1 /**********************************************************************
2 * gost_crypt.c - Initialize all ciphers *
4 * Copyright (c) 2005-2006 Cryptocom LTD *
5 * Copyright (c) 2020 Chikunov Vitaly <vt@altlinux.org> *
6 * This file is distributed under the same license as OpenSSL *
8 * OpenSSL interface to GOST 28147-89 cipher functions *
9 * Requires OpenSSL 0.9.9 for compilation *
10 **********************************************************************/
13 #include <openssl/err.h>
14 #include <openssl/rand.h>
15 #include "e_gost_err.h"
17 #include "gost_gost2015.h"
19 #if !defined(CCGOST_DEBUG) && !defined(DEBUG)
26 static int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
27 const unsigned char *iv, int enc);
28 static int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
29 const unsigned char *iv, int enc);
30 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
31 const unsigned char *iv, int enc);
32 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
33 const unsigned char *key,
34 const unsigned char *iv, int enc);
35 /* Handles block of data in CFB mode */
36 static int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
37 const unsigned char *in, size_t inl);
38 /* Handles block of data in CBC mode */
39 static int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
40 const unsigned char *in, size_t inl);
41 /* Handles block of data in CNT mode */
42 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
43 const unsigned char *in, size_t inl);
44 /* Cleanup function */
45 static int gost_cipher_cleanup(EVP_CIPHER_CTX *);
46 /* set/get cipher parameters */
47 static int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
48 static int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
49 /* Control function */
50 static int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
52 static int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
53 const unsigned char *iv, int enc);
54 static int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
55 const unsigned char *iv, int enc);
56 /* Handles block of data in CBC mode */
57 static int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
58 const unsigned char *in, size_t inl);
59 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
60 const unsigned char *in, size_t inl);
62 static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
63 const unsigned char *in, size_t inl);
65 /* set/get cipher parameters */
66 static int magma_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
67 static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
68 /* Control function */
69 static int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
70 static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
73 * Single level template accessor.
74 * Note: that you cannot template 0 value.
76 #define TPL(st,field) ( \
77 ((st)->field) ?: TPL_VAL(st,field) \
80 #define TPL_VAL(st,field) ( \
81 ((st)->template ? (st)->template->field : 0) \
84 EVP_CIPHER *GOST_init_cipher(GOST_cipher *c)
89 /* Some sanity checking. */
90 int flags = c->flags | TPL_VAL(c, flags);
91 int block_size = TPL(c, block_size);
92 switch (flags & EVP_CIPH_MODE) {
93 case EVP_CIPH_CTR_MODE:
94 case EVP_CIPH_CFB_MODE:
95 case EVP_CIPH_OFB_MODE:
96 OPENSSL_assert(block_size == 1);
97 OPENSSL_assert(flags & EVP_CIPH_NO_PADDING);
100 OPENSSL_assert(block_size != 1);
101 OPENSSL_assert(!(flags & EVP_CIPH_NO_PADDING));
105 OPENSSL_assert(flags & EVP_CIPH_CUSTOM_IV);
107 OPENSSL_assert(!(flags & EVP_CIPH_CUSTOM_IV));
110 if (!(cipher = EVP_CIPHER_meth_new(c->nid, block_size, TPL(c, key_len)))
111 || !EVP_CIPHER_meth_set_iv_length(cipher, TPL(c, iv_len))
112 || !EVP_CIPHER_meth_set_flags(cipher, flags)
113 || !EVP_CIPHER_meth_set_init(cipher, TPL(c, init))
114 || !EVP_CIPHER_meth_set_do_cipher(cipher, TPL(c, do_cipher))
115 || !EVP_CIPHER_meth_set_cleanup(cipher, TPL(c, cleanup))
116 || !EVP_CIPHER_meth_set_impl_ctx_size(cipher, TPL(c, ctx_size))
117 || !EVP_CIPHER_meth_set_set_asn1_params(cipher, TPL(c, set_asn1_parameters))
118 || !EVP_CIPHER_meth_set_get_asn1_params(cipher, TPL(c, get_asn1_parameters))
119 || !EVP_CIPHER_meth_set_ctrl(cipher, TPL(c, ctrl))) {
120 EVP_CIPHER_meth_free(cipher);
127 void GOST_deinit_cipher(GOST_cipher *c)
130 EVP_CIPHER_meth_free(c->cipher);
