From 917dabe6af6e76f81e09b9e1c1c1e16586d6cf99 Mon Sep 17 00:00:00 2001
From: Martin Dosch <martin@mdosch.de>
Date: Mon, 2 May 2022 15:07:58 +0200
Subject: [PATCH] Ox: Improve rpad generation.

---
 CHANGELOG.md |  2 ++
 helpers.go   | 13 +++++--------
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index ed54f21..0858b5d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,8 @@
 # Changelog
 
 ## Unreleased
+### Changed
+- Ox: Improve rpad generation.
 
 ## [v0.4.0] 2022-04-30
 ### Added
diff --git a/helpers.go b/helpers.go
index 37f56e0..79b10e1 100644
--- a/helpers.go
+++ b/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 {