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| 1 /* crypto/ec/ec_asn1.c */ | |
| 2 /* | |
| 3 * Written by Nils Larsch for the OpenSSL project. | |
| 4 */ | |
| 5 /* ==================================================================== | |
| 6 * Copyright (c) 2000-2003 The OpenSSL Project. All rights reserved. | |
| 7 * | |
| 8 * Redistribution and use in source and binary forms, with or without | |
| 9 * modification, are permitted provided that the following conditions | |
| 10 * are met: | |
| 11 * | |
| 12 * 1. Redistributions of source code must retain the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer. | |
| 14 * | |
| 15 * 2. Redistributions in binary form must reproduce the above copyright | |
| 16 * notice, this list of conditions and the following disclaimer in | |
| 17 * the documentation and/or other materials provided with the | |
| 18 * distribution. | |
| 19 * | |
| 20 * 3. All advertising materials mentioning features or use of this | |
| 21 * software must display the following acknowledgment: | |
| 22 * "This product includes software developed by the OpenSSL Project | |
| 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
| 24 * | |
| 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
| 26 * endorse or promote products derived from this software without | |
| 27 * prior written permission. For written permission, please contact | |
| 28 * licensing@OpenSSL.org. | |
| 29 * | |
| 30 * 5. Products derived from this software may not be called "OpenSSL" | |
| 31 * nor may "OpenSSL" appear in their names without prior written | |
| 32 * permission of the OpenSSL Project. | |
| 33 * | |
| 34 * 6. Redistributions of any form whatsoever must retain the following | |
| 35 * acknowledgment: | |
| 36 * "This product includes software developed by the OpenSSL Project | |
| 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
| 38 * | |
| 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
| 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
| 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 50 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 51 * ==================================================================== | |
| 52 * | |
| 53 * This product includes cryptographic software written by Eric Young | |
| 54 * (eay@cryptsoft.com). This product includes software written by Tim | |
| 55 * Hudson (tjh@cryptsoft.com). | |
| 56 * | |
| 57 */ | |
| 58 | |
| 59 #include <string.h> | |
| 60 #include "ec_lcl.h" | |
| 61 #include <openssl/err.h> | |
| 62 #include <openssl/asn1t.h> | |
| 63 #include <openssl/objects.h> | |
| 64 | |
| 65 | |
| 66 int EC_GROUP_get_basis_type(const EC_GROUP *group) | |
| 67 { | |
| 68 int i=0; | |
| 69 | |
| 70 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != | |
| 71 NID_X9_62_characteristic_two_field) | |
| 72 /* everything else is currently not supported */ | |
| 73 return 0; | |
| 74 | |
| 75 while (group->poly[i] != 0) | |
| 76 i++; | |
| 77 | |
| 78 if (i == 4) | |
| 79 return NID_X9_62_ppBasis; | |
| 80 else if (i == 2) | |
| 81 return NID_X9_62_tpBasis; | |
| 82 else | |
| 83 /* everything else is currently not supported */ | |
| 84 return 0; | |
| 85 } | |
| 86 #ifndef OPENSSL_NO_EC2M | |
| 87 int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k) | |
| 88 { | |
| 89 if (group == NULL) | |
| 90 return 0; | |
| 91 | |
| 92 if (EC_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_s
et_curve | |
| 93 || !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[
2] == 0))) | |
| 94 { | |
| 95 ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE_B
EEN_CALLED); | |
| 96 return 0; | |
| 97 } | |
| 98 | |
| 99 if (k) | |
| 100 *k = group->poly[1]; | |
| 101 | |
| 102 return 1; | |
| 103 } | |
| 104 int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1, | |
| 105 unsigned int *k2, unsigned int *k3) | |
| 106 { | |
| 107 if (group == NULL) | |
| 108 return 0; | |
| 109 | |
| 110 if (EC_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_s
et_curve | |
| 111 || !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[
2] != 0) && (group->poly[3] != 0) && (group->poly[4] == 0))) | |
| 112 { | |
| 113 ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE
_BEEN_CALLED); | |
| 114 return 0; | |
| 115 } | |
| 116 | |
| 117 if (k1) | |
| 118 *k1 = group->poly[3]; | |
| 119 if (k2) | |
| 120 *k2 = group->poly[2]; | |
| 121 if (k3) | |
| 122 *k3 = group->poly[1]; | |
| 123 | |
| 124 return 1; | |
| 125 } | |
| 126 #endif | |
| 127 | |
| 128 | |
| 129 /* some structures needed for the asn1 encoding */ | |
| 130 typedef struct x9_62_pentanomial_st { | |
| 131 long k1; | |
| 132 long k2; | |
| 133 long k3; | |
| 134 } X9_62_PENTANOMIAL; | |
| 135 | |
| 136 typedef struct x9_62_characteristic_two_st { | |
| 137 long m; | |
| 138 ASN1_OBJECT *type; | |
| 139 union { | |
| 140 char *ptr; | |
| 141 /* NID_X9_62_onBasis */ | |
| 142 ASN1_NULL *onBasis; | |
| 143 /* NID_X9_62_tpBasis */ | |
| 144 ASN1_INTEGER *tpBasis; | |
| 145 /* NID_X9_62_ppBasis */ | |
| 146 X9_62_PENTANOMIAL *ppBasis; | |
| 147 /* anything else */ | |
| 148 ASN1_TYPE *other; | |
| 149 } p; | |
| 150 } X9_62_CHARACTERISTIC_TWO; | |
| 151 | |
| 152 typedef struct x9_62_fieldid_st { | |
| 153 ASN1_OBJECT *fieldType; | |
| 154 union { | |
| 155 char *ptr; | |
| 156 /* NID_X9_62_prime_field */ | |
| 157 ASN1_INTEGER *prime; | |
| 158 /* NID_X9_62_characteristic_two_field */ | |
| 159 X9_62_CHARACTERISTIC_TWO *char_two; | |
| 160 /* anything else */ | |
| 161 ASN1_TYPE *other; | |
| 162 } p; | |
| 163 } X9_62_FIELDID; | |
| 164 | |
| 165 typedef struct x9_62_curve_st { | |
| 166 ASN1_OCTET_STRING *a; | |
| 167 ASN1_OCTET_STRING *b; | |
| 168 ASN1_BIT_STRING *seed; | |
| 169 } X9_62_CURVE; | |
| 170 | |
| 171 typedef struct ec_parameters_st { | |
| 172 long version; | |
| 173 X9_62_FIELDID *fieldID; | |
| 174 X9_62_CURVE *curve; | |
