Probleme mit DCPcrypt

[DLX]

Hallo,

ich verwende DCPcrypt zum ver- und entschlüsseln von Text. Das klappt soweit auch Prima, jedoch hab ich das Problem das irgendwelche komischen Sonderzeichen beim entschlüsseln angehängt werden, habt ihr eine Lösung dafür ?

Code:

unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs,DCPcrypt2, DCPblockciphers, DCPrijndael, DCPbase64,
  Vcl.StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Memo1: TMemo;
    Edit1: TEdit;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
function DecryptText():String;
var Cipher : TDCP_rijndael;
    Data, Key, IV : ansistring;
    index, dataLength, bsize, pad: integer;

begin
  key := '12345678901234567890123456789012';
  IV  := '1234567890123456';
  Data := form1.Edit1.text;
  Data := DCPBase64.Base64DecodeStr(Data);
  Cipher := TDCP_rijndael.Create(nil);
  try
    Cipher.Init(Key[1],128,@IV[1]);

    Cipher.DecryptCBC(Data[1],Data[1],Length(Data));

  finally
    Cipher.Burn;
    Cipher.Free;
  end;

  form1.Memo1.Lines.Add(Data);


end;

function EncryptText():String;
var Cipher : TDCP_rijndael;
    Data,DataDec, Key, IV : ansistring;
    index, dataLength, bsize, pad: integer;
begin
  key := '12345678901234567890123456789012';
  IV  := '1234567890123456';
  //Data := 'thisis128bitstxt';
  Data := form1.edit1.text;

  Cipher := TDCP_rijndael.Create(nil);
  try
    Cipher.Init(Key[1],128,@IV[1]);

    //don't miss padding
    {start padding}
    dataLength := Length(Data);
    bsize := (Cipher.BlockSize div 8);
    pad := bsize - (dataLength mod bsize);
    for index := 1 to pad do
      Data := Data+chr(pad);
    {end padding}

    Cipher.EncryptCBC(Data[1],Data[1],Length(Data));

  finally
    Cipher.Burn;
    Cipher.Free;
  end;

  Data := DCPBase64.Base64EncodeStr(Data);
  form1.Memo1.Lines.Add(Data);

end;

procedure TForm1.Button1Click(Sender: TObject);
begin
EncryptText();

end;
procedure TForm1.Button2Click(Sender: TObject);
begin
DecryptText();
end;

procedure TForm1.FormCreate(Sender: TObject);
begin

end;

end.

Ich hoffe Ihr habt eine Idee, Danke schonmal

Grüße