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);
696 /* Process partial blocks */
697 if (EVP_CIPHER_CTX_num(ctx)) {
698 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
699 j++, i++, in_ptr++, out_ptr++) {
700 *out_ptr = buf[j] ^ (*in_ptr);
703 EVP_CIPHER_CTX_set_num(ctx, 0);
705 EVP_CIPHER_CTX_set_num(ctx, j);
710 /* Process full blocks */
711 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
712 gostcrypt(&(c->cctx), iv, buf);
713 for (j = 0; j < 8; j++) {
714 out_ptr[j] = buf[j] ^ in_ptr[j];
719 /* Process the rest of plaintext */
721 gostcrypt(&(c->cctx), iv, buf);
723 for (j = 0; i < inl; j++, i++) {
724 out_ptr[j] = buf[j] ^ in_ptr[j];
727 EVP_CIPHER_CTX_set_num(ctx, j);
729 EVP_CIPHER_CTX_set_num(ctx, 0);
735 /* GOST encryption in CFB mode */
736 int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
737 const unsigned char *in, size_t inl)
739 const unsigned char *in_ptr = in;
740 unsigned char *out_ptr = out;
743 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
744 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
745 /* process partial block if any */
746 if (EVP_CIPHER_CTX_num(ctx)) {
747 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
748 j++, i++, in_ptr++, out_ptr++) {
749 if (!EVP_CIPHER_CTX_encrypting(ctx))
750 buf[j + 8] = *in_ptr;
751 *out_ptr = buf[j] ^ (*in_ptr);
752 if (EVP_CIPHER_CTX_encrypting(ctx))
753 buf[j + 8] = *out_ptr;
756 memcpy(iv, buf + 8, 8);
757 EVP_CIPHER_CTX_set_num(ctx, 0);
759 EVP_CIPHER_CTX_set_num(ctx, j);
764 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
766 * block cipher current iv
768 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
770 * xor next block of input text with it and output it
775 if (!EVP_CIPHER_CTX_encrypting(ctx))
776 memcpy(iv, in_ptr, 8);
777 for (j = 0; j < 8; j++) {
778 out_ptr[j] = buf[j] ^ in_ptr[j];
781 /* Next iv is next block of cipher text */
782 if (EVP_CIPHER_CTX_encrypting(ctx))
783 memcpy(iv, out_ptr, 8);
785 /* Process rest of buffer */
787 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
788 if (!EVP_CIPHER_CTX_encrypting(ctx))
789 memcpy(buf + 8, in_ptr, inl - i);
790 for (j = 0; i < inl; j++, i++) {
791 out_ptr[j] = buf[j] ^ in_ptr[j];
793 EVP_CIPHER_CTX_set_num(ctx, j);
794 if (EVP_CIPHER_CTX_encrypting(ctx))
795 memcpy(buf + 8, out_ptr, j);
797 EVP_CIPHER_CTX_set_num(ctx, 0);
802 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
803 const unsigned char *in, size_t inl)
805 const unsigned char *in_ptr = in;
806 unsigned char *out_ptr = out;
809 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
810 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
811 /* process partial block if any */
812 if (EVP_CIPHER_CTX_num(ctx)) {
813 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
814 j++, i++, in_ptr++, out_ptr++) {
815 *out_ptr = buf[j] ^ (*in_ptr);
818 EVP_CIPHER_CTX_set_num(ctx, 0);
820 EVP_CIPHER_CTX_set_num(ctx, j);
825 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
827 * block cipher current iv
830 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
832 * xor next block of input text with it and output it
837 for (j = 0; j < 8; j++) {
838 out_ptr[j] = buf[j] ^ in_ptr[j];
841 /* Process rest of buffer */
843 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
844 for (j = 0; i < inl; j++, i++) {
845 out_ptr[j] = buf[j] ^ in_ptr[j];
847 EVP_CIPHER_CTX_set_num(ctx, j);
849 EVP_CIPHER_CTX_set_num(ctx, 0);
854 /* Cleaning up of EVP_CIPHER_CTX */
855 int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
858 ((struct ossl_gost_cipher_ctx *)
859 EVP_CIPHER_CTX_get_cipher_data(ctx))->cctx);
860 EVP_CIPHER_CTX_set_app_data(ctx, NULL);
864 /* Control function for gost cipher */
865 int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
871 struct ossl_gost_cipher_ctx *c =
872 EVP_CIPHER_CTX_get_cipher_data(ctx);
876 return gost_cipher_set_param(c, arg);
879 case EVP_CTRL_RAND_KEY:
882 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
883 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
888 case EVP_CTRL_PBE_PRF_NID:
890 const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
891 int nid = NID_id_tc26_hmac_gost_3411_2012_512;
894 if (!strcmp("md_gost12_256", params))
895 nid = NID_id_tc26_hmac_gost_3411_2012_256;
896 else if (!strcmp("md_gost12_512", params))
897 nid = NID_id_tc26_hmac_gost_3411_2012_512;
898 else if (!strcmp("md_gost94", params))
899 nid = NID_id_HMACGostR3411_94;
907 case EVP_CTRL_SET_SBOX:
909 struct ossl_gost_cipher_ctx *c =
910 EVP_CIPHER_CTX_get_cipher_data(ctx);
923 nid = OBJ_txt2nid(ptr);
924 if (nid == NID_undef) {
928 cur_meshing = c->key_meshing;
929 ret = gost_cipher_set_param(c, nid);
930 c->key_meshing = cur_meshing;
935 case EVP_CTRL_KEY_MESH:
937 struct ossl_gost_cipher_ctx *c =
938 EVP_CIPHER_CTX_get_cipher_data(ctx);
948 c->key_meshing = arg;
952 GOSTerr(GOST_F_GOST_CIPHER_CTL,
953 GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
959 /* Set cipher parameters from ASN1 structure */
960 int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
963 unsigned char *buf = NULL;
964 unsigned char *p = NULL;
965 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
966 GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
967 ASN1_OCTET_STRING *os = NULL;
969 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
972 if (!ASN1_OCTET_STRING_set
973 (gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