135 static GOST_cipher gost_template_cipher = {
139 .flags = EVP_CIPH_CUSTOM_IV |
141 EVP_CIPH_ALWAYS_CALL_INIT,
142 .cleanup = gost_cipher_cleanup,
143 .ctx_size = sizeof(struct ossl_gost_cipher_ctx),
144 .set_asn1_parameters = gost89_set_asn1_parameters,
145 .get_asn1_parameters = gost89_get_asn1_parameters,
146 .ctrl = gost_cipher_ctl,
149 GOST_cipher Gost28147_89_cipher = {
150 .nid = NID_id_Gost28147_89,
151 .template = &gost_template_cipher,
153 .flags = EVP_CIPH_CFB_MODE |
155 .init = gost_cipher_init,
156 .do_cipher = gost_cipher_do_cfb,
159 GOST_cipher Gost28147_89_cbc_cipher = {
160 .nid = NID_gost89_cbc,
161 .template = &gost_template_cipher,
162 .flags = EVP_CIPH_CBC_MODE,
163 .init = gost_cipher_init_cbc,
164 .do_cipher = gost_cipher_do_cbc,
167 GOST_cipher Gost28147_89_cnt_cipher = {
168 .nid = NID_gost89_cnt,
169 .template = &gost_template_cipher,
171 .flags = EVP_CIPH_OFB_MODE |
173 .init = gost_cipher_init_cpa,
174 .do_cipher = gost_cipher_do_cnt,
177 GOST_cipher Gost28147_89_cnt_12_cipher = {
178 .nid = NID_gost89_cnt_12,
179 .template = &gost_template_cipher,
181 .flags = EVP_CIPH_OFB_MODE |
183 .init = gost_cipher_init_cp_12,
184 .do_cipher = gost_cipher_do_cnt,
187 static GOST_cipher magma_template_cipher = {
191 .flags = EVP_CIPH_CUSTOM_IV |
193 EVP_CIPH_ALWAYS_CALL_INIT,
194 .cleanup = gost_cipher_cleanup,
195 .ctx_size = sizeof(struct ossl_gost_cipher_ctx),
196 .set_asn1_parameters = magma_set_asn1_parameters,
197 .get_asn1_parameters = magma_get_asn1_parameters,
198 .do_cipher = magma_cipher_do_ctr,
199 .ctrl = magma_cipher_ctl,
202 GOST_cipher magma_ctr_cipher = {
203 .nid = NID_magma_ctr,
204 .template = &magma_template_cipher,
207 .flags = EVP_CIPH_CTR_MODE |
209 .init = magma_cipher_init,
212 GOST_cipher magma_ctr_acpkm_cipher = {
213 .nid = NID_magma_ctr_acpkm,
214 .template = &magma_template_cipher,
217 .flags = EVP_CIPH_CTR_MODE |
219 .init = magma_cipher_init,
222 GOST_cipher magma_ctr_acpkm_omac_cipher = {
223 .nid = NID_magma_ctr_acpkm_omac,
224 .template = &magma_template_cipher,
227 .flags = EVP_CIPH_CTR_MODE |
228 EVP_CIPH_NO_PADDING |
229 EVP_CIPH_CUSTOM_COPY |
230 EVP_CIPH_FLAG_CUSTOM_CIPHER |
231 EVP_CIPH_FLAG_CIPHER_WITH_MAC,
232 .init = magma_cipher_init_ctr_acpkm_omac,
233 .do_cipher = magma_cipher_do_ctr_acpkm_omac,
234 .ctrl = magma_cipher_ctl_acpkm_omac,
237 GOST_cipher magma_cbc_cipher = {
238 .nid = NID_magma_cbc,
239 .template = &gost_template_cipher,
240 .flags = EVP_CIPH_CBC_MODE,
241 .init = magma_cipher_init,
242 .do_cipher = magma_cipher_do_cbc,
245 /* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */
246 /* Init functions which set specific parameters */
247 static int gost_imit_init_cpa(EVP_MD_CTX *ctx);
248 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx);
249 /* process block of data */
250 static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count);
251 /* Return computed value */
252 static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md);
254 static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
255 static int gost_imit_cleanup(EVP_MD_CTX *ctx);
256 /* Control function, knows how to set MAC key.*/
257 static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr);
259 GOST_digest Gost28147_89_MAC_digest = {
260 .nid = NID_id_Gost28147_89_MAC,
262 .input_blocksize = 8,
263 .app_datasize = sizeof(struct ossl_gost_imit_ctx),
264 .flags = EVP_MD_FLAG_XOF,
265 .init = gost_imit_init_cpa,
266 .update = gost_imit_update,
267 .final = gost_imit_final,
268 .copy = gost_imit_copy,
269 .cleanup = gost_imit_cleanup,
270 .ctrl = gost_imit_ctrl,
273 EVP_MD *imit_gost_cpa(void)
275 return GOST_init_digest(&Gost28147_89_MAC_digest);
278 void imit_gost_cpa_destroy(void)
280 GOST_deinit_digest(&Gost28147_89_MAC_digest);
283 GOST_digest Gost28147_89_mac_12_digest = {
284 .nid = NID_gost_mac_12,
286 .input_blocksize = 8,
287 .app_datasize = sizeof(struct ossl_gost_imit_ctx),
288 .flags = EVP_MD_FLAG_XOF,
289 .init = gost_imit_init_cp_12,
290 .update = gost_imit_update,
291 .final = gost_imit_final,
292 .copy = gost_imit_copy,
293 .cleanup = gost_imit_cleanup,
294 .ctrl = gost_imit_ctrl,
297 EVP_MD *imit_gost_cp_12(void)
299 return GOST_init_digest(&Gost28147_89_mac_12_digest);
302 void imit_gost_cp_12_destroy(void)
304 GOST_deinit_digest(&Gost28147_89_mac_12_digest);