| 175 ASN1_OCTET_STRING *base; | |
| 176 ASN1_INTEGER *order; | |
| 177 ASN1_INTEGER *cofactor; | |
| 178 } ECPARAMETERS; | |
| 179 | |
| 180 struct ecpk_parameters_st { | |
| 181 int type; | |
| 182 union { | |
| 183 ASN1_OBJECT *named_curve; | |
| 184 ECPARAMETERS *parameters; | |
| 185 ASN1_NULL *implicitlyCA; | |
| 186 } value; | |
| 187 }/* ECPKPARAMETERS */; | |
| 188 | |
| 189 /* SEC1 ECPrivateKey */ | |
| 190 typedef struct ec_privatekey_st { | |
| 191 long version; | |
| 192 ASN1_OCTET_STRING *privateKey; | |
| 193 ECPKPARAMETERS *parameters; | |
| 194 ASN1_BIT_STRING *publicKey; | |
| 195 } EC_PRIVATEKEY; | |
| 196 | |
| 197 /* the OpenSSL ASN.1 definitions */ | |
| 198 ASN1_SEQUENCE(X9_62_PENTANOMIAL) = { | |
| 199 ASN1_SIMPLE(X9_62_PENTANOMIAL, k1, LONG), | |
| 200 ASN1_SIMPLE(X9_62_PENTANOMIAL, k2, LONG), | |
| 201 ASN1_SIMPLE(X9_62_PENTANOMIAL, k3, LONG) | |
| 202 } ASN1_SEQUENCE_END(X9_62_PENTANOMIAL) | |
| 203 | |
| 204 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL) | |
| 205 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_PENTANOMIAL) | |
| 206 | |
| 207 ASN1_ADB_TEMPLATE(char_two_def) = ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.other,
ASN1_ANY); | |
| 208 | |
| 209 ASN1_ADB(X9_62_CHARACTERISTIC_TWO) = { | |
| 210 ADB_ENTRY(NID_X9_62_onBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.onB
asis, ASN1_NULL)), | |
| 211 ADB_ENTRY(NID_X9_62_tpBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.tpB
asis, ASN1_INTEGER)), | |
| 212 ADB_ENTRY(NID_X9_62_ppBasis, ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, p.ppB
asis, X9_62_PENTANOMIAL)) | |
| 213 } ASN1_ADB_END(X9_62_CHARACTERISTIC_TWO, 0, type, 0, &char_two_def_tt, NULL); | |
| 214 | |
| 215 ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = { | |
| 216 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, LONG), | |
| 217 ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, type, ASN1_OBJECT), | |
| 218 ASN1_ADB_OBJECT(X9_62_CHARACTERISTIC_TWO) | |
| 219 } ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO) | |
| 220 | |
| 221 DECLARE_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO) | |
| 222 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(X9_62_CHARACTERISTIC_TWO) | |
| 223 | |
| 224 ASN1_ADB_TEMPLATE(fieldID_def) = ASN1_SIMPLE(X9_62_FIELDID, p.other, ASN1_ANY); | |
| 225 | |
| 226 ASN1_ADB(X9_62_FIELDID) = { | |
| 227 ADB_ENTRY(NID_X9_62_prime_field, ASN1_SIMPLE(X9_62_FIELDID, p.prime, ASN
1_INTEGER)), | |
| 228 ADB_ENTRY(NID_X9_62_characteristic_two_field, ASN1_SIMPLE(X9_62_FIELDID,
p.char_two, X9_62_CHARACTERISTIC_TWO)) | |
| 229 } ASN1_ADB_END(X9_62_FIELDID, 0, fieldType, 0, &fieldID_def_tt, NULL); | |
| 230 | |
| 231 ASN1_SEQUENCE(X9_62_FIELDID) = { | |
| 232 ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT), | |
| 233 ASN1_ADB_OBJECT(X9_62_FIELDID) | |
| 234 } ASN1_SEQUENCE_END(X9_62_FIELDID) | |
| 235 | |
| 236 ASN1_SEQUENCE(X9_62_CURVE) = { | |
| 237 ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING), | |
| 238 ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING), | |
| 239 ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING) | |
| 240 } ASN1_SEQUENCE_END(X9_62_CURVE) | |
| 241 | |
| 242 ASN1_SEQUENCE(ECPARAMETERS) = { | |
| 243 ASN1_SIMPLE(ECPARAMETERS, version, LONG), | |
| 244 ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID), | |
| 245 ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE), | |
| 246 ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING), | |
| 247 ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER), | |
| 248 ASN1_OPT(ECPARAMETERS, cofactor, ASN1_INTEGER) | |
| 249 } ASN1_SEQUENCE_END(ECPARAMETERS) | |
| 250 | |
| 251 DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) | |
| 252 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS) | |
| 253 | |
| 254 ASN1_CHOICE(ECPKPARAMETERS) = { | |
| 255 ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT), | |
| 256 ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS), | |
| 257 ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL) | |
| 258 } ASN1_CHOICE_END(ECPKPARAMETERS) | |
| 259 | |
| 260 DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS) | |
| 261 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECPKPARAMETERS, ECPKPARAMETERS) | |
| 262 IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS) | |
| 263 | |
| 264 ASN1_SEQUENCE(EC_PRIVATEKEY) = { | |
| 265 ASN1_SIMPLE(EC_PRIVATEKEY, version, LONG), | |
| 266 ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING), | |
| 267 ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0), | |
| 268 ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1) | |
| 269 } ASN1_SEQUENCE_END(EC_PRIVATEKEY) | |
| 270 | |
| 271 DECLARE_ASN1_FUNCTIONS_const(EC_PRIVATEKEY) | |
| 272 DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PRIVATEKEY, EC_PRIVATEKEY) | |
| 273 IMPLEMENT_ASN1_FUNCTIONS_const(EC_PRIVATEKEY) | |
| 274 | |
| 275 /* some declarations of internal function */ | |
| 276 | |
| 277 /* ec_asn1_group2field() sets the values in a X9_62_FIELDID object */ | |
| 278 static int ec_asn1_group2fieldid(const EC_GROUP *, X9_62_FIELDID *); | |
| 279 /* ec_asn1_group2curve() sets the values in a X9_62_CURVE object */ | |
| 280 static int ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *); | |
| 281 /* ec_asn1_parameters2group() creates a EC_GROUP object from a | |
| 282 * ECPARAMETERS object */ | |
| 283 static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *); | |
| 284 /* ec_asn1_group2parameters() creates a ECPARAMETERS object from a | |
| 285 * EC_GROUP object */ | |
| 286 static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *,ECPARAMETERS *); | |
| 287 /* ec_asn1_pkparameters2group() creates a EC_GROUP object from a | |
| 288 * ECPKPARAMETERS object */ | |
| 289 static EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *); | |
