package auth
import (
"context"
"encoding/json"
"log"
"net/http"
"strings"
"golang.org/x/oauth2"
)
func Office365(authCallback AuthCallback, clientID, clientSecret, domain string) (login, callback http.HandlerFunc) {
ctx := context.Background()
conf := &oauth2.Config{
ClientID: clientID,
ClientSecret: clientSecret,
Scopes: []string{"user.read"},
Endpoint: oauth2.Endpoint{
AuthURL: "https://login.microsoftonline.com/common/oauth2/v2.0/authorize",
TokenURL: "https://login.microsoftonline.com/common/oauth2/v2.0/token",
},
}
login = func(w http.ResponseWriter, r *http.Request) {
url := conf.AuthCodeURL("state", oauth2.AccessTypeOnline)
http.Redirect(w, r, url, http.StatusFound)
}
callback = func(w http.ResponseWriter, r *http.Request) {
code := r.FormValue("code")
tok, err := conf.Exchange(ctx, code)
if err != nil {
log.Println(err)
return
}
client := conf.Client(ctx, tok)
user, err := getOfficeUser(client)
if err != nil {
log.Println(err)
return
}
authCallback(w, r, isInDomain(user, domain), user)
}
return login, callback
}
func getOfficeUser(client *http.Client) (string, error) {
resp, err := client.Get("https://graph.microsoft.com/v1.0/me/")
if err != nil {
return "", err
}
defer resp.Body.Close()
var data struct {
Mail string `json:"mail"`
}
if err = json.NewDecoder(resp.Body).Decode(&data); err != nil {
return "", err
}
return data.Mail, nil
}
func isInDomain(mail, domain string) bool {
return strings.HasSuffix(mail, domain)
}