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 static EVP_CIPHER *_hidden_magma_ctr_acpkm_omac = NULL;
217 const EVP_CIPHER *cipher_magma_ctr_acpkm_omac(void)
219 if (_hidden_magma_ctr_acpkm_omac == NULL
220 && ((_hidden_magma_ctr_acpkm_omac =
221 EVP_CIPHER_meth_new(NID_magma_ctr_acpkm_omac, 1 /* block_size */ ,
222 32 /* key_size */ )) == NULL
223 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr_acpkm_omac, 4)
224 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr_acpkm_omac,
226 EVP_CIPH_NO_PADDING |
229 EVP_CIPH_ALWAYS_CALL_INIT |
230 EVP_CIPH_CUSTOM_COPY |
231 EVP_CIPH_FLAG_CUSTOM_CIPHER |
232 EVP_CIPH_FLAG_CIPHER_WITH_MAC)
233 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr_acpkm_omac, magma_cipher_init_ctr_acpkm_omac)
234 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr_acpkm_omac,
235 magma_cipher_do_ctr_acpkm_omac)
236 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr_acpkm_omac,
238 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr_acpkm_omac,
240 ossl_gost_cipher_ctx))
241 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr_acpkm_omac,
242 magma_set_asn1_parameters)
243 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr_acpkm_omac,
244 magma_get_asn1_parameters)
245 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr_acpkm_omac, magma_cipher_ctl_acpkm_omac))) {
246 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm_omac);
247 _hidden_magma_ctr_acpkm_omac = NULL;
249 return _hidden_magma_ctr_acpkm_omac;
252 static EVP_CIPHER *_hidden_magma_cbc = NULL;
253 const EVP_CIPHER *cipher_magma_cbc(void)
255 if (_hidden_magma_cbc == NULL
256 && ((_hidden_magma_cbc =
257 EVP_CIPHER_meth_new(NID_magma_cbc, 8 /* block_size */ ,
258 32 /* key_size */ )) == NULL
259 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_cbc, 8)
260 || !EVP_CIPHER_meth_set_flags(_hidden_magma_cbc,
264 EVP_CIPH_ALWAYS_CALL_INIT)
265 || !EVP_CIPHER_meth_set_init(_hidden_magma_cbc, magma_cipher_init)
266 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_cbc,
268 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_cbc,
270 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_cbc,
272 ossl_gost_cipher_ctx))
273 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_cbc, magma_cipher_ctl))) {
274 EVP_CIPHER_meth_free(_hidden_magma_cbc);
275 _hidden_magma_cbc = NULL;
277 return _hidden_magma_cbc;
280 /* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */
281 /* Init functions which set specific parameters */
282 static int gost_imit_init_cpa(EVP_MD_CTX *ctx);
283 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx);
284 /* process block of data */
285 static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count);
286 /* Return computed value */
287 static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md);
289 static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
290 static int gost_imit_cleanup(EVP_MD_CTX *ctx);
291 /* Control function, knows how to set MAC key.*/
292 static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr);
294 static EVP_MD *_hidden_Gost28147_89_MAC_md = NULL;
295 static EVP_MD *_hidden_Gost28147_89_12_MAC_md = NULL;
297 EVP_MD *imit_gost_cpa(void)
299 if (_hidden_Gost28147_89_MAC_md == NULL) {
302 if ((md = EVP_MD_meth_new(NID_id_Gost28147_89_MAC, NID_undef)) == NULL
303 || !EVP_MD_meth_set_result_size(md, 4)
304 || !EVP_MD_meth_set_input_blocksize(md, 8)
305 || !EVP_MD_meth_set_app_datasize(md,
306 sizeof(struct ossl_gost_imit_ctx))
307 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
308 || !EVP_MD_meth_set_init(md, gost_imit_init_cpa)
309 || !EVP_MD_meth_set_update(md, gost_imit_update)
310 || !EVP_MD_meth_set_final(md, gost_imit_final)
311 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
312 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
313 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
314 EVP_MD_meth_free(md);
317 _hidden_Gost28147_89_MAC_md = md;
