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