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<?php
# $Id: index.php 1986 2016-07-12 16:42:55Z raphael.pion $
#
# index.php for ALCASAR captive portal
# by REXY
# UI & css style by stephane ERARD
# The contents of this file may be used under the terms of the GNU
# General Public License Version 2, provided that the above copyright
# notice and this permission notice is included in all copies or
# substantial portions of the software.
/****************************************************************
*                       GLOBAL FILE PATHS                       *
*****************************************************************/
define ("CONF_FILE", "/usr/local/etc/alcasar.conf");

/****************************************************************
*                       FILE reading test                       *
*****************************************************************/
$conf_files=array(CONF_FILE);
foreach ($conf_files as $file){
        if (!file_exists($file)){
                exit("File ".$file." unknown");
        }
        if (!is_readable($file)){
                exit("You don't have read rights on the file ".$file);
        }
}
/****************************************************************
*                       Read CONF_FILE                          *
*****************************************************************/
$ouvre=fopen(CONF_FILE,"r");
if ($ouvre){
        while (!feof ($ouvre))
        {
                $tampon = fgets($ouvre, 4096);
                if (strpos($tampon,"=")!==false){
                        $tmp = explode("=",$tampon);
                        $conf[$tmp[0]] = $tmp[1];
                }
        }
}else{
        exit("Error opening the file ".CONF_FILE);
}
fclose($ouvre);
$organisme = trim($conf["ORGANISM"]);
$domainname = trim($conf["DOMAIN"]);
$hostname = "alcasar.".$domainname;
$network_pb = False;
$cert_add = "http://$hostname/certs";
$direct_access = False;
$diagnostic = "can't contact the default router";
$remote_ip = preg_match('#^([0-9]{1,3}\.){3}[0-9]{1,3}$#', $_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : "";
$tab = array();$user = array();
$connection_history =  "";
$nb_connection_history = 3;

# Obtenir l'état de connexion de l'utilisateur. 1 si connecté sinon 0.
exec ("sudo /usr/sbin/chilli_query list|grep $remote_ip" , $tab);
$user = explode (" ", $tab[0]);

#then we clean his cache to redirect him properly
header("Expires: Tue, 01 Jan 2000 00:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");


# on discrimine les accès directs sur Alcasar par rapport aux redirections (blacklist ou pannes rso)
if (isset($_SERVER['HTTP_HOST']) && (($_SERVER['HTTP_HOST'] == $_SERVER['SERVER_ADDR']) || preg_match ("/^alcasar$/", $_SERVER['HTTP_HOST']) || preg_match ("/^$hostname$/", $_SERVER['HTTP_HOST']) || preg_match ("/^$organisme$/", $_SERVER['HTTP_HOST'])))
        {
        $direct_access=True;
        }
#### Affichage des 3 dernières connexions de $user[5]
function secondsToDuration($seconds = null){
        if ($seconds == null) return "";

        $temp = $seconds % 3600;
        $time[0] = ( $seconds - $temp ) / 3600 ;        // hours
        $time[2] = $temp % 60 ;                         // seconds
        $time[1] = ( $temp - $time[2] ) / 60;           // minutes
        
        return $time[0]." h ".$time[1]." m ".$time[2]." s";
}

$l_connected = "connected"; // a traduire (choix de la langue ci-dessous mais nécessitant de $connection_history)
// si on a pas d'accès à la bdd, la page s'affiche quand même correctement
if ((isset ($user[4])) && ($user[4] != "0")){
        if ((is_file("./acc/manager/lib/sql/drivers/mysql/functions.php"))&&(is_file("/etc/freeradius-web/config.php"))){
                include_once("/etc/freeradius-web/config.php");
                include_once("./acc/manager/lib/sql/drivers/mysql/functions.php");
                
                $sql = "SELECT UserName, AcctStartTime, AcctStopTime, acctsessiontime FROM radacct WHERE UserName='$user[5]' ORDER BY AcctStartTime DESC LIMIT 0 , $nb_connection_history";
                $link = @da_sql_pconnect($config); // on affiche pas les erreurs
                
                if ($link){
                        $res = @da_sql_query($link,$config,$sql); // on affiche pas les erreurs
                        
