Ox: Improve rpad generation.

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Changelog
 
 ## Unreleased
+### Changed
+- Ox: Improve rpad generation.
 
 ## [v0.4.0] 2022-04-30
 ### Added

helpers.go

@@ -9,7 +9,6 @@ import (
 	"crypto/rand"
 	"fmt"
 	"log"
-	"math/big"
 	"os"
 )
 
@@ -29,15 +28,13 @@ func readFile(path string) (*bytes.Buffer, error) {
 }
 
 func getRpad(messageLength int) string {
-	var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.,;?!+-_§$%&/()=")
-	lettersLength := int64(len(letters))
 	length := 100 - messageLength%100
-	s := make([]rune, length)
-	for i := range s {
-		pos, _ := rand.Int(rand.Reader, big.NewInt(lettersLength))
-		s[i] = letters[pos.Int64()]
+	rpad := make([]byte, length)
+	_, err := rand.Read(rpad)
+	if err != nil {
+		log.Fatal(err)
 	}
-	return string(s)
+	return fmt.Sprintf("%x", rpad)
 }
 
 func getID() string {