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                 return 0;
 123                 }
 124         param_nid = OBJ_obj2nid(gkp->key_params);
 125         GOST_KEY_PARAMS_free(gkp);
 126         EVP_PKEY_set_type(pkey,pkey_nid);
 127         switch (pkey_nid)
 128                 {
 129                 case NID_id_GostR3410_94:
 130                 case NID_id_GostR3410_94_cc:
 131                 {
 132                 DSA *dsa= EVP_PKEY_get0(pkey);
 133                 if (!dsa)
 134                         {
 135                         dsa = DSA_new();
 136                         if (!EVP_PKEY_assign(pkey,pkey_nid,dsa)) return 0;
 137                         }
 138                 if (!fill_GOST94_params(dsa,param_nid)) return 0;
 139                 break;
 140                 }
 141                 case NID_id_GostR3410_2001:
 142                 case NID_id_GostR3410_2001_cc:
 143                 {
 144                 EC_KEY *ec = EVP_PKEY_get0(pkey);
 145                 if (!ec)
 146                         {
 147                         ec = EC_KEY_new();
 148                         if (!EVP_PKEY_assign(pkey,pkey_nid,ec)) return 0;
 149                         }
 150                 if (!fill_GOST2001_params(ec,param_nid)) return 0;
 151                 }
 152                 }
 153
 154         return 1;
 155         }
 156
 157 static int gost_set_priv_key(EVP_PKEY *pkey,BIGNUM *priv)
 158         {
 159         switch (EVP_PKEY_base_id(pkey))
 160                 {
 161                 case NID_id_GostR3410_94:
 162                 case NID_id_GostR3410_94_cc:
 163                 {
 164                 DSA *dsa = EVP_PKEY_get0(pkey);
 165                 if (!dsa)
 166                         {
 167                         dsa = DSA_new();
 168                         EVP_PKEY_assign(pkey,EVP_PKEY_base_id(pkey),dsa);
 169                         }
 170                 dsa->priv_key = BN_dup(priv);
 171                 if (!EVP_PKEY_missing_parameters(pkey))
 172                         gost94_compute_public(dsa);
 173                 break;
 174                 }
 175                 case NID_id_GostR3410_2001:
 176                 case NID_id_GostR3410_2001_cc:
 177                 {
 178                 EC_KEY *ec = EVP_PKEY_get0(pkey);
 179                 if (!ec)
 180                         {
 181                         ec = EC_KEY_new();
 182                         EVP_PKEY_assign(pkey,EVP_PKEY_base_id(pkey),ec);
 183                         }
 184                 if (!EC_KEY_set_private_key(ec,priv)) return 0;
 185                 if (!EVP_PKEY_missing_parameters(pkey))
 186                         gost2001_compute_public(ec);
 187                 break;
 188                 }
 189                 }
 190         return 1;
 191         }
 192 BIGNUM* gost_get_priv_key(const EVP_PKEY *pkey)
 193         {
 194         switch (EVP_PKEY_base_id(pkey))
 195                 {
 196                 case NID_id_GostR3410_94:
 197                 case NID_id_GostR3410_94_cc:
 198                 {
 199                 DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pkey);
 200                 if (!dsa)
 201                         {
 202                         return NULL;
 203                         }
 204                 if (!dsa->priv_key) return NULL;
 205                 return BN_dup(dsa->priv_key);
 206                 break;
 207                 }
 208                 case NID_id_GostR3410_2001:
 209                 case NID_id_GostR3410_2001_cc:
 210                 {
 211                 EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pkey);
 212                 const BIGNUM* priv;
 213                 if (!ec)
 214                         {
 215                         return NULL;
 216                         }
 217                 if (!(priv=EC_KEY_get0_private_key(ec))) return NULL;
 218                 return BN_dup(priv);
 219                 break;
 220                 }
 221                 }
 222         return NULL;
 223         }
 224
 225 static int pkey_ctrl_gost(EVP_PKEY *pkey, int op,
 226         long arg1, void *arg2)
 227         {
 228         switch (op)
 229                 {
 230                 case ASN1_PKEY_CTRL_PKCS7_SIGN:
 231                         if (arg1 == 0)
