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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
cert: HCkCert;
strPem: PWideChar;
pubKey: HCkPublicKey;

begin
success := False;

cert := CkCert_Create();

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

success := CkCert_LoadPem(cert,strPem);
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    Exit;
  end;

pubKey := CkPublicKey_Create();
CkCert_GetPublicKey(cert,pubKey);

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

Memo1.Lines.Add(CkPublicKey__getXml(pubKey));

CkCert_Dispose(cert);
CkPublicKey_Dispose(pubKey);

end;