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mirror of https://github.com/processone/ejabberd.git synced 2024-11-20 16:15:59 +01:00
xmpp.chapril.org-ejabberd/src/ejabberd_acme.erl
Badlop 5a34020d23 WebAdmin: Move content to commands; new pages; hook changes; new commands
Also:
- Added support to view user subpages in the menu
- Webadmin hooks now get the full request
- New commands added to be used in webadmin pages
2024-06-19 17:59:38 +02:00

683 lines
23 KiB
Erlang

%%%----------------------------------------------------------------------
%%% ejabberd, Copyright (C) 2002-2024 ProcessOne
%%%
%%% This program is free software; you can redistribute it and/or
%%% modify it under the terms of the GNU General Public License as
%%% published by the Free Software Foundation; either version 2 of the
%%% License, or (at your option) any later version.
%%%
%%% This program is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
%%% General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License along
%%% with this program; if not, write to the Free Software Foundation, Inc.,
%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
%%%
%%%----------------------------------------------------------------------
-module(ejabberd_acme).
-behaviour(gen_server).
%% API
-export([start_link/0]).
-export([default_directory_url/0]).
%% HTTP API
-export([process/2]).
%% Hooks
-export([ejabberd_started/0, register_certfiles/0, cert_expired/2]).
%% ejabberd commands
-export([get_commands_spec/0, request_certificate/1,
revoke_certificate/1, list_certificates/0]).
%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
%% WebAdmin
-export([webadmin_menu_node/3, webadmin_page_node/3]).
-include("logger.hrl").
-include("ejabberd_commands.hrl").
-include("ejabberd_http.hrl").
-include("ejabberd_web_admin.hrl").
-include_lib("public_key/include/public_key.hrl").
-include_lib("stdlib/include/ms_transform.hrl").
-include_lib("xmpp/include/xmpp.hrl").
-define(CALL_TIMEOUT, timer:minutes(10)).
-record(state, {}).
-type state() :: #state{}.
-type priv_key() :: public_key:private_key().
-type cert() :: #'OTPCertificate'{}.
-type cert_type() :: ec | rsa.
-type io_error() :: file:posix().
-type issue_result() :: ok | p1_acme:issue_return() |
{error, {file, io_error()} |
{idna_failed, binary()}}.
%%%===================================================================
%%% API
%%%===================================================================
start_link() ->
gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
-spec register_certfiles() -> ok.
register_certfiles() ->
lists:foreach(fun ejabberd_pkix:add_certfile/1,
list_certfiles()).
-spec process([binary()], _) -> {integer(), [{binary(), binary()}], binary()}.
process([Token], _) ->
?DEBUG("Received ACME challenge request for token: ~ts", [Token]),
try ets:lookup_element(acme_challenge, Token, 2) of
Key -> {200, [{<<"Content-Type">>,
<<"application/octet-stream">>}],
Key}
catch _:_ ->
{404, [], <<>>}
end;
process(_, _) ->
{404, [], <<>>}.
-spec cert_expired(_, pkix:cert_info()) -> ok | stop.
cert_expired(_, #{domains := Domains, files := Files}) ->
CertFiles = list_certfiles(),
case lists:any(
fun({File, _}) ->
lists:member(File, CertFiles)
end, Files) of
true ->
gen_server:cast(?MODULE, {request, Domains}),
stop;
false ->
ok
end.
-spec ejabberd_started() -> ok.
ejabberd_started() ->
gen_server:cast(?MODULE, ejabberd_started).
default_directory_url() ->
<<"https://acme-v02.api.letsencrypt.org/directory">>.
