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/err.h>
14 #include <openssl/x509v3.h> /* For string_to_hex */
18 #include "gost_params.h"
20 #include "e_gost_err.h"
21 /* -----init, cleanup, copy - uniform for all algs ---------------*/
22 /* Allocates new gost_pmeth_data structure and assigns it as data */
23 static int pkey_gost_init(EVP_PKEY_CTX *ctx)
25 struct gost_pmeth_data *data;
26 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
27 data = OPENSSL_malloc(sizeof(struct gost_pmeth_data));
30 memset(data, 0, sizeof(struct gost_pmeth_data));
31 if (pkey && EVP_PKEY_get0(pkey)) {
32 switch (EVP_PKEY_base_id(pkey)) {
33 case NID_id_GostR3410_94:
34 data->sign_param_nid = gost94_nid_by_params(EVP_PKEY_get0(pkey));
36 case NID_id_GostR3410_2001:
37 data->sign_param_nid =
38 EC_GROUP_get_curve_name(EC_KEY_get0_group
39 (EVP_PKEY_get0((EVP_PKEY *)pkey)));
45 EVP_PKEY_CTX_set_data(ctx, data);
49 /* Copies contents of gost_pmeth_data structure */
50 static int pkey_gost_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
52 struct gost_pmeth_data *dst_data, *src_data;
53 if (!pkey_gost_init(dst)) {
56 src_data = EVP_PKEY_CTX_get_data(src);
57 dst_data = EVP_PKEY_CTX_get_data(dst);
58 *dst_data = *src_data;
59 if (src_data->shared_ukm) {
60 dst_data->shared_ukm = NULL;
65 /* Frees up gost_pmeth_data structure */
66 static void pkey_gost_cleanup(EVP_PKEY_CTX *ctx)
68 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
70 OPENSSL_free(data->shared_ukm);
74 /* --------------------- control functions ------------------------------*/
75 static int pkey_gost_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
77 struct gost_pmeth_data *pctx =
78 (struct gost_pmeth_data *)EVP_PKEY_CTX_get_data(ctx);
80 case EVP_PKEY_CTRL_MD:
82 if (EVP_MD_type((const EVP_MD *)p2) != NID_id_GostR3411_94) {
83 GOSTerr(GOST_F_PKEY_GOST_CTRL, GOST_R_INVALID_DIGEST_TYPE);
86 pctx->md = (EVP_MD *)p2;
90 case EVP_PKEY_CTRL_GET_MD:
91 *(const EVP_MD **)p2 = pctx->md;
94 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
95 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
96 case EVP_PKEY_CTRL_PKCS7_SIGN:
97 case EVP_PKEY_CTRL_DIGESTINIT:
98 #ifndef OPENSSL_NO_CMS
99 case EVP_PKEY_CTRL_CMS_ENCRYPT:
100 case EVP_PKEY_CTRL_CMS_DECRYPT:
101 case EVP_PKEY_CTRL_CMS_SIGN:
105 case EVP_PKEY_CTRL_GOST_PARAMSET:
106 pctx->sign_param_nid = (int)p1;
108 case EVP_PKEY_CTRL_SET_IV:
109 pctx->shared_ukm = OPENSSL_malloc((int)p1);
110 if (pctx->shared_ukm == NULL) {
111 GOSTerr(GOST_F_PKEY_GOST_CTRL, ERR_R_MALLOC_FAILURE);
114 memcpy(pctx->shared_ukm, p2, (int)p1);
116 case EVP_PKEY_CTRL_PEER_KEY:
117 if (p1 == 0 || p1 == 1) /* call from EVP_PKEY_derive_set_peer */
119 if (p1 == 2) /* TLS: peer key used? */
120 return pctx->peer_key_used;
121 if (p1 == 3) /* TLS: peer key used! */
122 return (pctx->peer_key_used = 1);
128 static int pkey_gost_ctrl94_str(EVP_PKEY_CTX *ctx,
129 const char *type, const char *value)
132 if (!strcmp(type, param_ctrl_string)) {
136 if (strlen(value) == 1) {
137 switch (toupper((unsigned char)value[0])) {
139 param_nid = NID_id_GostR3410_94_CryptoPro_A_ParamSet;
142 param_nid = NID_id_GostR3410_94_CryptoPro_B_ParamSet;
145 param_nid = NID_id_GostR3410_94_CryptoPro_C_ParamSet;
148 param_nid = NID_id_GostR3410_94_CryptoPro_D_ParamSet;
153 } else if ((strlen(value) == 2)
154 && (toupper((unsigned char)value[0]) == 'X')) {
