ||
6343829a | 933 | EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len) |
0f113f3e | 934 | { |
0f113f3e MC |
935 | EC_KEY *ret = NULL; |
936 | EC_PRIVATEKEY *priv_key = NULL; | |
a46c9789 | 937 | const unsigned char *p = *in; |
0f113f3e | 938 | |
29844ea5 | 939 | if ((priv_key = d2i_EC_PRIVATEKEY(NULL, &p, len)) == NULL) |
0f113f3e | 940 | return NULL; |
0f113f3e MC |
941 | |
942 | if (a == NULL || *a == NULL) { | |
943 | if ((ret = EC_KEY_new()) == NULL) { | |
e077455e | 944 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
945 | goto err; |
946 | } | |
0f113f3e MC |
947 | } else |
948 | ret = *a; | |
949 | ||
950 | if (priv_key->parameters) { | |
bacaa618 | 951 | EC_GROUP_free(ret->group); |
60b350a3 | 952 | ret->group = EC_GROUP_new_from_ecpkparameters(priv_key->parameters); |
fe2f8aec TM |
953 | if (ret->group != NULL |
954 | && priv_key->parameters->type == ECPKPARAMETERS_TYPE_EXPLICIT) | |
955 | ret->group->decoded_from_explicit_params = 1; | |
0f113f3e MC |
956 | } |
957 | ||
958 | if (ret->group == NULL) { | |
9311d0c4 | 959 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
960 | goto err; |
961 | } | |
962 | ||
963 | ret->version = priv_key->version; | |
964 | ||
965 | if (priv_key->privateKey) { | |
d810700b | 966 | ASN1_OCTET_STRING *pkey = priv_key->privateKey; |
17ebf85a | 967 | if (EC_KEY_oct2priv(ret, ASN1_STRING_get0_data(pkey), |
d810700b | 968 | ASN1_STRING_length(pkey)) == 0) |
0f113f3e | 969 | goto err; |
0f113f3e | 970 | } else { |
9311d0c4 | 971 | ERR_raise(ERR_LIB_EC, EC_R_MISSING_PRIVATE_KEY); |
0f113f3e MC |
972 | goto err; |
973 | } | |
974 | ||
b4c4a2c6 TM |
975 | if (EC_GROUP_get_curve_name(ret->group) == NID_sm2) |
976 | EC_KEY_set_flags(ret, EC_FLAG_SM2_RANGE); | |
977 | ||
8fdc3734 | 978 | EC_POINT_clear_free(ret->pub_key); |
0f113f3e MC |
979 | ret->pub_key = EC_POINT_new(ret->group); |
980 | if (ret->pub_key == NULL) { | |
9311d0c4 | 981 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
982 | goto err; |
983 | } | |
984 | ||
985 | if (priv_key->publicKey) { | |
986 | const unsigned char *pub_oct; | |
987 | int pub_oct_len; | |
988 | ||
17ebf85a | 989 | pub_oct = ASN1_STRING_get0_data(priv_key->publicKey); |
f422a514 | 990 | pub_oct_len = ASN1_STRING_length(priv_key->publicKey); |
6ea04154 | 991 | if (!EC_KEY_oct2key(ret, pub_oct, pub_oct_len, NULL)) { |
9311d0c4 | 992 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
993 | goto err; |
994 | } | |
995 | } else { | |
77470e98 DSH |
996 | if (ret->group->meth->keygenpub == NULL |
997 | || ret->group->meth->keygenpub(ret) == 0) | |
6903e2e7 | 998 | goto err; |
0f113f3e MC |
999 | /* Remember the original private-key-only encoding. */ |
1000 | ret->enc_flag |= EC_PKEY_NO_PUBKEY; | |
1001 | } | |
1002 | ||
9e442d48 MC |
1003 | if (a) |
