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 static point_conversion_form_t POINT_CONVERSION_FORM = POINT_CONVERSION_COMPRESSED;
  63
  64 ASN1_SEQUENCE(ECDSA_SIG) = {
  65         ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM),
  66         ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM)
  67 } ASN1_SEQUENCE_END(ECDSA_SIG)
  68
  69 IMPLEMENT_ASN1_FUNCTIONS_const(ECDSA_SIG)
  70
  71 ASN1_SEQUENCE(X9_62_FIELDID) = {
  72         ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
  73         ASN1_SIMPLE(X9_62_FIELDID, parameters, ASN1_ANY)
  74 } ASN1_SEQUENCE_END(X9_62_FIELDID)
  75
  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 IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_CURVE)
  85
  86 ASN1_SEQUENCE(X9_62_EC_PARAMETERS) = {
  87         ASN1_OPT(X9_62_EC_PARAMETERS, version, ASN1_INTEGER),
  88         ASN1_SIMPLE(X9_62_EC_PARAMETERS, fieldID, X9_62_FIELDID),
  89         ASN1_SIMPLE(X9_62_EC_PARAMETERS, curve, X9_62_CURVE),
  90         ASN1_SIMPLE(X9_62_EC_PARAMETERS, base, ASN1_OCTET_STRING),
  91         ASN1_SIMPLE(X9_62_EC_PARAMETERS, order, ASN1_INTEGER),
  92         ASN1_SIMPLE(X9_62_EC_PARAMETERS, cofactor, ASN1_INTEGER)
  93 } ASN1_SEQUENCE_END(X9_62_EC_PARAMETERS)
  94
  95 IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_EC_PARAMETERS)
  96
  97 ASN1_CHOICE(EC_PARAMETERS) = {
  98         ASN1_SIMPLE(EC_PARAMETERS, value.named_curve, ASN1_OBJECT),
  99         ASN1_SIMPLE(EC_PARAMETERS, value.parameters, X9_62_EC_PARAMETERS),
 100         ASN1_SIMPLE(EC_PARAMETERS, value.implicitlyCA, ASN1_NULL)
 101 } ASN1_CHOICE_END(EC_PARAMETERS)
 102
 103 IMPLEMENT_ASN1_FUNCTIONS_const(EC_PARAMETERS)
 104
 105 ASN1_SEQUENCE(ECDSAPrivateKey) = {
 106         ASN1_SIMPLE(ECDSAPrivateKey, version, LONG),
 107         ASN1_SIMPLE(ECDSAPrivateKey, parameters, EC_PARAMETERS),
 108         ASN1_SIMPLE(ECDSAPrivateKey, pub_key, ASN1_OCTET_STRING),
 109         ASN1_SIMPLE(ECDSAPrivateKey, priv_key, BIGNUM)
 110 } ASN1_SEQUENCE_END(ECDSAPrivateKey)
 111
 112 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(ECDSAPrivateKey, ECDSAPrivateKey, ECDSAPrivateKey)
 113 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSAPrivateKey, ECDSAPrivateKey, ecdsaPrivateKey)
 114
 115 ASN1_SEQUENCE(ecdsa_pub_internal) = {
 116         ASN1_SIMPLE(ECDSAPrivateKey, pub_key, ASN1_OCTET_STRING),
 117         ASN1_SIMPLE(ECDSAPrivateKey, parameters, EC_PARAMETERS),
 118 } ASN1_SEQUENCE_END_name(ECDSAPrivateKey, ecdsa_pub_internal)
 119
 120 ASN1_CHOICE(ECDSAPublicKey) = {
 121         ASN1_SIMPLE(ECDSAPrivateKey, pub_key, ASN1_OCTET_STRING),
 122         ASN1_EX_COMBINE(0, 0, ecdsa_pub_internal)
 123 } ASN1_CHOICE_END_selector(ECDSAPrivateKey, ECDSAPublicKey, write_params)
 124
 125 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSAPrivateKey, ECDSAPublicKey, ecdsaPublicKey)
 126
 127
 128 X9_62_FIELDID   *ECDSA_get_X9_62_FIELDID(const ECDSA *ecdsa, X9_62_FIELDID *field)
 129 {
 130         /* TODO : characteristic two */
 131         int     ok=0, reason=ERR_R_ASN1_LIB;
 132         X9_62_FIELDID *ret=NULL;
 133         BIGNUM  *tmp=NULL;
 134
 135         if (!ecdsa || !ecdsa->group)
 136                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 137         if (field == NULL)
 138         {
 139                 if ((ret = X9_62_FIELDID_new()) == NULL) return NULL;
 140         }
 141         else
 142         {
 143                 ret = field;
 144                 if (ret->fieldType != NULL)     ASN1_OBJECT_free(ret->fieldType);
 145                 if (ret->parameters != NULL)    ASN1_TYPE_free(ret->parameters);
 146         }
 147         if ((tmp = BN_new()) == NULL)
 148                 OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 149         if ((ret->fieldType = OBJ_nid2obj(NID_X9_62_prime_field)) == NULL)
 150                 OPENSSL_ECDSA_ABORT(ERR_R_OBJ_LIB)
 151         if ((ret->parameters = ASN1_TYPE_new()) == NULL) goto err;
