mirror of
https://github.com/etesync/server
synced 2024-11-26 18:58:08 +00:00
317 lines
11 KiB
Python
317 lines
11 KiB
Python
import dataclasses
|
|
import typing as t
|
|
from datetime import datetime
|
|
from functools import cached_property
|
|
|
|
import nacl
|
|
import nacl.encoding
|
|
import nacl.hash
|
|
import nacl.secret
|
|
import nacl.signing
|
|
from asgiref.sync import sync_to_async
|
|
from django.conf import settings
|
|
from django.contrib.auth import get_user_model, user_logged_out, user_logged_in
|
|
from django.core import exceptions as django_exceptions
|
|
from django.db import transaction
|
|
from django.utils import timezone
|
|
from fastapi import APIRouter, Depends, status, Request
|
|
from fastapi.security import APIKeyHeader
|
|
|
|
from django_etebase import app_settings, models
|
|
from django_etebase.exceptions import EtebaseValidationError
|
|
from django_etebase.models import UserInfo
|
|
from django_etebase.signals import user_signed_up
|
|
from django_etebase.token_auth.models import AuthToken
|
|
from django_etebase.token_auth.models import get_default_expiry
|
|
from django_etebase.utils import create_user, get_user_queryset, CallbackContext
|
|
from django_etebase.views import msgpack_encode, msgpack_decode
|
|
from .exceptions import AuthenticationFailed, transform_validation_error, HttpError
|
|
from .msgpack import MsgpackRoute
|
|
from .utils import BaseModel, permission_responses
|
|
|
|
User = get_user_model()
|
|
token_scheme = APIKeyHeader(name="Authorization")
|
|
AUTO_REFRESH = True
|
|
MIN_REFRESH_INTERVAL = 60
|
|
authentication_router = APIRouter(route_class=MsgpackRoute)
|
|
|
|
|
|
@dataclasses.dataclass(frozen=True)
|
|
class AuthData:
|
|
user: User
|
|
token: AuthToken
|
|
|
|
|
|
class LoginChallengeIn(BaseModel):
|
|
username: str
|
|
|
|
|
|
class LoginChallengeOut(BaseModel):
|
|
salt: bytes
|
|
challenge: bytes
|
|
version: int
|
|
|
|
|
|
class LoginResponse(BaseModel):
|
|
username: str
|
|
challenge: bytes
|
|
host: str
|
|
action: t.Literal["login", "changePassword"]
|
|
|
|
|
|
class UserOut(BaseModel):
|
|
pubkey: bytes
|
|
encryptedContent: bytes
|
|
|
|
@classmethod
|
|
def from_orm(cls: t.Type["UserOut"], obj: User) -> "UserOut":
|
|
return cls(pubkey=obj.userinfo.pubkey, encryptedContent=obj.userinfo.encryptedContent)
|
|
|
|
|
|
class LoginOut(BaseModel):
|
|
token: str
|
|
user: UserOut
|
|
|
|
@classmethod
|
|
def from_orm(cls: t.Type["LoginOut"], obj: User) -> "LoginOut":
|
|
token = AuthToken.objects.create(user=obj).key
|
|
user = UserOut.from_orm(obj)
|
|
return cls(token=token, user=user)
|
|
|
|
|
|
class Authentication(BaseModel):
|
|
class Config:
|
|
keep_untouched = (cached_property,)
|
|
|
|
response: bytes
|
|
signature: bytes
|
|
|
|
|
|
class Login(Authentication):
|
|
@cached_property
|
|
def response_data(self) -> LoginResponse:
|
|
return LoginResponse(**msgpack_decode(self.response))
|
|
|
|
|
|
class ChangePasswordResponse(LoginResponse):
|
|
loginPubkey: bytes
|
|
encryptedContent: bytes
|
|
|
|
|
|
class ChangePassword(Authentication):
|
|
@cached_property
|
|
def response_data(self) -> ChangePasswordResponse:
|
|
return ChangePasswordResponse(**msgpack_decode(self.response))
|
|
|
|
|
|
class UserSignup(BaseModel):
|
|
username: str
|
|
email: str
|
|
|
|
|
|
class SignupIn(BaseModel):
|
|
user: UserSignup
|
|
salt: bytes
|
|
loginPubkey: bytes
|
|
pubkey: bytes
|
|
encryptedContent: bytes
|
|
|
|
|
|
def __renew_token(auth_token: AuthToken):
|
|
current_expiry = auth_token.expiry
|
|
new_expiry = get_default_expiry()
|
|
# Throttle refreshing of token to avoid db writes
|
|
delta = (new_expiry - current_expiry).total_seconds()
|
|
if delta > MIN_REFRESH_INTERVAL:
|
|
auth_token.expiry = new_expiry
|
|
auth_token.save(update_fields=("expiry",))
|
|
|
|
|
|
@sync_to_async
|
|
def __get_authenticated_user(api_token: str):
|
|
api_token = api_token.split()[1]
|
|
try:
|
|
token: AuthToken = AuthToken.objects.select_related("user").get(key=api_token)
|
|
except AuthToken.DoesNotExist:
|
|
raise AuthenticationFailed(detail="Invalid token.")
