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 static EVP_CIPHER *_hidden_Gost28147_89_cbc = NULL;
123 const EVP_CIPHER *cipher_gost_cbc(void)
125 if (_hidden_Gost28147_89_cbc == NULL
126 && ((_hidden_Gost28147_89_cbc =
127 EVP_CIPHER_meth_new(NID_gost89_cbc, 8 /* block_size */ ,
128 32 /* key_size */ )) == NULL
129 || !EVP_CIPHER_meth_set_iv_length(_hidden_Gost28147_89_cbc, 8)
130 || !EVP_CIPHER_meth_set_flags(_hidden_Gost28147_89_cbc,
134 EVP_CIPH_ALWAYS_CALL_INIT)
135 || !EVP_CIPHER_meth_set_init(_hidden_Gost28147_89_cbc,
136 gost_cipher_init_cbc)
137 || !EVP_CIPHER_meth_set_do_cipher(_hidden_Gost28147_89_cbc,
139 || !EVP_CIPHER_meth_set_cleanup(_hidden_Gost28147_89_cbc,
141 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_Gost28147_89_cbc,
143 ossl_gost_cipher_ctx))
144 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_Gost28147_89_cbc,
145 gost89_set_asn1_parameters)
146 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_Gost28147_89_cbc,
147 gost89_get_asn1_parameters)
148 || !EVP_CIPHER_meth_set_ctrl(_hidden_Gost28147_89_cbc,
150 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cbc);
151 _hidden_Gost28147_89_cbc = NULL;
153 return _hidden_Gost28147_89_cbc;
156 static EVP_CIPHER *_hidden_gost89_cnt = NULL;
157 const EVP_CIPHER *cipher_gost_cpacnt(void)
159 if (_hidden_gost89_cnt == NULL
160 && ((_hidden_gost89_cnt =
161 EVP_CIPHER_meth_new(NID_gost89_cnt, 1 /* block_size */ ,
162 32 /* key_size */ )) == NULL
163 || !EVP_CIPHER_meth_set_iv_length(_hidden_gost89_cnt, 8)
164 || !EVP_CIPHER_meth_set_flags(_hidden_gost89_cnt,
166 EVP_CIPH_NO_PADDING |
169 EVP_CIPH_ALWAYS_CALL_INIT)
170 || !EVP_CIPHER_meth_set_init(_hidden_gost89_cnt,
171 gost_cipher_init_cpa)
172 || !EVP_CIPHER_meth_set_do_cipher(_hidden_gost89_cnt,
174 || !EVP_CIPHER_meth_set_cleanup(_hidden_gost89_cnt,
176 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_gost89_cnt,
178 ossl_gost_cipher_ctx))
179 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_gost89_cnt,
180 gost89_set_asn1_parameters)
181 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_gost89_cnt,
182 gost89_get_asn1_parameters)
183 || !EVP_CIPHER_meth_set_ctrl(_hidden_gost89_cnt, gost_cipher_ctl))) {
184 EVP_CIPHER_meth_free(_hidden_gost89_cnt);
185 _hidden_gost89_cnt = NULL;
187 return _hidden_gost89_cnt;
190 static EVP_CIPHER *_hidden_gost89_cnt_12 = NULL;
191 const EVP_CIPHER *cipher_gost_cpcnt_12(void)
193 if (_hidden_gost89_cnt_12 == NULL
194 && ((_hidden_gost89_cnt_12 =
195 EVP_CIPHER_meth_new(NID_gost89_cnt_12, 1 /* block_size */ ,
196 32 /* key_size */ )) == NULL
197 || !EVP_CIPHER_meth_set_iv_length(_hidden_gost89_cnt_12, 8)
198 || !EVP_CIPHER_meth_set_flags(_hidden_gost89_cnt_12,
200 EVP_CIPH_NO_PADDING |
203 EVP_CIPH_ALWAYS_CALL_INIT)
204 || !EVP_CIPHER_meth_set_init(_hidden_gost89_cnt_12,
205 gost_cipher_init_cp_12)
206 || !EVP_CIPHER_meth_set_do_cipher(_hidden_gost89_cnt_12,
208 || !EVP_CIPHER_meth_set_cleanup(_hidden_gost89_cnt_12,
210 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_gost89_cnt_12,
212 ossl_gost_cipher_ctx))
213 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_gost89_cnt_12,
214 gost89_set_asn1_parameters)
215 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_gost89_cnt_12,
216 gost89_get_asn1_parameters)
217 || !EVP_CIPHER_meth_set_ctrl(_hidden_gost89_cnt_12,
219 EVP_CIPHER_meth_free(_hidden_gost89_cnt_12);
220 _hidden_gost89_cnt_12 = NULL;
222 return _hidden_gost89_cnt_12;
225 static EVP_CIPHER *_hidden_magma_ctr = NULL;
226 const EVP_CIPHER *cipher_magma_ctr(void)
228 if (_hidden_magma_ctr == NULL
229 && ((_hidden_magma_ctr =
230 EVP_CIPHER_meth_new(NID_magma_ctr, 1 /* block_size */ ,
231 32 /* key_size */ )) == NULL
232 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr, 4)
233 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr,
235 EVP_CIPH_NO_PADDING |
238 EVP_CIPH_ALWAYS_CALL_INIT)
239 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr, magma_cipher_init)
240 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr,
242 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr,