 152         ret->parameters->type = V_ASN1_INTEGER;
 153         if (!EC_GROUP_get_curve_GFp(ecdsa->group, tmp, NULL, NULL, NULL))
 154                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 155         if ((ret->parameters->value.integer = BN_to_ASN1_INTEGER(tmp, NULL)) == NULL) goto err;
 156         ok = 1;
 157 err :   if (!ok)
 158         {
 159                 if (ret && !field) X9_62_FIELDID_free(ret);
 160                 ret = NULL;
 161                 ECDSAerr(ECDSA_F_ECDSA_GET_X9_62_FIELDID, reason);
 162         }
 163         if (tmp) BN_free(tmp);
 164         return(ret);
 165 }
 166
 167 X9_62_CURVE   *ECDSA_get_X9_62_CURVE(const ECDSA *ecdsa, X9_62_CURVE *curve)
 168 {
 169         int     ok=0, reason=ERR_R_BN_LIB, len1=0, len2=0;
 170         X9_62_CURVE *ret=NULL;
 171         BIGNUM      *tmp1=NULL, *tmp2=NULL;
 172         unsigned char *buffer=NULL;
 173
 174         if (!ecdsa || !ecdsa->group)
 175                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 176         if ((tmp1 = BN_new()) == NULL || (tmp2 = BN_new()) == NULL) goto err;
 177         if (curve == NULL)
 178         {
 179                 if ((ret = X9_62_CURVE_new()) == NULL)
 180                         OPENSSL_ECDSA_ABORT(ECDSA_R_X9_62_CURVE_NEW_FAILURE)
 181         }
 182         else
 183         {
 184                 ret = curve;
 185                 if (ret->a)     ASN1_OCTET_STRING_free(ret->a);
 186                 if (ret->b)     ASN1_OCTET_STRING_free(ret->b);
 187                 if (ret->seed)  ASN1_BIT_STRING_free(ret->seed);
 188         }
 189         if (!EC_GROUP_get_curve_GFp(ecdsa->group, NULL, tmp1, tmp2, NULL))
 190                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 191
 192         if ((len1 = BN_num_bytes(tmp1)) == 0)
 193                 OPENSSL_ECDSA_ABORT(ECDSA_R_UNEXPECTED_PARAMETER_LENGTH)
 194         if ((buffer = OPENSSL_malloc(len1)) == NULL)
 195                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 196         if ((len1 = BN_bn2bin(tmp1, buffer)) == 0) goto err;
 197         if ((ret->a = M_ASN1_OCTET_STRING_new()) == NULL)
 198                 OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 199         if (!M_ASN1_OCTET_STRING_set(ret->a, buffer, len1))
 200                 OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 201
 202         if ((len2 = BN_num_bytes(tmp2)) == 0)
 203                 OPENSSL_ECDSA_ABORT(ECDSA_R_UNEXPECTED_PARAMETER_LENGTH)
 204         if (len1 < len2)
 205         {
 206                 OPENSSL_free(buffer);
 207                 if ((buffer = OPENSSL_malloc(len2)) == NULL)
 208                         OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 209         }
 210         if ((len2 = BN_bn2bin(tmp2, buffer)) == 0) goto err;
 211         if ((ret->b = M_ASN1_OCTET_STRING_new()) == NULL)
 212                 OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 213         if (!M_ASN1_OCTET_STRING_set(ret->b, buffer, len2))
 214                 OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 215
 216         if (ecdsa->seed)
 217         {
 218                 if ((ret->seed = ASN1_BIT_STRING_new()) == NULL) goto err;
 219                 if (!ASN1_BIT_STRING_set(ret->seed, ecdsa->seed, (int)ecdsa->seed_len))
 220                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 221         }
 222         else
 223                 ret->seed = NULL;
 224
 225         ok = 1;
 226 err :   if (!ok)
 227         {
 228                 if (ret && !curve) X9_62_CURVE_free(ret);
 229                 ret = NULL;
 230                 ECDSAerr(ECDSA_F_ECDSA_GET_X9_62_CURVE, reason);
 231         }
 232         if (buffer) OPENSSL_free(buffer);
 233         if (tmp1)   BN_free(tmp1);
 234         if (tmp2)   BN_free(tmp2);
 235         return(ret);
 236 }
 237
 238 X9_62_EC_PARAMETERS *ECDSA_get_X9_62_EC_PARAMETERS(const ECDSA *ecdsa, X9_62_EC_PARAMETERS *param)