1004 | *a = ret; | |
25aaa98a | 1005 | EC_PRIVATEKEY_free(priv_key); |
a46c9789 | 1006 | *in = p; |
4fe54d67 | 1007 | ret->dirty_cnt++; |
26a7d938 | 1008 | return ret; |
25aaa98a RS |
1009 | |
1010 | err: | |
1011 | if (a == NULL || *a != ret) | |
1012 | EC_KEY_free(ret); | |
1013 | EC_PRIVATEKEY_free(priv_key); | |
1014 | return NULL; | |
0f113f3e MC |
1015 | } |
1016 | ||
9fdcc21f | 1017 | int i2d_ECPrivateKey(const EC_KEY *a, unsigned char **out) |
0f113f3e MC |
1018 | { |
1019 | int ret = 0, ok = 0; | |
7fc7d1a7 | 1020 | unsigned char *priv= NULL, *pub= NULL; |
8a41fa6f | 1021 | size_t privlen = 0, publen = 0; |
7fc7d1a7 | 1022 | |
0f113f3e MC |
1023 | EC_PRIVATEKEY *priv_key = NULL; |
1024 | ||
d810700b | 1025 | if (a == NULL || a->group == NULL || |
0f113f3e | 1026 | (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) { |
9311d0c4 | 1027 | ERR_raise(ERR_LIB_EC, ERR_R_PASSED_NULL_PARAMETER); |
0f113f3e MC |
1028 | goto err; |
1029 | } | |
1030 | ||
1031 | if ((priv_key = EC_PRIVATEKEY_new()) == NULL) { | |
e077455e | 1032 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
1033 | goto err; |
1034 | } | |
1035 | ||
1036 | priv_key->version = a->version; | |
1037 | ||
7fc7d1a7 | 1038 | privlen = EC_KEY_priv2buf(a, &priv); |
30cd4ff2 | 1039 | |
7fc7d1a7 | 1040 | if (privlen == 0) { |
9311d0c4 | 1041 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
30cd4ff2 DE |
1042 | goto err; |
1043 | } | |
1044 | ||
7fc7d1a7 DSH |
1045 | ASN1_STRING_set0(priv_key->privateKey, priv, privlen); |
1046 | priv = NULL; | |
0f113f3e MC |
1047 | |
1048 | if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) { | |
1049 | if ((priv_key->parameters = | |
60b350a3 | 1050 | EC_GROUP_get_ecpkparameters(a->group, |
0f113f3e | 1051 | priv_key->parameters)) == NULL) { |
9311d0c4 | 1052 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
1053 | goto err; |
1054 | } | |
1055 | } | |
1056 | ||
1057 | if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) { | |
f422a514 | 1058 | priv_key->publicKey = ASN1_BIT_STRING_new(); |
0f113f3e | 1059 | if (priv_key->publicKey == NULL) { |
e077455e | 1060 | ERR_raise(ERR_LIB_EC, ERR_R_ASN1_LIB); |
0f113f3e MC |
1061 | goto err; |
1062 | } | |
1063 | ||
7fc7d1a7 | 1064 | publen = EC_KEY_key2buf(a, a->conv_form, &pub, NULL); |
0f113f3e | 1065 | |
7fc7d1a7 | 1066 | if (publen == 0) { |
9311d0c4 | 1067 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
1068 | goto err; |
1069 | } | |
1070 | ||
7c310e87 | 1071 | ossl_asn1_string_set_bits_left(priv_key->publicKey, 0); |
7fc7d1a7 DSH |
1072 | ASN1_STRING_set0(priv_key->publicKey, pub, publen); |
1073 | pub = NULL; | |
0f113f3e MC |
1074 | } |
1075 | ||
1076 | if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) { | |
9311d0c4 | 1077 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
