820 lines
25 KiB
C
820 lines
25 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2007 - 2008, Digium, Inc.
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*
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* Luigi Rizzo (TCP and TLS server code)
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* Brett Bryant <brettbryant@gmail.com> (updated for client support)
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*!
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* \file
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* \brief Code to support TCP and TLS server/client
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*
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* \author Luigi Rizzo
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* \author Brett Bryant <brettbryant@gmail.com>
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#include <signal.h>
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#include <sys/stat.h>
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#include "asterisk/compat.h"
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#include "asterisk/tcptls.h"
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#include "asterisk/http.h"
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#include "asterisk/utils.h"
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#include "asterisk/strings.h"
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#include "asterisk/options.h"
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#include "asterisk/manager.h"
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#include "asterisk/astobj2.h"
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#include "asterisk/pbx.h"
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#include "asterisk/app.h"
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static void session_instance_destructor(void *obj)
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{
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struct ast_tcptls_session_instance *i = obj;
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if (i->stream) {
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ast_iostream_close(i->stream);
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i->stream = NULL;
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}
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ast_free(i->overflow_buf);
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ao2_cleanup(i->private_data);
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}
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#ifdef DO_SSL
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static int check_tcptls_cert_name(ASN1_STRING *cert_str, const char *hostname, const char *desc)
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{
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unsigned char *str;
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int ret;
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ret = ASN1_STRING_to_UTF8(&str, cert_str);
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if (ret < 0 || !str) {
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return -1;
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}
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if (strlen((char *) str) != ret) {
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ast_log(LOG_WARNING, "Invalid certificate %s length (contains NULL bytes?)\n", desc);
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ret = -1;
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} else if (!strcasecmp(hostname, (char *) str)) {
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ret = 0;
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} else {
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ret = -1;
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}
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ast_debug(3, "SSL %s compare s1='%s' s2='%s'\n", desc, hostname, str);
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OPENSSL_free(str);
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return ret;
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}
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#endif
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/*! \brief
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* creates a FILE * from the fd passed by the accept thread.
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* This operation is potentially expensive (certificate verification),
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* so we do it in the child thread context.
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*
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* \note must decrement ref count before returning NULL on error
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*/
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static void *handle_tcptls_connection(void *data)
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{
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struct ast_tcptls_session_instance *tcptls_session = data;
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#ifdef DO_SSL
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SSL *ssl;
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#endif
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/* TCP/TLS connections are associated with external protocols, and
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* should not be allowed to execute 'dangerous' functions. This may
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* need to be pushed down into the individual protocol handlers, but
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* this seems like a good general policy.
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*/
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if (ast_thread_inhibit_escalations()) {
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ast_log(LOG_ERROR, "Failed to inhibit privilege escalations; killing connection\n");
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ast_tcptls_close_session_file(tcptls_session);
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ao2_ref(tcptls_session, -1);
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return NULL;
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}
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if (tcptls_session->parent->tls_cfg) {
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#ifdef DO_SSL
