crypto/ec/ec_ameth.c

   1 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   2  * project 2006.
   3  */
   4 /* ====================================================================
   5  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  *
  19  * 3. All advertising materials mentioning features or use of this
  20  *    software must display the following acknowledgment:
  21  *    "This product includes software developed by the OpenSSL Project
  22  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  23  *
  24  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  25  *    endorse or promote products derived from this software without
  26  *    prior written permission. For written permission, please contact
  27  *    licensing@OpenSSL.org.
  28  *
  29  * 5. Products derived from this software may not be called "OpenSSL"
  30  *    nor may "OpenSSL" appear in their names without prior written
  31  *    permission of the OpenSSL Project.
  32  *
  33  * 6. Redistributions of any form whatsoever must retain the following
  34  *    acknowledgment:
  35  *    "This product includes software developed by the OpenSSL Project
  36  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  37  *
  38  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  39  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  40  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  41  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  42  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  43  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  44  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  45  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  46  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  47  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  48  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  49  * OF THE POSSIBILITY OF SUCH DAMAGE.
  50  * ====================================================================
  51  *
  52  * This product includes cryptographic software written by Eric Young
  53  * (eay@cryptsoft.com).  This product includes software written by Tim
  54  * Hudson (tjh@cryptsoft.com).
  55  *
  56  */
  57
  58 #include <stdio.h>
  59 #include "cryptlib.h"
  60 #include <openssl/x509.h>
  61 #include <openssl/ec.h>
  62 #include "asn1_locl.h"
  63
  64 static int eckey_param2type(int *pptype, void **ppval, EC_KEY *ec_key)
  65         {
  66         const EC_GROUP  *group;
  67         int nid;
  68         if (ec_key == NULL || (group = EC_KEY_get0_group(ec_key)) == NULL)
  69         {
  70                 ECerr(EC_F_ECKEY_PARAM2TYPE, EC_R_MISSING_PARAMETERS);
  71                 return 0;
  72         }
  73         if (EC_GROUP_get_asn1_flag(group)
  74                      && (nid = EC_GROUP_get_curve_name(group)))
  75                 /* we have a 'named curve' => just set the OID */
  76                 {
  77                 *ppval = OBJ_nid2obj(nid);
  78                 *pptype = V_ASN1_OBJECT;
  79                 }
  80         else    /* explicit parameters */
  81                 {
  82                 ASN1_STRING *pstr = NULL;
  83                 pstr = ASN1_STRING_new();
  84                 if (!pstr)
  85                         return 0;
  86                 pstr->length = i2d_ECParameters(ec_key, &pstr->data);
  87                 if (pstr->length < 0)
  88                         {
  89                         ASN1_STRING_free(pstr);
  90                         ECerr(EC_F_ECKEY_PARAM2TYPE, ERR_R_EC_LIB);
  91                         return 0;
  92                         }
  93                 *ppval = pstr;
  94                 *pptype = V_ASN1_SEQUENCE;
  95                 }
  96         return 1;
  97         }
  98
  99 static int eckey_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
 100         {
 101         EC_KEY *ec_key = pkey->pkey.ec;
 102         void *pval = NULL;
 103         int ptype;
 104         unsigned char *penc = NULL, *p;
 105         int penclen;
 106
 107         if (!eckey_param2type(&ptype, &pval, ec_key))
 108                 {
 109                 ECerr(EC_F_ECKEY_PUB_ENCODE, ERR_R_EC_LIB);
 110                 return 0;
 111                 }
 112         penclen = i2o_ECPublicKey(ec_key, NULL);
 113         if (penclen <= 0)
 114                 goto err;
 115         penc = OPENSSL_malloc(penclen);
 116         if (!penc)
 117                 goto err;
 118         p = penc;
 119         penclen = i2o_ECPublicKey(ec_key, &p);
 120         if (penclen <= 0)
 121                 goto err;
