1 files changed, 347 insertions, 0 deletions
diff --git a/tests/pskself2.c b/tests/pskself2.c
new file mode 100644
index 0000000..81286a0
--- /dev/null
+++ b/tests/pskself2.c
@@ -0,0 +1,347 @@
+/*
+ * Copyright (C) 2004-2012 Free Software Foundation, Inc.
+ * Copyright (C) 2013 Adam Sampson <ats@offog.org>
+ * Copyright (C) 2019 Free Software Foundation, Inc.
+ *
+ * Author: Simon Josefsson, Ander Juaristi
+ *
+ * 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 pskself.c. */
+
+#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>
+#if !defined(_WIN32)
+#include <sys/wait.h>
+#endif
+#include <unistd.h>
+#include <gnutls/gnutls.h>
+
+#include "utils.h"
+#include "extras/hex.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);
+}
+
+#define MAX_BUF 1024
+#define MSG "Hello TLS"
+
+static void client(int sd, const char *prio, unsigned exp_hint)
+{
+	int ret, ii;
+	gnutls_session_t session;
+	char buffer[MAX_BUF + 1];
+	gnutls_psk_client_credentials_t pskcred;
+	/* Need to enable anonymous KX specifically. */
+	const gnutls_datum_t key = { (void *) "DEADBEEF", 8 };
+	gnutls_datum_t user;
+	const char *hint;
+
+	global_init();
+	gnutls_global_set_log_function(tls_log_func);
+	if (debug)
+		gnutls_global_set_log_level(4711);
+
+	side = "client";
+
+	user.data = gnutls_malloc(4);
+	user.data[0] = 0xCA;
+	user.data[1] = 0xFE;
+	user.data[2] = 0xCA;
+	user.data[3] = 0xFE;
+	user.size = 4;
+
+	gnutls_psk_allocate_client_credentials(&pskcred);
+	ret = gnutls_psk_set_client_credentials2(pskcred, &user, &key,
+					  GNUTLS_PSK_KEY_HEX);
+	if (ret < 0) {
+		fail("client: Could not set PSK\n");
+		gnutls_perror(ret);
+		goto end;
+	}
+
+	/* Initialize TLS session
+	 */
+	gnutls_init(&session, GNUTLS_CLIENT);
+
+	/* Use default priorities */
+	gnutls_priority_set_direct(session, prio, NULL);
+
+	/* put the anonymous credentials to the current session
+	 */
+	gnutls_credentials_set(session, GNUTLS_CRD_PSK, pskcred);
+
+	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");
+	}
+
+	/* check the hint */
+	if (exp_hint) {
+		hint = gnutls_psk_client_get_hint(session);
+		if (hint == NULL || strcmp(hint, "hint") != 0) {
+			fail("client: hint is not the expected: %s\n", gnutls_psk_client_get_hint(session));
+			goto end;
+		}
+	}
+
+	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_free(user.data);
+	gnutls_psk_free_client_credentials(pskcred);
+
+	gnutls_global_deinit();
+}
+
+/* This is a sample TLS 1.0 echo server, for PSK authentication.
+ */
+
+#define MAX_BUF 1024
+
+/* These are global */
+
+static int
+pskfunc(gnutls_session_t session, const gnutls_datum_t *username,
+	gnutls_datum_t * key)
+{
+	if (debug)
+		printf("psk: Got username with length %d\n", username->size);
+
+	key->data = gnutls_malloc(4);
+	key->data[0] = 0xDE;
+	key->data[1] = 0xAD;
+	key->data[2] = 0xBE;
+	key->data[3] = 0xEF;
+	key->size = 4;
+
+	return 0;
+}
+
+
+static void server(int sd, const char *prio)
+{
+	gnutls_psk_server_credentials_t server_pskcred;
+	int ret;
+	gnutls_session_t session;
+	gnutls_datum_t psk_username;
+	char buffer[MAX_BUF + 1], expected_psk_username[] = { 0xDE, 0xAD, 0xBE, 0xEF };
+
+	/* 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_hint(server_pskcred, "hint");
+	gnutls_psk_set_server_credentials_function2(server_pskcred, pskfunc);
+
+	gnutls_init(&session, GNUTLS_SERVER);
+
+	/* avoid calling all the priority functions, since the defaults
+	 * are adequate.
+	 */
+	gnutls_priority_set_direct(session, prio, NULL);
+
+	gnutls_credentials_set(session, GNUTLS_CRD_PSK, server_pskcred);
+
+	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");
+
+		if (gnutls_psk_server_get_username(session))
+			fail("server: gnutls_psk_server_get_username() should have returned NULL\n");
+		if (gnutls_psk_server_get_username2(session, &psk_username) < 0)
+			fail("server: Could not get PSK username\n");
+
+		if (psk_username.size != 4 || memcmp(psk_username.data, expected_psk_username, 4))
+			fail("server: Unexpected PSK username\n");
+
+		success("server: PSK username length: %d\n", psk_username.size);
+	}
+
+	/* see the Getting peer's information example */
+	/* print_info(session); */
+
+	for (;;) {
+		memset(buffer, 0, MAX_BUF + 1);
+		gnutls_record_set_timeout(session, 10000);
+		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_global_deinit();
+
+	if (debug)
+		success("server: finished\n");
+}
+
+static
+void run_test(const char *prio, unsigned exp_hint)
+{
+	pid_t child;
+	int err;
+	int sockets[2];
+
+	success("trying with %s\n", prio);
+
+	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 */
+		close(sockets[1]);
+		server(sockets[0], prio);
+		wait(&status);
+		check_wait_status(status);
+	} else {
+		close(sockets[0]);
+		client(sockets[1], prio, exp_hint);
+		exit(0);
+	}
+}
+
+void doit(void)
+{
+	run_test("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+PSK", 1);
+	run_test("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+ECDHE-PSK", 1);
+	run_test("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+DHE-PSK", 1);
+
+	run_test("NORMAL:-VERS-ALL:+VERS-TLS1.2:+PSK", 0);
+	run_test("NORMAL:-VERS-ALL:+VERS-TLS1.2:-GROUP-ALL:+GROUP-FFDHE2048:+DHE-PSK", 0);
+	run_test("NORMAL:-VERS-ALL:+VERS-TLS1.2:-GROUP-ALL:+GROUP-SECP256R1:+ECDHE-PSK", 0);
+	run_test("NORMAL:-VERS-ALL:+VERS-TLS1.3:+PSK", 0);
+	run_test("NORMAL:-VERS-ALL:+VERS-TLS1.3:-GROUP-ALL:+GROUP-FFDHE2048:+DHE-PSK", 0);
+	run_test("NORMAL:-VERS-ALL:+VERS-TLS1.3:-GROUP-ALL:+GROUP-SECP256R1:+ECDHE-PSK", 0);
+	/* the following should work once we support PSK without DH */
+	run_test("NORMAL:-VERS-ALL:+VERS-TLS1.3:-GROUP-ALL:+PSK", 0);
+
+	run_test("NORMAL:-KX-ALL:+PSK", 0);
+	run_test("NORMAL:-KX-ALL:+ECDHE-PSK", 0);
+	run_test("NORMAL:-KX-ALL:+DHE-PSK", 0);
+}
+
+#endif				/* _WIN32 */