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 static EVP_CIPHER *_hidden_magma_ctr = NULL;
179 const EVP_CIPHER *cipher_magma_ctr(void)
181 if (_hidden_magma_ctr == NULL
182 && ((_hidden_magma_ctr =
183 EVP_CIPHER_meth_new(NID_magma_ctr, 1 /* block_size */ ,
184 32 /* key_size */ )) == NULL
185 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr, 4)
186 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr,
188 EVP_CIPH_NO_PADDING |
191 EVP_CIPH_ALWAYS_CALL_INIT)
192 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr, magma_cipher_init)
193 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr,
195 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr,
197 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr,
199 ossl_gost_cipher_ctx))
200 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr,
201 magma_set_asn1_parameters)
202 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr,
203 magma_get_asn1_parameters)
204 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr, magma_cipher_ctl))) {
205 EVP_CIPHER_meth_free(_hidden_magma_ctr);
206 _hidden_magma_ctr = NULL;
208 return _hidden_magma_ctr;
211 static EVP_CIPHER *_hidden_magma_ctr_acpkm = NULL;
212 const EVP_CIPHER *cipher_magma_ctr_acpkm(void)
214 if (_hidden_magma_ctr_acpkm == NULL
215 && ((_hidden_magma_ctr_acpkm =
216 EVP_CIPHER_meth_new(NID_magma_ctr_acpkm, 1 /* block_size */ ,
217 32 /* key_size */ )) == NULL
218 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr_acpkm, 4)
219 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr_acpkm,
221 EVP_CIPH_NO_PADDING |
224 EVP_CIPH_ALWAYS_CALL_INIT)
225 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr_acpkm, magma_cipher_init)
226 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr_acpkm,
228 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr_acpkm,
230 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr_acpkm,
232 ossl_gost_cipher_ctx))
233 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr_acpkm,
234 magma_set_asn1_parameters)
235 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr_acpkm,
236 magma_get_asn1_parameters)
238 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr_acpkm, magma_cipher_ctl))) {
239 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm);
240 _hidden_magma_ctr_acpkm = NULL;
242 return _hidden_magma_ctr_acpkm;
245 static EVP_CIPHER *_hidden_magma_ctr_acpkm_omac = NULL;
246 const EVP_CIPHER *cipher_magma_ctr_acpkm_omac(void)
248 if (_hidden_magma_ctr_acpkm_omac == NULL
249 && ((_hidden_magma_ctr_acpkm_omac =
250 EVP_CIPHER_meth_new(NID_magma_ctr_acpkm_omac, 1 /* block_size */ ,
251 32 /* key_size */ )) == NULL
252 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr_acpkm_omac, 4)
253 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr_acpkm_omac,
255 EVP_CIPH_NO_PADDING |
258 EVP_CIPH_ALWAYS_CALL_INIT |
259 EVP_CIPH_CUSTOM_COPY |
260 EVP_CIPH_FLAG_CUSTOM_CIPHER |
261 EVP_CIPH_FLAG_CIPHER_WITH_MAC)
262 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr_acpkm_omac, magma_cipher_init_ctr_acpkm_omac)
263 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr_acpkm_omac,
264 magma_cipher_do_ctr_acpkm_omac)
265 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr_acpkm_omac,
267 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr_acpkm_omac,
269 ossl_gost_cipher_ctx))
270 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr_acpkm_omac,
271 magma_set_asn1_parameters)
272 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr_acpkm_omac,
273 magma_get_asn1_parameters)
274 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr_acpkm_omac, magma_cipher_ctl_acpkm_omac))) {
275 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm_omac);
276 _hidden_magma_ctr_acpkm_omac = NULL;
278 return _hidden_magma_ctr_acpkm_omac;
281 static EVP_CIPHER *_hidden_magma_cbc = NULL;
282 const EVP_CIPHER *cipher_magma_cbc(void)
284 if (_hidden_magma_cbc == NULL
285 && ((_hidden_magma_cbc =
286 EVP_CIPHER_meth_new(NID_magma_cbc, 8 /* block_size */ ,
287 32 /* key_size */ )) == NULL
288 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_cbc, 8)
