engines/ccgost/gost_ameth.c

   1 /**********************************************************************
   2  *                          gost_ameth.c                              *
   3  *             Copyright (c) 2005-2006 Cryptocom LTD                  *
   4  *         This file is distributed under the same license as OpenSSL *
   5  *                                                                    *
   6  *       Implementation of RFC 4490/4491 ASN1 method                  *
   7  *       for OpenSSL                                                  *
   8  *          Requires OpenSSL 0.9.9 for compilation                    *
   9  **********************************************************************/
  10 #include <openssl/engine.h>
  11 #include <openssl/evp.h>
  12 #include <string.h>
  13 #include "gost_params.h"
  14 #include "gost_lcl.h"
  15 #include "e_gost_err.h"
  16
  17 int gost94_nid_by_params(DSA *p)
  18         {
  19         R3410_params *gost_params;
  20         BIGNUM *q=BN_new();
  21         for (gost_params = R3410_paramset;gost_params->q!=NULL; gost_params++)
  22                 {
  23                 BN_dec2bn(&q,gost_params->q);
  24                 if (!BN_cmp(q,p->q))
  25                         {
  26                         BN_free(q);
  27                         return gost_params->nid;
  28                         }
  29                 }
  30         BN_free(q);
  31         return NID_undef;
  32         }
  33
  34 static ASN1_STRING  *encode_gost_algor_params(const EVP_PKEY *key)
  35         {
  36         ASN1_STRING *params = ASN1_STRING_new();
  37         GOST_KEY_PARAMS *gkp = GOST_KEY_PARAMS_new();
  38         int pkey_param_nid = NID_undef;
  39         int cipher_param_nid = NID_undef;
  40         if (!params || !gkp)
  41                 {
  42                 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
  43                         ERR_R_MALLOC_FAILURE);
  44                 ASN1_STRING_free(params);
  45                 params = NULL;
  46                 goto err;
  47                 }
  48         switch (EVP_PKEY_base_id(key))
  49                 {
  50                 case NID_id_GostR3410_2001_cc:
  51                         pkey_param_nid = NID_id_GostR3410_2001_ParamSet_cc;
  52                         cipher_param_nid = NID_id_Gost28147_89_cc;
  53                         break;
  54                 case NID_id_GostR3410_94_cc:
  55                         pkey_param_nid = NID_id_GostR3410_94_CryptoPro_A_ParamSet;
  56                         cipher_param_nid = NID_id_Gost28147_89_cc;
  57                         break;
  58                 case NID_id_GostR3410_2001:
  59                         pkey_param_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)key)));
  60                         cipher_param_nid = get_encryption_params(NULL)->nid;
  61                         break;
  62                 case NID_id_GostR3410_94:
  63                         pkey_param_nid = (int) gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)key));
  64                         if (pkey_param_nid == NID_undef)
  65                                 {
  66                                 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
  67                                         GOST_R_INVALID_GOST94_PARMSET);
  68                                 ASN1_STRING_free(params);
  69                                 params=NULL;
  70                                 goto err;
  71                                 }
  72                         cipher_param_nid = get_encryption_params(NULL)->nid;
  73                         break;
  74                 }
  75         gkp->key_params = OBJ_nid2obj(pkey_param_nid);
  76         gkp->hash_params = OBJ_nid2obj(NID_id_GostR3411_94_CryptoProParamSet);
  77         /*gkp->cipher_params = OBJ_nid2obj(cipher_param_nid);*/
  78         params->length = i2d_GOST_KEY_PARAMS(gkp, &params->data);
  79         if (params->length <=0 )
  80                 {
  81                 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
  82                         ERR_R_MALLOC_FAILURE);
  83                 ASN1_STRING_free(params);
  84                 params = NULL;
  85                 goto err;
  86                 }
  87         params ->type = V_ASN1_SEQUENCE;
  88         err:
  89         GOST_KEY_PARAMS_free(gkp);
  90         return params;
  91         }
  92
  93 /* Parses GOST algorithm parameters from X509_ALGOR and
