1 /**********************************************************************
2 * gost_crypt.c - Initialize all ciphers *
4 * Copyright (c) 2005-2006 Cryptocom LTD *
5 * Copyright (c) 2020 Chikunov Vitaly <vt@altlinux.org> *
6 * This file is distributed under the same license as OpenSSL *
8 * OpenSSL interface to GOST 28147-89 cipher functions *
9 * Requires OpenSSL 0.9.9 for compilation *
10 **********************************************************************/
13 #include <openssl/err.h>
14 #include <openssl/rand.h>
15 #include "e_gost_err.h"
17 #include "gost_gost2015.h"
19 #if !defined(CCGOST_DEBUG) && !defined(DEBUG)
26 static int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
27 const unsigned char *iv, int enc);
28 static int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
29 const unsigned char *iv, int enc);
30 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
31 const unsigned char *iv, int enc);
32 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
33 const unsigned char *key,
34 const unsigned char *iv, int enc);
35 /* Handles block of data in CFB mode */
36 static int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
37 const unsigned char *in, size_t inl);
38 /* Handles block of data in CBC mode */
39 static int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
40 const unsigned char *in, size_t inl);
41 /* Handles block of data in CNT mode */
42 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
43 const unsigned char *in, size_t inl);
44 /* Cleanup function */
45 static int gost_cipher_cleanup(EVP_CIPHER_CTX *);
46 /* set/get cipher parameters */
47 static int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
48 static int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
49 /* Control function */
50 static int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
52 static int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
53 const unsigned char *iv, int enc);
54 static int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
55 const unsigned char *iv, int enc);
56 /* Handles block of data in CBC mode */
57 static int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
58 const unsigned char *in, size_t inl);
59 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
60 const unsigned char *in, size_t inl);
62 static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
63 const unsigned char *in, size_t inl);
65 /* set/get cipher parameters */
66 static int magma_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
67 static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
68 /* Control function */
69 static int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
70 static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
72 EVP_CIPHER *GOST_init_cipher(GOST_cipher *c)
78 if (!(cipher = EVP_CIPHER_meth_new(c->nid, c->block_size, c->key_len))
79 || !EVP_CIPHER_meth_set_iv_length(cipher, c->iv_len)
80 || !EVP_CIPHER_meth_set_flags(cipher, c->flags)
81 || !EVP_CIPHER_meth_set_init(cipher, c->init)
82 || !EVP_CIPHER_meth_set_do_cipher(cipher, c->do_cipher)
83 || !EVP_CIPHER_meth_set_cleanup(cipher, c->cleanup)
84 || !EVP_CIPHER_meth_set_impl_ctx_size(cipher, c->ctx_size)
85 || !EVP_CIPHER_meth_set_set_asn1_params(cipher, c->set_asn1_parameters)
86 || !EVP_CIPHER_meth_set_get_asn1_params(cipher, c->get_asn1_parameters)
87 || !EVP_CIPHER_meth_set_ctrl(cipher, c->ctrl)) {
88 EVP_CIPHER_meth_free(cipher);
95 void GOST_deinit_cipher(GOST_cipher *c)
98 EVP_CIPHER_meth_free(c->cipher);
103 GOST_cipher Gost28147_89_cipher = {
104 .nid = NID_id_Gost28147_89,
108 .flags = EVP_CIPH_CFB_MODE |
109 EVP_CIPH_NO_PADDING |
112 EVP_CIPH_ALWAYS_CALL_INIT,
113 .init = gost_cipher_init,
114 .do_cipher = gost_cipher_do_cfb,
