crypto/ec/ec_ameth.c

   1 /* Written by Dr Stephen N Henson (steve@openssl.org) 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 <openssl/bn.h>
  63 #ifndef OPENSSL_NO_CMS
  64 #include <openssl/cms.h>
  65 #endif
  66 #include "asn1_locl.h"
  67
  68 static int eckey_param2type(int *pptype, void **ppval, EC_KEY *ec_key)
  69         {
  70         const EC_GROUP  *group;
  71         int nid;
  72         if (ec_key == NULL || (group = EC_KEY_get0_group(ec_key)) == NULL)
  73         {
  74                 ECerr(EC_F_ECKEY_PARAM2TYPE, EC_R_MISSING_PARAMETERS);
  75                 return 0;
  76         }
  77         if (EC_GROUP_get_asn1_flag(group)
  78                      && (nid = EC_GROUP_get_curve_name(group)))
  79                 /* we have a 'named curve' => just set the OID */
  80                 {
  81                 *ppval = OBJ_nid2obj(nid);
  82                 *pptype = V_ASN1_OBJECT;
  83                 }
  84         else    /* explicit parameters */
  85                 {
  86                 ASN1_STRING *pstr = NULL;
  87                 pstr = ASN1_STRING_new();
  88                 if (!pstr)
  89                         return 0;
  90                 pstr->length = i2d_ECParameters(ec_key, &pstr->data);
  91                 if (pstr->length <= 0)
  92                         {
  93                         ASN1_STRING_free(pstr);
  94                         ECerr(EC_F_ECKEY_PARAM2TYPE, ERR_R_EC_LIB);
  95                         return 0;
  96                         }
  97                 *ppval = pstr;
  98                 *pptype = V_ASN1_SEQUENCE;
  99                 }
 100         return 1;
 101         }
 102
 103 static int eckey_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
 104         {
 105         EC_KEY *ec_key = pkey->pkey.ec;
 106         void *pval = NULL;
 107         int ptype;
 108         unsigned char *penc = NULL, *p;
 109         int penclen;
 110
 111         if (!eckey_param2type(&ptype, &pval, ec_key))
 112                 {
 113                 ECerr(EC_F_ECKEY_PUB_ENCODE, ERR_R_EC_LIB);
 114                 return 0;
 115                 }
 116         penclen = i2o_ECPublicKey(ec_key, NULL);
 117         if (penclen <= 0)
 118                 goto err;
 119         penc = OPENSSL_malloc(penclen);
 120         if (!penc)
 121                 goto err;
 122         p = penc;
 123         penclen = i2o_ECPublicKey(ec_key, &p);
 124         if (penclen <= 0)
 125                 goto err;
 126         if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_EC),
 127                                 ptype, pval, penc, penclen))
 128                 return 1;
 129         err:
 130         if (ptype == V_ASN1_OBJECT)
 131                 ASN1_OBJECT_free(pval);
 132         else
 133                 ASN1_STRING_free(pval);
 134         if (penc)
 135                 OPENSSL_free(penc);
 136         return 0;
 137         }
 138
 139 static EC_KEY *eckey_type2param(int ptype, void *pval)
 140         {
 141         EC_KEY *eckey = NULL;
 142         if (ptype == V_ASN1_SEQUENCE)
 143                 {
 144                 ASN1_STRING *pstr = pval;
 145                 const unsigned char *pm = NULL;
 146                 int pmlen;
 147                 pm = pstr->data;
 148                 pmlen = pstr->length;
 149                 if (!(eckey = d2i_ECParameters(NULL, &pm, pmlen)))
 150                         {
 151                         ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR);
 152                         goto ecerr;
 153                         }
 154                 }
 155         else if (ptype == V_ASN1_OBJECT)
 156                 {
 157                 ASN1_OBJECT *poid = pval;
 158                 EC_GROUP *group;
 159
 160                 /* type == V_ASN1_OBJECT => the parameters are given
 161                  * by an asn1 OID
 162                  */
 163                 if ((eckey = EC_KEY_new()) == NULL)
 164                         {
 165                         ECerr(EC_F_ECKEY_TYPE2PARAM, ERR_R_MALLOC_FAILURE);
 166                         goto ecerr;
 167                         }
 168                 group = EC_GROUP_new_by_curve_name(OBJ_obj2nid(poid));
 169                 if (group == NULL)
 170                         goto ecerr;
 171                 EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE);
