crypto/ecdsa/ecs_asn1.c

   1 /* crypto/ecdsa/ecs_asn1.c */
   2 /* ====================================================================
   3  * Copyright (c) 2000-2002 The OpenSSL Project.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the
  15  *    distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this
  18  *    software must display the following acknowledgment:
  19  *    "This product includes software developed by the OpenSSL Project
  20  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  21  *
  22  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  23  *    endorse or promote products derived from this software without
  24  *    prior written permission. For written permission, please contact
  25  *    licensing@OpenSSL.org.
  26  *
  27  * 5. Products derived from this software may not be called "OpenSSL"
  28  *    nor may "OpenSSL" appear in their names without prior written
  29  *    permission of the OpenSSL Project.
  30  *
  31  * 6. Redistributions of any form whatsoever must retain the following
  32  *    acknowledgment:
  33  *    "This product includes software developed by the OpenSSL Project
  34  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  37  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  39  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  42  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  43  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  44  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  45  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  46  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  47  * OF THE POSSIBILITY OF SUCH DAMAGE.
  48  * ====================================================================
  49  *
  50  * This product includes cryptographic software written by Eric Young
  51  * (eay@cryptsoft.com).  This product includes software written by Tim
  52  * Hudson (tjh@cryptsoft.com).
  53  *
  54  */
  55
  56 #include "cryptlib.h"
  57 #include "ecs_locl.h"
  58 #include <openssl/asn1.h>
  59 #include <openssl/asn1t.h>
  60 #include <openssl/objects.h>
  61
  62 ASN1_SEQUENCE(ECDSA_SIG) = {
  63         ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM),
  64         ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM)
  65 } ASN1_SEQUENCE_END(ECDSA_SIG)
  66
  67 IMPLEMENT_ASN1_FUNCTIONS_const(ECDSA_SIG)
  68
  69 ASN1_SEQUENCE(X9_62_FIELDID) = {
  70         ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
  71         ASN1_SIMPLE(X9_62_FIELDID, parameters, ASN1_ANY)
  72 } ASN1_SEQUENCE_END(X9_62_FIELDID)
  73
  74 DECLARE_ASN1_FUNCTIONS_const(X9_62_FIELDID)
  75 DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_FIELDID, X9_62_FIELDID)
  76 IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_FIELDID)
  77
  78 ASN1_SEQUENCE(X9_62_CURVE) = {
  79         ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING),
  80         ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING),
  81         ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING)
  82 } ASN1_SEQUENCE_END(X9_62_CURVE)
  83
  84 DECLARE_ASN1_FUNCTIONS_const(X9_62_CURVE)
  85 DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_CURVE, X9_62_CURVE)
  86 IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_CURVE)
  87
  88 ASN1_SEQUENCE(X9_62_EC_PARAMETERS) = {
  89         ASN1_SIMPLE(X9_62_EC_PARAMETERS, version, ASN1_INTEGER),
  90         ASN1_SIMPLE(X9_62_EC_PARAMETERS, fieldID, X9_62_FIELDID),
  91         ASN1_SIMPLE(X9_62_EC_PARAMETERS, curve, X9_62_CURVE),
  92         ASN1_SIMPLE(X9_62_EC_PARAMETERS, base, ASN1_OCTET_STRING),
  93         ASN1_SIMPLE(X9_62_EC_PARAMETERS, order, ASN1_INTEGER),
  94         ASN1_SIMPLE(X9_62_EC_PARAMETERS, cofactor, ASN1_INTEGER)
  95 } ASN1_SEQUENCE_END(X9_62_EC_PARAMETERS)
  96
  97 DECLARE_ASN1_FUNCTIONS_const(X9_62_EC_PARAMETERS)