1078 | goto err; |
1079 | } | |
1080 | ok = 1; | |
1081 | err: | |
7fc7d1a7 DSH |
1082 | OPENSSL_clear_free(priv, privlen); |
1083 | OPENSSL_free(pub); | |
25aaa98a | 1084 | EC_PRIVATEKEY_free(priv_key); |
0f113f3e MC |
1085 | return (ok ? ret : 0); |
1086 | } | |
14a7cfb3 | 1087 | |
9fdcc21f | 1088 | int i2d_ECParameters(const EC_KEY *a, unsigned char **out) |
0f113f3e MC |
1089 | { |
1090 | if (a == NULL) { | |
9311d0c4 | 1091 | ERR_raise(ERR_LIB_EC, ERR_R_PASSED_NULL_PARAMETER); |
0f113f3e MC |
1092 | return 0; |
1093 | } | |
1094 | return i2d_ECPKParameters(a->group, out); | |
1095 | } | |
14a7cfb3 BM |
1096 | |
1097 | EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len) | |
0f113f3e MC |
1098 | { |
1099 | EC_KEY *ret; | |
1100 | ||
1101 | if (in == NULL || *in == NULL) { | |
9311d0c4 | 1102 | ERR_raise(ERR_LIB_EC, ERR_R_PASSED_NULL_PARAMETER); |
0f113f3e MC |
1103 | return NULL; |
1104 | } | |
1105 | ||
1106 | if (a == NULL || *a == NULL) { | |
1107 | if ((ret = EC_KEY_new()) == NULL) { | |
e077455e | 1108 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
1109 | return NULL; |
1110 | } | |
0f113f3e MC |
1111 | } else |
1112 | ret = *a; | |
1113 | ||
1114 | if (!d2i_ECPKParameters(&ret->group, in, len)) { | |
5e5d53d3 MC |
1115 | if (a == NULL || *a != ret) |
1116 | EC_KEY_free(ret); | |
4fe54d67 NT |
1117 | else |
1118 | ret->dirty_cnt++; | |
0f113f3e MC |
1119 | return NULL; |
1120 | } | |
b4c4a2c6 TM |
1121 | |
1122 | if (EC_GROUP_get_curve_name(ret->group) == NID_sm2) | |
1123 | EC_KEY_set_flags(ret, EC_FLAG_SM2_RANGE); | |
1124 | ||
4fe54d67 | 1125 | ret->dirty_cnt++; |
0f113f3e | 1126 | |
5e5d53d3 MC |
1127 | if (a) |
1128 | *a = ret; | |
1129 | ||
0f113f3e MC |
1130 | return ret; |
1131 | } | |
14a7cfb3 | 1132 | |
62e3163b | 1133 | EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len) |
0f113f3e MC |
1134 | { |
1135 | EC_KEY *ret = NULL; | |
1136 | ||
1137 | if (a == NULL || (*a) == NULL || (*a)->group == NULL) { | |
1138 | /* | |
0d4fb843 | 1139 | * sorry, but a EC_GROUP-structure is necessary to set the public key |
0f113f3e | 1140 | */ |
9311d0c4 | 1141 | ERR_raise(ERR_LIB_EC, ERR_R_PASSED_NULL_PARAMETER); |
0f113f3e MC |
1142 | return 0; |
1143 | } | |
1144 | ret = *a; | |
4fe54d67 | 1145 | /* EC_KEY_opt2key updates dirty_cnt */ |
6ea04154 | 1146 | if (!EC_KEY_oct2key(ret, *in, len, NULL)) { |
9311d0c4 | 1147 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
1148 | return 0; |
1149 | } | |
0f113f3e MC |
1150 | *in += len; |
1151 | return ret; | |
1152 | } | |
14a7cfb3 | 1153 | |
60c25873 | 1154 | int i2o_ECPublicKey(const EC_KEY *a, unsigned char **out) |
0f113f3e MC |
1155 | { |
1156 | size_t buf_len = 0; | |
1157 | int new_buffer = 0; | |
1158 | ||
1159 | if (a == NULL) { | |
