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, gost_cipher_ctl))) {
156 EVP_CIPHER_meth_free(_hidden_gost89_cnt);
157 _hidden_gost89_cnt = NULL;
159 return _hidden_gost89_cnt;
162 static EVP_CIPHER *_hidden_gost89_cnt_12 = NULL;
163 const EVP_CIPHER *cipher_gost_cpcnt_12(void)
165 if (_hidden_gost89_cnt_12 == NULL
166 && ((_hidden_gost89_cnt_12 =
167 EVP_CIPHER_meth_new(NID_gost89_cnt_12, 1 /* block_size */ ,
168 32 /* key_size */ )) == NULL
169 || !EVP_CIPHER_meth_set_iv_length(_hidden_gost89_cnt_12, 8)
170 || !EVP_CIPHER_meth_set_flags(_hidden_gost89_cnt_12,
172 EVP_CIPH_NO_PADDING |
175 EVP_CIPH_ALWAYS_CALL_INIT)
176 || !EVP_CIPHER_meth_set_init(_hidden_gost89_cnt_12,
177 gost_cipher_init_cp_12)
178 || !EVP_CIPHER_meth_set_do_cipher(_hidden_gost89_cnt_12,
180 || !EVP_CIPHER_meth_set_cleanup(_hidden_gost89_cnt_12,
182 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_gost89_cnt_12,
184 ossl_gost_cipher_ctx))
185 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_gost89_cnt_12,
186 gost89_set_asn1_parameters)
187 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_gost89_cnt_12,
188 gost89_get_asn1_parameters)
189 || !EVP_CIPHER_meth_set_ctrl(_hidden_gost89_cnt_12,
191 EVP_CIPHER_meth_free(_hidden_gost89_cnt_12);
192 _hidden_gost89_cnt_12 = NULL;
194 return _hidden_gost89_cnt_12;
197 static EVP_CIPHER *_hidden_magma_ctr = NULL;
198 const EVP_CIPHER *cipher_magma_ctr(void)
200 if (_hidden_magma_ctr == NULL
201 && ((_hidden_magma_ctr =
202 EVP_CIPHER_meth_new(NID_magma_ctr, 1 /* block_size */ ,
203 32 /* key_size */ )) == NULL
204 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr, 8)
205 || !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr,
207 EVP_CIPH_NO_PADDING |
210 EVP_CIPH_ALWAYS_CALL_INIT)
211 || !EVP_CIPHER_meth_set_init(_hidden_magma_ctr, magma_cipher_init)
212 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr,
214 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr,
216 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr,
218 ossl_gost_cipher_ctx))
219 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr,
220 gost89_set_asn1_parameters)
221 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr,
222 gost89_get_asn1_parameters)
223 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr, gost_cipher_ctl))) {
224 EVP_CIPHER_meth_free(_hidden_magma_ctr);
225 _hidden_magma_ctr = NULL;
227 return _hidden_magma_ctr;
230 static EVP_CIPHER *_hidden_magma_cbc = NULL;
231 const EVP_CIPHER *cipher_magma_cbc(void)
233 if (_hidden_magma_cbc == NULL
234 && ((_hidden_magma_cbc =
235 EVP_CIPHER_meth_new(NID_magma_cbc, 8 /* block_size */ ,
236 32 /* key_size */ )) == NULL
237 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_cbc, 8)
238 || !EVP_CIPHER_meth_set_flags(_hidden_magma_cbc,
242 EVP_CIPH_ALWAYS_CALL_INIT)
243 || !EVP_CIPHER_meth_set_init(_hidden_magma_cbc, magma_cipher_init)
244 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_cbc,
246 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_cbc,
248 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_cbc,
250 ossl_gost_cipher_ctx))
251 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_cbc,
252 gost89_set_asn1_parameters)
253 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_cbc,
254 gost89_get_asn1_parameters)
255 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_cbc, gost_cipher_ctl))) {
256 EVP_CIPHER_meth_free(_hidden_magma_cbc);
257 _hidden_magma_cbc = NULL;
259 return _hidden_magma_cbc;
262 void cipher_gost_destroy(void)
264 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cipher);
265 _hidden_Gost28147_89_cipher = NULL;
266 EVP_CIPHER_meth_free(_hidden_gost89_cnt);
267 _hidden_gost89_cnt = NULL;
268 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cbc);
