/
main.go
252 lines (215 loc) · 6.48 KB
/
main.go
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package main
import (
"crypto/rsa"
"database/sql"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"os"
"strings"
"time"
geemail "geegle.org/infra/geemail-client"
"github.com/dgrijalva/jwt-go"
_ "github.com/go-sql-driver/mysql"
)
var _db *sql.DB
type Player struct {
Name string `json:"username"`
Affiliation string `json:"affiliation"`
Points int
}
type Challenge struct {
Sender string
Title string
Body string
DependsOnPoints int
Delay int64
}
type Flag struct {
Flag string
Points int
}
type Configuration struct {
ListenAddress string
DbType string
DbAddress string
JwtPubKey []byte
VerifyKey *rsa.PublicKey
Challenges []Challenge
Flags []Flag
}
var _configuration = Configuration{}
func initScoreboardRsp(w http.ResponseWriter) {
w.Header().Add("Server", "scoreboard")
}
func addFlag(user string, body string, sendConfirmation bool) {
var oPoints int
err := _db.QueryRow("select points from scoreboard where user = ?", user).Scan(&oPoints)
if err != nil {
fmt.Println(err)
msg := []byte("Sorry, something went wrong :(")
geemail.SendEmailNow("flag-noreply@geegle.org", user, "Error", msg)
return
}
foundFlags := ""
flags := ""
points := 0
for _, flag := range _configuration.Flags {
if strings.Contains(body, flag.Flag) {
var count int
err = _db.QueryRow("select count(*) from submission where flag = ? and user = ?", flag.Flag, user).Scan(&count)
if err != nil {
fmt.Println(err)
msg := []byte("Sorry, something went wrong :(")
geemail.SendEmailNow("flag-noreply@geegle.org", user, "Error", msg)
return
}
if count == 0 {
points += flag.Points
flags += flag.Flag + ", "
_db.Exec("insert into submission (flag, user, time) values(?, ?, ?)", flag.Flag, user, time.Now().UnixNano()/1000000)
} else {
foundFlags += flag.Flag + ", "
}
}
}
if points > 0 {
_db.Exec("update scoreboard set points = ? where user = ?", oPoints+points, user)
if sendConfirmation {
msg := fmt.Sprintf("You found %s you have earned %d points. You now have %d points.", flags, points, oPoints+points)
if foundFlags != "" {
msg += fmt.Sprintf("<br />You already submitted %s flags.", foundFlags)
}
geemail.SendEmailNow("flag-noreply@geegle.org", user, "Congrats", []byte(msg))
}
fmt.Println(oPoints + points)
for _, challenge := range _configuration.Challenges {
if challenge.DependsOnPoints <= (oPoints+points) && challenge.DependsOnPoints > oPoints {
body := strings.Replace(challenge.Body, "\n", "<br>", -1)
geemail.SendEmailWithDelay(challenge.Sender, user, challenge.Title, []byte(body), challenge.Delay)
}
}
} else {
var msg []byte
if foundFlags != "" {
msg = []byte(fmt.Sprintf("<br />You already submitted %s flags.", foundFlags))
} else {
msg = []byte("Sorry, we did not recognise that flag :(")
}
geemail.SendEmailNow("flag-noreply@geegle.org", user, "Error", msg)
}
}
func listenAndServe(addr string) error {
mux := http.NewServeMux()
mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
initScoreboardRsp(w)
affiliation := map[string]string{}
rsp, err := http.Get("https://gaia.corp.geegle.org/api/getusers")
bodyBytes, _ := ioutil.ReadAll(rsp.Body)
json.Unmarshal(bodyBytes, &affiliation)
fmt.Println("Got users", string(bodyBytes))
data := make([]Player, 0, 30)
rows, err := _db.Query("SELECT scoreboard.user, scoreboard.points FROM scoreboard, submission WHERE scoreboard.user=submission.user GROUP BY submission.user ORDER BY scoreboard.points DESC, MAX(submission.time) asc;")
if err != nil {
http.Error(w, "I don't know what happened", http.StatusInternalServerError)
return
}
for rows.Next() {
player := Player{}
rows.Scan(&player.Name, &player.Points)
var ok bool
player.Affiliation, ok = affiliation[player.Name]
player.Name = strings.Split(player.Name, "@")[0] + "@"
if !ok {
continue // Don't add if not returned by gaia
}
data = append(data, player)
}
RenderTemplate(w, "index.html", data)
})
mux.HandleFunc("/api/submit", func(w http.ResponseWriter, r *http.Request) {
initScoreboardRsp(w)
tknStr := r.Header.Get("X-Geegle-JWT")
err := confirmFromGeemail(tknStr, _configuration.VerifyKey)
if err != nil {
w.WriteHeader(http.StatusUnauthorized)
json.NewEncoder(w).Encode(map[string]string{"error": "Invalid JWT"})
fmt.Println(err)
return
}
data := struct {
Username string `json:"username"`
Body string `json:"flag"`
SendConfirmation bool `json:"confirm"`
}{}
if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
http.Error(w, "Malformed Data", http.StatusBadRequest)
fmt.Println(err)
return
}
addFlag(data.Username, data.Body, data.SendConfirmation)
})
mux.HandleFunc("/api/init_user", func(w http.ResponseWriter, r *http.Request) {
initScoreboardRsp(w)
tknStr := r.Header.Get("X-Geegle-JWT")
err := confirmFromGeemail(tknStr, _configuration.VerifyKey)
if err != nil {
w.WriteHeader(http.StatusUnauthorized)
json.NewEncoder(w).Encode(map[string]string{"error": "Invalid JWT"})
fmt.Println(err)
return
}
data := struct {
Username string `json:"username"`
}{}
if err := json.NewDecoder(r.Body).Decode(&data); err != nil {
http.Error(w, "Malformed Data", http.StatusBadRequest)
fmt.Println(err)
return
}
var inited int
err = _db.QueryRow("select count(*) from scoreboard where user = ?", data.Username).Scan(&inited)
if err != nil {
fmt.Println(err.Error())
w.WriteHeader(http.StatusInternalServerError)
return
}
if inited > 0 {
w.WriteHeader(200)
return
}
_db.Exec("insert into scoreboard (user, points) values (?,?)", data.Username, 0)
addFlag(data.Username, "GEEGLE{WELCOME_TO_GEEGLE}", false)
w.WriteHeader(200)
})
mux.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
initScoreboardRsp(w)
fmt.Fprintln(w, "👍")
})
return http.ListenAndServe(addr, mux)
}
func readConfig() {
file, _ := os.Open(os.Args[1])
defer file.Close()
decoder := json.NewDecoder(file)
err := decoder.Decode(&_configuration)
if err != nil {
panic(err)
}
_configuration.VerifyKey, err = jwt.ParseRSAPublicKeyFromPEM(_configuration.JwtPubKey)
if err != nil {
panic(err)
}
}
func main() {
readConfig()
var err error
_db, err = sql.Open(_configuration.DbType, _configuration.DbAddress)
if err != nil {
panic(err)
}
defer _db.Close()
log.Panic(listenAndServe(_configuration.ListenAddress))
}