(Delphi ActiveX) Find Certificate for Email Address in Current-User Certificate Store (Windows-Only)

This is a Windows-only example to find a certificate for a given email address in the current-user certificate store (located in the Windows Registry).

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
certStore: TChilkatCertStore;
readOnly: Integer;
success: Integer;
emailAddr: WideString;
cert: IChilkatCert;

begin
// This is a Windows-only example because it lists the certificates
// stored in the Windows Current User Certificate Store located in the
// Windows Registry.

certStore := TChilkatCertStore.Create(Self);

readOnly := 1;
success := certStore.OpenCurrentUserStore(readOnly);
if (success = 0) then
  begin
    Memo1.Lines.Add(certStore.LastErrorText);
    Exit;
  end;

emailAddr := 'support@chilkatsoft.com';
cert := certStore.FindCertBySubjectE(emailAddr);
if (certStore.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add('No certificate found for ' + emailAddr);
    Exit;
  end;

Memo1.Lines.Add('Found: ' + cert.SubjectDN);

// It should be case-insensitive, however it was found not to be.
// The case-insensitive search is fixed starting in Chilkat v9.5.0.65.
emailAddr := 'SUPPORT@chilkatsoft.com';
cert := certStore.FindCertBySubjectE(emailAddr);
if (certStore.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add('No certificate found for ' + emailAddr);
    Exit;
  end;

Memo1.Lines.Add('Found: ' + cert.SubjectDN);
end;