source: openssl/trunk/engines/ccgost/gost_ameth.c@ 808

Last change on this file since 808 was 808, checked in by dmik, 11 years ago

openssl: Merge version 1.0.0n from vendor to trunk.
File size: 22.2 KB
Line 
1/**********************************************************************
2 * gost_ameth.c *
3 * Copyright (c) 2005-2006 Cryptocom LTD *
4 * This file is distributed under the same license as OpenSSL *
5 * *
6 * Implementation of RFC 4490/4491 ASN1 method *
7 * for OpenSSL *
8 * Requires OpenSSL 0.9.9 for compilation *
9 **********************************************************************/
10#include <string.h>
11#include <openssl/crypto.h>
12#include <openssl/err.h>
13#include <openssl/engine.h>
14#include <openssl/evp.h>
15#include <openssl/asn1.h>
16#include "gost_params.h"
17#include "gost_lcl.h"
18#include "e_gost_err.h"
19
20int gost94_nid_by_params(DSA *p)
21 {
22 R3410_params *gost_params;
23 BIGNUM *q=BN_new();
24 for (gost_params = R3410_paramset;gost_params->q!=NULL; gost_params++)
25 {
26 BN_dec2bn(&q,gost_params->q);
27 if (!BN_cmp(q,p->q))
28 {
29 BN_free(q);
30 return gost_params->nid;
31 }
32 }
33 BN_free(q);
34 return NID_undef;
35 }
36
37static ASN1_STRING *encode_gost_algor_params(const EVP_PKEY *key)
38 {
39 ASN1_STRING *params = ASN1_STRING_new();
40 GOST_KEY_PARAMS *gkp = GOST_KEY_PARAMS_new();
41 int pkey_param_nid = NID_undef;
42
43 if (!params || !gkp)
44 {
45 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
46 ERR_R_MALLOC_FAILURE);
47 ASN1_STRING_free(params);
48 params = NULL;
49 goto err;
50 }
51 switch (EVP_PKEY_base_id(key))
52 {
53 case NID_id_GostR3410_2001:
54 pkey_param_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)key)));
55 break;
56 case NID_id_GostR3410_94:
57 pkey_param_nid = (int) gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)key));
58 if (pkey_param_nid == NID_undef)
59 {
60 GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
61 GOST_R_INVALID_GOST94_PARMSET);
62 ASN1_STRING_free(params);
63 params=NULL;
64 goto err;
65 }
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 */
89static 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
148static 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 }
181BIGNUM* 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
212static 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 * ------------------------------*/
255static void pkey_free_gost94(EVP_PKEY *key)
256 {
257 if (key->pkey.dsa)
258 {
259 DSA_free(key->pkey.dsa);
260 }
261 }
262
263static 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 -----------------------------*/
272static 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,
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,
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/* ----------------------------------------------------------------------*/
328static 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/* --------- printing keys --------------------------------*/
347static int print_gost_94(BIO *out, const EVP_PKEY *pkey, int indent,
348 ASN1_PCTX *pctx, int type)
349 {
350 int param_nid = NID_undef;
351
352 if (type == 2)