319 return _hidden_Gost28147_89_MAC_md;
322 void imit_gost_cpa_destroy(void)
324 EVP_MD_meth_free(_hidden_Gost28147_89_MAC_md);
325 _hidden_Gost28147_89_MAC_md = NULL;
328 EVP_MD *imit_gost_cp_12(void)
330 if (_hidden_Gost28147_89_12_MAC_md == NULL) {
333 if ((md = EVP_MD_meth_new(NID_gost_mac_12, NID_undef)) == NULL
334 || !EVP_MD_meth_set_result_size(md, 4)
335 || !EVP_MD_meth_set_input_blocksize(md, 8)
336 || !EVP_MD_meth_set_app_datasize(md,
337 sizeof(struct ossl_gost_imit_ctx))
338 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
339 || !EVP_MD_meth_set_init(md, gost_imit_init_cp_12)
340 || !EVP_MD_meth_set_update(md, gost_imit_update)
341 || !EVP_MD_meth_set_final(md, gost_imit_final)
342 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
343 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
344 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
345 EVP_MD_meth_free(md);
348 _hidden_Gost28147_89_12_MAC_md = md;
350 return _hidden_Gost28147_89_12_MAC_md;
353 void imit_gost_cp_12_destroy(void)
355 EVP_MD_meth_free(_hidden_Gost28147_89_12_MAC_md);
356 _hidden_Gost28147_89_12_MAC_md = NULL;
360 * Correspondence between gost parameter OIDs and substitution blocks
361 * NID field is filed by register_gost_NID function in engine.c
362 * upon engine initialization
365 struct gost_cipher_info gost_cipher_list[] = {
372 * {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
374 {NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
376 {NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
378 {NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
380 {NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
382 {NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
383 {NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
388 * get encryption parameters from crypto network settings FIXME For now we
389 * use environment var CRYPT_PARAMS as place to store these settings.
390 * Actually, it is better to use engine control command, read from
391 * configuration file to set them
393 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
396 struct gost_cipher_info *param;
398 const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
399 if (!params || !strlen(params)) {
401 for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
402 if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
403 return &gost_cipher_list[i];
404 return &gost_cipher_list[0];
407 nid = OBJ_txt2nid(params);
408 if (nid == NID_undef) {
409 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
410 GOST_R_INVALID_CIPHER_PARAM_OID);
411 ERR_add_error_data(3, "Unsupported CRYPT_PARAMS='",
412 params, "' specified in environment or in config");
416 nid = OBJ_obj2nid(obj);
418 for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
420 if (!param->sblock) {
421 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
427 /* Sets cipher param from paramset NID. */
428 static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
430 const struct gost_cipher_info *param;
431 param = get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
435 c->paramNID = param->nid;
436 c->key_meshing = param->key_meshing;
438 gost_init(&(c->cctx), param->sblock);
442 /* Initializes EVP_CIPHER_CTX by paramset NID */
443 static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
444 const unsigned char *key,
445 const unsigned char *iv, int enc,
446 int paramNID, int mode)
448 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
449 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
450 if (!gost_cipher_set_param(c, paramNID))
452 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
455 gost_key(&(c->cctx), key);
457 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
458 EVP_CIPHER_CTX_iv_length(ctx));
460 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
461 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
465 static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
466 const unsigned char *key,
