--- /dev/null
+/*
+ * Copyright (C) 2004-2012 Free Software Foundation, Inc.
+ * Copyright (C) 2013 Adam Sampson <ats@offog.org>
+ * Copyright (C) 2013-2017 Nikos Mavrogiannopoulos
+ *
+ * Author: Nikos Mavrogiannopoulos
+ *
+ * This file is part of GnuTLS.
+ *
+ * GnuTLS 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.
+ *
+ * GnuTLS 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 GnuTLS; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+/* Parts copied from GnuTLS example programs. */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#if defined(_WIN32)
+
+/* socketpair isn't supported on Win32. */
+int main(int argc, char **argv)
+{
+ exit(77);
+}
+
+#else
+
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <assert.h>
+#include <gnutls/gnutls.h>
+#include "cert-common.h"
+#include "utils.h"
+
+/* A very basic TLS client, with PSK authentication.
+ */
+
+const char *side = "";
+
+static void tls_log_func(int level, const char *str)
+{
+ fprintf(stderr, "%s|<%d>| %s", side, level, str);
+}
+
+static
+int psk_cli_func(gnutls_session_t session, char **username, gnutls_datum_t *key)
+{
+ *username = gnutls_malloc(5);
+ assert(*username != NULL);
+ strcpy(*username, "test");
+
+ key->data = gnutls_malloc(4);
+ assert(key->data != NULL);
+ key->data[0] = 0xDE;
+ key->data[1] = 0xAD;
+ key->data[2] = 0xBE;
+ key->data[3] = 0xEF;
+ key->size = 4;
+
+ return 0;
+}
+
+#define MAX_BUF 1024
+#define MSG "Hello TLS"
+
+static void client(int sd)
+{
+ int ret, ii;
+ gnutls_session_t session;
+ gnutls_certificate_credentials_t clientx509cred;
+ char buffer[MAX_BUF + 1];
+ gnutls_psk_client_credentials_t pskcred;
+ /* Need to enable anonymous KX specifically. */
+
+ global_init();
+ gnutls_global_set_log_function(tls_log_func);
+ if (debug)
+ gnutls_global_set_log_level(4711);
+
+ side = "client";
+
+ gnutls_certificate_allocate_credentials(&clientx509cred);
+
+ gnutls_psk_allocate_client_credentials(&pskcred);
+ gnutls_psk_set_client_credentials_function(pskcred, psk_cli_func);
+
+ /* Initialize TLS session
+ */
+ gnutls_init(&session, GNUTLS_CLIENT);
+
+ /* Use default priorities */
+ gnutls_priority_set_direct(session, "NORMAL:-KX-ALL:+RSA-PSK",
+ NULL);
+
+ /* put the anonymous credentials to the current session
+ */
+ gnutls_credentials_set(session, GNUTLS_CRD_PSK, pskcred);
+ gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
+ clientx509cred);
+
+ gnutls_handshake_set_timeout(session, 20 * 1000);
+ gnutls_transport_set_int(session, sd);
+
+ /* Perform the TLS handshake
+ */
+ ret = gnutls_handshake(session);
+
+ if (ret < 0) {
+ fail("client: Handshake failed\n");
+ gnutls_perror(ret);
+ goto end;
+ } else {
+ if (debug)
+ success("client: Handshake was completed\n");
+ }
+
+ gnutls_record_send(session, MSG, strlen(MSG));
+
+ ret = gnutls_record_recv(session, buffer, MAX_BUF);
+ if (ret == 0) {
+ if (debug)
+ success
+ ("client: Peer has closed the TLS connection\n");
+ goto end;
+ } else if (ret < 0) {
+ fail("client: Error: %s\n", gnutls_strerror(ret));
+ goto end;
+ }
+
+ if (debug) {
+ printf("- Received %d bytes: ", ret);
+ for (ii = 0; ii < ret; ii++) {
+ fputc(buffer[ii], stdout);
+ }
+ fputs("\n", stdout);
+ }
+
+ gnutls_bye(session, GNUTLS_SHUT_RDWR);
+
+ end:
+
+ close(sd);
+
+ gnutls_deinit(session);
+
+ gnutls_psk_free_client_credentials(pskcred);
+ gnutls_certificate_free_credentials(clientx509cred);
+
+ gnutls_global_deinit();
+}
+
+/* This is a sample TLS 1.0 echo server, for PSK authentication.