  94  * modifies pkey setting NID and parameters
  95  */
  96 static int decode_gost_algor_params(EVP_PKEY *pkey, X509_ALGOR *palg)
  97         {
  98         ASN1_OBJECT *palg_obj =NULL;
  99         int ptype = V_ASN1_UNDEF;
 100         int pkey_nid = NID_undef,param_nid = NID_undef;
 101         void *_pval;
 102         ASN1_STRING *pval = NULL;
 103         const unsigned char  *p;
 104         GOST_KEY_PARAMS *gkp = NULL;
 105
 106         X509_ALGOR_get0(&palg_obj, &ptype, &_pval, palg);
 107         pval = _pval;
 108         if (ptype != V_ASN1_SEQUENCE)
 109                 {
 110                 GOSTerr(GOST_F_DECODE_GOST_ALGOR_PARAMS,
 111                         GOST_R_BAD_KEY_PARAMETERS_FORMAT);
 112                 return 0;
 113                 }
 114         p=pval->data;
 115         pkey_nid = OBJ_obj2nid(palg_obj);
 116
 117         gkp = d2i_GOST_KEY_PARAMS(NULL,&p,pval->length);
 118         if (!gkp)
 119                 {
 120                 GOSTerr(GOST_F_DECODE_GOST_ALGOR_PARAMS,
 121                         GOST_R_BAD_PKEY_PARAMETERS_FORMAT);
 122                 }
 123         param_nid = OBJ_obj2nid(gkp->key_params);
 124         GOST_KEY_PARAMS_free(gkp);
 125         EVP_PKEY_set_type(pkey,pkey_nid);
 126         switch (pkey_nid)
 127                 {
 128                 case NID_id_GostR3410_94:
 129                 case NID_id_GostR3410_94_cc:
 130                 {
 131                 DSA *dsa= EVP_PKEY_get0(pkey);
 132                 if (!dsa)
 133                         {
 134                         dsa = DSA_new();
 135                         if (!EVP_PKEY_assign(pkey,pkey_nid,dsa)) return 0;
 136                         }
 137                 if (!fill_GOST94_params(dsa,param_nid)) return 0;
 138                 break;
 139                 }
 140                 case NID_id_GostR3410_2001:
 141                 case NID_id_GostR3410_2001_cc:
 142                 {
 143                 EC_KEY *ec = EVP_PKEY_get0(pkey);
 144                 if (!ec)
 145                         {
 146                         ec = EC_KEY_new();
 147                         if (!EVP_PKEY_assign(pkey,pkey_nid,ec)) return 0;
 148                         }
 149                 if (!fill_GOST2001_params(ec,param_nid)) return 0;
 150                 }
 151                 }
 152
 153         return 1;
 154         }
 155
 156 static int gost_set_priv_key(EVP_PKEY *pkey,BIGNUM *priv)
 157         {
 158         switch (EVP_PKEY_base_id(pkey))
 159                 {
 160                 case NID_id_GostR3410_94:
 161                 case NID_id_GostR3410_94_cc:
 162                 {
 163                 DSA *dsa = EVP_PKEY_get0(pkey);
 164                 if (!dsa)
 165                         {
 166                         dsa = DSA_new();
 167                         EVP_PKEY_assign(pkey,EVP_PKEY_base_id(pkey),dsa);
 168                         }
 169                 dsa->priv_key = BN_dup(priv);
 170                 if (!EVP_PKEY_missing_parameters(pkey))
 171                         gost94_compute_public(dsa);
 172                 break;
 173                 }
 174                 case NID_id_GostR3410_2001:
 175                 case NID_id_GostR3410_2001_cc:
 176                 {
 177                 EC_KEY *ec = EVP_PKEY_get0(pkey);
 178                 if (!ec)
 179                         {
 180                         ec = EC_KEY_new();
 181                         EVP_PKEY_assign(pkey,EVP_PKEY_base_id(pkey),ec);
 182                         }
 183                 if (!EC_KEY_set_private_key(ec,priv)) return 0;
 184                 if (!EVP_PKEY_missing_parameters(pkey))
 185                         gost2001_compute_public(ec);
 186                 break;
 187                 }
 188                 }
 189         return 1;
 190         }
 191 BIGNUM* gost_get_priv_key(const EVP_PKEY *pkey)
 192         {
 193         switch (EVP_PKEY_base_id(pkey))
 194                 {
 195                 case NID_id_GostR3410_94:
 196                 case NID_id_GostR3410_94_cc:
 197                 {
 198                 DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pkey);
 199                 if (!dsa)
 200                         {
 201                         return NULL;
 202                         }
 203                 if (!dsa->priv_key) return NULL;
 204                 return BN_dup(dsa->priv_key);
 205                 break;
 206                 }
