Add Sodium cryptography library

pkgs/development/libraries/sodium/default.nix

@@ -0,0 +1,28 @@
+{stdenv, fetchurl}:
+let
+  s = # Generated upstream information
+  rec {
+    baseName="sodium";
+    version="0.3";
+    name="${baseName}-${version}";
+    hash="0l1p0d7ag186hhs65kifp8jfgf4mm9rngv41bhq35d7d9gw2d2lh";
+    url="http://download.dnscrypt.org/libsodium/releases/libsodium-0.3.tar.gz";
+    sha256="0l1p0d7ag186hhs65kifp8jfgf4mm9rngv41bhq35d7d9gw2d2lh";
+  };
+  buildInputs = [
+  ];
+in
+stdenv.mkDerivation {
+  inherit (s) name version;
+  inherit buildInputs;
+  src = fetchurl {
+    inherit (s) url sha256;
+  };
+  meta = {
+    inherit (s) version;
+    description = ''A cryptography library with simple API'';
+    license = stdenv.lib.licenses.mit ;
+    maintainers = [stdenv.lib.maintainers.raskin];
+    platforms = stdenv.lib.platforms.linux;
+  };
+}

pkgs/development/libraries/sodium/default.upstream

@@ -0,0 +1 @@
+url http://download.dnscrypt.org/libsodium/releases/

pkgs/top-level/all-packages.nix

@@ -4969,6 +4969,8 @@ let
 
   snappy = callPackage ../development/libraries/snappy { };
 
+  sodium = callPackage ../development/libraries/sodium {};
+
   sofia_sip = callPackage ../development/libraries/sofia-sip { };
 
   soprano = callPackage ../development/libraries/soprano { };