289 || !EVP_CIPHER_meth_set_flags(_hidden_magma_cbc,
293 EVP_CIPH_ALWAYS_CALL_INIT)
294 || !EVP_CIPHER_meth_set_init(_hidden_magma_cbc, magma_cipher_init)
295 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_cbc,
297 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_cbc,
299 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_cbc,
301 ossl_gost_cipher_ctx))
302 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_cbc, magma_cipher_ctl))) {
303 EVP_CIPHER_meth_free(_hidden_magma_cbc);
304 _hidden_magma_cbc = NULL;
306 return _hidden_magma_cbc;
309 /* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */
310 /* Init functions which set specific parameters */
311 static int gost_imit_init_cpa(EVP_MD_CTX *ctx);
312 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx);
313 /* process block of data */
314 static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count);
315 /* Return computed value */
316 static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md);
318 static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
319 static int gost_imit_cleanup(EVP_MD_CTX *ctx);
320 /* Control function, knows how to set MAC key.*/
321 static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr);
323 static EVP_MD *_hidden_Gost28147_89_MAC_md = NULL;
324 static EVP_MD *_hidden_Gost28147_89_12_MAC_md = NULL;
326 EVP_MD *imit_gost_cpa(void)
328 if (_hidden_Gost28147_89_MAC_md == NULL) {
331 if ((md = EVP_MD_meth_new(NID_id_Gost28147_89_MAC, NID_undef)) == NULL
332 || !EVP_MD_meth_set_result_size(md, 4)
333 || !EVP_MD_meth_set_input_blocksize(md, 8)
334 || !EVP_MD_meth_set_app_datasize(md,
335 sizeof(struct ossl_gost_imit_ctx))
336 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
337 || !EVP_MD_meth_set_init(md, gost_imit_init_cpa)
338 || !EVP_MD_meth_set_update(md, gost_imit_update)
339 || !EVP_MD_meth_set_final(md, gost_imit_final)
340 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
341 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
342 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
343 EVP_MD_meth_free(md);
346 _hidden_Gost28147_89_MAC_md = md;
348 return _hidden_Gost28147_89_MAC_md;
351 void imit_gost_cpa_destroy(void)
353 EVP_MD_meth_free(_hidden_Gost28147_89_MAC_md);
354 _hidden_Gost28147_89_MAC_md = NULL;
357 EVP_MD *imit_gost_cp_12(void)
359 if (_hidden_Gost28147_89_12_MAC_md == NULL) {
362 if ((md = EVP_MD_meth_new(NID_gost_mac_12, NID_undef)) == NULL
363 || !EVP_MD_meth_set_result_size(md, 4)
364 || !EVP_MD_meth_set_input_blocksize(md, 8)
365 || !EVP_MD_meth_set_app_datasize(md,
366 sizeof(struct ossl_gost_imit_ctx))
367 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
368 || !EVP_MD_meth_set_init(md, gost_imit_init_cp_12)
369 || !EVP_MD_meth_set_update(md, gost_imit_update)
370 || !EVP_MD_meth_set_final(md, gost_imit_final)
371 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
372 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
373 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
374 EVP_MD_meth_free(md);
377 _hidden_Gost28147_89_12_MAC_md = md;
379 return _hidden_Gost28147_89_12_MAC_md;
382 void imit_gost_cp_12_destroy(void)
384 EVP_MD_meth_free(_hidden_Gost28147_89_12_MAC_md);
385 _hidden_Gost28147_89_12_MAC_md = NULL;
389 * Correspondence between gost parameter OIDs and substitution blocks
390 * NID field is filed by register_gost_NID function in engine.c
391 * upon engine initialization
394 struct gost_cipher_info gost_cipher_list[] = {
401 * {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
403 {NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
405 {NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
407 {NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
409 {NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
411 {NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
412 {NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
417 * get encryption parameters from crypto network settings FIXME For now we
418 * use environment var CRYPT_PARAMS as place to store these settings.
