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"
16 #if !defined(CCGOST_DEBUG) && !defined(DEBUG)
23 static int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
24 const unsigned char *iv, int enc);
25 static int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
26 const unsigned char *iv, int enc);
27 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
28 const unsigned char *iv, int enc);
29 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
30 const unsigned char *key,
31 const unsigned char *iv, int enc);
32 /* Handles block of data in CFB mode */
33 static int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
34 const unsigned char *in, size_t inl);
35 /* Handles block of data in CBC mode */
36 static int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
37 const unsigned char *in, size_t inl);
38 /* Handles block of data in CNT mode */
39 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
40 const unsigned char *in, size_t inl);
41 /* Cleanup function */
42 static int gost_cipher_cleanup(EVP_CIPHER_CTX *);
43 /* set/get cipher parameters */
44 static int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
45 static int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
46 /* Control function */
47 static int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
49 static int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
50 const unsigned char *iv, int enc);
51 /* Handles block of data in CBC mode */
52 static int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
53 const unsigned char *in, size_t inl);
54 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
55 const unsigned char *in, size_t inl);
57 static EVP_CIPHER *_hidden_Gost28147_89_cipher = NULL;
58 const EVP_CIPHER *cipher_gost(void)
60 if (_hidden_Gost28147_89_cipher == NULL
61 && ((_hidden_Gost28147_89_cipher =
62 EVP_CIPHER_meth_new(NID_id_Gost28147_89, 1 /* block_size */ ,
63 32 /* key_size */ )) == NULL
64 || !EVP_CIPHER_meth_set_iv_length(_hidden_Gost28147_89_cipher, 8)
65 || !EVP_CIPHER_meth_set_flags(_hidden_Gost28147_89_cipher,
70 EVP_CIPH_ALWAYS_CALL_INIT)
71 || !EVP_CIPHER_meth_set_init(_hidden_Gost28147_89_cipher,
73 || !EVP_CIPHER_meth_set_do_cipher(_hidden_Gost28147_89_cipher,
75 || !EVP_CIPHER_meth_set_cleanup(_hidden_Gost28147_89_cipher,
77 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_Gost28147_89_cipher,
79 ossl_gost_cipher_ctx))
81 !EVP_CIPHER_meth_set_set_asn1_params(_hidden_Gost28147_89_cipher,
82 gost89_set_asn1_parameters)
84 !EVP_CIPHER_meth_set_get_asn1_params(_hidden_Gost28147_89_cipher,
85 gost89_get_asn1_parameters)
86 || !EVP_CIPHER_meth_set_ctrl(_hidden_Gost28147_89_cipher,
88 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cipher);
89 _hidden_Gost28147_89_cipher = NULL;
91 return _hidden_Gost28147_89_cipher;
94 static EVP_CIPHER *_hidden_Gost28147_89_cbc = NULL;
95 const EVP_CIPHER *cipher_gost_cbc(void)
97 if (_hidden_Gost28147_89_cbc == NULL
98 && ((_hidden_Gost28147_89_cbc =
99 EVP_CIPHER_meth_new(NID_gost89_cbc, 8 /* block_size */ ,
100 32 /* key_size */ )) == NULL
101 || !EVP_CIPHER_meth_set_iv_length(_hidden_Gost28147_89_cbc, 8)
102 || !EVP_CIPHER_meth_set_flags(_hidden_Gost28147_89_cbc,
106 EVP_CIPH_ALWAYS_CALL_INIT)
107 || !EVP_CIPHER_meth_set_init(_hidden_Gost28147_89_cbc,
108 gost_cipher_init_cbc)
109 || !EVP_CIPHER_meth_set_do_cipher(_hidden_Gost28147_89_cbc,
111 || !EVP_CIPHER_meth_set_cleanup(_hidden_Gost28147_89_cbc,
113 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_Gost28147_89_cbc,
115 ossl_gost_cipher_ctx))
116 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_Gost28147_89_cbc,
117 gost89_set_asn1_parameters)
118 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_Gost28147_89_cbc,
119 gost89_get_asn1_parameters)
120 || !EVP_CIPHER_meth_set_ctrl(_hidden_Gost28147_89_cbc,
122 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cbc);
123 _hidden_Gost28147_89_cbc = NULL;
125 return _hidden_Gost28147_89_cbc;
128 static EVP_CIPHER *_hidden_gost89_cnt = NULL;
129 const EVP_CIPHER *cipher_gost_cpacnt(void)
