1 /**********************************************************************
3 * Copyright (c) 2005-2006 Cryptocom LTD *
4 * This file is distributed under the same license as OpenSSL *
6 * OpenSSL interface to GOST 28147-89 cipher functions *
7 * Requires OpenSSL 0.9.9 for compilation *
8 **********************************************************************/
11 #include <openssl/err.h>
12 #include <openssl/rand.h>
13 #include "e_gost_err.h"
15 #include "gost_gost2015.h"
17 #if !defined(CCGOST_DEBUG) && !defined(DEBUG)
24 static int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
25 const unsigned char *iv, int enc);
26 static int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
27 const unsigned char *iv, int enc);
28 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
29 const unsigned char *iv, int enc);
30 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
31 const unsigned char *key,
32 const unsigned char *iv, int enc);
33 /* Handles block of data in CFB mode */
34 static int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
35 const unsigned char *in, size_t inl);
36 /* Handles block of data in CBC mode */
37 static int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
38 const unsigned char *in, size_t inl);
39 /* Handles block of data in CNT mode */
40 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
41 const unsigned char *in, size_t inl);
42 /* Cleanup function */
43 static int gost_cipher_cleanup(EVP_CIPHER_CTX *);
44 /* set/get cipher parameters */
45 static int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
46 static int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
47 /* Control function */
48 static int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
50 static int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
51 const unsigned char *iv, int enc);
52 static int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
53 const unsigned char *iv, int enc);
54 /* Handles block of data in CBC mode */
55 static int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
56 const unsigned char *in, size_t inl);
57 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
58 const unsigned char *in, size_t inl);
60 static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
61 const unsigned char *in, size_t inl);
63 /* set/get cipher parameters */
64 static int magma_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
65 static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
66 /* Control function */
67 static int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
68 static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
70 static EVP_CIPHER *_hidden_Gost28147_89_cipher = NULL;
71 const EVP_CIPHER *cipher_gost(void)
73 if (_hidden_Gost28147_89_cipher == NULL
74 && ((_hidden_Gost28147_89_cipher =
75 EVP_CIPHER_meth_new(NID_id_Gost28147_89, 1 /* block_size */ ,
76 32 /* key_size */ )) == NULL
77 || !EVP_CIPHER_meth_set_iv_length(_hidden_Gost28147_89_cipher, 8)
78 || !EVP_CIPHER_meth_set_flags(_hidden_Gost28147_89_cipher,
83 EVP_CIPH_ALWAYS_CALL_INIT)
84 || !EVP_CIPHER_meth_set_init(_hidden_Gost28147_89_cipher,
86 || !EVP_CIPHER_meth_set_do_cipher(_hidden_Gost28147_89_cipher,
88 || !EVP_CIPHER_meth_set_cleanup(_hidden_Gost28147_89_cipher,
90 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_Gost28147_89_cipher,
92 ossl_gost_cipher_ctx))
94 !EVP_CIPHER_meth_set_set_asn1_params(_hidden_Gost28147_89_cipher,
95 gost89_set_asn1_parameters)
97 !EVP_CIPHER_meth_set_get_asn1_params(_hidden_Gost28147_89_cipher,
98 gost89_get_asn1_parameters)
99 || !EVP_CIPHER_meth_set_ctrl(_hidden_Gost28147_89_cipher,
101 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cipher);
102 _hidden_Gost28147_89_cipher = NULL;
104 return _hidden_Gost28147_89_cipher;
107 static EVP_CIPHER *_hidden_Gost28147_89_cbc = NULL;
108 const EVP_CIPHER *cipher_gost_cbc(void)
110 if (_hidden_Gost28147_89_cbc == NULL
111 && ((_hidden_Gost28147_89_cbc =
112 EVP_CIPHER_meth_new(NID_gost89_cbc, 8 /* block_size */ ,
113 32 /* key_size */ )) == NULL
114 || !EVP_CIPHER_meth_set_iv_length(_hidden_Gost28147_89_cbc, 8)
115 || !EVP_CIPHER_meth_set_flags(_hidden_Gost28147_89_cbc,
119 EVP_CIPH_ALWAYS_CALL_INIT)
120 || !EVP_CIPHER_meth_set_init(_hidden_Gost28147_89_cbc,
121 gost_cipher_init_cbc)
122 || !EVP_CIPHER_meth_set_do_cipher(_hidden_Gost28147_89_cbc,
124 || !EVP_CIPHER_meth_set_cleanup(_hidden_Gost28147_89_cbc,
126 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_Gost28147_89_cbc,
128 ossl_gost_cipher_ctx))
129 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_Gost28147_89_cbc,
130 gost89_set_asn1_parameters)
131 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_Gost28147_89_cbc,
132 gost89_get_asn1_parameters)
133 || !EVP_CIPHER_meth_set_ctrl(_hidden_Gost28147_89_cbc,
