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Comment:Added support for CKF_DONT_BLOCK
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SHA1: 0058a3b41b4de5a7e3b7a2e3336b6791e48fe8cb
User & Date: rkeene on 2013-08-18 07:02:27
Other Links: branch diff | manifest | tags
Context
2013-08-19
03:14
Improved waiting for slot event to allow C_Finalize to terminate any waiting Leaf check-in: d52881feec user: rkeene tags: wait-for-slot-event
2013-08-18
07:02
Added support for CKF_DONT_BLOCK check-in: 0058a3b41b user: rkeene tags: wait-for-slot-event
06:53
First work towards implementing C_WaitForSlotEvent check-in: 4d4946cc1f user: rkeene tags: wait-for-slot-event
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Modified cackey.c from [0817c7d1f8] to [5d076538a2].

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	SCARD_READERSTATE reader_states[(sizeof(cackey_slots) / sizeof(cackey_slots[0])) + 1];
	SCARDCONTEXT pcsc_handle;
	LONG scard_getstatchng_ret;
	LONG scard_est_context_ret;
	struct cackey_slot *cackey_slot;
	unsigned int currslot, reader_state_slot;
	int pcsc_connect_ret;


	CACKEY_DEBUG_PRINTF("Called.");

	if (pReserved != NULL) {
		CACKEY_DEBUG_PRINTF("Error. pReserved is not NULL.");

		return(CKR_ARGUMENTS_BAD);








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	SCARD_READERSTATE reader_states[(sizeof(cackey_slots) / sizeof(cackey_slots[0])) + 1];
	SCARDCONTEXT pcsc_handle;
	LONG scard_getstatchng_ret;
	LONG scard_est_context_ret;
	struct cackey_slot *cackey_slot;
	unsigned int currslot, reader_state_slot;
	int pcsc_connect_ret;
	int slot_changed;

	CACKEY_DEBUG_PRINTF("Called.");

	if (pReserved != NULL) {
		CACKEY_DEBUG_PRINTF("Error. pReserved is not NULL.");

		return(CKR_ARGUMENTS_BAD);
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	pcsc_connect_ret = cackey_pcsc_connect();
	if (pcsc_connect_ret != CACKEY_PCSC_S_OK) {
		CACKEY_DEBUG_PRINTF("Connection to PC/SC failed, returning in failure");

		return(CKR_GENERAL_ERROR);
	}

	if ((flags & CKF_DONT_BLOCK) == CKF_DONT_BLOCK) {
		/* XXX TODO */
		CACKEY_DEBUG_PRINTF("Returning CKR_GENERAL_ERROR (%i) because we were asked to not block", CKR_GENERAL_ERROR);

		return(CKR_GENERAL_ERROR);
	} else {
		for (reader_state_slot = currslot = 0; currslot < (sizeof(cackey_slots) / sizeof(cackey_slots[0])); currslot++) {
			if (cackey_slots[currslot].internal) {
				continue;
			}

			if (cackey_slots[currslot].active == 0) {
				continue;
			}

			reader_states[reader_state_slot].szReader = cackey_slots[currslot].pcsc_reader;
			reader_states[reader_state_slot].pvUserData = &cackey_slots[currslot];




			reader_states[reader_state_slot].dwCurrentState = cackey_slots[currslot].pcsc_state;


			reader_state_slot++;
		}

		reader_states[reader_state_slot].szReader = "\\\\?PnP?\\Notification";
		reader_states[reader_state_slot].pvUserData = NULL;
		reader_states[reader_state_slot].dwCurrentState = SCARD_STATE_UNAWARE;
		reader_state_slot++;

		scard_est_context_ret = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &pcsc_handle);
		if (scard_est_context_ret != SCARD_S_SUCCESS) {
			CACKEY_DEBUG_PRINTF("Returning CKR_GENERAL_ERROR (%i) because SCardEstablishContext failed: %lx", CKR_GENERAL_ERROR, scard_est_context_ret);

			return(CKR_GENERAL_ERROR);
		}

		scard_getstatchng_ret = SCardGetStatusChange(pcsc_handle, INFINITE, reader_states, reader_state_slot);

