package registry import ( "encoding/json" "fmt" "io/ioutil" "net/http" "strings" "sync" "time" "github.com/Sirupsen/logrus" "github.com/docker/docker/cliconfig" ) type RequestAuthorization struct { authConfig *cliconfig.AuthConfig registryEndpoint *Endpoint resource string scope string actions []string tokenLock sync.Mutex tokenCache string tokenExpiration time.Time } func NewRequestAuthorization(authConfig *cliconfig.AuthConfig, registryEndpoint *Endpoint, resource, scope string, actions []string) *RequestAuthorization { return &RequestAuthorization{ authConfig: authConfig, registryEndpoint: registryEndpoint, resource: resource, scope: scope, actions: actions, } } func (auth *RequestAuthorization) getToken() (string, error) { auth.tokenLock.Lock() defer auth.tokenLock.Unlock() now := time.Now() if now.Before(auth.tokenExpiration) { logrus.Debugf("Using cached token for %s", auth.authConfig.Username) return auth.tokenCache, nil } for _, challenge := range auth.registryEndpoint.AuthChallenges { switch strings.ToLower(challenge.Scheme) { case "basic": // no token necessary case "bearer": logrus.Debugf("Getting bearer token with %s for %s", challenge.Parameters, auth.authConfig.Username) params := map[string]string{} for k, v := range challenge.Parameters { params[k] = v } params["scope"] = fmt.Sprintf("%s:%s:%s", auth.resource, auth.scope, strings.Join(auth.actions, ",")) token, err := getToken(auth.authConfig.Username, auth.authConfig.Password, params, auth.registryEndpoint) if err != nil { return "", err } auth.tokenCache = token auth.tokenExpiration = now.Add(time.Minute) return token, nil default: logrus.Infof("Unsupported auth scheme: %q", challenge.Scheme) } } // Do not expire cache since there are no challenges which use a token auth.tokenExpiration = time.Now().Add(time.Hour * 24) return "", nil } // Checks that requests to the v2 registry can be authorized. func (auth *RequestAuthorization) CanAuthorizeV2() bool { if len(auth.registryEndpoint.AuthChallenges) == 0 { return true } scope := fmt.Sprintf("%s:%s:%s", auth.resource, auth.scope, strings.Join(auth.actions, ",")) if _, err := loginV2(auth.authConfig, auth.registryEndpoint, scope); err != nil { logrus.Debugf("Cannot authorize against V2 endpoint: %s", auth.registryEndpoint) return false } return true } func (auth *RequestAuthorization) Authorize(req *http.Request) error { token, err := auth.getToken() if err != nil { return err } if token != "" { req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token)) } else if auth.authConfig.Username != "" && auth.authConfig.Password != "" { req.SetBasicAuth(auth.authConfig.Username, auth.authConfig.Password) } return nil } // Login tries to register/login to the registry server. func Login(authConfig *cliconfig.AuthConfig, registryEndpoint *Endpoint) (string, error) { // Separates the v2 registry login logic from the v1 logic. if registryEndpoint.Version == APIVersion2 { return loginV2(authConfig, registryEndpoint, "" /* scope */) } return loginV1(authConfig, registryEndpoint) } // loginV1 tries to register/login to the v1 registry server. func loginV1(authConfig *cliconfig.AuthConfig, registryEndpoint *Endpoint) (string, error) { var ( status string reqBody []byte err error reqStatusCode = 0 serverAddress = authConfig.ServerAddress ) logrus.Debugf("attempting v1 login to registry endpoint %s", registryEndpoint) if serverAddress == "" { return "", fmt.Errorf("Server Error: Server Address not set.") } loginAgainstOfficialIndex := serverAddress == INDEXSERVER // to avoid sending the server address to the server it should be removed before being marshalled authCopy := *authConfig authCopy.ServerAddress = "" jsonBody, err := json.Marshal(authCopy) if err != nil { return "", fmt.Errorf("Config Error: %s", err) } // using `bytes.NewReader(jsonBody)` here causes the server to respond with a 411 status. b := strings.NewReader(string(jsonBody)) req1, err := registryEndpoint.client.Post(serverAddress+"users/", "application/json; charset=utf-8", b) if err != nil { return "", fmt.Errorf("Server Error: %s", err) } reqStatusCode = req1.StatusCode defer req1.Body.Close() reqBody, err = ioutil.ReadAll(req1.Body) if err != nil { return "", fmt.Errorf("Server Error: [%#v] %s", reqStatusCode, err) } if reqStatusCode == 201 { if loginAgainstOfficialIndex { status = "Account created. Please use the confirmation link we sent" + " to your e-mail to activate it." } else { // *TODO: Use registry configuration to determine what this says, if anything? status = "Account created. Please see the documentation of the registry " + serverAddress + " for instructions how to activate it." } } else if reqStatusCode == 400 { if string(reqBody) == "\"Username or email already exists\"" { req, err := http.NewRequest("GET", serverAddress+"users/", nil) req.SetBasicAuth(authConfig.Username, authConfig.Password) resp, err := registryEndpoint.client.Do(req) if err != nil { return "", err } defer resp.Body.Close() body, err := ioutil.ReadAll(resp.Body) if err != nil { return "", err } if resp.StatusCode == 200 { return "Login Succeeded", nil } else if resp.StatusCode == 401 { return "", fmt.Errorf("Wrong login/password, please try again") } else if resp.StatusCode == 403 { if loginAgainstOfficialIndex { return "", fmt.Errorf("Login: Account is not Active. Please check your e-mail for a confirmation link.") } // *TODO: Use registry