(Delphi DLL) Transition from Crypt2.GetSignerCertChain to Crypt2.LastSignerCert

Provides instructions for replacing deprecated GetSignerCertChain method calls with LastSignerCert.

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, CertChain, Cert, Crypt2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
crypt2: HCkCrypt2;
index: Integer;
certchainObj: HCkCertChain;
signerCert: HCkCert;
success: Boolean;
certChain: HCkCertChain;

begin
crypt2 := CkCrypt2_Create();

// ...
// ...
index := 0;

// ------------------------------------------------------------------------
// The GetSignerCertChain method is deprecated:

certchainObj := CkCrypt2_GetSignerCertChain(crypt2,index);
if (CkCrypt2_getLastMethodSuccess(crypt2) = False) then
  begin
    Memo1.Lines.Add(CkCrypt2__lastErrorText(crypt2));
    Exit;
  end;

// ...
// ...

CkCertChain_Dispose(certchainObj);

// ------------------------------------------------------------------------
// Do the equivalent using LastSignerCert, and then get the certificate chain from the cert.
// Your application creates a new, empty Cert object which is passed 
// in the last argument and filled upon success.

signerCert := CkCert_Create();
success := CkCrypt2_LastSignerCert(crypt2,index,signerCert);
if (success = False) then
  begin
    Memo1.Lines.Add(CkCrypt2__lastErrorText(crypt2));
    Exit;
  end;

certChain := CkCertChain_Create();
success := CkCert_BuildCertChain(signerCert,certChain);
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(signerCert));
    Exit;
  end;

CkCrypt2_Dispose(crypt2);
CkCert_Dispose(signerCert);
CkCertChain_Dispose(certChain);

end;