115 .cleanup = gost_cipher_cleanup,
116 .ctx_size = sizeof(struct ossl_gost_cipher_ctx),
117 .set_asn1_parameters = gost89_set_asn1_parameters,
118 .get_asn1_parameters = gost89_get_asn1_parameters,
119 .ctrl = gost_cipher_ctl,
122 GOST_cipher Gost28147_89_cbc_cipher = {
123 .nid = NID_gost89_cbc,
127 .flags = EVP_CIPH_CBC_MODE |
130 EVP_CIPH_ALWAYS_CALL_INIT,
131 .init = gost_cipher_init_cbc,
132 .do_cipher = gost_cipher_do_cbc,
133 .cleanup = gost_cipher_cleanup,
134 .ctx_size = sizeof(struct ossl_gost_cipher_ctx),
135 .set_asn1_parameters = gost89_set_asn1_parameters,
136 .get_asn1_parameters = gost89_get_asn1_parameters,
137 .ctrl = gost_cipher_ctl,
140 GOST_cipher Gost28147_89_cnt_cipher = {
141 .nid = NID_gost89_cnt,
145 .flags = EVP_CIPH_OFB_MODE |
146 EVP_CIPH_NO_PADDING |
149 EVP_CIPH_ALWAYS_CALL_INIT,
150 .init = gost_cipher_init_cpa,
151 .do_cipher = gost_cipher_do_cnt,
152 .cleanup = gost_cipher_cleanup,
153 .ctx_size = sizeof(struct ossl_gost_cipher_ctx),
154 .set_asn1_parameters = gost89_set_asn1_parameters,
155 .get_asn1_parameters = gost89_get_asn1_parameters,
156 .ctrl = gost_cipher_ctl,
159 GOST_cipher Gost28147_89_cnt_12_cipher = {
160 .nid = NID_gost89_cnt_12,
164 .flags = EVP_CIPH_OFB_MODE |
165 EVP_CIPH_NO_PADDING |
168 EVP_CIPH_ALWAYS_CALL_INIT,
169 .init = gost_cipher_init_cp_12,
170 .do_cipher = gost_cipher_do_cnt,
171 .cleanup = gost_cipher_cleanup,
172 .ctx_size = sizeof(struct ossl_gost_cipher_ctx),
173 .set_asn1_parameters = gost89_set_asn1_parameters,
174 .get_asn1_parameters = gost89_get_asn1_parameters,
175 .ctrl = gost_cipher_ctl,
178 GOST_cipher magma_ctr_cipher = {
179 .nid = NID_magma_ctr,
183 .flags = EVP_CIPH_CTR_MODE |
184 EVP_CIPH_NO_PADDING |
187 EVP_CIPH_ALWAYS_CALL_INIT,
188 .init = magma_cipher_init,
189 .do_cipher = magma_cipher_do_ctr,
190 .cleanup = gost_cipher_cleanup,
191 .ctx_size = sizeof(struct ossl_gost_cipher_ctx),
192 .set_asn1_parameters = gost89_set_asn1_parameters,
193 .get_asn1_parameters = gost89_get_asn1_parameters,
194 .ctrl = magma_cipher_ctl,
197 GOST_cipher magma_ctr_acpkm_cipher = {
198 .nid = NID_magma_ctr_acpkm,
202 .flags = EVP_CIPH_CTR_MODE |
203 EVP_CIPH_NO_PADDING |
206 EVP_CIPH_ALWAYS_CALL_INIT,
207 .init = magma_cipher_init,
208 .do_cipher = magma_cipher_do_ctr,
209 .cleanup = gost_cipher_cleanup,
210 .ctx_size = sizeof(struct ossl_gost_cipher_ctx),
211 .set_asn1_parameters = gost89_set_asn1_parameters,
212 .get_asn1_parameters = gost89_get_asn1_parameters,
213 .ctrl = magma_cipher_ctl,
216 GOST_cipher magma_ctr_acpkm_omac_cipher = {
217 .nid = NID_magma_ctr_acpkm_omac,
221 .flags = EVP_CIPH_CTR_MODE |
222 EVP_CIPH_NO_PADDING |
225 EVP_CIPH_ALWAYS_CALL_INIT |
226 EVP_CIPH_CUSTOM_COPY |
227 EVP_CIPH_FLAG_CUSTOM_CIPHER |
228 EVP_CIPH_FLAG_CIPHER_WITH_MAC,
229 .init = magma_cipher_init_ctr_acpkm_omac,
230 .do_cipher = magma_cipher_do_ctr_acpkm_omac,
231 .cleanup = gost_cipher_cleanup,
232 .ctx_size = sizeof(struct ossl_gost_cipher_ctx),
233 .set_asn1_parameters = gost89_set_asn1_parameters,
234 .get_asn1_parameters = gost89_get_asn1_parameters,
235 .ctrl = magma_cipher_ctl_acpkm_omac,
238 static EVP_CIPHER *_hidden_magma_cbc = NULL;
239 const EVP_CIPHER *cipher_magma_cbc(void)
241 if (_hidden_magma_cbc == NULL
242 && ((_hidden_magma_cbc =
243 EVP_CIPHER_meth_new(NID_magma_cbc, 8 /* block_size */ ,
244 32 /* key_size */ )) == NULL
245 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_cbc, 8)
246 || !EVP_CIPHER_meth_set_flags(_hidden_magma_cbc,
250 EVP_CIPH_ALWAYS_CALL_INIT)
251 || !EVP_CIPHER_meth_set_init(_hidden_magma_cbc, magma_cipher_init)
252 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_cbc,
254 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_cbc,