| 290 /* ec_asn1_group2pkparameters() creates a ECPKPARAMETERS object from a | |
| 291 * EC_GROUP object */ | |
| 292 static ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *, | |
| 293 ECPKPARAMETERS *); | |
| 294 | |
| 295 | |
| 296 /* the function definitions */ | |
| 297 | |
| 298 static int ec_asn1_group2fieldid(const EC_GROUP *group, X9_62_FIELDID *field) | |
| 299 { | |
| 300 int ok=0, nid; | |
| 301 BIGNUM *tmp = NULL; | |
| 302 | |
| 303 if (group == NULL || field == NULL) | |
| 304 return 0; | |
| 305 | |
| 306 /* clear the old values (if necessary) */ | |
| 307 if (field->fieldType != NULL) | |
| 308 ASN1_OBJECT_free(field->fieldType); | |
| 309 if (field->p.other != NULL) | |
| 310 ASN1_TYPE_free(field->p.other); | |
| 311 | |
| 312 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group)); | |
| 313 /* set OID for the field */ | |
| 314 if ((field->fieldType = OBJ_nid2obj(nid)) == NULL) | |
| 315 { | |
| 316 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
| 317 goto err; | |
| 318 } | |
| 319 | |
| 320 if (nid == NID_X9_62_prime_field) | |
| 321 { | |
| 322 if ((tmp = BN_new()) == NULL) | |
| 323 { | |
| 324 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
| 325 goto err; | |
| 326 } | |
| 327 /* the parameters are specified by the prime number p */ | |
| 328 if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL)) | |
| 329 { | |
| 330 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); | |
| 331 goto err; | |
| 332 } | |
| 333 /* set the prime number */ | |
| 334 field->p.prime = BN_to_ASN1_INTEGER(tmp,NULL); | |
| 335 if (field->p.prime == NULL) | |
| 336 { | |
| 337 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB); | |
| 338 goto err; | |
| 339 } | |
| 340 } | |
| 341 else /* nid == NID_X9_62_characteristic_two_field */ | |
| 342 #ifdef OPENSSL_NO_EC2M | |
| 343 { | |
| 344 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, EC_R_GF2M_NOT_SUPPORTED); | |
| 345 goto err; | |
| 346 } | |
| 347 #else | |
| 348 { | |
| 349 int field_type; | |
| 350 X9_62_CHARACTERISTIC_TWO *char_two; | |
| 351 | |
| 352 field->p.char_two = X9_62_CHARACTERISTIC_TWO_new(); | |
| 353 char_two = field->p.char_two; | |
| 354 | |
| 355 if (char_two == NULL) | |
| 356 { | |
| 357 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE); | |
| 358 goto err; | |
| 359 } | |
| 360 | |
| 361 char_two->m = (long)EC_GROUP_get_degree(group); | |
| 362 | |
| 363 field_type = EC_GROUP_get_basis_type(group); | |
| 364 | |
| 365 if (field_type == 0) | |
| 366 { | |
| 367 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB); | |
| 368 goto err; | |
| 369 } | |
| 370 /* set base type OID */ | |
| 371 if ((char_two->type = OBJ_nid2obj(field_type)) == NULL) | |
| 372 { | |
| 373 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB); | |
| 374 goto err; | |
| 375 } | |
| 376 | |
| 377 if (field_type == NID_X9_62_tpBasis) | |
| 378 { | |
| 379 unsigned int k; | |
| 380 | |
| 381 if (!EC_GROUP_get_trinomial_basis(group, &k)) | |
| 382 goto err; | |
| 383 | |
| 384 char_two->p.tpBasis = ASN1_INTEGER_new(); | |
| 385 if (!char_two->p.tpBasis) | |
| 386 { | |
| 387 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_F
AILURE); | |
| 388 goto err; | |
| 389 } | |
| 390 if (!ASN1_INTEGER_set(char_two->p.tpBasis, (long)k)) | |
| 391 { | |
| 392 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, | |
| 393 ERR_R_ASN1_LIB); | |
| 394 goto err; | |
| 395 } | |
| 396 } | |
| 397 else if (field_type == NID_X9_62_ppBasis) | |
| 398 { | |
| 399 unsigned int k1, k2, k3; | |
| 400 | |
| 401 if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3
)) | |
| 402 goto err; | |
| 403 | |
| 404 char_two->p.ppBasis = X9_62_PENTANOMIAL_new(); | |
| 405 if (!char_two->p.ppBasis) | |
| 406 { | |
| 407 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_F
AILURE); | |
| 408 goto err; | |
| 409 } | |
| 410 | |
| 411 /* set k? values */ | |
| 412 char_two->p.ppBasis->k1 = (long)k1; | |
| 413 char_two->p.ppBasis->k2 = (long)k2; | |
| 414 char_two->p.ppBasis->k3 = (long)k3; | |
| 415 } | |
| 416 else /* field_type == NID_X9_62_onBasis */ | |
| 417 { | |
| 418 /* for ONB the parameters are (asn1) NULL */ | |
| 419 char_two->p.onBasis = ASN1_NULL_new(); | |
| 420 if (!char_two->p.onBasis) | |
| 421 { | |
| 422 ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_F
AILURE); | |
| 423 goto err; | |
| 424 } | |
| 425 } | |
| 426 } | |
| 427 #endif | |
| 428 | |
| 429 ok = 1; | |
| 430 | |
| 431 err : if (tmp) | |
| 432 BN_free(tmp); | |
| 433 return(ok); | |
| 434 } | |
| 435 | |
| 436 static int ec_asn1_group2curve(const EC_GROUP *group, X9_62_CURVE *curve) | |
| 437 { | |
| 438 int ok=0, nid; | |
| 439 BIGNUM *tmp_1=NULL, *tmp_2=NULL; | |
| 440 unsigned char *buffer_1=NULL, *buffer_2=NULL, | |
| 441 *a_buf=NULL, *b_buf=NULL; | |
| 442 size_t len_1, len_2; | |
| 443 unsigned char char_zero = 0; | |
| 444 | |
| 445 if (!group || !curve || !curve->a || !curve->b) | |
| 446 return 0; | |
| 447 | |
| 448 if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL) | |
| 449 { | |
| 450 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE); | |
| 451 goto err; | |
| 452 } | |
| 453 | |
| 454 nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group)); | |
| 455 | |
| 456 /* get a and b */ | |
| 457 if (nid == NID_X9_62_prime_field) | |
| 458 { | |
| 459 if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL)) | |
| 460 { | |
| 461 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB); | |
| 462 goto err; | |
| 463 } | |
| 464 } | |
| 465 #ifndef OPENSSL_NO_EC2M | |
| 466 else /* nid == NID_X9_62_characteristic_two_field */ | |
| 467 { | |
| 468 if (!EC_GROUP_get_curve_GF2m(group, NULL, tmp_1, tmp_2, NULL)) | |
| 469 { | |
| 470 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB); | |
| 471 goto err; | |
| 472 } | |
| 473 } | |
| 474 #endif | |