 239 {
 240         int     ok=0, reason=ERR_R_ASN1_LIB;
 241         size_t  len=0;
 242         X9_62_EC_PARAMETERS *ret=NULL;
 243         BIGNUM        *tmp=NULL;
 244         unsigned char *buffer=NULL;
 245         EC_POINT      *point=NULL;
 246
 247         if (!ecdsa || !ecdsa->group)
 248                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 249         if ((tmp = BN_new()) == NULL)
 250                 OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 251         if (param == NULL)
 252         {
 253                 if ((ret = X9_62_EC_PARAMETERS_new()) == NULL)
 254                         OPENSSL_ECDSA_ABORT(ECDSA_R_X9_62_EC_PARAMETERS_NEW_FAILURE)
 255         }
 256         else
 257                 ret = param;
 258         if (ecdsa->version == 1)
 259                 ret->version = NULL;
 260         else
 261         {
 262                 if (ret->version == NULL && (ret->version = ASN1_INTEGER_new()) == NULL)
 263                         OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 264                 if (!ASN1_INTEGER_set(ret->version, (long)ecdsa->version)) goto err;
 265         }
 266         if ((ret->fieldID = ECDSA_get_X9_62_FIELDID(ecdsa, ret->fieldID)) == NULL)
 267                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_X9_62_FIELDID_FAILURE)
 268         if ((ret->curve = ECDSA_get_X9_62_CURVE(ecdsa, ret->curve)) == NULL)
 269                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_X9_62_CURVE_FAILURE)
 270         if ((point = EC_GROUP_get0_generator(ecdsa->group)) == NULL)
 271                 OPENSSL_ECDSA_ABORT(ECDSA_R_CAN_NOT_GET_GENERATOR)
 272         if (!(len = EC_POINT_point2oct(ecdsa->group, point, POINT_CONVERSION_COMPRESSED, NULL, len, NULL)))
 273                 OPENSSL_ECDSA_ABORT(ECDSA_R_UNEXPECTED_PARAMETER_LENGTH)
 274         if ((buffer = OPENSSL_malloc(len)) == NULL)
 275                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 276         if (!EC_POINT_point2oct(ecdsa->group, point, POINT_CONVERSION_COMPRESSED, buffer, len, NULL))
 277                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 278         if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL)
 279                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 280         if (!ASN1_OCTET_STRING_set(ret->base, buffer, len)) goto err;
 281         if (!EC_GROUP_get_order(ecdsa->group, tmp, NULL))
 282                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 283         if ((ret->order = BN_to_ASN1_INTEGER(tmp, ret->order)) == NULL) goto err;
 284         if (!EC_GROUP_get_cofactor(ecdsa->group, tmp, NULL))
 285                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 286         if ((ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor)) == NULL) goto err;
 287         ok = 1;
 288
 289 err :   if(!ok)
 290         {
 291                 ECDSAerr(ECDSA_F_ECDSA_GET_X9_62_EC_PARAMETERS, reason);
 292                 if (ret && !param) X9_62_EC_PARAMETERS_free(ret);
 293                 ret = NULL;
 294         }
 295         if (tmp)    BN_free(tmp);
 296         if (buffer) OPENSSL_free(buffer);
 297         return(ret);
 298 }
 299
 300 EC_PARAMETERS *ECDSA_get_EC_PARAMETERS(const ECDSA *ecdsa, EC_PARAMETERS *params)
 301 {
 302         int ok = 1;
 303         int tmp = 0;
 304         EC_PARAMETERS *ret = params;
 305         if (ret == NULL)
 306                 if ((ret = EC_PARAMETERS_new()) == NULL)
 307                 {
 308                         ECDSAerr(ECDSA_F_ECDSA_GET_EC_PARAMETERS, ERR_R_MALLOC_FAILURE);
 309                         return NULL;
 310                 }
 311         if (ecdsa == NULL)
 312         {       /* missing parameter */
 313                 ECDSAerr(ECDSA_F_ECDSA_GET_EC_PARAMETERS, ECDSA_R_MISSING_PARAMETERS);
 314                 EC_PARAMETERS_free(params);
 315                 return NULL;
 316         }