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if (ast_iostream_start_tls(&tcptls_session->stream, tcptls_session->parent->tls_cfg->ssl_ctx, tcptls_session->client) < 0) {
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ast_tcptls_close_session_file(tcptls_session);
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ao2_ref(tcptls_session, -1);
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return NULL;
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}
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ssl = ast_iostream_get_ssl(tcptls_session->stream);
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if ((tcptls_session->client && !ast_test_flag(&tcptls_session->parent->tls_cfg->flags, AST_SSL_DONT_VERIFY_SERVER))
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|| (!tcptls_session->client && ast_test_flag(&tcptls_session->parent->tls_cfg->flags, AST_SSL_VERIFY_CLIENT))) {
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X509 *peer;
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long res;
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peer = SSL_get_peer_certificate(ssl);
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if (!peer) {
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ast_log(LOG_ERROR, "No peer SSL certificate to verify\n");
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ast_tcptls_close_session_file(tcptls_session);
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ao2_ref(tcptls_session, -1);
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return NULL;
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}
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res = SSL_get_verify_result(ssl);
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if (res != X509_V_OK) {
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ast_log(LOG_ERROR, "Certificate did not verify: %s\n", X509_verify_cert_error_string(res));
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X509_free(peer);
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ast_tcptls_close_session_file(tcptls_session);
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ao2_ref(tcptls_session, -1);
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return NULL;
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}
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if (!ast_test_flag(&tcptls_session->parent->tls_cfg->flags, AST_SSL_IGNORE_COMMON_NAME)) {
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ASN1_STRING *str;
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X509_NAME *name = X509_get_subject_name(peer);
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STACK_OF(GENERAL_NAME) *alt_names;
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int pos = -1;
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int found = 0;
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for (;;) {
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/* Walk the certificate to check all available "Common Name" */
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/* XXX Probably should do a gethostbyname on the hostname and compare that as well */
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pos = X509_NAME_get_index_by_NID(name, NID_commonName, pos);
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if (pos < 0) {
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break;
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}
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str = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(name, pos));
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if (!check_tcptls_cert_name(str, tcptls_session->parent->hostname, "common name")) {
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found = 1;
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break;
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}
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}
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if (!found) {
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alt_names = X509_get_ext_d2i(peer, NID_subject_alt_name, NULL, NULL);
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if (alt_names != NULL) {
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int alt_names_count = sk_GENERAL_NAME_num(alt_names);
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for (pos = 0; pos < alt_names_count; pos++) {
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const GENERAL_NAME *alt_name = sk_GENERAL_NAME_value(alt_names, pos);
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if (alt_name->type != GEN_DNS) {
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continue;
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}
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if (!check_tcptls_cert_name(alt_name->d.dNSName, tcptls_session->parent->hostname, "alt name")) {
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found = 1;
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break;
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}
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}
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sk_GENERAL_NAME_pop_free(alt_names, GENERAL_NAME_free);
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}
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}
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if (!found) {
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ast_log(LOG_ERROR, "Certificate common name did not match (%s)\n", tcptls_session->parent->hostname);
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X509_free(peer);
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ast_tcptls_close_session_file(tcptls_session);
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ao2_ref(tcptls_session, -1);
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return NULL;
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}
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}
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X509_free(peer);
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}
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#else
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ast_log(LOG_ERROR, "Attempted a TLS connection without OpenSSL support. This will not work!\n");
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ast_tcptls_close_session_file(tcptls_session);
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ao2_ref(tcptls_session, -1);
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return NULL;
