Delphi DLL

Workaround for the deprecated Crypt2.MacBytes method

Shows how to replace the deprecated MacBytes method. (Chilkat is moving away from the use of CkByteData.) Delphi 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
success: Boolean;
crypt: HCkCrypt2;
keyHex: PWideChar;
path: PWideChar;
inData: HCkByteData;
outData: HCkByteData;
bdIn: HCkBinData;
mac_base64: PWideChar;

begin
success := False;

crypt := CkCrypt2_Create();

// Do HMAC using SHA-256.
CkCrypt2_putMacAlgorithm(crypt,'hmac');
CkCrypt2_putHashAlgorithm(crypt,'sha256');

keyHex := '000102030405060708090A0B0C0D0E0F';
success := CkCrypt2_SetMacKeyEncoded(crypt,keyHex,'hex');

path := 'c:/someDir/example.dat';

// ------------------------------------------------------------------------
// The MacBytes method is deprecated:

inData := CkByteData_Create();
CkByteData_loadFile(inData,path);

outData := CkByteData_Create();

success := CkCrypt2_MacBytes(crypt,inData,outData);

// ------------------------------------------------------------------------
// Workaround.
// (Chilkat is moving away from using CkByteData)

bdIn := CkBinData_Create();
CkBinData_LoadFile(bdIn,path);

// Set to any supported Chilkat encoding: base64, hex, base64url, hex_lower, etc.
CkCrypt2_putEncodingMode(crypt,'base64');
mac_base64 := CkCrypt2__macBdENC(crypt,bdIn);

Memo1.Lines.Add(mac_base64);

CkCrypt2_Dispose(crypt);
CkByteData_Dispose(inData);
CkByteData_Dispose(outData);
CkBinData_Dispose(bdIn);

end;