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);
28 data = OPENSSL_malloc(sizeof(*data));
31 memset(data, 0, sizeof(struct gost_pmeth_data));
32 if (pkey && EVP_PKEY_get0(pkey)) {
33 switch (EVP_PKEY_base_id(pkey)) {
34 case NID_id_GostR3410_94:
35 data->sign_param_nid = gost94_nid_by_params(EVP_PKEY_get0(pkey));
37 case NID_id_GostR3410_2001:
38 data->sign_param_nid =
39 EC_GROUP_get_curve_name(EC_KEY_get0_group
40 (EVP_PKEY_get0((EVP_PKEY *)pkey)));
46 EVP_PKEY_CTX_set_data(ctx, data);
50 /* Copies contents of gost_pmeth_data structure */
51 static int pkey_gost_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
53 struct gost_pmeth_data *dst_data, *src_data;
54 if (!pkey_gost_init(dst)) {
57 src_data = EVP_PKEY_CTX_get_data(src);
58 dst_data = EVP_PKEY_CTX_get_data(dst);
59 *dst_data = *src_data;
60 if (src_data->shared_ukm) {
61 dst_data->shared_ukm = NULL;
66 /* Frees up gost_pmeth_data structure */
67 static void pkey_gost_cleanup(EVP_PKEY_CTX *ctx)
69 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
71 OPENSSL_free(data->shared_ukm);
75 /* --------------------- control functions ------------------------------*/
76 static int pkey_gost_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
78 struct gost_pmeth_data *pctx =
79 (struct gost_pmeth_data *)EVP_PKEY_CTX_get_data(ctx);
81 case EVP_PKEY_CTRL_MD:
83 if (EVP_MD_type((const EVP_MD *)p2) != NID_id_GostR3411_94) {
84 GOSTerr(GOST_F_PKEY_GOST_CTRL, GOST_R_INVALID_DIGEST_TYPE);
87 pctx->md = (EVP_MD *)p2;
91 case EVP_PKEY_CTRL_GET_MD:
92 *(const EVP_MD **)p2 = pctx->md;
95 case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
96 case EVP_PKEY_CTRL_PKCS7_DECRYPT:
97 case EVP_PKEY_CTRL_PKCS7_SIGN:
98 case EVP_PKEY_CTRL_DIGESTINIT:
99 #ifndef OPENSSL_NO_CMS
100 case EVP_PKEY_CTRL_CMS_ENCRYPT:
101 case EVP_PKEY_CTRL_CMS_DECRYPT:
102 case EVP_PKEY_CTRL_CMS_SIGN:
106 case EVP_PKEY_CTRL_GOST_PARAMSET:
107 pctx->sign_param_nid = (int)p1;
109 case EVP_PKEY_CTRL_SET_IV:
110 pctx->shared_ukm = OPENSSL_malloc((int)p1);
111 if (pctx->shared_ukm == NULL) {
112 GOSTerr(GOST_F_PKEY_GOST_CTRL, ERR_R_MALLOC_FAILURE);
115 memcpy(pctx->shared_ukm, p2, (int)p1);
117 case EVP_PKEY_CTRL_PEER_KEY:
118 if (p1 == 0 || p1 == 1) /* call from EVP_PKEY_derive_set_peer */
120 if (p1 == 2) /* TLS: peer key used? */
121 return pctx->peer_key_used;
122 if (p1 == 3) /* TLS: peer key used! */
123 return (pctx->peer_key_used = 1);
129 static int pkey_gost_ctrl94_str(EVP_PKEY_CTX *ctx,
130 const char *type, const char *value)
133 if (!strcmp(type, param_ctrl_string)) {
137 if (strlen(value) == 1) {
138 switch (toupper((unsigned char)value[0])) {
140 param_nid = NID_id_GostR3410_94_CryptoPro_A_ParamSet;
143 param_nid = NID_id_GostR3410_94_CryptoPro_B_ParamSet;
146 param_nid = NID_id_GostR3410_94_CryptoPro_C_ParamSet;
149 param_nid = NID_id_GostR3410_94_CryptoPro_D_ParamSet;
154 } else if ((strlen(value) == 2)
155 && (toupper((unsigned char)value[0]) == 'X')) {
156 switch (toupper((unsigned char)value[1])) {
158 param_nid = NID_id_GostR3410_94_CryptoPro_XchA_ParamSet;
161 param_nid = NID_id_GostR3410_94_CryptoPro_XchB_ParamSet;
164 param_nid = NID_id_GostR3410_94_CryptoPro_XchC_ParamSet;
170 R3410_params *p = R3410_paramset;
171 param_nid = OBJ_txt2nid(value);
172 if (param_nid == NID_undef) {
175 for (; p->nid != NID_undef; p++) {
176 if (p->nid == param_nid)
179 if (p->nid == NID_undef) {
180 GOSTerr(GOST_F_PKEY_GOST_CTRL94_STR, GOST_R_INVALID_PARAMSET);
185 return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
191 static int pkey_gost_ctrl01_str(EVP_PKEY_CTX *ctx,
192 const char *type, const char *value)
195 if (!strcmp(type, param_ctrl_string)) {
199 if (strlen(value) == 1) {
200 switch (toupper((unsigned char)value[0])) {
202 param_nid = NID_id_GostR3410_2001_CryptoPro_A_ParamSet;
205 param_nid = NID_id_GostR3410_2001_CryptoPro_B_ParamSet;
208 param_nid = NID_id_GostR3410_2001_CryptoPro_C_ParamSet;