 317         if (ecdsa->parameter_flags & ECDSA_FLAG_NAMED_CURVE)
 318         {       /* use a named curve */
 319                 tmp = EC_GROUP_get_nid(ecdsa->group);
 320                 if (tmp)
 321                 {
 322                         ret->type = 0;
 323                         if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
 324                                 ok = 0;
 325                 }
 326                 else
 327                 {
 328                         /* use the x9_64 ec_parameters structure */
 329                         ret->type = 1;
 330                         if ((ret->value.parameters = ECDSA_get_X9_62_EC_PARAMETERS(ecdsa, NULL)) == NULL)
 331                                 ok = 0;
 332                 }
 333         }
 334         else if (ecdsa->parameter_flags & ECDSA_FLAG_IMPLICITLYCA)
 335         {       /* use implicitlyCA */
 336                 ret->type = 2;
 337                 if ((ret->value.implicitlyCA = ASN1_NULL_new()) == NULL)
 338                         ok = 0;
 339         }
 340         else
 341         {       /* use the x9_64 ec_parameters structure */
 342                 ret->type = 1;
 343                 if ((ret->value.parameters = ECDSA_get_X9_62_EC_PARAMETERS(ecdsa, NULL)) == NULL)
 344                         ok = 0;
 345         }
 346         if (!ok)
 347         {
 348                 EC_PARAMETERS_free(ret);
 349                 return NULL;
 350         }
 351                 return ret;
 352 }
 353
 354 ECDSA         *ECDSA_x9_62parameters2ecdsa(const X9_62_EC_PARAMETERS *params, ECDSA *ecdsa)
 355 {
 356         int       ok=0, reason=ERR_R_EC_LIB, tmp;
 357         ECDSA     *ret=NULL;
 358         EC_METHOD *meth=NULL;
 359         BIGNUM    *tmp_1=NULL, *tmp_2=NULL, *tmp_3=NULL;
 360         EC_POINT  *point=NULL;
 361
 362         if (!params)
 363                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 364         if (ecdsa == NULL)
 365         {
 366                 if ((ret = ECDSA_new()) == NULL)
 367                         OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_NEW_FAILURE)
 368         }
 369         else
 370         {
 371                 if (ecdsa->group)       EC_GROUP_free(ecdsa->group);
 372                 if (ecdsa->pub_key)     EC_POINT_free(ecdsa->pub_key);
 373                 ecdsa->pub_key = NULL;
 374                 if (ecdsa->priv_key)    BN_clear_free(ecdsa->priv_key);
 375                 ecdsa->priv_key = NULL;
 376                 if (ecdsa->seed)        OPENSSL_free(ecdsa->seed);
 377                 ecdsa->seed = NULL;
 378                 if (ecdsa->kinv)
 379                 {
 380                         BN_clear_free(ecdsa->kinv);
 381                         ecdsa->kinv = NULL;
 382                 }
 383                 if (ecdsa->r)
 384                 {
 385                         BN_clear_free(ecdsa->r);
 386                         ecdsa->r = NULL;
 387                 }
 388                 ret = ecdsa;
 389         }
 390         /* TODO : characteristic two */
 391         if (!params->fieldID || !params->fieldID->fieldType || !params->fieldID->parameters)
 392                 OPENSSL_ECDSA_ABORT(ECDSA_R_NO_FIELD_SPECIFIED)
 393         tmp = OBJ_obj2nid(params->fieldID->fieldType);
 394         if (tmp == NID_X9_62_characteristic_two_field)
 395         {
 396                 OPENSSL_ECDSA_ABORT(ECDSA_R_NOT_SUPPORTED)
 397         }
 398         else if (tmp == NID_X9_62_prime_field)
 399         {
 400                 /* TODO : optimal method for the curve */
 401                 (const EC_METHOD *)meth = EC_GFp_mont_method();
 402                 if ((ret->group = EC_GROUP_new(meth)) == NULL) goto err;
 403                 if (params->fieldID->parameters->type != V_ASN1_INTEGER)
 404                         OPENSSL_ECDSA_ABORT(ECDSA_R_UNEXPECTED_ASN1_TYPE)
 405                 if (!params->fieldID->parameters->value.integer)
