Difference between revisions of "News Channel"

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m (Title ID and fixed description typo)
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| desc        = News information
 
| desc        = News information
 
| id          = HAGA, HAGx
 
| id          = HAGA, HAGx
 +
| source      = update
 
| type        = General channel
 
| type        = General channel
 
| version    = 0.7 (7)
 
| version    = 0.7 (7)
Line 10: Line 11:
 
}}
 
}}
  
The '''News Channel''' download data packages from Nintendo servers via plain HTTP connection.  Since the official servers for this were discontinued on June 28, 2013, [[RiiConnect24]] is in the works.
+
The '''News Channel''' downloads data packages from Nintendo servers via plain HTTP connection.  The official servers for the News Channel were discontinued on June 28, 2013; however, [[RiiConnect24]] has since restored its functionality.
  
Some examples:
+
The data files are RSA-2048-SHA1 signed, and the LZ10 compressed content begins at 0x140. A Kaitai file documenting the file structure can be found [https://github.com/RiiConnect24/Kaitai-Files/blob/master/Kaitais/news_file.ksy here], and code used by RiiConnect24 to download news data and generate files is available [https://github.com/RiiConnect24/File-Maker/tree/master/Channels/News_Channel here].
 
 
http://news.wapp.wii.com/1/076/news.bin.08<br />
 
 
 
Nowadays, it seems the news file has moved:
 
 
 
http://news.wapp.wii.com/v2/1/076/news.bin.00
 
 
 
...
 
 
 
http://news.wapp.wii.com/v2/1/076/news.bin.23
 
 
 
http://news.wapp.wii.com/ displays a Red Hat Enterprise Linux Test Page.
 
File structure:
 
 
 
<pre>
 
$0000 - $003F: padding (00)
 
$0040 - $013F: rsa encrypted sha-1 signature of rest of the file
 
$0140 - $0143: header
 
$0144 - .....: compressed data
 
</pre>
 
 
 
The compression is very simple:
 
# Read one byte
 
# For each bit of the byte, msb-to-lsb,
 
#* if 0, copy one byte to the output
 
#* if 1, read 16 bits msb first in v, copy n bytes at offset m from the end of the output, n=3+(v>>12), m=v & fff
 
 
 
Quick and very dirty C code:
 
<source lang="c">
 
  i = 0x144;
 
  j = 0;
 
  while(i < size) {
 
    int k;
 
    int v = data[i++];
 
    for(k=0; k<8; k++)
 
      if(!(v & (1 << (7-k)))) {
 
        result_data[j++] = data[i++];
 
      } else {
 
        int vv = (data[i] << 8) | data[i+1];
 
        int nb = 3+(vv >> 12);
 
        int off = (vv & 0xfff);
 
        int l;
 
        i+=2;
 
        for(l=0; l<nb; l++) {
 
          result_data[j] = result_data[j-off-1];
 
          j++;
 
        }
 
      }
 
  }
 
</source>
 
 
 
[[Category:Software]]
 

Latest revision as of 00:54, 3 June 2021

News Channel
Newschannel.png
Version0.7 (7)
Title IDHAGA, HAGx
TypeGeneral channel
Installed fromSystem Update
PeripheralsWiimote1.svg Internet

The News Channel downloads data packages from Nintendo servers via plain HTTP connection. The official servers for the News Channel were discontinued on June 28, 2013; however, RiiConnect24 has since restored its functionality.

The data files are RSA-2048-SHA1 signed, and the LZ10 compressed content begins at 0x140. A Kaitai file documenting the file structure can be found here, and code used by RiiConnect24 to download news data and generate files is available here.