Files
proton-bridge/internal/bridge/credentials/credentials.go

138 lines
3.2 KiB
Go

// Copyright (c) 2020 Proton Technologies AG
//
// This file is part of ProtonMail Bridge.
//
// ProtonMail Bridge is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// ProtonMail Bridge is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>.
// Package credentials implements our struct stored in keychain.
// Store struct is kind of like a database client.
// Credentials struct is kind of like one record from the database.
package credentials
import (
"crypto/subtle"
"encoding/base64"
"errors"
"fmt"
"strings"
"github.com/ProtonMail/proton-bridge/pkg/config"
"github.com/sirupsen/logrus"
)
const sep = "\x00"
var (
log = config.GetLogEntry("bridge") //nolint[gochecknoglobals]
ErrWrongFormat = errors.New("backend/creds: malformed password")
)
type Credentials struct {
UserID, // Do not marshal; used as a key.
Name,
Emails,
APIToken,
MailboxPassword,
BridgePassword,
Version string
Timestamp int64
IsHidden, // Deprecated.
IsCombinedAddressMode bool
}
func (s *Credentials) Marshal() string {
items := []string{
s.Name, // 0
s.Emails, // 1
s.APIToken, // 2
s.MailboxPassword, // 3
s.BridgePassword, // 4
s.Version, // 5
"", // 6
"", // 7
"", // 8
}
items[6] = fmt.Sprint(s.Timestamp)
if s.IsHidden {
items[7] = "1"
}
if s.IsCombinedAddressMode {
items[8] = "1"
}
str := strings.Join(items, sep)
return base64.StdEncoding.EncodeToString([]byte(str))
}
func (s *Credentials) Unmarshal(secret string) error {
b, err := base64.StdEncoding.DecodeString(secret)
if err != nil {
return err
}
items := strings.Split(string(b), sep)
if len(items) != 9 {
return ErrWrongFormat
}
s.Name = items[0]
s.Emails = items[1]
s.APIToken = items[2]
s.MailboxPassword = items[3]
s.BridgePassword = items[4]
s.Version = items[5]
if _, err = fmt.Sscan(items[6], &s.Timestamp); err != nil {
s.Timestamp = 0
}
if s.IsHidden = false; items[7] == "1" {
s.IsHidden = true
}
if s.IsCombinedAddressMode = false; items[8] == "1" {
s.IsCombinedAddressMode = true
}
return nil
}
func (s *Credentials) SetEmailList(list []string) {
s.Emails = strings.Join(list, ";")
}
func (s *Credentials) EmailList() []string {
return strings.Split(s.Emails, ";")
}
func (s *Credentials) CheckPassword(password string) error {
if subtle.ConstantTimeCompare([]byte(s.BridgePassword), []byte(password)) != 1 {
log.WithFields(logrus.Fields{
"userID": s.UserID,
}).Debug("Incorrect bridge password")
return fmt.Errorf("backend/credentials: incorrect password")
}
return nil
}
func (s *Credentials) Logout() {
s.APIToken = ""
s.MailboxPassword = ""
}
func (s *Credentials) IsConnected() bool {
return s.APIToken != "" && s.MailboxPassword != ""
}