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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019-2021 WireGuard LLC. All Rights Reserved.
*/
package conf
import (
"errors"
"io"
"log"
"os"
"path/filepath"
"strings"
"sync"
"time"
"golang.org/x/sys/windows"
)
var migrating sync.Mutex
var lastMigrationTimer *time.Timer
func MigrateUnencryptedConfigs() { migrateUnencryptedConfigs(3) }
func migrateUnencryptedConfigs(sharingBase int) {
migrating.Lock()
defer migrating.Unlock()
configFileDir, err := tunnelConfigurationsDirectory()
if err != nil {
return
}
files, err := os.ReadDir(configFileDir)
if err != nil {
return
}
ignoreSharingViolations := false
for _, file := range files {
path := filepath.Join(configFileDir, file.Name())
name := filepath.Base(file.Name())
if len(name) <= len(configFileUnencryptedSuffix) || !strings.HasSuffix(name, configFileUnencryptedSuffix) {
continue
}
if !file.Type().IsRegular() {
continue
}
info, err := file.Info()
if err != nil {
continue
}
if info.Mode().Perm()&0444 == 0 {
continue
}
var bytes []byte
var config *Config
// We don't use os.ReadFile, because we actually want RDWR, so that we can take advantage
// of Windows file locking for ensuring the file is finished being written.
f, err := os.OpenFile(path, os.O_RDWR, 0)
if err != nil {
if errors.Is(err, windows.ERROR_SHARING_VIOLATION) {
if ignoreSharingViolations {
continue
} else if sharingBase > 0 {
if lastMigrationTimer != nil {
lastMigrationTimer.Stop()
}
lastMigrationTimer = time.AfterFunc(time.Second/time.Duration(sharingBase*sharingBase), func() { migrateUnencryptedConfigs(sharingBase - 1) })
ignoreSharingViolations = true
continue
}
}
goto error
}
bytes, err = io.ReadAll(f)
f.Close()
if err != nil {
goto error
}
config, err = FromWgQuickWithUnknownEncoding(string(bytes), strings.TrimSuffix(name, configFileUnencryptedSuffix))
if err != nil {
goto error
}
err = config.Save(false)
if err != nil {
goto error
}
err = os.Remove(path)
if err != nil {
log.Printf("Unable to remove old path %#q: %v", path, err)
}
continue
error:
log.Printf("Unable to ingest and encrypt %#q: %v", path, err)
}
}
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