244 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr,
246 ossl_gost_cipher_ctx))
247 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr,
248 magma_set_asn1_parameters)
249 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr,
250 magma_get_asn1_parameters)
251 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr, magma_cipher_ctl))) {
252 EVP_CIPHER_meth_free(_hidden_magma_ctr);
253 _hidden_magma_ctr = NULL;
255 return _hidden_magma_ctr;
258 static EVP_CIPHER *_hidden_magma_ctr_acpkm = NULL;
259 const EVP_CIPHER *cipher_magma_ctr_acpkm(void)
261 if (_hidden_magma_ctr_acpkm == NULL
262 && ((_hidden_magma_ctr_acpkm =
263 EVP_CIPHER_meth_new(NID_magma_ctr_acpkm, 1 /* block_size */ ,
264 32 /* key_size */ )) == NULL
265 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr_acpkm, 4)
266 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr_acpkm,
268 EVP_CIPH_NO_PADDING |
271 EVP_CIPH_ALWAYS_CALL_INIT)
272 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr_acpkm, magma_cipher_init)
273 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr_acpkm,
275 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr_acpkm,
277 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr_acpkm,
279 ossl_gost_cipher_ctx))
280 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr_acpkm,
281 magma_set_asn1_parameters)
282 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr_acpkm,
283 magma_get_asn1_parameters)
285 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr_acpkm, magma_cipher_ctl))) {
286 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm);
287 _hidden_magma_ctr_acpkm = NULL;
289 return _hidden_magma_ctr_acpkm;
292 static EVP_CIPHER *_hidden_magma_ctr_acpkm_omac = NULL;
293 const EVP_CIPHER *cipher_magma_ctr_acpkm_omac(void)
295 if (_hidden_magma_ctr_acpkm_omac == NULL
296 && ((_hidden_magma_ctr_acpkm_omac =
297 EVP_CIPHER_meth_new(NID_magma_ctr_acpkm_omac, 1 /* block_size */ ,
298 32 /* key_size */ )) == NULL
299 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr_acpkm_omac, 4)
300 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr_acpkm_omac,
302 EVP_CIPH_NO_PADDING |
305 EVP_CIPH_ALWAYS_CALL_INIT |
306 EVP_CIPH_CUSTOM_COPY |
307 EVP_CIPH_FLAG_CUSTOM_CIPHER |
308 EVP_CIPH_FLAG_CIPHER_WITH_MAC)
309 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr_acpkm_omac, magma_cipher_init_ctr_acpkm_omac)
310 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr_acpkm_omac,
311 magma_cipher_do_ctr_acpkm_omac)
312 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr_acpkm_omac,
314 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr_acpkm_omac,
316 ossl_gost_cipher_ctx))
317 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr_acpkm_omac,
318 magma_set_asn1_parameters)
319 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr_acpkm_omac,
320 magma_get_asn1_parameters)
321 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr_acpkm_omac, magma_cipher_ctl_acpkm_omac))) {
322 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm_omac);
323 _hidden_magma_ctr_acpkm_omac = NULL;
325 return _hidden_magma_ctr_acpkm_omac;
328 static EVP_CIPHER *_hidden_magma_cbc = NULL;
329 const EVP_CIPHER *cipher_magma_cbc(void)
331 if (_hidden_magma_cbc == NULL
332 && ((_hidden_magma_cbc =
333 EVP_CIPHER_meth_new(NID_magma_cbc, 8 /* block_size */ ,
334 32 /* key_size */ )) == NULL
335 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_cbc, 8)
336 || !EVP_CIPHER_meth_set_flags(_hidden_magma_cbc,
340 EVP_CIPH_ALWAYS_CALL_INIT)
341 || !EVP_CIPHER_meth_set_init(_hidden_magma_cbc, magma_cipher_init)
342 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_cbc,
344 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_cbc,
346 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_cbc,
348 ossl_gost_cipher_ctx))
349 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_cbc, magma_cipher_ctl))) {
350 EVP_CIPHER_meth_free(_hidden_magma_cbc);
351 _hidden_magma_cbc = NULL;
353 return _hidden_magma_cbc;
356 void cipher_gost_destroy(void)
358 //EVP_CIPHER_meth_free(_hidden_Gost28147_89_cipher);
359 //_hidden_Gost28147_89_cipher = NULL;
