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gost_crypt.c
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/**********************************************************************
* gost_crypt.c *
* Copyright (c) 2005-2006 Cryptocom LTD *
* This file is distributed under the same license as OpenSSL *
* *
* OpenSSL interface to GOST 28147-89 cipher functions *
* Requires OpenSSL 0.9.9 for compilation *
**********************************************************************/
#include <string.h>
#include "gost89.h"
#include <openssl/err.h>
#include <openssl/rand.h>
#include "e_gost_err.h"
#include "gost_lcl.h"
#if !defined(CCGOST_DEBUG) && !defined(DEBUG)
# ifndef NDEBUG
# define NDEBUG
# endif
#endif
#include <assert.h>
static int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc);
static int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc);
static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc);
static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
const unsigned char *key,
const unsigned char *iv, int enc);
/* Handles block of data in CFB mode */
static int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl);
/* Handles block of data in CBC mode */
static int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl);
/* Handles block of data in CNT mode */
static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl);
/* Cleanup function */
static int gost_cipher_cleanup(EVP_CIPHER_CTX *);
/* set/get cipher parameters */
static int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
static int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
/* Control function */
static int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
static int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc);
/* Handles block of data in CBC mode */
static int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl);
static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl);
static EVP_CIPHER *_hidden_Gost28147_89_cipher = NULL;
const EVP_CIPHER *cipher_gost(void)
{
if (_hidden_Gost28147_89_cipher == NULL
&& ((_hidden_Gost28147_89_cipher =
EVP_CIPHER_meth_new(NID_id_Gost28147_89, 1 /* block_size */ ,
32 /* key_size */ )) == NULL
|| !EVP_CIPHER_meth_set_iv_length(_hidden_Gost28147_89_cipher, 8)
|| !EVP_CIPHER_meth_set_flags(_hidden_Gost28147_89_cipher,
EVP_CIPH_CFB_MODE |
EVP_CIPH_NO_PADDING |
EVP_CIPH_CUSTOM_IV |
EVP_CIPH_RAND_KEY |
EVP_CIPH_ALWAYS_CALL_INIT)
|| !EVP_CIPHER_meth_set_init(_hidden_Gost28147_89_cipher,
gost_cipher_init)
|| !EVP_CIPHER_meth_set_do_cipher(_hidden_Gost28147_89_cipher,
gost_cipher_do_cfb)
|| !EVP_CIPHER_meth_set_cleanup(_hidden_Gost28147_89_cipher,
gost_cipher_cleanup)
|| !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_Gost28147_89_cipher,
sizeof(struct
ossl_gost_cipher_ctx))
||
!EVP_CIPHER_meth_set_set_asn1_params(_hidden_Gost28147_89_cipher,
gost89_set_asn1_parameters)
||
!EVP_CIPHER_meth_set_get_asn1_params(_hidden_Gost28147_89_cipher,
gost89_get_asn1_parameters)
|| !EVP_CIPHER_meth_set_ctrl(_hidden_Gost28147_89_cipher,
gost_cipher_ctl))) {
EVP_CIPHER_meth_free(_hidden_Gost28147_89_cipher);
_hidden_Gost28147_89_cipher = NULL;
}
return _hidden_Gost28147_89_cipher;
}
