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 static EVP_MD *_hidden_Gost28147_89_MAC_md = NULL;
260 static EVP_MD *_hidden_Gost28147_89_12_MAC_md = NULL;
262 EVP_MD *imit_gost_cpa(void)
264 if (_hidden_Gost28147_89_MAC_md == NULL) {
267 if ((md = EVP_MD_meth_new(NID_id_Gost28147_89_MAC, NID_undef)) == NULL
268 || !EVP_MD_meth_set_result_size(md, 4)
269 || !EVP_MD_meth_set_input_blocksize(md, 8)
270 || !EVP_MD_meth_set_app_datasize(md,
271 sizeof(struct ossl_gost_imit_ctx))
272 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
273 || !EVP_MD_meth_set_init(md, gost_imit_init_cpa)
274 || !EVP_MD_meth_set_update(md, gost_imit_update)
275 || !EVP_MD_meth_set_final(md, gost_imit_final)
276 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
277 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
278 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
279 EVP_MD_meth_free(md);
282 _hidden_Gost28147_89_MAC_md = md;
284 return _hidden_Gost28147_89_MAC_md;
287 void imit_gost_cpa_destroy(void)
289 EVP_MD_meth_free(_hidden_Gost28147_89_MAC_md);
290 _hidden_Gost28147_89_MAC_md = NULL;
293 EVP_MD *imit_gost_cp_12(void)
295 if (_hidden_Gost28147_89_12_MAC_md == NULL) {
298 if ((md = EVP_MD_meth_new(NID_gost_mac_12, NID_undef)) == NULL
299 || !EVP_MD_meth_set_result_size(md, 4)
300 || !EVP_MD_meth_set_input_blocksize(md, 8)
301 || !EVP_MD_meth_set_app_datasize(md,
302 sizeof(struct ossl_gost_imit_ctx))
303 || !EVP_MD_meth_set_flags(md, EVP_MD_FLAG_XOF)
304 || !EVP_MD_meth_set_init(md, gost_imit_init_cp_12)
305 || !EVP_MD_meth_set_update(md, gost_imit_update)
306 || !EVP_MD_meth_set_final(md, gost_imit_final)
307 || !EVP_MD_meth_set_copy(md, gost_imit_copy)
308 || !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
309 || !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
310 EVP_MD_meth_free(md);
313 _hidden_Gost28147_89_12_MAC_md = md;
315 return _hidden_Gost28147_89_12_MAC_md;
318 void imit_gost_cp_12_destroy(void)
320 EVP_MD_meth_free(_hidden_Gost28147_89_12_MAC_md);
321 _hidden_Gost28147_89_12_MAC_md = NULL;
325 * Correspondence between gost parameter OIDs and substitution blocks
326 * NID field is filed by register_gost_NID function in engine.c
327 * upon engine initialization
330 struct gost_cipher_info gost_cipher_list[] = {
337 * {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
339 {NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
341 {NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
343 {NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
345 {NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
347 {NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
348 {NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
353 * get encryption parameters from crypto network settings FIXME For now we
354 * use environment var CRYPT_PARAMS as place to store these settings.
