mod/dfrn_poll.php

   1 <?php
   2
   3
   4
   5 require_once('include/items.php');
   6 require_once('include/auth.php');
   7
   8
   9 function dfrn_poll_init(&$a) {
  10
  11
  12         $dfrn_id         = ((x($_GET,'dfrn_id'))         ? $_GET['dfrn_id']              : '');
  13         $type            = ((x($_GET,'type'))            ? $_GET['type']                 : 'data');
  14         $last_update     = ((x($_GET,'last_update'))     ? $_GET['last_update']          : '');
  15         $destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url']      : '');
  16         $challenge       = ((x($_GET,'challenge'))       ? $_GET['challenge']            : '');
  17         $sec             = ((x($_GET,'sec'))             ? $_GET['sec']                  : '');
  18         $dfrn_version    = ((x($_GET,'dfrn_version'))    ? (float) $_GET['dfrn_version'] : 2.0);
  19         $perm            = ((x($_GET,'perm'))            ? $_GET['perm']                 : 'r');
  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                 if((get_config('system','block_public')) && (! local_user()) && (! remote_user())) {
  31                         killme();
  32                 }
  33
  34                 $r = q("SELECT `hidewall` FROM `user` WHERE `user`.`nickname` = '%s' LIMIT 1",
  35                         dbesc($a->argv[1])
  36                 );
  37                 if(count($r) && $r[0]['hidewall'])
  38                         killme();
  39
  40                 logger('dfrn_poll: public feed request from ' . $_SERVER['REMOTE_ADDR'] );
  41                 header("Content-type: application/atom+xml");
  42                 $o = get_feed_for($a, '', $a->argv[1],$last_update);
  43                 echo $o;
  44                 killme();
  45         }
  46
  47         if(($type === 'profile') && (! strlen($sec))) {
  48
  49                 $sql_extra = '';
  50                 switch($direction) {
  51                         case (-1):
  52                                 $sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id));
  53                                 $my_id = $dfrn_id;
  54                                 break;
  55                         case 0:
  56                                 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  57                                 $my_id = '1:' . $dfrn_id;
  58                                 break;
  59                         case 1:
  60                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  61                                 $my_id = '0:' . $dfrn_id;
  62                                 break;
  63                         default:
  64                                 goaway(z_root());
  65                                 break; // NOTREACHED
  66                 }
  67
  68                 $r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname`
  69                         FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
  70                         WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
  71                         AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
  72                         dbesc($a->argv[1])
  73                 );
  74
  75                 if(count($r)) {
  76
  77                         $s = fetch_url($r[0]['poll'] . '?dfrn_id=' . $my_id . '&type=profile-check');
  78
  79                         logger("dfrn_poll: old profile returns " . $s, LOGGER_DATA);
  80
  81                         if(strlen($s)) {
  82
  83                                 $xml = parse_xml_string($s);
  84
  85                                 if((int) $xml->status == 1) {
  86                                         $_SESSION['authenticated'] = 1;
  87                                         $_SESSION['visitor_id'] = $r[0]['id'];
  88                                         $_SESSION['visitor_home'] = $r[0]['url'];
  89                                         $_SESSION['visitor_handle'] = $r[0]['addr'];
  90                                         $_SESSION['visitor_visiting'] = $r[0]['uid'];
  91                                         info( sprintf(t('%s welcomes %s'), $r[0]['username'] , $r[0]['name']) . EOL);
  92                                         // Visitors get 1 day session.
