/
version.go
125 lines (102 loc) · 2.92 KB
/
version.go
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// 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 versioner
import (
"bytes"
"encoding/base64"
"fmt"
"os"
"path/filepath"
"github.com/Masterminds/semver/v3"
"github.com/ProtonMail/gopenpgp/v2/crypto"
"github.com/ProtonMail/proton-bridge/v3/pkg/sum"
)
const sumFile = ".sum"
const sigFile = ".sig"
type Version struct {
version *semver.Version
path string
}
type Versions []*Version
func (v Versions) Len() int {
return len(v)
}
func (v Versions) Less(i, j int) bool {
return v[i].version.LessThan(v[j].version)
}
func (v Versions) Swap(i, j int) {
v[i], v[j] = v[j], v[i]
}
func (v Versions) HasVersion(want *semver.Version) bool {
for i := range v {
if v[i].version.Equal(want) {
return true
}
}
return false
}
func (v *Version) String() string {
return fmt.Sprintf("%v", v.version)
}
func (v *Version) Equal(version *semver.Version) bool {
return v.version.Equal(version)
}
func (v *Version) SemVer() *semver.Version {
return v.version
}
// VerifyFiles verifies all files in the version directory.
func (v *Version) VerifyFiles(kr *crypto.KeyRing) error {
return VerifyUpdateFolder(kr, v.path)
}
func VerifyUpdateFolder(kr *crypto.KeyRing, path string) error {
fileBytes, err := os.ReadFile(filepath.Join(path, sumFile)) //nolint:gosec
if err != nil {
return err
}
sigBytes, err := os.ReadFile(filepath.Join(path, sumFile+sigFile)) //nolint:gosec
if err != nil {
return err
}
if err := kr.VerifyDetached(
crypto.NewPlainMessage(fileBytes),
crypto.NewPGPSignature(sigBytes),
crypto.GetUnixTime(),
); err != nil {
return err
}
sum, err := sum.RecursiveSum(path, sumFile)
if err != nil {
return err
}
if !bytes.Equal(sum, fileBytes) {
return fmt.Errorf(
"sum mismatch: %v should be %v",
base64.RawStdEncoding.EncodeToString(sum),
base64.RawStdEncoding.EncodeToString(fileBytes),
)
}
return nil
}
// GetExecutable returns the full path to the executable of the given version.
// It returns an error if the executable is missing or does not have executable permissions set.
func (v *Version) GetExecutable(name string) (string, error) {
return getExecutableInDirectory(name, v.path)
}
// Remove removes this version directory.
func (v *Version) Remove() error {
return os.RemoveAll(v.path)
}