308 * Correspondence between gost parameter OIDs and substitution blocks
309 * NID field is filed by register_gost_NID function in engine.c
310 * upon engine initialization
313 struct gost_cipher_info gost_cipher_list[] = {
320 * {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
322 {NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
324 {NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
326 {NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
328 {NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
330 {NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
331 {NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
336 * get encryption parameters from crypto network settings FIXME For now we
337 * use environment var CRYPT_PARAMS as place to store these settings.
338 * Actually, it is better to use engine control command, read from
339 * configuration file to set them
341 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
344 struct gost_cipher_info *param;
346 const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
347 if (!params || !strlen(params)) {
349 for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
350 if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
351 return &gost_cipher_list[i];
352 return &gost_cipher_list[0];
355 nid = OBJ_txt2nid(params);
356 if (nid == NID_undef) {
357 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
358 GOST_R_INVALID_CIPHER_PARAM_OID);
359 ERR_add_error_data(3, "Unsupported CRYPT_PARAMS='",
360 params, "' specified in environment or in config");
364 nid = OBJ_obj2nid(obj);
366 for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
368 if (!param->sblock) {
369 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
375 /* Sets cipher param from paramset NID. */
376 static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
378 const struct gost_cipher_info *param;
379 param = get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
383 c->paramNID = param->nid;
384 c->key_meshing = param->key_meshing;
386 gost_init(&(c->cctx), param->sblock);
390 /* Initializes EVP_CIPHER_CTX by paramset NID */
391 static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
392 const unsigned char *key,
393 const unsigned char *iv, int enc,
394 int paramNID, int mode)
396 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
397 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
398 if (!gost_cipher_set_param(c, paramNID))
400 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
403 gost_key(&(c->cctx), key);
405 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
406 EVP_CIPHER_CTX_iv_length(ctx));
408 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
409 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
413 static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
414 const unsigned char *key,
415 const unsigned char *iv,
416 gost_subst_block * block)
418 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
419 gost_init(&(c->cctx), block);
423 gost_key(&(c->cctx), key);
425 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
426 EVP_CIPHER_CTX_iv_length(ctx));
428 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
429 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
433 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
434 const unsigned char *iv, int enc)
436 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
439 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
440 const unsigned char *key,
441 const unsigned char *iv, int enc)
443 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
446 /* Initializes EVP_CIPHER_CTX with default values */
447 int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
448 const unsigned char *iv, int enc)
450 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
454 /* Initializes EVP_CIPHER_CTX with default values */
455 int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
456 const unsigned char *iv, int enc)
458 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
462 /* Initializes EVP_CIPHER_CTX with default values */
463 int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
464 const unsigned char *iv, int enc)
466 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
467 /* FIXME this is just initializtion check */
468 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