                        if ($res){
                                $connection_history.= "<ul>";
                                while(($row = @da_sql_fetch_array($res,$config))){
                                        $connected = "";
                                        if ($row['acctstoptime'] == "") $connected = " ($l_connected)";
                                        $connection_history.="<li title='$row[username] $row[acctstarttime] $row[acctstoptime] (".secondsToDuration($row['acctsessiontime']).")'>$row[acctstarttime] (".secondsToDuration($row['acctsessiontime']).") $connected</li>";
                                }
                                $connection_history.="</ul>";
                        }
                }
        }
}
else
{
        # cas où l'utilisateur non-loggué décide de joindre une page HTTP/S => redirection http://URL
        exec("sudo /usr/sbin/ipset list not_auth_yet | grep $remote_ip | wc -l 2>&1", $ipset_not_auth_yet);
        # ALCASAR => redirection index.php
        # on place l'IP de l'utilisateur dans un ipset not_auth_yet pour ne pas boucler sur index.php et atteindre la page souhaité qui sera traité par coova-chilli
        if(!$direct_access && $ipset_not_auth_yet[0] == '0')
        {
                exec("sudo /usr/sbin/ipset add not_auth_yet $remote_ip");
                #On force l'utilisateur a refaire une requete DNS sur la même URL intercepté. (comme un CTRL+F5)
                echo "<script>window.location.reload(true)</script>";
                echo "<script>window.location.href='http://$_SERVER[HTTP_HOST]'</script>";
                header("Location: http://$_SERVER[HTTP_HOST]");
                exit;   
        }
        
}
####

# Choice of language
$Language = 'en';
if(isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])){
  $Langue = explode(",",$_SERVER['HTTP_ACCEPT_LANGUAGE']);
  $Language = strtolower(substr(chop($Langue[0]),0,2)); }
if($Language == 'fr'){
  $l_access_denied = "ACC&Egrave;S REFUS&Eacute;";
  $l_access_welcome = "Bienvenue sur ALCASAR";
  $l_access_unavailable = "ACC&Egrave;S INDISPONIBLE";
  $l_required_domain = "Site WEB demand&eacute;";
  $l_explain_acc_access = "Le centre de gestion permet d'administrer le portail. Vous devez poss&eacute;der un compte d'administration ou de gestion pour y acc&eacute;der.";
  $l_explain_access_deny = "Vous tentez d'acc&eacute;der &agrave; une ressource dont le contenu est r&eacute;put&eacute; contenir des informations inappropri&eacute;es.";
  $l_explain_net_pb = "Votre portail d&eacute;tecte que l'acc&egrave;s &agrave; Internet est indisponible.";
  $l_contact_access_deny = "Contactez le responsable de la s&eacute;curit&eacute; (OSSI/RSSI) si vous pensez que ce filtrage est abusif.";
  $l_contact_net_pb = "Contactez votre responsable informatique ou votre prestataire Internet pour plus d'information.";
  $l_welcome = "Page principale de votre portail captif";
  $l_sms_access = "<a href=\"https://$hostname/autoregistrationinfo.php\">Auto Enregistrement par SMS</a>";
  $l_install_certif = "<a href=\"$cert_add/certificat_alcasar_ca.der\">Installer le certificat racine</a>";
  $l_install_certif_more = "<a href=\"$cert_add/certificat_alcasar_ca.der\">Installation du certificat de l'autorit&eacute; racine d'ALCASAR</a>";
  $l_certif_explain = "Permet l'&eacute;change de donn&eacute;es s&eacute;curis&eacute;es entre votre station de consultation et le portail captif ALCASAR.<BR>Si ce certificat n'est pas enregistr&eacute; sur votre station de consultation, il est possible que des alertes de s&eacute;curit&eacute;s soient &eacute;mises par votre navigateur.<br><br>";
  $l_certif_explain_help = "<a href=\"alcasar-certificat.pdf\" target=\"_blank\">Aide complémentaire</a>";
  $l_category = "catégorie :";
if ((isset ($user[4])) && ($user[4] == "0")) {
          $l_logout_explain = "Aucune session de consultation Internet n'est actuellement ouverte sur votre syst&egrave;me.";
          $l_logout = "<a href=\"http://www.google.com\">Ouvrir une session Internet</a>";
          

