diff options
Diffstat (limited to 'synapse/handlers/auth.py')
| -rw-r--r-- | synapse/handlers/auth.py | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py index 36f2450e2e..8a6666a4ad 100644 --- a/synapse/handlers/auth.py +++ b/synapse/handlers/auth.py @@ -17,6 +17,7 @@ import logging import time import unicodedata import urllib.parse +from binascii import crc32 from typing import ( TYPE_CHECKING, Any, @@ -34,6 +35,7 @@ from typing import ( import attr import bcrypt import pymacaroons +import unpaddedbase64 from twisted.web.server import Request @@ -66,6 +68,7 @@ from synapse.util import stringutils as stringutils from synapse.util.async_helpers import maybe_awaitable from synapse.util.macaroons import get_value_from_macaroon, satisfy_expiry from synapse.util.msisdn import phone_number_to_msisdn +from synapse.util.stringutils import base62_encode from synapse.util.threepids import canonicalise_email if TYPE_CHECKING: @@ -808,10 +811,12 @@ class AuthHandler(BaseHandler): logger.info( "Logging in user %s as %s%s", user_id, puppets_user_id, fmt_expiry ) + target_user_id_obj = UserID.from_string(puppets_user_id) else: logger.info( "Logging in user %s on device %s%s", user_id, device_id, fmt_expiry ) + target_user_id_obj = UserID.from_string(user_id) if ( not is_appservice_ghost @@ -819,7 +824,7 @@ class AuthHandler(BaseHandler): ): await self.auth.check_auth_blocking(user_id) - access_token = self.macaroon_gen.generate_access_token(user_id) + access_token = self.generate_access_token(target_user_id_obj) await self.store.add_access_token_to_user( user_id=user_id, token=access_token, @@ -1192,6 +1197,19 @@ class AuthHandler(BaseHandler): return None return user_id + def generate_access_token(self, for_user: UserID) -> str: + """Generates an opaque string, for use as an access token""" + + # we use the following format for access tokens: + # syt_<base64 local part>_<random string>_<base62 crc check> + + b64local = unpaddedbase64.encode_base64(for_user.localpart.encode("utf-8")) + random_string = stringutils.random_string(20) + base = f"syt_{b64local}_{random_string}" + + crc = base62_encode(crc32(base.encode("ascii")), minwidth=6) + return f"{base}_{crc}" + async def validate_short_term_login_token( self, login_token: str ) -> LoginTokenAttributes: @@ -1585,10 +1603,7 @@ class MacaroonGenerator: hs = attr.ib() - def generate_access_token( - self, user_id: str, extra_caveats: Optional[List[str]] = None - ) -> str: - extra_caveats = extra_caveats or [] + def generate_guest_access_token(self, user_id: str) -> str: macaroon = self._generate_base_macaroon(user_id) macaroon.add_first_party_caveat("type = access") # Include a nonce, to make sure that each login gets a different @@ -1596,8 +1611,7 @@ class MacaroonGenerator: macaroon.add_first_party_caveat( "nonce = %s" % (stringutils.random_string_with_symbols(16),) ) - for caveat in extra_caveats: - macaroon.add_first_party_caveat(caveat) + macaroon.add_first_party_caveat("guest = true") return macaroon.serialize() def generate_short_term_login_token( |