(Delphi ActiveX) Blowfish Encryption to Match PHP's Mcrypt Extension

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.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
crypt: TChilkatCrypt2;
ivAscii: WideString;
keyAscii: WideString;
plainText: WideString;
cipherText: WideString;

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

crypt := TChilkatCrypt2.Create(Self);

// 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);
Memo1.Lines.Add(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);
Memo1.Lines.Add(cipherText);
// Output should be (case insensitive):
// d2b5abb73208aea3790621d028afcc74d8dd65fb9ea8e666444a72523f5ecca60df79a424e2c714fa6efbafcc40bdca
end;