135 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cbc);
136 _hidden_Gost28147_89_cbc = NULL;
138 return _hidden_Gost28147_89_cbc;
141 static EVP_CIPHER *_hidden_gost89_cnt = NULL;
142 const EVP_CIPHER *cipher_gost_cpacnt(void)
144 if (_hidden_gost89_cnt == NULL
145 && ((_hidden_gost89_cnt =
146 EVP_CIPHER_meth_new(NID_gost89_cnt, 1 /* block_size */ ,
147 32 /* key_size */ )) == NULL
148 || !EVP_CIPHER_meth_set_iv_length(_hidden_gost89_cnt, 8)
149 || !EVP_CIPHER_meth_set_flags(_hidden_gost89_cnt,
151 EVP_CIPH_NO_PADDING |
154 EVP_CIPH_ALWAYS_CALL_INIT)
155 || !EVP_CIPHER_meth_set_init(_hidden_gost89_cnt,
156 gost_cipher_init_cpa)
157 || !EVP_CIPHER_meth_set_do_cipher(_hidden_gost89_cnt,
159 || !EVP_CIPHER_meth_set_cleanup(_hidden_gost89_cnt,
161 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_gost89_cnt,
163 ossl_gost_cipher_ctx))
164 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_gost89_cnt,
165 gost89_set_asn1_parameters)
166 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_gost89_cnt,
167 gost89_get_asn1_parameters)
168 || !EVP_CIPHER_meth_set_ctrl(_hidden_gost89_cnt, gost_cipher_ctl))) {
169 EVP_CIPHER_meth_free(_hidden_gost89_cnt);
170 _hidden_gost89_cnt = NULL;
172 return _hidden_gost89_cnt;
175 static EVP_CIPHER *_hidden_gost89_cnt_12 = NULL;
176 const EVP_CIPHER *cipher_gost_cpcnt_12(void)
178 if (_hidden_gost89_cnt_12 == NULL
179 && ((_hidden_gost89_cnt_12 =
180 EVP_CIPHER_meth_new(NID_gost89_cnt_12, 1 /* block_size */ ,
181 32 /* key_size */ )) == NULL
182 || !EVP_CIPHER_meth_set_iv_length(_hidden_gost89_cnt_12, 8)
183 || !EVP_CIPHER_meth_set_flags(_hidden_gost89_cnt_12,
185 EVP_CIPH_NO_PADDING |
188 EVP_CIPH_ALWAYS_CALL_INIT)
189 || !EVP_CIPHER_meth_set_init(_hidden_gost89_cnt_12,
190 gost_cipher_init_cp_12)
191 || !EVP_CIPHER_meth_set_do_cipher(_hidden_gost89_cnt_12,
193 || !EVP_CIPHER_meth_set_cleanup(_hidden_gost89_cnt_12,
195 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_gost89_cnt_12,
197 ossl_gost_cipher_ctx))
198 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_gost89_cnt_12,
199 gost89_set_asn1_parameters)
200 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_gost89_cnt_12,
201 gost89_get_asn1_parameters)
202 || !EVP_CIPHER_meth_set_ctrl(_hidden_gost89_cnt_12,
204 EVP_CIPHER_meth_free(_hidden_gost89_cnt_12);
205 _hidden_gost89_cnt_12 = NULL;
207 return _hidden_gost89_cnt_12;
210 static EVP_CIPHER *_hidden_magma_ctr = NULL;
211 const EVP_CIPHER *cipher_magma_ctr(void)
213 if (_hidden_magma_ctr == NULL
214 && ((_hidden_magma_ctr =
215 EVP_CIPHER_meth_new(NID_magma_ctr, 1 /* block_size */ ,
216 32 /* key_size */ )) == NULL
217 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr, 4)
218 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr,
220 EVP_CIPH_NO_PADDING |
223 EVP_CIPH_ALWAYS_CALL_INIT)
224 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr, magma_cipher_init)
225 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr,
227 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr,
229 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr,
231 ossl_gost_cipher_ctx))
232 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr,
233 magma_set_asn1_parameters)
234 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr,
235 magma_get_asn1_parameters)
236 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr, magma_cipher_ctl))) {
237 EVP_CIPHER_meth_free(_hidden_magma_ctr);
238 _hidden_magma_ctr = NULL;
240 return _hidden_magma_ctr;
243 static EVP_CIPHER *_hidden_magma_ctr_acpkm = NULL;
244 const EVP_CIPHER *cipher_magma_ctr_acpkm(void)
246 if (_hidden_magma_ctr_acpkm == NULL
247 && ((_hidden_magma_ctr_acpkm =
248 EVP_CIPHER_meth_new(NID_magma_ctr_acpkm, 1 /* block_size */ ,
249 32 /* key_size */ )) == NULL
250 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr_acpkm, 4)
251 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr_acpkm,
253 EVP_CIPH_NO_PADDING |
256 EVP_CIPH_ALWAYS_CALL_INIT)
257 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr_acpkm, magma_cipher_init)
258 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr_acpkm,
260 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr_acpkm,
262 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr_acpkm,
264 ossl_gost_cipher_ctx))
265 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr_acpkm,
266 magma_set_asn1_parameters)
267 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr_acpkm,
268 magma_get_asn1_parameters)
270 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr_acpkm, magma_cipher_ctl))) {
271 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm);
272 _hidden_magma_ctr_acpkm = NULL;
274 return _hidden_magma_ctr_acpkm;
277 static EVP_CIPHER *_hidden_magma_ctr_acpkm_omac = NULL;