355 * Actually, it is better to use engine control command, read from
356 * configuration file to set them
358 const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
361 struct gost_cipher_info *param;
363 const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
364 if (!params || !strlen(params)) {
366 for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
367 if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
368 return &gost_cipher_list[i];
369 return &gost_cipher_list[0];
372 nid = OBJ_txt2nid(params);
373 if (nid == NID_undef) {
374 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
375 GOST_R_INVALID_CIPHER_PARAM_OID);
376 ERR_add_error_data(3, "Unsupported CRYPT_PARAMS='",
377 params, "' specified in environment or in config");
381 nid = OBJ_obj2nid(obj);
383 for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
385 if (!param->sblock) {
386 GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
392 /* Sets cipher param from paramset NID. */
393 static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
395 const struct gost_cipher_info *param;
396 param = get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
400 c->paramNID = param->nid;
401 c->key_meshing = param->key_meshing;
403 gost_init(&(c->cctx), param->sblock);
407 /* Initializes EVP_CIPHER_CTX by paramset NID */
408 static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
409 const unsigned char *key,
410 const unsigned char *iv, int enc,
411 int paramNID, int mode)
413 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
414 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
415 if (!gost_cipher_set_param(c, paramNID))
417 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
420 gost_key(&(c->cctx), key);
422 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
423 EVP_CIPHER_CTX_iv_length(ctx));
425 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
426 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
430 static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
431 const unsigned char *key,
432 const unsigned char *iv,
433 gost_subst_block * block)
435 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
436 gost_init(&(c->cctx), block);
440 gost_key(&(c->cctx), key);
442 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
443 EVP_CIPHER_CTX_iv_length(ctx));
445 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
446 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
450 static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
451 const unsigned char *iv, int enc)
453 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
456 static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
457 const unsigned char *key,
458 const unsigned char *iv, int enc)
460 return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
463 /* Initializes EVP_CIPHER_CTX with default values */
464 int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
465 const unsigned char *iv, int enc)
467 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
471 /* Initializes EVP_CIPHER_CTX with default values */
472 int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
473 const unsigned char *iv, int enc)
475 return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
479 /* Initializes EVP_CIPHER_CTX with default values */
480 int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
481 const unsigned char *iv, int enc)
483 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
484 /* FIXME this is just initializtion check */
485 if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
486 if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
488 EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
491 if (init_zero_kdf_seed(c->kdf_seed) == 0)
497 magma_key(&(c->cctx), key);
499 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
500 EVP_CIPHER_CTX_iv_length(ctx));
502 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
503 EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
505 if (EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm
506 || EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm_omac) {
507 c->key_meshing = 1024;
515 /* Initializes EVP_CIPHER_CTX with default values */
516 int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
517 const unsigned char *iv, int enc)
520 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
