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'))) {
  30                 if((get_config('system','block_public')) && (! local_user()) && (! remote_user())) {
  31                         killme();
  32                 }
  33
  34                 $user = '';
  35                 if($a->argc > 1) {
  36                         $r = q("SELECT `hidewall`,`nickname` FROM `user` WHERE `user`.`nickname` = '%s' LIMIT 1",
  37                                 dbesc($a->argv[1])
  38                         );
  39                         if((! count($r)) || (count($r) && $r[0]['hidewall']))
  40                                 killme();
  41                         $user = $r[0]['nickname'];
  42                 }
  43
  44                 logger('dfrn_poll: public feed request from ' . $_SERVER['REMOTE_ADDR'] . ' for ' . $user);
  45                 header("Content-type: application/atom+xml");
  46                 echo get_feed_for($a, '', $user,$last_update);
  47                 killme();
  48         }
  49
  50         if(($type === 'profile') && (! strlen($sec))) {
  51
  52                 $sql_extra = '';
  53                 switch($direction) {
  54                         case (-1):
  55                                 $sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id));
  56                                 $my_id = $dfrn_id;
  57                                 break;
  58                         case 0:
  59                                 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  60                                 $my_id = '1:' . $dfrn_id;
  61                                 break;
  62                         case 1:
  63                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  64                                 $my_id = '0:' . $dfrn_id;
  65                                 break;
  66                         default:
  67                                 goaway(z_root());
  68                                 break; // NOTREACHED
  69                 }
  70
  71                 $r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname`
  72                         FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
  73                         WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
  74                         AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
  75                         dbesc($a->argv[1])
  76                 );
  77
  78                 if(count($r)) {
  79
  80                         $s = fetch_url($r[0]['poll'] . '?dfrn_id=' . $my_id . '&type=profile-check');
  81
  82                         logger("dfrn_poll: old profile returns " . $s, LOGGER_DATA);
  83
  84                         if(strlen($s)) {
  85
  86                                 $xml = parse_xml_string($s);
  87
  88                                 if((int) $xml->status == 1) {
  89                                         $_SESSION['authenticated'] = 1;
  90                                         $_SESSION['visitor_id'] = $r[0]['id'];
  91                                         $_SESSION['visitor_home'] = $r[0]['url'];
  92                                         $_SESSION['visitor_handle'] = $r[0]['addr'];
  93                                         $_SESSION['visitor_visiting'] = $r[0]['uid'];
  94                                         info( sprintf(t('%s welcomes %s'), $r[0]['username'] , $r[0]['name']) . EOL);
  95                                         // Visitors get 1 day session.
  96                                         $session_id = session_id();
  97                                         $expire = time() + 86400;
  98                                         q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1",
  99                                                 dbesc($expire),
 100                                                 dbesc($session_id)
 101                                         );
 102                                 }
 103                         }
 104                         $profile = $r[0]['nickname'];
 105                         goaway((strlen($destination_url)) ? $destination_url : $a->get_baseurl() . '/profile/' . $profile);
 106                 }
 107                 goaway(z_root());
 108
 109         }
 110
 111         if($type === 'profile-check' && $dfrn_version < 2.2 ) {
 112
 113                 if((strlen($challenge)) && (strlen($sec))) {
 114
 115                         q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 116                         $r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
 117                                 dbesc($sec)
 118                         );
 119                         if(! count($r)) {
 120                                 xml_status(3, 'No ticket');
 121                                 // NOTREACHED
 122                         }
 123                         $orig_id = $r[0]['dfrn_id'];
 124                         if(strpos($orig_id, ':'))
 125                                 $orig_id = substr($orig_id,2);
 126
 127                         $c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 128                                 intval($r[0]['cid'])
 129                         );
 130                         if(! count($c)) {
 131                                 xml_status(3, 'No profile');
 132                         }
 133                         $contact = $c[0];
 134
 135                         $sent_dfrn_id = hex2bin($dfrn_id);
 136                         $challenge    = hex2bin($challenge);
 137
 138                         $final_dfrn_id = '';
 139
 140                         if(($contact['duplex']) && strlen($contact['prvkey'])) {
 141                                 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
 142                                 openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']);
 143                         }
 144                         else {
 145                                 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
 146                                 openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']);
 147                         }
 148
 149                         $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 150
 151                         if(strpos($final_dfrn_id,':') == 1)