 172                 if (EC_KEY_set_group(eckey, group) == 0)
 173                         goto ecerr;
 174                 EC_GROUP_free(group);
 175                 }
 176         else
 177                 {
 178                 ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR);
 179                 goto ecerr;
 180                 }
 181
 182         return eckey;
 183
 184         ecerr:
 185         if (eckey)
 186                 EC_KEY_free(eckey);
 187         return NULL;
 188         }
 189
 190 static int eckey_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
 191         {
 192         const unsigned char *p = NULL;
 193         void *pval;
 194         int ptype, pklen;
 195         EC_KEY *eckey = NULL;
 196         X509_ALGOR *palg;
 197
 198         if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
 199                 return 0;
 200         X509_ALGOR_get0(NULL, &ptype, &pval, palg);
 201
 202         eckey = eckey_type2param(ptype, pval);
 203
 204         if (!eckey)
 205                 {
 206                 ECerr(EC_F_ECKEY_PUB_DECODE, ERR_R_EC_LIB);
 207                 return 0;
 208                 }
 209
 210         /* We have parameters now set public key */
 211         if (!o2i_ECPublicKey(&eckey, &p, pklen))
 212                 {
 213                 ECerr(EC_F_ECKEY_PUB_DECODE, EC_R_DECODE_ERROR);
 214                 goto ecerr;
 215                 }
 216
 217         EVP_PKEY_assign_EC_KEY(pkey, eckey);
 218         return 1;
 219
 220         ecerr:
 221         if (eckey)
 222                 EC_KEY_free(eckey);
 223         return 0;
 224         }
 225
 226 static int eckey_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 227         {
 228         int  r;
 229         const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);
 230         const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec),
 231                        *pb = EC_KEY_get0_public_key(b->pkey.ec);
 232         r = EC_POINT_cmp(group, pa, pb, NULL);
 233         if (r == 0)
 234                 return 1;
 235         if (r == 1)
 236                 return 0;
 237         return -2;
 238         }
 239
 240 static int eckey_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
 241         {
 242         const unsigned char *p = NULL;
 243         void *pval;
 244         int ptype, pklen;
 245         EC_KEY *eckey = NULL;
 246         X509_ALGOR *palg;
 247
 248         if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
 249                 return 0;
 250         X509_ALGOR_get0(NULL, &ptype, &pval, palg);
 251
 252         eckey = eckey_type2param(ptype, pval);
 253
 254         if (!eckey)
 255                 goto ecliberr;
 256
 257         /* We have parameters now set private key */
 258         if (!d2i_ECPrivateKey(&eckey, &p, pklen))
 259                 {
 260                 ECerr(EC_F_ECKEY_PRIV_DECODE, EC_R_DECODE_ERROR);
 261                 goto ecerr;
 262                 }
 263
 264         /* calculate public key (if necessary) */
 265         if (EC_KEY_get0_public_key(eckey) == NULL)
 266                 {
 267                 const BIGNUM *priv_key;
 268                 const EC_GROUP *group;
 269                 EC_POINT *pub_key;
 270                 /* the public key was not included in the SEC1 private
 271                  * key => calculate the public key */
 272                 group   = EC_KEY_get0_group(eckey);
 273                 pub_key = EC_POINT_new(group);
 274                 if (pub_key == NULL)
 275                         {
 276                         ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
 277                         goto ecliberr;
 278                         }
 279                 if (!EC_POINT_copy(pub_key, EC_GROUP_get0_generator(group)))
 280                         {
 281                         EC_POINT_free(pub_key);
 282                         ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
 283                         goto ecliberr;
 284                         }
 285                 priv_key = EC_KEY_get0_private_key(eckey);
 286                 if (!EC_POINT_mul(group, pub_key, priv_key, NULL, NULL, NULL))
 287                         {
 288                         EC_POINT_free(pub_key);
 289                         ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
 290                         goto ecliberr;
 291                         }
