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
 347 static int priv_print_gost (BIO *out,const EVP_PKEY *pkey, int indent,
 348         ASN1_PCTX *pctx)
 349         {
 350         BIGNUM *key;
 351         if (!BIO_indent(out,indent,128)) return 0;
 352         key = gost_get0_priv_key(pkey);
 353         if (!key) return 0;
 354         BN_print(out,key);
 355         return 1;
 356         }
 357
 358 /* ---------------------------------------------------------------------*/
 359 static int param_missing_gost94(const EVP_PKEY *pk)
 360         {
 361         const DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
 362         if (!dsa) return 1;
 363         if (!dsa->q) return 1;
 364         return 0;
 365         }
 366
 367 static int param_missing_gost01(const EVP_PKEY *pk)
 368         {
 369         const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
 370         if (!ec) return 1;
 371         if (!EC_KEY_get0_group(ec)) return 1;
 372         return 0;
 373         }
 374
 375 static int param_copy_gost94(EVP_PKEY *to, const EVP_PKEY *from)
 376         {
 377         const DSA *dfrom = EVP_PKEY_get0((EVP_PKEY *)from);
 378         DSA *dto = EVP_PKEY_get0(to);
 379         if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
 380                 {
 381                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 382                         GOST_R_INCOMPATIBLE_ALGORITHMS);
 383                 return 0;
 384                 }
 385         if (!dfrom)
 386                 {
 387                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 388                         GOST_R_KEY_PARAMETERS_MISSING);
 389                 return 0;
 390                 }
 391         if (!dto)
 392                 {
 393                 dto = DSA_new();
 394                 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),dto);
 395                 }
 396 #define COPYBIGNUM(a,b,x) if (a->x) BN_free(a->x); a->x=BN_dup(b->x);
 397         COPYBIGNUM(dto,dfrom,p)
 398                 COPYBIGNUM(dto,dfrom,q)
 399                 COPYBIGNUM(dto,dfrom,g)
 400
 401                 if (dto->priv_key)
 402                         gost94_compute_public(dto);
 403         return 1;
 404         }
 405 static int param_copy_gost01(EVP_PKEY *to, const EVP_PKEY *from)
 406         {
 407         EC_KEY *eto = EVP_PKEY_get0(to);
 408         const EC_KEY *efrom = EVP_PKEY_get0((EVP_PKEY *)from);
 409         if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
 410                 {
 411                 GOSTerr(GOST_F_PARAM_COPY_GOST01,
 412                         GOST_R_INCOMPATIBLE_ALGORITHMS);
 413                 return 0;
 414                 }
 415         if (!efrom)
 416                 {
 417                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 418                         GOST_R_KEY_PARAMETERS_MISSING);
 419                 return 0;
 420                 }
 421         if (!eto)
 422                 {
 423                 eto = EC_KEY_new();
 424                 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),eto);
 425                 }
 426         EC_KEY_set_group(eto,EC_KEY_get0_group(efrom));
 427         if (EC_KEY_get0_private_key(eto))
 428                 {
 429                 gost2001_compute_public(eto);
 430                 }
 431         return 1;
 432         }
 433
 434 static int param_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
 435         {
 436         const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
 437         const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
 438         if (!BN_cmp(da->q,db->q)) return 1;
 439         return 0;
 440         }
 441
 442 static int param_cmp_gost01(const EVP_PKEY *a, const EVP_PKEY *b)
 443         {
 444         if (EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)a)))==
 445                 EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)b))))
 446                 {
 447                 return 1;
 448                 }
 449         return 0;
 450
 451         }
 452
 453 /* ---------- Public key functions * --------------------------------------*/
 454 static int pub_decode_gost94(EVP_PKEY *pk, X509_PUBKEY *pub)
 455         {
 456         X509_ALGOR *palg = NULL;
 457         const unsigned char *pubkey_buf = NULL;
 458         unsigned char *databuf;
 459         ASN1_OBJECT *palgobj = NULL;
 460         int pub_len,i,j;
 461         DSA *dsa;
 462         ASN1_OCTET_STRING *octet= NULL;
 463
 464         if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
 465                         &palg, pub)) return 0;
 466         EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
 467         if (!decode_gost_algor_params(pk,palg)) return 0;
 468         octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
 469         if (!octet)
 470                 {
 471                 GOSTerr(GOST_F_PUB_DECODE_GOST94,ERR_R_MALLOC_FAILURE);
 472                 return 0;
 473                 }
 474         databuf = OPENSSL_malloc(octet->length);
 475         for (i=0,j=octet->length-1;i<octet->length;i++,j--)
 476                 {
 477                 databuf[j]=octet->data[i];
 478                 }
 479         dsa = EVP_PKEY_get0(pk);