| 475 len_1 = (size_t)BN_num_bytes(tmp_1); | |
| 476 len_2 = (size_t)BN_num_bytes(tmp_2); | |
| 477 | |
| 478 if (len_1 == 0) | |
| 479 { | |
| 480 /* len_1 == 0 => a == 0 */ | |
| 481 a_buf = &char_zero; | |
| 482 len_1 = 1; | |
| 483 } | |
| 484 else | |
| 485 { | |
| 486 if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL) | |
| 487 { | |
| 488 ECerr(EC_F_EC_ASN1_GROUP2CURVE, | |
| 489 ERR_R_MALLOC_FAILURE); | |
| 490 goto err; | |
| 491 } | |
| 492 if ( (len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0) | |
| 493 { | |
| 494 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB); | |
| 495 goto err; | |
| 496 } | |
| 497 a_buf = buffer_1; | |
| 498 } | |
| 499 | |
| 500 if (len_2 == 0) | |
| 501 { | |
| 502 /* len_2 == 0 => b == 0 */ | |
| 503 b_buf = &char_zero; | |
| 504 len_2 = 1; | |
| 505 } | |
| 506 else | |
| 507 { | |
| 508 if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL) | |
| 509 { | |
| 510 ECerr(EC_F_EC_ASN1_GROUP2CURVE, | |
| 511 ERR_R_MALLOC_FAILURE); | |
| 512 goto err; | |
| 513 } | |
| 514 if ( (len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0) | |
| 515 { | |
| 516 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB); | |
| 517 goto err; | |
| 518 } | |
| 519 b_buf = buffer_2; | |
| 520 } | |
| 521 | |
| 522 /* set a and b */ | |
| 523 if (!M_ASN1_OCTET_STRING_set(curve->a, a_buf, len_1) || | |
| 524 !M_ASN1_OCTET_STRING_set(curve->b, b_buf, len_2)) | |
| 525 { | |
| 526 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); | |
| 527 goto err; | |
| 528 } | |
| 529 | |
| 530 /* set the seed (optional) */ | |
| 531 if (group->seed) | |
| 532 { | |
| 533 if (!curve->seed) | |
| 534 if ((curve->seed = ASN1_BIT_STRING_new()) == NULL) | |
| 535 { | |
| 536 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAI
LURE); | |
| 537 goto err; | |
| 538 } | |
| 539 curve->seed->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); | |
| 540 curve->seed->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
| 541 if (!ASN1_BIT_STRING_set(curve->seed, group->seed, | |
| 542 (int)group->seed_len)) | |
| 543 { | |
| 544 ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB); | |
| 545 goto err; | |
| 546 } | |
| 547 } | |
| 548 else | |
| 549 { | |
| 550 if (curve->seed) | |
| 551 { | |
| 552 ASN1_BIT_STRING_free(curve->seed); | |
| 553 curve->seed = NULL; | |
| 554 } | |
| 555 } | |
| 556 | |
| 557 ok = 1; | |
| 558 | |
| 559 err: if (buffer_1) | |
| 560 OPENSSL_free(buffer_1); | |
| 561 if (buffer_2) | |
| 562 OPENSSL_free(buffer_2); | |
| 563 if (tmp_1) | |
| 564 BN_free(tmp_1); | |
| 565 if (tmp_2) | |
| 566 BN_free(tmp_2); | |
| 567 return(ok); | |
| 568 } | |
| 569 | |
| 570 static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group, | |
| 571 ECPARAMETERS *param) | |
| 572 { | |
| 573 int ok=0; | |
| 574 size_t len=0; | |
| 575 ECPARAMETERS *ret=NULL; | |
| 576 BIGNUM *tmp=NULL; | |
| 577 unsigned char *buffer=NULL; | |
| 578 const EC_POINT *point=NULL; | |
| 579 point_conversion_form_t form; | |
| 580 | |
| 581 if ((tmp = BN_new()) == NULL) | |
| 582 { | |
| 583 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
| 584 goto err; | |
| 585 } | |
| 586 | |
| 587 if (param == NULL) | |
| 588 { | |
| 589 if ((ret = ECPARAMETERS_new()) == NULL) | |
| 590 { | |
| 591 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, | |
| 592 ERR_R_MALLOC_FAILURE); | |
| 593 goto err; | |
| 594 } | |
| 595 } | |
| 596 else | |
| 597 ret = param; | |
| 598 | |
| 599 /* set the version (always one) */ | |
| 600 ret->version = (long)0x1; | |
| 601 | |
| 602 /* set the fieldID */ | |
| 603 if (!ec_asn1_group2fieldid(group, ret->fieldID)) | |
| 604 { | |
| 605 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
| 606 goto err; | |
| 607 } | |
| 608 | |
| 609 /* set the curve */ | |
| 610 if (!ec_asn1_group2curve(group, ret->curve)) | |
| 611 { | |
| 612 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
| 613 goto err; | |
| 614 } | |
| 615 | |
| 616 /* set the base point */ | |
| 617 if ((point = EC_GROUP_get0_generator(group)) == NULL) | |
| 618 { | |
| 619 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, EC_R_UNDEFINED_GENERATOR); | |
| 620 goto err; | |
| 621 } | |
| 622 | |
| 623 form = EC_GROUP_get_point_conversion_form(group); | |
| 624 | |
| 625 len = EC_POINT_point2oct(group, point, form, NULL, len, NULL); | |
| 626 if (len == 0) | |
| 627 { | |
| 628 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
| 629 goto err; | |
| 630 } | |
| 631 if ((buffer = OPENSSL_malloc(len)) == NULL) | |
| 632 { | |
| 633 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
| 634 goto err; | |
| 635 } | |
| 636 if (!EC_POINT_point2oct(group, point, form, buffer, len, NULL)) | |
| 637 { | |
| 638 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
| 639 goto err; | |
| 640 } | |
| 641 if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL) | |
| 642 { | |
| 643 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE); | |
| 644 goto err; | |
| 645 } | |
| 646 if (!ASN1_OCTET_STRING_set(ret->base, buffer, len)) | |
| 647 { | |
| 648 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
| 649 goto err; | |
| 650 } | |
| 651 | |
| 652 /* set the order */ | |
| 653 if (!EC_GROUP_get_order(group, tmp, NULL)) | |
| 654 { | |
| 655 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB); | |
| 656 goto err; | |
| 657 } | |
| 658 ret->order = BN_to_ASN1_INTEGER(tmp, ret->order); | |
| 659 if (ret->order == NULL) | |
| 660 { | |
| 661 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
| 662 goto err; | |
| 663 } | |
| 664 | |
| 665 /* set the cofactor (optional) */ | |
| 666 if (EC_GROUP_get_cofactor(group, tmp, NULL)) | |
| 667 { | |
| 668 ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor); | |
| 669 if (ret->cofactor == NULL) | |
| 670 { | |
| 671 ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB); | |
