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 <openssl/asn1.h>
  13 #include <string.h>
  14 #include "gost_params.h"
  15 #include "gost_lcl.h"
  16 #include "e_gost_err.h"
  17
  18 int gost94_nid_by_params(DSA *p)
  19         {
  20         R3410_params *gost_params;
  21         BIGNUM *q=BN_new();
  22         for (gost_params = R3410_paramset;gost_params->q!=NULL; gost_params++)
  23                 {
  24                 BN_dec2bn(&q,gost_params->q);
  25                 if (!BN_cmp(q,p->q))
  26                         {
  27                         BN_free(q);
  28                         return gost_params->nid;
  29                         }
  30                 }
  31         BN_free(q);
  32         return NID_undef;
  33         }
  34
  35 static ASN1_STRING  *encode_gost_algor_params(const EVP_PKEY *key)
  36         {
  37         ASN1_STRING *params = ASN1_STRING_new();
  38         GOST_KEY_PARAMS *gkp = GOST_KEY_PARAMS_new();
  39         int pkey_param_nid = NID_undef;
  40         int cipher_param_nid = NID_undef;
  41         if (!params || !gkp)
  42                 {
  43                 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
  44                         ERR_R_MALLOC_FAILURE);
  45                 ASN1_STRING_free(params);
  46                 params = NULL;
  47                 goto err;
  48                 }
  49         switch (EVP_PKEY_base_id(key))
  50                 {
  51                 case NID_id_GostR3410_2001:
  52                         pkey_param_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)key)));
  53                         cipher_param_nid = get_encryption_params(NULL)->nid;
  54                         break;
  55                 case NID_id_GostR3410_94:
  56                         pkey_param_nid = (int) gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)key));
  57                         if (pkey_param_nid == NID_undef)
  58                                 {
  59                                 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
  60                                         GOST_R_INVALID_GOST94_PARMSET);
  61                                 ASN1_STRING_free(params);
  62                                 params=NULL;
  63                                 goto err;
  64                                 }
  65                         cipher_param_nid = get_encryption_params(NULL)->nid;
  66                         break;
  67                 }
  68         gkp->key_params = OBJ_nid2obj(pkey_param_nid);
  69         gkp->hash_params = OBJ_nid2obj(NID_id_GostR3411_94_CryptoProParamSet);
  70         /*gkp->cipher_params = OBJ_nid2obj(cipher_param_nid);*/
  71         params->length = i2d_GOST_KEY_PARAMS(gkp, &params->data);
  72         if (params->length <=0 )
  73                 {
  74                 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
  75                         ERR_R_MALLOC_FAILURE);
  76                 ASN1_STRING_free(params);
  77                 params = NULL;
  78                 goto err;
  79                 }
  80         params ->type = V_ASN1_SEQUENCE;
  81         err:
  82         GOST_KEY_PARAMS_free(gkp);
  83         return params;
  84         }
  85
  86 /* Parses GOST algorithm parameters from X509_ALGOR and
  87  * modifies pkey setting NID and parameters
  88  */
  89 static int decode_gost_algor_params(EVP_PKEY *pkey, X509_ALGOR *palg)
  90         {
  91         ASN1_OBJECT *palg_obj =NULL;
  92         int ptype = V_ASN1_UNDEF;
  93         int pkey_nid = NID_undef,param_nid = NID_undef;
  94         void *_pval;
  95         ASN1_STRING *pval = NULL;
  96         const unsigned char  *p;
  97         GOST_KEY_PARAMS *gkp = NULL;
  98
  99         X509_ALGOR_get0(&palg_obj, &ptype, &_pval, palg);
 100         pval = _pval;
 101         if (ptype != V_ASN1_SEQUENCE)
 102                 {
 103                 GOSTerr(GOST_F_DECODE_GOST_ALGOR_PARAMS,
 104                         GOST_R_BAD_KEY_PARAMETERS_FORMAT);
 105                 return 0;
 106                 }
 107         p=pval->data;
 108         pkey_nid = OBJ_obj2nid(palg_obj);
 109
 110         gkp = d2i_GOST_KEY_PARAMS(NULL,&p,pval->length);
 111         if (!gkp)
 112                 {
 113                 GOSTerr(GOST_F_DECODE_GOST_ALGOR_PARAMS,
