mod/dfrn_poll.php

   1 <?php
   2
   3 require_once('include/items.php');
   4 require_once('include/auth.php');
   5
   6
   7 function dfrn_poll_init(&$a) {
   8
   9         $dfrn_id = '';
  10
  11         if(x($_GET,'dfrn_id'))
  12                 $dfrn_id = $_GET['dfrn_id'];
  13         if(x($_GET,'type'))
  14                 $type = $_GET['type'];
  15         if(x($_GET,'last_update'))
  16                 $last_update = $_GET['last_update'];
  17         $dfrn_version    = (float) $_GET['dfrn_version'] ;
  18         $destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url'] : '');
  19
  20
  21         $direction = (-1);
  22
  23
  24         if(strpos($dfrn_id,':') == 1) {
  25                 $direction = intval(substr($dfrn_id,0,1));
  26                 $dfrn_id = substr($dfrn_id,2);
  27         }
  28
  29         if(($dfrn_id === '') && (! x($_POST,'dfrn_id')) && ($a->argc > 1)) {
  30                 header("Content-type: application/atom+xml");
  31                 $o = get_feed_for($a, '*', $a->argv[1],$last_update);
  32                 echo $o;
  33                 killme();
  34         }
  35
  36         if((x($type)) && ($type === 'profile')) {
  37
  38                 $sql_extra = '';
  39                 switch($direction) {
  40                         case (-1):
  41                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' ", dbesc($dfrn_id));
  42                                 $my_id = $dfrn_id;
  43                                 break;
  44                         case 0:
  45                                 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  46                                 $my_id = '1:' . $dfrn_id;
  47                                 break;
  48                         case 1:
  49                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  50                                 $my_id = '0:' . $dfrn_id;
  51                                 break;
  52                         default:
  53                                 goaway($a->get_baseurl());
  54                                 break; // NOTREACHED
  55                 }
  56
  57                 $r = q("SELECT `contact`.*, `user`.`nickname`
  58                         FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
  59                         WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0 $sql_extra LIMIT 1");
  60
  61                 if(count($r)) {
  62
  63                         $s = fetch_url($r[0]['poll'] . '?dfrn_id=' . $my_id . '&type=profile-check');
  64
  65                         if(strlen($s)) {
  66
  67                                 $xml = simplexml_load_string($s);
  68
  69                                 if((int) $xml->status == 1) {
  70                                         $_SESSION['authenticated'] = 1;
  71                                         $_SESSION['visitor_id'] = $r[0]['id'];
  72                                         notice( t('Hi ') . $r[0]['name'] . EOL);
  73                                         // Visitors get 1 day session.
  74                                         $session_id = session_id();
  75                                         $expire = time() + 86400;
  76                                         q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1",
  77                                                 dbesc($expire),
  78                                                 dbesc($session_id)
  79                                         );
  80                                 }
  81                         }
  82                         $profile = $r[0]['nickname'];
  83                         goaway((strlen($destination_url)) ? $destination_url : $a->get_baseurl() . '/profile/' . $profile);
  84                 }
  85                 goaway($a->get_baseurl());
  86
  87         }
  88
  89         if((x($type)) && ($type === 'profile-check')) {
  90
  91                 switch($direction) {
  92                         case 1:
  93                                 $dfrn_id = '0:' . $dfrn_id;
  94                                 break;
  95                         case 0:
  96                                 $dfrn_id = '1:' . $dfrn_id;
  97                                 break;
  98                         default:
  99                                 break;
 100                 }
 101                 q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 102                 $r = q("SELECT * FROM `profile_check` WHERE `dfrn_id` = '%s' ORDER BY `expire` DESC",
 103                         dbesc($dfrn_id));
 104                 if(count($r)) {
 105                         xml_status(1);
 106                         return; // NOTREACHED
 107                 }
 108                 xml_status(0);
 109                 return; // NOTREACHED
 110         }
 111
 112
 113 }
 114
 115
 116
 117 function dfrn_poll_post(&$a) {
 118
 119         $dfrn_id      = $_POST['dfrn_id'];
 120         $challenge    = $_POST['challenge'];
 121         $url          = $_POST['url'];
 122         $dfrn_version = (float) $_POST['dfrn_version'];
 123
 124         $direction    = (-1);
 125         if(strpos($dfrn_id,':') == 1) {
 126                 $direction = intval(substr($dfrn_id,0,1));
 127                 $dfrn_id = substr($dfrn_id,2);
 128         }
 129
 130
 131         $r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
 132                 dbesc($dfrn_id),
 133                 dbesc($challenge)
 134         );
 135
 136         if(! count($r))
 137                 killme();
 138
 139         $type = $r[0]['type'];
 140         $last_update = $r[0]['last_update'];
 141
 142         $r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
 143                 dbesc($dfrn_id),
 144                 dbesc($challenge)
 145         );
 146
 147
 148         $sql_extra = '';
 149         switch($direction) {
 150                 case (-1):
 151                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 152                         $my_id = $dfrn_id;
 153                         break;
 154                 case 0:
 155                         $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 156                         $my_id = '1:' . $dfrn_id;