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#endif /* DO_SSL */
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}
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if (tcptls_session->parent->worker_fn) {
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return tcptls_session->parent->worker_fn(tcptls_session);
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} else {
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return tcptls_session;
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}
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}
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void *ast_tcptls_server_root(void *data)
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{
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struct ast_tcptls_session_args *desc = data;
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int fd;
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struct ast_sockaddr addr;
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struct ast_tcptls_session_instance *tcptls_session;
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pthread_t launched;
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for (;;) {
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int i, flags;
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if (desc->periodic_fn) {
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desc->periodic_fn(desc);
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}
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i = ast_wait_for_input(desc->accept_fd, desc->poll_timeout);
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if (i <= 0) {
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continue;
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}
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fd = ast_accept(desc->accept_fd, &addr);
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if (fd < 0) {
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if ((errno != EAGAIN) && (errno != EWOULDBLOCK) && (errno != EINTR) && (errno != ECONNABORTED)) {
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ast_log(LOG_ERROR, "Accept failed: %s\n", strerror(errno));
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break;
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}
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continue;
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}
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tcptls_session = ao2_alloc(sizeof(*tcptls_session), session_instance_destructor);
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if (!tcptls_session) {
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ast_log(LOG_WARNING, "No memory for new session: %s\n", strerror(errno));
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if (close(fd)) {
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ast_log(LOG_ERROR, "close() failed: %s\n", strerror(errno));
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}
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continue;
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}
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tcptls_session->overflow_buf = ast_str_create(128);
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flags = fcntl(fd, F_GETFL);
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fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
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tcptls_session->stream = ast_iostream_from_fd(&fd);
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if (!tcptls_session->stream) {
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ast_log(LOG_WARNING, "No memory for new session iostream\n");
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continue;
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}
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tcptls_session->parent = desc;
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ast_sockaddr_copy(&tcptls_session->remote_address, &addr);
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tcptls_session->client = 0;
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/* This thread is now the only place that controls the single ref to tcptls_session */
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if (ast_pthread_create_detached_background(&launched, NULL, handle_tcptls_connection, tcptls_session)) {
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ast_log(LOG_ERROR, "Unable to launch helper thread: %s\n", strerror(errno));
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ast_tcptls_close_session_file(tcptls_session);
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ao2_ref(tcptls_session, -1);
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}
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}
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return NULL;
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}
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#ifdef DO_SSL
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static void __ssl_setup_certs(struct ast_tls_config *cfg, const size_t cert_file_len, const char *key_type_extension, const char *key_type)
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{
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char *cert_file = ast_strdupa(cfg->certfile);
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memcpy(cert_file + cert_file_len - 8, key_type_extension, 5);
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if (access(cert_file, F_OK) == 0) {
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if (SSL_CTX_use_certificate_chain_file(cfg->ssl_ctx, cert_file) == 0) {
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ast_log(LOG_WARNING, "TLS/SSL error loading public %s key (certificate) from <%s>.\n", key_type, cert_file);
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} else if (SSL_CTX_use_PrivateKey_file(cfg->ssl_ctx, cert_file, SSL_FILETYPE_PEM) == 0) {
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ast_log(LOG_WARNING, "TLS/SSL error loading private %s key from <%s>.\n", key_type, cert_file);
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} else if (SSL_CTX_check_private_key(cfg->ssl_ctx) == 0) {
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ast_log(LOG_WARNING, "TLS/SSL error matching private %s key and certificate in <%s>.\n", key_type, cert_file);
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}
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}
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}
