diff options
Diffstat (limited to 'synapse/handlers/auth.py')
| -rw-r--r-- | synapse/handlers/auth.py | 124 |
1 files changed, 110 insertions, 14 deletions
diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py index 4b66a9862f..61607cf2ba 100644 --- a/synapse/handlers/auth.py +++ b/synapse/handlers/auth.py @@ -18,6 +18,7 @@ import time import unicodedata import urllib.parse from binascii import crc32 +from http import HTTPStatus from typing import ( TYPE_CHECKING, Any, @@ -38,6 +39,7 @@ import attr import bcrypt import pymacaroons import unpaddedbase64 +from pymacaroons.exceptions import MacaroonVerificationFailedException from twisted.web.server import Request @@ -181,8 +183,11 @@ class LoginTokenAttributes: user_id = attr.ib(type=str) - # the SSO Identity Provider that the user authenticated with, to get this token auth_provider_id = attr.ib(type=str) + """The SSO Identity Provider that the user authenticated with, to get this token.""" + + auth_provider_session_id = attr.ib(type=Optional[str]) + """The session ID advertised by the SSO Identity Provider.""" class AuthHandler: @@ -756,53 +761,109 @@ class AuthHandler: async def refresh_token( self, refresh_token: str, - valid_until_ms: Optional[int], - ) -> Tuple[str, str]: + access_token_valid_until_ms: Optional[int], + refresh_token_valid_until_ms: Optional[int], + ) -> Tuple[str, str, Optional[int]]: """ Consumes a refresh token and generate both a new access token and a new refresh token from it. The consumed refresh token is considered invalid after the first use of the new access token or the new refresh token. + The lifetime of both the access token and refresh token will be capped so that they + do not exceed the session's ultimate expiry time, if applicable. + Args: refresh_token: The token to consume. - valid_until_ms: The expiration timestamp of the new access token. - + access_token_valid_until_ms: The expiration timestamp of the new access token. + None if the access token does not expire. + refresh_token_valid_until_ms: The expiration timestamp of the new refresh token. + None if the refresh token does not expire. Returns: - A tuple containing the new access token and refresh token + A tuple containing: + - the new access token + - the new refresh token + - the actual expiry time of the access token, which may be earlier than + `access_token_valid_until_ms`. """ # Verify the token signature first before looking up the token if not self._verify_refresh_token(refresh_token): - raise SynapseError(401, "invalid refresh token", Codes.UNKNOWN_TOKEN) + raise SynapseError( + HTTPStatus.UNAUTHORIZED, "invalid refresh token", Codes.UNKNOWN_TOKEN + ) existing_token = await self.store.lookup_refresh_token(refresh_token) if existing_token is None: - raise SynapseError(401, "refresh token does not exist", Codes.UNKNOWN_TOKEN) + raise SynapseError( + HTTPStatus.UNAUTHORIZED, + "refresh token does not exist", + Codes.UNKNOWN_TOKEN, + ) if ( existing_token.has_next_access_token_been_used or existing_token.has_next_refresh_token_been_refreshed ): raise SynapseError( - 403, "refresh token isn't valid anymore", Codes.FORBIDDEN + HTTPStatus.FORBIDDEN, + "refresh token isn't valid anymore", + Codes.FORBIDDEN, ) + now_ms = self._clock.time_msec() + + if existing_token.expiry_ts is not None and existing_token.expiry_ts < now_ms: + + raise SynapseError( + HTTPStatus.FORBIDDEN, + "The supplied refresh token has expired", + Codes.FORBIDDEN, + ) + + if existing_token.ultimate_session_expiry_ts is not None: + # This session has a bounded lifetime, even across refreshes. + + if access_token_valid_until_ms is not None: + access_token_valid_until_ms = min( + access_token_valid_until_ms, + existing_token.ultimate_session_expiry_ts, + ) + else: + access_token_valid_until_ms = existing_token.ultimate_session_expiry_ts + + if refresh_token_valid_until_ms is not None: + refresh_token_valid_until_ms = min( + refresh_token_valid_until_ms, + existing_token.ultimate_session_expiry_ts, + ) + else: + refresh_token_valid_until_ms = existing_token.ultimate_session_expiry_ts + if existing_token.ultimate_session_expiry_ts < now_ms: + raise SynapseError( + HTTPStatus.FORBIDDEN, + "The session has expired and can no longer be refreshed", + Codes.FORBIDDEN, + ) + ( new_refresh_token, new_refresh_token_id, ) = await self.create_refresh_token_for_user_id( - user_id=existing_token.user_id, device_id=existing_token.device_id + user_id=existing_token.user_id, + device_id=existing_token.device_id, + expiry_ts=refresh_token_valid_until_ms, + ultimate_session_expiry_ts=existing_token.ultimate_session_expiry_ts, ) access_token = await