419 * Actually, it is better to use engine control command, read from
420 * configuration file to set them
422 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
425 struct gost_cipher_info *param;
427 const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
428 if (!params || !strlen(params)) {
430 for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
431 if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
432 return &gost_cipher_list[i];
433 return &gost_cipher_list[0];
436 nid = OBJ_txt2nid(params);
437 if (nid == NID_undef) {
438 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
439 GOST_R_INVALID_CIPHER_PARAM_OID);
440 ERR_add_error_data(3, "Unsupported CRYPT_PARAMS='",
441 params, "' specified in environment or in config");
445 nid = OBJ_obj2nid(obj);
447 for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
449 if (!param->sblock) {
450 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
456 /* Sets cipher param from paramset NID. */
457 static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
459 const struct gost_cipher_info *param;
460 param = get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
464 c->paramNID = param->nid;
465 c->key_meshing = param->key_meshing;
467 gost_init(&(c->cctx), param->sblock);
471 /* Initializes EVP_CIPHER_CTX by paramset NID */
472 static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
473 const unsigned char *key,
474 const unsigned char *iv, int enc,
475 int paramNID, int mode)
477 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
478 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
479 if (!gost_cipher_set_param(c, paramNID))
481 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
484 gost_key(&(c->cctx), key);
486 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
487 EVP_CIPHER_CTX_iv_length(ctx));
489 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
490 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
494 static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
495 const unsigned char *key,
496 const unsigned char *iv,
497 gost_subst_block * block)
499 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
500 gost_init(&(c->cctx), block);
504 gost_key(&(c->cctx), key);
506 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
507 EVP_CIPHER_CTX_iv_length(ctx));
509 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
510 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
514 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
515 const unsigned char *iv, int enc)
517 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
520 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
521 const unsigned char *key,
522 const unsigned char *iv, int enc)
524 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
527 /* Initializes EVP_CIPHER_CTX with default values */
528 int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
529 const unsigned char *iv, int enc)
531 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
535 /* Initializes EVP_CIPHER_CTX with default values */
536 int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
537 const unsigned char *iv, int enc)
539 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
543 /* Initializes EVP_CIPHER_CTX with default values */
544 int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
545 const unsigned char *iv, int enc)
547 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
548 /* FIXME this is just initializtion check */
549 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
550 if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
552 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
555 if (init_zero_kdf_seed(c->kdf_seed) == 0)
561 magma_key(&(c->cctx), key);
563 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
564 EVP_CIPHER_CTX_iv_length(ctx));
566 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
567 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
569 if (EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm
570 || EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm_omac) {
571 c->key_meshing = 1024;
579 /* Initializes EVP_CIPHER_CTX with default values */
580 int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
581 const unsigned char *iv, int enc)
584 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
585 unsigned char cipher_key[32];
586 c->omac_ctx = EVP_MD_CTX_new();
