Pretendo++

Super dumb account server returning static data, just enough to satisfy Cemu.

Related repositories:

• https://github.com/mrexodia/SMMNEX
• https://github.com/mrexodia/NintendoClients/tree/friends-server
• https://github.com/Stary2001/nex-dissector

Pretendo++

Here is an example Pretendo++.ini:

[OAuth20]
access_token=1234567890abcdef1234567890abcdef
refresh_token=fedcba0987654321fedcba0987654321fedcba12
expires_in=3600

; Friends
[00003200]
host=127.0.0.1
port=60000
pid=1337
password=password
token=RlJJRU5EU0ZSSUVORFNGUklFTkRTRlJJRU5EU0ZSSUVORFNGUklFTkRTRlJJRU5EU0ZSSUVORFNGUklFTkRTRlJJRU5EU0ZSSUVORFNGUklFTkRTRlJJRU5EU0ZSSUVORFNGUklFTkRTRlJJRU5EU0ZSSUVORFNGUklFTkRTRlI=

; SMM
[1018DB00]
host=127.0.0.1
port=59900
pid=1337
password=password
token=U01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU01NU00=

Fiddler

Rules -> Customize Rules... at the end of the OnBeforeRequest method add the following:

if (oSession.HostnameIs("account.nintendo.net"))
{
    if (oSession.HTTPMethodIs("CONNECT"))
    {
        // This is just a fake tunnel for CONNECT requests
        oSession["x-replywithtunnel"] = "PretendoTunnel";
        return;
    }
    oSession.fullUrl = "http://127.0.0.1:8383" + oSession.PathAndQuery;
}
else if(oSession.HostnameIs("wup-ama.app.nintendo.net"))
{
    if (oSession.HTTPMethodIs("CONNECT"))
    {
        // This is just a fake tunnel for CONNECT requests
        oSession["x-replywithtunnel"] = "PretendoTunnel";
        return;
    }
    oSession.fullUrl = "http://127.0.0.1:8383" + oSession.PathAndQuery;
}

Next up, export the Fiddler root certificate:

• In Fiddler, open Tools > Options
• In the HTTPS tab turn on HTTPS Connects
• Enable HTTPS decrypting
• Ignore server certificate errors
• In the Connections tab tick Allow remote computers to connect
• Turn off Act as system proxy on startup
• Back in the HTTPS tab click Actions > Export Root Certificate to Desktop, which will give you FiddlerRoot.cer

As long as you don't force Cemu/WiiU to connect to Fiddler as a proxy you will not interfere with online services.

Cemu

You can use the CemuMagic module on Cemu 1.15.8 from this repository: https://github.com/mrexodia/AppInitHook/tree/cemu

Inject CemuMagic.dll into Cemu.exe before startup (either by using the AppInitHook framework, or by other methods).

You need to copy your FiddlerRoot.cer into Cemu\BIN\mlc01\sys\title\0005001b\10054000\content\scerts\ with the following names:

CACERT_NINTENDO_CA.der.proxy
CACERT_NINTENDO_CA_G2.der.proxy
CACERT_NINTENDO_CA_G3.der.proxy
CACERT_NINTENDO_CLASS2_CA.der.proxy
CACERT_NINTENDO_CLASS2_CA_G2.der.proxy
CACERT_NINTENDO_CLASS2_CA_G3.der.proxy

You also have to set Cemu up to work online. This method will not interfere with online services if you are not injecting CemuMagic.dll.

You can use DebugView to see the logs for CemuMagic.