|
|
if not token.user.is_active:
|
|
raise AuthenticationFailed(detail="User inactive or deleted.")
|
|
|
|
if token.expiry is not None:
|
|
if token.expiry < timezone.now():
|
|
token.delete()
|
|
raise AuthenticationFailed(detail="Invalid token.")
|
|
|
|
if AUTO_REFRESH:
|
|
__renew_token(token)
|
|
|
|
return token.user, token
|
|
|
|
|
|
async def get_auth_data(api_token: str = Depends(token_scheme)) -> AuthData:
|
|
user, token = await __get_authenticated_user(api_token)
|
|
return AuthData(user, token)
|
|
|
|
|
|
async def get_authenticated_user(api_token: str = Depends(token_scheme)) -> User:
|
|
user, token = await __get_authenticated_user(api_token)
|
|
return user
|
|
|
|
|
|
@sync_to_async
|
|
def __get_login_user(username: str) -> User:
|
|
kwargs = {User.USERNAME_FIELD + "__iexact": username.lower()}
|
|
try:
|
|
user = User.objects.get(**kwargs)
|
|
if not hasattr(user, "userinfo"):
|
|
raise AuthenticationFailed(code="user_not_init", detail="User not properly init")
|
|
return user
|
|
except User.DoesNotExist:
|
|
raise AuthenticationFailed(code="user_not_found", detail="User not found")
|
|
|
|
|
|
async def get_login_user(challenge: LoginChallengeIn) -> User:
|
|
user = await __get_login_user(challenge.username)
|
|
return user
|
|
|
|
|
|
def get_encryption_key(salt):
|
|
key = nacl.hash.blake2b(settings.SECRET_KEY.encode(), encoder=nacl.encoding.RawEncoder)
|
|
return nacl.hash.blake2b(
|
|
b"",
|
|
key=key,
|
|
salt=salt[: nacl.hash.BLAKE2B_SALTBYTES],
|
|
person=b"etebase-auth",
|
|
encoder=nacl.encoding.RawEncoder,
|
|
)
|
|
|
|
|
|
def save_changed_password(data: ChangePassword, user: User):
|
|
response_data = data.response_data
|
|
user_info: UserInfo = user.userinfo
|
|
user_info.loginPubkey = response_data.loginPubkey
|
|
user_info.encryptedContent = response_data.encryptedContent
|
|
user_info.save()
|
|
|
|
|
|
@sync_to_async
|
|
def validate_login_request(
|
|
validated_data: LoginResponse,
|
|
challenge_sent_to_user: Authentication,
|
|
user: User,
|
|
expected_action: str,
|
|
host_from_request: str,
|
|
):
|
|
enc_key = get_encryption_key(bytes(user.userinfo.salt))
|
|
box = nacl.secret.SecretBox(enc_key)
|
|
challenge_data = msgpack_decode(box.decrypt(validated_data.challenge))
|
|
now = int(datetime.now().timestamp())
|
|
if validated_data.action != expected_action:
|
|
raise HttpError("wrong_action", f'Expected "{challenge_sent_to_user.response}" but got something else')
|
|
elif now - challenge_data["timestamp"] > app_settings.CHALLENGE_VALID_SECONDS:
|
|
raise HttpError("challenge_expired", "Login challenge has expired")
|
|
elif challenge_data["userId"] != user.id:
|
|
raise HttpError("wrong_user", "This challenge is for the wrong user")
|
|
elif not settings.DEBUG and validated_data.host.split(":", 1)[0] != host_from_request:
|
|
raise HttpError(
|
|
"wrong_host", f'Found wrong host name. Got: "{validated_data.host}" expected: "{host_from_request}"'
|
|
)
|
|
verify_key = nacl.signing.VerifyKey(bytes(user.userinfo.loginPubkey), encoder=nacl.encoding.RawEncoder)
|
|
try:
|
|
verify_key.verify(challenge_sent_to_user.response, challenge_sent_to_user.signature)
|
|
except nacl.exceptions.BadSignatureError:
|
|
raise HttpError("login_bad_signature", "Wrong password for user.", status.HTTP_401_UNAUTHORIZED)
|
|
|
|
|
|
@authentication_router.get("/is_etebase/")
|
|
async def is_etebase():
|
|
pass
|
|
|
|
|
|
@authentication_router.post("/login_challenge/", response_model=LoginChallengeOut)
|
|
async def login_challenge(user: User = Depends(get_login_user)):
|
|
enc_key = get_encryption_key(user.userinfo.salt)