360 EVP_CIPHER_meth_free(_hidden_gost89_cnt);
361 _hidden_gost89_cnt = NULL;
362 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cbc);
363 _hidden_Gost28147_89_cbc = NULL;
364 EVP_CIPHER_meth_free(_hidden_gost89_cnt_12);
365 _hidden_gost89_cnt_12 = NULL;
366 EVP_CIPHER_meth_free(_hidden_magma_cbc);
367 _hidden_magma_cbc = NULL;
368 EVP_CIPHER_meth_free(_hidden_magma_ctr);
369 _hidden_magma_ctr = NULL;
370 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm);
371 _hidden_magma_ctr_acpkm = NULL;
372 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm_omac);
373 _hidden_magma_ctr_acpkm_omac = NULL;
376 /* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */
377 /* Init functions which set specific parameters */
378 static int gost_imit_init_cpa(EVP_MD_CTX *ctx);
379 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx);
380 /* process block of data */
381 static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count);
382 /* Return computed value */
383 static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md);
385 static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
386 static int gost_imit_cleanup(EVP_MD_CTX *ctx);
387 /* Control function, knows how to set MAC key.*/
388 static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr);
390 static EVP_MD *_hidden_Gost28147_89_MAC_md = NULL;
391 static EVP_MD *_hidden_Gost28147_89_12_MAC_md = NULL;
393 EVP_MD *imit_gost_cpa(void)
395 if (_hidden_Gost28147_89_MAC_md == NULL) {
398 if ((md = EVP_MD_meth_new(NID_id_Gost28147_89_MAC, NID_undef)) == NULL
399 || !EVP_MD_meth_set_result_size(md, 4)
400 || !EVP_MD_meth_set_input_blocksize(md, 8)
401 || !EVP_MD_meth_set_app_datasize(md,
402 sizeof(struct ossl_gost_imit_ctx))
403 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
404 || !EVP_MD_meth_set_init(md, gost_imit_init_cpa)
405 || !EVP_MD_meth_set_update(md, gost_imit_update)
406 || !EVP_MD_meth_set_final(md, gost_imit_final)
407 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
408 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
409 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
410 EVP_MD_meth_free(md);
413 _hidden_Gost28147_89_MAC_md = md;
415 return _hidden_Gost28147_89_MAC_md;
418 void imit_gost_cpa_destroy(void)
420 EVP_MD_meth_free(_hidden_Gost28147_89_MAC_md);
421 _hidden_Gost28147_89_MAC_md = NULL;
424 EVP_MD *imit_gost_cp_12(void)
426 if (_hidden_Gost28147_89_12_MAC_md == NULL) {
429 if ((md = EVP_MD_meth_new(NID_gost_mac_12, NID_undef)) == NULL
430 || !EVP_MD_meth_set_result_size(md, 4)
431 || !EVP_MD_meth_set_input_blocksize(md, 8)
432 || !EVP_MD_meth_set_app_datasize(md,
433 sizeof(struct ossl_gost_imit_ctx))
434 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
435 || !EVP_MD_meth_set_init(md, gost_imit_init_cp_12)
436 || !EVP_MD_meth_set_update(md, gost_imit_update)
437 || !EVP_MD_meth_set_final(md, gost_imit_final)
438 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
439 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
440 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
441 EVP_MD_meth_free(md);
444 _hidden_Gost28147_89_12_MAC_md = md;
446 return _hidden_Gost28147_89_12_MAC_md;
449 void imit_gost_cp_12_destroy(void)
451 EVP_MD_meth_free(_hidden_Gost28147_89_12_MAC_md);
452 _hidden_Gost28147_89_12_MAC_md = NULL;
456 * Correspondence between gost parameter OIDs and substitution blocks
457 * NID field is filed by register_gost_NID function in engine.c
458 * upon engine initialization
461 struct gost_cipher_info gost_cipher_list[] = {
468 * {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
470 {NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
472 {NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
474 {NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
476 {NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
478 {NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
479 {NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
484 * get encryption parameters from crypto network settings FIXME For now we
485 * use environment var CRYPT_PARAMS as place to store these settings.
