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_cbc(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 EVP_CIPHER *_hidden_Gost28147_89_cipher = NULL;
55 const EVP_CIPHER *cipher_gost(void)
57 if (_hidden_Gost28147_89_cipher == NULL
58 && ((_hidden_Gost28147_89_cipher =
59 EVP_CIPHER_meth_new(NID_id_Gost28147_89, 1 /* block_size */ ,
60 32 /* key_size */ )) == NULL
61 || !EVP_CIPHER_meth_set_iv_length(_hidden_Gost28147_89_cipher, 8)
62 || !EVP_CIPHER_meth_set_flags(_hidden_Gost28147_89_cipher,
67 EVP_CIPH_ALWAYS_CALL_INIT)
68 || !EVP_CIPHER_meth_set_init(_hidden_Gost28147_89_cipher,
70 || !EVP_CIPHER_meth_set_do_cipher(_hidden_Gost28147_89_cipher,
72 || !EVP_CIPHER_meth_set_cleanup(_hidden_Gost28147_89_cipher,
74 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_Gost28147_89_cipher,
76 ossl_gost_cipher_ctx))
78 !EVP_CIPHER_meth_set_set_asn1_params(_hidden_Gost28147_89_cipher,
79 gost89_set_asn1_parameters)
81 !EVP_CIPHER_meth_set_get_asn1_params(_hidden_Gost28147_89_cipher,
82 gost89_get_asn1_parameters)
83 || !EVP_CIPHER_meth_set_ctrl(_hidden_Gost28147_89_cipher,
85 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cipher);
86 _hidden_Gost28147_89_cipher = NULL;
88 return _hidden_Gost28147_89_cipher;
91 static EVP_CIPHER *_hidden_Gost28147_89_cbc = NULL;
92 const EVP_CIPHER *cipher_gost_cbc(void)
94 if (_hidden_Gost28147_89_cbc == NULL
95 && ((_hidden_Gost28147_89_cbc =
96 EVP_CIPHER_meth_new(NID_gost89_cbc, 8 /* block_size */ ,
97 32 /* key_size */ )) == NULL
98 || !EVP_CIPHER_meth_set_iv_length(_hidden_Gost28147_89_cbc, 8)
99 || !EVP_CIPHER_meth_set_flags(_hidden_Gost28147_89_cbc,
103 EVP_CIPH_ALWAYS_CALL_INIT)
104 || !EVP_CIPHER_meth_set_init(_hidden_Gost28147_89_cbc,
105 gost_cipher_init_cbc)
106 || !EVP_CIPHER_meth_set_do_cipher(_hidden_Gost28147_89_cbc,
108 || !EVP_CIPHER_meth_set_cleanup(_hidden_Gost28147_89_cbc,
110 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_Gost28147_89_cbc,
112 ossl_gost_cipher_ctx))
113 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_Gost28147_89_cbc,
114 gost89_set_asn1_parameters)
115 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_Gost28147_89_cbc,
116 gost89_get_asn1_parameters)
117 || !EVP_CIPHER_meth_set_ctrl(_hidden_Gost28147_89_cbc,
119 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cbc);
120 _hidden_Gost28147_89_cbc = NULL;
122 return _hidden_Gost28147_89_cbc;
125 static EVP_CIPHER *_hidden_gost89_cnt = NULL;
126 const EVP_CIPHER *cipher_gost_cpacnt(void)
128 if (_hidden_gost89_cnt == NULL
129 && ((_hidden_gost89_cnt =
130 EVP_CIPHER_meth_new(NID_gost89_cnt, 1 /* block_size */ ,
131 32 /* key_size */ )) == NULL
132 || !EVP_CIPHER_meth_set_iv_length(_hidden_gost89_cnt, 8)
133 || !EVP_CIPHER_meth_set_flags(_hidden_gost89_cnt,
135 EVP_CIPH_NO_PADDING |
138 EVP_CIPH_ALWAYS_CALL_INIT)
139 || !EVP_CIPHER_meth_set_init(_hidden_gost89_cnt,
140 gost_cipher_init_cpa)
141 || !EVP_CIPHER_meth_set_do_cipher(_hidden_gost89_cnt,
143 || !EVP_CIPHER_meth_set_cleanup(_hidden_gost89_cnt,
145 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_gost89_cnt,
147 ossl_gost_cipher_ctx))
148 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_gost89_cnt,
149 gost89_set_asn1_parameters)
150 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_gost89_cnt,
151 gost89_get_asn1_parameters)
152 || !EVP_CIPHER_meth_set_ctrl(_hidden_gost89_cnt,
154 EVP_CIPHER_meth_free(_hidden_gost89_cnt);
155 _hidden_gost89_cnt = NULL;
157 return _hidden_gost89_cnt;
160 static EVP_CIPHER *_hidden_gost89_cnt_12 = NULL;
161 const EVP_CIPHER *cipher_gost_cpcnt_12(void)
163 if (_hidden_gost89_cnt_12 == NULL
164 && ((_hidden_gost89_cnt_12 =
165 EVP_CIPHER_meth_new(NID_gost89_cnt_12, 1 /* block_size */ ,
166 32 /* key_size */ )) == NULL
167 || !EVP_CIPHER_meth_set_iv_length(_hidden_gost89_cnt_12, 8)
168 || !EVP_CIPHER_meth_set_flags(_hidden_gost89_cnt_12,
170 EVP_CIPH_NO_PADDING |
173 EVP_CIPH_ALWAYS_CALL_INIT)
174 || !EVP_CIPHER_meth_set_init(_hidden_gost89_cnt_12,
175 gost_cipher_init_cp_12)
176 || !EVP_CIPHER_meth_set_do_cipher(_hidden_gost89_cnt_12,
178 || !EVP_CIPHER_meth_set_cleanup(_hidden_gost89_cnt_12,
180 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_gost89_cnt_12,
182 ossl_gost_cipher_ctx))
183 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_gost89_cnt_12,
