mirror of
https://github.com/ProtonMail/proton-bridge.git
synced 2025-12-10 12:46:46 +00:00
0f125196a6
There was a race condition internal to the go-smtp library. In order to fix it, a version bump was necessary. However, this significantly changed the library interface.
103 lines
2.9 KiB
Go
103 lines
2.9 KiB
Go
// Copyright (c) 2022 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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"crypto/tls"
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"fmt"
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"net"
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"strconv"
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"github.com/ProtonMail/proton-bridge/v2/internal/logging"
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"github.com/ProtonMail/proton-bridge/v2/internal/constants"
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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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func (bridge *Bridge) serveSMTP() error {
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smtpListener, err := newListener(bridge.vault.GetSMTPPort(), bridge.vault.GetSMTPSSL(), bridge.tlsConfig)
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if err != nil {
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return fmt.Errorf("failed to create SMTP listener: %w", err)
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}
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go func() {
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if err := bridge.smtpServer.Serve(smtpListener); err != nil {
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logrus.WithError(err).Error("SMTP server stopped")
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}
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}()
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_, port, err := net.SplitHostPort(smtpListener.Addr().String())
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if err != nil {
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return fmt.Errorf("failed to get SMTP listener address: %w", err)
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}
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portInt, err := strconv.Atoi(port)
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if err != nil {
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return fmt.Errorf("failed to convert SMTP listener port to int: %w", err)
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}
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if portInt != bridge.vault.GetSMTPPort() {
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if err := bridge.vault.SetSMTPPort(portInt); err != nil {
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return fmt.Errorf("failed to update SMTP port in vault: %w", err)
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}
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}
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return nil
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}
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func (bridge *Bridge) restartSMTP() error {
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if err := bridge.closeSMTP(); err != nil {
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return err
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}
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bridge.smtpServer = newSMTPServer(&smtpBackend{bridge}, bridge.tlsConfig, bridge.logSMTP)
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return bridge.serveSMTP()
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}
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func (bridge *Bridge) closeSMTP() error {
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if err := bridge.smtpServer.Close(); err != nil {
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logrus.WithError(err).Warn("Failed to close SMTP server")
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}
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// Don't close the SMTP listener -- it's closed by the server.
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return nil
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}
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func newSMTPServer(smtpBackend *smtpBackend, tlsConfig *tls.Config, shouldLog bool) *smtp.Server {
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smtpServer := smtp.NewServer(smtpBackend)
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smtpServer.TLSConfig = tlsConfig
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smtpServer.Domain = constants.Host
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smtpServer.AllowInsecureAuth = true
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smtpServer.MaxLineLength = 1 << 16
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smtpServer.ErrorLog = logging.NewSMTPLogger()
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if shouldLog {
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log := logrus.WithField("protocol", "SMTP")
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log.Warning("================================================")
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log.Warning("THIS LOG WILL CONTAIN **DECRYPTED** MESSAGE DATA")
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log.Warning("================================================")
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smtpServer.Debug = logging.NewSMTPDebugLogger()
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}
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return smtpServer
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}
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