278 const EVP_CIPHER *cipher_magma_ctr_acpkm_omac(void)
280 if (_hidden_magma_ctr_acpkm_omac == NULL
281 && ((_hidden_magma_ctr_acpkm_omac =
282 EVP_CIPHER_meth_new(NID_magma_ctr_acpkm_omac, 1 /* block_size */ ,
283 32 /* key_size */ )) == NULL
284 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr_acpkm_omac, 4)
285 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr_acpkm_omac,
287 EVP_CIPH_NO_PADDING |
290 EVP_CIPH_ALWAYS_CALL_INIT |
291 EVP_CIPH_CUSTOM_COPY |
292 EVP_CIPH_FLAG_CUSTOM_CIPHER |
293 EVP_CIPH_FLAG_CIPHER_WITH_MAC)
294 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr_acpkm_omac, magma_cipher_init_ctr_acpkm_omac)
295 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr_acpkm_omac,
296 magma_cipher_do_ctr_acpkm_omac)
297 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr_acpkm_omac,
299 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr_acpkm_omac,
301 ossl_gost_cipher_ctx))
302 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr_acpkm_omac,
303 magma_set_asn1_parameters)
304 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr_acpkm_omac,
305 magma_get_asn1_parameters)
306 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr_acpkm_omac, magma_cipher_ctl_acpkm_omac))) {
307 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm_omac);
308 _hidden_magma_ctr_acpkm_omac = NULL;
310 return _hidden_magma_ctr_acpkm_omac;
313 static EVP_CIPHER *_hidden_magma_cbc = NULL;
314 const EVP_CIPHER *cipher_magma_cbc(void)
316 if (_hidden_magma_cbc == NULL
317 && ((_hidden_magma_cbc =
318 EVP_CIPHER_meth_new(NID_magma_cbc, 8 /* block_size */ ,
319 32 /* key_size */ )) == NULL
320 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_cbc, 8)
321 || !EVP_CIPHER_meth_set_flags(_hidden_magma_cbc,
325 EVP_CIPH_ALWAYS_CALL_INIT)
326 || !EVP_CIPHER_meth_set_init(_hidden_magma_cbc, magma_cipher_init)
327 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_cbc,
329 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_cbc,
331 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_cbc,
333 ossl_gost_cipher_ctx))
334 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_cbc, magma_cipher_ctl))) {
335 EVP_CIPHER_meth_free(_hidden_magma_cbc);
336 _hidden_magma_cbc = NULL;
338 return _hidden_magma_cbc;
341 void cipher_gost_destroy(void)
343 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cipher);
344 _hidden_Gost28147_89_cipher = NULL;
345 EVP_CIPHER_meth_free(_hidden_gost89_cnt);
346 _hidden_gost89_cnt = NULL;
347 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cbc);
348 _hidden_Gost28147_89_cbc = NULL;
349 EVP_CIPHER_meth_free(_hidden_gost89_cnt_12);
350 _hidden_gost89_cnt_12 = NULL;
351 EVP_CIPHER_meth_free(_hidden_magma_cbc);
352 _hidden_magma_cbc = NULL;
353 EVP_CIPHER_meth_free(_hidden_magma_ctr);
354 _hidden_magma_ctr = NULL;
355 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm);
356 _hidden_magma_ctr_acpkm = NULL;
357 EVP_CIPHER_meth_free(_hidden_magma_ctr_acpkm_omac);
358 _hidden_magma_ctr_acpkm_omac = NULL;
361 /* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */
362 /* Init functions which set specific parameters */
363 static int gost_imit_init_cpa(EVP_MD_CTX *ctx);
364 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx);
365 /* process block of data */
366 static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count);
367 /* Return computed value */
368 static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md);
370 static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
371 static int gost_imit_cleanup(EVP_MD_CTX *ctx);
372 /* Control function, knows how to set MAC key.*/
373 static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr);
375 static EVP_MD *_hidden_Gost28147_89_MAC_md = NULL;
376 static EVP_MD *_hidden_Gost28147_89_12_MAC_md = NULL;
378 EVP_MD *imit_gost_cpa(void)
380 if (_hidden_Gost28147_89_MAC_md == NULL) {
383 if ((md = EVP_MD_meth_new(NID_id_Gost28147_89_MAC, NID_undef)) == NULL
384 || !EVP_MD_meth_set_result_size(md, 4)
385 || !EVP_MD_meth_set_input_blocksize(md, 8)
386 || !EVP_MD_meth_set_app_datasize(md,
387 sizeof(struct ossl_gost_imit_ctx))
388 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
389 || !EVP_MD_meth_set_init(md, gost_imit_init_cpa)
390 || !EVP_MD_meth_set_update(md, gost_imit_update)
391 || !EVP_MD_meth_set_final(md, gost_imit_final)
392 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
393 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
394 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
395 EVP_MD_meth_free(md);
398 _hidden_Gost28147_89_MAC_md = md;
400 return _hidden_Gost28147_89_MAC_md;
403 void imit_gost_cpa_destroy(void)
405 EVP_MD_meth_free(_hidden_Gost28147_89_MAC_md);
406 _hidden_Gost28147_89_MAC_md = NULL;
409 EVP_MD *imit_gost_cp_12(void)