static EVP_CIPHER *_hidden_Gost28147_89_cbc = NULL;
const EVP_CIPHER *cipher_gost_cbc(void)
{
if (_hidden_Gost28147_89_cbc == NULL
&& ((_hidden_Gost28147_89_cbc =
EVP_CIPHER_meth_new(NID_gost89_cbc, 8 /* block_size */ ,
32 /* key_size */ )) == NULL
|| !EVP_CIPHER_meth_set_iv_length(_hidden_Gost28147_89_cbc, 8)
|| !EVP_CIPHER_meth_set_flags(_hidden_Gost28147_89_cbc,
EVP_CIPH_CBC_MODE |
EVP_CIPH_CUSTOM_IV |
EVP_CIPH_RAND_KEY |
EVP_CIPH_ALWAYS_CALL_INIT)
|| !EVP_CIPHER_meth_set_init(_hidden_Gost28147_89_cbc,
gost_cipher_init_cbc)
|| !EVP_CIPHER_meth_set_do_cipher(_hidden_Gost28147_89_cbc,
gost_cipher_do_cbc)
|| !EVP_CIPHER_meth_set_cleanup(_hidden_Gost28147_89_cbc,
gost_cipher_cleanup)
|| !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_Gost28147_89_cbc,
sizeof(struct
ossl_gost_cipher_ctx))
|| !EVP_CIPHER_meth_set_set_asn1_params(_hidden_Gost28147_89_cbc,
gost89_set_asn1_parameters)
|| !EVP_CIPHER_meth_set_get_asn1_params(_hidden_Gost28147_89_cbc,
gost89_get_asn1_parameters)
|| !EVP_CIPHER_meth_set_ctrl(_hidden_Gost28147_89_cbc,
gost_cipher_ctl))) {
EVP_CIPHER_meth_free(_hidden_Gost28147_89_cbc);
_hidden_Gost28147_89_cbc = NULL;
}
return _hidden_Gost28147_89_cbc;
}
static EVP_CIPHER *_hidden_gost89_cnt = NULL;
const EVP_CIPHER *cipher_gost_cpacnt(void)
{
if (_hidden_gost89_cnt == NULL
&& ((_hidden_gost89_cnt =
EVP_CIPHER_meth_new(NID_gost89_cnt, 1 /* block_size */ ,
32 /* key_size */ )) == NULL
|| !EVP_CIPHER_meth_set_iv_length(_hidden_gost89_cnt, 8)
|| !EVP_CIPHER_meth_set_flags(_hidden_gost89_cnt,
EVP_CIPH_OFB_MODE |
EVP_CIPH_NO_PADDING |
EVP_CIPH_CUSTOM_IV |
EVP_CIPH_RAND_KEY |
EVP_CIPH_ALWAYS_CALL_INIT)
|| !EVP_CIPHER_meth_set_init(_hidden_gost89_cnt,
gost_cipher_init_cpa)
|| !EVP_CIPHER_meth_set_do_cipher(_hidden_gost89_cnt,
gost_cipher_do_cnt)
|| !EVP_CIPHER_meth_set_cleanup(_hidden_gost89_cnt,
gost_cipher_cleanup)
|| !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_gost89_cnt,
sizeof(struct
ossl_gost_cipher_ctx))
|| !EVP_CIPHER_meth_set_set_asn1_params(_hidden_gost89_cnt,
gost89_set_asn1_parameters)
|| !EVP_CIPHER_meth_set_get_asn1_params(_hidden_gost89_cnt,
gost89_get_asn1_parameters)
|| !EVP_CIPHER_meth_set_ctrl(_hidden_gost89_cnt,
gost_cipher_ctl))) {
EVP_CIPHER_meth_free(_hidden_gost89_cnt);
_hidden_gost89_cnt = NULL;
}
return _hidden_gost89_cnt;
}
static EVP_CIPHER *_hidden_gost89_cnt_12 = NULL;
const EVP_CIPHER *cipher_gost_cpcnt_12(void)
{
if (_hidden_gost89_cnt_12 == NULL
&& ((_hidden_gost89_cnt_12 =
EVP_CIPHER_meth_new(NID_gost89_cnt_12, 1 /* block_size */ ,
32 /* key_size */ )) == NULL
|| !EVP_CIPHER_meth_set_iv_length(_hidden_gost89_cnt_12, 8)
|| !EVP_CIPHER_meth_set_flags(_hidden_gost89_cnt_12,
EVP_CIPH_OFB_MODE |
EVP_CIPH_NO_PADDING |
EVP_CIPH_CUSTOM_IV |
EVP_CIPH_RAND_KEY |
EVP_CIPH_ALWAYS_CALL_INIT)
|| !EVP_CIPHER_meth_set_init(_hidden_gost89_cnt_12,
gost_cipher_init_cp_12)
|| !EVP_CIPHER_meth_set_do_cipher(_hidden_gost89_cnt_12,
gost_cipher_do_cnt)
|| !EVP_CIPHER_meth_set_cleanup(_hidden_gost89_cnt_12,
gost_cipher_cleanup)
|| !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_gost89_cnt_12,
sizeof(struct
ossl_gost_cipher_ctx))
|| !EVP_CIPHER_meth_set_set_asn1_params(_hidden_gost89_cnt_12,