 152                                 $final_dfrn_id = substr($final_dfrn_id,2);
 153
 154                         if($final_dfrn_id != $orig_id) {
 155                                 logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
 156                                 // did not decode properly - cannot trust this site
 157                                 xml_status(3, 'Bad decryption');
 158                         }
 159
 160                         header("Content-type: text/xml");
 161                         echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
 162                         killme();
 163                         // NOTREACHED
 164                 }
 165                 else {
 166                                 // old protocol
 167
 168                         switch($direction) {
 169                                 case 1:
 170                                         $dfrn_id = '0:' . $dfrn_id;
 171                                         break;
 172                                 case 0:
 173                                         $dfrn_id = '1:' . $dfrn_id;
 174                                         break;
 175                                 default:
 176                                         break;
 177                         }
 178
 179
 180                         q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 181                         $r = q("SELECT * FROM `profile_check` WHERE `dfrn_id` = '%s' ORDER BY `expire` DESC",
 182                                 dbesc($dfrn_id));
 183                         if(count($r)) {
 184                                 xml_status(1);
 185                                 return; // NOTREACHED
 186                         }
 187                         xml_status(0);
 188                         return; // NOTREACHED
 189                 }
 190         }
 191
 192 }
 193
 194
 195
 196 function dfrn_poll_post(&$a) {
 197
 198         $dfrn_id      = ((x($_POST,'dfrn_id'))      ? $_POST['dfrn_id']              : '');
 199         $challenge    = ((x($_POST,'challenge'))    ? $_POST['challenge']            : '');
 200         $url          = ((x($_POST,'url'))          ? $_POST['url']                  : '');
 201         $sec          = ((x($_POST,'sec'))          ? $_POST['sec']                  : '');
 202         $ptype        = ((x($_POST,'type'))         ? $_POST['type']                 : '');
 203         $dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
 204         $perm         = ((x($_POST,'perm'))         ? $_POST['perm']                 : 'r');
 205
 206         if($ptype === 'profile-check') {
 207
 208                 if((strlen($challenge)) && (strlen($sec))) {
 209
 210                         logger('dfrn_poll: POST: profile-check');
 211
 212                         q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 213                         $r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
 214                                 dbesc($sec)
 215                         );
 216                         if(! count($r)) {
 217                                 xml_status(3, 'No ticket');
 218                                 // NOTREACHED
 219                         }
 220                         $orig_id = $r[0]['dfrn_id'];
 221                         if(strpos($orig_id, ':'))
 222                                 $orig_id = substr($orig_id,2);
 223
 224                         $c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 225                                 intval($r[0]['cid'])
 226                         );
 227                         if(! count($c)) {
 228                                 xml_status(3, 'No profile');
 229                         }
 230                         $contact = $c[0];
 231
 232                         $sent_dfrn_id = hex2bin($dfrn_id);
 233                         $challenge    = hex2bin($challenge);
 234
 235                         $final_dfrn_id = '';
 236
 237                         if(($contact['duplex']) && strlen($contact['prvkey'])) {
 238                                 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
 239                                 openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']);
 240                         }
 241                         else {
 242                                 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
 243                                 openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']);
 244                         }
 245
 246                         $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 247
 248                         if(strpos($final_dfrn_id,':') == 1)
 249                                 $final_dfrn_id = substr($final_dfrn_id,2);
 250
 251                         if($final_dfrn_id != $orig_id) {
 252                                 logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
 253                                 // did not decode properly - cannot trust this site
 254                                 xml_status(3, 'Bad decryption');
 255                         }
 256
 257                         header("Content-type: text/xml");
 258                         echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
 259                         killme();
 260                         // NOTREACHED
 261                 }
 262
 263         }
 264
 265         $direction    = (-1);
 266         if(strpos($dfrn_id,':') == 1) {
 267                 $direction = intval(substr($dfrn_id,0,1));
 268                 $dfrn_id   = substr($dfrn_id,2);
 269         }
 270
 271
 272         $r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
 273                 dbesc($dfrn_id),
 274                 dbesc($challenge)
 275         );
 276
 277         if(! count($r))
 278                 killme();
 279
 280         $type = $r[0]['type'];
 281         $last_update = $r[0]['last_update'];
 282
 283         $r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
 284                 dbesc($dfrn_id),
 285                 dbesc($challenge)
 286         );
 287
 288
 289         $sql_extra = '';
 290         switch($direction) {
 291                 case (-1):
 292                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 293                         $my_id = $dfrn_id;
