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 <string.h>
  11 #include <openssl/crypto.h>
  12 #include <openssl/err.h>
  13 #include <openssl/engine.h>
  14 #include <openssl/evp.h>
  15 #include <openssl/asn1.h>
  16 #include "gost_params.h"
  17 #include "gost_lcl.h"
  18 #include "e_gost_err.h"
  19
  20 int gost94_nid_by_params(DSA *p)
  21         {
  22         R3410_params *gost_params;
  23         BIGNUM *q=BN_new();
  24         for (gost_params = R3410_paramset;gost_params->q!=NULL; gost_params++)
  25                 {
  26                 BN_dec2bn(&q,gost_params->q);
  27                 if (!BN_cmp(q,p->q))
  28                         {
  29                         BN_free(q);
  30                         return gost_params->nid;
  31                         }
  32                 }
  33         BN_free(q);
  34         return NID_undef;
  35         }
  36
  37 static ASN1_STRING  *encode_gost_algor_params(const EVP_PKEY *key)
  38         {
  39         ASN1_STRING *params = ASN1_STRING_new();
  40         GOST_KEY_PARAMS *gkp = GOST_KEY_PARAMS_new();
  41         int pkey_param_nid = NID_undef;
  42         int cipher_param_nid = NID_undef;
  43         if (!params || !gkp)
  44                 {
  45                 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
  46                         ERR_R_MALLOC_FAILURE);
  47                 ASN1_STRING_free(params);
  48                 params = NULL;
  49                 goto err;
  50                 }
  51         switch (EVP_PKEY_base_id(key))
  52                 {
  53                 case NID_id_GostR3410_2001:
  54                         pkey_param_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)key)));
  55                         cipher_param_nid = get_encryption_params(NULL)->nid;
  56                         break;
  57                 case NID_id_GostR3410_94:
  58                         pkey_param_nid = (int) gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)key));
  59                         if (pkey_param_nid == NID_undef)
  60                                 {
  61                                 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
  62                                         GOST_R_INVALID_GOST94_PARMSET);
  63                                 ASN1_STRING_free(params);
  64                                 params=NULL;
  65                                 goto err;
  66                                 }
  67                         cipher_param_nid = get_encryption_params(NULL)->nid;
  68                         break;
  69                 }
  70         gkp->key_params = OBJ_nid2obj(pkey_param_nid);
  71         gkp->hash_params = OBJ_nid2obj(NID_id_GostR3411_94_CryptoProParamSet);
  72         /*gkp->cipher_params = OBJ_nid2obj(cipher_param_nid);*/
  73         params->length = i2d_GOST_KEY_PARAMS(gkp, &params->data);
  74         if (params->length <=0 )
  75                 {
  76                 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
  77                         ERR_R_MALLOC_FAILURE);
  78                 ASN1_STRING_free(params);
  79                 params = NULL;
  80                 goto err;
  81                 }
  82         params ->type = V_ASN1_SEQUENCE;
  83         err:
  84         GOST_KEY_PARAMS_free(gkp);
  85         return params;
  86         }
  87
  88 /* Parses GOST algorithm parameters from X509_ALGOR and
  89  * modifies pkey setting NID and parameters
  90  */
  91 static int decode_gost_algor_params(EVP_PKEY *pkey, X509_ALGOR *palg)
  92         {
  93         ASN1_OBJECT *palg_obj =NULL;
  94         int ptype = V_ASN1_UNDEF;
  95         int pkey_nid = NID_undef,param_nid = NID_undef;
  96         void *_pval;
  97         ASN1_STRING *pval = NULL;
  98         const unsigned char  *p;
  99         GOST_KEY_PARAMS *gkp = NULL;
 100
 101         X509_ALGOR_get0(&palg_obj, &ptype, &_pval, palg);
 102         pval = _pval;
 103         if (ptype != V_ASN1_SEQUENCE)
 104                 {
 105                 GOSTerr(GOST_F_DECODE_GOST_ALGOR_PARAMS,
 106                         GOST_R_BAD_KEY_PARAMETERS_FORMAT);
 107                 return 0;
 108                 }
 109         p=pval->data;
 110         pkey_nid = OBJ_obj2nid(palg_obj);
 111
 112         gkp = d2i_GOST_KEY_PARAMS(NULL,&p,pval->length);
