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Modules shared by rabbitmq-server and rabbitmq-erlang-client
Retired package: Release invalid - src/rabbit_common.app.src is missing in the release
Security advisory:
This version has known vulnerabilities.
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Files
src/rabbit_ssl_options.erl
%% The contents of this file are subject to the Mozilla Public License
%% Version 1.1 (the "License"); you may not use this file except in
%% compliance with the License. You may obtain a copy of the License
%% at https://www.mozilla.org/MPL/
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and
%% limitations under the License.
%%
%% The Original Code is RabbitMQ.
%%
%% The Initial Developer of the Original Code is GoPivotal, Inc.
%% Copyright (c) 2007-2017 Pivotal Software, Inc. All rights reserved.
%%
-module(rabbit_ssl_options).
-export([fix/1]).
-define(BAD_SSL_PROTOCOL_VERSIONS, [
%% POODLE
sslv3,
%% Client side of TLS 1.3 is not yet
%% implemented in Erlang/OTP 22.0
%% prereleases. As a consequence,
%% not sure about the stability of
%% the server side.
%%
%% FIXME: Revisit this decision when
%% Erlang/OTP 22.0 final release is
%% out.
'tlsv1.3'
]).
-spec fix(rabbit_types:infos()) -> rabbit_types:infos().
fix(Config) ->
fix_verify_fun(fix_ssl_protocol_versions(Config)).
fix_verify_fun(SslOptsConfig) ->
%% Starting with ssl 4.0.1 in Erlang R14B, the verify_fun function
%% takes 3 arguments and returns a tuple.
case rabbit_misc:pget(verify_fun, SslOptsConfig) of
{Module, Function, InitialUserState} ->
Fun = make_verify_fun(Module, Function, InitialUserState),
rabbit_misc:pset(verify_fun, Fun, SslOptsConfig);
{Module, Function} when is_atom(Module) ->
Fun = make_verify_fun(Module, Function, none),
rabbit_misc:pset(verify_fun, Fun, SslOptsConfig);
{Verifyfun, _InitialUserState} when is_function(Verifyfun, 3) ->
SslOptsConfig;
undefined ->
SslOptsConfig
end.
make_verify_fun(Module, Function, InitialUserState) ->
try
%% Preload the module: it is required to use
%% erlang:function_exported/3.
Module:module_info()
catch
_:Exception ->
rabbit_log:error("SSL verify_fun: module ~s missing: ~p~n",
[Module, Exception]),
throw({error, {invalid_verify_fun, missing_module}})
end,
NewForm = erlang:function_exported(Module, Function, 3),
OldForm = erlang:function_exported(Module, Function, 1),
case {NewForm, OldForm} of
{true, _} ->
%% This verify_fun is supported by Erlang R14B+ (ssl
%% 4.0.1 and later).
Fun = fun(OtpCert, Event, UserState) ->
Module:Function(OtpCert, Event, UserState)
end,
{Fun, InitialUserState};
{_, true} ->
%% This verify_fun is supported by Erlang R14B+ for
%% undocumented backward compatibility.
%%
%% InitialUserState is ignored in this case.
fun(Args) ->
Module:Function(Args)
end;
_ ->
rabbit_log:error("SSL verify_fun: no ~s:~s/3 exported~n",
[Module, Function]),
throw({error, {invalid_verify_fun, function_not_exported}})
end.
fix_ssl_protocol_versions(Config) ->
case application:get_env(rabbit, ssl_allow_poodle_attack) of
{ok, true} ->
Config;
_ ->
Configured = case rabbit_misc:pget(versions, Config) of
undefined -> rabbit_misc:pget(available,
ssl:versions(),
[]);
Vs -> Vs
end,
rabbit_misc:pset(versions, Configured -- ?BAD_SSL_PROTOCOL_VERSIONS, Config)
end.