Adding dfu-suffix signing support to build system

- If dfu-suffix is not found, a warning is given and the binary is not signed
- Unsigned binaries are still ok with the latest version of dfu-util

Lib/CMake/FindDFUSuffix.cmake

@@ -0,0 +1,40 @@
+# The module defines the following variables:
+#   DFU_SUFFIX_EXECUTABLE - path to ctags command line client
+#   DFU_SUFFIX_FOUND - true if the command line client was found
+#   DFU_SUFFIX_VERSION_STRING - the version of dfu-suffix found (since CMake 2.8.8)
+# Example usage:
+#   find_package( DFUSuffix )
+#   if( DFU_SUFFIX_FOUND )
+#     message("ctags found: ${DFU_SUFFIX_EXECUTABLE}")
+#   endif()
+
+find_program ( DFU_SUFFIX_EXECUTABLE
+	NAMES dfu-suffix
+	DOC "dfu-suffix executable"
+)
+mark_as_advanced ( DFU_SUFFIX_EXECUTABLE )
+
+if ( DFU_SUFFIX_EXECUTABLE )
+	execute_process ( COMMAND ${DFU_SUFFIX_EXECUTABLE} --version
+		OUTPUT_VARIABLE dfu_suffix_version
+		ERROR_QUIET
+		OUTPUT_STRIP_TRAILING_WHITESPACE
+	)
+
+	if ( dfu_suffix_version MATCHES "^dfu-suffix \\(dfu-util\\)" )
+		string ( REPLACE "\n" "" DFU_SUFFIX_VERSION_STRING ${dfu_suffix_version} )
+		string ( REPLACE "dfu-suffix (dfu-util) " "" DFU_SUFFIX_VERSION_STRING ${DFU_SUFFIX_VERSION_STRING} )
+		string ( REGEX REPLACE "Copyright .*$" "" DFU_SUFFIX_VERSION_STRING ${DFU_SUFFIX_VERSION_STRING} )
+	endif ()
+	unset ( dfu_suffix_version )
+endif ()
+
+# Handle the QUIETLY and REQUIRED arguments and set DFU_SUFFIX_FOUND to TRUE if
+# all listed variables are TRUE
+
+include ( FindPackageHandleStandardArgs )
+find_package_handle_standard_args ( DFU_SUFFIX
+	REQUIRED_VARS DFU_SUFFIX_EXECUTABLE
+	VERSION_VAR DFU_SUFFIX_VERSION_STRING
+)
+

Lib/CMake/build.cmake

@@ -1,6 +1,6 @@
 ###| CMAKE Kiibohd Controller Source Configurator |###
 #
-# Written by Jacob Alexander in 2011-2014 for the Kiibohd Controller
+# Written by Jacob Alexander in 2011-2015 for the Kiibohd Controller
 #
 # Released into the Public Domain
 #
@@ -46,12 +46,25 @@ endif ()
 
 
 #| Convert the .ELF into a .bin to load onto the McHCK
+#| Then sign using dfu-suffix (requries dfu-util)
 if ( DEFINED DFU )
+	# dfu-suffix is required to sign the dfu binary
+	find_package ( DFUSuffix )
+
 	set( TARGET_BIN ${TARGET}.dfu.bin )
+	if ( DFU_SUFFIX_FOUND )
+		add_custom_command( TARGET ${TARGET_ELF} POST_BUILD
+			COMMAND ${OBJ_COPY} ${BIN_FLAGS} ${TARGET_ELF} ${TARGET_BIN}
+			COMMAND ${DFU_SUFFIX_EXECUTABLE} --add ${TARGET_BIN} --vid ${BOOT_VENDOR_ID} --pid ${BOOT_PRODUCT_ID} 1> /dev/null
+			COMMENT "Create and sign dfu bin file:  ${TARGET_BIN}"
+		)
+	else ()
+		message ( WARNING "DFU Binary has not been signed, requires dfu-suffix..." )
 		add_custom_command( TARGET ${TARGET_ELF} POST_BUILD
 			COMMAND ${OBJ_COPY} ${BIN_FLAGS} ${TARGET_ELF} ${TARGET_BIN}
 			COMMENT "Creating dfu binary file:      ${TARGET_BIN}"
 		)
+	endif ()
 endif ()