 113         if (!gkp)
 114                 {
 115                 GOSTerr(GOST_F_DECODE_GOST_ALGOR_PARAMS,
 116                         GOST_R_BAD_PKEY_PARAMETERS_FORMAT);
 117                 return 0;
 118                 }
 119         param_nid = OBJ_obj2nid(gkp->key_params);
 120         GOST_KEY_PARAMS_free(gkp);
 121         EVP_PKEY_set_type(pkey,pkey_nid);
 122         switch (pkey_nid)
 123                 {
 124                 case NID_id_GostR3410_94:
 125                 {
 126                 DSA *dsa= EVP_PKEY_get0(pkey);
 127                 if (!dsa)
 128                         {
 129                         dsa = DSA_new();
 130                         if (!EVP_PKEY_assign(pkey,pkey_nid,dsa)) return 0;
 131                         }
 132                 if (!fill_GOST94_params(dsa,param_nid)) return 0;
 133                 break;
 134                 }
 135                 case NID_id_GostR3410_2001:
 136                 {
 137                 EC_KEY *ec = EVP_PKEY_get0(pkey);
 138                 if (!ec)
 139                         {
 140                         ec = EC_KEY_new();
 141                         if (!EVP_PKEY_assign(pkey,pkey_nid,ec)) return 0;
 142                         }
 143                 if (!fill_GOST2001_params(ec,param_nid)) return 0;
 144                 }
 145                 }
 146
 147         return 1;
 148         }
 149
 150 static int gost_set_priv_key(EVP_PKEY *pkey,BIGNUM *priv)
 151         {
 152         switch (EVP_PKEY_base_id(pkey))
 153                 {
 154                 case NID_id_GostR3410_94:
 155                 {
 156                 DSA *dsa = EVP_PKEY_get0(pkey);
 157                 if (!dsa)
 158                         {
 159                         dsa = DSA_new();
 160                         EVP_PKEY_assign(pkey,EVP_PKEY_base_id(pkey),dsa);
 161                         }
 162                 dsa->priv_key = BN_dup(priv);
 163                 if (!EVP_PKEY_missing_parameters(pkey))
 164                         gost94_compute_public(dsa);
 165                 break;
 166                 }
 167                 case NID_id_GostR3410_2001:
 168                 {
 169                 EC_KEY *ec = EVP_PKEY_get0(pkey);
 170                 if (!ec)
 171                         {
 172                         ec = EC_KEY_new();
 173                         EVP_PKEY_assign(pkey,EVP_PKEY_base_id(pkey),ec);
 174                         }
 175                 if (!EC_KEY_set_private_key(ec,priv)) return 0;
 176                 if (!EVP_PKEY_missing_parameters(pkey))
 177                         gost2001_compute_public(ec);
 178                 break;
 179                 }
 180                 }
 181         return 1;
 182         }
 183 BIGNUM* gost_get0_priv_key(const EVP_PKEY *pkey)
 184         {
 185         switch (EVP_PKEY_base_id(pkey))
 186                 {
 187                 case NID_id_GostR3410_94:
 188                 {
 189                 DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pkey);
 190                 if (!dsa)
 191                         {
 192                         return NULL;
 193                         }
 194                 if (!dsa->priv_key) return NULL;
 195                 return dsa->priv_key;
 196                 break;
 197                 }
 198                 case NID_id_GostR3410_2001:
 199                 {
 200                 EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pkey);
 201                 const BIGNUM* priv;
 202                 if (!ec)
 203                         {
 204                         return NULL;
 205                         }
 206                 if (!(priv=EC_KEY_get0_private_key(ec))) return NULL;
 207                 return (BIGNUM *)priv;
 208                 break;
 209                 }
 210                 }
 211         return NULL;
 212         }
 213
 214 static int pkey_ctrl_gost(EVP_PKEY *pkey, int op,
 215         long arg1, void *arg2)
 216         {
 217         switch (op)
 218                 {
 219                 case ASN1_PKEY_CTRL_PKCS7_SIGN:
 220                         if (arg1 == 0)
 221                                 {
 222                                 X509_ALGOR *alg1 = NULL, *alg2 = NULL;
 223                                 int nid = EVP_PKEY_base_id(pkey);