256 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_cbc,
258 ossl_gost_cipher_ctx))
259 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_cbc, magma_cipher_ctl))) {
260 EVP_CIPHER_meth_free(_hidden_magma_cbc);
261 _hidden_magma_cbc = NULL;
263 return _hidden_magma_cbc;
266 /* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */
267 /* Init functions which set specific parameters */
268 static int gost_imit_init_cpa(EVP_MD_CTX *ctx);
269 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx);
270 /* process block of data */
271 static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count);
272 /* Return computed value */
273 static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md);
275 static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
276 static int gost_imit_cleanup(EVP_MD_CTX *ctx);
277 /* Control function, knows how to set MAC key.*/
278 static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr);
280 static EVP_MD *_hidden_Gost28147_89_MAC_md = NULL;
281 static EVP_MD *_hidden_Gost28147_89_12_MAC_md = NULL;
283 EVP_MD *imit_gost_cpa(void)
285 if (_hidden_Gost28147_89_MAC_md == NULL) {
288 if ((md = EVP_MD_meth_new(NID_id_Gost28147_89_MAC, NID_undef)) == NULL
289 || !EVP_MD_meth_set_result_size(md, 4)
290 || !EVP_MD_meth_set_input_blocksize(md, 8)
291 || !EVP_MD_meth_set_app_datasize(md,
292 sizeof(struct ossl_gost_imit_ctx))
293 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
294 || !EVP_MD_meth_set_init(md, gost_imit_init_cpa)
295 || !EVP_MD_meth_set_update(md, gost_imit_update)
296 || !EVP_MD_meth_set_final(md, gost_imit_final)
297 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
298 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
299 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
300 EVP_MD_meth_free(md);
303 _hidden_Gost28147_89_MAC_md = md;
305 return _hidden_Gost28147_89_MAC_md;
308 void imit_gost_cpa_destroy(void)
310 EVP_MD_meth_free(_hidden_Gost28147_89_MAC_md);
311 _hidden_Gost28147_89_MAC_md = NULL;
314 EVP_MD *imit_gost_cp_12(void)
316 if (_hidden_Gost28147_89_12_MAC_md == NULL) {
319 if ((md = EVP_MD_meth_new(NID_gost_mac_12, NID_undef)) == NULL
320 || !EVP_MD_meth_set_result_size(md, 4)
321 || !EVP_MD_meth_set_input_blocksize(md, 8)
322 || !EVP_MD_meth_set_app_datasize(md,
323 sizeof(struct ossl_gost_imit_ctx))
324 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
325 || !EVP_MD_meth_set_init(md, gost_imit_init_cp_12)
326 || !EVP_MD_meth_set_update(md, gost_imit_update)
327 || !EVP_MD_meth_set_final(md, gost_imit_final)
328 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
329 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
330 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
331 EVP_MD_meth_free(md);
334 _hidden_Gost28147_89_12_MAC_md = md;
336 return _hidden_Gost28147_89_12_MAC_md;
339 void imit_gost_cp_12_destroy(void)
341 EVP_MD_meth_free(_hidden_Gost28147_89_12_MAC_md);
342 _hidden_Gost28147_89_12_MAC_md = NULL;
346 * Correspondence between gost parameter OIDs and substitution blocks
347 * NID field is filed by register_gost_NID function in engine.c
348 * upon engine initialization
351 struct gost_cipher_info gost_cipher_list[] = {
358 * {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
360 {NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
362 {NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
364 {NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
366 {NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
368 {NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
369 {NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
374 * get encryption parameters from crypto network settings FIXME For now we
375 * use environment var CRYPT_PARAMS as place to store these settings.