521 unsigned char cipher_key[32];
522 c->omac_ctx = EVP_MD_CTX_new();
524 if (c->omac_ctx == NULL) {
525 GOSTerr(GOST_F_MAGMA_CIPHER_INIT_CTR_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
529 if (gost2015_acpkm_omac_init(NID_magma_mac, enc, key,
530 c->omac_ctx, cipher_key, c->kdf_seed) != 1) {
531 EVP_MD_CTX_free(c->omac_ctx);
536 return magma_cipher_init(ctx, cipher_key, iv, enc);
539 return magma_cipher_init(ctx, key, iv, enc);
543 * Wrapper around gostcrypt function from gost89.c which perform key meshing
546 static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
548 struct ossl_gost_cipher_ctx *c = ctx;
549 assert(c->count % 8 == 0 && c->count <= 1024);
550 if (c->key_meshing && c->count == 1024) {
551 cryptopro_key_meshing(&(c->cctx), iv);
553 gostcrypt(&(c->cctx), iv, buf);
554 c->count = c->count % 1024 + 8;
557 static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
559 struct ossl_gost_cipher_ctx *c = ctx;
561 unsigned char buf1[8];
562 assert(c->count % 8 == 0 && c->count <= 1024);
563 if (c->key_meshing && c->count == 1024) {
564 cryptopro_key_meshing(&(c->cctx), iv);
567 gostcrypt(&(c->cctx), iv, buf1);
571 g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
573 buf1[0] = (unsigned char)(g & 0xff);
574 buf1[1] = (unsigned char)((g >> 8) & 0xff);
575 buf1[2] = (unsigned char)((g >> 16) & 0xff);
576 buf1[3] = (unsigned char)((g >> 24) & 0xff);
577 g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
580 if (go > g) /* overflow */
582 buf1[4] = (unsigned char)(g & 0xff);
583 buf1[5] = (unsigned char)((g >> 8) & 0xff);
584 buf1[6] = (unsigned char)((g >> 16) & 0xff);
585 buf1[7] = (unsigned char)((g >> 24) & 0xff);
587 gostcrypt(&(c->cctx), buf1, buf);
588 c->count = c->count % 1024 + 8;
591 /* GOST encryption in CBC mode */
592 int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
593 const unsigned char *in, size_t inl)
596 const unsigned char *in_ptr = in;
597 unsigned char *out_ptr = out;
599 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
600 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
601 if (EVP_CIPHER_CTX_encrypting(ctx)) {
604 for (i = 0; i < 8; i++) {
605 b[i] = iv[i] ^ in_ptr[i];
607 gostcrypt(&(c->cctx), b, out_ptr);
608 memcpy(iv, out_ptr, 8);
615 gostdecrypt(&(c->cctx), in_ptr, b);
616 for (i = 0; i < 8; i++) {
617 out_ptr[i] = iv[i] ^ b[i];
619 memcpy(iv, in_ptr, 8);
628 /* MAGMA encryption in CBC mode */
629 int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
630 const unsigned char *in, size_t inl)
634 const unsigned char *in_ptr = in;
635 unsigned char *out_ptr = out;
637 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
638 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
639 if (EVP_CIPHER_CTX_encrypting(ctx)) {
642 for (i = 0; i < 8; i++) {
643 b[7 - i] = iv[i] ^ in_ptr[i];
645 gostcrypt(&(c->cctx), b, d);
647 for (i = 0; i < 8; i++) {
648 out_ptr[7 - i] = d[i];
650 memcpy(iv, out_ptr, 8);
657 for (i = 0; i < 8; i++) {
658 d[7 - i] = in_ptr[i];
660 gostdecrypt(&(c->cctx), d, b);
661 memcpy(d, in_ptr, 8);
662 for (i = 0; i < 8; i++) {
663 out_ptr[i] = iv[i] ^ b[7 - i];
674 /* increment counter (64-bit int) by 1 */
675 static void ctr64_inc(unsigned char *counter)
677 inc_counter(counter, 8);
680 /* MAGMA encryption in CTR mode */
681 static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
682 const unsigned char *in, size_t inl)
684 const unsigned char *in_ptr = in;
685 unsigned char *out_ptr = out;
688 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
689 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
690 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
692 /* Process partial blocks */
693 if (EVP_CIPHER_CTX_num(ctx)) {
694 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
695 j++, i++, in_ptr++, out_ptr++) {
696 *out_ptr = buf[7 - j] ^ (*in_ptr);
699 EVP_CIPHER_CTX_set_num(ctx, 0);
701 EVP_CIPHER_CTX_set_num(ctx, j);
706 /* Process full blocks */
707 for (; i + 8 <= inl; i += 8, in_ptr += 8, out_ptr += 8) {
708 for (j = 0; j < 8; j++) {
711 gostcrypt(&(c->cctx), b, buf);
712 for (j = 0; j < 8; j++) {
713 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));
721 /* Process the rest of plaintext */
723 for (j = 0; j < 8; j++) {
726 gostcrypt(&(c->cctx), b, buf);
728 for (j = 0; i < inl; j++, i++) {
729 out_ptr[j] = buf[7 - j] ^ in_ptr[j];
