mod/dfrn_confirm.php

   1 <?php
   2
   3 /**
   4  * @file mod/dfrn_confirm.php
   5  * @brief Module: dfrn_confirm
   6  * Purpose: Friendship acceptance for DFRN contacts
   7  *.
   8  * There are two possible entry points and three scenarios.
   9  *.
  10  *   1. A form was submitted by our user approving a friendship that originated elsewhere.
  11  *      This may also be called from dfrn_request to automatically approve a friendship.
  12  *
  13  *   2. We may be the target or other side of the conversation to scenario 1, and will
  14  *      interact with that process on our own user's behalf.
  15  *.
  16  *  @see PDF with dfrn specs: https://github.com/friendica/friendica/blob/master/spec/dfrn2.pdf
  17  *    You also find a graphic which describes the confirmation process at
  18  *    https://github.com/friendica/friendica/blob/master/spec/dfrn2_contact_confirmation.png
  19  */
  20
  21 use Friendica\App;
  22 use Friendica\Core\Config;
  23 use Friendica\Core\PConfig;
  24 use Friendica\Core\System;
  25 use Friendica\Core\Worker;
  26 use Friendica\Database\DBM;
  27 use Friendica\Model\Contact;
  28 use Friendica\Model\Group;
  29 use Friendica\Model\User;
  30 use Friendica\Network\Probe;
  31 use Friendica\Protocol\Diaspora;
  32
  33 require_once 'include/enotify.php';
  34
  35 function dfrn_confirm_post(App $a, $handsfree = null) {
  36
  37         if(is_array($handsfree)) {
  38
  39                 /*
  40                  * We were called directly from dfrn_request due to automatic friend acceptance.
  41                  * Any $_POST parameters we may require are supplied in the $handsfree array.
  42                  *
  43                  */
  44
  45                 $node = $handsfree['node'];
  46                 $a->interactive = false; // notice() becomes a no-op since nobody is there to see it
  47
  48         }
  49         else {
  50                 if($a->argc > 1)
  51                         $node = $a->argv[1];
  52         }
  53
  54                 /*
  55                  *
  56                  * Main entry point. Scenario 1. Our user received a friend request notification (perhaps
  57                  * from another site) and clicked 'Approve'.
  58                  * $POST['source_url'] is not set. If it is, it indicates Scenario 2.
  59                  *
  60                  * We may also have been called directly from dfrn_request ($handsfree != null) due to
  61                  * this being a page type which supports automatic friend acceptance. That is also Scenario 1
  62                  * since we are operating on behalf of our registered user to approve a friendship.
  63                  *
  64                  */
  65
  66         if(! x($_POST,'source_url')) {
  67
  68                 $uid = ((is_array($handsfree)) ? $handsfree['uid'] : local_user());
  69
  70                 if(! $uid) {
  71                         notice( t('Permission denied.') . EOL );
  72                         return;
  73                 }
  74
  75                 $user = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
  76                         intval($uid)
  77                 );
  78
  79                 if(! $user) {
  80                         notice( t('Profile not found.') . EOL );
  81                         return;
  82                 }
  83
  84
  85                 // These data elements may come from either the friend request notification form or $handsfree array.
  86
  87                 if(is_array($handsfree)) {
  88                         logger('Confirm in handsfree mode');
  89                         $dfrn_id   = $handsfree['dfrn_id'];
  90                         $intro_id  = $handsfree['intro_id'];
  91                         $duplex    = $handsfree['duplex'];
  92                         $hidden    = ((array_key_exists('hidden',$handsfree)) ? intval($handsfree['hidden']) : 0 );
  93                         $activity  = ((array_key_exists('activity',$handsfree)) ? intval($handsfree['activity']) : 0 );
  94                 }
  95                 else {
  96                         $dfrn_id  = ((x($_POST,'dfrn_id'))    ? notags(trim($_POST['dfrn_id'])) : "");
  97                         $intro_id = ((x($_POST,'intro_id'))   ? intval($_POST['intro_id'])      : 0 );
  98                         $duplex   = ((x($_POST,'duplex'))     ? intval($_POST['duplex'])        : 0 );
  99                         $cid      = ((x($_POST,'contact_id')) ? intval($_POST['contact_id'])    : 0 );
 100                         $hidden   = ((x($_POST,'hidden'))     ? intval($_POST['hidden'])        : 0 );
 101                         $activity = ((x($_POST,'activity'))   ? intval($_POST['activity'])      : 0 );
 102                 }
 103
 104                 /*
 105                  *
 106                  * Ensure that dfrn_id has precedence when we go to find the contact record.
