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 DECLARE_ASN1_FUNCTIONS_const(X9_62_FIELDID)
  77 DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_FIELDID, X9_62_FIELDID)
  78 IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_FIELDID)
  79
  80 ASN1_SEQUENCE(X9_62_CURVE) = {
  81         ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING),
  82         ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING),
  83         ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING)
  84 } ASN1_SEQUENCE_END(X9_62_CURVE)
  85
  86 DECLARE_ASN1_FUNCTIONS_const(X9_62_CURVE)
  87 DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_CURVE, X9_62_CURVE)
  88 IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_CURVE)
  89
  90 ASN1_SEQUENCE(X9_62_EC_PARAMETERS) = {
  91         ASN1_OPT(X9_62_EC_PARAMETERS, version, ASN1_INTEGER),
  92         ASN1_SIMPLE(X9_62_EC_PARAMETERS, fieldID, X9_62_FIELDID),
  93         ASN1_SIMPLE(X9_62_EC_PARAMETERS, curve, X9_62_CURVE),
  94         ASN1_SIMPLE(X9_62_EC_PARAMETERS, base, ASN1_OCTET_STRING),
  95         ASN1_SIMPLE(X9_62_EC_PARAMETERS, order, ASN1_INTEGER),
  96         ASN1_SIMPLE(X9_62_EC_PARAMETERS, cofactor, ASN1_INTEGER)
  97 } ASN1_SEQUENCE_END(X9_62_EC_PARAMETERS)
  98
  99 DECLARE_ASN1_FUNCTIONS_const(X9_62_EC_PARAMETERS)
 100 DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_EC_PARAMETERS, X9_62_EC_PARAMETERS)
 101 IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_EC_PARAMETERS)
 102
 103 ASN1_CHOICE(EC_PARAMETERS) = {
 104         ASN1_SIMPLE(EC_PARAMETERS, value.named_curve, ASN1_OBJECT),
 105         ASN1_SIMPLE(EC_PARAMETERS, value.parameters, X9_62_EC_PARAMETERS),
 106         ASN1_SIMPLE(EC_PARAMETERS, value.implicitlyCA, ASN1_NULL)
 107 } ASN1_CHOICE_END(EC_PARAMETERS)
 108
 109 DECLARE_ASN1_FUNCTIONS_const(EC_PARAMETERS)
 110 DECLARE_ASN1_ENCODE_FUNCTIONS_const(EC_PARAMETERS, EC_PARAMETERS)
 111 IMPLEMENT_ASN1_FUNCTIONS_const(EC_PARAMETERS)
 112
 113 ASN1_SEQUENCE(ECDSAPrivateKey) = {
 114         ASN1_SIMPLE(ECDSAPrivateKey, version, LONG),
 115         ASN1_SIMPLE(ECDSAPrivateKey, parameters, EC_PARAMETERS),
 116         ASN1_SIMPLE(ECDSAPrivateKey, pub_key, ASN1_OCTET_STRING),
 117         ASN1_SIMPLE(ECDSAPrivateKey, priv_key, BIGNUM)
 118 } ASN1_SEQUENCE_END(ECDSAPrivateKey)
 119
 120 DECLARE_ASN1_FUNCTIONS_const(ECDSAPrivateKey)
 121 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSAPrivateKey, ecdsaPrivateKey)
 122 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(ECDSAPrivateKey, ECDSAPrivateKey, ECDSAPrivateKey)
 123 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSAPrivateKey, ECDSAPrivateKey, ecdsaPrivateKey)
 124
 125 ASN1_SEQUENCE(ecdsa_pub_internal) = {
 126         ASN1_SIMPLE(ECDSAPrivateKey, pub_key, ASN1_OCTET_STRING),
 127         ASN1_SIMPLE(ECDSAPrivateKey, parameters, EC_PARAMETERS),
 128 } ASN1_SEQUENCE_END_name(ECDSAPrivateKey, ecdsa_pub_internal)
 129
 130 ASN1_CHOICE(ECDSAPublicKey) = {
 131         ASN1_SIMPLE(ECDSAPrivateKey, pub_key, ASN1_OCTET_STRING),
 132         ASN1_EX_COMBINE(0, 0, ecdsa_pub_internal)
 133 } ASN1_CHOICE_END_selector(ECDSAPrivateKey, ECDSAPublicKey, write_params)
 134
 135 DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSAPrivateKey, ecdsaPublicKey)
 136 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSAPrivateKey, ECDSAPublicKey, ecdsaPublicKey)
 137
 138
 139 X9_62_FIELDID   *ECDSA_get_X9_62_FIELDID(const ECDSA *ecdsa, X9_62_FIELDID *field)
 140 {
 141         /* TODO : characteristic two */
 142         int     ok=0, reason=ERR_R_ASN1_LIB;
 143         X9_62_FIELDID *ret=NULL;
 144         BIGNUM  *tmp=NULL;
 145
 146         if (!ecdsa || !ecdsa->group)
 147                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 148         if (field == NULL)
 149         {
 150                 if ((ret = X9_62_FIELDID_new()) == NULL) return NULL;
 151         }
