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 #ifndef OPENSSL_NO_CMS
  17 #include <openssl/cms.h>
  18 #endif
  19 #include "gost_params.h"
  20 #include "gost_lcl.h"
  21 #include "e_gost_err.h"
  22
  23 int gost94_nid_by_params(DSA *p)
  24         {
  25         R3410_params *gost_params;
  26         BIGNUM *q=BN_new();
  27         for (gost_params = R3410_paramset;gost_params->q!=NULL; gost_params++)
  28                 {
  29                 BN_dec2bn(&q,gost_params->q);
  30                 if (!BN_cmp(q,p->q))
  31                         {
  32                         BN_free(q);
  33                         return gost_params->nid;
  34                         }
  35                 }
  36         BN_free(q);
  37         return NID_undef;
  38         }
  39
  40 static ASN1_STRING  *encode_gost_algor_params(const EVP_PKEY *key)
  41         {
  42         ASN1_STRING *params = ASN1_STRING_new();
  43         GOST_KEY_PARAMS *gkp = GOST_KEY_PARAMS_new();
  44         int pkey_param_nid = NID_undef;
  45
  46         if (!params || !gkp)
  47                 {
  48                 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
  49                         ERR_R_MALLOC_FAILURE);
  50                 ASN1_STRING_free(params);
  51                 params = NULL;
  52                 goto err;
  53                 }
  54         switch (EVP_PKEY_base_id(key))
  55                 {
  56                 case NID_id_GostR3410_2001:
  57                         pkey_param_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)key)));
  58                         break;
  59                 case NID_id_GostR3410_94:
  60                         pkey_param_nid = (int) gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)key));
  61                         if (pkey_param_nid == NID_undef)
  62                                 {
  63                                 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
  64                                         GOST_R_INVALID_GOST94_PARMSET);
  65                                 ASN1_STRING_free(params);
  66                                 params=NULL;
  67                                 goto err;
  68                                 }
  69                         break;
  70                 }
  71         gkp->key_params = OBJ_nid2obj(pkey_param_nid);
  72         gkp->hash_params = OBJ_nid2obj(NID_id_GostR3411_94_CryptoProParamSet);
  73         /*gkp->cipher_params = OBJ_nid2obj(cipher_param_nid);*/
  74         params->length = i2d_GOST_KEY_PARAMS(gkp, &params->data);
  75         if (params->length <=0 )
  76                 {
  77                 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
  78                         ERR_R_MALLOC_FAILURE);
  79                 ASN1_STRING_free(params);
  80                 params = NULL;
  81                 goto err;
  82                 }
  83         params ->type = V_ASN1_SEQUENCE;
  84         err:
  85         GOST_KEY_PARAMS_free(gkp);
  86         return params;
  87         }
  88
  89 /* Parses GOST algorithm parameters from X509_ALGOR and
  90  * modifies pkey setting NID and parameters
  91  */
  92 static int decode_gost_algor_params(EVP_PKEY *pkey, X509_ALGOR *palg)
  93         {
  94         ASN1_OBJECT *palg_obj =NULL;
  95         int ptype = V_ASN1_UNDEF;
  96         int pkey_nid = NID_undef,param_nid = NID_undef;
  97         void *_pval;
  98         ASN1_STRING *pval = NULL;
  99         const unsigned char  *p;
 100         GOST_KEY_PARAMS *gkp = NULL;
 101
 102         X509_ALGOR_get0(&palg_obj, &ptype, &_pval, palg);
 103         pval = _pval;
 104         if (ptype != V_ASN1_SEQUENCE)
 105                 {
 106                 GOSTerr(GOST_F_DECODE_GOST_ALGOR_PARAMS,
 107                         GOST_R_BAD_KEY_PARAMETERS_FORMAT);
 108                 return 0;
 109                 }
 110         p=pval->data;
 111         pkey_nid = OBJ_obj2nid(palg_obj);
 112
 113         gkp = d2i_GOST_KEY_PARAMS(NULL,&p,pval->length);
 114         if (!gkp)
 115                 {
 116                 GOSTerr(GOST_F_DECODE_GOST_ALGOR_PARAMS,
 117                         GOST_R_BAD_PKEY_PARAMETERS_FORMAT);
 118                 return 0;
 119                 }
 120         param_nid = OBJ_obj2nid(gkp->key_params);
 121         GOST_KEY_PARAMS_free(gkp);
 122         EVP_PKEY_set_type(pkey,pkey_nid);
 123         switch (pkey_nid)
 124                 {
 125                 case NID_id_GostR3410_94:
 126                 {
 127                 DSA *dsa= EVP_PKEY_get0(pkey);
 128                 if (!dsa)
 129                         {
 130                         dsa = DSA_new();
 131                         if (!EVP_PKEY_assign(pkey,pkey_nid,dsa)) return 0;
