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/*
* Copyright (C) 2020-2022 Red Hat, Inc.
*
* Authors: Ondrej Moris, Zoltan Fridrich
*
* This file is part of GnuTLS.
*
* The GnuTLS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>
*
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_DL_ITERATE_PHDR
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
#include <link.h>
#include "dirname.h"
#include "errors.h"
#define FORMAT_VERSION 1
/* These only works with the platform where SONAME is part of the ABI. */
#ifndef GNUTLS_LIBRARY_SONAME
#define GNUTLS_LIBRARY_SONAME "none"
#endif
#define HMAC_SIZE 32
#define HMAC_ALGO GNUTLS_MAC_SHA256
#define HMAC_STR_SIZE (2 * HMAC_SIZE + 1)
static int get_hmac(const char *path, char *hmac, size_t hmac_size)
{
int ret;
size_t size;
uint8_t buffer[HMAC_SIZE];
gnutls_datum_t hex = { buffer, sizeof(buffer) };
gnutls_datum_t data = { NULL, 0 };
ret = gnutls_load_file(path, &data);
if (ret < 0)
return gnutls_assert_val(ret);
GNUTLS_FIPS140_SET_LAX_MODE();
ret = gnutls_hmac_fast(HMAC_ALGO, FIPS_KEY, sizeof(FIPS_KEY) - 1,
data.data, data.size, buffer);
GNUTLS_FIPS140_SET_STRICT_MODE();
gnutls_free(data.data);
if (ret < 0)
return gnutls_assert_val(ret);
size = hmac_size;
ret = gnutls_hex_encode(&hex, hmac, &size);
if (ret < 0)
return gnutls_assert_val(ret);
return 0;
}
static int print_lib(const char *path, const char *soname)
{
int ret;
char *real_path = NULL;
char hmac[HMAC_STR_SIZE];
real_path = canonicalize_file_name(path);
if (real_path == NULL) {
fprintf(stderr, "Could not get realpath from %s\n", path);
ret = GNUTLS_E_FILE_ERROR;
goto cleanup;
}
ret = get_hmac(real_path, hmac, sizeof(hmac));
if (ret < 0) {
fprintf(stderr, "Could not calculate HMAC for %s: %s\n",
last_component(real_path), gnutls_strerror(ret));
goto cleanup;
}
printf("[%s]\n", soname);
printf("path = %s\n", real_path);
printf("hmac = %s\n", hmac);
cleanup:
free(real_path);
return ret;
}
static int callback(struct dl_phdr_info *info, size_t size, void *data)
{
const char *path = info->dlpi_name;
const char *soname = last_component(path);
if (!strcmp(soname, GNUTLS_LIBRARY_SONAME))
return print_lib(data ? data : path, soname);
#ifdef NETTLE_LIBRARY_SONAME
if (!strcmp(soname, NETTLE_LIBRARY_SONAME))
return print_lib(path, soname);
#endif
#ifdef HOGWEED_LIBRARY_SONAME
if (!strcmp(soname, HOGWEED_LIBRARY_SONAME))
return print_lib(path, soname);
#endif
#ifdef GMP_LIBRARY_SONAME
if (!strcmp(soname, GMP_LIBRARY_SONAME))
return print_lib(path, soname);
#endif
return 0;
}
int main(int argc, char **argv)
{
if (argc != 1 && argc != 2) {
fprintf(stderr, "Usage: %s [gnutls_so_path]\n",
last_component(argv[0]));
return EXIT_FAILURE;
}
printf("[global]\n");
printf("format-version = %d\n", FORMAT_VERSION);
return dl_iterate_phdr(callback, argc == 2 ? argv[1] : NULL);
}
#else
int main(void)
{
fprintf(stderr, "Function dl_iterate_phdr is missing\n");
return EXIT_FAILURE;
}
#endif /* HAVE_DL_ITERATE_PHDR */
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