  98 DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_EC_PARAMETERS, X9_62_EC_PARAMETERS)
  99 IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_EC_PARAMETERS)
 100
 101 ASN1_CHOICE(EC_PARAMETERS) = {
 102         ASN1_SIMPLE(EC_PARAMETERS, value.named_curve, ASN1_OBJECT),
 103         ASN1_SIMPLE(EC_PARAMETERS, value.parameters, X9_62_EC_PARAMETERS),
 104         ASN1_SIMPLE(EC_PARAMETERS, value.implicitlyCA, ASN1_NULL)
 105 } ASN1_CHOICE_END(EC_PARAMETERS)
 106
 107 DECLARE_ASN1_FUNCTIONS_const(EC_PARAMETERS)
 108 DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PARAMETERS, EC_PARAMETERS)
 109 IMPLEMENT_ASN1_FUNCTIONS_const(EC_PARAMETERS)
 110
 111 ASN1_SEQUENCE(ECDSAPrivateKey) = {
 112         ASN1_SIMPLE(ECDSAPrivateKey, version, LONG),
 113         ASN1_SIMPLE(ECDSAPrivateKey, parameters, EC_PARAMETERS),
 114         ASN1_SIMPLE(ECDSAPrivateKey, pub_key, ASN1_OCTET_STRING),
 115         ASN1_SIMPLE(ECDSAPrivateKey, priv_key, BIGNUM)
 116 } ASN1_SEQUENCE_END(ECDSAPrivateKey)
 117
 118 DECLARE_ASN1_FUNCTIONS_const(ECDSAPrivateKey)
 119 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSAPrivateKey, ecdsaPrivateKey)
 120 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(ECDSAPrivateKey, ECDSAPrivateKey, ECDSAPrivateKey)
 121 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSAPrivateKey, ECDSAPrivateKey, ecdsaPrivateKey)
 122
 123
 124 X9_62_FIELDID   *ECDSA_get_X9_62_FIELDID(const ECDSA *ecdsa, X9_62_FIELDID *field)
 125 {
 126         /* TODO : characteristic two */
 127         int     ok=0, reason=ERR_R_ASN1_LIB;
 128         X9_62_FIELDID *ret=NULL;
 129         BIGNUM  *tmp=NULL;
 130
 131         if (!ecdsa || !ecdsa->group)
 132                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 133         if (field == NULL)
 134         {
 135                 if ((ret = X9_62_FIELDID_new()) == NULL) return NULL;
 136         }
 137         else
 138         {
 139                 ret = field;
 140                 if (ret->fieldType != NULL)     ASN1_OBJECT_free(ret->fieldType);
 141                 if (ret->parameters != NULL)    ASN1_TYPE_free(ret->parameters);
 142         }
 143         if ((tmp = BN_new()) == NULL)
 144                 OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 145         if ((ret->fieldType = OBJ_nid2obj(NID_X9_62_prime_field)) == NULL)
 146                 OPENSSL_ECDSA_ABORT(ERR_R_OBJ_LIB)
 147         if ((ret->parameters = ASN1_TYPE_new()) == NULL) goto err;
 148         ret->parameters->type = V_ASN1_INTEGER;
 149         if (!EC_GROUP_get_curve_GFp(ecdsa->group, tmp, NULL, NULL, NULL))
 150                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 151         if ((ret->parameters->value.integer = BN_to_ASN1_INTEGER(tmp, NULL)) == NULL) goto err;
 152         ok = 1;
 153 err :   if (!ok)
 154         {
 155                 if (ret && !field) X9_62_FIELDID_free(ret);
 156                 ret = NULL;
 157                 ECDSAerr(ECDSA_F_ECDSA_GET_X9_62_FIELDID, reason);
 158         }
 159         if (tmp) BN_free(tmp);
 160         return(ret);
 161 }
 162
 163 X9_62_CURVE   *ECDSA_get_X9_62_CURVE(const ECDSA *ecdsa, X9_62_CURVE *curve)
 164 {
 165         int     ok=0, reason=ERR_R_BN_LIB, len1=0, len2=0;
 166         X9_62_CURVE *ret=NULL;
 167         BIGNUM      *tmp1=NULL, *tmp2=NULL;
 168         unsigned char *buffer=NULL;
 169         unsigned char char_buf = 0;
 170
 171         if (!ecdsa || !ecdsa->group)
 172                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 173         if ((tmp1 = BN_new()) == NULL || (tmp2 = BN_new()) == NULL) goto err;
 174         if (curve == NULL)
 175         {
 176                 if ((ret = X9_62_CURVE_new()) == NULL)
 177                         OPENSSL_ECDSA_ABORT(ECDSA_R_X9_62_CURVE_NEW_FAILURE)
 178         }
 179         else
