<?php
// Copyright (C) 2015 Remy van Elst

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.

// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.


function check_json($host,$port) {
  $data = [];
  $stream = stream_context_create (array("ssl" => 
    array("capture_peer_cert" => true,
    "capture_peer_cert_chain" => true,
    "verify_peer" => false,
    "verify_peer_name" => false,
    "allow_self_signed" => true,
    "capture_session_meta" => true,
    "sni_enabled" => true)));
  $read_stream = stream_socket_client("ssl://$host:$port", $errno, $errstr, 2, STREAM_CLIENT_CONNECT, $stream);
  if ( $read_stream === false ) {
    $data["error"] = ["Failed to connect: " . htmlspecialchars($errstr)];
    return $data;
  } else {
    $context = stream_context_get_params($read_stream);
    $context_meta = stream_context_get_options($read_stream)['ssl']['session_meta'];
    $cert_data = openssl_x509_parse($context["options"]["ssl"]["peer_certificate"]);
    $chain_data = $context["options"]["ssl"]["peer_certificate_chain"];
    $chain_length = count($chain_data);
    if (isset($chain_data) && $chain_length < 10) {
      $chain_length = count($chain_data);
      $chain_arr_keys  = ($chain_data);
      foreach(array_keys($chain_arr_keys) as $key) {
        $curr = $chain_data[$key];
        $next = $chain_data[$key+1];
        $prev = $chain_data[$key-1];
        $chain_key = (string)$key+1;
        if ($key == 0) {
          $data["connection"] = ssl_conn_metadata_json($host, $port, $read_stream, $chain_data);
          $data["chain"][$chain_key] = cert_parse_json($curr, $next, $host, true);
        } else {
          $data["chain"][$chain_key] = cert_parse_json($curr, $next, null, false);
        }
      }
    } else {
      $data["error"] = ["Chain too long."];
      return $data;
    }
  }
  return $data;
}

?>