/*
- * tlsproxy is a transparent TLS proxy for HTTPS connections.
+ * tlsproxy is a TLS proxy for HTTPS which intercepts the connections and
+ * ensures the server certificate doesn't change. Normally this isn't detected
+ * if a trusted CA for the new server certificate is installed.
*
* Copyright (C) 2011 Simon Ruderich
*
static SEM *ringbuffer_lock; /* Read lock. */
+#ifdef DEBUG
static void sigint_handler(int signal);
+#endif
static void parse_arguments(int argc, char **argv);
static void print_usage(const char *argv);
int main(int argc, char **argv) {
int port;
int client_socket, server_socket;
+#ifdef USE_IPV4_ONLY
+ struct sockaddr_in server_in;
+#else
struct sockaddr_in6 server_in;
+#endif
size_t i;
pthread_t *threads;
}
/* Setup our SIGINT signal handler which allows a "normal" termination of
- * the server. */
+ * the server in DEBUG mode. */
sigemptyset(&action.sa_mask);
- action.sa_handler = sigint_handler;
action.sa_flags = 0;
+#ifdef DEBUG
+ action.sa_handler = sigint_handler;
sigaction(SIGINT, &action, NULL);
+#endif
/* Ignore SIGPIPEs. */
action.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &action, NULL);
(void * (*)(void *))&worker_thread,
NULL);
if (0 != result) {
- printf("failed to create worker thread: %s\n", strerror(result));
+ fprintf(stderr, "failed to create worker thread: %s\n",
+ strerror(result));
return EXIT_FAILURE;
}
threads[i] = thread;
}
+#ifdef USE_IPV4_ONLY
+ server_socket = socket(PF_INET, SOCK_STREAM, 0);
+#else
server_socket = socket(PF_INET6, SOCK_STREAM, 0);
+#endif
if (-1 == server_socket) {
perror("socket()");
return EXIT_FAILURE;
}
-#ifdef DEBUG
/* Fast rebinding for debug mode, could cause invalid packets. */
- {
+ if (LOG_DEBUG <= global_log_level) {
int socket_option = 1;
setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR,
&socket_option, sizeof(socket_option));
}
-#endif
/* Bind to the listen socket. */
memset(&server_in, 0, sizeof(server_in));
+#ifdef USE_IPV4_ONLY
+ server_in.sin_family = AF_INET; /* IPv4 only */
+ server_in.sin_addr.s_addr = htonl(INADDR_ANY); /* bind to any address */
+ server_in.sin_port = htons((uint16_t)port); /* port to bind to */
+#else
server_in.sin6_family = AF_INET6; /* IPv6 (and IPv4) */
server_in.sin6_addr = in6addr_any; /* bind to any address */
server_in.sin6_port = htons((uint16_t)port); /* port to bind to */
+#endif
if (-1 == bind(server_socket, (struct sockaddr *)&server_in,
sizeof(server_in))) {
perror("bind()");
return EXIT_FAILURE;
}
+#ifdef DEBUG
static void sigint_handler(int signal_number) {
(void)signal_number;
done = 1;
}
+#endif
static void parse_arguments(int argc, char **argv) {
int option;
#else
global_log_level = LOG_WARNING;
#endif
+ global_passthrough_unknown = 0;
- while (-1 != (option = getopt(argc, argv, "d:p:t:h?"))) {
+ while (-1 != (option = getopt(argc, argv, "d:p:t:uh?"))) {
switch (option) {
case 'd': {
if (0 > atoi(optarg)) {
thread_count = (size_t)atoi(optarg);
break;
}
+ case 'u': {
+ global_passthrough_unknown = 1;
+ break;
+ }
case 'h':
default: /* '?' */
print_usage(argv[0]);
}
}
static void print_usage(const char *argv) {
- fprintf(stderr, "Usage: %s [-d level] [-p host:port] [-t count] port\n",
+ fprintf(stderr, "Usage: %s [-d level] [-p host:port] [-t count] [-u] port\n",
argv);
fprintf(stderr, "\n");
fprintf(stderr, "-d debug level: 0=errors only, 2=debug [default: 1]\n");
fprintf(stderr, "-p proxy hostname and port\n");
fprintf(stderr, "-t number of threads [default: 10]\n");
+ fprintf(stderr, "-u passthrough connection if no certificate is stored \
+[default: error]\n");
+ fprintf(stderr, " WARNING: might be a security problem!\n");
}
static void initialize_gnutls(void) {
GNUTLS_ERROR_EXIT(result, "gnutls_global_init()");
/* Setup GnuTLS cipher suites. */
- result = gnutls_priority_init(&tls_priority_cache, "NORMAL", NULL);
+ result = gnutls_priority_init(&global_tls_priority_cache, "NORMAL", NULL);
GNUTLS_ERROR_EXIT(result, "gnutls_priority_init()");
/* Generate Diffie-Hellman parameters. */
- result = gnutls_dh_params_init(&tls_dh_params);
+ result = gnutls_dh_params_init(&global_tls_dh_params);
GNUTLS_ERROR_EXIT(result, "gnutls_dh_params_init()");
- result = gnutls_dh_params_generate2(tls_dh_params, DH_SIZE);
+ result = gnutls_dh_params_generate2(global_tls_dh_params, DH_SIZE);
GNUTLS_ERROR_EXIT(result, "gnutls_dh_params_generate2()");
}
static void deinitialize_gnutls(void) {
- gnutls_dh_params_deinit(tls_dh_params);
- gnutls_priority_deinit(tls_priority_cache);
+ gnutls_dh_params_deinit(global_tls_dh_params);
+ gnutls_priority_deinit(global_tls_priority_cache);
gnutls_global_deinit();
}