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// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package setting
import (
"net"
"net/mail"
"strings"
"time"
"code.gitea.io/gitea/modules/log"
shellquote "github.com/kballard/go-shellquote"
)
// Mailer represents mail service.
type Mailer struct {
// Mailer
Name string
From string
EnvelopeFrom string
OverrideEnvelopeFrom bool `ini:"-"`
FromName string
FromEmail string
SendAsPlainText bool
SubjectPrefix string
// SMTP sender
Protocol string
SMTPAddr string
SMTPPort string
User, Passwd string
EnableHelo bool
HeloHostname string
ForceTrustServerCert bool
UseClientCert bool
ClientCertFile string
ClientKeyFile string
// Sendmail sender
SendmailPath string
SendmailArgs []string
SendmailTimeout time.Duration
SendmailConvertCRLF bool
}
// MailService the global mailer
var MailService *Mailer
func newMailService() {
sec := Cfg.Section("mailer")
// Check mailer setting.
if !sec.Key("ENABLED").MustBool() {
return
}
MailService = &Mailer{
Name: sec.Key("NAME").MustString(AppName),
SendAsPlainText: sec.Key("SEND_AS_PLAIN_TEXT").MustBool(false),
Protocol: sec.Key("PROTOCOL").In("", []string{"smtp", "smtps", "smtp+startls", "smtp+unix", "sendmail", "dummy"}),
SMTPAddr: sec.Key("SMTP_ADDR").String(),
SMTPPort: sec.Key("SMTP_PORT").String(),
User: sec.Key("USER").String(),
Passwd: sec.Key("PASSWD").String(),
EnableHelo: sec.Key("ENABLE_HELO").MustBool(true),
HeloHostname: sec.Key("HELO_HOSTNAME").String(),
ForceTrustServerCert: sec.Key("FORCE_TRUST_SERVER_CERT").MustBool(false),
UseClientCert: sec.Key("USE_CLIENT_CERT").MustBool(false),
ClientCertFile: sec.Key("CLIENT_CERT_FILE").String(),
ClientKeyFile: sec.Key("CLIENT_KEY_FILE").String(),
SubjectPrefix: sec.Key("SUBJECT_PREFIX").MustString(""),
SendmailPath: sec.Key("SENDMAIL_PATH").MustString("sendmail"),
SendmailTimeout: sec.Key("SENDMAIL_TIMEOUT").MustDuration(5 * time.Minute),
SendmailConvertCRLF: sec.Key("SENDMAIL_CONVERT_CRLF").MustBool(true),
}
MailService.From = sec.Key("FROM").MustString(MailService.User)
MailService.EnvelopeFrom = sec.Key("ENVELOPE_FROM").MustString("")
// FIXME: DEPRECATED to be removed in v1.19.0
deprecatedSetting("mailer", "MAILER_TYPE", "mailer", "PROTOCOL")
if sec.HasKey("MAILER_TYPE") && !sec.HasKey("PROTOCOL") {
if sec.Key("MAILER_TYPE").String() == "sendmail" {
MailService.Protocol = "sendmail"
}
}
// FIXME: DEPRECATED to be removed in v1.19.0
deprecatedSetting("mailer", "HOST", "mailer", "SMTP_ADDR")
if sec.HasKey("HOST") && !sec.HasKey("SMTP_ADDR") {
givenHost := sec.Key("HOST").String()
addr, port, err := net.SplitHostPort(givenHost)
if err != nil {
log.Fatal("Invalid mailer.HOST (%s): %v", givenHost, err)
}
MailService.SMTPAddr = addr
MailService.SMTPPort = port
}
// FIXME: DEPRECATED to be removed in v1.19.0
deprecatedSetting("mailer", "IS_TLS_ENABLED", "mailer", "PROTOCOL")
if sec.HasKey("IS_TLS_ENABLED") && !sec.HasKey("PROTOCOL") {
if sec.Key("IS_TLS_ENABLED").MustBool() {
MailService.Protocol = "smtps"
} else {
MailService.Protocol = "smtp+startls"
}
}
if MailService.SMTPPort == "" {
switch MailService.Protocol {
case "smtp":
MailService.SMTPPort = "25"
case "smtps":
MailService.SMTPPort = "465"
case "smtp+startls":
MailService.SMTPPort = "587"
}
}
if MailService.Protocol == "" {
if strings.ContainsAny(MailService.SMTPAddr, "/\\") {
MailService.Protocol = "smtp+unix"
} else {
switch MailService.SMTPPort {
case "25":
MailService.Protocol = "smtp"
case "465":
MailService.Protocol = "smtps"
case "587":
MailService.Protocol = "smtp+startls"
default:
log.Error("unable to infer unspecified mailer.PROTOCOL from mailer.SMTP_PORT = %q, assume using smtps", MailService.SMTPPort)
MailService.Protocol = "smtps"
}
}
}
// we want to warn if users use SMTP on a non-local IP;
