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Commit | Line | Data |
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7e31164a | 1 | /* |
48e5119a | 2 | * Copyright 2002-2018 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 | ||
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" |
54846b7c | 16 | #include "internal/asn1_dsa.h" |
012c86ab | 17 | |
34f1f2a8 | 18 | int EC_GROUP_get_basis_type(const EC_GROUP *group) |
0f113f3e | 19 | { |
57f48f93 | 20 | int i; |
0f113f3e MC |
21 | |
22 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != | |
23 | NID_X9_62_characteristic_two_field) | |
24 | /* everything else is currently not supported */ | |
25 | return 0; | |
26 | ||
57f48f93 RS |
27 | /* Find the last non-zero element of group->poly[] */ |
28 | for (i = 0; | |
50799f35 | 29 | i < (int)OSSL_NELEM(group->poly) && group->poly[i] != 0; |
57f48f93 RS |
30 | i++) |
31 | continue; | |
0f113f3e MC |
32 | |
33 | if (i == 4) | |
34 | return NID_X9_62_ppBasis; | |
35 | else if (i == 2) | |
36 | return NID_X9_62_tpBasis; | |
37 | else | |
38 | /* everything else is currently not supported */ | |
39 | return 0; | |
40 | } | |
41 | ||
b3310161 | 42 | #ifndef OPENSSL_NO_EC2M |
34f1f2a8 | 43 | int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k) |
0f113f3e MC |
44 | { |
45 | if (group == NULL) | |
46 | return 0; | |
47 | ||
48 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != | |
49 | NID_X9_62_characteristic_two_field | |
50 | || !((group->poly[0] != 0) && (group->poly[1] != 0) | |
51 | && (group->poly[2] == 0))) { | |
52 | ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS, | |
53 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
54 | return 0; | |
55 | } | |
56 | ||
57 | if (k) | |
58 | *k = group->poly[1]; | |
59 | ||
60 | return 1; | |
61 | } | |
62 | ||
34f1f2a8 | 63 | int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1, |
0f113f3e MC |
64 | unsigned int *k2, unsigned int *k3) |
65 | { | |
66 | if (group == NULL) | |
67 | return 0; | |
68 | ||
69 | if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != | |
70 | NID_X9_62_characteristic_two_field | |
71 | || !((group->poly[0] != 0) && (group->poly[1] != 0) | |
72 | && (group->poly[2] != 0) && (group->poly[3] != 0) | |
73 | && (group->poly[4] == 0))) { | |
74 | ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS, | |
75 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
76 | return 0; | |
77 | } | |
78 | ||
79 | if (k1) | |
80 | *k1 = group->poly[3]; | |
81 | if (k2) | |
82 | *k2 = group->poly[2]; | |
83 | if (k3) | |
84 | *k3 = group->poly[1]; | |
85 | ||
86 | return 1; | |
87 | } | |
b3310161 | 88 | #endif |
8aefe253 | 89 | |
012c86ab | 90 | /* some structures needed for the asn1 encoding */ |
012c86ab | 91 | typedef struct x9_62_pentanomial_st { |
6a32a3c0 RL |
92 | int32_t k1; |
93 | int32_t k2; | |
94 | int32_t k3; | |
0f113f3e | 95 | } X9_62_PENTANOMIAL; |
012c86ab | 96 | |
37af03d3 | 97 | typedef struct x9_62_characteristic_two_st { |
6a32a3c0 | 98 | int32_t m; |
0f113f3e MC |
99 | ASN1_OBJECT *type; |
100 | union { | |
101 | char *ptr; | |
102 | /* NID_X9_62_onBasis */ | |
103 | ASN1_NULL *onBasis; | |
104 | /* NID_X9_62_tpBasis */ | |
105 | ASN1_INTEGER *tpBasis; | |
106 | /* NID_X9_62_ppBasis */ | |
107 | X9_62_PENTANOMIAL *ppBasis; | |
108 | /* anything else */ | |
109 | ASN1_TYPE *other; | |
110 | } p; | |
111 | } X9_62_CHARACTERISTIC_TWO; | |
37af03d3 GT |
112 | |
113 | typedef struct x9_62_fieldid_st { | |
0f113f3e MC |
114 | ASN1_OBJECT *fieldType; |
115 | union { | |
116 | char *ptr; | |
117 | /* NID_X9_62_prime_field */ | |
118 | ASN1_INTEGER *prime; | |
119 | /* NID_X9_62_characteristic_two_field */ | |
120 | X9_62_CHARACTERISTIC_TWO *char_two; | |
121 | /* anything else */ | |
122 | ASN1_TYPE *other; | |
123 | } p; | |
124 | } X9_62_FIELDID; | |
37af03d3 | 125 | |
012c86ab | 126 | typedef struct x9_62_curve_st { |
0f113f3e MC |
127 | ASN1_OCTET_STRING *a; |
128 | ASN1_OCTET_STRING *b; | |
129 | ASN1_BIT_STRING *seed; | |
130 | } X9_62_CURVE; | |
012c86ab | 131 | |
03f880e4 | 132 | struct ec_parameters_st { |
6a32a3c0 | 133 | int32_t version; |
0f113f3e MC |
134 | X9_62_FIELDID *fieldID; |
135 | X9_62_CURVE *curve; | |
136 | ASN1_OCTET_STRING *base; | |
137 | ASN1_INTEGER *order; | |
138 | ASN1_INTEGER *cofactor; | |
03f880e4 | 139 | } /* ECPARAMETERS */ ; |
012c86ab BM |
140 | |
141 | struct ecpk_parameters_st { | |
0f113f3e MC |
142 | int type; |
143 | union { | |
144 | ASN1_OBJECT *named_curve; | |
145 | ECPARAMETERS *parameters; | |
146 | ASN1_NULL *implicitlyCA; | |
147 | } value; | |
148 | } /* ECPKPARAMETERS */ ; | |
012c86ab | 149 | |
14a7cfb3 BM |
150 | /* SEC1 ECPrivateKey */ |
151 | typedef struct ec_privatekey_st { | |
6a32a3c0 | 152 | int32_t version; |
0f113f3e MC |
153 | ASN1_OCTET_STRING *privateKey; |
154 | ECPKPARAMETERS *parameters; | |
155 | ASN1_BIT_STRING *publicKey; | |
156 | } EC_PRIVATEKEY; | |
14a7cfb3 | 157 | |
37af03d3 GT |
158 | /* the OpenSSL ASN.1 definitions */ |
159 | ASN1_SEQUENCE(X9_62_PENTANOMIAL) = { | |
9612e157 RL |
160 | ASN1_EMBED(X9_62_PENTANOMIAL, k1, INT32), |
161 | ASN1_EMBED(X9_62_PENTANOMIAL, k2, INT32), | |
162 | ASN1_EMBED(X9_62_PENTANOMIAL, k3, INT32) | |
df2ee0e2 | 163 | } static_ASN1_SEQUENCE_END(X9_62_PENTANOMIAL) |
012c86ab | 164 | |
37af03d3 GT |
165 | DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL) |
166 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL) | |
167 | ||
168 | ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other, ASN1_ANY); | |
012c86ab | 169 | |
37af03d3 | 170 | ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = { |
0f113f3e MC |
171 | ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onBasis, ASN1_NULL)), |
172 | ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpBasis, ASN1_INTEGER)), | |
173 | ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppBasis, X9_62_PENTANOMIAL)) | |
