tests: add tests for early data

Signed-off-by: Daiki Ueno <dueno@redhat.com>

3 files changed, 327 insertions, 1 deletions

diff --git a/.gitignore b/.gitignore
index 3fc64789dd..d4a06fe3f7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -764,6 +764,7 @@ tests/tls13-cert-key-exchange
 tests/tls13/change_cipher_spec
 tests/tls13-cipher-neg
 tests/tls13/cookie
+tests/tls13-early-data
 tests/tls13-early-start
 tests/tls13/hello_random_value
 tests/tls13/hello_retry_request
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 9b7de3c512..6a13ffbebb 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -397,7 +397,7 @@ endif
 if HAVE_FORK
 ctests += x509self x509dn anonself pskself dhepskself	\
 	setcredcrash tls12-resume-x509 tls12-resume-psk tls12-resume-anon \
-	tls13-resume-x509 tls13-resume-psk
+	tls13-resume-x509 tls13-resume-psk tls13-early-data
 endif
 
 gc_CPPFLAGS = $(AM_CPPFLAGS) \
diff --git a/tests/tls13-early-data.c b/tests/tls13-early-data.c
new file mode 100644
index 0000000000..1189eb10c1
--- /dev/null
+++ b/tests/tls13-early-data.c
@@ -0,0 +1,325 @@
+/*
+ * Copyright (C) 2012-2018 Free Software Foundation, Inc.
+ *
+ * Author: Nikos Mavrogiannopoulos, Daiki Ueno
+ *
+ * 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(void)
+{
+	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 "cert-common.h"
+#include "utils.h"
+
+/* This program tests the robustness of record sending with padding.
+ */
+
+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);
+}
+
+
+/* A very basic TLS client.
+ */
+
+#define SESSIONS 3
+#define MAX_BUF 1024
+#define MSG "Hello TLS"
+#define EARLY_MSG "Hello TLS, it's early"
+#define PRIORITY "NORMAL:-VERS-ALL:+VERS-TLS1.3"
+
+static void client(int sds[])
+{
+	int ret;
+	char buffer[MAX_BUF + 1];
+	gnutls_certificate_credentials_t x509_cred;
+	gnutls_session_t session;
+	int t;
+	gnutls_datum_t session_data = {NULL, 0};
+
+	if (debug) {
+		gnutls_global_set_log_function(client_log_func);
+		gnutls_global_set_log_level(7);
+	}
+
+	gnutls_certificate_allocate_credentials(&x509_cred);
+
+	for (t = 0; t < SESSIONS; t++) {
+		int sd = sds[t];
+
+		assert(gnutls_init(&session, GNUTLS_CLIENT)>=0);
+		assert(gnutls_priority_set_direct(session, PRIORITY, NULL)>=0);
+
+		gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
+
+		gnutls_transport_set_int(session, sd);
+
+		if (t > 0) {
+			assert(gnutls_session_set_data(session, session_data.data, session_data.size) >= 0);
+			assert(gnutls_record_send_early_data(session, EARLY_MSG, sizeof(EARLY_MSG)) >= 0);
+		}
+
+		/* Perform the TLS handshake
+		 */
+		gnutls_handshake_set_timeout(session, 20 * 1000);
+		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 (t == 0) {
+			/* get the session data size */
+			ret =
+			    gnutls_session_get_data2(session,
+						     &session_data);
+			if (ret < 0)
+				fail("client: Getting resume data failed\n");
+		}
+
+		if (t == 1) {
+			if (!gnutls_session_is_resumed(session)) {
+				fail("client: session_is_resumed error (%d)\n", t);
+			}
+		}
+
+		gnutls_record_send(session, MSG, strlen(MSG));
+
+		do {
+			ret = gnutls_record_recv(session, buffer, sizeof(buffer));
+		} while (ret == GNUTLS_E_AGAIN);
+		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;
+		}
+
+		gnutls_bye(session, GNUTLS_SHUT_WR);
+
+		close(sd);
+
+		gnutls_deinit(session);
+	}
+
+ end:
+	gnutls_free(session_data.data);
+	gnutls_certificate_free_credentials(x509_cred);
+}
+
+
+static pid_t child;
+
+static void server(int sds[])
+{
+	int ret;
+	char buffer[MAX_BUF + 1];
+	gnutls_session_t session;
+	gnutls_certificate_credentials_t x509_cred;
+	gnutls_datum_t session_ticket_key = { NULL, 0 };
+	int t;
+
+	/* 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_session_ticket_key_generate(&session_ticket_key);
+
+	for (t = 0; t < SESSIONS; t++) {
+		int sd = sds[t];
+
+		assert(gnutls_init(&session, GNUTLS_SERVER|GNUTLS_ENABLE_EARLY_DATA)>=0);
+
+		assert(gnutls_priority_set_direct(session, PRIORITY, NULL)>=0);
+
+		gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
+
+		gnutls_session_ticket_enable_server(session,
+						    &session_ticket_key);
+
+		gnutls_transport_set_int(session, sd);
+
+		do {
+			ret = gnutls_handshake(session);
+		}
+		while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+		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 (t == 1) {
+			if (!gnutls_session_is_resumed(session)) {
+				fail("server: session_is_resumed error (%d)\n", t);
+			}
+
+			if (!(gnutls_session_get_flags(session) & GNUTLS_SFLAGS_EARLY_DATA)) {
+				fail("server: early data is not received (%d)\n", t);
+			}
+
+			ret = gnutls_record_recv_early_data(session, buffer, sizeof(buffer));
+			if (ret < 0) {
+				fail("server: failed to retrieve early data: %s\n",
+				     gnutls_strerror(ret));
+			}
+
+			if (ret != sizeof(EARLY_MSG) || memcmp(buffer, EARLY_MSG, ret))
+				fail("server: early data mismatch\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) {
+				kill(child, SIGTERM);
+				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_free(session_ticket_key.data);
+
+	gnutls_certificate_free_credentials(x509_cred);
+
+	if (debug)
+		success("server: finished\n");
+}
+
+void doit(void)
+{
+	int client_sds[SESSIONS], server_sds[SESSIONS];
+	int i;
+	int ret;
+
+	signal(SIGCHLD, SIG_IGN);
+	signal(SIGPIPE, SIG_IGN);
+
+	for (i = 0; i < SESSIONS; i++) {
+		int sockets[2];
+
+		ret = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
+		if (ret < 0) {
+			perror("socketpair");
+			exit(1);
+		}
+
+		server_sds[i] = sockets[0];
+		client_sds[i] = sockets[1];
+	}
+
+	child = fork();
+	if (child < 0) {
+		perror("fork");
+		fail("fork");
+		exit(1);
+	}
+
+	if (child) {
+		/* parent */
+		for (i = 0; i < SESSIONS; i++)
+			close(client_sds[i]);
+		server(server_sds);
+		kill(child, SIGTERM);
+	} else {
+		for (i = 0; i < SESSIONS; i++)
+			close(server_sds[i]);
+		client(client_sds);
+		exit(0);
+	}
+}
+
+#endif				/* _WIN32 */