376 * Actually, it is better to use engine control command, read from
377 * configuration file to set them
379 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
382 struct gost_cipher_info *param;
384 const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
385 if (!params || !strlen(params)) {
387 for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
388 if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
389 return &gost_cipher_list[i];
390 return &gost_cipher_list[0];
393 nid = OBJ_txt2nid(params);
394 if (nid == NID_undef) {
395 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
396 GOST_R_INVALID_CIPHER_PARAM_OID);
397 ERR_add_error_data(3, "Unsupported CRYPT_PARAMS='",
398 params, "' specified in environment or in config");
402 nid = OBJ_obj2nid(obj);
404 for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
406 if (!param->sblock) {
407 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
413 /* Sets cipher param from paramset NID. */
414 static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
416 const struct gost_cipher_info *param;
417 param = get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
421 c->paramNID = param->nid;
422 c->key_meshing = param->key_meshing;
424 gost_init(&(c->cctx), param->sblock);
428 /* Initializes EVP_CIPHER_CTX by paramset NID */
429 static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
430 const unsigned char *key,
431 const unsigned char *iv, int enc,
432 int paramNID, int mode)
434 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
435 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
436 if (!gost_cipher_set_param(c, paramNID))
438 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
441 gost_key(&(c->cctx), key);
443 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
444 EVP_CIPHER_CTX_iv_length(ctx));
446 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
447 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
451 static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
452 const unsigned char *key,
453 const unsigned char *iv,
454 gost_subst_block * block)
456 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
457 gost_init(&(c->cctx), block);
461 gost_key(&(c->cctx), key);
463 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
464 EVP_CIPHER_CTX_iv_length(ctx));
466 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
467 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
471 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
472 const unsigned char *iv, int enc)
474 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
477 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
478 const unsigned char *key,
479 const unsigned char *iv, int enc)
481 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
484 /* Initializes EVP_CIPHER_CTX with default values */
485 int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
486 const unsigned char *iv, int enc)
488 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
492 /* Initializes EVP_CIPHER_CTX with default values */
493 int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
494 const unsigned char *iv, int enc)
496 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
500 /* Initializes EVP_CIPHER_CTX with default values */
501 int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
502 const unsigned char *iv, int enc)
504 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
505 /* FIXME this is just initializtion check */
506 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
507 if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
509 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
512 if (init_zero_kdf_seed(c->kdf_seed) == 0)
518 magma_key(&(c->cctx), key);
520 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
521 EVP_CIPHER_CTX_iv_length(ctx));
523 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
524 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
526 if (EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm
527 || EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm_omac) {
528 c->key_meshing = 1024;
536 /* Initializes EVP_CIPHER_CTX with default values */
537 int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
538 const unsigned char *iv, int enc)
541 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
542 unsigned char cipher_key[32];