37af03d3 | 174 | } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL); |
012c86ab BM |
175 | |
176 | ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = { | |
9612e157 | 177 | ASN1_EMBED(X9_62_CHARACTERISTIC_TWO, m, INT32), |
0f113f3e MC |
178 | ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT), |
179 | ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO) | |
df2ee0e2 | 180 | } static_ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO) |
012c86ab | 181 | |
37af03d3 GT |
182 | DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO) |
183 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO) | |
012c86ab | 184 | |
37af03d3 GT |
185 | ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY); |
186 | ||
187 | ASN1_ADB(X9_62_FIELDID) = { | |
0f113f3e MC |
188 | ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN1_INTEGER)), |
189 | ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID, p.char_two, X9_62_CHARACTERISTIC_TWO)) | |
37af03d3 | 190 | } ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL); |
012c86ab | 191 | |
37af03d3 | 192 | ASN1_SEQUENCE(X9_62_FIELDID) = { |
0f113f3e MC |
193 | ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT), |
194 | ASN1_ADB_OBJECT(X9_62_FIELDID) | |
df2ee0e2 | 195 | } static_ASN1_SEQUENCE_END(X9_62_FIELDID) |
012c86ab BM |
196 | |
197 | ASN1_SEQUENCE(X9_62_CURVE) = { | |
0f113f3e MC |
198 | ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING), |
199 | ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING), | |
200 | ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING) | |
df2ee0e2 | 201 | } static_ASN1_SEQUENCE_END(X9_62_CURVE) |
012c86ab | 202 | |
012c86ab | 203 | ASN1_SEQUENCE(ECPARAMETERS) = { |
9612e157 | 204 | ASN1_EMBED(ECPARAMETERS, version, INT32), |
0f113f3e MC |
205 | ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID), |
206 | ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE), | |
207 | ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING), | |
208 | ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER), | |
209 | ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER) | |
60b350a3 | 210 | } ASN1_SEQUENCE_END(ECPARAMETERS) |
012c86ab | 211 | |
37af03d3 GT |
212 | DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) |
213 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) | |
012c86ab BM |
214 | |
215 | ASN1_CHOICE(ECPKPARAMETERS) = { | |
0f113f3e MC |
216 | ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT), |
217 | ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS), | |
218 | ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL) | |
60b350a3 | 219 | } ASN1_CHOICE_END(ECPKPARAMETERS) |
012c86ab | 220 | |
9fdcc21f DO |
221 | DECLARE_ASN1_FUNCTIONS(ECPKPARAMETERS) |
222 | DECLARE_ASN1_ENCODE_FUNCTIONS_name(ECPKPARAMETERS, ECPKPARAMETERS) | |
223 | IMPLEMENT_ASN1_FUNCTIONS(ECPKPARAMETERS) | |
012c86ab | 224 | |
0bee0e62 | 225 | ASN1_SEQUENCE(EC_PRIVATEKEY) = { |
9612e157 | 226 | ASN1_EMBED(EC_PRIVATEKEY, version, INT32), |
0f113f3e MC |
227 | ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING), |
228 | ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0), | |
229 | ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1) | |
df2ee0e2 | 230 | } static_ASN1_SEQUENCE_END(EC_PRIVATEKEY) |
0bee0e62 | 231 | |
9fdcc21f DO |
232 | DECLARE_ASN1_FUNCTIONS(EC_PRIVATEKEY) |
233 | DECLARE_ASN1_ENCODE_FUNCTIONS_name(EC_PRIVATEKEY, EC_PRIVATEKEY) | |
234 | IMPLEMENT_ASN1_FUNCTIONS(EC_PRIVATEKEY) | |
0bee0e62 | 235 | |
7e31164a | 236 | /* some declarations of internal function */ |
012c86ab | 237 | |
0f113f3e | 238 | /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */ |
37af03d3 | 239 | static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *); |
0f113f3e | 240 | /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */ |
37af03d3 | 241 | static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *); |
7e31164a BM |
242 | |
243 | /* the function definitions */ | |
012c86ab | 244 | |
37af03d3 | 245 | static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field) |
0f113f3e MC |
246 | { |
247 | int ok = 0, nid; | |
248 | BIGNUM *tmp = NULL; | |
249 | ||
250 | if (group == NULL || field == NULL) | |
251 | return 0; | |
252 | ||
253 | /* clear the old values (if necessary) */ | |
0dfb9398 | 254 | ASN1_OBJECT_free(field->fieldType); |
2ace7450 | 255 | ASN1_TYPE_free(field->p.other); |
0f113f3e MC |
256 | |
257 | nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group)); | |
258 | /* set OID for the field */ | |
259 | if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) { | |
260 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
261 | goto err; | |
262 | } | |
263 | ||
264 | if (nid == NID_X9_62_prime_field) { | |
265 | if ((tmp = BN_new()) == NULL) { | |
266 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
267 | goto err; | |
268 | } | |
269 | /* the parameters are specified by the prime number p */ | |
9cc570d4 | 270 | if (!EC_GROUP_get_curve(group, tmp, NULL, NULL, NULL)) { |
0f113f3e MC |
271 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); |
272 | goto err; | |
273 | } | |
274 | /* set the prime number */ | |
275 | field->p.prime = BN_to_ASN1_INTEGER(tmp, NULL); | |
276 | if (field->p.prime == NULL) { | |
277 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB); | |
278 | goto err; | |
279 | } | |
6903e2e7 | 280 | } else if (nid == NID_X9_62_characteristic_two_field) |
b3310161 | 281 | #ifdef OPENSSL_NO_EC2M |
0f113f3e MC |
282 | { |
283 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED); | |
284 | goto err; | |
285 | } | |
b3310161 | 286 | #else |
0f113f3e MC |
287 | { |
288 | int field_type; | |
289 | X9_62_CHARACTERISTIC_TWO *char_two; | |
290 | ||
291 | field->p.char_two = X9_62_CHARACTERISTIC_TWO_new(); | |
292 | char_two = field->p.char_two; | |
293 | ||