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#endif
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static int __ssl_setup(struct ast_tls_config *cfg, int client)
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{
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#ifndef DO_SSL
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cfg->enabled = 0;
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return 0;
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#else
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int disable_ssl = 0;
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long ssl_opts = 0;
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if (!cfg->enabled) {
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return 0;
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}
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/* Get rid of an old SSL_CTX since we're about to
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* allocate a new one
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*/
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if (cfg->ssl_ctx) {
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SSL_CTX_free(cfg->ssl_ctx);
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cfg->ssl_ctx = NULL;
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}
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if (client) {
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#if !defined(OPENSSL_NO_SSL2) && (OPENSSL_VERSION_NUMBER < 0x10100000L)
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if (ast_test_flag(&cfg->flags, AST_SSL_SSLV2_CLIENT)) {
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ast_log(LOG_WARNING, "Usage of SSLv2 is discouraged due to known vulnerabilities. Please use 'tlsv1' or leave the TLS method unspecified!\n");
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cfg->ssl_ctx = SSL_CTX_new(SSLv2_client_method());
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} else
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#endif
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#ifndef OPENSSL_NO_SSL3_METHOD
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if (ast_test_flag(&cfg->flags, AST_SSL_SSLV3_CLIENT)) {
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ast_log(LOG_WARNING, "Usage of SSLv3 is discouraged due to known vulnerabilities. Please use 'tlsv1' or leave the TLS method unspecified!\n");
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cfg->ssl_ctx = SSL_CTX_new(SSLv3_client_method());
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} else
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#endif
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if (ast_test_flag(&cfg->flags, AST_SSL_TLSV1_CLIENT)) {
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cfg->ssl_ctx = SSL_CTX_new(TLSv1_client_method());
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} else {
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disable_ssl = 1;
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cfg->ssl_ctx = SSL_CTX_new(SSLv23_client_method());
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}
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} else {
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disable_ssl = 1;
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cfg->ssl_ctx = SSL_CTX_new(SSLv23_server_method());
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}
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if (!cfg->ssl_ctx) {
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ast_debug(1, "Sorry, SSL_CTX_new call returned null...\n");
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cfg->enabled = 0;
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return 0;
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}
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/* Due to the POODLE vulnerability, completely disable
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* SSLv2 and SSLv3 if we are not explicitly told to use
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* them. SSLv23_*_method supports TLSv1+.
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*/
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if (disable_ssl) {
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ssl_opts |= SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3;
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}
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if (ast_test_flag(&cfg->flags, AST_SSL_SERVER_CIPHER_ORDER)) {
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ssl_opts |= SSL_OP_CIPHER_SERVER_PREFERENCE;
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}
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if (ast_test_flag(&cfg->flags, AST_SSL_DISABLE_TLSV1)) {
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ssl_opts |= SSL_OP_NO_TLSv1;
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}
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#if defined(HAVE_SSL_OP_NO_TLSV1_1) && defined(HAVE_SSL_OP_NO_TLSV1_2)
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if (ast_test_flag(&cfg->flags, AST_SSL_DISABLE_TLSV11)) {
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ssl_opts |= SSL_OP_NO_TLSv1_1;
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}
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if (ast_test_flag(&cfg->flags, AST_SSL_DISABLE_TLSV12)) {
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ssl_opts |= SSL_OP_NO_TLSv1_2;
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}
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#else
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ast_log(LOG_WARNING, "Your version of OpenSSL leaves you potentially vulnerable "
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"to the SSL BEAST attack. Please upgrade to OpenSSL 1.0.1 or later\n");
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#endif
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SSL_CTX_set_options(cfg->ssl_ctx, ssl_opts);
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SSL_CTX_set_verify(cfg->ssl_ctx,
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ast_test_flag(&cfg->flags, AST_SSL_VERIFY_CLIENT) ? SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT : SSL_VERIFY_NONE,
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NULL);
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if (!ast_strlen_zero(cfg->certfile)) {