 122         if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_EC),
 123                                 ptype, pval, penc, penclen))
 124                 return 1;
 125         err:
 126         if (ptype == V_ASN1_OBJECT)
 127                 ASN1_OBJECT_free(pval);
 128         else
 129                 ASN1_STRING_free(pval);
 130         if (penc)
 131                 OPENSSL_free(penc);
 132         return 0;
 133         }
 134
 135 static EC_KEY *eckey_type2param(int ptype, void *pval)
 136         {
 137         EC_KEY *eckey = NULL;
 138         if (ptype == V_ASN1_SEQUENCE)
 139                 {
 140                 ASN1_STRING *pstr = pval;
 141                 const unsigned char *pm = NULL;
 142                 int pmlen;
 143                 pm = pstr->data;
 144                 pmlen = pstr->length;
 145                 if (!(eckey = d2i_ECParameters(NULL, &pm, pmlen)))
 146                         {
 147                         ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR);
 148                         goto ecerr;
 149                         }
 150                 }
 151         else if (ptype == V_ASN1_OBJECT)
 152                 {
 153                 ASN1_OBJECT *poid = pval;
 154                 EC_GROUP *group;
 155
 156                 /* type == V_ASN1_OBJECT => the parameters are given
 157                  * by an asn1 OID
 158                  */
 159                 if ((eckey = EC_KEY_new()) == NULL)
 160                         {
 161                         ECerr(EC_F_ECKEY_TYPE2PARAM, ERR_R_MALLOC_FAILURE);
 162                         goto ecerr;
 163                         }
 164                 group = EC_GROUP_new_by_curve_name(OBJ_obj2nid(poid));
 165                 if (group == NULL)
 166                         goto ecerr;
 167                 EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE);
 168                 if (EC_KEY_set_group(eckey, group) == 0)
 169                         goto ecerr;
 170                 EC_GROUP_free(group);
 171                 }
 172         else
 173                 {
 174                 ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR);
 175                 goto ecerr;
 176                 }
 177
 178         return eckey;
 179
 180         ecerr:
 181         if (eckey)
 182                 EC_KEY_free(eckey);
 183         return NULL;
 184         }
 185
 186 static int eckey_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
 187         {
 188         const unsigned char *p = NULL;
 189         void *pval;
 190         int ptype, pklen;
 191         EC_KEY *eckey = NULL;
 192         X509_ALGOR *palg;
 193
 194         if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
 195                 return 0;
 196         X509_ALGOR_get0(NULL, &ptype, &pval, palg);
 197
 198         eckey = eckey_type2param(ptype, pval);
 199
 200         if (!eckey)
 201                 {
 202                 ECerr(EC_F_ECKEY_PUB_DECODE, ERR_R_EC_LIB);
 203                 return 0;
 204                 }
 205
 206         /* We have parameters now set public key */
 207         if (!o2i_ECPublicKey(&eckey, &p, pklen))
 208                 {
 209                 ECerr(EC_F_ECKEY_PUB_DECODE, EC_R_DECODE_ERROR);
 210                 goto ecerr;
 211                 }
 212
 213         EVP_PKEY_assign_EC_KEY(pkey, eckey);
 214         return 1;
 215
 216         ecerr:
 217         if (eckey)
 218                 EC_KEY_free(eckey);
 219         return 0;
 220         }
 221
 222 static int eckey_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 223         {
 224         int  r;
 225         const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);
 226         const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec),
 227                        *pb = EC_KEY_get0_public_key(b->pkey.ec);
 228         r = EC_POINT_cmp(group, pa, pb, NULL);
 229         if (r == 0)
 230                 return 1;
 231         if (r == 1)
 232                 return 0;
 233         return -2;
 234         }
 235
 236 static int eckey_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
 237         {
 238         const unsigned char *p = NULL;
 239         void *pval;
 240         int ptype, pklen;
 241         EC_KEY *eckey = NULL;
 242         X509_ALGOR *palg;
 243
 244         if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
 245                 return 0;
 246         X509_ALGOR_get0(NULL, &ptype, &pval, palg);
 247
 248         eckey = eckey_type2param(ptype, pval);
 249
 250         if (!eckey)