467 const unsigned char *iv,
468 gost_subst_block * block)
470 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
471 gost_init(&(c->cctx), block);
475 gost_key(&(c->cctx), key);
477 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
478 EVP_CIPHER_CTX_iv_length(ctx));
480 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
481 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
485 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
486 const unsigned char *iv, int enc)
488 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
491 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
492 const unsigned char *key,
493 const unsigned char *iv, int enc)
495 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
498 /* Initializes EVP_CIPHER_CTX with default values */
499 int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
500 const unsigned char *iv, int enc)
502 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
506 /* Initializes EVP_CIPHER_CTX with default values */
507 int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
508 const unsigned char *iv, int enc)
510 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
514 /* Initializes EVP_CIPHER_CTX with default values */
515 int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
516 const unsigned char *iv, int enc)
518 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
519 /* FIXME this is just initializtion check */
520 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
521 if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
523 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
526 if (init_zero_kdf_seed(c->kdf_seed) == 0)
532 magma_key(&(c->cctx), key);
534 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
535 EVP_CIPHER_CTX_iv_length(ctx));
537 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
538 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
540 if (EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm
541 || EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm_omac) {
542 c->key_meshing = 1024;
550 /* Initializes EVP_CIPHER_CTX with default values */
551 int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
552 const unsigned char *iv, int enc)
555 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
556 unsigned char cipher_key[32];
557 c->omac_ctx = EVP_MD_CTX_new();
559 if (c->omac_ctx == NULL) {
560 GOSTerr(GOST_F_MAGMA_CIPHER_INIT_CTR_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
564 if (gost2015_acpkm_omac_init(NID_magma_mac, enc, key,
565 c->omac_ctx, cipher_key, c->kdf_seed) != 1) {
566 EVP_MD_CTX_free(c->omac_ctx);
571 return magma_cipher_init(ctx, cipher_key, iv, enc);
574 return magma_cipher_init(ctx, key, iv, enc);
578 * Wrapper around gostcrypt function from gost89.c which perform key meshing
581 static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
583 struct ossl_gost_cipher_ctx *c = ctx;
584 assert(c->count % 8 == 0 && c->count <= 1024);
585 if (c->key_meshing && c->count == 1024) {
586 cryptopro_key_meshing(&(c->cctx), iv);
588 gostcrypt(&(c->cctx), iv, buf);
589 c->count = c->count % 1024 + 8;
592 static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
594 struct ossl_gost_cipher_ctx *c = ctx;
596 unsigned char buf1[8];
597 assert(c->count % 8 == 0 && c->count <= 1024);
598 if (c->key_meshing && c->count == 1024) {
599 cryptopro_key_meshing(&(c->cctx), iv);
602 gostcrypt(&(c->cctx), iv, buf1);
606 g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
608 buf1[0] = (unsigned char)(g & 0xff);
609 buf1[1] = (unsigned char)((g >> 8) & 0xff);
610 buf1[2] = (unsigned char)((g >> 16) & 0xff);
611 buf1[3] = (unsigned char)((g >> 24) & 0xff);
612 g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
615 if (go > g) /* overflow */
617 buf1[4] = (unsigned char)(g & 0xff);
618 buf1[5] = (unsigned char)((g >> 8) & 0xff);
619 buf1[6] = (unsigned char)((g >> 16) & 0xff);
620 buf1[7] = (unsigned char)((g >> 24) & 0xff);