|
|
box = nacl.secret.SecretBox(enc_key)
|
|
challenge_data = {
|
|
"timestamp": int(datetime.now().timestamp()),
|
|
"userId": user.id,
|
|
}
|
|
challenge = bytes(box.encrypt(msgpack_encode(challenge_data), encoder=nacl.encoding.RawEncoder))
|
|
return LoginChallengeOut(salt=user.userinfo.salt, challenge=challenge, version=user.userinfo.version)
|
|
|
|
|
|
@authentication_router.post("/login/", response_model=LoginOut)
|
|
async def login(data: Login, request: Request):
|
|
user = await get_login_user(LoginChallengeIn(username=data.response_data.username))
|
|
host = request.headers.get("Host")
|
|
await validate_login_request(data.response_data, data, user, "login", host)
|
|
data = await sync_to_async(LoginOut.from_orm)(user)
|
|
await sync_to_async(user_logged_in.send)(sender=user.__class__, request=None, user=user)
|
|
return data
|
|
|
|
|
|
@authentication_router.post("/logout/", status_code=status.HTTP_204_NO_CONTENT, responses=permission_responses)
|
|
async def logout(request: Request, auth_data: AuthData = Depends(get_auth_data)):
|
|
await sync_to_async(auth_data.token.delete)()
|
|
# XXX-TOM
|
|
await sync_to_async(user_logged_out.send)(sender=auth_data.user.__class__, request=None, user=auth_data.user)
|
|
|
|
|
|
@authentication_router.post("/change_password/", status_code=status.HTTP_204_NO_CONTENT, responses=permission_responses)
|
|
async def change_password(data: ChangePassword, request: Request, user: User = Depends(get_authenticated_user)):
|
|
host = request.headers.get("Host")
|
|
await validate_login_request(data.response_data, data, user, "changePassword", host)
|
|
await sync_to_async(save_changed_password)(data, user)
|
|
|
|
|
|
@authentication_router.post("/dashboard_url/", responses=permission_responses)
|
|
def dashboard_url(user: User = Depends(get_authenticated_user)):
|
|
# XXX-TOM
|
|
get_dashboard_url = app_settings.DASHBOARD_URL_FUNC
|
|
if get_dashboard_url is None:
|
|
raise HttpError("not_supported", "This server doesn't have a user dashboard.")
|
|
|
|
ret = {
|
|
"url": get_dashboard_url(request, *args, **kwargs),
|
|
}
|
|
return ret
|
|
|
|
|
|
def signup_save(data: SignupIn, request: Request) -> User:
|
|
user_data = data.user
|
|
with transaction.atomic():
|
|
try:
|
|
user_queryset = get_user_queryset(User.objects.all(), CallbackContext(request.path_params))
|
|
instance = user_queryset.get(**{User.USERNAME_FIELD: user_data.username.lower()})
|
|
except User.DoesNotExist:
|
|
# Create the user and save the casing the user chose as the first name
|
|
try:
|
|
instance = create_user(
|
|
**user_data.dict(),
|
|
password=None,
|
|
first_name=user_data.username,
|
|
context=CallbackContext(request.path_params),
|
|
)
|
|
instance.full_clean()
|
|
except EtebaseValidationError as e:
|
|
raise e
|
|
except django_exceptions.ValidationError as e:
|
|
transform_validation_error("user", e)
|
|
except Exception as e:
|
|
raise HttpError("generic", str(e))
|
|
|
|
if hasattr(instance, "userinfo"):
|
|
raise HttpError("user_exists", "User already exists", status_code=status.HTTP_409_CONFLICT)
|
|
|
|
models.UserInfo.objects.create(**data.dict(exclude={"user"}), owner=instance)
|
|
return instance
|
|
|
|
|
|
@authentication_router.post("/signup/", response_model=LoginOut, status_code=status.HTTP_201_CREATED)
|
|
async def signup(data: SignupIn, request: Request):
|
|
user = await sync_to_async(signup_save)(data, request)
|
|
# XXX-TOM
|
|
data = await sync_to_async(LoginOut.from_orm)(user)
|
|
await sync_to_async(user_signed_up.send)(sender=user.__class__, request=None, user=user)
|
|
return data
|