 207                 case NID_id_GostR3410_2001:
 208                 case NID_id_GostR3410_2001_cc:
 209                 {
 210                 EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pkey);
 211                 const BIGNUM* priv;
 212                 if (!ec)
 213                         {
 214                         return NULL;
 215                         }
 216                 if (!(priv=EC_KEY_get0_private_key(ec))) return NULL;
 217                 return BN_dup(priv);
 218                 break;
 219                 }
 220                 }
 221         return NULL;
 222         }
 223
 224 static int pkey_ctrl_gost(EVP_PKEY *pkey, int op,
 225         long arg1, void *arg2)
 226         {
 227         switch (op)
 228                 {
 229                 case ASN1_PKEY_CTRL_PKCS7_SIGN:
 230                         if (arg1 == 0)
 231                                 {
 232                                 X509_ALGOR *alg1 = NULL, *alg2 = NULL;
 233                                 int nid = EVP_PKEY_base_id(pkey);
 234                                 PKCS7_SIGNER_INFO_get0_algs((PKCS7_SIGNER_INFO*)arg2,
 235                                         NULL, &alg1, &alg2);
 236                                 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_id_GostR3411_94),
 237                                         V_ASN1_NULL, 0);
 238                                 if (nid == NID_undef)
 239                                         {
 240                                         return (-1);
 241                                         }
 242                                 X509_ALGOR_set0(alg2, OBJ_nid2obj(nid), V_ASN1_NULL, 0);
 243                                 }
 244                         return 1;
 245                 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
 246                         if (arg1 == 0)
 247                                 {
 248                                 X509_ALGOR *alg;
 249                                 ASN1_STRING * params = encode_gost_algor_params(pkey);
 250                                 if (!params)
 251                                         {
 252                                         return -1;
 253                                         }
 254                                 PKCS7_RECIP_INFO_get0_alg((PKCS7_RECIP_INFO*)arg2, &alg);
 255                                 X509_ALGOR_set0(alg, OBJ_nid2obj(pkey->type),
 256                                         V_ASN1_SEQUENCE, params);
 257                                 }
 258                         return 1;
 259                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 260                         *(int *)arg2 = NID_id_GostR3411_94;
 261                         return 2;
 262                 }
 263
 264         return -2;
 265         }
 266 /*----------------------- free functions * ------------------------------*/
 267 static void pkey_free_gost94(EVP_PKEY *key)
 268         {
 269         if (key->pkey.dsa)
 270                 {
 271                 DSA_free(key->pkey.dsa);
 272                 }
 273         }
 274
 275 static void pkey_free_gost01(EVP_PKEY *key)
 276         {
 277         if (key->pkey.ec)
 278                 {
 279                 EC_KEY_free(key->pkey.ec);
 280                 }
 281         }
 282
 283 /* ------------------ private key functions  -----------------------------*/
 284 static int priv_decode_gost( EVP_PKEY *pk, PKCS8_PRIV_KEY_INFO *p8inf)
 285         {
 286         const unsigned char *pkey_buf = NULL,*p=NULL;
 287         int priv_len = 0;
 288         BIGNUM *pk_num=NULL;
 289         int ret =0;
 290         X509_ALGOR *palg =NULL;
 291         ASN1_OBJECT *palg_obj = NULL;
 292         ASN1_INTEGER *priv_key=NULL;
 293
 294         if (!PKCS8_pkey_get0(&palg_obj,&pkey_buf,&priv_len,&palg,p8inf))
 295                 return 0;
 296         p = pkey_buf;
 297         if (!decode_gost_algor_params(pk,palg))
 298                 {
 299                 return 0;
 300                 }
 301         if (V_ASN1_OCTET_STRING == *p)
 302                 {
 303                 /* New format - Little endian octet string */
 304                 unsigned char rev_buf[32];
 305                 int i;
 306                 ASN1_OCTET_STRING *s = d2i_ASN1_OCTET_STRING(NULL,&p,priv_len);
 307                 if (!s||s->length !=32)
 308                         {
 309                         GOSTerr(GOST_F_PRIV_DECODE_GOST_94,
