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// Copyright 2021 Northern.tech AS
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"bufio"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/howeyc/gopass"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"github.com/spf13/viper"
"github.com/mendersoftware/mender-cli/client/useradm"
"github.com/mendersoftware/mender-cli/log"
)
const (
argLoginUsername = "username"
argLoginPassword = "password"
argLoginToken = "2fa-code"
)
var loginCmd = &cobra.Command{
Use: "login",
Short: "Log in to the Mender server (required before other operations).",
Run: func(c *cobra.Command, args []string) {
cmd, err := NewLoginCmd(c, args)
CheckErr(err)
CheckErr(cmd.Run())
},
}
func init() {
loginCmd.Flags().
StringP(argLoginUsername, "", "", "username, format: email (will prompt if not provided)")
loginCmd.Flags().StringP(argLoginPassword, "", "", "password (will prompt if not provided)")
loginCmd.Flags().StringP(argLoginToken, "", "", "two-factor authentication token")
_ = viper.BindPFlag(argLoginUsername, loginCmd.Flags().Lookup(argLoginUsername))
_ = viper.BindPFlag(argLoginPassword, loginCmd.Flags().Lookup(argLoginPassword))
}
type LoginCmd struct {
server string
skipVerify bool
username string
password string
token string
tokenPath string
}
func NewLoginCmd(cmd *cobra.Command, args []string) (*LoginCmd, error) {
server := viper.GetString(argRootServer)
if server == "" {
return nil, errors.New("No server, this should not happen")
}
skipVerify, err := cmd.Flags().GetBool(argRootSkipVerify)
if err != nil {
return nil, err
}
username := viper.GetString(argLoginUsername)
password := viper.GetString(argLoginPassword)
tfaToken, err := cmd.Flags().GetString(argLoginToken)
if err != nil {
return nil, err
}
token, err := cmd.Flags().GetString(argRootToken)
if err != nil {
return nil, err
}
if token == "" {
token, err = getDefaultAuthTokenPath()
if err != nil {
return nil, err
}
}
return &LoginCmd{
server: server,
username: username,
password: password,
token: tfaToken,
tokenPath: token,
skipVerify: skipVerify,
}, nil
}
func (c *LoginCmd) Run() error {
err := c.maybeGetUsername()
if err != nil {
return err
}
err = c.maybeGetPassword()
if err != nil {
return err
}
client := useradm.NewClient(c.server, c.skipVerify)
res, err := client.Login(c.username, c.password, c.token)
if err != nil {
return err
}
err = c.saveToken(res)
if err != nil {
return err
}
return nil
}
func (c *LoginCmd) maybeGetUsername() error {
if c.username == "" {
fmt.Printf("Username: ")
reader := bufio.NewReader(os.Stdin)
str, err := reader.ReadString('\n')
if err != nil {
return err
}
c.username = strings.TrimSuffix(str, "\n")
}
return nil
}
func (c *LoginCmd) maybeGetPassword() error {
if c.password == "" {
fmt.Printf("Password: ")
p, err := gopass.GetPasswdMasked()
if err != nil {
return err
}
c.password = string(p)
}
return nil
}
func (c *LoginCmd) saveToken(t []byte) error {
dir := filepath.Dir(c.tokenPath)
log.Verbf("creating directory: %v\n", dir)
err := os.MkdirAll(dir, os.ModeDir|0700)
if err != nil {
return errors.Wrapf(err, "failed to create directory %s", dir)
}
err = ioutil.WriteFile(c.tokenPath, t, 0600)
if err != nil {
return errors.Wrapf(err, "failed to create file %s", c.tokenPath)
}
log.Verb("saved token to: " + c.tokenPath)
log.Info("login successful")
return nil
}
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