%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2007-2017. 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").
-export([init/2]).
init(SslOpts, Role) ->
init_manager_name(SslOpts#ssl_options.erl_dist),
{ok, #{pem_cache := PemCache} = Config}
= init_certificates(SslOpts, Role),
PrivateKey =
init_private_key(PemCache, SslOpts#ssl_options.key, SslOpts#ssl_options.keyfile,
SslOpts#ssl_options.password, Role),
DHParams = init_diffie_hellman(PemCache, SslOpts#ssl_options.dh, SslOpts#ssl_options.dhfile, Role),
{ok, Config#{private_key => PrivateKey, dh_params => DHParams}}.
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(#ssl_options{cacerts = CaCerts,
cacertfile = CACertFile,
certfile = CertFile,
cert = Cert,
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(Cert, Config, CertFile, Role).
init_certificates(undefined, Config, <<>>, _) ->
{ok, Config#{own_certificate => undefined}};
init_certificates(undefined, #{pem_cache := PemCache} = Config, CertFile, client) ->
try
%% Ignoring potential proxy-certificates see:
%% http://dev.globus.org/wiki/Security/ProxyFileFormat
[OwnCert|_] = ssl_certificate:file_to_certificats(CertFile, PemCache),
{ok, Config#{own_certificate => OwnCert}}
catch _Error:_Reason ->
{ok, Config#{own_certificate => undefined}}
end;
init_certificates(undefined, #{pem_cache := PemCache} = Config, CertFile, server) ->
try
[OwnCert|_] = ssl_certificate:file_to_certificats(CertFile, PemCache),
{ok, Config#{own_certificate => OwnCert}}
catch
_:Reason ->
file_error(CertFile, {certfile, Reason})
end;
init_certificates(Cert, Config, _, _) ->
{ok, Config#{own_certificate => Cert}}.
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(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.
