Meine Codepens

text_verschluesselung.php

Quell Code

<html>
<head>
<title>Verschl&uuml;sselung</title>
<script>
  var alleZeichen="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 ,.-;:!'()=?ßäöüÄÖÜ+*/";
  function verschluessele2(){
    var Urtext=document.Codierung.Urtext.value;
    var Schluessel=document.Codierung.Schluessel.value;
    var Codiert="";
    var Stelle, StelleS, Summe;
    var SPosition = 0;
    while (Schluessel.length < Urtext.length) {
      Schluessel = Schluessel + Schluessel; }
    for (i=0; i < Urtext.length ; i++ ) {
      Stelle = alleZeichen.indexOf(Urtext.charAt(i));
      StelleS = alleZeichen.indexOf(Schluessel.charAt(i));
      if ((Stelle > -1)&& (StelleS > -1)){
        Summe = Stelle + StelleS;
        if (Summe >= alleZeichen.length) {
          Summe = Summe - alleZeichen.length; }
        Codiert = Codiert + alleZeichen.charAt(Summe);}
      else { Codiert = Codiert + "_"; }
    }
    document.Codierung.VText.value = Codiert;
  }// Ende der Funktion

function entschluessele2(Vt, Schl){
    var Vtext=Vt.value;
    var Schluessel=Schl.value;
    var Decodiert="";
    var Stelle, StelleS, Summe;
    var SPosition = 0;
    while (Schluessel.length < Vtext.length) {
      Schluessel = Schluessel + Schluessel; }
    for (i=0; i < Vtext.length ; i++ ) {
      Stelle = alleZeichen.indexOf(Vtext.charAt(i));
      StelleS = alleZeichen.indexOf(Schluessel.charAt(i));
      if ((Stelle > -1)&& (StelleS > -1)) {
        Summe = Stelle - StelleS;
        if (Summe < 0) {
          Summe = Summe + alleZeichen.length; }
        Decodiert = Decodiert + alleZeichen.charAt(Summe);}
      else { Decodiert = Decodiert + " "; }
    }
    document.Codierung.Urtext.value = Decodiert;
  }// Ende der Funktion

</script>
</head>
<body >
<b>Text eingeben:</b>
<form   name="Codierung">
<textarea name="Urtext" cols="70" rows="10" wrap="virtual"></textarea><br>
Schl&uuml;sselwort:
<input type="text"  size="30"  name="Schluessel">
<input type="BUTTON" value="verschl&uuml;sseln" onclick="verschluessele2()">
<input type="BUTTON" value="entschl&uuml;sseln" onclick="entschluessele2(VText,Schluessel)"><br>
<textarea name="VText" cols="70" rows="10" wrap="virtual"></textarea>

</form>
</body>
</html>

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text_verschluesselung.php

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