131 if (_hidden_gost89_cnt == NULL
132 && ((_hidden_gost89_cnt =
133 EVP_CIPHER_meth_new(NID_gost89_cnt, 1 /* block_size */ ,
134 32 /* key_size */ )) == NULL
135 || !EVP_CIPHER_meth_set_iv_length(_hidden_gost89_cnt, 8)
136 || !EVP_CIPHER_meth_set_flags(_hidden_gost89_cnt,
138 EVP_CIPH_NO_PADDING |
141 EVP_CIPH_ALWAYS_CALL_INIT)
142 || !EVP_CIPHER_meth_set_init(_hidden_gost89_cnt,
143 gost_cipher_init_cpa)
144 || !EVP_CIPHER_meth_set_do_cipher(_hidden_gost89_cnt,
146 || !EVP_CIPHER_meth_set_cleanup(_hidden_gost89_cnt,
148 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_gost89_cnt,
150 ossl_gost_cipher_ctx))
151 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_gost89_cnt,
152 gost89_set_asn1_parameters)
153 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_gost89_cnt,
154 gost89_get_asn1_parameters)
155 || !EVP_CIPHER_meth_set_ctrl(_hidden_gost89_cnt,
157 EVP_CIPHER_meth_free(_hidden_gost89_cnt);
158 _hidden_gost89_cnt = NULL;
160 return _hidden_gost89_cnt;
163 static EVP_CIPHER *_hidden_gost89_cnt_12 = NULL;
164 const EVP_CIPHER *cipher_gost_cpcnt_12(void)
166 if (_hidden_gost89_cnt_12 == NULL
167 && ((_hidden_gost89_cnt_12 =
168 EVP_CIPHER_meth_new(NID_gost89_cnt_12, 1 /* block_size */ ,
169 32 /* key_size */ )) == NULL
170 || !EVP_CIPHER_meth_set_iv_length(_hidden_gost89_cnt_12, 8)
171 || !EVP_CIPHER_meth_set_flags(_hidden_gost89_cnt_12,
173 EVP_CIPH_NO_PADDING |
176 EVP_CIPH_ALWAYS_CALL_INIT)
177 || !EVP_CIPHER_meth_set_init(_hidden_gost89_cnt_12,
178 gost_cipher_init_cp_12)
179 || !EVP_CIPHER_meth_set_do_cipher(_hidden_gost89_cnt_12,
181 || !EVP_CIPHER_meth_set_cleanup(_hidden_gost89_cnt_12,
183 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_gost89_cnt_12,
185 ossl_gost_cipher_ctx))
186 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_gost89_cnt_12,
187 gost89_set_asn1_parameters)
188 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_gost89_cnt_12,
189 gost89_get_asn1_parameters)
190 || !EVP_CIPHER_meth_set_ctrl(_hidden_gost89_cnt_12,
192 EVP_CIPHER_meth_free(_hidden_gost89_cnt_12);
193 _hidden_gost89_cnt_12 = NULL;
195 return _hidden_gost89_cnt_12;
198 static EVP_CIPHER *_hidden_magma_ctr = NULL;
199 const EVP_CIPHER *cipher_magma_ctr(void)
201 if (_hidden_magma_ctr == NULL
202 && ((_hidden_magma_ctr =
203 EVP_CIPHER_meth_new(NID_magma_ctr, 1 /* block_size */ ,
204 32 /* key_size */ )) == NULL
205 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr, 8)
206 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr,
208 EVP_CIPH_NO_PADDING |
211 EVP_CIPH_ALWAYS_CALL_INIT)
212 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr,
214 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr,
216 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr,
218 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr,
220 ossl_gost_cipher_ctx))
221 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr,
222 gost89_set_asn1_parameters)
223 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr,
224 gost89_get_asn1_parameters)
225 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr,
227 EVP_CIPHER_meth_free(_hidden_magma_ctr);
228 _hidden_magma_ctr = NULL;
230 return _hidden_magma_ctr;
233 static EVP_CIPHER *_hidden_magma_cbc = NULL;
234 const EVP_CIPHER *cipher_magma_cbc(void)
236 if (_hidden_magma_cbc == NULL
237 && ((_hidden_magma_cbc =
238 EVP_CIPHER_meth_new(NID_magma_cbc, 8 /* block_size */ ,
239 32 /* key_size */ )) == NULL
240 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_cbc, 8)
241 || !EVP_CIPHER_meth_set_flags(_hidden_magma_cbc,
245 EVP_CIPH_ALWAYS_CALL_INIT)
246 || !EVP_CIPHER_meth_set_init(_hidden_magma_cbc,
248 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_cbc,
250 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_cbc,
252 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_cbc,
254 ossl_gost_cipher_ctx))
255 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_cbc,
256 gost89_set_asn1_parameters)
257 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_cbc,
258 gost89_get_asn1_parameters)