184 gost89_set_asn1_parameters)
185 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_gost89_cnt_12,
186 gost89_get_asn1_parameters)
187 || !EVP_CIPHER_meth_set_ctrl(_hidden_gost89_cnt_12,
189 EVP_CIPHER_meth_free(_hidden_gost89_cnt_12);
190 _hidden_gost89_cnt_12 = NULL;
192 return _hidden_gost89_cnt_12;
195 static EVP_CIPHER *_hidden_magma_cbc = NULL;
196 const EVP_CIPHER *cipher_magma_cbc(void)
198 if (_hidden_magma_cbc == NULL
199 && ((_hidden_magma_cbc =
200 EVP_CIPHER_meth_new(NID_magma_cbc, 8 /* block_size */ ,
201 32 /* key_size */ )) == NULL
202 || !EVP_CIPHER_meth_set_iv_length(_hidden_magma_cbc, 8)
203 || !EVP_CIPHER_meth_set_flags(_hidden_magma_cbc,
207 EVP_CIPH_ALWAYS_CALL_INIT)
208 || !EVP_CIPHER_meth_set_init(_hidden_magma_cbc,
209 magma_cipher_init_cbc)
210 || !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_cbc,
212 || !EVP_CIPHER_meth_set_cleanup(_hidden_magma_cbc,
214 || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_cbc,
216 ossl_gost_cipher_ctx))
217 || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_cbc,
218 gost89_set_asn1_parameters)
219 || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_cbc,
220 gost89_get_asn1_parameters)
221 || !EVP_CIPHER_meth_set_ctrl(_hidden_magma_cbc,
223 EVP_CIPHER_meth_free(_hidden_magma_cbc);
224 _hidden_magma_cbc = NULL;
226 return _hidden_magma_cbc;
229 void cipher_gost_destroy(void)
231 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cipher);
232 _hidden_Gost28147_89_cipher = NULL;
233 EVP_CIPHER_meth_free(_hidden_gost89_cnt);
234 _hidden_gost89_cnt = NULL;
235 EVP_CIPHER_meth_free(_hidden_Gost28147_89_cbc);
236 _hidden_Gost28147_89_cbc = NULL;
237 EVP_CIPHER_meth_free(_hidden_gost89_cnt_12);
238 _hidden_gost89_cnt_12 = NULL;
241 /* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */
242 /* Init functions which set specific parameters */
243 static int gost_imit_init_cpa(EVP_MD_CTX *ctx);
244 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx);
245 /* process block of data */
246 static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count);
247 /* Return computed value */
248 static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md);
250 static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
251 static int gost_imit_cleanup(EVP_MD_CTX *ctx);
252 /* Control function, knows how to set MAC key.*/
253 static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr);
255 static EVP_MD *_hidden_Gost28147_89_MAC_md = NULL;
256 static EVP_MD *_hidden_Gost28147_89_12_MAC_md = NULL;
258 EVP_MD *imit_gost_cpa(void)
260 if (_hidden_Gost28147_89_MAC_md == NULL) {
263 if ((md = EVP_MD_meth_new(NID_id_Gost28147_89_MAC, NID_undef)) == NULL
264 || !EVP_MD_meth_set_result_size(md, 4)
265 || !EVP_MD_meth_set_input_blocksize(md, 8)
266 || !EVP_MD_meth_set_app_datasize(md,
269 || !EVP_MD_meth_set_flags(md, 0)
270 || !EVP_MD_meth_set_init(md, gost_imit_init_cpa)
271 || !EVP_MD_meth_set_update(md, gost_imit_update)
272 || !EVP_MD_meth_set_final(md, gost_imit_final)
273 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
274 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
275 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
276 EVP_MD_meth_free(md);
279 _hidden_Gost28147_89_MAC_md = md;
281 return _hidden_Gost28147_89_MAC_md;
284 void imit_gost_cpa_destroy(void)
286 EVP_MD_meth_free(_hidden_Gost28147_89_MAC_md);
287 _hidden_Gost28147_89_MAC_md = NULL;
290 EVP_MD *imit_gost_cp_12(void)
292 if (_hidden_Gost28147_89_12_MAC_md == NULL) {
295 if ((md = EVP_MD_meth_new(NID_gost_mac_12, NID_undef)) == NULL
296 || !EVP_MD_meth_set_result_size(md, 4)
297 || !EVP_MD_meth_set_input_blocksize(md, 8)
298 || !EVP_MD_meth_set_app_datasize(md,
301 || !EVP_MD_meth_set_flags(md, 0)
302 || !EVP_MD_meth_set_init(md, gost_imit_init_cp_12)
303 || !EVP_MD_meth_set_update(md, gost_imit_update)
304 || !EVP_MD_meth_set_final(md, gost_imit_final)
305 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
306 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
307 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
308 EVP_MD_meth_free(md);
311 _hidden_Gost28147_89_12_MAC_md = md;
313 return _hidden_Gost28147_89_12_MAC_md;
316 void imit_gost_cp_12_destroy(void)
318 EVP_MD_meth_free(_hidden_Gost28147_89_12_MAC_md);