gost89_set_asn1_parameters)
|| !EVP_CIPHER_meth_set_get_asn1_params(_hidden_gost89_cnt_12,
gost89_get_asn1_parameters)
|| !EVP_CIPHER_meth_set_ctrl(_hidden_gost89_cnt_12,
gost_cipher_ctl))) {
EVP_CIPHER_meth_free(_hidden_gost89_cnt_12);
_hidden_gost89_cnt_12 = NULL;
}
return _hidden_gost89_cnt_12;
}
static EVP_CIPHER *_hidden_magma_ctr = NULL;
const EVP_CIPHER *cipher_magma_ctr(void)
{
if (_hidden_magma_ctr == NULL
&& ((_hidden_magma_ctr =
EVP_CIPHER_meth_new(NID_magma_ctr, 1 /* block_size */ ,
32 /* key_size */ )) == NULL
|| !EVP_CIPHER_meth_set_iv_length(_hidden_magma_ctr, 8)
|| !EVP_CIPHER_meth_set_flags(_hidden_magma_ctr,
EVP_CIPH_CTR_MODE |
EVP_CIPH_NO_PADDING |
EVP_CIPH_CUSTOM_IV |
EVP_CIPH_RAND_KEY |
EVP_CIPH_ALWAYS_CALL_INIT)
|| !EVP_CIPHER_meth_set_init(_hidden_magma_ctr,
magma_cipher_init)
|| !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_ctr,
magma_cipher_do_ctr)
|| !EVP_CIPHER_meth_set_cleanup(_hidden_magma_ctr,
gost_cipher_cleanup)
|| !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_ctr,
sizeof(struct
ossl_gost_cipher_ctx))
|| !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_ctr,
gost89_set_asn1_parameters)
|| !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_ctr,
gost89_get_asn1_parameters)
|| !EVP_CIPHER_meth_set_ctrl(_hidden_magma_ctr,
gost_cipher_ctl))) {
EVP_CIPHER_meth_free(_hidden_magma_ctr);
_hidden_magma_ctr = NULL;
}
return _hidden_magma_ctr;
}
static EVP_CIPHER *_hidden_magma_cbc = NULL;
const EVP_CIPHER *cipher_magma_cbc(void)
{
if (_hidden_magma_cbc == NULL
&& ((_hidden_magma_cbc =
EVP_CIPHER_meth_new(NID_magma_cbc, 8 /* block_size */ ,
32 /* key_size */ )) == NULL
|| !EVP_CIPHER_meth_set_iv_length(_hidden_magma_cbc, 8)
|| !EVP_CIPHER_meth_set_flags(_hidden_magma_cbc,
EVP_CIPH_CBC_MODE |
EVP_CIPH_CUSTOM_IV |
EVP_CIPH_RAND_KEY |
EVP_CIPH_ALWAYS_CALL_INIT)
|| !EVP_CIPHER_meth_set_init(_hidden_magma_cbc,
magma_cipher_init)
|| !EVP_CIPHER_meth_set_do_cipher(_hidden_magma_cbc,
magma_cipher_do_cbc)
|| !EVP_CIPHER_meth_set_cleanup(_hidden_magma_cbc,
gost_cipher_cleanup)
|| !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_magma_cbc,
sizeof(struct
ossl_gost_cipher_ctx))
|| !EVP_CIPHER_meth_set_set_asn1_params(_hidden_magma_cbc,
gost89_set_asn1_parameters)
|| !EVP_CIPHER_meth_set_get_asn1_params(_hidden_magma_cbc,
gost89_get_asn1_parameters)
|| !EVP_CIPHER_meth_set_ctrl(_hidden_magma_cbc,
gost_cipher_ctl))) {
EVP_CIPHER_meth_free(_hidden_magma_cbc);
_hidden_magma_cbc = NULL;
}
return _hidden_magma_cbc;
}
void cipher_gost_destroy(void)
{
EVP_CIPHER_meth_free(_hidden_Gost28147_89_cipher);
_hidden_Gost28147_89_cipher = NULL;
EVP_CIPHER_meth_free(_hidden_gost89_cnt);
_hidden_gost89_cnt = NULL;
EVP_CIPHER_meth_free(_hidden_Gost28147_89_cbc);
_hidden_Gost28147_89_cbc = NULL;
EVP_CIPHER_meth_free(_hidden_gost89_cnt_12);
_hidden_gost89_cnt_12 = NULL;
EVP_CIPHER_meth_free(_hidden_magma_cbc);
_hidden_magma_cbc = NULL;
EVP_CIPHER_meth_free(_hidden_magma_ctr);
_hidden_magma_ctr = NULL;
}
/* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */
/* Init functions which set specific parameters */
static int gost_imit_init_cpa(EVP_MD_CTX *ctx);
static int gost_imit_init_cp_12(EVP_MD_CTX *ctx);
