360 lines
9.6 KiB
Go
360 lines
9.6 KiB
Go
package login
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"log"
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"math/rand"
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"net/http"
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"net/http/httputil"
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"net/url"
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"os"
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"os/exec"
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"os/signal"
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"path/filepath"
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"runtime"
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"strconv"
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"strings"
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"syscall"
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"time"
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"github.com/docker/api/errdefs"
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"github.com/Azure/go-autorest/autorest"
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"github.com/Azure/go-autorest/autorest/adal"
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"github.com/Azure/go-autorest/autorest/azure/cli"
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"github.com/Azure/go-autorest/autorest/date"
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"golang.org/x/oauth2"
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"github.com/pkg/errors"
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)
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func init() {
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rand.Seed(time.Now().Unix())
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}
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//go login process, derived from code sample provided by MS at https://github.com/devigned/go-az-cli-stuff
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const (
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authorizeFormat = "https://login.microsoftonline.com/organizations/oauth2/v2.0/authorize?response_type=code&client_id=%s&redirect_uri=%s&state=%s&prompt=select_account&response_mode=query&scope=%s"
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tokenEndpoint = "https://login.microsoftonline.com/%s/oauth2/v2.0/token"
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// scopes for a multi-tenant app works for openid, email, other common scopes, but fails when trying to add a token
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// v1 scope like "https://management.azure.com/.default" for ARM access
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scopes = "offline_access https://management.azure.com/.default"
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clientID = "04b07795-8ddb-461a-bbee-02f9e1bf7b46" // Azure CLI client id
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)
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type (
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azureToken struct {
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Type string `json:"token_type"`
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Scope string `json:"scope"`
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ExpiresIn int `json:"expires_in"`
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ExtExpiresIn int `json:"ext_expires_in"`
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AccessToken string `json:"access_token"`
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RefreshToken string `json:"refresh_token"`
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Foci string `json:"foci"`
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}
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tenantResult struct {
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Value []tenantValue `json:"value"`
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}
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tenantValue struct {
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TenantID string `json:"tenantId"`
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}
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)
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// AzureLoginService Service to log into azure and get authentifier for azure APIs
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type AzureLoginService struct {
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tokenStore tokenStore
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apiHelper apiHelper
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}
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const tokenFilename = "dockerAccessToken.json"
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func getTokenStorePath() string {
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cliPath, _ := cli.AccessTokensPath()
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return filepath.Join(filepath.Dir(cliPath), tokenFilename)
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}
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// NewAzureLoginService creates a NewAzureLoginService
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func NewAzureLoginService() AzureLoginService {
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return newAzureLoginServiceFromPath(getTokenStorePath(), azureAPIHelper{})
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}
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func newAzureLoginServiceFromPath(tokenStorePath string, helper apiHelper) AzureLoginService {
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return AzureLoginService{
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tokenStore: tokenStore{
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filePath: tokenStorePath,
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},
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apiHelper: helper,
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}
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}
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type apiHelper interface {
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queryToken(data url.Values, tenantID string) (token azureToken, err error)
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}
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type azureAPIHelper struct{}
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//Login perform azure login through browser
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func (login AzureLoginService) Login() error {
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sigs := make(chan os.Signal, 1)
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signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
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queryCh := make(chan url.Values, 1)
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mux := http.NewServeMux()
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mux.HandleFunc("/", queryHandler(queryCh))
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server := &http.Server{Addr: ":8401", Handler: mux}
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go func() {
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if err := server.ListenAndServe(); err != nil {
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queryCh <- url.Values{
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"error": []string{fmt.Sprintf("error starting http server with: %v", err)},
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}
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}
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}()
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state := randomString("", 10)
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authURL := fmt.Sprintf(authorizeFormat, clientID, "http://localhost:8401", state, scopes)
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openbrowser(authURL)
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select {
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case <-sigs:
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return nil
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case qsValues := <-queryCh:
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errorMsg, hasError := qsValues["error"]
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if hasError {
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return fmt.Errorf("login failed : %s", errorMsg)
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}
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code, hasCode := qsValues["code"]
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if !hasCode {
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return errdefs.ErrLoginFailed
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}
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data := url.Values{
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"grant_type": []string{"authorization_code"},
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"client_id": []string{clientID},
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"code": code,
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"scope": []string{scopes},
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"redirect_uri": []string{"http://localhost:8401"},
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}
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token, err := login.apiHelper.queryToken(data, "organizations")
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if err != nil {
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return errors.Wrap(err, "Access token request failed")
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}
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req, err := http.NewRequest(http.MethodGet, "https://management.azure.com/tenants?api-version=2019-11-01", nil)
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if err != nil {
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return err
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}
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req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", token.AccessToken))
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res, err := http.DefaultClient.Do(req)
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if err != nil {
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return errors.Wrap(err, "login failed")
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}
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bits, err := ioutil.ReadAll(res.Body)
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if err != nil {
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return errors.Wrap(err, "login failed")
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}
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if res.StatusCode == 200 {
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var tenantResult tenantResult
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if err := json.Unmarshal(bits, &tenantResult); err != nil {
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return errors.Wrap(err, "login failed")
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}
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tenantID := tenantResult.Value[0].TenantID
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tenantToken, err := login.refreshToken(token.RefreshToken, tenantID)
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if err != nil {
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return errors.Wrap(err, "login failed")
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}
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loginInfo := TokenInfo{TenantID: tenantID, Token: tenantToken}
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err = login.tokenStore.writeLoginInfo(loginInfo)
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if err != nil {
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return errors.Wrap(err, "login failed")
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}
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fmt.Println("Login Succeeded")
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return nil
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}
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bits, err = httputil.DumpResponse(res, true)
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if err != nil {
