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path: root/pkgs/tools/networking/libreswan/default.nix
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{ lib
, stdenv
, fetchurl
, nixosTests
, pkg-config
, systemd
, gmp
, unbound
, bison
, flex
, pam
, libevent
, libcap_ng
, libxcrypt
, curl
, nspr
, bash
, runtimeShell
, iproute2
, iptables
, procps
, coreutils
, gnused
, gawk
, nss
, which
, python3
, libselinux
, ldns
, xmlto
, docbook_xml_dtd_45
, docbook_xsl
, findXMLCatalogs
, dns-root-data
}:

let
  # Tools needed by ipsec scripts
  binPath = lib.makeBinPath [
    iproute2 iptables procps
    coreutils gnused gawk
    nss.tools which
  ];
in

stdenv.mkDerivation rec {
  pname = "libreswan";
  version = "5.0";

  src = fetchurl {
    url = "https://download.libreswan.org/${pname}-${version}.tar.gz";
    hash = "sha256-ELwK3JC56YGjDf77p9r/IAhB7LmRD51nHxN//BQUKGo=";
  };

  strictDeps = true;

  nativeBuildInputs = [
    bison
    flex
    pkg-config
    xmlto
    docbook_xml_dtd_45
    docbook_xsl
    findXMLCatalogs
  ];

  buildInputs = [
    systemd coreutils
    gnused gawk gmp unbound pam libevent
    libcap_ng libxcrypt curl nspr nss ldns
    # needed to patch shebangs
    python3 bash
  ] ++ lib.optional stdenv.isLinux libselinux;

  prePatch = ''
    # Replace wget with curl to save a dependency
    substituteInPlace programs/letsencrypt/letsencrypt.in \
      --replace-fail 'wget -q -P' '${curl}/bin/curl -s --remote-name-all --output-dir'
  '';

  makeFlags = [
    "PREFIX=$(out)"
    "INITSYSTEM=systemd"
    "SYSTEMUNITDIR=$(out)/etc/systemd/system/"
    "TMPFILESDIR=$(out)/lib/tmpfiles.d/"
    "LINUX_VARIANT=nixos"
    "DEFAULT_DNSSEC_ROOTKEY_FILE=${dns-root-data}/root.key"
  ];

  # Hack to make install work
  installFlags = [
    "VARDIR=\${out}/var"
    "SYSCONFDIR=\${out}/etc"
  ];

  postInstall = ''
    # Install letsencrypt config files
    install -m644 -Dt "$out/share/doc/libreswan/letsencrypt" docs/examples/*
  '';

  postFixup = ''
    # Add a PATH to the main "ipsec" script
    sed -e '0,/^$/{s||export PATH=${binPath}:$PATH|}' \
        -i $out/bin/ipsec
  '';

  passthru.tests.libreswan = nixosTests.libreswan;

  meta = with lib; {
    homepage = "https://libreswan.org";
    description = "A free software implementation of the VPN protocol based on IPSec and the Internet Key Exchange";
    platforms = platforms.linux ++ platforms.freebsd;
    license = with licenses; [ gpl2Plus mpl20 ] ;
    maintainers = with maintainers; [ afranchuk rnhmjoj ];
    mainProgram = "ipsec";
  };
}