1 /**********************************************************************
3 * Copyright (c) 2005-2006 Cryptocom LTD *
4 * This file is distributed under the same license as OpenSSL *
6 * Implementation of RFC 4357 (GOST R 34.10) Publick key method *
8 * Requires OpenSSL 0.9.9 for compilation *
9 **********************************************************************/
10 #include <openssl/evp.h>
11 #include <openssl/objects.h>
12 #include <openssl/ec.h>
13 #include <openssl/x509v3.h> /*For string_to_hex */
17 #include "gost_params.h"
19 #include "e_gost_err.h"
20 /*-------init, cleanup, copy - uniform for all algs ---------------*/
21 /* Allocates new gost_pmeth_data structure and assigns it as data */
22 static int pkey_gost_init(EVP_PKEY_CTX *ctx)
24 struct gost_pmeth_data *data;
25 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
26 data = OPENSSL_malloc(sizeof(struct gost_pmeth_data));
28 memset(data,0,sizeof(struct gost_pmeth_data));
29 if (pkey && EVP_PKEY_get0(pkey))
31 switch (EVP_PKEY_base_id(pkey)) {
32 case NID_id_GostR3410_94:
33 data->sign_param_nid = gost94_nid_by_params(EVP_PKEY_get0(pkey));
35 case NID_id_GostR3410_2001:
36 data->sign_param_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)pkey)));
42 EVP_PKEY_CTX_set_data(ctx,data);
46 /* Copies contents of gost_pmeth_data structure */
47 static int pkey_gost_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
49 struct gost_pmeth_data *dst_data,*src_data;
50 if (!pkey_gost_init(dst))
54 src_data = EVP_PKEY_CTX_get_data(src);
55 dst_data = EVP_PKEY_CTX_get_data(dst);
56 *dst_data = *src_data;
57 if (src_data -> shared_ukm) {
58 dst_data->shared_ukm=NULL;
63 /* Frees up gost_pmeth_data structure */
64 static void pkey_gost_cleanup (EVP_PKEY_CTX *ctx)
66 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
67 if (data->shared_ukm) OPENSSL_free(data->shared_ukm);
71 /* --------------------- control functions ------------------------------*/
72 static int pkey_gost_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
74 struct gost_pmeth_data *pctx = (struct gost_pmeth_data*)EVP_PKEY_CTX_get_data(ctx);
77 case EVP_PKEY_CTRL_MD:
79 if (EVP_MD_type((const EVP_MD *)p2) != NID_id_GostR3411_94)
81 GOSTerr(GOST_F_PKEY_GOST_CTRL, GOST_R_INVALID_DIGEST_TYPE);
84 pctx->md = (EVP_MD *)p2;
89 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
90 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
91 case EVP_PKEY_CTRL_PKCS7_SIGN:
94 case EVP_PKEY_CTRL_GOST_PARAMSET:
95 pctx->sign_param_nid = (int)p1;
97 case EVP_PKEY_CTRL_SET_IV:
98 pctx->shared_ukm=OPENSSL_malloc((int)p1);
99 memcpy(pctx->shared_ukm,p2,(int) p1);
101 case EVP_PKEY_CTRL_PEER_KEY:
102 if (p1 == 0 || p1 == 1) /* call from EVP_PKEY_derive_set_peer */
104 if (p1 == 2) /* TLS: peer key used? */
105 return pctx->peer_key_used;
106 if (p1 == 3) /* TLS: peer key used! */
107 return (pctx->peer_key_used = 1);
114 static int pkey_gost_ctrl94_str(EVP_PKEY_CTX *ctx,
115 const char *type, const char *value)
118 if(!strcmp(type, param_ctrl_string))
124 if (strlen(value) == 1)
126 switch(toupper(value[0]))
129 param_nid = NID_id_GostR3410_94_CryptoPro_A_ParamSet;
132 param_nid = NID_id_GostR3410_94_CryptoPro_B_ParamSet;
135 param_nid = NID_id_GostR3410_94_CryptoPro_C_ParamSet;
138 param_nid = NID_id_GostR3410_94_CryptoPro_D_ParamSet;
145 else if ((strlen(value) == 2) && (toupper(value[0]) == 'X'))
147 switch (toupper(value[1]))