622 gostcrypt(&(c->cctx), buf1, buf);
623 c->count = c->count % 1024 + 8;
626 /* GOST encryption in CBC mode */
627 int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
628 const unsigned char *in, size_t inl)
631 const unsigned char *in_ptr = in;
632 unsigned char *out_ptr = out;
634 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
635 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
636 if (EVP_CIPHER_CTX_encrypting(ctx)) {
639 for (i = 0; i < 8; i++) {
640 b[i] = iv[i] ^ in_ptr[i];
642 gostcrypt(&(c->cctx), b, out_ptr);
643 memcpy(iv, out_ptr, 8);
650 gostdecrypt(&(c->cctx), in_ptr, b);
651 for (i = 0; i < 8; i++) {
652 out_ptr[i] = iv[i] ^ b[i];
654 memcpy(iv, in_ptr, 8);
663 /* MAGMA encryption in CBC mode */
664 int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
665 const unsigned char *in, size_t inl)
669 const unsigned char *in_ptr = in;
670 unsigned char *out_ptr = out;
672 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
673 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
674 if (EVP_CIPHER_CTX_encrypting(ctx)) {
677 for (i = 0; i < 8; i++) {
678 b[7 - i] = iv[i] ^ in_ptr[i];
680 gostcrypt(&(c->cctx), b, d);
682 for (i = 0; i < 8; i++) {
683 out_ptr[7 - i] = d[i];
685 memcpy(iv, out_ptr, 8);
692 for (i = 0; i < 8; i++) {
693 d[7 - i] = in_ptr[i];
695 gostdecrypt(&(c->cctx), d, b);
696 memcpy(d, in_ptr, 8);
697 for (i = 0; i < 8; i++) {
698 out_ptr[i] = iv[i] ^ b[7 - i];
709 /* increment counter (64-bit int) by 1 */
710 static void ctr64_inc(unsigned char *counter)
712 inc_counter(counter, 8);
715 /* MAGMA encryption in CTR mode */
716 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
717 const unsigned char *in, size_t inl)
719 const unsigned char *in_ptr = in;
720 unsigned char *out_ptr = out;
723 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
724 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
725 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
727 /* Process partial blocks */
728 if (EVP_CIPHER_CTX_num(ctx)) {
729 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
730 j++, i++, in_ptr++, out_ptr++) {
731 *out_ptr = buf[7 - j] ^ (*in_ptr);
734 EVP_CIPHER_CTX_set_num(ctx, 0);
736 EVP_CIPHER_CTX_set_num(ctx, j);
741 /* Process full blocks */
742 for (; i + 8 <= inl; i += 8, in_ptr += 8, out_ptr += 8) {
743 for (j = 0; j < 8; j++) {
746 gostcrypt(&(c->cctx), b, buf);
747 for (j = 0; j < 8; j++) {
748 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
752 if (c->key_meshing && (c->count % c->key_meshing == 0))
753 acpkm_magma_key_meshing(&(c->cctx));
756 /* Process the rest of plaintext */
758 for (j = 0; j < 8; j++) {
761 gostcrypt(&(c->cctx), b, buf);
763 for (j = 0; i < inl; j++, i++) {
764 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
769 if (c->key_meshing && (c->count % c->key_meshing == 0))
770 acpkm_magma_key_meshing(&(c->cctx));
772 EVP_CIPHER_CTX_set_num(ctx, j);
774 EVP_CIPHER_CTX_set_num(ctx, 0);
780 /* MAGMA encryption in CTR mode */
781 static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
782 const unsigned char *in, size_t inl)
784 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
786 if (in == NULL && inl == 0) /* Final call */
787 return gost2015_final_call(ctx, c->omac_ctx, MAGMA_MAC_MAX_SIZE, c->tag, magma_cipher_do_ctr);
792 /* As in and out can be the same pointer, process unencrypted here */
793 if (EVP_CIPHER_CTX_encrypting(ctx))
794 EVP_DigestSignUpdate(c->omac_ctx, in, inl);
796 if (magma_cipher_do_ctr(ctx, out, in, inl) != inl)
799 /* As in and out can be the same pointer, process decrypted here */
800 if (!EVP_CIPHER_CTX_encrypting(ctx))
801 EVP_DigestSignUpdate(c->omac_ctx, out, inl);
805 /* GOST encryption in CFB mode */
806 int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
807 const unsigned char *in, size_t inl)
809 const unsigned char *in_ptr = in;
810 unsigned char *out_ptr = out;
813 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
