Pascal (Lazarus/Delphi)

X509Certificate GetCertHash SHA256

See more Certificates Examples

Shows how to get the SHA256 hash of a certificate. 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;
  bdDer: TBinData;
  certHash: string;

begin
  success := False;

  cert := TCert.Create;

  //  Load a certificate object with a certificate.
  //  The certificate object could have come from any source,
  //  or perhaps was obtained from another Chilkat function.
  //  The source does not matter.  What matters is that we have
  //  a cert object loaded with the certificate..
  success := cert.LoadFromFile('qa_data/certs/cert_test123.cer');
  if (success <> True) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  //  Get the binary DER of the certificae, and compute the SHA256 hash:
  bdDer := TBinData.Create;
  cert.ExportCertDerBd(bdDer);

  //  Get the base64 representation of the SHA256 hash.
  certHash := bdDer.GetHash('sha256','base64');

  WriteLn('Certificate hash in base64 = ' + certHash);


  cert.Free;
  bdDer.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.