This page describes the structure of the .ctx files located at
nand:/title/
Structure #
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x10 | AESMAC over SHA256 of bytes 0x10..0x30 |
| 0x10 | 0x4 | Magic “CTXT” |
| 0x14 | 0x4 | Value 0 usually? |
| 0x18 | 0x4 | Value 1 usually? |
| 0x1C | 0x4 | Value 0 usually? |
| 0x20 | 0x8 | TitleID |
| 0x28 | 0x4 | Unknown u32 |
| 0x2C | 0x1D4 | All-zero |
| 0x200 | 0x10 | AES-MAC? |
| 0x210 | 0x8 | TitleID |
| 0x218 | 0x4 | contentID for contentindex0 |
| 0x21C | 0x4 | Unknown u32 for contentindex0 |
| 0x220 | 0x8 | content-size for contentindex0 |
| 0x228 | 0x8 | Usually zero? |
| 0x230 | 0x3CC | Usually 0xFF? |
| 0x5FC | 0x4 | This has the same value as the u32 at 0x28. |