Difference between revisions of "FSPXI:ReadFileSHA256"
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TimmSkiller (talk | contribs) (Unknown value -> Alignment size) |
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| 1 | | 1 | ||
| − | | File | + | | File handle lower word |
|- | |- | ||
| 2 | | 2 | ||
| Line 21: | Line 21: | ||
|- | |- | ||
| 5 | | 5 | ||
| − | | Size of | + | | Size of read buffer |
|- | |- | ||
| 6 | | 6 | ||
| − | | | + | | Alignment size (always 0x00001000) |
|- | |- | ||
| 7 | | 7 | ||
| − | | Size of | + | | Size of hashtable |
|- | |- | ||
| 8 | | 8 | ||
| − | | (size of | + | | (size of hashtable << 8) <nowiki>|</nowiki> 6 |
|- | |- | ||
| 9 | | 9 | ||
| − | | Pointer to | + | | Pointer to hashtable |
|- | |- | ||
| 10 | | 10 | ||
| − | | (size of | + | | (size of read buffer << 8) <nowiki>|</nowiki> 0x14 |
|- | |- | ||
| 11 | | 11 | ||
| − | | Pointer to | + | | Pointer to read buffer |
|} | |} | ||
| Line 61: | Line 61: | ||
|} | |} | ||
| − | The data read are stored in the | + | The data read are stored in the read buffer. For each 0x1000-byte block read, a SHA256 hash of the block is stored in the hashtable. |
| + | |||
| + | It is unknown how hashing behaves if the read offset/size are not aligned to a 0x1000-byte boundary. | ||
Latest revision as of 20:59, 5 June 2022
Request[edit]
| Index Word | Description |
|---|---|
| 0 | Header code [0x004D01C4] |
| 1 | File handle lower word |
| 2 | File handle upper word |
| 3 | Offset lower word |
| 4 | Offset upper word |
| 5 | Size of read buffer |
| 6 | Alignment size (always 0x00001000) |
| 7 | Size of hashtable |
| 8 | (size of hashtable << 8) | 6 |
| 9 | Pointer to hashtable |
| 10 | (size of read buffer << 8) | 0x14 |
| 11 | Pointer to read buffer |
Response[edit]
| Index Word | Description |
|---|---|
| 0 | Header code |
| 1 | Result code |
| 2 | Size read |
| 3 | 4 |
The data read are stored in the read buffer. For each 0x1000-byte block read, a SHA256 hash of the block is stored in the hashtable.
It is unknown how hashing behaves if the read offset/size are not aligned to a 0x1000-byte boundary.