 292                 if (EC_KEY_set_public_key(eckey, pub_key) == 0)
 293                         {
 294                         EC_POINT_free(pub_key);
 295                         ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
 296                         goto ecliberr;
 297                         }
 298                 EC_POINT_free(pub_key);
 299                 }
 300
 301         EVP_PKEY_assign_EC_KEY(pkey, eckey);
 302         return 1;
 303
 304         ecliberr:
 305         ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB);
 306         ecerr:
 307         if (eckey)
 308                 EC_KEY_free(eckey);
 309         return 0;
 310         }
 311
 312 static int eckey_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
 313 {
 314         EC_KEY          *ec_key;
 315         unsigned char   *ep, *p;
 316         int             eplen, ptype;
 317         void            *pval;
 318         unsigned int    tmp_flags, old_flags;
 319
 320         ec_key = pkey->pkey.ec;
 321
 322         if (!eckey_param2type(&ptype, &pval, ec_key))
 323                 {
 324                 ECerr(EC_F_ECKEY_PRIV_ENCODE, EC_R_DECODE_ERROR);
 325                 return 0;
 326                 }
 327
 328         /* set the private key */
 329
 330         /* do not include the parameters in the SEC1 private key
 331          * see PKCS#11 12.11 */
 332         old_flags = EC_KEY_get_enc_flags(ec_key);
 333         tmp_flags = old_flags | EC_PKEY_NO_PARAMETERS;
 334         EC_KEY_set_enc_flags(ec_key, tmp_flags);
 335         eplen = i2d_ECPrivateKey(ec_key, NULL);
 336         if (!eplen)
 337         {
 338                 EC_KEY_set_enc_flags(ec_key, old_flags);
 339                 ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB);
 340                 return 0;
 341         }
 342         ep = (unsigned char *) OPENSSL_malloc(eplen);
 343         if (!ep)
 344         {
 345                 EC_KEY_set_enc_flags(ec_key, old_flags);
 346                 ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
 347                 return 0;
 348         }
 349         p = ep;
 350         if (!i2d_ECPrivateKey(ec_key, &p))
 351         {
 352                 EC_KEY_set_enc_flags(ec_key, old_flags);
 353                 OPENSSL_free(ep);
 354                 ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB);
 355                 return 0;
 356         }
 357         /* restore old encoding flags */
 358         EC_KEY_set_enc_flags(ec_key, old_flags);
 359
 360         if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), 0,
 361                                 ptype, pval, ep, eplen))
 362                 return 0;
 363
 364         return 1;
 365 }
 366
 367 static int int_ec_size(const EVP_PKEY *pkey)
 368         {
 369         return ECDSA_size(pkey->pkey.ec);
 370         }
 371
 372 static int ec_bits(const EVP_PKEY *pkey)
 373         {
 374         BIGNUM *order = BN_new();
 375         const EC_GROUP *group;
 376         int ret;
 377
 378         if (!order)
 379                 {
 380                 ERR_clear_error();
 381                 return 0;
 382                 }
 383         group = EC_KEY_get0_group(pkey->pkey.ec);
 384         if (!EC_GROUP_get_order(group, order, NULL))
 385                 {
 386                 ERR_clear_error();
 387                 return 0;
 388                 }
 389
 390         ret = BN_num_bits(order);
 391         BN_free(order);
 392         return ret;
 393         }
 394
 395 static int ec_missing_parameters(const EVP_PKEY *pkey)
 396         {
 397         if (EC_KEY_get0_group(pkey->pkey.ec) == NULL)
 398                 return 1;
 399         return 0;
 400         }
 401
 402 static int ec_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
 403         {
 404         EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec));
 405         if (group == NULL)
 406                 return 0;
 407         if (EC_KEY_set_group(to->pkey.ec, group) == 0)
 408                 return 0;
 409         EC_GROUP_free(group);
 410         return 1;
 411         }
 412
 413 static int ec_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 414         {
 415         const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec),
 416                        *group_b = EC_KEY_get0_group(b->pkey.ec);
 417         if (EC_GROUP_cmp(group_a, group_b, NULL))
