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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2007-2020. All Rights Reserved.
%%
%% 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
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% 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.
%%
%% %CopyrightEnd%
%%
%%
-module(ssl_config).
-include("ssl_internal.hrl").
-include("ssl_connection.hrl").
-include_lib("public_key/include/public_key.hrl").
-define(DEFAULT_MAX_SESSION_CACHE, 1000).
-export([init/2,
pre_1_3_session_opts/1,
get_max_early_data_size/0,
get_ticket_lifetime/0,
get_ticket_store_size/0,
get_internal_active_n/0,
get_internal_active_n/1
]).
%%====================================================================
%% Internal application API
%%====================================================================
init(#{erl_dist := ErlDist,
key := Key,
keyfile := KeyFile,
password := Password,
dh := DH,
dhfile := DHFile} = SslOpts, Role) ->
init_manager_name(ErlDist),
{ok, #{pem_cache := PemCache} = Config}
= init_certificates(SslOpts, Role),
PrivateKey =
init_private_key(PemCache, Key, KeyFile, Password, Role),
DHParams = init_diffie_hellman(PemCache, DH, DHFile, Role),
{ok, Config#{private_key => PrivateKey, dh_params => DHParams}}.
pre_1_3_session_opts(Role) ->
{Cb, InitArgs} = session_cb_opts(Role),
CbOpts = #{session_cb => Cb,
session_cb_init_args => InitArgs},
LifeTime = session_lifetime(Role),
Max = max_session_cache_size(Role),
CbOpts#{lifetime => LifeTime, max => Max}.
get_ticket_lifetime() ->
case application:get_env(ssl, server_session_ticket_lifetime) of
{ok, Seconds} when is_integer(Seconds) andalso
Seconds =< 604800 -> %% MUST be less than 7 days
Seconds;
_ ->
7200 %% Default 2 hours
end.
get_ticket_store_size() ->
case application:get_env(ssl, server_session_ticket_store_size) of
{ok, Size} when is_integer(Size) ->
Size;
_ ->
1000
end.
get_max_early_data_size() ->
case application:get_env(ssl, server_session_ticket_max_early_data) of
{ok, Size} when is_integer(Size) ->
Size;
_ ->
?DEFAULT_MAX_EARLY_DATA_SIZE
end.
get_internal_active_n() ->
get_internal_active_n(false).
get_internal_active_n(true) ->
%% Start with a random number between 1 and ?INTERNAL_ACTIVE_N
%% In most cases distribution connections are established all at
%% the same time, and flow control engages with ?INTERNAL_ACTIVE_N for
%% all connections. Which creates a wave of "passive" messages, leading
%% to significant bump of memory & scheduler utilisation. Starting with
%% a random number between 1 and ?INTERNAL_ACTIVE_N helps to spread the
%% spike.
erlang:system_time() rem ?INTERNAL_ACTIVE_N + 1;
get_internal_active_n(false) ->
case application:get_env(ssl, internal_active_n) of
{ok, N} when is_integer(N) ->
N;
_ ->
?INTERNAL_ACTIVE_N
end.
%%====================================================================
%% Internal functions
%%====================================================================
init_manager_name(false) ->
put(ssl_manager, ssl_manager:name(normal)),
put(ssl_pem_cache, ssl_pem_cache:name(normal));
init_manager_name(true) ->
put(ssl_manager, ssl_manager:name(dist)),
put(ssl_pem_cache, ssl_pem_cache:name(dist)).
init_certificates(#{cacerts := CaCerts,
cacertfile := CACertFile,
certfile := CertFile,
cert := OwnCerts,
crl_cache := CRLCache
}, Role) ->
{ok, Config} =
try
Certs = case CaCerts of
undefined ->
CACertFile;
_ ->
{der, CaCerts}
end,
{ok,_} = ssl_manager:connection_init(Certs, Role, CRLCache)
catch
_:Reason ->
file_error(CACertFile, {cacertfile, Reason})
end,
init_certificates(OwnCerts, Config, CertFile, Role).
init_certificates(undefined, Config, <<>>, _) ->
{ok, Config#{own_certificates => undefined}};
init_certificates(undefined, #{pem_cache := PemCache} = Config, CertFile, client) ->
try
%% OwnCert | [OwnCert | Chain]
OwnCerts = ssl_certificate:file_to_certificats(CertFile, PemCache),
{ok, Config#{own_certificates => OwnCerts}}
catch _Error:_Reason ->
{ok, Config#{own_certificates => undefined}}
end;
init_certificates(undefined, #{pem_cache := PemCache} = Config, CertFile, server) ->
try
%% OwnCert | [OwnCert | Chain]
OwnCerts = ssl_certificate:file_to_certificats(CertFile, PemCache),
{ok, Config#{own_certificates => OwnCerts}}
catch
_:Reason ->
file_error(CertFile, {certfile, Reason})
end;
init_certificates(OwnCerts, Config, _, _) ->
{ok, Config#{own_certificates => OwnCerts}}.