/* process block of data */
static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count);
/* Return computed value */
static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md);
/* Copies context */
static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
static int gost_imit_cleanup(EVP_MD_CTX *ctx);
/* Control function, knows how to set MAC key.*/
static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr);
static EVP_MD *_hidden_Gost28147_89_MAC_md = NULL;
static EVP_MD *_hidden_Gost28147_89_12_MAC_md = NULL;
EVP_MD *imit_gost_cpa(void)
{
if (_hidden_Gost28147_89_MAC_md == NULL) {
EVP_MD *md;
if ((md = EVP_MD_meth_new(NID_id_Gost28147_89_MAC, NID_undef)) == NULL
|| !EVP_MD_meth_set_result_size(md, 4)
|| !EVP_MD_meth_set_input_blocksize(md, 8)
|| !EVP_MD_meth_set_app_datasize(md,
sizeof(struct
ossl_gost_imit_ctx))
|| !EVP_MD_meth_set_flags(md, 0)
|| !EVP_MD_meth_set_init(md, gost_imit_init_cpa)
|| !EVP_MD_meth_set_update(md, gost_imit_update)
|| !EVP_MD_meth_set_final(md, gost_imit_final)
|| !EVP_MD_meth_set_copy(md, gost_imit_copy)
|| !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
|| !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
EVP_MD_meth_free(md);
md = NULL;
}
_hidden_Gost28147_89_MAC_md = md;
}
return _hidden_Gost28147_89_MAC_md;
}
void imit_gost_cpa_destroy(void)
{
EVP_MD_meth_free(_hidden_Gost28147_89_MAC_md);
_hidden_Gost28147_89_MAC_md = NULL;
}
EVP_MD *imit_gost_cp_12(void)
{
if (_hidden_Gost28147_89_12_MAC_md == NULL) {
EVP_MD *md;
if ((md = EVP_MD_meth_new(NID_gost_mac_12, NID_undef)) == NULL
|| !EVP_MD_meth_set_result_size(md, 4)
|| !EVP_MD_meth_set_input_blocksize(md, 8)
|| !EVP_MD_meth_set_app_datasize(md,
sizeof(struct
ossl_gost_imit_ctx))
|| !EVP_MD_meth_set_flags(md, 0)
|| !EVP_MD_meth_set_init(md, gost_imit_init_cp_12)
|| !EVP_MD_meth_set_update(md, gost_imit_update)
|| !EVP_MD_meth_set_final(md, gost_imit_final)
|| !EVP_MD_meth_set_copy(md, gost_imit_copy)
|| !EVP_MD_meth_set_cleanup(md, gost_imit_cleanup)
|| !EVP_MD_meth_set_ctrl(md, gost_imit_ctrl)) {
EVP_MD_meth_free(md);
md = NULL;
}
_hidden_Gost28147_89_12_MAC_md = md;
}
return _hidden_Gost28147_89_12_MAC_md;
}
void imit_gost_cp_12_destroy(void)
{
EVP_MD_meth_free(_hidden_Gost28147_89_12_MAC_md);
_hidden_Gost28147_89_12_MAC_md = NULL;
}
/*
* Correspondence between gost parameter OIDs and substitution blocks
* NID field is filed by register_gost_NID function in engine.c
* upon engine initialization
*/
struct gost_cipher_info gost_cipher_list[] = {
/*- NID *//*
* Subst block
*//*
* Key meshing
*/
/*
* {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
*/
{NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
1},
{NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
1},
{NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
1},
{NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
1},
{NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
{NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
{NID_undef, NULL, 0}
};
/*
* get encryption parameters from crypto network settings FIXME For now we
* use environment var CRYPT_PARAMS as place to store these settings.
* Actually, it is better to use engine control command, read from
