(Delphi ActiveX) Use Base64 RSA Key to Encrypt

Loads a Base64 RSA key and uses it to encrypt a string, returning the result in base64.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
pubkey: TPublicKey;
success: Integer;
rsa: TChilkatRsa;
encryptedStr: WideString;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

pubkey := TPublicKey.Create(Self);

success := pubkey.LoadBase64('MIICdgIBADA ... A9PXLk+j5A==');
if (success <> 1) then
  begin
    Memo1.Lines.Add(pubkey.LastErrorText);
    Exit;
  end;

rsa := TChilkatRsa.Create(Self);

success := rsa.ImportPublicKeyObj(pubkey.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rsa.LastErrorText);
    Exit;
  end;

rsa.EncodingMode := 'base64';

encryptedStr := rsa.EncryptStringENC('12345678',0);

Memo1.Lines.Add(encryptedStr);
end;