 132                         }
 133                 if (!fill_GOST94_params(dsa,param_nid)) return 0;
 134                 break;
 135                 }
 136                 case NID_id_GostR3410_2001:
 137                 {
 138                 EC_KEY *ec = EVP_PKEY_get0(pkey);
 139                 if (!ec)
 140                         {
 141                         ec = EC_KEY_new();
 142                         if (!EVP_PKEY_assign(pkey,pkey_nid,ec)) return 0;
 143                         }
 144                 if (!fill_GOST2001_params(ec,param_nid)) return 0;
 145                 }
 146                 }
 147
 148         return 1;
 149         }
 150
 151 static int gost_set_priv_key(EVP_PKEY *pkey,BIGNUM *priv)
 152         {
 153         switch (EVP_PKEY_base_id(pkey))
 154                 {
 155                 case NID_id_GostR3410_94:
 156                 {
 157                 DSA *dsa = EVP_PKEY_get0(pkey);
 158                 if (!dsa)
 159                         {
 160                         dsa = DSA_new();
 161                         EVP_PKEY_assign(pkey,EVP_PKEY_base_id(pkey),dsa);
 162                         }
 163                 dsa->priv_key = BN_dup(priv);
 164                 if (!EVP_PKEY_missing_parameters(pkey))
 165                         gost94_compute_public(dsa);
 166                 break;
 167                 }
 168                 case NID_id_GostR3410_2001:
 169                 {
 170                 EC_KEY *ec = EVP_PKEY_get0(pkey);
 171                 if (!ec)
 172                         {
 173                         ec = EC_KEY_new();
 174                         EVP_PKEY_assign(pkey,EVP_PKEY_base_id(pkey),ec);
 175                         }
 176                 if (!EC_KEY_set_private_key(ec,priv)) return 0;
 177                 if (!EVP_PKEY_missing_parameters(pkey))
 178                         gost2001_compute_public(ec);
 179                 break;
 180                 }
 181                 }
 182         return 1;
 183         }
 184 BIGNUM* gost_get0_priv_key(const EVP_PKEY *pkey)
 185         {
 186         switch (EVP_PKEY_base_id(pkey))
 187                 {
 188                 case NID_id_GostR3410_94:
 189                 {
 190                 DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pkey);
 191                 if (!dsa)
 192                         {
 193                         return NULL;
 194                         }
 195                 if (!dsa->priv_key) return NULL;
 196                 return dsa->priv_key;
 197                 break;
 198                 }
 199                 case NID_id_GostR3410_2001:
 200                 {
 201                 EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pkey);
 202                 const BIGNUM* priv;
 203                 if (!ec)
 204                         {
 205                         return NULL;
 206                         }
 207                 if (!(priv=EC_KEY_get0_private_key(ec))) return NULL;
 208                 return (BIGNUM *)priv;
 209                 break;
 210                 }
 211                 }
 212         return NULL;
 213         }
 214
 215 static int pkey_ctrl_gost(EVP_PKEY *pkey, int op,
 216         long arg1, void *arg2)
 217         {
 218         switch (op)
 219                 {
 220                 case ASN1_PKEY_CTRL_PKCS7_SIGN:
 221                         if (arg1 == 0)
 222                                 {
 223                                 X509_ALGOR *alg1 = NULL, *alg2 = NULL;
 224                                 int nid = EVP_PKEY_base_id(pkey);
 225                                 PKCS7_SIGNER_INFO_get0_algs((PKCS7_SIGNER_INFO*)arg2,
 226                                         NULL, &alg1, &alg2);
 227                                 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_id_GostR3411_94),
 228                                         V_ASN1_NULL, 0);
 229                                 if (nid == NID_undef)
 230                                         {
 231                                         return (-1);
 232                                         }
 233                                 X509_ALGOR_set0(alg2, OBJ_nid2obj(nid), V_ASN1_NULL, 0);
 234                                 }
 235                         return 1;
 236 #ifndef OPENSSL_NO_CMS
 237                 case ASN1_PKEY_CTRL_CMS_SIGN:
 238                         if (arg1 == 0)
 239                                 {
 240                                 X509_ALGOR *alg1 = NULL, *alg2 = NULL;
 241                                 int nid = EVP_PKEY_base_id(pkey);
 242                                 CMS_SignerInfo_get0_algs((CMS_SignerInfo *)arg2,
 243                                         NULL, NULL, &alg1, &alg2);