411 if (_hidden_Gost28147_89_12_MAC_md == NULL) {
414 if ((md = EVP_MD_meth_new(NID_gost_mac_12, NID_undef)) == NULL
415 || !EVP_MD_meth_set_result_size(md, 4)
416 || !EVP_MD_meth_set_input_blocksize(md, 8)
417 || !EVP_MD_meth_set_app_datasize(md,
418 sizeof(struct ossl_gost_imit_ctx))
419 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
420 || !EVP_MD_meth_set_init(md, gost_imit_init_cp_12)
421 || !EVP_MD_meth_set_update(md, gost_imit_update)
422 || !EVP_MD_meth_set_final(md, gost_imit_final)
423 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
424 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
425 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
426 EVP_MD_meth_free(md);
429 _hidden_Gost28147_89_12_MAC_md = md;
431 return _hidden_Gost28147_89_12_MAC_md;
434 void imit_gost_cp_12_destroy(void)
436 EVP_MD_meth_free(_hidden_Gost28147_89_12_MAC_md);
437 _hidden_Gost28147_89_12_MAC_md = NULL;
441 * Correspondence between gost parameter OIDs and substitution blocks
442 * NID field is filed by register_gost_NID function in engine.c
443 * upon engine initialization
446 struct gost_cipher_info gost_cipher_list[] = {
453 * {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
455 {NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
457 {NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
459 {NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
461 {NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
463 {NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
464 {NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
469 * get encryption parameters from crypto network settings FIXME For now we
470 * use environment var CRYPT_PARAMS as place to store these settings.
471 * Actually, it is better to use engine control command, read from
472 * configuration file to set them
474 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
477 struct gost_cipher_info *param;
479 const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
480 if (!params || !strlen(params)) {
482 for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
483 if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
484 return &gost_cipher_list[i];
485 return &gost_cipher_list[0];
488 nid = OBJ_txt2nid(params);
489 if (nid == NID_undef) {
490 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
491 GOST_R_INVALID_CIPHER_PARAM_OID);
492 ERR_add_error_data(3, "Unsupported CRYPT_PARAMS='",
493 params, "' specified in environment or in config");
497 nid = OBJ_obj2nid(obj);
499 for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
501 if (!param->sblock) {
502 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
508 /* Sets cipher param from paramset NID. */
509 static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
511 const struct gost_cipher_info *param;
512 param = get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
516 c->paramNID = param->nid;
517 c->key_meshing = param->key_meshing;
519 gost_init(&(c->cctx), param->sblock);
523 /* Initializes EVP_CIPHER_CTX by paramset NID */
524 static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
525 const unsigned char *key,
526 const unsigned char *iv, int enc,
527 int paramNID, int mode)
529 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
530 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
531 if (!gost_cipher_set_param(c, paramNID))
533 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
536 gost_key(&(c->cctx), key);
538 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
539 EVP_CIPHER_CTX_iv_length(ctx));
541 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
542 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
546 static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
547 const unsigned char *key,
548 const unsigned char *iv,
549 gost_subst_block * block)
551 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
552 gost_init(&(c->cctx), block);
556 gost_key(&(c->cctx), key);
558 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
559 EVP_CIPHER_CTX_iv_length(ctx));
561 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
562 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
566 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
567 const unsigned char *iv, int enc)
569 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
572 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
573 const unsigned char *key,
574 const unsigned char *iv, int enc)
576 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
579 /* Initializes EVP_CIPHER_CTX with default values */
580 int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
581 const unsigned char *iv, int enc)
583 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
587 /* Initializes EVP_CIPHER_CTX with default values */