259 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_cbc,
261 EVP_CIPHER_meth_free(_hidden_magma_cbc);
262 _hidden_magma_cbc = NULL;
264 return _hidden_magma_cbc;
267 void cipher_gost_destroy(void)
269 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cipher);
270 _hidden_Gost28147_89_cipher = NULL;
271 EVP_CIPHER_meth_free(_hidden_gost89_cnt);
272 _hidden_gost89_cnt = NULL;
273 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cbc);
274 _hidden_Gost28147_89_cbc = NULL;
275 EVP_CIPHER_meth_free(_hidden_gost89_cnt_12);
276 _hidden_gost89_cnt_12 = NULL;
277 EVP_CIPHER_meth_free(_hidden_magma_cbc);
278 _hidden_magma_cbc = NULL;
279 EVP_CIPHER_meth_free(_hidden_magma_ctr);
280 _hidden_magma_ctr = NULL;
283 /* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */
284 /* Init functions which set specific parameters */
285 static int gost_imit_init_cpa(EVP_MD_CTX *ctx);
286 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx);
287 /* process block of data */
288 static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count);
289 /* Return computed value */
290 static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md);
292 static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
293 static int gost_imit_cleanup(EVP_MD_CTX *ctx);
294 /* Control function, knows how to set MAC key.*/
295 static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr);
297 static EVP_MD *_hidden_Gost28147_89_MAC_md = NULL;
298 static EVP_MD *_hidden_Gost28147_89_12_MAC_md = NULL;
300 EVP_MD *imit_gost_cpa(void)
302 if (_hidden_Gost28147_89_MAC_md == NULL) {
305 if ((md = EVP_MD_meth_new(NID_id_Gost28147_89_MAC, NID_undef)) == NULL
306 || !EVP_MD_meth_set_result_size(md, 4)
307 || !EVP_MD_meth_set_input_blocksize(md, 8)
308 || !EVP_MD_meth_set_app_datasize(md,
311 || !EVP_MD_meth_set_flags(md, 0)
312 || !EVP_MD_meth_set_init(md, gost_imit_init_cpa)
313 || !EVP_MD_meth_set_update(md, gost_imit_update)
314 || !EVP_MD_meth_set_final(md, gost_imit_final)
315 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
316 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
317 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
318 EVP_MD_meth_free(md);
321 _hidden_Gost28147_89_MAC_md = md;
323 return _hidden_Gost28147_89_MAC_md;
326 void imit_gost_cpa_destroy(void)
328 EVP_MD_meth_free(_hidden_Gost28147_89_MAC_md);
329 _hidden_Gost28147_89_MAC_md = NULL;
332 EVP_MD *imit_gost_cp_12(void)
334 if (_hidden_Gost28147_89_12_MAC_md == NULL) {
337 if ((md = EVP_MD_meth_new(NID_gost_mac_12, NID_undef)) == NULL
338 || !EVP_MD_meth_set_result_size(md, 4)
339 || !EVP_MD_meth_set_input_blocksize(md, 8)
340 || !EVP_MD_meth_set_app_datasize(md,
343 || !EVP_MD_meth_set_flags(md, 0)
344 || !EVP_MD_meth_set_init(md, gost_imit_init_cp_12)
345 || !EVP_MD_meth_set_update(md, gost_imit_update)
346 || !EVP_MD_meth_set_final(md, gost_imit_final)
347 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
348 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
349 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
350 EVP_MD_meth_free(md);
353 _hidden_Gost28147_89_12_MAC_md = md;
355 return _hidden_Gost28147_89_12_MAC_md;
358 void imit_gost_cp_12_destroy(void)
360 EVP_MD_meth_free(_hidden_Gost28147_89_12_MAC_md);
361 _hidden_Gost28147_89_12_MAC_md = NULL;
365 * Correspondence between gost parameter OIDs and substitution blocks
366 * NID field is filed by register_gost_NID function in engine.c
367 * upon engine initialization
370 struct gost_cipher_info gost_cipher_list[] = {
377 * {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
379 {NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
381 {NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
383 {NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
385 {NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
387 {NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
388 {NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
393 * get encryption parameters from crypto network settings FIXME For now we
394 * use environment var CRYPT_PARAMS as place to store these settings.
