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

Shows how to replace the deprecated VerifyBytesENC 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;
originalDataPath: PWideChar;
base64_detached_signature: PWideChar;
originalDataBytes: HCkByteData;
verified: Boolean;
bdOrigData: HCkBinData;

begin
crypt := CkCrypt2_Create();

// Encoding mode property must match the encoding of the detached signature.
CkCrypt2_putEncodingMode(crypt,'base64');

originalDataPath := 'c:/someDir/example.dat';
base64_detached_signature := '....';

// ------------------------------------------------------------------------
// The VerifyBytesENC method is deprecated:

originalDataBytes := CkByteData_Create();
CkByteData_loadFile(originalDataBytes,originalDataPath);

verified := CkCrypt2_VerifyBytesENC(crypt,originalDataBytes,base64_detached_signature);

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

bdOrigData := CkBinData_Create();
CkBinData_LoadFile(bdOrigData,originalDataPath);

verified := CkCrypt2_VerifyBdENC(crypt,bdOrigData,base64_detached_signature);

CkCrypt2_Dispose(crypt);
CkByteData_Dispose(originalDataBytes);
CkBinData_Dispose(bdOrigData);

end;