Initial commit

.gitignore

@@ -0,0 +1,19 @@
+.rebar3
+_*
+.eunit
+*.o
+*.beam
+*.plt
+*.swp
+*.swo
+.erlang.cookie
+ebin
+log
+erl_crash.dump
+.rebar
+logs
+_build
+.idea
+*.iml
+rebar3.crashdump
+*~

LICENSE

@@ -0,0 +1,191 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+      any Contribution intentionally submitted for inclusion in the Work
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+
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+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
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+   END OF TERMS AND CONDITIONS
+
+   Copyright 2019, Maciej Szlosarczyk <maciej@sosek.net>.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
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+
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+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+

README.md

@@ -0,0 +1,9 @@
+epp_proxy
+=====
+
+An OTP application
+
+Build
+-----
+
+    $ rebar3 compile

apps/epp_proxy/src/epp_proxy.app.src

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+{application, epp_proxy,
+ [{description, "An OTP application"},
+  {vsn, "0.1.0"},
+  {registered, []},
+  {mod, {epp_proxy_app, []}},
+  {applications,
+   [kernel,
+    stdlib
+   ]},
+  {env,[]},
+  {modules, []},
+
+  {licenses, ["Apache 2.0"]},
+  {links, []}
+ ]}.

apps/epp_proxy/src/epp_proxy_app.erl

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+%%%-------------------------------------------------------------------
+%% @doc epp_proxy public API
+%% @end
+%%%-------------------------------------------------------------------
+
+-module(epp_proxy_app).
+
+-behaviour(application).
+
+%% Application callbacks
+-export([start/2, stop/1]).
+
+%%====================================================================
+%% API
+%%====================================================================
+
+start(_StartType, _StartArgs) ->
+    epp_proxy_sup:start_link().
+
+%%--------------------------------------------------------------------
+stop(_State) ->
+    ok.
+
+%%====================================================================
+%% Internal functions
+%%====================================================================

apps/epp_proxy/src/epp_proxy_sup.erl

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+%%%-------------------------------------------------------------------
+%% @doc epp_proxy top level supervisor.
+%% @end
+%%%-------------------------------------------------------------------
+
+-module(epp_proxy_sup).
+
+-behaviour(supervisor).
+
+%% API
+-export([start_link/0]).
+
+%% Supervisor callbacks
+-export([init/1]).
+
+-define(SERVER, ?MODULE).
+
+%%====================================================================
+%% API functions
+%%====================================================================
+
+start_link() ->
+    supervisor:start_link(epp_proxy_sup, []).
+
+%%====================================================================
+%% Supervisor callbacks
+%%====================================================================
+
+%% Child :: #{id => Id, start => {M, F, A}}
+%% Optional keys are restart, shutdown, type, modules.
+%% Before OTP 18 tuples must be used to specify a child. e.g.
+%% Child :: {Id,StartFunc,Restart,Shutdown,Type,Modules}
+init(_Args) ->
+    SupFlags = #{strategy => one_for_one, intensity => 1, period => 5},
+    ChildSpecs = [#{id => tls_server,
+                    start => {epp_tls, start_link, [4444]}}
+                  #{id => tcp_server,
+                    start => {epp_tcp, start_link, [3333]}}],
+    {ok, {SupFlags, ChildSpecs}}.
+
+%%====================================================================
+%% Internal functions
+%%====================================================================

