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→Content Container
The first 0x10-bytes are all-zero except the first byte which is usually 0x80. It's unknown what the first 0x10-bytes are used for.
The first 0x10-bytes are all-zero except the first byte which is usually 0x80. It's unknown what the first 0x10-bytes are used for.
The hash at offset 0x12 hashes the 0x12-byte data at offset 0x0 followed by a zero u16. The RSA signature is signed by Nintendo. Following this header is the actual content payload, which is written to a cleartext file under the [[extdata]] /boss directory. The data following the payload header is written to extdata, but it's unknown what data is written to the extdata file before the content payload.
The hash at offset 0x12 hashes the 0x12-byte data at offset 0x0 followed by a zero u16. The RSA signature is signed by Nintendo. Following this header is the actual content payload, which is written to a cleartext file under the [[extdata]] /boss directory.
=== Payload Content Header ===
=== Payload Content Header ===
| 0x18
| 0x18
| 0x4
| 0x4
| ?
| Probably some version field for the payload
|-
|-
| 0x1C
| 0x1C
The hash at offset 0x1C hashes the 0x1C-byte data at offset 0x0 followed by a zero u16, followed by all of the remaining cleartext data following this header(the actual content data).
The hash at offset 0x1C hashes the 0x1C-byte data at offset 0x0 followed by a zero u16, followed by all of the remaining cleartext data following this header(the actual content data).
The downloaded boss data is written in the following format to extdata.
First an extdata header in the following format
{| class="wikitable"
|-
! Offset
! Length
! Description
|-
| 0x0
| 0x1
| Size of header including this field. Always 0x18
|-
| 0x1
| 0xB
| Usually zero?
|-
| 0xC
| 0x4
| Unknown
|-
| 0x10
| 0x4
| Download date in format: Bit 0-6 = day, Bit 7-10 = month, Bit 11-21 = year
|-
| 0x14
| 0x4
| Usually zero? Padding?
|}
Followed by the Payload Content Header without the hash and signature (first 0x1C bytes) and the actual payload.
[[Category:Nintendo Software]]
[[Category:Nintendo Software]]