486 * Actually, it is better to use engine control command, read from
487 * configuration file to set them
489 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
492 struct gost_cipher_info *param;
494 const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
495 if (!params || !strlen(params)) {
497 for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
498 if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
499 return &gost_cipher_list[i];
500 return &gost_cipher_list[0];
503 nid = OBJ_txt2nid(params);
504 if (nid == NID_undef) {
505 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
506 GOST_R_INVALID_CIPHER_PARAM_OID);
507 ERR_add_error_data(3, "Unsupported CRYPT_PARAMS='",
508 params, "' specified in environment or in config");
512 nid = OBJ_obj2nid(obj);
514 for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
516 if (!param->sblock) {
517 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
523 /* Sets cipher param from paramset NID. */
524 static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
526 const struct gost_cipher_info *param;
527 param = get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
531 c->paramNID = param->nid;
532 c->key_meshing = param->key_meshing;
534 gost_init(&(c->cctx), param->sblock);
538 /* Initializes EVP_CIPHER_CTX by paramset NID */
539 static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
540 const unsigned char *key,
541 const unsigned char *iv, int enc,
542 int paramNID, int mode)
544 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
545 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
546 if (!gost_cipher_set_param(c, paramNID))
548 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
551 gost_key(&(c->cctx), key);
553 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
554 EVP_CIPHER_CTX_iv_length(ctx));
556 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
557 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
561 static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
562 const unsigned char *key,
563 const unsigned char *iv,
564 gost_subst_block * block)
566 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
567 gost_init(&(c->cctx), block);
571 gost_key(&(c->cctx), key);
573 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
574 EVP_CIPHER_CTX_iv_length(ctx));
576 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
577 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
581 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
582 const unsigned char *iv, int enc)
584 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
587 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
588 const unsigned char *key,
589 const unsigned char *iv, int enc)
591 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
594 /* Initializes EVP_CIPHER_CTX with default values */
595 int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
596 const unsigned char *iv, int enc)
598 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
602 /* Initializes EVP_CIPHER_CTX with default values */
603 int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
604 const unsigned char *iv, int enc)
606 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
610 /* Initializes EVP_CIPHER_CTX with default values */
611 int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
612 const unsigned char *iv, int enc)
614 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
615 /* FIXME this is just initializtion check */
616 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
617 if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
619 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
622 if (init_zero_kdf_seed(c->kdf_seed) == 0)
628 magma_key(&(c->cctx), key);
630 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
631 EVP_CIPHER_CTX_iv_length(ctx));
633 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
634 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
636 if (EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm
637 || EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm_omac) {
638 c->key_meshing = 1024;
646 /* Initializes EVP_CIPHER_CTX with default values */
647 int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
648 const unsigned char *iv, int enc)
651 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
652 unsigned char cipher_key[32];
653 c->omac_ctx = EVP_MD_CTX_new();
