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 static EVP_CIPHER *_hidden_gost89_cnt = NULL;
141 const EVP_CIPHER *cipher_gost_cpacnt(void)
143 if (_hidden_gost89_cnt == NULL
144 && ((_hidden_gost89_cnt =
145 EVP_CIPHER_meth_new(NID_gost89_cnt, 1 /* block_size */ ,
146 32 /* key_size */ )) == NULL
147 || !EVP_CIPHER_meth_set_iv_length(_hidden_gost89_cnt, 8)
148 || !EVP_CIPHER_meth_set_flags(_hidden_gost89_cnt,
150 EVP_CIPH_NO_PADDING |
153 EVP_CIPH_ALWAYS_CALL_INIT)
154 || !EVP_CIPHER_meth_set_init(_hidden_gost89_cnt,
155 gost_cipher_init_cpa)
156 || !EVP_CIPHER_meth_set_do_cipher(_hidden_gost89_cnt,
158 || !EVP_CIPHER_meth_set_cleanup(_hidden_gost89_cnt,
160 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_gost89_cnt,
162 ossl_gost_cipher_ctx))
163 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_gost89_cnt,
164 gost89_set_asn1_parameters)
165 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_gost89_cnt,
166 gost89_get_asn1_parameters)
167 || !EVP_CIPHER_meth_set_ctrl(_hidden_gost89_cnt, gost_cipher_ctl))) {
168 EVP_CIPHER_meth_free(_hidden_gost89_cnt);
169 _hidden_gost89_cnt = NULL;
171 return _hidden_gost89_cnt;
174 static EVP_CIPHER *_hidden_gost89_cnt_12 = NULL;
175 const EVP_CIPHER *cipher_gost_cpcnt_12(void)
177 if (_hidden_gost89_cnt_12 == NULL
178 && ((_hidden_gost89_cnt_12 =
179 EVP_CIPHER_meth_new(NID_gost89_cnt_12, 1 /* block_size */ ,
180 32 /* key_size */ )) == NULL
181 || !EVP_CIPHER_meth_set_iv_length(_hidden_gost89_cnt_12, 8)
182 || !EVP_CIPHER_meth_set_flags(_hidden_gost89_cnt_12,
184 EVP_CIPH_NO_PADDING |
187 EVP_CIPH_ALWAYS_CALL_INIT)
188 || !EVP_CIPHER_meth_set_init(_hidden_gost89_cnt_12,
189 gost_cipher_init_cp_12)
190 || !EVP_CIPHER_meth_set_do_cipher(_hidden_gost89_cnt_12,
192 || !EVP_CIPHER_meth_set_cleanup(_hidden_gost89_cnt_12,
194 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_gost89_cnt_12,
196 ossl_gost_cipher_ctx))
197 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_gost89_cnt_12,
198 gost89_set_asn1_parameters)
199 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_gost89_cnt_12,
200 gost89_get_asn1_parameters)
201 || !EVP_CIPHER_meth_set_ctrl(_hidden_gost89_cnt_12,
203 EVP_CIPHER_meth_free(_hidden_gost89_cnt_12);
204 _hidden_gost89_cnt_12 = NULL;
206 return _hidden_gost89_cnt_12;
209 static EVP_CIPHER *_hidden_magma_ctr = NULL;
210 const EVP_CIPHER *cipher_magma_ctr(void)
212 if (_hidden_magma_ctr == NULL
213 && ((_hidden_magma_ctr =
214 EVP_CIPHER_meth_new(NID_magma_ctr, 1 /* block_size */ ,
215 32 /* key_size */ )) == NULL
216 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr, 4)
217 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr,
219 EVP_CIPH_NO_PADDING |
222 EVP_CIPH_ALWAYS_CALL_INIT)
223 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr, magma_cipher_init)
224 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr,
226 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr,
228 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr,
230 ossl_gost_cipher_ctx))
231 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr,
232 magma_set_asn1_parameters)
233 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr,
234 magma_get_asn1_parameters)
235 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr, magma_cipher_ctl))) {
236 EVP_CIPHER_meth_free(_hidden_magma_ctr);
237 _hidden_magma_ctr = NULL;
239 return _hidden_magma_ctr;
242 static EVP_CIPHER *_hidden_magma_ctr_acpkm = NULL;
243 const EVP_CIPHER *cipher_magma_ctr_acpkm(void)
245 if (_hidden_magma_ctr_acpkm == NULL
246 && ((_hidden_magma_ctr_acpkm =
247 EVP_CIPHER_meth_new(NID_magma_ctr_acpkm, 1 /* block_size */ ,
248 32 /* key_size */ )) == NULL
249 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr_acpkm, 4)
250 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr_acpkm,
252 EVP_CIPH_NO_PADDING |
255 EVP_CIPH_ALWAYS_CALL_INIT)
256 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr_acpkm, magma_cipher_init)
