File 0006-correct-response-for-mplicit_tls-listeners... of Package guam

File 0006-correct-response-for-mplicit_tls-listeners.patch of Package guam (Revision b107a360259fcf69d4ded1f3da6784e5)

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From 18bd1abb8a1221b16b2ec53641b07d8ef49130ea Mon Sep 17 00:00:00 2001
From: Aaron Seigo <aseigo@kde.org>
Date: Fri, 1 Jul 2016 12:40:04 +0200
Subject: [PATCH 6/8] correct response for mplicit_tls listeners

---
 apps/kolab_guam/src/kolab_guam_session.erl | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/apps/kolab_guam/src/kolab_guam_session.erl b/apps/kolab_guam/src/kolab_guam_session.erl
index 1f3869b..df195a1 100644
--- a/apps/kolab_guam/src/kolab_guam_session.erl
+++ b/apps/kolab_guam/src/kolab_guam_session.erl
@@ -71,8 +71,8 @@ handle_info({ tcp, Socket, Data }, #state{ client_tls_active = false } = State)
 handle_info({ ssl, Socket, Data }, State) ->
     %lager:debug("Data coming in from client over SSL, ~p", [Data]),
     process_client_data(Socket, Data, State);
-handle_info({ server_hello, ServerHello }, #state{ imap_session = ImapSession, tls_config = TLSConfig, socket = Socket, client_tls_active = TLSActive, deflator = Deflator } = State) ->
-    CorrectedHello = correct_hello(TLSActive, TLSConfig, ServerHello),
+handle_info({ server_hello, ServerHello }, #state{ imap_session = ImapSession, tls_config = TLSConfig, socket = Socket, client_implicit_tls = ImplicitTLS, client_tls_active = TLSActive, deflator = Deflator } = State) ->
+    CorrectedHello = correct_hello(TLSActive, ImplicitTLS, TLSConfig, ServerHello),
     eimap:start_passthrough(ImapSession, self()),
     relay_response(Socket, postprocess_server_data(Deflator, <<CorrectedHello/binary, "\r\n">>), TLSActive),
     { noreply, State };
@@ -275,18 +275,26 @@ start_client_compression(Socket, TLS, Tag) ->
 set_socket_active(true, Socket) -> ssl:setopts(Socket, [{ active, once }]);
 set_socket_active(_, Socket) -> inet:setopts(Socket, [{ active, once }]).
 
--spec correct_hello(TLSActive :: true | false, TlSConfig :: [] | list(), ServerHello :: binary()) -> CorrectedHello :: binary().
-correct_hello(true, _TLSConfig, ServerHello) ->
+-spec correct_hello(TLSActive :: true | false, ImplicitTLS :: true | false, TlSConfig :: [] | list(), ServerHello :: binary()) -> CorrectedHello :: binary().
+correct_hello(true, true, _TLSConfig, ServerHello) ->
+    % the connection is already secured, so don't advertise starttls to the client
+    build_hello_for_implicit_tls(ServerHello);
+correct_hello(true, _ImplicitTLS, _TLSConfig, ServerHello) ->
     % the connection is already secured, so don't advertise starttls to the client
     ensure_hello_does_not_have_starttls(ServerHello);
-correct_hello(_TLSActive, [], ServerHello) ->
+correct_hello(_TLSActive, _ImplicitTLS, [], ServerHello) ->
     % guam does not have a TLS config and so can not provide TLS to the client
     ensure_hello_does_not_have_starttls(ServerHello);
-correct_hello(_TLSActive, _TLSConfig, ServerHello) ->
+correct_hello(_TLSActive, _ImplicitTLS, _TLSConfig, ServerHello) ->
     % guam has a TLS config, and it is not currently active, so make sure to include
     % STARTTLS in our response regardless of what the backend says
     ensure_hello_has_starttls(ServerHello).
 
+build_hello_for_implicit_tls(ServerResponse) ->
+    NoTLSCapabilities = ensure_hello_does_not_have_starttls(ServerResponse),
+    ServerIdent = proplists:get_value(server_id, ServerResponse, <<>>),
+    <<"* OK [CAPABILITIES ", NoTLSCapabilities/binary, "] ", ServerIdent/binary>>.
+
 ensure_hello_has_starttls(ServerResponse) ->
     ServerHello = proplists:get_value(capabilities, ServerResponse, <<>>),
     case binary:match(ServerHello, <<"STARTTLS">>) of
-- 
2.5.5