588 int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
589 const unsigned char *iv, int enc)
591 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
595 /* Initializes EVP_CIPHER_CTX with default values */
596 int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
597 const unsigned char *iv, int enc)
599 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
600 /* FIXME this is just initializtion check */
601 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
602 if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
604 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
607 magma_key(&(c->cctx), key);
609 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
610 EVP_CIPHER_CTX_iv_length(ctx));
612 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
613 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
615 if (EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm
616 || EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm_omac) {
617 c->key_meshing = 1024;
625 /* Initializes EVP_CIPHER_CTX with default values */
626 int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
627 const unsigned char *iv, int enc)
630 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
631 unsigned char keys[64];
632 const EVP_MD *md = EVP_get_digestbynid(NID_magma_mac);
639 if (RAND_bytes(c->kdf_seed, 8) != 1)
643 if (gost_kdftree2012_256(keys, 64, key, 32, (const unsigned char *)"kdf tree", 8, c->kdf_seed, 8, 1) <= 0)
646 c->omac_ctx = EVP_MD_CTX_new();
647 mac_key = EVP_PKEY_new_mac_key(NID_magma_mac, NULL, keys+32, 32);
649 if (mac_key == NULL || c->omac_ctx == NULL) {
650 EVP_PKEY_free(mac_key);
651 OPENSSL_cleanse(keys, sizeof(keys));
655 if (EVP_DigestInit_ex(c->omac_ctx, md, NULL) <= 0 ||
656 EVP_DigestSignInit(c->omac_ctx, NULL, md, NULL, mac_key) <= 0) {
657 EVP_PKEY_free(mac_key);
658 OPENSSL_cleanse(keys, sizeof(keys));
661 EVP_PKEY_free(mac_key);
662 OPENSSL_cleanse(keys + 32, sizeof(keys) - 32);
664 return magma_cipher_init(ctx, keys, iv, enc);
666 return magma_cipher_init(ctx, key, iv, enc);
670 * Wrapper around gostcrypt function from gost89.c which perform key meshing
673 static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
675 struct ossl_gost_cipher_ctx *c = ctx;
676 assert(c->count % 8 == 0 && c->count <= 1024);
677 if (c->key_meshing && c->count == 1024) {
678 cryptopro_key_meshing(&(c->cctx), iv);
680 gostcrypt(&(c->cctx), iv, buf);
681 c->count = c->count % 1024 + 8;
684 static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
686 struct ossl_gost_cipher_ctx *c = ctx;
688 unsigned char buf1[8];
689 assert(c->count % 8 == 0 && c->count <= 1024);
690 if (c->key_meshing && c->count == 1024) {
691 cryptopro_key_meshing(&(c->cctx), iv);
694 gostcrypt(&(c->cctx), iv, buf1);
698 g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
700 buf1[0] = (unsigned char)(g & 0xff);
701 buf1[1] = (unsigned char)((g >> 8) & 0xff);
702 buf1[2] = (unsigned char)((g >> 16) & 0xff);
703 buf1[3] = (unsigned char)((g >> 24) & 0xff);
704 g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
707 if (go > g) /* overflow */
709 buf1[4] = (unsigned char)(g & 0xff);
710 buf1[5] = (unsigned char)((g >> 8) & 0xff);
711 buf1[6] = (unsigned char)((g >> 16) & 0xff);
712 buf1[7] = (unsigned char)((g >> 24) & 0xff);
714 gostcrypt(&(c->cctx), buf1, buf);
715 c->count = c->count % 1024 + 8;
718 /* GOST encryption in CBC mode */
719 int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
720 const unsigned char *in, size_t inl)
723 const unsigned char *in_ptr = in;
724 unsigned char *out_ptr = out;
726 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
727 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
728 if (EVP_CIPHER_CTX_encrypting(ctx)) {
731 for (i = 0; i < 8; i++) {
732 b[i] = iv[i] ^ in_ptr[i];
734 gostcrypt(&(c->cctx), b, out_ptr);
735 memcpy(iv, out_ptr, 8);
742 gostdecrypt(&(c->cctx), in_ptr, b);
743 for (i = 0; i < 8; i++) {
744 out_ptr[i] = iv[i] ^ b[i];
746 memcpy(iv, in_ptr, 8);
755 /* MAGMA encryption in CBC mode */
756 int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
757 const unsigned char *in, size_t inl)
761 const unsigned char *in_ptr = in;
762 unsigned char *out_ptr = out;
764 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
765 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
766 if (EVP_CIPHER_CTX_encrypting(ctx)) {
769 for (i = 0; i < 8; i++) {
770 b[7 - i] = iv[i] ^ in_ptr[i];
772 gostcrypt(&(c->cctx), b, d);
774 for (i = 0; i < 8; i++) {
775 out_ptr[7 - i] = d[i];
777 memcpy(iv, out_ptr, 8);
784 for (i = 0; i < 8; i++) {
785 d[7 - i] = in_ptr[i];
787 gostdecrypt(&(c->cctx), d, b);
788 for (i = 0; i < 8; i++) {
789 out_ptr[i] = iv[i] ^ b[7 - i];
791 memcpy(iv, in_ptr, 8);
800 /* increment counter (64-bit int) by 1 */
