1 files changed, 360 insertions, 0 deletions
diff --git a/tests/tls13/change_cipher_spec.c b/tests/tls13/change_cipher_spec.c
new file mode 100644
index 0000000..81baa76
--- /dev/null
+++ b/tests/tls13/change_cipher_spec.c
@@ -0,0 +1,360 @@
+/*
+ * Copyright (C) 2017 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 <assert.h>
+#include <errno.h>
+
+#include "cert-common.h"
+#include "utils.h"
+
+/* This program tests whether the ChangeCipherSpec message
+ * is ignored during handshake.
+ */
+
+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);
+}
+
+static unsigned client_sent_ccs = 0;
+static unsigned server_sent_ccs = 0;
+
+static int cli_hsk_callback(gnutls_session_t session, unsigned int htype,
+	unsigned post, unsigned int incoming, const gnutls_datum_t *msg);
+
+static void client(int fd, unsigned ccs_check)
+{
+	int ret;
+	gnutls_certificate_credentials_t x509_cred;
+	gnutls_session_t session;
+	char buf[64];
+
+	global_init();
+	client_sent_ccs = 0;
+	server_sent_ccs = 0;
+
+	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_POST_HANDSHAKE_AUTH);
+
+	gnutls_session_set_ptr(session, &ccs_check);
+	gnutls_handshake_set_timeout(session, get_timeout());
+	if (ccs_check) {
+		gnutls_handshake_set_hook_function(session, GNUTLS_HANDSHAKE_ANY,
+						   GNUTLS_HOOK_PRE,
+						   cli_hsk_callback);
+	}
+
+	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");
+
+
+	gnutls_certificate_set_x509_key_mem(x509_cred, &cli_ca3_cert,
+					    &cli_ca3_key,
+					    GNUTLS_X509_FMT_PEM);
+
+	/* 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);
+
+	if (ret != 0)
+		fail("handshake failed: %s\n", gnutls_strerror(ret));
+	success("client handshake completed\n");
+
+	do {
+		ret = gnutls_record_recv(session, buf, sizeof(buf));
+	} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
+
+	if (ret < 0)
+		fail("client: recv did not succeed as expected: %s\n", gnutls_strerror(ret));
+
+	/* send change cipher spec, this should fail in the server */
+	do {
+		ret = send(fd, "\x14\x03\x03\x00\x01\x01", 6, 0);
+	} while(ret == -1 && (errno == EINTR || errno == EAGAIN));
+
+	close(fd);
+
+	gnutls_deinit(session);
+
+	if (ccs_check) {
+		if (client_sent_ccs != 1) {
+			fail("client: did not sent CCS\n");
+		}
+	}
+
+	gnutls_certificate_free_credentials(x509_cred);
+
+	gnutls_global_deinit();
+}
+
+static int cli_hsk_callback(gnutls_session_t session, unsigned int htype,
+	unsigned post, unsigned int incoming, const gnutls_datum_t *msg)
+{
+	unsigned *p;
+	unsigned ccs_check;
+	static unsigned hello_received = 0;
+
+	p = gnutls_session_get_ptr(session);
+	ccs_check = *p;
+
+	assert(ccs_check != 0);
+	assert(post == GNUTLS_HOOK_PRE);
+
+	if (htype == GNUTLS_HANDSHAKE_CLIENT_HELLO && !incoming) {
+		hello_received = 1;
+
+		gnutls_handshake_set_hook_function(session, GNUTLS_HANDSHAKE_CHANGE_CIPHER_SPEC,
+						   GNUTLS_HOOK_PRE,
+						   cli_hsk_callback);
+	}
+
+	if (htype == GNUTLS_HANDSHAKE_CHANGE_CIPHER_SPEC && !incoming && hello_received) {
+		client_sent_ccs++;
+		assert(msg->size == 1 && msg->data[0] == 0x01);
+	}
+
+
+	return 0;
+}
+
+static int hsk_callback(gnutls_session_t session, unsigned int htype,
+	unsigned post, unsigned int incoming, const gnutls_datum_t *msg)
