Pascal (Lazarus/Delphi)

Blowfish Encryption to Match PHP's Mcrypt Extension

See more Encryption Examples

Demonstrates how to match Blowfish encryption results with PHP's mcrypt extension.

Please refer to this PHP (non-Chilkat) example for PHP Blowfish Encryption. The code here matches the PHP mcrypt results on that web page.

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
  crypt: TCrypt2;
  ivAscii: string;
  keyAscii: string;
  plainText: string;
  cipherText: string;

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

  crypt := TCrypt2.Create;

  //  Use "blowfish2" to get proper results:
  crypt.CryptAlgorithm := 'blowfish2';

  //  CipherMode may be "ecb" or "cbc"
  crypt.CipherMode := 'cbc';

  //  KeyLength (in bits) may be a number between 32 and 448.
  //  128-bits is usually sufficient.  The KeyLength must be a 
  //  multiple of 8.
  crypt.KeyLength := 256;

  //  Pad with NULL bytes (PHP pads with NULL bytes)
  crypt.PaddingScheme := 3;

  //  EncodingMode specifies the encoding of the output for
  //  encryption, and the input for decryption.
  //  It may be "hex", "url", "base64", or "quoted-printable".
  crypt.EncodingMode := 'hex';

  //  The blowfish algorithm uses a 64-bit block size, 
  //  therefore the IV must be 8 bytes:
  ivAscii := '12345678';
  crypt.SetEncodedIV(ivAscii,'ascii');

  //  For 256-bit encryption, the key is 32 bytes:
  keyAscii := '1234567890123456ABCDEFGHIJKLMNOP';
  crypt.SetEncodedKey(keyAscii,'ascii');

  plainText := 'The quick brown fox jumped over the lazy dog';

  cipherText := crypt.EncryptStringENC(plainText);
  WriteLn(cipherText);
  //  Output should be (case insensitive):
  //  276855ca6c0d60f7d9708210440c1072e05d078e733b34b4198d609dc2fcc2f0c30926cdef3b6d52baf6e345aa03f83e

  //  Do 128-bit Blowfish encryption:
  crypt.KeyLength := 128;
  keyAscii := '1234567890123456';
  crypt.SetEncodedKey(keyAscii,'ascii');

  cipherText := crypt.EncryptStringENC(plainText);
  WriteLn(cipherText);
  //  Output should be (case insensitive):
  //  d2b5abb73208aea3790621d028afcc74d8dd65fb9ea8e666444a72523f5ecca60df79a424e2c714fa6efbafcc40bdca0


  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.