tests: add post-handshake auth test using PKCS#11 tokentmp-client-auth-decline

This adds a test that exercise the client's auth rejection logic,
using the RSA-PSS disabled PKCS #11 token.

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

3 files changed, 468 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
index aff3df9bcf..8953088ca4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -824,6 +824,7 @@ tests/tls13/no-psk-exts
 tests/tls13/ocsp-client
 tests/tls13/post-handshake-with-cert
 tests/tls13/post-handshake-with-cert-auto
+tests/tls13/post-handshake-with-cert-pkcs11
 tests/tls13/post-handshake-with-cert-ticket
 tests/tls13/post-handshake-with-psk
 tests/tls13/post-handshake-without-cert
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 37e33c0efe..96e10bfc5b 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -450,6 +450,14 @@ tls13_anti_replay_CPPFLAGS = $(AM_CPPFLAGS) \
 	-I$(top_builddir)/gl	\
 	$(NETTLE_CFLAGS)
 
+if ENABLE_PKCS11
+if !WINDOWS
+ctests += tls13/post-handshake-with-cert-pkcs11
+tls13_post_handshake_with_cert_pkcs11_DEPENDENCIES = libpkcs11mock2.la libutils.la
+tls13_post_handshake_with_cert_pkcs11_LDADD = $(LDADD) $(LIBDL)
+endif
+endif
+
 dist_check_SCRIPTS = rfc2253-escape-test rsa-md5-collision/rsa-md5-collision.sh systemkey.sh
 