 251                 goto ecliberr;
 252
 253         /* We have parameters now set private key */
 254         if (!d2i_ECPrivateKey(&eckey, &p, pklen))
 255                 {
 256                 ECerr(EC_F_ECKEY_PRIV_DECODE, EC_R_DECODE_ERROR);
 257                 goto ecerr;
 258                 }
 259
 260         /* calculate public key (if necessary) */
 261         if (EC_KEY_get0_public_key(eckey) == NULL)
 262                 {
 263                 const BIGNUM *priv_key;
 264                 const EC_GROUP *group;
 265                 EC_POINT *pub_key;
 266                 /* the public key was not included in the SEC1 private
 267                  * key => calculate the public key */
 268                 group   = EC_KEY_get0_group(eckey);
 269                 pub_key = EC_POINT_new(group);
 270                 if (pub_key == NULL)
 271                         {
 272                         ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
 273                         goto ecliberr;
 274                         }
 275                 if (!EC_POINT_copy(pub_key, EC_GROUP_get0_generator(group)))
 276                         {
 277                         EC_POINT_free(pub_key);
 278                         ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
 279                         goto ecliberr;
 280                         }
 281                 priv_key = EC_KEY_get0_private_key(eckey);
 282                 if (!EC_POINT_mul(group, pub_key, priv_key, NULL, NULL, NULL))
 283                         {
 284                         EC_POINT_free(pub_key);
 285                         ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
 286                         goto ecliberr;
 287                         }
 288                 if (EC_KEY_set_public_key(eckey, pub_key) == 0)
 289                         {
 290                         EC_POINT_free(pub_key);
 291                         ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
 292                         goto ecliberr;
 293                         }
 294                 EC_POINT_free(pub_key);
 295                 }
 296
 297         EVP_PKEY_assign_EC_KEY(pkey, eckey);
 298         return 1;
 299
 300         ecliberr:
 301         ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
 302         ecerr:
 303         if (eckey)
 304                 EC_KEY_free(eckey);
 305         return 0;
 306         }
 307
 308 static int eckey_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
 309 {
 310         EC_KEY          *ec_key;
 311         unsigned char   *ep, *p;
 312         int             eplen, ptype;
 313         void            *pval;
 314         unsigned int    tmp_flags, old_flags;
 315
 316         ec_key = pkey->pkey.ec;
 317
 318         if (!eckey_param2type(&ptype, &pval, ec_key))
 319                 {
 320                 ECerr(EC_F_ECKEY_PRIV_ENCODE, EC_R_DECODE_ERROR);
 321                 return 0;
 322                 }
 323
 324         /* set the private key */
 325
 326         /* do not include the parameters in the SEC1 private key
 327          * see PKCS#11 12.11 */
 328         old_flags = EC_KEY_get_enc_flags(ec_key);
 329         tmp_flags = old_flags | EC_PKEY_NO_PARAMETERS;
 330         EC_KEY_set_enc_flags(ec_key, tmp_flags);
 331         eplen = i2d_ECPrivateKey(ec_key, NULL);
 332         if (!eplen)
 333         {
 334                 EC_KEY_set_enc_flags(ec_key, old_flags);
 335                 ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB);
 336                 return 0;
 337         }
 338         ep = (unsigned char *) OPENSSL_malloc(eplen);
 339         if (!ep)
 340         {
 341                 EC_KEY_set_enc_flags(ec_key, old_flags);
 342                 ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
 343                 return 0;
 344         }
 345         p = ep;
 346         if (!i2d_ECPrivateKey(ec_key, &p))
 347         {
 348                 EC_KEY_set_enc_flags(ec_key, old_flags);
 349                 OPENSSL_free(ep);
 350                 ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB);
 351         }
 352         /* restore old encoding flags */
 353         EC_KEY_set_enc_flags(ec_key, old_flags);
 354
 355         if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), 0,
 356                                 ptype, pval, ep, eplen))
 357                 return 0;
 358
 359         return 1;
 360 }
 361
 362 static int int_ec_size(const EVP_PKEY *pkey)
 363         {
 364         return ECDSA_size(pkey->pkey.ec);
 365         }
 366