319 _hidden_Gost28147_89_12_MAC_md = NULL;
323 * Correspondence between gost parameter OIDs and substitution blocks
324 * NID field is filed by register_gost_NID function in engine.c
325 * upon engine initialization
328 struct gost_cipher_info gost_cipher_list[] = {
335 * {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
337 {NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
339 {NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
341 {NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
343 {NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
345 {NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
346 {NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
351 * get encryption parameters from crypto network settings FIXME For now we
352 * use environment var CRYPT_PARAMS as place to store these settings.
353 * Actually, it is better to use engine control command, read from
354 * configuration file to set them
356 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
359 struct gost_cipher_info *param;
361 const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
362 if (!params || !strlen(params)) {
364 for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
365 if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
366 return &gost_cipher_list[i];
367 return &gost_cipher_list[0];
370 nid = OBJ_txt2nid(params);
371 if (nid == NID_undef) {
372 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
373 GOST_R_INVALID_CIPHER_PARAM_OID);
377 nid = OBJ_obj2nid(obj);
379 for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
381 if (!param->sblock) {
382 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
388 /* Sets cipher param from paramset NID. */
389 static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
391 const struct gost_cipher_info *param;
393 get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
397 c->paramNID = param->nid;
398 c->key_meshing = param->key_meshing;
400 gost_init(&(c->cctx), param->sblock);
404 /* Initializes EVP_CIPHER_CTX by paramset NID */
405 static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
406 const unsigned char *key,
407 const unsigned char *iv, int enc,
408 int paramNID, int mode)
410 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
411 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
412 if (!gost_cipher_set_param(c, paramNID))
414 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
417 gost_key(&(c->cctx), key);
419 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
420 EVP_CIPHER_CTX_iv_length(ctx));
422 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
423 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
427 static int magma_cipher_init_param(EVP_CIPHER_CTX *ctx,
428 const unsigned char *key,
429 const unsigned char *iv, int enc,
430 int paramNID, int mode)
432 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
433 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
434 if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
436 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
439 magma_key(&(c->cctx), key);
441 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
442 EVP_CIPHER_CTX_iv_length(ctx));
444 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
445 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
449 static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
450 const unsigned char *key,
451 const unsigned char *iv,
452 gost_subst_block * block)
454 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
455 gost_init(&(c->cctx), block);
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 gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
470 const unsigned char *iv, int enc)
472 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
475 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
476 const unsigned char *key,
477 const unsigned char *iv, int enc)
479 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
482 /* Initializes EVP_CIPHER_CTX with default values */
483 int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
484 const unsigned char *iv, int enc)
486 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
490 /* Initializes EVP_CIPHER_CTX with default values */
491 int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
492 const unsigned char *iv, int enc)