init_private_key(_, #{algorithm := Alg} = Key, _, _Password, _Client) when Alg == ecdsa;
Alg == rsa;
Alg == dss ->
case maps:is_key(engine, Key) andalso maps:is_key(key_id, Key) of
true ->
Key;
false ->
throw({key, {invalid_key_id, Key}})
end;
init_private_key(_, undefined, <<>>, _Password, _Client) ->
undefined;
init_private_key(DbHandle, undefined, KeyFile, Password, _) ->
try
{ok, List} = ssl_manager:cache_pem_file(KeyFile, DbHandle),
[PemEntry] = [PemEntry || PemEntry = {PKey, _ , _} <- List,
PKey =:= 'RSAPrivateKey' orelse
PKey =:= 'DSAPrivateKey' orelse
PKey =:= 'ECPrivateKey' orelse
PKey =:= 'PrivateKeyInfo'
],
private_key(public_key:pem_entry_decode(PemEntry, Password))
catch
_:Reason ->
file_error(KeyFile, {keyfile, Reason})
end;
init_private_key(_,{Asn1Type, PrivateKey},_,_,_) ->
private_key(init_private_key(Asn1Type, PrivateKey)).
init_private_key(Asn1Type, PrivateKey) ->
public_key:der_decode(Asn1Type, PrivateKey).
private_key(#'PrivateKeyInfo'{privateKeyAlgorithm =
#'PrivateKeyInfo_privateKeyAlgorithm'{algorithm = ?'rsaEncryption'},
privateKey = Key}) ->
public_key:der_decode('RSAPrivateKey', iolist_to_binary(Key));
private_key(#'PrivateKeyInfo'{privateKeyAlgorithm =
#'PrivateKeyInfo_privateKeyAlgorithm'{algorithm = ?'id-dsa'},
privateKey = Key}) ->
public_key:der_decode('DSAPrivateKey', iolist_to_binary(Key));
private_key(#'PrivateKeyInfo'{privateKeyAlgorithm =
#'PrivateKeyInfo_privateKeyAlgorithm'{algorithm = ?'id-ecPublicKey',
parameters = {asn1_OPENTYPE, Parameters}},
privateKey = Key}) ->
ECKey = public_key:der_decode('ECPrivateKey', iolist_to_binary(Key)),
ECParameters = public_key:der_decode('EcpkParameters', Parameters),
ECKey#'ECPrivateKey'{parameters = ECParameters};
private_key(Key) ->
Key.
-spec(file_error(_,_) -> no_return()).
file_error(File, Throw) ->
case Throw of
{Opt,{badmatch, {error, {badmatch, Error}}}} ->
throw({options, {Opt, binary_to_list(File), Error}});
{Opt, {badmatch, Error}} ->
throw({options, {Opt, binary_to_list(File), Error}});
_ ->
throw(Throw)
end.
init_diffie_hellman(_,Params, _,_) when is_binary(Params)->
public_key:der_decode('DHParameter', Params);
init_diffie_hellman(_,_,_, client) ->
undefined;
init_diffie_hellman(_,_,undefined, _) ->
?DEFAULT_DIFFIE_HELLMAN_PARAMS;
init_diffie_hellman(DbHandle,_, DHParamFile, server) ->
try
{ok, List} = ssl_manager:cache_pem_file(DHParamFile,DbHandle),
case [Entry || Entry = {'DHParameter', _ , _} <- List] of
[Entry] ->
public_key:pem_entry_decode(Entry);
[] ->
?DEFAULT_DIFFIE_HELLMAN_PARAMS
end
catch
_:Reason ->
file_error(DHParamFile, {dhfile, Reason})
end.
session_cb_init_args(client) ->
case application:get_env(ssl, client_session_cb_init_args) of
undefined ->
case application:get_env(ssl, session_cb_init_args) of
{ok, Args} when is_list(Args) ->
Args;
_ ->
[]
end;
{ok, Args} ->
Args
end;
session_cb_init_args(server) ->
case application:get_env(ssl, server_session_cb_init_args) of
undefined ->
case application:get_env(ssl, session_cb_init_args) of
{ok, Args} when is_list(Args) ->
Args;
_ ->
[]
end;
{ok, Args} ->
Args
end.
session_lifetime(_Role) ->
case application:get_env(ssl, session_lifetime) of
{ok, Time} when is_integer(Time) ->
Time;
_ ->
?'24H_in_sec'
end.
max_session_cache_size(client) ->
case application:get_env(ssl, session_cache_client_max) of
{ok, Size} when is_integer(Size) ->
Size;
_ ->
?DEFAULT_MAX_SESSION_CACHE
end;
max_session_cache_size(server) ->
case application:get_env(ssl, session_cache_server_max) of
{ok, Size} when is_integer(Size) ->
Size;
_ ->
?DEFAULT_MAX_SESSION_CACHE
end.
session_cb_opts(client = Role)->
case application:get_env(ssl, session_cb, ssl_client_session_cache_db) of
ssl_client_session_cache_db = ClientCb ->
{ClientCb, []};
ClientCb ->
{ClientCb, session_cb_init_args(Role)}
end;
session_cb_opts(server = Role) ->
case application:get_env(ssl, session_cb, ssl_server_session_cache_db) of
ssl_server_session_cache_db = ServerCb ->
{ServerCb, []};
ServerCb ->
{ServerCb, session_cb_init_args(Role)}
end.
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