diff --git a/cmake/FindSodium.cmake b/cmake/FindSodium.cmake
new file mode 100644
index 00000000..fbcc45ad
--- /dev/null
+++ b/cmake/FindSodium.cmake
@@ -0,0 +1,293 @@
+# Written in 2016 by Henrik Steffen Gaßmann <henrik@gassmann.onl>
+#
+# To the extent possible under law, the author(s) have dedicated all copyright
+# and related and neighboring rights to this software to the public domain
+# worldwide. This software is distributed without any warranty.
+#
+# You should have received a copy of the CC0 Public Domain Dedication along with
+# this software. If not, see
+#
+# http://creativecommons.org/publicdomain/zero/1.0/
+#
+# ##############################################################################
+# Tries to find the local libsodium installation.
+#
+# On Windows the sodium_DIR environment variable is used as a default hint which
+# can be overridden by setting the corresponding cmake variable.
+#
+# Once done the following variables will be defined:
+#
+# sodium_FOUND sodium_INCLUDE_DIR sodium_LIBRARY_DEBUG sodium_LIBRARY_RELEASE
+# sodium_VERSION_STRING
+#
+# Furthermore an imported "sodium" target is created.
+#
+
+if(CMAKE_C_COMPILER_ID STREQUAL "GNU" OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
+  set(_GCC_COMPATIBLE 1)
+endif()
+
+# static library option
+if(NOT DEFINED sodium_USE_STATIC_LIBS)
+  option(sodium_USE_STATIC_LIBS "enable to statically link against sodium" OFF)
+endif()
+if(NOT (sodium_USE_STATIC_LIBS EQUAL sodium_USE_STATIC_LIBS_LAST))
+  unset(sodium_LIBRARY CACHE)
+  unset(sodium_LIBRARY_DEBUG CACHE)
+  unset(sodium_LIBRARY_RELEASE CACHE)
+  unset(sodium_DLL_DEBUG CACHE)
+  unset(sodium_DLL_RELEASE CACHE)
+  set(sodium_USE_STATIC_LIBS_LAST
+      ${sodium_USE_STATIC_LIBS}
+      CACHE INTERNAL "internal change tracking variable")
+endif()
+
+# ##############################################################################
+# UNIX
+if(UNIX)
+  # import pkg-config
+  find_package(PkgConfig)
+  if(PKG_CONFIG_FOUND)
+    pkg_check_modules(sodium_PKG QUIET libsodium)
+  endif()
+
+  if(sodium_USE_STATIC_LIBS)
+    if(sodium_PKG_STATIC_LIBRARIES)
+      foreach(_libname ${sodium_PKG_STATIC_LIBRARIES})
+        if(NOT _libname MATCHES "^lib.*\\.a$") # ignore strings already ending
+                                               # with .a
+          list(INSERT sodium_PKG_STATIC_LIBRARIES 0 "lib${_libname}.a")
+        endif()
+      endforeach()
+      list(REMOVE_DUPLICATES sodium_PKG_STATIC_LIBRARIES)
+    else()
+      # if pkgconfig for libsodium doesn't provide static lib info, then
+      # override PKG_STATIC here..
+      set(sodium_PKG_STATIC_LIBRARIES libsodium.a)
+    endif()
+
+    set(XPREFIX sodium_PKG_STATIC)
+  else()
+    if(sodium_PKG_LIBRARIES STREQUAL "")
+      set(sodium_PKG_LIBRARIES sodium)
+    endif()
+
+    set(XPREFIX sodium_PKG)
+  endif()
+
+  find_path(sodium_INCLUDE_DIR sodium.h HINTS ${${XPREFIX}_INCLUDE_DIRS})
+  find_library(sodium_LIBRARY_DEBUG
+               NAMES ${${XPREFIX}_LIBRARIES}
+               HINTS ${${XPREFIX}_LIBRARY_DIRS})
+  find_library(sodium_LIBRARY_RELEASE
+               NAMES ${${XPREFIX}_LIBRARIES}
+               HINTS ${${XPREFIX}_LIBRARY_DIRS})
+
+  # ############################################################################
+  # Windows
+elseif(WIN32)
+  set(sodium_DIR "$ENV{sodium_DIR}" CACHE FILEPATH "sodium install directory")
+  mark_as_advanced(sodium_DIR)
+
+  find_path(sodium_INCLUDE_DIR sodium.h
+            HINTS ${sodium_DIR}
+            PATH_SUFFIXES include)
+
+  if(MSVC)
+    # detect target architecture
+    file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/arch.cpp" [=[
+            #if defined _M_IX86
+            #error ARCH_VALUE x86_32
+            #elif defined _M_X64
+            #error ARCH_VALUE x86_64
+            #endif
+            #error ARCH_VALUE unknown
+        ]=])
+    try_compile(_UNUSED_VAR "${CMAKE_CURRENT_BINARY_DIR}"
+                "${CMAKE_CURRENT_BINARY_DIR}/arch.cpp"
+                OUTPUT_VARIABLE _COMPILATION_LOG)
+    string(REGEX
+           REPLACE ".*ARCH_VALUE ([a-zA-Z0-9_]+).*"
+                   "\\1"
+                   _TARGET_ARCH
+                   "${_COMPILATION_LOG}")
+
+    # construct library path
+    if(_TARGET_ARCH STREQUAL "x86_32")
+      string(APPEND _PLATFORM_PATH "Win32")
+    elseif(_TARGET_ARCH STREQUAL "x86_64")
+      string(APPEND _PLATFORM_PATH "x64")
+    else()
+      message(
+        FATAL_ERROR
+          "the ${_TARGET_ARCH} architecture is not supported by Findsodium.cmake."