 294                         break;
 295                 case 0:
 296                         $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 297                         $my_id = '1:' . $dfrn_id;
 298                         break;
 299                 case 1:
 300                         $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 301                         $my_id = '0:' . $dfrn_id;
 302                         break;
 303                 default:
 304                         goaway(z_root());
 305                         break; // NOTREACHED
 306         }
 307
 308
 309         $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 1");
 310
 311
 312         if(! count($r))
 313                 killme();
 314
 315         $contact = $r[0];
 316         $owner_uid = $r[0]['uid'];
 317         $contact_id = $r[0]['id'];
 318
 319
 320         if($type === 'reputation' && strlen($url)) {
 321                 $r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 322                         dbesc($url),
 323                         intval($owner_uid)
 324                 );
 325                 $reputation = 0;
 326                 $text = '';
 327
 328                 if(count($r)) {
 329                         $reputation = $r[0]['rating'];
 330                         $text = $r[0]['reason'];
 331
 332                         if($r[0]['id'] == $contact_id) {        // inquiring about own reputation not allowed
 333                                 $reputation = 0;
 334                                 $text = '';
 335                         }
 336                 }
 337
 338                 echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
 339                 <reputation>
 340                         <url>$url</url>
 341                         <rating>$reputation</rating>
 342                         <description>$text</description>
 343                 </reputation>
 344                 ";
 345                 killme();
 346                 // NOTREACHED
 347         }
 348         else {
 349
 350                 // Update the writable flag if it changed
 351                 logger('dfrn_poll: post request feed: ' . print_r($_POST,true),LOGGER_DATA);
 352                 if($dfrn_version >= 2.21) {
 353                         if($perm === 'rw')
 354                                 $writable = 1;
 355                         else
 356                                 $writable = 0;
 357
 358                         if($writable !=  $contact['writable']) {
 359                                 q("UPDATE `contact` SET `writable` = %d WHERE `id` = %d LIMIT 1",
 360                                         intval($writable),
 361                                         intval($contact_id)
 362                                 );
 363                         }
 364                 }
 365
 366                 header("Content-type: application/atom+xml");
 367                 $o = get_feed_for($a,$dfrn_id, $a->argv[1], $last_update, $direction);
 368                 echo $o;
 369                 killme();
 370
 371         }
 372 }
 373
 374 function dfrn_poll_content(&$a) {
 375
 376         $dfrn_id         = ((x($_GET,'dfrn_id'))         ? $_GET['dfrn_id']              : '');
 377         $type            = ((x($_GET,'type'))            ? $_GET['type']                 : 'data');
 378         $last_update     = ((x($_GET,'last_update'))     ? $_GET['last_update']          : '');
 379         $destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url']      : '');
 380         $sec             = ((x($_GET,'sec'))             ? $_GET['sec']                  : '');
 381         $dfrn_version    = ((x($_GET,'dfrn_version'))    ? (float) $_GET['dfrn_version'] : 2.0);
 382         $perm            = ((x($_GET,'perm'))            ? $_GET['perm']                 : 'r');
 383
 384         $direction = (-1);
 385         if(strpos($dfrn_id,':') == 1) {
 386                 $direction = intval(substr($dfrn_id,0,1));
 387                 $dfrn_id = substr($dfrn_id,2);
 388         }
 389
 390
 391         if($dfrn_id != '') {
 392                 // initial communication from external contact
 393                 $hash = random_string();
 394
 395                 $status = 0;
 396
 397                 $r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
 398
 399                 if($type !== 'profile') {
 400                         $r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
 401                                 VALUES( '%s', '%s', '%s', '%s', '%s' ) ",
 402                                 dbesc($hash),
 403                                 dbesc($dfrn_id),
 404                                 intval(time() + 60 ),
 405                                 dbesc($type),
 406                                 dbesc($last_update)
 407                         );
 408                 }
 409                 $sql_extra = '';
 410                 switch($direction) {
 411                         case (-1):
 412                                 if($type === 'profile')
 413                                         $sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id));
 414                                 else
 415                                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 416                                 $my_id = $dfrn_id;
 417                                 break;
 418                         case 0:
 419                                 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 420                                 $my_id = '1:' . $dfrn_id;
 421                                 break;
 422                         case 1:
 423                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 424                                 $my_id = '0:' . $dfrn_id;
 425                                 break;
 426                         default:
 427                                 goaway(z_root());
 428                                 break; // NOTREACHED
 429                 }
 430
 431                 $nickname = $a->argv[1];
 432
 433                 $r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname`
 434                         FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 435                         WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