 180         {
 181                 ret = curve;
 182                 if (ret->a)     ASN1_OCTET_STRING_free(ret->a);
 183                 if (ret->b)     ASN1_OCTET_STRING_free(ret->b);
 184                 if (ret->seed)  ASN1_BIT_STRING_free(ret->seed);
 185         }
 186         if (!EC_GROUP_get_curve_GFp(ecdsa->group, NULL, tmp1, tmp2, NULL))
 187                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 188
 189         if ((ret->a = M_ASN1_OCTET_STRING_new()) == NULL ||
 190             (ret->b = M_ASN1_OCTET_STRING_new()) == NULL )
 191                 OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 192
 193         len1 = BN_num_bytes(tmp1);
 194         len2 = BN_num_bytes(tmp2);
 195
 196         if ((buffer = OPENSSL_malloc(len1 > len2 ? len1 : len2)) == NULL)
 197                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 198
 199         if (len1 == 0) /* => a == 0 */
 200         {
 201                 if (!M_ASN1_OCTET_STRING_set(ret->a, &char_buf, 1))
 202                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 203         }
 204         else
 205         {
 206                 if ((len1 = BN_bn2bin(tmp1, buffer)) == 0) goto err;
 207                 if (!M_ASN1_OCTET_STRING_set(ret->a, buffer, len1))
 208                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 209         }
 210         if (len2 == 0) /* => b == 0 */
 211         {
 212                 if (!M_ASN1_OCTET_STRING_set(ret->a, &char_buf, 1))
 213                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 214         }
 215         else
 216         {
 217                 if ((len2 = BN_bn2bin(tmp2, buffer)) == 0) goto err;
 218                 if (!M_ASN1_OCTET_STRING_set(ret->b, buffer, len2))
 219                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 220         }
 221
 222         if (ecdsa->seed)
 223         {
 224                 if ((ret->seed = ASN1_BIT_STRING_new()) == NULL) goto err;
 225                 if (!ASN1_BIT_STRING_set(ret->seed, ecdsa->seed, (int)ecdsa->seed_len))
 226                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 227         }
 228         else
 229                 ret->seed = NULL;
 230
 231         ok = 1;
 232 err :   if (!ok)
 233         {
 234                 if (ret && !curve) X9_62_CURVE_free(ret);
 235                 ret = NULL;
 236                 ECDSAerr(ECDSA_F_ECDSA_GET_X9_62_CURVE, reason);
 237         }
 238         if (buffer) OPENSSL_free(buffer);
 239         if (tmp1)   BN_free(tmp1);
 240         if (tmp2)   BN_free(tmp2);
 241         return(ret);
 242 }
 243
 244 X9_62_EC_PARAMETERS *ECDSA_get_X9_62_EC_PARAMETERS(const ECDSA *ecdsa, X9_62_EC_PARAMETERS *param)
 245 {
 246         int     ok=0, reason=ERR_R_ASN1_LIB;
 247         size_t  len=0;
 248         X9_62_EC_PARAMETERS *ret=NULL;
 249         BIGNUM        *tmp=NULL;
 250         unsigned char *buffer=NULL;
 251         EC_POINT      *point=NULL;
 252
 253         if (!ecdsa || !ecdsa->group)
 254                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 255         if ((tmp = BN_new()) == NULL)
 256                 OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 257         if (param == NULL)
 258         {
 259                 if ((ret = X9_62_EC_PARAMETERS_new()) == NULL)
 260                         OPENSSL_ECDSA_ABORT(ECDSA_R_X9_62_EC_PARAMETERS_NEW_FAILURE)
 261         }
 262         else
 263                 ret = param;
 264         if (ret->version == NULL && (ret->version = ASN1_INTEGER_new()) == NULL)
 265                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 266         if (!ASN1_INTEGER_set(ret->version, (long)ecdsa->version)) goto err;
 267         if ((ret->fieldID = ECDSA_get_X9_62_FIELDID(ecdsa, ret->fieldID)) == NULL)
