Delphi DLL

Workaround for the deprecated Crypt2.OpaqueSignString method

Shows how to replace the deprecated OpaqueSignString 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, Cert, CkByteData, Crypt2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
crypt: HCkCrypt2;
cert: HCkCert;
textToSign: PWideChar;
outData: HCkByteData;
base64_sig: PWideChar;
bd: HCkBinData;

begin
success := False;

crypt := CkCrypt2_Create();

cert := CkCert_Create();
// ...
// Load the cert from a source such as a .pfx/.p12 file, smart card, USB token, Apple keychain, Windows certificate store, etc.
// 
success := CkCrypt2_SetSigningCert(crypt,cert);

// Sign the utf-8 byte representation of the text.
CkCrypt2_putCharset(crypt,'utf-8');

textToSign := 'This is the text to sign';

// ------------------------------------------------------------------------
// The OpaqueSignString method is deprecated:

outData := CkByteData_Create();

success := CkCrypt2_OpaqueSignString(crypt,textToSign,outData);

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

CkCrypt2_putEncodingMode(crypt,'base64');
base64_sig := CkCrypt2__opaqueSignStringENC(crypt,textToSign);

bd := CkBinData_Create();
CkBinData_AppendEncoded(bd,base64_sig,'base64');

// Access the raw bytes from bd.

CkCrypt2_Dispose(crypt);
CkCert_Dispose(cert);
CkByteData_Dispose(outData);
CkBinData_Dispose(bd);

end;