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// Copyright 2020 The Gogs 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 smtp
import (
"crypto/tls"
"fmt"
"net/smtp"
"github.com/pkg/errors"
)
// Config contains configuration for SMTP authentication.
//
// ⚠️ WARNING: Change to the field name must preserve the INI key name for backward compatibility.
type Config struct {
Auth string
Host string
Port int
AllowedDomains string
TLS bool `ini:"tls"`
SkipVerify bool
}
func (c *Config) doAuth(auth smtp.Auth) error {
client, err := smtp.Dial(fmt.Sprintf("%s:%d", c.Host, c.Port))
if err != nil {
return err
}
defer client.Close()
if err = client.Hello("gogs"); err != nil {
return err
}
if c.TLS {
if ok, _ := client.Extension("STARTTLS"); ok {
if err = client.StartTLS(&tls.Config{
InsecureSkipVerify: c.SkipVerify,
ServerName: c.Host,
}); err != nil {
return err
}
} else {
return errors.New("SMTP server does not support TLS")
}
}
if ok, _ := client.Extension("AUTH"); ok {
if err = client.Auth(auth); err != nil {
return err
}
return nil
}
return errors.New("unsupported SMTP authentication method")
}
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