 310                                 EVP_R_DECODE_ERROR);
 311                         return 0;
 312                         }
 313                 for (i=0;i<32;i++)
 314                         {
 315                         rev_buf[31-i]=s->data[i];
 316                         }
 317                 ASN1_STRING_free(s);
 318                 pk_num = getbnfrombuf(rev_buf,32);
 319                 }
 320         else
 321                 {
 322                 priv_key=d2i_ASN1_INTEGER(NULL,&p,priv_len);
 323                 if (!priv_key || !(pk_num =  ASN1_INTEGER_to_BN(priv_key, NULL)))
 324                         {
 325                         GOSTerr(GOST_F_PRIV_DECODE_GOST_94,
 326                                 EVP_R_DECODE_ERROR);
 327                         return 0;
 328                         }
 329                 }
 330
 331         ret= gost_set_priv_key(pk,pk_num);
 332         BN_free(pk_num);
 333         return ret;
 334         }
 335
 336 /* ----------------------------------------------------------------------*/
 337 static int priv_encode_gost(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pk)
 338         {
 339         ASN1_OBJECT *algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 340         ASN1_STRING *params = encode_gost_algor_params(pk);
 341         unsigned char *priv_buf = NULL;
 342         int priv_len;
 343         BIGNUM *key;
 344
 345         ASN1_INTEGER *asn1key=NULL;
 346         if (!params)
 347                 {
 348                 return 0;
 349                 }
 350         key = gost_get_priv_key(pk);
 351         asn1key = BN_to_ASN1_INTEGER(key,NULL);
 352         BN_free(key);
 353         priv_len = i2d_ASN1_INTEGER(asn1key,&priv_buf);
 354         ASN1_INTEGER_free(asn1key);
 355         return PKCS8_pkey_set0(p8,algobj,0,V_ASN1_SEQUENCE,params,
 356                 priv_buf,priv_len);
 357         }
 358
 359 static int priv_print_gost (BIO *out,const EVP_PKEY *pkey, int indent,
 360         ASN1_PCTX *pctx)
 361         {
 362         BIGNUM *key;
 363         if (!BIO_indent(out,indent,128)) return 0;
 364         key = gost_get_priv_key(pkey);
 365         if (!key) return 0;
 366         BN_print(out,key);
 367         BN_free(key);
 368         return 1;
 369         }
 370
 371 /* ---------------------------------------------------------------------*/
 372 static int param_missing_gost94(const EVP_PKEY *pk)
 373         {
 374         const DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
 375         if (!dsa) return 1;
 376         if (!dsa->q) return 1;
 377         return 0;
 378         }
 379
 380 static int param_missing_gost01(const EVP_PKEY *pk)
 381         {
 382         const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
 383         if (!ec) return 1;
 384         if (!EC_KEY_get0_group(ec)) return 1;
 385         return 0;
 386         }
 387
 388 static int param_copy_gost94(EVP_PKEY *to, const EVP_PKEY *from)
 389         {
 390         const DSA *dfrom = EVP_PKEY_get0((EVP_PKEY *)from);
 391         DSA *dto = EVP_PKEY_get0(to);
 392         if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
 393                 {
 394                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 395                         GOST_R_INCOMPATIBLE_ALGORITHMS);
 396                 return 0;
 397                 }
 398         if (!dfrom)
 399                 {
 400                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 401                         GOST_R_KEY_PARAMETERS_MISSING);
 402                 return 0;
 403                 }
 404         if (!dto)
 405                 {
 406                 dto = DSA_new();
 407                 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),dto);
 408                 }
 409 #define COPYBIGNUM(a,b,x) if (a->x) BN_free(a->x); a->x=BN_dup(b->x);
 410         COPYBIGNUM(dto,dfrom,p)
 411                 COPYBIGNUM(dto,dfrom,q)
 412                 COPYBIGNUM(dto,dfrom,g)
 413
 414                 if (dto->priv_key)
 415                         gost94_compute_public(dto);
 416         return 1;
 417         }
 418 static int param_copy_gost01(EVP_PKEY *to, const EVP_PKEY *from)
 419         {
 420         EC_KEY *eto = EVP_PKEY_get0(to);
 421         const EC_KEY *efrom = EVP_PKEY_get0((EVP_PKEY *)from);
 422         if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
 423                 {
 424                 GOSTerr(GOST_F_PARAM_COPY_GOST01,
