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Auth Applet

This is the Parental Controls authentication applet. This applet is used by qlaunch. See AM_services#Library_Applets.

Library Applet Versions

System Version Value
[1.0.0+] 0x1
[4.0.0+] 0x2


Offset Size Description
0x0 0x4 Always set to 0 by the user-process.
0x4 0x4 Type
0x8 0x3 u8 arg0, arg1, arg2
0xB 0x1 Padding

The arg storage is 0xC-bytes.


  • 0x0 ShowParentalAuthentication: With the (bool) func, arg0 is set to the input bool, with the rest set to zero. false = temporarily disable Parental Controls. true = validate the input PIN.
    • With the other func available with [4.0.0+], 3 u8s from the input struct are copied to the u8 arg fields. The ShowAuthenticatorForConfiguration wrapper func for this passes the following arg* values: 1, 0, 1. This is for checking the PIN, used when changing system-settings.
  • 0x1 RegisterParentalPasscode: arg* fields are all-zero. This is for registering the Parental Controls PIN.
  • 0x2 ChangeParentalPasscode: arg* fields are all-zero. This is for changing the Parental Controls PIN.

If non-Register is used where a PIN is not already registered, the applet will throw a fatalerr once the user finishes entering the PIN (unknown for ShowAuthenticatorForConfiguration).


User-processes should push a common arguments struct as well as the #Arg struct. Once the applet finishes running successfully, it will return an output 4-byte storage containing the Result (an error is thrown if no storage is available / storage size is 0).