News Channel
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News / Weather channel downloads data packages from Nintendo servers via plain http connection.
Some examples:
http://weather.wapp.wii.com/1/076/short.bin http://weather.wapp.wii.com/1/076/forecast.bin http://news.wapp.wii.com/1/076/news.bin.08
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.