package registry
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"strings"
"github.com/Sirupsen/logrus"
"github.com/docker/engine-api/types"
registrytypes "github.com/docker/engine-api/types/registry"
)
// Login tries to register/login to the registry server.
func Login(authConfig *types.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 *types.AuthConfig, registryEndpoint *Endpoint) (string, error) {
var (
status string
respBody []byte
err error
respStatusCode = 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 marshaled
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))
resp1, err := registryEndpoint.client.Post(serverAddress+"users/", "application/json; charset=utf-8", b)
if err != nil {
return "", fmt.Errorf("Server Error: %s", err)
}
defer resp1.Body.Close()
respStatusCode = resp1.StatusCode
respBody, err = ioutil.ReadAll(resp1.Body)
if err != nil {
return "", fmt.Errorf("Server Error: [%#v] %s", respStatusCode, err)
}
if respStatusCode == 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 respStatusCode == 400 {
if string(respBody) == "\"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", respBody)
} else if respStatusCode == 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", respStatusCode, respBody)
}
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 *types.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 *types.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 *types.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
}
// ResolveAuthConfig matches an auth configuration to a server address or a URL
func ResolveAuthConfig(authConfigs map[string]types.AuthConfig, index *registrytypes.IndexInfo) types.AuthConfig {
configKey := GetAuthConfigKey(index)
// First try the happy case
if c, found := 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 authConfigs {
if configKey == convertToHostname(registry) {
return ac
}
}
// When all else fails, return an empty auth config
return types.AuthConfig{}
}