 224                                 PKCS7_SIGNER_INFO_get0_algs((PKCS7_SIGNER_INFO*)arg2,
 225                                         NULL, &alg1, &alg2);
 226                                 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_id_GostR3411_94),
 227                                         V_ASN1_NULL, 0);
 228                                 if (nid == NID_undef)
 229                                         {
 230                                         return (-1);
 231                                         }
 232                                 X509_ALGOR_set0(alg2, OBJ_nid2obj(nid), V_ASN1_NULL, 0);
 233                                 }
 234                         return 1;
 235                 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
 236                         if (arg1 == 0)
 237                                 {
 238                                 X509_ALGOR *alg;
 239                                 ASN1_STRING * params = encode_gost_algor_params(pkey);
 240                                 if (!params)
 241                                         {
 242                                         return -1;
 243                                         }
 244                                 PKCS7_RECIP_INFO_get0_alg((PKCS7_RECIP_INFO*)arg2, &alg);
 245                                 X509_ALGOR_set0(alg, OBJ_nid2obj(pkey->type),
 246                                         V_ASN1_SEQUENCE, params);
 247                                 }
 248                         return 1;
 249                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 250                         *(int *)arg2 = NID_id_GostR3411_94;
 251                         return 2;
 252                 }
 253
 254         return -2;
 255         }
 256 /*----------------------- free functions * ------------------------------*/
 257 static void pkey_free_gost94(EVP_PKEY *key)
 258         {
 259         if (key->pkey.dsa)
 260                 {
 261                 DSA_free(key->pkey.dsa);
 262                 }
 263         }
 264
 265 static void pkey_free_gost01(EVP_PKEY *key)
 266         {
 267         if (key->pkey.ec)
 268                 {
 269                 EC_KEY_free(key->pkey.ec);
 270                 }
 271         }
 272
 273 /* ------------------ private key functions  -----------------------------*/
 274 static int priv_decode_gost( EVP_PKEY *pk, PKCS8_PRIV_KEY_INFO *p8inf)
 275         {
 276         const unsigned char *pkey_buf = NULL,*p=NULL;
 277         int priv_len = 0;
 278         BIGNUM *pk_num=NULL;
 279         int ret =0;
 280         X509_ALGOR *palg =NULL;
 281         ASN1_OBJECT *palg_obj = NULL;
 282         ASN1_INTEGER *priv_key=NULL;
 283
 284         if (!PKCS8_pkey_get0(&palg_obj,&pkey_buf,&priv_len,&palg,p8inf))
 285                 return 0;
 286         p = pkey_buf;
 287         if (!decode_gost_algor_params(pk,palg))
 288                 {
 289                 return 0;
 290                 }
 291         if (V_ASN1_OCTET_STRING == *p)
 292                 {
 293                 /* New format - Little endian octet string */
 294                 unsigned char rev_buf[32];
 295                 int i;
 296                 ASN1_OCTET_STRING *s = d2i_ASN1_OCTET_STRING(NULL,&p,priv_len);
 297                 if (!s||s->length !=32)
 298                         {
 299                         GOSTerr(GOST_F_PRIV_DECODE_GOST,
 300                                 EVP_R_DECODE_ERROR);
 301                         return 0;
 302                         }
 303                 for (i=0;i<32;i++)
 304                         {
 305                         rev_buf[31-i]=s->data[i];
 306                         }
 307                 ASN1_STRING_free(s);
 308                 pk_num = getbnfrombuf(rev_buf,32);
 309                 }
 310         else
 311                 {
 312                 priv_key=d2i_ASN1_INTEGER(NULL,&p,priv_len);
 313                 if (!priv_key) return 0;
 314                 ret= ((pk_num =  ASN1_INTEGER_to_BN(priv_key, NULL))!=NULL) ;
 315                 ASN1_INTEGER_free(priv_key);
 316                 if (!ret)
 317                         {
 318                         GOSTerr(GOST_F_PRIV_DECODE_GOST,
 319                                 EVP_R_DECODE_ERROR);
