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/**********************************************************************
* gost_eng.c *
* Main file of GOST engine *
* *
* Copyright (c) 2005-2006 Cryptocom LTD *
* Copyright (c) 2020 Chikunov Vitaly <vt@altlinux.org> *
* *
* This file is distributed under the same license as OpenSSL *
* *
**********************************************************************/
#include <string.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/engine.h>
#include <openssl/obj_mac.h>
#include "e_gost_err.h"
#include "gost_lcl.h"
#include "gost_grasshopper_cipher.h"
static const char* engine_gost_id = "gost";
static const char* engine_gost_name =
"Reference implementation of GOST engine";
/* Symmetric cipher and digest function registrar */
static int gost_ciphers(ENGINE* e, const EVP_CIPHER** cipher,
const int** nids, int nid);
static int gost_digests(ENGINE* e, const EVP_MD** digest,
const int** nids, int nid);
static int gost_pkey_meths(ENGINE* e, EVP_PKEY_METHOD** pmeth,
const int** nids, int nid);
static int gost_pkey_asn1_meths(ENGINE* e, EVP_PKEY_ASN1_METHOD** ameth,
const int** nids, int nid);
static EVP_PKEY_METHOD* pmeth_GostR3410_2001 = NULL,
* pmeth_GostR3410_2012_256 = NULL,
* pmeth_GostR3410_2012_512 = NULL,
* pmeth_Gost28147_MAC = NULL, * pmeth_Gost28147_MAC_12 = NULL,
* pmeth_magma_mac = NULL, * pmeth_grasshopper_mac = NULL,
* pmeth_magma_mac_acpkm = NULL, * pmeth_grasshopper_mac_acpkm = NULL;
static EVP_PKEY_ASN1_METHOD* ameth_GostR3410_2001 = NULL,
* ameth_GostR3410_2012_256 = NULL,
* ameth_GostR3410_2012_512 = NULL,
* ameth_Gost28147_MAC = NULL, * ameth_Gost28147_MAC_12 = NULL,
* ameth_magma_mac = NULL, * ameth_grasshopper_mac = NULL,
* ameth_magma_mac_acpkm = NULL, * ameth_grasshopper_mac_acpkm = NULL;
static struct gost_digest_minfo {
int nid;
EVP_MD *(*digest)(void);
void (*destroy)(void);
const char *sn;
const char *alias;
} gost_digest_array[] = {
{
NID_id_GostR3411_94,
digest_gost,
digest_gost_destroy,
},
{
NID_id_Gost28147_89_MAC,
imit_gost_cpa,
imit_gost_cpa_destroy,
},
{
NID_id_GostR3411_2012_256,
digest_gost2012_256,
digest_gost2012_256_destroy,
SN_id_GostR3411_2012_256,
"streebog256",
},
{
NID_id_GostR3411_2012_512,
digest_gost2012_512,
digest_gost2012_512_destroy,
SN_id_GostR3411_2012_512,
"streebog512",
},
{
NID_gost_mac_12,
imit_gost_cp_12,
imit_gost_cp_12_destroy,
},
{
NID_magma_mac,
magma_omac,
magma_omac_destroy,
},
{
NID_grasshopper_mac,
grasshopper_omac,
grasshopper_omac_destroy,
},
{
NID_id_tc26_cipher_gostr3412_2015_kuznyechik_ctracpkm_omac,
grasshopper_omac_acpkm,
grasshopper_omac_acpkm_destroy,
},
{ 0 },
};
static struct gost_cipher_minfo {
int nid;
const EVP_CIPHER *(*cipher)(void);
} gost_cipher_array[] = {
{
NID_id_Gost28147_89,
cipher_gost,
},
{
NID_gost89_cnt,
cipher_gost_cpacnt,
},
{
NID_gost89_cnt_12,
cipher_gost_cpcnt_12,
},
{
NID_gost89_cbc,
cipher_gost_cbc,
},
{
NID_grasshopper_ecb,
cipher_gost_grasshopper_ecb,
},
{
NID_grasshopper_cbc,
cipher_gost_grasshopper_cbc,
},
{
NID_grasshopper_cfb,
cipher_gost_grasshopper_cfb,
},
{
NID_grasshopper_ofb,
cipher_gost_grasshopper_ofb,
},
{
NID_grasshopper_ctr,
cipher_gost_grasshopper_ctr,
},
{
NID_magma_cbc,
cipher_magma_cbc,
},
{
NID_magma_ctr,
cipher_magma_ctr,
},
{
NID_id_tc26_cipher_gostr3412_2015_kuznyechik_ctracpkm,
cipher_gost_grasshopper_ctracpkm,
},
{
NID_kuznyechik_ctr_acpkm_omac,
cipher_gost_grasshopper_ctracpkm_omac,
},
{
NID_magma_kexp15,
cipher_magma_wrap,
},
{