 244                                 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_id_GostR3411_94),
 245                                         V_ASN1_NULL, 0);
 246                                 if (nid == NID_undef)
 247                                         {
 248                                         return (-1);
 249                                         }
 250                                 X509_ALGOR_set0(alg2, OBJ_nid2obj(nid), V_ASN1_NULL, 0);
 251                                 }
 252                         return 1;
 253 #endif
 254                 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
 255                         if (arg1 == 0)
 256                                 {
 257                                 X509_ALGOR *alg;
 258                                 ASN1_STRING * params = encode_gost_algor_params(pkey);
 259                                 if (!params)
 260                                         {
 261                                         return -1;
 262                                         }
 263                                 PKCS7_RECIP_INFO_get0_alg((PKCS7_RECIP_INFO*)arg2, &alg);
 264                                 X509_ALGOR_set0(alg, OBJ_nid2obj(pkey->type),
 265                                         V_ASN1_SEQUENCE, params);
 266                                 }
 267                         return 1;
 268 #ifndef OPENSSL_NO_CMS
 269                 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
 270                         if (arg1 == 0)
 271                                 {
 272                                 X509_ALGOR *alg;
 273                                 ASN1_STRING * params = encode_gost_algor_params(pkey);
 274                                 if (!params)
 275                                         {
 276                                         return -1;
 277                                         }
 278                                 CMS_RecipientInfo_ktri_get0_algs((CMS_RecipientInfo *)arg2, NULL, NULL, &alg);
 279                                 X509_ALGOR_set0(alg, OBJ_nid2obj(pkey->type),
 280                                         V_ASN1_SEQUENCE, params);
 281                                 }
 282                         return 1;
 283 #endif
 284                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 285                         *(int *)arg2 = NID_id_GostR3411_94;
 286                         return 2;
 287                 }
 288
 289         return -2;
 290         }
 291 /*----------------------- free functions * ------------------------------*/
 292 static void pkey_free_gost94(EVP_PKEY *key)
 293         {
 294         if (key->pkey.dsa)
 295                 {
 296                 DSA_free(key->pkey.dsa);
 297                 }
 298         }
 299
 300 static void pkey_free_gost01(EVP_PKEY *key)
 301         {
 302         if (key->pkey.ec)
 303                 {
 304                 EC_KEY_free(key->pkey.ec);
 305                 }
 306         }
 307
 308 /* ------------------ private key functions  -----------------------------*/
 309 static int priv_decode_gost( EVP_PKEY *pk, PKCS8_PRIV_KEY_INFO *p8inf)
 310         {
 311         const unsigned char *pkey_buf = NULL,*p=NULL;
 312         int priv_len = 0;
 313         BIGNUM *pk_num=NULL;
 314         int ret =0;
 315         X509_ALGOR *palg =NULL;
 316         ASN1_OBJECT *palg_obj = NULL;
 317         ASN1_INTEGER *priv_key=NULL;
 318
 319         if (!PKCS8_pkey_get0(&palg_obj,&pkey_buf,&priv_len,&palg,p8inf))
 320                 return 0;
 321         p = pkey_buf;
 322         if (!decode_gost_algor_params(pk,palg))
 323                 {
 324                 return 0;
 325                 }
 326         if (V_ASN1_OCTET_STRING == *p)
 327                 {
 328                 /* New format - Little endian octet string */
 329                 unsigned char rev_buf[32];
 330                 int i;
 331                 ASN1_OCTET_STRING *s = d2i_ASN1_OCTET_STRING(NULL,&p,priv_len);
 332                 if (!s||s->length !=32)
 333                         {
 334                         GOSTerr(GOST_F_PRIV_DECODE_GOST,
 335                                 EVP_R_DECODE_ERROR);
 336                         return 0;
 337                         }
 338                 for (i=0;i<32;i++)
 339                         {
 340                         rev_buf[31-i]=s->data[i];
 341                         }
 342                 ASN1_STRING_free(s);
 343                 pk_num = getbnfrombuf(rev_buf,32);
 344                 }
 345         else
 346                 {
 347                 priv_key=d2i_ASN1_INTEGER(NULL,&p,priv_len);
 348                 if (!priv_key) return 0;
