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// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
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 `ini:"NAME"`
From string `ini:"FROM"`
EnvelopeFrom string `ini:"ENVELOPE_FROM"`
OverrideEnvelopeFrom bool `ini:"-"`
FromName string `ini:"-"`
FromEmail string `ini:"-"`
SendAsPlainText bool `ini:"SEND_AS_PLAIN_TEXT"`
SubjectPrefix string `ini:"SUBJECT_PREFIX"`
// SMTP sender
Protocol string `ini:"PROTOCOL"`
SMTPAddr string `ini:"SMTP_ADDR"`
SMTPPort string `ini:"SMTP_PORT"`
User string `ini:"USER"`
Passwd string `ini:"PASSWD"`
EnableHelo bool `ini:"ENABLE_HELO"`
HeloHostname string `ini:"HELO_HOSTNAME"`
ForceTrustServerCert bool `ini:"FORCE_TRUST_SERVER_CERT"`
UseClientCert bool `ini:"USE_CLIENT_CERT"`
ClientCertFile string `ini:"CLIENT_CERT_FILE"`
ClientKeyFile string `ini:"CLIENT_KEY_FILE"`
// Sendmail sender
SendmailPath string `ini:"SENDMAIL_PATH"`
SendmailArgs []string `ini:"-"`
SendmailTimeout time.Duration `ini:"SENDMAIL_TIMEOUT"`
SendmailConvertCRLF bool `ini:"SENDMAIL_CONVERT_CRLF"`
}
// MailService the global mailer
var MailService *Mailer
func loadMailsFrom(rootCfg ConfigProvider) {
loadMailerFrom(rootCfg)
loadRegisterMailFrom(rootCfg)
loadNotifyMailFrom(rootCfg)
loadIncomingEmailFrom(rootCfg)
}
func loadMailerFrom(rootCfg ConfigProvider) {
sec := rootCfg.Section("mailer")
// Check mailer setting.
if !sec.Key("ENABLED").MustBool() {
return
}
// Handle Deprecations and map on to new configuration
// DEPRECATED should not be removed because users maybe upgrade from lower version to the latest version
// if these are removed, the warning will not be shown
deprecatedSetting(rootCfg, "mailer", "MAILER_TYPE", "mailer", "PROTOCOL", "v1.19.0")
if sec.HasKey("MAILER_TYPE") && !sec.HasKey("PROTOCOL") {
if sec.Key("MAILER_TYPE").String() == "sendmail" {
sec.Key("PROTOCOL").MustString("sendmail")
}
}
deprecatedSetting(rootCfg, "mailer", "HOST", "mailer", "SMTP_ADDR", "v1.19.0")
if sec.HasKey("HOST") && !sec.HasKey("SMTP_ADDR") {
givenHost := sec.Key("HOST").String()
addr, port, err := net.SplitHostPort(givenHost)
if err != nil && strings.Contains(err.Error(), "missing port in address") {
addr = givenHost
} else if err != nil {
log.Fatal("Invalid mailer.HOST (%s): %v", givenHost, err)
}
if addr == "" {
addr = "127.0.0.1"
}
sec.Key("SMTP_ADDR").MustString(addr)
sec.Key("SMTP_PORT").MustString(port)
}
deprecatedSetting(rootCfg, "mailer", "IS_TLS_ENABLED", "mailer", "PROTOCOL", "v1.19.0")
if sec.HasKey("IS_TLS_ENABLED") && !sec.HasKey("PROTOCOL") {
if sec.Key("IS_TLS_ENABLED").MustBool() {
sec.Key("PROTOCOL").MustString("smtps")
} else {
sec.Key("PROTOCOL").MustString("smtp+starttls")
}
}
deprecatedSetting(rootCfg, "mailer", "DISABLE_HELO", "mailer", "ENABLE_HELO", "v1.19.0")
if sec.HasKey("DISABLE_HELO") && !sec.HasKey("ENABLE_HELO") {
sec.Key("ENABLE_HELO").MustBool(!sec.Key("DISABLE_HELO").MustBool())
}
deprecatedSetting(rootCfg, "mailer", "SKIP_VERIFY", "mailer", "FORCE_TRUST_SERVER_CERT", "v1.19.0")
if sec.HasKey("SKIP_VERIFY") && !sec.HasKey("FORCE_TRUST_SERVER_CERT") {
sec.Key("FORCE_TRUST_SERVER_CERT").MustBool(sec.Key("SKIP_VERIFY").MustBool())
}
deprecatedSetting(rootCfg, "mailer", "USE_CERTIFICATE", "mailer", "USE_CLIENT_CERT", "v1.19.0")