494 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
498 /* Initializes EVP_CIPHER_CTX with default values */
499 int magma_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
500 const unsigned char *iv, int enc)
502 return magma_cipher_init_param(ctx, key, iv, enc, NID_undef,
507 * Wrapper around gostcrypt function from gost89.c which perform key meshing
510 static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
512 struct ossl_gost_cipher_ctx *c = ctx;
513 assert(c->count % 8 == 0 && c->count <= 1024);
514 if (c->key_meshing && c->count == 1024) {
515 cryptopro_key_meshing(&(c->cctx), iv);
517 gostcrypt(&(c->cctx), iv, buf);
518 c->count = c->count % 1024 + 8;
521 static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
523 struct ossl_gost_cipher_ctx *c = ctx;
525 unsigned char buf1[8];
526 assert(c->count % 8 == 0 && c->count <= 1024);
527 if (c->key_meshing && c->count == 1024) {
528 cryptopro_key_meshing(&(c->cctx), iv);
531 gostcrypt(&(c->cctx), iv, buf1);
535 g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
537 buf1[0] = (unsigned char)(g & 0xff);
538 buf1[1] = (unsigned char)((g >> 8) & 0xff);
539 buf1[2] = (unsigned char)((g >> 16) & 0xff);
540 buf1[3] = (unsigned char)((g >> 24) & 0xff);
541 g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
544 if (go > g) /* overflow */
546 buf1[4] = (unsigned char)(g & 0xff);
547 buf1[5] = (unsigned char)((g >> 8) & 0xff);
548 buf1[6] = (unsigned char)((g >> 16) & 0xff);
549 buf1[7] = (unsigned char)((g >> 24) & 0xff);
551 gostcrypt(&(c->cctx), buf1, buf);
552 c->count = c->count % 1024 + 8;
555 /* GOST encryption in CBC mode */
556 int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
557 const unsigned char *in, size_t inl)
560 const unsigned char *in_ptr = in;
561 unsigned char *out_ptr = out;
563 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
564 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
565 if (EVP_CIPHER_CTX_encrypting(ctx)) {
568 for (i = 0; i < 8; i++) {
569 b[i] = iv[i] ^ in_ptr[i];
571 gostcrypt(&(c->cctx), b, out_ptr);
572 memcpy(iv, out_ptr, 8);
579 gostdecrypt(&(c->cctx), in_ptr, b);
580 for (i = 0; i < 8; i++) {
581 out_ptr[i] = iv[i] ^ b[i];
583 memcpy(iv, in_ptr, 8);
592 /* GOST encryption in CBC mode */
593 int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
594 const unsigned char *in, size_t inl)
598 const unsigned char *in_ptr = in;
599 unsigned char *out_ptr = out;
601 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
602 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
603 if (EVP_CIPHER_CTX_encrypting(ctx)) {
606 for (i = 0; i < 8; i++) {
607 b[7-i] = iv[i] ^ in_ptr[i];
609 gostcrypt(&(c->cctx), b, d);
611 for (i = 0; i < 8; i++) {
614 memcpy(iv, out_ptr, 8);
621 for (i = 0; i < 8; i++) {
624 gostdecrypt(&(c->cctx), d, b);
625 for (i = 0; i < 8; i++) {
626 out_ptr[i] = iv[i] ^ b[7-i];
628 memcpy(iv, in_ptr, 8);
637 /* GOST encryption in CFB mode */
638 int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
639 const unsigned char *in, size_t inl)
641 const unsigned char *in_ptr = in;
642 unsigned char *out_ptr = out;
645 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
646 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
647 /* process partial block if any */
648 if (EVP_CIPHER_CTX_num(ctx)) {
649 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
650 j++, i++, in_ptr++, out_ptr++) {
651 if (!EVP_CIPHER_CTX_encrypting(ctx))
652 buf[j + 8] = *in_ptr;
653 *out_ptr = buf[j] ^ (*in_ptr);
654 if (EVP_CIPHER_CTX_encrypting(ctx))
655 buf[j + 8] = *out_ptr;
658 memcpy(iv, buf + 8, 8);
659 EVP_CIPHER_CTX_set_num(ctx, 0);
661 EVP_CIPHER_CTX_set_num(ctx, j);
666 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
668 * block cipher current iv
670 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
672 * xor next block of input text with it and output it
677 if (!EVP_CIPHER_CTX_encrypting(ctx))
678 memcpy(iv, in_ptr, 8);
679 for (j = 0; j < 8; j++) {
680 out_ptr[j] = buf[j] ^ in_ptr[j];
683 /* Next iv is next block of cipher text */
684 if (EVP_CIPHER_CTX_encrypting(ctx))
685 memcpy(iv, out_ptr, 8);
687 /* Process rest of buffer */
689 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
690 if (!EVP_CIPHER_CTX_encrypting(ctx))
691 memcpy(buf + 8, in_ptr, inl - i);
