Delphi DLL

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. Delphi DLL

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
cert: HCkCert;

begin
success := False;

cert := CkCert_Create();

success := CkCert_LoadFromFile(cert,'qa_data/certs/sample.cer');
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    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: ' + CkCert__issuerDN(cert));

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

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

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

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

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

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

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

CkCert_Dispose(cert);

end;