		SCardReleaseContext(pcsc_handle);

		if (scard_getstatchng_ret != SCARD_S_SUCCESS) {
			CACKEY_DEBUG_PRINTF("Returning CKR_GENERAL_ERROR (%i) because SCardGetStatusChange failed: %lx", CKR_GENERAL_ERROR, scard_getstatchng_ret);

			return(CKR_GENERAL_ERROR);
		}

		for (currslot = 0; currslot < reader_state_slot; currslot++) {
			CACKEY_DEBUG_PRINTF("[slot = %u] CurrentState = %lx, EventState = %lx",
			    currslot,
			    reader_states[currslot].dwCurrentState & 0xffff,
			    reader_states[currslot].dwEventState & 0xffff
			);

			if (reader_states[currslot].dwCurrentState != reader_states[currslot].dwEventState) {
				cackey_slot = (struct cackey_slot *) reader_states[currslot].pvUserData;

				if (cackey_slot == NULL) {
					/* XXX: TODO: Someone plugged in a new slot */
					continue;
				}

















				CACKEY_DEBUG_PRINTF("Returning slot changed: %u", (unsigned int) cackey_slot->id);

				cackey_slot->pcsc_state = reader_states[currslot].dwEventState;
				*pSlotID = (CK_SLOT_ID) cackey_slot->id;

				CACKEY_DEBUG_PRINTF("Returning CKR_OK (%i)", CKR_OK);

				return(CKR_OK);
			}
		}


	}


	CACKEY_DEBUG_PRINTF("Returning CKR_FUNCTION_NOT_SUPPORTED (%i)", CKR_FUNCTION_NOT_SUPPORTED);

	return(CKR_FUNCTION_NOT_SUPPORTED);
}

CK_DEFINE_FUNCTION(CK_RV, C_GetMechanismList)(CK_SLOT_ID slotID, CK_MECHANISM_TYPE_PTR pMechanismList, CK_ULONG_PTR pulCount) {
	CACKEY_DEBUG_PRINTF("Called.");

	if (!cackey_initialized) {
		CACKEY_DEBUG_PRINTF("Error.  Not initialized.");








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	pcsc_connect_ret = cackey_pcsc_connect();
	if (pcsc_connect_ret != CACKEY_PCSC_S_OK) {
		CACKEY_DEBUG_PRINTF("Connection to PC/SC failed, returning in failure");

		return(CKR_GENERAL_ERROR);
	}







	for (reader_state_slot = currslot = 0; currslot < (sizeof(cackey_slots) / sizeof(cackey_slots[0])); currslot++) {
		if (cackey_slots[currslot].internal) {
			continue;
		}

		if (cackey_slots[currslot].active == 0) {
			continue;
		}

		reader_states[reader_state_slot].szReader = cackey_slots[currslot].pcsc_reader;
		reader_states[reader_state_slot].pvUserData = &cackey_slots[currslot];

		if ((flags & CKF_DONT_BLOCK) == CKF_DONT_BLOCK) {
			reader_states[reader_state_slot].dwCurrentState = SCARD_STATE_UNAWARE;
		} else {
			reader_states[reader_state_slot].dwCurrentState = cackey_slots[currslot].pcsc_state;
		}

		reader_state_slot++;
	}

	reader_states[reader_state_slot].szReader = "\\\\?PnP?\\Notification";
	reader_states[reader_state_slot].pvUserData = NULL;
	reader_states[reader_state_slot].dwCurrentState = SCARD_STATE_UNAWARE;
	reader_state_slot++;

	scard_est_context_ret = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &pcsc_handle);
	if (scard_est_context_ret != SCARD_S_SUCCESS) {
		CACKEY_DEBUG_PRINTF("Returning CKR_GENERAL_ERROR (%i) because SCardEstablishContext failed: %lx", CKR_GENERAL_ERROR, scard_est_context_ret);

		return(CKR_GENERAL_ERROR);
	}

	scard_getstatchng_ret = SCardGetStatusChange(pcsc_handle, INFINITE, reader_states, reader_state_slot);