| 672 goto err; | |
| 673 } | |
| 674 } | |
| 675 | |
| 676 ok = 1; | |
| 677 | |
| 678 err : if(!ok) | |
| 679 { | |
| 680 if (ret && !param) | |
| 681 ECPARAMETERS_free(ret); | |
| 682 ret = NULL; | |
| 683 } | |
| 684 if (tmp) | |
| 685 BN_free(tmp); | |
| 686 if (buffer) | |
| 687 OPENSSL_free(buffer); | |
| 688 return(ret); | |
| 689 } | |
| 690 | |
| 691 ECPKPARAMETERS *ec_asn1_group2pkparameters(const EC_GROUP *group, | |
| 692 ECPKPARAMETERS *params) | |
| 693 { | |
| 694 int ok = 1, tmp; | |
| 695 ECPKPARAMETERS *ret = params; | |
| 696 | |
| 697 if (ret == NULL) | |
| 698 { | |
| 699 if ((ret = ECPKPARAMETERS_new()) == NULL) | |
| 700 { | |
| 701 ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS, | |
| 702 ERR_R_MALLOC_FAILURE); | |
| 703 return NULL; | |
| 704 } | |
| 705 } | |
| 706 else | |
| 707 { | |
| 708 if (ret->type == 0 && ret->value.named_curve) | |
| 709 ASN1_OBJECT_free(ret->value.named_curve); | |
| 710 else if (ret->type == 1 && ret->value.parameters) | |
| 711 ECPARAMETERS_free(ret->value.parameters); | |
| 712 } | |
| 713 | |
| 714 if (EC_GROUP_get_asn1_flag(group)) | |
| 715 { | |
| 716 /* use the asn1 OID to describe the | |
| 717 * the elliptic curve parameters | |
| 718 */ | |
| 719 tmp = EC_GROUP_get_curve_name(group); | |
| 720 if (tmp) | |
| 721 { | |
| 722 ret->type = 0; | |
| 723 if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL) | |
| 724 ok = 0; | |
| 725 } | |
| 726 else | |
| 727 /* we don't kmow the nid => ERROR */ | |
| 728 ok = 0; | |
| 729 } | |
| 730 else | |
| 731 { | |
| 732 /* use the ECPARAMETERS structure */ | |
| 733 ret->type = 1; | |
| 734 if ((ret->value.parameters = ec_asn1_group2parameters( | |
| 735 group, NULL)) == NULL) | |
| 736 ok = 0; | |
| 737 } | |
| 738 | |
| 739 if (!ok) | |
| 740 { | |
| 741 ECPKPARAMETERS_free(ret); | |
| 742 return NULL; | |
| 743 } | |
| 744 return ret; | |
| 745 } | |
| 746 | |
| 747 static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *params) | |
| 748 { | |
| 749 int ok = 0, tmp; | |
| 750 EC_GROUP *ret = NULL; | |
| 751 BIGNUM *p = NULL, *a = NULL, *b = NULL; | |
| 752 EC_POINT *point=NULL; | |
| 753 long field_bits; | |
| 754 | |
| 755 if (!params->fieldID || !params->fieldID->fieldType || | |
| 756 !params->fieldID->p.ptr) | |
| 757 { | |
| 758 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
| 759 goto err; | |
| 760 } | |
| 761 | |
| 762 /* now extract the curve parameters a and b */ | |
| 763 if (!params->curve || !params->curve->a || | |
| 764 !params->curve->a->data || !params->curve->b || | |
| 765 !params->curve->b->data) | |
| 766 { | |
| 767 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
| 768 goto err; | |
| 769 } | |
| 770 a = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL); | |
| 771 if (a == NULL) | |
| 772 { | |
| 773 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB); | |
| 774 goto err; | |
| 775 } | |
| 776 b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL); | |
| 777 if (b == NULL) | |
| 778 { | |
| 779 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB); | |
| 780 goto err; | |
| 781 } | |
| 782 | |
| 783 /* get the field parameters */ | |
| 784 tmp = OBJ_obj2nid(params->fieldID->fieldType); | |
| 785 if (tmp == NID_X9_62_characteristic_two_field) | |
| 786 #ifdef OPENSSL_NO_EC2M | |
| 787 { | |
| 788 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_GF2M_NOT_SUPPORTED); | |
| 789 goto err; | |
| 790 } | |
| 791 #else | |
| 792 { | |
| 793 X9_62_CHARACTERISTIC_TWO *char_two; | |
| 794 | |
| 795 char_two = params->fieldID->p.char_two; | |
| 796 | |
| 797 field_bits = char_two->m; | |
| 798 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) | |
| 799 { | |
| 800 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARG
E); | |
| 801 goto err; | |
| 802 } | |
| 803 | |
| 804 if ((p = BN_new()) == NULL) | |
| 805 { | |
| 806 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_MALLOC_FAILUR
E); | |
| 807 goto err; | |
| 808 } | |
| 809 | |
| 810 /* get the base type */ | |
| 811 tmp = OBJ_obj2nid(char_two->type); | |
| 812 | |
| 813 if (tmp == NID_X9_62_tpBasis) | |
| 814 { | |
| 815 long tmp_long; | |
| 816 | |
| 817 if (!char_two->p.tpBasis) | |
| 818 { | |
| 819 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_E
RROR); | |
| 820 goto err; | |
| 821 } | |
| 822 | |
| 823 tmp_long = ASN1_INTEGER_get(char_two->p.tpBasis); | |
| 824 | |
| 825 if (!(char_two->m > tmp_long && tmp_long > 0)) | |
| 826 { | |
| 827 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALI
D_TRINOMIAL_BASIS); | |
| 828 goto err; | |
| 829 } | |
| 830 | |
| 831 /* create the polynomial */ | |
| 832 if (!BN_set_bit(p, (int)char_two->m)) | |
| 833 goto err; | |
| 834 if (!BN_set_bit(p, (int)tmp_long)) | |
| 835 goto err; | |
| 836 if (!BN_set_bit(p, 0)) | |
| 837 goto err; | |
| 838 } | |
| 839 else if (tmp == NID_X9_62_ppBasis) | |
| 840 { | |
| 841 X9_62_PENTANOMIAL *penta; | |
| 842 | |
| 843 penta = char_two->p.ppBasis; | |
| 844 if (!penta) | |
| 845 { | |
| 846 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_E
RROR); | |
| 847 goto err; | |
| 848 } | |
| 849 | |
| 850 if (!(char_two->m > penta->k3 && penta->k3 > penta->k2 &
& penta->k2 > penta->k1 && penta->k1 > 0)) | |
| 851 { | |
| 852 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALI
D_PENTANOMIAL_BASIS); | |
| 853 goto err; | |
| 854 } | |
| 855 | |
| 856 /* create the polynomial */ | |
| 857 if (!BN_set_bit(p, (int)char_two->m)) goto err; | |
| 858 if (!BN_set_bit(p, (int)penta->k1)) goto err; | |
| 859 if (!BN_set_bit(p, (int)penta->k2)) goto err; | |
| 860 if (!BN_set_bit(p, (int)penta->k3)) goto err; | |
| 861 if (!BN_set_bit(p, 0)) goto err; | |
| 862 } | |
| 863 else if (tmp == NID_X9_62_onBasis) | |
| 864 { | |
| 865 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_NOT_IMPLEMENTE
D); | |
| 866 goto err; | |
| 867 } | |