801 static void ctr64_inc(unsigned char *counter)
803 inc_counter(counter, 8);
806 /* MAGMA encryption in CTR mode */
807 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
808 const unsigned char *in, size_t inl)
810 const unsigned char *in_ptr = in;
811 unsigned char *out_ptr = out;
814 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
815 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
816 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
818 /* Process partial blocks */
819 if (EVP_CIPHER_CTX_num(ctx)) {
820 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
821 j++, i++, in_ptr++, out_ptr++) {
822 *out_ptr = buf[7 - j] ^ (*in_ptr);
825 EVP_CIPHER_CTX_set_num(ctx, 0);
827 EVP_CIPHER_CTX_set_num(ctx, j);
832 /* Process full blocks */
833 for (; i + 8 <= inl; i += 8, in_ptr += 8, out_ptr += 8) {
834 for (j = 0; j < 8; j++) {
837 gostcrypt(&(c->cctx), b, buf);
838 for (j = 0; j < 8; j++) {
839 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
843 if (c->key_meshing && (c->count % c->key_meshing == 0))
844 acpkm_magma_key_meshing(&(c->cctx));
847 /* Process the rest of plaintext */
849 for (j = 0; j < 8; j++) {
852 gostcrypt(&(c->cctx), b, buf);
854 for (j = 0; i < inl; j++, i++) {
855 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
860 if (c->key_meshing && (c->count % c->key_meshing == 0))
861 acpkm_magma_key_meshing(&(c->cctx));
863 EVP_CIPHER_CTX_set_num(ctx, j);
865 EVP_CIPHER_CTX_set_num(ctx, 0);
871 /* MAGMA encryption in CTR mode */
872 static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
873 const unsigned char *in, size_t inl)
875 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
877 if (in == NULL && inl == 0) /* Final call */
878 return gost2015_final_call(ctx, c->omac_ctx, MAGMA_MAC_MAX_SIZE, c->tag, magma_cipher_do_ctr);
880 /* As in and out can be the same pointer, process unencrypted here */
881 if (EVP_CIPHER_CTX_encrypting(ctx))
882 EVP_DigestSignUpdate(c->omac_ctx, in, inl);
884 if (magma_cipher_do_ctr(ctx, out, in, inl) != inl)
887 /* As in and out can be the same pointer, process decrypted here */
888 if (!EVP_CIPHER_CTX_encrypting(ctx))
889 EVP_DigestSignUpdate(c->omac_ctx, out, inl);
893 /* GOST encryption in CFB mode */
894 int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
895 const unsigned char *in, size_t inl)
897 const unsigned char *in_ptr = in;
898 unsigned char *out_ptr = out;
901 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
902 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
903 /* process partial block if any */
904 if (EVP_CIPHER_CTX_num(ctx)) {
905 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
906 j++, i++, in_ptr++, out_ptr++) {
907 if (!EVP_CIPHER_CTX_encrypting(ctx))
908 buf[j + 8] = *in_ptr;
909 *out_ptr = buf[j] ^ (*in_ptr);
910 if (EVP_CIPHER_CTX_encrypting(ctx))
911 buf[j + 8] = *out_ptr;
914 memcpy(iv, buf + 8, 8);
915 EVP_CIPHER_CTX_set_num(ctx, 0);
917 EVP_CIPHER_CTX_set_num(ctx, j);
922 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
924 * block cipher current iv
926 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
928 * xor next block of input text with it and output it
933 if (!EVP_CIPHER_CTX_encrypting(ctx))
934 memcpy(iv, in_ptr, 8);
935 for (j = 0; j < 8; j++) {
936 out_ptr[j] = buf[j] ^ in_ptr[j];
939 /* Next iv is next block of cipher text */
940 if (EVP_CIPHER_CTX_encrypting(ctx))
941 memcpy(iv, out_ptr, 8);
943 /* Process rest of buffer */
945 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
946 if (!EVP_CIPHER_CTX_encrypting(ctx))
947 memcpy(buf + 8, in_ptr, inl - i);
948 for (j = 0; i < inl; j++, i++) {
949 out_ptr[j] = buf[j] ^ in_ptr[j];
951 EVP_CIPHER_CTX_set_num(ctx, j);
952 if (EVP_CIPHER_CTX_encrypting(ctx))
953 memcpy(buf + 8, out_ptr, j);
955 EVP_CIPHER_CTX_set_num(ctx, 0);
960 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
961 const unsigned char *in, size_t inl)
963 const unsigned char *in_ptr = in;
964 unsigned char *out_ptr = out;
967 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
968 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
969 /* process partial block if any */
970 if (EVP_CIPHER_CTX_num(ctx)) {
971 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
972 j++, i++, in_ptr++, out_ptr++) {
973 *out_ptr = buf[j] ^ (*in_ptr);
976 EVP_CIPHER_CTX_set_num(ctx, 0);
978 EVP_CIPHER_CTX_set_num(ctx, j);
983 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
985 * block cipher current iv
988 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
990 * xor next block of input text with it and output it
995 for (j = 0; j < 8; j++) {
996 out_ptr[j] = buf[j] ^ in_ptr[j];
999 /* Process rest of buffer */
1001 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
1002 for (j = 0; i < inl; j++, i++) {