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char *tmpprivate = ast_strlen_zero(cfg->pvtfile) ? cfg->certfile : cfg->pvtfile;
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if (SSL_CTX_use_certificate_chain_file(cfg->ssl_ctx, cfg->certfile) == 0) {
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if (!client) {
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/* Clients don't need a certificate, but if its setup we can use it */
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ast_log(LOG_ERROR, "TLS/SSL error loading cert file. <%s>\n", cfg->certfile);
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cfg->enabled = 0;
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SSL_CTX_free(cfg->ssl_ctx);
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cfg->ssl_ctx = NULL;
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return 0;
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}
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}
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if ((SSL_CTX_use_PrivateKey_file(cfg->ssl_ctx, tmpprivate, SSL_FILETYPE_PEM) == 0) || (SSL_CTX_check_private_key(cfg->ssl_ctx) == 0 )) {
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if (!client) {
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/* Clients don't need a private key, but if its setup we can use it */
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ast_log(LOG_ERROR, "TLS/SSL error loading private key file. <%s>\n", tmpprivate);
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cfg->enabled = 0;
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SSL_CTX_free(cfg->ssl_ctx);
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cfg->ssl_ctx = NULL;
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return 0;
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}
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}
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if (!client) {
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size_t certfile_len = strlen(cfg->certfile);
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/* expects a file name which contains _rsa. like asterisk_rsa.pem
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* ignores any 3-character file-extension like .pem, .cer, .crt
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*/
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if (certfile_len >= 8 && !strncmp(cfg->certfile + certfile_len - 8, "_rsa.", 5)) {
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__ssl_setup_certs(cfg, certfile_len, "_ecc.", "ECC");
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__ssl_setup_certs(cfg, certfile_len, "_dsa.", "DSA");
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}
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}
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}
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if (!ast_strlen_zero(cfg->cipher)) {
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if (SSL_CTX_set_cipher_list(cfg->ssl_ctx, cfg->cipher) == 0 ) {
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if (!client) {
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ast_log(LOG_ERROR, "TLS/SSL cipher error <%s>\n", cfg->cipher);
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cfg->enabled = 0;
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SSL_CTX_free(cfg->ssl_ctx);
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cfg->ssl_ctx = NULL;
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return 0;
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}
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}
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}
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if (!ast_strlen_zero(cfg->cafile) || !ast_strlen_zero(cfg->capath)) {
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if (SSL_CTX_load_verify_locations(cfg->ssl_ctx, S_OR(cfg->cafile, NULL), S_OR(cfg->capath,NULL)) == 0) {
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ast_log(LOG_ERROR, "TLS/SSL CA file(%s)/path(%s) error\n", cfg->cafile, cfg->capath);
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}
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}
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#ifdef HAVE_OPENSSL_EC
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if (!ast_strlen_zero(cfg->pvtfile)) {
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BIO *bio = BIO_new_file(cfg->pvtfile, "r");
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if (bio != NULL) {
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DH *dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
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if (dh != NULL) {
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if (SSL_CTX_set_tmp_dh(cfg->ssl_ctx, dh)) {
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long options = SSL_OP_CIPHER_SERVER_PREFERENCE | SSL_OP_SINGLE_DH_USE | SSL_OP_SINGLE_ECDH_USE;
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options = SSL_CTX_set_options(cfg->ssl_ctx, options);
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ast_verb(2, "TLS/SSL DH initialized, PFS cipher-suites enabled\n");
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}
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DH_free(dh);
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}
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BIO_free(bio);
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}
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}
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#ifndef SSL_CTRL_SET_ECDH_AUTO
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#define SSL_CTRL_SET_ECDH_AUTO 94
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#endif
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/* SSL_CTX_set_ecdh_auto(cfg->ssl_ctx, on); requires OpenSSL 1.0.2 which wraps: */
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if (SSL_CTX_ctrl(cfg->ssl_ctx, SSL_CTRL_SET_ECDH_AUTO, 1, NULL)) {
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ast_verb(2, "TLS/SSL ECDH initialized (automatic), faster PFS ciphers enabled\n");
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} else {
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/* enables AES-128 ciphers, to get AES-256 use NID_secp384r1 */
|
|
EC_KEY *ecdh = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
|
|
if (ecdh != NULL) {
|
|
if (SSL_CTX_set_tmp_ecdh(cfg->ssl_ctx, ecdh)) {
|
|
ast_verb(2, "TLS/SSL ECDH initialized (secp256r1), faster PFS cipher-suites enabled\n");
