From 9d7701c370f06be663f2a485507d388ab5194ca8 Mon Sep 17 00:00:00 2001
From: Dennis Brentjes <d.brentjes@gmail.com>
Date: Wed, 31 Aug 2016 14:09:51 +0200
Subject: Added a CMake system to easily add and choose crypto implementations.

---
 CMakeModules/curve25519_implementations.cmake |  3 +++
 CMakeModules/get_target_name.cmake            | 10 ++++++++++
 CMakeModules/implementations.cmake            | 23 +++++++++++++++++++++++
 CMakeModules/rsa_implementations.cmake        |  3 +++
 4 files changed, 39 insertions(+)
 create mode 100644 CMakeModules/curve25519_implementations.cmake
 create mode 100644 CMakeModules/get_target_name.cmake
 create mode 100644 CMakeModules/implementations.cmake
 create mode 100644 CMakeModules/rsa_implementations.cmake

(limited to 'CMakeModules')

diff --git a/CMakeModules/curve25519_implementations.cmake b/CMakeModules/curve25519_implementations.cmake
new file mode 100644
index 0000000..6be8dca
--- /dev/null
+++ b/CMakeModules/curve25519_implementations.cmake
@@ -0,0 +1,3 @@
+include(implementations)
+
+DefineImplementations("curve25519")
diff --git a/CMakeModules/get_target_name.cmake b/CMakeModules/get_target_name.cmake
new file mode 100644
index 0000000..6e7c6fd
--- /dev/null
+++ b/CMakeModules/get_target_name.cmake
@@ -0,0 +1,10 @@
+
+function(get_target_name target_name)
+
+get_filename_component(implementation ${CMAKE_CURRENT_LIST_DIR} NAME)
+get_filename_component(implementation_path ${CMAKE_CURRENT_LIST_DIR} DIRECTORY)
+get_filename_component(algorithm ${implementation_path} NAME)
+
+set(${target_name} "${algorithm}-${implementation}" PARENT_SCOPE)
+
+endfunction(get_target_name)
diff --git a/CMakeModules/implementations.cmake b/CMakeModules/implementations.cmake
new file mode 100644
index 0000000..aa6a8bf
--- /dev/null
+++ b/CMakeModules/implementations.cmake
@@ -0,0 +1,23 @@
+function(DefineImplementations prefix)
+
+	FILE(GLOB children RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}/${prefix} ${CMAKE_CURRENT_SOURCE_DIR}/${prefix}/*)
+
+	set(implementations "")
+	foreach(child ${children})
+		IF(IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/${prefix}/${child})
+		    LIST(APPEND implementations ${child})
+		ENDIF()
+	ENDFOREACH()
+
+	list(LENGTH implementations nr_implementations)
+
+	if(nr_implementations EQUAL 0)
+		message(FATAL_ERROR "Cannot call DefineImplementations with an empty implementations list.")
+	endif()
+
+	list(GET implementations 0 default)
+	set(${prefix}_implementations ${implementations} PARENT_SCOPE)
+	set(${prefix}_implementation "${default}" CACHE STRING "${prefix} implementation chosen at configure time")
+	set_property(CACHE ${prefix}_implementation PROPERTY STRINGS ${implementations})
+
+endfunction(DefineImplementations)
diff --git a/CMakeModules/rsa_implementations.cmake b/CMakeModules/rsa_implementations.cmake
new file mode 100644
index 0000000..171058f
--- /dev/null
+++ b/CMakeModules/rsa_implementations.cmake
@@ -0,0 +1,3 @@
+include(implementations)
+
+DefineImplementations("rsa")
-- 
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