config.go

   1 // mailpopbox
   2 // Copyright 2020 Blue Static <https://www.bluestatic.org>
   3 // This program is free software licensed under the GNU General Public License,
   4 // version 3.0. The full text of the license can be found in LICENSE.txt.
   5 // SPDX-License-Identifier: GPL-3.0-only
   6
   7 package main
   8
   9 import (
  10         "crypto/tls"
  11 )
  12
  13 type Config struct {
  14         SMTPPort int
  15         POP3Port int
  16
  17         // Hostname is the name of the MX server that is running.
  18         Hostname string
  19
  20         Servers []Server
  21 }
  22
  23 const MailboxAccount = "mailbox@"
  24
  25 type Server struct {
  26         // Domain is the second component of a mail address: <local-part@domain.com>.
  27         Domain string
  28
  29         TLSKeyPath  string
  30         TLSCertPath string
  31
  32         // Password for the POP3 mailbox user, mailbox@domain.com.
  33         MailboxPassword string
  34
  35         // Location to store the mail messages.
  36         MaildropPath string
  37
  38         // Addresses that should not accept mail. This should include the @domain
  39         // component.
  40         BlockedAddresses []string
  41 }
  42
  43 func (c Config) GetTLSConfig() (*tls.Config, error) {
  44         certs := make([]tls.Certificate, 0, len(c.Servers))
  45         for _, server := range c.Servers {
  46                 if server.TLSCertPath == "" {
  47                         continue
  48                 }
  49
  50                 cert, err := tls.LoadX509KeyPair(server.TLSCertPath, server.TLSKeyPath)
  51                 if err != nil {
  52                         return nil, err
  53                 }
  54                 certs = append(certs, cert)
  55         }
  56
  57         if len(certs) == 0 {
  58                 return nil, nil
  59         }
  60
  61         config := &tls.Config{
  62                 Certificates: certs,
  63         }
  64         config.BuildNameToCertificate()
  65         return config, nil
  66 }