150 param_nid = NID_id_GostR3410_94_CryptoPro_XchA_ParamSet;
153 param_nid = NID_id_GostR3410_94_CryptoPro_XchB_ParamSet;
156 param_nid = NID_id_GostR3410_94_CryptoPro_XchC_ParamSet;
165 R3410_params *p = R3410_paramset;
166 param_nid = OBJ_txt2nid(value);
167 if (param_nid == NID_undef)
171 for (;p->nid != NID_undef;p++)
173 if (p->nid == param_nid) break;
175 if (p->nid == NID_undef)
177 GOSTerr(GOST_F_PKEY_GOST_CTRL94_STR,
178 GOST_R_INVALID_PARAMSET);
183 return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
189 static int pkey_gost_ctrl01_str(EVP_PKEY_CTX *ctx,
190 const char *type, const char *value)
193 if(!strcmp(type, param_ctrl_string))
199 if (strlen(value) == 1)
201 switch(toupper(value[0]))
204 param_nid = NID_id_GostR3410_2001_CryptoPro_A_ParamSet;
207 param_nid = NID_id_GostR3410_2001_CryptoPro_B_ParamSet;
210 param_nid = NID_id_GostR3410_2001_CryptoPro_C_ParamSet;
213 param_nid = NID_id_GostR3410_2001_TestParamSet;
220 else if ((strlen(value) == 2) && (toupper(value[0]) == 'X'))
222 switch (toupper(value[1]))
225 param_nid = NID_id_GostR3410_2001_CryptoPro_XchA_ParamSet;
228 param_nid = NID_id_GostR3410_2001_CryptoPro_XchB_ParamSet;
237 R3410_2001_params *p = R3410_2001_paramset;
238 param_nid = OBJ_txt2nid(value);
239 if (param_nid == NID_undef)
243 for (;p->nid != NID_undef;p++)
245 if (p->nid == param_nid) break;
247 if (p->nid == NID_undef)
249 GOSTerr(GOST_F_PKEY_GOST_CTRL01_STR,
250 GOST_R_INVALID_PARAMSET);
255 return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
261 /* --------------------- key generation --------------------------------*/
263 static int pkey_gost_paramgen_init(EVP_PKEY_CTX *ctx) {
266 static int pkey_gost94_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
268 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
270 if (data->sign_param_nid == NID_undef)
272 GOSTerr(GOST_F_PKEY_GOST94_PARAMGEN,
273 GOST_R_NO_PARAMETERS_SET);
277 if (!fill_GOST94_params(dsa,data->sign_param_nid))
282 EVP_PKEY_assign(pkey,NID_id_GostR3410_94,dsa);
285 static int pkey_gost01_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
287 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
290 if (data->sign_param_nid == NID_undef)
292 GOSTerr(GOST_F_PKEY_GOST01_PARAMGEN,
293 GOST_R_NO_PARAMETERS_SET);
298 if (!fill_GOST2001_params(ec,data->sign_param_nid))
303 EVP_PKEY_assign(pkey,NID_id_GostR3410_2001,ec);
307 /* Generates Gost_R3410_94_cp key */
308 static int pkey_gost94cp_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
311 if (!pkey_gost94_paramgen(ctx,pkey)) return 0;
312 dsa = EVP_PKEY_get0(pkey);
313 gost_sign_keygen(dsa);
317 /* Generates GOST_R3410 2001 key and assigns it using specified type */
318 static int pkey_gost01cp_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
321 if (!pkey_gost01_paramgen(ctx,pkey)) return 0;
322 ec = EVP_PKEY_get0(pkey);
329 /* ----------- sign callbacks --------------------------------------*/
331 static int pkey_gost94_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
332 const unsigned char *tbs, size_t tbs_len)
334 DSA_SIG *unpacked_sig=NULL;
335 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
336 if (!siglen) return 0;
339 *siglen= 64; /* better to check size of pkey->pkey.dsa-q */
342 unpacked_sig = gost_do_sign(tbs,tbs_len,EVP_PKEY_get0(pkey));
347 return pack_sign_cp(unpacked_sig,32,sig,siglen);
350 static int pkey_gost01_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
351 const unsigned char *tbs, size_t tbs_len)