692 for (j = 0; i < inl; j++, i++) {
693 out_ptr[j] = buf[j] ^ in_ptr[j];
695 EVP_CIPHER_CTX_set_num(ctx, j);
696 if (EVP_CIPHER_CTX_encrypting(ctx))
697 memcpy(buf + 8, out_ptr, j);
699 EVP_CIPHER_CTX_set_num(ctx, 0);
704 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
705 const unsigned char *in, size_t inl)
707 const unsigned char *in_ptr = in;
708 unsigned char *out_ptr = out;
711 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
712 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
713 /* process partial block if any */
714 if (EVP_CIPHER_CTX_num(ctx)) {
715 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
716 j++, i++, in_ptr++, out_ptr++) {
717 *out_ptr = buf[j] ^ (*in_ptr);
720 EVP_CIPHER_CTX_set_num(ctx, 0);
722 EVP_CIPHER_CTX_set_num(ctx, j);
727 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
729 * block cipher current iv
732 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
734 * xor next block of input text with it and output it
739 for (j = 0; j < 8; j++) {
740 out_ptr[j] = buf[j] ^ in_ptr[j];
743 /* Process rest of buffer */
745 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
746 for (j = 0; i < inl; j++, i++) {
747 out_ptr[j] = buf[j] ^ in_ptr[j];
749 EVP_CIPHER_CTX_set_num(ctx, j);
751 EVP_CIPHER_CTX_set_num(ctx, 0);
756 /* Cleaning up of EVP_CIPHER_CTX */
757 int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
760 ((struct ossl_gost_cipher_ctx *)
761 EVP_CIPHER_CTX_get_cipher_data(ctx))->cctx);
762 EVP_CIPHER_CTX_set_app_data(ctx, NULL);
766 /* Control function for gost cipher */
767 int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
773 struct ossl_gost_cipher_ctx *c =
774 EVP_CIPHER_CTX_get_cipher_data(ctx);
778 return gost_cipher_set_param(c, arg);
781 case EVP_CTRL_RAND_KEY:
784 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
785 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
790 case EVP_CTRL_PBE_PRF_NID:
792 const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
793 int nid = NID_id_tc26_hmac_gost_3411_2012_512;
796 if (!strcmp("md_gost12_256", params))
797 nid = NID_id_tc26_hmac_gost_3411_2012_256;
798 else if (!strcmp("md_gost12_512", params))
799 nid = NID_id_tc26_hmac_gost_3411_2012_512;
800 else if (!strcmp("md_gost94", params))
801 nid = NID_id_HMACGostR3411_94;
809 case EVP_CTRL_SET_SBOX:
811 struct ossl_gost_cipher_ctx *c =
812 EVP_CIPHER_CTX_get_cipher_data(ctx);
825 nid = OBJ_txt2nid(ptr);
826 if (nid == NID_undef) {
830 cur_meshing = c->key_meshing;
831 ret = gost_cipher_set_param(c, nid);
832 c->key_meshing = cur_meshing;
837 case EVP_CTRL_KEY_MESH:
839 struct ossl_gost_cipher_ctx *c =
840 EVP_CIPHER_CTX_get_cipher_data(ctx);
850 c->key_meshing = arg;
854 GOSTerr(GOST_F_GOST_CIPHER_CTL,
855 GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
861 /* Set cipher parameters from ASN1 structure */
862 int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
865 unsigned char *buf = NULL;
866 unsigned char *p = NULL;
867 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
868 GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
869 ASN1_OCTET_STRING *os = NULL;
871 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
874 if (!ASN1_OCTET_STRING_set
875 (gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
876 GOST_CIPHER_PARAMS_free(gcp);
877 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
880 ASN1_OBJECT_free(gcp->enc_param_set);
881 gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
883 len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
884 p = buf = OPENSSL_malloc(len);
886 GOST_CIPHER_PARAMS_free(gcp);
887 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
890 i2d_GOST_CIPHER_PARAMS(gcp, &p);
891 GOST_CIPHER_PARAMS_free(gcp);
893 os = ASN1_OCTET_STRING_new();
895 if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
897 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
902 ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
906 /* Store parameters into ASN1 structure */
907 int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
911 GOST_CIPHER_PARAMS *gcp = NULL;
913 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
916 if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
920 p = params->value.sequence->data;
922 gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