543 c->omac_ctx = EVP_MD_CTX_new();
545 if (c->omac_ctx == NULL) {
546 GOSTerr(GOST_F_MAGMA_CIPHER_INIT_CTR_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
550 if (gost2015_acpkm_omac_init(NID_magma_mac, enc, key,
551 c->omac_ctx, cipher_key, c->kdf_seed) != 1) {
552 EVP_MD_CTX_free(c->omac_ctx);
557 return magma_cipher_init(ctx, cipher_key, iv, enc);
560 return magma_cipher_init(ctx, key, iv, enc);
564 * Wrapper around gostcrypt function from gost89.c which perform key meshing
567 static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
569 struct ossl_gost_cipher_ctx *c = ctx;
570 assert(c->count % 8 == 0 && c->count <= 1024);
571 if (c->key_meshing && c->count == 1024) {
572 cryptopro_key_meshing(&(c->cctx), iv);
574 gostcrypt(&(c->cctx), iv, buf);
575 c->count = c->count % 1024 + 8;
578 static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
580 struct ossl_gost_cipher_ctx *c = ctx;
582 unsigned char buf1[8];
583 assert(c->count % 8 == 0 && c->count <= 1024);
584 if (c->key_meshing && c->count == 1024) {
585 cryptopro_key_meshing(&(c->cctx), iv);
588 gostcrypt(&(c->cctx), iv, buf1);
592 g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
594 buf1[0] = (unsigned char)(g & 0xff);
595 buf1[1] = (unsigned char)((g >> 8) & 0xff);
596 buf1[2] = (unsigned char)((g >> 16) & 0xff);
597 buf1[3] = (unsigned char)((g >> 24) & 0xff);
598 g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
601 if (go > g) /* overflow */
603 buf1[4] = (unsigned char)(g & 0xff);
604 buf1[5] = (unsigned char)((g >> 8) & 0xff);
605 buf1[6] = (unsigned char)((g >> 16) & 0xff);
606 buf1[7] = (unsigned char)((g >> 24) & 0xff);
608 gostcrypt(&(c->cctx), buf1, buf);
609 c->count = c->count % 1024 + 8;
612 /* GOST encryption in CBC mode */
613 int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
614 const unsigned char *in, size_t inl)
617 const unsigned char *in_ptr = in;
618 unsigned char *out_ptr = out;
620 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
621 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
622 if (EVP_CIPHER_CTX_encrypting(ctx)) {
625 for (i = 0; i < 8; i++) {
626 b[i] = iv[i] ^ in_ptr[i];
628 gostcrypt(&(c->cctx), b, out_ptr);
629 memcpy(iv, out_ptr, 8);
636 gostdecrypt(&(c->cctx), in_ptr, b);
637 for (i = 0; i < 8; i++) {
638 out_ptr[i] = iv[i] ^ b[i];
640 memcpy(iv, in_ptr, 8);
649 /* MAGMA encryption in CBC mode */
650 int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
651 const unsigned char *in, size_t inl)
655 const unsigned char *in_ptr = in;
656 unsigned char *out_ptr = out;
658 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
659 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
660 if (EVP_CIPHER_CTX_encrypting(ctx)) {
663 for (i = 0; i < 8; i++) {
664 b[7 - i] = iv[i] ^ in_ptr[i];
666 gostcrypt(&(c->cctx), b, d);
668 for (i = 0; i < 8; i++) {
669 out_ptr[7 - i] = d[i];
671 memcpy(iv, out_ptr, 8);
678 for (i = 0; i < 8; i++) {
679 d[7 - i] = in_ptr[i];
681 gostdecrypt(&(c->cctx), d, b);
682 memcpy(d, in_ptr, 8);
683 for (i = 0; i < 8; i++) {
684 out_ptr[i] = iv[i] ^ b[7 - i];
695 /* increment counter (64-bit int) by 1 */
696 static void ctr64_inc(unsigned char *counter)
698 inc_counter(counter, 8);
701 /* MAGMA encryption in CTR mode */
702 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
703 const unsigned char *in, size_t inl)
705 const unsigned char *in_ptr = in;
706 unsigned char *out_ptr = out;
709 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
710 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
711 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
713 /* Process partial blocks */
714 if (EVP_CIPHER_CTX_num(ctx)) {
715 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
716 j++, i++, in_ptr++, out_ptr++) {
717 *out_ptr = buf[7 - j] ^ (*in_ptr);
720 EVP_CIPHER_CTX_set_num(ctx, 0);
722 EVP_CIPHER_CTX_set_num(ctx, j);
727 /* Process full blocks */
728 for (; i + 8 <= inl; i += 8, in_ptr += 8, out_ptr += 8) {
729 for (j = 0; j < 8; j++) {
732 gostcrypt(&(c->cctx), b, buf);
733 for (j = 0; j < 8; j++) {
734 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
738 if (c->key_meshing && (c->count % c->key_meshing == 0))
739 acpkm_magma_key_meshing(&(c->cctx));
742 /* Process the rest of plaintext */
744 for (j = 0; j < 8; j++) {
747 gostcrypt(&(c->cctx), b, buf);
749 for (j = 0; i < inl; j++, i++) {