257 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr_acpkm,
259 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr_acpkm,
261 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr_acpkm,
263 ossl_gost_cipher_ctx))
264 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr_acpkm,
265 magma_set_asn1_parameters)
266 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr_acpkm,
267 magma_get_asn1_parameters)
269 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr_acpkm, magma_cipher_ctl))) {
270 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm);
271 _hidden_magma_ctr_acpkm = NULL;
273 return _hidden_magma_ctr_acpkm;
276 static EVP_CIPHER *_hidden_magma_ctr_acpkm_omac = NULL;
277 const EVP_CIPHER *cipher_magma_ctr_acpkm_omac(void)
279 if (_hidden_magma_ctr_acpkm_omac == NULL
280 && ((_hidden_magma_ctr_acpkm_omac =
281 EVP_CIPHER_meth_new(NID_magma_ctr_acpkm_omac, 1 /* block_size */ ,
282 32 /* key_size */ )) == NULL
283 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr_acpkm_omac, 4)
284 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr_acpkm_omac,
286 EVP_CIPH_NO_PADDING |
289 EVP_CIPH_ALWAYS_CALL_INIT |
290 EVP_CIPH_CUSTOM_COPY |
291 EVP_CIPH_FLAG_CUSTOM_CIPHER |
292 EVP_CIPH_FLAG_CIPHER_WITH_MAC)
293 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr_acpkm_omac, magma_cipher_init_ctr_acpkm_omac)
294 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr_acpkm_omac,
295 magma_cipher_do_ctr_acpkm_omac)
296 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr_acpkm_omac,
298 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr_acpkm_omac,
300 ossl_gost_cipher_ctx))
301 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr_acpkm_omac,
302 magma_set_asn1_parameters)
303 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr_acpkm_omac,
304 magma_get_asn1_parameters)
305 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr_acpkm_omac, magma_cipher_ctl_acpkm_omac))) {
306 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm_omac);
307 _hidden_magma_ctr_acpkm_omac = NULL;
309 return _hidden_magma_ctr_acpkm_omac;
312 static EVP_CIPHER *_hidden_magma_cbc = NULL;
313 const EVP_CIPHER *cipher_magma_cbc(void)
315 if (_hidden_magma_cbc == NULL
316 && ((_hidden_magma_cbc =
317 EVP_CIPHER_meth_new(NID_magma_cbc, 8 /* block_size */ ,
318 32 /* key_size */ )) == NULL
319 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_cbc, 8)
320 || !EVP_CIPHER_meth_set_flags(_hidden_magma_cbc,
324 EVP_CIPH_ALWAYS_CALL_INIT)
325 || !EVP_CIPHER_meth_set_init(_hidden_magma_cbc, magma_cipher_init)
326 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_cbc,
328 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_cbc,
330 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_cbc,
332 ossl_gost_cipher_ctx))
333 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_cbc, magma_cipher_ctl))) {
334 EVP_CIPHER_meth_free(_hidden_magma_cbc);
335 _hidden_magma_cbc = NULL;
337 return _hidden_magma_cbc;
340 /* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */
341 /* Init functions which set specific parameters */
342 static int gost_imit_init_cpa(EVP_MD_CTX *ctx);
343 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx);
344 /* process block of data */
345 static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count);
346 /* Return computed value */
347 static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md);
349 static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
350 static int gost_imit_cleanup(EVP_MD_CTX *ctx);
351 /* Control function, knows how to set MAC key.*/
352 static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr);
354 static EVP_MD *_hidden_Gost28147_89_MAC_md = NULL;
355 static EVP_MD *_hidden_Gost28147_89_12_MAC_md = NULL;
357 EVP_MD *imit_gost_cpa(void)
359 if (_hidden_Gost28147_89_MAC_md == NULL) {
362 if ((md = EVP_MD_meth_new(NID_id_Gost28147_89_MAC, 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_cpa)
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_MAC_md = md;