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return errors.Wrap(err, "login failed")
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}
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return fmt.Errorf("login failed: \n" + string(bits))
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}
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}
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func queryHandler(queryCh chan url.Values) func(w http.ResponseWriter, r *http.Request) {
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queryHandler := func(w http.ResponseWriter, r *http.Request) {
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_, hasCode := r.URL.Query()["code"]
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if hasCode {
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_, err := w.Write([]byte(successfullLoginHTML))
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if err != nil {
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queryCh <- url.Values{
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"error": []string{err.Error()},
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}
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} else {
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queryCh <- r.URL.Query()
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}
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} else {
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_, err := w.Write([]byte(loginFailedHTML))
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if err != nil {
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queryCh <- url.Values{
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"error": []string{err.Error()},
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}
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} else {
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queryCh <- r.URL.Query()
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}
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}
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}
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return queryHandler
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}
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func (helper azureAPIHelper) queryToken(data url.Values, tenantID string) (token azureToken, err error) {
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res, err := http.Post(fmt.Sprintf(tokenEndpoint, tenantID), "application/x-www-form-urlencoded", strings.NewReader(data.Encode()))
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if err != nil {
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return token, err
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}
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if res.StatusCode != 200 {
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return token, errors.Errorf("error while renewing access token, status : %s", res.Status)
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}
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bits, err := ioutil.ReadAll(res.Body)
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if err != nil {
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return token, err
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}
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if err := json.Unmarshal(bits, &token); err != nil {
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return token, err
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}
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return token, nil
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}
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func toOAuthToken(token azureToken) oauth2.Token {
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expireTime := time.Now().Add(time.Duration(token.ExpiresIn) * time.Second)
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oauthToken := oauth2.Token{
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RefreshToken: token.RefreshToken,
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AccessToken: token.AccessToken,
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Expiry: expireTime,
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TokenType: token.Type,
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}
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return oauthToken
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}
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// NewAuthorizerFromLogin creates an authorizer based on login access token
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func (login AzureLoginService) NewAuthorizerFromLogin() (autorest.Authorizer, error) {
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oauthToken, err := login.GetValidToken()
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if err != nil {
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return nil, err
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}
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token := adal.Token{
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AccessToken: oauthToken.AccessToken,
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Type: oauthToken.TokenType,
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ExpiresIn: json.Number(strconv.Itoa(int(oauthToken.Expiry.Sub(time.Now()).Seconds()))),
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ExpiresOn: json.Number(strconv.Itoa(int(oauthToken.Expiry.Sub(date.UnixEpoch()).Seconds()))),
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RefreshToken: "",
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Resource: "",
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}
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return autorest.NewBearerAuthorizer(&token), nil
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}
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// GetValidToken returns an access token. Refresh token if needed
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func (login AzureLoginService) GetValidToken() (token oauth2.Token, err error) {
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loginInfo, err := login.tokenStore.readToken()
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if err != nil {
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return token, err
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}
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token = loginInfo.Token
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if token.Valid() {
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return token, nil
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}
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tenantID := loginInfo.TenantID
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token, err = login.refreshToken(token.RefreshToken, tenantID)
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if err != nil {
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return token, errors.Wrap(err, "access token request failed. Maybe you need to login to azure again.")
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}
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err = login.tokenStore.writeLoginInfo(TokenInfo{TenantID: tenantID, Token: token})
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if err != nil {
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return token, err
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}
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return token, nil
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}
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func (login AzureLoginService) refreshToken(currentRefreshToken string, tenantID string) (oauthToken oauth2.Token, err error) {
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data := url.Values{
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"grant_type": []string{"refresh_token"},
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"client_id": []string{clientID},
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"scope": []string{scopes},
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"refresh_token": []string{currentRefreshToken},
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}
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token, err := login.apiHelper.queryToken(data, tenantID)
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if err != nil {
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return oauthToken, err
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}
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return toOAuthToken(token), nil
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}
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func openbrowser(url string) {
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var err error
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switch runtime.GOOS {
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case "linux":
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err = exec.Command("xdg-open", url).Start()
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case "windows":
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err = exec.Command("rundll32", "url.dll,FileProtocolHandler", url).Start()
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case "darwin":
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err = exec.Command("open", url).Start()
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default:
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err = fmt.Errorf("unsupported platform")
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}
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if err != nil {
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log.Fatal(err)
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}
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}
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var (
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letterRunes = []rune("abcdefghijklmnopqrstuvwxyz123456789")
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)
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func randomString(prefix string, length int) string {
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b := make([]rune, length)
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for i := range b {
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b[i] = letterRunes[rand.Intn(len(letterRunes))]
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}
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return prefix + string(b)
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}
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const loginFailedHTML = `
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" />
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<title>Login failed</title>
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</head>
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<body>
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<h4>Some failures occurred during the authentication</h4>
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<p>You can log an issue at <a href="https://github.com/azure/azure-cli/issues">Azure CLI GitHub Repository</a> and we will assist you in resolving it.</p>
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</body>
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</html>
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`
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const successfullLoginHTML = `
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" />
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<meta http-equiv="refresh" content="10;url=https://docs.microsoft.com/cli/azure/">
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<title>Login successfully</title>
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</head>
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<body>
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<h4>You have logged into Microsoft Azure!</h4>
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<p>You can close this window, or we will redirect you to the <a href="https://docs.microsoft.com/cli/azure/">Azure CLI documents</a> in 10 seconds.</p>
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</body>
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</html>
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`
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