256 lines
8.6 KiB
Go
256 lines
8.6 KiB
Go
package registry
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"net/http"
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"strings"
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"github.com/Sirupsen/logrus"
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"github.com/docker/engine-api/types"
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registrytypes "github.com/docker/engine-api/types/registry"
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)
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// Login tries to register/login to the registry server.
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func Login(authConfig *types.AuthConfig, registryEndpoint *Endpoint) (string, error) {
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// Separates the v2 registry login logic from the v1 logic.
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if registryEndpoint.Version == APIVersion2 {
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return loginV2(authConfig, registryEndpoint, "" /* scope */)
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}
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return loginV1(authConfig, registryEndpoint)
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}
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// loginV1 tries to register/login to the v1 registry server.
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func loginV1(authConfig *types.AuthConfig, registryEndpoint *Endpoint) (string, error) {
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var (
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status string
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respBody []byte
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err error
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respStatusCode = 0
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serverAddress = authConfig.ServerAddress
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)
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logrus.Debugf("attempting v1 login to registry endpoint %s", registryEndpoint)
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if serverAddress == "" {
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return "", fmt.Errorf("Server Error: Server Address not set.")
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}
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loginAgainstOfficialIndex := serverAddress == IndexServer
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// to avoid sending the server address to the server it should be removed before being marshaled
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authCopy := *authConfig
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authCopy.ServerAddress = ""
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jsonBody, err := json.Marshal(authCopy)
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if err != nil {
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return "", fmt.Errorf("Config Error: %s", err)
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}
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// using `bytes.NewReader(jsonBody)` here causes the server to respond with a 411 status.
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b := strings.NewReader(string(jsonBody))
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resp1, err := registryEndpoint.client.Post(serverAddress+"users/", "application/json; charset=utf-8", b)
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if err != nil {
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return "", fmt.Errorf("Server Error: %s", err)
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}
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defer resp1.Body.Close()
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respStatusCode = resp1.StatusCode
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respBody, err = ioutil.ReadAll(resp1.Body)
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if err != nil {
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return "", fmt.Errorf("Server Error: [%#v] %s", respStatusCode, err)
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}
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if respStatusCode == 201 {
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if loginAgainstOfficialIndex {
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status = "Account created. Please use the confirmation link we sent" +
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" to your e-mail to activate it."
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} else {
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// *TODO: Use registry configuration to determine what this says, if anything?
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status = "Account created. Please see the documentation of the registry " + serverAddress + " for instructions how to activate it."
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}
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} else if respStatusCode == 400 {
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if string(respBody) == "\"Username or email already exists\"" {
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req, err := http.NewRequest("GET", serverAddress+"users/", nil)
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req.SetBasicAuth(authConfig.Username, authConfig.Password)
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resp, err := registryEndpoint.client.Do(req)
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if err != nil {
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return "", err
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}
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defer resp.Body.Close()
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return "", err
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}
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if resp.StatusCode == 200 {
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return "Login Succeeded", nil
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} else if resp.StatusCode == 401 {
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return "", fmt.Errorf("Wrong login/password, please try again")
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} else if resp.StatusCode == 403 {
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if loginAgainstOfficialIndex {
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return "", fmt.Errorf("Login: Account is not Active. Please check your e-mail for a confirmation link.")
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}
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// *TODO: Use registry configuration to determine what this says, if anything?
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return "", fmt.Errorf("Login: Account is not Active. Please see the documentation of the registry %s for instructions how to activate it.", serverAddress)
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} else if resp.StatusCode == 500 { // Issue #14326
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logrus.Errorf("%s returned status code %d. Response Body :\n%s", req.URL.String(), resp.StatusCode, body)
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return "", fmt.Errorf("Internal Server Error")
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}
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return "", fmt.Errorf("Login: %s (Code: %d; Headers: %s)", body, resp.StatusCode, resp.Header)
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}
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return "", fmt.Errorf("Registration: %s", respBody)
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} else if respStatusCode == 401 {
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// This case would happen with private registries where /v1/users is
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// protected, so people can use `docker login` as an auth check.
