Difference between revisions of "Nintendo DS Cart Whitelist"

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(→‎Header Structure: 0x04 is an RSA signature)
(→‎NDHT entry: hash1 is definitely something with the main binary)
 
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The '''Nintendo DS Cart Whitelist''' is a system title (HNHA / 0003000f484e4841) on DSi and 3DS TWL_MODE that contains a list of whitelisted DS carts. Other carts can be loaded if they have a valid RSA signature, which is how newer DS games load on DSi systems.
 
The '''Nintendo DS Cart Whitelist''' is a system title (HNHA / 0003000f484e4841) on DSi and 3DS TWL_MODE that contains a list of whitelisted DS carts. Other carts can be loaded if they have a valid RSA signature, which is how newer DS games load on DSi systems.
  
−
== Basic File Structure ==
+
== Format ==
−
The file consists in one header, a list of titles and a footer. Note: this page only covers the initial versions of the whitelist. Later versions also have NDHX and NDHI sections and have footer differences.
+
Newer versions of the file contain 3 sections: NDHT, NDHX, and NDHI. Older versions only contain NDHT.
  
−
=== Header Structure ===
+
=== Header ===
−
The header is 136 bytes.
+
Each section starts with a 136 byte header.
 
{| class="wikitable"
 
{| class="wikitable"
 
|- style="background-color: #ddd;"
 
|- style="background-color: #ddd;"
Line 14: Line 14:
 
| 0x00
 
| 0x00
 
| 4
 
| 4
−
| An ID (NDHT)
+
| Section type (NDHT, NDHX, NDHI)
 
|-
 
|-
 
| 0x04
 
| 0x04
 
| 0x80
 
| 0x80
−
| RSA signature of the entire NDHT section below this point.
+
| RSA signature of the entire section below this point.
 
|-
 
|-
 
| 0x84
 
| 0x84
 
| 4
 
| 4
−
| Number of titles in NDHT section
+
| Number of entries
 
|}
 
|}
  
−
=== Title Structure ===
+
=== NDHT entry ===
−
A title is 48 bytes.
+
NDHT entries correspond to titles and are 48 bytes. The NDHT section is always first.
 +
 
 
{| class="wikitable"
 
{| class="wikitable"
 
|- style="background-color: #ddd;"
 
|- style="background-color: #ddd;"
Line 43: Line 44:
 
| 0x08
 
| 0x08
 
| 20
 
| 20
−
| The first SHA-1 sum
+
| hash1 (HMAC covering parts of the main binary)
 
|-
 
|-
 
| 0x1C
 
| 0x1C
 
| 20
 
| 20
−
| The second SHA-1 sum
+
| hash2 (overlay?)
 
|}
 
|}
  
−
=== Footer Structure ===
+
=== NDHT footer ===
−
The footer is 24 bytes.
+
The NDHT footer is 24 bytes.
 
{| class="wikitable"
 
{| class="wikitable"
 
|- style="background-color: #ddd;"
 
|- style="background-color: #ddd;"
Line 61: Line 62:
 
| 24
 
| 24
 
| Unknown
 
| Unknown
 +
|}
 +
 +
=== NDHX entry ===
 +
{| class="wikitable"
 +
|- style="background-color: #ddd;"
 +
! Start
 +
! Length
 +
! Description
 +
|-
 +
| 0x00
 +
| 4
 +
| ROM serial
 +
|-
 +
| 0x04
 +
| 4
 +
| ROM revision
 +
|-
 +
| 0x08
 +
| 20
 +
| hash3
 +
|}
 +
 +
=== NDHI entry ===
 +
{| class="wikitable"
 +
|- style="background-color: #ddd;"
 +
! Start
 +
! Length
 +
! Description
 +
|-
 +
| 0x00
 +
| 4
 +
| ROM serial
 +
|-
 +
| 0x04
 +
| 4
 +
| ROM revision
 +
|-
 +
| 0x08
 +
| 64
 +
| 8 HMAC region struct
 +
 +
{| class="wikitable"
 +
! Start
 +
! Length
 +
! Description
 +
|-
 +
| 0x0
 +
| 4
 +
| Unknown (offset?)
 +
|-
 +
| 0x4
 +
| 4
 +
| Unknown (length?)
 +
|}
 +
 +
|-
 +
| 0x48
 +
| 20
 +
| Expected HMAC
 
|}
 
|}

Latest revision as of 03:02, 26 September 2022

The Nintendo DS Cart Whitelist is a system title (HNHA / 0003000f484e4841) on DSi and 3DS TWL_MODE that contains a list of whitelisted DS carts. Other carts can be loaded if they have a valid RSA signature, which is how newer DS games load on DSi systems.

Format

Newer versions of the file contain 3 sections: NDHT, NDHX, and NDHI. Older versions only contain NDHT.

Header

Each section starts with a 136 byte header.

Start Length Description
0x00 4 Section type (NDHT, NDHX, NDHI)
0x04 0x80 RSA signature of the entire section below this point.
0x84 4 Number of entries

NDHT entry

NDHT entries correspond to titles and are 48 bytes. The NDHT section is always first.

Start Length Description
0x00 4 ROM serial
0x04 4 ROM revision
0x08 20 hash1 (HMAC covering parts of the main binary)
0x1C 20 hash2 (overlay?)

NDHT footer

The NDHT footer is 24 bytes.

Start Length Description
0x00 24 Unknown

NDHX entry

Start Length Description
0x00 4 ROM serial
0x04 4 ROM revision
0x08 20 hash3

NDHI entry

Start Length Description
0x00 4 ROM serial
0x04 4 ROM revision
0x08 64 8 HMAC region struct
Start Length Description
0x0 4 Unknown (offset?)
0x4 4 Unknown (length?)
0x48 20 Expected HMAC
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