	SCardReleaseContext(pcsc_handle);

	if (scard_getstatchng_ret != SCARD_S_SUCCESS) {
		CACKEY_DEBUG_PRINTF("Returning CKR_GENERAL_ERROR (%i) because SCardGetStatusChange failed: %lx", CKR_GENERAL_ERROR, scard_getstatchng_ret);

		return(CKR_GENERAL_ERROR);
	}

	for (currslot = 0; currslot < reader_state_slot; currslot++) {
		CACKEY_DEBUG_PRINTF("[slot = %u] CurrentState = %lx, EventState = %lx",
		    currslot,
		    reader_states[currslot].dwCurrentState & 0xffff,
		    reader_states[currslot].dwEventState & 0xffff
		);


		cackey_slot = (struct cackey_slot *) reader_states[currslot].pvUserData;

		if (cackey_slot == NULL) {
			/* XXX: TODO: Someone plugged in a new slot */
			continue;
		}

		slot_changed = 0;

		if ((flags & CKF_DONT_BLOCK) == CKF_DONT_BLOCK) {
			if (cackey_slot->pcsc_state != reader_states[currslot].dwEventState) {
				slot_changed = 1;
			}
		} else {
			if (reader_states[currslot].dwCurrentState != reader_states[currslot].dwEventState) {
				slot_changed = 1;
			}
		}

		if (slot_changed == 0) {
			continue;
		}

		CACKEY_DEBUG_PRINTF("Returning slot changed: %u", (unsigned int) cackey_slot->id);

		cackey_slot->pcsc_state = reader_states[currslot].dwEventState;
		*pSlotID = (CK_SLOT_ID) cackey_slot->id;

		CACKEY_DEBUG_PRINTF("Returning CKR_OK (%i)", CKR_OK);

		return(CKR_OK);
	}

	if ((flags & CKF_DONT_BLOCK) != CKF_DONT_BLOCK) {
		CACKEY_DEBUG_PRINTF("Returning CKR_NO_EVENT (%i), but asked to block !? BUG ENCOUNTERED.", CKR_NO_EVENT);
	} else {
		CACKEY_DEBUG_PRINTF("Returning CKR_NO_EVENT (%i)", CKR_NO_EVENT);
	}


	return(CKR_NO_EVENT);
}

CK_DEFINE_FUNCTION(CK_RV, C_GetMechanismList)(CK_SLOT_ID slotID, CK_MECHANISM_TYPE_PTR pMechanismList, CK_ULONG_PTR pulCount) {
	CACKEY_DEBUG_PRINTF("Called.");

	if (!cackey_initialized) {
		CACKEY_DEBUG_PRINTF("Error.  Not initialized.");
︙︙

Modified test.c from [1ccfa3a69d] to [ef0e023dd5].

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	slots = malloc(sizeof(*slots) * numSlots);

	chk_rv = C_GetSlotList(FALSE, slots, &numSlots);
	if (chk_rv != CKR_OK) {
		return(1);
	}


	currSlot = 0;
	printf("Please insert a card now.\n");





	chk_rv = C_WaitForSlotEvent(0, &currSlot, NULL);
	if (chk_rv != CKR_OK) {
		printf("Failed to wait for slot event.\n");
	}




	for (currSlot = 0; currSlot < numSlots; currSlot++) {
		printf("  Slot %lu:\n", currSlot);

		chk_rv = C_GetSlotInfo(slots[currSlot], &slotInfo);
		if (chk_rv != CKR_OK) {
			return(1);
		}








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	slots = malloc(sizeof(*slots) * numSlots);

	chk_rv = C_GetSlotList(FALSE, slots, &numSlots);
	if (chk_rv != CKR_OK) {
		return(1);
	}

	/* Test waiting for slot events */
	currSlot = 0;
	printf("Please insert a card now.\n");

	/* Initially, every slot has changed state (but probably should not) */
	chk_rv = C_WaitForSlotEvent(0, &currSlot, NULL);

	/* This actually waits */
	chk_rv = C_WaitForSlotEvent(0, &currSlot, NULL);
	if (chk_rv != CKR_OK) {
		printf("Failed to wait for slot event.\n");
	}

	/* This just ensures DONT_BLOCK works */
	chk_rv = C_WaitForSlotEvent(CKF_DONT_BLOCK, &currSlot, NULL);

	for (currSlot = 0; currSlot < numSlots; currSlot++) {
		printf("  Slot %lu:\n", currSlot);

		chk_rv = C_GetSlotInfo(slots[currSlot], &slotInfo);
		if (chk_rv != CKR_OK) {
			return(1);
		}
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