 320                         return 0;
 321                         }
 322                 }
 323
 324         ret= gost_set_priv_key(pk,pk_num);
 325         BN_free(pk_num);
 326         return ret;
 327         }
 328
 329 /* ----------------------------------------------------------------------*/
 330 static int priv_encode_gost(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pk)
 331         {
 332         ASN1_OBJECT *algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 333         ASN1_STRING *params = encode_gost_algor_params(pk);
 334         unsigned char *priv_buf = NULL;
 335         int priv_len;
 336
 337         ASN1_INTEGER *asn1key=NULL;
 338         if (!params)
 339                 {
 340                 return 0;
 341                 }
 342         asn1key = BN_to_ASN1_INTEGER(gost_get0_priv_key(pk),NULL);
 343         priv_len = i2d_ASN1_INTEGER(asn1key,&priv_buf);
 344         ASN1_INTEGER_free(asn1key);
 345         return PKCS8_pkey_set0(p8,algobj,0,V_ASN1_SEQUENCE,params,
 346                 priv_buf,priv_len);
 347         }
 348 /* --------- printing keys --------------------------------*/
 349 static int print_gost_94(BIO *out, const EVP_PKEY *pkey, int indent,
 350         ASN1_PCTX *pctx, int type)
 351         {
 352         int param_nid = NID_undef;
 353
 354         if (type == 2)
 355                 {
 356                 BIGNUM *key;
 357
 358                 if (!BIO_indent(out,indent,128)) return 0;
 359                 BIO_printf(out,"Private key: ");
 360                 key = gost_get0_priv_key(pkey);
 361                 if (!key)
 362                         BIO_printf(out,"<undefined>");
 363                 else
 364                         BN_print(out,key);
 365                 BIO_printf(out,"\n");
 366                 }
 367         if (type >= 1)
 368                 {
 369                 BIGNUM *pubkey;
 370
 371                 pubkey = ((DSA *)EVP_PKEY_get0((EVP_PKEY *)pkey))->pub_key;
 372                 BIO_indent(out,indent,128);
 373                 BIO_printf(out,"Public key: ");
 374                 BN_print(out,pubkey);
 375                 BIO_printf(out,"\n");
 376         }
 377
 378         param_nid = gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)pkey));
 379         BIO_indent(out,indent,128);
 380         BIO_printf(out, "Parameter set: %s\n",OBJ_nid2ln(param_nid));
 381         return 1;
 382 }
 383
 384 static int param_print_gost94(BIO *out, const EVP_PKEY *pkey, int indent,
 385         ASN1_PCTX *pctx)
 386         {
 387         return print_gost_94(out, pkey, indent, pctx,0);
 388         }
 389
 390 static int pub_print_gost94(BIO *out, const EVP_PKEY *pkey, int indent,
 391         ASN1_PCTX *pctx)
 392         {
 393         return print_gost_94(out,pkey, indent, pctx,1);
 394         }
 395 static int priv_print_gost94(BIO *out,const EVP_PKEY *pkey, int indent,
 396         ASN1_PCTX *pctx)
 397         {
 398         return print_gost_94(out,pkey,indent,pctx,2);
 399         }
 400
 401 static int print_gost_01(BIO *out, const EVP_PKEY *pkey, int indent,
 402         ASN1_PCTX *pctx, int type)
 403         {
 404         int param_nid = NID_undef;
 405         if (type == 2)
 406                 {
 407                 BIGNUM *key;
 408
 409                 if (!BIO_indent(out,indent,128)) return 0;
 410                 BIO_printf(out,"Private key: ");
 411                 key = gost_get0_priv_key(pkey);
 412                 if (!key)
 413                         BIO_printf(out,"<undefined)");
 414                 else
 415                         BN_print(out,key);
 416                 BIO_printf(out,"\n");
 417                 }
 418         if (type >=1)
 419                 {
 420                 BN_CTX *ctx = BN_CTX_new();
 421                 BIGNUM *X,*Y;
 422                 const EC_POINT *pubkey;
 423                 const EC_GROUP *group;
 424                 BN_CTX_start(ctx);
 425                 X= BN_CTX_get(ctx);
 426                 Y=BN_CTX_get(ctx);
 427                 if (!ctx)
 428                         {
 429                         GOSTerr(GOST_F_PRINT_GOST_01,ERR_R_MALLOC_FAILURE);
 430                         return 0;
 431                         }
 432                 pubkey = EC_KEY_get0_public_key((EC_KEY *)EVP_PKEY_get0((EVP_PKEY *)pkey));