 418                 return 0;
 419         else
 420                 return 1;
 421         }
 422
 423 static void int_ec_free(EVP_PKEY *pkey)
 424         {
 425         EC_KEY_free(pkey->pkey.ec);
 426         }
 427
 428 static int do_EC_KEY_print(BIO *bp, const EC_KEY *x, int off, int ktype)
 429         {
 430         unsigned char *buffer=NULL;
 431         const char *ecstr;
 432         size_t  buf_len=0, i;
 433         int     ret=0, reason=ERR_R_BIO_LIB;
 434         BIGNUM  *pub_key=NULL, *order=NULL;
 435         BN_CTX  *ctx=NULL;
 436         const EC_GROUP *group;
 437         const EC_POINT *public_key;
 438         const BIGNUM *priv_key;
 439
 440         if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL)
 441                 {
 442                 reason = ERR_R_PASSED_NULL_PARAMETER;
 443                 goto err;
 444                 }
 445
 446         ctx = BN_CTX_new();
 447         if (ctx == NULL)
 448                 {
 449                 reason = ERR_R_MALLOC_FAILURE;
 450                 goto err;
 451                 }
 452
 453         if (ktype > 0)
 454                 {
 455                 public_key = EC_KEY_get0_public_key(x);
 456                 if ((pub_key = EC_POINT_point2bn(group, public_key,
 457                         EC_KEY_get_conv_form(x), NULL, ctx)) == NULL)
 458                         {
 459                         reason = ERR_R_EC_LIB;
 460                         goto err;
 461                         }
 462                 if (pub_key)
 463                         buf_len = (size_t)BN_num_bytes(pub_key);
 464                 }
 465
 466         if (ktype == 2)
 467                 {
 468                 priv_key = EC_KEY_get0_private_key(x);
 469                 if (priv_key && (i = (size_t)BN_num_bytes(priv_key)) > buf_len)
 470                         buf_len = i;
 471                 }
 472         else
 473                 priv_key = NULL;
 474
 475         if (ktype > 0)
 476                 {
 477                 buf_len += 10;
 478                 if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
 479                         {
 480                         reason = ERR_R_MALLOC_FAILURE;
 481                         goto err;
 482                         }
 483                 }
 484         if (ktype == 2)
 485                 ecstr = "Private-Key";
 486         else if (ktype == 1)
 487                 ecstr = "Public-Key";
 488         else
 489                 ecstr = "ECDSA-Parameters";
 490
 491         if (!BIO_indent(bp, off, 128))
 492                 goto err;
 493         if ((order = BN_new()) == NULL)
 494                 goto err;
 495         if (!EC_GROUP_get_order(group, order, NULL))
 496                 goto err;
 497         if (BIO_printf(bp, "%s: (%d bit)\n", ecstr,
 498                 BN_num_bits(order)) <= 0) goto err;
 499
 500         if ((priv_key != NULL) && !ASN1_bn_print(bp, "priv:", priv_key,
 501                 buffer, off))
 502                 goto err;
 503         if ((pub_key != NULL) && !ASN1_bn_print(bp, "pub: ", pub_key,
 504                 buffer, off))
 505                 goto err;
 506         if (!ECPKParameters_print(bp, group, off))
 507                 goto err;
 508         ret=1;
 509 err:
 510         if (!ret)
 511                 ECerr(EC_F_DO_EC_KEY_PRINT, reason);
 512         if (pub_key)
 513                 BN_free(pub_key);
 514         if (order)
 515                 BN_free(order);
 516         if (ctx)
 517                 BN_CTX_free(ctx);
 518         if (buffer != NULL)
 519                 OPENSSL_free(buffer);
 520         return(ret);
 521         }
 522
 523 static int eckey_param_decode(EVP_PKEY *pkey,
 524                                         const unsigned char **pder, int derlen)
 525         {
 526         EC_KEY *eckey;
 527         if (!(eckey = d2i_ECParameters(NULL, pder, derlen)))
 528                 {
 529                 ECerr(EC_F_ECKEY_PARAM_DECODE, ERR_R_EC_LIB);
 530                 return 0;
 531                 }
 532         EVP_PKEY_assign_EC_KEY(pkey, eckey);
 533         return 1;
 534         }
 535
 536 static int eckey_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
 537         {
 538         return i2d_ECParameters(pkey->pkey.ec, pder);
 539         }
 540
 541 static int eckey_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 542                                                         ASN1_PCTX *ctx)