269 _hidden_Gost28147_89_cbc = NULL;
270 EVP_CIPHER_meth_free(_hidden_gost89_cnt_12);
271 _hidden_gost89_cnt_12 = NULL;
272 EVP_CIPHER_meth_free(_hidden_magma_cbc);
273 _hidden_magma_cbc = NULL;
274 EVP_CIPHER_meth_free(_hidden_magma_ctr);
275 _hidden_magma_ctr = NULL;
278 /* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */
279 /* Init functions which set specific parameters */
280 static int gost_imit_init_cpa(EVP_MD_CTX *ctx);
281 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx);
282 /* process block of data */
283 static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count);
284 /* Return computed value */
285 static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md);
287 static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
288 static int gost_imit_cleanup(EVP_MD_CTX *ctx);
289 /* Control function, knows how to set MAC key.*/
290 static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr);
292 static EVP_MD *_hidden_Gost28147_89_MAC_md = NULL;
293 static EVP_MD *_hidden_Gost28147_89_12_MAC_md = NULL;
295 EVP_MD *imit_gost_cpa(void)
297 if (_hidden_Gost28147_89_MAC_md == NULL) {
300 if ((md = EVP_MD_meth_new(NID_id_Gost28147_89_MAC, NID_undef)) == NULL
301 || !EVP_MD_meth_set_result_size(md, 4)
302 || !EVP_MD_meth_set_input_blocksize(md, 8)
303 || !EVP_MD_meth_set_app_datasize(md,
304 sizeof(struct ossl_gost_imit_ctx))
305 || !EVP_MD_meth_set_flags(md, 0)
306 || !EVP_MD_meth_set_init(md, gost_imit_init_cpa)
307 || !EVP_MD_meth_set_update(md, gost_imit_update)
308 || !EVP_MD_meth_set_final(md, gost_imit_final)
309 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
310 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
311 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
312 EVP_MD_meth_free(md);
315 _hidden_Gost28147_89_MAC_md = md;
317 return _hidden_Gost28147_89_MAC_md;
320 void imit_gost_cpa_destroy(void)
322 EVP_MD_meth_free(_hidden_Gost28147_89_MAC_md);
323 _hidden_Gost28147_89_MAC_md = NULL;
326 EVP_MD *imit_gost_cp_12(void)
328 if (_hidden_Gost28147_89_12_MAC_md == NULL) {
331 if ((md = EVP_MD_meth_new(NID_gost_mac_12, NID_undef)) == NULL
332 || !EVP_MD_meth_set_result_size(md, 4)
333 || !EVP_MD_meth_set_input_blocksize(md, 8)
334 || !EVP_MD_meth_set_app_datasize(md,
335 sizeof(struct ossl_gost_imit_ctx))
336 || !EVP_MD_meth_set_flags(md, 0)
337 || !EVP_MD_meth_set_init(md, gost_imit_init_cp_12)
338 || !EVP_MD_meth_set_update(md, gost_imit_update)
339 || !EVP_MD_meth_set_final(md, gost_imit_final)
340 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
341 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
342 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
343 EVP_MD_meth_free(md);
346 _hidden_Gost28147_89_12_MAC_md = md;
348 return _hidden_Gost28147_89_12_MAC_md;
351 void imit_gost_cp_12_destroy(void)
353 EVP_MD_meth_free(_hidden_Gost28147_89_12_MAC_md);
354 _hidden_Gost28147_89_12_MAC_md = NULL;
358 * Correspondence between gost parameter OIDs and substitution blocks
359 * NID field is filed by register_gost_NID function in engine.c
360 * upon engine initialization
363 struct gost_cipher_info gost_cipher_list[] = {
370 * {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
372 {NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
374 {NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
376 {NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
378 {NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
380 {NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
381 {NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
386 * get encryption parameters from crypto network settings FIXME For now we
387 * use environment var CRYPT_PARAMS as place to store these settings.
