1 files changed, 353 insertions, 0 deletions
diff --git a/tests/tls13/supported_versions.c b/tests/tls13/supported_versions.c
new file mode 100644
index 0000000..7d14eeb
--- /dev/null
+++ b/tests/tls13/supported_versions.c
@@ -0,0 +1,353 @@
+/*
+ * Copyright (C) 2017-2018 Red Hat, Inc.
+ *
+ * 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 Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#if defined(_WIN32)
+
+int main()
+{
+	exit(77);
+}
+
+#else
+
+#include <string.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <gnutls/gnutls.h>
+#include <gnutls/dtls.h>
+#include <signal.h>
+
+#include "cert-common.h"
+#include "utils.h"
+
+/* This program tests the ProtocolVersion of Client Hello
+ * and whether the supported_versions extension is present and
+ * contains 0x0304 (TLS 1.3).
+ */
+
+static void server_log_func(int level, const char *str)
+{
+	fprintf(stderr, "server|<%d>| %s", level, str);
+}
+
+static void client_log_func(int level, const char *str)
+{
+	fprintf(stderr, "client|<%d>| %s", level, str);
+}
+
+
+
+#define MAX_BUF 1024
+
+static void client(int fd)
+{
+	int ret;
+	gnutls_certificate_credentials_t x509_cred;
+	gnutls_session_t session;
+
+	global_init();
+
+	if (debug) {
+		gnutls_global_set_log_function(client_log_func);
+		gnutls_global_set_log_level(7);
+	}
+
+	gnutls_certificate_allocate_credentials(&x509_cred);
+
+	/* Initialize TLS session
+	 */
+	gnutls_init(&session, GNUTLS_CLIENT);
+
+	gnutls_handshake_set_timeout(session, get_timeout());
+
+	ret = gnutls_priority_set_direct(session, "NORMAL:-VERS-ALL:+VERS-TLS1.3:+VERS-TLS1.2:+VERS-TLS1.0", NULL);
+	if (ret < 0)
+		fail("cannot set TLS 1.3 priorities\n");
+
+	/* put the anonymous credentials to the current session
+	 */
+	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
+
+	gnutls_transport_set_int(session, fd);
+
+	/* Perform the TLS handshake
+	 */
+	do {
+		ret = gnutls_handshake(session);
+	}
+	while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+
+	close(fd);
+
+	gnutls_deinit(session);
+
+	gnutls_certificate_free_credentials(x509_cred);
+
+	gnutls_global_deinit();
+}
+
+static unsigned client_hello_ok = 0;
+static unsigned server_hello_ok = 0;
+
+#define HANDSHAKE_SESSION_ID_POS 34
+#define TLS_EXT_SUPPORTED_VERSIONS 43
+
+#define SKIP16(pos, total) { \
+	uint16_t _s; \
+	if (pos+2 > total) fail("error\n"); \
+	_s = (msg->data[pos] << 8) | msg->data[pos+1]; \
+	if ((size_t)(pos+2+_s) > total) fail("error\n"); \
+	pos += 2+_s; \
+	}
+
+#define SKIP8(pos, total) { \
+	uint8_t _s; \
+	if (pos+1 > total) fail("error\n"); \
+	_s = msg->data[pos]; \
+	if ((size_t)(pos+1+_s) > total) fail("error\n"); \
+	pos += 1+_s; \
+	}
+
+static int client_hello_callback(gnutls_session_t session, unsigned int htype,
+	unsigned post, unsigned int incoming, const gnutls_datum_t *msg)
+{
+	ssize_t pos;
+
+	if (htype == GNUTLS_HANDSHAKE_SERVER_HELLO && post == GNUTLS_HOOK_POST) {
+		/* check whether TLS 1.3 is negotiated */
+		pos = 0;
+		if (msg->size < 2) {
+			fail("error in server hello size\n");
+		}
+
+		success("server hello:\n\t%d.%d\n",
+			(int)msg->data[pos], (int)msg->data[pos+1]);
+
+		if (msg->data[pos] != 0x03 || msg->data[pos+1] != 0x03) {
+			fail("fail expected TLS 1.2 in server hello, got %d.%d\n", (int)msg->data[pos], (int)msg->data[pos+1]);
+		}
+
+		server_hello_ok = 1;
+		return GNUTLS_E_INTERRUPTED;
+	}
+
+	if (htype != GNUTLS_HANDSHAKE_CLIENT_HELLO || post != GNUTLS_HOOK_PRE)
+		return 0;
+
+	if (msg->size < HANDSHAKE_SESSION_ID_POS)
+		return -1;
+
+	/* we expect the legacy version to be present */
+	/* ProtocolVersion legacy_version = 0x0303 */
+	if (msg->data[0] != 0x03 || msg->data[1] != 0x03) {
+		fail("ProtocolVersion contains %d.%d\n", (int)msg->data[0], (int)msg->data[1]);
+	}
+
+	pos = HANDSHAKE_SESSION_ID_POS;
+	/* legacy_session_id */
+	SKIP8(pos, msg->size);