 232                                 {
 233                                 X509_ALGOR *alg1 = NULL, *alg2 = NULL;
 234                                 int nid = EVP_PKEY_base_id(pkey);
 235                                 PKCS7_SIGNER_INFO_get0_algs((PKCS7_SIGNER_INFO*)arg2,
 236                                         NULL, &alg1, &alg2);
 237                                 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_id_GostR3411_94),
 238                                         V_ASN1_NULL, 0);
 239                                 if (nid == NID_undef)
 240                                         {
 241                                         return (-1);
 242                                         }
 243                                 X509_ALGOR_set0(alg2, OBJ_nid2obj(nid), V_ASN1_NULL, 0);
 244                                 }
 245                         return 1;
 246                 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
 247                         if (arg1 == 0)
 248                                 {
 249                                 X509_ALGOR *alg;
 250                                 ASN1_STRING * params = encode_gost_algor_params(pkey);
 251                                 if (!params)
 252                                         {
 253                                         return -1;
 254                                         }
 255                                 PKCS7_RECIP_INFO_get0_alg((PKCS7_RECIP_INFO*)arg2, &alg);
 256                                 X509_ALGOR_set0(alg, OBJ_nid2obj(pkey->type),
 257                                         V_ASN1_SEQUENCE, params);
 258                                 }
 259                         return 1;
 260                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 261                         *(int *)arg2 = NID_id_GostR3411_94;
 262                         return 2;
 263                 }
 264
 265         return -2;
 266         }
 267 /*----------------------- free functions * ------------------------------*/
 268 static void pkey_free_gost94(EVP_PKEY *key)
 269         {
 270         if (key->pkey.dsa)
 271                 {
 272                 DSA_free(key->pkey.dsa);
 273                 }
 274         }
 275
 276 static void pkey_free_gost01(EVP_PKEY *key)
 277         {
 278         if (key->pkey.ec)
 279                 {
 280                 EC_KEY_free(key->pkey.ec);
 281                 }
 282         }
 283
 284 /* ------------------ private key functions  -----------------------------*/
 285 static int priv_decode_gost( EVP_PKEY *pk, PKCS8_PRIV_KEY_INFO *p8inf)
 286         {
 287         const unsigned char *pkey_buf = NULL,*p=NULL;
 288         int priv_len = 0;
 289         BIGNUM *pk_num=NULL;
 290         int ret =0;
 291         X509_ALGOR *palg =NULL;
 292         ASN1_OBJECT *palg_obj = NULL;
 293         ASN1_INTEGER *priv_key=NULL;
 294
 295         if (!PKCS8_pkey_get0(&palg_obj,&pkey_buf,&priv_len,&palg,p8inf))
 296                 return 0;
 297         p = pkey_buf;
 298         if (!decode_gost_algor_params(pk,palg))
 299                 {
 300                 return 0;
 301                 }
 302         if (V_ASN1_OCTET_STRING == *p)
 303                 {
 304                 /* New format - Little endian octet string */
 305                 unsigned char rev_buf[32];
 306                 int i;
 307                 ASN1_OCTET_STRING *s = d2i_ASN1_OCTET_STRING(NULL,&p,priv_len);
 308                 if (!s||s->length !=32)
 309                         {
 310                         GOSTerr(GOST_F_PRIV_DECODE_GOST_94,
 311                                 EVP_R_DECODE_ERROR);
 312                         return 0;
 313                         }
 314                 for (i=0;i<32;i++)
 315                         {
 316                         rev_buf[31-i]=s->data[i];
 317                         }
 318                 ASN1_STRING_free(s);
 319                 pk_num = getbnfrombuf(rev_buf,32);
 320                 }
 321         else
 322                 {
 323                 priv_key=d2i_ASN1_INTEGER(NULL,&p,priv_len);
 324                 if (!priv_key || !(pk_num =  ASN1_INTEGER_to_BN(priv_key, NULL)))
 325                         {
 326                         GOSTerr(GOST_F_PRIV_DECODE_GOST_94,