294 | if (char_two == NULL) { | |
295 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
296 | goto err; | |
297 | } | |
298 | ||
299 | char_two->m = (long)EC_GROUP_get_degree(group); | |
300 | ||
301 | field_type = EC_GROUP_get_basis_type(group); | |
302 | ||
303 | if (field_type == 0) { | |
304 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); | |
305 | goto err; | |
306 | } | |
307 | /* set base type OID */ | |
308 | if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) { | |
309 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
310 | goto err; | |
311 | } | |
312 | ||
313 | if (field_type == NID_X9_62_tpBasis) { | |
314 | unsigned int k; | |
315 | ||
316 | if (!EC_GROUP_get_trinomial_basis(group, &k)) | |
317 | goto err; | |
318 | ||
319 | char_two->p.tpBasis = ASN1_INTEGER_new(); | |
90945fa3 | 320 | if (char_two->p.tpBasis == NULL) { |
0f113f3e MC |
321 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); |
322 | goto err; | |
323 | } | |
324 | if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) { | |
325 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB); | |
326 | goto err; | |
327 | } | |
328 | } else if (field_type == NID_X9_62_ppBasis) { | |
329 | unsigned int k1, k2, k3; | |
330 | ||
331 | if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3)) | |
332 | goto err; | |
333 | ||
334 | char_two->p.ppBasis = X9_62_PENTANOMIAL_new(); | |
90945fa3 | 335 | if (char_two->p.ppBasis == NULL) { |
0f113f3e MC |
336 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); |
337 | goto err; | |
338 | } | |
339 | ||
340 | /* set k? values */ | |
341 | char_two->p.ppBasis->k1 = (long)k1; | |
342 | char_two->p.ppBasis->k2 = (long)k2; | |
343 | char_two->p.ppBasis->k3 = (long)k3; | |
344 | } else { /* field_type == NID_X9_62_onBasis */ | |
345 | ||
346 | /* for ONB the parameters are (asn1) NULL */ | |
347 | char_two->p.onBasis = ASN1_NULL_new(); | |
90945fa3 | 348 | if (char_two->p.onBasis == NULL) { |
0f113f3e MC |
349 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); |
350 | goto err; | |
351 | } | |
352 | } | |
353 | } | |
b3310161 | 354 | #endif |
6903e2e7 DSH |
355 | else { |
356 | ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_UNSUPPORTED_FIELD); | |
357 | goto err; | |
358 | } | |
012c86ab | 359 | |
0f113f3e | 360 | ok = 1; |
012c86ab | 361 | |
23a1d5e9 RS |
362 | err: |
363 | BN_free(tmp); | |
26a7d938 | 364 | return ok; |
012c86ab BM |
365 | } |
366 | ||
37af03d3 | 367 | static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve) |
0f113f3e | 368 | { |
9cc570d4 | 369 | int ok = 0; |
0f113f3e | 370 | BIGNUM *tmp_1 = NULL, *tmp_2 = NULL; |
fc6f579a DB |
371 | unsigned char *a_buf = NULL, *b_buf = NULL; |
372 | size_t len; | |
0f113f3e MC |
373 | |
374 | if (!group || !curve || !curve->a || !curve->b) | |
375 | return 0; | |
376 | ||
377 | if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) { | |
378 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
379 | goto err; | |
380 | } | |
381 | ||
0f113f3e | 382 | /* get a and b */ |
9cc570d4 MC |
383 | if (!EC_GROUP_get_curve(group, NULL, tmp_1, tmp_2, NULL)) { |
384 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB); | |
385 | goto err; | |
0f113f3e | 386 | } |
0f113f3e | 387 | |
fc6f579a DB |
388 | /* |
389 | * Per SEC 1, the curve coefficients must be padded up to size. See C.2's | |
390 | * definition of Curve, C.1's definition of FieldElement, and 2.3.5's | |
391 | * definition of how to encode the field elements. | |
392 | */ | |
393 | len = ((size_t)EC_GROUP_get_degree(group) + 7) / 8; | |
394 | if ((a_buf = OPENSSL_malloc(len)) == NULL | |
395 | || (b_buf = OPENSSL_malloc(len)) == NULL) { | |
396 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
397 | goto err; | |
0f113f3e | 398 | } |
fc6f579a DB |
399 | if (BN_bn2binpad(tmp_1, a_buf, len) < 0 |
400 | || BN_bn2binpad(tmp_2, b_buf, len) < 0) { | |
401 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB); | |
402 | goto err; | |
0f113f3e MC |
403 | } |
404 | ||
405 | /* set a and b */ | |
fc6f579a DB |
406 | if (!ASN1_OCTET_STRING_set(curve->a, a_buf, len) |
407 | || !ASN1_OCTET_STRING_set(curve->b, b_buf, len)) { | |
0f113f3e MC |
408 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); |
409 | goto err; | |
410 | } | |
411 | ||
412 | /* set the seed (optional) */ | |
413 | if (group->seed) { | |
414 | if (!curve->seed) | |
415 | if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) { | |
416 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
417 | goto err; | |
418 | } | |
419 | curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
420 | curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
421 | if (!ASN1_BIT_STRING_set(curve->seed, group->seed, | |
422 | (int)group->seed_len)) { | |
423 | ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); | |
424 | goto err; | |
425 | } | |
426 | } else { | |
2ace7450 RS |
427 | ASN1_BIT_STRING_free(curve->seed); |
428 | curve->seed = NULL; | |
0f113f3e MC |
429 | } |
430 | ||
431 | ok = 1; | |
432 | ||
23a1d5e9 | 433 | err: |
fc6f579a DB |
434 | OPENSSL_free(a_buf); |
435 | OPENSSL_free(b_buf); | |
23a1d5e9 RS |
436 | BN_free(tmp_1); |
437 | BN_free(tmp_2); | |
26a7d938 | 438 | return ok; |
0f113f3e | 439 | } |
012c86ab | 440 | |
60b350a3 RS |
441 | ECPARAMETERS *EC_GROUP_get_ecparameters(const EC_GROUP *group, |
442 | ECPARAMETERS *params) | |
0f113f3e | 443 | { |
0f113f3e MC |
444 | size_t len = 0; |
445 | ECPARAMETERS *ret = NULL; | |
be2e334f | 446 | const BIGNUM *tmp; |
0f113f3e MC |
447 | unsigned char *buffer = NULL; |
448 | const EC_POINT *point = NULL; | |
449 | point_conversion_form_t form; | |
450 | ||
60b350a3 | 451 | if (params == NULL) { |
0f113f3e | 452 | if ((ret = ECPARAMETERS_new()) == NULL) { |
60b350a3 | 453 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
454 | goto err; |
455 | } | |
456 | } else | |