+
+	/* CipherSuites */
+	SKIP16(pos, msg->size);
+
+	/* legacy_compression_methods */
+	SKIP8(pos, msg->size);
+
+	pos += 2;
+
+	while (pos < msg->size) {
+		uint16_t type;
+
+		if (pos+4 > msg->size)
+			fail("invalid client hello\n");
+
+		type = (msg->data[pos] << 8) | msg->data[pos+1];
+		pos+=2;
+
+		success("Found extension %d\n", (int)type);
+
+		if (type != TLS_EXT_SUPPORTED_VERSIONS) {
+			SKIP16(pos, msg->size);
+		} else { /* found */
+			ssize_t size = (msg->data[pos] << 8) | msg->data[pos+1];
+			pos+=2;
+
+			size = msg->data[pos];
+
+			if (size > msg->size+pos) {
+				fail("error in extension length\n");
+			}
+
+			if (size % 2 == 1) {
+				fail("extension length is odd!\n");
+			}
+
+			if (size != 6) {
+				fail("expected three versions only (%d)!\n", (int)size);
+			}
+			pos++;
+
+			success("client hello:\n\t%d.%d\n\t%d.%d\n\t%d.%d\n",
+				(int)msg->data[pos], (int)msg->data[pos+1], 
+				(int)msg->data[pos+2], (int)msg->data[pos+3], 
+				(int)msg->data[pos+4], (int)msg->data[pos+5]);
+
+			if (msg->data[pos] != 0x03 || msg->data[pos+1] != 0x04) {
+				fail("fail expected TLS 1.3, got %d.%d\n", (int)msg->data[pos], (int)msg->data[pos+1]);
+			}
+			pos+=2;
+
+			if (msg->data[pos] != 0x03 || msg->data[pos+1] != 0x03) {
+				fail("fail expected TLS 1.2, got %d.%d\n", (int)msg->data[pos], (int)msg->data[pos+1]);
+			}
+			pos+=2;
+
+			if (msg->data[pos] != 0x03 || msg->data[pos+1] != 0x01) {
+				fail("fail expected TLS 1.0, got %d.%d\n", (int)msg->data[pos], (int)msg->data[pos+1]);
+			}
+			pos+=2;
+			client_hello_ok = 1;
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static void server(int fd)
+{
+	int ret;
+	char buffer[MAX_BUF + 1];
+	gnutls_session_t session;
+	gnutls_certificate_credentials_t x509_cred;
+
+	/* this must be called once in the program
+	 */
+	global_init();
+	memset(buffer, 0, sizeof(buffer));
+
+	if (debug) {
+		gnutls_global_set_log_function(server_log_func);
+		gnutls_global_set_log_level(4711);
+	}
+
+	gnutls_certificate_allocate_credentials(&x509_cred);
+	gnutls_certificate_set_x509_key_mem(x509_cred, &server_cert,
+					    &server_key,
+					    GNUTLS_X509_FMT_PEM);
+
+	gnutls_init(&session, GNUTLS_SERVER);
+
+	gnutls_handshake_set_timeout(session, get_timeout());
+	gnutls_handshake_set_hook_function(session, GNUTLS_HANDSHAKE_ANY,
+					   GNUTLS_HOOK_BOTH,
+					   client_hello_callback);
+
+	/* avoid calling all the priority functions, since the defaults
+	 * are adequate.
+	 */
+	gnutls_priority_set_direct(session, "NORMAL:+VERS-TLS1.3", NULL);
+
+	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
+
+	gnutls_transport_set_int(session, fd);
+
+	do {
+		ret = gnutls_handshake(session);
+		if (ret == GNUTLS_E_INTERRUPTED) { /* expected */
+			break;
+		}
+	} while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+
+
+	if (client_hello_ok == 0) {
+		fail("server: did not verify the client hello\n");
+	}
+
+	if (server_hello_ok == 0) {
+		fail("server: did not verify the server hello contents\n");
+	}
+
+	close(fd);
+	gnutls_deinit(session);
+
+	gnutls_certificate_free_credentials(x509_cred);
+
+	gnutls_global_deinit();
+
+	if (debug)
+		success("server: client/server hello were verified\n");
+}
+
+static void ch_handler(int sig)
+{
+	int status = 0;
+	wait(&status);
+	check_wait_status(status);
+	return;
+}
+
+void doit(void)
+{
+	int fd[2];
+	int ret;
+	pid_t child;
+
+	signal(SIGCHLD, ch_handler);
+	signal(SIGPIPE, SIG_IGN);
+
+	ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
+	if (ret < 0) {
+		perror("socketpair");
+		exit(1);
+	}
+
+	child = fork();
+	if (child < 0) {
+		perror("fork");
+		fail("fork");
+		exit(1);
+	}
+
+	if (child) {
+		/* parent */
+		close(fd[1]);
+		server(fd[0]);
+		kill(child, SIGTERM);
+	} else {
+		close(fd[0]);
+		client(fd[1]);
+		exit(0);
+	}
+}
+
+#endif				/* _WIN32 */