 543         {
 544         return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 0);
 545         }
 546
 547 static int eckey_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 548                                                         ASN1_PCTX *ctx)
 549         {
 550         return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 1);
 551         }
 552
 553
 554 static int eckey_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 555                                                         ASN1_PCTX *ctx)
 556         {
 557         return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 2);
 558         }
 559
 560 static int old_ec_priv_decode(EVP_PKEY *pkey,
 561                                         const unsigned char **pder, int derlen)
 562         {
 563         EC_KEY *ec;
 564         if (!(ec = d2i_ECPrivateKey (NULL, pder, derlen)))
 565                 {
 566                 ECerr(EC_F_OLD_EC_PRIV_DECODE, EC_R_DECODE_ERROR);
 567                 return 0;
 568                 }
 569         EVP_PKEY_assign_EC_KEY(pkey, ec);
 570         return 1;
 571         }
 572
 573 static int old_ec_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
 574         {
 575         return i2d_ECPrivateKey(pkey->pkey.ec, pder);
 576         }
 577
 578 static int ec_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 579         {
 580         switch (op)
 581                 {
 582                 case ASN1_PKEY_CTRL_PKCS7_SIGN:
 583                 if (arg1 == 0)
 584                         {
 585                         int snid, hnid;
 586                         X509_ALGOR *alg1, *alg2;
 587                         PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
 588                         if (alg1 == NULL || alg1->algorithm == NULL)
 589                                 return -1;
 590                         hnid = OBJ_obj2nid(alg1->algorithm);
 591                         if (hnid == NID_undef)
 592                                 return -1;
 593                         if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 594                                 return -1;
 595                         X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 596                         }
 597                 return 1;
 598 #ifndef OPENSSL_NO_CMS
 599                 case ASN1_PKEY_CTRL_CMS_SIGN:
 600                 if (arg1 == 0)
 601                         {
 602                         int snid, hnid;
 603                         X509_ALGOR *alg1, *alg2;
 604                         CMS_SignerInfo_get0_algs(arg2, NULL, NULL,
 605                                                                 &alg1, &alg2);
 606                         if (alg1 == NULL || alg1->algorithm == NULL)
 607                                 return -1;
 608                         hnid = OBJ_obj2nid(alg1->algorithm);
 609                         if (hnid == NID_undef)
 610                                 return -1;
 611                         if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
 612                                 return -1;
 613                         X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
 614                         }
 615                 return 1;
 616 #endif
 617
 618                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 619                 *(int *)arg2 = NID_sha1;
 620                 return 2;
 621
 622                 default:
 623                 return -2;
 624
 625                 }
 626
 627         }
 628
 629 const EVP_PKEY_ASN1_METHOD eckey_asn1_meth =
 630         {
 631         EVP_PKEY_EC,
 632         EVP_PKEY_EC,
 633         0,
 634         "EC",
 635         "OpenSSL EC algorithm",
 636
 637         eckey_pub_decode,
 638         eckey_pub_encode,
 639         eckey_pub_cmp,
 640         eckey_pub_print,
 641
 642         eckey_priv_decode,
 643         eckey_priv_encode,
 644         eckey_priv_print,
 645
 646         int_ec_size,
 647         ec_bits,
 648
 649         eckey_param_decode,
 650         eckey_param_encode,
 651         ec_missing_parameters,
 652         ec_copy_parameters,
 653         ec_cmp_parameters,
 654         eckey_param_print,
 655         0,
 656
 657         int_ec_free,
 658         ec_pkey_ctrl,
 659         old_ec_priv_decode,
 660         old_ec_priv_encode
 661         };