 114                         GOST_R_BAD_PKEY_PARAMETERS_FORMAT);
 115                 return 0;
 116                 }
 117         param_nid = OBJ_obj2nid(gkp->key_params);
 118         GOST_KEY_PARAMS_free(gkp);
 119         EVP_PKEY_set_type(pkey,pkey_nid);
 120         switch (pkey_nid)
 121                 {
 122                 case NID_id_GostR3410_94:
 123                 {
 124                 DSA *dsa= EVP_PKEY_get0(pkey);
 125                 if (!dsa)
 126                         {
 127                         dsa = DSA_new();
 128                         if (!EVP_PKEY_assign(pkey,pkey_nid,dsa)) return 0;
 129                         }
 130                 if (!fill_GOST94_params(dsa,param_nid)) return 0;
 131                 break;
 132                 }
 133                 case NID_id_GostR3410_2001:
 134                 {
 135                 EC_KEY *ec = EVP_PKEY_get0(pkey);
 136                 if (!ec)
 137                         {
 138                         ec = EC_KEY_new();
 139                         if (!EVP_PKEY_assign(pkey,pkey_nid,ec)) return 0;
 140                         }
 141                 if (!fill_GOST2001_params(ec,param_nid)) return 0;
 142                 }
 143                 }
 144
 145         return 1;
 146         }
 147
 148 static int gost_set_priv_key(EVP_PKEY *pkey,BIGNUM *priv)
 149         {
 150         switch (EVP_PKEY_base_id(pkey))
 151                 {
 152                 case NID_id_GostR3410_94:
 153                 {
 154                 DSA *dsa = EVP_PKEY_get0(pkey);
 155                 if (!dsa)
 156                         {
 157                         dsa = DSA_new();
 158                         EVP_PKEY_assign(pkey,EVP_PKEY_base_id(pkey),dsa);
 159                         }
 160                 dsa->priv_key = BN_dup(priv);
 161                 if (!EVP_PKEY_missing_parameters(pkey))
 162                         gost94_compute_public(dsa);
 163                 break;
 164                 }
 165                 case NID_id_GostR3410_2001:
 166                 {
 167                 EC_KEY *ec = EVP_PKEY_get0(pkey);
 168                 if (!ec)
 169                         {
 170                         ec = EC_KEY_new();
 171                         EVP_PKEY_assign(pkey,EVP_PKEY_base_id(pkey),ec);
 172                         }
 173                 if (!EC_KEY_set_private_key(ec,priv)) return 0;
 174                 if (!EVP_PKEY_missing_parameters(pkey))
 175                         gost2001_compute_public(ec);
 176                 break;
 177                 }
 178                 }
 179         return 1;
 180         }
 181 BIGNUM* gost_get0_priv_key(const EVP_PKEY *pkey)
 182         {
 183         switch (EVP_PKEY_base_id(pkey))
 184                 {
 185                 case NID_id_GostR3410_94:
 186                 {
 187                 DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pkey);
 188                 if (!dsa)
 189                         {
 190                         return NULL;
 191                         }
 192                 if (!dsa->priv_key) return NULL;
 193                 return dsa->priv_key;
 194                 break;
 195                 }
 196                 case NID_id_GostR3410_2001:
 197                 {
 198                 EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pkey);
 199                 const BIGNUM* priv;
 200                 if (!ec)
 201                         {
 202                         return NULL;
 203                         }
 204                 if (!(priv=EC_KEY_get0_private_key(ec))) return NULL;
 205                 return (BIGNUM *)priv;
 206                 break;
 207                 }
 208                 }
 209         return NULL;
 210         }
 211
 212 static int pkey_ctrl_gost(EVP_PKEY *pkey, int op,
 213         long arg1, void *arg2)
 214         {
 215         switch (op)
 216                 {
 217                 case ASN1_PKEY_CTRL_PKCS7_SIGN:
 218                         if (arg1 == 0)
 219                                 {
 220                                 X509_ALGOR *alg1 = NULL, *alg2 = NULL;
 221                                 int nid = EVP_PKEY_base_id(pkey);
 222                                 PKCS7_SIGNER_INFO_get0_algs((PKCS7_SIGNER_INFO*)arg2,