 349                 ret= ((pk_num =  ASN1_INTEGER_to_BN(priv_key, NULL))!=NULL) ;
 350                 ASN1_INTEGER_free(priv_key);
 351                 if (!ret)
 352                         {
 353                         GOSTerr(GOST_F_PRIV_DECODE_GOST,
 354                                 EVP_R_DECODE_ERROR);
 355                         return 0;
 356                         }
 357                 }
 358
 359         ret= gost_set_priv_key(pk,pk_num);
 360         BN_free(pk_num);
 361         return ret;
 362         }
 363
 364 /* ----------------------------------------------------------------------*/
 365 static int priv_encode_gost(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pk)
 366         {
 367         ASN1_OBJECT *algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 368         ASN1_STRING *params = encode_gost_algor_params(pk);
 369         unsigned char *priv_buf = NULL;
 370         int priv_len;
 371
 372         ASN1_INTEGER *asn1key=NULL;
 373         if (!params)
 374                 {
 375                 return 0;
 376                 }
 377         asn1key = BN_to_ASN1_INTEGER(gost_get0_priv_key(pk),NULL);
 378         priv_len = i2d_ASN1_INTEGER(asn1key,&priv_buf);
 379         ASN1_INTEGER_free(asn1key);
 380         return PKCS8_pkey_set0(p8,algobj,0,V_ASN1_SEQUENCE,params,
 381                 priv_buf,priv_len);
 382         }
 383 /* --------- printing keys --------------------------------*/
 384 static int print_gost_94(BIO *out, const EVP_PKEY *pkey, int indent,
 385         ASN1_PCTX *pctx, int type)
 386         {
 387         int param_nid = NID_undef;
 388
 389         if (type == 2)
 390                 {
 391                 BIGNUM *key;
 392
 393                 if (!BIO_indent(out,indent,128)) return 0;
 394                 BIO_printf(out,"Private key: ");
 395                 key = gost_get0_priv_key(pkey);
 396                 if (!key)
 397                         BIO_printf(out,"<undefined>");
 398                 else
 399                         BN_print(out,key);
 400                 BIO_printf(out,"\n");
 401                 }
 402         if (type >= 1)
 403                 {
 404                 BIGNUM *pubkey;
 405
 406                 pubkey = ((DSA *)EVP_PKEY_get0((EVP_PKEY *)pkey))->pub_key;
 407                 BIO_indent(out,indent,128);
 408                 BIO_printf(out,"Public key: ");
 409                 BN_print(out,pubkey);
 410                 BIO_printf(out,"\n");
 411         }
 412
 413         param_nid = gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)pkey));
 414         BIO_indent(out,indent,128);
 415         BIO_printf(out, "Parameter set: %s\n",OBJ_nid2ln(param_nid));
 416         return 1;
 417 }
 418
 419 static int param_print_gost94(BIO *out, const EVP_PKEY *pkey, int indent,
 420         ASN1_PCTX *pctx)
 421         {
 422         return print_gost_94(out, pkey, indent, pctx,0);
 423         }
 424
 425 static int pub_print_gost94(BIO *out, const EVP_PKEY *pkey, int indent,
 426         ASN1_PCTX *pctx)
 427         {
 428         return print_gost_94(out,pkey, indent, pctx,1);
 429         }
 430 static int priv_print_gost94(BIO *out,const EVP_PKEY *pkey, int indent,
 431         ASN1_PCTX *pctx)
 432         {
 433         return print_gost_94(out,pkey,indent,pctx,2);
 434         }
 435
 436 static int print_gost_01(BIO *out, const EVP_PKEY *pkey, int indent,
 437         ASN1_PCTX *pctx, int type)
 438         {
 439         int param_nid = NID_undef;
 440         if (type == 2)
 441                 {
 442                 BIGNUM *key;
 443
 444                 if (!BIO_indent(out,indent,128)) return 0;
 445                 BIO_printf(out,"Private key: ");
 446                 key = gost_get0_priv_key(pkey);
 447                 if (!key)
 448                         BIO_printf(out,"<undefined)");
 449                 else
 450                         BN_print(out,key);
 451                 BIO_printf(out,"\n");
 452                 }
 453         if (type >= 1)
 454                 {
 455                 BN_CTX *ctx = BN_CTX_new();
 456                 BIGNUM *X,*Y;
 457                 const EC_POINT *pubkey;
 458                 const EC_GROUP *group;
 459
 460                 if (!ctx)
 461                         {
 462                         GOSTerr(GOST_F_PRINT_GOST_01,ERR_R_MALLOC_FAILURE);
 463                         return 0;
 464                         }
 465                 BN_CTX_start(ctx);
 466                 X = BN_CTX_get(ctx);
 467                 Y = BN_CTX_get(ctx);
 468                 pubkey = EC_KEY_get0_public_key((EC_KEY *)EVP_PKEY_get0((EVP_PKEY *)pkey));
 469                 group = EC_KEY_get0_group((EC_KEY *)EVP_PKEY_get0((EVP_PKEY *)pkey));