395 * Actually, it is better to use engine control command, read from
396 * configuration file to set them
398 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
401 struct gost_cipher_info *param;
403 const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
404 if (!params || !strlen(params)) {
406 for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
407 if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
408 return &gost_cipher_list[i];
409 return &gost_cipher_list[0];
412 nid = OBJ_txt2nid(params);
413 if (nid == NID_undef) {
414 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
415 GOST_R_INVALID_CIPHER_PARAM_OID);
419 nid = OBJ_obj2nid(obj);
421 for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
423 if (!param->sblock) {
424 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
430 /* Sets cipher param from paramset NID. */
431 static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
433 const struct gost_cipher_info *param;
435 get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
439 c->paramNID = param->nid;
440 c->key_meshing = param->key_meshing;
442 gost_init(&(c->cctx), param->sblock);
446 /* Initializes EVP_CIPHER_CTX by paramset NID */
447 static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
448 const unsigned char *key,
449 const unsigned char *iv, int enc,
450 int paramNID, int mode)
452 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
453 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
454 if (!gost_cipher_set_param(c, paramNID))
456 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
459 gost_key(&(c->cctx), key);
461 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
462 EVP_CIPHER_CTX_iv_length(ctx));
464 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
465 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
469 static int magma_cipher_init_param(EVP_CIPHER_CTX *ctx,
470 const unsigned char *key,
471 const unsigned char *iv, int enc,
472 int paramNID, int mode)
474 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
475 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
476 if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
478 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
481 magma_key(&(c->cctx), key);
483 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
484 EVP_CIPHER_CTX_iv_length(ctx));
486 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
487 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
491 static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
492 const unsigned char *key,
493 const unsigned char *iv,
494 gost_subst_block * block)
496 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
497 gost_init(&(c->cctx), block);
501 gost_key(&(c->cctx), key);
503 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
504 EVP_CIPHER_CTX_iv_length(ctx));
506 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
507 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
511 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
512 const unsigned char *iv, int enc)
514 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
517 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
518 const unsigned char *key,
519 const unsigned char *iv, int enc)
521 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
524 /* Initializes EVP_CIPHER_CTX with default values */
525 int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
526 const unsigned char *iv, int enc)
528 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
532 /* Initializes EVP_CIPHER_CTX with default values */
533 int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
534 const unsigned char *iv, int enc)
536 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
540 /* Initializes EVP_CIPHER_CTX with default values */
541 int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
542 const unsigned char *iv, int enc)
544 return magma_cipher_init_param(ctx, key, iv, enc, NID_undef,
549 * Wrapper around gostcrypt function from gost89.c which perform key meshing
552 static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
554 struct ossl_gost_cipher_ctx *c = ctx;
555 assert(c->count % 8 == 0 && c->count <= 1024);
556 if (c->key_meshing && c->count == 1024) {
557 cryptopro_key_meshing(&(c->cctx), iv);
559 gostcrypt(&(c->cctx), iv, buf);
560 c->count = c->count % 1024 + 8;
563 static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
565 struct ossl_gost_cipher_ctx *c = ctx;
