Pascal (Lazarus/Delphi)

CAdES BES Detached Signature

See more Encryption Examples

Demonstrates how to create a CAdES BES detached signature file (.p7s). 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.Crypt2;

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

procedure RunDemo;
var
  success: Boolean;
  crypt: TCrypt2;
  pfxPath: string;
  pfxPassword: string;
  cert: TCert;
  inFile: string;
  sigFile: string;

begin
  success := False;

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

  crypt := TCrypt2.Create;

  //  Use a digital certificate and private key from a PFX file (.pfx or .p12).
  pfxPath := '/Users/chilkat/testData/pfx/acme.pfx';
  pfxPassword := 'test123';

  cert := TCert.Create;
  success := cert.LoadPfxFile(pfxPath,pfxPassword);
  if (success <> True) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  //  Tell the crypt component to use this cert.
  success := crypt.SetSigningCert(cert);
  if (success <> True) then
    begin
      WriteLn(crypt.LastErrorText);
      Exit;
    end;

  //  The CadesEnabled property applies to all methods that create PKCS7 signatures. 
  //  To create a CAdES-BES signature, set this property equal to true. 
  crypt.CadesEnabled := True;

  //  We can sign any type of file, creating a .p7s as output:
  inFile := '/Users/chilkat/testData/pdf/sample.pdf';
  sigFile := '/Users/chilkat/testData/p7s/sample.p7s';

  //  Create the detached CAdES-BES signature:
  success := crypt.CreateP7S(inFile,sigFile);
  if (success = False) then
    begin
      WriteLn(crypt.LastErrorText);
      Exit;
    end;

  success := crypt.VerifyP7S(inFile,sigFile);
  if (success = False) then
    begin
      WriteLn(crypt.LastErrorText);
      Exit;
    end;

  WriteLn('Success!');


  crypt.Free;
  cert.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.