Delphi DLL

Workaround for the deprecated Crypt2.OpaqueVerifyBytes method

Shows how to replace the deprecated OpaqueVerifyBytes 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;
path: PWideChar;
inData: HCkByteData;
outData: HCkByteData;
bd: HCkBinData;

begin
success := False;

crypt := CkCrypt2_Create();

path := 'c:/someDir/example.p7m';

// ------------------------------------------------------------------------
// The OpaqueVerifyBytes method is deprecated:

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

outData := CkByteData_Create();

success := CkCrypt2_OpaqueVerifyBytes(crypt,inData,outData);

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

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

// If the opaque signature is validated, the contents of bd are replaced with the original data that was signed.
success := CkCrypt2_OpaqueVerifyBd(crypt,bd);

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

end;