NPDM: Difference between revisions

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Document FS Access Control
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= FS Access Control =
= FS Access Control =
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 0x4
| Version (usually 1).
|-
| 0x4
| 0x8
| FS Access Rights
|-
| 0xC
| 0x4
| ContentOwnerIds start offset
|-
| 0x10
| 0x4
| ContentOwnerIds end offset
|-
| 0x14
| 0x4
| SaveDataOwnerIds start offset
|-
| 0x18
| 0x4
| SavaDataOwnerIds end offset
|}


=== FS Access Rights ===
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
! Word
! Bit and bitmask
! Bit
! Description
! Description
|-
|-
| 0
| <code>0</code>, <code>0x1</code>
|
| ApplicationInfo (MountContent* is accessible when set)
| Version? Always 1.
|-
| <code>1</code>, <code>0x2</code>
| BootModeControl
|-
| <code>2</code>, <code>0x4</code>
| Calibration (Enables access to [[Filesystem_services|Bis]] partitionID 27 and 28)
|-
| <code>3</code>, <code>0x8</code>
| SystemSaveData
|-
| <code>4</code>, <code>0x10</code>
| GameCard
|-
| <code>5</code>, <code>0x20</code>
| SaveDataBackup
|-
| <code>6</code>, <code>0x40</code>
| SaveDataManagement
|-
| <code>7</code>, <code>0x80</code>
| BisAllRaw
|-
| <code>8</code>, <code>0x100</code>
| GameCardRaw
|-
| <code>9</code>, <code>0x200</code>
| GameCardPrivate
|-
| <code>10</code>, <code>0x400</code>
| SetTime
|-
| <code>11</code>, <code>0x800</code>
| ContentManager
|-
| <code>12</code>, <code>0x1000</code>
| ImageManager
|-
| <code>13</code>, <code>0x2000</code>
| CreateSaveData
|-
| <code>14</code>, <code>0x4000</code>
| SystemSaveDataManagement
|-
| <code>15</code>, <code>0x8000</code>
| BisFileSystem
|-
| <code>16</code>, <code>0x10000</code>
| SystemUpdate
|-
| <code>17</code>, <code>0x20000</code>
| SaveDataMeta
|-
| <code>18</code>, <code>0x40000</code>
| DeviceSaveControl
|-
| <code>19</code>, <code>0x80000</code>
| SettingsControl
|-
|-
| 1
| <code>62</code>, <code>0x4000000000000000</code>
| 0
| Debug
| MountContent* is accessible when set.
|-
|-
| 1
| <code>63</code>, <code>0x8000000000000000</code>
| 2
| FullPermission
| Enables access to [[Filesystem_services|Bis]] partitionID 27 and 28?
|}
|}


Web-applets access control:
Web-applets access control:
* "LibAppletWeb" and "LibAppletOff" have same access control: word0 bit0 set, word1 bit0 and bit3 set, and word2 bit30 set.
* "LibAppletWeb" and "LibAppletOff" have same access control: word0 bit0 set, '''ApplicationInfo''' and '''SystemSaveData''' set, and '''Debug''' set.
* Rest of the web-applets: Same as above except word1 bit0 isn't set.
* Rest of the web-applets: Same as above except '''ApplicationInfo'''  isn't set.


= Service Access Control =
= Service Access Control =

Revision as of 14:58, 18 July 2017

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 <Varies> ACID
<See META> <See META> ACI0

META

Offset Size Description
0x0 0x4 Magic "META".
0xE 1
0xF 1
0x1C 4
0x20 ? Title name
0x70 0x4 #ACI0 offset
0x74 0x4 #ACI0 size
0x78 0x4 #ACID offset
0x7C 0x4 #ACID size

ACID

Offset Size Description
0 0x100 RSA-2048 signature
0x100 0x100 RSA-2048 public key
0x200 0x4 Magic "ACID".
0x204 0x8 Zeroes
0x20C 0x4 Retail flag. Must be 1 on retail, on devunit 0 is also allowed.
0x210 0x8 Title id
0x218 0x8 Title id again
0x220 0x4 #FS Access Control offset
0x224 0x4 #FS Access Control size
0x228 0x4 #Service Access Control offset
0x22C 0x4 #Service Access Control size
0x230 4 #Kernel Access Control offset
0x234 4 #Kernel Access Control size
0x238 0x8 Padding

ACI0

Looks like an old crappy version of ACID. It has the guessed version field 0 instead of 1.

FS Access Control

Offset Size Description
0x0 0x4 Version (usually 1).
0x4 0x8 FS Access Rights
0xC 0x4 ContentOwnerIds start offset
0x10 0x4 ContentOwnerIds end offset
0x14 0x4 SaveDataOwnerIds start offset
0x18 0x4 SavaDataOwnerIds end offset

FS Access Rights

Bit and bitmask Description
0, 0x1 ApplicationInfo (MountContent* is accessible when set)
1, 0x2 BootModeControl
2, 0x4 Calibration (Enables access to Bis partitionID 27 and 28)
3, 0x8 SystemSaveData
4, 0x10 GameCard
5, 0x20 SaveDataBackup
6, 0x40 SaveDataManagement
7, 0x80 BisAllRaw
8, 0x100 GameCardRaw
9, 0x200 GameCardPrivate
10, 0x400 SetTime
11, 0x800 ContentManager
12, 0x1000 ImageManager
13, 0x2000 CreateSaveData
14, 0x4000 SystemSaveDataManagement
15, 0x8000 BisFileSystem
16, 0x10000 SystemUpdate
17, 0x20000 SaveDataMeta
18, 0x40000 DeviceSaveControl
19, 0x80000 SettingsControl
62, 0x4000000000000000 Debug
63, 0x8000000000000000 FullPermission

Web-applets access control:

  • "LibAppletWeb" and "LibAppletOff" have same access control: word0 bit0 set, ApplicationInfo and SystemSaveData set, and Debug set.
  • Rest of the web-applets: Same as above except ApplicationInfo isn't set.

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.

Kernel Access Control

On Switch, descriptors are identified by pattern 01..11 in low bits.

Pattern of lower bits Type Fields
0bxxxxxxxxxxxx0111 Kernel flags Bit31-24: Highest allowed cpu id, bit23-16: Lowest allowed cpu id, bit15-10: Highest allowed thread prio, bit9-4: Lowest allowed thread prio
0bxxxxxxxxxxx01111 Syscall mask Bits 29-31: Syscall mask table index; Bits 5-28: Mask
0bxxxxxxxxx0111111 Map IO page (RW) Bits 7-31: Page
0bxxxxxxxx01111111 Map IO range Bits 7-30: Alternating start page and number of pages, bit31: Alternating read-only flag then MemoryAttribute 0x2001/0x42002 selector flag
0bxxxx011111111111 Interrupt pair Bits 12-21: Irq0, bits 20-31: Irq1, 0x3FF means empty.
0xxxx0111111111111
0xxx01111111111111
0xx011111111111111
0x0111111111111111
All ones Ignored
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