655 if (c->omac_ctx == NULL) {
656 GOSTerr(GOST_F_MAGMA_CIPHER_INIT_CTR_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
660 if (gost2015_acpkm_omac_init(NID_magma_mac, enc, key,
661 c->omac_ctx, cipher_key, c->kdf_seed) != 1) {
662 EVP_MD_CTX_free(c->omac_ctx);
667 return magma_cipher_init(ctx, cipher_key, iv, enc);
670 return magma_cipher_init(ctx, key, iv, enc);
674 * Wrapper around gostcrypt function from gost89.c which perform key meshing
677 static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
679 struct ossl_gost_cipher_ctx *c = ctx;
680 assert(c->count % 8 == 0 && c->count <= 1024);
681 if (c->key_meshing && c->count == 1024) {
682 cryptopro_key_meshing(&(c->cctx), iv);
684 gostcrypt(&(c->cctx), iv, buf);
685 c->count = c->count % 1024 + 8;
688 static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
690 struct ossl_gost_cipher_ctx *c = ctx;
692 unsigned char buf1[8];
693 assert(c->count % 8 == 0 && c->count <= 1024);
694 if (c->key_meshing && c->count == 1024) {
695 cryptopro_key_meshing(&(c->cctx), iv);
698 gostcrypt(&(c->cctx), iv, buf1);
702 g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
704 buf1[0] = (unsigned char)(g & 0xff);
705 buf1[1] = (unsigned char)((g >> 8) & 0xff);
706 buf1[2] = (unsigned char)((g >> 16) & 0xff);
707 buf1[3] = (unsigned char)((g >> 24) & 0xff);
708 g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
711 if (go > g) /* overflow */
713 buf1[4] = (unsigned char)(g & 0xff);
714 buf1[5] = (unsigned char)((g >> 8) & 0xff);
715 buf1[6] = (unsigned char)((g >> 16) & 0xff);
716 buf1[7] = (unsigned char)((g >> 24) & 0xff);
718 gostcrypt(&(c->cctx), buf1, buf);
719 c->count = c->count % 1024 + 8;
722 /* GOST encryption in CBC mode */
723 int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
724 const unsigned char *in, size_t inl)
727 const unsigned char *in_ptr = in;
728 unsigned char *out_ptr = out;
730 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
731 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
732 if (EVP_CIPHER_CTX_encrypting(ctx)) {
735 for (i = 0; i < 8; i++) {
736 b[i] = iv[i] ^ in_ptr[i];
738 gostcrypt(&(c->cctx), b, out_ptr);
739 memcpy(iv, out_ptr, 8);
746 gostdecrypt(&(c->cctx), in_ptr, b);
747 for (i = 0; i < 8; i++) {
748 out_ptr[i] = iv[i] ^ b[i];
750 memcpy(iv, in_ptr, 8);
759 /* MAGMA encryption in CBC mode */
760 int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
761 const unsigned char *in, size_t inl)
765 const unsigned char *in_ptr = in;
766 unsigned char *out_ptr = out;
768 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
769 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
770 if (EVP_CIPHER_CTX_encrypting(ctx)) {
773 for (i = 0; i < 8; i++) {
774 b[7 - i] = iv[i] ^ in_ptr[i];
776 gostcrypt(&(c->cctx), b, d);
778 for (i = 0; i < 8; i++) {
779 out_ptr[7 - i] = d[i];
781 memcpy(iv, out_ptr, 8);
788 for (i = 0; i < 8; i++) {
789 d[7 - i] = in_ptr[i];
791 gostdecrypt(&(c->cctx), d, b);
792 memcpy(d, in_ptr, 8);
793 for (i = 0; i < 8; i++) {
794 out_ptr[i] = iv[i] ^ b[7 - i];
805 /* increment counter (64-bit int) by 1 */
806 static void ctr64_inc(unsigned char *counter)
808 inc_counter(counter, 8);
811 /* MAGMA encryption in CTR mode */
812 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
813 const unsigned char *in, size_t inl)
815 const unsigned char *in_ptr = in;
816 unsigned char *out_ptr = out;
819 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
820 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
821 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
823 /* Process partial blocks */
824 if (EVP_CIPHER_CTX_num(ctx)) {
825 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
826 j++, i++, in_ptr++, out_ptr++) {
827 *out_ptr = buf[7 - j] ^ (*in_ptr);
830 EVP_CIPHER_CTX_set_num(ctx, 0);
832 EVP_CIPHER_CTX_set_num(ctx, j);
837 /* Process full blocks */
838 for (; i + 8 <= inl; i += 8, in_ptr += 8, out_ptr += 8) {
839 for (j = 0; j < 8; j++) {
842 gostcrypt(&(c->cctx), b, buf);
843 for (j = 0; j < 8; j++) {
844 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
848 if (c->key_meshing && (c->count % c->key_meshing == 0))
849 acpkm_magma_key_meshing(&(c->cctx));
852 /* Process the rest of plaintext */
854 for (j = 0; j < 8; j++) {
857 gostcrypt(&(c->cctx), b, buf);
859 for (j = 0; i < inl; j++, i++) {
860 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