%%%===================================================================
%%% gen_server callbacks
%%%===================================================================
init([]) ->
ets:new(acme_challenge, [named_table, public]),
process_flag(trap_exit, true),
ejabberd:start_app(p1_acme),
delete_obsolete_data(),
ejabberd_hooks:add(cert_expired, ?MODULE, cert_expired, 60),
ejabberd_hooks:add(config_reloaded, ?MODULE, register_certfiles, 40),
ejabberd_hooks:add(ejabberd_started, ?MODULE, ejabberd_started, 110),
ejabberd_hooks:add(config_reloaded, ?MODULE, ejabberd_started, 110),
ejabberd_hooks:add(webadmin_menu_node, ?MODULE, webadmin_menu_node, 110),
ejabberd_hooks:add(webadmin_page_node, ?MODULE, webadmin_page_node, 110),
ejabberd_commands:register_commands(get_commands_spec()),
register_certfiles(),
{ok, #state{}}.
handle_call({request, [_|_] = Domains}, _From, State) ->
?INFO_MSG("Requesting new certificate for ~ts from ~ts",
[misc:format_hosts_list(Domains), directory_url()]),
{Ret, State1} = issue_request(State, Domains),
{reply, Ret, State1};
handle_call({revoke, Cert, Key, Path}, _From, State) ->
?INFO_MSG("Revoking certificate from file ~ts", [Path]),
{Ret, State1} = revoke_request(State, Cert, Key, Path),
{reply, Ret, State1};
handle_call(Request, From, State) ->
?WARNING_MSG("Unexpected call from ~p: ~p", [From, Request]),
{noreply, State}.
handle_cast(ejabberd_started, State) ->
case request_on_start() of
{true, Domains} ->
?INFO_MSG("Requesting new certificate for ~ts from ~ts",
[misc:format_hosts_list(Domains), directory_url()]),
{_, State1} = issue_request(State, Domains),
{noreply, State1};
false ->
{noreply, State}
end;
handle_cast({request, [_|_] = Domains}, State) ->
?INFO_MSG("Requesting renewal of certificate for ~ts from ~ts",
[misc:format_hosts_list(Domains), directory_url()]),
{_, State1} = issue_request(State, Domains),
{noreply, State1};
handle_cast(Request, State) ->
?WARNING_MSG("Unexpected cast: ~p", [Request]),
{noreply, State}.
handle_info(Info, State) ->
?WARNING_MSG("Unexpected info: ~p", [Info]),
{noreply, State}.
terminate(_Reason, _State) ->
ejabberd_hooks:delete(cert_expired, ?MODULE, cert_expired, 60),
ejabberd_hooks:delete(config_reloaded, ?MODULE, register_certfiles, 40),
ejabberd_hooks:delete(ejabberd_started, ?MODULE, ejabberd_started, 110),
ejabberd_hooks:delete(config_reloaded, ?MODULE, ejabberd_started, 110),
ejabberd_hooks:delete(webadmin_menu_node, ?MODULE, webadmin_menu_node, 110),
ejabberd_hooks:delete(webadmin_page_node, ?MODULE, webadmin_page_node, 110),
ejabberd_commands:unregister_commands(get_commands_spec()).
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
%%%===================================================================
%%% Internal functions
%%%===================================================================
%%%===================================================================
%%% Challenge callback
%%%===================================================================
-spec register_challenge(p1_acme:challenge_data(), reference()) -> true.
register_challenge(Auth, Ref) ->
?DEBUG("Registering ACME challenge ~p -> ~p", [Ref, Auth]),
ejabberd_hooks:run(acme_challenge, [{start, Auth, Ref}]),
ets:insert(
acme_challenge,
lists:map(
fun(#{token := Token, key := Key}) ->
{Token, Key, Ref}
end, Auth)).
-spec unregister_challenge(reference()) -> non_neg_integer().
unregister_challenge(Ref) ->
?DEBUG("Unregistering ACME challenge ~p", [Ref]),
ejabberd_hooks:run(acme_challenge, [{stop, Ref}]),
ets:select_delete(
acme_challenge,
ets:fun2ms(
fun({_, _, Ref1}) ->
Ref1 == Ref
end)).
%%%===================================================================
%%% Issuance
%%%===================================================================
-spec issue_request(state(), [binary(),...]) -> {issue_result(), state()}.
issue_request(State, Domains) ->
case check_idna(Domains) of
{ok, AsciiDomains} ->
case read_account_key() of
{ok, AccKey} ->
Config = ejabberd_option:acme(),
DirURL = maps:get(ca_url, Config, default_directory_url()),
Contact = maps:get(contact, Config, []),
CertType = maps:get(cert_type, Config, rsa),
issue_request(State, DirURL, Domains, AsciiDomains, AccKey, CertType, Contact);
{error, Reason} = Err ->
?ERROR_MSG("Failed to request certificate for ~ts: ~ts",
[misc:format_hosts_list(Domains),
format_error(Reason)]),
{Err, State}
end;
{error, Reason} = Err ->
?ERROR_MSG("Failed to request certificate for ~ts: ~ts",
[misc:format_hosts_list(Domains),
format_error(Reason)]),
{Err, State}
end.