353 {
354 BIGNUM *key;
355
356 if (!BIO_indent(out,indent,128)) return 0;
357 BIO_printf(out,"Private key: ");
358 key = gost_get0_priv_key(pkey);
359 if (!key)
360 BIO_printf(out,"<undefined>");
361 else
362 BN_print(out,key);
363 BIO_printf(out,"\n");
364 }
365 if (type >= 1)
366 {
367 BIGNUM *pubkey;
368
369 pubkey = ((DSA *)EVP_PKEY_get0((EVP_PKEY *)pkey))->pub_key;
370 BIO_indent(out,indent,128);
371 BIO_printf(out,"Public key: ");
372 BN_print(out,pubkey);
373 BIO_printf(out,"\n");
374 }
375
376 param_nid = gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)pkey));
377 BIO_indent(out,indent,128);
378 BIO_printf(out, "Parameter set: %s\n",OBJ_nid2ln(param_nid));
379 return 1;
380}
381
382static int param_print_gost94(BIO *out, const EVP_PKEY *pkey, int indent,
383 ASN1_PCTX *pctx)
384 {
385 return print_gost_94(out, pkey, indent, pctx,0);
386 }
387
388static int pub_print_gost94(BIO *out, const EVP_PKEY *pkey, int indent,
389 ASN1_PCTX *pctx)
390 {
391 return print_gost_94(out,pkey, indent, pctx,1);
392 }
393static int priv_print_gost94(BIO *out,const EVP_PKEY *pkey, int indent,
394 ASN1_PCTX *pctx)
395 {
396 return print_gost_94(out,pkey,indent,pctx,2);
397 }
398
399static int print_gost_01(BIO *out, const EVP_PKEY *pkey, int indent,
400 ASN1_PCTX *pctx, int type)
401 {
402 int param_nid = NID_undef;
403 if (type == 2)
404 {
405 BIGNUM *key;
406
407 if (!BIO_indent(out,indent,128)) return 0;
408 BIO_printf(out,"Private key: ");
409 key = gost_get0_priv_key(pkey);
410 if (!key)
411 BIO_printf(out,"<undefined)");
412 else
413 BN_print(out,key);
414 BIO_printf(out,"\n");
415 }
416 if (type >= 1)
417 {
418 BN_CTX *ctx = BN_CTX_new();
419 BIGNUM *X,*Y;
420 const EC_POINT *pubkey;
421 const EC_GROUP *group;
422
423 if (!ctx)
424 {
425 GOSTerr(GOST_F_PRINT_GOST_01,ERR_R_MALLOC_FAILURE);
426 return 0;
427 }
428 BN_CTX_start(ctx);
429 X = BN_CTX_get(ctx);
430 Y = BN_CTX_get(ctx);
431 pubkey = EC_KEY_get0_public_key((EC_KEY *)EVP_PKEY_get0((EVP_PKEY *)pkey));
432 group = EC_KEY_get0_group((EC_KEY *)EVP_PKEY_get0((EVP_PKEY *)pkey));
433 if (!EC_POINT_get_affine_coordinates_GFp(group,pubkey,X,Y,ctx))
434 {
435 GOSTerr(GOST_F_PRINT_GOST_01,ERR_R_EC_LIB);
436 BN_CTX_free(ctx);
437 return 0;
438 }
439 if (!BIO_indent(out,indent,128)) return 0;
440 BIO_printf(out,"Public key:\n");
441 if (!BIO_indent(out,indent+3,128)) return 0;
442 BIO_printf(out,"X:");
443 BN_print(out,X);
444 BIO_printf(out,"\n");
445 BIO_indent(out,indent+3,128);
446 BIO_printf(out,"Y:");
447 BN_print(out,Y);
448 BIO_printf(out,"\n");
449 BN_CTX_end(ctx);
450 BN_CTX_free(ctx);
451 }
452
453 param_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)pkey)));
454 if (!BIO_indent(out,indent,128)) return 0;
455 BIO_printf(out,"Parameter set: %s\n",OBJ_nid2ln(param_nid));
456 return 1;
457}
458static int param_print_gost01(BIO *out, const EVP_PKEY *pkey, int indent,
459 ASN1_PCTX *pctx)
460 {
461 return print_gost_01(out,pkey,indent,pctx,0);
462 }
463static int pub_print_gost01(BIO *out, const EVP_PKEY *pkey, int indent,
464 ASN1_PCTX *pctx)
465 {
466 return print_gost_01(out,pkey, indent, pctx,1);
467 }