 if !WINDOWS
diff --git a/tests/tls13/post-handshake-with-cert-pkcs11.c b/tests/tls13/post-handshake-with-cert-pkcs11.c
new file mode 100644
index 0000000000..ca78ade689
--- /dev/null
+++ b/tests/tls13/post-handshake-with-cert-pkcs11.c
@@ -0,0 +1,459 @@
+/*
+ * Copyright (C) 2017-2019 Red Hat, Inc.
+ *
+ * Author: 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 <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 "cert-common.h"
+#include "tls13/ext-parse.h"
+#include "pkcs11/softhsm.h"
+#include "utils.h"
+
+/* This program tests whether the Post Handshake Auth extension is
+ * present in the client hello, and whether it is missing from server
+ * hello. In addition it contains basic functionality test for
+ * post handshake authentication.
+ */
+
+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
+
+#define P11LIB "libpkcs11mock2.so"
+
+#define PIN "1234"
+
+#define CONFIG_NAME "softhsm-post-handshake-with-cert-pkcs11"
+#define CONFIG CONFIG_NAME".config"
+
+static
+int pin_func(void *userdata, int attempt, const char *url, const char *label,
+	     unsigned flags, char *pin, size_t pin_max)
+{
+	if (attempt == 0) {
+		strcpy(pin, PIN);
+		return 0;
+	}
+	return -1;
+}
+
+static void client(int fd, int err)
+{
+	int ret;
+	gnutls_certificate_credentials_t x509_cred;
+	gnutls_session_t session;
+	gnutls_x509_crt_t crt;
+	gnutls_x509_privkey_t key;
+	gnutls_datum_t tmp;
+	const char *lib;
+	char buffer[MAX_BUF + 1];
+
+	global_init();
+
+	if (debug) {
+		gnutls_global_set_log_function(client_log_func);
+		gnutls_global_set_log_level(7);
+	}
+
+	/* point to SoftHSM token that libpkcs11mock2.so internally uses */
+	setenv(SOFTHSM_ENV, CONFIG, 1);
+
+	gnutls_pkcs11_set_pin_function(pin_func, NULL);
+
+	lib = getenv("P11MOCKLIB2");
+	if (lib == NULL)
+		lib = P11LIB;
+
+	ret = gnutls_pkcs11_init(GNUTLS_PKCS11_FLAG_MANUAL, NULL);
+	if (ret != 0) {
+		fail("%d: %s\n", ret, gnutls_strerror(ret));
+		exit(1);
+	}
+
+	ret = gnutls_pkcs11_add_provider(lib, NULL);
+	if (ret != 0) {
+		fail("%d: %s\n", ret, gnutls_strerror(ret));
+		exit(1);
+	}
+
+	ret = gnutls_x509_crt_init(&crt);
+	if (ret < 0) {
+		fprintf(stderr,
+			"gnutls_x509_crt_init: %s\n", gnutls_strerror(ret));
+		exit(1);
+	}
+
+	ret = gnutls_x509_crt_import(crt, &cli_ca3_cert, GNUTLS_X509_FMT_PEM);
+	if (ret < 0) {
+		fprintf(stderr,
+			"gnutls_x509_crt_import: %s\n", gnutls_strerror(ret));
+		exit(1);
+	}
+
+	if (debug) {
+		gnutls_x509_crt_print(crt, GNUTLS_CRT_PRINT_ONELINE, &tmp);
+
+		printf("\tCertificate: %.*s\n", tmp.size, tmp.data);
+		gnutls_free(tmp.data);
+	}
+
+	ret = gnutls_x509_privkey_init(&key);
+	if (ret < 0) {
+		fprintf(stderr,
+			"gnutls_x509_privkey_init: %s\n", gnutls_strerror(ret));
+		exit(1);
+	}
+
+	ret = gnutls_x509_privkey_import(key, &cli_ca3_key, GNUTLS_X509_FMT_PEM);
+	if (ret < 0) {
+		fprintf(stderr,
+			"gnutls_x509_privkey_import: %s\n",
+			gnutls_strerror(ret));
+		exit(1);
+	}
+
+	/* initialize softhsm token */
+	ret = gnutls_pkcs11_token_init(SOFTHSM_URL, PIN, "test");
+	if (ret < 0) {
+		fail("gnutls_pkcs11_token_init: %s\n", gnutls_strerror(ret));
+		exit(1);
+	}
+
+	ret =
+	    gnutls_pkcs11_token_set_pin(SOFTHSM_URL, NULL, PIN,
+					GNUTLS_PIN_USER);
+	if (ret < 0) {
+		fail("gnutls_pkcs11_token_set_pin: %s\n", gnutls_strerror(ret));
+		exit(1);
+	}
+
+	ret = gnutls_pkcs11_copy_x509_crt(SOFTHSM_URL, crt, "cert",
+					  GNUTLS_PKCS11_OBJ_FLAG_MARK_PRIVATE |
+					  GNUTLS_PKCS11_OBJ_FLAG_LOGIN);
+	if (ret < 0) {
+		fail("gnutls_pkcs11_copy_x509_crt: %s\n", gnutls_strerror(ret));
+		exit(1);
+	}
+
+	ret =
+	    gnutls_pkcs11_copy_x509_privkey(SOFTHSM_URL, key, "cert",
+					    GNUTLS_KEY_DIGITAL_SIGNATURE |
+					    GNUTLS_KEY_KEY_ENCIPHERMENT,
+					    GNUTLS_PKCS11_OBJ_FLAG_MARK_PRIVATE
+					    |
+					    GNUTLS_PKCS11_OBJ_FLAG_MARK_SENSITIVE
+					    | GNUTLS_PKCS11_OBJ_FLAG_LOGIN);
+	if (ret < 0) {
+		fail("gnutls_pkcs11_copy_x509_privkey: %s\n",
+		     gnutls_strerror(ret));
+		exit(1);
+	}
+
+	gnutls_x509_crt_deinit(crt);
+	gnutls_x509_privkey_deinit(key);
+
+	assert(gnutls_certificate_allocate_credentials(&x509_cred)>=0);
+
+	/* Initialize TLS session
+	 */
+	assert(gnutls_init(&session, GNUTLS_CLIENT|GNUTLS_POST_HANDSHAKE_AUTH|GNUTLS_AUTO_REAUTH)>=0);
+
+	gnutls_handshake_set_timeout(session, 20 * 1000);
+
+	ret = gnutls_priority_set_direct(session, "NORMAL:-VERS-ALL:+VERS-TLS1.3:-SIGN-RSA-SHA256", NULL);
+	if (ret < 0)