 152         else
 153         {
 154                 ret = field;
 155                 if (ret->fieldType != NULL)     ASN1_OBJECT_free(ret->fieldType);
 156                 if (ret->parameters != NULL)    ASN1_TYPE_free(ret->parameters);
 157         }
 158         if ((tmp = BN_new()) == NULL)
 159                 OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 160         if ((ret->fieldType = OBJ_nid2obj(NID_X9_62_prime_field)) == NULL)
 161                 OPENSSL_ECDSA_ABORT(ERR_R_OBJ_LIB)
 162         if ((ret->parameters = ASN1_TYPE_new()) == NULL) goto err;
 163         ret->parameters->type = V_ASN1_INTEGER;
 164         if (!EC_GROUP_get_curve_GFp(ecdsa->group, tmp, NULL, NULL, NULL))
 165                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 166         if ((ret->parameters->value.integer = BN_to_ASN1_INTEGER(tmp, NULL)) == NULL) goto err;
 167         ok = 1;
 168 err :   if (!ok)
 169         {
 170                 if (ret && !field) X9_62_FIELDID_free(ret);
 171                 ret = NULL;
 172                 ECDSAerr(ECDSA_F_ECDSA_GET_X9_62_FIELDID, reason);
 173         }
 174         if (tmp) BN_free(tmp);
 175         return(ret);
 176 }
 177
 178 X9_62_CURVE   *ECDSA_get_X9_62_CURVE(const ECDSA *ecdsa, X9_62_CURVE *curve)
 179 {
 180         int     ok=0, reason=ERR_R_BN_LIB, len1=0, len2=0;
 181         X9_62_CURVE *ret=NULL;
 182         BIGNUM      *tmp1=NULL, *tmp2=NULL;
 183         unsigned char *buffer=NULL;
 184         unsigned char char_buf = 0;
 185
 186         if (!ecdsa || !ecdsa->group)
 187                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 188         if ((tmp1 = BN_new()) == NULL || (tmp2 = BN_new()) == NULL) goto err;
 189         if (curve == NULL)
 190         {
 191                 if ((ret = X9_62_CURVE_new()) == NULL)
 192                         OPENSSL_ECDSA_ABORT(ECDSA_R_X9_62_CURVE_NEW_FAILURE)
 193         }
 194         else
 195         {
 196                 ret = curve;
 197                 if (ret->a)     ASN1_OCTET_STRING_free(ret->a);
 198                 if (ret->b)     ASN1_OCTET_STRING_free(ret->b);
 199                 if (ret->seed)  ASN1_BIT_STRING_free(ret->seed);
 200         }
 201         if (!EC_GROUP_get_curve_GFp(ecdsa->group, NULL, tmp1, tmp2, NULL))
 202                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 203
 204         if ((ret->a = M_ASN1_OCTET_STRING_new()) == NULL ||
 205             (ret->b = M_ASN1_OCTET_STRING_new()) == NULL )
 206                 OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 207
 208         len1 = BN_num_bytes(tmp1);
 209         len2 = BN_num_bytes(tmp2);
 210
 211         if ((buffer = OPENSSL_malloc(len1 > len2 ? len1 : len2)) == NULL)
 212                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 213
 214         if (len1 == 0) /* => a == 0 */
 215         {
 216                 if (!M_ASN1_OCTET_STRING_set(ret->a, &char_buf, 1))
 217                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 218         }
 219         else
 220         {
 221                 if ((len1 = BN_bn2bin(tmp1, buffer)) == 0) goto err;
 222                 if (!M_ASN1_OCTET_STRING_set(ret->a, buffer, len1))
 223                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 224         }
 225         if (len2 == 0) /* => b == 0 */
 226         {
 227                 if (!M_ASN1_OCTET_STRING_set(ret->a, &char_buf, 1))
 228                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 229         }
 230         else
 231         {
 232                 if ((len2 = BN_bn2bin(tmp2, buffer)) == 0) goto err;
 233                 if (!M_ASN1_OCTET_STRING_set(ret->b, buffer, len2))
 234                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 235         }
 236
 237         if (ecdsa->seed)
 238         {
