diff options
Diffstat (limited to 'synapse/handlers/auth.py')
| -rw-r--r-- | synapse/handlers/auth.py | 88 |
1 files changed, 33 insertions, 55 deletions
diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py index 7a0f54ca24..54a71c49d2 100644 --- a/synapse/handlers/auth.py +++ b/synapse/handlers/auth.py @@ -102,8 +102,9 @@ class AuthHandler(BaseHandler): login_types.append(t) self._supported_login_types = login_types - self._account_ratelimiter = Ratelimiter() - self._failed_attempts_ratelimiter = Ratelimiter() + # Ratelimiter for failed auth during UIA. Uses same ratelimit config + # as per `rc_login.failed_attempts`. + self._failed_uia_attempts_ratelimiter = Ratelimiter() self._clock = self.hs.get_clock() @@ -133,12 +134,38 @@ class AuthHandler(BaseHandler): AuthError if the client has completed a login flow, and it gives a different user to `requester` + + LimitExceededError if the ratelimiter's failed request count for this + user is too high to proceed + """ + user_id = requester.user.to_string() + + # Check if we should be ratelimited due to too many previous failed attempts + self._failed_uia_attempts_ratelimiter.ratelimit( + user_id, + time_now_s=self._clock.time(), + rate_hz=self.hs.config.rc_login_failed_attempts.per_second, + burst_count=self.hs.config.rc_login_failed_attempts.burst_count, + update=False, + ) + # build a list of supported flows flows = [[login_type] for login_type in self._supported_login_types] - result, params, _ = yield self.check_auth(flows, request_body, clientip) + try: + result, params, _ = yield self.check_auth(flows, request_body, clientip) + except LoginError: + # Update the ratelimite to say we failed (`can_do_action` doesn't raise). + self._failed_uia_attempts_ratelimiter.can_do_action( + user_id, + time_now_s=self._clock.time(), + rate_hz=self.hs.config.rc_login_failed_attempts.per_second, + burst_count=self.hs.config.rc_login_failed_attempts.burst_count, + update=True, + ) + raise # find the completed login type for login_type in self._supported_login_types: @@ -223,7 +250,7 @@ class AuthHandler(BaseHandler): # could continue registration from your phone having clicked the # email auth link on there). It's probably too open to abuse # because it lets unauthenticated clients store arbitrary objects - # on a home server. + # on a homeserver. # Revisit: Assumimg the REST APIs do sensible validation, the data # isn't arbintrary. session["clientdict"] = clientdict @@ -501,11 +528,8 @@ class AuthHandler(BaseHandler): multiple matches Raises: - LimitExceededError if the ratelimiter's login requests count for this - user is too high too proceed. UserDeactivatedError if a user is found but is deactivated. """ - self.ratelimit_login_per_account(user_id) res = yield self._find_user_id_and_pwd_hash(user_id) if res is not None: return res[0] @@ -572,8 +596,6 @@ class AuthHandler(BaseHandler): StoreError if there was a problem accessing the database SynapseError if there was a problem with the request LoginError if there was an authentication problem. - LimitExceededError if the ratelimiter's login requests count for this - user is too high too proceed. """ if username.startswith("@"): @@ -581,8 +603,6 @@ class AuthHandler(BaseHandler): else: qualified_user_id = UserID(username, self.hs.hostname).to_string() - self.ratelimit_login_per_account(qualified_user_id) - login_type = login_submission.get("type") known_login_type = False @@ -650,15 +670,6 @@ class AuthHandler(BaseHandler): if not known_login_type: raise SynapseError(400, "Unknown login type %s" % login_type) - # unknown username or invalid password. - self._failed_attempts_ratelimiter.ratelimit( - qualified_user_id.lower(), - time_now_s=self._clock.time(), - rate_hz=self.hs.config.rc_login_failed_attempts.per_second, - burst_count=self.hs.config.rc_login_failed_attempts.burst_count, - update=True, - ) - # We raise a 403 here, but note that if we're doing user-interactive # login, it turns all LoginErrors into a 401 anyway. raise LoginError(403, "Invalid password", errcode=Codes.FORBIDDEN) @@ -710,10 +721,6 @@ class AuthHandler(BaseHandler): Returns: Deferred[unicode] the canonical_user_id, or Deferred[None] if unknown user/bad password - - Raises: - LimitExceededError if the ratelimiter's login requests count for this - user is too high too proceed. """ lookupres = yield self._find_user_id_and_pwd_hash(user_id) if not lookupres: @@ -742,7 +749,7 @@ class AuthHandler(BaseHandler): auth_api.validate_macaroon(macaroon, "login", user_id) except Exception: raise AuthError(403, "Invalid token", errcode=Codes.FORBIDDEN) - self.ratelimit_login_per_account(user_id) + yield self.auth.check_auth_blocking(user_id) return user_id @@ -810,7 +817,7 @@ class AuthHandler(BaseHandler): @defer.inlineCallbacks def add_threepid(self, user_id, medium, address, validated_at): # 'Canonicalise' email addresses down to lower case. - # We've now moving towards the Home Server being the entity that + # We've now moving towards the homeserver being the entity that # is responsible for validating threepids used for resetting passwords # on accounts, so in future Synapse will gain knowledge of specific # types (mediums) of threepid. For now, we still use the existing @@ -912,35 +919,6 @@ class AuthHandler(BaseHandler): else: return defer.succeed(False) - def ratelimit_login_per_account(self, user_id): - """Checks whether the process must be stopped because of ratelimiting. - - Checks against two ratelimiters: the generic one for login attempts per - account and the one specific to failed attempts. - - Args: - user_id (unicode): complete @user:id - - Raises: - LimitExceededError if one of the ratelimiters' login requests count - for this user is too high too proceed. - """ - self._failed_attempts_ratelimiter.ratelimit( - user_id.lower(), - time_now_s=self._clock.time(), - rate_hz=self.hs.config.rc_login_failed_attempts.per_second, - burst_count=self.hs.config.rc_login_failed_attempts.burst_count, - update=False, - ) - - self._account_ratelimiter.ratelimit( - user_id.lower(), - time_now_s=self._clock.time(), - rate_hz=self.hs.config.rc_login_account.per_second, - burst_count=self.hs.config.rc_login_account.burst_count, - update=True, - ) - @attr.s class MacaroonGenerator(object): |