Add test_memory test case

This patch adds a test_memory test case that demonstrates new[]/free
mismatches with the NK_read_config and NK_get_password_safe_slot_status
functions if run with valgrind, see #173.

2 files changed, 64 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1169e94..db8d2fb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -216,6 +216,7 @@ IF (COMPILE_TESTS)
                 unittest/test_HOTP.cc
                 unittest/test1.cc
                 unittest/test_issues.cc
+		unittest/test_memory.c
                 unittest/test_multiple_devices.cc
                 unittest/test_strdup.cpp
                 unittest/test_safe.cpp
diff --git a/unittest/test_memory.c b/unittest/test_memory.c
new file mode 100644
index 0000000..34ea7d5
--- /dev/null
+++ b/unittest/test_memory.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2020 Nitrokey UG
+ *
+ * This file is part of libnitrokey.
+ *
+ * libnitrokey is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * libnitrokey 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 libnitrokey. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-3.0
+ */
+
+#include <stdlib.h>
+#include "../NK_C_API.h"
+
+// This test should be run with valgrind to make sure that there are no
+// memory leaks in the tested functions:
+//     valgrind ./test_memory
+int main() {
+	int result = NK_login_auto();
+	if (result != 1)
+		return 1;
+  
+	int retry_count = NK_get_admin_retry_count();
+	if (retry_count != 3)
+		return 1;
+	retry_count = NK_get_user_retry_count();
+	if (retry_count != 3)
+		return 1;
+
+	enum NK_device_model model = NK_get_device_model();
+	if (model != NK_PRO && model != NK_STORAGE)
+		return 1;
+
+	uint8_t *config = NK_read_config();
+	if (config == NULL)
+		return 1;
+	free(config);
+
+	result = NK_enable_password_safe("123456");
+	if (result != 0)
+		return 1;
+
+	uint8_t *slot_status = NK_get_password_safe_slot_status();
+	if (slot_status == NULL) {
+		return 1;
+	}
+	free(slot_status);
+
+	NK_logout();
+
+	return 0;
+}
+