I have this problem: i use a satellite receiver based on linux, (Dreambox dm800),  since this box is on 24/7 i installed irssi in it (i found a version already compiled for mips processors, the cpu inside the Dreambox), the problem is that im unable to install blowssi on it (i guess it could be possible to cross-compile it, but it goes behind my present linux skills, very limited tbh), so i cant decode the messages from my beloved chan where we use fish encryption (all works fine if i use mirc + fish script in windows).

The good thing is that Irssi saves the logs with the crypted messages, so, having the key, i suppose it's possible to decode such messages in some way.

Do you know any software that can do such thing? I tried few online tools but it didnt work out, example this: http://www.tools4noobs.com/online_tools/decrypt/ .

BTW... In this chan we use a 98bytes key, and i seen some of this online tools are limited to 56bytes keys.

Also, do you think is possible to crosscompile this  "blowssi - mircryption compat for irssi " https://www.donationcoder.com/forum/index.php?topic=26221.0

and have it to work in a Dreambox? (linux box based on mips processor).