 223                                         NULL, &alg1, &alg2);
 224                                 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_id_GostR3411_94),
 225                                         V_ASN1_NULL, 0);
 226                                 if (nid == NID_undef)
 227                                         {
 228                                         return (-1);
 229                                         }
 230                                 X509_ALGOR_set0(alg2, OBJ_nid2obj(nid), V_ASN1_NULL, 0);
 231                                 }
 232                         return 1;
 233                 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
 234                         if (arg1 == 0)
 235                                 {
 236                                 X509_ALGOR *alg;
 237                                 ASN1_STRING * params = encode_gost_algor_params(pkey);
 238                                 if (!params)
 239                                         {
 240                                         return -1;
 241                                         }
 242                                 PKCS7_RECIP_INFO_get0_alg((PKCS7_RECIP_INFO*)arg2, &alg);
 243                                 X509_ALGOR_set0(alg, OBJ_nid2obj(pkey->type),
 244                                         V_ASN1_SEQUENCE, params);
 245                                 }
 246                         return 1;
 247                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 248                         *(int *)arg2 = NID_id_GostR3411_94;
 249                         return 2;
 250                 }
 251
 252         return -2;
 253         }
 254 /*----------------------- free functions * ------------------------------*/
 255 static void pkey_free_gost94(EVP_PKEY *key)
 256         {
 257         if (key->pkey.dsa)
 258                 {
 259                 DSA_free(key->pkey.dsa);
 260                 }
 261         }
 262
 263 static void pkey_free_gost01(EVP_PKEY *key)
 264         {
 265         if (key->pkey.ec)
 266                 {
 267                 EC_KEY_free(key->pkey.ec);
 268                 }
 269         }
 270
 271 /* ------------------ private key functions  -----------------------------*/
 272 static int priv_decode_gost( EVP_PKEY *pk, PKCS8_PRIV_KEY_INFO *p8inf)
 273         {
 274         const unsigned char *pkey_buf = NULL,*p=NULL;
 275         int priv_len = 0;
 276         BIGNUM *pk_num=NULL;
 277         int ret =0;
 278         X509_ALGOR *palg =NULL;
 279         ASN1_OBJECT *palg_obj = NULL;
 280         ASN1_INTEGER *priv_key=NULL;
 281
 282         if (!PKCS8_pkey_get0(&palg_obj,&pkey_buf,&priv_len,&palg,p8inf))
 283                 return 0;
 284         p = pkey_buf;
 285         if (!decode_gost_algor_params(pk,palg))
 286                 {
 287                 return 0;
 288                 }
 289         if (V_ASN1_OCTET_STRING == *p)
 290                 {
 291                 /* New format - Little endian octet string */
 292                 unsigned char rev_buf[32];
 293                 int i;
 294                 ASN1_OCTET_STRING *s = d2i_ASN1_OCTET_STRING(NULL,&p,priv_len);
 295                 if (!s||s->length !=32)
 296                         {
 297                         GOSTerr(GOST_F_PRIV_DECODE_GOST_94,
 298                                 EVP_R_DECODE_ERROR);
 299                         return 0;
 300                         }
 301                 for (i=0;i<32;i++)
 302                         {
 303                         rev_buf[31-i]=s->data[i];
 304                         }
 305                 ASN1_STRING_free(s);
 306                 pk_num = getbnfrombuf(rev_buf,32);
 307                 }
 308         else
 309                 {
 310                 priv_key=d2i_ASN1_INTEGER(NULL,&p,priv_len);
 311                 if (!priv_key) return 0;
 312                 ret= ((pk_num =  ASN1_INTEGER_to_BN(priv_key, NULL))!=NULL) ;
 313                 ASN1_INTEGER_free(priv_key);
 314                 if (!ret)
 315                         {
 316                         GOSTerr(GOST_F_PRIV_DECODE_GOST_94,
 317                                 EVP_R_DECODE_ERROR);
 318                         return 0;
 319                         }