60b350a3 | 457 | ret = params; |
0f113f3e MC |
458 | |
459 | /* set the version (always one) */ | |
460 | ret->version = (long)0x1; | |
461 | ||
462 | /* set the fieldID */ | |
463 | if (!ec_asn1_group2fieldid(group, ret->fieldID)) { | |
60b350a3 | 464 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
465 | goto err; |
466 | } | |
467 | ||
468 | /* set the curve */ | |
469 | if (!ec_asn1_group2curve(group, ret->curve)) { | |
60b350a3 | 470 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
471 | goto err; |
472 | } | |
473 | ||
474 | /* set the base point */ | |
475 | if ((point = EC_GROUP_get0_generator(group)) == NULL) { | |
60b350a3 | 476 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, EC_R_UNDEFINED_GENERATOR); |
0f113f3e MC |
477 | goto err; |
478 | } | |
479 | ||
480 | form = EC_GROUP_get_point_conversion_form(group); | |
481 | ||
981bd8a2 | 482 | len = EC_POINT_point2buf(group, point, form, &buffer, NULL); |
0f113f3e | 483 | if (len == 0) { |
60b350a3 | 484 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
485 | goto err; |
486 | } | |
0f113f3e | 487 | if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) { |
0110a470 | 488 | OPENSSL_free(buffer); |
60b350a3 | 489 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
490 | goto err; |
491 | } | |
0110a470 | 492 | ASN1_STRING_set0(ret->base, buffer, len); |
0f113f3e MC |
493 | |
494 | /* set the order */ | |
be2e334f DSH |
495 | tmp = EC_GROUP_get0_order(group); |
496 | if (tmp == NULL) { | |
60b350a3 | 497 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
498 | goto err; |
499 | } | |
500 | ret->order = BN_to_ASN1_INTEGER(tmp, ret->order); | |
501 | if (ret->order == NULL) { | |
60b350a3 | 502 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB); |
0f113f3e MC |
503 | goto err; |
504 | } | |
505 | ||
506 | /* set the cofactor (optional) */ | |
be2e334f DSH |
507 | tmp = EC_GROUP_get0_cofactor(group); |
508 | if (tmp != NULL) { | |
0f113f3e MC |
509 | ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor); |
510 | if (ret->cofactor == NULL) { | |
60b350a3 | 511 | ECerr(EC_F_EC_GROUP_GET_ECPARAMETERS, ERR_R_ASN1_LIB); |
0f113f3e MC |
512 | goto err; |
513 | } | |
514 | } | |
515 | ||
23a1d5e9 | 516 | return ret; |
0f113f3e | 517 | |
23a1d5e9 | 518 | err: |
60b350a3 | 519 | if (params == NULL) |
23a1d5e9 | 520 | ECPARAMETERS_free(ret); |
23a1d5e9 | 521 | return NULL; |
0f113f3e MC |
522 | } |
523 | ||
60b350a3 RS |
524 | ECPKPARAMETERS *EC_GROUP_get_ecpkparameters(const EC_GROUP *group, |
525 | ECPKPARAMETERS *params) | |
0f113f3e MC |
526 | { |
527 | int ok = 1, tmp; | |
528 | ECPKPARAMETERS *ret = params; | |
529 | ||
530 | if (ret == NULL) { | |
531 | if ((ret = ECPKPARAMETERS_new()) == NULL) { | |
60b350a3 | 532 | ECerr(EC_F_EC_GROUP_GET_ECPKPARAMETERS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
533 | return NULL; |
534 | } | |
535 | } else { | |
0dfb9398 | 536 | if (ret->type == 0) |
0f113f3e MC |
537 | ASN1_OBJECT_free(ret->value.named_curve); |
538 | else if (ret->type == 1 && ret->value.parameters) | |
539 | ECPARAMETERS_free(ret->value.parameters); | |
540 | } | |
541 | ||
542 | if (EC_GROUP_get_asn1_flag(group)) { | |
543 | /* | |
436ad81f | 544 | * use the asn1 OID to describe the elliptic curve parameters |
0f113f3e MC |
545 | */ |
546 | tmp = EC_GROUP_get_curve_name(group); | |
547 | if (tmp) { | |
548 | ret->type = 0; | |
549 | if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL) | |
550 | ok = 0; | |
551 | } else | |
0d4fb843 | 552 | /* we don't know the nid => ERROR */ |
0f113f3e MC |
553 | ok = 0; |
554 | } else { | |
555 | /* use the ECPARAMETERS structure */ | |
556 | ret->type = 1; | |
557 | if ((ret->value.parameters = | |
60b350a3 | 558 | EC_GROUP_get_ecparameters(group, NULL)) == NULL) |
0f113f3e MC |
559 | ok = 0; |
560 | } | |
561 | ||
562 | if (!ok) { | |
563 | ECPKPARAMETERS_free(ret); | |
564 | return NULL; | |
565 | } | |
566 | return ret; | |
567 | } | |
012c86ab | 568 | |
60b350a3 | 569 | EC_GROUP *EC_GROUP_new_from_ecparameters(const ECPARAMETERS *params) |
0f113f3e MC |
570 | { |
571 | int ok = 0, tmp; | |
572 | EC_GROUP *ret = NULL; | |
573 | BIGNUM *p = NULL, *a = NULL, *b = NULL; | |
574 | EC_POINT *point = NULL; | |
575 | long field_bits; | |
576 | ||
577 | if (!params->fieldID || !params->fieldID->fieldType || | |
578 | !params->fieldID->p.ptr) { | |
60b350a3 | 579 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
580 | goto err; |
581 | } | |
582 | ||
fc6f579a DB |
583 | /* |
584 | * Now extract the curve parameters a and b. Note that, although SEC 1 | |
585 | * specifies the length of their encodings, historical versions of OpenSSL | |
586 | * encoded them incorrectly, so we must accept any length for backwards | |
587 | * compatibility. | |
588 | */ | |
0f113f3e MC |
589 | if (!params->curve || !params->curve->a || |
590 | !params->curve->a->data || !params->curve->b || | |
591 | !params->curve->b->data) { | |
60b350a3 | 592 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
593 | goto err; |
594 | } | |
595 | a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL); | |
596 | if (a == NULL) { | |
60b350a3 | 597 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB); |
0f113f3e MC |
598 | goto err; |
599 | } | |
600 | b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL); | |
601 | if (b == NULL) { | |
60b350a3 | 602 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_BN_LIB); |
0f113f3e MC |
603 | goto err; |
604 | } | |
605 | ||
606 | /* get the field parameters */ | |
607 | tmp = OBJ_obj2nid(params->fieldID->fieldType); | |
608 | if (tmp == NID_X9_62_characteristic_two_field) | |
b3310161 | 609 | #ifdef OPENSSL_NO_EC2M |
0f113f3e | 610 | { |
60b350a3 | 611 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_GF2M_NOT_SUPPORTED); |
0f113f3e MC |
612 | goto err; |
613 | } | |
b3310161 | 614 | #else |