353 DSA_SIG *unpacked_sig=NULL;
354 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
355 if (!siglen) return 0;
358 *siglen= 64; /* better to check size of curve order*/
361 unpacked_sig = gost2001_do_sign(tbs,tbs_len,EVP_PKEY_get0(pkey));
366 return pack_sign_cp(unpacked_sig,32,sig,siglen);
369 /* ------------------- verify callbacks ---------------------------*/
371 static int pkey_gost94_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
372 size_t siglen, const unsigned char *tbs, size_t tbs_len)
375 EVP_PKEY* pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
376 DSA_SIG *s=unpack_cp_signature(sig,siglen);
378 if (pub_key) ok = gost_do_verify(tbs,tbs_len,s,EVP_PKEY_get0(pub_key));
384 static int pkey_gost01_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
385 size_t siglen, const unsigned char *tbs, size_t tbs_len)
388 EVP_PKEY* pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
389 DSA_SIG *s=unpack_cp_signature(sig,siglen);
392 fprintf(stderr,"R=");
393 BN_print_fp(stderr,s->r);
394 fprintf(stderr,"\nS=");
395 BN_print_fp(stderr,s->s);
396 fprintf(stderr,"\n");
398 if (pub_key) ok = gost2001_do_verify(tbs,tbs_len,s,EVP_PKEY_get0(pub_key));
403 /* ------------- encrypt init -------------------------------------*/
404 /* Generates ephermeral key */
405 static int pkey_gost_encrypt_init(EVP_PKEY_CTX *ctx)
409 /* --------------- Derive init ------------------------------------*/
410 static int pkey_gost_derive_init(EVP_PKEY_CTX *ctx)
414 /* -------- PKEY_METHOD for GOST MAC algorithm --------------------*/
415 static int pkey_gost_mac_init(EVP_PKEY_CTX *ctx)
417 struct gost_mac_pmeth_data *data;
418 data = OPENSSL_malloc(sizeof(struct gost_mac_pmeth_data));
420 memset(data,0,sizeof(struct gost_mac_pmeth_data));
421 EVP_PKEY_CTX_set_data(ctx,data);
424 static void pkey_gost_mac_cleanup (EVP_PKEY_CTX *ctx)
426 struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
429 static int pkey_gost_mac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
431 struct gost_mac_pmeth_data *dst_data,*src_data;
432 if (!pkey_gost_mac_init(dst))
436 src_data = EVP_PKEY_CTX_get_data(src);
437 dst_data = EVP_PKEY_CTX_get_data(dst);
438 *dst_data = *src_data;
442 static int pkey_gost_mac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
444 struct gost_mac_pmeth_data *data =
445 (struct gost_mac_pmeth_data*)EVP_PKEY_CTX_get_data(ctx);
449 case EVP_PKEY_CTRL_MD:
451 if (EVP_MD_type((const EVP_MD *)p2) != NID_id_Gost28147_89_MAC)
453 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL, GOST_R_INVALID_DIGEST_TYPE);
456 data->md = (EVP_MD *)p2;
461 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
462 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
463 case EVP_PKEY_CTRL_PKCS7_SIGN:
465 case EVP_PKEY_CTRL_SET_MAC_KEY:
468 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,
469 GOST_R_INVALID_MAC_KEY_LENGTH);
473 memcpy(data->key,p2,32);
476 case EVP_PKEY_CTRL_DIGESTINIT:
478 EVP_MD_CTX *mctx = p2;
482 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
485 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,GOST_R_MAC_KEY_NOT_SET);
488 key = EVP_PKEY_get0(pkey);
491 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,GOST_R_MAC_KEY_NOT_SET);
497 return mctx->digest->md_ctrl(mctx,EVP_MD_CTRL_SET_KEY,32,key);
502 static int pkey_gost_mac_ctrl_str(EVP_PKEY_CTX *ctx,
503 const char *type, const char *value)
505 if (!strcmp(type, key_ctrl_string))