155 switch (toupper((unsigned char)value[1])) {
157 param_nid = NID_id_GostR3410_94_CryptoPro_XchA_ParamSet;
160 param_nid = NID_id_GostR3410_94_CryptoPro_XchB_ParamSet;
163 param_nid = NID_id_GostR3410_94_CryptoPro_XchC_ParamSet;
169 R3410_params *p = R3410_paramset;
170 param_nid = OBJ_txt2nid(value);
171 if (param_nid == NID_undef) {
174 for (; p->nid != NID_undef; p++) {
175 if (p->nid == param_nid)
178 if (p->nid == NID_undef) {
179 GOSTerr(GOST_F_PKEY_GOST_CTRL94_STR, GOST_R_INVALID_PARAMSET);
184 return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
190 static int pkey_gost_ctrl01_str(EVP_PKEY_CTX *ctx,
191 const char *type, const char *value)
194 if (!strcmp(type, param_ctrl_string)) {
198 if (strlen(value) == 1) {
199 switch (toupper((unsigned char)value[0])) {
201 param_nid = NID_id_GostR3410_2001_CryptoPro_A_ParamSet;
204 param_nid = NID_id_GostR3410_2001_CryptoPro_B_ParamSet;
207 param_nid = NID_id_GostR3410_2001_CryptoPro_C_ParamSet;
210 param_nid = NID_id_GostR3410_2001_TestParamSet;
215 } else if ((strlen(value) == 2)
216 && (toupper((unsigned char)value[0]) == 'X')) {
217 switch (toupper((unsigned char)value[1])) {
219 param_nid = NID_id_GostR3410_2001_CryptoPro_XchA_ParamSet;
222 param_nid = NID_id_GostR3410_2001_CryptoPro_XchB_ParamSet;
228 R3410_2001_params *p = R3410_2001_paramset;
229 param_nid = OBJ_txt2nid(value);
230 if (param_nid == NID_undef) {
233 for (; p->nid != NID_undef; p++) {
234 if (p->nid == param_nid)
237 if (p->nid == NID_undef) {
238 GOSTerr(GOST_F_PKEY_GOST_CTRL01_STR, GOST_R_INVALID_PARAMSET);
243 return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
249 /* --------------------- key generation --------------------------------*/
251 static int pkey_gost_paramgen_init(EVP_PKEY_CTX *ctx)
256 static int pkey_gost94_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
258 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
260 if (data->sign_param_nid == NID_undef) {
261 GOSTerr(GOST_F_PKEY_GOST94_PARAMGEN, GOST_R_NO_PARAMETERS_SET);
265 if (!fill_GOST94_params(dsa, data->sign_param_nid)) {
269 EVP_PKEY_assign(pkey, NID_id_GostR3410_94, dsa);
273 static int pkey_gost01_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
275 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
278 if (data->sign_param_nid == NID_undef) {
279 GOSTerr(GOST_F_PKEY_GOST01_PARAMGEN, GOST_R_NO_PARAMETERS_SET);
284 if (!fill_GOST2001_params(ec, data->sign_param_nid)) {
288 EVP_PKEY_assign(pkey, NID_id_GostR3410_2001, ec);
292 /* Generates Gost_R3410_94_cp key */
293 static int pkey_gost94cp_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
296 if (!pkey_gost94_paramgen(ctx, pkey))
298 dsa = EVP_PKEY_get0(pkey);
299 gost_sign_keygen(dsa);
303 /* Generates GOST_R3410 2001 key and assigns it using specified type */
304 static int pkey_gost01cp_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
307 if (!pkey_gost01_paramgen(ctx, pkey))
309 ec = EVP_PKEY_get0(pkey);
314 /* ----------- sign callbacks --------------------------------------*/
316 static int pkey_gost94_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
317 size_t *siglen, const unsigned char *tbs,
320 DSA_SIG *unpacked_sig = NULL;
321 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
325 *siglen = 64; /* better to check size of pkey->pkey.dsa-q */
328 unpacked_sig = gost_do_sign(tbs, tbs_len, EVP_PKEY_get0(pkey));