+{
+	int ret;
+	int fd;
+	unsigned *p;
+	unsigned ccs_check;
+
+	p = gnutls_session_get_ptr(session);
+	ccs_check = *p;
+
+	assert(post == GNUTLS_HOOK_PRE);
+
+	if (!ccs_check) {
+		if (!incoming || htype == GNUTLS_HANDSHAKE_CLIENT_HELLO ||
+		    htype == GNUTLS_HANDSHAKE_FINISHED)
+			return 0;
+
+		fd = gnutls_transport_get_int(session);
+
+		/* send change cipher spec */
+		do {
+			ret = send(fd, "\x14\x03\x03\x00\x01\x01", 6, 0);
+		} while(ret == -1 && (errno == EINTR || errno == EAGAIN));
+	} else { /* checking whether server received it */
+		if (htype == GNUTLS_HANDSHAKE_CHANGE_CIPHER_SPEC && !incoming) {
+			server_sent_ccs++;
+			assert(msg->size == 1 && msg->data[0] == 0x01);
+		}
+	}
+	return 0;
+}
+
+static void server(int fd, unsigned ccs_check)
+{
+	int ret;
+	gnutls_session_t session;
+	gnutls_certificate_credentials_t x509_cred;
+	char buf[64];
+
+	/* this must be called once in the program
+	 */
+	global_init();
+
+	client_sent_ccs = 0;
+	server_sent_ccs = 0;
+
+	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());
+
+	if (ccs_check)
+		gnutls_handshake_set_hook_function(session, GNUTLS_HANDSHAKE_CHANGE_CIPHER_SPEC,
+						   GNUTLS_HOOK_PRE,
+						   hsk_callback);
+	else
+		gnutls_handshake_set_hook_function(session, GNUTLS_HANDSHAKE_ANY,
+						   GNUTLS_HOOK_PRE,
+						   hsk_callback);
+
+	/* avoid calling all the priority functions, since the defaults
+	 * are adequate.
+	 */
+	assert(gnutls_priority_set_direct(session, "NORMAL:+VERS-TLS1.3", NULL) >= 0);
+	gnutls_session_set_ptr(session, &ccs_check);
+
+	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
+
+	gnutls_transport_set_int(session, fd);
+
+	do {
+		ret = gnutls_handshake(session);
+	} while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+
+	if (ret != 0)
+		fail("handshake failed: %s\n", gnutls_strerror(ret));
+
+	success("server handshake completed\n");
+
+	gnutls_certificate_server_set_request(session, GNUTLS_CERT_REQUIRE);
+	/* ask peer for re-authentication */
+	do {
+		ret = gnutls_record_send(session, "\x00", 1);
+	} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
+
+	if (ret < 0)
+		fail("server: gnutls_record_send did not succeed as expected: %s\n", gnutls_strerror(ret));
+
+	/* receive CCS and fail */
+	do {
+		ret = gnutls_record_recv(session, buf, sizeof(buf));
+	} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
+
+	if (ret != GNUTLS_E_UNEXPECTED_PACKET)
+		fail("server: incorrect alert sent: %d != %d\n",
+		     ret, GNUTLS_E_UNEXPECTED_PACKET);
+
+	close(fd);
+	gnutls_deinit(session);
+
+	gnutls_certificate_free_credentials(x509_cred);
+
+	if (ccs_check) {
+		if (server_sent_ccs != 1) {
+			fail("server: did not sent CCS\n");
+		}
+	}
+
+	gnutls_global_deinit();
+
+	if (debug)
+		success("server: client/server hello were verified\n");
+}
+
+static void ch_handler(int sig)
+{
+	int status;
+	wait(&status);
+	check_wait_status(status);
+	return;
+}
+
+static
+void start(unsigned ccs_check)
+{
+	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], ccs_check);
+		kill(child, SIGTERM);
+	} else {
+		close(fd[0]);
+		client(fd[1], ccs_check);
+		exit(0);
+	}
+}
+
+void doit(void)
+{
+	start(0);
+	start(1);
+}
+
+#endif				/* _WIN32 */