(Delphi DLL) Transition from Email.GetSignedByCertChain to Email.LastSignerCert

Provides instructions for replacing deprecated GetSignedByCertChain 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, Email;

...

procedure TForm1.Button1Click(Sender: TObject);
var
email: HCkEmail;
certChainObj: HCkCertChain;
signerCert: HCkCert;
success: Boolean;
certChain: HCkCertChain;

begin
email := CkEmail_Create();

// ...
// ...

// ------------------------------------------------------------------------
// The GetSignedByCertChain method is deprecated:

certChainObj := CkEmail_GetSignedByCertChain(email);
if (CkEmail_getLastMethodSuccess(email) = False) then
  begin
    Memo1.Lines.Add(CkEmail__lastErrorText(email));
    Exit;
  end;

// ...
// ...

CkCertChain_Dispose(certChainObj);

// ------------------------------------------------------------------------
// Do the equivalent using LastSignerCert to get the signing certificate,
// then build the cert chain from the signing certificate object.

signerCert := CkCert_Create();
success := CkEmail_LastSignerCert(email,0,signerCert);
if (success = False) then
  begin
    Memo1.Lines.Add(CkEmail__lastErrorText(email));
    Exit;
  end;

// Get the certificate chain from the signer certificate.
certChain := CkCertChain_Create();
success := CkCert_BuildCertChain(signerCert,certChain);
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(signerCert));
    Exit;
  end;

CkEmail_Dispose(email);
CkCert_Dispose(signerCert);
CkCertChain_Dispose(certChain);

end;