 433                 group = EC_KEY_get0_group((EC_KEY *)EVP_PKEY_get0((EVP_PKEY *)pkey));
 434                 if (!EC_POINT_get_affine_coordinates_GFp(group,pubkey,X,Y,ctx))
 435                         {
 436                         GOSTerr(GOST_F_PRINT_GOST_01,ERR_R_EC_LIB);
 437                         BN_CTX_free(ctx);
 438                         return 0;
 439                         }
 440                 if (!BIO_indent(out,indent,128)) return 0;
 441                 BIO_printf(out,"Public key:\n");
 442                 if (!BIO_indent(out,indent+3,128)) return 0;
 443                 BIO_printf(out,"X:");
 444                 BN_print(out,X);
 445                 BIO_printf(out,"\n");
 446                 BIO_indent(out,indent+3,128);
 447                 BIO_printf(out,"Y:");
 448                 BN_print(out,Y);
 449                 BIO_printf(out,"\n");
 450                 BN_CTX_end(ctx);
 451                 BN_CTX_free(ctx);
 452                 }
 453
 454         param_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)pkey)));
 455         if (!BIO_indent(out,indent,128)) return 0;
 456         BIO_printf(out,"Parameter set: %s\n",OBJ_nid2ln(param_nid));
 457         return 1;
 458 }
 459 static int param_print_gost01(BIO *out, const EVP_PKEY *pkey, int indent,
 460         ASN1_PCTX *pctx)
 461         {
 462         return print_gost_01(out,pkey,indent,pctx,0);
 463         }
 464 static int pub_print_gost01(BIO *out, const EVP_PKEY *pkey, int indent,
 465         ASN1_PCTX *pctx)
 466         {
 467         return print_gost_01(out,pkey, indent, pctx,1);
 468         }
 469 static int priv_print_gost01(BIO *out,const EVP_PKEY *pkey, int indent,
 470         ASN1_PCTX *pctx)
 471         {
 472         return print_gost_01(out,pkey,indent,pctx,2);
 473         }
 474 /* ---------------------------------------------------------------------*/
 475 static int param_missing_gost94(const EVP_PKEY *pk)
 476         {
 477         const DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
 478         if (!dsa) return 1;
 479         if (!dsa->q) return 1;
 480         return 0;
 481         }
 482
 483 static int param_missing_gost01(const EVP_PKEY *pk)
 484         {
 485         const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
 486         if (!ec) return 1;
 487         if (!EC_KEY_get0_group(ec)) return 1;
 488         return 0;
 489         }
 490
 491 static int param_copy_gost94(EVP_PKEY *to, const EVP_PKEY *from)
 492         {
 493         const DSA *dfrom = EVP_PKEY_get0((EVP_PKEY *)from);
 494         DSA *dto = EVP_PKEY_get0(to);
 495         if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
 496                 {
 497                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 498                         GOST_R_INCOMPATIBLE_ALGORITHMS);
 499                 return 0;
 500                 }
 501         if (!dfrom)
 502                 {
 503                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 504                         GOST_R_KEY_PARAMETERS_MISSING);
 505                 return 0;
 506                 }
 507         if (!dto)
 508                 {
 509                 dto = DSA_new();
 510                 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),dto);
 511                 }
 512 #define COPYBIGNUM(a,b,x) if (a->x) BN_free(a->x); a->x=BN_dup(b->x);
 513         COPYBIGNUM(dto,dfrom,p)
 514                 COPYBIGNUM(dto,dfrom,q)
 515                 COPYBIGNUM(dto,dfrom,g)
 516
 517                 if (dto->priv_key)
 518                         gost94_compute_public(dto);
 519         return 1;
 520         }
 521 static int param_copy_gost01(EVP_PKEY *to, const EVP_PKEY *from)
 522         {
 523         EC_KEY *eto = EVP_PKEY_get0(to);
 524         const EC_KEY *efrom = EVP_PKEY_get0((EVP_PKEY *)from);
 525         if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
 526                 {
 527                 GOSTerr(GOST_F_PARAM_COPY_GOST01,
 528                         GOST_R_INCOMPATIBLE_ALGORITHMS);
 529                 return 0;
 530                 }
 531         if (!efrom)
 532                 {
 533                 GOSTerr(GOST_F_PARAM_COPY_GOST01,
 534                         GOST_R_KEY_PARAMETERS_MISSING);