507 if (strlen(value)!=32)
509 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR,
510 GOST_R_INVALID_MAC_KEY_LENGTH);
513 return pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
516 if (!strcmp(type, hexkey_ctrl_string))
518 long keylen; int ret;
519 unsigned char *keybuf=string_to_hex(value,&keylen);
522 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR,
523 GOST_R_INVALID_MAC_KEY_LENGTH);
526 ret= pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
528 OPENSSL_free(keybuf);
535 static int pkey_gost_mac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
537 struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
538 unsigned char *keydata;
541 GOSTerr(GOST_F_PKEY_GOST_MAC_KEYGEN,GOST_R_MAC_KEY_NOT_SET);
544 keydata = OPENSSL_malloc(32);
545 memcpy(keydata,data->key,32);
546 EVP_PKEY_assign(pkey, NID_id_Gost28147_89_MAC, keydata);
550 static int pkey_gost_mac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
555 static int pkey_gost_mac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, EVP_MD_CTX *mctx)
557 unsigned int tmpsiglen=*siglen; /* for platforms where sizeof(int)!=sizeof(size_t)*/
564 ret=EVP_DigestFinal_ex(mctx,sig,&tmpsiglen);
568 /* ----------------------------------------------------------------*/
569 int register_pmeth_gost(int id, EVP_PKEY_METHOD **pmeth,int flags)
571 *pmeth = EVP_PKEY_meth_new(id, flags);
572 if (!*pmeth) return 0;
576 case NID_id_GostR3410_94:
577 EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_ctrl, pkey_gost_ctrl94_str);
578 EVP_PKEY_meth_set_keygen(*pmeth,NULL,pkey_gost94cp_keygen);
579 EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost94_cp_sign);
580 EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost94_cp_verify);
581 EVP_PKEY_meth_set_encrypt(*pmeth,
582 pkey_gost_encrypt_init, pkey_GOST94cp_encrypt);
583 EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST94cp_decrypt);
584 EVP_PKEY_meth_set_derive(*pmeth,
585 pkey_gost_derive_init, pkey_gost94_derive);
586 EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init,pkey_gost94_paramgen);
588 case NID_id_GostR3410_2001:
589 EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_ctrl, pkey_gost_ctrl01_str);
590 EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost01_cp_sign);
591 EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost01_cp_verify);
593 EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost01cp_keygen);
595 EVP_PKEY_meth_set_encrypt(*pmeth,
596 pkey_gost_encrypt_init, pkey_GOST01cp_encrypt);
597 EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST01cp_decrypt);
598 EVP_PKEY_meth_set_derive(*pmeth,
599 pkey_gost_derive_init, pkey_gost2001_derive);
600 EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init,pkey_gost01_paramgen);
602 case NID_id_Gost28147_89_MAC:
603 EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_mac_ctrl, pkey_gost_mac_ctrl_str);
604 EVP_PKEY_meth_set_signctx(*pmeth,pkey_gost_mac_signctx_init, pkey_gost_mac_signctx);
605 EVP_PKEY_meth_set_keygen(*pmeth,NULL, pkey_gost_mac_keygen);
606 EVP_PKEY_meth_set_init(*pmeth,pkey_gost_mac_init);
607 EVP_PKEY_meth_set_cleanup(*pmeth,pkey_gost_mac_cleanup);
608 EVP_PKEY_meth_set_copy(*pmeth,pkey_gost_mac_copy);
610 default: /*Unsupported method*/
613 EVP_PKEY_meth_set_init(*pmeth, pkey_gost_init);
614 EVP_PKEY_meth_set_cleanup(*pmeth, pkey_gost_cleanup);
616 EVP_PKEY_meth_set_copy(*pmeth, pkey_gost_copy);
617 /*FIXME derive etc...*/