 425                         GOST_R_INCOMPATIBLE_ALGORITHMS);
 426                 return 0;
 427                 }
 428         if (!efrom)
 429                 {
 430                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 431                         GOST_R_KEY_PARAMETERS_MISSING);
 432                 return 0;
 433                 }
 434         if (!eto)
 435                 {
 436                 eto = EC_KEY_new();
 437                 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),eto);
 438                 }
 439         EC_KEY_set_group(eto,EC_GROUP_dup(EC_KEY_get0_group(efrom)));
 440         if (EC_KEY_get0_private_key(eto))
 441                 {
 442                 gost2001_compute_public(eto);
 443                 }
 444         return 1;
 445         }
 446
 447 static int param_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
 448         {
 449         const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
 450         const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
 451         if (!BN_cmp(da->q,db->q)) return 1;
 452         return 0;
 453         }
 454
 455 static int param_cmp_gost01(const EVP_PKEY *a, const EVP_PKEY *b)
 456         {
 457         if (EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)a)))==
 458                 EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)b))))
 459                 {
 460                 return 1;
 461                 }
 462         return 0;
 463
 464         }
 465
 466 /* ---------- Public key functions * --------------------------------------*/
 467 static int pub_decode_gost94(EVP_PKEY *pk, X509_PUBKEY *pub)
 468         {
 469         X509_ALGOR *palg = NULL;
 470         const unsigned char *pubkey_buf = NULL;
 471         unsigned char *databuf;
 472         ASN1_OBJECT *palgobj = NULL;
 473         int pub_len,i,j;
 474         DSA *dsa;
 475         ASN1_OCTET_STRING *octet= NULL;
 476
 477         if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
 478                         &palg, pub)) return 0;
 479         EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
 480         if (!decode_gost_algor_params(pk,palg)) return 0;
 481         octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
 482         if (!octet)
 483                 {
 484                 GOSTerr(GOST_F_PUB_DECODE_GOST94,ERR_R_MALLOC_FAILURE);
 485                 return 0;
 486                 }
 487         databuf = OPENSSL_malloc(octet->length);
 488         for (i=0,j=octet->length-1;i<octet->length;i++,j--)
 489                 {
 490                 databuf[j]=octet->data[i];
 491                 }
 492         dsa = EVP_PKEY_get0(pk);
 493         dsa->pub_key=BN_bin2bn(databuf,octet->length,NULL);
 494         ASN1_OCTET_STRING_free(octet);
 495         OPENSSL_free(databuf);
 496         return 1;
 497
 498         }
 499
 500 static int pub_encode_gost94(X509_PUBKEY *pub,const EVP_PKEY *pk)
 501         {
 502         ASN1_OBJECT *algobj = NULL;
 503         ASN1_OCTET_STRING *octet = NULL;
 504         void *pval = NULL;
 505         unsigned char *buf=NULL,*databuf,*sptr;
 506         int i,j,data_len,ret=0;
 507
 508         int ptype = V_ASN1_UNDEF;
 509         DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
 510         algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 511         if (pk->save_parameters)
 512                 {
 513                 ASN1_STRING *params = encode_gost_algor_params(pk);
 514                 pval = params;
 515                 ptype = V_ASN1_SEQUENCE;
 516                 }
 517         data_len = BN_num_bytes(dsa->pub_key);
 518         databuf = OPENSSL_malloc(data_len);
 519         BN_bn2bin(dsa->pub_key,databuf);
 520         octet = ASN1_OCTET_STRING_new();
 521         ASN1_STRING_set(octet,NULL,data_len);
 522         sptr = ASN1_STRING_data(octet);
 523         for (i=0,j=data_len-1; i< data_len;i++,j--)
 524                 {
 525                 sptr[i]=databuf[j];
 526                 }
 527         OPENSSL_free(databuf);
 528         ret = i2d_ASN1_OCTET_STRING(octet,&buf);
 529         ASN1_BIT_STRING_free(octet);
 530         if (ret <0)  return 0;
 531         return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
 532         }
 533
 534 static int pub_decode_gost01(EVP_PKEY *pk,X509_PUBKEY *pub)
 535         {
 536         X509_ALGOR *palg = NULL;
 537         const unsigned char *pubkey_buf = NULL;
