(Delphi DLL) Workaround for the deprecated EncryptString and DecryptString methods

Shows how to replace the deprecated EncryptString and DecryptString methods. (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;
plainText: PWideChar;
encryptedBytes: HCkByteData;
decryptedStr: PWideChar;
bd: 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;

CkCrypt2_putCharset(crypt,'utf-8');
plainText := 'text to be encrypted';

// ------------------------------------------------------------------------
// The EncryptString and DecryptString methods are deprecated:

encryptedBytes := CkByteData_Create();
success := CkCrypt2_EncryptString(crypt,plainText,encryptedBytes);

decryptedStr := CkCrypt2__decryptString(crypt,encryptedBytes);
Memo1.Lines.Add('Decrypted: ' + decryptedStr);

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

bd := CkBinData_Create();
CkBinData_AppendString(bd,plainText,'utf-8');

// in-place encrypt
CkCrypt2_EncryptBd(crypt,bd);

// in-place decrypt
CkCrypt2_DecryptBd(crypt,bd);
decryptedStr := CkBinData__getString(bd,'utf-8');
Memo1.Lines.Add('Decrypted: ' + decryptedStr);

CkCrypt2_Dispose(crypt);
CkByteData_Dispose(encryptedBytes);
CkBinData_Dispose(bd);

end;