814 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
815 /* process partial block if any */
816 if (EVP_CIPHER_CTX_num(ctx)) {
817 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
818 j++, i++, in_ptr++, out_ptr++) {
819 if (!EVP_CIPHER_CTX_encrypting(ctx))
820 buf[j + 8] = *in_ptr;
821 *out_ptr = buf[j] ^ (*in_ptr);
822 if (EVP_CIPHER_CTX_encrypting(ctx))
823 buf[j + 8] = *out_ptr;
826 memcpy(iv, buf + 8, 8);
827 EVP_CIPHER_CTX_set_num(ctx, 0);
829 EVP_CIPHER_CTX_set_num(ctx, j);
834 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
836 * block cipher current iv
838 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
840 * xor next block of input text with it and output it
845 if (!EVP_CIPHER_CTX_encrypting(ctx))
846 memcpy(iv, in_ptr, 8);
847 for (j = 0; j < 8; j++) {
848 out_ptr[j] = buf[j] ^ in_ptr[j];
851 /* Next iv is next block of cipher text */
852 if (EVP_CIPHER_CTX_encrypting(ctx))
853 memcpy(iv, out_ptr, 8);
855 /* Process rest of buffer */
857 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
858 if (!EVP_CIPHER_CTX_encrypting(ctx))
859 memcpy(buf + 8, in_ptr, inl - i);
860 for (j = 0; i < inl; j++, i++) {
861 out_ptr[j] = buf[j] ^ in_ptr[j];
863 EVP_CIPHER_CTX_set_num(ctx, j);
864 if (EVP_CIPHER_CTX_encrypting(ctx))
865 memcpy(buf + 8, out_ptr, j);
867 EVP_CIPHER_CTX_set_num(ctx, 0);
872 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
873 const unsigned char *in, size_t inl)
875 const unsigned char *in_ptr = in;
876 unsigned char *out_ptr = out;
879 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
880 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
881 /* process partial block if any */
882 if (EVP_CIPHER_CTX_num(ctx)) {
883 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
884 j++, i++, in_ptr++, out_ptr++) {
885 *out_ptr = buf[j] ^ (*in_ptr);
888 EVP_CIPHER_CTX_set_num(ctx, 0);
890 EVP_CIPHER_CTX_set_num(ctx, j);
895 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
897 * block cipher current iv
900 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
902 * xor next block of input text with it and output it
907 for (j = 0; j < 8; j++) {
908 out_ptr[j] = buf[j] ^ in_ptr[j];
911 /* Process rest of buffer */
913 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
914 for (j = 0; i < inl; j++, i++) {
915 out_ptr[j] = buf[j] ^ in_ptr[j];
917 EVP_CIPHER_CTX_set_num(ctx, j);
919 EVP_CIPHER_CTX_set_num(ctx, 0);
924 /* Cleaning up of EVP_CIPHER_CTX */
925 int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
927 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
928 EVP_MD_CTX_free(c->omac_ctx);
929 gost_destroy(&(c->cctx));
930 EVP_CIPHER_CTX_set_app_data(ctx, NULL);
934 /* Control function for gost cipher */
935 int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
938 case EVP_CTRL_RAND_KEY:
941 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
942 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
947 case EVP_CTRL_PBE_PRF_NID:
949 const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
950 int nid = NID_id_tc26_hmac_gost_3411_2012_512;
953 if (!strcmp("md_gost12_256", params))
954 nid = NID_id_tc26_hmac_gost_3411_2012_256;
955 else if (!strcmp("md_gost12_512", params))
956 nid = NID_id_tc26_hmac_gost_3411_2012_512;
957 else if (!strcmp("md_gost94", params))
958 nid = NID_id_HMACGostR3411_94;
966 case EVP_CTRL_SET_SBOX:
968 struct ossl_gost_cipher_ctx *c =
969 EVP_CIPHER_CTX_get_cipher_data(ctx);
982 nid = OBJ_txt2nid(ptr);
983 if (nid == NID_undef) {
987 cur_meshing = c->key_meshing;
988 ret = gost_cipher_set_param(c, nid);
989 c->key_meshing = cur_meshing;
994 case EVP_CTRL_KEY_MESH:
996 struct ossl_gost_cipher_ctx *c =
997 EVP_CIPHER_CTX_get_cipher_data(ctx);
1003 if (c->count != 0) {
1007 c->key_meshing = arg;
1011 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1017 /* Control function for gost cipher */
1018 int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1021 case EVP_CTRL_RAND_KEY:
1023 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
1024 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
1028 case EVP_CTRL_KEY_MESH:
1030 struct ossl_gost_cipher_ctx *c =
1031 EVP_CIPHER_CTX_get_cipher_data(ctx);
1037 if (c->count != 0) {
1041 c->key_meshing = arg;
1045 GOSTerr(GOST_F_MAGMA_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1051 static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1055 case EVP_CTRL_PROCESS_UNPROTECTED:
1057 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1058 STACK_OF(X509_ATTRIBUTE) *x = ptr;
1059 return gost2015_process_unprotected_attributes(x, arg, MAGMA_MAC_MAX_SIZE, c->tag);
1061 case EVP_CTRL_COPY: {
1062 EVP_CIPHER_CTX *out = ptr;
1063 struct ossl_gost_cipher_ctx *in_cctx = EVP_CIPHER_CTX_get_cipher_data(ctx);
1064 struct ossl_gost_cipher_ctx *out_cctx = EVP_CIPHER_CTX_get_cipher_data(out);
1066 if (in_cctx->omac_ctx == out_cctx->omac_ctx) {
1067 out_cctx->omac_ctx = EVP_MD_CTX_new();
1068 if (out_cctx->omac_ctx == NULL) {
1069 GOSTerr(GOST_F_MAGMA_CIPHER_CTL_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
1073 return EVP_MD_CTX_copy(out_cctx->omac_ctx, in_cctx->omac_ctx);
1076 return magma_cipher_ctl(ctx, type, arg, ptr);
1081 /* Set cipher parameters from ASN1 structure */
1082 int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1085 unsigned char *buf = NULL;
1086 unsigned char *p = NULL;
1087 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1088 GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
1089 ASN1_OCTET_STRING *os = NULL;
1091 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1094 if (!ASN1_OCTET_STRING_set
1095 (gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
1096 GOST_CIPHER_PARAMS_free(gcp);
1097 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1100 ASN1_OBJECT_free(gcp->enc_param_set);
1101 gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
1103 len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
1104 p = buf = OPENSSL_malloc(len);
1106 GOST_CIPHER_PARAMS_free(gcp);
1107 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1110 i2d_GOST_CIPHER_PARAMS(gcp, &p);
1111 GOST_CIPHER_PARAMS_free(gcp);
1113 os = ASN1_OCTET_STRING_new();
1115 if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
1117 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1122 ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
1126 /* Store parameters into ASN1 structure */
1127 int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1130 GOST_CIPHER_PARAMS *gcp = NULL;
1132 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1135 if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
1139 p = params->value.sequence->data;
1141 gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
1142 params->value.sequence->length);
1144 len = gcp->iv->length;
1145 if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
1146 GOST_CIPHER_PARAMS_free(gcp);
1147 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
1151 nid = OBJ_obj2nid(gcp->enc_param_set);
1152 if (nid == NID_undef) {
1153 GOST_CIPHER_PARAMS_free(gcp);
1154 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
1155 GOST_R_INVALID_CIPHER_PARAM_OID);
1159 if (!gost_cipher_set_param(c, nid)) {
1160 GOST_CIPHER_PARAMS_free(gcp);
1163 /*XXX missing non-const accessor */
1164 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
1165 EVP_CIPHER_CTX_iv_length(ctx));
1167 GOST_CIPHER_PARAMS_free(gcp);
1172 #define MAGMA_UKM_LEN 12
1173 static int magma_set_asn1_parameters (EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1175 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1176 c->key_meshing = 8192;
1178 return gost2015_set_asn1_params(params, EVP_CIPHER_CTX_original_iv(ctx), 4,
1182 static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1184 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1185 unsigned char iv[16];
1187 c->key_meshing = 8192;
1189 if (gost2015_get_asn1_params(params, MAGMA_UKM_LEN, iv, 4, c->kdf_seed) < 0)