-spec issue_request(state(), binary(), [binary(),...], [string(), ...], priv_key(),
cert_type(), [binary()]) -> {issue_result(), state()}.
issue_request(State, DirURL, Domains, AsciiDomains, AccKey, CertType, Contact) ->
Ref = make_ref(),
ChallengeFun = fun(Auth) -> register_challenge(Auth, Ref) end,
Ret = case p1_acme:issue(DirURL, AsciiDomains, AccKey,
[{cert_type, CertType},
{contact, Contact},
{debug_fun, debug_fun()},
{challenge_fun, ChallengeFun}]) of
{ok, #{cert_key := CertKey,
cert_chain := Certs}} ->
case store_cert(CertKey, Certs, CertType, Domains) of
{ok, Path} ->
ejabberd_pkix:add_certfile(Path),
ejabberd_pkix:commit(),
?INFO_MSG("Certificate for ~ts has been received, "
"stored and loaded successfully",
[misc:format_hosts_list(Domains)]),
{ok, State};
{error, Reason} = Err ->
?ERROR_MSG("Failed to store certificate for ~ts: ~ts",
[misc:format_hosts_list(Domains),
format_error(Reason)]),
{Err, State}
end;
{error, Reason} = Err ->
?ERROR_MSG("Failed to request certificate for ~ts: ~ts",
[misc:format_hosts_list(Domains),
format_error(Reason)]),
{Err, State}
end,
unregister_challenge(Ref),
Ret.
%%%===================================================================
%%% Revocation
%%%===================================================================
revoke_request(State, Cert, Key, Path) ->
case p1_acme:revoke(directory_url(), Cert, Key,
[{debug_fun, debug_fun()}]) of
ok ->
?INFO_MSG("Certificate from file ~ts has been "
"revoked successfully", [Path]),
case delete_file(Path) of
ok ->
ejabberd_pkix:del_certfile(Path),
ejabberd_pkix:commit(),
{ok, State};
Err ->
{Err, State}
end;
{error, Reason} = Err ->
?ERROR_MSG("Failed to revoke certificate from file ~ts: ~ts",
[Path, format_error(Reason)]),
{Err, State}
end.
%%%===================================================================
%%% File management
%%%===================================================================
-spec acme_dir() -> file:filename_all().
acme_dir() ->
MnesiaDir = mnesia:system_info(directory),
filename:join(MnesiaDir, "acme").
-spec acme_certs_dir(atom()) -> file:filename_all().
acme_certs_dir(Tag) ->
filename:join(acme_dir(), Tag).
-spec account_file() -> file:filename_all().
account_file() ->
filename:join(acme_dir(), "account.key").
-spec cert_file(cert_type(), [binary()]) -> file:filename_all().
cert_file(CertType, Domains) ->
L = [erlang:atom_to_binary(CertType, latin1)|Domains],
Hash = str:sha(str:join(L, <<0>>)),
filename:join(acme_certs_dir(live), Hash).
-spec prep_path(file:filename_all()) -> binary().
prep_path(Path) ->
unicode:characters_to_binary(Path).
-spec list_certfiles() -> [binary()].
list_certfiles() ->
filelib:fold_files(
acme_certs_dir(live), "^[0-9a-f]{40}$", false,
fun(F, Fs) -> [prep_path(F)|Fs] end, []).
