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));
29 memset(data, 0, sizeof(struct gost_pmeth_data));
30 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 =
37 EC_GROUP_get_curve_name(EC_KEY_get0_group
38 (EVP_PKEY_get0((EVP_PKEY *)pkey)));
44 EVP_PKEY_CTX_set_data(ctx, data);
48 /* Copies contents of gost_pmeth_data structure */
49 static int pkey_gost_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
51 struct gost_pmeth_data *dst_data, *src_data;
52 if (!pkey_gost_init(dst)) {
55 src_data = EVP_PKEY_CTX_get_data(src);
56 dst_data = EVP_PKEY_CTX_get_data(dst);
57 *dst_data = *src_data;
58 if (src_data->shared_ukm) {
59 dst_data->shared_ukm = NULL;
64 /* Frees up gost_pmeth_data structure */
65 static void pkey_gost_cleanup(EVP_PKEY_CTX *ctx)
67 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
69 OPENSSL_free(data->shared_ukm);
73 /* --------------------- control functions ------------------------------*/
74 static int pkey_gost_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
76 struct gost_pmeth_data *pctx =
77 (struct gost_pmeth_data *)EVP_PKEY_CTX_get_data(ctx);
79 case EVP_PKEY_CTRL_MD:
81 if (EVP_MD_type((const EVP_MD *)p2) != NID_id_GostR3411_94) {
82 GOSTerr(GOST_F_PKEY_GOST_CTRL, GOST_R_INVALID_DIGEST_TYPE);
85 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 memcpy(pctx->shared_ukm, p2, (int)p1);
112 case EVP_PKEY_CTRL_PEER_KEY:
113 if (p1 == 0 || p1 == 1) /* call from EVP_PKEY_derive_set_peer */
115 if (p1 == 2) /* TLS: peer key used? */
116 return pctx->peer_key_used;
117 if (p1 == 3) /* TLS: peer key used! */
118 return (pctx->peer_key_used = 1);
124 static int pkey_gost_ctrl94_str(EVP_PKEY_CTX *ctx,
125 const char *type, const char *value)
128 if (!strcmp(type, param_ctrl_string)) {
132 if (strlen(value) == 1) {
133 switch (toupper((unsigned char)value[0])) {
135 param_nid = NID_id_GostR3410_94_CryptoPro_A_ParamSet;
138 param_nid = NID_id_GostR3410_94_CryptoPro_B_ParamSet;
141 param_nid = NID_id_GostR3410_94_CryptoPro_C_ParamSet;
144 param_nid = NID_id_GostR3410_94_CryptoPro_D_ParamSet;
150 } else if ((strlen(value) == 2)
151 && (toupper((unsigned char)value[0]) == 'X')) {
152 switch (toupper((unsigned char)value[1])) {
154 param_nid = NID_id_GostR3410_94_CryptoPro_XchA_ParamSet;
157 param_nid = NID_id_GostR3410_94_CryptoPro_XchB_ParamSet;
160 param_nid = NID_id_GostR3410_94_CryptoPro_XchC_ParamSet;
167 R3410_params *p = R3410_paramset;
168 param_nid = OBJ_txt2nid(value);
169 if (param_nid == NID_undef) {
172 for (; p->nid != NID_undef; p++) {
173 if (p->nid == param_nid)
176 if (p->nid == NID_undef) {
177 GOSTerr(GOST_F_PKEY_GOST_CTRL94_STR, GOST_R_INVALID_PARAMSET);
182 return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
188 static int pkey_gost_ctrl01_str(EVP_PKEY_CTX *ctx,
189 const char *type, const char *value)
192 if (!strcmp(type, param_ctrl_string)) {
196 if (strlen(value) == 1) {
197 switch (toupper((unsigned char)value[0])) {
199 param_nid = NID_id_GostR3410_2001_CryptoPro_A_ParamSet;
202 param_nid = NID_id_GostR3410_2001_CryptoPro_B_ParamSet;
205 param_nid = NID_id_GostR3410_2001_CryptoPro_C_ParamSet;
208 param_nid = NID_id_GostR3410_2001_TestParamSet;
214 } else if ((strlen(value) == 2)
215 && (toupper((unsigned char)value[0]) == 'X')) {
216 switch (toupper((unsigned char)value[1])) {
218 param_nid = NID_id_GostR3410_2001_CryptoPro_XchA_ParamSet;
221 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;
454 case EVP_PKEY_CTRL_GET_MD:
455 *(const EVP_MD **)p2 = data->md;
458 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
459 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
460 case EVP_PKEY_CTRL_PKCS7_SIGN:
462 case EVP_PKEY_CTRL_SET_MAC_KEY:
464 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL, GOST_R_INVALID_MAC_KEY_LENGTH);
468 memcpy(data->key, p2, 32);
471 case EVP_PKEY_CTRL_DIGESTINIT:
473 EVP_MD_CTX *mctx = p2;
475 if (!data->key_set) {
476 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