0f113f3e MC |
615 | { |
616 | X9_62_CHARACTERISTIC_TWO *char_two; | |
617 | ||
618 | char_two = params->fieldID->p.char_two; | |
619 | ||
620 | field_bits = char_two->m; | |
621 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
60b350a3 | 622 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE); |
0f113f3e MC |
623 | goto err; |
624 | } | |
625 | ||
626 | if ((p = BN_new()) == NULL) { | |
60b350a3 | 627 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
628 | goto err; |
629 | } | |
630 | ||
631 | /* get the base type */ | |
632 | tmp = OBJ_obj2nid(char_two->type); | |
633 | ||
634 | if (tmp == NID_X9_62_tpBasis) { | |
635 | long tmp_long; | |
636 | ||
637 | if (!char_two->p.tpBasis) { | |
60b350a3 | 638 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
639 | goto err; |
640 | } | |
641 | ||
642 | tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis); | |
643 | ||
644 | if (!(char_two->m > tmp_long && tmp_long > 0)) { | |
60b350a3 | 645 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, |
0f113f3e MC |
646 | EC_R_INVALID_TRINOMIAL_BASIS); |
647 | goto err; | |
648 | } | |
649 | ||
650 | /* create the polynomial */ | |
651 | if (!BN_set_bit(p, (int)char_two->m)) | |
652 | goto err; | |
653 | if (!BN_set_bit(p, (int)tmp_long)) | |
654 | goto err; | |
655 | if (!BN_set_bit(p, 0)) | |
656 | goto err; | |
657 | } else if (tmp == NID_X9_62_ppBasis) { | |
658 | X9_62_PENTANOMIAL *penta; | |
659 | ||
660 | penta = char_two->p.ppBasis; | |
661 | if (!penta) { | |
60b350a3 | 662 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
663 | goto err; |
664 | } | |
665 | ||
666 | if (! | |
667 | (char_two->m > penta->k3 && penta->k3 > penta->k2 | |
668 | && penta->k2 > penta->k1 && penta->k1 > 0)) { | |
60b350a3 | 669 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, |
0f113f3e MC |
670 | EC_R_INVALID_PENTANOMIAL_BASIS); |
671 | goto err; | |
672 | } | |
673 | ||
674 | /* create the polynomial */ | |
675 | if (!BN_set_bit(p, (int)char_two->m)) | |
676 | goto err; | |
677 | if (!BN_set_bit(p, (int)penta->k1)) | |
678 | goto err; | |
679 | if (!BN_set_bit(p, (int)penta->k2)) | |
680 | goto err; | |
681 | if (!BN_set_bit(p, (int)penta->k3)) | |
682 | goto err; | |
683 | if (!BN_set_bit(p, 0)) | |
684 | goto err; | |
685 | } else if (tmp == NID_X9_62_onBasis) { | |
60b350a3 | 686 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_NOT_IMPLEMENTED); |
0f113f3e MC |
687 | goto err; |
688 | } else { /* error */ | |
689 | ||
60b350a3 | 690 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
691 | goto err; |
692 | } | |
693 | ||
694 | /* create the EC_GROUP structure */ | |
695 | ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL); | |
696 | } | |
b3310161 | 697 | #endif |
0f113f3e MC |
698 | else if (tmp == NID_X9_62_prime_field) { |
699 | /* we have a curve over a prime field */ | |
700 | /* extract the prime number */ | |
701 | if (!params->fieldID->p.prime) { | |
60b350a3 | 702 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
703 | goto err; |
704 | } | |
705 | p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL); | |
706 | if (p == NULL) { | |
60b350a3 | 707 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB); |
0f113f3e MC |
708 | goto err; |
709 | } | |
710 | ||
711 | if (BN_is_negative(p) || BN_is_zero(p)) { | |
60b350a3 | 712 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD); |
0f113f3e MC |
713 | goto err; |
714 | } | |
715 | ||
716 | field_bits = BN_num_bits(p); | |
717 | if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) { | |
60b350a3 | 718 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_FIELD_TOO_LARGE); |
0f113f3e MC |
719 | goto err; |
720 | } | |
721 | ||
722 | /* create the EC_GROUP structure */ | |
723 | ret = EC_GROUP_new_curve_GFp(p, a, b, NULL); | |
724 | } else { | |
60b350a3 | 725 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_FIELD); |
0f113f3e MC |
726 | goto err; |
727 | } | |
728 | ||
729 | if (ret == NULL) { | |
60b350a3 | 730 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
731 | goto err; |
732 | } | |
733 | ||
734 | /* extract seed (optional) */ | |
735 | if (params->curve->seed != NULL) { | |
b548a1f1 | 736 | OPENSSL_free(ret->seed); |
75ebbd9a | 737 | if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL) { |
60b350a3 | 738 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
739 | goto err; |
740 | } | |
741 | memcpy(ret->seed, params->curve->seed->data, | |
742 | params->curve->seed->length); | |
743 | ret->seed_len = params->curve->seed->length; | |
744 | } | |
745 | ||
746 | if (!params->order || !params->base || !params->base->data) { | |
60b350a3 | 747 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
748 | goto err; |
749 | } | |
750 | ||
751 | if ((point = EC_POINT_new(ret)) == NULL) | |
752 | goto err; | |
753 | ||
754 | /* set the point conversion form */ | |
755 | EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t) | |
756 | (params->base->data[0] & ~0x01)); | |
757 | ||
758 | /* extract the ec point */ | |
759 | if (!EC_POINT_oct2point(ret, point, params->base->data, | |
760 | params->base->length, NULL)) { | |
60b350a3 | 761 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
762 | goto err; |
763 | } | |
764 | ||
765 | /* extract the order */ | |
766 | if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) { | |
60b350a3 | 767 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB); |
0f113f3e MC |
768 | goto err; |
769 | } | |
770 | if (BN_is_negative(a) || BN_is_zero(a)) { | |
60b350a3 | 771 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER); |
0f113f3e MC |
772 | goto err; |
773 | } | |
774 | if (BN_num_bits(a) > (int)field_bits + 1) { /* Hasse bound */ | |
60b350a3 | 775 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_INVALID_GROUP_ORDER); |
0f113f3e MC |
776 | goto err; |
777 | } | |
778 | ||