 535                 return 0;
 536                 }
 537         if (!eto)
 538                 {
 539                 eto = EC_KEY_new();
 540                 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),eto);
 541                 }
 542         EC_KEY_set_group(eto,EC_KEY_get0_group(efrom));
 543         if (EC_KEY_get0_private_key(eto))
 544                 {
 545                 gost2001_compute_public(eto);
 546                 }
 547         return 1;
 548         }
 549
 550 static int param_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
 551         {
 552         const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
 553         const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
 554         if (!BN_cmp(da->q,db->q)) return 1;
 555         return 0;
 556         }
 557
 558 static int param_cmp_gost01(const EVP_PKEY *a, const EVP_PKEY *b)
 559         {
 560         if (EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)a)))==
 561                 EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)b))))
 562                 {
 563                 return 1;
 564                 }
 565         return 0;
 566
 567         }
 568
 569 /* ---------- Public key functions * --------------------------------------*/
 570 static int pub_decode_gost94(EVP_PKEY *pk, X509_PUBKEY *pub)
 571         {
 572         X509_ALGOR *palg = NULL;
 573         const unsigned char *pubkey_buf = NULL;
 574         unsigned char *databuf;
 575         ASN1_OBJECT *palgobj = NULL;
 576         int pub_len,i,j;
 577         DSA *dsa;
 578         ASN1_OCTET_STRING *octet= NULL;
 579
 580         if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
 581                         &palg, pub)) return 0;
 582         EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
 583         if (!decode_gost_algor_params(pk,palg)) return 0;
 584         octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
 585         if (!octet)
 586                 {
 587                 GOSTerr(GOST_F_PUB_DECODE_GOST94,ERR_R_MALLOC_FAILURE);
 588                 return 0;
 589                 }
 590         databuf = OPENSSL_malloc(octet->length);
 591         for (i=0,j=octet->length-1;i<octet->length;i++,j--)
 592                 {
 593                 databuf[j]=octet->data[i];
 594                 }
 595         dsa = EVP_PKEY_get0(pk);
 596         dsa->pub_key=BN_bin2bn(databuf,octet->length,NULL);
 597         ASN1_OCTET_STRING_free(octet);
 598         OPENSSL_free(databuf);
 599         return 1;
 600
 601         }
 602
 603 static int pub_encode_gost94(X509_PUBKEY *pub,const EVP_PKEY *pk)
 604         {
 605         ASN1_OBJECT *algobj = NULL;
 606         ASN1_OCTET_STRING *octet = NULL;
 607         void *pval = NULL;
 608         unsigned char *buf=NULL,*databuf,*sptr;
 609         int i,j,data_len,ret=0;
 610
 611         int ptype = V_ASN1_UNDEF;
 612         DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
 613         algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 614         if (pk->save_parameters)
 615                 {
 616                 ASN1_STRING *params = encode_gost_algor_params(pk);
 617                 pval = params;
 618                 ptype = V_ASN1_SEQUENCE;
 619                 }
 620         data_len = BN_num_bytes(dsa->pub_key);
 621         databuf = OPENSSL_malloc(data_len);
 622         BN_bn2bin(dsa->pub_key,databuf);
 623         octet = ASN1_OCTET_STRING_new();
 624         ASN1_STRING_set(octet,NULL,data_len);
 625         sptr = ASN1_STRING_data(octet);
 626         for (i=0,j=data_len-1; i< data_len;i++,j--)
 627                 {
 628                 sptr[i]=databuf[j];
 629                 }
 630         OPENSSL_free(databuf);
 631         ret = i2d_ASN1_OCTET_STRING(octet,&buf);
 632         ASN1_BIT_STRING_free(octet);
 633         if (ret <0)  return 0;
 634         return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
 635         }
 636
 637 static int pub_decode_gost01(EVP_PKEY *pk,X509_PUBKEY *pub)
 638         {
 639         X509_ALGOR *palg = NULL;
 640         const unsigned char *pubkey_buf = NULL;
 641         unsigned char *databuf;
 642         ASN1_OBJECT *palgobj = NULL;
 643         int pub_len,i,j;
 644         EC_POINT *pub_key;
 645         BIGNUM *X,*Y;