 107                  * We only want to search based on contact id if there is no dfrn_id,
 108                  * e.g. for OStatus network followers.
 109                  *
 110                  */
 111
 112                 if(strlen($dfrn_id))
 113                         $cid = 0;
 114
 115                 logger('Confirming request for dfrn_id (issued) ' . $dfrn_id);
 116                 if($cid)
 117                         logger('Confirming follower with contact_id: ' . $cid);
 118
 119
 120                 /*
 121                  *
 122                  * The other person will have been issued an ID when they first requested friendship.
 123                  * Locate their record. At this time, their record will have both pending and blocked set to 1.
 124                  * There won't be any dfrn_id if this is a network follower, so use the contact_id instead.
 125                  *
 126                  */
 127
 128                 $r = q("SELECT * FROM `contact` WHERE ( ( `issued-id` != '' AND `issued-id` = '%s' ) OR ( `id` = %d AND `id` != 0 ) ) AND `uid` = %d AND `duplex` = 0 LIMIT 1",
 129                         dbesc($dfrn_id),
 130                         intval($cid),
 131                         intval($uid)
 132                 );
 133
 134                 if (! DBM::is_result($r)) {
 135                         logger('Contact not found in DB.');
 136                         notice( t('Contact not found.') . EOL );
 137                         notice( t('This may occasionally happen if contact was requested by both persons and it has already been approved.') . EOL );
 138                         return;
 139                 }
 140
 141                 $contact = $r[0];
 142
 143                 $contact_id   = $contact['id'];
 144                 $relation     = $contact['rel'];
 145                 $site_pubkey  = $contact['site-pubkey'];
 146                 $dfrn_confirm = $contact['confirm'];
 147                 $aes_allow    = $contact['aes_allow'];
 148
 149                 $network = ((strlen($contact['issued-id'])) ? NETWORK_DFRN : NETWORK_OSTATUS);
 150
 151                 if($contact['network'])
 152                         $network = $contact['network'];
 153
 154                 if($network === NETWORK_DFRN) {
 155
 156                         /*
 157                          *
 158                          * Generate a key pair for all further communications with this person.
 159                          * We have a keypair for every contact, and a site key for unknown people.
 160                          * This provides a means to carry on relationships with other people if
 161                          * any single key is compromised. It is a robust key. We're much more
 162                          * worried about key leakage than anybody cracking it.
 163                          *
 164                          */
 165                         require_once 'include/crypto.php';
 166
 167                         $res = new_keypair(4096);
 168
 169
 170                         $private_key = $res['prvkey'];
 171                         $public_key  = $res['pubkey'];
 172
 173                         // Save the private key. Send them the public key.
 174
 175                         $r = q("UPDATE `contact` SET `prvkey` = '%s' WHERE `id` = %d AND `uid` = %d",
 176                                 dbesc($private_key),
 177                                 intval($contact_id),
 178                                 intval($uid)
 179                         );
 180
 181                         $params = array();
 182
 183                         /*
 184                          *
 185                          * Per the DFRN protocol, we will verify both ends by encrypting the dfrn_id with our
 186                          * site private key (person on the other end can decrypt it with our site public key).
 187                          * Then encrypt our profile URL with the other person's site public key. They can decrypt
 188                          * it with their site private key. If the decryption on the other end fails for either
 189                          * item, it indicates tampering or key failure on at least one site and we will not be
 190                          * able to provide a secure communication pathway.
 191                          *
 192                          * If other site is willing to accept full encryption, (aes_allow is 1 AND we have php5.3
 193                          * or later) then we encrypt the personal public key we send them using AES-256-CBC and a
 194                          * random key which is encrypted with their site public key.
