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