974 GOST_CIPHER_PARAMS_free(gcp);
975 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
978 ASN1_OBJECT_free(gcp->enc_param_set);
979 gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
981 len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
982 p = buf = OPENSSL_malloc(len);
984 GOST_CIPHER_PARAMS_free(gcp);
985 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
988 i2d_GOST_CIPHER_PARAMS(gcp, &p);
989 GOST_CIPHER_PARAMS_free(gcp);
991 os = ASN1_OCTET_STRING_new();
993 if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
995 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1000 ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
1004 /* Store parameters into ASN1 structure */
1005 int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1009 GOST_CIPHER_PARAMS *gcp = NULL;
1011 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1014 if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
1018 p = params->value.sequence->data;
1020 gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
1021 params->value.sequence->length);
1023 len = gcp->iv->length;
1024 if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
1025 GOST_CIPHER_PARAMS_free(gcp);
1026 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
1030 nid = OBJ_obj2nid(gcp->enc_param_set);
1031 if (nid == NID_undef) {
1032 GOST_CIPHER_PARAMS_free(gcp);
1033 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
1034 GOST_R_INVALID_CIPHER_PARAM_OID);
1038 if (!gost_cipher_set_param(c, nid)) {
1039 GOST_CIPHER_PARAMS_free(gcp);
1042 /*XXX missing non-const accessor */
1043 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
1044 EVP_CIPHER_CTX_iv_length(ctx));
1046 GOST_CIPHER_PARAMS_free(gcp);
1051 static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
1053 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1054 memset(c->buffer, 0, sizeof(c->buffer));
1055 memset(c->partial_block, 0, sizeof(c->partial_block));
1060 gost_init(&(c->cctx), block);
1064 static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
1066 return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
1069 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
1071 return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
1074 static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
1075 const unsigned char *data)
1077 unsigned char buffer[8];
1079 * We are using local buffer for iv because CryptoPro doesn't interpret
1080 * internal state of MAC algorithm as iv during keymeshing (but does
1081 * initialize internal state from iv in key transport
1083 assert(c->count % 8 == 0 && c->count <= 1024);
1084 if (c->key_meshing && c->count == 1024) {
1085 cryptopro_key_meshing(&(c->cctx), buffer);
1087 mac_block(&(c->cctx), c->buffer, data);
1088 c->count = c->count % 1024 + 8;
1091 int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
1093 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1094 const unsigned char *p = data;
1095 size_t bytes = count, i;
1096 if (!(c->key_set)) {
1097 GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
1100 if (c->bytes_left) {
1101 for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
1102 c->partial_block[i] = *p;
1105 mac_block_mesh(c, c->partial_block);
1112 mac_block_mesh(c, p);
1117 memcpy(c->partial_block, p, bytes);
1119 c->bytes_left = bytes;
1123 int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
1125 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1127 GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
1130 if (c->count == 0 && c->bytes_left) {
1131 unsigned char buffer[8];
1132 memset(buffer, 0, 8);
1133 gost_imit_update(ctx, buffer, 8);
1135 if (c->bytes_left) {
1137 for (i = c->bytes_left; i < 8; i++) {
1138 c->partial_block[i] = 0;
1140 mac_block_mesh(c, c->partial_block);
1142 get_mac(c->buffer, 8 * c->dgst_size, md);
1146 int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
1149 case EVP_MD_CTRL_KEY_LEN:
1150 *((unsigned int *)(ptr)) = 32;
1152 case EVP_MD_CTRL_SET_KEY:
1154 struct ossl_gost_imit_ctx *gost_imit_ctx =
1155 EVP_MD_CTX_md_data(ctx);
1157 if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
1158 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
1161 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
1164 struct gost_mac_key *key = (struct gost_mac_key *)ptr;
1165 if (key->mac_param_nid != NID_undef) {
1166 const struct gost_cipher_info *param =
1167 get_encryption_params(OBJ_nid2obj
1168 (key->mac_param_nid));
1169 if (param == NULL) {
1170 GOSTerr(GOST_F_GOST_IMIT_CTRL,
1171 GOST_R_INVALID_MAC_PARAMS);
1174 gost_init(&(gost_imit_ctx->cctx), param->sblock);
1176 gost_key(&(gost_imit_ctx->cctx), key->key);
1177 gost_imit_ctx->key_set = 1;
1180 } else if (arg == 32) {
1181 gost_key(&(gost_imit_ctx->cctx), ptr);
1182 gost_imit_ctx->key_set = 1;
1185 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
1188 case EVP_MD_CTRL_MAC_LEN:
1190 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1191 if (arg < 1 || arg > 8) {
1192 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
1204 int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
1206 if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
1207 memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
1208 sizeof(struct ossl_gost_imit_ctx));
1213 /* Clean up imit ctx */
1214 int gost_imit_cleanup(EVP_MD_CTX *ctx)
1216 memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));