if sec.HasKey("USE_CERTIFICATE") && !sec.HasKey("USE_CLIENT_CERT") {
sec.Key("USE_CLIENT_CERT").MustBool(sec.Key("USE_CERTIFICATE").MustBool())
}
deprecatedSetting(rootCfg, "mailer", "CERT_FILE", "mailer", "CLIENT_CERT_FILE", "v1.19.0")
if sec.HasKey("CERT_FILE") && !sec.HasKey("CLIENT_CERT_FILE") {
sec.Key("CERT_FILE").MustString(sec.Key("CERT_FILE").String())
}
deprecatedSetting(rootCfg, "mailer", "KEY_FILE", "mailer", "CLIENT_KEY_FILE", "v1.19.0")
if sec.HasKey("KEY_FILE") && !sec.HasKey("CLIENT_KEY_FILE") {
sec.Key("KEY_FILE").MustString(sec.Key("KEY_FILE").String())
}
deprecatedSetting(rootCfg, "mailer", "ENABLE_HTML_ALTERNATIVE", "mailer", "SEND_AS_PLAIN_TEXT", "v1.19.0")
if sec.HasKey("ENABLE_HTML_ALTERNATIVE") && !sec.HasKey("SEND_AS_PLAIN_TEXT") {
sec.Key("SEND_AS_PLAIN_TEXT").MustBool(!sec.Key("ENABLE_HTML_ALTERNATIVE").MustBool(false))
}
if sec.HasKey("PROTOCOL") && sec.Key("PROTOCOL").String() == "smtp+startls" {
log.Error("Deprecated fallback `[mailer]` `PROTOCOL = smtp+startls` present. Use `[mailer]` `PROTOCOL = smtp+starttls`` instead. This fallback will be removed in v1.19.0")
sec.Key("PROTOCOL").SetValue("smtp+starttls")
}
// Set default values & validate
sec.Key("NAME").MustString(AppName)
sec.Key("PROTOCOL").In("", []string{"smtp", "smtps", "smtp+starttls", "smtp+unix", "sendmail", "dummy"})
sec.Key("ENABLE_HELO").MustBool(true)
sec.Key("FORCE_TRUST_SERVER_CERT").MustBool(false)
sec.Key("USE_CLIENT_CERT").MustBool(false)
sec.Key("SENDMAIL_PATH").MustString("sendmail")
sec.Key("SENDMAIL_TIMEOUT").MustDuration(5 * time.Minute)
sec.Key("SENDMAIL_CONVERT_CRLF").MustBool(true)
sec.Key("FROM").MustString(sec.Key("USER").String())
// Now map the values on to the MailService
MailService = &Mailer{}
if err := sec.MapTo(MailService); err != nil {
log.Fatal("Unable to map [mailer] section on to MailService. Error: %v", err)
}
// Infer SMTPPort if not set
if MailService.SMTPPort == "" {
switch MailService.Protocol {
case "smtp":
MailService.SMTPPort = "25"
case "smtps":
MailService.SMTPPort = "465"
case "smtp+starttls":
MailService.SMTPPort = "587"
}
}
// Infer Protocol
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+starttls"
default:
log.Error("unable to infer unspecified mailer.PROTOCOL from mailer.SMTP_PORT = %q, assume using smtps", MailService.SMTPPort)
MailService.Protocol = "smtps"
if MailService.SMTPPort == "" {
MailService.SMTPPort = "465"
}
}
}
}
// 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
// This check is not needed for sendmail
switch MailService.Protocol {
case "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", sec.Key("SENDMAIL_ARGS").String(), err)
}
case "smtp", "smtps", "smtp+starttls", "smtp+unix":
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
}
}
}
case "dummy": // just mention and do nothing
}
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
}
log.Info("Mail Service Enabled")
}
func loadRegisterMailFrom(rootCfg ConfigProvider) {
if !rootCfg.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 loadNotifyMailFrom(rootCfg ConfigProvider) {
if !rootCfg.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
}
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