package main import ( "bufio" "context" "fmt" "os" "strings" "github.com/containers/image/docker" "github.com/containers/image/pkg/docker/config" "github.com/projectatomic/libpod/libpod/common" "github.com/pkg/errors" "github.com/urfave/cli" "golang.org/x/crypto/ssh/terminal" ) var ( loginFlags = []cli.Flag{ cli.StringFlag{ Name: "password, p", Usage: "Password for registry", }, cli.StringFlag{ Name: "username, u", Usage: "Username for registry", }, cli.StringFlag{ Name: "authfile", Usage: "Path of the authentication file. Default is ${XDG_RUNTIME_DIR}/containers/auth.json", }, } loginDescription = "Login to a container registry on a specified server." loginCommand = cli.Command{ Name: "login", Usage: "login to a container registry", Description: loginDescription, Flags: loginFlags, Action: loginCmd, ArgsUsage: "REGISTRY", } ) // loginCmd uses the authentication package to store a user's authenticated credentials // in an auth.json file for future use func loginCmd(c *cli.Context) error { args := c.Args() if len(args) > 1 { return errors.Errorf("too many arguments, login takes only 1 argument") } if len(args) == 0 { return errors.Errorf("registry must be given") } var server string if len(args) == 1 { server = args[0] } sc := common.GetSystemContext("", c.String("authfile")) // username of user logged in to server (if one exists) userFromAuthFile := config.GetUserLoggedIn(sc, server) username, password, err := getUserAndPass(c.String("username"), c.String("password"), userFromAuthFile) if err != nil { return errors.Wrapf(err, "error getting username and password") } if err = docker.CheckAuth(context.TODO(), sc, username, password, server); err == nil { if err := config.SetAuthentication(sc, server, username, password); err != nil { return err } } switch err { case nil: fmt.Println("Login Succeeded!") return nil case docker.ErrUnauthorizedForCredentials: return errors.Errorf("error logging into %q: invalid username/password\n", server) default: return errors.Wrapf(err, "error authenticating creds for %q", server) } } // getUserAndPass gets the username and password from STDIN if not given // using the -u and -p flags func getUserAndPass(username, password, userFromAuthFile string) (string, string, error) { var err error reader := bufio.NewReader(os.Stdin) if username == "" { if userFromAuthFile != "" { fmt.Printf("Username (%s): ", userFromAuthFile) } else { fmt.Print("Username: ") } username, err = reader.ReadString('\n') if err != nil { return "", "", errors.Wrapf(err, "error reading username") } } if password == "" { fmt.Print("Password: ") pass, err := terminal.ReadPassword(0) if err != nil { return "", "", errors.Wrapf(err, "error reading password") } password = string(pass) fmt.Println() } return strings.TrimSpace(username), password, err }