115 lines
2.1 KiB
Go
115 lines
2.1 KiB
Go
package config
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import (
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cryptorand "crypto/rand"
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"encoding/base64"
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"os"
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"path/filepath"
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"github.com/goccy/go-yaml"
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)
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type WebConfig struct {
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Port int `yaml:"port"`
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Sock string `yaml:"sock"`
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SockMode string `yaml:"sock_mode"`
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SockGroup string `yaml:"sock_group"`
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SockDirMode string `yaml:"sock_dir_mode"`
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JWTSecret string `yaml:"jwt_secret"`
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}
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type DatabaseConfig struct {
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Type string `yaml:"type"`
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Path string `yaml:"path"`
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DSN string `yaml:"dsn"`
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}
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type Config struct {
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Web WebConfig `yaml:"web"`
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Database DatabaseConfig `yaml:"database"`
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}
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func defaultConfig() *Config {
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return &Config{
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Web: WebConfig{
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Port: 8080,
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Sock: "web.sock",
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SockMode: "0666",
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SockDirMode: "0755",
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},
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Database: DatabaseConfig{
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Type: "sqlite",
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Path: "data/lmvpn.db",
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DSN: "",
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},
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}
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}
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func Load(path string) (*Config, error) {
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dir := filepath.Dir(path)
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if err := os.MkdirAll(dir, 0700); err != nil {
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return nil, err
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}
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cfg := defaultConfig()
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data, err := os.ReadFile(path)
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if err != nil {
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if !os.IsNotExist(err) {
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return nil, err
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}
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if err := resolveJWTSecret(cfg); err != nil {
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return nil, err
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}
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if err := saveConfig(path, cfg); err != nil {
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return nil, err
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}
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return cfg, nil
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}
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if err := yaml.Unmarshal(data, cfg); err != nil {
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return nil, err
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}
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if err := resolveJWTSecret(cfg); err != nil {
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return nil, err
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}
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if err := saveConfig(path, cfg); err != nil {
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return nil, err
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}
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return cfg, nil
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}
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func resolveJWTSecret(cfg *Config) error {
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if envSecret := os.Getenv("LMVPN_JWT_SECRET"); envSecret != "" {
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cfg.Web.JWTSecret = envSecret
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return nil
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}
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if cfg.Web.JWTSecret != "" {
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return nil
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}
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secret, err := generateRandomSecret(32)
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if err != nil {
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return err
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}
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cfg.Web.JWTSecret = secret
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return nil
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}
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func generateRandomSecret(n int) (string, error) {
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b := make([]byte, n)
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if _, err := cryptorand.Read(b); err != nil {
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return "", err
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}
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return base64.StdEncoding.EncodeToString(b), nil
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}
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func saveConfig(path string, cfg *Config) error {
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data, err := yaml.Marshal(cfg)
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if err != nil {
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return err
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}
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return os.WriteFile(path, data, 0600)
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}
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