779 | /* extract the cofactor (optional) */ | |
780 | if (params->cofactor == NULL) { | |
23a1d5e9 RS |
781 | BN_free(b); |
782 | b = NULL; | |
0f113f3e | 783 | } else if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) { |
60b350a3 | 784 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_ASN1_LIB); |
0f113f3e MC |
785 | goto err; |
786 | } | |
787 | /* set the generator, order and cofactor (if present) */ | |
788 | if (!EC_GROUP_set_generator(ret, point, a, b)) { | |
60b350a3 | 789 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
790 | goto err; |
791 | } | |
792 | ||
793 | ok = 1; | |
794 | ||
8fdc3734 RS |
795 | err: |
796 | if (!ok) { | |
797 | EC_GROUP_clear_free(ret); | |
0f113f3e MC |
798 | ret = NULL; |
799 | } | |
800 | ||
23a1d5e9 RS |
801 | BN_free(p); |
802 | BN_free(a); | |
803 | BN_free(b); | |
8fdc3734 | 804 | EC_POINT_free(point); |
26a7d938 | 805 | return ret; |
012c86ab BM |
806 | } |
807 | ||
60b350a3 | 808 | EC_GROUP *EC_GROUP_new_from_ecpkparameters(const ECPKPARAMETERS *params) |
0f113f3e MC |
809 | { |
810 | EC_GROUP *ret = NULL; | |
811 | int tmp = 0; | |
812 | ||
813 | if (params == NULL) { | |
60b350a3 | 814 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_MISSING_PARAMETERS); |
0f113f3e MC |
815 | return NULL; |
816 | } | |
817 | ||
818 | if (params->type == 0) { /* the curve is given by an OID */ | |
819 | tmp = OBJ_obj2nid(params->value.named_curve); | |
820 | if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) { | |
60b350a3 | 821 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, |
0f113f3e MC |
822 | EC_R_EC_GROUP_NEW_BY_NAME_FAILURE); |
823 | return NULL; | |
824 | } | |
825 | EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE); | |
826 | } else if (params->type == 1) { /* the parameters are given by a | |
827 | * ECPARAMETERS structure */ | |
60b350a3 | 828 | ret = EC_GROUP_new_from_ecparameters(params->value.parameters); |
0f113f3e | 829 | if (!ret) { |
60b350a3 | 830 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, ERR_R_EC_LIB); |
0f113f3e MC |
831 | return NULL; |
832 | } | |
e363534c | 833 | EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_EXPLICIT_CURVE); |
0f113f3e MC |
834 | } else if (params->type == 2) { /* implicitlyCA */ |
835 | return NULL; | |
836 | } else { | |
60b350a3 | 837 | ECerr(EC_F_EC_GROUP_NEW_FROM_ECPKPARAMETERS, EC_R_ASN1_ERROR); |
0f113f3e MC |
838 | return NULL; |
839 | } | |
840 | ||
841 | return ret; | |
842 | } | |
012c86ab | 843 | |
14a7cfb3 | 844 | /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */ |
012c86ab | 845 | |
6343829a | 846 | EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len) |
0f113f3e MC |
847 | { |
848 | EC_GROUP *group = NULL; | |
849 | ECPKPARAMETERS *params = NULL; | |
a46c9789 | 850 | const unsigned char *p = *in; |
0f113f3e | 851 | |
a46c9789 | 852 | if ((params = d2i_ECPKPARAMETERS(NULL, &p, len)) == NULL) { |
0f113f3e MC |
853 | ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE); |
854 | ECPKPARAMETERS_free(params); | |
855 | return NULL; | |
856 | } | |
857 | ||
60b350a3 | 858 | if ((group = EC_GROUP_new_from_ecpkparameters(params)) == NULL) { |
0f113f3e MC |
859 | ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE); |
860 | ECPKPARAMETERS_free(params); | |
861 | return NULL; | |
862 | } | |
863 | ||
8fdc3734 | 864 | if (a) { |
0f113f3e | 865 | EC_GROUP_clear_free(*a); |
0f113f3e | 866 | *a = group; |
8fdc3734 | 867 | } |
0f113f3e MC |
868 | |
869 | ECPKPARAMETERS_free(params); | |
a46c9789 | 870 | *in = p; |
26a7d938 | 871 | return group; |
0f113f3e | 872 | } |
012c86ab | 873 | |
14a7cfb3 | 874 | int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out) |
0f113f3e MC |
875 | { |
876 | int ret = 0; | |
60b350a3 | 877 | ECPKPARAMETERS *tmp = EC_GROUP_get_ecpkparameters(a, NULL); |
0f113f3e MC |
878 | if (tmp == NULL) { |
879 | ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE); | |
880 | return 0; | |
881 | } | |
882 | if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) { | |
883 | ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE); | |
884 | ECPKPARAMETERS_free(tmp); | |
885 | return 0; | |
886 | } | |
887 | ECPKPARAMETERS_free(tmp); | |
26a7d938 | 888 | return ret; |
0f113f3e | 889 | } |
012c86ab | 890 | |
14a7cfb3 BM |
891 | /* some EC_KEY functions */ |
892 | ||
6343829a | 893 | EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len) |
0f113f3e | 894 | { |
0f113f3e MC |
895 | EC_KEY *ret = NULL; |
896 | EC_PRIVATEKEY *priv_key = NULL; | |
a46c9789 | 897 | const unsigned char *p = *in; |
0f113f3e | 898 | |
a46c9789 | 899 | if ((priv_key = d2i_EC_PRIVATEKEY(NULL, &p, len)) == NULL) { |
0f113f3e | 900 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); |
0f113f3e MC |
901 | return NULL; |
902 | } | |
903 | ||
904 | if (a == NULL || *a == NULL) { | |
905 | if ((ret = EC_KEY_new()) == NULL) { | |
906 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
907 | goto err; | |
908 | } | |
0f113f3e MC |
909 | } else |
910 | ret = *a; | |
911 | ||
912 | if (priv_key->parameters) { | |
8fdc3734 | 913 | EC_GROUP_clear_free(ret->group); |
60b350a3 | 914 | ret->group = EC_GROUP_new_from_ecpkparameters(priv_key->parameters); |
0f113f3e MC |
915 | } |
916 | ||
917 | if (ret->group == NULL) { | |
918 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
919 | goto err; | |
920 | } | |
921 | ||
922 | ret->version = priv_key->version; | |
923 | ||
924 | if (priv_key->privateKey) { | |
d810700b | 925 | ASN1_OCTET_STRING *pkey = priv_key->privateKey; |
17ebf85a | 926 | if (EC_KEY_oct2priv(ret, ASN1_STRING_get0_data(pkey), |
d810700b | 927 | ASN1_STRING_length(pkey)) == 0) |
0f113f3e | 928 | goto err; |
0f113f3e MC |
929 | } else { |
930 | ECerr(EC_F_D2I_ECPRIVATEKEY, EC_R_MISSING_PRIVATE_KEY); | |
931 | goto err; | |
932 | } | |
933 | ||
8fdc3734 | 934 | EC_POINT_clear_free(ret->pub_key); |
0f113f3e MC |
935 | ret->pub_key = EC_POINT_new(ret->group); |
936 | if (ret->pub_key == NULL) { | |
937 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
938 | goto err; | |
939 | } | |
940 | ||
941 | if (priv_key->publicKey) { | |
942 | const unsigned char *pub_oct; | |
943 | int pub_oct_len; | |
944 | ||
17ebf85a | 945 | pub_oct = ASN1_STRING_get0_data(priv_key->publicKey); |
f422a514 | 946 | pub_oct_len = ASN1_STRING_length(priv_key->publicKey); |
6ea04154 | 947 | if (!EC_KEY_oct2key(ret, pub_oct, pub_oct_len, NULL)) { |
0f113f3e MC |
948 | ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); |
949 | goto err; | |
950 | } | |
951 | } else { | |
77470e98 DSH |
952 | if (ret->group->meth->keygenpub == NULL |
953 | || ret->group->meth->keygenpub(ret) == 0) | |
6903e2e7 | 954 | goto err; |
0f113f3e MC |
955 | /* Remember the original private-key-only encoding. */ |
956 | ret->enc_flag |= EC_PKEY_NO_PUBKEY; | |
957 | } | |
958 | ||
9e442d48 MC |
959 | if (a) |
960 | *a = ret; | |
25aaa98a | 961 | EC_PRIVATEKEY_free(priv_key); |
a46c9789 | 962 | *in = p; |
26a7d938 | 963 | return ret; |
25aaa98a RS |
964 | |
965 | err: | |
966 | if (a == NULL || *a != ret) | |
967 | EC_KEY_free(ret); | |
968 | EC_PRIVATEKEY_free(priv_key); | |
969 | return NULL; | |
0f113f3e MC |
970 | } |
971 | ||
9fdcc21f | 972 | int i2d_ECPrivateKey(const EC_KEY *a, unsigned char **out) |
0f113f3e MC |
973 | { |
974 | int ret = 0, ok = 0; | |
7fc7d1a7 | 975 | unsigned char *priv= NULL, *pub= NULL; |
8a41fa6f | 976 | size_t privlen = 0, publen = 0; |
7fc7d1a7 | 977 | |
0f113f3e MC |
978 | EC_PRIVATEKEY *priv_key = NULL; |
979 | ||
d810700b | 980 | if (a == NULL || a->group == NULL || |
0f113f3e MC |
981 | (!(a->enc_flag & EC_PKEY_NO_PUBKEY) && a->pub_key == NULL)) { |
982 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_PASSED_NULL_PARAMETER); | |
983 | goto err; | |
984 | } | |
985 | ||
986 | if ((priv_key = EC_PRIVATEKEY_new()) == NULL) { | |
987 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
988 | goto err; | |
989 | } | |
990 | ||
991 | priv_key->version = a->version; | |
992 | ||
7fc7d1a7 | 993 | privlen = EC_KEY_priv2buf(a, &priv); |
30cd4ff2 | 994 | |
7fc7d1a7 | 995 | if (privlen == 0) { |
d810700b | 996 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); |
30cd4ff2 DE |
997 | goto err; |
998 | } | |
999 | ||
7fc7d1a7 DSH |
1000 | ASN1_STRING_set0(priv_key->privateKey, priv, privlen); |
1001 | priv = NULL; | |
0f113f3e MC |
1002 | |
1003 | if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) { | |
1004 | if ((priv_key->parameters = | |
60b350a3 | 1005 | EC_GROUP_get_ecpkparameters(a->group, |
0f113f3e MC |
1006 | priv_key->parameters)) == NULL) { |
1007 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1008 | goto err; | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) { | |
f422a514 | 1013 | priv_key->publicKey = ASN1_BIT_STRING_new(); |
0f113f3e MC |
1014 | if (priv_key->publicKey == NULL) { |
1015 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
1016 | goto err; | |
1017 | } | |
1018 | ||
7fc7d1a7 | 1019 | publen = EC_KEY_key2buf(a, a->conv_form, &pub, NULL); |
0f113f3e | 1020 | |
7fc7d1a7 | 1021 | if (publen == 0) { |
0f113f3e MC |
1022 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); |
1023 | goto err; | |
1024 | } | |
1025 | ||
1026 | priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
1027 | priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
7fc7d1a7 DSH |
1028 | ASN1_STRING_set0(priv_key->publicKey, pub, publen); |
1029 | pub = NULL; | |
0f113f3e MC |
1030 | } |
1031 | ||
1032 | if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) { | |
1033 | ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
1034 | goto err; | |
1035 | } | |
1036 | ok = 1; | |
1037 | err: | |
7fc7d1a7 DSH |
1038 | OPENSSL_clear_free(priv, privlen); |
1039 | OPENSSL_free(pub); | |
25aaa98a | 1040 | EC_PRIVATEKEY_free(priv_key); |
0f113f3e MC |
1041 | return (ok ? ret : 0); |
1042 | } | |
14a7cfb3 | 1043 | |
9fdcc21f | 1044 | int i2d_ECParameters(const EC_KEY *a, unsigned char **out) |
0f113f3e MC |
1045 | { |
1046 | if (a == NULL) { | |
1047 | ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
1048 | return 0; | |
1049 | } | |
1050 | return i2d_ECPKParameters(a->group, out); | |
1051 | } | |
14a7cfb3 BM |
1052 | |
1053 | EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len) | |
0f113f3e MC |
1054 | { |
1055 | EC_KEY *ret; | |
1056 | ||
1057 | if (in == NULL || *in == NULL) { | |
1058 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
1059 | return NULL; | |
1060 | } | |
1061 | ||
1062 | if (a == NULL || *a == NULL) { | |
1063 | if ((ret = EC_KEY_new()) == NULL) { | |
1064 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE); | |
1065 | return NULL; | |
1066 | } | |
0f113f3e MC |
1067 | } else |
1068 | ret = *a; | |
1069 | ||
1070 | if (!d2i_ECPKParameters(&ret->group, in, len)) { | |
1071 | ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB); | |
5e5d53d3 MC |
1072 | if (a == NULL || *a != ret) |
1073 | EC_KEY_free(ret); | |
0f113f3e MC |
1074 | return NULL; |
1075 | } | |
1076 | ||
5e5d53d3 MC |
1077 | if (a) |
1078 | *a = ret; | |
1079 | ||
0f113f3e MC |
1080 | return ret; |
1081 | } | |
14a7cfb3 | 1082 | |
62e3163b | 1083 | EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len) |
0f113f3e MC |
1084 | { |
1085 | EC_KEY *ret = NULL; | |
1086 | ||
1087 | if (a == NULL || (*a) == NULL || (*a)->group == NULL) { | |
1088 | /* | |
0d4fb843 | 1089 | * sorry, but a EC_GROUP-structure is necessary to set the public key |
0f113f3e MC |
1090 | */ |
1091 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1092 | return 0; | |
1093 | } | |
1094 | ret = *a; | |
6ea04154 | 1095 | if (!EC_KEY_oct2key(ret, *in, len, NULL)) { |
0f113f3e MC |
1096 | ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB); |
1097 | return 0; | |
1098 | } | |
0f113f3e MC |