 470                 if (!EC_POINT_get_affine_coordinates_GFp(group,pubkey,X,Y,ctx))
 471                         {
 472                         GOSTerr(GOST_F_PRINT_GOST_01,ERR_R_EC_LIB);
 473                         BN_CTX_free(ctx);
 474                         return 0;
 475                         }
 476                 if (!BIO_indent(out,indent,128)) return 0;
 477                 BIO_printf(out,"Public key:\n");
 478                 if (!BIO_indent(out,indent+3,128)) return 0;
 479                 BIO_printf(out,"X:");
 480                 BN_print(out,X);
 481                 BIO_printf(out,"\n");
 482                 BIO_indent(out,indent+3,128);
 483                 BIO_printf(out,"Y:");
 484                 BN_print(out,Y);
 485                 BIO_printf(out,"\n");
 486                 BN_CTX_end(ctx);
 487                 BN_CTX_free(ctx);
 488                 }
 489
 490         param_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)pkey)));
 491         if (!BIO_indent(out,indent,128)) return 0;
 492         BIO_printf(out,"Parameter set: %s\n",OBJ_nid2ln(param_nid));
 493         return 1;
 494 }
 495 static int param_print_gost01(BIO *out, const EVP_PKEY *pkey, int indent,
 496         ASN1_PCTX *pctx)
 497         {
 498         return print_gost_01(out,pkey,indent,pctx,0);
 499         }
 500 static int pub_print_gost01(BIO *out, const EVP_PKEY *pkey, int indent,
 501         ASN1_PCTX *pctx)
 502         {
 503         return print_gost_01(out,pkey, indent, pctx,1);
 504         }
 505 static int priv_print_gost01(BIO *out,const EVP_PKEY *pkey, int indent,
 506         ASN1_PCTX *pctx)
 507         {
 508         return print_gost_01(out,pkey,indent,pctx,2);
 509         }
 510 /* ---------------------------------------------------------------------*/
 511 static int param_missing_gost94(const EVP_PKEY *pk)
 512         {
 513         const DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
 514         if (!dsa) return 1;
 515         if (!dsa->q) return 1;
 516         return 0;
 517         }
 518
 519 static int param_missing_gost01(const EVP_PKEY *pk)
 520         {
 521         const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
 522         if (!ec) return 1;
 523         if (!EC_KEY_get0_group(ec)) return 1;
 524         return 0;
 525         }
 526
 527 static int param_copy_gost94(EVP_PKEY *to, const EVP_PKEY *from)
 528         {
 529         const DSA *dfrom = EVP_PKEY_get0((EVP_PKEY *)from);
 530         DSA *dto = EVP_PKEY_get0(to);
 531         if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
 532                 {
 533                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 534                         GOST_R_INCOMPATIBLE_ALGORITHMS);
 535                 return 0;
 536                 }
 537         if (!dfrom)
 538                 {
 539                 GOSTerr(GOST_F_PARAM_COPY_GOST94,
 540                         GOST_R_KEY_PARAMETERS_MISSING);
 541                 return 0;
 542                 }
 543         if (!dto)
 544                 {
 545                 dto = DSA_new();
 546                 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),dto);
 547                 }
 548 #define COPYBIGNUM(a,b,x) if (a->x) BN_free(a->x); a->x=BN_dup(b->x);
 549         COPYBIGNUM(dto,dfrom,p)
 550                 COPYBIGNUM(dto,dfrom,q)
 551                 COPYBIGNUM(dto,dfrom,g)
 552
 553                 if (dto->priv_key)
 554                         gost94_compute_public(dto);
 555         return 1;
 556         }
 557 static int param_copy_gost01(EVP_PKEY *to, const EVP_PKEY *from)
 558         {
 559         EC_KEY *eto = EVP_PKEY_get0(to);
 560         const EC_KEY *efrom = EVP_PKEY_get0((EVP_PKEY *)from);
 561         if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
 562                 {
 563                 GOSTerr(GOST_F_PARAM_COPY_GOST01,
 564                         GOST_R_INCOMPATIBLE_ALGORITHMS);
 565                 return 0;
 566                 }
 567         if (!efrom)
 568                 {
 569                 GOSTerr(GOST_F_PARAM_COPY_GOST01,
 570                         GOST_R_KEY_PARAMETERS_MISSING);
 571                 return 0;
 572                 }
 573         if (!eto)
 574                 {
 575                 eto = EC_KEY_new();
 576                 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),eto);
 577                 }
 578         EC_KEY_set_group(eto,EC_KEY_get0_group(efrom));
 579         if (EC_KEY_get0_private_key(eto))
 580                 {
 581                 gost2001_compute_public(eto);
 582                 }
 583         return 1;
 584         }
 585
 586 static int param_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
 587         {
 588         const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