 327                                 EVP_R_DECODE_ERROR);
 328                         return 0;
 329                         }
 330                 }
 331
 332         ret= gost_set_priv_key(pk,pk_num);
 333         BN_free(pk_num);
 334         return ret;
 335         }
 336
 337 /* ----------------------------------------------------------------------*/
 338 static int priv_encode_gost(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pk)
 339         {
 340         ASN1_OBJECT *algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 341         ASN1_STRING *params = encode_gost_algor_params(pk);
 342         unsigned char *priv_buf = NULL;
 343         int priv_len;
 344         BIGNUM *key;
 345
 346         ASN1_INTEGER *asn1key=NULL;
 347         if (!params)
 348                 {
 349                 return 0;
 350                 }
 351         key = gost_get_priv_key(pk);
 352         asn1key = BN_to_ASN1_INTEGER(key,NULL);
 353         BN_free(key);
 354         priv_len = i2d_ASN1_INTEGER(asn1key,&priv_buf);
 355         ASN1_INTEGER_free(asn1key);
 356         return PKCS8_pkey_set0(p8,algobj,0,V_ASN1_SEQUENCE,params,
 357                 priv_buf,priv_len);
 358         }
 359
 360 static int priv_print_gost (BIO *out,const EVP_PKEY *pkey, int indent,
 361         ASN1_PCTX *pctx)
 362         {
 363         BIGNUM *key;
 364         if (!BIO_indent(out,indent,128)) return 0;
 365         key = gost_get_priv_key(pkey);
 366         if (!key) return 0;
 367         BN_print(out,key);
 368         BN_free(key);
 369         return 1;
 370         }
 371
 372 /* ---------------------------------------------------------------------*/
 373 static int param_missing_gost94(const EVP_PKEY *pk)
 374         {
 375         const DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
 376         if (!dsa) return 1;
 377         if (!dsa->q) return 1;
 378         return 0;
 379         }
 380
 381 static int param_missing_gost01(const EVP_PKEY *pk)
 382         {
 383         const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
 384         if (!ec) return 1;
 385         if (!EC_KEY_get0_group(ec)) return 1;
 386         return 0;
 387         }
 388
 389 static int param_copy_gost94(EVP_PKEY *to, const EVP_PKEY *from)
 390         {
 391         const DSA *dfrom = EVP_PKEY_get0((EVP_PKEY *)from);
 392         DSA *dto = EVP_PKEY_get0(to);
 393         if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
 394                 {
 395                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 396                         GOST_R_INCOMPATIBLE_ALGORITHMS);
 397                 return 0;
 398                 }
 399         if (!dfrom)
 400                 {
 401                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 402                         GOST_R_KEY_PARAMETERS_MISSING);
 403                 return 0;
 404                 }
 405         if (!dto)
 406                 {
 407                 dto = DSA_new();
 408                 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),dto);
 409                 }
 410 #define COPYBIGNUM(a,b,x) if (a->x) BN_free(a->x); a->x=BN_dup(b->x);
 411         COPYBIGNUM(dto,dfrom,p)
 412                 COPYBIGNUM(dto,dfrom,q)
 413                 COPYBIGNUM(dto,dfrom,g)
 414
 415                 if (dto->priv_key)
 416                         gost94_compute_public(dto);
 417         return 1;
 418         }
 419 static int param_copy_gost01(EVP_PKEY *to, const EVP_PKEY *from)
 420         {
 421         EC_KEY *eto = EVP_PKEY_get0(to);
 422         const EC_KEY *efrom = EVP_PKEY_get0((EVP_PKEY *)from);
 423         if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
 424                 {
 425                 GOSTerr(GOST_F_PARAM_COPY_GOST01,
 426                         GOST_R_INCOMPATIBLE_ALGORITHMS);
 427                 return 0;
 428                 }
 429         if (!efrom)
 430                 {
 431                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 432                         GOST_R_KEY_PARAMETERS_MISSING);
 433                 return 0;
 434                 }
 435         if (!eto)
 436                 {
 437                 eto = EC_KEY_new();
 438                 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),eto);
