3.3 KiB
3.3 KiB
Stuffit 5 format
All intergers are big-endians.
Archive header
| Offset | Length | Contents |
|---|---|---|
| 000 | 80 bytes | Magic string (always StuffIt (c)1997-???? Aladdin Systems, Inc., http://www.aladdinsys.com/StuffIt/ followed by 0x0D 0x0A, where characters marked ? can vary) |
| 080 | Half | Unknown |
| 082 | Byte | Version (always 5) |
| 083 | Byte | Flags (0x80 = encrypted) |
| 084 | Word | Total size of archive |
| 088 | Word | Unknown |
| 092 | Half | Number of entries in root directory |
| 094 | Word | Offset of first entry in root directory |
| 098 | Half | Header CRC-16? |
| 100 | ? | Unknown data until first entry |
Entry header
Base header for file and folder
Both file and folder headers start with the following header.
| Offset | Length | Contents |
|---|---|---|
| 00 | Word | Magic number (always 0xA5A5A5A5) |
| 04 | Byte | Version |
| 05 | Byte | Unknown (but certainly 0x00) |
| 06 | Half | Header size |
| 08 | Byte | Unknown |
| 09 | Byte | Entry flags/type |
| 10 | Word | Creation date (Mac OS format) |
| 14 | Word | Modification date (Mac OS format) |
| 18 | Word | Offset of previous entry |
| 22 | Word | Offset of next entry |
| 26 | Word | Offset of directory entry |
| 30 | Half | Name size (called N after) |
| 32 | Half | Header CRC-16 |
File specific header
A file (when flags doesn't contain 0x40) continues with the following header.
| Offset | Length | Contents |
|---|---|---|
| 34 | Word | Data fork uncompressed length |
| 38 | Word | Data fork compressed length |
| 42 | Half | Data fork CRC-16 (Set to zero for method 15) |
| 44 | Half | Unknown |
| 46 | Byte | Data fork compression method (only 0, 13 or 15) |
| 47 | Byte | Password data lenght (called M after) |
| 48 | M | Password information |
| 48+M | N | Filename |
| 48+M+N | K | Comment size (called K after) |
| 48 | N | Filename |
| 48 | N | Filename |
Folder specific header
A folder (when flags contains 0x40) continues with the following header.
| Offset | Length | Contents |
|---|---|---|
| 34 | Word | Offset of first entry in folder |
| 38 | Word | Size of complete directory |
| 42 | Word | Unknown |
| 46 | Half | Number of files in folder |
| 48 | N | Folder name |
| 48+N | ? | Unknown data until next entry |
Note: if the offset of first entry is 0xFFFFFFFF, this folder must be skiped
after reading 48 bytes of header (the usefulness of these folders is unclear).
Sources
https://github.com/mietek/theunarchiver/wiki/StuffIt5Format https://github.com/mietek/theunarchiver/blob/master/XADMaster/XADStuffIt5Parser.m#L29