379 return _hidden_Gost28147_89_MAC_md;
382 void imit_gost_cpa_destroy(void)
384 EVP_MD_meth_free(_hidden_Gost28147_89_MAC_md);
385 _hidden_Gost28147_89_MAC_md = NULL;
388 EVP_MD *imit_gost_cp_12(void)
390 if (_hidden_Gost28147_89_12_MAC_md == NULL) {
393 if ((md = EVP_MD_meth_new(NID_gost_mac_12, NID_undef)) == NULL
394 || !EVP_MD_meth_set_result_size(md, 4)
395 || !EVP_MD_meth_set_input_blocksize(md, 8)
396 || !EVP_MD_meth_set_app_datasize(md,
397 sizeof(struct ossl_gost_imit_ctx))
398 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
399 || !EVP_MD_meth_set_init(md, gost_imit_init_cp_12)
400 || !EVP_MD_meth_set_update(md, gost_imit_update)
401 || !EVP_MD_meth_set_final(md, gost_imit_final)
402 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
403 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
404 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
405 EVP_MD_meth_free(md);
408 _hidden_Gost28147_89_12_MAC_md = md;
410 return _hidden_Gost28147_89_12_MAC_md;
413 void imit_gost_cp_12_destroy(void)
415 EVP_MD_meth_free(_hidden_Gost28147_89_12_MAC_md);
416 _hidden_Gost28147_89_12_MAC_md = NULL;
420 * Correspondence between gost parameter OIDs and substitution blocks
421 * NID field is filed by register_gost_NID function in engine.c
422 * upon engine initialization
425 struct gost_cipher_info gost_cipher_list[] = {
432 * {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
434 {NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
436 {NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
438 {NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
440 {NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
442 {NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
443 {NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
448 * get encryption parameters from crypto network settings FIXME For now we
449 * use environment var CRYPT_PARAMS as place to store these settings.
450 * Actually, it is better to use engine control command, read from
451 * configuration file to set them
453 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
456 struct gost_cipher_info *param;
458 const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
459 if (!params || !strlen(params)) {
461 for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
462 if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
463 return &gost_cipher_list[i];
464 return &gost_cipher_list[0];
467 nid = OBJ_txt2nid(params);
468 if (nid == NID_undef) {
469 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
470 GOST_R_INVALID_CIPHER_PARAM_OID);
471 ERR_add_error_data(3, "Unsupported CRYPT_PARAMS='",
472 params, "' specified in environment or in config");
476 nid = OBJ_obj2nid(obj);
478 for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
480 if (!param->sblock) {
481 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
487 /* Sets cipher param from paramset NID. */
488 static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
490 const struct gost_cipher_info *param;
491 param = get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
495 c->paramNID = param->nid;
496 c->key_meshing = param->key_meshing;
498 gost_init(&(c->cctx), param->sblock);
502 /* Initializes EVP_CIPHER_CTX by paramset NID */
503 static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
504 const unsigned char *key,
505 const unsigned char *iv, int enc,
506 int paramNID, int mode)
508 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
509 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
510 if (!gost_cipher_set_param(c, paramNID))
512 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
515 gost_key(&(c->cctx), key);
517 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
518 EVP_CIPHER_CTX_iv_length(ctx));
520 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
521 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
525 static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