469 if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
471 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
474 if (init_zero_kdf_seed(c->kdf_seed) == 0)
480 magma_key(&(c->cctx), key);
482 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
483 EVP_CIPHER_CTX_iv_length(ctx));
485 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
486 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
488 if (EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm
489 || EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm_omac) {
490 c->key_meshing = 1024;
498 /* Initializes EVP_CIPHER_CTX with default values */
499 int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
500 const unsigned char *iv, int enc)
503 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
504 unsigned char cipher_key[32];
505 c->omac_ctx = EVP_MD_CTX_new();
507 if (c->omac_ctx == NULL) {
508 GOSTerr(GOST_F_MAGMA_CIPHER_INIT_CTR_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
512 if (gost2015_acpkm_omac_init(NID_magma_mac, enc, key,
513 c->omac_ctx, cipher_key, c->kdf_seed) != 1) {
514 EVP_MD_CTX_free(c->omac_ctx);
519 return magma_cipher_init(ctx, cipher_key, iv, enc);
522 return magma_cipher_init(ctx, key, iv, enc);
526 * Wrapper around gostcrypt function from gost89.c which perform key meshing
529 static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
531 struct ossl_gost_cipher_ctx *c = ctx;
532 assert(c->count % 8 == 0 && c->count <= 1024);
533 if (c->key_meshing && c->count == 1024) {
534 cryptopro_key_meshing(&(c->cctx), iv);
536 gostcrypt(&(c->cctx), iv, buf);
537 c->count = c->count % 1024 + 8;
540 static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
542 struct ossl_gost_cipher_ctx *c = ctx;
544 unsigned char buf1[8];
545 assert(c->count % 8 == 0 && c->count <= 1024);
546 if (c->key_meshing && c->count == 1024) {
547 cryptopro_key_meshing(&(c->cctx), iv);
550 gostcrypt(&(c->cctx), iv, buf1);
554 g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
556 buf1[0] = (unsigned char)(g & 0xff);
557 buf1[1] = (unsigned char)((g >> 8) & 0xff);
558 buf1[2] = (unsigned char)((g >> 16) & 0xff);
559 buf1[3] = (unsigned char)((g >> 24) & 0xff);
560 g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
563 if (go > g) /* overflow */
565 buf1[4] = (unsigned char)(g & 0xff);
566 buf1[5] = (unsigned char)((g >> 8) & 0xff);
567 buf1[6] = (unsigned char)((g >> 16) & 0xff);
568 buf1[7] = (unsigned char)((g >> 24) & 0xff);
570 gostcrypt(&(c->cctx), buf1, buf);
571 c->count = c->count % 1024 + 8;
574 /* GOST encryption in CBC mode */
575 int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
576 const unsigned char *in, size_t inl)
579 const unsigned char *in_ptr = in;
580 unsigned char *out_ptr = out;
582 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
583 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
584 if (EVP_CIPHER_CTX_encrypting(ctx)) {
587 for (i = 0; i < 8; i++) {
588 b[i] = iv[i] ^ in_ptr[i];
590 gostcrypt(&(c->cctx), b, out_ptr);
591 memcpy(iv, out_ptr, 8);
598 gostdecrypt(&(c->cctx), in_ptr, b);
599 for (i = 0; i < 8; i++) {
600 out_ptr[i] = iv[i] ^ b[i];
602 memcpy(iv, in_ptr, 8);
611 /* MAGMA encryption in CBC mode */
612 int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
613 const unsigned char *in, size_t inl)
617 const unsigned char *in_ptr = in;
618 unsigned char *out_ptr = out;
620 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
621 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
622 if (EVP_CIPHER_CTX_encrypting(ctx)) {
625 for (i = 0; i < 8; i++) {
626 b[7 - i] = iv[i] ^ in_ptr[i];
628 gostcrypt(&(c->cctx), b, d);
630 for (i = 0; i < 8; i++) {
631 out_ptr[7 - i] = d[i];
633 memcpy(iv, out_ptr, 8);
640 for (i = 0; i < 8; i++) {
641 d[7 - i] = in_ptr[i];
643 gostdecrypt(&(c->cctx), d, b);
644 memcpy(d, in_ptr, 8);
645 for (i = 0; i < 8; i++) {
646 out_ptr[i] = iv[i] ^ b[7 - i];
657 /* increment counter (64-bit int) by 1 */
658 static void ctr64_inc(unsigned char *counter)
660 inc_counter(counter, 8);
663 /* MAGMA encryption in CTR mode */
664 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
665 const unsigned char *in, size_t inl)
667 const unsigned char *in_ptr = in;
668 unsigned char *out_ptr = out;
671 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
672 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
