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                                 $sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),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
  60                         AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
  61                         dbesc($a->argv[1])
  62                 );
  63
  64                 if(count($r)) {
  65
  66                         $s = fetch_url($r[0]['poll'] . '?dfrn_id=' . $my_id . '&type=profile-check');
  67
  68                         if(strlen($s)) {
  69
  70                                 $xml = simplexml_load_string($s);
  71
  72                                 if((int) $xml->status == 1) {
  73                                         $_SESSION['authenticated'] = 1;
  74                                         $_SESSION['visitor_id'] = $r[0]['id'];
  75                                         notice( t('Hi ') . $r[0]['name'] . EOL);
  76                                         // Visitors get 1 day session.
  77                                         $session_id = session_id();
  78                                         $expire = time() + 86400;
  79                                         q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1",
  80                                                 dbesc($expire),
  81                                                 dbesc($session_id)
  82                                         );
  83                                 }
  84                         }
  85                         $profile = $r[0]['nickname'];
  86                         goaway((strlen($destination_url)) ? $destination_url : $a->get_baseurl() . '/profile/' . $profile);
  87                 }
  88                 goaway($a->get_baseurl());
  89
  90         }
  91
  92         if((x($type)) && ($type === 'profile-check')) {
  93
  94                 switch($direction) {
  95                         case 1:
  96                                 $dfrn_id = '0:' . $dfrn_id;
  97                                 break;
  98                         case 0:
  99                                 $dfrn_id = '1:' . $dfrn_id;
 100                                 break;
 101                         default:
 102                                 break;
 103                 }
 104                 q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 105                 $r = q("SELECT * FROM `profile_check` WHERE `dfrn_id` = '%s' ORDER BY `expire` DESC",
 106                         dbesc($dfrn_id));
 107                 if(count($r)) {
 108                         xml_status(1);
 109                         return; // NOTREACHED
 110                 }
 111                 xml_status(0);
 112                 return; // NOTREACHED
 113         }
 114
 115
 116 }
 117
 118
 119
 120 function dfrn_poll_post(&$a) {
 121
 122         $dfrn_id      = $_POST['dfrn_id'];
 123         $challenge    = $_POST['challenge'];
 124         $url          = $_POST['url'];
 125         $dfrn_version = (float) $_POST['dfrn_version'];
 126
 127         $direction    = (-1);
 128         if(strpos($dfrn_id,':') == 1) {
 129                 $direction = intval(substr($dfrn_id,0,1));
 130                 $dfrn_id = substr($dfrn_id,2);
 131         }
 132
 133
 134         $r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
 135                 dbesc($dfrn_id),
 136                 dbesc($challenge)
 137         );
 138
 139         if(! count($r))
 140                 killme();
 141
 142         $type = $r[0]['type'];
 143         $last_update = $r[0]['last_update'];
 144
 145         $r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
 146                 dbesc($dfrn_id),
 147                 dbesc($challenge)
 148         );
 149
 150
 151         $sql_extra = '';
 152         switch($direction) {
 153                 case (-1):
 154                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 155                         $my_id = $dfrn_id;
 156                         break;
 157                 case 0:
 158                         $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 159                         $my_id = '1:' . $dfrn_id;
 160                         break;
 161                 case 1:
 162                         $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 163                         $my_id = '0:' . $dfrn_id;
 164                         break;
 165                 default:
 166                         goaway($a->get_baseurl());
 167                         break; // NOTREACHED
 168         }
 169
 170
 171         $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 1");
 172
 173
 174         if(! count($r))
 175                 killme();
 176
 177         $owner_uid = $r[0]['uid'];
 178         $contact_id = $r[0]['id'];
 179
 180
 181         if($type === 'reputation' && strlen($url)) {
 182                 $r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 183                         dbesc($url),
 184                         intval($owner_uid)
 185                 );
 186                 $reputation = 0;
 187                 $text = '';
 188
 189                 if(count($r)) {
 190                         $reputation = $r[0]['rating'];
 191                         $text = $r[0]['reason'];
 192
 193                         if($r[0]['id'] == $contact_id) {        // inquiring about own reputation not allowed
 194                                 $reputation = 0;
 195                                 $text = '';
 196                         }
 197                 }
 198
 199                 echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
 200                 <reputation>
 201                         <url>$url</url>
 202                         <rating>$reputation</rating>
 203                         <description>$text</description>
 204                 </reputation>
 205                 ";
 206                 killme();
 207                 // NOTREACHED
 208         }
 209         else {
 210                 header("Content-type: application/atom+xml");
 211                 $o = get_feed_for($a,$dfrn_id, $a->argv[1], $last_update, $direction);
 212                 echo $o;
 213                 killme();
 214
 215         }
 216 }
 217
 218 function dfrn_poll_content(&$a) {
 219
 220
 221         $dfrn_id = '';
 222         $type = 'data';
 223
 224         if(x($_GET,'dfrn_id'))
 225                 $dfrn_id = $_GET['dfrn_id'];
 226         if(x($_GET,'type'))
 227                 $type = $_GET['type'];
 228         if(x($_GET,'last_update'))
 229                 $last_update = $_GET['last_update'];
 230
 231         $dfrn_version = (float) $_GET['dfrn_version'];
 232
 233         $direction = (-1);
 234         if(strpos($dfrn_id,':') == 1) {
 235                 $direction = intval(substr($dfrn_id,0,1));
 236                 $dfrn_id = substr($dfrn_id,2);
 237         }
 238
 239
 240         if($dfrn_id != '') {
 241                 // initial communication from external contact
 242                 $hash = random_string();
 243
 244                 $status = 0;
 245
 246                 $r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
 247
 248                 $r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
 249                         VALUES( '%s', '%s', '%s', '%s', '%s' ) ",
 250                         dbesc($hash),
 251                         dbesc($dfrn_id),
 252                         intval(time() + 60 ),
 253                         dbesc($type),
 254                         dbesc($last_update)
 255                 );
 256
 257
 258                 $sql_extra = '';
 259                 switch($direction) {
 260                         case (-1):
 261                                 $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 262                                 $my_id = $dfrn_id;
 263                                 break;
 264                         case 0:
 265                                 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 266                                 $my_id = '1:' . $dfrn_id;
 267                                 break;
 268                         case 1:
 269                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 270                                 $my_id = '0:' . $dfrn_id;
 271                                 break;
 272                         default:
 273                                 goaway($a->get_baseurl());
 274                                 break; // NOTREACHED
 275                 }
 276
 277
 278
 279
 280                 $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 1");
 281
 282                 if(count($r)) {
 283
 284                         $challenge = '';
 285                         $encrypted_id = '';
 286                         $id_str = $my_id . '.' . mt_rand(1000,9999);
 287
 288
 289                         if($r[0]['duplex'] && strlen($r[0]['pubkey'])) {
 290                                 openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
 291                                 openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
 292                         }
 293                         else {
 294                                 openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
 295                                 openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
 296                         }
 297
 298                         $challenge = bin2hex($challenge);
 299                         $encrypted_id = bin2hex($encrypted_id);
 300                 }
 301                 else {
 302                         $status = 1;
 303                 }
 304                 header("Content-type: text/xml");
 305                 echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
 306                         . '<dfrn_poll>' . "\r\n"
 307                         . "\t" . '<status>' .$status . '</status>' . "\r\n"
 308                         . "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n"
 309                         . "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n"
 310                         . "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
 311                         . '</dfrn_poll>' . "\r\n" ;
 312                 killme();
 313         }
 314 }
 315
 316