 195                          *
 196                          */
 197
 198                         $src_aes_key = openssl_random_pseudo_bytes(64);
 199
 200                         $result = '';
 201                         openssl_private_encrypt($dfrn_id, $result, $user[0]['prvkey']);
 202
 203                         $params['dfrn_id'] = bin2hex($result);
 204                         $params['public_key'] = $public_key;
 205
 206
 207                         $my_url = System::baseUrl() . '/profile/' . $user[0]['nickname'];
 208
 209                         openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
 210                         $params['source_url'] = bin2hex($params['source_url']);
 211
 212                         if($aes_allow && function_exists('openssl_encrypt')) {
 213                                 openssl_public_encrypt($src_aes_key, $params['aes_key'], $site_pubkey);
 214                                 $params['aes_key'] = bin2hex($params['aes_key']);
 215                                 $params['public_key'] = bin2hex(openssl_encrypt($public_key,'AES-256-CBC',$src_aes_key));
 216                         }
 217
 218                         $params['dfrn_version'] = DFRN_PROTOCOL_VERSION ;
 219                         if($duplex == 1)
 220                                 $params['duplex'] = 1;
 221
 222                         if($user[0]['page-flags'] == PAGE_COMMUNITY)
 223                                 $params['page'] = 1;
 224                         if($user[0]['page-flags'] == PAGE_PRVGROUP)
 225                                 $params['page'] = 2;
 226
 227                         logger('Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params,true), LOGGER_DATA);
 228
 229                         /*
 230                          *
 231                          * POST all this stuff to the other site.
 232                          * Temporarily raise the network timeout to 120 seconds because the default 60
 233                          * doesn't always give the other side quite enough time to decrypt everything.
 234                          *
 235                          */
 236
 237                         $res = post_url($dfrn_confirm, $params, null, $redirects, 120);
 238
 239                         logger(' Confirm: received data: ' . $res, LOGGER_DATA);
 240
 241                         // Now figure out what they responded. Try to be robust if the remote site is
 242                         // having difficulty and throwing up errors of some kind.
 243
 244                         $leading_junk = substr($res,0,strpos($res,'<?xml'));
 245
 246                         $res = substr($res,strpos($res,'<?xml'));
 247                         if(! strlen($res)) {
 248
 249                                         // No XML at all, this exchange is messed up really bad.
 250                                         // We shouldn't proceed, because the xml parser might choke,
 251                                         // and $status is going to be zero, which indicates success.
 252                                         // We can hardly call this a success.
 253
 254                                 notice( t('Response from remote site was not understood.') . EOL);
 255                                 return;
 256                         }
 257
 258                         if(strlen($leading_junk) && Config::get('system','debugging')) {
 259
 260                                         // This might be more common. Mixed error text and some XML.
 261                                         // If we're configured for debugging, show the text. Proceed in either case.
 262
 263                                 notice( t('Unexpected response from remote site: ') . EOL . $leading_junk . EOL );
 264                         }
 265
 266                         if(stristr($res, "<status")===false) {
 267                                 // wrong xml! stop here!
 268                                 notice( t('Unexpected response from remote site: ') . EOL . htmlspecialchars($res) . EOL );
 269                                 return;
 270                         }
 271
 272                         $xml = parse_xml_string($res);
 273                         $status = (int) $xml->status;
 274                         $message = unxmlify($xml->message);   // human readable text of what may have gone wrong.
 275                         switch($status) {
 276                                 case 0:
 277                                         info( t("Confirmation completed successfully.") . EOL);
 278                                         if(strlen($message))
 279                                                 notice( t('Remote site reported: ') . $message . EOL);
 280                                         break;
 281                                 case 1:
 282                                         // birthday paradox - generate new dfrn-id and fall through.
 283                                         $new_dfrn_id = random_string();
 284                                         $r = q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d",
 285                                                 dbesc($new_dfrn_id),
 286                                                 intval($contact_id),
 287                                                 intval($uid)
 288                                         );
 289
 290                                 case 2:
 291                                         notice( t("Temporary failure. Please wait and try again.") . EOL);
 292                                         if(strlen($message))
 293                                                 notice( t('Remote site reported: ') . $message . EOL);
 294                                         break;
 295
 296
 297                                 case 3:
 298                                         notice( t("Introduction failed or was revoked.") . EOL);
 299                                         if(strlen($message))
 300                                                 notice( t('Remote site reported: ') . $message . EOL);
 301                                         break;
 302                                 }
 303
 304                         if(($status == 0) && ($intro_id)) {
 305
 306                                 // Success. Delete the notification.
 307
 308                                 $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d",
 309                                         intval($intro_id),
 310                                         intval($uid)
 311                                 );
 312
 313                         }
 314
 315                         if($status != 0)
 316                                 return;
 317                 }
 318
 319
 320                 /*
 321                  *
 322                  * We have now established a relationship with the other site.