673 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
675 /* Process partial blocks */
676 if (EVP_CIPHER_CTX_num(ctx)) {
677 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
678 j++, i++, in_ptr++, out_ptr++) {
679 *out_ptr = buf[7 - j] ^ (*in_ptr);
682 EVP_CIPHER_CTX_set_num(ctx, 0);
684 EVP_CIPHER_CTX_set_num(ctx, j);
689 /* Process full blocks */
690 for (; i + 8 <= inl; i += 8, in_ptr += 8, out_ptr += 8) {
691 for (j = 0; j < 8; j++) {
694 gostcrypt(&(c->cctx), b, buf);
695 for (j = 0; j < 8; j++) {
696 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
700 if (c->key_meshing && (c->count % c->key_meshing == 0))
701 acpkm_magma_key_meshing(&(c->cctx));
704 /* Process the rest of plaintext */
706 for (j = 0; j < 8; j++) {
709 gostcrypt(&(c->cctx), b, buf);
711 for (j = 0; i < inl; j++, i++) {
712 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
717 if (c->key_meshing && (c->count % c->key_meshing == 0))
718 acpkm_magma_key_meshing(&(c->cctx));
720 EVP_CIPHER_CTX_set_num(ctx, j);
722 EVP_CIPHER_CTX_set_num(ctx, 0);
728 /* MAGMA encryption in CTR mode */
729 static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
730 const unsigned char *in, size_t inl)
732 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
734 if (in == NULL && inl == 0) /* Final call */
735 return gost2015_final_call(ctx, c->omac_ctx, MAGMA_MAC_MAX_SIZE, c->tag, magma_cipher_do_ctr);
740 /* As in and out can be the same pointer, process unencrypted here */
741 if (EVP_CIPHER_CTX_encrypting(ctx))
742 EVP_DigestSignUpdate(c->omac_ctx, in, inl);
744 if (magma_cipher_do_ctr(ctx, out, in, inl) != inl)
747 /* As in and out can be the same pointer, process decrypted here */
748 if (!EVP_CIPHER_CTX_encrypting(ctx))
749 EVP_DigestSignUpdate(c->omac_ctx, out, inl);
753 /* GOST encryption in CFB mode */
754 int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
755 const unsigned char *in, size_t inl)
757 const unsigned char *in_ptr = in;
758 unsigned char *out_ptr = out;
761 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
762 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
763 /* process partial block if any */
764 if (EVP_CIPHER_CTX_num(ctx)) {
765 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
766 j++, i++, in_ptr++, out_ptr++) {
767 if (!EVP_CIPHER_CTX_encrypting(ctx))
768 buf[j + 8] = *in_ptr;
769 *out_ptr = buf[j] ^ (*in_ptr);
770 if (EVP_CIPHER_CTX_encrypting(ctx))
771 buf[j + 8] = *out_ptr;
774 memcpy(iv, buf + 8, 8);
775 EVP_CIPHER_CTX_set_num(ctx, 0);
777 EVP_CIPHER_CTX_set_num(ctx, j);
782 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
784 * block cipher current iv
786 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
788 * xor next block of input text with it and output it
793 if (!EVP_CIPHER_CTX_encrypting(ctx))
794 memcpy(iv, in_ptr, 8);
795 for (j = 0; j < 8; j++) {
796 out_ptr[j] = buf[j] ^ in_ptr[j];
799 /* Next iv is next block of cipher text */
800 if (EVP_CIPHER_CTX_encrypting(ctx))
801 memcpy(iv, out_ptr, 8);
803 /* Process rest of buffer */
805 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
806 if (!EVP_CIPHER_CTX_encrypting(ctx))
807 memcpy(buf + 8, in_ptr, inl - i);
808 for (j = 0; i < inl; j++, i++) {
809 out_ptr[j] = buf[j] ^ in_ptr[j];
811 EVP_CIPHER_CTX_set_num(ctx, j);
812 if (EVP_CIPHER_CTX_encrypting(ctx))
813 memcpy(buf + 8, out_ptr, j);
815 EVP_CIPHER_CTX_set_num(ctx, 0);
820 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
821 const unsigned char *in, size_t inl)
823 const unsigned char *in_ptr = in;
824 unsigned char *out_ptr = out;
827 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
828 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
829 /* process partial block if any */
830 if (EVP_CIPHER_CTX_num(ctx)) {
831 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
832 j++, i++, in_ptr++, out_ptr++) {
833 *out_ptr = buf[j] ^ (*in_ptr);
836 EVP_CIPHER_CTX_set_num(ctx, 0);
838 EVP_CIPHER_CTX_set_num(ctx, j);
843 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
845 * block cipher current iv
848 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
850 * xor next block of input text with it and output it
855 for (j = 0; j < 8; j++) {
856 out_ptr[j] = buf[j] ^ in_ptr[j];
859 /* Process rest of buffer */
861 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