 320                 }
 321
 322         ret= gost_set_priv_key(pk,pk_num);
 323         BN_free(pk_num);
 324         return ret;
 325         }
 326
 327 /* ----------------------------------------------------------------------*/
 328 static int priv_encode_gost(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pk)
 329         {
 330         ASN1_OBJECT *algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 331         ASN1_STRING *params = encode_gost_algor_params(pk);
 332         unsigned char *priv_buf = NULL;
 333         int priv_len;
 334
 335         ASN1_INTEGER *asn1key=NULL;
 336         if (!params)
 337                 {
 338                 return 0;
 339                 }
 340         asn1key = BN_to_ASN1_INTEGER(gost_get0_priv_key(pk),NULL);
 341         priv_len = i2d_ASN1_INTEGER(asn1key,&priv_buf);
 342         ASN1_INTEGER_free(asn1key);
 343         return PKCS8_pkey_set0(p8,algobj,0,V_ASN1_SEQUENCE,params,
 344                 priv_buf,priv_len);
 345         }
 346 /* --------- printing keys --------------------------------*/
 347 static int print_gost_94(BIO *out, const EVP_PKEY *pkey, int indent,
 348         ASN1_PCTX *pctx, int type)
 349         {
 350         int param_nid = NID_undef;
 351
 352         if (type == 2)
 353                 {
 354                 BIGNUM *key;
 355
 356                 if (!BIO_indent(out,indent,128)) return 0;
 357                 BIO_printf(out,"Private key: ");
 358                 key = gost_get0_priv_key(pkey);
 359                 if (!key)
 360                         BIO_printf(out,"<undefined>");
 361                 else
 362                         BN_print(out,key);
 363                 BIO_printf(out,"\n");
 364                 }
 365         if (type >= 1)
 366                 {
 367                 BIGNUM *pubkey;
 368
 369                 pubkey = ((DSA *)EVP_PKEY_get0((EVP_PKEY *)pkey))->pub_key;
 370                 BIO_indent(out,indent,128);
 371                 BIO_printf(out,"Public key: ");
 372                 BN_print(out,pubkey);
 373                 BIO_printf(out,"\n");
 374         }
 375
 376         param_nid = gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)pkey));
 377         BIO_indent(out,indent,128);
 378         BIO_printf(out, "Parameter set: %s\n",OBJ_nid2ln(param_nid));
 379         return 1;
 380 }
 381
 382 static int param_print_gost94(BIO *out, const EVP_PKEY *pkey, int indent,
 383         ASN1_PCTX *pctx)
 384         {
 385         return print_gost_94(out, pkey, indent, pctx,0);
 386         }
 387
 388 static int pub_print_gost94(BIO *out, const EVP_PKEY *pkey, int indent,
 389         ASN1_PCTX *pctx)
 390         {
 391         return print_gost_94(out,pkey, indent, pctx,1);
 392         }
 393 static int priv_print_gost94(BIO *out,const EVP_PKEY *pkey, int indent,
 394         ASN1_PCTX *pctx)
 395         {
 396         return print_gost_94(out,pkey,indent,pctx,2);
 397         }
 398
 399 static int print_gost_01(BIO *out, const EVP_PKEY *pkey, int indent,
 400         ASN1_PCTX *pctx, int type)
 401         {
 402         int param_nid = NID_undef;
 403         if (type == 2)
 404                 {
 405                 BIGNUM *key;
 406
 407                 if (!BIO_indent(out,indent,128)) return 0;
 408                 BIO_printf(out,"Private key: ");
 409                 key = gost_get0_priv_key(pkey);
 410                 if (!key)
 411                         BIO_printf(out,"<undefined)");
 412                 else
 413                         BN_print(out,key);
 414                 BIO_printf(out,"\n");
 415                 }
 416         if (type >=1)
 417                 {
 418                 BN_CTX *ctx = BN_CTX_new();
 419                 BIGNUM *X,*Y;
 420                 const EC_POINT *pubkey;
 421                 const EC_GROUP *group;
 422                 BN_CTX_start(ctx);
 423                 X= BN_CTX_get(ctx);
 424                 Y=BN_CTX_get(ctx);
 425                 if (!ctx)
 426                         {
 427                         GOSTerr(GOST_F_PRINT_GOST_01,ERR_R_MALLOC_FAILURE);
 428                         return 0;
 429                         }
 430                 pubkey = EC_KEY_get0_public_key((EC_KEY *)EVP_PKEY_get0((EVP_PKEY *)pkey));