9311d0c4 | 1160 | ERR_raise(ERR_LIB_EC, ERR_R_PASSED_NULL_PARAMETER); |
0f113f3e MC |
1161 | return 0; |
1162 | } | |
1163 | ||
1164 | buf_len = EC_POINT_point2oct(a->group, a->pub_key, | |
1165 | a->conv_form, NULL, 0, NULL); | |
1166 | ||
1167 | if (out == NULL || buf_len == 0) | |
1168 | /* out == NULL => just return the length of the octet string */ | |
1169 | return buf_len; | |
1170 | ||
1171 | if (*out == NULL) { | |
e077455e | 1172 | if ((*out = OPENSSL_malloc(buf_len)) == NULL) |
0f113f3e | 1173 | return 0; |
0f113f3e MC |
1174 | new_buffer = 1; |
1175 | } | |
1176 | if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form, | |
1177 | *out, buf_len, NULL)) { | |
9311d0c4 | 1178 | ERR_raise(ERR_LIB_EC, ERR_R_EC_LIB); |
0f113f3e MC |
1179 | if (new_buffer) { |
1180 | OPENSSL_free(*out); | |
1181 | *out = NULL; | |
1182 | } | |
1183 | return 0; | |
1184 | } | |
1185 | if (!new_buffer) | |
1186 | *out += buf_len; | |
1187 | return buf_len; | |
1188 | } | |
2d3d00dc | 1189 | |
9fdcc21f DO |
1190 | DECLARE_ASN1_FUNCTIONS(ECDSA_SIG) |
1191 | DECLARE_ASN1_ENCODE_FUNCTIONS_name(ECDSA_SIG, ECDSA_SIG) | |
8cc44d97 | 1192 | |
f844f9eb | 1193 | #endif /* FIPS_MODULE */ |
a9612d6c | 1194 | |
8cc44d97 DSH |
1195 | ECDSA_SIG *ECDSA_SIG_new(void) |
1196 | { | |
1197 | ECDSA_SIG *sig = OPENSSL_zalloc(sizeof(*sig)); | |
e077455e | 1198 | |
8cc44d97 DSH |
1199 | return sig; |
1200 | } | |
1201 | ||
1202 | void ECDSA_SIG_free(ECDSA_SIG *sig) | |
1203 | { | |
1204 | if (sig == NULL) | |
1205 | return; | |
1206 | BN_clear_free(sig->r); | |
1207 | BN_clear_free(sig->s); | |
1208 | OPENSSL_free(sig); | |
1209 | } | |
7236e3c8 | 1210 | |
54846b7c DM |
1211 | ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **psig, const unsigned char **ppin, long len) |
1212 | { | |
1213 | ECDSA_SIG *sig; | |
1214 | ||
1215 | if (len < 0) | |
1216 | return NULL; | |
1217 | if (psig != NULL && *psig != NULL) { | |
1218 | sig = *psig; | |
1219 | } else { | |
1220 | sig = ECDSA_SIG_new(); | |
1221 | if (sig == NULL) | |
1222 | return NULL; | |
1223 | } | |
1224 | if (sig->r == NULL) | |
1225 | sig->r = BN_new(); | |
1226 | if (sig->s == NULL) | |
1227 | sig->s = BN_new(); | |
9dddcd90 | 1228 | if (sig->r == NULL || sig->s == NULL |
1229 | || ossl_decode_der_dsa_sig(sig->r, sig->s, ppin, (size_t)len) == 0) { | |
54846b7c DM |
1230 | if (psig == NULL || *psig == NULL) |
1231 | ECDSA_SIG_free(sig); | |
1232 | return NULL; | |
1233 | } | |
1234 | if (psig != NULL && *psig == NULL) | |
1235 | *psig = sig; | |
1236 | return sig; | |
1237 | } | |
1238 | ||
1239 | int i2d_ECDSA_SIG(const ECDSA_SIG *sig, unsigned char **ppout) | |
1240 | { | |
b8805834 | 1241 | BUF_MEM *buf = NULL; |
54846b7c | 1242 | size_t encoded_len; |
b8805834 | 1243 | WPACKET pkt; |
54846b7c | 1244 | |
b8805834 MC |