1003 out_ptr[j] = buf[j] ^ in_ptr[j];
1005 EVP_CIPHER_CTX_set_num(ctx, j);
1007 EVP_CIPHER_CTX_set_num(ctx, 0);
1012 /* Cleaning up of EVP_CIPHER_CTX */
1013 int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
1015 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1016 EVP_MD_CTX_free(c->omac_ctx);
1017 gost_destroy(&(c->cctx));
1018 EVP_CIPHER_CTX_set_app_data(ctx, NULL);
1022 /* Control function for gost cipher */
1023 int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1026 case EVP_CTRL_RAND_KEY:
1029 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
1030 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
1035 case EVP_CTRL_PBE_PRF_NID:
1037 const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
1038 int nid = NID_id_tc26_hmac_gost_3411_2012_512;
1041 if (!strcmp("md_gost12_256", params))
1042 nid = NID_id_tc26_hmac_gost_3411_2012_256;
1043 else if (!strcmp("md_gost12_512", params))
1044 nid = NID_id_tc26_hmac_gost_3411_2012_512;
1045 else if (!strcmp("md_gost94", params))
1046 nid = NID_id_HMACGostR3411_94;
1048 *((int *)ptr) = nid;
1054 case EVP_CTRL_SET_SBOX:
1056 struct ossl_gost_cipher_ctx *c =
1057 EVP_CIPHER_CTX_get_cipher_data(ctx);
1066 if (c->count != 0) {
1070 nid = OBJ_txt2nid(ptr);
1071 if (nid == NID_undef) {
1075 cur_meshing = c->key_meshing;
1076 ret = gost_cipher_set_param(c, nid);
1077 c->key_meshing = cur_meshing;
1082 case EVP_CTRL_KEY_MESH:
1084 struct ossl_gost_cipher_ctx *c =
1085 EVP_CIPHER_CTX_get_cipher_data(ctx);
1091 if (c->count != 0) {
1095 c->key_meshing = arg;
1099 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1105 /* Control function for gost cipher */
1106 int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1109 case EVP_CTRL_RAND_KEY:
1111 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
1112 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
1116 case EVP_CTRL_KEY_MESH:
1118 struct ossl_gost_cipher_ctx *c =
1119 EVP_CIPHER_CTX_get_cipher_data(ctx);
1125 if (c->count != 0) {
1129 c->key_meshing = arg;
1133 GOSTerr(GOST_F_MAGMA_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1139 static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1143 case EVP_CTRL_PROCESS_UNPROTECTED:
1145 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1146 STACK_OF(X509_ATTRIBUTE) *x = ptr;
1147 return gost2015_process_unprotected_attributes(x, arg, MAGMA_MAC_MAX_SIZE, c->tag);
1149 case EVP_CTRL_COPY: {
1150 EVP_CIPHER_CTX *out = ptr;
1151 struct ossl_gost_cipher_ctx *in_cctx = EVP_CIPHER_CTX_get_cipher_data(ctx);
1152 struct ossl_gost_cipher_ctx *out_cctx = EVP_CIPHER_CTX_get_cipher_data(out);
1154 if (in_cctx->omac_ctx == out_cctx->omac_ctx) {
1155 out_cctx->omac_ctx = EVP_MD_CTX_new();
1156 if (out_cctx->omac_ctx == NULL) {
1157 GOSTerr(GOST_F_MAGMA_CIPHER_CTL_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
1161 return EVP_MD_CTX_copy(out_cctx->omac_ctx, in_cctx->omac_ctx);
1164 return magma_cipher_ctl(ctx, type, arg, ptr);
1169 /* Set cipher parameters from ASN1 structure */
1170 int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1173 unsigned char *buf = NULL;
1174 unsigned char *p = NULL;
1175 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1176 GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
1177 ASN1_OCTET_STRING *os = NULL;
1179 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1182 if (!ASN1_OCTET_STRING_set
1183 (gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
1184 GOST_CIPHER_PARAMS_free(gcp);
1185 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1188 ASN1_OBJECT_free(gcp->enc_param_set);
1189 gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
1191 len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
1192 p = buf = OPENSSL_malloc(len);
1194 GOST_CIPHER_PARAMS_free(gcp);
1195 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1198 i2d_GOST_CIPHER_PARAMS(gcp, &p);
1199 GOST_CIPHER_PARAMS_free(gcp);
1201 os = ASN1_OCTET_STRING_new();
1203 if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
1205 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1210 ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
1214 /* Store parameters into ASN1 structure */
1215 int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1218 GOST_CIPHER_PARAMS *gcp = NULL;
1220 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1223 if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
1227 p = params->value.sequence->data;
1229 gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
1230 params->value.sequence->length);
1232 len = gcp->iv->length;
1233 if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
1234 GOST_CIPHER_PARAMS_free(gcp);
1235 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
1239 nid = OBJ_obj2nid(gcp->enc_param_set);
1240 if (nid == NID_undef) {