 239                 if ((ret->seed = ASN1_BIT_STRING_new()) == NULL) goto err;
 240                 if (!ASN1_BIT_STRING_set(ret->seed, ecdsa->seed, (int)ecdsa->seed_len))
 241                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 242         }
 243         else
 244                 ret->seed = NULL;
 245
 246         ok = 1;
 247 err :   if (!ok)
 248         {
 249                 if (ret && !curve) X9_62_CURVE_free(ret);
 250                 ret = NULL;
 251                 ECDSAerr(ECDSA_F_ECDSA_GET_X9_62_CURVE, reason);
 252         }
 253         if (buffer) OPENSSL_free(buffer);
 254         if (tmp1)   BN_free(tmp1);
 255         if (tmp2)   BN_free(tmp2);
 256         return(ret);
 257 }
 258
 259 X9_62_EC_PARAMETERS *ECDSA_get_X9_62_EC_PARAMETERS(const ECDSA *ecdsa, X9_62_EC_PARAMETERS *param)
 260 {
 261         int     ok=0, reason=ERR_R_ASN1_LIB;
 262         size_t  len=0;
 263         X9_62_EC_PARAMETERS *ret=NULL;
 264         BIGNUM        *tmp=NULL;
 265         unsigned char *buffer=NULL;
 266         EC_POINT      *point=NULL;
 267
 268         if (!ecdsa || !ecdsa->group)
 269                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 270         if ((tmp = BN_new()) == NULL)
 271                 OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 272         if (param == NULL)
 273         {
 274                 if ((ret = X9_62_EC_PARAMETERS_new()) == NULL)
 275                         OPENSSL_ECDSA_ABORT(ECDSA_R_X9_62_EC_PARAMETERS_NEW_FAILURE)
 276         }
 277         else
 278                 ret = param;
 279         if (ecdsa->version == 1)
 280                 ret->version = NULL;
 281         else
 282         {
 283                 if (ret->version == NULL && (ret->version = ASN1_INTEGER_new()) == NULL)
 284                         OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 285                 if (!ASN1_INTEGER_set(ret->version, (long)ecdsa->version)) goto err;
 286         }
 287         if ((ret->fieldID = ECDSA_get_X9_62_FIELDID(ecdsa, ret->fieldID)) == NULL)
 288                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_X9_62_FIELDID_FAILURE)
 289         if ((ret->curve = ECDSA_get_X9_62_CURVE(ecdsa, ret->curve)) == NULL)
 290                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_X9_62_CURVE_FAILURE)
 291         if ((point = EC_GROUP_get0_generator(ecdsa->group)) == NULL)
 292                 OPENSSL_ECDSA_ABORT(ECDSA_R_CAN_NOT_GET_GENERATOR)
 293         if (!(len = EC_POINT_point2oct(ecdsa->group, point, POINT_CONVERSION_COMPRESSED, NULL, len, NULL)))
 294                 OPENSSL_ECDSA_ABORT(ECDSA_R_UNEXPECTED_PARAMETER_LENGTH)
 295         if ((buffer = OPENSSL_malloc(len)) == NULL)
 296                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 297         if (!EC_POINT_point2oct(ecdsa->group, point, POINT_CONVERSION_COMPRESSED, buffer, len, NULL))
 298                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 299         if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL)
 300                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 301         if (!ASN1_OCTET_STRING_set(ret->base, buffer, len)) goto err;
 302         if (!EC_GROUP_get_order(ecdsa->group, tmp, NULL))
 303                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 304         if ((ret->order = BN_to_ASN1_INTEGER(tmp, ret->order)) == NULL) goto err;
 305         if (!EC_GROUP_get_cofactor(ecdsa->group, tmp, NULL))
 306                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 307         if ((ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor)) == NULL) goto err;
 308         ok = 1;
 309
 310 err :   if(!ok)
 311         {
 312                 ECDSAerr(ECDSA_F_ECDSA_GET_X9_62_EC_PARAMETERS, reason);
 313                 if (ret && !param) X9_62_EC_PARAMETERS_free(ret);
 314                 ret = NULL;
 315         }