567 unsigned char buf1[8];
568 assert(c->count % 8 == 0 && c->count <= 1024);
569 if (c->key_meshing && c->count == 1024) {
570 cryptopro_key_meshing(&(c->cctx), iv);
573 gostcrypt(&(c->cctx), iv, buf1);
577 g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
579 buf1[0] = (unsigned char)(g & 0xff);
580 buf1[1] = (unsigned char)((g >> 8) & 0xff);
581 buf1[2] = (unsigned char)((g >> 16) & 0xff);
582 buf1[3] = (unsigned char)((g >> 24) & 0xff);
583 g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
586 if (go > g) /* overflow */
588 buf1[4] = (unsigned char)(g & 0xff);
589 buf1[5] = (unsigned char)((g >> 8) & 0xff);
590 buf1[6] = (unsigned char)((g >> 16) & 0xff);
591 buf1[7] = (unsigned char)((g >> 24) & 0xff);
593 gostcrypt(&(c->cctx), buf1, buf);
594 c->count = c->count % 1024 + 8;
597 /* GOST encryption in CBC mode */
598 int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
599 const unsigned char *in, size_t inl)
602 const unsigned char *in_ptr = in;
603 unsigned char *out_ptr = out;
605 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
606 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
607 if (EVP_CIPHER_CTX_encrypting(ctx)) {
610 for (i = 0; i < 8; i++) {
611 b[i] = iv[i] ^ in_ptr[i];
613 gostcrypt(&(c->cctx), b, out_ptr);
614 memcpy(iv, out_ptr, 8);
621 gostdecrypt(&(c->cctx), in_ptr, b);
622 for (i = 0; i < 8; i++) {
623 out_ptr[i] = iv[i] ^ b[i];
625 memcpy(iv, in_ptr, 8);
634 /* MAGMA encryption in CBC mode */
635 int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
636 const unsigned char *in, size_t inl)
640 const unsigned char *in_ptr = in;
641 unsigned char *out_ptr = out;
643 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
644 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
645 if (EVP_CIPHER_CTX_encrypting(ctx)) {
648 for (i = 0; i < 8; i++) {
649 b[7-i] = iv[i] ^ in_ptr[i];
651 gostcrypt(&(c->cctx), b, d);
653 for (i = 0; i < 8; i++) {
656 memcpy(iv, out_ptr, 8);
663 for (i = 0; i < 8; i++) {
666 gostdecrypt(&(c->cctx), d, b);
667 for (i = 0; i < 8; i++) {
668 out_ptr[i] = iv[i] ^ b[7-i];
670 memcpy(iv, in_ptr, 8);
679 /* increment counter (64-bit int) by 1 */
680 static void ctr64_inc(unsigned char *counter)
682 inc_counter(counter, 8);
685 /* MAGMA encryption in CTR mode */
686 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
687 const unsigned char *in, size_t inl)
689 const unsigned char *in_ptr = in;
690 unsigned char *out_ptr = out;
693 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
694 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
695 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
697 /* Process partial blocks */
698 if (EVP_CIPHER_CTX_num(ctx)) {
699 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
700 j++, i++, in_ptr++, out_ptr++) {
701 *out_ptr = buf[7-j] ^ (*in_ptr);
704 EVP_CIPHER_CTX_set_num(ctx, 0);
706 EVP_CIPHER_CTX_set_num(ctx, j);
711 /* Process full blocks */
712 for (; i + 8 <= inl; i += 8, in_ptr += 8, out_ptr += 8) {
713 for (j = 0; j < 8; j++) {
716 gostcrypt(&(c->cctx), b, buf);
717 for (j = 0; j < 8; j++) {
718 out_ptr[j] = buf[7-j] ^ in_ptr[j];
723 /* Process the rest of plaintext */
725 for (j = 0; j < 8; j++) {
728 gostcrypt(&(c->cctx), iv, buf);
730 for (j = 0; i < inl; j++, i++) {
731 out_ptr[j] = buf[7-j] ^ in_ptr[j];
734 EVP_CIPHER_CTX_set_num(ctx, j);
736 EVP_CIPHER_CTX_set_num(ctx, 0);
742 /* GOST encryption in CFB mode */
743 int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
744 const unsigned char *in, size_t inl)
746 const unsigned char *in_ptr = in;
747 unsigned char *out_ptr = out;
750 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
751 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
752 /* process partial block if any */
753 if (EVP_CIPHER_CTX_num(ctx)) {
754 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
755 j++, i++, in_ptr++, out_ptr++) {
756 if (!EVP_CIPHER_CTX_encrypting(ctx))
757 buf[j + 8] = *in_ptr;
758 *out_ptr = buf[j] ^ (*in_ptr);
759 if (EVP_CIPHER_CTX_encrypting(ctx))
760 buf[j + 8] = *out_ptr;
763 memcpy(iv, buf + 8, 8);
764 EVP_CIPHER_CTX_set_num(ctx, 0);
766 EVP_CIPHER_CTX_set_num(ctx, j);
771 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
773 * block cipher current iv
775 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
777 * xor next block of input text with it and output it
782 if (!EVP_CIPHER_CTX_encrypting(ctx))
783 memcpy(iv, in_ptr, 8);
784 for (j = 0; j < 8; j++) {