 431                 group = EC_KEY_get0_group((EC_KEY *)EVP_PKEY_get0((EVP_PKEY *)pkey));
 432                 if (!EC_POINT_get_affine_coordinates_GFp(group,pubkey,X,Y,ctx))
 433                         {
 434                         GOSTerr(GOST_F_PRINT_GOST_01,ERR_R_EC_LIB);
 435                         BN_CTX_free(ctx);
 436                         return 0;
 437                         }
 438                 if (!BIO_indent(out,indent,128)) return 0;
 439                 BIO_printf(out,"Public key:\n");
 440                 if (!BIO_indent(out,indent+3,128)) return 0;
 441                 BIO_printf(out,"X:");
 442                 BN_print(out,X);
 443                 BIO_printf(out,"\n");
 444                 BIO_indent(out,indent+3,128);
 445                 BIO_printf(out,"Y:");
 446                 BN_print(out,Y);
 447                 BIO_printf(out,"\n");
 448                 BN_CTX_end(ctx);
 449                 BN_CTX_free(ctx);
 450                 }
 451
 452         param_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)pkey)));
 453         if (!BIO_indent(out,indent,128)) return 0;
 454         BIO_printf(out,"Parameter set: %s\n",OBJ_nid2ln(param_nid));
 455         return 1;
 456 }
 457 static int param_print_gost01(BIO *out, const EVP_PKEY *pkey, int indent,
 458         ASN1_PCTX *pctx)
 459         {
 460         return print_gost_01(out,pkey,indent,pctx,0);
 461         }
 462 static int pub_print_gost01(BIO *out, const EVP_PKEY *pkey, int indent,
 463         ASN1_PCTX *pctx)
 464         {
 465         return print_gost_01(out,pkey, indent, pctx,1);
 466         }
 467 static int priv_print_gost01(BIO *out,const EVP_PKEY *pkey, int indent,
 468         ASN1_PCTX *pctx)
 469         {
 470         return print_gost_01(out,pkey,indent,pctx,2);
 471         }
 472 /* ---------------------------------------------------------------------*/
 473 static int param_missing_gost94(const EVP_PKEY *pk)
 474         {
 475         const DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
 476         if (!dsa) return 1;
 477         if (!dsa->q) return 1;
 478         return 0;
 479         }
 480
 481 static int param_missing_gost01(const EVP_PKEY *pk)
 482         {
 483         const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
 484         if (!ec) return 1;
 485         if (!EC_KEY_get0_group(ec)) return 1;
 486         return 0;
 487         }
 488
 489 static int param_copy_gost94(EVP_PKEY *to, const EVP_PKEY *from)
 490         {
 491         const DSA *dfrom = EVP_PKEY_get0((EVP_PKEY *)from);
 492         DSA *dto = EVP_PKEY_get0(to);
 493         if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
 494                 {
 495                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 496                         GOST_R_INCOMPATIBLE_ALGORITHMS);
 497                 return 0;
 498                 }
 499         if (!dfrom)
 500                 {
 501                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 502                         GOST_R_KEY_PARAMETERS_MISSING);
 503                 return 0;
 504                 }
 505         if (!dto)
 506                 {
 507                 dto = DSA_new();
 508                 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),dto);
 509                 }
 510 #define COPYBIGNUM(a,b,x) if (a->x) BN_free(a->x); a->x=BN_dup(b->x);
 511         COPYBIGNUM(dto,dfrom,p)
 512                 COPYBIGNUM(dto,dfrom,q)
 513                 COPYBIGNUM(dto,dfrom,g)
 514
 515                 if (dto->priv_key)
 516                         gost94_compute_public(dto);
 517         return 1;
 518         }
 519 static int param_copy_gost01(EVP_PKEY *to, const EVP_PKEY *from)
 520         {
 521         EC_KEY *eto = EVP_PKEY_get0(to);
 522         const EC_KEY *efrom = EVP_PKEY_get0((EVP_PKEY *)from);
 523         if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
 524                 {
 525                 GOSTerr(GOST_F_PARAM_COPY_GOST01,
 526                         GOST_R_INCOMPATIBLE_ALGORITHMS);
 527                 return 0;
 528                 }
 529         if (!efrom)
 530                 {
 531                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 532                         GOST_R_KEY_PARAMETERS_MISSING);
 533                 return 0;
