forked from digitalocean/doctl
/
auth.go
251 lines (199 loc) · 5.22 KB
/
auth.go
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/*
Copyright 2016 The Doctl Authors All rights reserved.
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 commands
import (
"bufio"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"os"
"runtime"
"golang.org/x/crypto/ssh/terminal"
"github.com/bryanl/doit-server"
"github.com/bryanl/webbrowser"
"github.com/gorilla/websocket"
"github.com/satori/go.uuid"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
// ErrUnknownTerminal signies an unknown terminal. It is returned when doit
// can't ascertain the current terminal type with requesting an auth token.
var ErrUnknownTerminal = errors.New("unknown terminal")
// UnknownSchemeError signifies an unknown HTTP scheme.
type UnknownSchemeError struct {
Scheme string
}
var _ error = &UnknownSchemeError{}
func (use *UnknownSchemeError) Error() string {
return "unknown scheme: " + use.Scheme
}
// Auth creates auth commands for doctl.
func Auth() *Command {
cmd := &Command{
Command: &cobra.Command{
Use: "auth",
Short: "auth commands",
Long: "auth is used to access auth commands",
},
}
CmdBuilder(cmd, RunAuthLogin, "login", "login to DigitalOcean account", Writer, docCategories("account"))
return cmd
}
// RunAuthLogin runs auth login. It communicates with doit-server to perform auth.
func RunAuthLogin(c *CmdConfig) error {
dsa := newDoitServerAuth()
ac, err := dsa.retrieveAuthCredentials()
if err != nil {
return err
}
token, err := dsa.initAuth(ac)
if err != nil {
return err
}
viper.Set("access-token", token)
fmt.Println("updated access token")
return nil
}
type doitServerAuth struct {
url string
browserOpen func(u string) error
isCLI func() bool
monitorAuth func(u string, ac *doitserver.AuthCredentials) (*doitserver.TokenResponse, error)
}
func newDoitServerAuth() *doitServerAuth {
return &doitServerAuth{
url: "http://doit-server.apps.pifft.com",
browserOpen: func(u string) error {
return webbrowser.Open(u, webbrowser.NewTab, true)
},
isCLI: func() bool {
return (runtime.GOOS == "linux" && os.Getenv("DISPLAY") == "") || os.Getenv("CLIAUTH") != ""
},
monitorAuth: monitorAuthWS,
}
}
func (dsa *doitServerAuth) initAuth(ac *doitserver.AuthCredentials) (string, error) {
if dsa.isCLI() {
return dsa.initAuthCLI(ac)
}
return dsa.initAuthBrowser(ac)
}
func (dsa *doitServerAuth) initAuthCLI(ac *doitserver.AuthCredentials) (string, error) {
if !terminal.IsTerminal(int(os.Stdout.Fd())) {
return "", ErrUnknownTerminal
}
u, err := dsa.createAuthURL(ac, keyPair{k: "cliauth", v: "1"})
if err != nil {
return "", err
}
fmt.Printf("Visit the following URL in your browser: %s\n", u)
reader := bufio.NewReader(os.Stdin)
fmt.Print("Enter token: ")
return reader.ReadString('\n')
}
func (dsa *doitServerAuth) initAuthBrowser(ac *doitserver.AuthCredentials) (string, error) {
u, err := dsa.createAuthURL(ac)
if err != nil {
return "", err
}
err = dsa.browserOpen(u)
if err != nil {
return "", err
}
tr, err := dsa.monitorAuth(dsa.url, ac)
if err != nil {
return "", err
}
return tr.AccessToken, nil
}
func (dsa *doitServerAuth) retrieveAuthCredentials() (*doitserver.AuthCredentials, error) {
u, err := url.Parse(dsa.url)
if err != nil {
return nil, err
}
u.Path = "/token"
v := u.Query()
v.Set("id", uuid.NewV4().String())
u.RawQuery = v.Encode()
r, err := http.Get(u.String())
if err != nil {
return nil, err
}
defer r.Body.Close()
if err != nil {
return nil, err
}
body, err := ioutil.ReadAll(r.Body)
if err != nil {
return nil, err
}
if r.StatusCode != 200 {
return nil, errors.New("it's broke, Jim")
}
var m doitserver.AuthCredentials
err = json.Unmarshal(body, &m)
if err != nil {
return nil, err
}
return &m, nil
}
type keyPair struct {
k, v string
}
func (dsa *doitServerAuth) createAuthURL(ac *doitserver.AuthCredentials, kps ...keyPair) (string, error) {
authURL, err := url.Parse(dsa.url)
if err != nil {
return "", err
}
authURL.Path = "/auth/digitalocean"
q := authURL.Query()
q.Set("id", ac.ID)
q.Set("cs", ac.CS)
for _, kp := range kps {
q.Set(kp.k, kp.v)
}
authURL.RawQuery = q.Encode()
return authURL.String(), nil
}
func monitorAuthWS(serverURL string, ac *doitserver.AuthCredentials) (*doitserver.TokenResponse, error) {
u, err := url.Parse(serverURL)
if err != nil {
return nil, err
}
switch u.Scheme {
case "http":
u.Scheme = "ws"
case "https":
u.Scheme = "wss"
default:
return nil, &UnknownSchemeError{Scheme: u.Scheme}
}
u.Path = "/status"
conn, _, err := websocket.DefaultDialer.Dial(u.String(), nil)
if err != nil {
return nil, err
}
err = conn.WriteJSON(ac)
if err != nil {
return nil, err
}
var tr doitserver.TokenResponse
err = conn.ReadJSON(&tr)
if err != nil {
return nil, err
}
return &tr, nil
}