(Delphi ActiveX) Get Certificate's Public Key

Loads a certificate from PEM and gets the 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;
strPem: WideString;
pubKey: TPublicKey;

begin
success := 0;

cert := TChilkatCert.Create(Self);

strPem := '-----BEGIN CERTIFICATE----- ...';

success := cert.LoadPem(strPem);
if (success = 0) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

pubKey := TPublicKey.Create(Self);
cert.GetPublicKey(pubKey.ControlInterface);

// You can now use the public key object however it is needed,
// and access its various properties and methods..

Memo1.Lines.Add(pubKey.GetXml());
end;