 534                 }
 535         if (!eto)
 536                 {
 537                 eto = EC_KEY_new();
 538                 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),eto);
 539                 }
 540         EC_KEY_set_group(eto,EC_KEY_get0_group(efrom));
 541         if (EC_KEY_get0_private_key(eto))
 542                 {
 543                 gost2001_compute_public(eto);
 544                 }
 545         return 1;
 546         }
 547
 548 static int param_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
 549         {
 550         const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
 551         const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
 552         if (!BN_cmp(da->q,db->q)) return 1;
 553         return 0;
 554         }
 555
 556 static int param_cmp_gost01(const EVP_PKEY *a, const EVP_PKEY *b)
 557         {
 558         if (EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)a)))==
 559                 EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)b))))
 560                 {
 561                 return 1;
 562                 }
 563         return 0;
 564
 565         }
 566
 567 /* ---------- Public key functions * --------------------------------------*/
 568 static int pub_decode_gost94(EVP_PKEY *pk, X509_PUBKEY *pub)
 569         {
 570         X509_ALGOR *palg = NULL;
 571         const unsigned char *pubkey_buf = NULL;
 572         unsigned char *databuf;
 573         ASN1_OBJECT *palgobj = NULL;
 574         int pub_len,i,j;
 575         DSA *dsa;
 576         ASN1_OCTET_STRING *octet= NULL;
 577
 578         if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
 579                         &palg, pub)) return 0;
 580         EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
 581         if (!decode_gost_algor_params(pk,palg)) return 0;
 582         octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
 583         if (!octet)
 584                 {
 585                 GOSTerr(GOST_F_PUB_DECODE_GOST94,ERR_R_MALLOC_FAILURE);
 586                 return 0;
 587                 }
 588         databuf = OPENSSL_malloc(octet->length);
 589         for (i=0,j=octet->length-1;i<octet->length;i++,j--)
 590                 {
 591                 databuf[j]=octet->data[i];
 592                 }
 593         dsa = EVP_PKEY_get0(pk);
 594         dsa->pub_key=BN_bin2bn(databuf,octet->length,NULL);
 595         ASN1_OCTET_STRING_free(octet);
 596         OPENSSL_free(databuf);
 597         return 1;
 598
 599         }
 600
 601 static int pub_encode_gost94(X509_PUBKEY *pub,const EVP_PKEY *pk)
 602         {
 603         ASN1_OBJECT *algobj = NULL;
 604         ASN1_OCTET_STRING *octet = NULL;
 605         void *pval = NULL;
 606         unsigned char *buf=NULL,*databuf,*sptr;
 607         int i,j,data_len,ret=0;
 608
 609         int ptype = V_ASN1_UNDEF;
 610         DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
 611         algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 612         if (pk->save_parameters)
 613                 {
 614                 ASN1_STRING *params = encode_gost_algor_params(pk);
 615                 pval = params;
 616                 ptype = V_ASN1_SEQUENCE;
 617                 }
 618         data_len = BN_num_bytes(dsa->pub_key);
 619         databuf = OPENSSL_malloc(data_len);
 620         BN_bn2bin(dsa->pub_key,databuf);
 621         octet = ASN1_OCTET_STRING_new();
 622         ASN1_STRING_set(octet,NULL,data_len);
 623         sptr = ASN1_STRING_data(octet);
 624         for (i=0,j=data_len-1; i< data_len;i++,j--)
 625                 {
 626                 sptr[i]=databuf[j];
 627                 }
 628         OPENSSL_free(databuf);
 629         ret = i2d_ASN1_OCTET_STRING(octet,&buf);
 630         ASN1_BIT_STRING_free(octet);
 631         if (ret <0)  return 0;
 632         return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
 633         }
 634
 635 static int pub_decode_gost01(EVP_PKEY *pk,X509_PUBKEY *pub)
 636         {
 637         X509_ALGOR *palg = NULL;
 638         const unsigned char *pubkey_buf = NULL;
 639         unsigned char *databuf;
 640         ASN1_OBJECT *palgobj = NULL;
 641         int pub_len,i,j;
 642         EC_POINT *pub_key;
 643         BIGNUM *X,*Y;
 644         ASN1_OCTET_STRING *octet= NULL;
