Supports both cbc and ecb encryption modes. (to use cbc encryption just prefix the key with cbc: )
Blowssi is Free (both as in freedom and as in beer) software (licensed under the GNU GPL v3)
Blowssi will work on any platform perl and irssi work on.
dh1080 key exchange (since 0.2.0)
Crypt::ircBlowfish (see bundeled zip file, but also available from donationcoder.com)
Crypt::ircDH1080 (see bundled tar.gz file - if you have problems with Math::Pari or Crypt::Random, see alternative module in the download page.)
Crypt::CBC (on gentoo you can just: emerge dev-perl/crypt-cbc)
MIME:Base64 (on gentoo you can just: emerge perl-MIME-Base64 (which is a virtual package)
or emerge perl-core/MIME-Base64 though you probably already have it.)
First make sure all requirements are installed (see above).
To install, just put the script in ~/.irssi/scripts and put this in your
/blowon : Turns encryption back on after you used /blowoff (it's on by default)
note that blowssi will not attempt to encrypt/decrypt in channels without key anyway.
This is just for convenience in case you don't want to use the backtick (`) method. (see notes)
/blowoff : Causes encryption and decryption to be skipped for all channels, even with key.
/blowkey channel key : sets a key for a channel or nickname (for pm queries)
eg: /blowkey #mircryption test
/blowkey Gothi[c] foo
Note that you must use the # character for channels.
/blowdel channel : Removes a key for a channel or nickname (query), effectively disabeling encryption.
/blowkeyx cbc|ecb user : Starts a key exchange with specified user, using specified mode (ecb or cbc).
If you start a line with a backtick (`), encryption will be bypassed.
Prefix a key with cbc: to use CBC mode instead of ECB.
Use # for channels, or nicknames to set keys for query windows.
Configuration file is stored in ~/.irssi/blowssi.conf