865 if (c->key_meshing && (c->count % c->key_meshing == 0))
866 acpkm_magma_key_meshing(&(c->cctx));
868 EVP_CIPHER_CTX_set_num(ctx, j);
870 EVP_CIPHER_CTX_set_num(ctx, 0);
876 /* MAGMA encryption in CTR mode */
877 static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
878 const unsigned char *in, size_t inl)
880 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
882 if (in == NULL && inl == 0) /* Final call */
883 return gost2015_final_call(ctx, c->omac_ctx, MAGMA_MAC_MAX_SIZE, c->tag, magma_cipher_do_ctr);
888 /* As in and out can be the same pointer, process unencrypted here */
889 if (EVP_CIPHER_CTX_encrypting(ctx))
890 EVP_DigestSignUpdate(c->omac_ctx, in, inl);
892 if (magma_cipher_do_ctr(ctx, out, in, inl) != inl)
895 /* As in and out can be the same pointer, process decrypted here */
896 if (!EVP_CIPHER_CTX_encrypting(ctx))
897 EVP_DigestSignUpdate(c->omac_ctx, out, inl);
901 /* GOST encryption in CFB mode */
902 int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
903 const unsigned char *in, size_t inl)
905 const unsigned char *in_ptr = in;
906 unsigned char *out_ptr = out;
909 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
910 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
911 /* process partial block if any */
912 if (EVP_CIPHER_CTX_num(ctx)) {
913 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
914 j++, i++, in_ptr++, out_ptr++) {
915 if (!EVP_CIPHER_CTX_encrypting(ctx))
916 buf[j + 8] = *in_ptr;
917 *out_ptr = buf[j] ^ (*in_ptr);
918 if (EVP_CIPHER_CTX_encrypting(ctx))
919 buf[j + 8] = *out_ptr;
922 memcpy(iv, buf + 8, 8);
923 EVP_CIPHER_CTX_set_num(ctx, 0);
925 EVP_CIPHER_CTX_set_num(ctx, j);
930 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
932 * block cipher current iv
934 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
936 * xor next block of input text with it and output it
941 if (!EVP_CIPHER_CTX_encrypting(ctx))
942 memcpy(iv, in_ptr, 8);
943 for (j = 0; j < 8; j++) {
944 out_ptr[j] = buf[j] ^ in_ptr[j];
947 /* Next iv is next block of cipher text */
948 if (EVP_CIPHER_CTX_encrypting(ctx))
949 memcpy(iv, out_ptr, 8);
951 /* Process rest of buffer */
953 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
954 if (!EVP_CIPHER_CTX_encrypting(ctx))
955 memcpy(buf + 8, in_ptr, inl - i);
956 for (j = 0; i < inl; j++, i++) {
957 out_ptr[j] = buf[j] ^ in_ptr[j];
959 EVP_CIPHER_CTX_set_num(ctx, j);
960 if (EVP_CIPHER_CTX_encrypting(ctx))
961 memcpy(buf + 8, out_ptr, j);
963 EVP_CIPHER_CTX_set_num(ctx, 0);
968 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
969 const unsigned char *in, size_t inl)
971 const unsigned char *in_ptr = in;
972 unsigned char *out_ptr = out;
975 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
976 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
977 /* process partial block if any */
978 if (EVP_CIPHER_CTX_num(ctx)) {
979 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
980 j++, i++, in_ptr++, out_ptr++) {
981 *out_ptr = buf[j] ^ (*in_ptr);
984 EVP_CIPHER_CTX_set_num(ctx, 0);
986 EVP_CIPHER_CTX_set_num(ctx, j);
991 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
993 * block cipher current iv
996 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
998 * xor next block of input text with it and output it
1003 for (j = 0; j < 8; j++) {
1004 out_ptr[j] = buf[j] ^ in_ptr[j];
1007 /* Process rest of buffer */
1009 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
1010 for (j = 0; i < inl; j++, i++) {
1011 out_ptr[j] = buf[j] ^ in_ptr[j];
1013 EVP_CIPHER_CTX_set_num(ctx, j);
1015 EVP_CIPHER_CTX_set_num(ctx, 0);
1020 /* Cleaning up of EVP_CIPHER_CTX */
1021 int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
1023 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1024 EVP_MD_CTX_free(c->omac_ctx);
1025 gost_destroy(&(c->cctx));
1026 EVP_CIPHER_CTX_set_app_data(ctx, NULL);
1030 /* Control function for gost cipher */
1031 int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1034 case EVP_CTRL_RAND_KEY:
1037 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
1038 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
1043 case EVP_CTRL_PBE_PRF_NID:
1045 const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
1046 int nid = NID_id_tc26_hmac_gost_3411_2012_512;
1049 if (!strcmp("md_gost12_256", params))
1050 nid = NID_id_tc26_hmac_gost_3411_2012_256;
