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import base64, os
import scrypt
REQUIRES_IDENTIFY = ("You need to be identified to use that command "
"(/msg %s register | /msg %s identify)")
class Module(object):
def __init__(self, bot, events):
self.bot = bot
events.on("new").on("user").hook(self.new_user)
events.on("preprocess").on("command").hook(
self.preprocess_command)
events.on("received").on("part").hook(self.on_part)
events.on("received").on("command").on("identify"
).hook(self.identify, private_only=True, min_args=1,
usage="<password>", help="Identify yourself")
events.on("received").on("command").on("register"
).hook(self.register, private_only=True, min_args=1,
usage="<password>", help="Register your nickname")
events.on("received.command.logout").hook(self.logout,
private_only=True, help="Sign out from the bot")
events.on("received.command.mypermissions").hook(
self.my_permissions, authenticated=True)
events.on("received.command.givepermission").hook(
self.give_permission, min_args=2, permission="givepermission")
events.on("received.command.removepermission").hook(
self.remove_permission, min_args=2, permission="removepermission")
def new_user(self, event):
self._logout(event["user"])
def on_part(self, event):
if len(event["user"].channels) == 1 and event["user"].identified:
event["user"].send_notice("You no longer share any channels "
"with me so you have been signed out")
def _get_hash(self, user):
hash, salt = user.get_setting("authentication", (None, None))
return hash, salt
def _make_salt(self):
return base64.b64encode(os.urandom(64)).decode("utf8")
def _make_hash(self, password, salt=None):
salt = salt or self._make_salt()
hash = base64.b64encode(scrypt.hash(password, salt)).decode("utf8")
return hash, salt
def _identified(self, user):
user.identified = True
def _logout(self, user):
user.identified = False
def identify(self, event):
if not event["user"].channels:
event["stderr"].write("You must share at least one channel "
"with me before you can identify")
return
if not event["user"].identified:
password = event["args_split"][0]
hash, salt = self._get_hash(event["user"])
if hash and salt:
attempt, _ = self._make_hash(password, salt)
if attempt == hash:
self._identified(event["user"])
event["stdout"].write("Correct password, you have "
"been identified.")
else:
event["stderr"].write("Incorrect password")
else:
event["stderr"].write("This nickname is not registered")
else:
event["stderr"].write("You are already identified")
def register(self, event):
hash, salt = self._get_hash(event["user"])
if not hash and not salt:
password = event["args_split"][0]
hash, salt = self._make_hash(password)
event["user"].set_setting("authentication", [hash, salt])
self._identified(event["user"])
event["stdout"].write("Nickname registered successfully")
else:
event["stderr"].write("This nickname is already registered")
def logout(self, event):
if event["user"].identified:
self._logout(event["user"])
event["stdout"].write("You have been logged out")
else:
event["stderr"].write("You are not logged in")
def preprocess_command(self, event):
authentication = event["user"].get_setting("authentication", None)
permission = event["hook"].kwargs.get("permission", None)
authenticated = event["hook"].kwargs.get("authenticated", False)
protect_registered = event["hook"].kwargs.get("protect_registered",
False)
if permission:
identified = event["user"].identified
user_permissions = event["user"].get_setting("permissions", [])
has_permission = permission and (
permission in user_permissions or "*" in user_permissions)
if not identified or not has_permission:
return "You do not have permission to do that"
elif authenticated:
if not event["user"].identified:
return REQUIRES_IDENTIFY % (event["server"].nickname,
event["server"].nickname)
elif protect_registered:
if authentication and not event["user"].identified:
return REQUIRES_IDENTIFY % (event["server"].nickname,
event["server"].nickname)
def my_permissions(self, event):
permissions = event["user"].get_setting("permissions", [])
event["stdout"].write("Your permissions: %s" % ", ".join(permissions))
def _get_user_details(self, server, nickname):
target = server.get_user(nickname)
registered = bool(target.get_setting("authentication", None))
permissions = target.get_setting("permissions", [])
return [target, registered, permissions]
def give_permission(self, event):
permission = event["args_split"][1].lower()
target, registered, permissions = self._get_user_details(
event["server"], event["args_split"][0])
if not registered:
event["stderr"].write("%s isn't registered" % target.nickname)
return
if permission in permissions:
event["stderr"].write("%s already has permission '%s'" % (
target.nickname, permission))
else:
permissions.append(permission)
target.set_setting("permissions", permissions)
event["stdout"].write("Gave permission '%s' to %s" % (
permission, target.nickname))
def remove_permission(self, event):
permission = event["args_split"][1].lower()
target, registered, permissions = self._get_user_details(
event["server"], event["args_split"][0])
if not registered:
event["stderr"].write("%s isn't registered" % target.nickname)
return
if not permission in permissions:
event["stderr"].write("%s already has permission '%s'" % (
target.nickname, permission))
else:
permissions.remove(permission)
if not permissions:
target.del_setting("permissions")
else:
target.set_setting("permissions", permissions)
event["stdout"].write("Removed permission '%s' from %s" % (
permission, target.nickname))
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