734 if (c->key_meshing && (c->count % c->key_meshing == 0))
735 acpkm_magma_key_meshing(&(c->cctx));
737 EVP_CIPHER_CTX_set_num(ctx, j);
739 EVP_CIPHER_CTX_set_num(ctx, 0);
745 /* MAGMA encryption in CTR mode */
746 static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
747 const unsigned char *in, size_t inl)
749 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
751 if (in == NULL && inl == 0) /* Final call */
752 return gost2015_final_call(ctx, c->omac_ctx, MAGMA_MAC_MAX_SIZE, c->tag, magma_cipher_do_ctr);
757 /* As in and out can be the same pointer, process unencrypted here */
758 if (EVP_CIPHER_CTX_encrypting(ctx))
759 EVP_DigestSignUpdate(c->omac_ctx, in, inl);
761 if (magma_cipher_do_ctr(ctx, out, in, inl) != inl)
764 /* As in and out can be the same pointer, process decrypted here */
765 if (!EVP_CIPHER_CTX_encrypting(ctx))
766 EVP_DigestSignUpdate(c->omac_ctx, out, inl);
770 /* GOST encryption in CFB mode */
771 int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
772 const unsigned char *in, size_t inl)
774 const unsigned char *in_ptr = in;
775 unsigned char *out_ptr = out;
778 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
779 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
780 /* process partial block if any */
781 if (EVP_CIPHER_CTX_num(ctx)) {
782 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
783 j++, i++, in_ptr++, out_ptr++) {
784 if (!EVP_CIPHER_CTX_encrypting(ctx))
785 buf[j + 8] = *in_ptr;
786 *out_ptr = buf[j] ^ (*in_ptr);
787 if (EVP_CIPHER_CTX_encrypting(ctx))
788 buf[j + 8] = *out_ptr;
791 memcpy(iv, buf + 8, 8);
792 EVP_CIPHER_CTX_set_num(ctx, 0);
794 EVP_CIPHER_CTX_set_num(ctx, j);
799 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
801 * block cipher current iv
803 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
805 * xor next block of input text with it and output it
810 if (!EVP_CIPHER_CTX_encrypting(ctx))
811 memcpy(iv, in_ptr, 8);
812 for (j = 0; j < 8; j++) {
813 out_ptr[j] = buf[j] ^ in_ptr[j];
816 /* Next iv is next block of cipher text */
817 if (EVP_CIPHER_CTX_encrypting(ctx))
818 memcpy(iv, out_ptr, 8);
820 /* Process rest of buffer */
822 gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
823 if (!EVP_CIPHER_CTX_encrypting(ctx))
824 memcpy(buf + 8, in_ptr, inl - i);
825 for (j = 0; i < inl; j++, i++) {
826 out_ptr[j] = buf[j] ^ in_ptr[j];
828 EVP_CIPHER_CTX_set_num(ctx, j);
829 if (EVP_CIPHER_CTX_encrypting(ctx))
830 memcpy(buf + 8, out_ptr, j);
832 EVP_CIPHER_CTX_set_num(ctx, 0);
837 static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
838 const unsigned char *in, size_t inl)
840 const unsigned char *in_ptr = in;
841 unsigned char *out_ptr = out;
844 unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
845 unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
846 /* process partial block if any */
847 if (EVP_CIPHER_CTX_num(ctx)) {
848 for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
849 j++, i++, in_ptr++, out_ptr++) {
850 *out_ptr = buf[j] ^ (*in_ptr);
853 EVP_CIPHER_CTX_set_num(ctx, 0);
855 EVP_CIPHER_CTX_set_num(ctx, j);
860 for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
862 * block cipher current iv
865 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
867 * xor next block of input text with it and output it
872 for (j = 0; j < 8; j++) {
873 out_ptr[j] = buf[j] ^ in_ptr[j];
876 /* Process rest of buffer */
878 gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
879 for (j = 0; i < inl; j++, i++) {
880 out_ptr[j] = buf[j] ^ in_ptr[j];
882 EVP_CIPHER_CTX_set_num(ctx, j);
884 EVP_CIPHER_CTX_set_num(ctx, 0);
889 /* Cleaning up of EVP_CIPHER_CTX */
890 int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
892 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
893 EVP_MD_CTX_free(c->omac_ctx);
894 gost_destroy(&(c->cctx));
895 EVP_CIPHER_CTX_set_app_data(ctx, NULL);
899 /* Control function for gost cipher */
900 int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
903 case EVP_CTRL_RAND_KEY:
906 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
907 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
912 case EVP_CTRL_PBE_PRF_NID:
914 const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
915 int nid = NID_id_tc26_hmac_gost_3411_2012_512;
918 if (!strcmp("md_gost12_256", params))
919 nid = NID_id_tc26_hmac_gost_3411_2012_256;
