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 static EVP_CIPHER *_hidden_magma_ctr_acpkm = NULL;
198 const EVP_CIPHER *cipher_magma_ctr_acpkm(void)
200 if (_hidden_magma_ctr_acpkm == NULL
201 && ((_hidden_magma_ctr_acpkm =
202 EVP_CIPHER_meth_new(NID_magma_ctr_acpkm, 1 /* block_size */ ,
203 32 /* key_size */ )) == NULL
204 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr_acpkm, 4)
205 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr_acpkm,
207 EVP_CIPH_NO_PADDING |
210 EVP_CIPH_ALWAYS_CALL_INIT)
211 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr_acpkm, magma_cipher_init)
212 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr_acpkm,
214 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr_acpkm,
216 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr_acpkm,
218 ossl_gost_cipher_ctx))
219 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr_acpkm,
220 magma_set_asn1_parameters)
221 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr_acpkm,
222 magma_get_asn1_parameters)
224 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr_acpkm, magma_cipher_ctl))) {
225 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm);
226 _hidden_magma_ctr_acpkm = NULL;
228 return _hidden_magma_ctr_acpkm;
231 static EVP_CIPHER *_hidden_magma_ctr_acpkm_omac = NULL;
232 const EVP_CIPHER *cipher_magma_ctr_acpkm_omac(void)
234 if (_hidden_magma_ctr_acpkm_omac == NULL
235 && ((_hidden_magma_ctr_acpkm_omac =
236 EVP_CIPHER_meth_new(NID_magma_ctr_acpkm_omac, 1 /* block_size */ ,
237 32 /* key_size */ )) == NULL
238 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr_acpkm_omac, 4)
239 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr_acpkm_omac,
241 EVP_CIPH_NO_PADDING |
244 EVP_CIPH_ALWAYS_CALL_INIT |
245 EVP_CIPH_CUSTOM_COPY |
246 EVP_CIPH_FLAG_CUSTOM_CIPHER |
247 EVP_CIPH_FLAG_CIPHER_WITH_MAC)
248 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr_acpkm_omac, magma_cipher_init_ctr_acpkm_omac)
249 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr_acpkm_omac,
250 magma_cipher_do_ctr_acpkm_omac)
251 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr_acpkm_omac,
253 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr_acpkm_omac,
255 ossl_gost_cipher_ctx))
256 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr_acpkm_omac,
257 magma_set_asn1_parameters)
258 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr_acpkm_omac,
259 magma_get_asn1_parameters)
260 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr_acpkm_omac, magma_cipher_ctl_acpkm_omac))) {
261 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm_omac);
262 _hidden_magma_ctr_acpkm_omac = NULL;
264 return _hidden_magma_ctr_acpkm_omac;
267 static EVP_CIPHER *_hidden_magma_cbc = NULL;
268 const EVP_CIPHER *cipher_magma_cbc(void)
270 if (_hidden_magma_cbc == NULL
271 && ((_hidden_magma_cbc =
272 EVP_CIPHER_meth_new(NID_magma_cbc, 8 /* block_size */ ,
273 32 /* key_size */ )) == NULL
274 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_cbc, 8)
275 || !EVP_CIPHER_meth_set_flags(_hidden_magma_cbc,
279 EVP_CIPH_ALWAYS_CALL_INIT)
280 || !EVP_CIPHER_meth_set_init(_hidden_magma_cbc, magma_cipher_init)
281 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_cbc,
283 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_cbc,
285 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_cbc,
287 ossl_gost_cipher_ctx))
288 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_cbc, magma_cipher_ctl))) {
289 EVP_CIPHER_meth_free(_hidden_magma_cbc);
290 _hidden_magma_cbc = NULL;
