(Delphi ActiveX) Get Public Key from Certificate PEM

Loads a certificate from a PEM file and gets the cert's public key.

Note: This example requires Chilkat v11.0.0 or greater.

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
success: Integer;
cert: TChilkatCert;
pubkey: TPublicKey;

begin
success := 0;

cert := TChilkatCert.Create(Self);

success := cert.LoadFromFile('qa_data/certs/someCert.pem');
if (success = 0) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

// Get the certificate's public key:
pubkey := TPublicKey.Create(Self);
cert.GetPublicKey(pubkey.ControlInterface);

Memo1.Lines.Add(pubkey.GetPem(0));

// OK.. we have the public key which can be used in other Chilkat classes/methods...
end;