 538         unsigned char *databuf;
 539         ASN1_OBJECT *palgobj = NULL;
 540         int pub_len,i,j;
 541         EC_POINT *pub_key;
 542         BIGNUM *X,*Y;
 543         ASN1_OCTET_STRING *octet= NULL;
 544         const EC_GROUP *group;
 545
 546         if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
 547                         &palg, pub)) return 0;
 548         EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
 549         if (!decode_gost_algor_params(pk,palg)) return 0;
 550         group = EC_KEY_get0_group(EVP_PKEY_get0(pk));
 551         octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
 552         if (!octet)
 553                 {
 554                 GOSTerr(GOST_F_PUB_DECODE_GOST94,ERR_R_MALLOC_FAILURE);
 555                 return 0;
 556                 }
 557         databuf = OPENSSL_malloc(octet->length);
 558         for (i=0,j=octet->length-1;i<octet->length;i++,j--)
 559                 {
 560                 databuf[j]=octet->data[i];
 561                 }
 562         if (EVP_PKEY_base_id(pk) == NID_id_GostR3410_2001_cc)
 563                 {
 564                 X= getbnfrombuf(databuf,octet->length/2);
 565                 Y= getbnfrombuf(databuf+(octet->length/2),octet->length/2);
 566                 }
 567         else
 568                 {
 569                 Y= getbnfrombuf(databuf,octet->length/2);
 570                 X= getbnfrombuf(databuf+(octet->length/2),octet->length/2);
 571                 }
 572         OPENSSL_free(databuf);
 573         pub_key = EC_POINT_new(group);
 574         if (!EC_POINT_set_affine_coordinates_GFp(group
 575                         ,pub_key,X,Y,NULL))
 576                 {
 577                 GOSTerr(GOST_F_PUB_DECODE_GOST01,
 578                         ERR_R_EC_LIB);
 579                 return 0;
 580                 }
 581         BN_free(X);
 582         BN_free(Y);
 583         if (!EC_KEY_set_public_key(EVP_PKEY_get0(pk),pub_key))
 584                 {
 585                 GOSTerr(GOST_F_PUB_DECODE_GOST01,
 586                         ERR_R_EC_LIB);
 587                 return 0;
 588                 }
 589         /*EC_POINT_free(pub_key);*/
 590         return 1;
 591
 592         }
 593
 594 static int pub_encode_gost01(X509_PUBKEY *pub,const EVP_PKEY *pk)
 595         {
 596         ASN1_OBJECT *algobj = NULL;
 597         ASN1_OCTET_STRING *octet = NULL;
 598         void *pval = NULL;
 599         unsigned char *buf=NULL,*databuf,*sptr;
 600         int i,j,data_len,ret=0;
 601         const EC_POINT *pub_key;
 602         BIGNUM *X,*Y,*order;
 603         const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
 604         int ptype = V_ASN1_UNDEF;
 605
 606         algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 607         if (pk->save_parameters)
 608                 {
 609                 ASN1_STRING *params = encode_gost_algor_params(pk);
 610                 pval = params;
 611                 ptype = V_ASN1_SEQUENCE;
 612                 }
 613         order = BN_new();
 614         EC_GROUP_get_order(EC_KEY_get0_group(ec),order,NULL);
 615         pub_key=EC_KEY_get0_public_key(ec);
 616         if (!pub_key)
 617                 {
 618                 GOSTerr(GOST_F_PUB_ENCODE_GOST01,
 619                         GOST_R_PUBLIC_KEY_UNDEFINED);
 620                 return 0;
 621                 }
 622         X=BN_new();
 623         Y=BN_new();
 624         EC_POINT_get_affine_coordinates_GFp(EC_KEY_get0_group(ec),
 625                 pub_key,X,Y,NULL);
 626         data_len = 2*BN_num_bytes(order);
 627         BN_free(order);
 628         databuf = OPENSSL_malloc(data_len);
 629         memset(databuf,0,data_len);
 630         if (EVP_PKEY_base_id(pk) == NID_id_GostR3410_2001_cc)
 631                 {
 632                 store_bignum(X,databuf,data_len/2);
 633                 store_bignum(Y,databuf+data_len/2,data_len/2);
 634                 }
 635         else
 636                 {
 637                 store_bignum(X,databuf+data_len/2,data_len/2);
 638                 store_bignum(Y,databuf,data_len/2);
 639                 }
 640         BN_free(X);
 641         BN_free(Y);
 642         octet = ASN1_OCTET_STRING_new();
 643         ASN1_STRING_set(octet,NULL,data_len);
 644         sptr=ASN1_STRING_data(octet);
 645     for (i=0,j=data_len-1;i<data_len;i++,j--)
 646                 {
 647         sptr[i]=databuf[j];
 648                 }
 649     OPENSSL_free(databuf);
