forked from Silverfish/proton-bridge
101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
// Copyright (c) 2020 Proton Technologies AG
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//
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// This file is part of ProtonMail Bridge.
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//
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// ProtonMail 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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// ProtonMail 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 ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package versioner
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import (
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"bytes"
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"errors"
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"io/ioutil"
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"os"
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"path/filepath"
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"github.com/Masterminds/semver/v3"
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"github.com/ProtonMail/gopenpgp/v2/crypto"
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"github.com/ProtonMail/proton-bridge/pkg/sum"
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)
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const sumFile = ".sum"
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type Version struct {
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version *semver.Version
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path string
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}
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type Versions []*Version
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func (v Versions) Len() int {
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return len(v)
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}
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func (v Versions) Less(i, j int) bool {
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return v[i].version.LessThan(v[j].version)
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}
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func (v Versions) Swap(i, j int) {
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v[i], v[j] = v[j], v[i]
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}
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// VerifyFiles verifies all files in the version directory.
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func (v *Version) VerifyFiles(kr *crypto.KeyRing) error {
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fileBytes, err := ioutil.ReadFile(filepath.Join(v.path, sumFile)) // nolint[gosec]
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if err != nil {
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return err
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}
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sigBytes, err := ioutil.ReadFile(filepath.Join(v.path, sumFile+".sig")) // nolint[gosec]
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if err != nil {
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return err
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}
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if err := kr.VerifyDetached(
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crypto.NewPlainMessage(fileBytes),
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crypto.NewPGPSignature(sigBytes),
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crypto.GetUnixTime(),
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); err != nil {
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return err
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}
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sum, err := sum.RecursiveSum(v.path, sumFile)
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if err != nil {
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return err
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}
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if !bytes.Equal(sum, fileBytes) {
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return errors.New("sum mismatch")
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}
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return nil
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}
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// GetExecutable returns the full path to the executable of the given version.
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// It returns an error if the executable is missing or does not have executable permissions set.
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func (v *Version) GetExecutable(name string) (string, error) {
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exe := filepath.Join(v.path, getExeName(name))
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if !fileExists(exe) || !fileIsExecutable(exe) {
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return "", ErrNoExecutable
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}
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return exe, nil
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}
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// Remove removes this version directory.
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func (v *Version) Remove() error {
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return os.RemoveAll(v.path)
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}
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