588 if (c->omac_ctx == NULL) {
589 GOSTerr(GOST_F_MAGMA_CIPHER_INIT_CTR_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
593 if (gost2015_acpkm_omac_init(NID_magma_mac, enc, key,
594 c->omac_ctx, cipher_key, c->kdf_seed) != 1) {
595 EVP_MD_CTX_free(c->omac_ctx);
600 return magma_cipher_init(ctx, cipher_key, iv, enc);
603 return magma_cipher_init(ctx, key, iv, enc);
607 * Wrapper around gostcrypt function from gost89.c which perform key meshing
610 static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
612 struct ossl_gost_cipher_ctx *c = ctx;
613 assert(c->count % 8 == 0 && c->count <= 1024);
614 if (c->key_meshing && c->count == 1024) {
615 cryptopro_key_meshing(&(c->cctx), iv);
617 gostcrypt(&(c->cctx), iv, buf);
618 c->count = c->count % 1024 + 8;
621 static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
623 struct ossl_gost_cipher_ctx *c = ctx;
625 unsigned char buf1[8];
626 assert(c->count % 8 == 0 && c->count <= 1024);
627 if (c->key_meshing && c->count == 1024) {
628 cryptopro_key_meshing(&(c->cctx), iv);
631 gostcrypt(&(c->cctx), iv, buf1);
635 g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
637 buf1[0] = (unsigned char)(g & 0xff);
638 buf1[1] = (unsigned char)((g >> 8) & 0xff);
639 buf1[2] = (unsigned char)((g >> 16) & 0xff);
640 buf1[3] = (unsigned char)((g >> 24) & 0xff);
641 g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
644 if (go > g) /* overflow */
646 buf1[4] = (unsigned char)(g & 0xff);
647 buf1[5] = (unsigned char)((g >> 8) & 0xff);
648 buf1[6] = (unsigned char)((g >> 16) & 0xff);
649 buf1[7] = (unsigned char)((g >> 24) & 0xff);
651 gostcrypt(&(c->cctx), buf1, buf);
652 c->count = c->count % 1024 + 8;
655 /* GOST encryption in CBC mode */
656 int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
657 const unsigned char *in, size_t inl)
660 const unsigned char *in_ptr = in;
661 unsigned char *out_ptr = out;
663 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
664 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
665 if (EVP_CIPHER_CTX_encrypting(ctx)) {
668 for (i = 0; i < 8; i++) {
669 b[i] = iv[i] ^ in_ptr[i];
671 gostcrypt(&(c->cctx), b, out_ptr);
672 memcpy(iv, out_ptr, 8);
679 gostdecrypt(&(c->cctx), in_ptr, b);
680 for (i = 0; i < 8; i++) {
681 out_ptr[i] = iv[i] ^ b[i];
683 memcpy(iv, in_ptr, 8);
692 /* MAGMA encryption in CBC mode */
693 int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
694 const unsigned char *in, size_t inl)
698 const unsigned char *in_ptr = in;
699 unsigned char *out_ptr = out;
701 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
702 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
703 if (EVP_CIPHER_CTX_encrypting(ctx)) {
706 for (i = 0; i < 8; i++) {
707 b[7 - i] = iv[i] ^ in_ptr[i];
709 gostcrypt(&(c->cctx), b, d);
711 for (i = 0; i < 8; i++) {
712 out_ptr[7 - i] = d[i];
714 memcpy(iv, out_ptr, 8);
721 for (i = 0; i < 8; i++) {
722 d[7 - i] = in_ptr[i];
724 gostdecrypt(&(c->cctx), d, b);
725 memcpy(d, in_ptr, 8);
726 for (i = 0; i < 8; i++) {
727 out_ptr[i] = iv[i] ^ b[7 - i];
738 /* increment counter (64-bit int) by 1 */
739 static void ctr64_inc(unsigned char *counter)
741 inc_counter(counter, 8);
744 /* MAGMA encryption in CTR mode */
745 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
746 const unsigned char *in, size_t inl)
748 const unsigned char *in_ptr = in;
749 unsigned char *out_ptr = out;
752 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
753 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
754 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
756 /* Process partial blocks */
757 if (EVP_CIPHER_CTX_num(ctx)) {
758 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
759 j++, i++, in_ptr++, out_ptr++) {
760 *out_ptr = buf[7 - j] ^ (*in_ptr);
763 EVP_CIPHER_CTX_set_num(ctx, 0);
765 EVP_CIPHER_CTX_set_num(ctx, j);
770 /* Process full blocks */
771 for (; i + 8 <= inl; i += 8, in_ptr += 8, out_ptr += 8) {
772 for (j = 0; j < 8; j++) {
775 gostcrypt(&(c->cctx), b, buf);
776 for (j = 0; j < 8; j++) {
777 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
781 if (c->key_meshing && (c->count % c->key_meshing == 0))
782 acpkm_magma_key_meshing(&(c->cctx));
785 /* Process the rest of plaintext */
787 for (j = 0; j < 8; j++) {
790 gostcrypt(&(c->cctx), b, buf);
792 for (j = 0; i < inl; j++, i++) {