 316         if (tmp)    BN_free(tmp);
 317         if (buffer) OPENSSL_free(buffer);
 318         return(ret);
 319 }
 320
 321 EC_PARAMETERS *ECDSA_get_EC_PARAMETERS(const ECDSA *ecdsa, EC_PARAMETERS *params)
 322 {
 323         int ok = 1;
 324         int tmp = 0;
 325         EC_PARAMETERS *ret = params;
 326         if (ret == NULL)
 327                 if ((ret = EC_PARAMETERS_new()) == NULL)
 328                 {
 329                         ECDSAerr(ECDSA_F_ECDSA_GET_EC_PARAMETERS, ERR_R_MALLOC_FAILURE);
 330                         return NULL;
 331                 }
 332         if (ecdsa == NULL)
 333         {       /* missing parameter */
 334                 ECDSAerr(ECDSA_F_ECDSA_GET_EC_PARAMETERS, ECDSA_R_MISSING_PARAMETERS);
 335                 EC_PARAMETERS_free(params);
 336                 return NULL;
 337         }
 338         if (ecdsa->parameter_flags & ECDSA_FLAG_NAMED_CURVE)
 339         {       /* use a named curve */
 340                 tmp = EC_GROUP_get_nid(ecdsa->group);
 341                 if (tmp)
 342                 {
 343                         ret->type = 0;
 344                         if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
 345                                 ok = 0;
 346                 }
 347                 else
 348                 {
 349                         /* use the x9_64 ec_parameters structure */
 350                         ret->type = 1;
 351                         if ((ret->value.parameters = ECDSA_get_X9_62_EC_PARAMETERS(ecdsa, NULL)) == NULL)
 352                                 ok = 0;
 353                 }
 354         }
 355         else if (ecdsa->parameter_flags & ECDSA_FLAG_IMPLICITLYCA)
 356         {       /* use implicitlyCA */
 357                 ret->type = 2;
 358                 if ((ret->value.implicitlyCA = ASN1_NULL_new()) == NULL)
 359                         ok = 0;
 360         }
 361         else
 362         {       /* use the x9_64 ec_parameters structure */
 363                 ret->type = 1;
 364                 if ((ret->value.parameters = ECDSA_get_X9_62_EC_PARAMETERS(ecdsa, NULL)) == NULL)
 365                         ok = 0;
 366         }
 367         if (!ok)
 368         {
 369                 EC_PARAMETERS_free(ret);
 370                 return NULL;
 371         }
 372                 return ret;
 373 }
 374
 375 ECDSA         *ECDSA_x9_62parameters2ecdsa(const X9_62_EC_PARAMETERS *params, ECDSA *ecdsa)
 376 {
 377         int       ok=0, reason=ERR_R_EC_LIB, tmp;
 378         ECDSA     *ret=NULL;
 379         const EC_METHOD *meth=NULL;
 380         BIGNUM    *tmp_1=NULL, *tmp_2=NULL, *tmp_3=NULL;
 381         EC_POINT  *point=NULL;
 382
 383         if (!params)
 384                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 385         if (ecdsa == NULL)
 386         {
 387                 if ((ret = ECDSA_new()) == NULL)
 388                         OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_NEW_FAILURE)
 389         }
 390         else
 391         {
 392                 if (ecdsa->group)       EC_GROUP_free(ecdsa->group);
 393                 if (ecdsa->pub_key)     EC_POINT_free(ecdsa->pub_key);
 394                 ecdsa->pub_key = NULL;
 395                 if (ecdsa->priv_key)    BN_clear_free(ecdsa->priv_key);
 396                 ecdsa->priv_key = NULL;
 397                 if (ecdsa->seed)        OPENSSL_free(ecdsa->seed);
 398                 ecdsa->seed = NULL;
 399                 if (ecdsa->kinv)
 400                 {
 401                         BN_clear_free(ecdsa->kinv);
 402                         ecdsa->kinv = NULL;
 403                 }
 404                 if (ecdsa->r)
 405                 {
 406                         BN_clear_free(ecdsa->r);
 407                         ecdsa->r = NULL;
 408                 }
 409                 ret = ecdsa;
 410         }
