nfcd is a daemon running under the mobile user. It handles the communications between PassKit and the underlying hardware and libraries.
The core objects in it are:
- NFDaemon
- NFFieldDetectController
- NFCoreTelephonyConnection
- NFPowerManager
- NFAbstractController
- NFCardEmulationController
- NFSecureElementController
NFDaemon - (void)XPCConnection:(id) didReceiveCommand:(id)
Launchd plist
{
EnablePressuredExit = 1;
EnableTransactions = 1;
ExitTimeOut = 45;
Label = "com.apple.nfcd";
MachServices = {
"com.apple.nfcd" = 1;
};
ProcessType = Interactive;
Program = "/usr/libexec/nfcd";
UserName = mobile;
}
Where the XPC service is registered under the "com.apple.nfcd" name
Supported XPC Commands
| ID | Command |
|---|---|
| 1 | q_registerConnection:info: |
| 2 | q_unregisterConnection: |
| 3-64 | send command to SE controller |
| 65 | q_updateSecureElementPowerState |
| 66 | _seIsInRestrictedMode |
| 67 | restrictedModeChanged |
| 68-239 | callSEContoller |
| 240 | setDeviceString |
| 241 | q_getControllerInfo |
| 242 | q_getSecureElementInfo |
| 243 | q_getBoosterInfo |
| 244 | q_readBoosterRegister |
| 245 | q_sendBoosterCommand |
| 246 | q_triggerAssertion |
| >247 | throw error |
These are formatted into a JSON list i.e.
{
command = 1;
}