Settings services

set

Cmd	Name
0	GetLanguageCode
1	SetLanguageCode
3
4

set:cal

Cmd	Name
14	GetDeviceCert
15	GetDeviceCert2
16	GetTLSClientPrivk
17	GetTLSClientCert

Used for accessing data calibrated at the factory. Probably only for console-unique data?(Everything read so far has been console-unique)

GetDeviceCert

Takes a type-0x16 output buffer with fixed size 0x180.

Returns the DeviceCert. This is identical to 3DS DeviceCert/CTCert besides the strings. NIM loads the DeviceId from this.

GetDeviceCert2

Takes a type-0x16 output buffer with fixed size 0x240.

Same as GetDeviceCert, except this returns more data and the data starts differing at offset 0x108 compared to GetDeviceCert.

GetTLSClientPrivk

Takes a type-0x16 output buffer with fixed size 0x134.

Returns a container-structure for the encrypted TLS client-privk. Decrypting this fails unless an unknown size >0x134 is passed to this setcal cmd?

Used by SSL-sysmodule, see here.

GetTLSClientCert

Takes a type-0x16 output buffer with fixed size 0x804.

Returns a container-structure for the plaintext TLS client-cert.

Used by SSL-sysmodule, see here.

setcal Container Structure

Offset	Size	Name
0x0	0x4	Size (same size used for decryption if needed)
0x4	{above size}	Actual data starts here.

set:sys

Cmd	Name
3	GetSystemVersion
37	QuerySetting
38	ReadSetting
56	GetWirelessCertification
68	GetSerialNumber

Official user-processes get a new service session handle each time a set:sys cmd is used, with the session being closed aftewards.

ReadSetting

Takes two type-0x19 input buffers and a type-0x6 output buffer.

GetSystemVersion

Takes a type-0x1A output buffer. User-processes use hard-coded size 0x100.

Returns the content of the System_Version_Title "/file".

GetSerialNumber

Returns the 0x18-byte SerialNumber string.