793 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
798 if (c->key_meshing && (c->count % c->key_meshing == 0))
799 acpkm_magma_key_meshing(&(c->cctx));
801 EVP_CIPHER_CTX_set_num(ctx, j);
803 EVP_CIPHER_CTX_set_num(ctx, 0);
809 /* MAGMA encryption in CTR mode */
810 static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
811 const unsigned char *in, size_t inl)
813 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
815 if (in == NULL && inl == 0) /* Final call */
816 return gost2015_final_call(ctx, c->omac_ctx, MAGMA_MAC_MAX_SIZE, c->tag, magma_cipher_do_ctr);
821 /* As in and out can be the same pointer, process unencrypted here */
822 if (EVP_CIPHER_CTX_encrypting(ctx))
823 EVP_DigestSignUpdate(c->omac_ctx, in, inl);
825 if (magma_cipher_do_ctr(ctx, out, in, inl) != inl)
828 /* As in and out can be the same pointer, process decrypted here */
829 if (!EVP_CIPHER_CTX_encrypting(ctx))
830 EVP_DigestSignUpdate(c->omac_ctx, out, inl);
834 /* GOST encryption in CFB mode */
835 int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
836 const unsigned char *in, size_t inl)
838 const unsigned char *in_ptr = in;
839 unsigned char *out_ptr = out;
842 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
843 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
844 /* process partial block if any */
845 if (EVP_CIPHER_CTX_num(ctx)) {
846 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
847 j++, i++, in_ptr++, out_ptr++) {
848 if (!EVP_CIPHER_CTX_encrypting(ctx))
849 buf[j + 8] = *in_ptr;
850 *out_ptr = buf[j] ^ (*in_ptr);
851 if (EVP_CIPHER_CTX_encrypting(ctx))
852 buf[j + 8] = *out_ptr;
855 memcpy(iv, buf + 8, 8);
856 EVP_CIPHER_CTX_set_num(ctx, 0);
858 EVP_CIPHER_CTX_set_num(ctx, j);
863 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
865 * block cipher current iv
867 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
869 * xor next block of input text with it and output it
874 if (!EVP_CIPHER_CTX_encrypting(ctx))
875 memcpy(iv, in_ptr, 8);
876 for (j = 0; j < 8; j++) {
877 out_ptr[j] = buf[j] ^ in_ptr[j];
880 /* Next iv is next block of cipher text */
881 if (EVP_CIPHER_CTX_encrypting(ctx))
882 memcpy(iv, out_ptr, 8);
884 /* Process rest of buffer */
886 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
887 if (!EVP_CIPHER_CTX_encrypting(ctx))
888 memcpy(buf + 8, in_ptr, inl - i);
889 for (j = 0; i < inl; j++, i++) {
890 out_ptr[j] = buf[j] ^ in_ptr[j];
892 EVP_CIPHER_CTX_set_num(ctx, j);
893 if (EVP_CIPHER_CTX_encrypting(ctx))
894 memcpy(buf + 8, out_ptr, j);
896 EVP_CIPHER_CTX_set_num(ctx, 0);
901 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
902 const unsigned char *in, size_t inl)
904 const unsigned char *in_ptr = in;
905 unsigned char *out_ptr = out;
908 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
909 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
910 /* process partial block if any */
911 if (EVP_CIPHER_CTX_num(ctx)) {
912 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
913 j++, i++, in_ptr++, out_ptr++) {
914 *out_ptr = buf[j] ^ (*in_ptr);
917 EVP_CIPHER_CTX_set_num(ctx, 0);
919 EVP_CIPHER_CTX_set_num(ctx, j);
924 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
926 * block cipher current iv
929 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
931 * xor next block of input text with it and output it
936 for (j = 0; j < 8; j++) {
937 out_ptr[j] = buf[j] ^ in_ptr[j];
940 /* Process rest of buffer */
942 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
943 for (j = 0; i < inl; j++, i++) {
944 out_ptr[j] = buf[j] ^ in_ptr[j];
946 EVP_CIPHER_CTX_set_num(ctx, j);
948 EVP_CIPHER_CTX_set_num(ctx, 0);
953 /* Cleaning up of EVP_CIPHER_CTX */
954 int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
956 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
957 EVP_MD_CTX_free(c->omac_ctx);
958 gost_destroy(&(c->cctx));
959 EVP_CIPHER_CTX_set_app_data(ctx, NULL);
963 /* Control function for gost cipher */
964 int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
967 case EVP_CTRL_RAND_KEY:
970 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
971 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
976 case EVP_CTRL_PBE_PRF_NID:
978 const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
979 int nid = NID_id_tc26_hmac_gost_3411_2012_512;
982 if (!strcmp("md_gost12_256", params))
983 nid = NID_id_tc26_hmac_gost_3411_2012_256;