526 const unsigned char *key,
527 const unsigned char *iv,
528 gost_subst_block * block)
530 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
531 gost_init(&(c->cctx), block);
535 gost_key(&(c->cctx), key);
537 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
538 EVP_CIPHER_CTX_iv_length(ctx));
540 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
541 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
545 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
546 const unsigned char *iv, int enc)
548 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
551 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
552 const unsigned char *key,
553 const unsigned char *iv, int enc)
555 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
558 /* Initializes EVP_CIPHER_CTX with default values */
559 int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
560 const unsigned char *iv, int enc)
562 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
566 /* Initializes EVP_CIPHER_CTX with default values */
567 int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
568 const unsigned char *iv, int enc)
570 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
574 /* Initializes EVP_CIPHER_CTX with default values */
575 int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
576 const unsigned char *iv, int enc)
578 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
579 /* FIXME this is just initializtion check */
580 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
581 if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
583 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
586 if (init_zero_kdf_seed(c->kdf_seed) == 0)
592 magma_key(&(c->cctx), key);
594 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
595 EVP_CIPHER_CTX_iv_length(ctx));
597 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
598 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
600 if (EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm
601 || EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm_omac) {
602 c->key_meshing = 1024;
610 /* Initializes EVP_CIPHER_CTX with default values */
611 int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
612 const unsigned char *iv, int enc)
615 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
616 unsigned char cipher_key[32];
617 c->omac_ctx = EVP_MD_CTX_new();
619 if (c->omac_ctx == NULL) {
620 GOSTerr(GOST_F_MAGMA_CIPHER_INIT_CTR_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
624 if (gost2015_acpkm_omac_init(NID_magma_mac, enc, key,
625 c->omac_ctx, cipher_key, c->kdf_seed) != 1) {
626 EVP_MD_CTX_free(c->omac_ctx);
631 return magma_cipher_init(ctx, cipher_key, iv, enc);
634 return magma_cipher_init(ctx, key, iv, enc);
638 * Wrapper around gostcrypt function from gost89.c which perform key meshing
641 static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
643 struct ossl_gost_cipher_ctx *c = ctx;
644 assert(c->count % 8 == 0 && c->count <= 1024);
645 if (c->key_meshing && c->count == 1024) {
646 cryptopro_key_meshing(&(c->cctx), iv);
648 gostcrypt(&(c->cctx), iv, buf);
649 c->count = c->count % 1024 + 8;
652 static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
654 struct ossl_gost_cipher_ctx *c = ctx;
656 unsigned char buf1[8];
657 assert(c->count % 8 == 0 && c->count <= 1024);
658 if (c->key_meshing && c->count == 1024) {
659 cryptopro_key_meshing(&(c->cctx), iv);
662 gostcrypt(&(c->cctx), iv, buf1);
666 g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
668 buf1[0] = (unsigned char)(g & 0xff);
669 buf1[1] = (unsigned char)((g >> 8) & 0xff);
670 buf1[2] = (unsigned char)((g >> 16) & 0xff);
671 buf1[3] = (unsigned char)((g >> 24) & 0xff);
672 g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
675 if (go > g) /* overflow */
677 buf1[4] = (unsigned char)(g & 0xff);
678 buf1[5] = (unsigned char)((g >> 8) & 0xff);
679 buf1[6] = (unsigned char)((g >> 16) & 0xff);
680 buf1[7] = (unsigned char)((g >> 24) & 0xff);
