(Delphi ActiveX) Generate RSA Public/Private Key Pair and Export to PEM

Delphi ActiveX example code showing how to generate an RSA public/private key pair and export to PEM files.

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
rsa: TChilkatRsa;
success: Integer;
publicKeyXml: WideString;
privateKeyXml: WideString;
privKey: TPrivateKey;
pubKey: TPublicKey;

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

rsa := TChilkatRsa.Create(Self);

// Generate a 1024-bit key.  Chilkat RSA supports
// key sizes ranging from 512 bits to 4096 bits.
success := rsa.GenerateKey(1024);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rsa.LastErrorText);
    Exit;
  end;

// Keys are exported in XML format:
publicKeyXml := rsa.ExportPublicKey();
Memo1.Lines.Add(publicKeyXml);

privateKeyXml := rsa.ExportPrivateKey();
Memo1.Lines.Add(privateKeyXml);

// Save the private key in PEM format:
privKey := TPrivateKey.Create(Self);
success := privKey.LoadXml(privateKeyXml);
success := privKey.SavePemFile('privateKey.pem');

// Save the public key in PEM format:
pubKey := TPublicKey.Create(Self);
success := pubKey.LoadFromString(publicKeyXml);
success := pubKey.SavePemFile(0,'publicKey.pem');
end;