 646         ASN1_OCTET_STRING *octet= NULL;
 647         int len;
 648         const EC_GROUP *group;
 649
 650         if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
 651                         &palg, pub)) return 0;
 652         EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
 653         if (!decode_gost_algor_params(pk,palg)) return 0;
 654         group = EC_KEY_get0_group(EVP_PKEY_get0(pk));
 655         octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
 656         if (!octet)
 657                 {
 658                 GOSTerr(GOST_F_PUB_DECODE_GOST01,ERR_R_MALLOC_FAILURE);
 659                 return 0;
 660                 }
 661         databuf = OPENSSL_malloc(octet->length);
 662         for (i=0,j=octet->length-1;i<octet->length;i++,j--)
 663                 {
 664                 databuf[j]=octet->data[i];
 665                 }
 666         len=octet->length/2;
 667         ASN1_OCTET_STRING_free(octet);
 668
 669         Y= getbnfrombuf(databuf,len);
 670         X= getbnfrombuf(databuf+len,len);
 671         OPENSSL_free(databuf);
 672         pub_key = EC_POINT_new(group);
 673         if (!EC_POINT_set_affine_coordinates_GFp(group
 674                         ,pub_key,X,Y,NULL))
 675                 {
 676                 GOSTerr(GOST_F_PUB_DECODE_GOST01,
 677                         ERR_R_EC_LIB);
 678                 EC_POINT_free(pub_key);
 679                 BN_free(X);
 680                 BN_free(Y);
 681                 return 0;
 682                 }
 683         BN_free(X);
 684         BN_free(Y);
 685         if (!EC_KEY_set_public_key(EVP_PKEY_get0(pk),pub_key))
 686                 {
 687                 GOSTerr(GOST_F_PUB_DECODE_GOST01,
 688                         ERR_R_EC_LIB);
 689                 EC_POINT_free(pub_key);
 690                 return 0;
 691                 }
 692         EC_POINT_free(pub_key);
 693         return 1;
 694
 695         }
 696
 697 static int pub_encode_gost01(X509_PUBKEY *pub,const EVP_PKEY *pk)
 698         {
 699         ASN1_OBJECT *algobj = NULL;
 700         ASN1_OCTET_STRING *octet = NULL;
 701         void *pval = NULL;
 702         unsigned char *buf=NULL,*databuf,*sptr;
 703         int i,j,data_len,ret=0;
 704         const EC_POINT *pub_key;
 705         BIGNUM *X,*Y,*order;
 706         const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
 707         int ptype = V_ASN1_UNDEF;
 708
 709         algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 710         if (pk->save_parameters)
 711                 {
 712                 ASN1_STRING *params = encode_gost_algor_params(pk);
 713                 pval = params;
 714                 ptype = V_ASN1_SEQUENCE;
 715                 }
 716         order = BN_new();
 717         EC_GROUP_get_order(EC_KEY_get0_group(ec),order,NULL);
 718         pub_key=EC_KEY_get0_public_key(ec);
 719         if (!pub_key)
 720                 {
 721                 GOSTerr(GOST_F_PUB_ENCODE_GOST01,
 722                         GOST_R_PUBLIC_KEY_UNDEFINED);
 723                 return 0;
 724                 }
 725         X=BN_new();
 726         Y=BN_new();
 727         EC_POINT_get_affine_coordinates_GFp(EC_KEY_get0_group(ec),
 728                 pub_key,X,Y,NULL);
 729         data_len = 2*BN_num_bytes(order);
 730         BN_free(order);
 731         databuf = OPENSSL_malloc(data_len);
 732         memset(databuf,0,data_len);
 733
 734         store_bignum(X,databuf+data_len/2,data_len/2);
 735         store_bignum(Y,databuf,data_len/2);
 736
 737         BN_free(X);
 738         BN_free(Y);
 739         octet = ASN1_OCTET_STRING_new();
 740         ASN1_STRING_set(octet,NULL,data_len);
 741         sptr=ASN1_STRING_data(octet);
 742     for (i=0,j=data_len-1;i<data_len;i++,j--)
 743                 {
 744         sptr[i]=databuf[j];
 745                 }
 746     OPENSSL_free(databuf);
 747         ret = i2d_ASN1_OCTET_STRING(octet,&buf);
 748         ASN1_BIT_STRING_free(octet);
 749         if (ret <0)  return 0;
 750         return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
 751         }
 752
 753 static int pub_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
 754         {
 755         const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