862 for (j = 0; i < inl; j++, i++) {
863 out_ptr[j] = buf[j] ^ in_ptr[j];
865 EVP_CIPHER_CTX_set_num(ctx, j);
867 EVP_CIPHER_CTX_set_num(ctx, 0);
872 /* Cleaning up of EVP_CIPHER_CTX */
873 int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
875 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
876 EVP_MD_CTX_free(c->omac_ctx);
877 gost_destroy(&(c->cctx));
878 EVP_CIPHER_CTX_set_app_data(ctx, NULL);
882 /* Control function for gost cipher */
883 int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
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, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
965 /* Control function for gost cipher */
966 int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
969 case EVP_CTRL_RAND_KEY:
971 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
972 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
976 case EVP_CTRL_KEY_MESH:
978 struct ossl_gost_cipher_ctx *c =
979 EVP_CIPHER_CTX_get_cipher_data(ctx);
989 c->key_meshing = arg;
993 GOSTerr(GOST_F_MAGMA_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
999 static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1003 case EVP_CTRL_PROCESS_UNPROTECTED:
1005 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1006 STACK_OF(X509_ATTRIBUTE) *x = ptr;
1007 return gost2015_process_unprotected_attributes(x, arg, MAGMA_MAC_MAX_SIZE, c->tag);
1009 case EVP_CTRL_COPY: {
1010 EVP_CIPHER_CTX *out = ptr;
1011 struct ossl_gost_cipher_ctx *in_cctx = EVP_CIPHER_CTX_get_cipher_data(ctx);
1012 struct ossl_gost_cipher_ctx *out_cctx = EVP_CIPHER_CTX_get_cipher_data(out);
1014 if (in_cctx->omac_ctx == out_cctx->omac_ctx) {
1015 out_cctx->omac_ctx = EVP_MD_CTX_new();
1016 if (out_cctx->omac_ctx == NULL) {
1017 GOSTerr(GOST_F_MAGMA_CIPHER_CTL_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
1021 return EVP_MD_CTX_copy(out_cctx->omac_ctx, in_cctx->omac_ctx);
1024 return magma_cipher_ctl(ctx, type, arg, ptr);
1029 /* Set cipher parameters from ASN1 structure */
1030 int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1033 unsigned char *buf = NULL;
1034 unsigned char *p = NULL;
1035 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1036 GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
1037 ASN1_OCTET_STRING *os = NULL;
1039 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1042 if (!ASN1_OCTET_STRING_set
1043 (gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
1044 GOST_CIPHER_PARAMS_free(gcp);
1045 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1048 ASN1_OBJECT_free(gcp->enc_param_set);
1049 gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
1051 len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
1052 p = buf = OPENSSL_malloc(len);
1054 GOST_CIPHER_PARAMS_free(gcp);
1055 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1058 i2d_GOST_CIPHER_PARAMS(gcp, &p);
1059 GOST_CIPHER_PARAMS_free(gcp);
1061 os = ASN1_OCTET_STRING_new();
1063 if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
1065 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1070 ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
1074 /* Store parameters into ASN1 structure */
1075 int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1078 GOST_CIPHER_PARAMS *gcp = NULL;
1080 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1083 if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
1087 p = params->value.sequence->data;
1089 gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
1090 params->value.sequence->length);
1092 len = gcp->iv->length;
1093 if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
1094 GOST_CIPHER_PARAMS_free(gcp);
1095 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
1099 nid = OBJ_obj2nid(gcp->enc_param_set);
1100 if (nid == NID_undef) {
1101 GOST_CIPHER_PARAMS_free(gcp);
1102 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
1103 GOST_R_INVALID_CIPHER_PARAM_OID);
1107 if (!gost_cipher_set_param(c, nid)) {
1108 GOST_CIPHER_PARAMS_free(gcp);
1111 /*XXX missing non-const accessor */
1112 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
1113 EVP_CIPHER_CTX_iv_length(ctx));
1115 GOST_CIPHER_PARAMS_free(gcp);
1120 #define MAGMA_UKM_LEN 12
1121 static int magma_set_asn1_parameters (EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1123 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1124 c->key_meshing = 8192;
