Pascal (Lazarus/Delphi)

Decrypt a .p7m File (using a PFX)

See more Encryption Examples

_LANGUAGE_ sample code showing how to decrypt a .p7m using a .p12 / .pfx certificate w/ private key. 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.Crypt2;

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

procedure RunDemo;
var
  success: Boolean;
  crypt: TCrypt2;
  pfxPath: string;
  pfxPassword: string;
  inPath: string;
  outPath: string;

begin
  success := False;

  //  This example requires 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 := 'myCertAndKey.pfx';
  pfxPassword := 'test123';

  success := crypt.AddPfxSourceFile(pfxPath,pfxPassword);
  if (success <> True) then
    begin
      WriteLn(crypt.LastErrorText);
      Exit;
    end;

  //  Set the  outPath to whatever is appropriate.
  //  If you are decrypting a PDF, your output might be "out.pdf"...
  inPath := 'smime.p7m';
  outPath := 'original.txt';

  //  Indicate that we're doing public key decryption (i.e. PKCS7)
  crypt.CryptAlgorithm := 'pki';

  success := crypt.CkDecryptFile(inPath,outPath);
  if (success = False) then
    begin
      WriteLn(crypt.LastErrorText);
      Exit;
    end;

  WriteLn('Success.');


  crypt.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.