 367 static int ec_bits(const EVP_PKEY *pkey)
 368         {
 369         BIGNUM *order = BN_new();
 370         const EC_GROUP *group;
 371         int ret;
 372
 373         if (!order)
 374                 {
 375                 ERR_clear_error();
 376                 return 0;
 377                 }
 378         group = EC_KEY_get0_group(pkey->pkey.ec);
 379         if (!EC_GROUP_get_order(group, order, NULL))
 380                 {
 381                 ERR_clear_error();
 382                 return 0;
 383                 }
 384
 385         ret = BN_num_bits(order);
 386         BN_free(order);
 387         return ret;
 388         }
 389
 390 static int ec_missing_parameters(const EVP_PKEY *pkey)
 391         {
 392         if (EC_KEY_get0_group(pkey->pkey.ec) == NULL)
 393                 return 1;
 394         return 0;
 395         }
 396
 397 static int ec_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
 398         {
 399         EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec));
 400         if (group == NULL)
 401                 return 0;
 402         if (EC_KEY_set_group(to->pkey.ec, group) == 0)
 403                 return 0;
 404         EC_GROUP_free(group);
 405         return 1;
 406         }
 407
 408 static int ec_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 409         {
 410         const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec),
 411                        *group_b = EC_KEY_get0_group(b->pkey.ec);
 412         if (EC_GROUP_cmp(group_a, group_b, NULL))
 413                 return 0;
 414         else
 415                 return 1;
 416         }
 417
 418 static void int_ec_free(EVP_PKEY *pkey)
 419         {
 420         EC_KEY_free(pkey->pkey.ec);
 421         }
 422
 423 static int do_EC_KEY_print(BIO *bp, const EC_KEY *x, int off, int ktype)
 424         {
 425         unsigned char *buffer=NULL;
 426         const char *ecstr;
 427         size_t  buf_len=0, i;
 428         int     ret=0, reason=ERR_R_BIO_LIB;
 429         BIGNUM  *pub_key=NULL, *order=NULL;
 430         BN_CTX  *ctx=NULL;
 431         const EC_GROUP *group;
 432         const EC_POINT *public_key;
 433         const BIGNUM *priv_key;
 434
 435         if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL)
 436                 {
 437                 reason = ERR_R_PASSED_NULL_PARAMETER;
 438                 goto err;
 439                 }
 440
 441         ctx = BN_CTX_new();
 442         if (ctx == NULL)
 443                 {
 444                 reason = ERR_R_MALLOC_FAILURE;
 445                 goto err;
 446                 }
 447
 448         if (ktype > 0)
 449                 {
 450                 public_key = EC_KEY_get0_public_key(x);
 451                 if ((pub_key = EC_POINT_point2bn(group, public_key,
 452                         EC_KEY_get_conv_form(x), NULL, ctx)) == NULL)
 453                         {
 454                         reason = ERR_R_EC_LIB;
 455                         goto err;
 456                         }
 457                 if (pub_key)
 458                         buf_len = (size_t)BN_num_bytes(pub_key);
 459                 }
 460
 461         if (ktype == 2)
 462                 {
 463                 priv_key = EC_KEY_get0_private_key(x);
 464                 if (priv_key && (i = (size_t)BN_num_bytes(priv_key)) > buf_len)
 465                         buf_len = i;
 466                 }
 467         else
 468                 priv_key = NULL;
 469
 470         if (ktype > 0)
 471                 {
 472                 buf_len += 10;
 473                 if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
 474                         {
 475                         reason = ERR_R_MALLOC_FAILURE;
 476                         goto err;
 477                         }
 478                 }
 479         if (ktype == 2)
 480                 ecstr = "Private-Key";
 481         else if (ktype == 1)
 482                 ecstr = "Public-Key";
 483         else
 484                 ecstr = "ECDSA-Parameters";
 485
 486         if (!BIO_indent(bp, off, 128))
 487                 goto err;
 488         if ((order = BN_new()) == NULL)
 489                 goto err;
 490         if (!EC_GROUP_get_order(group, order, NULL))
 491                 goto err;
 492         if (BIO_printf(bp, "%s: (%d bit)\n", ecstr,
 493                 BN_num_bits(order)) <= 0) goto err;
 494
 495         if ((priv_key != NULL) && !ASN1_bn_print(bp, "priv:", priv_key,
 496                 buffer, off))
 497                 goto err;