        }
  else {
          if ($user[5] != $user[0]) // authentication exception or not
          {
                $l_logout_explain = "Ferme la session de l'usager actuellement connect&eacute;. <br><br>Utilisateur connect&eacute; : <a href=\"http://$hostname:3990/logoff\" title=\"Deconnecter l'utilisateur $user[5]\"><b>$user[5]</b></a><br><br>$nb_connection_history derni&egrave;res connexions :$connection_history";
                $l_logout = "<a href=\"http://$hostname:3990/logoff\">Se d&eacute;connecter d'internet</a>";
          }
          else
          {
                  $l_logout_explain = "Votre système ($user[5]) est en exception d'authentication.<br><br>$nb_connection_history last connections :$connection_history";
                  $l_logout = "Information des connexions";
          }
        }
  $l_password_change = "<a href=\"https://$hostname/pass\">Changer votre mot de passe</a>";
  $l_password_change_explain = "Vous redirige sur la page de changement du mot de passe de votre compte d'acc&egrave;s &agrave; internet.<br><br>Vous devez avoir un compte internet valide.";
  $l_sms_explain = "Vous redirige vers une la page explicative de l'auto enregistrement par SMS.<br><br><strong>Identifiant:</strong> votre numéro de téléphone<br><strong>Mot de passe:</strong> votre message";
  $l_back_page = "<a href=\"javascript:history.back()\">Page pr&eacute;c&eacute;dente</a>";
  $l_service_sms = "Service SMS actif";
  $l_service_sms_n = "Service SMS non actif";
  $l_acc_sms = "Auto enregistrement par SMS";
}
else if($Language == 'pt'){
  $l_access_denied = "Acesso negado";
  $l_access_welcome = "Bem-vindo ao Alcasar";
  $l_access_unavailable = "ACESSO INDISPONÍVEL";
  $l_required_domain = "Site WEB Obrigatório";
  $l_explain_acc_access = "Este é o centro de controle do portal para acessar você deve ter uma conta administrativa valida.";
  $l_explain_access_deny = "Você tenta se conectar a um recurso cujo conteúdo é considerado inadequado no conteúdo de informações.";
  $l_explain_net_pb = "O sistema detectou que o acesso é de risco, não será permitido o acesso";
  $l_contact_access_deny = "Entre em contato com o administrador do sistema de segurança se acha que essa filtragem é abusiva.";
  $l_contact_net_pb = "Entre em contato com a empresa fornecedora de Internet para mais informações";
  $l_welcome = "Página do portal";
  $l_sms_access = "<a href=\"https://$hostname/autoregistrationinfo.php\">Auto Registration by SMS</a>";
  $l_install_certif = "<a href=\"$cert_add/certificat_alcasar_ca.der\">Instalar Certificado Alcasar AC</a>";
  $l_install_certif_more = "<a href=\"$cert_add/certificat_alcasar_ca.der\">Instalar Certificado Alcasar AC</a>";
  $l_certif_explain = "O certificado Permiti a troca de dados seguro entre seu computador e o portal Alcasar.<BR>Se este certificado não estiver incorporado no seu computador, alguns alertas de segurança deverá aparecer no navegador.<br><br>";
  $l_certif_explain_help = "<a href=\"alcasar-certificat.pdf\" target=\"_blank\">Essa foi uma ajuda complementar</a>";
  $l_category = "categoria :";
if ((isset ($user[4])) && ($user[4] == "0")) {
          $l_logout_explain = "Não há conexão de Internet aberta em seu computador, deseja conectar?";
          $l_logout = "<a href=\"http://www.google.com\">Abrir uma conexão de Internet</a>";
          