 268                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_X9_62_FIELDID_FAILURE)
 269         if ((ret->curve = ECDSA_get_X9_62_CURVE(ecdsa, ret->curve)) == NULL)
 270                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_X9_62_CURVE_FAILURE)
 271         if ((point = EC_GROUP_get0_generator(ecdsa->group)) == NULL)
 272                 OPENSSL_ECDSA_ABORT(ECDSA_R_CAN_NOT_GET_GENERATOR)
 273         if (!(len = EC_POINT_point2oct(ecdsa->group, point, POINT_CONVERSION_COMPRESSED, NULL, len, NULL)))
 274                 OPENSSL_ECDSA_ABORT(ECDSA_R_UNEXPECTED_PARAMETER_LENGTH)
 275         if ((buffer = OPENSSL_malloc(len)) == NULL)
 276                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 277         if (!EC_POINT_point2oct(ecdsa->group, point, POINT_CONVERSION_COMPRESSED, buffer, len, NULL))
 278                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 279         if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL)
 280                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 281         if (!ASN1_OCTET_STRING_set(ret->base, buffer, len)) goto err;
 282         if (!EC_GROUP_get_order(ecdsa->group, tmp, NULL))
 283                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 284         if ((ret->order = BN_to_ASN1_INTEGER(tmp, ret->order)) == NULL) goto err;
 285         if (!EC_GROUP_get_cofactor(ecdsa->group, tmp, NULL))
 286                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 287         if ((ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor)) == NULL) goto err;
 288         ok = 1;
 289
 290 err :   if(!ok)
 291         {
 292                 ECDSAerr(ECDSA_F_ECDSA_GET_X9_62_EC_PARAMETERS, reason);
 293                 if (ret && !param) X9_62_EC_PARAMETERS_free(ret);
 294                 ret = NULL;
 295         }
 296         if (tmp)    BN_free(tmp);
 297         if (buffer) OPENSSL_free(buffer);
 298         return(ret);
 299 }
 300
 301 EC_PARAMETERS *ECDSA_get_EC_PARAMETERS(const ECDSA *ecdsa, EC_PARAMETERS *params)
 302 {
 303         int ok = 1;
 304         int tmp = 0;
 305         EC_PARAMETERS *ret = params;
 306         if (ret == NULL)
 307                 if ((ret = EC_PARAMETERS_new()) == NULL)
 308                 {
 309                         ECDSAerr(ECDSA_F_ECDSA_GET_EC_PARAMETERS, ERR_R_MALLOC_FAILURE);
 310                         return NULL;
 311                 }
 312         if (ecdsa == NULL)
 313         {       /* missing parameter */
 314                 ECDSAerr(ECDSA_F_ECDSA_GET_EC_PARAMETERS, ECDSA_R_MISSING_PARAMETERS);
 315                 EC_PARAMETERS_free(params);
 316                 return NULL;
 317         }
 318         if (ecdsa->parameter_flags & ECDSA_FLAG_NAMED_CURVE)
 319         {       /* use a named curve */
 320                 tmp = EC_GROUP_get_nid(ecdsa->group);
 321                 if (tmp)
 322                 {
 323                         ret->type = 0;
 324                         if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
 325                                 ok = 0;
 326                 }
 327                 else
 328                 {
 329                         /* use the x9_64 ec_parameters structure */
 330                         ret->type = 1;
 331                         if ((ret->value.parameters = ECDSA_get_X9_62_EC_PARAMETERS(ecdsa, NULL)) == NULL)
 332                                 ok = 0;
 333                 }
 334         }
 335         else if (ecdsa->parameter_flags & ECDSA_FLAG_IMPLICITLYCA)
 336         {       /* use implicitlyCA */
 337                 ret->type = 2;
 338                 if ((ret->value.implicitlyCA = ASN1_NULL_new()) == NULL)
 339                         ok = 0;
 340         }
 341         else
 342         {       /* use the x9_64 ec_parameters structure */
 343                 ret->type = 1;
