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package bitmask
import (
"io/ioutil"
"log"
"math/rand"
"os"
"runtime"
"strings"
"time"
)
/* functions for local authentication of control endpoints */
const tokenPath = "/dev/shm/bitmask-token"
func GenerateAuthToken() {
if runtime.GOOS != "linux" {
log.Println("Authentication token only implemented in linux at the moment.")
return
}
t := getRandomString()
err := ioutil.WriteFile(tokenPath, []byte(t), os.FileMode(int(0600)))
if err != nil {
log.Println("Could not write authentication token.")
}
}
func ReadAuthToken() string {
if runtime.GOOS != "linux" {
log.Println("Authentication token only implemented in linux at the moment.")
return ""
}
token, err := ioutil.ReadFile(tokenPath)
if err != nil {
log.Println("Error reading token:", err)
}
return string(token)
}
func getRandomString() string {
rand.Seed(time.Now().UnixNano())
chars := []rune("ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
"abcdefghijklmnopqrstuvwxyz" +
"0123456789")
length := 40
var b strings.Builder
for i := 0; i < length; i++ {
b.WriteRune(chars[rand.Intn(len(chars))])
}
return b.String()
}
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