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# ==============================================================
# crypt.py written 2008 by blackpenguin <nlissne@linux01.org>
# ==============================================================
# License : GPL3
# Description : encrypt/decrypt PRIVMSGs in WeeChat using
# a pre-shared key and openssl
#
# *this version is for the upcoming weechat-0.3.0 only*
#
version="1.3"
#
# This plugin uses openssl to encrypt/decrypt messages you send
# or receive with weechat. Due to the very simple method
# used it should be easy to port this plugin to any other
# IRC client.
#
# The default encryption algorithm is blowfish, but you can
# easily change it to any other cipher your openssl offers.
# Read output of "openssl -h" to find out which ciphers are
# supported (also depends on your kernel!)
CIPHER="blowfish"
#
# To activate encryption for a given user just
# put a file called "cryptkey.username" into
# your weechat-directory, containing the passphrase
# to use for encryption/decryption
#
# You can activate encryption on irc-channels, too,
# just use cryptkey.#channelname as keyfile then.
#
# example: if you have exchanged a secret key with me,
# you would put it in a file called
# cryptkey.blackpenguin in your weechat_dir
#
# Of course, you need to share this keyfile with the
# remote side in another secure way (i.e. sending
# pgp-encrypted mail)
import weechat, string, os, subprocess
def decrypt(data, msgtype, servername, args):
hostmask, chanmsg = string.split(args, "PRIVMSG ", 1)
channelname, message = string.split(chanmsg, " :", 1)
if channelname[0] == "#":
username=channelname
else:
username, rest = string.split(hostmask, "!", 1)
username = username[1:]
if os.path.exists(weechat_dir + "/cryptkey." + username):
p = subprocess.Popen(["openssl", "enc", "-d", "-a", "-" + CIPHER, "-pass" ,"file:" + weechat_dir + "/cryptkey." + username], bufsize=4096, stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True)
p.stdin.write("U2FsdGVkX1" + message.replace("|","\n"))
p.stdin.close()
decrypted = p.stdout.read()
p.stdout.close()
if decrypted == "":
return args
return hostmask + "PRIVMSG " + channelname + " :" + chr(3) + "04* crypted * " + chr(15) + decrypted
else:
return args
def encrypt(data, msgtype, servername, args):
pre, message = string.split(args, ":", 1)
prestr=pre.split(" ")
username=prestr[-2]
if os.path.exists(weechat_dir + "/cryptkey." + username):
p = subprocess.Popen(["openssl", "enc", "-a", "-" + CIPHER, "-pass" ,"file:" + weechat_dir + "/cryptkey." + username], bufsize=4096, stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True)
p.stdin.write(message)
p.stdin.close()
encrypted = p.stdout.read()
p.stdout.close()
encrypted = encrypted.replace("\n","|")
if len(encrypted) > 400:
splitmsg=string.split(message," ")
cutpoint=len(splitmsg)/2
p = subprocess.Popen(["openssl", "enc", "-a", "-" + CIPHER, "-pass" ,"file:" + weechat_dir + "/cryptkey." + username], bufsize=4096, stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True)
p.stdin.write(string.join(splitmsg[:cutpoint]," ") + "\n")
p.stdin.close()
encrypted = p.stdout.read()
p.stdout.close()
encrypted = encrypted.replace("\n","|")
p = subprocess.Popen(["openssl", "enc", "-a", "-" + CIPHER, "-pass" ,"file:" + weechat_dir + "/cryptkey." + username], bufsize=4096, stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True)
p.stdin.write( string.join(splitmsg[cutpoint:]," ") )
p.stdin.close()
encrypted2 = p.stdout.read()
p.stdout.close()
encrypted2 = encrypted2.replace("\n","|")
encrypted = encrypted + "\n" + pre + ":" + encrypted2[10:]
return pre + ":" + encrypted[10:]
else:
return args
# for subprocess.Popen call
PIPE=-1
# register plugin
weechat.register("crypt", "Nicolai Lissner", version, "GPL3", "encrypt/decrypt PRIVMSGs", "", "UTF-8")
weechat_dir = weechat.info_get("weechat_dir","")
# register the modifiers
weechat.hook_modifier("irc_in_privmsg", "decrypt", "")
weechat.hook_modifier("irc_out_privmsg", "encrypt", "")
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