388 * Actually, it is better to use engine control command, read from
389 * configuration file to set them
391 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
394 struct gost_cipher_info *param;
396 const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
397 if (!params || !strlen(params)) {
399 for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
400 if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
401 return &gost_cipher_list[i];
402 return &gost_cipher_list[0];
405 nid = OBJ_txt2nid(params);
406 if (nid == NID_undef) {
407 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
408 GOST_R_INVALID_CIPHER_PARAM_OID);
412 nid = OBJ_obj2nid(obj);
414 for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
416 if (!param->sblock) {
417 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
423 /* Sets cipher param from paramset NID. */
424 static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
426 const struct gost_cipher_info *param;
427 param = get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
431 c->paramNID = param->nid;
432 c->key_meshing = param->key_meshing;
434 gost_init(&(c->cctx), param->sblock);
438 /* Initializes EVP_CIPHER_CTX by paramset NID */
439 static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
440 const unsigned char *key,
441 const unsigned char *iv, int enc,
442 int paramNID, int mode)
444 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
445 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
446 if (!gost_cipher_set_param(c, paramNID))
448 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
451 gost_key(&(c->cctx), key);
453 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
454 EVP_CIPHER_CTX_iv_length(ctx));
456 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
457 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
461 static int magma_cipher_init_param(EVP_CIPHER_CTX *ctx,
462 const unsigned char *key,
463 const unsigned char *iv, int enc,
464 int paramNID, int mode)
466 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
467 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
468 if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
470 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
473 magma_key(&(c->cctx), key);
475 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
476 EVP_CIPHER_CTX_iv_length(ctx));
478 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
479 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
483 static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
484 const unsigned char *key,
485 const unsigned char *iv,
486 gost_subst_block * block)
488 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
489 gost_init(&(c->cctx), block);
493 gost_key(&(c->cctx), key);
495 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
496 EVP_CIPHER_CTX_iv_length(ctx));
498 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
499 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
503 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
504 const unsigned char *iv, int enc)
506 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
509 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
510 const unsigned char *key,
511 const unsigned char *iv, int enc)
513 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
516 /* Initializes EVP_CIPHER_CTX with default values */
517 int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
518 const unsigned char *iv, int enc)
520 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
524 /* Initializes EVP_CIPHER_CTX with default values */
525 int gost_cipher_init_cbc(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 magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
534 const unsigned char *iv, int enc)
536 return magma_cipher_init_param(ctx, key, iv, enc, NID_undef,
541 * Wrapper around gostcrypt function from gost89.c which perform key meshing
544 static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
546 struct ossl_gost_cipher_ctx *c = ctx;
547 assert(c->count % 8 == 0 && c->count <= 1024);
548 if (c->key_meshing && c->count == 1024) {
549 cryptopro_key_meshing(&(c->cctx), iv);
551 gostcrypt(&(c->cctx), iv, buf);
552 c->count = c->count % 1024 + 8;
555 static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
557 struct ossl_gost_cipher_ctx *c = ctx;
559 unsigned char buf1[8];
560 assert(c->count % 8 == 0 && c->count <= 1024);
561 if (c->key_meshing && c->count == 1024) {