 344                 if ((ret->value.parameters = ECDSA_get_X9_62_EC_PARAMETERS(ecdsa, NULL)) == NULL)
 345                         ok = 0;
 346         }
 347         if (!ok)
 348         {
 349                 EC_PARAMETERS_free(ret);
 350                 return NULL;
 351         }
 352                 return ret;
 353 }
 354
 355 ECDSA         *ECDSA_x9_62parameters2ecdsa(const X9_62_EC_PARAMETERS *params, ECDSA *ecdsa)
 356 {
 357         int       ok=0, reason=ERR_R_EC_LIB, tmp;
 358         ECDSA     *ret=NULL;
 359         const EC_METHOD *meth=NULL;
 360         BIGNUM    *tmp_1=NULL, *tmp_2=NULL, *tmp_3=NULL;
 361         EC_POINT  *point=NULL;
 362
 363         if (!params)
 364                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 365         if (ecdsa == NULL)
 366         {
 367                 if ((ret = ECDSA_new()) == NULL)
 368                         OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_NEW_FAILURE)
 369         }
 370         else
 371         {
 372                 if (ecdsa->group)       EC_GROUP_free(ecdsa->group);
 373                 if (ecdsa->pub_key)     EC_POINT_free(ecdsa->pub_key);
 374                 ecdsa->pub_key = NULL;
 375                 if (ecdsa->priv_key)    BN_clear_free(ecdsa->priv_key);
 376                 ecdsa->priv_key = NULL;
 377                 if (ecdsa->seed)        OPENSSL_free(ecdsa->seed);
 378                 ecdsa->seed = NULL;
 379                 if (ecdsa->kinv)
 380                 {
 381                         BN_clear_free(ecdsa->kinv);
 382                         ecdsa->kinv = NULL;
 383                 }
 384                 if (ecdsa->r)
 385                 {
 386                         BN_clear_free(ecdsa->r);
 387                         ecdsa->r = NULL;
 388                 }
 389                 ret = ecdsa;
 390         }
 391         /* TODO : characteristic two */
 392         if (!params->fieldID || !params->fieldID->fieldType || !params->fieldID->parameters)
 393                 OPENSSL_ECDSA_ABORT(ECDSA_R_NO_FIELD_SPECIFIED)
 394         tmp = OBJ_obj2nid(params->fieldID->fieldType);
 395         if (tmp == NID_X9_62_characteristic_two_field)
 396         {
 397                 OPENSSL_ECDSA_ABORT(ECDSA_R_NOT_SUPPORTED)
 398         }
 399         else if (tmp == NID_X9_62_prime_field)
 400         {
 401                 /* TODO : optimal method for the curve */
 402                 meth = EC_GFp_mont_method();
 403                 if ((ret->group = EC_GROUP_new(meth)) == NULL) goto err;
 404                 if (params->fieldID->parameters->type != V_ASN1_INTEGER)
 405                         OPENSSL_ECDSA_ABORT(ECDSA_R_UNEXPECTED_ASN1_TYPE)
 406                 if (!params->fieldID->parameters->value.integer)
 407                         OPENSSL_ECDSA_ABORT(ECDSA_R_PRIME_MISSING)
 408                 if ((tmp_1 = ASN1_INTEGER_to_BN(params->fieldID->parameters->value.integer, NULL)) == NULL)
 409                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 410                 if (!params->curve)
 411                         OPENSSL_ECDSA_ABORT(ECDSA_R_NO_CURVE_SPECIFIED)
 412                 if (!params->curve->a || !params->curve->a->data)
 413                         OPENSSL_ECDSA_ABORT(ECDSA_R_NO_CURVE_PARAMETER_A_SPECIFIED)
 414                 if ((tmp_2 = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL)) == NULL)
 415                         OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 416                 if (!params->curve->b || !params->curve->b->data)
 417                         OPENSSL_ECDSA_ABORT(ECDSA_R_NO_CURVE_PARAMETER_B_SPECIFIED)
 418                 if ((tmp_3 = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL)) == NULL)
 419                         OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 420                 if (!EC_GROUP_set_curve_GFp(ret->group, tmp_1, tmp_2, tmp_3, NULL)) goto err;