1245 | if (ppout == NULL) { |
1246 | if (!WPACKET_init_null(&pkt, 0)) | |
54846b7c | 1247 | return -1; |
b8805834 MC |
1248 | } else if (*ppout == NULL) { |
1249 | if ((buf = BUF_MEM_new()) == NULL | |
1250 | || !WPACKET_init_len(&pkt, buf, 0)) { | |
1251 | BUF_MEM_free(buf); | |
54846b7c | 1252 | return -1; |
b8805834 | 1253 | } |
54846b7c | 1254 | } else { |
b8805834 MC |
1255 | if (!WPACKET_init_static_len(&pkt, *ppout, SIZE_MAX, 0)) |
1256 | return -1; | |
54846b7c | 1257 | } |
b8805834 | 1258 | |
2858156e | 1259 | if (!ossl_encode_der_dsa_sig(&pkt, sig->r, sig->s) |
b8805834 MC |
1260 | || !WPACKET_get_total_written(&pkt, &encoded_len) |
1261 | || !WPACKET_finish(&pkt)) { | |
1262 | BUF_MEM_free(buf); | |
1263 | WPACKET_cleanup(&pkt); | |
54846b7c DM |
1264 | return -1; |
1265 | } | |
b8805834 MC |
1266 | |
1267 | if (ppout != NULL) { | |
1268 | if (*ppout == NULL) { | |
1269 | *ppout = (unsigned char *)buf->data; | |
1270 | buf->data = NULL; | |
1271 | BUF_MEM_free(buf); | |
1272 | } else { | |
1273 | *ppout += encoded_len; | |
1274 | } | |
1275 | } | |
1276 | ||
54846b7c DM |
1277 | return (int)encoded_len; |
1278 | } | |
1279 | ||
9267c11b | 1280 | void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps) |
7236e3c8 | 1281 | { |
91e7bcc2 | 1282 | if (pr != NULL) |
7236e3c8 | 1283 | *pr = sig->r; |
91e7bcc2 | 1284 | if (ps != NULL) |
7236e3c8 DSH |
1285 | *ps = sig->s; |
1286 | } | |
cf517a6d | 1287 | |
0396401d DMSP |
1288 | const BIGNUM *ECDSA_SIG_get0_r(const ECDSA_SIG *sig) |
1289 | { | |
1290 | return sig->r; | |
1291 | } | |
1292 | ||
1293 | const BIGNUM *ECDSA_SIG_get0_s(const ECDSA_SIG *sig) | |
1294 | { | |
1295 | return sig->s; | |
1296 | } | |
1297 | ||
7ca3ea22 | 1298 | int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s) |
6a571a18 | 1299 | { |
bbaa9dd8 TS |
1300 | if (r == NULL || s == NULL) |
1301 | return 0; | |
6a571a18 TS |
1302 | BN_clear_free(sig->r); |
1303 | BN_clear_free(sig->s); | |
1304 | sig->r = r; | |
1305 | sig->s = s; | |
1306 | return 1; | |
1307 | } | |
1308 | ||
88b4c612 | 1309 | int ECDSA_size(const EC_KEY *ec) |
cf517a6d | 1310 | { |
88b4c612 SL |
1311 | int ret; |
1312 | ECDSA_SIG sig; | |
cf517a6d | 1313 | const EC_GROUP *group; |
88b4c612 | 1314 | const BIGNUM *bn; |
cf517a6d | 1315 | |
88b4c612 | 1316 | if (ec == NULL) |
cf517a6d | 1317 | return 0; |
88b4c612 | 1318 | group = EC_KEY_get0_group(ec); |
cf517a6d DSH |
1319 | if (group == NULL) |
1320 | return 0; | |
1321 | ||
88b4c612 SL |
1322 | bn = EC_GROUP_get0_order(group); |
1323 | if (bn == NULL) | |
cf517a6d | 1324 | return 0; |
88b4c612 SL |
1325 | |
1326 | sig.r = sig.s = (BIGNUM *)bn; | |
1327 | ret = i2d_ECDSA_SIG(&sig, NULL); | |
1328 | ||
1329 | if (ret < 0) | |
1330 | ret = 0; | |
26a7d938 | 1331 | return ret; |
cf517a6d | 1332 | } |