  93                                         $session_id = session_id();
  94                                         $expire = time() + 86400;
  95                                         q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1",
  96                                                 dbesc($expire),
  97                                                 dbesc($session_id)
  98                                         );
  99                                 }
 100                         }
 101                         $profile = $r[0]['nickname'];
 102                         goaway((strlen($destination_url)) ? $destination_url : $a->get_baseurl() . '/profile/' . $profile);
 103                 }
 104                 goaway(z_root());
 105
 106         }
 107
 108         if($type === 'profile-check' && $dfrn_version < 2.2 ) {
 109
 110                 if((strlen($challenge)) && (strlen($sec))) {
 111
 112                         q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 113                         $r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
 114                                 dbesc($sec)
 115                         );
 116                         if(! count($r)) {
 117                                 xml_status(3, 'No ticket');
 118                                 // NOTREACHED
 119                         }
 120                         $orig_id = $r[0]['dfrn_id'];
 121                         if(strpos($orig_id, ':'))
 122                                 $orig_id = substr($orig_id,2);
 123
 124                         $c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 125                                 intval($r[0]['cid'])
 126                         );
 127                         if(! count($c)) {
 128                                 xml_status(3, 'No profile');
 129                         }
 130                         $contact = $c[0];
 131
 132                         $sent_dfrn_id = hex2bin($dfrn_id);
 133                         $challenge    = hex2bin($challenge);
 134
 135                         $final_dfrn_id = '';
 136
 137                         if(($contact['duplex']) && strlen($contact['prvkey'])) {
 138                                 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
 139                                 openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']);
 140                         }
 141                         else {
 142                                 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
 143                                 openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']);
 144                         }
 145
 146                         $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 147
 148                         if(strpos($final_dfrn_id,':') == 1)
 149                                 $final_dfrn_id = substr($final_dfrn_id,2);
 150
 151                         if($final_dfrn_id != $orig_id) {
 152                                 logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
 153                                 // did not decode properly - cannot trust this site
 154                                 xml_status(3, 'Bad decryption');
 155                         }
 156
 157                         header("Content-type: text/xml");
 158                         echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
 159                         killme();
 160                         // NOTREACHED
 161                 }
 162                 else {
 163                                 // old protocol
 164
 165                         switch($direction) {
 166                                 case 1:
 167                                         $dfrn_id = '0:' . $dfrn_id;
 168                                         break;
 169                                 case 0:
 170                                         $dfrn_id = '1:' . $dfrn_id;
 171                                         break;
 172                                 default:
 173                                         break;
 174                         }
 175
 176
 177                         q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 178                         $r = q("SELECT * FROM `profile_check` WHERE `dfrn_id` = '%s' ORDER BY `expire` DESC",
 179                                 dbesc($dfrn_id));
 180                         if(count($r)) {
 181                                 xml_status(1);
 182                                 return; // NOTREACHED
 183                         }
 184                         xml_status(0);
 185                         return; // NOTREACHED
 186                 }
 187         }
 188
 189 }
 190
 191
 192
 193 function dfrn_poll_post(&$a) {
 194
 195         $dfrn_id      = ((x($_POST,'dfrn_id'))      ? $_POST['dfrn_id']              : '');
 196         $challenge    = ((x($_POST,'challenge'))    ? $_POST['challenge']            : '');
 197         $url          = ((x($_POST,'url'))          ? $_POST['url']                  : '');
 198         $sec          = ((x($_POST,'sec'))          ? $_POST['sec']                  : '');
 199         $ptype        = ((x($_POST,'type'))         ? $_POST['type']                 : '');
 200         $dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
 201         $perm         = ((x($_POST,'perm'))         ? $_POST['perm']                 : 'r');
 202
 203         if($ptype === 'profile-check') {
 204
 205                 if((strlen($challenge)) && (strlen($sec))) {
 206
 207                         logger('dfrn_poll: POST: profile-check');
 208
 209                         q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 210                         $r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
 211                                 dbesc($sec)
 212                         );
 213                         if(! count($r)) {
 214                                 xml_status(3, 'No ticket');
 215                                 // NOTREACHED
 216                         }
 217                         $orig_id = $r[0]['dfrn_id'];
 218                         if(strpos($orig_id, ':'))
 219                                 $orig_id = substr($orig_id,2);
 220
 221                         $c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 222                                 intval($r[0]['cid'])
 223                         );
 224                         if(! count($c)) {
 225                                 xml_status(3, 'No profile');
 226                         }
 227                         $contact = $c[0];
 228
 229                         $sent_dfrn_id = hex2bin($dfrn_id);
 230                         $challenge    = hex2bin($challenge);
 231
 232                         $final_dfrn_id = '';
 233
 234                         if(($contact['duplex']) && strlen($contact['prvkey'])) {
 235                                 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
 236                                 openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']);
 237                         }
 238                         else {
 239                                 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
