Wii Channels

From WiiLi

[edit] Data Packages

[edit] News / Forecast

Downloads are data packages from Nintendo servers via plain http connection.

Some examples:

File structure:

$0000 - $003F: padding (00)
$0040 - $013F: rsa encrypted sha-1 signature of rest of the file
$0140 - $....: compressed data

Data compression method is still unknown. If you calculate entropy of the data, you will notice that it is definitely not encrypted. Probably it uses a modified version of propieritary Nintendo compression method described here: http://everything2.com/index.pl?node_id=1469892&lastnode_id=0

Here's a part of a news data file. You can almost see string "Regional News" there:

000003D8   24 0F F0 00  7F 23 D7 00  87 24 2F 14  00 52 00 00  65 00 67 00  69 00 6F 00  $....#...$/..R..e.g.i.o.
000003F0   00 6E 00 61  00 6C 00 20  00 45 4E 00  11 77 00 73  05 4A 49 00  13 56 74 00  .n.a.l. .EN..w.s.JI..Vt.