+        )
+    endif()
+    string(APPEND _PLATFORM_PATH "/$$CONFIG$$")
+
+    if(MSVC_VERSION LESS 1900)
+      math(EXPR _VS_VERSION "${MSVC_VERSION} / 10 - 60")
+    else()
+      math(EXPR _VS_VERSION "${MSVC_VERSION} / 10 - 50")
+    endif()
+    string(APPEND _PLATFORM_PATH "/v${_VS_VERSION}")
+
+    if(sodium_USE_STATIC_LIBS)
+      string(APPEND _PLATFORM_PATH "/static")
+    else()
+      string(APPEND _PLATFORM_PATH "/dynamic")
+    endif()
+
+    string(REPLACE "$$CONFIG$$"
+                   "Debug"
+                   _DEBUG_PATH_SUFFIX
+                   "${_PLATFORM_PATH}")
+    string(REPLACE "$$CONFIG$$"
+                   "Release"
+                   _RELEASE_PATH_SUFFIX
+                   "${_PLATFORM_PATH}")
+
+    find_library(sodium_LIBRARY_DEBUG libsodium.lib
+                 HINTS ${sodium_DIR}
+                 PATH_SUFFIXES ${_DEBUG_PATH_SUFFIX})
+    find_library(sodium_LIBRARY_RELEASE libsodium.lib
+                 HINTS ${sodium_DIR}
+                 PATH_SUFFIXES ${_RELEASE_PATH_SUFFIX})
+    if(NOT sodium_USE_STATIC_LIBS)
+      set(CMAKE_FIND_LIBRARY_SUFFIXES_BCK ${CMAKE_FIND_LIBRARY_SUFFIXES})
+      set(CMAKE_FIND_LIBRARY_SUFFIXES ".dll")
+      find_library(sodium_DLL_DEBUG libsodium
+                   HINTS ${sodium_DIR}
+                   PATH_SUFFIXES ${_DEBUG_PATH_SUFFIX})
+      find_library(sodium_DLL_RELEASE libsodium
+                   HINTS ${sodium_DIR}
+                   PATH_SUFFIXES ${_RELEASE_PATH_SUFFIX})
+      set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES_BCK})
+    endif()
+
+  elseif(_GCC_COMPATIBLE)
+    if(sodium_USE_STATIC_LIBS)
+      find_library(sodium_LIBRARY_DEBUG libsodium.a
+                   HINTS ${sodium_DIR}
+                   PATH_SUFFIXES lib)
+      find_library(sodium_LIBRARY_RELEASE libsodium.a
+                   HINTS ${sodium_DIR}
+                   PATH_SUFFIXES lib)
+    else()
+      find_library(sodium_LIBRARY_DEBUG libsodium.dll.a
+                   HINTS ${sodium_DIR}
+                   PATH_SUFFIXES lib)
+      find_library(sodium_LIBRARY_RELEASE libsodium.dll.a
+                   HINTS ${sodium_DIR}
+                   PATH_SUFFIXES lib)
+
+      file(GLOB _DLL
+           LIST_DIRECTORIES false
+           RELATIVE "${sodium_DIR}/bin"
+           "${sodium_DIR}/bin/libsodium*.dll")
+      find_library(sodium_DLL_DEBUG ${_DLL} libsodium
+                   HINTS ${sodium_DIR}
+                   PATH_SUFFIXES bin)
+      find_library(sodium_DLL_RELEASE ${_DLL} libsodium
+                   HINTS ${sodium_DIR}
+                   PATH_SUFFIXES bin)
+    endif()
+  else()
+    message(FATAL_ERROR "this platform is not supported by FindSodium.cmake")
+  endif()
+
+  # ############################################################################
+  # unsupported
+else()
+  message(FATAL_ERROR "this platform is not supported by FindSodium.cmake")
+endif()
+
+# ##############################################################################
+# common stuff
+
+# extract sodium version
+if(sodium_INCLUDE_DIR)
+  set(_VERSION_HEADER "${sodium_INCLUDE_DIR}/sodium/version.h")
+  if(EXISTS "${_VERSION_HEADER}")