|
|
}
|
|
EC_KEY_free(ecdh);
|
|
}
|
|
}
|
|
|
|
#endif /* #ifdef HAVE_OPENSSL_EC */
|
|
|
|
ast_verb(2, "TLS/SSL certificate ok\n"); /* We should log which one that is ok. This message doesn't really make sense in production use */
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
int ast_ssl_setup(struct ast_tls_config *cfg)
|
|
{
|
|
return __ssl_setup(cfg, 0);
|
|
}
|
|
|
|
void ast_ssl_teardown(struct ast_tls_config *cfg)
|
|
{
|
|
#ifdef DO_SSL
|
|
if (cfg->ssl_ctx) {
|
|
SSL_CTX_free(cfg->ssl_ctx);
|
|
cfg->ssl_ctx = NULL;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
struct ast_tcptls_session_instance *ast_tcptls_client_start(struct ast_tcptls_session_instance *tcptls_session)
|
|
{
|
|
struct ast_tcptls_session_args *desc;
|
|
int flags;
|
|
|
|
if (!(desc = tcptls_session->parent)) {
|
|
goto client_start_error;
|
|
}
|
|
|
|
if (ast_connect(desc->accept_fd, &desc->remote_address)) {
|
|
ast_log(LOG_ERROR, "Unable to connect %s to %s: %s\n",
|
|
desc->name,
|
|
ast_sockaddr_stringify(&desc->remote_address),
|
|
strerror(errno));
|
|
goto client_start_error;
|
|
}
|
|
|
|
flags = fcntl(desc->accept_fd, F_GETFL);
|
|
fcntl(desc->accept_fd, F_SETFL, flags & ~O_NONBLOCK);
|
|
|
|
if (desc->tls_cfg) {
|
|
desc->tls_cfg->enabled = 1;
|
|
__ssl_setup(desc->tls_cfg, 1);
|
|
}
|
|
|
|
return handle_tcptls_connection(tcptls_session);
|
|
|
|
client_start_error:
|
|
if (desc) {
|
|
close(desc->accept_fd);
|
|
desc->accept_fd = -1;
|
|
}
|
|
ao2_ref(tcptls_session, -1);
|
|
return NULL;
|
|
|
|
}
|
|
|
|
struct ast_tcptls_session_instance *ast_tcptls_client_create(struct ast_tcptls_session_args *desc)
|
|
{
|
|
int fd, x = 1;
|
|
struct ast_tcptls_session_instance *tcptls_session = NULL;
|
|
|
|
/* Do nothing if nothing has changed */
|
|
if (!ast_sockaddr_cmp(&desc->old_address, &desc->remote_address)) {
|
|
ast_debug(1, "Nothing changed in %s\n", desc->name);
|
|
return NULL;
|
|
}
|
|
|
|
/* If we return early, there is no connection */
|
|
ast_sockaddr_setnull(&desc->old_address);
|
|
|
|
if (desc->accept_fd != -1) {
|
|
close(desc->accept_fd);
|
|
}
|
|
|
|
fd = desc->accept_fd = socket(ast_sockaddr_is_ipv6(&desc->remote_address) ?
|
|
AF_INET6 : AF_INET, SOCK_STREAM, IPPROTO_TCP);
|
|
if (desc->accept_fd < 0) {
|
|
ast_log(LOG_ERROR, "Unable to allocate socket for %s: %s\n",
|
|
desc->name, strerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
/* if a local address was specified, bind to it so the connection will
|
|
originate from the desired address */
|
|
if (!ast_sockaddr_isnull(&desc->local_address)) {
|
|
setsockopt(desc->accept_fd, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x));
|
|
if (ast_bind(desc->accept_fd, &desc->local_address)) {
|
|
ast_log(LOG_ERROR, "Unable to bind %s to %s: %s\n",
|
|
desc->name,
|
|
ast_sockaddr_stringify(&desc->local_address),
|
|
strerror(errno));
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
if (!(tcptls_session = ao2_alloc(sizeof(*tcptls_session), session_instance_destructor))) {
|
|
goto error;
|
|
}
|
|
|
|
tcptls_session->overflow_buf = ast_str_create(128);
|
|
tcptls_session->client = 1;
|
|
tcptls_session->stream = ast_iostream_from_fd(&fd);
|
|
if (!tcptls_session->stream) {
|
|
goto error;
|
|
}
|
|
|
|
tcptls_session->parent = desc;
|
|
tcptls_session->parent->worker_fn = NULL;
|
|
ast_sockaddr_copy(&tcptls_session->remote_address,
|
|
&desc->remote_address);
|
|
|
|
/* Set current info */
|
|
ast_sockaddr_copy(&desc->old_address, &desc->remote_address);
|
|
return tcptls_session;
|
|
|
|
error:
|
|
close(desc->accept_fd);
|
|
desc->accept_fd = -1;
|
|
if (tcptls_session) {
|
|
ao2_ref(tcptls_session, -1);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
void ast_tcptls_server_start(struct ast_tcptls_session_args *desc)
|
|
{
|
|
int flags;
|
|
int x = 1;
|
|
int tls_changed = 0;
|
|
|
|
if (desc->tls_cfg) {
|
|
char hash[41];
|
|
char *str = NULL;
|
|
struct stat st;
|
|
|
|
/* Store the hashes of the TLS certificate etc. */
|
|
if (stat(desc->tls_cfg->certfile, &st) || NULL == (str = ast_read_textfile(desc->tls_cfg->certfile))) {
|
|
memset(hash, 0, 41);
|
|
} else {
|
|
ast_sha1_hash(hash, str);
|
|
}
|
|
ast_free(str);
|
|
str = NULL;
|
|
memcpy(desc->tls_cfg->certhash, hash, 41);
|
|
if (stat(desc->tls_cfg->pvtfile, &st) || NULL == (str = ast_read_textfile(desc->tls_cfg->pvtfile))) {
|
|
memset(hash, 0, 41);
|
|
} else {
|
|
ast_sha1_hash(hash, str);
|
|
}
|
|
ast_free(str);
|
|
str = NULL;
|
|
memcpy(desc->tls_cfg->pvthash, hash, 41);
|
|
if (stat(desc->tls_cfg->cafile, &st) || NULL == (str = ast_read_textfile(desc->tls_cfg->cafile))) {
|
|
memset(hash, 0, 41);
|
|
} else {
|
|
ast_sha1_hash(hash, str);
|
|
}
|
|
ast_free(str);
|
|
str = NULL;
|
|
memcpy(desc->tls_cfg->cahash, hash, 41);
|
|
|
|
/* Check whether TLS configuration has changed */
|
|
if (!desc->old_tls_cfg) { /* No previous configuration */
|
|
tls_changed = 1;
|
|
desc->old_tls_cfg = ast_calloc(1, sizeof(*desc->old_tls_cfg));
|
|
} else if (memcmp(desc->tls_cfg->certhash, desc->old_tls_cfg->certhash, 41)) {
|
|
tls_changed = 1;
|
|
} else if (memcmp(desc->tls_cfg->pvthash, desc->old_tls_cfg->pvthash, 41)) {
|
|
tls_changed = 1;
|
|
} else if (strcmp(desc->tls_cfg->cipher, desc->old_tls_cfg->cipher)) {
|
|
tls_changed = 1;
|
|
} else if (memcmp(desc->tls_cfg->cahash, desc->old_tls_cfg->cahash, 41)) {
|
|
tls_changed = 1;
|
|
} else if (strcmp(desc->tls_cfg->capath, desc->old_tls_cfg->capath)) {
|
|
tls_changed = 1;
|
|
} else if (memcmp(&desc->tls_cfg->flags, &desc->old_tls_cfg->flags, sizeof(desc->tls_cfg->flags))) {
|
|
tls_changed = 1;
|
|
}
|
|
|
|
if (tls_changed) {
|
|
ast_debug(1, "Changed parameters for %s found\n", desc->name);
|
|
}
|
|
}
|
|
|
|
/* Do nothing if nothing has changed */
|
|
if (!tls_changed && !ast_sockaddr_cmp(&desc->old_address, &desc->local_address)) {
|
|
ast_debug(1, "Nothing changed in %s\n", desc->name);
|
|
return;
|
|
}
|
|
|
|
/* If we return early, there is no one listening */
|
|
ast_sockaddr_setnull(&desc->old_address);
|
|
|
|
/* Shutdown a running server if there is one */
|
|
if (desc->master != AST_PTHREADT_NULL) {
|
|
pthread_cancel(desc->master);
|
|
pthread_kill(desc->master, SIGURG);
|
|
pthread_join(desc->master, NULL);
|
|
}
|
|
|
|
if (desc->accept_fd != -1) {
|
|
close(desc->accept_fd);
|
|
}
|
|
|
|
/* If there's no new server, stop here */
|
|
if (ast_sockaddr_isnull(&desc->local_address)) {
|
|
ast_debug(2, "Server disabled: %s\n", desc->name);
|
|
return;
|
|
}
|
|
|
|
desc->accept_fd = socket(ast_sockaddr_is_ipv6(&desc->local_address) ?