984 else if (!strcmp("md_gost12_512", params))
985 nid = NID_id_tc26_hmac_gost_3411_2012_512;
986 else if (!strcmp("md_gost94", params))
987 nid = NID_id_HMACGostR3411_94;
995 case EVP_CTRL_SET_SBOX:
997 struct ossl_gost_cipher_ctx *c =
998 EVP_CIPHER_CTX_get_cipher_data(ctx);
1007 if (c->count != 0) {
1011 nid = OBJ_txt2nid(ptr);
1012 if (nid == NID_undef) {
1016 cur_meshing = c->key_meshing;
1017 ret = gost_cipher_set_param(c, nid);
1018 c->key_meshing = cur_meshing;
1023 case EVP_CTRL_KEY_MESH:
1025 struct ossl_gost_cipher_ctx *c =
1026 EVP_CIPHER_CTX_get_cipher_data(ctx);
1032 if (c->count != 0) {
1036 c->key_meshing = arg;
1040 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1046 /* Control function for gost cipher */
1047 int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1050 case EVP_CTRL_RAND_KEY:
1052 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
1053 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
1057 case EVP_CTRL_KEY_MESH:
1059 struct ossl_gost_cipher_ctx *c =
1060 EVP_CIPHER_CTX_get_cipher_data(ctx);
1066 if (c->count != 0) {
1070 c->key_meshing = arg;
1074 GOSTerr(GOST_F_MAGMA_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1080 static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1084 case EVP_CTRL_PROCESS_UNPROTECTED:
1086 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1087 STACK_OF(X509_ATTRIBUTE) *x = ptr;
1088 return gost2015_process_unprotected_attributes(x, arg, MAGMA_MAC_MAX_SIZE, c->tag);
1090 case EVP_CTRL_COPY: {
1091 EVP_CIPHER_CTX *out = ptr;
1092 struct ossl_gost_cipher_ctx *in_cctx = EVP_CIPHER_CTX_get_cipher_data(ctx);
1093 struct ossl_gost_cipher_ctx *out_cctx = EVP_CIPHER_CTX_get_cipher_data(out);
1095 if (in_cctx->omac_ctx == out_cctx->omac_ctx) {
1096 out_cctx->omac_ctx = EVP_MD_CTX_new();
1097 if (out_cctx->omac_ctx == NULL) {
1098 GOSTerr(GOST_F_MAGMA_CIPHER_CTL_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
1102 return EVP_MD_CTX_copy(out_cctx->omac_ctx, in_cctx->omac_ctx);
1105 return magma_cipher_ctl(ctx, type, arg, ptr);
1110 /* Set cipher parameters from ASN1 structure */
1111 int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1114 unsigned char *buf = NULL;
1115 unsigned char *p = NULL;
1116 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1117 GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
1118 ASN1_OCTET_STRING *os = NULL;
1120 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1123 if (!ASN1_OCTET_STRING_set
1124 (gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
1125 GOST_CIPHER_PARAMS_free(gcp);
1126 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1129 ASN1_OBJECT_free(gcp->enc_param_set);
1130 gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
1132 len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
1133 p = buf = OPENSSL_malloc(len);
1135 GOST_CIPHER_PARAMS_free(gcp);
1136 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1139 i2d_GOST_CIPHER_PARAMS(gcp, &p);
1140 GOST_CIPHER_PARAMS_free(gcp);
1142 os = ASN1_OCTET_STRING_new();
1144 if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
1146 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1151 ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
1155 /* Store parameters into ASN1 structure */
1156 int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1159 GOST_CIPHER_PARAMS *gcp = NULL;
1161 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1164 if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
1168 p = params->value.sequence->data;
1170 gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
1171 params->value.sequence->length);
1173 len = gcp->iv->length;
1174 if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
1175 GOST_CIPHER_PARAMS_free(gcp);
1176 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
1180 nid = OBJ_obj2nid(gcp->enc_param_set);
1181 if (nid == NID_undef) {
1182 GOST_CIPHER_PARAMS_free(gcp);
1183 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
1184 GOST_R_INVALID_CIPHER_PARAM_OID);
1188 if (!gost_cipher_set_param(c, nid)) {
1189 GOST_CIPHER_PARAMS_free(gcp);
1192 /*XXX missing non-const accessor */
1193 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
1194 EVP_CIPHER_CTX_iv_length(ctx));
1196 GOST_CIPHER_PARAMS_free(gcp);
1201 #define MAGMA_UKM_LEN 12