292 return _hidden_magma_cbc;
295 /* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */
296 /* Init functions which set specific parameters */
297 static int gost_imit_init_cpa(EVP_MD_CTX *ctx);
298 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx);
299 /* process block of data */
300 static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count);
301 /* Return computed value */
302 static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md);
304 static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
305 static int gost_imit_cleanup(EVP_MD_CTX *ctx);
306 /* Control function, knows how to set MAC key.*/
307 static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr);
309 static EVP_MD *_hidden_Gost28147_89_MAC_md = NULL;
310 static EVP_MD *_hidden_Gost28147_89_12_MAC_md = NULL;
312 EVP_MD *imit_gost_cpa(void)
314 if (_hidden_Gost28147_89_MAC_md == NULL) {
317 if ((md = EVP_MD_meth_new(NID_id_Gost28147_89_MAC, NID_undef)) == NULL
318 || !EVP_MD_meth_set_result_size(md, 4)
319 || !EVP_MD_meth_set_input_blocksize(md, 8)
320 || !EVP_MD_meth_set_app_datasize(md,
321 sizeof(struct ossl_gost_imit_ctx))
322 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
323 || !EVP_MD_meth_set_init(md, gost_imit_init_cpa)
324 || !EVP_MD_meth_set_update(md, gost_imit_update)
325 || !EVP_MD_meth_set_final(md, gost_imit_final)
326 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
327 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
328 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
329 EVP_MD_meth_free(md);
332 _hidden_Gost28147_89_MAC_md = md;
334 return _hidden_Gost28147_89_MAC_md;
337 void imit_gost_cpa_destroy(void)
339 EVP_MD_meth_free(_hidden_Gost28147_89_MAC_md);
340 _hidden_Gost28147_89_MAC_md = NULL;
343 EVP_MD *imit_gost_cp_12(void)
345 if (_hidden_Gost28147_89_12_MAC_md == NULL) {
348 if ((md = EVP_MD_meth_new(NID_gost_mac_12, NID_undef)) == NULL
349 || !EVP_MD_meth_set_result_size(md, 4)
350 || !EVP_MD_meth_set_input_blocksize(md, 8)
351 || !EVP_MD_meth_set_app_datasize(md,
352 sizeof(struct ossl_gost_imit_ctx))
353 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
354 || !EVP_MD_meth_set_init(md, gost_imit_init_cp_12)
355 || !EVP_MD_meth_set_update(md, gost_imit_update)
356 || !EVP_MD_meth_set_final(md, gost_imit_final)
357 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
358 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
359 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
360 EVP_MD_meth_free(md);
363 _hidden_Gost28147_89_12_MAC_md = md;
365 return _hidden_Gost28147_89_12_MAC_md;
368 void imit_gost_cp_12_destroy(void)
370 EVP_MD_meth_free(_hidden_Gost28147_89_12_MAC_md);
371 _hidden_Gost28147_89_12_MAC_md = NULL;
375 * Correspondence between gost parameter OIDs and substitution blocks
376 * NID field is filed by register_gost_NID function in engine.c
377 * upon engine initialization
380 struct gost_cipher_info gost_cipher_list[] = {
387 * {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
389 {NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
391 {NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
393 {NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
395 {NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
397 {NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
398 {NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
403 * get encryption parameters from crypto network settings FIXME For now we
404 * use environment var CRYPT_PARAMS as place to store these settings.