 323                  * Let's make our own personal copy of their profile photo so we don't have
 324                  * to always load it from their site.
 325                  *
 326                  * We will also update the contact record with the nature and scope of the relationship.
 327                  *
 328                  */
 329
 330                 Contact::updateAvatar($contact['photo'], $uid, $contact_id);
 331
 332                 logger('dfrn_confirm: confirm - imported photos');
 333
 334                 if($network === NETWORK_DFRN) {
 335
 336                         $new_relation = CONTACT_IS_FOLLOWER;
 337                         if(($relation == CONTACT_IS_SHARING) || ($duplex))
 338                                 $new_relation = CONTACT_IS_FRIEND;
 339
 340                         if(($relation == CONTACT_IS_SHARING) && ($duplex))
 341                                 $duplex = 0;
 342
 343                         $r = q("UPDATE `contact` SET `rel` = %d,
 344                                 `name-date` = '%s',
 345                                 `uri-date` = '%s',
 346                                 `blocked` = 0,
 347                                 `pending` = 0,
 348                                 `duplex` = %d,
 349                                 `hidden` = %d,
 350                                 `network` = '%s' WHERE `id` = %d
 351                         ",
 352                                 intval($new_relation),
 353                                 dbesc(datetime_convert()),
 354                                 dbesc(datetime_convert()),
 355                                 intval($duplex),
 356                                 intval($hidden),
 357                                 dbesc(NETWORK_DFRN),
 358                                 intval($contact_id)
 359                         );
 360                 } else {
 361
 362                         // $network !== NETWORK_DFRN
 363
 364                         $network = (($contact['network']) ? $contact['network'] : NETWORK_OSTATUS);
 365                         $notify = (($contact['notify']) ? $contact['notify'] : '');
 366                         $poll   = (($contact['poll']) ? $contact['poll'] : '');
 367
 368                         $arr = Probe::uri($contact['url']);
 369                         if (empty($contact['notify'])) {
 370                                 $notify = $arr['notify'];
 371                         }
 372                         if (empty($contact['poll'])) {
 373                                 $poll = $arr['poll'];
 374                         }
 375
 376                         $addr = $arr['addr'];
 377
 378                         $new_relation = $contact['rel'];
 379                         $writable = $contact['writable'];
 380
 381                         if($network === NETWORK_DIASPORA) {
 382                                 if($duplex)
 383                                         $new_relation = CONTACT_IS_FRIEND;
 384                                 else
 385                                         $new_relation = CONTACT_IS_FOLLOWER;
 386
 387                                 if($new_relation != CONTACT_IS_FOLLOWER)
 388                                         $writable = 1;
 389                         }
 390
 391                         $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d",
 392                                 intval($intro_id),
 393                                 intval($uid)
 394                         );
 395
 396
 397                         $r = q("UPDATE `contact` SET `name-date` = '%s',
 398                                 `uri-date` = '%s',
 399                                 `addr` = '%s',
 400                                 `notify` = '%s',
 401                                 `poll` = '%s',
 402                                 `blocked` = 0,
 403                                 `pending` = 0,
 404                                 `network` = '%s',
 405                                 `writable` = %d,
 406                                 `hidden` = %d,
 407                                 `rel` = %d
 408                                 WHERE `id` = %d
 409                         ",
 410                                 dbesc(datetime_convert()),
 411                                 dbesc(datetime_convert()),
 412                                 dbesc($addr),
 413                                 dbesc($notify),
 414                                 dbesc($poll),
 415                                 dbesc($network),
 416                                 intval($writable),
 417                                 intval($hidden),
 418                                 intval($new_relation),
 419                                 intval($contact_id)
 420                         );
 421                 }
 422
 423                 /// @TODO is DBM::is_result() working here?
 424                 if ($r === false) {
 425                         notice( t('Unable to set contact photo.') . EOL);
 426                 }
 427
 428                 // reload contact info
 429
 430                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 431                         intval($contact_id)
 432                 );
 433                 if (DBM::is_result($r)) {
 434                         $contact = $r[0];
 435                 } else {
 436                         $contact = null;
 437                 }
 438
 439
 440                 if ((isset($new_relation) && $new_relation == CONTACT_IS_FRIEND)) {
 441
 442                         if (($contact) && ($contact['network'] === NETWORK_DIASPORA)) {
 443                                 $ret = Diaspora::sendShare($user[0],$r[0]);
 444                                 logger('share returns: ' . $ret);
 445                         }
 446
 447                         // Send a new friend post if we are allowed to...
