Base64 Encode/Decode a String

Download Chilkat Crypt ActiveX

Delphi example to base-64 encode and decode a string.

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATCRYPT2Lib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
crypt: TChilkatCrypt2;
success: Integer;
s: String;
qp: String;
decoded: String;

begin
crypt := TChilkatCrypt2.Create(Self);

//  Any string argument automatically begins the 30-day trial.
success := crypt.UnlockComponent('30-day trial');
if (success <> 1) then
  begin
    ShowMessage('Crypt component unlock failed');

  end;

s := 'A friend called me up the other day and talked about investing in a dot-com that sells lobsters. Internet lobsters. Where will this end? --Donald Trump';

crypt.CryptAlgorithm := 'none';
crypt.EncodingMode := 'base64';

//  Other possible EncodingMode settings are:
//  "quoted-printable", "hex", and "url"

qp := crypt.EncryptStringENC(s);

Memo1.Lines.Add(qp);

decoded := crypt.DecryptStringENC(qp);

Memo1.Lines.Add(decoded);


end;