 439                 }
 440         EC_KEY_set_group(eto,EC_GROUP_dup(EC_KEY_get0_group(efrom)));
 441         if (EC_KEY_get0_private_key(eto))
 442                 {
 443                 gost2001_compute_public(eto);
 444                 }
 445         return 1;
 446         }
 447
 448 static int param_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
 449         {
 450         const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
 451         const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
 452         if (!BN_cmp(da->q,db->q)) return 1;
 453         return 0;
 454         }
 455
 456 static int param_cmp_gost01(const EVP_PKEY *a, const EVP_PKEY *b)
 457         {
 458         if (EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)a)))==
 459                 EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)b))))
 460                 {
 461                 return 1;
 462                 }
 463         return 0;
 464
 465         }
 466
 467 /* ---------- Public key functions * --------------------------------------*/
 468 static int pub_decode_gost94(EVP_PKEY *pk, X509_PUBKEY *pub)
 469         {
 470         X509_ALGOR *palg = NULL;
 471         const unsigned char *pubkey_buf = NULL;
 472         unsigned char *databuf;
 473         ASN1_OBJECT *palgobj = NULL;
 474         int pub_len,i,j;
 475         DSA *dsa;
 476         ASN1_OCTET_STRING *octet= NULL;
 477
 478         if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
 479                         &palg, pub)) return 0;
 480         EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
 481         if (!decode_gost_algor_params(pk,palg)) return 0;
 482         octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
 483         if (!octet)
 484                 {
 485                 GOSTerr(GOST_F_PUB_DECODE_GOST94,ERR_R_MALLOC_FAILURE);
 486                 return 0;
 487                 }
 488         databuf = OPENSSL_malloc(octet->length);
 489         for (i=0,j=octet->length-1;i<octet->length;i++,j--)
 490                 {
 491                 databuf[j]=octet->data[i];
 492                 }
 493         dsa = EVP_PKEY_get0(pk);
 494         dsa->pub_key=BN_bin2bn(databuf,octet->length,NULL);
 495         ASN1_OCTET_STRING_free(octet);
 496         OPENSSL_free(databuf);
 497         return 1;
 498
 499         }
 500
 501 static int pub_encode_gost94(X509_PUBKEY *pub,const EVP_PKEY *pk)
 502         {
 503         ASN1_OBJECT *algobj = NULL;
 504         ASN1_OCTET_STRING *octet = NULL;
 505         void *pval = NULL;
 506         unsigned char *buf=NULL,*databuf,*sptr;
 507         int i,j,data_len,ret=0;
 508
 509         int ptype = V_ASN1_UNDEF;
 510         DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
 511         algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 512         if (pk->save_parameters)
 513                 {
 514                 ASN1_STRING *params = encode_gost_algor_params(pk);
 515                 pval = params;
 516                 ptype = V_ASN1_SEQUENCE;
 517                 }
 518         data_len = BN_num_bytes(dsa->pub_key);
 519         databuf = OPENSSL_malloc(data_len);
 520         BN_bn2bin(dsa->pub_key,databuf);
 521         octet = ASN1_OCTET_STRING_new();
 522         ASN1_STRING_set(octet,NULL,data_len);
 523         sptr = ASN1_STRING_data(octet);
 524         for (i=0,j=data_len-1; i< data_len;i++,j--)
 525                 {
 526                 sptr[i]=databuf[j];
 527                 }
 528         OPENSSL_free(databuf);
 529         ret = i2d_ASN1_OCTET_STRING(octet,&buf);
 530         ASN1_BIT_STRING_free(octet);
 531         if (ret <0)  return 0;
 532         return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
 533         }
 534
 535 static int pub_decode_gost01(EVP_PKEY *pk,X509_PUBKEY *pub)
 536         {
 537         X509_ALGOR *palg = NULL;
 538         const unsigned char *pubkey_buf = NULL;
 539         unsigned char *databuf;
 540         ASN1_OBJECT *palgobj = NULL;
 541         int pub_len,i,j;
 542         EC_POINT *pub_key;
 543         BIGNUM *X,*Y;
 544         ASN1_OCTET_STRING *octet= NULL;
 545         const EC_GROUP *group;
 546
 547         if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
 548                         &palg, pub)) return 0;