        }
  else {
          if ($user[5] != $user[0]) // authentication exception or not
          {
                  $l_logout_explain = "Se desejar, feche a conexão do usuário atual conectado.<br> Usuário conectado : <a href=\"http://$hostname:3990/logoff\" title=\"Disconnect user $user[5]\"><b>$user[5]</b></a><br><br>$nb_connection_history last connections :$connection_history";
                  $l_logout = "<a href=\"http://$hostname:3990/logoff\">Sair da Internet</a>";
          }
          else
          {
                  $l_logout_explain = "O sistema ($user[5]) detctou exesso de autenticação.<br><br>$nb_connection_history logins últimos :$connection_history";
                  $l_logout = "Informações de conexões";
          }
        }
  $l_password_change = "<a href=\"https://$hostname/pass\">Mudar sua senha</a>";
  $l_password_change_explain = "Você será redirecionado à página de alteração de senha.<br><br> e deverá ter uma conta de usuário valido para efetuar a troca e acessar à Internet.";
  $l_sms_explain = "Redirect you on auto registration page.<br><br><strong>Login:</strong> your phone number<br><strong>Password:</strong> SMS content";
  $l_back_page = "<a href=\"javascript:history.back()\">Página anterior</a>";
  $l_service_sms = "SMS service enable";
  $l_service_sms_n = "SMS service disable";
  $l_acc_sms = "Auto registration by SMS";
}
else {
  $l_access_denied = "ACCESS DENIED";
  $l_access_welcome = "Welcome on ALCASAR";
  $l_access_unavailable = "ACCESS UNAVAILABLE";
  $l_required_domain = "Required WEB site";
  $l_explain_acc_access = "This center control the portal. You must have an administrative account.";
  $l_explain_access_deny = "You try to connect to a resource whose content is deemed to contain inappropriate information.";
  $l_explain_net_pb = "Your portal has just detected that the Internet access is down";
  $l_contact_access_deny = "Contact your security system manager if you think this filtering is abusive.";
  $l_contact_net_pb = "Contact your network responsive or your Internet provider for more information";
  $l_welcome = "Your captive portal main page";
  $l_sms_access = "<a href=\"https://$hostname/autoregistrationinfo.php\">Auto Registration by SMS</a>";
  $l_install_certif = "<a href=\"$cert_add/certificat_alcasar_ca.der\">Install ALCASAR AC Certificate</a>";
  $l_install_certif_more = "<a href=\"$cert_add/certificat_alcasar_ca.der\">Install ALCASAR AC Certificate</a>";
  $l_certif_explain = "Allow secure data exchange between your computer and ALCASAR portal.<BR>If this certificate isn't incorporated in your computer, some security alerts should appear in your browser.<br><br>";
  $l_certif_explain_help = "<a href=\"alcasar-certificat.pdf\" target=\"_blank\">Complementary help</a>";
  $l_category = "category :";
if ((isset ($user[4])) && ($user[4] == "0")) {
          $l_logout_explain = "No Internet consultation session is actualy open on your system";
                $l_logout = "<a href=\"http://www.google.com\">Open an Internet session</a>";
          

        }
  else {
          if ($user[5] != $user[0]) // authentication exception or not
          {
                  $l_logout_explain = "Close the session of the user currently connected.<br> User logged-on : <a href=\"http://$hostname:3990/logoff\" title=\"Disconnect user $user[5]\"><b>$user[5]</b></a><br><br>$nb_connection_history last connections :$connection_history";
                  $l_logout = "<a href=\"http://$hostname:3990/logoff\">Logoff from internet</a>";
          }
          else
          {
                  $l_logout_explain = "Your system ($user[5]) is in exception of authentication.<br><br>$nb_connection_history Last logins :$connection_history";
                  $l_logout = "Connections information";
          }
        }
  $l_password_change = "<a href=\"https://$hostname/pass\">Change your password</a>";
  $l_password_change_explain = "Redirect you on password change page.<br><br> You should already have an Internet access account.";
  $l_sms_explain = "Redirect you on auto registration page.<br><br><strong>Login:</strong> your phone number<br><strong>Password:</strong> SMS content";
  $l_back_page = "<a href=\"javascript:history.back()\">Previous page</a>";
  $l_service_sms = "SMS service enable";
  $l_service_sms_n = "SMS service disable";
  $l_acc_sms = "Auto registration by SMS";
}
$l_title = ($direct_access ? $l_access_welcome : ($network_pb ? $l_access_unavailable : $l_access_denied));
$l_explain = ($direct_access ? $l_explain_acc_access : ($network_pb ? $l_explain_net_pb : $l_explain_access_deny));

# Attribution des icones / images
$img_rep = "images/";
$img_organisme = "organisme.png";
$img_access = "globe_acces_70.png";
$img_connect = "globe_70.png";
$img_warning = "globe_warning_70.png";
$img_pwd = "cle_ombre.png";
$img_certificate = "certificat.png";
$img_acc = "logo-alcasar_70.png";
$img_sms = "sms.png";
$img_false = "interdit.png";
$img_adm = "adm.png";
$img_internet = $img_connect;

if ((isset ($user[4])) && ($user[4] == "0")) {
        if (! $network_pb) {
                $img_internet = $img_access;
                }
                else {
                $img_internet = $img_warning;
        }
}
else {
        $img_internet = $img_connect;
}

