Encryption of strings

[Gunderak]

Got a bit bored and decided to code my own little encryption thing.
It basically get's a string and converts it into an ASCII array, it then multiplies each item in the array by a "key" and encodes that with base64.
The result ends up being relatively long but still pretty secure.
I don't intend for this to be used for passwords so i'm releasing it.
If you'd like to see what it does, iv'e attaches a screenshot.
Here's the class, name it "Encryption":

PHP Code:

//#CLIENTSIDE
function Encrypt(str){
  temp.result = "";
  //Loops through the individual characters.
  for(i = 0; i < str.length(); i ++){
    //Get's the character it's up to.
    temp.char = str.substring(i, +1); 
    temp.num = getascii(char); //Converts it to ascii
    //Adds the ASCII character to the array and also "hashes" it.
    result.add(num/2*50/5); 
  }
  //Encodes the already confusing string with base64.
  //Typically used for encoding images but meh.
  result = base64encode(result);
  return temp.result;
}
function Decrypt(str){
  temp.result = "";
  //Decodes the string and turns it into a "hashed" ASCII array.
  temp.str = base64decode(str);
  //Splits the string into an array.
  temp.tok = str.tokenize();
  for(i = 0; i < tok.size(); i ++){
    temp.char = tok[i]*2/50*5;
    //Returns the character from ASCII form.
    result = result@char(char);
  }
  return temp.result;
} 


And here's an example of a use for it.

PHP Code:

//#CLIENTSIDE
function onCreated(){
  this.join("Encryption");
}
function onWeaponFired(){
  DrawGUI();
}
function DrawGUI(){
  new GuiWindowCtrl("Encryption_Window") {
    profile = GuiBlueWindowProfile;
    clientrelative = true;
    width = 331;
    height = 286;
    canmove = true;
    canresize = false;
    closequery = false;
    destroyonhide = true;
    canmaximize = false;
    canminimize = false;
    text = "Encryption";
    x = screenwidth/2 - width/2;
    y = screenheight/2 - height/2;

    new GuiScrollCtrl("Text1_Scroll") {
      profile = GuiBlueScrollProfile;
      height = 114;
      hscrollbar = "dynamic";
      vscrollbar = "dynamic";
      width = 320;
      x = -1;

      new GuiMLTextEditCtrl("Text1") {
        profile = GuiBlueMLTextEditProfile;
        height = 17;
        horizsizing = "width";
        text = "Hello World!";
        width = 295;
      }
    }
    new GuiScrollCtrl("Text2_Scroll") {
      profile = GuiBlueScrollProfile;
      height = 114;
      hscrollbar = "dynamic";
      vscrollbar = "dynamic";
      width = 320;
      y = 114;
      x = -1;

      new GuiMLTextCtrl("Text2") {
        profile = GuiBlueMLTextProfile;
        height = 17;
        horizsizing = "width";
        width = 295;
      }
    }
    new GuiButtonCtrl("Encrypt") {
      profile = GuiBlueButtonProfile;
      text = "Encrypt";
      width = 80;
      y = 227;
      x = -1;
    }
    new GuiButtonCtrl("Decrypt") {
      profile = GuiBlueButtonProfile;
      text = "Decrypt";
      width = 80;
      x = 240;
      y = 227;
    }
  }
}
function Encrypt.onAction() {
  Text2.text = Encrypt(Text1.text);
}

function Decrypt.onAction() {
  Text2.text = Decrypt(Text1.text);
} 


This isn't the most efficient way of encrypting strings, but I just wanted to attempt it.
I originally wanted to return the binary of the strings but graal doesn't contain a default way to do it.
Meaning i'd have to write a really long code and try to comprehend confusing formulas.