682 gostcrypt(&(c->cctx), buf1, buf);
683 c->count = c->count % 1024 + 8;
686 /* GOST encryption in CBC mode */
687 int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
688 const unsigned char *in, size_t inl)
691 const unsigned char *in_ptr = in;
692 unsigned char *out_ptr = out;
694 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
695 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
696 if (EVP_CIPHER_CTX_encrypting(ctx)) {
699 for (i = 0; i < 8; i++) {
700 b[i] = iv[i] ^ in_ptr[i];
702 gostcrypt(&(c->cctx), b, out_ptr);
703 memcpy(iv, out_ptr, 8);
710 gostdecrypt(&(c->cctx), in_ptr, b);
711 for (i = 0; i < 8; i++) {
712 out_ptr[i] = iv[i] ^ b[i];
714 memcpy(iv, in_ptr, 8);
723 /* MAGMA encryption in CBC mode */
724 int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
725 const unsigned char *in, size_t inl)
729 const unsigned char *in_ptr = in;
730 unsigned char *out_ptr = out;
732 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
733 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
734 if (EVP_CIPHER_CTX_encrypting(ctx)) {
737 for (i = 0; i < 8; i++) {
738 b[7 - i] = iv[i] ^ in_ptr[i];
740 gostcrypt(&(c->cctx), b, d);
742 for (i = 0; i < 8; i++) {
743 out_ptr[7 - i] = d[i];
745 memcpy(iv, out_ptr, 8);
752 for (i = 0; i < 8; i++) {
753 d[7 - i] = in_ptr[i];
755 gostdecrypt(&(c->cctx), d, b);
756 memcpy(d, in_ptr, 8);
757 for (i = 0; i < 8; i++) {
758 out_ptr[i] = iv[i] ^ b[7 - i];
769 /* increment counter (64-bit int) by 1 */
770 static void ctr64_inc(unsigned char *counter)
772 inc_counter(counter, 8);
775 /* MAGMA encryption in CTR mode */
776 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
777 const unsigned char *in, size_t inl)
779 const unsigned char *in_ptr = in;
780 unsigned char *out_ptr = out;
783 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
784 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
785 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
787 /* Process partial blocks */
788 if (EVP_CIPHER_CTX_num(ctx)) {
789 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
790 j++, i++, in_ptr++, out_ptr++) {
791 *out_ptr = buf[7 - j] ^ (*in_ptr);
794 EVP_CIPHER_CTX_set_num(ctx, 0);
796 EVP_CIPHER_CTX_set_num(ctx, j);
801 /* Process full blocks */
802 for (; i + 8 <= inl; i += 8, in_ptr += 8, out_ptr += 8) {
803 for (j = 0; j < 8; j++) {
806 gostcrypt(&(c->cctx), b, buf);
807 for (j = 0; j < 8; j++) {
808 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
812 if (c->key_meshing && (c->count % c->key_meshing == 0))
813 acpkm_magma_key_meshing(&(c->cctx));
816 /* Process the rest of plaintext */
818 for (j = 0; j < 8; j++) {
821 gostcrypt(&(c->cctx), b, buf);
823 for (j = 0; i < inl; j++, i++) {
824 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
829 if (c->key_meshing && (c->count % c->key_meshing == 0))
830 acpkm_magma_key_meshing(&(c->cctx));
832 EVP_CIPHER_CTX_set_num(ctx, j);
834 EVP_CIPHER_CTX_set_num(ctx, 0);
840 /* MAGMA encryption in CTR mode */
841 static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
842 const unsigned char *in, size_t inl)
844 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
846 if (in == NULL && inl == 0) /* Final call */
847 return gost2015_final_call(ctx, c->omac_ctx, MAGMA_MAC_MAX_SIZE, c->tag, magma_cipher_do_ctr);
852 /* As in and out can be the same pointer, process unencrypted here */
853 if (EVP_CIPHER_CTX_encrypting(ctx))
854 EVP_DigestSignUpdate(c->omac_ctx, in, inl);
856 if (magma_cipher_do_ctr(ctx, out, in, inl) != inl)
859 /* As in and out can be the same pointer, process decrypted here */
860 if (!EVP_CIPHER_CTX_encrypting(ctx))
861 EVP_DigestSignUpdate(c->omac_ctx, out, inl);
865 /* GOST encryption in CFB mode */
866 int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
867 const unsigned char *in, size_t inl)
869 const unsigned char *in_ptr = in;
870 unsigned char *out_ptr = out;
873 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
