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

Shows how to replace the deprecated HashFile 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, CkByteData, Crypt2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
crypt: HCkCrypt2;
path: PWideChar;
outData: HCkByteData;
hex_hash: PWideChar;

begin
crypt := CkCrypt2_Create();

CkCrypt2_putHashAlgorithm(crypt,'sha256');

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

// ------------------------------------------------------------------------
// The HashFile method is deprecated:

outData := CkByteData_Create();
success := CkCrypt2_HashFile(crypt,path,outData);

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

CkCrypt2_putEncodingMode(crypt,'hex_lower');
hex_hash := CkCrypt2__hashFileENC(crypt,path);

CkCrypt2_Dispose(crypt);
CkByteData_Dispose(outData);

end;