 157                         break;
 158                 case 1:
 159                         $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 160                         $my_id = '0:' . $dfrn_id;
 161                         break;
 162                 default:
 163                         goaway($a->get_baseurl());
 164                         break; // NOTREACHED
 165         }
 166
 167
 168         $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 1");
 169
 170
 171         if(! count($r))
 172                 killme();
 173
 174         $owner_uid = $r[0]['uid'];
 175         $contact_id = $r[0]['id'];
 176
 177
 178         if($type === 'reputation' && strlen($url)) {
 179                 $r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 180                         dbesc($url),
 181                         intval($owner_uid)
 182                 );
 183                 $reputation = 0;
 184                 $text = '';
 185
 186                 if(count($r)) {
 187                         $reputation = $r[0]['rating'];
 188                         $text = $r[0]['reason'];
 189
 190                         if($r[0]['id'] == $contact_id) {        // inquiring about own reputation not allowed
 191                                 $reputation = 0;
 192                                 $text = '';
 193                         }
 194                 }
 195
 196                 echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
 197                 <reputation>
 198                         <url>$url</url>
 199                         <rating>$reputation</rating>
 200                         <description>$text</description>
 201                 </reputation>
 202                 ";
 203                 killme();
 204                 // NOTREACHED
 205         }
 206         else {
 207                 header("Content-type: application/atom+xml");
 208                 $o = get_feed_for($a,$dfrn_id, $a->argv[1], $last_update, $direction);
 209                 echo $o;
 210                 killme();
 211
 212         }
 213 }
 214
 215 function dfrn_poll_content(&$a) {
 216
 217
 218         $dfrn_id = '';
 219         $type = 'data';
 220
 221         if(x($_GET,'dfrn_id'))
 222                 $dfrn_id = $_GET['dfrn_id'];
 223         if(x($_GET,'type'))
 224                 $type = $_GET['type'];
 225         if(x($_GET,'last_update'))
 226                 $last_update = $_GET['last_update'];
 227
 228         $dfrn_version = (float) $_GET['dfrn_version'];
 229
 230         $direction = (-1);
 231         if(strpos($dfrn_id,':') == 1) {
 232                 $direction = intval(substr($dfrn_id,0,1));
 233                 $dfrn_id = substr($dfrn_id,2);
 234         }
 235
 236
 237         if($dfrn_id != '') {
 238                 // initial communication from external contact
 239                 $hash = random_string();
 240
 241                 $status = 0;
 242
 243                 $r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
 244
 245                 $r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
 246                         VALUES( '%s', '%s', '%s', '%s', '%s' ) ",
 247                         dbesc($hash),
 248                         dbesc($dfrn_id),
 249                         intval(time() + 60 ),
 250                         dbesc($type),
 251                         dbesc($last_update)
 252                 );
 253
 254
 255                 $sql_extra = '';
 256                 switch($direction) {
 257                         case (-1):
 258                                 $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 259                                 $my_id = $dfrn_id;
 260                                 break;
 261                         case 0:
 262                                 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 263                                 $my_id = '1:' . $dfrn_id;
 264                                 break;
 265                         case 1:
 266                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 267                                 $my_id = '0:' . $dfrn_id;
 268                                 break;
 269                         default:
 270                                 goaway($a->get_baseurl());
 271                                 break; // NOTREACHED
 272                 }
 273
 274
 275
 276
 277                 $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 1");
 278
 279                 if(count($r)) {
 280
 281                         $challenge = '';
 282                         $encrypted_id = '';
 283                         $id_str = $my_id . '.' . mt_rand(1000,9999);
 284
 285
 286                         if($r[0]['duplex'] && strlen($r[0]['pubkey'])) {
 287                                 openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
 288                                 openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
 289                         }
 290                         else {
 291                                 openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
 292                                 openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
 293                         }
 294
 295                         $challenge = bin2hex($challenge);
 296                         $encrypted_id = bin2hex($encrypted_id);
 297                 }
 298                 else {
 299                         $status = 1;
 300                 }
 301                 header("Content-type: text/xml");
 302                 echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
 303                         . '<dfrn_poll>' . "\r\n"
 304                         . "\t" . '<status>' .$status . '</status>' . "\r\n"
 305                         . "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n"
 306                         . "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n"
 307                         . "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
 308                         . '</dfrn_poll>' . "\r\n" ;
 309                 killme();
 310         }
 311 }
 312
 313