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req, err := http.NewRequest("GET", serverAddress+"users/", nil)
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req.SetBasicAuth(authConfig.Username, authConfig.Password)
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resp, err := registryEndpoint.client.Do(req)
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if err != nil {
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return "", err
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}
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defer resp.Body.Close()
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return "", err
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}
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if resp.StatusCode == 200 {
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return "Login Succeeded", nil
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} else if resp.StatusCode == 401 {
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return "", fmt.Errorf("Wrong login/password, please try again")
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} else {
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return "", fmt.Errorf("Login: %s (Code: %d; Headers: %s)", body,
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resp.StatusCode, resp.Header)
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}
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} else {
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return "", fmt.Errorf("Unexpected status code [%d] : %s", respStatusCode, respBody)
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}
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return status, nil
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}
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// loginV2 tries to login to the v2 registry server. The given registry endpoint has been
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// pinged or setup with a list of authorization challenges. Each of these challenges are
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// tried until one of them succeeds. Currently supported challenge schemes are:
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// HTTP Basic Authorization
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// Token Authorization with a separate token issuing server
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// NOTE: the v2 logic does not attempt to create a user account if one doesn't exist. For
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// now, users should create their account through other means like directly from a web page
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// served by the v2 registry service provider. Whether this will be supported in the future
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// is to be determined.
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func loginV2(authConfig *types.AuthConfig, registryEndpoint *Endpoint, scope string) (string, error) {
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logrus.Debugf("attempting v2 login to registry endpoint %s", registryEndpoint)
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var (
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err error
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allErrors []error
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)
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for _, challenge := range registryEndpoint.AuthChallenges {
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params := make(map[string]string, len(challenge.Parameters)+1)
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for k, v := range challenge.Parameters {
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params[k] = v
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}
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params["scope"] = scope
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logrus.Debugf("trying %q auth challenge with params %v", challenge.Scheme, params)
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switch strings.ToLower(challenge.Scheme) {
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case "basic":
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err = tryV2BasicAuthLogin(authConfig, params, registryEndpoint)
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case "bearer":
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err = tryV2TokenAuthLogin(authConfig, params, registryEndpoint)
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default:
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// Unsupported challenge types are explicitly skipped.
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err = fmt.Errorf("unsupported auth scheme: %q", challenge.Scheme)
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}
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if err == nil {
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return "Login Succeeded", nil
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}
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logrus.Debugf("error trying auth challenge %q: %s", challenge.Scheme, err)
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allErrors = append(allErrors, err)
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}
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return "", fmt.Errorf("no successful auth challenge for %s - errors: %s", registryEndpoint, allErrors)
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}
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func tryV2BasicAuthLogin(authConfig *types.AuthConfig, params map[string]string, registryEndpoint *Endpoint) error {
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req, err := http.NewRequest("GET", registryEndpoint.Path(""), nil)
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if err != nil {
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return err
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}
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req.SetBasicAuth(authConfig.Username, authConfig.Password)
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resp, err := registryEndpoint.client.Do(req)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return fmt.Errorf("basic auth attempt to %s realm %q failed with status: %d %s", registryEndpoint, params["realm"], resp.StatusCode, http.StatusText(resp.StatusCode))
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}
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return nil
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}
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func tryV2TokenAuthLogin(authConfig *types.AuthConfig, params map[string]string, registryEndpoint *Endpoint) error {
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token, err := getToken(authConfig.Username, authConfig.Password, params, registryEndpoint)
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if err != nil {
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return err
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}
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req, err := http.NewRequest("GET", registryEndpoint.Path(""), nil)
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if err != nil {
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return err
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}
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req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
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resp, err := registryEndpoint.client.Do(req)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return fmt.Errorf("token auth attempt to %s realm %q failed with status: %d %s", registryEndpoint, params["realm"], resp.StatusCode, http.StatusText(resp.StatusCode))
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}
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return nil
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}
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// ResolveAuthConfig matches an auth configuration to a server address or a URL
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func ResolveAuthConfig(authConfigs map[string]types.AuthConfig, index *registrytypes.IndexInfo) types.AuthConfig {
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configKey := GetAuthConfigKey(index)
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// First try the happy case
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if c, found := authConfigs[configKey]; found || index.Official {
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return c
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}
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convertToHostname := func(url string) string {
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stripped := url
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if strings.HasPrefix(url, "http://") {
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stripped = strings.Replace(url, "http://", "", 1)
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} else if strings.HasPrefix(url, "https://") {
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stripped = strings.Replace(url, "https://", "", 1)
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}
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nameParts := strings.SplitN(stripped, "/", 2)
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return nameParts[0]
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}
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// Maybe they have a legacy config file, we will iterate the keys converting
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// them to the new format and testing
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for registry, ac := range authConfigs {
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if configKey == convertToHostname(registry) {
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return ac
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}
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}
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// When all else fails, return an empty auth config
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return types.AuthConfig{}
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}
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