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Line 100: − 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.+ − − === Extdata Header === − {| class="wikitable" − |- − ! Offset − ! Length − ! − |- − | 0x0 − | 0x8 − | ProgramID − |- − | 0x8 − | 0x4 − | Usually zero? − |- − | 0xC − | 0x4 − | Magic Number 0x10001 − |- − | 0x10 − | 0x4 − | Filesize related? − |- − | 0x14 − | 0x4 − | ? − |- − | 0x18 − | 0x4 − | ? − |} − +
no edit summary
| 0x0
| 0x0
| 0x10
| 0x10
| All-zero except the first byte which is 0x80?
| ?
|-
|-
| 0x10
| 0x10
| 0x2
| 0x2
| Usually 0x2
| ?
|-
|-
| 0x12
| 0x12
|}
|}
When the content payload has an additional RSA signature checked by the application, the first 0x10-bytes are all-zero except the first byte which is 0x80. And the u16 at 0x10 is 0x2 when an additional signature is used. When an additional signature isn't used, the first 0x12-bytes are used to verify the content payload.
Following this header is the actual content payload. The data starting at the beginning of this header 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.
[[Category:Nintendo Software]]
[[Category:Nintendo Software]]