 421                 if ((point = EC_POINT_new(ret->group)) == NULL) goto err;
 422         }
 423         else OPENSSL_ECDSA_ABORT(ECDSA_R_WRONG_FIELD_IDENTIFIER)
 424         if (params->curve->seed != NULL)
 425         {
 426                 if (ret->seed != NULL)
 427                         OPENSSL_free(ret->seed);
 428                 if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL)
 429                         OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 430                 memcpy(ret->seed, params->curve->seed->data, params->curve->seed->length);
 431                 ret->seed_len = params->curve->seed->length;
 432         }
 433         if (params->version)
 434         {
 435                 if ((ret->version = (int)ASN1_INTEGER_get(params->version)) < 0)
 436                         OPENSSL_ECDSA_ABORT(ECDSA_R_UNEXPECTED_VERSION_NUMER)
 437         }
 438         else
 439                 ret->version  = 1;
 440         if (params->order && params->cofactor && params->base && params->base->data)
 441         {
 442                 if ((tmp_1 = ASN1_INTEGER_to_BN(params->order, tmp_1)) == NULL)
 443                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 444                 if ((tmp_2 = ASN1_INTEGER_to_BN(params->cofactor, tmp_2)) == NULL)
 445                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 446                 if (!EC_POINT_oct2point(ret->group, point, params->base->data,
 447                                 params->base->length, NULL)) goto err;
 448                 if (!EC_GROUP_set_generator(ret->group, point, tmp_1, tmp_2)) goto err;
 449         }
 450         ok = 1;
 451
 452 err:    if (!ok)
 453         {
 454                 ECDSAerr(ECDSA_F_ECDSA_GET, reason);
 455                 if (ret && !ecdsa) ECDSA_free(ret);
 456                 ret = NULL;
 457         }
 458         if (tmp_1)      BN_free(tmp_1);
 459         if (tmp_2)      BN_free(tmp_2);
 460         if (tmp_3)      BN_free(tmp_3);
 461         if (point)      EC_POINT_free(point);
 462         return(ret);
 463 }
 464
 465 ECDSA *ECDSA_ecparameters2ecdsa(const EC_PARAMETERS *params, ECDSA *ecdsa)
 466 {
 467         ECDSA *ret = ecdsa;
 468         int tmp = 0;
 469         if (ret == NULL)
 470                 if ((ret = ECDSA_new()) == NULL)
 471                 {
 472                         ECDSAerr(ECDSA_F_ECDSA_GET_ECDSA, ERR_R_MALLOC_FAILURE);
 473                         return NULL;
 474                 }
 475         if (params == NULL)
 476         {
 477                 ECDSAerr(ECDSA_F_ECDSA_GET_ECDSA, ECDSA_R_MISSING_PARAMETERS);
 478                 ECDSA_free(ret);
 479                 return NULL;
 480         }
 481         if (params->type == 0)
 482         {
 483                 if (ret->group)
 484                         EC_GROUP_free(ret->group);
 485                 tmp = OBJ_obj2nid(params->value.named_curve);
 486                 ret->parameter_flags |= ECDSA_FLAG_NAMED_CURVE;
 487                 if ((ret->group = EC_GROUP_new_by_name(tmp)) == NULL)
 488                 {
 489                         ECDSAerr(ECDSA_F_ECDSA_GET_ECDSA, ECDSA_R_EC_GROUP_NID2CURVE_FAILURE);
 490                         ECDSA_free(ret);
 491                         return NULL;
 492                 }
 493         }
 494         else if (params->type == 1)
 495         {
 496                 ret = ECDSA_x9_62parameters2ecdsa(params->value.parameters, ret);
 497         }
 498         else if (params->type == 2)
 499         {
 500                 if (ret->group)
 501                         EC_GROUP_free(ret->group);
 502                 ret->group = NULL;
 503                 ret->parameter_flags |= ECDSA_FLAG_IMPLICITLYCA;
 504         }
 505         else
 506         {
