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openssl/engines/ccgost/gost_pmeth.c
Matt Caswell 8817e2e0c9 Fix return checks in GOST engine 
Filled in lots of return value checks that were missing the GOST engine, and
added appropriate error handling.

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-03-25 12:33:37 +00:00

622 lines
20 KiB
C
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/**********************************************************************
* gost_pmeth.c *
* Copyright (c) 2005-2006 Cryptocom LTD *
* This file is distributed under the same license as OpenSSL *
* *
* Implementation of RFC 4357 (GOST R 34.10) Publick key method *
* for OpenSSL *
* Requires OpenSSL 0.9.9 for compilation *
**********************************************************************/
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/ec.h>
#include <openssl/err.h>
#include <openssl/x509v3.h> /* For string_to_hex */
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "gost_params.h"
#include "gost_lcl.h"
#include "e_gost_err.h"
/* -----init, cleanup, copy - uniform for all algs ---------------*/
/* Allocates new gost_pmeth_data structure and assigns it as data */
static int pkey_gost_init(EVP_PKEY_CTX *ctx)
{
struct gost_pmeth_data *data;
EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
data = OPENSSL_malloc(sizeof(struct gost_pmeth_data));
if (!data)
return 0;
memset(data, 0, sizeof(struct gost_pmeth_data));
if (pkey && EVP_PKEY_get0(pkey)) {
switch (EVP_PKEY_base_id(pkey)) {
case NID_id_GostR3410_94:
data->sign_param_nid = gost94_nid_by_params(EVP_PKEY_get0(pkey));
break;
case NID_id_GostR3410_2001:
data->sign_param_nid =
EC_GROUP_get_curve_name(EC_KEY_get0_group
(EVP_PKEY_get0((EVP_PKEY *)pkey)));
break;
default:
return 0;
}
}
EVP_PKEY_CTX_set_data(ctx, data);
return 1;
}
/* Copies contents of gost_pmeth_data structure */
static int pkey_gost_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
{
struct gost_pmeth_data *dst_data, *src_data;
if (!pkey_gost_init(dst)) {
return 0;
}
src_data = EVP_PKEY_CTX_get_data(src);
dst_data = EVP_PKEY_CTX_get_data(dst);
*dst_data = *src_data;
if (src_data->shared_ukm) {
dst_data->shared_ukm = NULL;
}
return 1;
}
/* Frees up gost_pmeth_data structure */
static void pkey_gost_cleanup(EVP_PKEY_CTX *ctx)
{
struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
if (data->shared_ukm)
OPENSSL_free(data->shared_ukm);
OPENSSL_free(data);
}
/* --------------------- control functions ------------------------------*/
static int pkey_gost_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
{
struct gost_pmeth_data *pctx =
(struct gost_pmeth_data *)EVP_PKEY_CTX_get_data(ctx);
switch (type) {
case EVP_PKEY_CTRL_MD:
{
if (EVP_MD_type((const EVP_MD *)p2) != NID_id_GostR3411_94) {
GOSTerr(GOST_F_PKEY_GOST_CTRL, GOST_R_INVALID_DIGEST_TYPE);
return 0;
}
pctx->md = (EVP_MD *)p2;
return 1;
}
case EVP_PKEY_CTRL_GET_MD:
*(const EVP_MD **)p2 = pctx->md;
return 1;
case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
case EVP_PKEY_CTRL_PKCS7_DECRYPT:
case EVP_PKEY_CTRL_PKCS7_SIGN:
case EVP_PKEY_CTRL_DIGESTINIT:
#ifndef OPENSSL_NO_CMS
case EVP_PKEY_CTRL_CMS_ENCRYPT:
case EVP_PKEY_CTRL_CMS_DECRYPT:
case EVP_PKEY_CTRL_CMS_SIGN:
#endif
return 1;
case EVP_PKEY_CTRL_GOST_PARAMSET:
pctx->sign_param_nid = (int)p1;
return 1;
case EVP_PKEY_CTRL_SET_IV:
pctx->shared_ukm = OPENSSL_malloc((int)p1);
if (pctx->shared_ukm == NULL) {
GOSTerr(GOST_F_PKEY_GOST_CTRL, ERR_R_MALLOC_FAILURE);
return 0;
}
memcpy(pctx->shared_ukm, p2, (int)p1);
return 1;
case EVP_PKEY_CTRL_PEER_KEY:
if (p1 == 0 || p1 == 1) /* call from EVP_PKEY_derive_set_peer */
return 1;
if (p1 == 2) /* TLS: peer key used? */
return pctx->peer_key_used;
if (p1 == 3) /* TLS: peer key used! */
return (pctx->peer_key_used = 1);
return -2;
}
return -2;
}
static int pkey_gost_ctrl94_str(EVP_PKEY_CTX *ctx,
const char *type, const char *value)
{
int param_nid = 0;
if (!strcmp(type, param_ctrl_string)) {
if (!value) {
return 0;
}
if (strlen(value) == 1) {
switch (toupper((unsigned char)value[0])) {
case 'A':
param_nid = NID_id_GostR3410_94_CryptoPro_A_ParamSet;
break;
case 'B':
param_nid = NID_id_GostR3410_94_CryptoPro_B_ParamSet;
break;
case 'C':
param_nid = NID_id_GostR3410_94_CryptoPro_C_ParamSet;
break;
case 'D':
param_nid = NID_id_GostR3410_94_CryptoPro_D_ParamSet;
break;
default:
return 0;
}
} else if ((strlen(value) == 2)
&& (toupper((unsigned char)value[0]) == 'X')) {
switch (toupper((unsigned char)value[1])) {
case 'A':
param_nid = NID_id_GostR3410_94_CryptoPro_XchA_ParamSet;
break;
case 'B':
param_nid = NID_id_GostR3410_94_CryptoPro_XchB_ParamSet;
break;
case 'C':
param_nid = NID_id_GostR3410_94_CryptoPro_XchC_ParamSet;
break;
default:
return 0;
}
} else {
R3410_params *p = R3410_paramset;
param_nid = OBJ_txt2nid(value);
if (param_nid == NID_undef) {
return 0;
}
for (; p->nid != NID_undef; p++) {
if (p->nid == param_nid)
break;
}
if (p->nid == NID_undef) {
GOSTerr(GOST_F_PKEY_GOST_CTRL94_STR, GOST_R_INVALID_PARAMSET);
return 0;
}
}
return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
param_nid, NULL);
}
return -2;
}
static int pkey_gost_ctrl01_str(EVP_PKEY_CTX *ctx,
const char *type, const char *value)
{
int param_nid = 0;
if (!strcmp(type, param_ctrl_string)) {
if (!value) {
return 0;
}
if (strlen(value) == 1) {
switch (toupper((unsigned char)value[0])) {
case 'A':
param_nid = NID_id_GostR3410_2001_CryptoPro_A_ParamSet;
break;
case 'B':
param_nid = NID_id_GostR3410_2001_CryptoPro_B_ParamSet;
break;
case 'C':
param_nid = NID_id_GostR3410_2001_CryptoPro_C_ParamSet;
break;
case '0':
param_nid = NID_id_GostR3410_2001_TestParamSet;
break;
default:
return 0;
}
} else if ((strlen(value) == 2)
&& (toupper((unsigned char)value[0]) == 'X')) {
switch (toupper((unsigned char)value[1])) {
case 'A':
param_nid = NID_id_GostR3410_2001_CryptoPro_XchA_ParamSet;
break;
case 'B':
param_nid = NID_id_GostR3410_2001_CryptoPro_XchB_ParamSet;
break;
default:
return 0;
}
} else {
R3410_2001_params *p = R3410_2001_paramset;
param_nid = OBJ_txt2nid(value);
if (param_nid == NID_undef) {
return 0;
}
for (; p->nid != NID_undef; p++) {
if (p->nid == param_nid)
break;
}
if (p->nid == NID_undef) {
GOSTerr(GOST_F_PKEY_GOST_CTRL01_STR, GOST_R_INVALID_PARAMSET);
return 0;
}
}
return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
param_nid, NULL);
}
return -2;
}
