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-rw-r--r--synapse/http/matrixfederationclient.py28
1 files changed, 27 insertions, 1 deletions
diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py
index 833496b72d..9145405cb0 100644
--- a/synapse/http/matrixfederationclient.py
+++ b/synapse/http/matrixfederationclient.py
@@ -27,7 +27,7 @@ import synapse.metrics
 from canonicaljson import encode_canonical_json
 
 from synapse.api.errors import (
-    SynapseError, Codes, HttpResponseException,
+    SynapseError, Codes, HttpResponseException, FederationDeniedError,
 )
 
 from signedjson.sign import sign_json
@@ -123,11 +123,22 @@ class MatrixFederationHttpClient(object):
 
             Fails with ``HTTPRequestException``: if we get an HTTP response
                 code >= 300.
+
             Fails with ``NotRetryingDestination`` if we are not yet ready
                 to retry this server.
+
+            Fails with ``FederationDeniedError`` if this destination
+                is not on our federation whitelist
+
             (May also fail with plenty of other Exceptions for things like DNS
                 failures, connection failures, SSL failures.)
         """
+        if (
+            self.hs.config.federation_domain_whitelist and
+            destination not in self.hs.config.federation_domain_whitelist
+        ):
+            raise FederationDeniedError(destination)
+
         limiter = yield synapse.util.retryutils.get_retry_limiter(
             destination,
             self.clock,
@@ -308,6 +319,9 @@ class MatrixFederationHttpClient(object):
 
             Fails with ``NotRetryingDestination`` if we are not yet ready
             to retry this server.
+
+            Fails with ``FederationDeniedError`` if this destination
+            is not on our federation whitelist
         """
 
         if not json_data_callback:
@@ -368,6 +382,9 @@ class MatrixFederationHttpClient(object):
 
             Fails with ``NotRetryingDestination`` if we are not yet ready
             to retry this server.
+
+            Fails with ``FederationDeniedError`` if this destination
+            is not on our federation whitelist
         """
 
         def body_callback(method, url_bytes, headers_dict):
@@ -422,6 +439,9 @@ class MatrixFederationHttpClient(object):
 
             Fails with ``NotRetryingDestination`` if we are not yet ready
             to retry this server.
+
+            Fails with ``FederationDeniedError`` if this destination
+            is not on our federation whitelist
         """
         logger.debug("get_json args: %s", args)
 
@@ -475,6 +495,9 @@ class MatrixFederationHttpClient(object):
 
             Fails with ``NotRetryingDestination`` if we are not yet ready
             to retry this server.
+
+            Fails with ``FederationDeniedError`` if this destination
+            is not on our federation whitelist
         """
 
         response = yield self._request(
@@ -518,6 +541,9 @@ class MatrixFederationHttpClient(object):
 
             Fails with ``NotRetryingDestination`` if we are not yet ready
             to retry this server.
+
+            Fails with ``FederationDeniedError`` if this destination
+            is not on our federation whitelist
         """
 
         encoded_args = {}