 549         EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
 550         if (!decode_gost_algor_params(pk,palg)) return 0;
 551         group = EC_KEY_get0_group(EVP_PKEY_get0(pk));
 552         octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
 553         if (!octet)
 554                 {
 555                 GOSTerr(GOST_F_PUB_DECODE_GOST94,ERR_R_MALLOC_FAILURE);
 556                 return 0;
 557                 }
 558         databuf = OPENSSL_malloc(octet->length);
 559         for (i=0,j=octet->length-1;i<octet->length;i++,j--)
 560                 {
 561                 databuf[j]=octet->data[i];
 562                 }
 563         if (EVP_PKEY_base_id(pk) == NID_id_GostR3410_2001_cc)
 564                 {
 565                 X= getbnfrombuf(databuf,octet->length/2);
 566                 Y= getbnfrombuf(databuf+(octet->length/2),octet->length/2);
 567                 }
 568         else
 569                 {
 570                 Y= getbnfrombuf(databuf,octet->length/2);
 571                 X= getbnfrombuf(databuf+(octet->length/2),octet->length/2);
 572                 }
 573         OPENSSL_free(databuf);
 574         pub_key = EC_POINT_new(group);
 575         if (!EC_POINT_set_affine_coordinates_GFp(group
 576                         ,pub_key,X,Y,NULL))
 577                 {
 578                 GOSTerr(GOST_F_PUB_DECODE_GOST01,
 579                         ERR_R_EC_LIB);
 580                 return 0;
 581                 }
 582         BN_free(X);
 583         BN_free(Y);
 584         if (!EC_KEY_set_public_key(EVP_PKEY_get0(pk),pub_key))
 585                 {
 586                 GOSTerr(GOST_F_PUB_DECODE_GOST01,
 587                         ERR_R_EC_LIB);
 588                 return 0;
 589                 }
 590         /*EC_POINT_free(pub_key);*/
 591         return 1;
 592
 593         }
 594
 595 static int pub_encode_gost01(X509_PUBKEY *pub,const EVP_PKEY *pk)
 596         {
 597         ASN1_OBJECT *algobj = NULL;
 598         ASN1_OCTET_STRING *octet = NULL;
 599         void *pval = NULL;
 600         unsigned char *buf=NULL,*databuf,*sptr;
 601         int i,j,data_len,ret=0;
 602         const EC_POINT *pub_key;
 603         BIGNUM *X,*Y,*order;
 604         const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
 605         int ptype = V_ASN1_UNDEF;
 606
 607         algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 608         if (pk->save_parameters)
 609                 {
 610                 ASN1_STRING *params = encode_gost_algor_params(pk);
 611                 pval = params;
 612                 ptype = V_ASN1_SEQUENCE;
 613                 }
 614         order = BN_new();
 615         EC_GROUP_get_order(EC_KEY_get0_group(ec),order,NULL);
 616         pub_key=EC_KEY_get0_public_key(ec);
 617         if (!pub_key)
 618                 {
 619                 GOSTerr(GOST_F_PUB_ENCODE_GOST01,
 620                         GOST_R_PUBLIC_KEY_UNDEFINED);
 621                 return 0;
 622                 }
 623         X=BN_new();
 624         Y=BN_new();
 625         EC_POINT_get_affine_coordinates_GFp(EC_KEY_get0_group(ec),
 626                 pub_key,X,Y,NULL);
 627         data_len = 2*BN_num_bytes(order);
 628         BN_free(order);
 629         databuf = OPENSSL_malloc(data_len);
 630         memset(databuf,0,data_len);
 631         if (EVP_PKEY_base_id(pk) == NID_id_GostR3410_2001_cc)
 632                 {
 633                 store_bignum(X,databuf,data_len/2);
 634                 store_bignum(Y,databuf+data_len/2,data_len/2);
 635                 }
 636         else
 637                 {
 638                 store_bignum(X,databuf+data_len/2,data_len/2);
 639                 store_bignum(Y,databuf,data_len/2);
 640                 }
 641         BN_free(X);
 642         BN_free(Y);
 643         octet = ASN1_OCTET_STRING_new();
 644         ASN1_STRING_set(octet,NULL,data_len);
 645         sptr=ASN1_STRING_data(octet);
 646     for (i=0,j=data_len-1;i<data_len;i++,j--)
 647                 {
 648         sptr[i]=databuf[j];
 649                 }
 650     OPENSSL_free(databuf);
 651         ret = i2d_ASN1_OCTET_STRING(octet,&buf);
 652         ASN1_BIT_STRING_free(octet);
 653         if (ret <0)  return 0;