785 out_ptr[j] = buf[j] ^ in_ptr[j];
788 /* Next iv is next block of cipher text */
789 if (EVP_CIPHER_CTX_encrypting(ctx))
790 memcpy(iv, out_ptr, 8);
792 /* Process rest of buffer */
794 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
795 if (!EVP_CIPHER_CTX_encrypting(ctx))
796 memcpy(buf + 8, in_ptr, inl - i);
797 for (j = 0; i < inl; j++, i++) {
798 out_ptr[j] = buf[j] ^ in_ptr[j];
800 EVP_CIPHER_CTX_set_num(ctx, j);
801 if (EVP_CIPHER_CTX_encrypting(ctx))
802 memcpy(buf + 8, out_ptr, j);
804 EVP_CIPHER_CTX_set_num(ctx, 0);
809 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
810 const unsigned char *in, size_t inl)
812 const unsigned char *in_ptr = in;
813 unsigned char *out_ptr = out;
816 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
817 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
818 /* process partial block if any */
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[j] ^ (*in_ptr);
825 EVP_CIPHER_CTX_set_num(ctx, 0);
827 EVP_CIPHER_CTX_set_num(ctx, j);
832 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
834 * block cipher current iv
837 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
839 * xor next block of input text with it and output it
844 for (j = 0; j < 8; j++) {
845 out_ptr[j] = buf[j] ^ in_ptr[j];
848 /* Process rest of buffer */
850 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
851 for (j = 0; i < inl; j++, i++) {
852 out_ptr[j] = buf[j] ^ in_ptr[j];
854 EVP_CIPHER_CTX_set_num(ctx, j);
856 EVP_CIPHER_CTX_set_num(ctx, 0);
861 /* Cleaning up of EVP_CIPHER_CTX */
862 int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
865 ((struct ossl_gost_cipher_ctx *)
866 EVP_CIPHER_CTX_get_cipher_data(ctx))->cctx);
867 EVP_CIPHER_CTX_set_app_data(ctx, NULL);
871 /* Control function for gost cipher */
872 int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
878 struct ossl_gost_cipher_ctx *c =
879 EVP_CIPHER_CTX_get_cipher_data(ctx);
883 return gost_cipher_set_param(c, arg);
886 case EVP_CTRL_RAND_KEY:
889 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
890 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
895 case EVP_CTRL_PBE_PRF_NID:
897 const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
898 int nid = NID_id_tc26_hmac_gost_3411_2012_512;
901 if (!strcmp("md_gost12_256", params))
902 nid = NID_id_tc26_hmac_gost_3411_2012_256;
903 else if (!strcmp("md_gost12_512", params))
904 nid = NID_id_tc26_hmac_gost_3411_2012_512;
905 else if (!strcmp("md_gost94", params))
906 nid = NID_id_HMACGostR3411_94;
914 case EVP_CTRL_SET_SBOX:
916 struct ossl_gost_cipher_ctx *c =
917 EVP_CIPHER_CTX_get_cipher_data(ctx);
930 nid = OBJ_txt2nid(ptr);
931 if (nid == NID_undef) {
935 cur_meshing = c->key_meshing;
936 ret = gost_cipher_set_param(c, nid);
937 c->key_meshing = cur_meshing;
942 case EVP_CTRL_KEY_MESH:
944 struct ossl_gost_cipher_ctx *c =
945 EVP_CIPHER_CTX_get_cipher_data(ctx);
955 c->key_meshing = arg;
959 GOSTerr(GOST_F_GOST_CIPHER_CTL,
960 GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
966 /* Set cipher parameters from ASN1 structure */
967 int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
970 unsigned char *buf = NULL;
971 unsigned char *p = NULL;
972 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
973 GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
974 ASN1_OCTET_STRING *os = NULL;
976 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
979 if (!ASN1_OCTET_STRING_set
980 (gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
981 GOST_CIPHER_PARAMS_free(gcp);
982 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
985 ASN1_OBJECT_free(gcp->enc_param_set);
986 gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
988 len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
989 p = buf = OPENSSL_malloc(len);
991 GOST_CIPHER_PARAMS_free(gcp);
992 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
995 i2d_GOST_CIPHER_PARAMS(gcp, &p);
996 GOST_CIPHER_PARAMS_free(gcp);
998 os = ASN1_OCTET_STRING_new();
1000 if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
1002 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1007 ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
1011 /* Store parameters into ASN1 structure */
1012 int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1016 GOST_CIPHER_PARAMS *gcp = NULL;
1018 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1021 if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
1025 p = params->value.sequence->data;
