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import asyncio
import json
import logging
from websockets.asyncio.server import serve
from websockets.asyncio.server import broadcast
import re
from passlib.hash import scrypt
import db
import uuid
import secrets
import time
version = "Helium-0.0.0a"
addr = "localhost"
port = 3636
logging.basicConfig(level=logging.INFO)
error_contexts = {
"malformedJson": "The JSON data sent to the server could not be parsed.",
"lengthInvalid": "A value in the JSON data is longer or shorter than expected.",
"invalidUsername": "Username is invalid. It may contain characters that are not permitted in usernames.",
"invalidInvite": "The invite code you are trying to use is invalid or has expired.",
"usernameTaken": "This username has been taken.",
"notExists": "The requested value does not exist.",
"lockdown": "Maintenance is in progress.",
"authed": "You are already authenticated."
}
ulist = {}
user_clients = {}
clients = []
invite_codes = ["STANLEYYELNATSAB"]
locked = False
class util:
def error(code, listener, data=None):
if code in error_contexts:
context = error_contexts[code]
else:
context = ""
response = {
"error": True,
"code": code,
"form": "helium-util",
"context": context,
"listener": listener
}
if data:
response.update(data)
return json.dumps(response)
def field_check(expects, gets):
for i in expects:
if i not in gets:
return "malformedJson"
if type(gets[i]) in [str, dict, list]:
if len(gets[i]) not in expects[i]:
return "lengthInvalid"
return True
def greeting():
return json.dumps({
"command": "greet",
"version": version,
"ulist": ulist,
"messages": [],
"locked": locked
})
def ulist():
broadcast(clients, json.dumps({
"command": "ulist",
"ulist": ulist
}))
def author_data(username):
data = db.acc.get(username)
del data["secure"]
del data["profile"]
return data
def authorize(username, conn_id, client=""):
ulist[username] = client
user_clients[conn_id] = {"username": username, "client": client}
data = db.acc.get(username)
del data["secure"]
return data
async def handler(websocket):
clients.append(websocket)
await websocket.send(util.greeting())
async for message in websocket:
try:
r = json.loads(message)
except:
await websocket.send(util.error("malformedJson", None))
continue
if "listener" not in r:
r["listener"] = None
listener = r["listener"]
if "command" not in r:
await websocket.send(util.error("malformedJson", listener))
continue
if r["command"] == "register":
fc = util.field_check({"username": range(1,21), "password": range(8,256), "invite_code": range(16,17)}, r)
if fc != True:
await websocket.send(util.error(fc, listener))
continue
if str(websocket.id) in user_clients:
await websocket.send(util.error("authed", listener))
continue
if locked:
await websocket.send(util.error("lockdown", listener))
continue
r["username"] = r["username"].lower()
r["invite_code"] = r["invite_code"].upper()
if not re.fullmatch("[a-z0-9-_]{1,20}", r["username"]):
await websocket.send(util.error("invalidUsername", listener))
continue
if r["invite_code"] not in invite_codes:
await websocket.send(util.error("invalidInvite", listener))
continue
if db.acc.get(r["username"]) != "notExists":
await websocket.send(util.error("usernameTaken", listener))
continue
data = {
"_id": str(uuid.uuid4()),
"username": r["username"],
"display_name": r["username"],
"created": round(time.time()),
"avatar": None,
"bot": False,
"verified": False,
"banned_until": 0,
"permissions": [],
"profile": {
"bio": "",
"lastfm": "",
"banner": None,
"links": {}
},
"secure": {
"password": scrypt.hash(r["password"]),
"token": secrets.token_urlsafe(64),
"ban_reason": "",
"invite_code": r["invite_code"],
"support_code": secrets.token_hex(16)
}
}
result = db.acc.add(data)
if result != True:
await websocket.send(util.error(result, listener))
continue
invite_codes.remove(r["invite_code"])
await websocket.send(json.dumps({"error": False, "token": data["secure"]["token"], "listener": listener}))
elif r["command"] == "login_pswd":
fc = util.field_check({"username": range(1,21), "password": range(8,256)}, r)
if fc != True:
await websocket.send(util.error(fc, listener))
continue
if str(websocket.id) in user_clients:
await websocket.send(util.error("authed", listener))
continue
r["username"] = r["username"].lower()
if locked:
perms = db.acc.get_perms(r["username"])
if type(perms) != list:
await websocket.send(util.error("lockdown", listener))
continue
if "LOCK" not in perms:
await websocket.send(util.error("lockdown", listener))
continue
valid = db.acc.verify_pswd(r["username"], r["password"])
if type(valid) == dict:
userdata = util.authorize(r["username"], str(websocket.id))
await websocket.send(json.dumps({"error": False, "token": valid["token"], "user": userdata, "listener": listener}))
util.ulist()
continue
elif valid == "banned":
await websocket.send(util.error(valid, listener, db.acc.get_ban(r["username"])))
continue
else:
await websocket.send(util.error(valid, listener))
continue
elif r["command"] == "login_token":
fc = util.field_check({"token": range(32,128)}, r)
if fc != True:
await websocket.send(util.error(fc, listener))
continue
if str(websocket.id) in user_clients:
await websocket.send(util.error("authed", listener))
continue
if locked:
await websocket.send(util.error("lockdown", listener))
continue
valid = db.acc.verify(r["token"])
if type(valid) == dict:
if valid["banned"]:
await websocket.send(util.error("banned", listener, db.acc.get_ban(valid["username"])))
continue
else:
userdata = util.authorize(valid["username"], str(websocket.id))
await websocket.send(json.dumps({"error": False, "user": userdata, "listener": listener}))
util.ulist()
continue
else:
await websocket.send(util.error(valid, listener))
continue
elif r["command"] == "ping":
pass
else:
await websocket.send(util.error("malformedJson", listener))
if websocket in clients:
clients.append(websocket)
async def main():
async with serve(handler, addr, port) as server:
await server.serve_forever()
asyncio.run(main())
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