468static int priv_print_gost01(BIO *out,const EVP_PKEY *pkey, int indent,
469 ASN1_PCTX *pctx)
470 {
471 return print_gost_01(out,pkey,indent,pctx,2);
472 }
473/* ---------------------------------------------------------------------*/
474static int param_missing_gost94(const EVP_PKEY *pk)
475 {
476 const DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
477 if (!dsa) return 1;
478 if (!dsa->q) return 1;
479 return 0;
480 }
481
482static int param_missing_gost01(const EVP_PKEY *pk)
483 {
484 const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
485 if (!ec) return 1;
486 if (!EC_KEY_get0_group(ec)) return 1;
487 return 0;
488 }
489
490static int param_copy_gost94(EVP_PKEY *to, const EVP_PKEY *from)
491 {
492 const DSA *dfrom = EVP_PKEY_get0((EVP_PKEY *)from);
493 DSA *dto = EVP_PKEY_get0(to);
494 if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
495 {
496 GOSTerr(GOST_F_PARAM_COPY_GOST94,
497 GOST_R_INCOMPATIBLE_ALGORITHMS);
498 return 0;
499 }
500 if (!dfrom)
501 {
502 GOSTerr(GOST_F_PARAM_COPY_GOST94,
503 GOST_R_KEY_PARAMETERS_MISSING);
504 return 0;
505 }
506 if (!dto)
507 {
508 dto = DSA_new();
509 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),dto);
510 }
511#define COPYBIGNUM(a,b,x) if (a->x) BN_free(a->x); a->x=BN_dup(b->x);
512 COPYBIGNUM(dto,dfrom,p)
513 COPYBIGNUM(dto,dfrom,q)
514 COPYBIGNUM(dto,dfrom,g)
515
516 if (dto->priv_key)
517 gost94_compute_public(dto);
518 return 1;
519 }
520static int param_copy_gost01(EVP_PKEY *to, const EVP_PKEY *from)
521 {
522 EC_KEY *eto = EVP_PKEY_get0(to);
523 const EC_KEY *efrom = EVP_PKEY_get0((EVP_PKEY *)from);
524 if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
525 {
526 GOSTerr(GOST_F_PARAM_COPY_GOST01,
527 GOST_R_INCOMPATIBLE_ALGORITHMS);
528 return 0;
529 }
530 if (!efrom)
531 {
532 GOSTerr(GOST_F_PARAM_COPY_GOST01,
533 GOST_R_KEY_PARAMETERS_MISSING);
534 return 0;
535 }
536 if (!eto)
537 {
538 eto = EC_KEY_new();
539 EVP_PKEY_assign(to,EVP_PKEY_base_id(from),eto);
540 }
541 EC_KEY_set_group(eto,EC_KEY_get0_group(efrom));
542 if (EC_KEY_get0_private_key(eto))
543 {
544 gost2001_compute_public(eto);
545 }
546 return 1;
547 }
548
549static int param_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
550 {
551 const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
552 const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
553 if (!BN_cmp(da->q,db->q)) return 1;
554 return 0;
555 }
556
557static int param_cmp_gost01(const EVP_PKEY *a, const EVP_PKEY *b)
558 {
559 if (EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)a)))==
560 EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)b))))
561 {
562 return 1;
563 }
564 return 0;
565
566 }
567
568/* ---------- Public key functions * --------------------------------------*/
569static int pub_decode_gost94(EVP_PKEY *pk, X509_PUBKEY *pub)
570 {
571 X509_ALGOR *palg = NULL;
572 const unsigned char *pubkey_buf = NULL;
573 unsigned char *databuf;
574 ASN1_OBJECT *palgobj = NULL;
575 int pub_len,i,j;
576 DSA *dsa;
577 ASN1_OCTET_STRING *octet= NULL;
578
579 if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
580 &palg, pub)) return 0;