1027 gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
1028 params->value.sequence->length);
1030 len = gcp->iv->length;
1031 if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
1032 GOST_CIPHER_PARAMS_free(gcp);
1033 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
1037 nid = OBJ_obj2nid(gcp->enc_param_set);
1038 if (nid == NID_undef) {
1039 GOST_CIPHER_PARAMS_free(gcp);
1040 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
1041 GOST_R_INVALID_CIPHER_PARAM_OID);
1045 if (!gost_cipher_set_param(c, nid)) {
1046 GOST_CIPHER_PARAMS_free(gcp);
1049 /*XXX missing non-const accessor */
1050 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
1051 EVP_CIPHER_CTX_iv_length(ctx));
1053 GOST_CIPHER_PARAMS_free(gcp);
1058 static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
1060 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1061 memset(c->buffer, 0, sizeof(c->buffer));
1062 memset(c->partial_block, 0, sizeof(c->partial_block));
1067 gost_init(&(c->cctx), block);
1071 static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
1073 return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
1076 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
1078 return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
1081 static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
1082 const unsigned char *data)
1084 unsigned char buffer[8];
1086 * We are using local buffer for iv because CryptoPro doesn't interpret
1087 * internal state of MAC algorithm as iv during keymeshing (but does
1088 * initialize internal state from iv in key transport
1090 assert(c->count % 8 == 0 && c->count <= 1024);
1091 if (c->key_meshing && c->count == 1024) {
1092 cryptopro_key_meshing(&(c->cctx), buffer);
1094 mac_block(&(c->cctx), c->buffer, data);
1095 c->count = c->count % 1024 + 8;
1098 int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
1100 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1101 const unsigned char *p = data;
1102 size_t bytes = count, i;
1103 if (!(c->key_set)) {
1104 GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
1107 if (c->bytes_left) {
1108 for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
1109 c->partial_block[i] = *p;
1112 mac_block_mesh(c, c->partial_block);
1119 mac_block_mesh(c, p);
1124 memcpy(c->partial_block, p, bytes);
1126 c->bytes_left = bytes;
1130 int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
1132 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1134 GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
1137 if (c->count == 0 && c->bytes_left) {
1138 unsigned char buffer[8];
1139 memset(buffer, 0, 8);
1140 gost_imit_update(ctx, buffer, 8);
1142 if (c->bytes_left) {
1144 for (i = c->bytes_left; i < 8; i++) {
1145 c->partial_block[i] = 0;
1147 mac_block_mesh(c, c->partial_block);
1149 get_mac(c->buffer, 8 * c->dgst_size, md);
1153 int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
1156 case EVP_MD_CTRL_KEY_LEN:
1157 *((unsigned int *)(ptr)) = 32;
1159 case EVP_MD_CTRL_SET_KEY:
1161 struct ossl_gost_imit_ctx *gost_imit_ctx =
1162 EVP_MD_CTX_md_data(ctx);
1164 if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
1165 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
1168 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
1171 struct gost_mac_key *key = (struct gost_mac_key *)ptr;
1172 if (key->mac_param_nid != NID_undef) {
1173 const struct gost_cipher_info *param =
1174 get_encryption_params(OBJ_nid2obj
1175 (key->mac_param_nid));
1176 if (param == NULL) {
1177 GOSTerr(GOST_F_GOST_IMIT_CTRL,
1178 GOST_R_INVALID_MAC_PARAMS);
1181 gost_init(&(gost_imit_ctx->cctx), param->sblock);
1183 gost_key(&(gost_imit_ctx->cctx), key->key);
1184 gost_imit_ctx->key_set = 1;
1187 } else if (arg == 32) {
1188 gost_key(&(gost_imit_ctx->cctx), ptr);
1189 gost_imit_ctx->key_set = 1;
1192 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
1195 case EVP_MD_CTRL_MAC_LEN:
1197 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1198 if (arg < 1 || arg > 8) {
1199 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
1211 int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
1213 if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
1214 memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
1215 sizeof(struct ossl_gost_imit_ctx));
1220 /* Clean up imit ctx */
1221 int gost_imit_cleanup(EVP_MD_CTX *ctx)
1223 memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));