* configuration file to set them
*/
const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
{
int nid;
struct gost_cipher_info *param;
if (!obj) {
const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
if (!params || !strlen(params)) {
int i;
for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
return &gost_cipher_list[i];
return &gost_cipher_list[0];
}
nid = OBJ_txt2nid(params);
if (nid == NID_undef) {
GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
GOST_R_INVALID_CIPHER_PARAM_OID);
return NULL;
}
} else {
nid = OBJ_obj2nid(obj);
}
for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
param++) ;
if (!param->sblock) {
GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
return NULL;
}
return param;
}
/* Sets cipher param from paramset NID. */
static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
{
const struct gost_cipher_info *param;
param =
get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
if (!param)
return 0;
c->paramNID = param->nid;
c->key_meshing = param->key_meshing;
c->count = 0;
gost_init(&(c->cctx), param->sblock);
return 1;
}
/* Initializes EVP_CIPHER_CTX by paramset NID */
static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
const unsigned char *key,
const unsigned char *iv, int enc,
int paramNID, int mode)
{
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
if (!gost_cipher_set_param(c, paramNID))
return 0;
EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
}
if (key)
gost_key(&(c->cctx), key);
if (iv) {
memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
EVP_CIPHER_CTX_iv_length(ctx));
}
memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
return 1;
}
static int magma_cipher_init_param(EVP_CIPHER_CTX *ctx,
const unsigned char *key,
const unsigned char *iv, int enc,
int paramNID, int mode)
{
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
return 0;
EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
}
if (key)
magma_key(&(c->cctx), key);
if (iv) {
memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
EVP_CIPHER_CTX_iv_length(ctx));
}
memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
return 1;
}
static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
const unsigned char *key,
const unsigned char *iv,
gost_subst_block * block)
{
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
gost_init(&(c->cctx), block);
c->key_meshing = 1;
c->count = 0;
if (key)
gost_key(&(c->cctx), key);
if (iv) {
memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
EVP_CIPHER_CTX_iv_length(ctx));
}
memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
return 1;
}
static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc)
{
return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
}
static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
const unsigned char *key,
const unsigned char *iv, int enc)
{
return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
}
/* Initializes EVP_CIPHER_CTX with default values */
int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc)
{
return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
EVP_CIPH_CFB_MODE);
}
/* Initializes EVP_CIPHER_CTX with default values */