750 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
755 if (c->key_meshing && (c->count % c->key_meshing == 0))
756 acpkm_magma_key_meshing(&(c->cctx));
758 EVP_CIPHER_CTX_set_num(ctx, j);
760 EVP_CIPHER_CTX_set_num(ctx, 0);
766 /* MAGMA encryption in CTR mode */
767 static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
768 const unsigned char *in, size_t inl)
770 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
772 if (in == NULL && inl == 0) /* Final call */
773 return gost2015_final_call(ctx, c->omac_ctx, MAGMA_MAC_MAX_SIZE, c->tag, magma_cipher_do_ctr);
778 /* As in and out can be the same pointer, process unencrypted here */
779 if (EVP_CIPHER_CTX_encrypting(ctx))
780 EVP_DigestSignUpdate(c->omac_ctx, in, inl);
782 if (magma_cipher_do_ctr(ctx, out, in, inl) != inl)
785 /* As in and out can be the same pointer, process decrypted here */
786 if (!EVP_CIPHER_CTX_encrypting(ctx))
787 EVP_DigestSignUpdate(c->omac_ctx, out, inl);
791 /* GOST encryption in CFB mode */
792 int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
793 const unsigned char *in, size_t inl)
795 const unsigned char *in_ptr = in;
796 unsigned char *out_ptr = out;
799 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
800 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
801 /* process partial block if any */
802 if (EVP_CIPHER_CTX_num(ctx)) {
803 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
804 j++, i++, in_ptr++, out_ptr++) {
805 if (!EVP_CIPHER_CTX_encrypting(ctx))
806 buf[j + 8] = *in_ptr;
807 *out_ptr = buf[j] ^ (*in_ptr);
808 if (EVP_CIPHER_CTX_encrypting(ctx))
809 buf[j + 8] = *out_ptr;
812 memcpy(iv, buf + 8, 8);
813 EVP_CIPHER_CTX_set_num(ctx, 0);
815 EVP_CIPHER_CTX_set_num(ctx, j);
820 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
822 * block cipher current iv
824 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
826 * xor next block of input text with it and output it
831 if (!EVP_CIPHER_CTX_encrypting(ctx))
832 memcpy(iv, in_ptr, 8);
833 for (j = 0; j < 8; j++) {
834 out_ptr[j] = buf[j] ^ in_ptr[j];
837 /* Next iv is next block of cipher text */
838 if (EVP_CIPHER_CTX_encrypting(ctx))
839 memcpy(iv, out_ptr, 8);
841 /* Process rest of buffer */
843 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
844 if (!EVP_CIPHER_CTX_encrypting(ctx))
845 memcpy(buf + 8, in_ptr, inl - i);
846 for (j = 0; i < inl; j++, i++) {
847 out_ptr[j] = buf[j] ^ in_ptr[j];
849 EVP_CIPHER_CTX_set_num(ctx, j);
850 if (EVP_CIPHER_CTX_encrypting(ctx))
851 memcpy(buf + 8, out_ptr, j);
853 EVP_CIPHER_CTX_set_num(ctx, 0);
858 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
859 const unsigned char *in, size_t inl)
861 const unsigned char *in_ptr = in;
862 unsigned char *out_ptr = out;
865 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
866 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
867 /* process partial block if any */
868 if (EVP_CIPHER_CTX_num(ctx)) {
869 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
870 j++, i++, in_ptr++, out_ptr++) {
871 *out_ptr = buf[j] ^ (*in_ptr);
874 EVP_CIPHER_CTX_set_num(ctx, 0);
876 EVP_CIPHER_CTX_set_num(ctx, j);
881 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
883 * block cipher current iv
886 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
888 * xor next block of input text with it and output it
893 for (j = 0; j < 8; j++) {
894 out_ptr[j] = buf[j] ^ in_ptr[j];
897 /* Process rest of buffer */
899 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
900 for (j = 0; i < inl; j++, i++) {
901 out_ptr[j] = buf[j] ^ in_ptr[j];
903 EVP_CIPHER_CTX_set_num(ctx, j);
905 EVP_CIPHER_CTX_set_num(ctx, 0);
910 /* Cleaning up of EVP_CIPHER_CTX */
911 int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
913 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
914 EVP_MD_CTX_free(c->omac_ctx);
915 gost_destroy(&(c->cctx));
916 EVP_CIPHER_CTX_set_app_data(ctx, NULL);
920 /* Control function for gost cipher */
921 int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
924 case EVP_CTRL_RAND_KEY:
927 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
928 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
933 case EVP_CTRL_PBE_PRF_NID:
935 const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
936 int nid = NID_id_tc26_hmac_gost_3411_2012_512;
939 if (!strcmp("md_gost12_256", params))
