Ssl 使用Erlang在不进行验证的情况下获取客户端证书

我对Erlang比较陌生，希望编写一个使用客户机证书来识别客户机的小型服务器。客户端应该能够使用任何公钥/私钥对，而不必将其作为证书链的一部分。我查看了OTP源代码中的SSL示例，并使用make_certs.erl创建密钥对。我可以使用创建的客户端证书进行连接，但不能使用自签名证书

如何在不进行验证的情况下获取客户端证书

我的示例代码当前为：

-module(simple_server).

-export([start/0]).

keep_alive() ->
    receive
        Any -> io:format("Listening socket: ~p~n",[Any])
    end.


start() ->
    ssl:start(),
    spawn(fun() ->
        start_parallel_server(3333),
        keep_alive()
    end).


start_parallel_server(Port) ->
    case ssl:listen(Port, [
        binary,
        {packet, 0},
        {reuseaddr, true},
        {active, true},
        {certfile,"../etc/server/cert.pem"},
        {keyfile,"../etc/server/key.pem"},
        {cacertfile,"../etc/server/cacerts.pem"},
        {verify,verify_peer},
        {fail_if_no_peer_cert,true}
    ]) of
        {ok,Listen} ->
            spawn(fun() -> par_connect(Listen) end);
        {error,Reason} ->
            io:format("error ~p~n",[Reason])
    end.



par_connect(Listen) ->
    case ssl:transport_accept(Listen) of
        {ok,Socket} ->
            spawn(fun() -> par_connect(Listen) end),
            ssl:ssl_accept(Socket),
            print_cert(Socket),
            get_request(Socket,[]);
        {error,Reason} ->
            io:format("Listening stopped (~p)~n",[Reason])
    end.

print_cert(Socket) ->
    case ssl:peercert(Socket) of
        {ok,Cert} ->
            io:format("Certificate: ~p~n",[Cert]);
        {error,Reason} ->
            io:format("Certificate error ~p~n",[Reason])
    end.


get_request(Socket,L) ->
    receive
        {ssl, Socket, Bin} ->
            io:format("Server received: ~p~n",[Bin]),
            get_request(Socket,L);
        {ssl_closed, Socket} ->
            io:format("Socket did disconnect~n");
        Reason ->
            io:format("Client error: ~p~n",[Reason])
    end.

---

您需要为允许自签名证书的ssl:listen提供自定义路径验证函数

verify\u fun

选项（）允许您指定遇到认证验证错误时调用的函数。 我们可以采用默认实现（在文档中给出），并确保

自签名\u peer

案例返回成功：

{verify_fun, {fun(_, {bad_cert, selfsigned_peer}, UserState) ->
                   {valid, UserState}; %% Allow self-signed certificates

                 (_,{bad_cert, _} = Reason, _) ->
                   {fail, Reason};

                 (_,{extension, _}, UserState) ->
                   {unknown, UserState};

                 (_, valid, UserState) ->
                   {valid, UserState};

                 (_, valid_peer, UserState) ->
                   {valid, UserState}
               end, []}}