NID_kuznyechik_kexp15,
cipher_kuznyechik_wrap,
},
{ 0 },
};
static struct gost_meth_minfo {
int nid;
EVP_PKEY_METHOD **pmeth;
EVP_PKEY_ASN1_METHOD **ameth;
const char *pemstr;
const char *info;
} gost_meth_array[] = {
{
NID_id_GostR3410_2001,
&pmeth_GostR3410_2001,
&ameth_GostR3410_2001,
"GOST2001",
"GOST R 34.10-2001",
},
{
NID_id_Gost28147_89_MAC,
&pmeth_Gost28147_MAC,
&ameth_Gost28147_MAC,
"GOST-MAC",
"GOST 28147-89 MAC",
},
{
NID_id_GostR3410_2012_256,
&pmeth_GostR3410_2012_256,
&ameth_GostR3410_2012_256,
"GOST2012_256",
"GOST R 34.10-2012 with 256 bit key",
},
{
NID_id_GostR3410_2012_512,
&pmeth_GostR3410_2012_512,
&ameth_GostR3410_2012_512,
"GOST2012_512",
"GOST R 34.10-2012 with 512 bit key",
},
{
NID_gost_mac_12,
&pmeth_Gost28147_MAC_12,
&ameth_Gost28147_MAC_12,
"GOST-MAC-12",
"GOST 28147-89 MAC with 2012 params",
},
{
NID_magma_mac,
&pmeth_magma_mac,
&ameth_magma_mac,
"MAGMA-MAC",
"GOST R 34.13-2015 Magma MAC",
},
{
NID_grasshopper_mac,
&pmeth_grasshopper_mac,
&ameth_grasshopper_mac,
"GRASSHOPPER-MAC",
"GOST R 34.13-2015 Grasshopper MAC",
},
{
NID_id_tc26_cipher_gostr3412_2015_magma_ctracpkm_omac,
&pmeth_magma_mac_acpkm,
&ameth_magma_mac_acpkm,
"ID-TC26-CIPHER-GOSTR3412-2015-MAGMA-CTRACPKM-OMAC",
"GOST R 34.13-2015 Magma MAC ACPKM",
},
{
NID_id_tc26_cipher_gostr3412_2015_kuznyechik_ctracpkm_omac,
&pmeth_grasshopper_mac_acpkm,
&ameth_grasshopper_mac_acpkm,
"ID-TC26-CIPHER-GOSTR3412-2015-KUZNYECHIK-CTRACPKM-OMAC",
"GOST R 34.13-2015 Grasshopper MAC ACPKM",
},
{ 0 },
};
#ifndef OSSL_NELEM
# define OSSL_NELEM(x) (sizeof(x)/sizeof((x)[0]))
#endif
/* `- 1' because of terminating zero element */
static int known_digest_nids[OSSL_NELEM(gost_digest_array) - 1];
static int known_cipher_nids[OSSL_NELEM(gost_cipher_array) - 1];
static int known_meths_nids[OSSL_NELEM(gost_meth_array) - 1];
static int gost_engine_init(ENGINE* e) {
return 1;
}
static int gost_engine_finish(ENGINE* e) {
return 1;
}
static int gost_engine_destroy(ENGINE* e) {
struct gost_digest_minfo *dinfo = gost_digest_array;
for (; dinfo->nid; dinfo++) {
if (dinfo->alias)
EVP_delete_digest_alias(dinfo->alias);
dinfo->destroy();
}
cipher_gost_destroy();
cipher_gost_grasshopper_destroy();
wrap_ciphers_destroy();
gost_param_free();
struct gost_meth_minfo *minfo = gost_meth_array;
for (; minfo->nid; minfo++) {
*minfo->pmeth = NULL;
*minfo->ameth = NULL;
}
ERR_unload_GOST_strings();
return 1;
}
static int bind_gost(ENGINE* e, const char* id) {
int ret = 0;
if (id != NULL && strcmp(id, engine_gost_id) != 0)
return 0;
if (ameth_GostR3410_2001) {
printf("GOST engine already loaded\n");
goto end;
}
if (!ENGINE_set_id(e, engine_gost_id)) {
printf("ENGINE_set_id failed\n");
goto end;
}
if (!ENGINE_set_name(e, engine_gost_name)) {
printf("ENGINE_set_name failed\n");
goto end;
}
if (!ENGINE_set_digests(e, gost_digests)) {
printf("ENGINE_set_digests failed\n");
goto end;
}
if (!ENGINE_set_ciphers(e, gost_ciphers)) {
printf("ENGINE_set_ciphers failed\n");
goto end;
}
if (!ENGINE_set_pkey_meths(e, gost_pkey_meths)) {
printf("ENGINE_set_pkey_meths failed\n");
goto end;
}
if (!ENGINE_set_pkey_asn1_meths(e, gost_pkey_asn1_meths)) {
printf("ENGINE_set_pkey_asn1_meths failed\n");
goto end;
}
/* Control function and commands */
if (!ENGINE_set_cmd_defns(e, gost_cmds)) {
fprintf(stderr, "ENGINE_set_cmd_defns failed\n");
goto end;
}
if (!ENGINE_set_ctrl_function(e, gost_control_func)) {
fprintf(stderr, "ENGINE_set_ctrl_func failed\n");
goto end;
}
