Delphi DLL

Workaround for the deprecated Crypt2.VerifyBytes method

Shows how to replace the deprecated VerifyBytes 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
crypt: HCkCrypt2;
sigPath: PWideChar;
originalDataPath: PWideChar;
detachedSigBytes: HCkByteData;
originalDataBytes: HCkByteData;
verified: Boolean;
bdSig: HCkBinData;
bdOrigData: HCkBinData;
encoding: PWideChar;

begin
crypt := CkCrypt2_Create();

sigPath := 'c:/someDir/example.p7s';
originalDataPath := 'c:/someDir/example.dat';

// ------------------------------------------------------------------------
// The VerifyBytes method is deprecated:

detachedSigBytes := CkByteData_Create();
CkByteData_loadFile(detachedSigBytes,sigPath);

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

verified := CkCrypt2_VerifyBytes(crypt,originalDataBytes,detachedSigBytes);

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

bdSig := CkBinData_Create();
CkBinData_LoadFile(bdSig,sigPath);

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

encoding := 'base64';
CkCrypt2_putEncodingMode(crypt,encoding);
verified := CkCrypt2_VerifyBdENC(crypt,bdOrigData,CkBinData__getEncoded(bdSig,encoding));

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

end;