-spec read_account_key() -> {ok, #'ECPrivateKey'{}} | {error, {file, io_error()}}.
read_account_key() ->
Path = account_file(),
case pkix:read_file(Path) of
{ok, _, KeyMap} ->
case maps:keys(KeyMap) of
[#'ECPrivateKey'{} = Key|_] -> {ok, Key};
_ ->
?WARNING_MSG("File ~ts doesn't contain ACME account key. "
"Trying to create a new one...",
[Path]),
create_account_key()
end;
{error, enoent} ->
create_account_key();
{error, {bad_cert, _, _} = Reason} ->
?WARNING_MSG("ACME account key from '~ts' is corrupted: ~ts. "
"Trying to create a new one...",
[Path, pkix:format_error(Reason)]),
create_account_key();
{error, Reason} ->
?ERROR_MSG("Failed to read ACME account from ~ts: ~ts. "
"Try to fix permissions or delete the file completely",
[Path, pkix:format_error(Reason)]),
{error, {file, Reason}}
end.
-spec create_account_key() -> {ok, #'ECPrivateKey'{}} | {error, {file, io_error()}}.
create_account_key() ->
Path = account_file(),
?DEBUG("Creating ACME account key in ~ts", [Path]),
Key = p1_acme:generate_key(ec),
DER = public_key:der_encode(element(1, Key), Key),
PEM = public_key:pem_encode([{element(1, Key), DER, not_encrypted}]),
case write_file(Path, PEM) of
ok ->
?DEBUG("ACME account key has been created successfully in ~ts",
[Path]),
{ok, Key};
{error, Reason} ->
{error, {file, Reason}}
end.
-spec store_cert(priv_key(), [cert()], cert_type(), [binary()]) -> {ok, file:filename_all()} |
{error, {file, io_error()}}.
store_cert(Key, Chain, CertType, Domains) ->
DerKey = public_key:der_encode(element(1, Key), Key),
PemKey = [{element(1, Key), DerKey, not_encrypted}],
PemChain = lists:map(
fun(Cert) ->
DerCert = public_key:pkix_encode(
element(1, Cert), Cert, otp),
{'Certificate', DerCert, not_encrypted}
end, Chain),
PEM = public_key:pem_encode(PemChain ++ PemKey),
Path = cert_file(CertType, Domains),
?DEBUG("Storing certificate for ~ts in ~ts",
[misc:format_hosts_list(Domains), Path]),
case write_file(Path, PEM) of
ok ->
{ok, Path};
{error, Reason} ->
{error, {file, Reason}}
end.
-spec read_cert(file:filename_all()) -> {ok, [cert()], priv_key()} |
{error, {file, io_error()} |
{bad_cert, _, _} |
unexpected_certfile}.
read_cert(Path) ->
?DEBUG("Reading certificate from ~ts", [Path]),
case pkix:read_file(Path) of
{ok, CertsMap, KeysMap} ->
case {maps:to_list(CertsMap), maps:keys(KeysMap)} of
{[_|_] = Certs, [CertKey]} ->
{ok, [Cert || {Cert, _} <- lists:keysort(2, Certs)], CertKey};
_ ->
{error, unexpected_certfile}
end;
{error, Why} when is_atom(Why) ->
{error, {file, Why}};
{error, _} = Err ->
Err
end.
-spec write_file(file:filename_all(), iodata()) -> ok | {error, io_error()}.
write_file(Path, Data) ->
case ensure_dir(Path) of
ok ->
case file:write_file(Path, Data) of
ok ->
case file:change_mode(Path, 8#600) of
ok -> ok;
{error, Why} ->
?WARNING_MSG("Failed to change permissions of ~ts: ~ts",
[Path, file:format_error(Why)])
end;
{error, Why} = Err ->
?ERROR_MSG("Failed to write file ~ts: ~ts",
[Path, file:format_error(Why)]),
Err
end;
Err ->
Err
end.
-spec delete_file(file:filename_all()) -> ok | {error, io_error()}.
delete_file(Path) ->
case file:delete(Path) of
ok -> ok;
{error, Why} = Err ->
?WARNING_MSG("Failed to delete file ~ts: ~ts",
[Path, file:format_error(Why)]),
Err
end.
-spec ensure_dir(file:filename_all()) -> ok | {error, io_error()}.
ensure_dir(Path) ->
case filelib:ensure_dir(Path) of
ok -> ok;
{error, Why} = Err ->
?ERROR_MSG("Failed to create directory ~ts: ~ts",
[filename:dirname(Path),
file:format_error(Why)]),
Err
end.