405 * Actually, it is better to use engine control command, read from
406 * configuration file to set them
408 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
411 struct gost_cipher_info *param;
413 const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
414 if (!params || !strlen(params)) {
416 for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
417 if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
418 return &gost_cipher_list[i];
419 return &gost_cipher_list[0];
422 nid = OBJ_txt2nid(params);
423 if (nid == NID_undef) {
424 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
425 GOST_R_INVALID_CIPHER_PARAM_OID);
426 ERR_add_error_data(3, "Unsupported CRYPT_PARAMS='",
427 params, "' specified in environment or in config");
431 nid = OBJ_obj2nid(obj);
433 for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
435 if (!param->sblock) {
436 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
442 /* Sets cipher param from paramset NID. */
443 static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
445 const struct gost_cipher_info *param;
446 param = get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
450 c->paramNID = param->nid;
451 c->key_meshing = param->key_meshing;
453 gost_init(&(c->cctx), param->sblock);
457 /* Initializes EVP_CIPHER_CTX by paramset NID */
458 static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
459 const unsigned char *key,
460 const unsigned char *iv, int enc,
461 int paramNID, int mode)
463 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
464 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
465 if (!gost_cipher_set_param(c, paramNID))
467 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
470 gost_key(&(c->cctx), key);
472 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
473 EVP_CIPHER_CTX_iv_length(ctx));
475 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
476 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
480 static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
481 const unsigned char *key,
482 const unsigned char *iv,
483 gost_subst_block * block)
485 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
486 gost_init(&(c->cctx), block);
490 gost_key(&(c->cctx), key);
492 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
493 EVP_CIPHER_CTX_iv_length(ctx));
495 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
496 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
500 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
501 const unsigned char *iv, int enc)
503 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
506 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
507 const unsigned char *key,
508 const unsigned char *iv, int enc)
510 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
513 /* Initializes EVP_CIPHER_CTX with default values */
514 int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
515 const unsigned char *iv, int enc)
517 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
521 /* Initializes EVP_CIPHER_CTX with default values */
522 int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
523 const unsigned char *iv, int enc)
525 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
529 /* Initializes EVP_CIPHER_CTX with default values */
530 int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
531 const unsigned char *iv, int enc)
533 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
534 /* FIXME this is just initializtion check */
535 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
536 if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
538 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
541 if (init_zero_kdf_seed(c->kdf_seed) == 0)
547 magma_key(&(c->cctx), key);
549 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
550 EVP_CIPHER_CTX_iv_length(ctx));
552 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
553 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
555 if (EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm
556 || EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm_omac) {
557 c->key_meshing = 1024;
565 /* Initializes EVP_CIPHER_CTX with default values */
566 int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
567 const unsigned char *iv, int enc)
570 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
571 unsigned char cipher_key[32];
572 c->omac_ctx = EVP_MD_CTX_new();
