Crypt module (#549)

- Moved cryptography code out of Tactility project and into a kernel module.
- Converted C++ code to C style interface
- Hardened security

Modules/crypt-module/CMakeLists.txt

@@ -0,0 +1,24 @@
+cmake_minimum_required(VERSION 3.20)
+
+include("${CMAKE_CURRENT_LIST_DIR}/../../Buildscripts/module.cmake")
+
+file(GLOB_RECURSE SOURCE_FILES "source/*.c*")
+
+list(APPEND REQUIRES_LIST
+    TactilityKernel
+    mbedtls
+)
+
+if (DEFINED ENV{ESP_IDF_VERSION})
+    list(APPEND REQUIRES_LIST
+        nvs_flash
+        esp_hw_support
+        esp_rom
+    )
+endif ()
+
+tactility_add_module(crypt-module
+    SRCS ${SOURCE_FILES}
+    INCLUDE_DIRS include/
+    REQUIRES ${REQUIRES_LIST}
+)