safechat/html/send.php

<?php
/*! @file

    @id $Id$

    @see @ref apisend

    @page api

    @section apisend Send Message To Server

    API-call send.php

    Send a message to the server. Sever checks if user exists and has
    a valid public key. More test could be added later.

    @param user The name of the user that send the message.

    @param msg The armored signed and encrypted message. There is a
               limit of 100000 bytes for the message.

    @return
      - success() if the message has been stored successfully
      - error() in case of any error
*/
//       1         2         3         4         5         6         7         8
// 45678901234567890123456789012345678901234567890123456789012345678901234567890
try {
  require_once("opendb.php");
  $user = $db->real_escape_string($_REQUEST['user']);
  $msg = $db->real_escape_string($_REQUEST['msg']);
  if (strlen($_REQUEST['msg'])>100000) error("message is too long");
  $q = $db->query("select pubkey from user where name='$user';");
  if (!$q || $q->num_rows!=1) error("user not found on server");
  $pubkey = gnupg_import($pgp, $q->fetch_row()[0]);
  if (!$pubkey) error("wrong identity");
  $q = $db->query("insert into message (user, msg) values ('$user', '$msg');");
  if (!$q) {
    error_log("Error storing message: ".$db->error);
    error("storing message failed");
  }
  success("message stored");
} catch (Exception $e) {
  error_log("Error storing message: ".$e->message);
  error("storing message failed");
}

?>