Pascal (Lazarus/Delphi)

Binary Certificate Extension Data

See more Certificates Examples

Demonstrates how to binary certificate extension data by OID.

The GetExtensionBd method is added in Chilkat v9.5.0.96.

Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Cert,
  Chilkat.BinData;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  cert: TCert;
  bd: TBinData;
  oid: string;
  strXml: string;

begin
  success := False;

  cert := TCert.Create;

  success := cert.LoadFromFile('qa_data/certs/testCert.cer');
  if (success = False) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  bd := TBinData.Create;

  //  The particular certificate in this test contains the following extensions

  oid := '1.2.250.1.71.1.2.5';
  success := cert.GetExtensionBd(oid,bd);
  if (success = True) then
    begin
      WriteLn(oid + ': ' + bd.GetEncoded('hex_lower'));
    end;

  oid := '1.2.250.1.71.1.2.2';
  success := cert.GetExtensionBd(oid,bd);
  if (success = True) then
    begin
      WriteLn(oid + ': ' + bd.GetEncoded('hex_lower'));
    end;

  oid := '1.2.250.1.71.1.2.3';
  success := cert.GetExtensionBd(oid,bd);
  if (success = True) then
    begin
      WriteLn(oid + ': ' + bd.GetEncoded('hex_lower'));
    end;

  oid := '1.2.250.1.71.1.2.7';
  success := cert.GetExtensionBd(oid,bd);
  if (success = True) then
    begin
      WriteLn(oid + ': ' + bd.GetEncoded('hex_lower'));
    end;

  oid := '1.2.250.1.71.4.2.5';
  success := cert.GetExtensionBd(oid,bd);
  if (success = True) then
    begin
      WriteLn(oid + ': ' + bd.GetEncoded('hex_lower'));
    end;

  //  Sample output:
  //  1.2.250.1.71.1.2.5: 040180
  //  1.2.250.1.71.1.2.2: 020100
  //  1.2.250.1.71.1.2.3: 1315383032353030303030312f32393030303539313432
  //  1.2.250.1.71.1.2.7: 02010a
  //  1.2.250.1.71.4.2.5: 30060c04534d3236

  //  The above binary values are actually ASN.1
  //  You can get the ASN.1 decoed by calling GetExtensionAsXml to get it in XML format,
  //  and then you extract the values from the XML.

  oid := '1.2.250.1.71.1.2.5';
  strXml := cert.GetExtensionAsXml(oid);
  if (cert.LastMethodSuccess = True) then
    begin
      WriteLn(oid + ': ' + strXml);
    end;

  oid := '1.2.250.1.71.1.2.2';
  strXml := cert.GetExtensionAsXml(oid);
  if (cert.LastMethodSuccess = True) then
    begin
      WriteLn(oid + ': ' + strXml);
    end;

  oid := '1.2.250.1.71.1.2.3';
  strXml := cert.GetExtensionAsXml(oid);
  if (cert.LastMethodSuccess = True) then
    begin
      WriteLn(oid + ': ' + strXml);
    end;

  oid := '1.2.250.1.71.1.2.7';
  strXml := cert.GetExtensionAsXml(oid);
  if (cert.LastMethodSuccess = True) then
    begin
      WriteLn(oid + ': ' + strXml);
    end;

  oid := '1.2.250.1.71.4.2.5';
  strXml := cert.GetExtensionAsXml(oid);
  if (cert.LastMethodSuccess = True) then
    begin
      WriteLn(oid + ': ' + strXml);
    end;

  //  Sample output:
  //  1.2.250.1.71.1.2.5: <octets>gA==</octets>
  //  1.2.250.1.71.1.2.2: <int>00</int>
  //  1.2.250.1.71.1.2.3: <printable>8025000001/2900059142</printable>
  //  1.2.250.1.71.1.2.7: <int>0A</int>
  //  1.2.250.1.71.4.2.5: <sequence><utf8>SM26</utf8></sequence>

  //  "gA==" is the base64 encoded byte values
  //  "0A" is hex for decimal 10


  cert.Free;
  bd.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.