(Delphi ActiveX) Get Certificate's Public Key

Loads a certificate from PEM and gets the public key.

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
cert: TChilkatCert;
strPem: WideString;
success: Integer;
pubKey: IPublicKey;

begin
cert := TChilkatCert.Create(Self);

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

success := cert.LoadPem(strPem);
if (success <> 1) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

pubKey := cert.ExportPublicKey();
if (cert.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

// 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;