1192 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, sizeof(iv));
1193 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv, sizeof(iv));
1194 /* Key meshing 8 kb*/
1195 c->key_meshing = 8192;
1200 static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
1202 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1203 memset(c->buffer, 0, sizeof(c->buffer));
1204 memset(c->partial_block, 0, sizeof(c->partial_block));
1209 gost_init(&(c->cctx), block);
1213 static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
1215 return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
1218 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
1220 return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
1223 static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
1224 const unsigned char *data)
1227 * We are using NULL for iv because CryptoPro doesn't interpret
1228 * internal state of MAC algorithm as iv during keymeshing (but does
1229 * initialize internal state from iv in key transport
1231 assert(c->count % 8 == 0 && c->count <= 1024);
1232 if (c->key_meshing && c->count == 1024) {
1233 cryptopro_key_meshing(&(c->cctx), NULL);
1235 mac_block(&(c->cctx), c->buffer, data);
1236 c->count = c->count % 1024 + 8;
1239 int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
1241 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1242 const unsigned char *p = data;
1243 size_t bytes = count;
1244 if (!(c->key_set)) {
1245 GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
1248 if (c->bytes_left) {
1250 for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
1251 c->partial_block[i] = *p;
1254 mac_block_mesh(c, c->partial_block);
1261 mac_block_mesh(c, p);
1266 memcpy(c->partial_block, p, bytes);
1268 c->bytes_left = bytes;
1272 int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
1274 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1276 GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
1279 if (c->count == 0 && c->bytes_left) {
1280 unsigned char buffer[8];
1281 memset(buffer, 0, 8);
1282 gost_imit_update(ctx, buffer, 8);
1284 if (c->bytes_left) {
1286 for (i = c->bytes_left; i < 8; i++) {
1287 c->partial_block[i] = 0;
1289 mac_block_mesh(c, c->partial_block);
1291 get_mac(c->buffer, 8 * c->dgst_size, md);
1295 int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
1298 case EVP_MD_CTRL_KEY_LEN:
1299 *((unsigned int *)(ptr)) = 32;
1301 case EVP_MD_CTRL_SET_KEY:
1303 struct ossl_gost_imit_ctx *gost_imit_ctx = EVP_MD_CTX_md_data(ctx);
1305 if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
1306 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
1309 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
1312 struct gost_mac_key *key = (struct gost_mac_key *)ptr;
1313 if (key->mac_param_nid != NID_undef) {
1314 const struct gost_cipher_info *param =
1315 get_encryption_params(OBJ_nid2obj(key->mac_param_nid));
1316 if (param == NULL) {
1317 GOSTerr(GOST_F_GOST_IMIT_CTRL,
1318 GOST_R_INVALID_MAC_PARAMS);
1321 gost_init(&(gost_imit_ctx->cctx), param->sblock);
1323 gost_key(&(gost_imit_ctx->cctx), key->key);
1324 gost_imit_ctx->key_set = 1;
1327 } else if (arg == 32) {
1328 gost_key(&(gost_imit_ctx->cctx), ptr);
1329 gost_imit_ctx->key_set = 1;
1332 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
1335 case EVP_MD_CTRL_XOF_LEN:
1337 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1338 if (arg < 1 || arg > 8) {
1339 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
1351 int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
1353 if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
1354 memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
1355 sizeof(struct ossl_gost_imit_ctx));
1360 /* Clean up imit ctx */
1361 int gost_imit_cleanup(EVP_MD_CTX *ctx)
1363 memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));
1366 /* vim: set expandtab cinoptions=\:0,l1,t0,g0,(0 sw=4 : */