1051 else if (!strcmp("md_gost12_512", params))
1052 nid = NID_id_tc26_hmac_gost_3411_2012_512;
1053 else if (!strcmp("md_gost94", params))
1054 nid = NID_id_HMACGostR3411_94;
1056 *((int *)ptr) = nid;
1062 case EVP_CTRL_SET_SBOX:
1064 struct ossl_gost_cipher_ctx *c =
1065 EVP_CIPHER_CTX_get_cipher_data(ctx);
1074 if (c->count != 0) {
1078 nid = OBJ_txt2nid(ptr);
1079 if (nid == NID_undef) {
1083 cur_meshing = c->key_meshing;
1084 ret = gost_cipher_set_param(c, nid);
1085 c->key_meshing = cur_meshing;
1090 case EVP_CTRL_KEY_MESH:
1092 struct ossl_gost_cipher_ctx *c =
1093 EVP_CIPHER_CTX_get_cipher_data(ctx);
1099 if (c->count != 0) {
1103 c->key_meshing = arg;
1107 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1113 /* Control function for gost cipher */
1114 int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1117 case EVP_CTRL_RAND_KEY:
1119 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
1120 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
1124 case EVP_CTRL_KEY_MESH:
1126 struct ossl_gost_cipher_ctx *c =
1127 EVP_CIPHER_CTX_get_cipher_data(ctx);
1133 if (c->count != 0) {
1137 c->key_meshing = arg;
1141 GOSTerr(GOST_F_MAGMA_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1147 static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1151 case EVP_CTRL_PROCESS_UNPROTECTED:
1153 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1154 STACK_OF(X509_ATTRIBUTE) *x = ptr;
1155 return gost2015_process_unprotected_attributes(x, arg, MAGMA_MAC_MAX_SIZE, c->tag);
1157 case EVP_CTRL_COPY: {
1158 EVP_CIPHER_CTX *out = ptr;
1159 struct ossl_gost_cipher_ctx *in_cctx = EVP_CIPHER_CTX_get_cipher_data(ctx);
1160 struct ossl_gost_cipher_ctx *out_cctx = EVP_CIPHER_CTX_get_cipher_data(out);
1162 if (in_cctx->omac_ctx == out_cctx->omac_ctx) {
1163 out_cctx->omac_ctx = EVP_MD_CTX_new();
1164 if (out_cctx->omac_ctx == NULL) {
1165 GOSTerr(GOST_F_MAGMA_CIPHER_CTL_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
1169 return EVP_MD_CTX_copy(out_cctx->omac_ctx, in_cctx->omac_ctx);
1172 return magma_cipher_ctl(ctx, type, arg, ptr);
1177 /* Set cipher parameters from ASN1 structure */
1178 int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1181 unsigned char *buf = NULL;
1182 unsigned char *p = NULL;
1183 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1184 GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
1185 ASN1_OCTET_STRING *os = NULL;
1187 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1190 if (!ASN1_OCTET_STRING_set
1191 (gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
1192 GOST_CIPHER_PARAMS_free(gcp);
1193 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1196 ASN1_OBJECT_free(gcp->enc_param_set);
1197 gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
1199 len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
1200 p = buf = OPENSSL_malloc(len);
1202 GOST_CIPHER_PARAMS_free(gcp);
1203 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1206 i2d_GOST_CIPHER_PARAMS(gcp, &p);
1207 GOST_CIPHER_PARAMS_free(gcp);
1209 os = ASN1_OCTET_STRING_new();
1211 if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
1213 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1218 ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
1222 /* Store parameters into ASN1 structure */
1223 int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1226 GOST_CIPHER_PARAMS *gcp = NULL;
1228 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1231 if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
1235 p = params->value.sequence->data;
1237 gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
1238 params->value.sequence->length);
1240 len = gcp->iv->length;
1241 if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
1242 GOST_CIPHER_PARAMS_free(gcp);
1243 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
1247 nid = OBJ_obj2nid(gcp->enc_param_set);
1248 if (nid == NID_undef) {
1249 GOST_CIPHER_PARAMS_free(gcp);
1250 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
1251 GOST_R_INVALID_CIPHER_PARAM_OID);
1255 if (!gost_cipher_set_param(c, nid)) {
1256 GOST_CIPHER_PARAMS_free(gcp);
1259 /*XXX missing non-const accessor */
1260 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
1261 EVP_CIPHER_CTX_iv_length(ctx));
1263 GOST_CIPHER_PARAMS_free(gcp);
1268 #define MAGMA_UKM_LEN 12