 406                         OPENSSL_ECDSA_ABORT(ECDSA_R_PRIME_MISSING)
 407                 if ((tmp_1 = ASN1_INTEGER_to_BN(params->fieldID->parameters->value.integer, NULL)) == NULL)
 408                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 409                 if (!params->curve)
 410                         OPENSSL_ECDSA_ABORT(ECDSA_R_NO_CURVE_SPECIFIED)
 411                 if (!params->curve->a || !params->curve->a->data)
 412                         OPENSSL_ECDSA_ABORT(ECDSA_R_NO_CURVE_PARAMETER_A_SPECIFIED)
 413                 if ((tmp_2 = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL)) == NULL)
 414                         OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 415                 if (!params->curve->b || !params->curve->b->data)
 416                         OPENSSL_ECDSA_ABORT(ECDSA_R_NO_CURVE_PARAMETER_B_SPECIFIED)
 417                 if ((tmp_3 = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL)) == NULL)
 418                         OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 419                 if (!EC_GROUP_set_curve_GFp(ret->group, tmp_1, tmp_2, tmp_3, NULL)) goto err;
 420                 if ((point = EC_POINT_new(ret->group)) == NULL) goto err;
 421         }
 422         else OPENSSL_ECDSA_ABORT(ECDSA_R_WRONG_FIELD_IDENTIFIER)
 423         if (params->curve->seed != NULL)
 424         {
 425                 if (ret->seed != NULL)
 426                         OPENSSL_free(ret->seed);
 427                 if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL)
 428                         OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 429                 memcpy(ret->seed, params->curve->seed->data, params->curve->seed->length);
 430                 ret->seed_len = params->curve->seed->length;
 431         }
 432         if (params->version)
 433         {
 434                 if ((ret->version = (int)ASN1_INTEGER_get(params->version)) < 0)
 435                         OPENSSL_ECDSA_ABORT(ECDSA_R_UNEXPECTED_VERSION_NUMER)
 436         }
 437         else
 438                 ret->version  = 1;
 439         if (params->order && params->cofactor && params->base && params->base->data)
 440         {
 441                 if ((tmp_1 = ASN1_INTEGER_to_BN(params->order, tmp_1)) == NULL)
 442                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 443                 if ((tmp_2 = ASN1_INTEGER_to_BN(params->cofactor, tmp_2)) == NULL)
 444                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 445                 if (!EC_POINT_oct2point(ret->group, point, params->base->data,
 446                                 params->base->length, NULL)) goto err;
 447                 if (!EC_GROUP_set_generator(ret->group, point, tmp_1, tmp_2)) goto err;
 448         }
 449         ok = 1;
 450
 451 err:    if (!ok)
 452         {
 453                 ECDSAerr(ECDSA_F_ECDSA_GET, reason);
 454                 if (ret && !ecdsa) ECDSA_free(ret);
 455                 ret = NULL;
 456         }
 457         if (tmp_1)      BN_free(tmp_1);
 458         if (tmp_2)      BN_free(tmp_2);
 459         if (tmp_3)      BN_free(tmp_3);
 460         if (point)      EC_POINT_free(point);
 461         return(ret);
 462 }
 463
 464 ECDSA *ECDSA_ecparameters2ecdsa(const EC_PARAMETERS *params, ECDSA *ecdsa)
 465 {
 466         ECDSA *ret = ecdsa;
 467         int tmp = 0;
 468         if (ret == NULL)
 469                 if ((ret = ECDSA_new()) == NULL)
 470                 {
 471                         ECDSAerr(ECDSA_F_ECDSA_GET_ECDSA, ERR_R_MALLOC_FAILURE);
 472                         return NULL;
 473                 }
 474         if (params == NULL)
 475         {
 476                 ECDSAerr(ECDSA_F_ECDSA_GET_ECDSA, ECDSA_R_MISSING_PARAMETERS);
 477                 ECDSA_free(ret);
 478                 return NULL;
 479         }
 480         if (params->type == 0)
 481         {
 482                 if (ret->group)
