Fails to load tokens when there are unrecognized ones

[dalmohub]

After configuring Windows Hello for business, a certificate was created in my PC which is somehow identified as a token by Bit4Id (PKCS#11 library).

Since then I'm unable to access my actual PKCS#11 USB Token because Pkcs11X509Store.Slots throws an exception due to the bogus Windows Hello token. The error happens in Pkcs11Token.GetTokenContext when calling Slot.GetTokenInfo() which throws a Pkcs11Exception exception => CKR_TOKEN_NOT_RECOGNIZED.

The error handling below allows "good" tokens to be loaded regardless of the presence of "invalid" ones.

private List<Pkcs11Slot> GetSlots()
{
	var slots = new List<Pkcs11Slot>();

	foreach (ISlot slot in _storeContext.Pkcs11Library.GetSlotList(SlotsType.WithTokenPresent))
	{
		try
		{
			var pkcs11Slot = new Pkcs11Slot(slot, _storeContext);
			slots.Add(pkcs11Slot);
		}
		catch (Pkcs11Exception ex)
		{
			if (ex.RV != CKR.CKR_TOKEN_NOT_RECOGNIZED && ex.RV != CKR.CKR_TOKEN_NOT_PRESENT)
			{
				throw;
			}
		}
	}

	return slots;
}

[lucaquaglio]

Up

[lucaquaglio]

Created PR for the issue #35

[jariq]

@dalmohub thanks for reporting. Fix will be included in Pkcs11Interop.X509Store 0.5.0.