 436                         AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
 437                         dbesc($nickname)
 438                 );
 439
 440                 if(count($r)) {
 441
 442                         $challenge = '';
 443                         $encrypted_id = '';
 444                         $id_str = $my_id . '.' . mt_rand(1000,9999);
 445
 446                         if(($r[0]['duplex'] && strlen($r[0]['pubkey'])) || (! strlen($r[0]['prvkey']))) {
 447                                 openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
 448                                 openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
 449                         }
 450                         else {
 451                                 openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
 452                                 openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
 453                         }
 454
 455                         $challenge = bin2hex($challenge);
 456                         $encrypted_id = bin2hex($encrypted_id);
 457                 }
 458                 else {
 459                         $status = 1;
 460                         $challenge = '';
 461                         $encrypted_id = '';
 462                 }
 463
 464                 if(($type === 'profile') && (strlen($sec))) {
 465
 466                         // URL reply
 467
 468                         if($dfrn_version < 2.2) {
 469                                 $s = fetch_url($r[0]['poll']
 470                                         . '?dfrn_id=' . $encrypted_id
 471                                         . '&type=profile-check'
 472                                         . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 473                                         . '&challenge=' . $challenge
 474                                         . '&sec=' . $sec
 475                                 );
 476                         }
 477                         else {
 478                                 $s = post_url($r[0]['poll'], array(
 479                                         'dfrn_id' => $encrypted_id,
 480                                         'type' => 'profile-check',
 481                                         'dfrn_version' => DFRN_PROTOCOL_VERSION,
 482                                         'challenge' => $challenge,
 483                                         'sec' => $sec
 484                                 ));
 485                         }
 486
 487                         $profile = ((count($r) && $r[0]['nickname']) ? $r[0]['nickname'] : $nickname);
 488
 489                         switch($destination_url) {
 490                                 case 'profile':
 491                                         $dest = $a->get_baseurl() . '/profile/' . $profile . '?tab=profile';
 492                                         break;
 493                                 case 'photos':
 494                                         $dest = $a->get_baseurl() . '/photos/' . $profile;
 495                                         break;
 496                                 case 'status':
 497                                 case '':
 498                                         $dest = $a->get_baseurl() . '/profile/' . $profile;
 499                                         break;
 500                                 default:
 501                                         $dest = $destination_url;
 502                                         break;
 503                         }
 504
 505                         logger("dfrn_poll: sec profile: " . $s, LOGGER_DATA);
 506
 507                         if(strlen($s) && strstr($s,'<?xml')) {
 508
 509                                 $xml = parse_xml_string($s);
 510
 511                                 logger('dfrn_poll: profile: parsed xml: ' . print_r($xml,true), LOGGER_DATA);
 512
 513                                 logger('dfrn_poll: secure profile: challenge: ' . $xml->challenge . ' expecting ' . $hash);
 514                                 logger('dfrn_poll: secure profile: sec: ' . $xml->sec . ' expecting ' . $sec);
 515
 516
 517                                 if(((int) $xml->status == 0) && ($xml->challenge == $hash)  && ($xml->sec == $sec)) {
 518                                         $_SESSION['authenticated'] = 1;
 519                                         $_SESSION['visitor_id'] = $r[0]['id'];
 520                                         $_SESSION['visitor_home'] = $r[0]['url'];
 521                                         $_SESSION['visitor_visiting'] = $r[0]['uid'];
 522                                         info( sprintf(t('%s welcomes %s'), $r[0]['username'] , $r[0]['name']) . EOL);
 523                                         // Visitors get 1 day session.
 524                                         $session_id = session_id();
 525                                         $expire = time() + 86400;
 526                                         q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1",
 527                                                 dbesc($expire),
 528                                                 dbesc($session_id)
 529                                         );
 530                                 }
 531
 532                                 goaway($dest);
 533                         }
 534                         goaway($dest);
 535                         // NOTREACHED
 536
 537                 }
 538                 else {
 539                         // XML reply
 540                         header("Content-type: text/xml");
 541                         echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
 542                                 . '<dfrn_poll>' . "\r\n"
 543                                 . "\t" . '<status>' . $status . '</status>' . "\r\n"
 544                                 . "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n"
 545                                 . "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n"
 546                                 . "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
 547                                 . '</dfrn_poll>' . "\r\n" ;
 548                         killme();
 549                         // NOTREACHED
 550                 }
 551         }
 552 }
 553
 554