%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2015-2015. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% 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.
%%
%% %CopyrightEnd%
%----------------------------------------------------------------------
%% Purpose: CRL handling
%%----------------------------------------------------------------------
-module(ssl_crl).
-include("ssl_alert.hrl").
-include("ssl_internal.hrl").
-include_lib("public_key/include/public_key.hrl").
-export([trusted_cert_and_path/3]).
trusted_cert_and_path(CRL, {SerialNumber, Issuer},{Db, DbRef} = DbHandle) ->
case ssl_pkix_db:lookup_trusted_cert(Db, DbRef, SerialNumber, Issuer) of
undefined ->
trusted_cert_and_path(CRL, issuer_not_found, DbHandle);
{ok, {_, OtpCert}} ->
{ok, Root, Chain} = ssl_certificate:certificate_chain(OtpCert, Db, DbRef),
{ok, Root, lists:reverse(Chain)}
end;
trusted_cert_and_path(CRL, issuer_not_found, {Db, DbRef} = DbHandle) ->
try find_issuer(CRL, DbHandle) of
OtpCert ->
{ok, Root, Chain} = ssl_certificate:certificate_chain(OtpCert, Db, DbRef),
{ok, Root, lists:reverse(Chain)}
catch
throw:_ ->
{error, issuer_not_found}
end.
find_issuer(CRL, {Db,_}) ->
Issuer = public_key:pkix_normalize_name(public_key:pkix_crl_issuer(CRL)),
IsIssuerFun =
fun({_Key, {_Der,ErlCertCandidate}}, Acc) ->
verify_crl_issuer(CRL, ErlCertCandidate, Issuer, Acc);
(_, Acc) ->
Acc
end,
try ssl_pkix_db:foldl(IsIssuerFun, issuer_not_found, Db) of
issuer_not_found ->
{error, issuer_not_found}
catch
{ok, IssuerCert} ->
IssuerCert
end.
verify_crl_issuer(CRL, ErlCertCandidate, Issuer, NotIssuer) ->
TBSCert = ErlCertCandidate#'OTPCertificate'.tbsCertificate,
case public_key:pkix_normalize_name(TBSCert#'OTPTBSCertificate'.subject) of
Issuer ->
case public_key:pkix_crl_verify(CRL, ErlCertCandidate) of
true ->
throw({ok, ErlCertCandidate});
false ->
NotIssuer;
_ ->
NotIssuer
end;
_ ->
NotIssuer
end.