int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc)
{
return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
EVP_CIPH_CBC_MODE);
}
/* Initializes EVP_CIPHER_CTX with default values */
int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc)
{
return magma_cipher_init_param(ctx, key, iv, enc, NID_undef,
EVP_CIPH_CBC_MODE);
}
/*
* Wrapper around gostcrypt function from gost89.c which perform key meshing
* when nesseccary
*/
static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
{
struct ossl_gost_cipher_ctx *c = ctx;
assert(c->count % 8 == 0 && c->count <= 1024);
if (c->key_meshing && c->count == 1024) {
cryptopro_key_meshing(&(c->cctx), iv);
}
gostcrypt(&(c->cctx), iv, buf);
c->count = c->count % 1024 + 8;
}
static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
{
struct ossl_gost_cipher_ctx *c = ctx;
word32 g, go;
unsigned char buf1[8];
assert(c->count % 8 == 0 && c->count <= 1024);
if (c->key_meshing && c->count == 1024) {
cryptopro_key_meshing(&(c->cctx), iv);
}
if (c->count == 0) {
gostcrypt(&(c->cctx), iv, buf1);
} else {
memcpy(buf1, iv, 8);
}
g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
g += 0x01010101;
buf1[0] = (unsigned char)(g & 0xff);
buf1[1] = (unsigned char)((g >> 8) & 0xff);
buf1[2] = (unsigned char)((g >> 16) & 0xff);
buf1[3] = (unsigned char)((g >> 24) & 0xff);
g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
go = g;
g += 0x01010104;
if (go > g) /* overflow */
g++;
buf1[4] = (unsigned char)(g & 0xff);
buf1[5] = (unsigned char)((g >> 8) & 0xff);
buf1[6] = (unsigned char)((g >> 16) & 0xff);
buf1[7] = (unsigned char)((g >> 24) & 0xff);
memcpy(iv, buf1, 8);
gostcrypt(&(c->cctx), buf1, buf);
c->count = c->count % 1024 + 8;
}
/* GOST encryption in CBC mode */
int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
unsigned char b[8];
const unsigned char *in_ptr = in;
unsigned char *out_ptr = out;
int i;
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
if (EVP_CIPHER_CTX_encrypting(ctx)) {
while (inl > 0) {
for (i = 0; i < 8; i++) {
b[i] = iv[i] ^ in_ptr[i];
}
gostcrypt(&(c->cctx), b, out_ptr);
memcpy(iv, out_ptr, 8);
out_ptr += 8;
in_ptr += 8;
inl -= 8;
}
} else {
while (inl > 0) {
gostdecrypt(&(c->cctx), in_ptr, b);
for (i = 0; i < 8; i++) {
out_ptr[i] = iv[i] ^ b[i];
}
memcpy(iv, in_ptr, 8);
out_ptr += 8;
in_ptr += 8;
inl -= 8;
}
}
return 1;
}
/* MAGMA encryption in CBC mode */
int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
unsigned char b[8];
unsigned char d[8];
const unsigned char *in_ptr = in;
unsigned char *out_ptr = out;
int i;
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
if (EVP_CIPHER_CTX_encrypting(ctx)) {
while (inl > 0) {
for (i = 0; i < 8; i++) {
b[7-i] = iv[i] ^ in_ptr[i];
}
gostcrypt(&(c->cctx), b, d);
for (i = 0; i < 8; i++) {
out_ptr[7-i] = d[i];
}
memcpy(iv, out_ptr, 8);
out_ptr += 8;
in_ptr += 8;
inl -= 8;
}
} else {
while (inl > 0) {
for (i = 0; i < 8; i++) {
d[7-i] = in_ptr[i];
}
gostdecrypt(&(c->cctx), d, b);
for (i = 0; i < 8; i++) {
out_ptr[i] = iv[i] ^ b[7-i];
}
memcpy(iv, in_ptr, 8);
out_ptr += 8;
in_ptr += 8;
inl -= 8;
}
}
return 1;
}
/* increment counter (64-bit int) by 1 */
static void ctr64_inc(unsigned char *counter)
{
inc_counter(counter, 8);
}