+    file(READ "${_VERSION_HEADER}" _VERSION_HEADER_CONTENT)
+    string(
+      REGEX
+      REPLACE
+      ".*#define[ \t]*SODIUM_VERSION_STRING[ \t]*\"([^\n]*)\".*"
+        "\\1"
+        sodium_VERSION_STRING
+        "${_VERSION_HEADER_CONTENT}")
+    set(sodium_VERSION_STRING "${sodium_VERSION_STRING}")
+  endif()
+endif()
+
+# communicate results
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(sodium
+                                  REQUIRED_VARS
+                                  sodium_LIBRARY_RELEASE
+                                  sodium_LIBRARY_DEBUG
+                                  sodium_INCLUDE_DIR
+                                  VERSION_VAR
+                                  sodium_VERSION_STRING)
+
+# mark file paths as advanced
+mark_as_advanced(sodium_INCLUDE_DIR)
+mark_as_advanced(sodium_LIBRARY_DEBUG)
+mark_as_advanced(sodium_LIBRARY_RELEASE)
+if(WIN32)
+  mark_as_advanced(sodium_DLL_DEBUG)
+  mark_as_advanced(sodium_DLL_RELEASE)
+endif()
+
+# create imported target
+if(sodium_USE_STATIC_LIBS)
+  set(_LIB_TYPE STATIC)
+else()
+  set(_LIB_TYPE SHARED)
+endif()
+add_library(sodium ${_LIB_TYPE} IMPORTED)
+
+set_target_properties(sodium
+                      PROPERTIES INTERFACE_INCLUDE_DIRECTORIES
+                                 "${sodium_INCLUDE_DIR}"
+                                 IMPORTED_LINK_INTERFACE_LANGUAGES
+                                 "C")
+
+if(sodium_USE_STATIC_LIBS)
+  set_target_properties(sodium
+                        PROPERTIES INTERFACE_COMPILE_DEFINITIONS
+                                   "SODIUM_STATIC"
+                                   IMPORTED_LOCATION
+                                   "${sodium_LIBRARY_RELEASE}"
+                                   IMPORTED_LOCATION_DEBUG
+                                   "${sodium_LIBRARY_DEBUG}")
+else()
+  if(UNIX)
+    set_target_properties(sodium
+                          PROPERTIES IMPORTED_LOCATION
+                                     "${sodium_LIBRARY_RELEASE}"
+                                     IMPORTED_LOCATION_DEBUG
+                                     "${sodium_LIBRARY_DEBUG}")
+  elseif(WIN32)
+    set_target_properties(sodium
+                          PROPERTIES IMPORTED_IMPLIB
+                                     "${sodium_LIBRARY_RELEASE}"
+                                     IMPORTED_IMPLIB_DEBUG
+                                     "${sodium_LIBRARY_DEBUG}")
+    if(NOT (sodium_DLL_DEBUG MATCHES ".*-NOTFOUND"))
+      set_target_properties(sodium
+                            PROPERTIES IMPORTED_LOCATION_DEBUG
+                                       "${sodium_DLL_DEBUG}")
+    endif()
+    if(NOT (sodium_DLL_RELEASE MATCHES ".*-NOTFOUND"))
+      set_target_properties(sodium
+                            PROPERTIES IMPORTED_LOCATION_RELWITHDEBINFO
+                                       "${sodium_DLL_RELEASE}"
+                                       IMPORTED_LOCATION_MINSIZEREL
+                                       "${sodium_DLL_RELEASE}"
+                                       IMPORTED_LOCATION_RELEASE
+                                       "${sodium_DLL_RELEASE}")
+    endif()
+  endif()
+endif()