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