874 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
875 /* process partial block if any */
876 if (EVP_CIPHER_CTX_num(ctx)) {
877 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
878 j++, i++, in_ptr++, out_ptr++) {
879 if (!EVP_CIPHER_CTX_encrypting(ctx))
880 buf[j + 8] = *in_ptr;
881 *out_ptr = buf[j] ^ (*in_ptr);
882 if (EVP_CIPHER_CTX_encrypting(ctx))
883 buf[j + 8] = *out_ptr;
886 memcpy(iv, buf + 8, 8);
887 EVP_CIPHER_CTX_set_num(ctx, 0);
889 EVP_CIPHER_CTX_set_num(ctx, j);
894 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
896 * block cipher current iv
898 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
900 * xor next block of input text with it and output it
905 if (!EVP_CIPHER_CTX_encrypting(ctx))
906 memcpy(iv, in_ptr, 8);
907 for (j = 0; j < 8; j++) {
908 out_ptr[j] = buf[j] ^ in_ptr[j];
911 /* Next iv is next block of cipher text */
912 if (EVP_CIPHER_CTX_encrypting(ctx))
913 memcpy(iv, out_ptr, 8);
915 /* Process rest of buffer */
917 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
918 if (!EVP_CIPHER_CTX_encrypting(ctx))
919 memcpy(buf + 8, in_ptr, inl - i);
920 for (j = 0; i < inl; j++, i++) {
921 out_ptr[j] = buf[j] ^ in_ptr[j];
923 EVP_CIPHER_CTX_set_num(ctx, j);
924 if (EVP_CIPHER_CTX_encrypting(ctx))
925 memcpy(buf + 8, out_ptr, j);
927 EVP_CIPHER_CTX_set_num(ctx, 0);
932 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
933 const unsigned char *in, size_t inl)
935 const unsigned char *in_ptr = in;
936 unsigned char *out_ptr = out;
939 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
940 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
941 /* process partial block if any */
942 if (EVP_CIPHER_CTX_num(ctx)) {
943 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
944 j++, i++, in_ptr++, out_ptr++) {
945 *out_ptr = buf[j] ^ (*in_ptr);
948 EVP_CIPHER_CTX_set_num(ctx, 0);
950 EVP_CIPHER_CTX_set_num(ctx, j);
955 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
957 * block cipher current iv
960 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
962 * xor next block of input text with it and output it
967 for (j = 0; j < 8; j++) {
968 out_ptr[j] = buf[j] ^ in_ptr[j];
971 /* Process rest of buffer */
973 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
974 for (j = 0; i < inl; j++, i++) {
975 out_ptr[j] = buf[j] ^ in_ptr[j];
977 EVP_CIPHER_CTX_set_num(ctx, j);
979 EVP_CIPHER_CTX_set_num(ctx, 0);
984 /* Cleaning up of EVP_CIPHER_CTX */
985 int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
987 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
988 EVP_MD_CTX_free(c->omac_ctx);
989 gost_destroy(&(c->cctx));
990 EVP_CIPHER_CTX_set_app_data(ctx, NULL);
994 /* Control function for gost cipher */
995 int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
998 case EVP_CTRL_RAND_KEY:
1001 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
1002 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
1007 case EVP_CTRL_PBE_PRF_NID:
1009 const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
1010 int nid = NID_id_tc26_hmac_gost_3411_2012_512;
1013 if (!strcmp("md_gost12_256", params))
1014 nid = NID_id_tc26_hmac_gost_3411_2012_256;
1015 else if (!strcmp("md_gost12_512", params))
1016 nid = NID_id_tc26_hmac_gost_3411_2012_512;
1017 else if (!strcmp("md_gost94", params))
1018 nid = NID_id_HMACGostR3411_94;
1020 *((int *)ptr) = nid;
1026 case EVP_CTRL_SET_SBOX:
1028 struct ossl_gost_cipher_ctx *c =
1029 EVP_CIPHER_CTX_get_cipher_data(ctx);
1038 if (c->count != 0) {
1042 nid = OBJ_txt2nid(ptr);
1043 if (nid == NID_undef) {
1047 cur_meshing = c->key_meshing;
1048 ret = gost_cipher_set_param(c, nid);
1049 c->key_meshing = cur_meshing;
1054 case EVP_CTRL_KEY_MESH:
1056 struct ossl_gost_cipher_ctx *c =
1057 EVP_CIPHER_CTX_get_cipher_data(ctx);
1063 if (c->count != 0) {
1067 c->key_meshing = arg;
1071 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1077 /* Control function for gost cipher */