-spec delete_obsolete_data() -> ok.
delete_obsolete_data() ->
Path = filename:join(ejabberd_pkix:certs_dir(), "acme"),
case filelib:is_dir(Path) of
true ->
?INFO_MSG("Deleting obsolete directory ~ts", [Path]),
_ = misc:delete_dir(Path),
ok;
false ->
ok
end.
%%%===================================================================
%%% ejabberd commands
%%%===================================================================
get_commands_spec() ->
[#ejabberd_commands{name = request_certificate, tags = [acme],
desc = "Requests certificates for all or some domains",
longdesc = "Domains can be `all`, or a list of domains separared with comma characters",
module = ?MODULE, function = request_certificate,
args_desc = ["Domains for which to acquire a certificate"],
args_example = ["example.com,domain.tld,conference.domain.tld"],
args = [{domains, string}],
result = {res, restuple}},
#ejabberd_commands{name = list_certificates, tags = [acme],
desc = "Lists all ACME certificates",
module = ?MODULE, function = list_certificates,
args = [],
result = {certificates,
{list, {certificate,
{tuple, [{domain, string},
{file, string},
{used, string}]}}}}},
#ejabberd_commands{name = revoke_certificate, tags = [acme],
desc = "Revokes the selected ACME certificate",
module = ?MODULE, function = revoke_certificate,
args_desc = ["Filename of the certificate"],
args = [{file, string}],
result = {res, restuple}}].
-spec request_certificate(iodata()) -> {ok | error, string()}.
request_certificate(Arg) ->
Ret = case lists:filter(
fun(S) -> S /= <<>> end,
re:split(Arg, "[\\h,;]+", [{return, binary}])) of
[<<"all">>] ->
case auto_domains() of
[] -> {error, no_auto_hosts};
Domains ->
gen_server:call(?MODULE, {request, Domains}, ?CALL_TIMEOUT)
end;
[_|_] = Domains ->
case lists:dropwhile(
fun(D) ->
try ejabberd_router:is_my_route(D) of
true -> not is_ip_or_localhost(D);
false -> false
catch _:{invalid_domain, _} -> false
end
end, Domains) of
[Bad|_] ->
{error, {invalid_host, Bad}};
[] ->
gen_server:call(?MODULE, {request, Domains}, ?CALL_TIMEOUT)
end;
[] ->
{error, invalid_argument}
end,
case Ret of
ok -> {ok, ""};
{error, Why} -> {error, format_error(Why)}
end.
-spec revoke_certificate(iodata()) -> {ok | error, string()}.
revoke_certificate(Path0) ->
Path = prep_path(Path0),
Ret = case read_cert(Path) of
{ok, [Cert|_], Key} ->
gen_server:call(?MODULE, {revoke, Cert, Key, Path}, ?CALL_TIMEOUT);
{error, _} = Err ->
Err
end,
case Ret of
ok -> {ok, ""};
{error, Reason} -> {error, format_error(Reason)}
end.
-spec list_certificates() -> [{binary(), binary(), boolean()}].
list_certificates() ->
Known = lists:flatmap(
fun(Path) ->
try
{ok, [Cert|_], _} = read_cert(Path),
Domains = pkix:extract_domains(Cert),
[{Domain, Path} || Domain <- Domains]
catch _:{badmatch, _} ->
[]
end
end, list_certfiles()),
Used = lists:foldl(
fun(Domain, S) ->
try
{ok, Path} = ejabberd_pkix:get_certfile_no_default(Domain),
{ok, [Cert|_], _} = read_cert(Path),
{ok, #{files := Files}} = pkix:get_cert_info(Cert),
lists:foldl(fun sets:add_element/2,
S, [{Domain, File} || {File, _} <- Files])
catch _:{badmatch, _} ->
S
end
end, sets:new(), all_domains()),
lists:sort(
lists:map(
fun({Domain, Path} = E) ->
{Domain, Path, sets:is_element(E, Used)}
end, Known)).
