(Delphi DLL) Workaround for the deprecated Crypt2.DecryptBytesENC method

Shows how to replace the deprecated DecryptBytesENC method. (Chilkat is moving away from the use of CkByteData.)

Note: This example requires Chilkat v11.0.0 or greater.

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, BinData, CkByteData, Crypt2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
crypt: HCkCrypt2;
success: Boolean;
unencryptedBytes: HCkByteData;
decryptedBytes: HCkByteData;
encryptedAsHex: PWideChar;
bd: HCkBinData;
bd2: HCkBinData;

begin
crypt := CkCrypt2_Create();

CkCrypt2_putCryptAlgorithm(crypt,'aes');
CkCrypt2_putCipherMode(crypt,'cbc');
CkCrypt2_putKeyLength(crypt,128);
CkCrypt2_putPaddingScheme(crypt,0);
CkCrypt2_SetEncodedKey(crypt,'000102030405060708090A0B0C0D0E0F','hex');
CkCrypt2_SetEncodedIV(crypt,'000102030405060708090A0B0C0D0E0F','hex');

success := False;

// ------------------------------------------------------------------------
// The EncryptBytesENC and DecryptBytesENC methods are deprecated:

unencryptedBytes := CkByteData_Create();
CkByteData_appendEncoded(unencryptedBytes,'AABBCCDDEEFF01020304','hex');

decryptedBytes := CkByteData_Create();

CkCrypt2_putEncodingMode(crypt,'hex');
encryptedAsHex := CkCrypt2__encryptBytesENC(crypt,unencryptedBytes);
Memo1.Lines.Add('Encrypted: ' + encryptedAsHex);

success := CkCrypt2_DecryptBytesENC(crypt,encryptedAsHex,decryptedBytes);

// ------------------------------------------------------------------------
// Replace the above CkByteData usage with the following code:
// (Chilkat is moving away from using CkByteData)

bd := CkBinData_Create();
CkBinData_AppendEncoded(bd,'AABBCCDDEEFF01020304','hex');

// in-place encrypt, then get as hex.
CkCrypt2_EncryptBd(crypt,bd);
encryptedAsHex := CkBinData__getEncoded(bd,'hex');
Memo1.Lines.Add('Encrypted: ' + encryptedAsHex);

// load from hex, then decrypt.
bd2 := CkBinData_Create();
CkBinData_AppendEncoded(bd2,encryptedAsHex,'hex');
CkCrypt2_DecryptBd(crypt,bd2);
Memo1.Lines.Add('Decrypted: ' + CkBinData__getEncoded(bd2,'hex'));

CkCrypt2_Dispose(crypt);
CkByteData_Dispose(unencryptedBytes);
CkByteData_Dispose(decryptedBytes);
CkBinData_Dispose(bd);
CkBinData_Dispose(bd2);

end;