211 param_nid = NID_id_GostR3410_2001_TestParamSet;
216 } else if ((strlen(value) == 2)
217 && (toupper((unsigned char)value[0]) == 'X')) {
218 switch (toupper((unsigned char)value[1])) {
220 param_nid = NID_id_GostR3410_2001_CryptoPro_XchA_ParamSet;
223 param_nid = NID_id_GostR3410_2001_CryptoPro_XchB_ParamSet;
229 R3410_2001_params *p = R3410_2001_paramset;
230 param_nid = OBJ_txt2nid(value);
231 if (param_nid == NID_undef) {
234 for (; p->nid != NID_undef; p++) {
235 if (p->nid == param_nid)
238 if (p->nid == NID_undef) {
239 GOSTerr(GOST_F_PKEY_GOST_CTRL01_STR, GOST_R_INVALID_PARAMSET);
244 return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
250 /* --------------------- key generation --------------------------------*/
252 static int pkey_gost_paramgen_init(EVP_PKEY_CTX *ctx)
257 static int pkey_gost94_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
259 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
261 if (data->sign_param_nid == NID_undef) {
262 GOSTerr(GOST_F_PKEY_GOST94_PARAMGEN, GOST_R_NO_PARAMETERS_SET);
266 if (!fill_GOST94_params(dsa, data->sign_param_nid)) {
270 EVP_PKEY_assign(pkey, NID_id_GostR3410_94, dsa);
274 static int pkey_gost01_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
276 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
279 if (data->sign_param_nid == NID_undef) {
280 GOSTerr(GOST_F_PKEY_GOST01_PARAMGEN, GOST_R_NO_PARAMETERS_SET);
285 if (!fill_GOST2001_params(ec, data->sign_param_nid)) {
289 EVP_PKEY_assign(pkey, NID_id_GostR3410_2001, ec);
293 /* Generates Gost_R3410_94_cp key */
294 static int pkey_gost94cp_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
297 if (!pkey_gost94_paramgen(ctx, pkey))
299 dsa = EVP_PKEY_get0(pkey);
300 gost_sign_keygen(dsa);
304 /* Generates GOST_R3410 2001 key and assigns it using specified type */
305 static int pkey_gost01cp_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
308 if (!pkey_gost01_paramgen(ctx, pkey))
310 ec = EVP_PKEY_get0(pkey);
315 /* ----------- sign callbacks --------------------------------------*/
317 static int pkey_gost94_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
318 size_t *siglen, const unsigned char *tbs,
321 DSA_SIG *unpacked_sig = NULL;
322 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
326 *siglen = 64; /* better to check size of pkey->pkey.dsa-q */
329 unpacked_sig = gost_do_sign(tbs, tbs_len, EVP_PKEY_get0(pkey));
333 return pack_sign_cp(unpacked_sig, 32, sig, siglen);
336 static int pkey_gost01_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
337 size_t *siglen, const unsigned char *tbs,
340 DSA_SIG *unpacked_sig = NULL;
341 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
345 *siglen = 64; /* better to check size of curve order */
348 unpacked_sig = gost2001_do_sign(tbs, tbs_len, EVP_PKEY_get0(pkey));
352 return pack_sign_cp(unpacked_sig, 32, sig, siglen);
355 /* ------------------- verify callbacks ---------------------------*/
357 static int pkey_gost94_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
358 size_t siglen, const unsigned char *tbs,
362 EVP_PKEY *pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
363 DSA_SIG *s = unpack_cp_signature(sig, siglen);
367 ok = gost_do_verify(tbs, tbs_len, s, EVP_PKEY_get0(pub_key));
372 static int pkey_gost01_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
373 size_t siglen, const unsigned char *tbs,
377 EVP_PKEY *pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
378 DSA_SIG *s = unpack_cp_signature(sig, siglen);
382 fprintf(stderr, "R=");
383 BN_print_fp(stderr, s->r);
384 fprintf(stderr, "\nS=");
385 BN_print_fp(stderr, s->s);
386 fprintf(stderr, "\n");
389 ok = gost2001_do_verify(tbs, tbs_len, s, EVP_PKEY_get0(pub_key));
394 /* ------------- encrypt init -------------------------------------*/
395 /* Generates ephermeral key */
396 static int pkey_gost_encrypt_init(EVP_PKEY_CTX *ctx)