apps/epp_proxy/src/epp_tcp.erl

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+-module(epp_tcp).
+
+-behaviour(supervisor).
+
+-export([start_link/1, init/1]).
+
+-export([serve/1]).
+
+start_link(Port) ->
+    supervisor:start_link({local, ?MODULE}, ?MODULE, Port).
+
+init(Port) ->
+    SupFlags = #{strategy => one_for_one, intensity => 1, period => 5},
+    ChildSpecs = [],
+    accept(Port),
+    log_message(Port),
+    {ok, {SupFlags, ChildSpecs}}.
+
+accept(Port) ->
+    Options = [binary,
+               {packet, raw},
+               {active, false},
+               {reuseaddr, true}],
+
+    {ok, ListenSocket} = gen_tcp:listen(Port, Options),
+    loop_acceptor(ListenSocket).
+
+loop_acceptor(ListenSocket) ->
+    {ok, Client} = gen_tcp:accept(ListenSocket),
+    Pid = spawn_link(?MODULE, serve, [Client]),
+    logger:info("PID: ~p", [Pid]),
+    ok = gen_tcp:controlling_process(Client, Pid),
+    loop_acceptor(ListenSocket).
+
+serve(Client) ->
+    logger:info("Client name ~s", [Client]),
+    send_greeting(Client),
+    read_length(Client),
+    exit(shutdown).
+
+send_greeting(Client) ->
+    Greeting = "Foo bar baz",
+    Length = string:length(Greeting) + 4,
+    ByteSize = << Length:32/big >>,
+    write_line(ByteSize, Client),
+    write_line(Greeting, Client).
+
+write_line(Line, Client) ->
+    gen_tcp:send(Client, Line).
+
+read_length(Client) ->
+    case gen_tcp:recv(Client, 4) of
+        {ok, Data} -> logger:info("Received bytes: ~p", [Data]);
+        {error, Error} -> logger:info("Received bytes: ~p", [Error])
+        end.
+
+log_message(Port) ->
+    logger:info("TCP listening on Port: ~p", [Port]).

apps/epp_proxy/src/epp_tls.erl

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+-module(epp_tls).
+
+-behaviour(supervisor).
+-export([start_link/1, init/1, serve/1]).
+
+start_link(Port) ->
+    supervisor:start_link({local, ?MODULE}, ?MODULE, Port).
+
+init(Port) ->
+    SupFlags = #{strategy => one_for_one, intensity => 1, period => 5},
+    ChildSpecs = [],
+    accept(Port),
+    log_message(Port),
+    {ok, {SupFlags, ChildSpecs}}.
+
+accept(Port) ->
+    Options = [binary,
+               {packet, raw},
+               {active, false},
+               {reuseaddr, true},
+               {verify, verify_peer},
+               {depth, 1},
+               {cacertfile, "/Users/maciej/Development/internetee/docker-images/shared/ca/certs/ca.crt.pem"},
+               {certfile, "/Users/maciej/Development/internetee/docker-images/shared/ca/certs/apache.crt"},
+               {keyfile, "/Users/maciej/Development/internetee/docker-images/shared/ca/private/apache.key"}],
+
+    {ok, ListenSocket} = ssl:listen(Port, Options),
+    loop_acceptor(ListenSocket).
+
+loop_acceptor(ListenSocket) ->
+    {ok, Client} = ssl:transport_accept(ListenSocket),
+    Pid = spawn_link(?MODULE, serve, [Client]),
+    logger:info("PID: ~p", [Pid]),
+    ok = ssl:controlling_process(Client, Pid),
+    loop_acceptor(ListenSocket).
+
+serve(Client) ->
+    {ok, TSocket} = ssl:handshake(Client),
+    {ok, ClientCert} = ssl:peername(TSocket),
+    logger:info("Client name ~s", [ClientCert]),
+    timer:sleep(1000),
+    exit(shutdown).
+
+log_message(Port) ->
+    logger:info("SSL Listening on Port: ~p", [Port]).