/* --------------------- key generation --------------------------------*/
static int pkey_gost_paramgen_init(EVP_PKEY_CTX *ctx)
{
return 1;
}
static int pkey_gost94_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
DSA *dsa = NULL;
if (data->sign_param_nid == NID_undef) {
GOSTerr(GOST_F_PKEY_GOST94_PARAMGEN, GOST_R_NO_PARAMETERS_SET);
return 0;
}
dsa = DSA_new();
if (!fill_GOST94_params(dsa, data->sign_param_nid)) {
DSA_free(dsa);
return 0;
}
EVP_PKEY_assign(pkey, NID_id_GostR3410_94, dsa);
return 1;
}
static int pkey_gost01_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
EC_KEY *ec = NULL;
if (data->sign_param_nid == NID_undef) {
GOSTerr(GOST_F_PKEY_GOST01_PARAMGEN, GOST_R_NO_PARAMETERS_SET);
return 0;
}
if (!ec)
ec = EC_KEY_new();
if (!fill_GOST2001_params(ec, data->sign_param_nid)) {
EC_KEY_free(ec);
return 0;
}
EVP_PKEY_assign(pkey, NID_id_GostR3410_2001, ec);
return 1;
}
/* Generates Gost_R3410_94_cp key */
static int pkey_gost94cp_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
DSA *dsa;
if (!pkey_gost94_paramgen(ctx, pkey))
return 0;
dsa = EVP_PKEY_get0(pkey);
gost_sign_keygen(dsa);
return 1;
}
/* Generates GOST_R3410 2001 key and assigns it using specified type */
static int pkey_gost01cp_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
EC_KEY *ec;
if (!pkey_gost01_paramgen(ctx, pkey))
return 0;
ec = EVP_PKEY_get0(pkey);
gost2001_keygen(ec);
return 1;
}
/* ----------- sign callbacks --------------------------------------*/
static int pkey_gost94_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
size_t *siglen, const unsigned char *tbs,
size_t tbs_len)
{
DSA_SIG *unpacked_sig = NULL;
EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
if (!siglen)
return 0;
if (!sig) {
*siglen = 64; /* better to check size of pkey->pkey.dsa-q */
return 1;
}
unpacked_sig = gost_do_sign(tbs, tbs_len, EVP_PKEY_get0(pkey));
if (!unpacked_sig) {
return 0;
}
return pack_sign_cp(unpacked_sig, 32, sig, siglen);
}
static int pkey_gost01_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
size_t *siglen, const unsigned char *tbs,
size_t tbs_len)
{
DSA_SIG *unpacked_sig = NULL;
EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
if (!siglen)
return 0;
if (!sig) {
*siglen = 64; /* better to check size of curve order */
return 1;
}
unpacked_sig = gost2001_do_sign(tbs, tbs_len, EVP_PKEY_get0(pkey));
if (!unpacked_sig) {
return 0;
}
return pack_sign_cp(unpacked_sig, 32, sig, siglen);
}
/* ------------------- verify callbacks ---------------------------*/
static int pkey_gost94_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
size_t siglen, const unsigned char *tbs,
size_t tbs_len)
{
int ok = 0;
EVP_PKEY *pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
DSA_SIG *s = unpack_cp_signature(sig, siglen);
if (!s)
return 0;
if (pub_key)
ok = gost_do_verify(tbs, tbs_len, s, EVP_PKEY_get0(pub_key));
DSA_SIG_free(s);
return ok;
}
static int pkey_gost01_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig,
size_t siglen, const unsigned char *tbs,
size_t tbs_len)
{
int ok = 0;
EVP_PKEY *pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
DSA_SIG *s = unpack_cp_signature(sig, siglen);
if (!s)
return 0;
#ifdef DEBUG_SIGN