581 EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
582 if (!decode_gost_algor_params(pk,palg)) return 0;
583 octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
584 if (!octet)
585 {
586 GOSTerr(GOST_F_PUB_DECODE_GOST94,ERR_R_MALLOC_FAILURE);
587 return 0;
588 }
589 databuf = OPENSSL_malloc(octet->length);
590 for (i=0,j=octet->length-1;i<octet->length;i++,j--)
591 {
592 databuf[j]=octet->data[i];
593 }
594 dsa = EVP_PKEY_get0(pk);
595 dsa->pub_key=BN_bin2bn(databuf,octet->length,NULL);
596 ASN1_OCTET_STRING_free(octet);
597 OPENSSL_free(databuf);
598 return 1;
599
600 }
601
602static int pub_encode_gost94(X509_PUBKEY *pub,const EVP_PKEY *pk)
603 {
604 ASN1_OBJECT *algobj = NULL;
605 ASN1_OCTET_STRING *octet = NULL;
606 void *pval = NULL;
607 unsigned char *buf=NULL,*databuf,*sptr;
608 int i,j,data_len,ret=0;
609
610 int ptype = V_ASN1_UNDEF;
611 DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
612 algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
613 if (pk->save_parameters)
614 {
615 ASN1_STRING *params = encode_gost_algor_params(pk);
616 pval = params;
617 ptype = V_ASN1_SEQUENCE;
618 }
619 data_len = BN_num_bytes(dsa->pub_key);
620 databuf = OPENSSL_malloc(data_len);
621 BN_bn2bin(dsa->pub_key,databuf);
622 octet = ASN1_OCTET_STRING_new();
623 ASN1_STRING_set(octet,NULL,data_len);
624 sptr = ASN1_STRING_data(octet);
625 for (i=0,j=data_len-1; i< data_len;i++,j--)
626 {
627 sptr[i]=databuf[j];
628 }
629 OPENSSL_free(databuf);
630 ret = i2d_ASN1_OCTET_STRING(octet,&buf);
631 ASN1_BIT_STRING_free(octet);
632 if (ret <0) return 0;
633 return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
634 }
635
636static int pub_decode_gost01(EVP_PKEY *pk,X509_PUBKEY *pub)
637 {
638 X509_ALGOR *palg = NULL;
639 const unsigned char *pubkey_buf = NULL;
640 unsigned char *databuf;
641 ASN1_OBJECT *palgobj = NULL;
642 int pub_len,i,j;
643 EC_POINT *pub_key;
644 BIGNUM *X,*Y;
645 ASN1_OCTET_STRING *octet= NULL;
646 int len;
647 const EC_GROUP *group;
648
649 if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
650 &palg, pub)) return 0;
651 EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
652 if (!decode_gost_algor_params(pk,palg)) return 0;
653 group = EC_KEY_get0_group(EVP_PKEY_get0(pk));
654 octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
655 if (!octet)
656 {
657 GOSTerr(GOST_F_PUB_DECODE_GOST01,ERR_R_MALLOC_FAILURE);
658 return 0;
659 }
660 databuf = OPENSSL_malloc(octet->length);
661 for (i=0,j=octet->length-1;i<octet->length;i++,j--)
662 {
663 databuf[j]=octet->data[i];
664 }
665 len=octet->length/2;
666 ASN1_OCTET_STRING_free(octet);
667
668 Y= getbnfrombuf(databuf,len);
669 X= getbnfrombuf(databuf+len,len);
670 OPENSSL_free(databuf);
671 pub_key = EC_POINT_new(group);
672 if (!EC_POINT_set_affine_coordinates_GFp(group
673 ,pub_key,X,Y,NULL))
674 {
675 GOSTerr(GOST_F_PUB_DECODE_GOST01,
676 ERR_R_EC_LIB);
677 EC_POINT_free(pub_key);
678 BN_free(X);
679 BN_free(Y);
680 return 0;
681 }
682 BN_free(X);
683 BN_free(Y);
684 if (!EC_KEY_set_public_key(EVP_PKEY_get0(pk),pub_key))
685 {
686 GOSTerr(GOST_F_PUB_DECODE_GOST01,
687 ERR_R_EC_LIB);