| 868 else /* error */ | |
| 869 { | |
| 870 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
| 871 goto err; | |
| 872 } | |
| 873 | |
| 874 /* create the EC_GROUP structure */ | |
| 875 ret = EC_GROUP_new_curve_GF2m(p, a, b, NULL); | |
| 876 } | |
| 877 #endif | |
| 878 else if (tmp == NID_X9_62_prime_field) | |
| 879 { | |
| 880 /* we have a curve over a prime field */ | |
| 881 /* extract the prime number */ | |
| 882 if (!params->fieldID->p.prime) | |
| 883 { | |
| 884 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
| 885 goto err; | |
| 886 } | |
| 887 p = ASN1_INTEGER_to_BN(params->fieldID->p.prime, NULL); | |
| 888 if (p == NULL) | |
| 889 { | |
| 890 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
| 891 goto err; | |
| 892 } | |
| 893 | |
| 894 if (BN_is_negative(p) || BN_is_zero(p)) | |
| 895 { | |
| 896 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD)
; | |
| 897 goto err; | |
| 898 } | |
| 899 | |
| 900 field_bits = BN_num_bits(p); | |
| 901 if (field_bits > OPENSSL_ECC_MAX_FIELD_BITS) | |
| 902 { | |
| 903 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_FIELD_TOO_LARG
E); | |
| 904 goto err; | |
| 905 } | |
| 906 | |
| 907 /* create the EC_GROUP structure */ | |
| 908 ret = EC_GROUP_new_curve_GFp(p, a, b, NULL); | |
| 909 } | |
| 910 else | |
| 911 { | |
| 912 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_FIELD); | |
| 913 goto err; | |
| 914 } | |
| 915 | |
| 916 if (ret == NULL) | |
| 917 { | |
| 918 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
| 919 goto err; | |
| 920 } | |
| 921 | |
| 922 /* extract seed (optional) */ | |
| 923 if (params->curve->seed != NULL) | |
| 924 { | |
| 925 if (ret->seed != NULL) | |
| 926 OPENSSL_free(ret->seed); | |
| 927 if (!(ret->seed = OPENSSL_malloc(params->curve->seed->length))) | |
| 928 { | |
| 929 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, | |
| 930 ERR_R_MALLOC_FAILURE); | |
| 931 goto err; | |
| 932 } | |
| 933 memcpy(ret->seed, params->curve->seed->data, | |
| 934 params->curve->seed->length); | |
| 935 ret->seed_len = params->curve->seed->length; | |
| 936 } | |
| 937 | |
| 938 if (!params->order || !params->base || !params->base->data) | |
| 939 { | |
| 940 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
| 941 goto err; | |
| 942 } | |
| 943 | |
| 944 if ((point = EC_POINT_new(ret)) == NULL) goto err; | |
| 945 | |
| 946 /* set the point conversion form */ | |
| 947 EC_GROUP_set_point_conversion_form(ret, (point_conversion_form_t) | |
| 948 (params->base->data[0] & ~0x01)); | |
| 949 | |
| 950 /* extract the ec point */ | |
| 951 if (!EC_POINT_oct2point(ret, point, params->base->data, | |
| 952 params->base->length, NULL)) | |
| 953 { | |
| 954 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
| 955 goto err; | |
| 956 } | |
| 957 | |
| 958 /* extract the order */ | |
| 959 if ((a = ASN1_INTEGER_to_BN(params->order, a)) == NULL) | |
| 960 { | |
| 961 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
| 962 goto err; | |
| 963 } | |
| 964 if (BN_is_negative(a) || BN_is_zero(a)) | |
| 965 { | |
| 966 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER); | |
| 967 goto err; | |
| 968 } | |
| 969 if (BN_num_bits(a) > (int)field_bits + 1) /* Hasse bound */ | |
| 970 { | |
| 971 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_INVALID_GROUP_ORDER); | |
| 972 goto err; | |
| 973 } | |
| 974 | |
| 975 /* extract the cofactor (optional) */ | |
| 976 if (params->cofactor == NULL) | |
| 977 { | |
| 978 if (b) | |
| 979 { | |
| 980 BN_free(b); | |
| 981 b = NULL; | |
| 982 } | |
| 983 } | |
| 984 else | |
| 985 if ((b = ASN1_INTEGER_to_BN(params->cofactor, b)) == NULL) | |
| 986 { | |
| 987 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB); | |
| 988 goto err; | |
| 989 } | |
| 990 /* set the generator, order and cofactor (if present) */ | |
| 991 if (!EC_GROUP_set_generator(ret, point, a, b)) | |
| 992 { | |
| 993 ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB); | |
| 994 goto err; | |
| 995 } | |
| 996 | |
| 997 ok = 1; | |
| 998 | |
| 999 err: if (!ok) | |
| 1000 { | |
| 1001 if (ret) | |
| 1002 EC_GROUP_clear_free(ret); | |
| 1003 ret = NULL; | |
| 1004 } | |
| 1005 | |
| 1006 if (p) | |
| 1007 BN_free(p); | |
| 1008 if (a) | |
| 1009 BN_free(a); | |
| 1010 if (b) | |
| 1011 BN_free(b); | |
| 1012 if (point) | |
| 1013 EC_POINT_free(point); | |
| 1014 return(ret); | |
| 1015 } | |
| 1016 | |
| 1017 EC_GROUP *ec_asn1_pkparameters2group(const ECPKPARAMETERS *params) | |
| 1018 { | |
| 1019 EC_GROUP *ret=NULL; | |
| 1020 int tmp=0; | |
| 1021 | |
| 1022 if (params == NULL) | |
| 1023 { | |
| 1024 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, | |
| 1025 EC_R_MISSING_PARAMETERS); | |
| 1026 return NULL; | |
| 1027 } | |
| 1028 | |
| 1029 if (params->type == 0) | |
| 1030 { /* the curve is given by an OID */ | |
| 1031 tmp = OBJ_obj2nid(params->value.named_curve); | |
| 1032 if ((ret = EC_GROUP_new_by_curve_name(tmp)) == NULL) | |
| 1033 { | |
| 1034 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, | |
| 1035 EC_R_EC_GROUP_NEW_BY_NAME_FAILURE); | |
| 1036 return NULL; | |
| 1037 } | |
| 1038 EC_GROUP_set_asn1_flag(ret, OPENSSL_EC_NAMED_CURVE); | |
| 1039 } | |
| 1040 else if (params->type == 1) | |
| 1041 { /* the parameters are given by a ECPARAMETERS | |
| 1042 * structure */ | |
| 1043 ret = ec_asn1_parameters2group(params->value.parameters); | |
| 1044 if (!ret) | |
| 1045 { | |
| 1046 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, ERR_R_EC_LIB); | |
| 1047 return NULL; | |
| 1048 } | |
| 1049 EC_GROUP_set_asn1_flag(ret, 0x0); | |
| 1050 } | |
| 1051 else if (params->type == 2) | |
| 1052 { /* implicitlyCA */ | |
| 1053 return NULL; | |
| 1054 } | |
| 1055 else | |
| 1056 { | |
| 1057 ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, EC_R_ASN1_ERROR); | |
| 1058 return NULL; | |