1078 int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1081 case EVP_CTRL_RAND_KEY:
1083 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
1084 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
1088 case EVP_CTRL_KEY_MESH:
1090 struct ossl_gost_cipher_ctx *c =
1091 EVP_CIPHER_CTX_get_cipher_data(ctx);
1097 if (c->count != 0) {
1101 c->key_meshing = arg;
1105 GOSTerr(GOST_F_MAGMA_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1111 static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1115 case EVP_CTRL_PROCESS_UNPROTECTED:
1117 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1118 STACK_OF(X509_ATTRIBUTE) *x = ptr;
1119 return gost2015_process_unprotected_attributes(x, arg, MAGMA_MAC_MAX_SIZE, c->tag);
1121 case EVP_CTRL_COPY: {
1122 EVP_CIPHER_CTX *out = ptr;
1123 struct ossl_gost_cipher_ctx *in_cctx = EVP_CIPHER_CTX_get_cipher_data(ctx);
1124 struct ossl_gost_cipher_ctx *out_cctx = EVP_CIPHER_CTX_get_cipher_data(out);
1126 if (in_cctx->omac_ctx == out_cctx->omac_ctx) {
1127 out_cctx->omac_ctx = EVP_MD_CTX_new();
1128 if (out_cctx->omac_ctx == NULL) {
1129 GOSTerr(GOST_F_MAGMA_CIPHER_CTL_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
1133 return EVP_MD_CTX_copy(out_cctx->omac_ctx, in_cctx->omac_ctx);
1136 return magma_cipher_ctl(ctx, type, arg, ptr);
1141 /* Set cipher parameters from ASN1 structure */
1142 int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1145 unsigned char *buf = NULL;
1146 unsigned char *p = NULL;
1147 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1148 GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
1149 ASN1_OCTET_STRING *os = NULL;
1151 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1154 if (!ASN1_OCTET_STRING_set
1155 (gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
1156 GOST_CIPHER_PARAMS_free(gcp);
1157 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1160 ASN1_OBJECT_free(gcp->enc_param_set);
1161 gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
1163 len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
1164 p = buf = OPENSSL_malloc(len);
1166 GOST_CIPHER_PARAMS_free(gcp);
1167 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1170 i2d_GOST_CIPHER_PARAMS(gcp, &p);
1171 GOST_CIPHER_PARAMS_free(gcp);
1173 os = ASN1_OCTET_STRING_new();
1175 if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
1177 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1182 ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
1186 /* Store parameters into ASN1 structure */
1187 int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1190 GOST_CIPHER_PARAMS *gcp = NULL;
1192 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1195 if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
1199 p = params->value.sequence->data;
1201 gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
1202 params->value.sequence->length);
1204 len = gcp->iv->length;
1205 if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
1206 GOST_CIPHER_PARAMS_free(gcp);
1207 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
1211 nid = OBJ_obj2nid(gcp->enc_param_set);
1212 if (nid == NID_undef) {
1213 GOST_CIPHER_PARAMS_free(gcp);
1214 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
1215 GOST_R_INVALID_CIPHER_PARAM_OID);
1219 if (!gost_cipher_set_param(c, nid)) {
1220 GOST_CIPHER_PARAMS_free(gcp);
1223 /*XXX missing non-const accessor */
1224 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
1225 EVP_CIPHER_CTX_iv_length(ctx));
1227 GOST_CIPHER_PARAMS_free(gcp);
1232 #define MAGMA_UKM_LEN 12
1233 static int magma_set_asn1_parameters (EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1235 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1236 c->key_meshing = 8192;
1238 return gost2015_set_asn1_params(params, EVP_CIPHER_CTX_original_iv(ctx), 4,
1242 static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1244 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1245 unsigned char iv[16];
1247 c->key_meshing = 8192;