688 EC_POINT_free(pub_key);
689 return 0;
690 }
691 EC_POINT_free(pub_key);
692 return 1;
693
694 }
695
696static int pub_encode_gost01(X509_PUBKEY *pub,const EVP_PKEY *pk)
697 {
698 ASN1_OBJECT *algobj = NULL;
699 ASN1_OCTET_STRING *octet = NULL;
700 void *pval = NULL;
701 unsigned char *buf=NULL,*databuf,*sptr;
702 int i,j,data_len,ret=0;
703 const EC_POINT *pub_key;
704 BIGNUM *X,*Y,*order;
705 const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
706 int ptype = V_ASN1_UNDEF;
707
708 algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
709 if (pk->save_parameters)
710 {
711 ASN1_STRING *params = encode_gost_algor_params(pk);
712 pval = params;
713 ptype = V_ASN1_SEQUENCE;
714 }
715 order = BN_new();
716 EC_GROUP_get_order(EC_KEY_get0_group(ec),order,NULL);
717 pub_key=EC_KEY_get0_public_key(ec);
718 if (!pub_key)
719 {
720 GOSTerr(GOST_F_PUB_ENCODE_GOST01,
721 GOST_R_PUBLIC_KEY_UNDEFINED);
722 return 0;
723 }
724 X=BN_new();
725 Y=BN_new();
726 EC_POINT_get_affine_coordinates_GFp(EC_KEY_get0_group(ec),
727 pub_key,X,Y,NULL);
728 data_len = 2*BN_num_bytes(order);
729 BN_free(order);
730 databuf = OPENSSL_malloc(data_len);
731 memset(databuf,0,data_len);
732
733 store_bignum(X,databuf+data_len/2,data_len/2);
734 store_bignum(Y,databuf,data_len/2);
735
736 BN_free(X);
737 BN_free(Y);
738 octet = ASN1_OCTET_STRING_new();
739 ASN1_STRING_set(octet,NULL,data_len);
740 sptr=ASN1_STRING_data(octet);
741 for (i=0,j=data_len-1;i<data_len;i++,j--)
742 {
743 sptr[i]=databuf[j];
744 }
745 OPENSSL_free(databuf);
746 ret = i2d_ASN1_OCTET_STRING(octet,&buf);
747 ASN1_BIT_STRING_free(octet);
748 if (ret <0) return 0;
749 return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
750 }
751
752static int pub_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
753 {
754 const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
755 const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
756 if (da && db && da->pub_key && db->pub_key
757 && !BN_cmp(da->pub_key,db->pub_key))
758 {
759 return 1;
760 }
761 return 0;
762 }
763
764static int pub_cmp_gost01(const EVP_PKEY *a,const EVP_PKEY *b)
765 {
766 const EC_KEY *ea = EVP_PKEY_get0((EVP_PKEY *)a);
767 const EC_KEY *eb = EVP_PKEY_get0((EVP_PKEY *)b);
768 const EC_POINT *ka,*kb;
769 int ret=0;
770 if (!ea || !eb) return 0;
771 ka = EC_KEY_get0_public_key(ea);
772 kb = EC_KEY_get0_public_key(eb);
773 if (!ka || !kb) return 0;
774 ret = (0==EC_POINT_cmp(EC_KEY_get0_group(ea),ka,kb,NULL)) ;
775 return ret;
776 }
777
778
779
780
781static int pkey_size_gost(const EVP_PKEY *pk)
782 {
783 return 64;
784 }
785
786static int pkey_bits_gost(const EVP_PKEY *pk)
787 {
788 return 256;
789 }
790/*------------------------ ASN1 METHOD for GOST MAC -------------------*/
791static void mackey_free_gost(EVP_PKEY *pk)
792 {
793 if (pk->pkey.ptr) {
794 OPENSSL_free(pk->pkey.ptr);
795 }
796 }
797static int mac_ctrl_gost(EVP_PKEY *pkey, int op, long arg1, void *arg2)
798{
799 switch (op)
800 {
801 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
802 *(int *)arg2 = NID_id_Gost28147_89_MAC;
803 return 2;
804 }
805 return -2;
806}
807