920 else if (!strcmp("md_gost12_512", params))
921 nid = NID_id_tc26_hmac_gost_3411_2012_512;
922 else if (!strcmp("md_gost94", params))
923 nid = NID_id_HMACGostR3411_94;
931 case EVP_CTRL_SET_SBOX:
933 struct ossl_gost_cipher_ctx *c =
934 EVP_CIPHER_CTX_get_cipher_data(ctx);
947 nid = OBJ_txt2nid(ptr);
948 if (nid == NID_undef) {
952 cur_meshing = c->key_meshing;
953 ret = gost_cipher_set_param(c, nid);
954 c->key_meshing = cur_meshing;
959 case EVP_CTRL_KEY_MESH:
961 struct ossl_gost_cipher_ctx *c =
962 EVP_CIPHER_CTX_get_cipher_data(ctx);
972 c->key_meshing = arg;
976 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
982 /* Control function for gost cipher */
983 int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
986 case EVP_CTRL_RAND_KEY:
988 ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
989 GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
993 case EVP_CTRL_KEY_MESH:
995 struct ossl_gost_cipher_ctx *c =
996 EVP_CIPHER_CTX_get_cipher_data(ctx);
1002 if (c->count != 0) {
1006 c->key_meshing = arg;
1010 GOSTerr(GOST_F_MAGMA_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
1016 static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1020 case EVP_CTRL_PROCESS_UNPROTECTED:
1022 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1023 STACK_OF(X509_ATTRIBUTE) *x = ptr;
1024 return gost2015_process_unprotected_attributes(x, arg, MAGMA_MAC_MAX_SIZE, c->tag);
1026 case EVP_CTRL_COPY: {
1027 EVP_CIPHER_CTX *out = ptr;
1028 struct ossl_gost_cipher_ctx *in_cctx = EVP_CIPHER_CTX_get_cipher_data(ctx);
1029 struct ossl_gost_cipher_ctx *out_cctx = EVP_CIPHER_CTX_get_cipher_data(out);
1031 if (in_cctx->omac_ctx == out_cctx->omac_ctx) {
1032 out_cctx->omac_ctx = EVP_MD_CTX_new();
1033 if (out_cctx->omac_ctx == NULL) {
1034 GOSTerr(GOST_F_MAGMA_CIPHER_CTL_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
1038 return EVP_MD_CTX_copy(out_cctx->omac_ctx, in_cctx->omac_ctx);
1041 return magma_cipher_ctl(ctx, type, arg, ptr);
1046 /* Set cipher parameters from ASN1 structure */
1047 int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1050 unsigned char *buf = NULL;
1051 unsigned char *p = NULL;
1052 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1053 GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
1054 ASN1_OCTET_STRING *os = NULL;
1056 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1059 if (!ASN1_OCTET_STRING_set
1060 (gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
1061 GOST_CIPHER_PARAMS_free(gcp);
1062 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1065 ASN1_OBJECT_free(gcp->enc_param_set);
1066 gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
1068 len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
1069 p = buf = OPENSSL_malloc(len);
1071 GOST_CIPHER_PARAMS_free(gcp);
1072 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1075 i2d_GOST_CIPHER_PARAMS(gcp, &p);
1076 GOST_CIPHER_PARAMS_free(gcp);
1078 os = ASN1_OCTET_STRING_new();
1080 if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
1082 GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
1087 ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
1091 /* Store parameters into ASN1 structure */
1092 int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1095 GOST_CIPHER_PARAMS *gcp = NULL;
1097 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1100 if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
1104 p = params->value.sequence->data;
1106 gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
1107 params->value.sequence->length);
1109 len = gcp->iv->length;
1110 if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
1111 GOST_CIPHER_PARAMS_free(gcp);
1112 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
1116 nid = OBJ_obj2nid(gcp->enc_param_set);
1117 if (nid == NID_undef) {
1118 GOST_CIPHER_PARAMS_free(gcp);
1119 GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
1120 GOST_R_INVALID_CIPHER_PARAM_OID);
1124 if (!gost_cipher_set_param(c, nid)) {
1125 GOST_CIPHER_PARAMS_free(gcp);
1128 /*XXX missing non-const accessor */
1129 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
1130 EVP_CIPHER_CTX_iv_length(ctx));
1132 GOST_CIPHER_PARAMS_free(gcp);
1137 #define MAGMA_UKM_LEN 12
1138 static int magma_set_asn1_parameters (EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1140 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1141 c->key_meshing = 8192;
