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tls_certificate_check

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CA store + Partial chain handler

Retired package: Security issue - Outdated Certification Authorities
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tls_certificate_check src tls_certificate_check_chain.erl
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src/tls_certificate_check_chain.erl 

%% Copyright (c) 2020-2021 Guilherme Andrade

%%

%% Permission is hereby granted, free of charge, to any person obtaining a

%% copy  of this software and associated documentation files (the "Software"),

%% to deal in the Software without restriction, including without limitation

%% the rights to use, copy, modify, merge, publish, distribute, sublicense,

%% and/or sell copies of the Software, and to permit persons to whom the

%% Software is furnished to do so, subject to the following conditions:

%%

%% The above copyright notice and this permission notice shall be included in

%% all copies or substantial portions of the Software.

%%

%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

%% FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

%% DEALINGS IN THE SOFTWARE.



%% @private

-module(tls_certificate_check_chain).



-include_lib("public_key/include/OTP-PUB-KEY.hrl").



%% ------------------------------------------------------------------

%% API Function Exports

%% ------------------------------------------------------------------



-export(

   [find_authority/1

   ]).



%% ------------------------------------------------------------------

%% API Function Definitions

%% ------------------------------------------------------------------



-spec find_authority([public_key:der_encoded()])

        -> {trusted_ca, public_key:der_encoded()}

           | unknown_ca.

find_authority([EncodedCertificate | NextEncodedCertificates]) ->

    Certificate = public_key:pkix_decode_cert(EncodedCertificate, otp),

    #'OTPCertificate'{tbsCertificate = TbsCertificate} = Certificate,

    #'OTPTBSCertificate'{subjectPublicKeyInfo = PublicKeyInfo} = TbsCertificate,



    case tls_certificate_check_authorities:is_trusted_public_key(PublicKeyInfo) of

        true ->

            {trusted_ca, EncodedCertificate};

        false ->

            find_authority(NextEncodedCertificates)

    end;

find_authority([]) ->

    unknown_ca.