808static int gost94_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
809{
810 int nid=gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)pkey));
811 return i2d_ASN1_OBJECT(OBJ_nid2obj(nid),pder);
812}
813static int gost2001_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
814{
815 int nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)pkey)));
816 return i2d_ASN1_OBJECT(OBJ_nid2obj(nid),pder);
817}
818
819static int gost94_param_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen)
820{
821 ASN1_OBJECT *obj=NULL;
822 DSA *dsa = EVP_PKEY_get0(pkey);
823 int nid;
824 if (d2i_ASN1_OBJECT(&obj,pder,derlen)==NULL) {
825 return 0;
826 }
827 nid = OBJ_obj2nid(obj);
828 ASN1_OBJECT_free(obj);
829 if (!dsa)
830 {
831 dsa=DSA_new();
832 if (!EVP_PKEY_assign(pkey,NID_id_GostR3410_94,dsa)) return 0;
833 }
834 if (!fill_GOST94_params(dsa,nid)) return 0;
835 return 1;
836}
837
838static int gost2001_param_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen) {
839 ASN1_OBJECT *obj=NULL;
840 int nid;
841 EC_KEY *ec = EVP_PKEY_get0(pkey);
842 if (d2i_ASN1_OBJECT(&obj,pder,derlen)==NULL) {
843 return 0;
844 }
845 nid = OBJ_obj2nid(obj);
846 ASN1_OBJECT_free(obj);
847 if (!ec)
848 {
849 ec = EC_KEY_new();
850 if (!EVP_PKEY_assign(pkey,NID_id_GostR3410_2001,ec)) return 0;
851 }
852 if (!fill_GOST2001_params(ec, nid)) return 0;
853 return 1;
854}
855
856
857
858
859
860/* ----------------------------------------------------------------------*/
861int register_ameth_gost (int nid, EVP_PKEY_ASN1_METHOD **ameth, const char* pemstr, const char* info)
862 {
863 *ameth = EVP_PKEY_asn1_new(nid,
864 ASN1_PKEY_SIGPARAM_NULL, pemstr, info);
865 if (!*ameth) return 0;
866 switch (nid)
867 {
868 case NID_id_GostR3410_94:
869 EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost94);
870 EVP_PKEY_asn1_set_private (*ameth,
871 priv_decode_gost, priv_encode_gost,
872 priv_print_gost94);
873
874 EVP_PKEY_asn1_set_param (*ameth,
875 gost94_param_decode, gost94_param_encode,
876 param_missing_gost94, param_copy_gost94,
877 param_cmp_gost94,param_print_gost94 );
878 EVP_PKEY_asn1_set_public (*ameth,
879 pub_decode_gost94, pub_encode_gost94,
880 pub_cmp_gost94, pub_print_gost94,
881 pkey_size_gost, pkey_bits_gost);
882
883 EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
884 break;
885 case NID_id_GostR3410_2001:
886 EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost01);
887 EVP_PKEY_asn1_set_private (*ameth,
888 priv_decode_gost, priv_encode_gost,
889 priv_print_gost01);
890
891 EVP_PKEY_asn1_set_param (*ameth,
892 gost2001_param_decode, gost2001_param_encode,
893 param_missing_gost01, param_copy_gost01,
894 param_cmp_gost01, param_print_gost01);
895 EVP_PKEY_asn1_set_public (*ameth,
896 pub_decode_gost01, pub_encode_gost01,
897 pub_cmp_gost01, pub_print_gost01,
898 pkey_size_gost, pkey_bits_gost);
899
900 EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
901 break;
902 case NID_id_Gost28147_89_MAC:
903 EVP_PKEY_asn1_set_free(*ameth, mackey_free_gost);
904 EVP_PKEY_asn1_set_ctrl(*ameth,mac_ctrl_gost);
905 break;
906 }
907 return 1;
908 }
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