diff options
Diffstat (limited to 'synapse/handlers/e2e_keys.py')
| -rw-r--r-- | synapse/handlers/e2e_keys.py | 147 |
1 files changed, 69 insertions, 78 deletions
diff --git a/synapse/handlers/e2e_keys.py b/synapse/handlers/e2e_keys.py index 1148803c1e..74bceddc46 100644 --- a/synapse/handlers/e2e_keys.py +++ b/synapse/handlers/e2e_keys.py @@ -635,16 +635,14 @@ class E2eKeysHandler(object): self_device_ids = list(self_signatures.keys()) try: # get our self-signing key to verify the signatures - self_signing_key, self_signing_key_id, self_signing_verify_key \ - = yield self._get_e2e_cross_signing_verify_key( - user_id, "self_signing" - ) + self_signing_key, self_signing_key_id, self_signing_verify_key = yield self._get_e2e_cross_signing_verify_key( + user_id, "self_signing" + ) # get our master key, since it may be signed - master_key, master_key_id, master_verify_key \ - = yield self._get_e2e_cross_signing_verify_key( - user_id, "master" - ) + master_key, master_key_id, master_verify_key = yield self._get_e2e_cross_signing_verify_key( + user_id, "master" + ) # fetch our stored devices. This is used to 1. verify # signatures on the master key, and 2. to can compare with what @@ -652,15 +650,15 @@ class E2eKeysHandler(object): devices = yield self.store.get_e2e_device_keys([(user_id, None)]) if user_id not in devices: - raise SynapseError( - 404, "No device keys found", Codes.NOT_FOUND - ) + raise SynapseError(404, "No device keys found", Codes.NOT_FOUND) devices = devices[user_id] for device_id, device in self_signatures.items(): try: - if ("signatures" not in device or - user_id not in device["signatures"]): + if ( + "signatures" not in device + or user_id not in device["signatures"] + ): # no signature was sent raise SynapseError( 400, "Invalid signature", Codes.INVALID_SIGNATURE @@ -678,15 +676,21 @@ class E2eKeysHandler(object): # signature list. (In practice, we're likely to # only have only one signature anyways.) master_key_signature_list = [] - for signing_key_id, signature in device["signatures"][user_id].items(): + for signing_key_id, signature in device["signatures"][ + user_id + ].items(): alg, signing_device_id = signing_key_id.split(":", 1) - if (signing_device_id not in devices or - signing_key_id not in - devices[signing_device_id]["keys"]["keys"]): + if ( + signing_device_id not in devices + or signing_key_id + not in devices[signing_device_id]["keys"]["keys"] + ): # signed by an unknown device, or the # device does not have the key raise SynapseError( - 400, "Invalid signature", Codes.INVALID_SIGNATURE + 400, + "Invalid signature", + Codes.INVALID_SIGNATURE, ) sigs = device["signatures"] @@ -697,12 +701,12 @@ class E2eKeysHandler(object): master_key.pop("unsigned", None) if master_key != device: - raise SynapseError( - 400, "Key does not match" - ) + raise SynapseError(400, "Key does not match") # get the key and check the signature - pubkey = devices[signing_device_id]["keys"]["keys"][signing_key_id] + pubkey = devices[signing_device_id]["keys"]["keys"][ + signing_key_id + ] verify_key = decode_verify_key_bytes( signing_key_id, decode_base64(pubkey) ) @@ -711,7 +715,9 @@ class E2eKeysHandler(object): verify_signed_json(device, user_id, verify_key) except SignatureVerifyException: raise SynapseError( - 400, "Invalid signature", Codes.INVALID_SIGNATURE + 400, + "Invalid signature", + Codes.INVALID_SIGNATURE, ) master_key_signature_list.append( @@ -733,11 +739,10 @@ class E2eKeysHandler(object): try: stored_device = devices[device_id]["keys"] except KeyError: - raise SynapseError( - 404, "Unknown device", Codes.NOT_FOUND - ) - if self_signing_key_id in stored_device.get("signatures", {}) \ - .get(user_id, {}): + raise SynapseError(404, "Unknown device", Codes.NOT_FOUND) + if self_signing_key_id in stored_device.get( + "signatures", {} + ).get(user_id, {}): # we already have a signature on this device, so we # can skip it, since it should be exactly the same continue @@ -751,8 +756,9 @@ class E2eKeysHandler(object): (self_signing_key_id, user_id, device_id, signature) ) except SynapseError as e: - failures.setdefault(user_id, {})[device_id] \ - = _exception_to_failure(e) + failures.setdefault(user_id, {})[ + device_id + ] = _exception_to_failure(e) except SynapseError as e: failures[user_id] = { device: _exception_to_failure(e) @@ -766,20 +772,18 @@ class E2eKeysHandler(object): try: # get our user-signing key to verify the signatures - user_signing_key, user_signing_key_id, user_signing_verify_key \ - = yield self._get_e2e_cross_signing_verify_key( - user_id, "user_signing" - ) + user_signing_key, user_signing_key_id, user_signing_verify_key = yield self._get_e2e_cross_signing_verify_key( + user_id, "user_signing" + ) for user, devicemap in signatures.items(): device_id = None try: # get the user's master key, to make sure it matches # what was sent - stored_key, stored_key_id, _ \ - = yield self._get_e2e_cross_signing_verify_key( - user, "master", user_id - ) + stored_key, stored_key_id, _ = yield self._get_e2e_cross_signing_verify_key( + user, "master", user_id + ) # make sure that the user's master key is the one that # was signed (and no others) @@ -790,26 +794,25 @@ class E2eKeysHandler(object): device_id = None logger.error( "upload signature: wrong device: %s vs %s", - device, devicemap - ) - raise SynapseError( - 404, "Unknown device", Codes.NOT_FOUND + device, + devicemap, ) + raise SynapseError(404, "Unknown device", Codes.NOT_FOUND) key = devicemap[device_id] del devicemap[device_id] if len(devicemap) > 0: # other devices were signed -- mark those as failures logger.error("upload signature: too many devices specified") - failure = _exception_to_failure(SynapseError( - 404, "Unknown device", Codes.NOT_FOUND - )) + failure = _exception_to_failure( + SynapseError(404, "Unknown device", Codes.NOT_FOUND) + ) failures[user] = { - device: failure - for device in devicemap.keys() + device: failure for device in devicemap.keys() } - if user_signing_key_id in stored_key.get("signatures", {}) \ - .get(user_id, {}): + if user_signing_key_id in stored_key.get("signatures", {}).get( + user_id, {} + ): # we already have the signature, so we can skip it continue @@ -826,8 +829,7 @@ class E2eKeysHandler(object): failure = _exception_to_failure(e) if device_id is None: failures[user] = { - device_id: failure - for device_id in devicemap.keys() + device_id: failure for device_id in devicemap.keys() } else: failures.setdefault(user, {})[device_id] = failure @@ -835,8 +837,7 @@ class E2eKeysHandler(object): failure = _exception_to_failure(e) for user, devicemap in signature.items(): failures[user] = { - device_id: failure - for device_id in devicemap.keys() + device_id: failure for device_id in devicemap.keys() } # store the signature, and send the appropriate notifications for sync @@ -846,7 +847,9 @@ class E2eKeysHandler(object): if len(self_device_ids): yield self.device_handler.notify_device_update(user_id, self_device_ids) if len(signed_users): - yield self.device_handler.notify_user_signature_update(user_id, signed_users) + yield self.device_handler.notify_user_signature_update( + user_id, signed_users + ) defer.returnValue({"failures": failures}) @@ -858,9 +861,7 @@ class E2eKeysHandler(object): if key is None: logger.error("no %s key found for %s", key_type, user_id) raise SynapseError( - 404, - "No %s key found for %s" % (key_type, user_id), - Codes.NOT_FOUND + 404, "No %s key found for %s" % (key_type, user_id), Codes.NOT_FOUND ) key_id, verify_key = get_verify_key_from_cross_signing_key(key) return key, key_id, verify_key @@ -907,14 +908,13 @@ def _check_device_signature(user_id, verify_key, signed_device, stored_device): key_id = "%s:%s" % (verify_key.alg, verify_key.version) # make sure the device is signed - if ("signatures" not in signed_device or user_id not in signed_device["signatures"] - or key_id not in signed_device["signatures"][user_id]): + if ( + "signatures" not in signed_device + or user_id not in signed_device["signatures"] + or key_id not in signed_device["signatures"][user_id] + ): logger.error("upload signature: user not found in signatures") - raise SynapseError( - 400, - "Invalid signature", - Codes.INVALID_SIGNATURE - ) + raise SynapseError(400, "Invalid signature", Codes.INVALID_SIGNATURE) signature = signed_device["signatures"][user_id][key_id] @@ -927,28 +927,19 @@ def _check_device_signature(user_id, verify_key, signed_device, stored_device): if signed_device != stored_device: logger.error( "upload signatures: key does not match %s vs %s", - signed_device, stored_device - ) - raise SynapseError( - 400, "Key does not match", + signed_device, + stored_device, ) + raise SynapseError(400, "Key does not match") # check the signature - signed_device["signatures"] = { - user_id: { - key_id: signature - } - } + signed_device["signatures"] = {user_id: {key_id: signature}} try: verify_signed_json(signed_device, user_id, verify_key) except SignatureVerifyException: logger.error("invalid signature on key") - raise SynapseError( - 400, - "Invalid signature", - Codes.INVALID_SIGNATURE - ) + raise SynapseError(400, "Invalid signature", Codes.INVALID_SIGNATURE) def _exception_to_failure(e): |