|
|
AF_INET6 : AF_INET, SOCK_STREAM, 0);
|
|
if (desc->accept_fd < 0) {
|
|
ast_log(LOG_ERROR, "Unable to allocate socket for %s: %s\n", desc->name, strerror(errno));
|
|
return;
|
|
}
|
|
|
|
setsockopt(desc->accept_fd, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x));
|
|
if (ast_bind(desc->accept_fd, &desc->local_address)) {
|
|
ast_log(LOG_ERROR, "Unable to bind %s to %s: %s\n",
|
|
desc->name,
|
|
ast_sockaddr_stringify(&desc->local_address),
|
|
strerror(errno));
|
|
goto error;
|
|
}
|
|
if (listen(desc->accept_fd, 10)) {
|
|
ast_log(LOG_ERROR, "Unable to listen for %s!\n", desc->name);
|
|
goto error;
|
|
}
|
|
flags = fcntl(desc->accept_fd, F_GETFL);
|
|
fcntl(desc->accept_fd, F_SETFL, flags | O_NONBLOCK);
|
|
if (ast_pthread_create_background(&desc->master, NULL, desc->accept_fn, desc)) {
|
|
ast_log(LOG_ERROR, "Unable to launch thread for %s on %s: %s\n",
|
|
desc->name,
|
|
ast_sockaddr_stringify(&desc->local_address),
|
|
strerror(errno));
|
|
goto error;
|
|
}
|
|
|
|
/* Set current info */
|
|
ast_sockaddr_copy(&desc->old_address, &desc->local_address);
|
|
if (desc->old_tls_cfg) {
|
|
ast_free(desc->old_tls_cfg->certfile);
|
|
ast_free(desc->old_tls_cfg->pvtfile);
|
|
ast_free(desc->old_tls_cfg->cipher);
|
|
ast_free(desc->old_tls_cfg->cafile);
|
|
ast_free(desc->old_tls_cfg->capath);
|
|
desc->old_tls_cfg->certfile = ast_strdup(desc->tls_cfg->certfile);
|
|
desc->old_tls_cfg->pvtfile = ast_strdup(desc->tls_cfg->pvtfile);
|
|
desc->old_tls_cfg->cipher = ast_strdup(desc->tls_cfg->cipher);
|
|
desc->old_tls_cfg->cafile = ast_strdup(desc->tls_cfg->cafile);
|
|
desc->old_tls_cfg->capath = ast_strdup(desc->tls_cfg->capath);
|
|
memcpy(desc->old_tls_cfg->certhash, desc->tls_cfg->certhash, 41);
|
|
memcpy(desc->old_tls_cfg->pvthash, desc->tls_cfg->pvthash, 41);
|
|
memcpy(desc->old_tls_cfg->cahash, desc->tls_cfg->cahash, 41);
|
|
memcpy(&desc->old_tls_cfg->flags, &desc->tls_cfg->flags, sizeof(desc->old_tls_cfg->flags));
|
|
}
|
|
|
|
return;
|
|
|
|
error:
|
|
close(desc->accept_fd);
|
|
desc->accept_fd = -1;
|
|
}
|
|
|
|
void ast_tcptls_close_session_file(struct ast_tcptls_session_instance *tcptls_session)
|
|
{
|
|
if (tcptls_session->stream) {
|
|
ast_iostream_close(tcptls_session->stream);
|
|
tcptls_session->stream = NULL;
|
|
} else {
|
|
ast_log(LOG_ERROR, "ast_tcptls_close_session_file invoked on session instance without file or file descriptor\n");
|
|
}
|
|
}
|
|
|
|
void ast_tcptls_server_stop(struct ast_tcptls_session_args *desc)
|
|
{
|
|
if (desc->master != AST_PTHREADT_NULL) {
|
|
pthread_cancel(desc->master);
|
|
pthread_kill(desc->master, SIGURG);
|
|
pthread_join(desc->master, NULL);
|
|
desc->master = AST_PTHREADT_NULL;
|
|
}
|
|
if (desc->accept_fd != -1) {
|
|
close(desc->accept_fd);
|
|
}
|
|
desc->accept_fd = -1;
|
|
|
|
if (desc->old_tls_cfg) {
|
|
ast_free(desc->old_tls_cfg->certfile);
|
|
ast_free(desc->old_tls_cfg->pvtfile);
|
|
ast_free(desc->old_tls_cfg->cipher);
|
|
ast_free(desc->old_tls_cfg->cafile);
|
|
ast_free(desc->old_tls_cfg->capath);
|
|
ast_free(desc->old_tls_cfg);