/* MAGMA encryption in CTR mode */
static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
const unsigned char *in_ptr = in;
unsigned char *out_ptr = out;
size_t i = 0;
size_t j;
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
unsigned char b[8];
/* Process partial blocks */
if (EVP_CIPHER_CTX_num(ctx)) {
for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
j++, i++, in_ptr++, out_ptr++) {
*out_ptr = buf[7-j] ^ (*in_ptr);
}
if (j == 8) {
EVP_CIPHER_CTX_set_num(ctx, 0);
} else {
EVP_CIPHER_CTX_set_num(ctx, j);
return 1;
}
}
/* Process full blocks */
for (; i + 8 <= inl; i += 8, in_ptr += 8, out_ptr += 8) {
for (j = 0; j < 8; j++) {
b[7-j] = iv[j];
}
gostcrypt(&(c->cctx), b, buf);
for (j = 0; j < 8; j++) {
out_ptr[j] = buf[7-j] ^ in_ptr[j];
}
ctr64_inc(iv);
}
/* Process the rest of plaintext */
if (i < inl) {
for (j = 0; j < 8; j++) {
b[7-j] = iv[j];
}
gostcrypt(&(c->cctx), iv, buf);
ctr64_inc(iv);
for (j = 0; i < inl; j++, i++) {
out_ptr[j] = buf[7-j] ^ in_ptr[j];
}
EVP_CIPHER_CTX_set_num(ctx, j);
} else {
EVP_CIPHER_CTX_set_num(ctx, 0);
}
return 1;
}
/* GOST encryption in CFB mode */
int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
const unsigned char *in_ptr = in;
unsigned char *out_ptr = out;
size_t i = 0;
size_t j = 0;
unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
/* process partial block if any */
if (EVP_CIPHER_CTX_num(ctx)) {
for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
j++, i++, in_ptr++, out_ptr++) {
if (!EVP_CIPHER_CTX_encrypting(ctx))
buf[j + 8] = *in_ptr;
*out_ptr = buf[j] ^ (*in_ptr);
if (EVP_CIPHER_CTX_encrypting(ctx))
buf[j + 8] = *out_ptr;
}
if (j == 8) {
memcpy(iv, buf + 8, 8);
EVP_CIPHER_CTX_set_num(ctx, 0);
} else {
EVP_CIPHER_CTX_set_num(ctx, j);
return 1;
}
}
for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
/*
* block cipher current iv
*/
gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
/*
* xor next block of input text with it and output it
*/
/*
* output this block
*/
if (!EVP_CIPHER_CTX_encrypting(ctx))
memcpy(iv, in_ptr, 8);
for (j = 0; j < 8; j++) {
out_ptr[j] = buf[j] ^ in_ptr[j];
}
/* Encrypt */
/* Next iv is next block of cipher text */
if (EVP_CIPHER_CTX_encrypting(ctx))
memcpy(iv, out_ptr, 8);
}
/* Process rest of buffer */
if (i < inl) {
gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
if (!EVP_CIPHER_CTX_encrypting(ctx))
memcpy(buf + 8, in_ptr, inl - i);
for (j = 0; i < inl; j++, i++) {
out_ptr[j] = buf[j] ^ in_ptr[j];
}
EVP_CIPHER_CTX_set_num(ctx, j);
if (EVP_CIPHER_CTX_encrypting(ctx))
memcpy(buf + 8, out_ptr, j);
} else {
EVP_CIPHER_CTX_set_num(ctx, 0);
}
return 1;
}
static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
const unsigned char *in_ptr = in;
unsigned char *out_ptr = out;
size_t i = 0;
size_t j;
unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
/* process partial block if any */
if (EVP_CIPHER_CTX_num(ctx)) {
for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
j++, i++, in_ptr++, out_ptr++) {
*out_ptr = buf[j] ^ (*in_ptr);
}
if (j == 8) {
EVP_CIPHER_CTX_set_num(ctx, 0);
} else {
EVP_CIPHER_CTX_set_num(ctx, j);
return 1;
}
}
for (; i + 8 < inl; i += 8, in_ptr += 8, out_ptr += 8) {
/*
* block cipher current iv