fprintf(stderr, "R=");
BN_print_fp(stderr, s->r);
fprintf(stderr, "\nS=");
BN_print_fp(stderr, s->s);
fprintf(stderr, "\n");
#endif
if (pub_key)
ok = gost2001_do_verify(tbs, tbs_len, s, EVP_PKEY_get0(pub_key));
DSA_SIG_free(s);
return ok;
}
/* ------------- encrypt init -------------------------------------*/
/* Generates ephermeral key */
static int pkey_gost_encrypt_init(EVP_PKEY_CTX *ctx)
{
return 1;
}
/* --------------- Derive init ------------------------------------*/
static int pkey_gost_derive_init(EVP_PKEY_CTX *ctx)
{
return 1;
}
/* -------- PKEY_METHOD for GOST MAC algorithm --------------------*/
static int pkey_gost_mac_init(EVP_PKEY_CTX *ctx)
{
struct gost_mac_pmeth_data *data;
data = OPENSSL_malloc(sizeof(struct gost_mac_pmeth_data));
if (!data)
return 0;
memset(data, 0, sizeof(struct gost_mac_pmeth_data));
EVP_PKEY_CTX_set_data(ctx, data);
return 1;
}
static void pkey_gost_mac_cleanup(EVP_PKEY_CTX *ctx)
{
struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
OPENSSL_free(data);
}
static int pkey_gost_mac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
{
struct gost_mac_pmeth_data *dst_data, *src_data;
if (!pkey_gost_mac_init(dst)) {
return 0;
}
src_data = EVP_PKEY_CTX_get_data(src);
dst_data = EVP_PKEY_CTX_get_data(dst);
*dst_data = *src_data;
return 1;
}
static int pkey_gost_mac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
{
struct gost_mac_pmeth_data *data =
(struct gost_mac_pmeth_data *)EVP_PKEY_CTX_get_data(ctx);
switch (type) {
case EVP_PKEY_CTRL_MD:
{
if (EVP_MD_type((const EVP_MD *)p2) != NID_id_Gost28147_89_MAC) {
GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,
GOST_R_INVALID_DIGEST_TYPE);
return 0;
}
data->md = (EVP_MD *)p2;
return 1;
}
case EVP_PKEY_CTRL_GET_MD:
*(const EVP_MD **)p2 = data->md;
return 1;
case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
case EVP_PKEY_CTRL_PKCS7_DECRYPT:
case EVP_PKEY_CTRL_PKCS7_SIGN:
return 1;
case EVP_PKEY_CTRL_SET_MAC_KEY:
if (p1 != 32) {
GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL, GOST_R_INVALID_MAC_KEY_LENGTH);
return 0;
}
memcpy(data->key, p2, 32);
data->key_set = 1;
return 1;
case EVP_PKEY_CTRL_DIGESTINIT:
{
EVP_MD_CTX *mctx = p2;
void *key;
if (!data->key_set) {
EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
if (!pkey) {
GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,
GOST_R_MAC_KEY_NOT_SET);
return 0;
}
key = EVP_PKEY_get0(pkey);
if (!key) {
GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,
GOST_R_MAC_KEY_NOT_SET);
return 0;
}
} else {
key = &(data->key);
}
return mctx->digest->md_ctrl(mctx, EVP_MD_CTRL_SET_KEY, 32, key);
}
}
return -2;
}
static int pkey_gost_mac_ctrl_str(EVP_PKEY_CTX *ctx,
const char *type, const char *value)
{
if (!strcmp(type, key_ctrl_string)) {
if (strlen(value) != 32) {
GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR,
GOST_R_INVALID_MAC_KEY_LENGTH);
return 0;
}
return pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
32, (char *)value);
}
if (!strcmp(type, hexkey_ctrl_string)) {
long keylen;
int ret;
unsigned char *keybuf = string_to_hex(value, &keylen);
if (!keybuf || keylen != 32) {
GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR,