 483                         EC_GROUP_free(ret->group);
 484                 tmp = OBJ_obj2nid(params->value.named_curve);
 485                 ret->parameter_flags |= ECDSA_FLAG_NAMED_CURVE;
 486                 if ((ret->group = EC_GROUP_new_by_name(tmp)) == NULL)
 487                 {
 488                         ECDSAerr(ECDSA_F_ECDSA_GET_ECDSA, ECDSA_R_EC_GROUP_NID2CURVE_FAILURE);
 489                         ECDSA_free(ret);
 490                         return NULL;
 491                 }
 492         }
 493         else if (params->type == 1)
 494         {
 495                 ret = ECDSA_x9_62parameters2ecdsa(params->value.parameters, ret);
 496         }
 497         else if (params->type == 2)
 498         {
 499                 if (ret->group)
 500                         EC_GROUP_free(ret->group);
 501                 ret->group = NULL;
 502                 ret->parameter_flags |= ECDSA_FLAG_IMPLICITLYCA;
 503         }
 504         else
 505         {
 506                 ECDSAerr(ECDSA_F_ECDSA_GET_ECDSA, ECDSA_R_UNKNOWN_PARAMETERS_TYPE);
 507                 ECDSA_free(ret);
 508                 ret = NULL;
 509         }
 510         return ret;
 511 }
 512
 513 ECDSA   *d2i_ECDSAParameters(ECDSA **a, const unsigned char **in, long len)
 514 {
 515         ECDSA           *ecdsa = (a && *a)? *a : NULL;
 516         EC_PARAMETERS   *params = NULL;
 517
 518         if ((params = d2i_EC_PARAMETERS(NULL, in, len)) == NULL)
 519         {
 520                 ECDSAerr(ECDSA_F_D2I_ECDSAPARAMETERS, ECDSA_R_D2I_EC_PARAMETERS_FAILURE);
 521                 EC_PARAMETERS_free(params);
 522                 return NULL;
 523         }
 524         if ((ecdsa = ECDSA_ecparameters2ecdsa(params, ecdsa)) == NULL)
 525         {
 526                 ECDSAerr(ECDSA_F_D2I_ECDSAPARAMETERS, ECDSA_R_ECPARAMETERS2ECDSA_FAILURE);
 527                 return NULL;
 528         }
 529         EC_PARAMETERS_free(params);
 530         return(ecdsa);
 531 }
 532
 533 int     i2d_ECDSAParameters(ECDSA *a, unsigned char **out)
 534 {
 535         int             ret=0;
 536         EC_PARAMETERS   *tmp = ECDSA_get_EC_PARAMETERS(a, NULL);
 537         if (tmp == NULL)
 538         {
 539                 ECDSAerr(ECDSA_F_I2D_ECDSAPARAMETERS, ECDSA_R_ECDSA_GET_EC_PARAMETERS_FAILURE);
 540                 return 0;
 541         }
 542         if ((ret = i2d_EC_PARAMETERS(tmp, out)) == 0)
 543         {
 544                 ECDSAerr(ECDSA_F_I2D_ECDSAPARAMETERS, ECDSA_R_ECDSA_R_D2I_EC_PARAMETERS_FAILURE);
 545                 EC_PARAMETERS_free(tmp);
 546                 return 0;
 547         }
 548         EC_PARAMETERS_free(tmp);
 549         return(ret);
 550 }
 551
 552 ECDSA   *d2i_ECDSAPrivateKey(ECDSA **a, const unsigned char **in, long len)
 553 {
 554         int reason=ERR_R_BN_LIB, ok=0;
 555         ECDSA *ret=NULL;
 556         ECDSAPrivateKey *priv_key=NULL;
 557
 558         if ((priv_key = ECDSAPrivateKey_new()) == NULL)
 559                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSAPRIVATEKEY_NEW_FAILURE)
 560         if ((priv_key = d2i_ecdsaPrivateKey(&priv_key, in, len)) == NULL)
 561                 OPENSSL_ECDSA_ABORT(ECDSA_R_D2I_ECDSA_PRIVATEKEY_FAILURE)
 562         if ((ret = ECDSA_ecparameters2ecdsa(priv_key->parameters, NULL)) == NULL)
 563                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_FAILURE)
 564         ret->version = priv_key->version;
 565         ret->write_params = priv_key->write_params;
 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   *d2i_ECDSAPublicKey(ECDSA **a, const unsigned char **in, long len)
 624 {
 625         int reason=ERR_R_BN_LIB, ok=0, ecdsa_new=1;
 626         ECDSA *ret=NULL;
 627         ECDSAPrivateKey *priv_key=NULL;
 628
 629         if (a && *a)
 630         {
 631                 ecdsa_new = 0;
 632                 ret = *a;
 633         }
 634         else if ((ret = ECDSA_new()) == NULL)