 589         const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
 590         if (!BN_cmp(da->q,db->q)) return 1;
 591         return 0;
 592         }
 593
 594 static int param_cmp_gost01(const EVP_PKEY *a, const EVP_PKEY *b)
 595         {
 596         if (EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)a)))==
 597                 EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)b))))
 598                 {
 599                 return 1;
 600                 }
 601         return 0;
 602
 603         }
 604
 605 /* ---------- Public key functions * --------------------------------------*/
 606 static int pub_decode_gost94(EVP_PKEY *pk, X509_PUBKEY *pub)
 607         {
 608         X509_ALGOR *palg = NULL;
 609         const unsigned char *pubkey_buf = NULL;
 610         unsigned char *databuf;
 611         ASN1_OBJECT *palgobj = NULL;
 612         int pub_len,i,j;
 613         DSA *dsa;
 614         ASN1_OCTET_STRING *octet= NULL;
 615
 616         if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
 617                         &palg, pub)) return 0;
 618         EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
 619         if (!decode_gost_algor_params(pk,palg)) return 0;
 620         octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
 621         if (!octet)
 622                 {
 623                 GOSTerr(GOST_F_PUB_DECODE_GOST94,ERR_R_MALLOC_FAILURE);
 624                 return 0;
 625                 }
 626         databuf = OPENSSL_malloc(octet->length);
 627         for (i=0,j=octet->length-1;i<octet->length;i++,j--)
 628                 {
 629                 databuf[j]=octet->data[i];
 630                 }
 631         dsa = EVP_PKEY_get0(pk);
 632         dsa->pub_key=BN_bin2bn(databuf,octet->length,NULL);
 633         ASN1_OCTET_STRING_free(octet);
 634         OPENSSL_free(databuf);
 635         return 1;
 636
 637         }
 638
 639 static int pub_encode_gost94(X509_PUBKEY *pub,const EVP_PKEY *pk)
 640         {
 641         ASN1_OBJECT *algobj = NULL;
 642         ASN1_OCTET_STRING *octet = NULL;
 643         void *pval = NULL;
 644         unsigned char *buf=NULL,*databuf,*sptr;
 645         int i,j,data_len,ret=0;
 646
 647         int ptype = V_ASN1_UNDEF;
 648         DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
 649         algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 650         if (pk->save_parameters)
 651                 {
 652                 ASN1_STRING *params = encode_gost_algor_params(pk);
 653                 pval = params;
 654                 ptype = V_ASN1_SEQUENCE;
 655                 }
 656         data_len = BN_num_bytes(dsa->pub_key);
 657         databuf = OPENSSL_malloc(data_len);
 658         BN_bn2bin(dsa->pub_key,databuf);
 659         octet = ASN1_OCTET_STRING_new();
 660         ASN1_STRING_set(octet,NULL,data_len);
 661         sptr = ASN1_STRING_data(octet);
 662         for (i=0,j=data_len-1; i< data_len;i++,j--)
 663                 {
 664                 sptr[i]=databuf[j];
 665                 }
 666         OPENSSL_free(databuf);
 667         ret = i2d_ASN1_OCTET_STRING(octet,&buf);
 668         ASN1_BIT_STRING_free(octet);
 669         if (ret <0)  return 0;
 670         return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
 671         }
 672
 673 static int pub_decode_gost01(EVP_PKEY *pk,X509_PUBKEY *pub)
 674         {
 675         X509_ALGOR *palg = NULL;
 676         const unsigned char *pubkey_buf = NULL;
 677         unsigned char *databuf;
 678         ASN1_OBJECT *palgobj = NULL;
 679         int pub_len,i,j;
 680         EC_POINT *pub_key;
 681         BIGNUM *X,*Y;
 682         ASN1_OCTET_STRING *octet= NULL;
 683         int len;
 684         const EC_GROUP *group;
 685
 686         if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
 687                         &palg, pub)) return 0;
 688         EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
 689         if (!decode_gost_algor_params(pk,palg)) return 0;
 690         group = EC_KEY_get0_group(EVP_PKEY_get0(pk));
 691         octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
 692         if (!octet)
 693                 {
 694                 GOSTerr(GOST_F_PUB_DECODE_GOST01,ERR_R_MALLOC_FAILURE);
 695                 return 0;
 696                 }
 697         databuf = OPENSSL_malloc(octet->length);
 698         for (i=0,j=octet->length-1;i<octet->length;i++,j--)
 699                 {
 700                 databuf[j]=octet->data[i];
 701                 }
 702         len=octet->length/2;
 703         ASN1_OCTET_STRING_free(octet);
 704
 705         Y= getbnfrombuf(databuf,len);
 706         X= getbnfrombuf(databuf+len,len);