1099 | *in += len; |
1100 | return ret; | |
1101 | } | |
14a7cfb3 | 1102 | |
60c25873 | 1103 | int i2o_ECPublicKey(const EC_KEY *a, unsigned char **out) |
0f113f3e MC |
1104 | { |
1105 | size_t buf_len = 0; | |
1106 | int new_buffer = 0; | |
1107 | ||
1108 | if (a == NULL) { | |
1109 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | buf_len = EC_POINT_point2oct(a->group, a->pub_key, | |
1114 | a->conv_form, NULL, 0, NULL); | |
1115 | ||
1116 | if (out == NULL || buf_len == 0) | |
1117 | /* out == NULL => just return the length of the octet string */ | |
1118 | return buf_len; | |
1119 | ||
1120 | if (*out == NULL) { | |
1121 | if ((*out = OPENSSL_malloc(buf_len)) == NULL) { | |
1122 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); | |
1123 | return 0; | |
1124 | } | |
1125 | new_buffer = 1; | |
1126 | } | |
1127 | if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form, | |
1128 | *out, buf_len, NULL)) { | |
1129 | ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB); | |
1130 | if (new_buffer) { | |
1131 | OPENSSL_free(*out); | |
1132 | *out = NULL; | |
1133 | } | |
1134 | return 0; | |
1135 | } | |
1136 | if (!new_buffer) | |
1137 | *out += buf_len; | |
1138 | return buf_len; | |
1139 | } | |
2d3d00dc | 1140 | |
9fdcc21f DO |
1141 | DECLARE_ASN1_FUNCTIONS(ECDSA_SIG) |
1142 | DECLARE_ASN1_ENCODE_FUNCTIONS_name(ECDSA_SIG, ECDSA_SIG) | |
8cc44d97 DSH |
1143 | |
1144 | ECDSA_SIG *ECDSA_SIG_new(void) | |
1145 | { | |
1146 | ECDSA_SIG *sig = OPENSSL_zalloc(sizeof(*sig)); | |
1147 | if (sig == NULL) | |
1148 | ECerr(EC_F_ECDSA_SIG_NEW, ERR_R_MALLOC_FAILURE); | |
1149 | return sig; | |
1150 | } | |
1151 | ||
1152 | void ECDSA_SIG_free(ECDSA_SIG *sig) | |
1153 | { | |
1154 | if (sig == NULL) | |
1155 | return; | |
1156 | BN_clear_free(sig->r); | |
1157 | BN_clear_free(sig->s); | |
1158 | OPENSSL_free(sig); | |
1159 | } | |
7236e3c8 | 1160 | |
54846b7c DM |
1161 | ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **psig, const unsigned char **ppin, long len) |
1162 | { | |
1163 | ECDSA_SIG *sig; | |
1164 | ||
1165 | if (len < 0) | |
1166 | return NULL; | |
1167 | if (psig != NULL && *psig != NULL) { | |
1168 | sig = *psig; | |
1169 | } else { | |
1170 | sig = ECDSA_SIG_new(); | |
1171 | if (sig == NULL) | |
1172 | return NULL; | |
1173 | } | |
1174 | if (sig->r == NULL) | |
1175 | sig->r = BN_new(); | |
1176 | if (sig->s == NULL) | |
1177 | sig->s = BN_new(); | |
1178 | if (decode_der_dsa_sig(sig->r, sig->s, ppin, (size_t)len) == 0) { | |
1179 | if (psig == NULL || *psig == NULL) | |
1180 | ECDSA_SIG_free(sig); | |
1181 | return NULL; | |
1182 | } | |
1183 | if (psig != NULL && *psig == NULL) | |
1184 | *psig = sig; | |
1185 | return sig; | |
1186 | } | |
1187 | ||
1188 | int i2d_ECDSA_SIG(const ECDSA_SIG *sig, unsigned char **ppout) | |
1189 | { | |
b8805834 | 1190 | BUF_MEM *buf = NULL; |
54846b7c | 1191 | size_t encoded_len; |
b8805834 | 1192 | WPACKET pkt; |
54846b7c | 1193 | |
b8805834 MC |
1194 | if (ppout == NULL) { |
1195 | if (!WPACKET_init_null(&pkt, 0)) | |
54846b7c | 1196 | return -1; |
b8805834 MC |
1197 | } else if (*ppout == NULL) { |
1198 | if ((buf = BUF_MEM_new()) == NULL | |
1199 | || !WPACKET_init_len(&pkt, buf, 0)) { | |
1200 | BUF_MEM_free(buf); | |
54846b7c | 1201 | return -1; |
b8805834 | 1202 | } |
54846b7c | 1203 | } else { |
b8805834 MC |
1204 | if (!WPACKET_init_static_len(&pkt, *ppout, SIZE_MAX, 0)) |
1205 | return -1; | |
54846b7c | 1206 | } |
b8805834 MC |
1207 | |
1208 | if (!encode_der_dsa_sig(&pkt, sig->r, sig->s) | |
1209 | || !WPACKET_get_total_written(&pkt, &encoded_len) | |
1210 | || !WPACKET_finish(&pkt)) { | |
1211 | BUF_MEM_free(buf); | |
1212 | WPACKET_cleanup(&pkt); | |
54846b7c DM |
1213 | return -1; |
1214 | } | |
b8805834 MC |
1215 | |
1216 | if (ppout != NULL) { | |
1217 | if (*ppout == NULL) { | |
1218 | *ppout = (unsigned char *)buf->data; | |
1219 | buf->data = NULL; | |
1220 | BUF_MEM_free(buf); | |
1221 | } else { | |
1222 | *ppout += encoded_len; | |
1223 | } | |
1224 | } | |
1225 | ||
54846b7c DM |
1226 | return (int)encoded_len; |
1227 | } | |
1228 | ||
9267c11b | 1229 | void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps) |
7236e3c8 | 1230 | { |
91e7bcc2 | 1231 | if (pr != NULL) |
7236e3c8 | 1232 | *pr = sig->r; |
91e7bcc2 | 1233 | if (ps != NULL) |
7236e3c8 DSH |
1234 | *ps = sig->s; |
1235 | } | |
cf517a6d | 1236 | |
0396401d DMSP |
1237 | const BIGNUM *ECDSA_SIG_get0_r(const ECDSA_SIG *sig) |
1238 | { | |
1239 | return sig->r; | |
1240 | } | |
1241 | ||
1242 | const BIGNUM *ECDSA_SIG_get0_s(const ECDSA_SIG *sig) | |
1243 | { | |
1244 | return sig->s; | |
1245 | } | |
1246 | ||
7ca3ea22 | 1247 | int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s) |
6a571a18 | 1248 | { |
bbaa9dd8 TS |
1249 | if (r == NULL || s == NULL) |
1250 | return 0; | |
6a571a18 TS |
1251 | BN_clear_free(sig->r); |
1252 | BN_clear_free(sig->s); | |
1253 | sig->r = r; | |
1254 | sig->s = s; | |
1255 | return 1; | |
1256 | } | |
1257 | ||
cf517a6d DSH |
1258 | int ECDSA_size(const EC_KEY *r) |
1259 | { | |
1260 | int ret, i; | |
1261 | ASN1_INTEGER bs; | |
cf517a6d DSH |
1262 | unsigned char buf[4]; |
1263 | const EC_GROUP *group; | |
1264 | ||
1265 | if (r == NULL) | |
1266 | return 0; | |
1267 | group = EC_KEY_get0_group(r); | |
1268 | if (group == NULL) | |
1269 | return 0; | |
1270 | ||
be2e334f DSH |
1271 | i = EC_GROUP_order_bits(group); |
1272 | if (i == 0) | |
cf517a6d | 1273 | return 0; |
cf517a6d DSH |
1274 | bs.length = (i + 7) / 8; |
1275 | bs.data = buf; | |
1276 | bs.type = V_ASN1_INTEGER; | |
1277 | /* If the top bit is set the asn1 encoding is 1 larger. */ | |
1278 | buf[0] = 0xff; | |
1279 | ||
1280 | i = i2d_ASN1_INTEGER(&bs, NULL); | |
1281 | i += i; /* r and s */ | |
1282 | ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE); | |
26a7d938 | 1283 | return ret; |
cf517a6d | 1284 | } |