 480         dsa->pub_key=BN_bin2bn(databuf,octet->length,NULL);
 481         ASN1_OCTET_STRING_free(octet);
 482         OPENSSL_free(databuf);
 483         return 1;
 484
 485         }
 486
 487 static int pub_encode_gost94(X509_PUBKEY *pub,const EVP_PKEY *pk)
 488         {
 489         ASN1_OBJECT *algobj = NULL;
 490         ASN1_OCTET_STRING *octet = NULL;
 491         void *pval = NULL;
 492         unsigned char *buf=NULL,*databuf,*sptr;
 493         int i,j,data_len,ret=0;
 494
 495         int ptype = V_ASN1_UNDEF;
 496         DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
 497         algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 498         if (pk->save_parameters)
 499                 {
 500                 ASN1_STRING *params = encode_gost_algor_params(pk);
 501                 pval = params;
 502                 ptype = V_ASN1_SEQUENCE;
 503                 }
 504         data_len = BN_num_bytes(dsa->pub_key);
 505         databuf = OPENSSL_malloc(data_len);
 506         BN_bn2bin(dsa->pub_key,databuf);
 507         octet = ASN1_OCTET_STRING_new();
 508         ASN1_STRING_set(octet,NULL,data_len);
 509         sptr = ASN1_STRING_data(octet);
 510         for (i=0,j=data_len-1; i< data_len;i++,j--)
 511                 {
 512                 sptr[i]=databuf[j];
 513                 }
 514         OPENSSL_free(databuf);
 515         ret = i2d_ASN1_OCTET_STRING(octet,&buf);
 516         ASN1_BIT_STRING_free(octet);
 517         if (ret <0)  return 0;
 518         return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
 519         }
 520
 521 static int pub_decode_gost01(EVP_PKEY *pk,X509_PUBKEY *pub)
 522         {
 523         X509_ALGOR *palg = NULL;
 524         const unsigned char *pubkey_buf = NULL;
 525         unsigned char *databuf;
 526         ASN1_OBJECT *palgobj = NULL;
 527         int pub_len,i,j;
 528         EC_POINT *pub_key;
 529         BIGNUM *X,*Y;
 530         ASN1_OCTET_STRING *octet= NULL;
 531         int len;
 532         const EC_GROUP *group;
 533
 534         if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
 535                         &palg, pub)) return 0;
 536         EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
 537         if (!decode_gost_algor_params(pk,palg)) return 0;
 538         group = EC_KEY_get0_group(EVP_PKEY_get0(pk));
 539         octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
 540         if (!octet)
 541                 {
 542                 GOSTerr(GOST_F_PUB_DECODE_GOST94,ERR_R_MALLOC_FAILURE);
 543                 return 0;
 544                 }
 545         databuf = OPENSSL_malloc(octet->length);
 546         for (i=0,j=octet->length-1;i<octet->length;i++,j--)
 547                 {
 548                 databuf[j]=octet->data[i];
 549                 }
 550         len=octet->length/2;
 551         ASN1_OCTET_STRING_free(octet);
 552
 553         Y= getbnfrombuf(databuf,len);
 554         X= getbnfrombuf(databuf+len,len);
 555         OPENSSL_free(databuf);
 556         pub_key = EC_POINT_new(group);
 557         if (!EC_POINT_set_affine_coordinates_GFp(group
 558                         ,pub_key,X,Y,NULL))
 559                 {
 560                 GOSTerr(GOST_F_PUB_DECODE_GOST01,
 561                         ERR_R_EC_LIB);
 562                 EC_POINT_free(pub_key);
 563                 BN_free(X);
 564                 BN_free(Y);
 565                 return 0;
 566                 }
 567         BN_free(X);
 568         BN_free(Y);
 569         if (!EC_KEY_set_public_key(EVP_PKEY_get0(pk),pub_key))
 570                 {
 571                 GOSTerr(GOST_F_PUB_DECODE_GOST01,
 572                         ERR_R_EC_LIB);
 573                 EC_POINT_free(pub_key);
 574                 return 0;
 575                 }
 576         EC_POINT_free(pub_key);
 577         return 1;
 578
 579         }
 580
 581 static int pub_encode_gost01(X509_PUBKEY *pub,const EVP_PKEY *pk)
 582         {
 583         ASN1_OBJECT *algobj = NULL;
 584         ASN1_OCTET_STRING *octet = NULL;
 585         void *pval = NULL;
 586         unsigned char *buf=NULL,*databuf,*sptr;
 587         int i,j,data_len,ret=0;
 588         const EC_POINT *pub_key;
 589         BIGNUM *X,*Y,*order;
 590         const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
 591         int ptype = V_ASN1_UNDEF;
 592
 593         algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 594         if (pk->save_parameters)
 595                 {
 596                 ASN1_STRING *params = encode_gost_algor_params(pk);
 597                 pval = params;
 598                 ptype = V_ASN1_SEQUENCE;
 599                 }
 600         order = BN_new();
 601         EC_GROUP_get_order(EC_KEY_get0_group(ec),order,NULL);
 602         pub_key=EC_KEY_get0_public_key(ec);
 603         if (!pub_key)
 604                 {
 605                 GOSTerr(GOST_F_PUB_ENCODE_GOST01,
 606                         GOST_R_PUBLIC_KEY_UNDEFINED);
 607                 return 0;
 608                 }
 609         X=BN_new();
 610         Y=BN_new();
 611         EC_POINT_get_affine_coordinates_GFp(EC_KEY_get0_group(ec),
 612                 pub_key,X,Y,NULL);
 613         data_len = 2*BN_num_bytes(order);
 614         BN_free(order);
