/// <summary>
/// Find all supported smartcard types
/// </summary>
/// <returns>List of supported card types</returns>
private List <string> FetchCards()
{
var cardLen = 16384;
var cards = new char[cardLen];
var result = SmartcardInterop.SCardListCardsW(this.readerContext, null, IntPtr.Zero, 0, cards, out cardLen);
if (result != SmartcardException.SCardSuccess)
{
this.logger.ErrorFormat("Failed to fetch smartcard names, result = 0x{0:X}", result);
throw new SmartcardException(result);
}
var c = SmartcardInterop.MultiStringToArray(cards);
if (this.logger.IsDebugEnabled)
{
this.logger.DebugFormat("Known cards; count = {0}", c.Count);
foreach (var card in c)
{
this.logger.DebugFormat(" {0}", card);
}
}
return(c.ToList());
}
/// <summary>
/// Locate the smartcard type with the identified ATR bytes
/// </summary>
/// <param name="atr">ATR byte array</param>
/// <returns>Cardname matching the ATR</returns>
private string FindCardWithAtr(byte[] atr)
{
var cardLen = 1024;
var cards = new char[cardLen];
var result = SmartcardInterop.SCardListCardsW(IntPtr.Zero, atr, IntPtr.Zero, 0, cards, out cardLen);
if (result != SmartcardException.SCardSuccess)
{
this.logger.DebugFormat("Failed to find smartcard by ATR: error 0x{0}", result);
throw new SmartcardException(result);
}
var card = SmartcardInterop.MultiStringToArray(cards);
if (card.Count == 0)
{
throw new SmartcardException(SmartcardException.SCardECardUnsupported);
}
if (card.Count > 1)
{
throw new SmartcardException(SmartcardException.SCardEUnexpected);
}
return(card[0]);
}
/// <summary>
/// Find all attached smartcard readers
/// </summary>
/// <returns>List of attached readers</returns>
private List <string> FetchReaders()
{
var readerLen = 1024;
var readers = new char[readerLen];
var result = SmartcardInterop.SCardListReadersW(this.readerContext, null, readers, out readerLen);
if (result != SmartcardException.SCardSuccess && result != SmartcardException.SCardENoReadersAvailable)
{
this.logger.ErrorFormat("Failed to fetch smartcard readers, result = 0x{0:X}", result);
throw new SmartcardException(result);
}
var r = SmartcardInterop.MultiStringToArray(readers);
if (this.logger.IsDebugEnabled)
{
this.logger.DebugFormat("Known readers; count = {0}", r.Count);
foreach (var reader in r)
{
this.logger.DebugFormat(" {0}", reader);
}
}
return(r.ToList());
}