Lazarus Pascal

Example: Crypt2.DecryptStringENC method

Demonstrates how to call the DecryptStringENC method. Lazarus Pascal

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
  crypt: TCrypt2;
  encodedEncrypted: string;
  originalText: string;

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

  crypt := TCrypt2.Create;

  crypt.CryptAlgorithm := 'aes';
  crypt.CipherMode := 'cbc';
  crypt.KeyLength := 128;
  crypt.SetEncodedKey('000102030405060708090A0B0C0D0E0F','hex');
  crypt.SetEncodedIV('000102030405060708090A0B0C0D0E0F','hex');
  crypt.EncodingMode := 'base64';

  //  Return the base64 encoded encrypted bytes
  encodedEncrypted := crypt.EncryptStringENC('Hello World!');
  WriteLn('Encrypted: ' + encodedEncrypted);

  //  Output:
  //  Encrypted: qiq+IFhcjTkEIkZyf31V/g==

  //  Decrypt
  originalText := crypt.DecryptStringENC(encodedEncrypted);

  WriteLn('Decrypted: ' + originalText);

  //  Output:
  //  Decrypted: Hello World!


  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.