 645         int len;
 646         const EC_GROUP *group;
 647
 648         if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
 649                         &palg, pub)) return 0;
 650         EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
 651         if (!decode_gost_algor_params(pk,palg)) return 0;
 652         group = EC_KEY_get0_group(EVP_PKEY_get0(pk));
 653         octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
 654         if (!octet)
 655                 {
 656                 GOSTerr(GOST_F_PUB_DECODE_GOST94,ERR_R_MALLOC_FAILURE);
 657                 return 0;
 658                 }
 659         databuf = OPENSSL_malloc(octet->length);
 660         for (i=0,j=octet->length-1;i<octet->length;i++,j--)
 661                 {
 662                 databuf[j]=octet->data[i];
 663                 }
 664         len=octet->length/2;
 665         ASN1_OCTET_STRING_free(octet);
 666
 667         Y= getbnfrombuf(databuf,len);
 668         X= getbnfrombuf(databuf+len,len);
 669         OPENSSL_free(databuf);
 670         pub_key = EC_POINT_new(group);
 671         if (!EC_POINT_set_affine_coordinates_GFp(group
 672                         ,pub_key,X,Y,NULL))
 673                 {
 674                 GOSTerr(GOST_F_PUB_DECODE_GOST01,
 675                         ERR_R_EC_LIB);
 676                 EC_POINT_free(pub_key);
 677                 BN_free(X);
 678                 BN_free(Y);
 679                 return 0;
 680                 }
 681         BN_free(X);
 682         BN_free(Y);
 683         if (!EC_KEY_set_public_key(EVP_PKEY_get0(pk),pub_key))
 684                 {
 685                 GOSTerr(GOST_F_PUB_DECODE_GOST01,
 686                         ERR_R_EC_LIB);
 687                 EC_POINT_free(pub_key);
 688                 return 0;
 689                 }
 690         EC_POINT_free(pub_key);
 691         return 1;
 692
 693         }
 694
 695 static int pub_encode_gost01(X509_PUBKEY *pub,const EVP_PKEY *pk)
 696         {
 697         ASN1_OBJECT *algobj = NULL;
 698         ASN1_OCTET_STRING *octet = NULL;
 699         void *pval = NULL;
 700         unsigned char *buf=NULL,*databuf,*sptr;
 701         int i,j,data_len,ret=0;
 702         const EC_POINT *pub_key;
 703         BIGNUM *X,*Y,*order;
 704         const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
 705         int ptype = V_ASN1_UNDEF;
 706
 707         algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 708         if (pk->save_parameters)
 709                 {
 710                 ASN1_STRING *params = encode_gost_algor_params(pk);
 711                 pval = params;
 712                 ptype = V_ASN1_SEQUENCE;
 713                 }
 714         order = BN_new();
 715         EC_GROUP_get_order(EC_KEY_get0_group(ec),order,NULL);
 716         pub_key=EC_KEY_get0_public_key(ec);
 717         if (!pub_key)
 718                 {
 719                 GOSTerr(GOST_F_PUB_ENCODE_GOST01,
 720                         GOST_R_PUBLIC_KEY_UNDEFINED);
 721                 return 0;
 722                 }
 723         X=BN_new();
 724         Y=BN_new();
 725         EC_POINT_get_affine_coordinates_GFp(EC_KEY_get0_group(ec),
 726                 pub_key,X,Y,NULL);
 727         data_len = 2*BN_num_bytes(order);
 728         BN_free(order);
 729         databuf = OPENSSL_malloc(data_len);
 730         memset(databuf,0,data_len);
 731
 732         store_bignum(X,databuf+data_len/2,data_len/2);
 733         store_bignum(Y,databuf,data_len/2);
 734
 735         BN_free(X);
 736         BN_free(Y);
 737         octet = ASN1_OCTET_STRING_new();
 738         ASN1_STRING_set(octet,NULL,data_len);
 739         sptr=ASN1_STRING_data(octet);
 740     for (i=0,j=data_len-1;i<data_len;i++,j--)
 741                 {
 742         sptr[i]=databuf[j];
 743                 }
 744     OPENSSL_free(databuf);
 745         ret = i2d_ASN1_OCTET_STRING(octet,&buf);
 746         ASN1_BIT_STRING_free(octet);
 747         if (ret <0)  return 0;
 748         return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
 749         }
 750
 751 static int pub_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
 752         {
 753         const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
 754         const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