 707         OPENSSL_free(databuf);
 708         pub_key = EC_POINT_new(group);
 709         if (!EC_POINT_set_affine_coordinates_GFp(group
 710                         ,pub_key,X,Y,NULL))
 711                 {
 712                 GOSTerr(GOST_F_PUB_DECODE_GOST01,
 713                         ERR_R_EC_LIB);
 714                 EC_POINT_free(pub_key);
 715                 BN_free(X);
 716                 BN_free(Y);
 717                 return 0;
 718                 }
 719         BN_free(X);
 720         BN_free(Y);
 721         if (!EC_KEY_set_public_key(EVP_PKEY_get0(pk),pub_key))
 722                 {
 723                 GOSTerr(GOST_F_PUB_DECODE_GOST01,
 724                         ERR_R_EC_LIB);
 725                 EC_POINT_free(pub_key);
 726                 return 0;
 727                 }
 728         EC_POINT_free(pub_key);
 729         return 1;
 730
 731         }
 732
 733 static int pub_encode_gost01(X509_PUBKEY *pub,const EVP_PKEY *pk)
 734         {
 735         ASN1_OBJECT *algobj = NULL;
 736         ASN1_OCTET_STRING *octet = NULL;
 737         void *pval = NULL;
 738         unsigned char *buf=NULL,*databuf,*sptr;
 739         int i,j,data_len,ret=0;
 740         const EC_POINT *pub_key;
 741         BIGNUM *X,*Y,*order;
 742         const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
 743         int ptype = V_ASN1_UNDEF;
 744
 745         algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
 746         if (pk->save_parameters)
 747                 {
 748                 ASN1_STRING *params = encode_gost_algor_params(pk);
 749                 pval = params;
 750                 ptype = V_ASN1_SEQUENCE;
 751                 }
 752         order = BN_new();
 753         EC_GROUP_get_order(EC_KEY_get0_group(ec),order,NULL);
 754         pub_key=EC_KEY_get0_public_key(ec);
 755         if (!pub_key)
 756                 {
 757                 GOSTerr(GOST_F_PUB_ENCODE_GOST01,
 758                         GOST_R_PUBLIC_KEY_UNDEFINED);
 759                 return 0;
 760                 }
 761         X=BN_new();
 762         Y=BN_new();
 763         EC_POINT_get_affine_coordinates_GFp(EC_KEY_get0_group(ec),
 764                 pub_key,X,Y,NULL);
 765         data_len = 2*BN_num_bytes(order);
 766         BN_free(order);
 767         databuf = OPENSSL_malloc(data_len);
 768         memset(databuf,0,data_len);
 769
 770         store_bignum(X,databuf+data_len/2,data_len/2);
 771         store_bignum(Y,databuf,data_len/2);
 772
 773         BN_free(X);
 774         BN_free(Y);
 775         octet = ASN1_OCTET_STRING_new();
 776         ASN1_STRING_set(octet,NULL,data_len);
 777         sptr=ASN1_STRING_data(octet);
 778     for (i=0,j=data_len-1;i<data_len;i++,j--)
 779                 {
 780         sptr[i]=databuf[j];
 781                 }
 782     OPENSSL_free(databuf);
 783         ret = i2d_ASN1_OCTET_STRING(octet,&buf);
 784         ASN1_BIT_STRING_free(octet);
 785         if (ret <0)  return 0;
 786         return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
 787         }
 788
 789 static int pub_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
 790         {
 791         const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
 792         const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
 793         if (da && db && da->pub_key && db->pub_key
 794                 && !BN_cmp(da->pub_key,db->pub_key))
 795                 {
 796                 return 1;
 797                 }
 798         return 0;
 799         }
 800
 801 static int pub_cmp_gost01(const EVP_PKEY *a,const EVP_PKEY *b)
 802         {
 803         const EC_KEY *ea = EVP_PKEY_get0((EVP_PKEY *)a);
 804         const EC_KEY *eb = EVP_PKEY_get0((EVP_PKEY *)b);
 805         const EC_POINT *ka,*kb;
 806         int ret=0;
 807         if (!ea || !eb) return 0;
 808         ka = EC_KEY_get0_public_key(ea);
 809         kb = EC_KEY_get0_public_key(eb);
 810         if (!ka || !kb) return 0;
 811         ret = (0==EC_POINT_cmp(EC_KEY_get0_group(ea),ka,kb,NULL)) ;
 812         return ret;
 813         }
 814
 815
 816
 817
 818 static int pkey_size_gost(const EVP_PKEY *pk)
 819         {
 820         return 64;
 821         }
 822
 823 static int pkey_bits_gost(const EVP_PKEY *pk)
 824         {
 825         return 256;
 826         }
 827 /*------------------------ ASN1 METHOD for GOST MAC  -------------------*/
 828 static void  mackey_free_gost(EVP_PKEY *pk)
 829         {
 830                 if (pk->pkey.ptr) {
 831                         OPENSSL_free(pk->pkey.ptr);
 832                 }
 833         }
 834 static int mac_ctrl_gost(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 835 {
 836         switch (op)
 837                 {