 654         return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
 655         }
 656
 657 static int pub_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
 658         {
 659         const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
 660         const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
 661         if (da && db && da->pub_key && db->pub_key
 662                 && !BN_cmp(da->pub_key,db->pub_key))
 663                 {
 664                 return 1;
 665                 }
 666         return 0;
 667         }
 668
 669 static int pub_cmp_gost01(const EVP_PKEY *a,const EVP_PKEY *b)
 670         {
 671         const EC_KEY *ea = EVP_PKEY_get0((EVP_PKEY *)a);
 672         const EC_KEY *eb = EVP_PKEY_get0((EVP_PKEY *)b);
 673         const EC_POINT *ka,*kb;
 674         int ret=0;
 675         if (!ea || !eb) return 0;
 676         ka = EC_KEY_get0_public_key(ea);
 677         kb = EC_KEY_get0_public_key(eb);
 678         if (!ka || !kb) return 0;
 679         ret = (0==EC_POINT_cmp(EC_KEY_get0_group(ea),ka,kb,NULL)) ;
 680         return ret;
 681         }
 682
 683 static int pub_print_gost94(BIO *out, const EVP_PKEY *pkey, int indent,
 684         ASN1_PCTX *pctx)
 685         {
 686         const BIGNUM *key;
 687         if (!BIO_indent(out,indent,128)) return 0;
 688         key = ((DSA *)EVP_PKEY_get0((EVP_PKEY *)pkey))->pub_key;
 689         if (!key) return 0;
 690         BN_print(out,key);
 691         return 1;
 692         }
 693
 694 static int pub_print_gost01(BIO *out, const EVP_PKEY *pkey, int indent,
 695         ASN1_PCTX *pctx)
 696         {
 697         return 0;
 698         }
 699
 700 static int pkey_size_gost(const EVP_PKEY *pk)
 701         {
 702         return 64;
 703         }
 704
 705 static int pkey_bits_gost(const EVP_PKEY *pk)
 706         {
 707         return 256;
 708         }
 709
 710 /* ----------------------------------------------------------------------*/
 711 int register_ameth_gost (int nid, EVP_PKEY_ASN1_METHOD **ameth, const char* pemstr, const char* info)
 712         {
 713         *ameth =        EVP_PKEY_asn1_new(nid,
 714                 ASN1_PKEY_SIGPARAM_NULL, pemstr, info);
 715         if (!*ameth) return 0;
 716         switch (nid)
 717                 {
 718                 case NID_id_GostR3410_94_cc:
 719                 case NID_id_GostR3410_94:
 720                         EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost94);
 721                         EVP_PKEY_asn1_set_private (*ameth,
 722                                 priv_decode_gost, priv_encode_gost,
 723                                 priv_print_gost);
 724
 725                         EVP_PKEY_asn1_set_param (*ameth, 0, 0,
 726                                 param_missing_gost94, param_copy_gost94,
 727                                 param_cmp_gost94,0 );
 728                         EVP_PKEY_asn1_set_public (*ameth,
 729                                 pub_decode_gost94, pub_encode_gost94,
 730                                 pub_cmp_gost94, pub_print_gost94,
 731                                 pkey_size_gost, pkey_bits_gost);
 732
 733                         EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
 734                         break;
 735                 case NID_id_GostR3410_2001_cc:
 736                 case NID_id_GostR3410_2001:
 737                         EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost01);
 738                         EVP_PKEY_asn1_set_private (*ameth,
 739                                 priv_decode_gost, priv_encode_gost,
 740                                 priv_print_gost);
 741
 742                         EVP_PKEY_asn1_set_param (*ameth, 0, 0,
 743                                 param_missing_gost01, param_copy_gost01,
 744                                 param_cmp_gost01, 0);
 745                         EVP_PKEY_asn1_set_public (*ameth,
 746                                 pub_decode_gost01, pub_encode_gost01,
 747                                 pub_cmp_gost01, pub_print_gost01,
 748                                 pkey_size_gost, pkey_bits_gost);
 749
 750                         EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
 751                         break;
 752                 }
 753         return 1;
 754         }