if (!ENGINE_set_destroy_function(e, gost_engine_destroy)
|| !ENGINE_set_init_function(e, gost_engine_init)
|| !ENGINE_set_finish_function(e, gost_engine_finish)) {
goto end;
}
struct gost_meth_minfo *minfo = gost_meth_array;
for (; minfo->nid; minfo++) {
/* This skip looks temporary. */
if (minfo->nid == NID_id_tc26_cipher_gostr3412_2015_magma_ctracpkm_omac)
continue;
if (!register_ameth_gost(minfo->nid, minfo->ameth, minfo->pemstr,
minfo->info))
goto end;
if (!register_pmeth_gost(minfo->nid, minfo->pmeth, 0))
goto end;
}
if (!ENGINE_register_ciphers(e)
|| !ENGINE_register_digests(e)
|| !ENGINE_register_pkey_meths(e))
goto end;
struct gost_cipher_minfo *cinfo = gost_cipher_array;
for (; cinfo->nid; cinfo++)
if (!EVP_add_cipher(cinfo->cipher()))
goto end;
struct gost_digest_minfo *dinfo = gost_digest_array;
for (; dinfo->nid; dinfo++) {
if (!EVP_add_digest(dinfo->digest()))
goto end;
if (dinfo->alias &&
!EVP_add_digest_alias(dinfo->sn, dinfo->alias))
goto end;
}
ENGINE_register_all_complete();
ERR_load_GOST_strings();
ret = 1;
end:
return ret;
}
#ifndef OPENSSL_NO_DYNAMIC_ENGINE
IMPLEMENT_DYNAMIC_BIND_FN(bind_gost)
IMPLEMENT_DYNAMIC_CHECK_FN()
#endif /* ndef OPENSSL_NO_DYNAMIC_ENGINE */
/* ENGINE_DIGESTS_PTR callback installed by ENGINE_set_digests */
static int gost_digests(ENGINE *e, const EVP_MD **digest,
const int **nids, int nid)
{
struct gost_digest_minfo *info = gost_digest_array;
if (!digest) {
int *n = known_digest_nids;
*nids = n;
for (; info->nid; info++)
*n++ = info->nid;
return OSSL_NELEM(known_digest_nids);
}
for (; info->nid; info++)
if (nid == info->nid) {
*digest = info->digest();
return 1;
}
*digest = NULL;
return 0;
}
/* ENGINE_CIPHERS_PTR callback installed by ENGINE_set_ciphers */
static int gost_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
const int **nids, int nid)
{
struct gost_cipher_minfo *info = gost_cipher_array;
if (!cipher) {
int *n = known_cipher_nids;
*nids = n;
for (; info->nid; info++)
*n++ = info->nid;
return OSSL_NELEM(known_cipher_nids);
}
for (; info->nid; info++)
if (nid == info->nid) {
*cipher = info->cipher();
return 1;
}
*cipher = NULL;
return 0;
}
static int gost_meth_nids(const int **nids)
{
struct gost_meth_minfo *info = gost_meth_array;
int *n = known_meths_nids;
*nids = n;
for (; info->nid; info++)
*n++ = info->nid;
return OSSL_NELEM(known_meths_nids);
}
/* ENGINE_PKEY_METHS_PTR installed by ENGINE_set_pkey_meths */
static int gost_pkey_meths(ENGINE *e, EVP_PKEY_METHOD **pmeth,
const int **nids, int nid)
{
struct gost_meth_minfo *info;
if (!pmeth)
return gost_meth_nids(nids);
for (info = gost_meth_array; info->nid; info++)
if (nid == info->nid) {
*pmeth = *info->pmeth;
return 1;
}
*pmeth = NULL;
return 0;
}
/* ENGINE_PKEY_ASN1_METHS_PTR installed by ENGINE_set_pkey_asn1_meths */
static int gost_pkey_asn1_meths(ENGINE *e, EVP_PKEY_ASN1_METHOD **ameth,
const int **nids, int nid)
{
struct gost_meth_minfo *info;
if (!ameth)
return gost_meth_nids(nids);
for (info = gost_meth_array; info->nid; info++)
if (nid == info->nid) {
*ameth = *info->ameth;
return 1;
}
*ameth = NULL;
return 0;
}
#ifdef OPENSSL_NO_DYNAMIC_ENGINE
static ENGINE* engine_gost(void) {
ENGINE* ret = ENGINE_new();
if (!ret)
return NULL;
if (!bind_gost(ret, engine_gost_id)) {
ENGINE_free(ret);
return NULL;
}
return ret;
}
void ENGINE_load_gost(void) {
ENGINE* toadd;
if (pmeth_GostR3410_2001)
return;
toadd = engine_gost();
if (!toadd)
return;
ENGINE_add(toadd);
ENGINE_free(toadd);
ERR_clear_error();
}
#endif
|