1249 if (gost2015_get_asn1_params(params, MAGMA_UKM_LEN, iv, 4, c->kdf_seed) < 0)
1252 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, sizeof(iv));
1253 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv, sizeof(iv));
1254 /* Key meshing 8 kb*/
1255 c->key_meshing = 8192;
1260 static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
1262 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1263 memset(c->buffer, 0, sizeof(c->buffer));
1264 memset(c->partial_block, 0, sizeof(c->partial_block));
1269 gost_init(&(c->cctx), block);
1273 static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
1275 return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
1278 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
1280 return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
1283 static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
1284 const unsigned char *data)
1287 * We are using NULL for iv because CryptoPro doesn't interpret
1288 * internal state of MAC algorithm as iv during keymeshing (but does
1289 * initialize internal state from iv in key transport
1291 assert(c->count % 8 == 0 && c->count <= 1024);
1292 if (c->key_meshing && c->count == 1024) {
1293 cryptopro_key_meshing(&(c->cctx), NULL);
1295 mac_block(&(c->cctx), c->buffer, data);
1296 c->count = c->count % 1024 + 8;
1299 int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
1301 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1302 const unsigned char *p = data;
1303 size_t bytes = count;
1304 if (!(c->key_set)) {
1305 GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
1308 if (c->bytes_left) {
1310 for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
1311 c->partial_block[i] = *p;
1314 mac_block_mesh(c, c->partial_block);
1321 mac_block_mesh(c, p);
1326 memcpy(c->partial_block, p, bytes);
1328 c->bytes_left = bytes;
1332 int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
1334 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1336 GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
1339 if (c->count == 0 && c->bytes_left) {
1340 unsigned char buffer[8];
1341 memset(buffer, 0, 8);
1342 gost_imit_update(ctx, buffer, 8);
1344 if (c->bytes_left) {
1346 for (i = c->bytes_left; i < 8; i++) {
1347 c->partial_block[i] = 0;
1349 mac_block_mesh(c, c->partial_block);
1351 get_mac(c->buffer, 8 * c->dgst_size, md);
1355 int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
1358 case EVP_MD_CTRL_KEY_LEN:
1359 *((unsigned int *)(ptr)) = 32;
1361 case EVP_MD_CTRL_SET_KEY:
1363 struct ossl_gost_imit_ctx *gost_imit_ctx = EVP_MD_CTX_md_data(ctx);
1365 if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
1366 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
1369 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
1372 struct gost_mac_key *key = (struct gost_mac_key *)ptr;
1373 if (key->mac_param_nid != NID_undef) {
1374 const struct gost_cipher_info *param =
1375 get_encryption_params(OBJ_nid2obj(key->mac_param_nid));
1376 if (param == NULL) {
1377 GOSTerr(GOST_F_GOST_IMIT_CTRL,
1378 GOST_R_INVALID_MAC_PARAMS);
1381 gost_init(&(gost_imit_ctx->cctx), param->sblock);
1383 gost_key(&(gost_imit_ctx->cctx), key->key);
1384 gost_imit_ctx->key_set = 1;
1387 } else if (arg == 32) {
1388 gost_key(&(gost_imit_ctx->cctx), ptr);
1389 gost_imit_ctx->key_set = 1;
1392 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
1395 case EVP_MD_CTRL_XOF_LEN:
1397 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1398 if (arg < 1 || arg > 8) {
1399 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
1411 int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
1413 if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
1414 memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
1415 sizeof(struct ossl_gost_imit_ctx));
1420 /* Clean up imit ctx */
1421 int gost_imit_cleanup(EVP_MD_CTX *ctx)
1423 memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));
1426 /* vim: set expandtab cinoptions=\:0,l1,t0,g0,(0 sw=4 : */