tests: added check for Encrypt-then-MAC under DTLS

2 files changed, 346 insertions, 1 deletions

diff --git a/tests/Makefile.am b/tests/Makefile.am
index ad7ee97543..6cf4a2dab2 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -88,7 +88,7 @@ ctests = mini-record-2 simple gc set_pkcs12_cred certder certuniqueid	\
 	 mini-dtls-fork mini-dtls-pthread mini-key-material x509cert-invalid \
 	 strict-der tls-ext-register tls-supplemental mini-dtls0-9 \
 	 mini-record-retvals mini-server-name tls-etm x509-cert-callback \
-	 sign-md5-rep keygen mini-tls-nonblock no-signal pkcs7-gen \
+	 sign-md5-rep keygen mini-tls-nonblock no-signal pkcs7-gen dtls-etm \
 	 x509sign-verify2 mini-alignment oids atfork prf psk-file \
 	 status-request status-request-ok status-request-missing \
 	 fallback-scsv pkcs8-key-decode urls dtls-rehandshake-cert \
diff --git a/tests/dtls-etm.c b/tests/dtls-etm.c
new file mode 100644
index 0000000000..765bc1fb19
--- /dev/null
+++ b/tests/dtls-etm.c
@@ -0,0 +1,345 @@
+/*
+ * Copyright (C) 2015 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 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
+ */
+
+#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 "utils.h"
+#include "cert-common.h"
+
+static void terminate(void);
+
+/* This program tests whether EtM is negotiated as expected.
+ */
+
+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, with anonymous authentication.
+ */
+
+#define MAX_BUF 1024
+
+static void client(int fd, const char *prio, unsigned etm)
+{
+	int ret;
+	char buffer[MAX_BUF + 1];
+	gnutls_anon_client_credentials_t anoncred;
+	gnutls_certificate_credentials_t x509_cred;
+	gnutls_session_t session;
+	/* Need to enable anonymous KX specifically. */
+
+	global_init();
+
+	if (debug) {
+		gnutls_global_set_log_function(client_log_func);
+		gnutls_global_set_log_level(7);
+	}
+
+	gnutls_anon_allocate_client_credentials(&anoncred);
+	gnutls_certificate_allocate_credentials(&x509_cred);
+
+	/* Initialize TLS session
+	 */
+	gnutls_init(&session, GNUTLS_CLIENT|GNUTLS_DATAGRAM);
+
+	/* Use default priorities */
+	assert(gnutls_priority_set_direct(session, prio, NULL)>=0);
+
+	/* put the anonymous credentials to the current session
+	 */
+	gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
+	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)));
+
+	if (etm != 0 && gnutls_session_etm_status(session) == 0) {
+		fail("client: EtM was not negotiated with %s!\n", prio);
+		exit(1);
+	} else if (etm == 0 && gnutls_session_etm_status(session) != 0) {
+		fail("client: EtM was negotiated with %s!\n", prio);
+		exit(1);
+	}
+
+	if (etm != 0 && ((gnutls_session_get_flags(session) & GNUTLS_SFLAGS_ETM) == 0)) {
+		fail("client: EtM was not negotiated with %s!\n", prio);
+		exit(1);
+	} else if (etm == 0 && ((gnutls_session_get_flags(session) & GNUTLS_SFLAGS_ETM) != 0)) {
+		fail("client: EtM was negotiated with %s!\n", prio);
+		exit(1);
+	}
+
+	do {
+		do {
+			ret = gnutls_record_recv(session, buffer, MAX_BUF);
+		} while (ret == GNUTLS_E_AGAIN
+			 || ret == GNUTLS_E_INTERRUPTED);
+	} while (ret > 0);
+
+	if (ret == 0) {
+		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_anon_free_client_credentials(anoncred);
+	gnutls_certificate_free_credentials(x509_cred);
+
+	gnutls_global_deinit();
+}
+
+
+/* These are global */
+pid_t child;
+
+static void terminate(void)
+{
+	kill(child, SIGTERM);
+	exit(1);
+}
+
+static void server(int fd, const char *prio, unsigned etm)
+{
+	int ret;
+	char buffer[MAX_BUF + 1];
+	gnutls_session_t session;
+	gnutls_anon_server_credentials_t anoncred;
+	gnutls_certificate_credentials_t x509_cred;
+	unsigned to_send = sizeof(buffer)/4;
+
+	/* 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_anon_allocate_server_credentials(&anoncred);
+
+	gnutls_init(&session, GNUTLS_SERVER|GNUTLS_DATAGRAM);
+
+	/* avoid calling all the priority functions, since the defaults
+	 * are adequate.
+	 */
+	assert(gnutls_priority_set_direct(session, prio, NULL) >= 0);
+
+	gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
+	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 (etm != 0 && gnutls_session_etm_status(session) == 0) {
+		fail("server: EtM was not negotiated with %s!\n", prio);
+		exit(1);
+	} else if (etm == 0 && gnutls_session_etm_status(session) != 0) {
+		fail("server: EtM was negotiated with %s!\n", prio);
+		exit(1);
+	}
+
+	if (etm != 0 && ((gnutls_session_get_flags(session) & GNUTLS_SFLAGS_ETM) == 0)) {
+		fail("server: EtM was not negotiated with %s!\n", prio);
+		exit(1);
+	} else if (etm == 0 && ((gnutls_session_get_flags(session) & GNUTLS_SFLAGS_ETM) != 0)) {
+		fail("server: EtM was negotiated with %s!\n", prio);
+		exit(1);
+	}
+
+	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)));
+
+	do {
+		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", to_send,
+			     gnutls_strerror(ret));
+			terminate();
+		}
+		to_send++;
+	}
+	while (to_send < 64);
+
+	to_send = -1;
+	/* do not wait for the peer to close the connection.
+	 */
+	gnutls_bye(session, GNUTLS_SHUT_WR);
+
+	close(fd);
+	gnutls_deinit(session);
+
+	gnutls_anon_free_server_credentials(anoncred);
+	gnutls_certificate_free_credentials(x509_cred);
+
+	gnutls_global_deinit();
+
+	if (debug)
+		success("server: finished\n");
+}
+
+static void start(const char *prio, unsigned etm)
+{
+	int fd[2];
+	int ret;
+
+	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], prio, etm);
+		kill(child, SIGTERM);
+	} else {
+		close(fd[0]);
+		client(fd[1], prio, etm);
+		exit(0);
+	}
+}
+
+#define AES_CBC "NONE:+VERS-DTLS1.0:-CIPHER-ALL:+AES-128-CBC:+SHA1:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL"
+#define AES_CBC_SHA256 "NONE:+VERS-DTLS1.2:-CIPHER-ALL:+RSA:+AES-128-CBC:+AES-256-CBC:+SHA256:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL"
+#define AES_GCM "NONE:+VERS-DTLS1.2:-CIPHER-ALL:+RSA:+AES-128-GCM:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL"
+
+static void ch_handler(int sig)
+{
+	int status;
+	wait(&status);
+	check_wait_status(status);
+	return;
+}
+
+void doit(void)
+{
+	signal(SIGCHLD, ch_handler);
+
+	start(AES_CBC, 1);
+	start(AES_CBC_SHA256, 1);
+	start(AES_GCM, 0);
+}
+
+#endif				/* _WIN32 */