1269 static int magma_set_asn1_parameters (EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1271 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1272 c->key_meshing = 8192;
1274 return gost2015_set_asn1_params(params, EVP_CIPHER_CTX_original_iv(ctx), 4,
1278 static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1280 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1281 unsigned char iv[16];
1283 c->key_meshing = 8192;
1285 if (gost2015_get_asn1_params(params, MAGMA_UKM_LEN, iv, 4, c->kdf_seed) < 0)
1288 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, sizeof(iv));
1289 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv, sizeof(iv));
1290 /* Key meshing 8 kb*/
1291 c->key_meshing = 8192;
1296 static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
1298 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1299 memset(c->buffer, 0, sizeof(c->buffer));
1300 memset(c->partial_block, 0, sizeof(c->partial_block));
1305 gost_init(&(c->cctx), block);
1309 static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
1311 return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
1314 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
1316 return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
1319 static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
1320 const unsigned char *data)
1323 * We are using NULL for iv because CryptoPro doesn't interpret
1324 * internal state of MAC algorithm as iv during keymeshing (but does
1325 * initialize internal state from iv in key transport
1327 assert(c->count % 8 == 0 && c->count <= 1024);
1328 if (c->key_meshing && c->count == 1024) {
1329 cryptopro_key_meshing(&(c->cctx), NULL);
1331 mac_block(&(c->cctx), c->buffer, data);
1332 c->count = c->count % 1024 + 8;
1335 int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
1337 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1338 const unsigned char *p = data;
1339 size_t bytes = count;
1340 if (!(c->key_set)) {
1341 GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
1344 if (c->bytes_left) {
1346 for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
1347 c->partial_block[i] = *p;
1350 mac_block_mesh(c, c->partial_block);
1357 mac_block_mesh(c, p);
1362 memcpy(c->partial_block, p, bytes);
1364 c->bytes_left = bytes;
1368 int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
1370 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1372 GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
1375 if (c->count == 0 && c->bytes_left) {
1376 unsigned char buffer[8];
1377 memset(buffer, 0, 8);
1378 gost_imit_update(ctx, buffer, 8);
1380 if (c->bytes_left) {
1382 for (i = c->bytes_left; i < 8; i++) {
1383 c->partial_block[i] = 0;
1385 mac_block_mesh(c, c->partial_block);
1387 get_mac(c->buffer, 8 * c->dgst_size, md);
1391 int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
1394 case EVP_MD_CTRL_KEY_LEN:
1395 *((unsigned int *)(ptr)) = 32;
1397 case EVP_MD_CTRL_SET_KEY:
1399 struct ossl_gost_imit_ctx *gost_imit_ctx = EVP_MD_CTX_md_data(ctx);
1401 if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
1402 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
1405 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
1408 struct gost_mac_key *key = (struct gost_mac_key *)ptr;
1409 if (key->mac_param_nid != NID_undef) {
1410 const struct gost_cipher_info *param =
1411 get_encryption_params(OBJ_nid2obj(key->mac_param_nid));
1412 if (param == NULL) {
1413 GOSTerr(GOST_F_GOST_IMIT_CTRL,
1414 GOST_R_INVALID_MAC_PARAMS);
1417 gost_init(&(gost_imit_ctx->cctx), param->sblock);
1419 gost_key(&(gost_imit_ctx->cctx), key->key);
1420 gost_imit_ctx->key_set = 1;
1423 } else if (arg == 32) {
1424 gost_key(&(gost_imit_ctx->cctx), ptr);
1425 gost_imit_ctx->key_set = 1;
1428 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
1431 case EVP_MD_CTRL_XOF_LEN:
1433 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1434 if (arg < 1 || arg > 8) {
1435 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
1447 int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
1449 if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
1450 memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
1451 sizeof(struct ossl_gost_imit_ctx));
1456 /* Clean up imit ctx */
1457 int gost_imit_cleanup(EVP_MD_CTX *ctx)
1459 memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));
1462 /* vim: set expandtab cinoptions=\:0,l1,t0,g0,(0 sw=4 : */