| 1059 } | |
| 1060 | |
| 1061 return ret; | |
| 1062 } | |
| 1063 | |
| 1064 /* EC_GROUP <-> DER encoding of ECPKPARAMETERS */ | |
| 1065 | |
| 1066 EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len) | |
| 1067 { | |
| 1068 EC_GROUP *group = NULL; | |
| 1069 ECPKPARAMETERS *params = NULL; | |
| 1070 | |
| 1071 if ((params = d2i_ECPKPARAMETERS(NULL, in, len)) == NULL) | |
| 1072 { | |
| 1073 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE); | |
| 1074 ECPKPARAMETERS_free(params); | |
| 1075 return NULL; | |
| 1076 } | |
| 1077 | |
| 1078 if ((group = ec_asn1_pkparameters2group(params)) == NULL) | |
| 1079 { | |
| 1080 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE); | |
| 1081 ECPKPARAMETERS_free(params); | |
| 1082 return NULL; | |
| 1083 } | |
| 1084 | |
| 1085 | |
| 1086 if (a && *a) | |
| 1087 EC_GROUP_clear_free(*a); | |
| 1088 if (a) | |
| 1089 *a = group; | |
| 1090 | |
| 1091 ECPKPARAMETERS_free(params); | |
| 1092 return(group); | |
| 1093 } | |
| 1094 | |
| 1095 int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out) | |
| 1096 { | |
| 1097 int ret=0; | |
| 1098 ECPKPARAMETERS *tmp = ec_asn1_group2pkparameters(a, NULL); | |
| 1099 if (tmp == NULL) | |
| 1100 { | |
| 1101 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE); | |
| 1102 return 0; | |
| 1103 } | |
| 1104 if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0) | |
| 1105 { | |
| 1106 ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE); | |
| 1107 ECPKPARAMETERS_free(tmp); | |
| 1108 return 0; | |
| 1109 } | |
| 1110 ECPKPARAMETERS_free(tmp); | |
| 1111 return(ret); | |
| 1112 } | |
| 1113 | |
| 1114 /* some EC_KEY functions */ | |
| 1115 | |
| 1116 EC_KEY *d2i_ECPrivateKey(EC_KEY **a, const unsigned char **in, long len) | |
| 1117 { | |
| 1118 int ok=0; | |
| 1119 EC_KEY *ret=NULL; | |
| 1120 EC_PRIVATEKEY *priv_key=NULL; | |
| 1121 | |
| 1122 if ((priv_key = EC_PRIVATEKEY_new()) == NULL) | |
| 1123 { | |
| 1124 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE); | |
| 1125 return NULL; | |
| 1126 } | |
| 1127 | |
| 1128 if ((priv_key = d2i_EC_PRIVATEKEY(&priv_key, in, len)) == NULL) | |
| 1129 { | |
| 1130 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
| 1131 EC_PRIVATEKEY_free(priv_key); | |
| 1132 return NULL; | |
| 1133 } | |
| 1134 | |
| 1135 if (a == NULL || *a == NULL) | |
| 1136 { | |
| 1137 if ((ret = EC_KEY_new()) == NULL) | |
| 1138 { | |
| 1139 ECerr(EC_F_D2I_ECPRIVATEKEY, | |
| 1140 ERR_R_MALLOC_FAILURE); | |
| 1141 goto err; | |
| 1142 } | |
| 1143 if (a) | |
| 1144 *a = ret; | |
| 1145 } | |
| 1146 else | |
| 1147 ret = *a; | |
| 1148 | |
| 1149 if (priv_key->parameters) | |
| 1150 { | |
| 1151 if (ret->group) | |
| 1152 EC_GROUP_clear_free(ret->group); | |
| 1153 ret->group = ec_asn1_pkparameters2group(priv_key->parameters); | |
| 1154 } | |
| 1155 | |
| 1156 if (ret->group == NULL) | |
| 1157 { | |
| 1158 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
| 1159 goto err; | |
| 1160 } | |
| 1161 | |
| 1162 ret->version = priv_key->version; | |
| 1163 | |
| 1164 if (priv_key->privateKey) | |
| 1165 { | |
| 1166 ret->priv_key = BN_bin2bn( | |
| 1167 M_ASN1_STRING_data(priv_key->privateKey), | |
| 1168 M_ASN1_STRING_length(priv_key->privateKey), | |
| 1169 ret->priv_key); | |
| 1170 if (ret->priv_key == NULL) | |
| 1171 { | |
| 1172 ECerr(EC_F_D2I_ECPRIVATEKEY, | |
| 1173 ERR_R_BN_LIB); | |
| 1174 goto err; | |
| 1175 } | |
| 1176 } | |
| 1177 else | |
| 1178 { | |
| 1179 ECerr(EC_F_D2I_ECPRIVATEKEY, | |
| 1180 EC_R_MISSING_PRIVATE_KEY); | |
| 1181 goto err; | |
| 1182 } | |
| 1183 | |
| 1184 if (priv_key->publicKey) | |
| 1185 { | |
| 1186 const unsigned char *pub_oct; | |
| 1187 size_t pub_oct_len; | |
| 1188 | |
| 1189 if (ret->pub_key) | |
| 1190 EC_POINT_clear_free(ret->pub_key); | |
| 1191 ret->pub_key = EC_POINT_new(ret->group); | |
| 1192 if (ret->pub_key == NULL) | |
| 1193 { | |
| 1194 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
| 1195 goto err; | |
| 1196 } | |
| 1197 pub_oct = M_ASN1_STRING_data(priv_key->publicKey); | |
| 1198 pub_oct_len = M_ASN1_STRING_length(priv_key->publicKey); | |
| 1199 /* save the point conversion form */ | |
| 1200 ret->conv_form = (point_conversion_form_t)(pub_oct[0] & ~0x01); | |
| 1201 if (!EC_POINT_oct2point(ret->group, ret->pub_key, | |
| 1202 pub_oct, pub_oct_len, NULL)) | |
| 1203 { | |
| 1204 ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_EC_LIB); | |
| 1205 goto err; | |
| 1206 } | |
| 1207 } | |
| 1208 | |
| 1209 ok = 1; | |
| 1210 err: | |
| 1211 if (!ok) | |
| 1212 { | |
| 1213 if (ret) | |
| 1214 EC_KEY_free(ret); | |
| 1215 ret = NULL; | |
| 1216 } | |
| 1217 | |
| 1218 if (priv_key) | |
| 1219 EC_PRIVATEKEY_free(priv_key); | |
| 1220 | |
| 1221 return(ret); | |
| 1222 } | |
| 1223 | |
| 1224 int i2d_ECPrivateKey(EC_KEY *a, unsigned char **out) | |
| 1225 { | |
| 1226 int ret=0, ok=0; | |
| 1227 unsigned char *buffer=NULL; | |
| 1228 size_t buf_len=0, tmp_len; | |
| 1229 EC_PRIVATEKEY *priv_key=NULL; | |
| 1230 | |
| 1231 if (a == NULL || a->group == NULL || a->priv_key == NULL) | |
| 1232 { | |
| 1233 ECerr(EC_F_I2D_ECPRIVATEKEY, | |
| 1234 ERR_R_PASSED_NULL_PARAMETER); | |
| 1235 goto err; | |
| 1236 } | |
| 1237 | |
| 1238 if ((priv_key = EC_PRIVATEKEY_new()) == NULL) | |
| 1239 { | |
| 1240 ECerr(EC_F_I2D_ECPRIVATEKEY, | |
| 1241 ERR_R_MALLOC_FAILURE); | |
| 1242 goto err; | |
| 1243 } | |
| 1244 | |
| 1245 priv_key->version = a->version; | |
| 1246 | |
| 1247 buf_len = (size_t)BN_num_bytes(a->priv_key); | |
| 1248 buffer = OPENSSL_malloc(buf_len); | |
| 1249 if (buffer == NULL) | |
| 1250 { | |
| 1251 ECerr(EC_F_I2D_ECPRIVATEKEY, | |
| 1252 ERR_R_MALLOC_FAILURE); | |
| 1253 goto err; | |
| 1254 } | |
| 1255 | |
| 1256 if (!BN_bn2bin(a->priv_key, buffer)) | |
| 1257 { | |
| 1258 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_BN_LIB); | |