574 if (c->omac_ctx == NULL) {
575 GOSTerr(GOST_F_MAGMA_CIPHER_INIT_CTR_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
579 if (gost2015_acpkm_omac_init(NID_magma_mac, enc, key,
580 c->omac_ctx, cipher_key, c->kdf_seed) != 1) {
581 EVP_MD_CTX_free(c->omac_ctx);
586 return magma_cipher_init(ctx, cipher_key, iv, enc);
589 return magma_cipher_init(ctx, key, iv, enc);
593 * Wrapper around gostcrypt function from gost89.c which perform key meshing
596 static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
598 struct ossl_gost_cipher_ctx *c = ctx;
599 assert(c->count % 8 == 0 && c->count <= 1024);
600 if (c->key_meshing && c->count == 1024) {
601 cryptopro_key_meshing(&(c->cctx), iv);
603 gostcrypt(&(c->cctx), iv, buf);
604 c->count = c->count % 1024 + 8;
607 static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
609 struct ossl_gost_cipher_ctx *c = ctx;
611 unsigned char buf1[8];
612 assert(c->count % 8 == 0 && c->count <= 1024);
613 if (c->key_meshing && c->count == 1024) {
614 cryptopro_key_meshing(&(c->cctx), iv);
617 gostcrypt(&(c->cctx), iv, buf1);
621 g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
623 buf1[0] = (unsigned char)(g & 0xff);
624 buf1[1] = (unsigned char)((g >> 8) & 0xff);
625 buf1[2] = (unsigned char)((g >> 16) & 0xff);
626 buf1[3] = (unsigned char)((g >> 24) & 0xff);
627 g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
630 if (go > g) /* overflow */
632 buf1[4] = (unsigned char)(g & 0xff);
633 buf1[5] = (unsigned char)((g >> 8) & 0xff);
634 buf1[6] = (unsigned char)((g >> 16) & 0xff);
635 buf1[7] = (unsigned char)((g >> 24) & 0xff);
637 gostcrypt(&(c->cctx), buf1, buf);
638 c->count = c->count % 1024 + 8;
641 /* GOST encryption in CBC mode */
642 int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
643 const unsigned char *in, size_t inl)
646 const unsigned char *in_ptr = in;
647 unsigned char *out_ptr = out;
649 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
650 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
651 if (EVP_CIPHER_CTX_encrypting(ctx)) {
654 for (i = 0; i < 8; i++) {
655 b[i] = iv[i] ^ in_ptr[i];
657 gostcrypt(&(c->cctx), b, out_ptr);
658 memcpy(iv, out_ptr, 8);
665 gostdecrypt(&(c->cctx), in_ptr, b);
666 for (i = 0; i < 8; i++) {
667 out_ptr[i] = iv[i] ^ b[i];
669 memcpy(iv, in_ptr, 8);
678 /* MAGMA encryption in CBC mode */
679 int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
680 const unsigned char *in, size_t inl)
684 const unsigned char *in_ptr = in;
685 unsigned char *out_ptr = out;
687 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
688 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
689 if (EVP_CIPHER_CTX_encrypting(ctx)) {
692 for (i = 0; i < 8; i++) {
693 b[7 - i] = iv[i] ^ in_ptr[i];
695 gostcrypt(&(c->cctx), b, d);
697 for (i = 0; i < 8; i++) {
698 out_ptr[7 - i] = d[i];
700 memcpy(iv, out_ptr, 8);
707 for (i = 0; i < 8; i++) {
708 d[7 - i] = in_ptr[i];
710 gostdecrypt(&(c->cctx), d, b);
711 memcpy(d, in_ptr, 8);
712 for (i = 0; i < 8; i++) {
713 out_ptr[i] = iv[i] ^ b[7 - i];
724 /* increment counter (64-bit int) by 1 */
725 static void ctr64_inc(unsigned char *counter)
727 inc_counter(counter, 8);
730 /* MAGMA encryption in CTR mode */
731 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
732 const unsigned char *in, size_t inl)
734 const unsigned char *in_ptr = in;
735 unsigned char *out_ptr = out;
738 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
739 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
740 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
742 /* Process partial blocks */
743 if (EVP_CIPHER_CTX_num(ctx)) {
744 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
745 j++, i++, in_ptr++, out_ptr++) {
746 *out_ptr = buf[7 - j] ^ (*in_ptr);
749 EVP_CIPHER_CTX_set_num(ctx, 0);
751 EVP_CIPHER_CTX_set_num(ctx, j);
756 /* Process full blocks */
757 for (; i + 8 <= inl; i += 8, in_ptr += 8, out_ptr += 8) {
758 for (j = 0; j < 8; j++) {
761 gostcrypt(&(c->cctx), b, buf);
762 for (j = 0; j < 8; j++) {
763 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
767 if (c->key_meshing && (c->count % c->key_meshing == 0))
768 acpkm_magma_key_meshing(&(c->cctx));
771 /* Process the rest of plaintext */
773 for (j = 0; j < 8; j++) {
776 gostcrypt(&(c->cctx), b, buf);
778 for (j = 0; i < inl; j++, i++) {