// we might as well take the opportunity to check that it has an IP at all
ips := tryResolveAddr(MailService.SMTPAddr)
if MailService.Protocol == "smtp" {
for _, ip := range ips {
if !ip.IsLoopback() {
log.Warn("connecting over insecure SMTP protocol to non-local address is not recommended")
break
}
}
}
// FIXME: DEPRECATED to be removed in v1.19.0
deprecatedSetting("mailer", "DISABLE_HELO", "mailer", "ENABLE_HELO")
if sec.HasKey("DISABLE_HELO") && !sec.HasKey("ENABLE_HELO") {
MailService.EnableHelo = !sec.Key("DISABLE_HELO").MustBool()
}
// FIXME: DEPRECATED to be removed in v1.19.0
deprecatedSetting("mailer", "SKIP_VERIFY", "mailer", "FORCE_TRUST_SERVER_CERT")
if sec.HasKey("SKIP_VERIFY") && !sec.HasKey("FORCE_TRUST_SERVER_CERT") {
MailService.ForceTrustServerCert = sec.Key("SKIP_VERIFY").MustBool()
}
// FIXME: DEPRECATED to be removed in v1.19.0
deprecatedSetting("mailer", "USE_CERTIFICATE", "mailer", "USE_CLIENT_CERT")
if sec.HasKey("USE_CERTIFICATE") && !sec.HasKey("USE_CLIENT_CERT") {
MailService.UseClientCert = sec.Key("USE_CLIENT_CERT").MustBool()
}
// FIXME: DEPRECATED to be removed in v1.19.0
deprecatedSetting("mailer", "CERT_FILE", "mailer", "CLIENT_CERT_FILE")
if sec.HasKey("CERT_FILE") && !sec.HasKey("CLIENT_CERT_FILE") {
MailService.ClientCertFile = sec.Key("CERT_FILE").String()
}
// FIXME: DEPRECATED to be removed in v1.19.0
deprecatedSetting("mailer", "KEY_FILE", "mailer", "CLIENT_KEY_FILE")
if sec.HasKey("KEY_FILE") && !sec.HasKey("CLIENT_KEY_FILE") {
MailService.ClientKeyFile = sec.Key("KEY_FILE").String()
}
// FIXME: DEPRECATED to be removed in v1.19.0
deprecatedSetting("mailer", "ENABLE_HTML_ALTERNATIVE", "mailer", "SEND_AS_PLAIN_TEXT")
if sec.HasKey("ENABLE_HTML_ALTERNATIVE") && !sec.HasKey("SEND_AS_PLAIN_TEXT") {
MailService.SendAsPlainText = !sec.Key("ENABLE_HTML_ALTERNATIVE").MustBool(false)
}
if MailService.From != "" {
parsed, err := mail.ParseAddress(MailService.From)
if err != nil {
log.Fatal("Invalid mailer.FROM (%s): %v", MailService.From, err)
}
MailService.FromName = parsed.Name
MailService.FromEmail = parsed.Address
} else {
log.Error("no mailer.FROM provided, email system may not work.")
}
switch MailService.EnvelopeFrom {
case "":
MailService.OverrideEnvelopeFrom = false
case "<>":
MailService.EnvelopeFrom = ""
MailService.OverrideEnvelopeFrom = true
default:
parsed, err := mail.ParseAddress(MailService.EnvelopeFrom)
if err != nil {
log.Fatal("Invalid mailer.ENVELOPE_FROM (%s): %v", MailService.EnvelopeFrom, err)
}
MailService.OverrideEnvelopeFrom = true
MailService.EnvelopeFrom = parsed.Address
}
if MailService.Protocol == "sendmail" {
var err error
MailService.SendmailArgs, err = shellquote.Split(sec.Key("SENDMAIL_ARGS").String())
if err != nil {
log.Error("Failed to parse Sendmail args: %s with error %v", CustomConf, err)
}
}
log.Info("Mail Service Enabled")
}
func newRegisterMailService() {
if !Cfg.Section("service").Key("REGISTER_EMAIL_CONFIRM").MustBool() {
return
} else if MailService == nil {
log.Warn("Register Mail Service: Mail Service is not enabled")
return
}
Service.RegisterEmailConfirm = true
log.Info("Register Mail Service Enabled")
}
func newNotifyMailService() {
if !Cfg.Section("service").Key("ENABLE_NOTIFY_MAIL").MustBool() {
return
} else if MailService == nil {
log.Warn("Notify Mail Service: Mail Service is not enabled")
return
}
Service.EnableNotifyMail = true
log.Info("Notify Mail Service Enabled")
}
func tryResolveAddr(addr string) []net.IP {
if strings.HasPrefix(addr, "[") && strings.HasSuffix(addr, "]") {
addr = addr[1 : len(addr)-1]
}
ip := net.ParseIP(addr)
if ip != nil {
ips := make([]net.IP, 1)
ips[0] = ip
return ips
}
ips, err := net.LookupIP(addr)
if err != nil {
log.Warn("could not look up mailer.SMTP_ADDR: %v", err)
return make([]net.IP, 0)
}
return ips
}