1. Changes for s_client.c to make it return non-zero exit code in case
[openssl.git] / 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         }