Base64 Encode/Decode a String

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

Download Chilkat Crypt ActiveX

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;
strBase64: 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
    Memo1.Lines.Add(crypt.LastErrorText);
    Exit;
  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';

//  Indicate that no encryption should be performed,
//  only encoding/decoding.
crypt.CryptAlgorithm := 'none';
crypt.EncodingMode := 'base64';

//  Other possible EncodingMode settings are:
//  "quoted-printable", "hex", "uu", "base32", and "url"

strBase64 := crypt.EncryptStringENC(s);

Memo1.Lines.Add(strBase64);

decoded := crypt.DecryptStringENC(strBase64);

Memo1.Lines.Add(decoded);
end;