| 1259 goto err; | |
| 1260 } | |
| 1261 | |
| 1262 if (!M_ASN1_OCTET_STRING_set(priv_key->privateKey, buffer, buf_len)) | |
| 1263 { | |
| 1264 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB); | |
| 1265 goto err; | |
| 1266 } | |
| 1267 | |
| 1268 if (!(a->enc_flag & EC_PKEY_NO_PARAMETERS)) | |
| 1269 { | |
| 1270 if ((priv_key->parameters = ec_asn1_group2pkparameters( | |
| 1271 a->group, priv_key->parameters)) == NULL) | |
| 1272 { | |
| 1273 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
| 1274 goto err; | |
| 1275 } | |
| 1276 } | |
| 1277 | |
| 1278 if (!(a->enc_flag & EC_PKEY_NO_PUBKEY)) | |
| 1279 { | |
| 1280 priv_key->publicKey = M_ASN1_BIT_STRING_new(); | |
| 1281 if (priv_key->publicKey == NULL) | |
| 1282 { | |
| 1283 ECerr(EC_F_I2D_ECPRIVATEKEY, | |
| 1284 ERR_R_MALLOC_FAILURE); | |
| 1285 goto err; | |
| 1286 } | |
| 1287 | |
| 1288 tmp_len = EC_POINT_point2oct(a->group, a->pub_key, | |
| 1289 a->conv_form, NULL, 0, NULL); | |
| 1290 | |
| 1291 if (tmp_len > buf_len) | |
| 1292 { | |
| 1293 unsigned char *tmp_buffer = OPENSSL_realloc(buffer, tmp_
len); | |
| 1294 if (!tmp_buffer) | |
| 1295 { | |
| 1296 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_MALLOC_FAILUR
E); | |
| 1297 goto err; | |
| 1298 } | |
| 1299 buffer = tmp_buffer; | |
| 1300 buf_len = tmp_len; | |
| 1301 } | |
| 1302 | |
| 1303 if (!EC_POINT_point2oct(a->group, a->pub_key, | |
| 1304 a->conv_form, buffer, buf_len, NULL)) | |
| 1305 { | |
| 1306 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
| 1307 goto err; | |
| 1308 } | |
| 1309 | |
| 1310 priv_key->publicKey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07)
; | |
| 1311 priv_key->publicKey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
| 1312 if (!M_ASN1_BIT_STRING_set(priv_key->publicKey, buffer, | |
| 1313 buf_len)) | |
| 1314 { | |
| 1315 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_ASN1_LIB); | |
| 1316 goto err; | |
| 1317 } | |
| 1318 } | |
| 1319 | |
| 1320 if ((ret = i2d_EC_PRIVATEKEY(priv_key, out)) == 0) | |
| 1321 { | |
| 1322 ECerr(EC_F_I2D_ECPRIVATEKEY, ERR_R_EC_LIB); | |
| 1323 goto err; | |
| 1324 } | |
| 1325 ok=1; | |
| 1326 err: | |
| 1327 if (buffer) | |
| 1328 OPENSSL_free(buffer); | |
| 1329 if (priv_key) | |
| 1330 EC_PRIVATEKEY_free(priv_key); | |
| 1331 return(ok?ret:0); | |
| 1332 } | |
| 1333 | |
| 1334 int i2d_ECParameters(EC_KEY *a, unsigned char **out) | |
| 1335 { | |
| 1336 if (a == NULL) | |
| 1337 { | |
| 1338 ECerr(EC_F_I2D_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
| 1339 return 0; | |
| 1340 } | |
| 1341 return i2d_ECPKParameters(a->group, out); | |
| 1342 } | |
| 1343 | |
| 1344 EC_KEY *d2i_ECParameters(EC_KEY **a, const unsigned char **in, long len) | |
| 1345 { | |
| 1346 EC_KEY *ret; | |
| 1347 | |
| 1348 if (in == NULL || *in == NULL) | |
| 1349 { | |
| 1350 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_PASSED_NULL_PARAMETER); | |
| 1351 return NULL; | |
| 1352 } | |
| 1353 | |
| 1354 if (a == NULL || *a == NULL) | |
| 1355 { | |
| 1356 if ((ret = EC_KEY_new()) == NULL) | |
| 1357 { | |
| 1358 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE); | |
| 1359 return NULL; | |
| 1360 } | |
| 1361 if (a) | |
| 1362 *a = ret; | |
| 1363 } | |
| 1364 else | |
| 1365 ret = *a; | |
| 1366 | |
| 1367 if (!d2i_ECPKParameters(&ret->group, in, len)) | |
| 1368 { | |
| 1369 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB); | |
| 1370 return NULL; | |
| 1371 } | |
| 1372 | |
| 1373 return ret; | |
| 1374 } | |
| 1375 | |
| 1376 EC_KEY *o2i_ECPublicKey(EC_KEY **a, const unsigned char **in, long len) | |
| 1377 { | |
| 1378 EC_KEY *ret=NULL; | |
| 1379 | |
| 1380 if (a == NULL || (*a) == NULL || (*a)->group == NULL) | |
| 1381 { | |
| 1382 /* sorry, but a EC_GROUP-structur is necessary | |
| 1383 * to set the public key */ | |
| 1384 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
| 1385 return 0; | |
| 1386 } | |
| 1387 ret = *a; | |
| 1388 if (ret->pub_key == NULL && | |
| 1389 (ret->pub_key = EC_POINT_new(ret->group)) == NULL) | |
| 1390 { | |
| 1391 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); | |
| 1392 return 0; | |
| 1393 } | |
| 1394 if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL)) | |
| 1395 { | |
| 1396 ECerr(EC_F_O2I_ECPUBLICKEY, ERR_R_EC_LIB); | |
| 1397 return 0; | |
| 1398 } | |
| 1399 /* save the point conversion form */ | |
| 1400 ret->conv_form = (point_conversion_form_t)(*in[0] & ~0x01); | |
| 1401 *in += len; | |
| 1402 return ret; | |
| 1403 } | |
| 1404 | |
| 1405 int i2o_ECPublicKey(EC_KEY *a, unsigned char **out) | |
| 1406 { | |
| 1407 size_t buf_len=0; | |
| 1408 int new_buffer = 0; | |
| 1409 | |
| 1410 if (a == NULL) | |
| 1411 { | |
| 1412 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_PASSED_NULL_PARAMETER); | |
| 1413 return 0; | |
| 1414 } | |
| 1415 | |
| 1416 buf_len = EC_POINT_point2oct(a->group, a->pub_key, | |
| 1417 a->conv_form, NULL, 0, NULL); | |
| 1418 | |
| 1419 if (out == NULL || buf_len == 0) | |
| 1420 /* out == NULL => just return the length of the octet string */ | |
| 1421 return buf_len; | |
| 1422 | |
| 1423 if (*out == NULL) | |
| 1424 { | |
| 1425 if ((*out = OPENSSL_malloc(buf_len)) == NULL) | |
| 1426 { | |
| 1427 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_MALLOC_FAILURE); | |
| 1428 return 0; | |
| 1429 } | |
| 1430 new_buffer = 1; | |
| 1431 } | |
| 1432 if (!EC_POINT_point2oct(a->group, a->pub_key, a->conv_form, | |
| 1433 *out, buf_len, NULL)) | |
| 1434 { | |
| 1435 ECerr(EC_F_I2O_ECPUBLICKEY, ERR_R_EC_LIB); | |
| 1436 if (new_buffer) | |
| 1437 { | |
| 1438 OPENSSL_free(*out); | |
| 1439 *out = NULL; | |
| 1440 } | |
| 1441 return 0; | |
| 1442 } | |
| 1443 if (!new_buffer) | |
| 1444 *out += buf_len; | |
| 1445 return buf_len; | |
| 1446 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master