 240                                 openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']);
 241                         }
 242
 243                         $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 244
 245                         if(strpos($final_dfrn_id,':') == 1)
 246                                 $final_dfrn_id = substr($final_dfrn_id,2);
 247
 248                         if($final_dfrn_id != $orig_id) {
 249                                 logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
 250                                 // did not decode properly - cannot trust this site
 251                                 xml_status(3, 'Bad decryption');
 252                         }
 253
 254                         header("Content-type: text/xml");
 255                         echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
 256                         killme();
 257                         // NOTREACHED
 258                 }
 259
 260         }
 261
 262         $direction    = (-1);
 263         if(strpos($dfrn_id,':') == 1) {
 264                 $direction = intval(substr($dfrn_id,0,1));
 265                 $dfrn_id   = substr($dfrn_id,2);
 266         }
 267
 268
 269         $r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
 270                 dbesc($dfrn_id),
 271                 dbesc($challenge)
 272         );
 273
 274         if(! count($r))
 275                 killme();
 276
 277         $type = $r[0]['type'];
 278         $last_update = $r[0]['last_update'];
 279
 280         $r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
 281                 dbesc($dfrn_id),
 282                 dbesc($challenge)
 283         );
 284
 285
 286         $sql_extra = '';
 287         switch($direction) {
 288                 case (-1):
 289                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 290                         $my_id = $dfrn_id;
 291                         break;
 292                 case 0:
 293                         $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 294                         $my_id = '1:' . $dfrn_id;
 295                         break;
 296                 case 1:
 297                         $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 298                         $my_id = '0:' . $dfrn_id;
 299                         break;
 300                 default:
 301                         goaway(z_root());
 302                         break; // NOTREACHED
 303         }
 304
 305
 306         $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 1");
 307
 308
 309         if(! count($r))
 310                 killme();
 311
 312         $contact = $r[0];
 313         $owner_uid = $r[0]['uid'];
 314         $contact_id = $r[0]['id'];
 315
 316
 317         if($type === 'reputation' && strlen($url)) {
 318                 $r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 319                         dbesc($url),
 320                         intval($owner_uid)
 321                 );
 322                 $reputation = 0;
 323                 $text = '';
 324
 325                 if(count($r)) {
 326                         $reputation = $r[0]['rating'];
 327                         $text = $r[0]['reason'];
 328
 329                         if($r[0]['id'] == $contact_id) {        // inquiring about own reputation not allowed
 330                                 $reputation = 0;
 331                                 $text = '';
 332                         }
 333                 }
 334
 335                 echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
 336                 <reputation>
 337                         <url>$url</url>
 338                         <rating>$reputation</rating>
 339                         <description>$text</description>
 340                 </reputation>
 341                 ";
 342                 killme();
 343                 // NOTREACHED
 344         }
 345         else {
 346
 347                 // Update the writable flag if it changed
 348                 logger('dfrn_poll: post request feed: ' . print_r($_POST,true),LOGGER_DATA);
 349                 if($dfrn_version >= 2.21) {
 350                         if($perm === 'rw')
 351                                 $writable = 1;
 352                         else
 353                                 $writable = 0;
 354
 355                         if($writable !=  $contact['writable']) {
 356                                 q("UPDATE `contact` SET `writable` = %d WHERE `id` = %d LIMIT 1",
 357                                         intval($writable),
 358                                         intval($contact_id)
 359                                 );
 360                         }
 361                 }
 362
 363                 header("Content-type: application/atom+xml");
 364                 $o = get_feed_for($a,$dfrn_id, $a->argv[1], $last_update, $direction);
 365                 echo $o;
 366                 killme();
 367
 368         }
 369 }
 370
 371 function dfrn_poll_content(&$a) {
 372
 373         $dfrn_id         = ((x($_GET,'dfrn_id'))         ? $_GET['dfrn_id']              : '');
 374         $type            = ((x($_GET,'type'))            ? $_GET['type']                 : 'data');
 375         $last_update     = ((x($_GET,'last_update'))     ? $_GET['last_update']          : '');
 376         $destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url']      : '');
 377         $sec             = ((x($_GET,'sec'))             ? $_GET['sec']                  : '');
 378         $dfrn_version    = ((x($_GET,'dfrn_version'))    ? (float) $_GET['dfrn_version'] : 2.0);
 379         $perm            = ((x($_GET,'perm'))            ? $_GET['perm']                 : 'r');
 380
 381         $direction = (-1);
 382         if(strpos($dfrn_id,':') == 1) {
 383                 $direction = intval(substr($dfrn_id,0,1));
 384                 $dfrn_id = substr($dfrn_id,2);
 385         }
 386
 387
 388         if($dfrn_id != '') {
 389                 // initial communication from external contact
 390                 $hash = random_string();
 391
 392                 $status = 0;
 393
 394                 $r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
 395
 396                 if($type !== 'profile') {
 397                         $r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
 398                                 VALUES( '%s', '%s', '%s', '%s', '%s' ) ",
 399                                 dbesc($hash),
 400                                 dbesc($dfrn_id),
 401                                 intval(time() + 60 ),
 402                                 dbesc($type),
 403                                 dbesc($last_update)
 404                         );
 405                 }
 406                 $sql_extra = '';
 407                 switch($direction) {
 408                         case (-1):
 409                                 if($type === 'profile')
 410                                         $sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id));
 411                                 else
 412                                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 413                                 $my_id = $dfrn_id;