*/
/* Encrypt */
gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
/*
* xor next block of input text with it and output it
*/
/*
* output this block
*/
for (j = 0; j < 8; j++) {
out_ptr[j] = buf[j] ^ in_ptr[j];
}
}
/* Process rest of buffer */
if (i < inl) {
gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
for (j = 0; i < inl; j++, i++) {
out_ptr[j] = buf[j] ^ in_ptr[j];
}
EVP_CIPHER_CTX_set_num(ctx, j);
} else {
EVP_CIPHER_CTX_set_num(ctx, 0);
}
return 1;
}
/* Cleaning up of EVP_CIPHER_CTX */
int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
{
gost_destroy(&
((struct ossl_gost_cipher_ctx *)
EVP_CIPHER_CTX_get_cipher_data(ctx))->cctx);
EVP_CIPHER_CTX_set_app_data(ctx, NULL);
return 1;
}
/* Control function for gost cipher */
int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
{
switch (type) {
#if 0
case EVP_CTRL_INIT:
{
struct ossl_gost_cipher_ctx *c =
EVP_CIPHER_CTX_get_cipher_data(ctx);
if (c == NULL) {
return -1;
}
return gost_cipher_set_param(c, arg);
}
#endif
case EVP_CTRL_RAND_KEY:
{
if (RAND_bytes
((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
return -1;
}
break;
}
case EVP_CTRL_PBE_PRF_NID:
if (ptr) {
const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
int nid = NID_id_tc26_hmac_gost_3411_2012_512;
if (params) {
if (!strcmp("md_gost12_256", params))
nid = NID_id_tc26_hmac_gost_3411_2012_256;
else if (!strcmp("md_gost12_512", params))
nid = NID_id_tc26_hmac_gost_3411_2012_512;
else if (!strcmp("md_gost94", params))
nid = NID_id_HMACGostR3411_94;
}
*((int *)ptr) = nid;
return 1;
} else {
return 0;
}
case EVP_CTRL_SET_SBOX:
if (ptr) {
struct ossl_gost_cipher_ctx *c =
EVP_CIPHER_CTX_get_cipher_data(ctx);
int nid;
int cur_meshing;
int ret;
if (c == NULL) {
return -1;
}
if (c->count != 0) {
return -1;
}
nid = OBJ_txt2nid(ptr);
if (nid == NID_undef) {
return 0;
}
cur_meshing = c->key_meshing;
ret = gost_cipher_set_param(c, nid);
c->key_meshing = cur_meshing;
return ret;
} else {
return 0;
}
case EVP_CTRL_KEY_MESH:
{
struct ossl_gost_cipher_ctx *c =
EVP_CIPHER_CTX_get_cipher_data(ctx);
if (c == NULL) {
return -1;
}
if (c->count != 0) {
return -1;
}
c->key_meshing = arg;
return 1;
}
default:
GOSTerr(GOST_F_GOST_CIPHER_CTL,
GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
return -1;
}
return 1;
}
/* Set cipher parameters from ASN1 structure */
int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
{
int len = 0;
unsigned char *buf = NULL;
unsigned char *p = NULL;
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
ASN1_OCTET_STRING *os = NULL;
if (!gcp) {
GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
return 0;
}
if (!ASN1_OCTET_STRING_set
(gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
GOST_CIPHER_PARAMS_free(gcp);
GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
return 0;
}
ASN1_OBJECT_free(gcp->enc_param_set);
gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
p = buf = OPENSSL_malloc(len);
if (!buf) {
GOST_CIPHER_PARAMS_free(gcp);
GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
return 0;
}
i2d_GOST_CIPHER_PARAMS(gcp, &p);
GOST_CIPHER_PARAMS_free(gcp);
os = ASN1_OCTET_STRING_new();
if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {