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

137 lines
3.2 KiB
Go

// Copyright (c) 2024 Proton AG
//
// This file is part of Proton Mail Bridge.
//
// Proton Mail 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.
//
// Proton Mail 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 Proton Mail 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 (
"encoding/base64"
"errors"
"fmt"
"strings"
"github.com/sirupsen/logrus"
)
const (
sep = "\x00"
itemLengthBridge = 9
itemLengthImportExport = 6 // Old format for Import-Export.
)
var (
log = logrus.WithField("pkg", "credentials") //nolint:gochecknoglobals
ErrWrongFormat = errors.New("malformed credentials")
)
type Credentials struct {
UserID, // Do not marshal; used as a key.
Name,
Emails,
APIToken string
MailboxPassword []byte
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
string(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) != itemLengthBridge && len(items) != itemLengthImportExport {
return ErrWrongFormat
}
s.Name = items[0]
s.Emails = items[1]
s.APIToken = items[2]
s.MailboxPassword = []byte(items[3])
switch len(items) {
case itemLengthBridge:
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
}
case itemLengthImportExport:
s.Version = items[4]
if _, err = fmt.Sscan(items[5], &s.Timestamp); err != nil {
s.Timestamp = 0
}
}
return nil
}
func (s *Credentials) EmailList() []string {
return strings.Split(s.Emails, ";")
}
func (s *Credentials) SplitAPIToken() (string, string, error) {
split := strings.Split(s.APIToken, ":")
if len(split) != 2 {
return "", "", errors.New("malformed API token")
}
return split[0], split[1], nil
}