package auth import ( "encoding/base64" "encoding/json" "errors" "fmt" "github.com/dotcloud/docker/utils" "io/ioutil" "net/http" "os" "path" "strings" ) // Where we store the config file const CONFIGFILE = ".dockercfg" // Only used for user auth + account creation const INDEXSERVER = "https://index.docker.io/v1/" //const INDEXSERVER = "https://indexstaging-docker.dotcloud.com/v1/" var ( ErrConfigFileMissing = errors.New("The Auth config file is missing") ) type AuthConfig struct { Username string `json:"username,omitempty"` Password string `json:"password,omitempty"` Auth string `json:"auth"` Email string `json:"email"` ServerAddress string `json:"serveraddress,omitempty"` } type ConfigFile struct { Configs map[string]AuthConfig `json:"configs,omitempty"` rootPath string } func IndexServerAddress() string { return INDEXSERVER } // create a base64 encoded auth string to store in config func encodeAuth(authConfig *AuthConfig) string { authStr := authConfig.Username + ":" + authConfig.Password msg := []byte(authStr) encoded := make([]byte, base64.StdEncoding.EncodedLen(len(msg))) base64.StdEncoding.Encode(encoded, msg) return string(encoded) } // decode the auth string func decodeAuth(authStr string) (string, string, error) { decLen := base64.StdEncoding.DecodedLen(len(authStr)) decoded := make([]byte, decLen) authByte := []byte(authStr) n, err := base64.StdEncoding.Decode(decoded, authByte) if err != nil { return "", "", err } if n > decLen { return "", "", fmt.Errorf("Something went wrong decoding auth config") } arr := strings.SplitN(string(decoded), ":", 2) if len(arr) != 2 { return "", "", fmt.Errorf("Invalid auth configuration file") } password := strings.Trim(arr[1], "\x00") return arr[0], password, nil } // load up the auth config information and return values // FIXME: use the internal golang config parser func LoadConfig(rootPath string) (*ConfigFile, error) { configFile := ConfigFile{Configs: make(map[string]AuthConfig), rootPath: rootPath} confFile := path.Join(rootPath, CONFIGFILE) if _, err := os.Stat(confFile); err != nil { return &configFile, nil //missing file is not an error } b, err := ioutil.ReadFile(confFile) if err != nil { return &configFile, err } if err := json.Unmarshal(b, &configFile.Configs); err != nil { arr := strings.Split(string(b), "\n") if len(arr) < 2 { return &configFile, fmt.Errorf("The Auth config file is empty") } authConfig := AuthConfig{} origAuth := strings.Split(arr[0], " = ") if len(origAuth) != 2 { return &configFile, fmt.Errorf("Invalid Auth config file") } authConfig.Username, authConfig.Password, err = decodeAuth(origAuth[1]) if err != nil { return &configFile, err } origEmail := strings.Split(arr[1], " = ") if len(origEmail) != 2 { return &configFile, fmt.Errorf("Invalid Auth config file") } authConfig.Email = origEmail[1] authConfig.ServerAddress = IndexServerAddress() configFile.Configs[IndexServerAddress()] = authConfig } else { for k, authConfig := range configFile.Configs { authConfig.Username, authConfig.Password, err = decodeAuth(authConfig.Auth) if err != nil { return &configFile, err } authConfig.Auth = "" configFile.Configs[k] = authConfig authConfig.ServerAddress = k } } return &configFile, nil } // save the auth config func SaveConfig(configFile *ConfigFile) error { confFile := path.Join(configFile.rootPath, CONFIGFILE) if len(configFile.Configs) == 0 { os.Remove(confFile) return nil } configs := make(map[string]AuthConfig, len(configFile.Configs)) for k, authConfig := range configFile.Configs { authCopy := authConfig authCopy.Auth = encodeAuth(&authCopy) authCopy.Username = "" authCopy.Password = "" authCopy.ServerAddress = "" configs[k] = authCopy } b, err := json.Marshal(configs) if err != nil { return err } err = ioutil.WriteFile(confFile, b, 0600) if err != nil { return err } return nil } // try to register/login to the registry server func Login(authConfig *AuthConfig, factory *utils.HTTPRequestFactory) (string, error) { var ( status string reqBody []byte err error client = &http.Client{} reqStatusCode = 0 serverAddress = authConfig.ServerAddress ) if serverAddress == "" { serverAddress = IndexServerAddress() } loginAgainstOfficialIndex := serverAddress == IndexServerAddress() // 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 := http.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 { 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 := factory.NewRequest("GET", serverAddress+"users/", nil) req.SetBasicAuth(authConfig.Username, authConfig.Password) resp, err := 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 { status = "Login Succeeded" } 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.") } return "", fmt.Errorf("Login: Account is not Active. Please see the documentation of the registry %s for instructions how to activate it.", serverAddress) } else { return "", fmt.Errorf("Login: %s (Code: %d; Headers: %s)", body, resp.StatusCode, resp.Header) } } else { 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 := factory.NewRequest("GET", serverAddress+"users/", nil) req.SetBasicAuth(authConfig.Username, authConfig.Password) resp, err := 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 { status = "Login Succeeded" } 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 } // this method matches a auth configuration to a server address or a url func (config *ConfigFile) ResolveAuthConfig(registry string) AuthConfig { if registry == IndexServerAddress() || len(registry) == 0 { // default to the index server return config.Configs[IndexServerAddress()] } // if it's not the index server there are three cases: // // 1. a full config url -> it should be used as is // 2. a full url, but with the wrong protocol // 3. a hostname, with an optional port // // as there is only one auth entry which is fully qualified we need to start // parsing and matching swapProtocol := func(url string) string { if strings.HasPrefix(url, "http:") { return strings.Replace(url, "http:", "https:", 1) } if strings.HasPrefix(url, "https:") { return strings.Replace(url, "https:", "http:", 1) } return url } resolveIgnoringProtocol := func(url string) AuthConfig { if c, found := config.Configs[url]; found { return c } registrySwappedProtocol := swapProtocol(url) // now try to match with the different protocol if c, found := config.Configs[registrySwappedProtocol]; found { return c } return AuthConfig{} } // match both protocols as it could also be a server name like httpfoo if strings.HasPrefix(registry, "http:") || strings.HasPrefix(registry, "https:") { return resolveIgnoringProtocol(registry) } url := "https://" + registry if !strings.Contains(registry, "/") { url = url + "/v1/" } return resolveIgnoringProtocol(url) }