?>
        <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
        <html>
        <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>ALCASAR - <?php echo $l_title; ?></title>
        <meta http-equiv="Cache-control" content="no-cache">
        <meta http-equiv="Pragma" content="no-cache">
        <link rel="stylesheet" type="text/css" href="css/style_intercept.css">
        <script type="text/javascript">
                function valoriserDiv5(param){
                        document.getElementById("box_info").innerHTML = param.innerHTML;
                }
        </script>
</head>
<body onload="valoriserDiv5(text_conn);">
<?php
if ($direct_access){
        echo "
                <div id=\"cadre_titre\" class=\"titre_controle\">
                        <p id=\"acces_controle\" class=\"titre_controle\">$l_title</p>";
        if ($network_pb) {
                echo "  <span>$l_explain_net_pb</span>";
                }
        }
        else {
                echo"
                        <div id=\"cadre_titre\" class=\"titre_refus\">
                                <p id=\"acces_controle\" class=\"titre_refus\">$l_title</p>";
        }
?>
                        <div id="boite_logo">
                                <img src="images/organisme.png">
                        </div>
                </div>
                <div id="contenu_acces">
                        <div id="box_url">
<?php 
//search here in the blacklist categories (if ((! $direct_access) && (! $network_pb)){}
?>
                        </div>
<?php
# CHECK IF the SMS service is enable
$service_SMS_status="false";
if ($service_SMS_status == "true") {
$sms_div='      
                        <div class="box_menu" id="box_acc" onmouseover="valoriserDiv5(text_acc);">
                                <span>'.$l_sms_access.'</span>
                                <img src="'.$img_rep.''.$img_sms.'">
                        </div>
';

$sms_div_over='                 
                        <div class="div-cache" id="text_acc">
                                <h2>'.$l_sms_access.'</h2>
                                <p>'.$l_sms_explain.'</p>
                                <p><font color="green"><center>'.$l_service_sms.'</center></font></p>
                                <img src="'.$img_rep.''.$img_sms.'">
                        </div>
';
}
else {
$sms_div='';
$sms_div_over='';
}
?>
<?php
if ($direct_access){
        echo "  <div id=\"box_bienvenue\">
                                $l_welcome
                        </div>
                        <div class=\"box_menu\" id=\"box_conn\" onmouseover=\"valoriserDiv5(text_conn);\">
                                <span>$l_logout</span>
                                <img src=\"$img_rep$img_internet\">
                        </div>
                        <div class=\"box_menu\" id=\"box_certif\" onmouseover=\"valoriserDiv5(text_certif);\">
                                <span>$l_install_certif</span>
                                <img src=\"$img_rep$img_certificate\">
                        </div>
                        <div class=\"box_menu\" id=\"box_mdp\" onmouseover=\"valoriserDiv5(text_mdp);\">
                                <img src=\"$img_rep$img_pwd\">
                                <span>$l_password_change</span>
                        </div>          
                        $sms_div
                        <div class=\"div-cache\" id=\"text_conn\">
                                <h2>$l_logout</h2>
                                <p>$l_logout_explain</p>
                                <img src=\"$img_rep$img_internet\">
                        </div>
                        <div class=\"div-cache\" id=\"text_certif\">
                                <h2>$l_install_certif_more</h2>
                                <p>$l_certif_explain $l_certif_explain_help</p>
                                <img src=\"$img_rep$img_certificate\">                          
                        </div>
                        <div class=\"div-cache\" id=\"text_mdp\">
                                <h2>$l_password_change</h2>
                                <p>$l_password_change_explain</p>
                                <img src=\"$img_rep$img_pwd\">
                        </div>
                        $sms_div_over
                        <div id=\"box_info\">
                        </div>";
        }
        else {
                echo "
                        <div id=\"box_refuse\">
                                <img src=\"$img_rep$img_false\">
                                <p>$l_explain</p>
                        </div>
                        <div id=\"liens_redir\">
                                <p>$l_back_page</p>
                        </div>";
                }
        if (($network_pb)&&(! $direct_access)) {
        echo "  <span>Diagnostic : $diagnostic</span>";
        }
?>
                </div>
                <div id="corner">
                        <div id="adm" class="corn">
                                <a href="https://<?php echo $hostname; ?>/acc/"><img src=<?php echo $img_rep.''.$img_adm; ?>></a>
                        </div>
                </div>
        </body>
</html>