Only append PIN name to token label if necessary

There is no need to append PIN name to token label, if the
token has only one PIN object (occupies only one virtual slot).

src/pkcs11/framework-pkcs15.c

@@ -1108,6 +1108,17 @@ pkcs15_add_object(struct sc_pkcs11_slot *slot, struct pkcs15_any_object *obj,
 	obj->base.flags &= ~SC_PKCS11_OBJECT_RECURS;
 }
 
+static unsigned int
+get_num_slots(struct sc_card *card)
+{
+	unsigned int i;
+	for (i = 0; i < list_size(&virtual_slots); i++) {
+		sc_pkcs11_slot_t *slot = (sc_pkcs11_slot_t *)list_get_at(&virtual_slots, i);
+		if (slot && slot->p11card && slot->p11card->card == card)
+			return slot->p11card->num_slots;
+	}
+	return 0;
+}
 
 static void
 pkcs15_init_slot(struct sc_pkcs15_card *p15card, struct sc_pkcs11_slot *slot,
@@ -1159,7 +1170,7 @@ pkcs15_init_slot(struct sc_pkcs15_card *p15card, struct sc_pkcs11_slot *slot,
 			size_t pin_len = 0;
 			if (auth->label[0] && strncmp(auth->label, "PIN", 4) != 0)
 				pin_len = strlen(auth->label);
-			if (pin_len) {
+			if (pin_len && get_num_slots(p15card->card) > 1) {
 				size_t tokeninfo_len = 0;
 				if (p15card->tokeninfo && p15card->tokeninfo->label)
 					tokeninfo_len = strlen(p15card->tokeninfo->label);
@@ -1624,6 +1635,10 @@ pkcs15_create_tokens(struct sc_pkcs11_card *p11card, struct sc_app_info *app_inf
 	}
 	sc_log(context, "create slots flags 0x%X", cs_flags);
 
+	if (p11card) {
+		p11card->num_slots = 0;
+	}
+
 	/* Find out framework data corresponding to the given application */
 	fw_data = get_fw_data(p11card, app_info, &idx);
 	if (!fw_data)   {
@@ -1680,6 +1695,13 @@ pkcs15_create_tokens(struct sc_pkcs11_card *p11card, struct sc_app_info *app_inf
 		auth_count = rc;
 		sc_log(context, "Found %d authentication objects", auth_count);
 
+		for (i = 0; i < auth_count; i++) {
+			struct sc_pkcs15_auth_info *pin_info = (struct sc_pkcs15_auth_info *)auths[i]->data;
+			if (!_is_slot_auth_object(pin_info))
+				continue;
+			p11card->num_slots++;
+		}
+
 		for (i = 0; i < auth_count; i++) {
 			struct sc_pkcs15_auth_info *pin_info = (struct sc_pkcs15_auth_info*)auths[i]->data;
 			struct sc_pkcs11_slot *islot = NULL;
@@ -1703,6 +1725,10 @@ pkcs15_create_tokens(struct sc_pkcs11_card *p11card, struct sc_app_info *app_inf
 		}
 	}
 	else   {
+		if (auth_user_pin && (cs_flags & SC_PKCS11_SLOT_FOR_PIN_USER))
+			p11card->num_slots++;
+		if (auth_sign_pin && (cs_flags & SC_PKCS11_SLOT_FOR_PIN_SIGN))
+			p11card->num_slots++;
 		sc_log(context, "User/Sign PINs %p/%p", auth_user_pin, auth_sign_pin);
 		if (auth_user_pin && (cs_flags & SC_PKCS11_SLOT_FOR_PIN_USER)) {
 			/* For the UserPIN of the first slot create slot */

src/pkcs11/sc-pkcs11.h

@@ -201,6 +201,9 @@ struct sc_pkcs11_card {
 	/* List of supported mechanisms */
 	struct sc_pkcs11_mechanism_type **mechanisms;
 	unsigned int nmechanisms;
+
+	/* Number of virtual slots the card occupies */
+	unsigned int num_slots;
 };
 
 /* If the slot did already show with `C_GetSlotList`, then we need to keep this