Delphi DLL

Find Certificate by Email Address

Locate the certificate containing the specified email address in either the RFC822 Name or the Subject.

Note: This example requires Chilkat v10.1.2 or later.

Delphi DLL

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
certStore: HCkCertStore;
readOnly: Boolean;
json: HCkJsonObject;
email_address: PWideChar;
cert: HCkCert;

begin
success := False;

certStore := CkCertStore_Create();

// This opens the Current User certificate store on Windows,
// On MacOS and iOS it opens the default Keychain.
readOnly := True;
success := CkCertStore_OpenCurrentUserStore(certStore,readOnly);
if (success = False) then
  begin
    Memo1.Lines.Add(CkCertStore__lastErrorText(certStore));
    Exit;
  end;

// Locate the certificate containing the specified email address in either the RFC822 Name or the Subject.
json := CkJsonObject_Create();
email_address := 'harold@example.com';
CkJsonObject_UpdateString(json,'email',email_address);

cert := CkCert_Create();
success := CkCertStore_FindCert(certStore,json,cert);
if (success = True) then
  begin
    // Show the full distinguished name of the certificate.
    Memo1.Lines.Add('Found: ' + CkCert__subjectDN(cert));
  end
else
  begin
    Memo1.Lines.Add('Not found.');
  end;

CkCertStore_Dispose(certStore);
CkJsonObject_Dispose(json);
CkCert_Dispose(cert);

end;