From b3097396e7cf8d29255b4855e9bf06c6b98a549e Mon Sep 17 00:00:00 2001 From: Richard van der Hoff Date: Tue, 18 Sep 2018 17:01:12 +0100 Subject: [PATCH] Set SNI to the server_name, not whatever was in the SRV record Fixes #3843 --- synapse/http/endpoint.py | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/synapse/http/endpoint.py b/synapse/http/endpoint.py index b0c936951..91025037a 100644 --- a/synapse/http/endpoint.py +++ b/synapse/http/endpoint.py @@ -108,7 +108,7 @@ def matrix_federation_endpoint(reactor, destination, tls_client_options_factory= Args: reactor: Twisted reactor. - destination (bytes): The name of the server to connect to. + destination (unicode): The name of the server to connect to. tls_client_options_factory (synapse.crypto.context_factory.ClientTLSOptionsFactory): Factory which generates TLS options for client connections. @@ -126,10 +126,17 @@ def matrix_federation_endpoint(reactor, destination, tls_client_options_factory= transport_endpoint = HostnameEndpoint default_port = 8008 else: + # the SNI string should be the same as the Host header, minus the port. + # as per https://github.com/matrix-org/synapse/issues/2525#issuecomment-336896777, + # the Host header and SNI should therefore be the server_name of the remote + # server. + tls_options = tls_client_options_factory.get_options(domain) + def transport_endpoint(reactor, host, port, timeout): return wrapClientTLS( - tls_client_options_factory.get_options(host), - HostnameEndpoint(reactor, host, port, timeout=timeout)) + tls_options, + HostnameEndpoint(reactor, host, port, timeout=timeout), + ) default_port = 8448 if port is None: