Delphi ActiveX

ScMinidriver - List Certificates on a Smart Card or USB Token

See more ScMinidriver Examples

Gets a list of certificates contained on a smart card or USB token. Delphi ActiveX

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
success: Integer;
scmd: TChilkatScMinidriver;
readerName: WideString;
stCerts: TChilkatStringTable;
certPart: WideString;
numCerts: Integer;
i: Integer;

begin
success := 0;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

scmd := TChilkatScMinidriver.Create(Self);

// Reader names (smart card readers or USB tokens) can be discovered
// via PCSC List Readers or PCSC Find Smart Cards
readerName := 'SCM Microsystems Inc. SCR33x USB Smart Card Reader 0';
success := scmd.AcquireContext(readerName);
if (success = 0) then
  begin
    Memo1.Lines.Add(scmd.LastErrorText);
    Exit;
  end;

stCerts := TChilkatStringTable.Create(Self);

// We can choose one of the following items of information to get for each certificate:
// "subjectDN" -- Return the full distinguished name of the cert.
// "subjectDN_withTags" -- Same as above, but in a format that includes the subject part tags, such as the "CN=" in "CN=something"
// "subjectCN" -- Return just the common name part of the certificate's subject.
// "serial" -- Return the certificate serial number.
// "serial:issuerCN" -- return the certificate serial number + the issuer's common name, delimited with a colon char.
certPart := 'subjectCN';

success := scmd.ListCerts(certPart,stCerts.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(scmd.LastErrorText);
    Exit;
  end;

numCerts := stCerts.Count;
i := 0;
while i < numCerts do
  begin
    Memo1.Lines.Add(IntToStr(i) + ': ' + stCerts.StringAt(i));
    i := i + 1;
  end;

// Delete the context when finished with the card.
success := scmd.DeleteContext();
if (success = 0) then
  begin
    Memo1.Lines.Add(scmd.LastErrorText);
  end;
end;