configuration to determine what this says, if anything? return "", fmt.Errorf("Login: Account is not Active. Please see the documentation of the registry %s for instructions how to activate it.", serverAddress) } else if resp.StatusCode == 500 { // Issue #14326 logrus.Errorf("%s returned status code %d. Response Body :\n%s", req.URL.String(), resp.StatusCode, body) return "", fmt.Errorf("Internal Server Error") } return "", fmt.Errorf("Login: %s (Code: %d; Headers: %s)", body, resp.StatusCode, resp.Header) } return "", fmt.Errorf("Registration: %s", reqBody) } else if reqStatusCode == 401 { // This case would happen with private registries where /v1/users is // protected, so people can use `docker login` as an auth check. req, err := http.NewRequest("GET", serverAddress+"users/", nil) req.SetBasicAuth(authConfig.Username, authConfig.Password) resp, err := registryEndpoint.client.Do(req) if err != nil { return "", err } defer resp.Body.Close() body, err := ioutil.ReadAll(resp.Body) if err != nil { return "", err } if resp.StatusCode == 200 { return "Login Succeeded", nil } else if resp.StatusCode == 401 { return "", fmt.Errorf("Wrong login/password, please try again") } else { return "", fmt.Errorf("Login: %s (Code: %d; Headers: %s)", body, resp.StatusCode, resp.Header) } } else { return "", fmt.Errorf("Unexpected status code [%d] : %s", reqStatusCode, reqBody) } return status, nil } // loginV2 tries to login to the v2 registry server. The given registry endpoint has been // pinged or setup with a list of authorization challenges. Each of these challenges are // tried until one of them succeeds. Currently supported challenge schemes are: // HTTP Basic Authorization // Token Authorization with a separate token issuing server // NOTE: the v2 logic does not attempt to create a user account if one doesn't exist. For // now, users should create their account through other means like directly from a web page // served by the v2 registry service provider. Whether this will be supported in the future // is to be determined. func loginV2(authConfig *cliconfig.AuthConfig, registryEndpoint *Endpoint, scope string) (string, error) { logrus.Debugf("attempting v2 login to registry endpoint %s", registryEndpoint) var ( err error allErrors []error ) for _, challenge := range registryEndpoint.AuthChallenges { params := make(map[string]string, len(challenge.Parameters)+1) for k, v := range challenge.Parameters { params[k] = v } params["scope"] = scope logrus.Debugf("trying %q auth challenge with params %v", challenge.Scheme, params) switch strings.ToLower(challenge.Scheme) { case "basic": err = tryV2BasicAuthLogin(authConfig, params, registryEndpoint) case "bearer": err = tryV2TokenAuthLogin(authConfig, params, registryEndpoint) default: // Unsupported challenge types are explicitly skipped. err = fmt.Errorf("unsupported auth scheme: %q", challenge.Scheme) } if err == nil { return "Login Succeeded", nil } logrus.Debugf("error trying auth challenge %q: %s", challenge.Scheme, err) allErrors = append(allErrors, err) } return "", fmt.Errorf("no successful auth challenge for %s - errors: %s", registryEndpoint, allErrors) } func tryV2BasicAuthLogin(authConfig *cliconfig.AuthConfig, params map[string]string, registryEndpoint *Endpoint) error { req, err := http.NewRequest("GET", registryEndpoint.Path(""), nil) if err != nil { return err } req.SetBasicAuth(authConfig.Username, authConfig.Password) resp, err := registryEndpoint.client.Do(req) if err != nil { return err } defer resp.Body.Close() if resp.StatusCode != http.StatusOK { return fmt.Errorf("basic auth attempt to %s realm %q failed with status: %d %s", registryEndpoint, params["realm"], resp.StatusCode, http.StatusText(resp.StatusCode)) } return nil } func tryV2TokenAuthLogin(authConfig *cliconfig.AuthConfig, params map[string]string, registryEndpoint *Endpoint) error { token, err := getToken(authConfig.Username, authConfig.Password, params, registryEndpoint) if err != nil { return err } req, err := http.NewRequest("GET", registryEndpoint.Path(""), nil) if err != nil { return err } req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token)) resp, err := registryEndpoint.client.Do(req) if err != nil { return err } defer resp.Body.Close() if resp.StatusCode != http.StatusOK { return fmt.Errorf("token auth attempt to %s realm %q failed with status: %d %s", registryEndpoint, params["realm"], resp.StatusCode, http.StatusText(resp.StatusCode)) } return nil } // this method matches a auth configuration to a server address or a url func ResolveAuthConfig(config *cliconfig.ConfigFile, index *IndexInfo) cliconfig.AuthConfig { configKey := index.GetAuthConfigKey() // First try the happy case if c, found := config.AuthConfigs[configKey]; found || index.Official { return c } convertToHostname := func(url string) string { stripped := url if strings.HasPrefix(url, "http://") { stripped = strings.Replace(url, "http://", "", 1) } else if strings.HasPrefix(url, "https://") { stripped = strings.Replace(url, "https://", "", 1) } nameParts := strings.SplitN(stripped, "/", 2) return nameParts[0] } // Maybe they have a legacy config file, we will iterate the keys converting // them to the new format and testing for registry, ac := range config.AuthConfigs { if configKey == convertToHostname(registry) { return ac } } // When all else fails, return an empty auth config return cliconfig.AuthConfig{} }