332 return pack_sign_cp(unpacked_sig, 32, sig, siglen);
335 static int pkey_gost01_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
336 size_t *siglen, const unsigned char *tbs,
339 DSA_SIG *unpacked_sig = NULL;
340 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
344 *siglen = 64; /* better to check size of curve order */
347 unpacked_sig = gost2001_do_sign(tbs, tbs_len, EVP_PKEY_get0(pkey));
351 return pack_sign_cp(unpacked_sig, 32, sig, siglen);
354 /* ------------------- verify callbacks ---------------------------*/
356 static int pkey_gost94_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
357 size_t siglen, const unsigned char *tbs,
361 EVP_PKEY *pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
362 DSA_SIG *s = unpack_cp_signature(sig, siglen);
366 ok = gost_do_verify(tbs, tbs_len, s, EVP_PKEY_get0(pub_key));
371 static int pkey_gost01_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
372 size_t siglen, const unsigned char *tbs,
376 EVP_PKEY *pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
377 DSA_SIG *s = unpack_cp_signature(sig, siglen);
381 fprintf(stderr, "R=");
382 BN_print_fp(stderr, s->r);
383 fprintf(stderr, "\nS=");
384 BN_print_fp(stderr, s->s);
385 fprintf(stderr, "\n");
388 ok = gost2001_do_verify(tbs, tbs_len, s, EVP_PKEY_get0(pub_key));
393 /* ------------- encrypt init -------------------------------------*/
394 /* Generates ephermeral key */
395 static int pkey_gost_encrypt_init(EVP_PKEY_CTX *ctx)
400 /* --------------- Derive init ------------------------------------*/
401 static int pkey_gost_derive_init(EVP_PKEY_CTX *ctx)
406 /* -------- PKEY_METHOD for GOST MAC algorithm --------------------*/
407 static int pkey_gost_mac_init(EVP_PKEY_CTX *ctx)
409 struct gost_mac_pmeth_data *data;
410 data = OPENSSL_malloc(sizeof(struct gost_mac_pmeth_data));
413 memset(data, 0, sizeof(struct gost_mac_pmeth_data));
414 EVP_PKEY_CTX_set_data(ctx, data);
418 static void pkey_gost_mac_cleanup(EVP_PKEY_CTX *ctx)
420 struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
424 static int pkey_gost_mac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
426 struct gost_mac_pmeth_data *dst_data, *src_data;
427 if (!pkey_gost_mac_init(dst)) {
430 src_data = EVP_PKEY_CTX_get_data(src);
431 dst_data = EVP_PKEY_CTX_get_data(dst);
432 *dst_data = *src_data;
436 static int pkey_gost_mac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
438 struct gost_mac_pmeth_data *data =
439 (struct gost_mac_pmeth_data *)EVP_PKEY_CTX_get_data(ctx);
442 case EVP_PKEY_CTRL_MD:
444 if (EVP_MD_type((const EVP_MD *)p2) != NID_id_Gost28147_89_MAC) {
445 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,
446 GOST_R_INVALID_DIGEST_TYPE);
449 data->md = (EVP_MD *)p2;
453 case EVP_PKEY_CTRL_GET_MD:
454 *(const EVP_MD **)p2 = data->md;
457 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
458 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
459 case EVP_PKEY_CTRL_PKCS7_SIGN:
461 case EVP_PKEY_CTRL_SET_MAC_KEY:
463 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL, GOST_R_INVALID_MAC_KEY_LENGTH);
467 memcpy(data->key, p2, 32);
470 case EVP_PKEY_CTRL_DIGESTINIT:
472 EVP_MD_CTX *mctx = p2;
474 if (!data->key_set) {
475 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
477 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,
478 GOST_R_MAC_KEY_NOT_SET);
481 key = EVP_PKEY_get0(pkey);
483 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,
