package main import ( "errors" "io/ioutil" "path" "strings" "time" "gopkg.in/yaml.v2" ) const defKeySize = 2048 type Config struct { Gracetime time.Duration Listen string ListenTLS string Basedir string KeySize int Provider map[string]string Account map[string]account Desire map[string]desire Hook map[string]string } type account struct { Mail string Phone string KeySize int Key string } type desire struct { Provider string Account string Altnames []string KeySize int Key string Cert string Webroot string Hook []string } var ( errNoProvider = errors.New("no provider specified") errNoAccount = errors.New("no account specified") errNoKey = errors.New("no key specified") errNoCert = errors.New("no cert specified") errNoAltNames = errors.New("no altnames specified") errNoMail = errors.New("no mail specified") ) func LoadConfig(fname string) (*Config, error) { c := &Config{} conf, err := ioutil.ReadFile(fname) if err != nil { return nil, err } err = yaml.Unmarshal(conf, c) if err != nil { return nil, err } // apply defaults if c.KeySize == 0 { c.KeySize = defKeySize } for k, v := range c.Account { if v.KeySize == 0 { v.KeySize = c.KeySize } if v.Mail == "" { return nil, errNoMail } if v.Key == "" { return nil, errNoKey } if c.Basedir != "" { v.Key = path.Join(c.Basedir, v.Key) } c.Account[k] = v } for k, v := range c.Desire { if v.Provider == "" { return nil, errNoProvider } if v.Account == "" { return nil, errNoAccount } if v.KeySize == 0 { v.KeySize = c.KeySize } if v.Key == "" { return nil, errNoKey } if v.Cert == "" { return nil, errNoCert } if c.Basedir != "" { v.Key = path.Join(c.Basedir, v.Key) v.Cert = path.Join(c.Basedir, v.Cert) } switch len(v.Altnames) { case 0: return nil, errNoAltNames case 1: an := v.Altnames[0] if strings.HasPrefix(an, "www.") { v.Altnames = append(v.Altnames, an[4:]) } } c.Desire[k] = v } return c, nil }