diff options
Diffstat (limited to 'synapse/crypto/keyring.py')
| -rw-r--r-- | synapse/crypto/keyring.py | 75 |
1 files changed, 40 insertions, 35 deletions
diff --git a/synapse/crypto/keyring.py b/synapse/crypto/keyring.py index 5528d0a280..17ac66731c 100644 --- a/synapse/crypto/keyring.py +++ b/synapse/crypto/keyring.py @@ -15,7 +15,9 @@ from synapse.crypto.keyclient import fetch_server_key from twisted.internet import defer -from syutil.crypto.jsonsign import verify_signed_json, signature_ids +from syutil.crypto.jsonsign import ( + verify_signed_json, signature_ids, sign_json, encode_canonical_json +) from syutil.crypto.signing_key import ( is_signing_algorithm_supported, decode_verify_key_bytes ) @@ -26,6 +28,8 @@ from synapse.util.retryutils import get_retry_limiter from OpenSSL import crypto +import urllib +import hashlib import logging @@ -37,6 +41,7 @@ class Keyring(object): self.store = hs.get_datastore() self.clock = hs.get_clock() self.client = hs.get_http_client() + self.config = hs.get_config() self.perspective_servers = {} self.hs = hs @@ -127,7 +132,6 @@ class Keyring(object): server_name, key_ids ) - for key_id in key_ids: if key_id in keys: defer.returnValue(keys[key_id]) @@ -142,17 +146,18 @@ class Keyring(object): perspective_name, self.clock, self.store ) - responses = yield self.client.post_json( - destination=perspective_name, - path=b"/_matrix/key/v2/query", - data={u"server_keys": {server_name: list(key_ids)}}, - ) + with limiter: + responses = yield self.client.post_json( + destination=perspective_name, + path=b"/_matrix/key/v2/query", + data={u"server_keys": {server_name: list(key_ids)}}, + ) - keys = dict() + keys = {} for response in responses: if (u"signatures" not in response - or perspective_name not in response[u"signatures"]): + or perspective_name not in response[u"signatures"]): raise ValueError( "Key response not signed by perspective server" " %r" % (perspective_name,) @@ -181,7 +186,9 @@ class Keyring(object): " server %r" % (perspective_name,) ) - response_keys = process_v2_response(self, server_name, key_ids) + response_keys = yield self.process_v2_response( + server_name, perspective_name, response + ) keys.update(response_keys) @@ -202,15 +209,15 @@ class Keyring(object): if requested_key_id in keys: continue - (response_json, tls_certificate) = yield fetch_server_key( + (response, tls_certificate) = yield fetch_server_key( server_name, self.hs.tls_context_factory, - path="/_matrix/key/v2/server/%s" % ( + path=(b"/_matrix/key/v2/server/%s" % ( urllib.quote(requested_key_id), - ), + )).encode("ascii"), ) if (u"signatures" not in response - or server_name not in response[u"signatures"]): + or server_name not in response[u"signatures"]): raise ValueError("Key response not signed by remote server") if "tls_fingerprints" not in response: @@ -223,17 +230,18 @@ class Keyring(object): sha256_fingerprint_b64 = encode_base64(sha256_fingerprint) response_sha256_fingerprints = set() - for fingerprint in response_json[u"tls_fingerprints"]: + for fingerprint in response[u"tls_fingerprints"]: if u"sha256" in fingerprint: response_sha256_fingerprints.add(fingerprint[u"sha256"]) - if sha256_fingerprint not in response_sha256_fingerprints: + if sha256_fingerprint_b64 not in response_sha256_fingerprints: raise ValueError("TLS certificate not allowed by fingerprints") response_keys = yield self.process_v2_response( server_name=server_name, from_server=server_name, - response_json=response_json, + requested_id=requested_key_id, + response_json=response, ) keys.update(response_keys) @@ -244,19 +252,15 @@ class Keyring(object): verify_keys=keys, ) - for key_id in key_ids: - if key_id in verify_keys: - defer.returnValue(verify_keys[key_id]) - return - - raise ValueError("No verification key found for given key ids") + defer.returnValue(keys) @defer.inlineCallbacks - def process_v2_response(self, server_name, from_server, json_response): - time_now_ms = clock.time_msec() + def process_v2_response(self, server_name, from_server, response_json, + requested_id=None): + time_now_ms = self.clock.time_msec() response_keys = {} verify_keys = {} - for key_id, key_data in response["verify_keys"].items(): + for key_id, key_data in response_json["verify_keys"].items(): if is_signing_algorithm_supported(key_id): key_base64 = key_data["key"] key_bytes = decode_base64(key_base64) @@ -264,7 +268,7 @@ class Keyring(object): verify_keys[key_id] = verify_key old_verify_keys = {} - for key_id, key_data in response["verify_keys"].items(): + for key_id, key_data in response_json["old_verify_keys"].items(): if is_signing_algorithm_supported(key_id): key_base64 = key_data["key"] key_bytes = decode_base64(key_base64) @@ -273,21 +277,21 @@ class Keyring(object): verify_key.time_added = time_now_ms old_verify_keys[key_id] = verify_key - for key_id in response["signatures"][server_name]: - if key_id not in response["verify_keys"]: + for key_id in response_json["signatures"][server_name]: + if key_id not in response_json["verify_keys"]: raise ValueError( "Key response must include verification keys for all" " signatures" ) if key_id in verify_keys: verify_signed_json( - response, + response_json, server_name, verify_keys[key_id] ) signed_key_json = sign_json( - response, + response_json, self.config.server_name, self.config.signing_key[0], ) @@ -295,7 +299,9 @@ class Keyring(object): signed_key_json_bytes = encode_canonical_json(signed_key_json) ts_valid_until_ms = signed_key_json[u"valid_until"] - updated_key_ids = set([requested_key_id]) + updated_key_ids = set() + if requested_id is not None: + updated_key_ids.add(requested_id) updated_key_ids.update(verify_keys) updated_key_ids.update(old_verify_keys) @@ -307,8 +313,8 @@ class Keyring(object): server_name=server_name, key_id=key_id, from_server=server_name, - ts_now_ms=ts_now_ms, - ts_valid_until_ms=valid_until, + ts_now_ms=time_now_ms, + ts_expires_ms=ts_valid_until_ms, key_json_bytes=signed_key_json_bytes, ) @@ -373,7 +379,6 @@ class Keyring(object): verify_keys[key_id] ) - yield self.store.store_server_certificate( server_name, server_name, |