forked from Silverfish/proton-bridge
d120bbeffc
Rather than accessing the Bridge user list, each user register their individual SMTP service with the server manager. Note that some dependencies on the user data are hidden behind the `UserInterface`. These will be removed in a future patch.
109 lines
2.6 KiB
Go
109 lines
2.6 KiB
Go
// Copyright (c) 2023 Proton AG
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//
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// This file is part of Proton Mail Bridge.
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//
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// Proton Mail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Proton Mail Bridge is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package bridge
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"strings"
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smtpservice "github.com/ProtonMail/proton-bridge/v3/internal/services/smtp"
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"github.com/ProtonMail/proton-bridge/v3/internal/useragent"
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"github.com/emersion/go-smtp"
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"github.com/sirupsen/logrus"
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)
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type smtpBackend struct {
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accounts *smtpservice.Accounts
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userAgent UserAgentUpdater
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}
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type smtpSession struct {
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accounts *smtpservice.Accounts
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userAgent UserAgentUpdater
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userID string
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authID string
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from string
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to []string
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}
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func (be *smtpBackend) NewSession(*smtp.Conn) (smtp.Session, error) {
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return &smtpSession{accounts: be.accounts, userAgent: be.userAgent}, nil
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}
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func (s *smtpSession) AuthPlain(username, password string) error {
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userID, authID, err := s.accounts.CheckAuth(username, []byte(password))
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if err != nil {
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if !errors.Is(err, smtpservice.ErrNoSuchUser) {
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return fmt.Errorf("unknown error")
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}
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logrus.WithFields(logrus.Fields{
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"username": username,
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"pkg": "smtp",
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}).Error("Incorrect login credentials.")
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return fmt.Errorf("invalid username or password")
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}
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s.userID = userID
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s.authID = authID
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if strings.Contains(s.userAgent.GetUserAgent(), useragent.DefaultUserAgent) {
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s.userAgent.SetUserAgent(useragent.UnknownClient, useragent.DefaultVersion)
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}
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return nil
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}
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func (s *smtpSession) Reset() {
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s.from = ""
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s.to = nil
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}
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func (s *smtpSession) Logout() error {
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s.Reset()
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return nil
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}
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func (s *smtpSession) Mail(from string, _ *smtp.MailOptions) error {
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s.from = from
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return nil
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}
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func (s *smtpSession) Rcpt(to string) error {
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if len(to) > 0 {
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s.to = append(s.to, to)
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}
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return nil
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}
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func (s *smtpSession) Data(r io.Reader) error {
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err := s.accounts.SendMail(context.Background(), s.userID, s.authID, s.from, s.to, r)
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if err != nil {
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logrus.WithField("pkg", "smtp").WithError(err).Error("Send mail failed.")
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}
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return err
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}
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