tests: added test suite on key limits

This checks whether key update occurs for the expected ciphersuites.

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>

2 files changed, 342 insertions, 0 deletions

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 8440a29586..f69ef776ab 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -99,6 +99,8 @@ ctests = tls13/supported_versions tls13/tls12-no-tls13-exts \
 
 ctests += tls13/key_update
 
+ctests += tls13/key_limits
+
 ctests += mini-record-2 simple gc set_pkcs12_cred cert certuniqueid tls-neg-ext-key \
 	 mpi certificate_set_x509_crl dn parse_ca x509-dn x509-dn-decode record-sizes \
 	 hostname-check cve-2008-4989 pkcs12_s2k chainverify record-sizes-range \
diff --git a/tests/tls13/key_limits.c b/tests/tls13/key_limits.c
new file mode 100644
index 0000000000..078ee9e804
--- /dev/null
+++ b/tests/tls13/key_limits.c
@@ -0,0 +1,340 @@
+/*
+ * Copyright (C) 2012 Free Software Foundation, Inc.
+ * 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 <http://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 <assert.h>
+#include <signal.h>
+
+#include "utils.h"
+#include "cert-common.h"
+
+static void terminate(void);
+
+/* This program tests whether re-key occurs at the expected
+ * time.
+ */
+
+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, const char *prio, unsigned expect_update)
+{
+	int ret;
+	char buffer[MAX_BUF + 1];
+	gnutls_certificate_credentials_t x509_cred;
+	gnutls_session_t session;
+	unsigned char seq[8];
+	unsigned update_happened = 0;
+
+	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);
+
+	/* Use default priorities */
+	ret = gnutls_priority_set_direct(session, prio, NULL);
+	if (ret < 0) {
+		fail("error in priority '%s': %s\n", prio, gnutls_strerror(ret));
+		exit(1);
+	}
+
+	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("client: Handshake failed\n");
+		gnutls_perror(ret);
+		exit(1);
+	} else {
+		if (debug)
+			success("client: Handshake was completed\n");
+	}
+
+	if (debug)
+		success("client: TLS version is: %s\n",
+			gnutls_protocol_get_name
+			(gnutls_protocol_get_version(session)));
+
+	/* make sure we are not blocked forever */
+	gnutls_record_set_timeout(session, 10000);
+
+	assert(gnutls_record_get_state(session, 1, NULL, NULL, NULL, seq) >= 0);
+	assert(gnutls_record_set_state(session, 1, (void*)"\x00\x00\x00\x00\x00\xff\xff\xfa") >= 0);
+
+	do {
+		do {
+			ret = gnutls_record_recv_seq(session, buffer, MAX_BUF, seq);
+		} while (ret == GNUTLS_E_AGAIN
+			 || ret == GNUTLS_E_INTERRUPTED);
+
+		if (memcmp(seq, "\x00\x00\x00\x00\x00\x00\x00\x01", 8) == 0) {
+			update_happened = 1;
+		}
+	} while (ret > 0);
+
+	if (ret == 0 || ret == GNUTLS_E_TIMEDOUT) {
+		if (debug)
+			success
+			    ("client: Peer has closed the TLS connection\n");
+		goto end;
+	} else if (ret < 0) {
+		if (ret != 0) {
+			fail("client: Error: %s\n", gnutls_strerror(ret));
+			exit(1);
+		}
+	}
+
+	gnutls_bye(session, GNUTLS_SHUT_WR);
+
+      end:
+
+	close(fd);
+
+	gnutls_deinit(session);
+
+	gnutls_certificate_free_credentials(x509_cred);
+
+	gnutls_global_deinit();
+
+	if (expect_update && update_happened == 0) {
