Common Data Security Architecture (CDSA) White Paper

126 AppendixG
ZIP format
4 4 bytes CRC-32
8 4 bytes Compressed size
12 4 bytes Uncompressed size
Central directory:
Offset Length Contents
0 4 bytes Central file header signature (0x02014b50)
4 2 bytes Version made by
6 2 bytes Version needed to extract
8 2 bytes General purpose bit flag
10 2 bytes Compression method
12 2 bytes Last mod file time
14 2 bytes Last mod file date
16 4 bytes CRC-32
20 4 bytes Compressed size
24 4 bytes Uncompressed size
28 2 bytes Filename length (f)
30 2 bytes Extra field length (e)
32 2 bytes File comment length (c)
34 2 bytes Disk number start
36 2 bytes Internal file attributes
38 4 bytes External file attributes
42 4 bytes Relative offset of local header
46 (f)bytes Filename
(e)bytes Extra field
(c)bytes File comment
End of central directory record:
Offset Length Contents
0 4 bytes End of central dir signature (0x06054b50)
4 2 bytes Number of this disk
6 2 bytes Number of the disk with the start of the central directory