 615         databuf = OPENSSL_malloc(data_len);
 616         memset(databuf,0,data_len);
 617
 618         store_bignum(X,databuf+data_len/2,data_len/2);
 619         store_bignum(Y,databuf,data_len/2);
 620
 621         BN_free(X);
 622         BN_free(Y);
 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_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
 638         {
 639         const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
 640         const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
 641         if (da && db && da->pub_key && db->pub_key
 642                 && !BN_cmp(da->pub_key,db->pub_key))
 643                 {
 644                 return 1;
 645                 }
 646         return 0;
 647         }
 648
 649 static int pub_cmp_gost01(const EVP_PKEY *a,const EVP_PKEY *b)
 650         {
 651         const EC_KEY *ea = EVP_PKEY_get0((EVP_PKEY *)a);
 652         const EC_KEY *eb = EVP_PKEY_get0((EVP_PKEY *)b);
 653         const EC_POINT *ka,*kb;
 654         int ret=0;
 655         if (!ea || !eb) return 0;
 656         ka = EC_KEY_get0_public_key(ea);
 657         kb = EC_KEY_get0_public_key(eb);
 658         if (!ka || !kb) return 0;
 659         ret = (0==EC_POINT_cmp(EC_KEY_get0_group(ea),ka,kb,NULL)) ;
 660         return ret;
 661         }
 662
 663 static int pub_print_gost94(BIO *out, const EVP_PKEY *pkey, int indent,
 664         ASN1_PCTX *pctx)
 665         {
 666         const BIGNUM *key;
 667         if (!BIO_indent(out,indent,128)) return 0;
 668         key = ((DSA *)EVP_PKEY_get0((EVP_PKEY *)pkey))->pub_key;
 669         if (!key) return 0;
 670         BN_print(out,key);
 671         return 1;
 672         }
 673
 674 static int pub_print_gost01(BIO *out, const EVP_PKEY *pkey, int indent,
 675         ASN1_PCTX *pctx)
 676         {
 677         return 0;
 678         }
 679
 680 static int pkey_size_gost(const EVP_PKEY *pk)
 681         {
 682         return 64;
 683         }
 684
 685 static int pkey_bits_gost(const EVP_PKEY *pk)
 686         {
 687         return 256;
 688         }
 689 /*------------------------ ASN1 METHOD for GOST MAC  -------------------*/
 690 static void  mackey_free_gost(EVP_PKEY *pk)
 691         {
 692                 if (pk->pkey.ptr) {
 693                         OPENSSL_free(pk->pkey.ptr);
 694                 }
 695         }
 696 static int mac_ctrl_gost(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 697 {
 698         switch (op)
 699                 {
 700                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 701                         *(int *)arg2 = NID_undef;
 702                         return 2;
 703                 }
 704         return -2;
 705 }
 706 /* ----------------------------------------------------------------------*/
 707 int register_ameth_gost (int nid, EVP_PKEY_ASN1_METHOD **ameth, const char* pemstr, const char* info)
 708         {
 709         *ameth =        EVP_PKEY_asn1_new(nid,
 710                 ASN1_PKEY_SIGPARAM_NULL, pemstr, info);
 711         if (!*ameth) return 0;
 712         switch (nid)
 713                 {
 714                 case NID_id_GostR3410_94:
 715                         EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost94);
 716                         EVP_PKEY_asn1_set_private (*ameth,
 717                                 priv_decode_gost, priv_encode_gost,
 718                                 priv_print_gost);
 719
 720                         EVP_PKEY_asn1_set_param (*ameth, 0, 0,
 721                                 param_missing_gost94, param_copy_gost94,
 722                                 param_cmp_gost94,0 );
 723                         EVP_PKEY_asn1_set_public (*ameth,
 724                                 pub_decode_gost94, pub_encode_gost94,
 725                                 pub_cmp_gost94, pub_print_gost94,
 726                                 pkey_size_gost, pkey_bits_gost);
 727
 728                         EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
 729                         break;
 730                 case NID_id_GostR3410_2001:
 731                         EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost01);
 732                         EVP_PKEY_asn1_set_private (*ameth,
 733                                 priv_decode_gost, priv_encode_gost,
 734                                 priv_print_gost);
 735
 736                         EVP_PKEY_asn1_set_param (*ameth, 0, 0,
 737                                 param_missing_gost01, param_copy_gost01,
 738                                 param_cmp_gost01, 0);
 739                         EVP_PKEY_asn1_set_public (*ameth,
 740                                 pub_decode_gost01, pub_encode_gost01,
 741                                 pub_cmp_gost01, pub_print_gost01,
 742                                 pkey_size_gost, pkey_bits_gost);
 743
 744                         EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
 745                         break;
 746                 case NID_id_Gost28147_89_MAC:
 747                         EVP_PKEY_asn1_set_free(*ameth, mackey_free_gost);
 748                         EVP_PKEY_asn1_set_ctrl(*ameth,mac_ctrl_gost);
 749                         break;
 750                 }
 751         return 1;
 752         }