NPDM
This is the Switch equivalent of 3DS exheader. This is the file with extension ".npdm" in {Switch ExeFS}. The size of this file varies.
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x80 | META |
| 0x80 | 0x200 | RSA-2048 signature, followed a RSA-2048 modulus for NCA header (like 3DS) |
| 0x280 | <Varies> | ACID |
| <See META> | <See META> | ACI0 |
META
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x4 | Magicnum "META". |
| 0x20 | ? | Name string |
| 0x70 | 0x4 | Absolute offset for ACI0. |
| 0x74 | 0x4 | Size of ACI0. |
| 0x78 | 0x4 | Absolute offset of the RSA signature. |
| 0x7C | 0x4 | Size used with the above offset. Offset+size is normally ACI0_start-8. |
Switch version of 3DS "System Control Info"?
ACID
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x4 | Magicnum "ACID". |
| 0x4 | 0x28 | ? |
| 0x2C | 0x4 | Size of the Service Access Control. |
| 0x30 | 0xC0 | ? |
| 0xF0 | <See above> | Service Access Control |
Switch version of AccessDesc?
ACI0
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x4 | Magicnum "ACI0". |
| 0x4 | 0x28 | ? |
| 0x2C | 0x4 | Size of the Service Access Control. |
| 0x30 | 0x34 | ? |
| 0x60 | <See above> | Service Access Control |
Switch version of 3DS ACI(Access Control Info)?
Service Access Control
This is a list of service-name strings which the title has access to, with the following structure:
+0: control_byte
+1: {service-name without nul-terminator}
Bitmask 0x0F in control_byte is the {length of the service-name without nul-terminator} - 1.
Bitmask 0x80 in control_byte means service is allowed to be registered.
The service string can contain a wildcard * character.