1126 return gost2015_set_asn1_params(params, EVP_CIPHER_CTX_original_iv(ctx), 4,
1130 static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1132 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1133 unsigned char iv[16];
1135 c->key_meshing = 8192;
1137 if (gost2015_get_asn1_params(params, MAGMA_UKM_LEN, iv, 4, c->kdf_seed) < 0)
1140 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, sizeof(iv));
1141 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv, sizeof(iv));
1142 /* Key meshing 8 kb*/
1143 c->key_meshing = 8192;
1148 static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
1150 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1151 memset(c->buffer, 0, sizeof(c->buffer));
1152 memset(c->partial_block, 0, sizeof(c->partial_block));
1157 gost_init(&(c->cctx), block);
1161 static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
1163 return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
1166 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
1168 return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
1171 static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
1172 const unsigned char *data)
1175 * We are using NULL for iv because CryptoPro doesn't interpret
1176 * internal state of MAC algorithm as iv during keymeshing (but does
1177 * initialize internal state from iv in key transport
1179 assert(c->count % 8 == 0 && c->count <= 1024);
1180 if (c->key_meshing && c->count == 1024) {
1181 cryptopro_key_meshing(&(c->cctx), NULL);
1183 mac_block(&(c->cctx), c->buffer, data);
1184 c->count = c->count % 1024 + 8;
1187 int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
1189 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1190 const unsigned char *p = data;
1191 size_t bytes = count;
1192 if (!(c->key_set)) {
1193 GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
1196 if (c->bytes_left) {
1198 for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
1199 c->partial_block[i] = *p;
1202 mac_block_mesh(c, c->partial_block);
1209 mac_block_mesh(c, p);
1214 memcpy(c->partial_block, p, bytes);
1216 c->bytes_left = bytes;
1220 int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
1222 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1224 GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
1227 if (c->count == 0 && c->bytes_left) {
1228 unsigned char buffer[8];
1229 memset(buffer, 0, 8);
1230 gost_imit_update(ctx, buffer, 8);
1232 if (c->bytes_left) {
1234 for (i = c->bytes_left; i < 8; i++) {
1235 c->partial_block[i] = 0;
1237 mac_block_mesh(c, c->partial_block);
1239 get_mac(c->buffer, 8 * c->dgst_size, md);
1243 int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
1246 case EVP_MD_CTRL_KEY_LEN:
1247 *((unsigned int *)(ptr)) = 32;
1249 case EVP_MD_CTRL_SET_KEY:
1251 struct ossl_gost_imit_ctx *gost_imit_ctx = EVP_MD_CTX_md_data(ctx);
1253 if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
1254 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
1257 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
1260 struct gost_mac_key *key = (struct gost_mac_key *)ptr;
1261 if (key->mac_param_nid != NID_undef) {
1262 const struct gost_cipher_info *param =
1263 get_encryption_params(OBJ_nid2obj(key->mac_param_nid));
1264 if (param == NULL) {
1265 GOSTerr(GOST_F_GOST_IMIT_CTRL,
1266 GOST_R_INVALID_MAC_PARAMS);
1269 gost_init(&(gost_imit_ctx->cctx), param->sblock);
1271 gost_key(&(gost_imit_ctx->cctx), key->key);
1272 gost_imit_ctx->key_set = 1;
1275 } else if (arg == 32) {
1276 gost_key(&(gost_imit_ctx->cctx), ptr);
1277 gost_imit_ctx->key_set = 1;
1280 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
1283 case EVP_MD_CTRL_XOF_LEN:
1285 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1286 if (arg < 1 || arg > 8) {
1287 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
1299 int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
1301 if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
1302 memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
1303 sizeof(struct ossl_gost_imit_ctx));
1308 /* Clean up imit ctx */
1309 int gost_imit_cleanup(EVP_MD_CTX *ctx)
1311 memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));
1314 /* vim: set expandtab cinoptions=\:0,l1,t0,g0,(0 sw=4 : */