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Fix insertion/removal detection
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pcsc now errors out of the SCardGetStatusChange call with
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SCARD_E_UNKNOWN_READER if any of the passed readers aren't known.
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This includes readers that were very recently forgotton about because
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a user just disconnected them.
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(See
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http://anonscm.debian.org/viewvc/pcsclite/trunk/PCSC/src/winscard_clnt.c?r1=5858&r2=5881
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for the change to pcsc)
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Unfortunately, this means SECMOD_WaitForAnyTokenEvent will fail with a
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SC_NO_EVENT error if a user removes their smartcard at the wrong time.
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This patch changes coolkey to detect removed readers before calling
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SCardGetStatusChange, so that it can handle the removal itself.
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diff -up coolkey-1.1.0/src/coolkey/slot.cpp.fix coolkey-1.1.0/src/coolkey/slot.cpp
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--- coolkey-1.1.0/src/coolkey/slot.cpp.fix 2013-05-22 16:23:41.728846957 -0400
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+++ coolkey-1.1.0/src/coolkey/slot.cpp 2013-05-22 17:09:59.813958927 -0400
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@@ -279,24 +279,22 @@ SlotList::updateReaderList()
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* don't recognize.
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*/
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- /* first though, let's check to see if any previously removed readers have
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- * come back from the dead. If the ignored bit has been set, we do not need
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- * it any more.
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- */
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+ /* Iterate through all the readers to see if we need to make unavailable any
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+ * freshly removed readers. Also, see if any previously removed
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+ * readers have come back from the dead and don't need to be ignored.
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+ */
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const char *curReaderName = NULL;
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unsigned long knownState = 0;
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for(int ri = 0 ; ri < numReaders; ri ++) {
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-
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knownState = CKYReader_GetKnownState(&readerStates[ri]);
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- if( !(knownState & SCARD_STATE_IGNORE)) {
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- continue;
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- }
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-
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+
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curReaderName = CKYReader_GetReaderName(&readerStates[ri]);
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if(readerNameExistsInList(curReaderName,&readerNames)) {
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CKYReader_SetKnownState(&readerStates[ri], knownState & ~SCARD_STATE_IGNORE);
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-
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+ } else {
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+ if (!(knownState & SCARD_STATE_UNAVAILABLE))
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+ CKYReader_SetKnownState(&readerStates[ri], knownState | SCARD_STATE_UNAVAILABLE | SCARD_STATE_CHANGED);
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}
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}
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@@ -1238,6 +1236,32 @@ SlotList::waitForSlotEvent(CK_FLAGS flag
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throw;
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}
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+ /* Before round-tripping to the daemon for the duration of the
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+ * timeout, first see if we lost any readers, and pick a slot
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+ * from that set to return
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+ */
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+ for (i=0; i < numReaders; i++) {
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+ unsigned long knownState = CKYReader_GetKnownState(&readerStates[i]);
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+
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+ if ((knownState & SCARD_STATE_UNAVAILABLE) &&
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+ (knownState & SCARD_STATE_CHANGED)) {
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+ CKYReader_SetKnownState(&readerStates[i], knownState & ~SCARD_STATE_CHANGED);
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+ readerListLock.releaseLock();
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+ *slotp = slotIndexToID(i);
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+ found = TRUE;
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+ break;
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+ }
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+ }
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+
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+ if (found) {
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+ break;
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+ }
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+
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+ if (shuttingDown) {
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+ readerListLock.releaseLock();
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+ break;
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+ }
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+
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if (myNumReaders != numReaders) {
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if (myReaderStates) {
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delete [] myReaderStates;
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