 498         if ((pub_key != NULL) && !ASN1_bn_print(bp, "pub: ", pub_key,
 499                 buffer, off))
 500                 goto err;
 501         if (!ECPKParameters_print(bp, group, off))
 502                 goto err;
 503         ret=1;
 504 err:
 505         if (!ret)
 506                 ECerr(EC_F_DO_EC_KEY_PRINT, reason);
 507         if (pub_key)
 508                 BN_free(pub_key);
 509         if (order)
 510                 BN_free(order);
 511         if (ctx)
 512                 BN_CTX_free(ctx);
 513         if (buffer != NULL)
 514                 OPENSSL_free(buffer);
 515         return(ret);
 516         }
 517
 518 static int eckey_param_decode(EVP_PKEY *pkey,
 519                                         const unsigned char **pder, int derlen)
 520         {
 521         EC_KEY *eckey;
 522         if (!(eckey = d2i_ECParameters(NULL, pder, derlen)))
 523                 {
 524                 ECerr(EC_F_ECKEY_PARAM_DECODE, ERR_R_EC_LIB);
 525                 return 0;
 526                 }
 527         EVP_PKEY_assign_EC_KEY(pkey, eckey);
 528         return 1;
 529         }
 530
 531 static int eckey_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
 532         {
 533         return i2d_ECParameters(pkey->pkey.ec, pder);
 534         }
 535
 536 static int eckey_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 537                                                         ASN1_PCTX *ctx)
 538         {
 539         return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 0);
 540         }
 541
 542 static int eckey_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 543                                                         ASN1_PCTX *ctx)
 544         {
 545         return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 1);
 546         }
 547
 548
 549 static int eckey_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 550                                                         ASN1_PCTX *ctx)
 551         {
 552         return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 2);
 553         }
 554
 555 static int old_ec_priv_decode(EVP_PKEY *pkey,
 556                                         const unsigned char **pder, int derlen)
 557         {
 558         EC_KEY *ec;
 559         if (!(ec = d2i_ECPrivateKey (NULL, pder, derlen)))
 560                 {
 561                 ECerr(EC_F_OLD_EC_PRIV_DECODE, EC_R_DECODE_ERROR);
 562                 return 0;
 563                 }
 564         EVP_PKEY_assign_EC_KEY(pkey, ec);
 565         return 1;
 566         }
 567
 568 static int old_ec_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
 569         {
 570         return i2d_ECPrivateKey(pkey->pkey.ec, pder);
 571         }
 572
 573 static int ec_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 574         {
 575         switch (op)
 576                 {
 577                 case ASN1_PKEY_CTRL_PKCS7_SIGN:
 578                 if (arg1 == 0)
 579                         {
 580                         X509_ALGOR *alg1, *alg2;
 581                         PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
 582                         X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_sha1),
 583                                                         V_ASN1_NULL, 0);
 584                         X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_ecdsa_with_SHA1),
 585                                                         V_ASN1_NULL, 0);
 586                         }
 587                 return 1;
 588
 589                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 590                 *(int *)arg2 = NID_sha1;
 591                 return 2;
 592
 593                 default:
 594                 return -2;
 595
 596                 }
 597
 598         }
 599
 600 EVP_PKEY_ASN1_METHOD eckey_asn1_meth =
 601         {
 602         EVP_PKEY_EC,
 603         EVP_PKEY_EC,
 604         0,
 605         "EC",
 606         "OpenSSL EC algorithm",
 607
 608         eckey_pub_decode,
 609         eckey_pub_encode,
 610         eckey_pub_cmp,
 611         eckey_pub_print,
 612
 613         eckey_priv_decode,
 614         eckey_priv_encode,
 615         eckey_priv_print,
 616
 617         int_ec_size,
 618         ec_bits,
 619
 620         eckey_param_decode,
 621         eckey_param_encode,
 622         ec_missing_parameters,
 623         ec_copy_parameters,
 624         ec_cmp_parameters,
 625         eckey_param_print,
 626
 627         int_ec_free,
 628         ec_pkey_ctrl,
 629         old_ec_priv_decode,
 630         old_ec_priv_encode
 631         };