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#--require-config tls-certificate
import base64, binascii, os, urllib.parse
from src import ModuleManager, utils
from cryptography.hazmat.primitives import serialization, hashes
from cryptography.hazmat.primitives.asymmetric import padding
from cryptography.hazmat.backends import default_backend
LD_TYPE = ("application/ld+json; "
"profile=\"https://www.w3.org/ns/activitystreams\"")
JRD_TYPE = "application/jrd+json"
ACTIVITY_TYPE = "application/activity+json"
ACTIVITY_SETTING_PREFIX = "ap-activity-"
def _parse_username(s):
username, _, instance = s.rpartition("@")
if username.startswith("@"):
username = username[1:]
if username and instance:
return username, instance
return None, None
def _format_username(username, instance):
return "@%s@%s" % (username, instance)
def _setting_parse(s):
username, instance = _parse_username(s)
if username and instance:
return _format_username(username, instance)
return None
@utils.export("botset", utils.FunctionSetting(_setting_parse, "fediverse",
help="Set the bot's fediverse server account",
example="@gargron@mastodon.social"))
class Module(ModuleManager.BaseModule):
_name = "Fedi"
def _random_id(self):
return binascii.hexlify(os.urandom(3)).decode("ascii")
def _get_activities(self):
activities = []
for setting, (content, timestamp) in self.bot.find_settings_prefix(
ACTIVITY_SETTING_PREFIX):
activity_id = setting.replace(ACTIVITY_SETTING_PREFIX, "", 1)
activities.append([activity_id, content, timestamp])
return activities
def _make_activity(self, content):
timestamp = utils.iso8601_format_now()
activity_id = self._random_id()
self.bot.set_setting("ap-activity-%s" % activity_id,
[content, timestamp])
return activity_id
@utils.hook("received.command.toot")
@utils.kwarg("min_args", 1)
@utils.kwarg("permission", "toot")
def toot(self, event):
activity_id = self._make_activity(event["args"])
event["stdout"].write("Sent toot %s" % activity_id)
def _federate_activity(self, activity_id, content, timestamp):
message = {
"@context": "https://www.w3.org/ns/activitystreams",
"type": "Announce",
"to": [],
"actor": "",
"object": ""
}
def _federate(self, data):
our_username, our_instance = self._ap_self()
key_id = self._ap_keyid_url(url_for, our_username)
now = email.utils.formatdate(timeval=None, localtime=False, usegmt=True)
url_for = self.exports.get_one("url-for")
key = security.private_key(self.bot.config["tls-certificate"])
for inbox in self._get_inboxes():
parts = urllib.parse.urlparse(inbox)
headers = [
["host", parts.netloc],
["date", now]
]
sign_headers = headers[:]
sign_headers.insert(0, ["(request-target)", "post %s" % parts.path])
signature = security.signature(key, key_id, sign_headers)
data = ""
request = utils.http.Request(inbox, data=data, headers=headers,
content_type=ACTIVITY_TYPE, useragent="BitBot Fediverse")
utils.http.request()
def _ap_self(self):
our_username = self.bot.get_setting("fediverse", None)
return _parse_username(our_username)
def _ap_url(self, url_for, fragment, kwargs):
return "https://%s" % url_for("api", fragment, kwargs)
def _ap_self_url(self, url_for, our_username):
return self._ap_url(url_for, "ap-user", {"u": our_username})
def _ap_inbox_url(self, url_for, our_username):
return self._ap_url(url_for, "ap-inbox", {"u": our_username})
def _ap_outbox_url(self, url_for, our_username):
return self._ap_url(url_for, "ap-outbox", {"u": our_username})
def _ap_activity_url(self, url_for, activity_id):
return self._ap_url(url_for, "ap-activity", {"a": activity_id})
def _ap_keyid_url(self, url_for, our_username):
return "%s#key" % self._ap_self_url(url_for, our_username)
@utils.hook("api.get.ap-webfinger")
@utils.kwarg("authenticated", False)
def ap_webfinger(self, event):
our_username, our_instance = self._ap_self()
resource = event["params"].get("resource", None)
if resource.startswith("acct:"):
resource = resource.split(":", 1)[1]
if resource:
requested_username, requested_instance = _parse_username(resource)
if (requested_username == our_username and
requested_instance == our_instance):
self_id = self._ap_self_url(event["url_for"], our_username)
event["response"].content_type = JRD_TYPE
event["response"].write_json({
"aliases": [self_id],
"links": [{
"href": self_id,
"rel": "self",
"type": ACTIVITY_TYPE
}],
"subject": "acct:%s" % resource
})
else:
event["response"].code = 404
else:
event["response"].code = 400
@utils.hook("api.get.ap-user")
@utils.kwarg("authenticated", False)
def ap_user(self, event):
our_username, our_instance = self._ap_self()
username = event["params"].get("u", None)
if username and username == our_username:
self_id = self._ap_self_url(event["url_for"], our_username)
inbox = self._ap_inbox_url(event["url_for"], our_username)
outbox = self._ap_outbox_url(event["url_for"], our_username)
cert_filename = self.bot.config["tls-certificate"]
with open(cert_filename) as cert_file:
cert = cert_file.read().strip()
event["response"].content_type = LD_TYPE
event["response"].write_json({
"@context": "https://www.w3.org/ns/activitystreams",
"id": self_id, "url": self_id,
"type": "Person",
"summary": "beep boop",
"preferredUsername": our_username, "name": our_username,
"inbox": inbox,
"outbox": outbox,
"publicKey": {
"id": "%s#key" % self_id,
"owner": self_id,
"publicKeyPem": cert
}
})
else:
event["response"].code = 404
def _prepare_activity(self, url_for, self_id, activity_id, content,
timestamp):
activity_url = self._ap_activity_url(url_for, activity_id)
context = "data:%s" % activity_id
return activity_url, {
"attributedTo": self_id,
"content": content,
"conversation": context, "context": context,
"id": activity_url, "url": activity_url,
"published": timestamp,
"summary": "", # content warning here
"to": "https://www.w3.org/ns/activitystreams#Public",
"type": "Note",
}
@utils.hook("api.get.ap-outbox")
@utils.kwarg("authenticated", False)
def ap_outbox(self, event):
our_username, our_instance = self._ap_self()
username = event["params"].get("u", None)
if username and username == our_username:
self_id = self._ap_self_url(event["url_for"], our_username)
outbox = self._ap_outbox_url(event["url_for"], our_username)
activities = []
for activity_id, content, timestamp in self._get_activities():
activity_url, activity_object = self._prepare_activity(
event["url_for"], self_id, activity_id, content, timestamp)
activities.append({
"actor": self_id,
"id": activity_url,
"object": activity_object,
"published": timestamp,
"to": "https://www.w3.org/ns/activitystreams#Public",
"type": "Create"
})
event["response"].content_type = LD_TYPE
event["response"].write_json({
"@context": "https://www.w3.org/ns/activitystreams",
"id": outbox,
"orderedItems": activities,
"totalItems": len(activities),
"type": "OrderedCollection"
})
else:
event["response"].code = 404
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