securityd/securityd_service/KeyStore/KeyStoreEvents.c

   1 /* Copyright (c) 2013 Apple Inc. All Rights Reserved. */
   2
   3 #include "AppleKeyStoreEvents.h"
   4
   5 #include <unistd.h>
   6 #include <notify.h>
   7 #include <syslog.h>
   8 #include <AssertMacros.h>
   9 #include <IOKit/IOKitLib.h>
  10 #include <Kernel/IOKit/crypto/AppleKeyStoreDefs.h>
  11 #include <xpc/event_private.h>
  12 #include <os/log.h>
  13
  14 static void aksNotificationCallback(void *refcon,io_service_t service, natural_t messageType, void *messageArgument)
  15 {
  16         if(messageType == kAppleKeyStoreLockStateChangeMessage) {
  17         os_log(OS_LOG_DEFAULT, "KeyStoreNotifier posting lockstate change");
  18                 notify_post(kAppleKeyStoreLockStatusNotificationID);
  19         } else if (messageType == kAppleKeyStoreFirstUnlockMessage) {
  20         os_log(OS_LOG_DEFAULT, "KeyStoreNotifier posting first unlock");
  21                 notify_post(kAppleKeyStoreFirstUnlockNotificationID);
  22     }
  23 }
  24
  25 static void start(dispatch_queue_t queue)
  26 {
  27         IOReturn result;
  28         io_service_t aksService = IO_OBJECT_NULL;
  29         IONotificationPortRef aksNotifyPort = NULL;
  30         io_object_t notification = IO_OBJECT_NULL;
  31
  32         aksService = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching(kAppleKeyStoreServiceName));
  33         require_action(aksService, cleanup, syslog(LOG_ERR, "KeyStoreNotifier - Can't find %s service", kAppleKeyStoreServiceName));
  34
  35         aksNotifyPort = IONotificationPortCreate(kIOMasterPortDefault);
  36         require_action(aksNotifyPort, cleanup, syslog(LOG_ERR, "KeyStoreNotifier - Can't create notification port"));
  37
  38     IONotificationPortSetDispatchQueue(aksNotifyPort, queue);
  39
  40         result = IOServiceAddInterestNotification(aksNotifyPort, aksService, kIOGeneralInterest, aksNotificationCallback, NULL, &notification);
  41         require_noerr_action(result, cleanup, syslog(LOG_ERR, "KeyStoreNotifier - Can't register for notification: %08x", result));
  42         return;
  43
  44 cleanup:
  45         if (aksNotifyPort) IONotificationPortDestroy(aksNotifyPort);
  46     if (notification) IOObjectRelease(notification);
  47     if (aksService) IOObjectRelease(aksService);
  48         return;
  49 }
  50
  51 void
  52 init_keystore_events(xpc_event_module_t module)
  53 {
  54     start(xpc_event_module_get_queue(module));
  55 }