401 /* --------------- Derive init ------------------------------------*/
402 static int pkey_gost_derive_init(EVP_PKEY_CTX *ctx)
407 /* -------- PKEY_METHOD for GOST MAC algorithm --------------------*/
408 static int pkey_gost_mac_init(EVP_PKEY_CTX *ctx)
410 struct gost_mac_pmeth_data *data = OPENSSL_malloc(sizeof(*data));
414 memset(data, 0, sizeof(struct gost_mac_pmeth_data));
415 EVP_PKEY_CTX_set_data(ctx, data);
419 static void pkey_gost_mac_cleanup(EVP_PKEY_CTX *ctx)
421 struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
425 static int pkey_gost_mac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
427 struct gost_mac_pmeth_data *dst_data, *src_data;
428 if (!pkey_gost_mac_init(dst)) {
431 src_data = EVP_PKEY_CTX_get_data(src);
432 dst_data = EVP_PKEY_CTX_get_data(dst);
433 *dst_data = *src_data;
437 static int pkey_gost_mac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
439 struct gost_mac_pmeth_data *data =
440 (struct gost_mac_pmeth_data *)EVP_PKEY_CTX_get_data(ctx);
443 case EVP_PKEY_CTRL_MD:
445 if (EVP_MD_type((const EVP_MD *)p2) != NID_id_Gost28147_89_MAC) {
446 GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,
447 GOST_R_INVALID_DIGEST_TYPE);
450 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);
538 memcpy(keydata, data->key, 32);
539 EVP_PKEY_assign(pkey, NID_id_Gost28147_89_MAC, keydata);
543 static int pkey_gost_mac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
548 static int pkey_gost_mac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig,
549 size_t *siglen, EVP_MD_CTX *mctx)
551 unsigned int tmpsiglen = *siglen; /* for platforms where
552 * sizeof(int)!=sizeof(size_t) */
558 ret = EVP_DigestFinal_ex(mctx, sig, &tmpsiglen);
563 /* ----------------------------------------------------------------*/
564 int register_pmeth_gost(int id, EVP_PKEY_METHOD **pmeth, int flags)
566 *pmeth = EVP_PKEY_meth_new(id, flags);
571 case NID_id_GostR3410_94:
572 EVP_PKEY_meth_set_ctrl(*pmeth, pkey_gost_ctrl, pkey_gost_ctrl94_str);
573 EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost94cp_keygen);
574 EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost94_cp_sign);
575 EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost94_cp_verify);
576 EVP_PKEY_meth_set_encrypt(*pmeth,
577 pkey_gost_encrypt_init,
578 pkey_GOST94cp_encrypt);
579 EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST94cp_decrypt);
580 EVP_PKEY_meth_set_derive(*pmeth,
581 pkey_gost_derive_init, pkey_gost94_derive);
582 EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init,
583 pkey_gost94_paramgen);
585 case NID_id_GostR3410_2001:
586 EVP_PKEY_meth_set_ctrl(*pmeth, pkey_gost_ctrl, pkey_gost_ctrl01_str);
587 EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost01_cp_sign);
588 EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost01_cp_verify);
590 EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost01cp_keygen);
592 EVP_PKEY_meth_set_encrypt(*pmeth,
593 pkey_gost_encrypt_init,
594 pkey_GOST01cp_encrypt);
595 EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST01cp_decrypt);
596 EVP_PKEY_meth_set_derive(*pmeth,
597 pkey_gost_derive_init, pkey_gost2001_derive);
598 EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init,
599 pkey_gost01_paramgen);
601 case NID_id_Gost28147_89_MAC:
602 EVP_PKEY_meth_set_ctrl(*pmeth, pkey_gost_mac_ctrl,
603 pkey_gost_mac_ctrl_str);
604 EVP_PKEY_meth_set_signctx(*pmeth, pkey_gost_mac_signctx_init,
605 pkey_gost_mac_signctx);
606 EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost_mac_keygen);
607 EVP_PKEY_meth_set_init(*pmeth, pkey_gost_mac_init);
608 EVP_PKEY_meth_set_cleanup(*pmeth, pkey_gost_mac_cleanup);
609 EVP_PKEY_meth_set_copy(*pmeth, pkey_gost_mac_copy);
611 default: /* Unsupported method */
614 EVP_PKEY_meth_set_init(*pmeth, pkey_gost_init);
615 EVP_PKEY_meth_set_cleanup(*pmeth, pkey_gost_cleanup);
617 EVP_PKEY_meth_set_copy(*pmeth, pkey_gost_copy);
619 * FIXME derive etc...