apps/epp_proxy/src/epp_xml.erl

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+-module(epp_xml).
+
+-export([find_cltrid/1, parse/1]).
+
+-include_lib("xmerl/include/xmerl.hrl").
+
+%% xml_erl expects a list of characters, so let's give it to it.
+%% Otherwise return an error tuple.
+parse(Text) when is_list(Text) -> parse_list(Text);
+parse(Text) when is_binary(Text) ->
+    List = binary_to_list(Text),
+    parse_list(List);
+parse(_) -> {error, {fatal, {expected_binary_or_list}}}.
+
+%% Parse a record that came from the wire and return a xmlElement record.
+parse_list(List) when is_list(List) ->
+    try xmerl_scan:string(List, [{quiet, 'true'}]) of
+        {Record, []} when is_record(Record, xmlElement) -> {ok, Record}
+    catch
+        exit:X -> {error, X}
+    end.
+
+%% The idea is that even when XML command is invalid,
+%% we should recover cltrid from it, hence the regex use.
+-spec find_cltrid(any()) -> binary() | nomatch.
+find_cltrid(Text) when is_list(Text) -> run_regex(Text);
+find_cltrid(Text) when is_binary(Text) -> run_regex(Text);
+find_cltrid(_) -> nomatch.
+
+run_regex(Text) ->
+    {ok, MP} = re:compile("<clTRID>(?<cltrid>.+)<\/clTRID>"),
+    case re:run(Text, MP, [{capture, ["cltrid"], binary}]) of
+        {match, [Binary]} -> Binary;
+        nomatch -> nomatch
+        end.

apps/epp_proxy/test/epp_xml_tests.erl

@@ -0,0 +1,60 @@
+-module(epp_xml_tests).
+
+-include_lib("eunit/include/eunit.hrl").
+%% This is required for parse tests.
+-include_lib("xmerl/include/xmerl.hrl").
+
+-define(sampleCommandList,
+        "<epp>
+           <command>
+             <login>
+               <clID>test</clID>
+               <pw>test</pw>
+             </login>
+             <clTRID>sample1trid</clTRID>
+           </command>
+         </epp>").
+
+%% parse
+parse_not_a_list_or_binary_test() ->
+    Input = 1234,
+    ExpectedOutput = {error, {fatal, {expected_binary_or_list}}},
+    ?assertEqual(ExpectedOutput, epp_xml:parse(Input)).
+
+parse_sample_valid_xml_list_test() ->
+    Input = ?sampleCommandList,
+    {ok, Record} = epp_xml:parse(Input),
+    ?assert(is_record(Record, xmlElement)).
+
+parse_sample_valid_xml_binary_test() ->
+    Input = list_to_binary(?sampleCommandList),
+    {ok, Record} = epp_xml:parse(Input),
+    ?assert(is_record(Record, xmlElement)).
+
+parse_sample_invalid_xml_list_test() ->
+    Input = "Some text",
+    {error, Error} = epp_xml:parse(Input).
+
+parse_sample_invalid_xml_binary_test() ->
+    Input = list_to_binary("Some text"),
+    {error, Error} = epp_xml:parse(Input).
+
+%% find_cltrid
+find_cltrid_empty_list_test() ->
+    Input = "",
+    ?assertEqual(nomatch, epp_xml:find_cltrid(Input)).
+
+find_cltrid_list_test() ->
+    Input = list_to_binary(?sampleCommandList),
+    ?assertEqual(<<"sample1trid">>, epp_xml:find_cltrid(Input)).
+
+find_cltrid_empty_binary_test() ->
+    Input = <<"">>,
+    ?assertEqual(nomatch, epp_xml:find_cltrid(Input)).
+
+find_cltrid_binary_test() ->
+    Input = ?sampleCommandList,
+    ?assertEqual(<<"sample1trid">>, epp_xml:find_cltrid(Input)).
+
+
+%% get_command

config/sys.config

@@ -0,0 +1,3 @@
+[
+  {epp_proxy, []}
+].

config/vm.args

@@ -0,0 +1,6 @@
+-sname epp_proxy
+
+-setcookie epp_proxy_cookie
+
++K true
++A30

rebar.config

@@ -0,0 +1,20 @@
+{erl_opts, [debug_info]}.
+{deps, []}.
+
+{relx, [{release, {epp_proxy, "0.1.0"},
+         [epp_proxy,
+          sasl]},
+
+        {sys_config, "./config/sys.config"},
+        {vm_args, "./config/vm.args"},
+
+        {dev_mode, true},
+        {include_erts, false},
+
+        {extended_start_script, true}]
+}.
+
+{profiles, [{prod, [{relx, [{dev_mode, false},
+                            {include_erts, true}]}]
+            }]
+}.

rebar.lock

@@ -0,0 +1 @@
+[].