nixpkgs/nixos/tests/common/acme/server/generate-certs.nix

# Minica can provide a CA key and cert, plus a key
# and cert for our fake CA server's Web Front End (WFE).
{
  pkgs ? import <nixpkgs> { },
  minica ? pkgs.minica,
  mkDerivation ? pkgs.stdenv.mkDerivation,
}:
let
  conf = import ./snakeoil-certs.nix;
  domain = conf.domain;
in
mkDerivation {
  name = "test-certs";
  buildInputs = [
    (minica.overrideAttrs (old: {
      prePatch = ''
        sed -i 's_NotAfter: time.Now().AddDate(2, 0, 30),_NotAfter: time.Now().AddDate(20, 0, 0),_' main.go
      '';
    }))
  ];
  dontUnpack = true;

  buildPhase = ''
    minica \
      --ca-key ca.key.pem \
      --ca-cert ca.cert.pem \
      --domains ${domain}
  '';

  installPhase = ''
    mkdir -p $out
    mv ca.*.pem $out/
    mv ${domain}/key.pem $out/${domain}.key.pem
    mv ${domain}/cert.pem $out/${domain}.cert.pem
  '';
}