GOST_R_INVALID_MAC_KEY_LENGTH);
OPENSSL_free(keybuf);
return 0;
}
ret = pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, 32, keybuf);
OPENSSL_free(keybuf);
return ret;
}
return -2;
}
static int pkey_gost_mac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
unsigned char *keydata;
if (!data->key_set) {
GOSTerr(GOST_F_PKEY_GOST_MAC_KEYGEN, GOST_R_MAC_KEY_NOT_SET);
return 0;
}
keydata = OPENSSL_malloc(32);
if (keydata == NULL)
return 0;
memcpy(keydata, data->key, 32);
EVP_PKEY_assign(pkey, NID_id_Gost28147_89_MAC, keydata);
return 1;
}
static int pkey_gost_mac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
{
return 1;
}
static int pkey_gost_mac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig,
size_t *siglen, EVP_MD_CTX *mctx)
{
unsigned int tmpsiglen = *siglen; /* for platforms where
* sizeof(int)!=sizeof(size_t) */
int ret;
if (!sig) {
*siglen = 4;
return 1;
}
ret = EVP_DigestFinal_ex(mctx, sig, &tmpsiglen);
*siglen = tmpsiglen;
return ret;
}
/* ----------------------------------------------------------------*/
int register_pmeth_gost(int id, EVP_PKEY_METHOD **pmeth, int flags)
{
*pmeth = EVP_PKEY_meth_new(id, flags);
if (!*pmeth)
return 0;
switch (id) {
case NID_id_GostR3410_94:
EVP_PKEY_meth_set_ctrl(*pmeth, pkey_gost_ctrl, pkey_gost_ctrl94_str);
EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost94cp_keygen);
EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost94_cp_sign);
EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost94_cp_verify);
EVP_PKEY_meth_set_encrypt(*pmeth,
pkey_gost_encrypt_init,
pkey_GOST94cp_encrypt);
EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST94cp_decrypt);
EVP_PKEY_meth_set_derive(*pmeth,
pkey_gost_derive_init, pkey_gost94_derive);
EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init,
pkey_gost94_paramgen);
break;
case NID_id_GostR3410_2001:
EVP_PKEY_meth_set_ctrl(*pmeth, pkey_gost_ctrl, pkey_gost_ctrl01_str);
EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost01_cp_sign);
EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost01_cp_verify);
EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost01cp_keygen);
EVP_PKEY_meth_set_encrypt(*pmeth,
pkey_gost_encrypt_init,
pkey_GOST01cp_encrypt);
EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST01cp_decrypt);
EVP_PKEY_meth_set_derive(*pmeth,
pkey_gost_derive_init, pkey_gost2001_derive);
EVP_PKEY_meth_set_paramgen(*pmeth, pkey_gost_paramgen_init,
pkey_gost01_paramgen);
break;
case NID_id_Gost28147_89_MAC:
EVP_PKEY_meth_set_ctrl(*pmeth, pkey_gost_mac_ctrl,
pkey_gost_mac_ctrl_str);
EVP_PKEY_meth_set_signctx(*pmeth, pkey_gost_mac_signctx_init,
pkey_gost_mac_signctx);
EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost_mac_keygen);
EVP_PKEY_meth_set_init(*pmeth, pkey_gost_mac_init);
EVP_PKEY_meth_set_cleanup(*pmeth, pkey_gost_mac_cleanup);
EVP_PKEY_meth_set_copy(*pmeth, pkey_gost_mac_copy);
return 1;
default: /* Unsupported method */
return 0;
}
EVP_PKEY_meth_set_init(*pmeth, pkey_gost_init);
EVP_PKEY_meth_set_cleanup(*pmeth, pkey_gost_cleanup);
EVP_PKEY_meth_set_copy(*pmeth, pkey_gost_copy);
/*
* FIXME derive etc...
*/
return 1;
}
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