562 cryptopro_key_meshing(&(c->cctx), iv);
565 gostcrypt(&(c->cctx), iv, buf1);
569 g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
571 buf1[0] = (unsigned char)(g & 0xff);
572 buf1[1] = (unsigned char)((g >> 8) & 0xff);
573 buf1[2] = (unsigned char)((g >> 16) & 0xff);
574 buf1[3] = (unsigned char)((g >> 24) & 0xff);
575 g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
578 if (go > g) /* overflow */
580 buf1[4] = (unsigned char)(g & 0xff);
581 buf1[5] = (unsigned char)((g >> 8) & 0xff);
582 buf1[6] = (unsigned char)((g >> 16) & 0xff);
583 buf1[7] = (unsigned char)((g >> 24) & 0xff);
585 gostcrypt(&(c->cctx), buf1, buf);
586 c->count = c->count % 1024 + 8;
589 /* GOST encryption in CBC mode */
590 int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
591 const unsigned char *in, size_t inl)
594 const unsigned char *in_ptr = in;
595 unsigned char *out_ptr = out;
597 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
598 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
599 if (EVP_CIPHER_CTX_encrypting(ctx)) {
602 for (i = 0; i < 8; i++) {
603 b[i] = iv[i] ^ in_ptr[i];
605 gostcrypt(&(c->cctx), b, out_ptr);
606 memcpy(iv, out_ptr, 8);
613 gostdecrypt(&(c->cctx), in_ptr, b);
614 for (i = 0; i < 8; i++) {
615 out_ptr[i] = iv[i] ^ b[i];
617 memcpy(iv, in_ptr, 8);
626 /* MAGMA encryption in CBC mode */
627 int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
628 const unsigned char *in, size_t inl)
632 const unsigned char *in_ptr = in;
633 unsigned char *out_ptr = out;
635 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
636 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
637 if (EVP_CIPHER_CTX_encrypting(ctx)) {
640 for (i = 0; i < 8; i++) {
641 b[7 - i] = iv[i] ^ in_ptr[i];
643 gostcrypt(&(c->cctx), b, d);
645 for (i = 0; i < 8; i++) {
646 out_ptr[7 - i] = d[i];
648 memcpy(iv, out_ptr, 8);
655 for (i = 0; i < 8; i++) {
656 d[7 - i] = in_ptr[i];
658 gostdecrypt(&(c->cctx), d, b);
659 for (i = 0; i < 8; i++) {
660 out_ptr[i] = iv[i] ^ b[7 - i];
662 memcpy(iv, in_ptr, 8);
671 /* increment counter (64-bit int) by 1 */
672 static void ctr64_inc(unsigned char *counter)
674 inc_counter(counter, 8);
677 /* MAGMA encryption in CTR mode */
678 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
679 const unsigned char *in, size_t inl)
681 const unsigned char *in_ptr = in;
682 unsigned char *out_ptr = out;
685 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
686 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
687 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
689 /* Process partial blocks */
690 if (EVP_CIPHER_CTX_num(ctx)) {
691 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
692 j++, i++, in_ptr++, out_ptr++) {
693 *out_ptr = buf[7 - j] ^ (*in_ptr);
696 EVP_CIPHER_CTX_set_num(ctx, 0);
698 EVP_CIPHER_CTX_set_num(ctx, j);
703 /* Process full blocks */
704 for (; i + 8 <= inl; i += 8, in_ptr += 8, out_ptr += 8) {
705 for (j = 0; j < 8; j++) {
708 gostcrypt(&(c->cctx), b, buf);
709 for (j = 0; j < 8; j++) {
710 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
715 /* Process the rest of plaintext */
717 for (j = 0; j < 8; j++) {
720 gostcrypt(&(c->cctx), iv, buf);
722 for (j = 0; i < inl; j++, i++) {
723 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
726 EVP_CIPHER_CTX_set_num(ctx, j);
728 EVP_CIPHER_CTX_set_num(ctx, 0);
734 /* GOST encryption in CFB mode */
735 int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
736 const unsigned char *in, size_t inl)
738 const unsigned char *in_ptr = in;
739 unsigned char *out_ptr = out;
742 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
743 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
744 /* process partial block if any */
745 if (EVP_CIPHER_CTX_num(ctx)) {
746 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
747 j++, i++, in_ptr++, out_ptr++) {
748 if (!EVP_CIPHER_CTX_encrypting(ctx))
749 buf[j + 8] = *in_ptr;
750 *out_ptr = buf[j] ^ (*in_ptr);
751 if (EVP_CIPHER_CTX_encrypting(ctx))
752 buf[j + 8] = *out_ptr;
755 memcpy(iv, buf + 8, 8);
756 EVP_CIPHER_CTX_set_num(ctx, 0);
758 EVP_CIPHER_CTX_set_num(ctx, j);
763 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
765 * block cipher current iv
767 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
769 * xor next block of input text with it and output it
774 if (!EVP_CIPHER_CTX_encrypting(ctx))
775 memcpy(iv, in_ptr, 8);
776 for (j = 0; j < 8; j++) {
777 out_ptr[j] = buf[j] ^ in_ptr[j];