 411         /* TODO : characteristic two */
 412         if (!params->fieldID || !params->fieldID->fieldType || !params->fieldID->parameters)
 413                 OPENSSL_ECDSA_ABORT(ECDSA_R_NO_FIELD_SPECIFIED)
 414         tmp = OBJ_obj2nid(params->fieldID->fieldType);
 415         if (tmp == NID_X9_62_characteristic_two_field)
 416         {
 417                 OPENSSL_ECDSA_ABORT(ECDSA_R_NOT_SUPPORTED)
 418         }
 419         else if (tmp == NID_X9_62_prime_field)
 420         {
 421                 /* TODO : optimal method for the curve */
 422                 meth = EC_GFp_mont_method();
 423                 if ((ret->group = EC_GROUP_new(meth)) == NULL) goto err;
 424                 if (params->fieldID->parameters->type != V_ASN1_INTEGER)
 425                         OPENSSL_ECDSA_ABORT(ECDSA_R_UNEXPECTED_ASN1_TYPE)
 426                 if (!params->fieldID->parameters->value.integer)
 427                         OPENSSL_ECDSA_ABORT(ECDSA_R_PRIME_MISSING)
 428                 if ((tmp_1 = ASN1_INTEGER_to_BN(params->fieldID->parameters->value.integer, NULL)) == NULL)
 429                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 430                 if (!params->curve)
 431                         OPENSSL_ECDSA_ABORT(ECDSA_R_NO_CURVE_SPECIFIED)
 432                 if (!params->curve->a || !params->curve->a->data)
 433                         OPENSSL_ECDSA_ABORT(ECDSA_R_NO_CURVE_PARAMETER_A_SPECIFIED)
 434                 if ((tmp_2 = BN_bin2bn(params->curve->a->data, params->curve->a->length, NULL)) == NULL)
 435                         OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 436                 if (!params->curve->b || !params->curve->b->data)
 437                         OPENSSL_ECDSA_ABORT(ECDSA_R_NO_CURVE_PARAMETER_B_SPECIFIED)
 438                 if ((tmp_3 = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL)) == NULL)
 439                         OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 440                 if (!EC_GROUP_set_curve_GFp(ret->group, tmp_1, tmp_2, tmp_3, NULL)) goto err;
 441                 if ((point = EC_POINT_new(ret->group)) == NULL) goto err;
 442         }
 443         else OPENSSL_ECDSA_ABORT(ECDSA_R_WRONG_FIELD_IDENTIFIER)
 444         if (params->curve->seed != NULL)
 445         {
 446                 if (ret->seed != NULL)
 447                         OPENSSL_free(ret->seed);
 448                 if ((ret->seed = OPENSSL_malloc(params->curve->seed->length)) == NULL)
 449                         OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 450                 memcpy(ret->seed, params->curve->seed->data, params->curve->seed->length);
 451                 ret->seed_len = params->curve->seed->length;
 452         }
 453         if (params->version)
 454         {
 455                 if ((ret->version = (int)ASN1_INTEGER_get(params->version)) < 0)
 456                         OPENSSL_ECDSA_ABORT(ECDSA_R_UNEXPECTED_VERSION_NUMER)
 457         }
 458         else
 459                 ret->version  = 1;
 460         if (params->order && params->cofactor && params->base && params->base->data)
 461         {
 462                 if ((tmp_1 = ASN1_INTEGER_to_BN(params->order, tmp_1)) == NULL)
 463                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 464                 if ((tmp_2 = ASN1_INTEGER_to_BN(params->cofactor, tmp_2)) == NULL)
 465                         OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 466                 if (!EC_POINT_oct2point(ret->group, point, params->base->data,
 467                                 params->base->length, NULL)) goto err;
 468                 if (!EC_GROUP_set_generator(ret->group, point, tmp_1, tmp_2)) goto err;
 469         }
 470         ok = 1;
 471
 472 err:    if (!ok)
 473         {
 474                 ECDSAerr(ECDSA_F_ECDSA_GET, reason);
 475                 if (ret && !ecdsa) ECDSA_free(ret);
