(Delphi DLL) 2-Key Triple DES (112 bits)

Demonstrates 2-Key Triple DES encryption (112-bit 3DES encryption).

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

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Crypt2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
crypt: HCkCrypt2;
keyHex: PWideChar;
encStr: PWideChar;
decStr: PWideChar;

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

crypt := CkCrypt2_Create();

// Specify 3DES for the encryption algorithm:
CkCrypt2_putCryptAlgorithm(crypt,'3des');

CkCrypt2_putCipherMode(crypt,'ecb');

// For 2-Key Triple-DES, use a key length of 128
// (Given that each byte's msb is a parity bit, the strength is really 112 bits).
CkCrypt2_putKeyLength(crypt,128);

// Pad with zeros
CkCrypt2_putPaddingScheme(crypt,3);

// EncodingMode specifies the encoding of the output for
// encryption, and the input for decryption.
// It may be "hex", "url", "base64", or "quoted-printable".
CkCrypt2_putEncodingMode(crypt,'hex');

// Let's create a secret key by using the MD5 hash of a password.
// The Digest-MD5 algorithm produces a 16-byte hash (i.e. 128 bits)
CkCrypt2_putHashAlgorithm(crypt,'md5');
keyHex := CkCrypt2__hashStringENC(crypt,'secretPassword');

// Set the encryption key:
CkCrypt2_SetEncodedKey(crypt,keyHex,'hex');

// Encrypt
encStr := CkCrypt2__encryptStringENC(crypt,'The quick brown fox jumped over the lazy dog');
Memo1.Lines.Add(encStr);

// Now decrypt:
decStr := CkCrypt2__decryptStringENC(crypt,encStr);
Memo1.Lines.Add(decStr);

CkCrypt2_Dispose(crypt);

end;