 756         const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
 757         if (da && db && da->pub_key && db->pub_key
 758                 && !BN_cmp(da->pub_key,db->pub_key))
 759                 {
 760                 return 1;
 761                 }
 762         return 0;
 763         }
 764
 765 static int pub_cmp_gost01(const EVP_PKEY *a,const EVP_PKEY *b)
 766         {
 767         const EC_KEY *ea = EVP_PKEY_get0((EVP_PKEY *)a);
 768         const EC_KEY *eb = EVP_PKEY_get0((EVP_PKEY *)b);
 769         const EC_POINT *ka,*kb;
 770         int ret=0;
 771         if (!ea || !eb) return 0;
 772         ka = EC_KEY_get0_public_key(ea);
 773         kb = EC_KEY_get0_public_key(eb);
 774         if (!ka || !kb) return 0;
 775         ret = (0==EC_POINT_cmp(EC_KEY_get0_group(ea),ka,kb,NULL)) ;
 776         return ret;
 777         }
 778
 779
 780
 781
 782 static int pkey_size_gost(const EVP_PKEY *pk)
 783         {
 784         return 64;
 785         }
 786
 787 static int pkey_bits_gost(const EVP_PKEY *pk)
 788         {
 789         return 256;
 790         }
 791 /*------------------------ ASN1 METHOD for GOST MAC  -------------------*/
 792 static void  mackey_free_gost(EVP_PKEY *pk)
 793         {
 794                 if (pk->pkey.ptr) {
 795                         OPENSSL_free(pk->pkey.ptr);
 796                 }
 797         }
 798 static int mac_ctrl_gost(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 799 {
 800         switch (op)
 801                 {
 802                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 803                         *(int *)arg2 = NID_undef;
 804                         return 2;
 805                 }
 806         return -2;
 807 }
 808 /* ----------------------------------------------------------------------*/
 809 int register_ameth_gost (int nid, EVP_PKEY_ASN1_METHOD **ameth, const char* pemstr, const char* info)
 810         {
 811         *ameth =        EVP_PKEY_asn1_new(nid,
 812                 ASN1_PKEY_SIGPARAM_NULL, pemstr, info);
 813         if (!*ameth) return 0;
 814         switch (nid)
 815                 {
 816                 case NID_id_GostR3410_94:
 817                         EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost94);
 818                         EVP_PKEY_asn1_set_private (*ameth,
 819                                 priv_decode_gost, priv_encode_gost,
 820                                 priv_print_gost94);
 821
 822                         EVP_PKEY_asn1_set_param (*ameth, 0, 0,
 823                                 param_missing_gost94, param_copy_gost94,
 824                                 param_cmp_gost94,param_print_gost94 );
 825                         EVP_PKEY_asn1_set_public (*ameth,
 826                                 pub_decode_gost94, pub_encode_gost94,
 827                                 pub_cmp_gost94, pub_print_gost94,
 828                                 pkey_size_gost, pkey_bits_gost);
 829
 830                         EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
 831                         break;
 832                 case NID_id_GostR3410_2001:
 833                         EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost01);
 834                         EVP_PKEY_asn1_set_private (*ameth,
 835                                 priv_decode_gost, priv_encode_gost,
 836                                 priv_print_gost01);
 837
 838                         EVP_PKEY_asn1_set_param (*ameth, 0, 0,
 839                                 param_missing_gost01, param_copy_gost01,
 840                                 param_cmp_gost01, param_print_gost01);
 841                         EVP_PKEY_asn1_set_public (*ameth,
 842                                 pub_decode_gost01, pub_encode_gost01,
 843                                 pub_cmp_gost01, pub_print_gost01,
 844                                 pkey_size_gost, pkey_bits_gost);
 845
 846                         EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
 847                         break;
 848                 case NID_id_Gost28147_89_MAC:
 849                         EVP_PKEY_asn1_set_free(*ameth, mackey_free_gost);
 850                         EVP_PKEY_asn1_set_ctrl(*ameth,mac_ctrl_gost);
 851                         break;
 852                 }
 853         return 1;
 854         }