940 nid = NID_id_tc26_hmac_gost_3411_2012_256;
941 else if (!strcmp("md_gost12_512", params))
942 nid = NID_id_tc26_hmac_gost_3411_2012_512;
943 else if (!strcmp("md_gost94", params))
944 nid = NID_id_HMACGostR3411_94;
952 case EVP_CTRL_SET_SBOX:
954 struct ossl_gost_cipher_ctx *c =
955 EVP_CIPHER_CTX_get_cipher_data(ctx);
968 nid = OBJ_txt2nid(ptr);
969 if (nid == NID_undef) {
973 cur_meshing = c->key_meshing;
974 ret = gost_cipher_set_param(c, nid);
975 c->key_meshing = cur_meshing;
980 case EVP_CTRL_KEY_MESH:
982 struct ossl_gost_cipher_ctx *c =
983 EVP_CIPHER_CTX_get_cipher_data(ctx);
993 c->key_meshing = arg;
997 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1003 /* Control function for gost cipher */
1004 int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1007 case EVP_CTRL_RAND_KEY:
1009 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
1010 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
1014 case EVP_CTRL_KEY_MESH:
1016 struct ossl_gost_cipher_ctx *c =
1017 EVP_CIPHER_CTX_get_cipher_data(ctx);
1023 if (c->count != 0) {
1027 c->key_meshing = arg;
1031 GOSTerr(GOST_F_MAGMA_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1037 static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1041 case EVP_CTRL_PROCESS_UNPROTECTED:
1043 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1044 STACK_OF(X509_ATTRIBUTE) *x = ptr;
1045 return gost2015_process_unprotected_attributes(x, arg, MAGMA_MAC_MAX_SIZE, c->tag);
1047 case EVP_CTRL_COPY: {
1048 EVP_CIPHER_CTX *out = ptr;
1049 struct ossl_gost_cipher_ctx *in_cctx = EVP_CIPHER_CTX_get_cipher_data(ctx);
1050 struct ossl_gost_cipher_ctx *out_cctx = EVP_CIPHER_CTX_get_cipher_data(out);
1052 if (in_cctx->omac_ctx == out_cctx->omac_ctx) {
1053 out_cctx->omac_ctx = EVP_MD_CTX_new();
1054 if (out_cctx->omac_ctx == NULL) {
1055 GOSTerr(GOST_F_MAGMA_CIPHER_CTL_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
1059 return EVP_MD_CTX_copy(out_cctx->omac_ctx, in_cctx->omac_ctx);
1062 return magma_cipher_ctl(ctx, type, arg, ptr);
1067 /* Set cipher parameters from ASN1 structure */
1068 int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1071 unsigned char *buf = NULL;
1072 unsigned char *p = NULL;
1073 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1074 GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
1075 ASN1_OCTET_STRING *os = NULL;
1077 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1080 if (!ASN1_OCTET_STRING_set
1081 (gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
1082 GOST_CIPHER_PARAMS_free(gcp);
1083 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1086 ASN1_OBJECT_free(gcp->enc_param_set);
1087 gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
1089 len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
1090 p = buf = OPENSSL_malloc(len);
1092 GOST_CIPHER_PARAMS_free(gcp);
1093 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1096 i2d_GOST_CIPHER_PARAMS(gcp, &p);
1097 GOST_CIPHER_PARAMS_free(gcp);
1099 os = ASN1_OCTET_STRING_new();
1101 if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
1103 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1108 ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
1112 /* Store parameters into ASN1 structure */
1113 int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1116 GOST_CIPHER_PARAMS *gcp = NULL;
1118 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1121 if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
1125 p = params->value.sequence->data;
1127 gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
1128 params->value.sequence->length);
1130 len = gcp->iv->length;
1131 if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
1132 GOST_CIPHER_PARAMS_free(gcp);
1133 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
1137 nid = OBJ_obj2nid(gcp->enc_param_set);
1138 if (nid == NID_undef) {
1139 GOST_CIPHER_PARAMS_free(gcp);
1140 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
1141 GOST_R_INVALID_CIPHER_PARAM_OID);
1145 if (!gost_cipher_set_param(c, nid)) {
1146 GOST_CIPHER_PARAMS_free(gcp);
1149 /*XXX missing non-const accessor */
1150 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
1151 EVP_CIPHER_CTX_iv_length(ctx));
1153 GOST_CIPHER_PARAMS_free(gcp);
1158 #define MAGMA_UKM_LEN 12
