SpotPass: Difference between revisions
Meleemeister (talk | contribs) →BOSS Header: changed CTR to IV |
Meleemeister (talk | contribs) |
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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 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 === | ||
| Line 144: | Line 144: | ||
| 0x18 | | 0x18 | ||
| 0x4 | | 0x4 | ||
| | | Probably some version field for the payload | ||
|- | |- | ||
| 0x1C | | 0x1C | ||
| Line 158: | Line 158: | ||
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]] | ||