package main import ( "net/http" "strings" "github.com/Luzifer/go_helpers/str" yaml "gopkg.in/yaml.v2" ) func init() { registerAuthenticator(&authToken{}) } type authToken struct { Tokens map[string]string `yaml:"tokens"` Groups map[string][]string `yaml:"groups"` } // AuthenticatorID needs to return an unique string to identify // this special authenticator func (a authToken) AuthenticatorID() string { return "token" } // Configure loads the configuration for the Authenticator from the // global config.yaml file which is passed as a byte-slice. // If no configuration for the Authenticator is supplied the function // needs to return the errAuthenticatorUnconfigured func (a *authToken) Configure(yamlSource []byte) error { envelope := struct { Providers struct { Token *authToken `yaml:"token"` } `yaml:"providers"` }{} if err := yaml.Unmarshal(yamlSource, &envelope); err != nil { return err } if envelope.Providers.Token == nil { return errAuthenticatorUnconfigured } a.Tokens = envelope.Providers.Token.Tokens a.Groups = envelope.Providers.Token.Groups return nil } // DetectUser is used to detect a user without a login form from // a cookie, header or other methods // If no user was detected the errNoValidUserFound needs to be // returned func (a authToken) DetectUser(res http.ResponseWriter, r *http.Request) (string, []string, error) { authHeader := r.Header.Get("Authorization") if !strings.HasPrefix(authHeader, "Token ") { return "", nil, errNoValidUserFound } tmp := strings.SplitN(authHeader, " ", 2) suppliedToken := tmp[1] var ( user, token string userFound bool ) for user, token = range a.Tokens { if token == suppliedToken { userFound = true break } } if !userFound { return "", nil, errNoValidUserFound } groups := []string{} for group, users := range a.Groups { if str.StringInSlice(user, users) { groups = append(groups, group) } } return user, groups, nil } // Login is called when the user submits the login form and needs // to authenticate the user or throw an error. If the user has // successfully logged in the persistent cookie should be written // in order to use DetectUser for the next login. // If the user did not login correctly the errNoValidUserFound // needs to be returned func (a authToken) Login(res http.ResponseWriter, r *http.Request) error { return errNoValidUserFound } // LoginFields needs to return the fields required for this login // method. If no login using this method is possible the function // needs to return nil. func (a authToken) LoginFields() []loginField { return nil } // Logout is called when the user visits the logout endpoint and // needs to destroy any persistent stored cookies func (a authToken) Logout(res http.ResponseWriter, r *http.Request) error { return nil }