1202 static int magma_set_asn1_parameters (EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1204 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1205 c->key_meshing = 8192;
1207 return gost2015_set_asn1_params(params, EVP_CIPHER_CTX_original_iv(ctx), 4,
1211 static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1213 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1214 unsigned char iv[16];
1216 c->key_meshing = 8192;
1218 if (gost2015_get_asn1_params(params, MAGMA_UKM_LEN, iv, 4, c->kdf_seed) < 0)
1221 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, sizeof(iv));
1222 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv, sizeof(iv));
1223 /* Key meshing 8 kb*/
1224 c->key_meshing = 8192;
1229 static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
1231 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1232 memset(c->buffer, 0, sizeof(c->buffer));
1233 memset(c->partial_block, 0, sizeof(c->partial_block));
1238 gost_init(&(c->cctx), block);
1242 static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
1244 return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
1247 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
1249 return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
1252 static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
1253 const unsigned char *data)
1256 * We are using NULL for iv because CryptoPro doesn't interpret
1257 * internal state of MAC algorithm as iv during keymeshing (but does
1258 * initialize internal state from iv in key transport
1260 assert(c->count % 8 == 0 && c->count <= 1024);
1261 if (c->key_meshing && c->count == 1024) {
1262 cryptopro_key_meshing(&(c->cctx), NULL);
1264 mac_block(&(c->cctx), c->buffer, data);
1265 c->count = c->count % 1024 + 8;
1268 int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
1270 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1271 const unsigned char *p = data;
1272 size_t bytes = count;
1273 if (!(c->key_set)) {
1274 GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
1277 if (c->bytes_left) {
1279 for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
1280 c->partial_block[i] = *p;
1283 mac_block_mesh(c, c->partial_block);
1290 mac_block_mesh(c, p);
1295 memcpy(c->partial_block, p, bytes);
1297 c->bytes_left = bytes;
1301 int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
1303 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1305 GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
1308 if (c->count == 0 && c->bytes_left) {
1309 unsigned char buffer[8];
1310 memset(buffer, 0, 8);
1311 gost_imit_update(ctx, buffer, 8);
1313 if (c->bytes_left) {
1315 for (i = c->bytes_left; i < 8; i++) {
1316 c->partial_block[i] = 0;
1318 mac_block_mesh(c, c->partial_block);
1320 get_mac(c->buffer, 8 * c->dgst_size, md);
1324 int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
1327 case EVP_MD_CTRL_KEY_LEN:
1328 *((unsigned int *)(ptr)) = 32;
1330 case EVP_MD_CTRL_SET_KEY:
1332 struct ossl_gost_imit_ctx *gost_imit_ctx = EVP_MD_CTX_md_data(ctx);
1334 if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
1335 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
1338 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
1341 struct gost_mac_key *key = (struct gost_mac_key *)ptr;
1342 if (key->mac_param_nid != NID_undef) {
1343 const struct gost_cipher_info *param =
1344 get_encryption_params(OBJ_nid2obj(key->mac_param_nid));
1345 if (param == NULL) {
1346 GOSTerr(GOST_F_GOST_IMIT_CTRL,
1347 GOST_R_INVALID_MAC_PARAMS);
1350 gost_init(&(gost_imit_ctx->cctx), param->sblock);
1352 gost_key(&(gost_imit_ctx->cctx), key->key);
1353 gost_imit_ctx->key_set = 1;
1356 } else if (arg == 32) {
1357 gost_key(&(gost_imit_ctx->cctx), ptr);
1358 gost_imit_ctx->key_set = 1;
1361 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
1364 case EVP_MD_CTRL_XOF_LEN:
1366 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1367 if (arg < 1 || arg > 8) {
1368 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
1380 int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
1382 if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
1383 memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
1384 sizeof(struct ossl_gost_imit_ctx));
1389 /* Clean up imit ctx */
1390 int gost_imit_cleanup(EVP_MD_CTX *ctx)
1392 memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));
1395 /* vim: set expandtab cinoptions=\:0,l1,t0,g0,(0 sw=4 : */