 755         if (da && db && da->pub_key && db->pub_key
 756                 && !BN_cmp(da->pub_key,db->pub_key))
 757                 {
 758                 return 1;
 759                 }
 760         return 0;
 761         }
 762
 763 static int pub_cmp_gost01(const EVP_PKEY *a,const EVP_PKEY *b)
 764         {
 765         const EC_KEY *ea = EVP_PKEY_get0((EVP_PKEY *)a);
 766         const EC_KEY *eb = EVP_PKEY_get0((EVP_PKEY *)b);
 767         const EC_POINT *ka,*kb;
 768         int ret=0;
 769         if (!ea || !eb) return 0;
 770         ka = EC_KEY_get0_public_key(ea);
 771         kb = EC_KEY_get0_public_key(eb);
 772         if (!ka || !kb) return 0;
 773         ret = (0==EC_POINT_cmp(EC_KEY_get0_group(ea),ka,kb,NULL)) ;
 774         return ret;
 775         }
 776
 777
 778
 779
 780 static int pkey_size_gost(const EVP_PKEY *pk)
 781         {
 782         return 64;
 783         }
 784
 785 static int pkey_bits_gost(const EVP_PKEY *pk)
 786         {
 787         return 256;
 788         }
 789 /*------------------------ ASN1 METHOD for GOST MAC  -------------------*/
 790 static void  mackey_free_gost(EVP_PKEY *pk)
 791         {
 792                 if (pk->pkey.ptr) {
 793                         OPENSSL_free(pk->pkey.ptr);
 794                 }
 795         }
 796 static int mac_ctrl_gost(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 797 {
 798         switch (op)
 799                 {
 800                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 801                         *(int *)arg2 = NID_undef;
 802                         return 2;
 803                 }
 804         return -2;
 805 }
 806 /* ----------------------------------------------------------------------*/
 807 int register_ameth_gost (int nid, EVP_PKEY_ASN1_METHOD **ameth, const char* pemstr, const char* info)
 808         {
 809         *ameth =        EVP_PKEY_asn1_new(nid,
 810                 ASN1_PKEY_SIGPARAM_NULL, pemstr, info);
 811         if (!*ameth) return 0;
 812         switch (nid)
 813                 {
 814                 case NID_id_GostR3410_94:
 815                         EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost94);
 816                         EVP_PKEY_asn1_set_private (*ameth,
 817                                 priv_decode_gost, priv_encode_gost,
 818                                 priv_print_gost94);
 819
 820                         EVP_PKEY_asn1_set_param (*ameth, 0, 0,
 821                                 param_missing_gost94, param_copy_gost94,
 822                                 param_cmp_gost94,param_print_gost94 );
 823                         EVP_PKEY_asn1_set_public (*ameth,
 824                                 pub_decode_gost94, pub_encode_gost94,
 825                                 pub_cmp_gost94, pub_print_gost94,
 826                                 pkey_size_gost, pkey_bits_gost);
 827
 828                         EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
 829                         break;
 830                 case NID_id_GostR3410_2001:
 831                         EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost01);
 832                         EVP_PKEY_asn1_set_private (*ameth,
 833                                 priv_decode_gost, priv_encode_gost,
 834                                 priv_print_gost01);
 835
 836                         EVP_PKEY_asn1_set_param (*ameth, 0, 0,
 837                                 param_missing_gost01, param_copy_gost01,
 838                                 param_cmp_gost01, param_print_gost01);
 839                         EVP_PKEY_asn1_set_public (*ameth,
 840                                 pub_decode_gost01, pub_encode_gost01,
 841                                 pub_cmp_gost01, pub_print_gost01,
 842                                 pkey_size_gost, pkey_bits_gost);
 843
 844                         EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
 845                         break;
 846                 case NID_id_Gost28147_89_MAC:
 847                         EVP_PKEY_asn1_set_free(*ameth, mackey_free_gost);
 848                         EVP_PKEY_asn1_set_ctrl(*ameth,mac_ctrl_gost);
 849                         break;
 850                 }
 851         return 1;
 852         }