%%%===================================================================
%%% WebAdmin
%%%===================================================================
webadmin_menu_node(Acc, _Node, _Lang) ->
Acc ++ [{<<"acme">>, <<"ACME">>}].
webadmin_page_node(_, Node, #request{path = [<<"acme">>]} = R) ->
Head = ?H1GLraw(<<"ACME Certificates">>, <<"admin/configuration/basic/#acme">>, <<"ACME">>),
Set = [ejabberd_cluster:call(Node, ejabberd_web_admin, make_command, [request_certificate, R]),
ejabberd_cluster:call(Node, ejabberd_web_admin, make_command, [revoke_certificate, R])],
Get = [ejabberd_cluster:call(Node, ejabberd_web_admin, make_command, [list_certificates, R])],
{stop, Head ++ Get ++ Set};
webadmin_page_node(Acc, _, _) -> Acc.
%%%===================================================================
%%% Other stuff
%%%===================================================================
-spec all_domains() -> [binary(),...].
all_domains() ->
ejabberd_option:hosts() ++ ejabberd_router:get_all_routes().
-spec auto_domains() -> [binary()].
auto_domains() ->
lists:filter(
fun(Host) ->
not is_ip_or_localhost(Host)
end, all_domains()).
-spec directory_url() -> binary().
directory_url() ->
maps:get(ca_url, ejabberd_option:acme(), default_directory_url()).
-spec debug_fun() -> fun((string(), list()) -> ok).
debug_fun() ->
fun(Fmt, Args) -> ?DEBUG(Fmt, Args) end.
-spec request_on_start() -> false | {true, [binary()]}.
request_on_start() ->
Config = ejabberd_option:acme(),
case maps:get(auto, Config, true) of
false -> false;
true ->
case ejabberd_listener:tls_listeners() of
[] -> false;
_ ->
case lists:filter(
fun(Host) ->
not (have_cert_for_domain(Host)
orelse is_ip_or_localhost(Host))
end, auto_domains()) of
[] -> false;
Hosts ->
case have_acme_listener() of
true -> {true, Hosts};
false ->
?WARNING_MSG(
"No HTTP listeners for ACME challenges "
"are configured, automatic "
"certificate requests are aborted. Hint: "
"configure the listener and restart/reload "
"ejabberd. Or set acme->auto option to "
"`false` to suppress this warning.",
[]),
false
end
end
end
end.
well_known() ->
[<<".well-known">>, <<"acme-challenge">>].
-spec have_cert_for_domain(binary()) -> boolean().
have_cert_for_domain(Host) ->
ejabberd_pkix:get_certfile_no_default(Host) /= error.
-spec is_ip_or_localhost(binary()) -> boolean().
is_ip_or_localhost(Host) ->
Parts = binary:split(Host, <<".">>),
TLD = binary_to_list(lists:last(Parts)),
case inet:parse_address(TLD) of
{ok, _} -> true;
_ -> TLD == "localhost"
end.
-spec have_acme_listener() -> boolean().
have_acme_listener() ->
lists:any(
fun({_, ejabberd_http, #{tls := false,
request_handlers := Handlers}}) ->
lists:keymember(well_known(), 1, Handlers);
(_) ->
false
end, ejabberd_option:listen()).
-spec check_idna([binary()]) -> {ok, [string()]} | {error, {idna_failed, binary()}}.
check_idna(Domains) ->
lists:foldl(
fun(D, {ok, Ds}) ->
try {ok, [idna:utf8_to_ascii(D)|Ds]}
catch _:_ -> {error, {idna_failed, D}}
end;
(_, Err) ->
Err
end, {ok, []}, Domains).
-spec format_error(term()) -> string().
format_error({file, Reason}) ->
"I/O error: " ++ file:format_error(Reason);
format_error({invalid_host, Domain}) ->
"Unknown or unacceptable virtual host: " ++ binary_to_list(Domain);
format_error(no_auto_hosts) ->
"You have no virtual hosts acceptable for ACME certification";
format_error(invalid_argument) ->
"Invalid argument";
format_error(unexpected_certfile) ->
"The certificate file was not obtained using ACME";
format_error({idna_failed, Domain}) ->
"Not an IDN hostname: " ++ binary_to_list(Domain);
format_error({bad_cert, _, _} = Reason) ->
"Malformed certificate file: " ++ pkix:format_error(Reason);
format_error(Reason) ->
p1_acme:format_error(Reason).