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fix #427, tolerate servers that reject connections without SNI

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This commit is contained in:
Maximilian Hils 2014-12-15 13:02:47 +01:00
parent 4e635d7a6f
commit 120ab5c4cd
1 changed files with 16 additions and 2 deletions
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18
libmproxy/proxy/server.py
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@ -191,7 +191,15 @@ class ConnectionHandler:
options=self.config.openssl_server_options options=self.config.openssl_server_options
) )
except tcp.NetLibError as v: except tcp.NetLibError as v:
raise ProxyError(502, repr(v)) e = ProxyError(502, repr(v))
# Workaround for https://github.com/mitmproxy/mitmproxy/issues/427
# The upstream server may reject connections without SNI, which means we need to
# establish SSL with the client first, hope for a SNI (which triggers a reconnect which replaces the
# ServerConnection object) and see whether that worked.
if client and "handshake failure" in e.message:
self.server_conn.may_require_sni = e
else:
raise e
if client: if client:
if self.client_conn.ssl_established: if self.client_conn.ssl_established:
raise ProxyError(502, "SSL to Client already established.") raise ProxyError(502, "SSL to Client already established.")
@ -209,6 +217,10 @@ class ConnectionHandler:
except tcp.NetLibError as v: except tcp.NetLibError as v:
raise ProxyError(400, repr(v)) raise ProxyError(400, repr(v))
# Workaround for #427 part 2
if server and hasattr(self.server_conn, "may_require_sni"):
raise self.server_conn.may_require_sni
def server_reconnect(self, new_sni=False): def server_reconnect(self, new_sni=False):
address = self.server_conn.address address = self.server_conn.address
had_ssl = self.server_conn.ssl_established had_ssl = self.server_conn.ssl_established
@ -223,7 +235,9 @@ class ConnectionHandler:
protocol_handler(s[0])(self).handle_server_reconnect(s[1]) protocol_handler(s[0])(self).handle_server_reconnect(s[1])
self.server_conn.state = state self.server_conn.state = state
if had_ssl: # Receiving new_sni where had_ssl is False is a weird case that happens when the workaround for
# https://github.com/mitmproxy/mitmproxy/issues/427 is active. In this case, we want to establish SSL as well.
if had_ssl or new_sni:
self.establish_ssl(server=True, sni=sni) self.establish_ssl(server=True, sni=sni)
def finish(self): def finish(self):