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import asyncio
import base64
import binascii
import http.server
import http_ece
import json
import os
import queue
import quopri
import threading
from _utils import HawkTokenAuth, APIClient, hexstr
from aiosmtpd.controller import Controller
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.primitives.asymmetric import ec
from fxa.crypto import quick_stretch_password, derive_key, xor
API_PORT = int(os.environ.get('API_PORT', 8000))
PUSH_PORT = API_PORT + 1
SMTP_PORT = int(os.environ.get('MAIL_PORT', 2525))
AUTH_URL = f"http://localhost:{API_PORT}/auth"
PROFILE_URL = f"http://localhost:{API_PORT}/profile"
OAUTH_URL = f"http://localhost:{API_PORT}/oauth"
INVITE_URL = f"http://localhost:{API_PORT}/_invite"
def auth_pw(email, pw):
return derive_key(quick_stretch_password(email, pw), "authPW").hex()
class AuthClient:
def __init__(self, /, email=None, session=None, bearer=None, props=None):
self.password = ""
self.client = APIClient(f"{AUTH_URL}/v1")
self.email = email
assert int(session is not None) + int(bearer is not None) < 2
self.session = session
self.auth = HawkTokenAuth(session, "sessionToken", self.client) if session else None
self.bearer = bearer
self.headers = { 'authorization': f'bearer {bearer}' } if bearer else {}
self.props = props
def post(self, url, json=None, **kwds):
return self.client.post(url, json, **kwds)
def post_a(self, url, json=None, **kwds):
kwds.setdefault('headers', {})
kwds['headers'] |= self.headers
return self.client.post(url, json, auth=self.auth, **kwds)
def get(self, url, **kwds):
return self.client.get(url, **kwds)
def get_a(self, url, **kwds):
kwds.setdefault('headers', {})
kwds['headers'] |= self.headers
return self.client.get(url, auth=self.auth, **kwds)
def delete(self, url, **kwds):
return self.client.delete(url, **kwds)
def delete_a(self, url, **kwds):
kwds.setdefault('headers', {})
kwds['headers'] |= self.headers
return self.client.delete(url, auth=self.auth, **kwds)
def create_account(self, email, pw, keys=None, invite=None, **kwds):
body = {
"email": email,
"authPW": hexstr(derive_key(quick_stretch_password(email, pw), "authPW")),
"style": invite,
}
params = { 'keys': str(keys).lower() } if keys is not None else {}
resp = self.client.post("/account/create", body, params=params, **kwds)
return AuthClient(email=email, session=resp['sessionToken'], props=resp)
def destroy_account(self, email, pw, **kwds):
body = { "email": email, "authPW": hexstr(derive_key(quick_stretch_password(email, pw), "authPW")) }
return self.client.post("/account/destroy", body)
def fetch_keys(self, key_fetch_token, pw):
pw = quick_stretch_password(self.email, pw)
auth = HawkTokenAuth(key_fetch_token, "keyFetchToken", self.client)
resp = self.client.get("/account/keys", auth=auth)
bundle = binascii.unhexlify(resp["bundle"])
keys = auth.unbundle("account/keys", bundle)
unwrap_key = derive_key(pw, "unwrapBkey")
return (keys[:32], xor(keys[32:], unwrap_key))
def login(self, email, pw, keys=None, **kwds):
body = { "email": email, "authPW": hexstr(derive_key(quick_stretch_password(email, pw), "authPW")) }
params = { "keys": str(keys).lower() } if keys is not None else {}
resp = self.client.post("/account/login", body, params=params)
return AuthClient(email=email, session=resp['sessionToken'], props=resp)
def destroy_session(self, **kwds):
return self.post_a("/session/destroy", kwds)
def profile(self):
token = self.post_a("/oauth/token", {
"client_id": "5882386c6d801776",
"ttl": 60,
"grant_type": "fxa-credentials",
"access_type": "online",
"scope": "profile:write",
})
return Profile(token['access_token'])
class Invite:
def __init__(self, token):
self.client = APIClient(f"{INVITE_URL}/v1")
self.auth = HawkTokenAuth(token, "sessionToken", self.client)
def post(self, url, json=None, **kwds):
return self.client.post(url, json, **kwds)
def post_a(self, url, json=None, **kwds):
return self.client.post(url, json, auth=self.auth, **kwds)
class PasswordChange:
def __init__(self, client, token, hkdf='passwordChangeToken'):
self.client = client
self.auth = HawkTokenAuth(token, hkdf, self.client)
def post(self, url, json=None, **kwds):
return self.client.post(url, json, **kwds)
def post_a(self, url, json=None, **kwds):
return self.client.post(url, json, auth=self.auth, **kwds)
class AccountReset:
def __init__(self, client, token):
self.client = client
self.auth = HawkTokenAuth(token, 'accountResetToken', self.client)
def post(self, url, json=None, **kwds):
return self.client.post(url, json, **kwds)
def post_a(self, url, json=None, **kwds):
return self.client.post(url, json, auth=self.auth, **kwds)
class Profile:
def __init__(self, token):
self.client = APIClient(f"{PROFILE_URL}/v1")
self.token = token
def get(self, url, **kwds):
return self.client.get(url, **kwds)
def get_a(self, url, **kwds):
kwds.setdefault('headers', {})
kwds['headers']['authorization'] = f'bearer {self.token}'
return self.client.get(url, **kwds)
def post(self, url, json=None, **kwds):
return self.client.post(url, json, **kwds)
def post_a(self, url, json=None, **kwds):
kwds.setdefault('headers', {})
kwds['headers']['authorization'] = f'bearer {self.token}'
return self.client.post(url, json, **kwds)
def delete(self, url, **kwds):
return self.client.delete(url, **kwds)
def delete_a(self, url, **kwds):
kwds.setdefault('headers', {})
kwds['headers']['authorization'] = f'bearer {self.token}'
return self.client.delete(url, **kwds)
class Oauth:
def __init__(self):
self.client = APIClient(f"{OAUTH_URL}/v1")
def post(self, url, json=None, **kwds):
return self.client.post(url, json, **kwds)
class Device:
def __init__(self, auth, name, type="desktop", commands={}, pcb=None):
self.auth = auth
dev = auth.post_a("/account/device", {
"name": name,
"type": type,
"availableCommands": commands,
} | self._mk_push(pcb))
self.id = dev['id']
self.props = dev
def _mk_push(self, pcb):
if not pcb:
return {}
self.priv = ec.generate_private_key(ec.SECP256R1, default_backend())
self.public = self.priv.public_key().public_bytes(
encoding=serialization.Encoding.X962,
format=serialization.PublicFormat.UncompressedPoint)
self.authkey = os.urandom(16)
return {
"pushCallback": pcb,
"pushPublicKey": base64.urlsafe_b64encode(self.public).decode('utf8'),
"pushAuthKey": base64.urlsafe_b64encode(self.authkey).decode('utf8'),
}
def update_pcb(self, pcb):
self.props = self.auth.post_a("/account/device", { "id": self.id } | self._mk_push(pcb))
def decrypt(self, data):
raw = http_ece.decrypt(data, private_key=self.priv, auth_secret=self.authkey)
return json.loads(raw.decode('utf8'))
class PushServer:
def __init__(self):
q = self.q = queue.Queue()
class Handler(http.server.BaseHTTPRequestHandler):
def do_POST(self):
if self.path.startswith("/err/"):
self.send_response(410)
self.end_headers()
else:
self.send_response(200)
self.end_headers()
q.put((self.path,
self.headers,
self.rfile.read(int(self.headers.get('content-length', 0)))))
server = self.server = http.server.ThreadingHTTPServer(("localhost", PUSH_PORT), Handler)
threading.Thread(target=server.serve_forever).start()
def wait(self, timeout=0.5):
return self.q.get(timeout=timeout)
def done(self, timeout=0.5):
try:
self.q.get(timeout=timeout)
return False
except queue.Empty:
return True
def good(self, id):
return f"http://localhost:{PUSH_PORT}/{id}"
def bad(self, id):
return f"http://localhost:{PUSH_PORT}/err/{id}"
class MailServer:
def __init__(self):
q = self.q = queue.Queue()
class Handler:
async def handle_RCPT(self, server, session, envelope, address, rcpt_options):
envelope.rcpt_tos.append(address)
return '250 OK'
async def handle_DATA(self, server, session, envelope):
headers, body = envelope.content.decode('utf8').split("\r\n\r\n", maxsplit=1)
if "Content-Transfer-Encoding: quoted-printable" in headers:
body = quopri.decodestring(body).decode('utf8')
q.put((envelope.rcpt_tos, body))
return '250 Message accepted for delivery'
self.controller = Controller(Handler(), hostname="localhost", port=SMTP_PORT)
self.controller.start()
def stop(self):
self.controller.stop()
def wait(self, timeout=0.5):
return self.q.get(timeout=timeout)
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