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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package conf
import (
"errors"
"golang.zx2c4.com/wireguard/windows/conf/dpapi"
"io/ioutil"
"os"
"path/filepath"
"strings"
)
const configFileSuffix = ".conf.dpapi"
const configFileUnencryptedSuffix = ".conf"
func ListConfigNames() ([]string, error) {
configFileDir, err := resolveConfigFileDir()
if err != nil {
return nil, err
}
files, err := ioutil.ReadDir(configFileDir)
if err != nil {
return nil, err
}
configs := make([]string, len(files))
i := 0
for _, file := range files {
name := filepath.Base(file.Name())
if len(name) <= len(configFileSuffix) || !strings.HasSuffix(name, configFileSuffix) {
continue
}
if !file.Mode().IsRegular() || file.Mode().Perm()&0444 == 0 {
continue
}
name = strings.TrimSuffix(name, configFileSuffix)
if !TunnelNameIsValid(name) {
continue
}
configs[i] = name
i++
}
return configs[:i], nil
}
func MigrateUnencryptedConfigs() (int, []error) {
configFileDir, err := resolveConfigFileDir()
if err != nil {
return 0, []error{err}
}
files, err := ioutil.ReadDir(configFileDir)
if err != nil {
return 0, []error{err}
}
errs := make([]error, len(files))
i := 0
e := 0
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.Mode().IsRegular() || file.Mode().Perm()&0444 == 0 {
continue
}
// We don't use ioutil's 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 {
errs[e] = err
e++
continue
}
bytes, err := ioutil.ReadAll(f)
f.Close()
if err != nil {
errs[e] = err
e++
continue
}
_, err = FromWgQuick(string(bytes), "input")
if err != nil {
errs[e] = err
e++
continue
}
bytes, err = dpapi.Encrypt(bytes, strings.TrimSuffix(name, configFileUnencryptedSuffix))
if err != nil {
errs[e] = err
e++
continue
}
dstFile := strings.TrimSuffix(path, configFileUnencryptedSuffix) + configFileSuffix
if _, err = os.Stat(dstFile); err != nil && !os.IsNotExist(err) {
errs[e] = errors.New("Unable to migrate to " + dstFile + " as it already exists")
e++
continue
}
err = ioutil.WriteFile(dstFile, bytes, 0600)
if err != nil {
errs[e] = err
e++
continue
}
err = os.Remove(path)
if err != nil && os.Remove(dstFile) == nil {
errs[e] = err
e++
continue
}
i++
}
return i, errs[:e]
}
func LoadFromName(name string) (*Config, error) {
configFileDir, err := resolveConfigFileDir()
if err != nil {
return nil, err
}
return LoadFromPath(filepath.Join(configFileDir, name+configFileSuffix))
}
func LoadFromPath(path string) (*Config, error) {
name, err := NameFromPath(path)
if err != nil {
return nil, err
}
bytes, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
if strings.HasSuffix(path, configFileSuffix) {
bytes, err = dpapi.Decrypt(bytes, name)
if err != nil {
return nil, err
}
}
return FromWgQuick(string(bytes), name)
}
func NameFromPath(path string) (string, error) {
name := filepath.Base(path)
if !((len(name) > len(configFileSuffix) && strings.HasSuffix(name, configFileSuffix)) ||
(len(name) > len(configFileUnencryptedSuffix) && strings.HasSuffix(name, configFileUnencryptedSuffix))) {
return "", errors.New("Path must end in either " + configFileSuffix + " or " + configFileUnencryptedSuffix)
}
if strings.HasSuffix(path, configFileSuffix) {
name = strings.TrimSuffix(name, configFileSuffix)
} else {
name = strings.TrimSuffix(name, configFileUnencryptedSuffix)
}
if !TunnelNameIsValid(name) {
return "", errors.New("Tunnel name is not valid")
}
return name, nil
}
func (config *Config) Save() error {
if !TunnelNameIsValid(config.Name) {
return errors.New("Tunnel name is not valid")
}
configFileDir, err := resolveConfigFileDir()
if err != nil {
return err
}
filename := filepath.Join(configFileDir, config.Name+configFileSuffix)
bytes := []byte(config.ToWgQuick())
bytes, err = dpapi.Encrypt(bytes, config.Name)
if err != nil {
return err
}
err = ioutil.WriteFile(filename+".tmp", bytes, 0600)
if err != nil {
return err
}
err = os.Rename(filename+".tmp", filename)
if err != nil {
os.Remove(filename + ".tmp")
return err
}
return nil
}
func (config *Config) Path() (string, error) {
if !TunnelNameIsValid(config.Name) {
return "", errors.New("Tunnel name is not valid")
}
configFileDir, err := resolveConfigFileDir()
if err != nil {
return "", err
}
return filepath.Join(configFileDir, config.Name+configFileSuffix), nil
}
func DeleteName(name string) error {
if !TunnelNameIsValid(name) {
return errors.New("Tunnel name is not valid")
}
configFileDir, err := resolveConfigFileDir()
if err != nil {
return err
}
return os.Remove(filepath.Join(configFileDir, name+configFileSuffix))
}
func (config *Config) Delete() error {
return DeleteName(config.Name)
}
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