484 GOST_R_MAC_KEY_NOT_SET);
490 return mctx->digest->md_ctrl(mctx, EVP_MD_CTRL_SET_KEY, 32, key);
496 static int pkey_gost_mac_ctrl_str(EVP_PKEY_CTX *ctx,
497 const char *type, const char *value)
499 if (!strcmp(type, key_ctrl_string)) {
500 if (strlen(value) != 32) {
501 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR,
502 GOST_R_INVALID_MAC_KEY_LENGTH);
505 return pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
508 if (!strcmp(type, hexkey_ctrl_string)) {
511 unsigned char *keybuf = string_to_hex(value, &keylen);
512 if (!keybuf || keylen != 32) {
513 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR,
514 GOST_R_INVALID_MAC_KEY_LENGTH);
515 OPENSSL_free(keybuf);
518 ret = pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, 32, keybuf);
519 OPENSSL_free(keybuf);
526 static int pkey_gost_mac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
528 struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
529 unsigned char *keydata;
530 if (!data->key_set) {
531 GOSTerr(GOST_F_PKEY_GOST_MAC_KEYGEN, GOST_R_MAC_KEY_NOT_SET);
534 keydata = OPENSSL_malloc(32);
537 memcpy(keydata, data->key, 32);
538 EVP_PKEY_assign(pkey, NID_id_Gost28147_89_MAC, keydata);
542 static int pkey_gost_mac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
547 static int pkey_gost_mac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig,
548 size_t *siglen, EVP_MD_CTX *mctx)
550 unsigned int tmpsiglen = *siglen; /* for platforms where
551 * sizeof(int)!=sizeof(size_t) */
557 ret = EVP_DigestFinal_ex(mctx, sig, &tmpsiglen);
562 /* ----------------------------------------------------------------*/
563 int register_pmeth_gost(int id, EVP_PKEY_METHOD **pmeth, int flags)
565 *pmeth = EVP_PKEY_meth_new(id, flags);
570 case NID_id_GostR3410_94:
571 EVP_PKEY_meth_set_ctrl(*pmeth, pkey_gost_ctrl, pkey_gost_ctrl94_str);
572 EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost94cp_keygen);
573 EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost94_cp_sign);
574 EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost94_cp_verify);
575 EVP_PKEY_meth_set_encrypt(*pmeth,
576 pkey_gost_encrypt_init,
577 pkey_GOST94cp_encrypt);
578 EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST94cp_decrypt);
579 EVP_PKEY_meth_set_derive(*pmeth,
580 pkey_gost_derive_init, pkey_gost94_derive);
581 EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init,
582 pkey_gost94_paramgen);
584 case NID_id_GostR3410_2001:
585 EVP_PKEY_meth_set_ctrl(*pmeth, pkey_gost_ctrl, pkey_gost_ctrl01_str);
586 EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost01_cp_sign);
587 EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost01_cp_verify);
589 EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost01cp_keygen);
591 EVP_PKEY_meth_set_encrypt(*pmeth,
592 pkey_gost_encrypt_init,
593 pkey_GOST01cp_encrypt);
594 EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST01cp_decrypt);
595 EVP_PKEY_meth_set_derive(*pmeth,
596 pkey_gost_derive_init, pkey_gost2001_derive);
597 EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init,
598 pkey_gost01_paramgen);
600 case NID_id_Gost28147_89_MAC:
601 EVP_PKEY_meth_set_ctrl(*pmeth, pkey_gost_mac_ctrl,
602 pkey_gost_mac_ctrl_str);
603 EVP_PKEY_meth_set_signctx(*pmeth, pkey_gost_mac_signctx_init,
604 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);
618 * FIXME derive etc...