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