478 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,
479 GOST_R_MAC_KEY_NOT_SET);
482 key = EVP_PKEY_get0(pkey);
484 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,
485 GOST_R_MAC_KEY_NOT_SET);
491 return mctx->digest->md_ctrl(mctx, EVP_MD_CTRL_SET_KEY, 32, key);
497 static int pkey_gost_mac_ctrl_str(EVP_PKEY_CTX *ctx,
498 const char *type, const char *value)
500 if (!strcmp(type, key_ctrl_string)) {
501 if (strlen(value) != 32) {
502 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR,
503 GOST_R_INVALID_MAC_KEY_LENGTH);
506 return pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
509 if (!strcmp(type, hexkey_ctrl_string)) {
512 unsigned char *keybuf = string_to_hex(value, &keylen);
513 if (!keybuf || keylen != 32) {
514 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR,
515 GOST_R_INVALID_MAC_KEY_LENGTH);
516 OPENSSL_free(keybuf);
519 ret = pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, 32, keybuf);
520 OPENSSL_free(keybuf);
527 static int pkey_gost_mac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
529 struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
530 unsigned char *keydata;
531 if (!data->key_set) {
532 GOSTerr(GOST_F_PKEY_GOST_MAC_KEYGEN, GOST_R_MAC_KEY_NOT_SET);
535 keydata = OPENSSL_malloc(32);
536 memcpy(keydata, data->key, 32);
537 EVP_PKEY_assign(pkey, NID_id_Gost28147_89_MAC, keydata);
541 static int pkey_gost_mac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
546 static int pkey_gost_mac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig,
547 size_t *siglen, EVP_MD_CTX *mctx)
549 unsigned int tmpsiglen = *siglen; /* for platforms where
550 * sizeof(int)!=sizeof(size_t) */
556 ret = EVP_DigestFinal_ex(mctx, sig, &tmpsiglen);
561 /* ----------------------------------------------------------------*/
562 int register_pmeth_gost(int id, EVP_PKEY_METHOD **pmeth, int flags)
564 *pmeth = EVP_PKEY_meth_new(id, flags);
569 case NID_id_GostR3410_94:
570 EVP_PKEY_meth_set_ctrl(*pmeth, pkey_gost_ctrl, pkey_gost_ctrl94_str);
571 EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost94cp_keygen);
572 EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost94_cp_sign);
573 EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost94_cp_verify);
574 EVP_PKEY_meth_set_encrypt(*pmeth,
575 pkey_gost_encrypt_init,
576 pkey_GOST94cp_encrypt);
577 EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST94cp_decrypt);
578 EVP_PKEY_meth_set_derive(*pmeth,
579 pkey_gost_derive_init, pkey_gost94_derive);
580 EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init,
581 pkey_gost94_paramgen);
583 case NID_id_GostR3410_2001:
584 EVP_PKEY_meth_set_ctrl(*pmeth, pkey_gost_ctrl, pkey_gost_ctrl01_str);
585 EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost01_cp_sign);
586 EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost01_cp_verify);
588 EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost01cp_keygen);
590 EVP_PKEY_meth_set_encrypt(*pmeth,
591 pkey_gost_encrypt_init,
592 pkey_GOST01cp_encrypt);
593 EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST01cp_decrypt);
594 EVP_PKEY_meth_set_derive(*pmeth,
595 pkey_gost_derive_init, pkey_gost2001_derive);
596 EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init,
597 pkey_gost01_paramgen);
599 case NID_id_Gost28147_89_MAC:
600 EVP_PKEY_meth_set_ctrl(*pmeth, pkey_gost_mac_ctrl,
601 pkey_gost_mac_ctrl_str);
602 EVP_PKEY_meth_set_signctx(*pmeth, pkey_gost_mac_signctx_init,
603 pkey_gost_mac_signctx);
604 EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost_mac_keygen);
605 EVP_PKEY_meth_set_init(*pmeth, pkey_gost_mac_init);
606 EVP_PKEY_meth_set_cleanup(*pmeth, pkey_gost_mac_cleanup);
607 EVP_PKEY_meth_set_copy(*pmeth, pkey_gost_mac_copy);
609 default: /* Unsupported method */
612 EVP_PKEY_meth_set_init(*pmeth, pkey_gost_init);
613 EVP_PKEY_meth_set_cleanup(*pmeth, pkey_gost_cleanup);
615 EVP_PKEY_meth_set_copy(*pmeth, pkey_gost_copy);
617 * FIXME derive etc...