780 /* Next iv is next block of cipher text */
781 if (EVP_CIPHER_CTX_encrypting(ctx))
782 memcpy(iv, out_ptr, 8);
784 /* Process rest of buffer */
786 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
787 if (!EVP_CIPHER_CTX_encrypting(ctx))
788 memcpy(buf + 8, in_ptr, inl - i);
789 for (j = 0; i < inl; j++, i++) {
790 out_ptr[j] = buf[j] ^ in_ptr[j];
792 EVP_CIPHER_CTX_set_num(ctx, j);
793 if (EVP_CIPHER_CTX_encrypting(ctx))
794 memcpy(buf + 8, out_ptr, j);
796 EVP_CIPHER_CTX_set_num(ctx, 0);
801 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
802 const unsigned char *in, size_t inl)
804 const unsigned char *in_ptr = in;
805 unsigned char *out_ptr = out;
808 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
809 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
810 /* process partial block if any */
811 if (EVP_CIPHER_CTX_num(ctx)) {
812 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
813 j++, i++, in_ptr++, out_ptr++) {
814 *out_ptr = buf[j] ^ (*in_ptr);
817 EVP_CIPHER_CTX_set_num(ctx, 0);
819 EVP_CIPHER_CTX_set_num(ctx, j);
824 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
826 * block cipher current iv
829 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
831 * xor next block of input text with it and output it
836 for (j = 0; j < 8; j++) {
837 out_ptr[j] = buf[j] ^ in_ptr[j];
840 /* Process rest of buffer */
842 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
843 for (j = 0; i < inl; j++, i++) {
844 out_ptr[j] = buf[j] ^ in_ptr[j];
846 EVP_CIPHER_CTX_set_num(ctx, j);
848 EVP_CIPHER_CTX_set_num(ctx, 0);
853 /* Cleaning up of EVP_CIPHER_CTX */
854 int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
856 gost_destroy(&((struct ossl_gost_cipher_ctx *)
857 EVP_CIPHER_CTX_get_cipher_data(ctx))->cctx);
858 EVP_CIPHER_CTX_set_app_data(ctx, NULL);
862 /* Control function for gost cipher */
863 int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
869 struct ossl_gost_cipher_ctx *c =
870 EVP_CIPHER_CTX_get_cipher_data(ctx);
874 return gost_cipher_set_param(c, arg);
877 case EVP_CTRL_RAND_KEY:
880 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
881 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
886 case EVP_CTRL_PBE_PRF_NID:
888 const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
889 int nid = NID_id_tc26_hmac_gost_3411_2012_512;
892 if (!strcmp("md_gost12_256", params))
893 nid = NID_id_tc26_hmac_gost_3411_2012_256;
894 else if (!strcmp("md_gost12_512", params))
895 nid = NID_id_tc26_hmac_gost_3411_2012_512;
896 else if (!strcmp("md_gost94", params))
897 nid = NID_id_HMACGostR3411_94;
905 case EVP_CTRL_SET_SBOX:
907 struct ossl_gost_cipher_ctx *c =
908 EVP_CIPHER_CTX_get_cipher_data(ctx);
921 nid = OBJ_txt2nid(ptr);
922 if (nid == NID_undef) {
926 cur_meshing = c->key_meshing;
927 ret = gost_cipher_set_param(c, nid);
928 c->key_meshing = cur_meshing;
933 case EVP_CTRL_KEY_MESH:
935 struct ossl_gost_cipher_ctx *c =
936 EVP_CIPHER_CTX_get_cipher_data(ctx);
946 c->key_meshing = arg;
950 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
956 /* Set cipher parameters from ASN1 structure */
957 int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
960 unsigned char *buf = NULL;
961 unsigned char *p = NULL;
962 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
963 GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
964 ASN1_OCTET_STRING *os = NULL;
966 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
969 if (!ASN1_OCTET_STRING_set
970 (gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
971 GOST_CIPHER_PARAMS_free(gcp);
972 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
975 ASN1_OBJECT_free(gcp->enc_param_set);
976 gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
978 len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
979 p = buf = OPENSSL_malloc(len);
981 GOST_CIPHER_PARAMS_free(gcp);
982 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
985 i2d_GOST_CIPHER_PARAMS(gcp, &p);
986 GOST_CIPHER_PARAMS_free(gcp);
988 os = ASN1_OCTET_STRING_new();
990 if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
992 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
997 ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
1001 /* Store parameters into ASN1 structure */
1002 int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1006 GOST_CIPHER_PARAMS *gcp = NULL;
1008 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1011 if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