 476                 ret = NULL;
 477         }
 478         if (tmp_1)      BN_free(tmp_1);
 479         if (tmp_2)      BN_free(tmp_2);
 480         if (tmp_3)      BN_free(tmp_3);
 481         if (point)      EC_POINT_free(point);
 482         return(ret);
 483 }
 484
 485 ECDSA *ECDSA_ecparameters2ecdsa(const EC_PARAMETERS *params, ECDSA *ecdsa)
 486 {
 487         ECDSA *ret = ecdsa;
 488         int tmp = 0;
 489         if (ret == NULL)
 490                 if ((ret = ECDSA_new()) == NULL)
 491                 {
 492                         ECDSAerr(ECDSA_F_ECDSA_GET_ECDSA, ERR_R_MALLOC_FAILURE);
 493                         return NULL;
 494                 }
 495         if (params == NULL)
 496         {
 497                 ECDSAerr(ECDSA_F_ECDSA_GET_ECDSA, ECDSA_R_MISSING_PARAMETERS);
 498                 ECDSA_free(ret);
 499                 return NULL;
 500         }
 501         if (params->type == 0)
 502         {
 503                 if (ret->group)
 504                         EC_GROUP_free(ret->group);
 505                 tmp = OBJ_obj2nid(params->value.named_curve);
 506                 ret->parameter_flags |= ECDSA_FLAG_NAMED_CURVE;
 507                 if ((ret->group = EC_GROUP_new_by_name(tmp)) == NULL)
 508                 {
 509                         ECDSAerr(ECDSA_F_ECDSA_GET_ECDSA, ECDSA_R_EC_GROUP_NID2CURVE_FAILURE);
 510                         ECDSA_free(ret);
 511                         return NULL;
 512                 }
 513         }
 514         else if (params->type == 1)
 515         {
 516                 ret = ECDSA_x9_62parameters2ecdsa(params->value.parameters, ret);
 517         }
 518         else if (params->type == 2)
 519         {
 520                 if (ret->group)
 521                         EC_GROUP_free(ret->group);
 522                 ret->group = NULL;
 523                 ret->parameter_flags |= ECDSA_FLAG_IMPLICITLYCA;
 524         }
 525         else
 526         {
 527                 ECDSAerr(ECDSA_F_ECDSA_GET_ECDSA, ECDSA_R_UNKNOWN_PARAMETERS_TYPE);
 528                 ECDSA_free(ret);
 529                 ret = NULL;
 530         }
 531         return ret;
 532 }
 533
 534 ECDSA   *d2i_ECDSAParameters(ECDSA **a, const unsigned char **in, long len)
 535 {
 536         ECDSA           *ecdsa = (a && *a)? *a : NULL;
 537         EC_PARAMETERS   *params = NULL;
 538
 539         if ((params = d2i_EC_PARAMETERS(NULL, in, len)) == NULL)
 540         {
 541                 ECDSAerr(ECDSA_F_D2I_ECDSAPARAMETERS, ECDSA_R_D2I_EC_PARAMETERS_FAILURE);
 542                 EC_PARAMETERS_free(params);
 543                 return NULL;
 544         }
 545         if ((ecdsa = ECDSA_ecparameters2ecdsa(params, ecdsa)) == NULL)
 546         {
 547                 ECDSAerr(ECDSA_F_D2I_ECDSAPARAMETERS, ECDSA_R_ECPARAMETERS2ECDSA_FAILURE);
 548                 return NULL;
 549         }
 550         EC_PARAMETERS_free(params);
 551         return(ecdsa);
 552 }
 553
 554 int     i2d_ECDSAParameters(ECDSA *a, unsigned char **out)
 555 {
 556         int             ret=0;
 557         EC_PARAMETERS   *tmp = ECDSA_get_EC_PARAMETERS(a, NULL);
 558         if (tmp == NULL)
 559         {
 560                 ECDSAerr(ECDSA_F_I2D_ECDSAPARAMETERS, ECDSA_R_ECDSA_GET_EC_PARAMETERS_FAILURE);
 561                 return 0;
 562         }
 563         if ((ret = i2d_EC_PARAMETERS(tmp, out)) == 0)
 564         {
 565                 ECDSAerr(ECDSA_F_I2D_ECDSAPARAMETERS, ECDSA_R_ECDSA_R_D2I_EC_PARAMETERS_FAILURE);
 566                 EC_PARAMETERS_free(tmp);
 567                 return 0;
 568         }
 569         EC_PARAMETERS_free(tmp);
 570         return(ret);
 571 }
 572
 573 ECDSA   *d2i_ECDSAPrivateKey(ECDSA **a, const unsigned char **in, long len)
 574 {
 575         int reason=ERR_R_BN_LIB, ok=0;
 576         ECDSA *ret=NULL;
 577         ECDSAPrivateKey *priv_key=NULL;
