(Delphi ActiveX) Get Issuer Certificate Information

See more Certificates Examples

A certificate contains information about its issuer. This example demonstrates how to get the issuer information from a certificate.

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;
success: Integer;

begin
cert := TChilkatCert.Create(Self);

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

// Get issuer information:

// -----------------------------------------------------------------------
// (Not all subject fields may exist depending on the issuer certificate.)
// -----------------------------------------------------------------------

// Issuer DN (Distinguished Name, i.e. all the Issuer subject parts)
Memo1.Lines.Add('DN: ' + cert.IssuerDN);

// Common Subject parts:
// Issuer Common Name
Memo1.Lines.Add('CN: ' + cert.IssuerCN);

// Issuer Country
Memo1.Lines.Add('C: ' + cert.IssuerC);

// Issuer Email address
Memo1.Lines.Add('E: ' + cert.IssuerE);

// Issuer Locality
Memo1.Lines.Add('L: ' + cert.IssuerL);

// Issuer Organization
Memo1.Lines.Add('O: ' + cert.IssuerO);

// Issuer Organizational Unit
Memo1.Lines.Add('OU: ' + cert.IssuerOU);

// Issuer State
Memo1.Lines.Add('S: ' + cert.IssuerS);
end;