1015 p = params->value.sequence->data;
1017 gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
1018 params->value.sequence->length);
1020 len = gcp->iv->length;
1021 if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
1022 GOST_CIPHER_PARAMS_free(gcp);
1023 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
1027 nid = OBJ_obj2nid(gcp->enc_param_set);
1028 if (nid == NID_undef) {
1029 GOST_CIPHER_PARAMS_free(gcp);
1030 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
1031 GOST_R_INVALID_CIPHER_PARAM_OID);
1035 if (!gost_cipher_set_param(c, nid)) {
1036 GOST_CIPHER_PARAMS_free(gcp);
1039 /*XXX missing non-const accessor */
1040 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
1041 EVP_CIPHER_CTX_iv_length(ctx));
1043 GOST_CIPHER_PARAMS_free(gcp);
1048 static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
1050 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1051 memset(c->buffer, 0, sizeof(c->buffer));
1052 memset(c->partial_block, 0, sizeof(c->partial_block));
1057 gost_init(&(c->cctx), block);
1061 static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
1063 return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
1066 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
1068 return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
1071 static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
1072 const unsigned char *data)
1074 unsigned char buffer[8];
1076 * We are using local buffer for iv because CryptoPro doesn't interpret
1077 * internal state of MAC algorithm as iv during keymeshing (but does
1078 * initialize internal state from iv in key transport
1080 assert(c->count % 8 == 0 && c->count <= 1024);
1081 if (c->key_meshing && c->count == 1024) {
1082 cryptopro_key_meshing(&(c->cctx), buffer);
1084 mac_block(&(c->cctx), c->buffer, data);
1085 c->count = c->count % 1024 + 8;
1088 int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
1090 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1091 const unsigned char *p = data;
1092 size_t bytes = count, i;
1093 if (!(c->key_set)) {
1094 GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
1097 if (c->bytes_left) {
1098 for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
1099 c->partial_block[i] = *p;
1102 mac_block_mesh(c, c->partial_block);
1109 mac_block_mesh(c, p);
1114 memcpy(c->partial_block, p, bytes);
1116 c->bytes_left = bytes;
1120 int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
1122 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1124 GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
1127 if (c->count == 0 && c->bytes_left) {
1128 unsigned char buffer[8];
1129 memset(buffer, 0, 8);
1130 gost_imit_update(ctx, buffer, 8);
1132 if (c->bytes_left) {
1134 for (i = c->bytes_left; i < 8; i++) {
1135 c->partial_block[i] = 0;
1137 mac_block_mesh(c, c->partial_block);
1139 get_mac(c->buffer, 8 * c->dgst_size, md);
1143 int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
1146 case EVP_MD_CTRL_KEY_LEN:
1147 *((unsigned int *)(ptr)) = 32;
1149 case EVP_MD_CTRL_SET_KEY:
1151 struct ossl_gost_imit_ctx *gost_imit_ctx = EVP_MD_CTX_md_data(ctx);
1153 if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
1154 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
1157 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
1160 struct gost_mac_key *key = (struct gost_mac_key *)ptr;
1161 if (key->mac_param_nid != NID_undef) {
1162 const struct gost_cipher_info *param =
1163 get_encryption_params(OBJ_nid2obj(key->mac_param_nid));
1164 if (param == NULL) {
1165 GOSTerr(GOST_F_GOST_IMIT_CTRL,
1166 GOST_R_INVALID_MAC_PARAMS);
1169 gost_init(&(gost_imit_ctx->cctx), param->sblock);
1171 gost_key(&(gost_imit_ctx->cctx), key->key);
1172 gost_imit_ctx->key_set = 1;
1175 } else if (arg == 32) {
1176 gost_key(&(gost_imit_ctx->cctx), ptr);
1177 gost_imit_ctx->key_set = 1;
1180 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
1183 case EVP_MD_CTRL_MAC_LEN:
1185 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1186 if (arg < 1 || arg > 8) {
1187 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
1199 int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
1201 if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
1202 memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
1203 sizeof(struct ossl_gost_imit_ctx));
1208 /* Clean up imit ctx */
1209 int gost_imit_cleanup(EVP_MD_CTX *ctx)
1211 memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));