(Delphi ActiveX) Load Base64-encoded X.509 Certificate (.cer)

Loads a digital certificate from a base64 encoded DER X.509 Certificate (.cer, .crt) and fetches information about the cert.

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);

// LoadFromFile will load virtually any certificate format file.
// It will auto-recognize the format and load appropiately.
// A base64-encoded DER X.509 certificate file
// contains the binary DER in base64 encoded form.
// Therefore, it is a text file that will begin like this:
// -----BEGIN CERTIFICATE-----
// MIIFbjCCBFagAwIBAgIGdDPNv/L0MA0GCSqGSIb3DQEBBQUAMIHKMQswCQYDVQQG
// EwJVUzEQMA4GA1UECBMHQXJpem9uYTETMBEGA1UEBxMKU2NvdHRzZGFsZTEaMBgG
// ...

success := cert.LoadFromFile('/Users/chilkat/testData/cer/chilkat_base64.cer');
if (success <> 1) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

// DN = "Distinguished Name"
Memo1.Lines.Add('SubjectDN:' + cert.SubjectDN);

Memo1.Lines.Add('Common Name:' + cert.SubjectCN);
Memo1.Lines.Add('Issuer Common Name:' + cert.IssuerCN);

Memo1.Lines.Add('Serial Number:' + cert.SerialNumber);
end;