+		fail("cannot set TLS 1.3 priorities\n");
+
+
+	assert(gnutls_certificate_set_x509_key_file(x509_cred,
+						    SOFTHSM_URL
+						    ";object=cert;object-type=cert",
+						    SOFTHSM_URL
+						    ";object=cert;object-type=private;pin-value="
+						    PIN,
+						    GNUTLS_X509_FMT_DER)>=0);
+
+	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));
+
+	if (debug)
+		success("client handshake completed\n");
+
+	gnutls_record_set_timeout(session, 20 * 1000);
+
+	if (debug)
+		success("waiting for auth\n");
+
+	do {
+		ret = gnutls_record_recv(session, buffer, sizeof(buffer));
+	} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
+
+	if (err) {
+		if (ret != err)
+			fail("client: expected error %s, got: %s\n", gnutls_strerror(err),
+			     gnutls_strerror(ret));
+	} else if (ret < 0)
+		fail("client: gnutls_record_recv did not succeed as expected: %s\n", gnutls_strerror(ret));
+
+	do {
+		ret = gnutls_bye(session, GNUTLS_SHUT_WR);
+	} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
+
+	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 TLS_EXT_POST_HANDSHAKE 49
+
+static void parse_ext(void *priv, gnutls_datum_t *msg)
+{
+	if (msg->size != 0) {
+		fail("error in extension length: %d\n", (int)msg->size);
+	}
+}
+
+static int hellos_callback(gnutls_session_t session, unsigned int htype,
+	unsigned post, unsigned int incoming, const gnutls_datum_t *msg)
+{
+	if (htype == GNUTLS_HANDSHAKE_SERVER_HELLO && post == GNUTLS_HOOK_POST) {
+		if (find_server_extension(msg, TLS_EXT_POST_HANDSHAKE, NULL, NULL)) {
+			fail("Post handshake extension seen in server hello!\n");
+		}
+		server_hello_ok = 1;
+
+		return GNUTLS_E_INTERRUPTED;
+	}
+
+	if (htype != GNUTLS_HANDSHAKE_CLIENT_HELLO || post != GNUTLS_HOOK_PRE)
+		return 0;
+
+	if (find_client_extension(msg, TLS_EXT_POST_HANDSHAKE, NULL, parse_ext))
+		client_hello_ok = 1;
+	else
+		fail("Post handshake extension NOT seen in client hello!\n");
+
+	return 0;
+}
+
+static void server(int fd, int err, int type)
+{
+	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(6);
+	}
+
+	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_POST_HANDSHAKE_AUTH);
+
+	gnutls_handshake_set_timeout(session, 20 * 1000);
+	gnutls_handshake_set_hook_function(session, GNUTLS_HANDSHAKE_ANY,
+					   GNUTLS_HOOK_BOTH,
+					   hellos_callback);
+
+	/* avoid calling all the priority functions, since the defaults
+	 * are adequate.
+	 */
+	gnutls_priority_set_direct(session, "NORMAL:-VERS-ALL:+VERS-TLS1.3", NULL);
+
+	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));
+
+	if (!(gnutls_session_get_flags(session) & GNUTLS_SFLAGS_POST_HANDSHAKE_AUTH)) {
+		fail("server: session flags did not contain GNUTLS_SFLAGS_POST_HANDSHAKE_AUTH\n");
+	}
+
+
+	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");
+	}
+
+	if (debug)
+		success("server handshake completed\n");
+
+	gnutls_certificate_server_set_request(session, type);
+
+	/* ask peer for re-authentication */
+	do {
+		ret = gnutls_reauth(session, 0);
+	} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
+
+	if (err) {
+		if (ret != err)
+			fail("server: expected error %s, got: %s\n", gnutls_strerror(err),
+			     gnutls_strerror(ret));
+	} else if (ret != 0)
+		fail("server: gnutls_reauth did not succeed as expected: %s\n", gnutls_strerror(ret));
+
+	do {
+		ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
+	} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
+
+	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 start(const char *name, int err, int cli_err, int type)
+{
+	int fd[2];
+	int ret;
+	pid_t child;
+	int status = 0;
+
+	success("testing %s\n", name);
+
+	client_hello_ok = 0;
+	server_hello_ok = 0;
+
+	signal(SIGCHLD, SIG_IGN);
+	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]);
+		client(fd[0], cli_err);
+		kill(child, SIGTERM);
+		wait(&status);
+		check_wait_status(status);
+	} else {
+		close(fd[0]);
+		server(fd[1], err, type);
+		exit(0);
+	}
+
+}
+
+void doit(void)
+{
+	const char *bin;
+	char buf[128];
+
+	/* initialize SoftHSM token that libpkcs11mock2.so internally uses */
+	bin = softhsm_bin();
+
+	set_softhsm_conf(CONFIG);
+	snprintf(buf, sizeof(buf),
+		 "%s --init-token --slot 0 --label test --so-pin " PIN " --pin "
+		 PIN, bin);
+	system(buf);
+
+	start("reauth-require", GNUTLS_E_CERTIFICATE_REQUIRED, GNUTLS_E_SUCCESS, GNUTLS_CERT_REQUIRE);
+	start("reauth-request", 0, GNUTLS_E_SUCCESS, GNUTLS_CERT_REQUEST);
+}
+#endif				/* _WIN32 */