(Delphi ActiveX) OCSP Check Domain's Server Certificate Revocation Status

Sends an OCSP request to determine the revocation status for an SSL server certificate.

Note: This example requires Chilkat v9.5.0.84 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
http: TChilkatHttp;
status: Integer;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

http := TChilkatHttp.Create(Self);

// Check the revocation status of the SSL server certificate for chilkatsoft.com
status := http.OcspCheck('chilkatsoft.com',443);

Memo1.Lines.Add('chilkatsoft.com status = ' + IntToStr(status));

// The status can have 4 values:
// -1: Unable to check because of an error.
//  0: Good
//  1: Revoked
//  2: Unknown

if (status < 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
  end;

// Now check the status for a revoked server certificate.
status := http.OcspCheck('revoked.badssl.com',443);

Memo1.Lines.Add('revoked.badssl.com status = ' + IntToStr(status));
end;