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/*
* relay-network.c - network functions for relay plugin
*
* Copyright (C) 2003-2024 Sébastien Helleu <flashcode@flashtux.org>
*
* This file is part of WeeChat, the extensible chat client.
*
* WeeChat is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* WeeChat 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with WeeChat. If not, see <https://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <unistd.h>
#include <gnutls/gnutls.h>
#include "../weechat-plugin.h"
#include "relay.h"
#include "relay-network.h"
#include "relay-config.h"
int relay_network_init_ok = 0;
int relay_network_init_tls_cert_key_ok = 0;
gnutls_certificate_credentials_t relay_gnutls_x509_cred;
gnutls_priority_t *relay_gnutls_priority_cache = NULL;
gnutls_dh_params_t *relay_gnutls_dh_params = NULL;
/*
* Sets TLS certificate/key file.
*
* If verbose == 1, a message is displayed if successful, otherwise a warning
* (if no cert/key found in file).
*/
void
relay_network_set_tls_cert_key (int verbose)
{
const char *ptr_path;
char *certkey_path;
int ret;
struct t_hashtable *options;
gnutls_certificate_free_credentials (relay_gnutls_x509_cred);
gnutls_certificate_allocate_credentials (&relay_gnutls_x509_cred);
relay_network_init_tls_cert_key_ok = 0;
ptr_path = weechat_config_string (relay_config_network_tls_cert_key);
if (!ptr_path || !ptr_path[0])
{
if (verbose)
{
weechat_printf (NULL,
_("%s%s: no TLS certificate/key found (option "
"relay.network.tls_cert_key is empty)"),
weechat_prefix ("error"), RELAY_PLUGIN_NAME);
}
return;
}
options = weechat_hashtable_new (
32,
WEECHAT_HASHTABLE_STRING,
WEECHAT_HASHTABLE_STRING,
NULL, NULL);
if (options)
weechat_hashtable_set (options, "directory", "config");
certkey_path = weechat_string_eval_path_home (ptr_path,
NULL, NULL, options);
if (options)
weechat_hashtable_free (options);
if (certkey_path && certkey_path[0])
{
if (access (certkey_path, R_OK) == 0)
{
ret = gnutls_certificate_set_x509_key_file (relay_gnutls_x509_cred,
certkey_path,
certkey_path,
GNUTLS_X509_FMT_PEM);
if (ret >= 0)
{
relay_network_init_tls_cert_key_ok = 1;
if (verbose)
{
weechat_printf (NULL,
_("%s: TLS certificate and key have been "
"set"),
RELAY_PLUGIN_NAME);
}
}
else
{
if (verbose)
{
weechat_printf (NULL,
_("%s%s: gnutls error: %s: %s "
"(option relay.network.tls_cert_key)"),
weechat_prefix ("error"),
RELAY_PLUGIN_NAME,
gnutls_strerror_name (ret),
gnutls_strerror (ret));
}
}
}
else
{
if (verbose)
{
weechat_printf (NULL,
_("%s%s: error: file with TLS certificate/key "
"is not readable: \"%s\" "
"(option relay.network.tls_cert_key)"),
weechat_prefix ("error"), RELAY_PLUGIN_NAME,
certkey_path);
}
}
}
if (certkey_path)
free (certkey_path);
}
/*
* Sets gnutls priority cache.
*/
void
relay_network_set_priority ()
{
if (gnutls_priority_init (relay_gnutls_priority_cache,
weechat_config_string (
relay_config_network_tls_priorities),
NULL) != GNUTLS_E_SUCCESS)
{
weechat_printf (NULL,
_("%s%s: unable to initialize priority for TLS"),
weechat_prefix ("error"), RELAY_PLUGIN_NAME);
free (relay_gnutls_priority_cache);
relay_gnutls_priority_cache = NULL;
}
}
/*
* Initializes network for relay.
*/
void
relay_network_init ()
{
relay_network_init_ok = 0;
relay_network_init_tls_cert_key_ok = 0;
/* credentials */
gnutls_certificate_allocate_credentials (&relay_gnutls_x509_cred);
relay_network_set_tls_cert_key (0);
/* priority */
relay_gnutls_priority_cache = malloc (sizeof (*relay_gnutls_priority_cache));
if (relay_gnutls_priority_cache)
relay_network_set_priority ();
relay_network_init_ok = 1;
}
/*
* Ends network for relay.
*/
void
relay_network_end ()
{
if (relay_network_init_ok)
{
if (relay_gnutls_priority_cache)
{
gnutls_priority_deinit (*relay_gnutls_priority_cache);
free (relay_gnutls_priority_cache);
relay_gnutls_priority_cache = NULL;
}
if (relay_gnutls_dh_params)
{
gnutls_dh_params_deinit (*relay_gnutls_dh_params);
free (relay_gnutls_dh_params);
relay_gnutls_dh_params = NULL;
}
gnutls_certificate_free_credentials (relay_gnutls_x509_cred);
relay_network_init_ok = 0;
}
}
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