1159 static int magma_set_asn1_parameters (EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1161 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1162 c->key_meshing = 8192;
1164 return gost2015_set_asn1_params(params, EVP_CIPHER_CTX_original_iv(ctx), 4,
1168 static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1170 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1171 unsigned char iv[16];
1173 c->key_meshing = 8192;
1175 if (gost2015_get_asn1_params(params, MAGMA_UKM_LEN, iv, 4, c->kdf_seed) < 0)
1178 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, sizeof(iv));
1179 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv, sizeof(iv));
1180 /* Key meshing 8 kb*/
1181 c->key_meshing = 8192;
1186 static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
1188 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1189 memset(c->buffer, 0, sizeof(c->buffer));
1190 memset(c->partial_block, 0, sizeof(c->partial_block));
1195 gost_init(&(c->cctx), block);
1199 static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
1201 return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
1204 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
1206 return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
1209 static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
1210 const unsigned char *data)
1213 * We are using NULL for iv because CryptoPro doesn't interpret
1214 * internal state of MAC algorithm as iv during keymeshing (but does
1215 * initialize internal state from iv in key transport
1217 assert(c->count % 8 == 0 && c->count <= 1024);
1218 if (c->key_meshing && c->count == 1024) {
1219 cryptopro_key_meshing(&(c->cctx), NULL);
1221 mac_block(&(c->cctx), c->buffer, data);
1222 c->count = c->count % 1024 + 8;
1225 int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
1227 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1228 const unsigned char *p = data;
1229 size_t bytes = count;
1230 if (!(c->key_set)) {
1231 GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
1234 if (c->bytes_left) {
1236 for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
1237 c->partial_block[i] = *p;
1240 mac_block_mesh(c, c->partial_block);
1247 mac_block_mesh(c, p);
1252 memcpy(c->partial_block, p, bytes);
1254 c->bytes_left = bytes;
1258 int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
1260 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1262 GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
1265 if (c->count == 0 && c->bytes_left) {
1266 unsigned char buffer[8];
1267 memset(buffer, 0, 8);
1268 gost_imit_update(ctx, buffer, 8);
1270 if (c->bytes_left) {
1272 for (i = c->bytes_left; i < 8; i++) {
1273 c->partial_block[i] = 0;
1275 mac_block_mesh(c, c->partial_block);
1277 get_mac(c->buffer, 8 * c->dgst_size, md);
1281 int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
1284 case EVP_MD_CTRL_KEY_LEN:
1285 *((unsigned int *)(ptr)) = 32;
1287 case EVP_MD_CTRL_SET_KEY:
1289 struct ossl_gost_imit_ctx *gost_imit_ctx = EVP_MD_CTX_md_data(ctx);
1291 if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
1292 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
1295 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
1298 struct gost_mac_key *key = (struct gost_mac_key *)ptr;
1299 if (key->mac_param_nid != NID_undef) {
1300 const struct gost_cipher_info *param =
1301 get_encryption_params(OBJ_nid2obj(key->mac_param_nid));
1302 if (param == NULL) {
1303 GOSTerr(GOST_F_GOST_IMIT_CTRL,
1304 GOST_R_INVALID_MAC_PARAMS);
1307 gost_init(&(gost_imit_ctx->cctx), param->sblock);
1309 gost_key(&(gost_imit_ctx->cctx), key->key);
1310 gost_imit_ctx->key_set = 1;
1313 } else if (arg == 32) {
1314 gost_key(&(gost_imit_ctx->cctx), ptr);
1315 gost_imit_ctx->key_set = 1;
1318 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
1321 case EVP_MD_CTRL_XOF_LEN:
1323 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1324 if (arg < 1 || arg > 8) {
1325 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
1337 int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
1339 if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
1340 memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
1341 sizeof(struct ossl_gost_imit_ctx));
1346 /* Clean up imit ctx */
1347 int gost_imit_cleanup(EVP_MD_CTX *ctx)
1349 memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));
1352 /* vim: set expandtab cinoptions=\:0,l1,t0,g0,(0 sw=4 : */