1241 GOST_CIPHER_PARAMS_free(gcp);
1242 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
1243 GOST_R_INVALID_CIPHER_PARAM_OID);
1247 if (!gost_cipher_set_param(c, nid)) {
1248 GOST_CIPHER_PARAMS_free(gcp);
1251 /*XXX missing non-const accessor */
1252 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
1253 EVP_CIPHER_CTX_iv_length(ctx));
1255 GOST_CIPHER_PARAMS_free(gcp);
1260 #define MAGMA_UKM_LEN 12
1261 static int magma_set_asn1_parameters (EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1263 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1264 c->key_meshing = 8192;
1266 return gost2015_set_asn1_params(params, EVP_CIPHER_CTX_original_iv(ctx), 4,
1270 static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1272 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1273 unsigned char iv[16];
1275 c->key_meshing = 8192;
1277 if (gost2015_get_asn1_params(params, MAGMA_UKM_LEN, iv, 4, c->kdf_seed) < 0)
1280 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, sizeof(iv));
1281 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv, sizeof(iv));
1282 /* Key meshing 8 kb*/
1283 c->key_meshing = 8192;
1288 static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
1290 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1291 memset(c->buffer, 0, sizeof(c->buffer));
1292 memset(c->partial_block, 0, sizeof(c->partial_block));
1297 gost_init(&(c->cctx), block);
1301 static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
1303 return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
1306 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
1308 return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
1311 static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
1312 const unsigned char *data)
1315 * We are using NULL for iv because CryptoPro doesn't interpret
1316 * internal state of MAC algorithm as iv during keymeshing (but does
1317 * initialize internal state from iv in key transport
1319 assert(c->count % 8 == 0 && c->count <= 1024);
1320 if (c->key_meshing && c->count == 1024) {
1321 cryptopro_key_meshing(&(c->cctx), NULL);
1323 mac_block(&(c->cctx), c->buffer, data);
1324 c->count = c->count % 1024 + 8;
1327 int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
1329 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1330 const unsigned char *p = data;
1331 size_t bytes = count;
1332 if (!(c->key_set)) {
1333 GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
1336 if (c->bytes_left) {
1338 for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
1339 c->partial_block[i] = *p;
1342 mac_block_mesh(c, c->partial_block);
1349 mac_block_mesh(c, p);
1354 memcpy(c->partial_block, p, bytes);
1356 c->bytes_left = bytes;
1360 int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
1362 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1364 GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
1367 if (c->count == 0 && c->bytes_left) {
1368 unsigned char buffer[8];
1369 memset(buffer, 0, 8);
1370 gost_imit_update(ctx, buffer, 8);
1372 if (c->bytes_left) {
1374 for (i = c->bytes_left; i < 8; i++) {
1375 c->partial_block[i] = 0;
1377 mac_block_mesh(c, c->partial_block);
1379 get_mac(c->buffer, 8 * c->dgst_size, md);
1383 int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
1386 case EVP_MD_CTRL_KEY_LEN:
1387 *((unsigned int *)(ptr)) = 32;
1389 case EVP_MD_CTRL_SET_KEY:
1391 struct ossl_gost_imit_ctx *gost_imit_ctx = EVP_MD_CTX_md_data(ctx);
1393 if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
1394 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
1397 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
1400 struct gost_mac_key *key = (struct gost_mac_key *)ptr;
1401 if (key->mac_param_nid != NID_undef) {
1402 const struct gost_cipher_info *param =
1403 get_encryption_params(OBJ_nid2obj(key->mac_param_nid));
1404 if (param == NULL) {
1405 GOSTerr(GOST_F_GOST_IMIT_CTRL,
1406 GOST_R_INVALID_MAC_PARAMS);
1409 gost_init(&(gost_imit_ctx->cctx), param->sblock);
1411 gost_key(&(gost_imit_ctx->cctx), key->key);
1412 gost_imit_ctx->key_set = 1;
1415 } else if (arg == 32) {
1416 gost_key(&(gost_imit_ctx->cctx), ptr);
1417 gost_imit_ctx->key_set = 1;
1420 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
1423 case EVP_MD_CTRL_XOF_LEN:
1425 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1426 if (arg < 1 || arg > 8) {
1427 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
1439 int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
1441 if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
1442 memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
1443 sizeof(struct ossl_gost_imit_ctx));
1448 /* Clean up imit ctx */
1449 int gost_imit_cleanup(EVP_MD_CTX *ctx)
1451 memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));