Hi,
opensc (reader-pcsc.c) uses the following code to determine that a smartcard
was removed and (another card) inserted again:
/* If we aren't sure if the card state changed, check if
* the card handle is still valid. If the card changed,
* the handle will be invalid. */
slot->flags &= ~SC_SLOT_CARD_CHANGED;
if (maybe_changed) {
if (old_flags & SC_SLOT_CARD_PRESENT) {
DWORD readers_len = 0, state, prot, atr_len =
32;
unsigned char atr[32];
LONG rv = SCardStatus(pslot->pcsc_card, NULL,
&readers_len,
&state, &prot, atr, &atr_len);
if (rv == (LONG)SCARD_W_REMOVED_CARD)
slot->flags |= SC_SLOT_CARD_CHANGED;
}
else
slot->flags |= SC_SLOT_CARD_CHANGED;
On Windows, SCardStatus (realised by MS) returns SCARD_W_REMOVED_CARD, and
everything is fine. On Linux, SCardStatus (realised by pcsc-lite) returns
SCARD_W_RESET_CARD. Does anybody have an idea which implementation "is right"?
Is it an issue of pcsc (return SCARD_W_REMOVED_CARD in any case), or opensc
which has to evaluate both (or maybe even other) returncodes?
Here is my environment:
Windows:
SPR 532 Cardreader, vendor supplied PC/SC-Driver for Windows, opensc,
engine-pkcs11, openssl
Linux:
SPR 532 Cardreader, pcsc-lite using vendor supplied PC/SC-Driver for Linux,
opensc, engine-pkcs11, openssl
Greetings,
Stefan Blomen
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