 578
 579         if ((priv_key = ECDSAPrivateKey_new()) == NULL)
 580                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSAPRIVATEKEY_NEW_FAILURE)
 581         if ((priv_key = d2i_ecdsaPrivateKey(&priv_key, in, len)) == NULL)
 582                 OPENSSL_ECDSA_ABORT(ECDSA_R_D2I_ECDSA_PRIVATEKEY_FAILURE)
 583         if ((ret = ECDSA_ecparameters2ecdsa(priv_key->parameters, NULL)) == NULL)
 584                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_FAILURE)
 585         ret->version = priv_key->version;
 586         ret->write_params = priv_key->write_params;
 587         if (priv_key->priv_key)
 588         {
 589                 if ((ret->priv_key = BN_dup(priv_key->priv_key)) == NULL)
 590                         OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 591         }
 592         else
 593                 OPENSSL_ECDSA_ABORT(ECDSA_R_D2I_ECDSAPRIVATEKEY_MISSING_PRIVATE_KEY)
 594         if ((ret->pub_key = EC_POINT_new(ret->group)) == NULL)
 595                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 596         if (!EC_POINT_oct2point(ret->group, ret->pub_key, priv_key->pub_key->data, priv_key->pub_key->length, NULL))
 597                 OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 598         ok = 1;
 599 err :   if (!ok)
 600         {
 601                 if (ret) ECDSA_free(ret);
 602                 ret = NULL;
 603                 ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, reason);
 604         }
 605         if (priv_key)   ECDSAPrivateKey_free(priv_key);
 606         return(ret);
 607 }
 608
 609 int     i2d_ECDSAPrivateKey(ECDSA *a, unsigned char **out)
 610 {
 611         int ret=0, ok=0, reason=ERR_R_EC_LIB;
 612         unsigned char   *buffer=NULL;
 613         size_t          buf_len=0;
 614         ECDSAPrivateKey *priv_key=NULL;
 615
 616         if (a == NULL || a->group == NULL)
 617                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 618         if ((priv_key = ECDSAPrivateKey_new()) == NULL)
 619                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSAPRIVATEKEY_NEW_FAILURE)
 620         if ((priv_key->parameters = ECDSA_get_EC_PARAMETERS(a, priv_key->parameters)) == NULL)
 621                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_X9_62_EC_PARAMETERS_FAILURE)
 622         priv_key->version      = a->version;
 623         if (BN_copy(priv_key->priv_key, a->priv_key) == NULL)
 624                 OPENSSL_ECDSA_ABORT(ERR_R_BN_LIB)
 625         buf_len = EC_POINT_point2oct(a->group, a->pub_key, POINT_CONVERSION_COMPRESSED, NULL, 0, NULL);
 626         if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
 627                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 628         if (!EC_POINT_point2oct(a->group, a->pub_key, POINT_CONVERSION_COMPRESSED,
 629                                 buffer, buf_len, NULL)) goto err;
 630         if (!M_ASN1_OCTET_STRING_set(priv_key->pub_key, buffer, buf_len))
 631                 OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 632         if ((ret = i2d_ecdsaPrivateKey(priv_key, out)) == 0)
 633                 OPENSSL_ECDSA_ABORT(ECDSA_R_I2D_ECDSA_PRIVATEKEY)
 634         ok=1;
 635
 636 err:    if (!ok)
 637                 ECDSAerr(ECDSA_F_I2D_ECDSAPRIVATEKEY, reason);
 638         if (buffer)   OPENSSL_free(buffer);
 639         if (priv_key) ECDSAPrivateKey_free(priv_key);
 640         return(ok?ret:0);
 641 }
 642
 643
 644 ECDSA   *d2i_ECDSAPublicKey(ECDSA **a, const unsigned char **in, long len)
 645 {
 646         int reason=ERR_R_BN_LIB, ok=0, ecdsa_new=1;
 647         ECDSA *ret=NULL;
 648         ECDSAPrivateKey *priv_key=NULL;
 649
 650         if (a && *a)
 651         {
 652                 ecdsa_new = 0;
 653                 ret = *a;
 654         }
 655         else if ((ret = ECDSA_new()) == NULL)
