diff options
| -rw-r--r-- | synapse/crypto/keyring.py | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/synapse/crypto/keyring.py b/synapse/crypto/keyring.py index 22ee0fc93f..9b17ef0a08 100644 --- a/synapse/crypto/keyring.py +++ b/synapse/crypto/keyring.py @@ -27,10 +27,12 @@ from synapse.util.metrics import Measure from twisted.internet import defer from signedjson.sign import ( - verify_signed_json, signature_ids, sign_json, encode_canonical_json + verify_signed_json, signature_ids, sign_json, encode_canonical_json, + SignatureVerifyException, ) from signedjson.key import ( - is_signing_algorithm_supported, decode_verify_key_bytes + is_signing_algorithm_supported, decode_verify_key_bytes, + encode_verify_key_base64, ) from unpaddedbase64 import decode_base64, encode_base64 @@ -56,7 +58,7 @@ Attributes: key_ids(set(str)): The set of key_ids to that could be used to verify the JSON object json_object(dict): The JSON object to verify. - deferred(twisted.internet.defer.Deferred): + deferred(Deferred[str, str, nacl.signing.VerifyKey]): A deferred (server_name, key_id, verify_key) tuple that resolves when a verify key has been fetched. The deferreds' callbacks are run with no logcontext. @@ -736,6 +738,17 @@ class Keyring(object): @defer.inlineCallbacks def _handle_key_deferred(verify_request): + """Waits for the key to become available, and then performs a verification + + Args: + verify_request (VerifyKeyRequest): + + Returns: + Deferred[None] + + Raises: + SynapseError if there was a problem performing the verification + """ server_name = verify_request.server_name try: with PreserveLoggingContext(): @@ -768,11 +781,17 @@ def _handle_key_deferred(verify_request): )) try: verify_signed_json(json_object, server_name, verify_key) - except Exception: + except SignatureVerifyException as e: + logger.debug( + "Error verifying signature for %s:%s:%s with key %s: %s", + server_name, verify_key.alg, verify_key.version, + encode_verify_key_base64(verify_key), + str(e), + ) raise SynapseError( 401, - "Invalid signature for server %s with key %s:%s" % ( - server_name, verify_key.alg, verify_key.version + "Invalid signature for server %s with key %s:%s: %s" % ( + server_name, verify_key.alg, verify_key.version, str(e), ), Codes.UNAUTHORIZED, ) |