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path: root/lib/Net/MulkyID/Setup.pm
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#! /usr/bin/env perl
# Copyright 2012, Matthias Andreas Benkard <code@mail.matthias.benkard.de>.

package Net::MulkyID::Setup;

use common::sense;
use Modern::Perl;
use JSON;
use Crypt::OpenSSL::RSA;
use File::Slurp qw(write_file read_file);
use File::Path qw(make_path);
use File::Copy;
use LWP::Simple qw(getstore);
use Data::Dumper;

use base 'Exporter';
our @EXPORT = qw(setup);

sub prompt($$) {
  my ($question, $default) = @_;
  $|++;
  print "${question} \[${default}\] ";
  $_ = <>;
  chomp;
  if ($_) {
    return $_;
  } else {
    return $default;
  }
}

sub makespec($) {
  my ($key) = @_;
  my ($n, $e, @stuff) = $key->get_key_parameters;
  return
    encode_json({"public-key"     => {e => $e->to_decimal, n => $n->to_decimal, algorithm => "RS"},
                 "authentication" => "/browserid/authenticate.html",
                 "provisioning"   => "/browserid/provision.html"});
};

sub setup() {
  my $conffile = "www/config.pl";

  # Generate configuration file.
  $::MULKONF = { };
  if (stat($conffile)) {
    say "Found existing configuration ($conffile).";
    do $conffile;
  }

  my $configpath = $::MULKONF->{configpath} // "/etc/mulkyid";
  $configpath    = prompt("Where shall I put configuration files?", $configpath);
  my $pemfile    = $::MULKONF->{pemfile}    // "$configpath/rsa2048.pem";
  $pemfile       = prompt("Where shall I put the private key?", $pemfile);
  my $aliases_file = $::MULKONF->{aliases_file} // "/etc/aliases";
  $aliases_file  = prompt("Where is the aliases file?  Type a single dot for none.", $aliases_file);
  my $imap_server = $::MULKONF->{imap_server} // "localhost";
  $imap_server  = prompt("What is the IMAP server's address?", $imap_server);
  my $imap_port = $::MULKONF->{imap_port} // 143;
  $imap_port  = int(prompt("What is the IMAP server's port?", $imap_port));

  say "OK.";

  # Download jQuery.
  make_path("www/jquery");
  if (stat("www/jquery/jquery.js")) {
    say "Using existing copy of jQuery (www/jquery/jquery.js).";
  } else {
    say "Fetching jQuery...";
    getstore("http://code.jquery.com/jquery-1.7.2.min.js", "www/jquery/jquery.js")
      or die "Could not fetch jQuery";
    say "jQuery saved to: www/jquery/jquery.js";
  }

  # Generate the private key.
  my $key;
  if (stat($pemfile)) {
    say "Using existing private key ($pemfile).";
    $key = Crypt::OpenSSL::RSA->new_private_key(scalar read_file($pemfile));
  } else {
    say "Generating private key...";
    $key = Crypt::OpenSSL::RSA->generate_key(2048);
    make_path($configpath);
    write_file($pemfile, $key->get_private_key_string())
      or die "Could not write private key to $pemfile: $!";
    say "Private key saved to: $pemfile";
    chmod 0440, $pemfile;
  }

  # Generate spec file.
  write_file("browserid.json", makespec $key)
    or die "Could not write spec to browserid.json: $!";
  say "Persona spec file saved to: browserid.json";

  # Generate configuration file.
  $::MULKONF = {
    configpath   => $configpath,
    pemfile      => $pemfile,
    aliases_file => $aliases_file,
    imap_server  => $imap_server,
    imap_port    => $imap_port
  };
  write_file($conffile, <<EOF
#! /usr/bin/env perl
# NB. Do not edit this file directly.  It is overwritten with each run of setup.pl.
@{[Data::Dumper->Dump([$::MULKONF], ["::MULKONF"])]}
1;
EOF
  ) or die "Could not write configuration to $conffile: $!";
  say "Configuration saved to: $conffile";

  say "";
  say "******************************************************************";
  say "* FINISHED.                                                      *";
  say "*                                                                *";
  say "* Please put browserid.json where it will be served as           *";
  say "*     https://<whatever>/.well-known/browserid                   *";
  say "* with a content type of:                                        *";
  say "*     application/json                                           *";
  say "*                                                                *";
  say "* In addition, please ensure that the private key file can be    *";
  say "* read by the web server by assigning the file to the            *";
  say "* appropriate owner.                                             *";
  say "******************************************************************";
}

1;