 838                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 839                         *(int *)arg2 = NID_id_Gost28147_89_MAC;
 840                         return 2;
 841                 }
 842         return -2;
 843 }
 844
 845 static int gost94_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
 846 {
 847    int nid=gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)pkey));
 848    return i2d_ASN1_OBJECT(OBJ_nid2obj(nid),pder);
 849 }
 850 static int gost2001_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
 851 {
 852    int nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)pkey)));
 853    return i2d_ASN1_OBJECT(OBJ_nid2obj(nid),pder);
 854 }
 855
 856 static int gost94_param_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen)
 857 {
 858         ASN1_OBJECT *obj=NULL;
 859         DSA *dsa = EVP_PKEY_get0(pkey);
 860         int nid;
 861         if (d2i_ASN1_OBJECT(&obj,pder,derlen)==NULL) {
 862                 return 0;
 863         }
 864         nid = OBJ_obj2nid(obj);
 865         ASN1_OBJECT_free(obj);
 866         if (!dsa)
 867                 {
 868                 dsa=DSA_new();
 869                 if (!EVP_PKEY_assign(pkey,NID_id_GostR3410_94,dsa)) return 0;
 870                 }
 871         if (!fill_GOST94_params(dsa,nid)) return 0;
 872         return 1;
 873 }
 874
 875 static int gost2001_param_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen) {
 876         ASN1_OBJECT *obj=NULL;
 877         int nid;
 878         EC_KEY *ec = EVP_PKEY_get0(pkey);
 879         if (d2i_ASN1_OBJECT(&obj,pder,derlen)==NULL) {
 880                 return 0;
 881         }
 882         nid = OBJ_obj2nid(obj);
 883         ASN1_OBJECT_free(obj);
 884         if (!ec)
 885                 {
 886                 ec = EC_KEY_new();
 887                 if (!EVP_PKEY_assign(pkey,NID_id_GostR3410_2001,ec)) return 0;
 888                 }
 889         if (!fill_GOST2001_params(ec, nid)) return 0;
 890         return 1;
 891 }
 892
 893
 894
 895
 896
 897 /* ----------------------------------------------------------------------*/
 898 int register_ameth_gost (int nid, EVP_PKEY_ASN1_METHOD **ameth, const char* pemstr, const char* info)
 899         {
 900         *ameth =        EVP_PKEY_asn1_new(nid,
 901                 ASN1_PKEY_SIGPARAM_NULL, pemstr, info);
 902         if (!*ameth) return 0;
 903         switch (nid)
 904                 {
 905                 case NID_id_GostR3410_94:
 906                         EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost94);
 907                         EVP_PKEY_asn1_set_private (*ameth,
 908                                 priv_decode_gost, priv_encode_gost,
 909                                 priv_print_gost94);
 910
 911                         EVP_PKEY_asn1_set_param (*ameth,
 912                                 gost94_param_decode, gost94_param_encode,
 913                                 param_missing_gost94, param_copy_gost94,
 914                                 param_cmp_gost94,param_print_gost94 );
 915                         EVP_PKEY_asn1_set_public (*ameth,
 916                                 pub_decode_gost94, pub_encode_gost94,
 917                                 pub_cmp_gost94, pub_print_gost94,
 918                                 pkey_size_gost, pkey_bits_gost);
 919
 920                         EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
 921                         break;
 922                 case NID_id_GostR3410_2001:
 923                         EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost01);
 924                         EVP_PKEY_asn1_set_private (*ameth,
 925                                 priv_decode_gost, priv_encode_gost,
 926                                 priv_print_gost01);
 927
 928                         EVP_PKEY_asn1_set_param (*ameth,
 929                                 gost2001_param_decode, gost2001_param_encode,
 930                                 param_missing_gost01, param_copy_gost01,
 931                                 param_cmp_gost01, param_print_gost01);
 932                         EVP_PKEY_asn1_set_public (*ameth,
 933                                 pub_decode_gost01, pub_encode_gost01,
 934                                 pub_cmp_gost01, pub_print_gost01,
 935                                 pkey_size_gost, pkey_bits_gost);
 936
 937                         EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
 938                         break;
 939                 case NID_id_Gost28147_89_MAC:
 940                         EVP_PKEY_asn1_set_free(*ameth, mackey_free_gost);
 941                         EVP_PKEY_asn1_set_ctrl(*ameth,mac_ctrl_gost);
 942                         break;
 943                 }
 944         return 1;
 945         }