923 params->value.sequence->length);
925 len = gcp->iv->length;
926 if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
927 GOST_CIPHER_PARAMS_free(gcp);
928 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
932 nid = OBJ_obj2nid(gcp->enc_param_set);
933 if (nid == NID_undef) {
934 GOST_CIPHER_PARAMS_free(gcp);
935 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
936 GOST_R_INVALID_CIPHER_PARAM_OID);
940 if (!gost_cipher_set_param(c, nid)) {
941 GOST_CIPHER_PARAMS_free(gcp);
944 /*XXX missing non-const accessor */
945 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
946 EVP_CIPHER_CTX_iv_length(ctx));
948 GOST_CIPHER_PARAMS_free(gcp);
953 static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
955 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
956 memset(c->buffer, 0, sizeof(c->buffer));
957 memset(c->partial_block, 0, sizeof(c->partial_block));
962 gost_init(&(c->cctx), block);
966 static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
968 return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
971 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
973 return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
976 static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
977 const unsigned char *data)
979 unsigned char buffer[8];
981 * We are using local buffer for iv because CryptoPro doesn't interpret
982 * internal state of MAC algorithm as iv during keymeshing (but does
983 * initialize internal state from iv in key transport
985 assert(c->count % 8 == 0 && c->count <= 1024);
986 if (c->key_meshing && c->count == 1024) {
987 cryptopro_key_meshing(&(c->cctx), buffer);
989 mac_block(&(c->cctx), c->buffer, data);
990 c->count = c->count % 1024 + 8;
993 int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
995 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
996 const unsigned char *p = data;
997 size_t bytes = count, i;
999 GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
1002 if (c->bytes_left) {
1003 for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
1004 c->partial_block[i] = *p;
1007 mac_block_mesh(c, c->partial_block);
1014 mac_block_mesh(c, p);
1019 memcpy(c->partial_block, p, bytes);
1021 c->bytes_left = bytes;
1025 int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
1027 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1029 GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
1032 if (c->count == 0 && c->bytes_left) {
1033 unsigned char buffer[8];
1034 memset(buffer, 0, 8);
1035 gost_imit_update(ctx, buffer, 8);
1037 if (c->bytes_left) {
1039 for (i = c->bytes_left; i < 8; i++) {
1040 c->partial_block[i] = 0;
1042 mac_block_mesh(c, c->partial_block);
1044 get_mac(c->buffer, 8 * c->dgst_size, md);
1048 int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
1051 case EVP_MD_CTRL_KEY_LEN:
1052 *((unsigned int *)(ptr)) = 32;
1054 case EVP_MD_CTRL_SET_KEY:
1056 struct ossl_gost_imit_ctx *gost_imit_ctx =
1057 EVP_MD_CTX_md_data(ctx);
1059 if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
1060 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
1063 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
1066 struct gost_mac_key *key = (struct gost_mac_key *)ptr;
1067 if (key->mac_param_nid != NID_undef) {
1068 const struct gost_cipher_info *param =
1069 get_encryption_params(OBJ_nid2obj
1070 (key->mac_param_nid));
1071 if (param == NULL) {
1072 GOSTerr(GOST_F_GOST_IMIT_CTRL,
1073 GOST_R_INVALID_MAC_PARAMS);
1076 gost_init(&(gost_imit_ctx->cctx), param->sblock);
1078 gost_key(&(gost_imit_ctx->cctx), key->key);
1079 gost_imit_ctx->key_set = 1;
1082 } else if (arg == 32) {
1083 gost_key(&(gost_imit_ctx->cctx), ptr);
1084 gost_imit_ctx->key_set = 1;
1087 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
1090 case EVP_MD_CTRL_MAC_LEN:
1092 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1093 if (arg < 1 || arg > 8) {
1094 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
1106 int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
1108 if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
1109 memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
1110 sizeof(struct ossl_gost_imit_ctx));
1115 /* Clean up imit ctx */
1116 int gost_imit_cleanup(EVP_MD_CTX *ctx)
1118 memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));