 507                 ECDSAerr(ECDSA_F_ECDSA_GET_ECDSA, ECDSA_R_UNKNOWN_PARAMETERS_TYPE);
 508                 ECDSA_free(ret);
 509                 ret = NULL;
 510         }
 511         return ret;
 512 }
 513
 514 ECDSA   *d2i_ECDSAParameters(ECDSA **a, const unsigned char **in, long len)
 515 {
 516         ECDSA           *ecdsa = (a && *a)? *a : NULL;
 517         EC_PARAMETERS   *params = NULL;
 518
 519         if ((params = d2i_EC_PARAMETERS(NULL, in, len)) == NULL)
 520         {
 521                 ECDSAerr(ECDSA_F_D2I_ECDSAPARAMETERS, ECDSA_R_D2I_EC_PARAMETERS_FAILURE);
 522                 EC_PARAMETERS_free(params);
 523                 return NULL;
 524         }
 525         if ((ecdsa = ECDSA_ecparameters2ecdsa(params, ecdsa)) == NULL)
 526         {
 527                 ECDSAerr(ECDSA_F_D2I_ECDSAPARAMETERS, ECDSA_R_ECPARAMETERS2ECDSA_FAILURE);
 528                 return NULL;
 529         }
 530         EC_PARAMETERS_free(params);
 531         return(ecdsa);
 532 }
 533
 534 int     i2d_ECDSAParameters(ECDSA *a, unsigned char **out)
 535 {
 536         int             ret=0;
 537         EC_PARAMETERS   *tmp = ECDSA_get_EC_PARAMETERS(a, NULL);
 538         if (tmp == NULL)
 539         {
 540                 ECDSAerr(ECDSA_F_I2D_ECDSAPARAMETERS, ECDSA_R_ECDSA_GET_EC_PARAMETERS_FAILURE);
 541                 return 0;
 542         }
 543         if ((ret = i2d_EC_PARAMETERS(tmp, out)) == 0)
 544         {
 545                 ECDSAerr(ECDSA_F_I2D_ECDSAPARAMETERS, ECDSA_R_ECDSA_R_D2I_EC_PARAMETERS_FAILURE);
 546                 EC_PARAMETERS_free(tmp);
 547                 return 0;
 548         }
 549         EC_PARAMETERS_free(tmp);
 550         return(ret);
 551 }
 552
 553 ECDSA   *d2i_ECDSAPrivateKey(ECDSA **a, const unsigned char **in, long len)
 554 {
 555         int reason=ERR_R_BN_LIB, ok=0;
 556         ECDSA *ret=NULL;
 557         ECDSAPrivateKey *priv_key=NULL;
 558
 559         if ((priv_key = ECDSAPrivateKey_new()) == NULL)
 560                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSAPRIVATEKEY_NEW_FAILURE)
 561         if ((priv_key = d2i_ecdsaPrivateKey(&priv_key, in, len)) == NULL)
 562                 OPENSSL_ECDSA_ABORT(ECDSA_R_D2I_ECDSA_PRIVATEKEY_FAILURE)
 563         if ((ret = ECDSA_ecparameters2ecdsa(priv_key->parameters, NULL)) == NULL)
 564                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_FAILURE)
 565         ret->version = priv_key->version;
 566         if (priv_key->priv_key)
 567         {
 568                 if ((ret->priv_key = BN_dup(priv_key->priv_key)) == NULL)
 569                         OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 570         }
 571         else
 572                 OPENSSL_ECDSA_ABORT(ECDSA_R_D2I_ECDSAPRIVATEKEY_MISSING_PRIVATE_KEY)
 573         if ((ret->pub_key = EC_POINT_new(ret->group)) == NULL)
 574                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 575         if (!EC_POINT_oct2point(ret->group, ret->pub_key, priv_key->pub_key->data, priv_key->pub_key->length, NULL))
 576                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 577         ok = 1;
 578 err :   if (!ok)
 579         {
 580                 if (ret) ECDSA_free(ret);
 581                 ret = NULL;
 582                 ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, reason);
 583         }
 584         if (priv_key)   ECDSAPrivateKey_free(priv_key);
 585         return(ret);
 586 }
 587
 588 int     i2d_ECDSAPrivateKey(ECDSA *a, unsigned char **out)
 589 {
 590         int ret=0, ok=0, reason=ERR_R_EC_LIB;
 591         unsigned char   *buffer=NULL;
 592         size_t          buf_len=0;
 593         ECDSAPrivateKey *priv_key=NULL;
 594
 595         if (a == NULL || a->group == NULL)
 596                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 597         if ((priv_key = ECDSAPrivateKey_new()) == NULL)