+ */
+
+#define MAX_BUF 1024
+
+static int
+psk_server_func(gnutls_session_t session, const char *username,
+ gnutls_datum_t * key)
+{
+ if (debug)
+ printf("psk: username %s\n", username);
+
+ if (strcmp(username, "test") != 0) {
+ fail("error in received username: '%s'\n", username);
+ }
+
+ key->data = gnutls_malloc(4);
+ assert(key->data != NULL);
+ key->data[0] = 0xDE;
+ key->data[1] = 0xAD;
+ key->data[2] = 0xBE;
+ key->data[3] = 0xEF;
+ key->size = 4;
+ return 0;
+}
+
+int err, ret;
+char topbuf[512];
+gnutls_session_t session;
+char buffer[MAX_BUF + 1];
+int optval = 1;
+
+static void server(int sd)
+{
+ gnutls_certificate_credentials_t serverx509cred;
+ gnutls_psk_server_credentials_t server_pskcred;
+
+ /* this must be called once in the program
+ */
+ global_init();
+ gnutls_global_set_log_function(tls_log_func);
+ if (debug)
+ gnutls_global_set_log_level(4711);
+
+ side = "server";
+
+ gnutls_psk_allocate_server_credentials(&server_pskcred);
+ gnutls_psk_set_server_credentials_function(server_pskcred,
+ psk_server_func);
+ gnutls_psk_set_server_credentials_hint(server_pskcred, "hint");
+ gnutls_certificate_allocate_credentials(&serverx509cred);
+ gnutls_certificate_set_x509_key_mem(serverx509cred,
+ &server_cert, &server_key,
+ GNUTLS_X509_FMT_PEM);
+
+ gnutls_init(&session, GNUTLS_SERVER);
+
+ /* avoid calling all the priority functions, since the defaults
+ * are adequate.
+ */
+ gnutls_priority_set_direct(session, "NORMAL:-KX-ALL:+RSA-PSK",
+ NULL);
+
+
+ gnutls_credentials_set(session, GNUTLS_CRD_PSK, server_pskcred);
+ gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
+ serverx509cred);
+
+ gnutls_handshake_set_timeout(session, 20 * 1000);
+ gnutls_transport_set_int(session, sd);
+ ret = gnutls_handshake(session);
+ if (ret < 0) {
+ close(sd);
+ gnutls_deinit(session);
+ fail("server: Handshake has failed (%s)\n\n",
+ gnutls_strerror(ret));
+ return;
+ }
+ if (debug)
+ success("server: Handshake was completed\n");
+
+ /* see the Getting peer's information example */
+ /* print_info(session); */
+
+ for (;;) {
+ memset(buffer, 0, MAX_BUF + 1);
+ ret = gnutls_record_recv(session, buffer, MAX_BUF);
+
+ if (ret == 0) {
+ if (debug)
+ success
+ ("server: Peer has closed the GnuTLS connection\n");
+ break;
+ } else if (ret < 0) {
+ fail("server: Received corrupted data(%d). Closing...\n", ret);
+ break;
+ } else if (ret > 0) {
+ /* echo data back to the client
+ */
+ gnutls_record_send(session, buffer,
+ strlen(buffer));
+ }
+ }
+ /* do not wait for the peer to close the connection.
+ */
+ gnutls_bye(session, GNUTLS_SHUT_WR);
+
+ close(sd);
+ gnutls_deinit(session);
+
+ gnutls_psk_free_server_credentials(server_pskcred);
+ gnutls_certificate_free_credentials(serverx509cred);
+
+ gnutls_global_deinit();
+
+ if (debug)
+ success("server: finished\n");
+}
+
+void doit(void)
+{
+ pid_t child;
+ int sockets[2];
+
+ err = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
+ if (err == -1) {
+ perror("socketpair");
+ fail("socketpair failed\n");
+ return;
+ }
+
+ child = fork();
+ if (child < 0) {
+ perror("fork");
+ fail("fork");
+ return;
+ }
+
+ if (child) {
+ int status;
+ /* parent */
+ server(sockets[0]);
+ wait(&status);
+ } else
+ client(sockets[1]);
+}
+
+#endif /* _WIN32 */
projects / thirdparty / gnutls.git / commitdiff