779 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
784 if (c->key_meshing && (c->count % c->key_meshing == 0))
785 acpkm_magma_key_meshing(&(c->cctx));
787 EVP_CIPHER_CTX_set_num(ctx, j);
789 EVP_CIPHER_CTX_set_num(ctx, 0);
795 /* MAGMA encryption in CTR mode */
796 static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
797 const unsigned char *in, size_t inl)
799 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
801 if (in == NULL && inl == 0) /* Final call */
802 return gost2015_final_call(ctx, c->omac_ctx, MAGMA_MAC_MAX_SIZE, c->tag, magma_cipher_do_ctr);
807 /* As in and out can be the same pointer, process unencrypted here */
808 if (EVP_CIPHER_CTX_encrypting(ctx))
809 EVP_DigestSignUpdate(c->omac_ctx, in, inl);
811 if (magma_cipher_do_ctr(ctx, out, in, inl) != inl)
814 /* As in and out can be the same pointer, process decrypted here */
815 if (!EVP_CIPHER_CTX_encrypting(ctx))
816 EVP_DigestSignUpdate(c->omac_ctx, out, inl);
820 /* GOST encryption in CFB mode */
821 int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
822 const unsigned char *in, size_t inl)
824 const unsigned char *in_ptr = in;
825 unsigned char *out_ptr = out;
828 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
829 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
830 /* process partial block if any */
831 if (EVP_CIPHER_CTX_num(ctx)) {
832 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
833 j++, i++, in_ptr++, out_ptr++) {
834 if (!EVP_CIPHER_CTX_encrypting(ctx))
835 buf[j + 8] = *in_ptr;
836 *out_ptr = buf[j] ^ (*in_ptr);
837 if (EVP_CIPHER_CTX_encrypting(ctx))
838 buf[j + 8] = *out_ptr;
841 memcpy(iv, buf + 8, 8);
842 EVP_CIPHER_CTX_set_num(ctx, 0);
844 EVP_CIPHER_CTX_set_num(ctx, j);
849 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
851 * block cipher current iv
853 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
855 * xor next block of input text with it and output it
860 if (!EVP_CIPHER_CTX_encrypting(ctx))
861 memcpy(iv, in_ptr, 8);
862 for (j = 0; j < 8; j++) {
863 out_ptr[j] = buf[j] ^ in_ptr[j];
866 /* Next iv is next block of cipher text */
867 if (EVP_CIPHER_CTX_encrypting(ctx))
868 memcpy(iv, out_ptr, 8);
870 /* Process rest of buffer */
872 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
873 if (!EVP_CIPHER_CTX_encrypting(ctx))
874 memcpy(buf + 8, in_ptr, inl - i);
875 for (j = 0; i < inl; j++, i++) {
876 out_ptr[j] = buf[j] ^ in_ptr[j];
878 EVP_CIPHER_CTX_set_num(ctx, j);
879 if (EVP_CIPHER_CTX_encrypting(ctx))
880 memcpy(buf + 8, out_ptr, j);
882 EVP_CIPHER_CTX_set_num(ctx, 0);
887 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
888 const unsigned char *in, size_t inl)
890 const unsigned char *in_ptr = in;
891 unsigned char *out_ptr = out;
894 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
895 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
896 /* process partial block if any */
897 if (EVP_CIPHER_CTX_num(ctx)) {
898 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
899 j++, i++, in_ptr++, out_ptr++) {
900 *out_ptr = buf[j] ^ (*in_ptr);
903 EVP_CIPHER_CTX_set_num(ctx, 0);
905 EVP_CIPHER_CTX_set_num(ctx, j);
910 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
912 * block cipher current iv
915 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
917 * xor next block of input text with it and output it
922 for (j = 0; j < 8; j++) {
923 out_ptr[j] = buf[j] ^ in_ptr[j];
926 /* Process rest of buffer */
928 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
929 for (j = 0; i < inl; j++, i++) {
930 out_ptr[j] = buf[j] ^ in_ptr[j];
932 EVP_CIPHER_CTX_set_num(ctx, j);
934 EVP_CIPHER_CTX_set_num(ctx, 0);
939 /* Cleaning up of EVP_CIPHER_CTX */
940 int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
942 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
943 EVP_MD_CTX_free(c->omac_ctx);
944 gost_destroy(&(c->cctx));
945 EVP_CIPHER_CTX_set_app_data(ctx, NULL);
949 /* Control function for gost cipher */
950 int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
953 case EVP_CTRL_RAND_KEY:
956 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
957 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
962 case EVP_CTRL_PBE_PRF_NID:
964 const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
965 int nid = NID_id_tc26_hmac_gost_3411_2012_512;
968 if (!strcmp("md_gost12_256", params))