 598                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSAPRIVATEKEY_NEW_FAILURE)
 599         if ((priv_key->parameters = ECDSA_get_EC_PARAMETERS(a, priv_key->parameters)) == NULL)
 600                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_X9_62_EC_PARAMETERS_FAILURE)
 601         priv_key->version      = a->version;
 602         if (BN_copy(priv_key->priv_key, a->priv_key) == NULL)
 603                 OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 604         buf_len = EC_POINT_point2oct(a->group, a->pub_key, POINT_CONVERSION_COMPRESSED, NULL, 0, NULL);
 605         if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
 606                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 607         if (!EC_POINT_point2oct(a->group, a->pub_key, POINT_CONVERSION_COMPRESSED,
 608                                 buffer, buf_len, NULL)) goto err;
 609         if (!M_ASN1_OCTET_STRING_set(priv_key->pub_key, buffer, buf_len))
 610                 OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 611         if ((ret = i2d_ecdsaPrivateKey(priv_key, out)) == 0)
 612                 OPENSSL_ECDSA_ABORT(ECDSA_R_I2D_ECDSA_PRIVATEKEY)
 613         ok=1;
 614
 615 err:    if (!ok)
 616                 ECDSAerr(ECDSA_F_I2D_ECDSAPRIVATEKEY, reason);
 617         if (buffer)   OPENSSL_free(buffer);
 618         if (priv_key) ECDSAPrivateKey_free(priv_key);
 619         return(ok?ret:0);
 620 }
 621
 622
 623 ECDSA   *ECDSAPublicKey_set_octet_string(ECDSA **a, const unsigned char **in, long len)
 624 {
 625         ECDSA *ret=NULL;
 626
 627         if (a == NULL || (*a) == NULL || (*a)->group == NULL)
 628         {
 629                 /* sorry, but a EC_GROUP-structur is necessary
 630                  * to set the public key */
 631                 ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, ECDSA_R_MISSING_PARAMETERS);
 632                 return 0;
 633         }
 634         ret = *a;
 635         if (ret->pub_key == NULL && (ret->pub_key = EC_POINT_new(ret->group)) == NULL)
 636         {
 637                 ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, ERR_R_MALLOC_FAILURE);
 638                 return 0;
 639         }
 640         if (!EC_POINT_oct2point(ret->group, ret->pub_key, *in, len, NULL))
 641         {
 642                 ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, ERR_R_EC_LIB);
 643                 return 0;
 644         }
 645         ECDSA_set_conversion_form(ret, (point_conversion_form_t)(*in[0] & ~0x01));
 646         return ret;
 647 }
 648
 649 int     ECDSAPublicKey_get_octet_string(ECDSA *a, unsigned char **out)
 650 {
 651         size_t  buf_len=0;
 652
 653         if (a == NULL)
 654         {
 655                 ECDSAerr(ECDSA_F_I2D_ECDSAPUBLICKEY, ECDSA_R_MISSING_PARAMETERS);
 656                 return 0;
 657         }
 658         buf_len = EC_POINT_point2oct(a->group, a->pub_key, ECDSA_get_conversion_form(a), NULL, 0, NULL);
 659         if (out == NULL || buf_len == 0)
 660         /* out == NULL => just return the length of the octet string */
 661                 return buf_len;
 662         if (*out == NULL)
 663                 if ((*out = OPENSSL_malloc(buf_len)) == NULL)
 664                 {
 665                         ECDSAerr(ECDSA_F_I2D_ECDSAPUBLICKEY, ERR_R_MALLOC_FAILURE);
 666                         return 0;
 667                 }
 668         if (!EC_POINT_point2oct(a->group, a->pub_key, ECDSA_get_conversion_form(a),
 669                                 *out, buf_len, NULL))
 670         {
 671                 ECDSAerr(ECDSA_F_I2D_ECDSAPUBLICKEY, ERR_R_EC_LIB);
 672                 OPENSSL_free(*out);
 673                 *out = NULL;
 674                 return 0;
 675         }
 676         return buf_len;
 677 }