1143 return gost2015_set_asn1_params(params, EVP_CIPHER_CTX_original_iv(ctx), 4,
1147 static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
1149 struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
1150 unsigned char iv[16];
1152 c->key_meshing = 8192;
1154 if (gost2015_get_asn1_params(params, MAGMA_UKM_LEN, iv, 4, c->kdf_seed) < 0)
1157 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, sizeof(iv));
1158 memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv, sizeof(iv));
1159 /* Key meshing 8 kb*/
1160 c->key_meshing = 8192;
1165 static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
1167 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1168 memset(c->buffer, 0, sizeof(c->buffer));
1169 memset(c->partial_block, 0, sizeof(c->partial_block));
1174 gost_init(&(c->cctx), block);
1178 static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
1180 return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
1183 static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
1185 return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
1188 static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
1189 const unsigned char *data)
1192 * We are using NULL for iv because CryptoPro doesn't interpret
1193 * internal state of MAC algorithm as iv during keymeshing (but does
1194 * initialize internal state from iv in key transport
1196 assert(c->count % 8 == 0 && c->count <= 1024);
1197 if (c->key_meshing && c->count == 1024) {
1198 cryptopro_key_meshing(&(c->cctx), NULL);
1200 mac_block(&(c->cctx), c->buffer, data);
1201 c->count = c->count % 1024 + 8;
1204 int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
1206 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1207 const unsigned char *p = data;
1208 size_t bytes = count;
1209 if (!(c->key_set)) {
1210 GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
1213 if (c->bytes_left) {
1215 for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
1216 c->partial_block[i] = *p;
1219 mac_block_mesh(c, c->partial_block);
1226 mac_block_mesh(c, p);
1231 memcpy(c->partial_block, p, bytes);
1233 c->bytes_left = bytes;
1237 int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
1239 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1241 GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
1244 if (c->count == 0 && c->bytes_left) {
1245 unsigned char buffer[8];
1246 memset(buffer, 0, 8);
1247 gost_imit_update(ctx, buffer, 8);
1249 if (c->bytes_left) {
1251 for (i = c->bytes_left; i < 8; i++) {
1252 c->partial_block[i] = 0;
1254 mac_block_mesh(c, c->partial_block);
1256 get_mac(c->buffer, 8 * c->dgst_size, md);
1260 int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
1263 case EVP_MD_CTRL_KEY_LEN:
1264 *((unsigned int *)(ptr)) = 32;
1266 case EVP_MD_CTRL_SET_KEY:
1268 struct ossl_gost_imit_ctx *gost_imit_ctx = EVP_MD_CTX_md_data(ctx);
1270 if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
1271 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
1274 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
1277 struct gost_mac_key *key = (struct gost_mac_key *)ptr;
1278 if (key->mac_param_nid != NID_undef) {
1279 const struct gost_cipher_info *param =
1280 get_encryption_params(OBJ_nid2obj(key->mac_param_nid));
1281 if (param == NULL) {
1282 GOSTerr(GOST_F_GOST_IMIT_CTRL,
1283 GOST_R_INVALID_MAC_PARAMS);
1286 gost_init(&(gost_imit_ctx->cctx), param->sblock);
1288 gost_key(&(gost_imit_ctx->cctx), key->key);
1289 gost_imit_ctx->key_set = 1;
1292 } else if (arg == 32) {
1293 gost_key(&(gost_imit_ctx->cctx), ptr);
1294 gost_imit_ctx->key_set = 1;
1297 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
1300 case EVP_MD_CTRL_XOF_LEN:
1302 struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
1303 if (arg < 1 || arg > 8) {
1304 GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
1316 int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
1318 if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
1319 memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
1320 sizeof(struct ossl_gost_imit_ctx));
1325 /* Clean up imit ctx */
1326 int gost_imit_cleanup(EVP_MD_CTX *ctx)
1328 memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));
1331 /* vim: set expandtab cinoptions=\:0,l1,t0,g0,(0 sw=4 : */