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// Copyright 2021 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 smtp
import (
"errors"
"net/smtp"
"net/textproto"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/services/mailer"
)
// Authenticate queries if the provided login/password is authenticates against the SMTP server
// Users will be autoregistered as required
func (source *Source) Authenticate(user *models.User, login, password string) (*models.User, error) {
// Verify allowed domains.
if len(source.AllowedDomains) > 0 {
idx := strings.Index(login, "@")
if idx == -1 {
return nil, models.ErrUserNotExist{Name: login}
} else if !util.IsStringInSlice(login[idx+1:], strings.Split(source.AllowedDomains, ","), true) {
return nil, models.ErrUserNotExist{Name: login}
}
}
var auth smtp.Auth
switch source.Auth {
case PlainAuthentication:
auth = smtp.PlainAuth("", login, password, source.Host)
case LoginAuthentication:
auth = &loginAuthenticator{login, password}
case CRAMMD5Authentication:
auth = smtp.CRAMMD5Auth(login, password)
default:
return nil, errors.New("unsupported SMTP auth type")
}
if err := Authenticate(auth, source); err != nil {
// Check standard error format first,
// then fallback to worse case.
tperr, ok := err.(*textproto.Error)
if (ok && tperr.Code == 535) ||
strings.Contains(err.Error(), "Username and Password not accepted") {
return nil, models.ErrUserNotExist{Name: login}
}
if (ok && tperr.Code == 534) ||
strings.Contains(err.Error(), "Application-specific password required") {
return nil, models.ErrUserNotExist{Name: login}
}
return nil, err
}
if user != nil {
return user, nil
}
username := login
idx := strings.Index(login, "@")
if idx > -1 {
username = login[:idx]
}
user = &models.User{
LowerName: strings.ToLower(username),
Name: strings.ToLower(username),
Email: login,
Passwd: password,
LoginType: models.LoginSMTP,
LoginSource: source.loginSource.ID,
LoginName: login,
IsActive: true,
}
if err := models.CreateUser(user); err != nil {
return user, err
}
mailer.SendRegisterNotifyMail(user)
return user, nil
}
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