 656                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE);
 657         if ((priv_key = ECDSAPrivateKey_new()) == NULL)
 658                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSAPRIVATEKEY_NEW_FAILURE)
 659         if ((priv_key = d2i_ecdsaPublicKey(&priv_key, in, len)) == NULL)
 660                 OPENSSL_ECDSA_ABORT(ECDSA_R_D2I_ECDSA_PRIVATEKEY_FAILURE)
 661         if (priv_key->write_params == 0)
 662         {
 663                 if (ecdsa_new || !ret->group)
 664                         OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 665                 if (ret->pub_key == NULL && (ret->pub_key = EC_POINT_new(ret->group)) == NULL)
 666                         OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 667                 if (!EC_POINT_oct2point(ret->group, ret->pub_key, priv_key->pub_key->data,
 668                                         priv_key->pub_key->length, NULL))
 669                         OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 670         }
 671         else if (priv_key->write_params == 1)
 672         {
 673                 if ((ret = ECDSA_ecparameters2ecdsa(priv_key->parameters, ret)) == NULL)
 674                         OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_FAILURE)
 675                 if (ret->pub_key == NULL && (ret->pub_key = EC_POINT_new(ret->group)) == NULL)
 676                         OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 677                 if (!EC_POINT_oct2point(ret->group, ret->pub_key, priv_key->pub_key->data,
 678                                 priv_key->pub_key->length, NULL))
 679                         OPENSSL_ECDSA_ABORT(ERR_R_EC_LIB)
 680         }
 681         else    OPENSSL_ECDSA_ABORT(ECDSA_R_UNEXPECTED_PARAMETER)
 682         ret->write_params = 1;
 683         ok = 1;
 684 err :   if (!ok)
 685         {
 686                 if (ret && ecdsa_new) ECDSA_free(ret);
 687                 ret = NULL;
 688                 ECDSAerr(ECDSA_F_D2I_ECDSAPRIVATEKEY, reason);
 689         }
 690         if (priv_key)   ECDSAPrivateKey_free(priv_key);
 691         return(ret);
 692 }
 693
 694 int     i2d_ECDSAPublicKey(ECDSA *a, unsigned char **out)
 695 {
 696         int     ret=0, reason=ERR_R_EC_LIB, ok=0;
 697         unsigned char   *buffer=NULL;
 698         size_t          buf_len=0;
 699         ECDSAPrivateKey *priv_key=NULL;
 700
 701         if (a == NULL)
 702                 OPENSSL_ECDSA_ABORT(ECDSA_R_MISSING_PARAMETERS)
 703         if ((priv_key = ECDSAPrivateKey_new()) == NULL)
 704                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSAPRIVATEKEY_NEW_FAILURE)
 705         if ((priv_key->parameters = ECDSA_get_EC_PARAMETERS(a, priv_key->parameters)) == NULL)
 706                 OPENSSL_ECDSA_ABORT(ECDSA_R_ECDSA_GET_X9_62_EC_PARAMETERS_FAILURE)
 707         priv_key->version = a->version;
 708         priv_key->write_params = a->write_params;
 709         buf_len = EC_POINT_point2oct(a->group, a->pub_key, POINT_CONVERSION_FORM, NULL, 0, NULL);
 710         if (!buf_len || (buffer = OPENSSL_malloc(buf_len)) == NULL)
 711                 OPENSSL_ECDSA_ABORT(ERR_R_MALLOC_FAILURE)
 712         if (!EC_POINT_point2oct(a->group, a->pub_key, POINT_CONVERSION_FORM,
 713                                 buffer, buf_len, NULL)) goto err;
 714         if (!M_ASN1_OCTET_STRING_set(priv_key->pub_key, buffer, buf_len))
 715                 OPENSSL_ECDSA_ABORT(ERR_R_ASN1_LIB)
 716         if ((ret = i2d_ecdsaPublicKey(priv_key, out)) == 0)
 717                 OPENSSL_ECDSA_ABORT(ECDSA_R_I2D_ECDSA_PUBLICKEY)
 718         ok = 1;
 719
 720 err:    if (!ok)
 721                 ECDSAerr(ECDSA_F_I2D_ECDSAPUBLICKEY, reason);
 722         if (buffer)   OPENSSL_free(buffer);
 723         if (priv_key) ECDSAPrivateKey_free(priv_key);
 724         return(ok?ret:0);
 725 }