package proxy import ( "net/http" "net/url" "strings" "github.com/docker/distribution/context" "github.com/docker/distribution/registry/client/auth" "github.com/docker/distribution/registry/client/auth/challenge" ) const challengeHeader = "Docker-Distribution-Api-Version" type userpass struct { username string password string } type credentials struct { creds map[string]userpass } func (c credentials) Basic(u *url.URL) (string, string) { up := c.creds[u.String()] return up.username, up.password } func (c credentials) RefreshToken(u *url.URL, service string) string { return "" } func (c credentials) SetRefreshToken(u *url.URL, service, token string) { } // configureAuth stores credentials for challenge responses func configureAuth(username, password, remoteURL string) (auth.CredentialStore, error) { creds := map[string]userpass{} authURLs, err := getAuthURLs(remoteURL) if err != nil { return nil, err } for _, url := range authURLs { context.GetLogger(context.Background()).Infof("Discovered token authentication URL: %s", url) creds[url] = userpass{ username: username, password: password, } } return credentials{creds: creds}, nil } func getAuthURLs(remoteURL string) ([]string, error) { authURLs := []string{} resp, err := http.Get(remoteURL + "/v2/") if err != nil { return nil, err } defer resp.Body.Close() for _, c := range challenge.ResponseChallenges(resp) { if strings.EqualFold(c.Scheme, "bearer") { authURLs = append(authURLs, c.Parameters["realm"]) } } return authURLs, nil } func ping(manager challenge.Manager, endpoint, versionHeader string) error { resp, err := http.Get(endpoint) if err != nil { return err } defer resp.Body.Close() if err := manager.AddResponse(resp); err != nil { return err } return nil }