969 nid = NID_id_tc26_hmac_gost_3411_2012_256;
970 else if (!strcmp("md_gost12_512", params))
971 nid = NID_id_tc26_hmac_gost_3411_2012_512;
972 else if (!strcmp("md_gost94", params))
973 nid = NID_id_HMACGostR3411_94;
981 case EVP_CTRL_SET_SBOX:
983 struct ossl_gost_cipher_ctx *c =
984 EVP_CIPHER_CTX_get_cipher_data(ctx);
997 nid = OBJ_txt2nid(ptr);
998 if (nid == NID_undef) {
1002 cur_meshing = c->key_meshing;
1003 ret = gost_cipher_set_param(c, nid);
1004 c->key_meshing = cur_meshing;
1009 case EVP_CTRL_KEY_MESH:
1011 struct ossl_gost_cipher_ctx *c =
1012 EVP_CIPHER_CTX_get_cipher_data(ctx);
1018 if (c->count != 0) {
1022 c->key_meshing = arg;
1026 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1032 /* Control function for gost cipher */
1033 int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1036 case EVP_CTRL_RAND_KEY:
1038 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
1039 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
1043 case EVP_CTRL_KEY_MESH:
1045 struct ossl_gost_cipher_ctx *c =
1046 EVP_CIPHER_CTX_get_cipher_data(ctx);
1052 if (c->count != 0) {
1056 c->key_meshing = arg;
1060 GOSTerr(GOST_F_MAGMA_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1066 static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1070 case EVP_CTRL_PROCESS_UNPROTECTED:
1072 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1073 STACK_OF(X509_ATTRIBUTE) *x = ptr;
1074 return gost2015_process_unprotected_attributes(x, arg, MAGMA_MAC_MAX_SIZE, c->tag);
1076 case EVP_CTRL_COPY: {
1077 EVP_CIPHER_CTX *out = ptr;
1078 struct ossl_gost_cipher_ctx *in_cctx = EVP_CIPHER_CTX_get_cipher_data(ctx);
1079 struct ossl_gost_cipher_ctx *out_cctx = EVP_CIPHER_CTX_get_cipher_data(out);
1081 if (in_cctx->omac_ctx == out_cctx->omac_ctx) {
1082 out_cctx->omac_ctx = EVP_MD_CTX_new();
1083 if (out_cctx->omac_ctx == NULL) {
1084 GOSTerr(GOST_F_MAGMA_CIPHER_CTL_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
1088 return EVP_MD_CTX_copy(out_cctx->omac_ctx, in_cctx->omac_ctx);
1091 return magma_cipher_ctl(ctx, type, arg, ptr);
1096 /* Set cipher parameters from ASN1 structure */
1097 int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1100 unsigned char *buf = NULL;
1101 unsigned char *p = NULL;
1102 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1103 GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
1104 ASN1_OCTET_STRING *os = NULL;
1106 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1109 if (!ASN1_OCTET_STRING_set
1110 (gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
1111 GOST_CIPHER_PARAMS_free(gcp);
1112 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1115 ASN1_OBJECT_free(gcp->enc_param_set);
1116 gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
1118 len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
1119 p = buf = OPENSSL_malloc(len);
1121 GOST_CIPHER_PARAMS_free(gcp);
1122 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1125 i2d_GOST_CIPHER_PARAMS(gcp, &p);
1126 GOST_CIPHER_PARAMS_free(gcp);
1128 os = ASN1_OCTET_STRING_new();
1130 if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
1132 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1137 ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
1141 /* Store parameters into ASN1 structure */
1142 int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1145 GOST_CIPHER_PARAMS *gcp = NULL;
1147 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1150 if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
1154 p = params->value.sequence->data;
1156 gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
1157 params->value.sequence->length);
1159 len = gcp->iv->length;
1160 if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
1161 GOST_CIPHER_PARAMS_free(gcp);
1162 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
1166 nid = OBJ_obj2nid(gcp->enc_param_set);
1167 if (nid == NID_undef) {
1168 GOST_CIPHER_PARAMS_free(gcp);
1169 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
1170 GOST_R_INVALID_CIPHER_PARAM_OID);
1174 if (!gost_cipher_set_param(c, nid)) {
1175 GOST_CIPHER_PARAMS_free(gcp);
1178 /*XXX missing non-const accessor */
1179 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
1180 EVP_CIPHER_CTX_iv_length(ctx));
1182 GOST_CIPHER_PARAMS_free(gcp);
1187 #define MAGMA_UKM_LEN 12