 414                                 break;
 415                         case 0:
 416                                 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 417                                 $my_id = '1:' . $dfrn_id;
 418                                 break;
 419                         case 1:
 420                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 421                                 $my_id = '0:' . $dfrn_id;
 422                                 break;
 423                         default:
 424                                 goaway(z_root());
 425                                 break; // NOTREACHED
 426                 }
 427
 428                 $r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname`
 429                         FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 430                         WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
 431                         AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
 432                         dbesc($a->argv[1])
 433                 );
 434
 435                 if(count($r)) {
 436
 437                         $challenge = '';
 438                         $encrypted_id = '';
 439                         $id_str = $my_id . '.' . mt_rand(1000,9999);
 440
 441                         if($r[0]['duplex'] && strlen($r[0]['pubkey'])) {
 442                                 openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
 443                                 openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
 444                         }
 445                         else {
 446                                 openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
 447                                 openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
 448                         }
 449
 450                         $challenge = bin2hex($challenge);
 451                         $encrypted_id = bin2hex($encrypted_id);
 452                 }
 453                 else {
 454                         $status = 1;
 455                         $challenge = '';
 456                         $encrypted_id = '';
 457                 }
 458
 459                 if(($type === 'profile') && (strlen($sec))) {
 460
 461                         // URL reply
 462
 463                         if($dfrn_version < 2.2) {
 464                                 $s = fetch_url($r[0]['poll']
 465                                         . '?dfrn_id=' . $encrypted_id
 466                                         . '&type=profile-check'
 467                                         . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 468                                         . '&challenge=' . $challenge
 469                                         . '&sec=' . $sec
 470                                 );
 471                         }
 472                         else {
 473                                 $s = post_url($r[0]['poll'], array(
 474                                         'dfrn_id' => $encrypted_id,
 475                                         'type' => 'profile-check',
 476                                         'dfrn_version' => DFRN_PROTOCOL_VERSION,
 477                                         'challenge' => $challenge,
 478                                         'sec' => $sec
 479                                 ));
 480                         }
 481
 482                         $profile = $r[0]['nickname'];
 483
 484                         switch($destination_url) {
 485                                 case 'profile':
 486                                         $dest = $a->get_baseurl() . '/profile/' . $profile . '?tab=profile';
 487                                         break;
 488                                 case 'photos':
 489                                         $dest = $a->get_baseurl() . '/photos/' . $profile;
 490                                         break;
 491                                 case 'status':
 492                                 case '':
 493                                         $dest = $a->get_baseurl() . '/profile/' . $profile;
 494                                         break;
 495                                 default:
 496                                         $dest = $destination_url;
 497                                         break;
 498                         }
 499
 500                         logger("dfrn_poll: sec profile: " . $s, LOGGER_DATA);
 501
 502                         if(strlen($s) && strstr($s,'<?xml')) {
 503
 504                                 $xml = parse_xml_string($s);
 505
 506                                 logger('dfrn_poll: profile: parsed xml: ' . print_r($xml,true), LOGGER_DATA);
 507
 508                                 logger('dfrn_poll: secure profile: challenge: ' . $xml->challenge . ' expecting ' . $hash);
 509                                 logger('dfrn_poll: secure profile: sec: ' . $xml->sec . ' expecting ' . $sec);
 510
 511
 512                                 if(((int) $xml->status == 0) && ($xml->challenge == $hash)  && ($xml->sec == $sec)) {
 513                                         $_SESSION['authenticated'] = 1;
 514                                         $_SESSION['visitor_id'] = $r[0]['id'];
 515                                         $_SESSION['visitor_home'] = $r[0]['url'];
 516                                         $_SESSION['visitor_visiting'] = $r[0]['uid'];
 517                                         info( sprintf(t('%s welcomes %s'), $r[0]['username'] , $r[0]['name']) . EOL);
 518                                         // Visitors get 1 day session.
 519                                         $session_id = session_id();
 520                                         $expire = time() + 86400;
 521                                         q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1",
 522                                                 dbesc($expire),
 523                                                 dbesc($session_id)
 524                                         );
 525                                 }
 526
 527                                 goaway($dest);
 528                         }
 529                         goaway($dest);
 530                         // NOTREACHED
 531
 532                 }
 533                 else {
 534                         // XML reply
 535                         header("Content-type: text/xml");
 536                         echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
 537                                 . '<dfrn_poll>' . "\r\n"
 538                                 . "\t" . '<status>' . $status . '</status>' . "\r\n"
 539                                 . "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n"
 540                                 . "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n"
 541                                 . "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
 542                                 . '</dfrn_poll>' . "\r\n" ;
 543                         killme();
 544                         // NOTREACHED
 545                 }
 546         }
 547 }
 548
 549