Add mkpasswd, an overfeatured front end to crypt

pkgs/tools/security/mkpasswd/default.nix

@@ -0,0 +1,28 @@
+{ stdenv, fetchurl
+}:
+  
+stdenv.mkDerivation rec {
+  name = "mkpasswd-${version}";
+
+  version = "5.0.20";
+
+  src = fetchurl {
+    url = "http://ftp.debian.org/debian/pool/main/w/whois/whois_${version}.tar.xz";
+    sha256 = "1kwf5pwc7w8dw40nrd4m4637mz7pbhc4c1v78j56nqj38sak50w1";
+  };
+
+  preConfigure = ''
+    substituteInPlace Makefile --replace "prefix = /usr" "prefix = $out"
+  '';
+
+  buildPhase = "make mkpasswd";
+
+  installPhase = "make install-mkpasswd";
+
+  meta = {
+    homepage = http://ftp.debian.org/debian/pool/main/w/whois/;
+    description = ''
+      Overfeatured front end to crypt, from the Debian whois package.
+    '';
+  };
+}

pkgs/top-level/all-packages.nix

@@ -1122,6 +1122,8 @@ let
 
   mkcue = callPackage ../tools/cd-dvd/mkcue { };
 
+  mkpasswd = callPackage ../tools/security/mkpasswd { };
+
   mktemp = callPackage ../tools/security/mktemp { };
 
   modemmanager = callPackage ../tools/networking/modemmanager {};