 635                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE);
 636         if ((priv_key = ECDSAPrivateKey_new()) == NULL)
 637                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSAPRIVATEKEY_NEW_FAILURE)
 638         if ((priv_key = d2i_ecdsaPublicKey(&priv_key, in, len)) == NULL)
 639                 OPENSSL_ECDSA_ABORT(ECDSA_R_D2I_ECDSA_PRIVATEKEY_FAILURE)
 640         if (priv_key->write_params == 0)
 641         {
 642                 if (ecdsa_new || !ret->group)
 643                         OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 644                 if (ret->pub_key == NULL && (ret->pub_key = EC_POINT_new(ret->group)) == NULL)
 645                         OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 646                 if (!EC_POINT_oct2point(ret->group, ret->pub_key, priv_key->pub_key->data,
 647                                         priv_key->pub_key->length, NULL))
 648                         OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 649         }
 650         else if (priv_key->write_params == 1)
 651         {
 652                 if ((ret = ECDSA_ecparameters2ecdsa(priv_key->parameters, ret)) == NULL)
 653                         OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_FAILURE)
 654                 if (ret->pub_key == NULL && (ret->pub_key = EC_POINT_new(ret->group)) == NULL)
 655                         OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 656                 if (!EC_POINT_oct2point(ret->group, ret->pub_key, priv_key->pub_key->data,
 657                                 priv_key->pub_key->length, NULL))
 658                         OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 659         }
 660         else    OPENSSL_ECDSA_ABORT(ECDSA_R_UNEXPECTED_PARAMETER)
 661         ret->write_params = 1;
 662         ok = 1;
 663 err :   if (!ok)
 664         {
 665                 if (ret && ecdsa_new) ECDSA_free(ret);
 666                 ret = NULL;
 667                 ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, reason);
 668         }
 669         if (priv_key)   ECDSAPrivateKey_free(priv_key);
 670         return(ret);
 671 }
 672
 673 int     i2d_ECDSAPublicKey(ECDSA *a, unsigned char **out)
 674 {
 675         int     ret=0, reason=ERR_R_EC_LIB, ok=0;
 676         unsigned char   *buffer=NULL;
 677         size_t          buf_len=0;
 678         ECDSAPrivateKey *priv_key=NULL;
 679
 680         if (a == NULL)
 681                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 682         if ((priv_key = ECDSAPrivateKey_new()) == NULL)
 683                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSAPRIVATEKEY_NEW_FAILURE)
 684         if ((priv_key->parameters = ECDSA_get_EC_PARAMETERS(a, priv_key->parameters)) == NULL)
 685                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_X9_62_EC_PARAMETERS_FAILURE)
 686         priv_key->version = a->version;
 687         priv_key->write_params = a->write_params;
 688         buf_len = EC_POINT_point2oct(a->group, a->pub_key, POINT_CONVERSION_FORM, NULL, 0, NULL);
 689         if (!buf_len || (buffer = OPENSSL_malloc(buf_len)) == NULL)
 690                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 691         if (!EC_POINT_point2oct(a->group, a->pub_key, POINT_CONVERSION_FORM,
 692                                 buffer, buf_len, NULL)) goto err;
 693         if (!M_ASN1_OCTET_STRING_set(priv_key->pub_key, buffer, buf_len))
 694                 OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 695         if ((ret = i2d_ecdsaPublicKey(priv_key, out)) == 0)
 696                 OPENSSL_ECDSA_ABORT(ECDSA_R_I2D_ECDSA_PUBLICKEY)
 697         ok = 1;
 698
 699 err:    if (!ok)
 700                 ECDSAerr(ECDSA_F_I2D_ECDSAPUBLICKEY, reason);
 701         if (buffer)   OPENSSL_free(buffer);
 702         if (priv_key) ECDSAPrivateKey_free(priv_key);
 703         return(ok?ret:0);
 704 }