1188 static int magma_set_asn1_parameters (EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1190 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1191 c->key_meshing = 8192;
1193 return gost2015_set_asn1_params(params, EVP_CIPHER_CTX_original_iv(ctx), 4,
1197 static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1199 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1200 unsigned char iv[16];
1202 c->key_meshing = 8192;
1204 if (gost2015_get_asn1_params(params, MAGMA_UKM_LEN, iv, 4, c->kdf_seed) < 0)
1207 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, sizeof(iv));
1208 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv, sizeof(iv));
1209 /* Key meshing 8 kb*/
1210 c->key_meshing = 8192;
1215 static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
1217 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1218 memset(c->buffer, 0, sizeof(c->buffer));
1219 memset(c->partial_block, 0, sizeof(c->partial_block));
1224 gost_init(&(c->cctx), block);
1228 static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
1230 return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
1233 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
1235 return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
1238 static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
1239 const unsigned char *data)
1242 * We are using NULL for iv because CryptoPro doesn't interpret
1243 * internal state of MAC algorithm as iv during keymeshing (but does
1244 * initialize internal state from iv in key transport
1246 assert(c->count % 8 == 0 && c->count <= 1024);
1247 if (c->key_meshing && c->count == 1024) {
1248 cryptopro_key_meshing(&(c->cctx), NULL);
1250 mac_block(&(c->cctx), c->buffer, data);
1251 c->count = c->count % 1024 + 8;
1254 int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
1256 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1257 const unsigned char *p = data;
1258 size_t bytes = count;
1259 if (!(c->key_set)) {
1260 GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
1263 if (c->bytes_left) {
1265 for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
1266 c->partial_block[i] = *p;
1269 mac_block_mesh(c, c->partial_block);
1276 mac_block_mesh(c, p);
1281 memcpy(c->partial_block, p, bytes);
1283 c->bytes_left = bytes;
1287 int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
1289 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1291 GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
1294 if (c->count == 0 && c->bytes_left) {
1295 unsigned char buffer[8];
1296 memset(buffer, 0, 8);
1297 gost_imit_update(ctx, buffer, 8);
1299 if (c->bytes_left) {
1301 for (i = c->bytes_left; i < 8; i++) {
1302 c->partial_block[i] = 0;
1304 mac_block_mesh(c, c->partial_block);
1306 get_mac(c->buffer, 8 * c->dgst_size, md);
1310 int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
1313 case EVP_MD_CTRL_KEY_LEN:
1314 *((unsigned int *)(ptr)) = 32;
1316 case EVP_MD_CTRL_SET_KEY:
1318 struct ossl_gost_imit_ctx *gost_imit_ctx = EVP_MD_CTX_md_data(ctx);
1320 if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
1321 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
1324 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
1327 struct gost_mac_key *key = (struct gost_mac_key *)ptr;
1328 if (key->mac_param_nid != NID_undef) {
1329 const struct gost_cipher_info *param =
1330 get_encryption_params(OBJ_nid2obj(key->mac_param_nid));
1331 if (param == NULL) {
1332 GOSTerr(GOST_F_GOST_IMIT_CTRL,
1333 GOST_R_INVALID_MAC_PARAMS);
1336 gost_init(&(gost_imit_ctx->cctx), param->sblock);
1338 gost_key(&(gost_imit_ctx->cctx), key->key);
1339 gost_imit_ctx->key_set = 1;
1342 } else if (arg == 32) {
1343 gost_key(&(gost_imit_ctx->cctx), ptr);
1344 gost_imit_ctx->key_set = 1;
1347 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
1350 case EVP_MD_CTRL_XOF_LEN:
1352 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1353 if (arg < 1 || arg > 8) {
1354 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
1366 int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
1368 if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
1369 memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
1370 sizeof(struct ossl_gost_imit_ctx));
1375 /* Clean up imit ctx */
1376 int gost_imit_cleanup(EVP_MD_CTX *ctx)
1378 memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));
1381 /* vim: set expandtab cinoptions=\:0,l1,t0,g0,(0 sw=4 : */