|
|
desc->old_tls_cfg = NULL;
|
|
}
|
|
|
|
ast_debug(2, "Stopped server :: %s\n", desc->name);
|
|
}
|
|
|
|
int ast_tls_read_conf(struct ast_tls_config *tls_cfg, struct ast_tcptls_session_args *tls_desc, const char *varname, const char *value)
|
|
{
|
|
if (!strcasecmp(varname, "tlsenable") || !strcasecmp(varname, "sslenable")) {
|
|
tls_cfg->enabled = ast_true(value) ? 1 : 0;
|
|
} else if (!strcasecmp(varname, "tlscertfile") || !strcasecmp(varname, "sslcert") || !strcasecmp(varname, "tlscert")) {
|
|
ast_free(tls_cfg->certfile);
|
|
tls_cfg->certfile = ast_strdup(value);
|
|
} else if (!strcasecmp(varname, "tlsprivatekey") || !strcasecmp(varname, "sslprivatekey")) {
|
|
ast_free(tls_cfg->pvtfile);
|
|
tls_cfg->pvtfile = ast_strdup(value);
|
|
} else if (!strcasecmp(varname, "tlscipher") || !strcasecmp(varname, "sslcipher")) {
|
|
ast_free(tls_cfg->cipher);
|
|
tls_cfg->cipher = ast_strdup(value);
|
|
} else if (!strcasecmp(varname, "tlscafile")) {
|
|
ast_free(tls_cfg->cafile);
|
|
tls_cfg->cafile = ast_strdup(value);
|
|
} else if (!strcasecmp(varname, "tlscapath") || !strcasecmp(varname, "tlscadir")) {
|
|
ast_free(tls_cfg->capath);
|
|
tls_cfg->capath = ast_strdup(value);
|
|
} else if (!strcasecmp(varname, "tlsverifyclient")) {
|
|
ast_set2_flag(&tls_cfg->flags, ast_true(value), AST_SSL_VERIFY_CLIENT);
|
|
} else if (!strcasecmp(varname, "tlsdontverifyserver")) {
|
|
ast_set2_flag(&tls_cfg->flags, ast_true(value), AST_SSL_DONT_VERIFY_SERVER);
|
|
} else if (!strcasecmp(varname, "tlsbindaddr") || !strcasecmp(varname, "sslbindaddr")) {
|
|
if (ast_parse_arg(value, PARSE_ADDR, &tls_desc->local_address))
|
|
ast_log(LOG_ERROR, "Invalid %s '%s'\n", varname, value);
|
|
} else if (!strcasecmp(varname, "tlsclientmethod") || !strcasecmp(varname, "sslclientmethod")) {
|
|
if (!strcasecmp(value, "tlsv1")) {
|
|
ast_set_flag(&tls_cfg->flags, AST_SSL_TLSV1_CLIENT);
|
|
ast_clear_flag(&tls_cfg->flags, AST_SSL_SSLV3_CLIENT);
|
|
ast_clear_flag(&tls_cfg->flags, AST_SSL_SSLV2_CLIENT);
|
|
} else if (!strcasecmp(value, "sslv3")) {
|
|
ast_set_flag(&tls_cfg->flags, AST_SSL_SSLV3_CLIENT);
|
|
ast_clear_flag(&tls_cfg->flags, AST_SSL_SSLV2_CLIENT);
|
|
ast_clear_flag(&tls_cfg->flags, AST_SSL_TLSV1_CLIENT);
|
|
} else if (!strcasecmp(value, "sslv2")) {
|
|
ast_set_flag(&tls_cfg->flags, AST_SSL_SSLV2_CLIENT);
|
|
ast_clear_flag(&tls_cfg->flags, AST_SSL_TLSV1_CLIENT);
|
|
ast_clear_flag(&tls_cfg->flags, AST_SSL_SSLV3_CLIENT);
|
|
}
|
|
} else if (!strcasecmp(varname, "tlsservercipherorder")) {
|
|
ast_set2_flag(&tls_cfg->flags, ast_true(value), AST_SSL_SERVER_CIPHER_ORDER);
|
|
} else if (!strcasecmp(varname, "tlsdisablev1")) {
|
|
ast_set2_flag(&tls_cfg->flags, ast_true(value), AST_SSL_DISABLE_TLSV1);
|
|
} else if (!strcasecmp(varname, "tlsdisablev11")) {
|
|
ast_set2_flag(&tls_cfg->flags, ast_true(value), AST_SSL_DISABLE_TLSV11);
|
|
} else if (!strcasecmp(varname, "tlsdisablev12")) {
|
|
ast_set2_flag(&tls_cfg->flags, ast_true(value), AST_SSL_DISABLE_TLSV12);
|
|
} else {
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|