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