self.create_access_token_for_user_id( user_id=existing_token.user_id, device_id=existing_token.device_id, - valid_until_ms=valid_until_ms, + valid_until_ms=access_token_valid_until_ms, refresh_token_id=new_refresh_token_id, ) await self.store.replace_refresh_token( existing_token.token_id, new_refresh_token_id ) - return access_token, new_refresh_token + return access_token, new_refresh_token, access_token_valid_until_ms def _verify_refresh_token(self, token: str) -> bool: """ @@ -836,6 +897,8 @@ class AuthHandler: self, user_id: str, device_id: str, + expiry_ts: Optional[int], + ultimate_session_expiry_ts: Optional[int], ) -> Tuple[str, int]: """ Creates a new refresh token for the user with the given user ID. @@ -843,6 +906,13 @@ class AuthHandler: Args: user_id: canonical user ID device_id: the device ID to associate with the token. + expiry_ts (milliseconds since the epoch): Time after which the + refresh token cannot be used. + If None, the refresh token never expires until it has been used. + ultimate_session_expiry_ts (milliseconds since the epoch): + Time at which the session will end and can not be extended any + further. + If None, the session can be refreshed indefinitely. Returns: The newly created refresh token and its ID in the database @@ -852,6 +922,8 @@ class AuthHandler: user_id=user_id, token=refresh_token, device_id=device_id, + expiry_ts=expiry_ts, + ultimate_session_expiry_ts=ultimate_session_expiry_ts, ) return refresh_token, refresh_token_id @@ -1582,6 +1654,7 @@ class AuthHandler: client_redirect_url: str, extra_attributes: Optional[JsonDict] = None, new_user: bool = False, + auth_provider_session_id: Optional[str] = None, ) -> None: """Having figured out a mxid for this user, complete the HTTP request @@ -1597,6 +1670,7 @@ class AuthHandler: during successful login. Must be JSON serializable. new_user: True if we should use wording appropriate to a user who has just registered. + auth_provider_session_id: The session ID from the SSO IdP received during login. """ # If the account has been deactivated, do not proceed with the login # flow. @@ -1617,6 +1691,7 @@ class AuthHandler: extra_attributes, new_user=new_user, user_profile_data=profile, + auth_provider_session_id=auth_provider_session_id, ) def _complete_sso_login( @@ -1628,6 +1703,7 @@ class AuthHandler: extra_attributes: Optional[JsonDict] = None, new_user: bool = False, user_profile_data: Optional[ProfileInfo] = None, + auth_provider_session_id: Optional[str] = None, ) -> None: """ The synchronous portion of complete_sso_login. @@ -1649,7 +1725,9 @@ class AuthHandler: # Create a login token login_token = self.macaroon_gen.generate_short_term_login_token( - registered_user_id, auth_provider_id=auth_provider_id + registered_user_id, + auth_provider_id=auth_provider_id, + auth_provider_session_id=auth_provider_session_id, ) # Append the login token to the original redirect URL (i.e. with its query @@ -1754,6 +1832,7 @@ class MacaroonGenerator: self, user_id: str, auth_provider_id: str, + auth_provider_session_id: Optional[str] = None, duration_in_ms: int = (2 * 60 * 1000), ) -> str: macaroon = self._generate_base_macaroon(user_id) @@ -1762,6 +1841,10 @@ class MacaroonGenerator: expiry = now + duration_in_ms macaroon.add_first_party_caveat("time < %d" % (expiry,)) macaroon.add_first_party_caveat("auth_provider_id = %s" % (auth_provider_id,)) + if auth_provider_session_id is not None: + macaroon.add_first_party_caveat( + "auth_provider_session_id = %s" % (auth_provider_session_id,) + ) return macaroon.serialize() def verify_short_term_login_token(self, token: str) -> LoginTokenAttributes: @@ -1783,15 +1866,28 @@ class MacaroonGenerator: user_id = get_value_from_macaroon(macaroon, "user_id") auth_provider_id = get_value_from_macaroon(macaroon, "auth_provider_id") + auth_provider_session_id: Optional[str] = None + try: + auth_provider_session_id = get_value_from_macaroon( + macaroon, "auth_provider_session_id" + ) + except MacaroonVerificationFailedException: + pass + v = pymacaroons.Verifier() v.satisfy_exact("gen = 1") v.satisfy_exact("type = login") v.satisfy_general(lambda c: c.startswith("user_id = ")) v.satisfy_general(lambda c: c.startswith("auth_provider_id = ")) + v.satisfy_general(lambda c: c.startswith("auth_provider_session_id = ")) satisfy_expiry(v, self.hs.get_clock().time_msec) v.verify(macaroon, self.hs.config.key.macaroon_secret_key) - return LoginTokenAttributes(user_id=user_id, auth_provider_id=auth_provider_id) + return LoginTokenAttributes( + user_id=user_id, + auth_provider_id=auth_provider_id, + auth_provider_session_id=auth_provider_session_id, + ) def generate_delete_pusher_token(self, user_id: str) -> str: macaroon = self._generate_base_macaroon(user_id) |