 650         ret = i2d_ASN1_OCTET_STRING(octet,&buf);
 651         ASN1_BIT_STRING_free(octet);
 652         if (ret <0)  return 0;
 653         return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
 654         }
 655
 656 static int pub_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
 657         {
 658         const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
 659         const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
 660         if (da && db && da->pub_key && db->pub_key
 661                 && !BN_cmp(da->pub_key,db->pub_key))
 662                 {
 663                 return 1;
 664                 }
 665         return 0;
 666         }
 667
 668 static int pub_cmp_gost01(const EVP_PKEY *a,const EVP_PKEY *b)
 669         {
 670         const EC_KEY *ea = EVP_PKEY_get0((EVP_PKEY *)a);
 671         const EC_KEY *eb = EVP_PKEY_get0((EVP_PKEY *)b);
 672         const EC_POINT *ka,*kb;
 673         int ret=0;
 674         if (!ea || !eb) return 0;
 675         ka = EC_KEY_get0_public_key(ea);
 676         kb = EC_KEY_get0_public_key(eb);
 677         if (!ka || !kb) return 0;
 678         ret = (0==EC_POINT_cmp(EC_KEY_get0_group(ea),ka,kb,NULL)) ;
 679         return ret;
 680         }
 681
 682 static int pub_print_gost94(BIO *out, const EVP_PKEY *pkey, int indent,
 683         ASN1_PCTX *pctx)
 684         {
 685         const BIGNUM *key;
 686         if (!BIO_indent(out,indent,128)) return 0;
 687         key = ((DSA *)EVP_PKEY_get0((EVP_PKEY *)pkey))->pub_key;
 688         if (!key) return 0;
 689         BN_print(out,key);
 690         return 1;
 691         }
 692
 693 static int pub_print_gost01(BIO *out, const EVP_PKEY *pkey, int indent,
 694         ASN1_PCTX *pctx)
 695         {
 696         return 0;
 697         }
 698
 699 static int pkey_size_gost(const EVP_PKEY *pk)
 700         {
 701         return 64;
 702         }
 703
 704 static int pkey_bits_gost(const EVP_PKEY *pk)
 705         {
 706         return 256;
 707         }
 708
 709 /* ----------------------------------------------------------------------*/
 710 int register_ameth_gost (int nid, EVP_PKEY_ASN1_METHOD **ameth, const char* pemstr, const char* info)
 711         {
 712         *ameth =        EVP_PKEY_asn1_new(nid,
 713                 ASN1_PKEY_SIGPARAM_NULL, pemstr, info);
 714         if (!*ameth) return 0;
 715         switch (nid)
 716                 {
 717                 case NID_id_GostR3410_94_cc:
 718                 case NID_id_GostR3410_94:
 719                         EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost94);
 720                         EVP_PKEY_asn1_set_private (*ameth,
 721                                 priv_decode_gost, priv_encode_gost,
 722                                 priv_print_gost);
 723
 724                         EVP_PKEY_asn1_set_param (*ameth, 0, 0,
 725                                 param_missing_gost94, param_copy_gost94,
 726                                 param_cmp_gost94,0 );
 727                         EVP_PKEY_asn1_set_public (*ameth,
 728                                 pub_decode_gost94, pub_encode_gost94,
 729                                 pub_cmp_gost94, pub_print_gost94,
 730                                 pkey_size_gost, pkey_bits_gost);
 731
 732                         EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
 733                         break;
 734                 case NID_id_GostR3410_2001_cc:
 735                 case NID_id_GostR3410_2001:
 736                         EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost01);
 737                         EVP_PKEY_asn1_set_private (*ameth,
 738                                 priv_decode_gost, priv_encode_gost,
 739                                 priv_print_gost);
 740
 741                         EVP_PKEY_asn1_set_param (*ameth, 0, 0,
 742                                 param_missing_gost01, param_copy_gost01,
 743                                 param_cmp_gost01, 0);
 744                         EVP_PKEY_asn1_set_public (*ameth,
 745                                 pub_decode_gost01, pub_encode_gost01,
 746                                 pub_cmp_gost01, pub_print_gost01,
 747                                 pkey_size_gost, pkey_bits_gost);
 748
 749                         EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
 750                         break;
 751                 }
 752         return 1;
 753         }