+		fail("no update occurred!\n");
+		exit(1);
+	} else if (!expect_update && update_happened) {
+		fail("update occurred unexpectedly!\n");
+		exit(1);
+	} else {
+		if (debug)
+			success("detected update!\n");
+	}
+}
+
+
+/* These are global */
+pid_t child;
+
+static void terminate(void)
+{
+	kill(child, SIGTERM);
+	exit(1);
+}
+
+static void server(int fd, const char *prio)
+{
+	int ret;
+	char buffer[MAX_BUF + 1];
+	gnutls_session_t session;
+	gnutls_certificate_credentials_t x509_cred;
+	unsigned i;
+	unsigned char seq[8];
+
+	/* 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);
+
+	/* avoid calling all the priority functions, since the defaults
+	 * are adequate.
+	 */
+	ret = gnutls_priority_set_direct(session, prio, NULL);
+	if (ret < 0) {
+		fail("error in priority '%s': %s\n", prio, gnutls_strerror(ret));
+		exit(1);
+	}
+
+	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) {
+		close(fd);
+		gnutls_deinit(session);
+		fail("server: Handshake has failed (%s)\n\n",
+		     gnutls_strerror(ret));
+		terminate();
+	}
+	if (debug)
+		success("server: Handshake was completed\n");
+
+	if (debug)
+		success("server: TLS version is: %s\n",
+			gnutls_protocol_get_name
+			(gnutls_protocol_get_version(session)));
+
+	assert(gnutls_record_get_state(session, 0, NULL, NULL, NULL, seq) >= 0);
+	assert(gnutls_record_set_state(session, 0, (void*)"\x00\x00\x00\x00\x00\xff\xff\xfa") >= 0);
+
+	memset(buffer, 1, sizeof(buffer));
+	for (i = 0; i<32; i++) {
+		usleep(10000); /* some systems like FreeBSD have their buffers full during this send */
+		do {
+			ret =
+			    gnutls_record_send(session, buffer,
+						sizeof(buffer));
+		} while (ret == GNUTLS_E_AGAIN
+			 || ret == GNUTLS_E_INTERRUPTED);
+
+		if (ret < 0) {
+			fail("Error sending %d byte packet: %s\n", (int)sizeof(buffer),
+			     gnutls_strerror(ret));
+			terminate();
+		}
+
+		if (ret != sizeof(buffer)) {
+			fail("Error sending %d byte packet: sent: %d\n", (int)sizeof(buffer),
+			     ret);
+			terminate();
+		}
+	}
+
+
+	/* wait for the peer to close the connection.
+	 */
+	gnutls_bye(session, GNUTLS_SHUT_WR);
+
+	close(fd);
+	gnutls_deinit(session);
+
+	gnutls_certificate_free_credentials(x509_cred);
+
+	gnutls_global_deinit();
+
+	if (debug)
+		success("server: finished\n");
+}
+
+static void start(const char *name, const char *prio, unsigned exp_update)
+{
+	int fd[2];
+	int ret, status = 0;
+
+	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 */
+		success("trying: %s\n", name);
+		close(fd[0]);
+		server(fd[1], prio);
+		wait(&status);
+		check_wait_status(status);
+	} else {
+		close(fd[1]);
+		client(fd[0], prio, exp_update);
+		exit(0);
+	}
+}
+
+#define AES_GCM "NORMAL:-VERS-ALL:+VERS-TLS1.3:-CIPHER-ALL:+AES-128-GCM"
+#define CHACHA_POLY1305 "NORMAL:-VERS-ALL:+VERS-TLS1.3:-CIPHER-ALL:+CHACHA20-POLY1305"
+
+static void ch_handler(int sig)
+{
+	return;
+}
+
+void doit(void)
+{
+	signal(SIGCHLD, ch_handler);
+	signal(SIGPIPE, SIG_IGN);
+
+	start("aes-gcm", AES_GCM, 1);
+	if (!gnutls_fips140_mode_enabled()) {
+		start("chacha20", CHACHA_POLY1305, 0);
+	}
+}
+
+#endif				/* _WIN32 */