 448
 449                         $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 450                                 intval($uid)
 451                         );
 452
 453                         if((DBM::is_result($r)) && ($r[0]['hide-friends'] == 0) && ($activity) && (! $hidden)) {
 454
 455                                 require_once 'include/items.php';
 456
 457                                 $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 458                                         intval($uid)
 459                                 );
 460
 461                                 if(count($self)) {
 462
 463                                         $arr = array();
 464                                         $arr['guid'] = get_guid(32);
 465                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $uid);
 466                                         $arr['uid'] = $uid;
 467                                         $arr['contact-id'] = $self[0]['id'];
 468                                         $arr['wall'] = 1;
 469                                         $arr['type'] = 'wall';
 470                                         $arr['gravity'] = 0;
 471                                         $arr['origin'] = 1;
 472                                         $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 473                                         $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 474                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 475
 476                                         $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 477                                         $APhoto = '[url=' . $self[0]['url'] . ']' . '[img]' . $self[0]['thumb'] . '[/img][/url]';
 478
 479                                         $B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
 480                                         $BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
 481
 482                                         $arr['verb'] = ACTIVITY_FRIEND;
 483                                         $arr['object-type'] = ACTIVITY_OBJ_PERSON;
 484                                         $arr['body'] =  sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$BPhoto;
 485
 486                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
 487                                                 . '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
 488                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
 489                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
 490                                         $arr['object'] .= '</link></object>' . "\n";
 491
 492                                         $arr['last-child'] = 1;
 493
 494                                         $arr['allow_cid'] = $user[0]['allow_cid'];
 495                                         $arr['allow_gid'] = $user[0]['allow_gid'];
 496                                         $arr['deny_cid']  = $user[0]['deny_cid'];
 497                                         $arr['deny_gid']  = $user[0]['deny_gid'];
 498
 499                                         $i = item_store($arr);
 500                                         if($i)
 501                                                 Worker::add(PRIORITY_HIGH, "Notifier", "activity", $i);
 502                                 }
 503                         }
 504                 }
 505
 506                 Group::addMember(User::getDefaultGroup($uid, $contact["network"]), $contact['id']);
 507
 508                 // Let's send our user to the contact editor in case they want to
 509                 // do anything special with this new friend.
 510                 if ($handsfree === null) {
 511                         goaway(System::baseUrl() . '/contacts/' . intval($contact_id));
 512                 } else {
 513                         return;
 514                 }
 515                 //NOTREACHED
 516         }
 517
 518         /*
 519          *
 520          *
 521          * End of Scenario 1. [Local confirmation of remote friend request].
 522          *
 523          * Begin Scenario 2. This is the remote response to the above scenario.
 524          * This will take place on the site that originally initiated the friend request.
 525          * In the section above where the confirming party makes a POST and
 526          * retrieves xml status information, they are communicating with the following code.
 527          *
 528          */
 529
 530         if (x($_POST,'source_url')) {
 531
 532                 // We are processing an external confirmation to an introduction created by our user.
 533
 534                 $public_key = ((x($_POST,'public_key'))   ? $_POST['public_key']           : '');
 535                 $dfrn_id    = ((x($_POST,'dfrn_id'))      ? hex2bin($_POST['dfrn_id'])     : '');
 536                 $source_url = ((x($_POST,'source_url'))   ? hex2bin($_POST['source_url'])  : '');
 537                 $aes_key    = ((x($_POST,'aes_key'))      ? $_POST['aes_key']              : '');
 538                 $duplex     = ((x($_POST,'duplex'))       ? intval($_POST['duplex'])       : 0 );
 539                 $page       = ((x($_POST,'page'))         ? intval($_POST['page'])         : 0 );
 540                 $version_id = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
 541
 542                 $forum = (($page == 1) ? 1 : 0);
 543                 $prv   = (($page == 2) ? 1 : 0);
 544
 545                 logger('dfrn_confirm: requestee contacted: ' . $node);
 546
 547                 logger('dfrn_confirm: request: POST=' . print_r($_POST,true), LOGGER_DATA);
 548
 549                 // If $aes_key is set, both of these items require unpacking from the hex transport encoding.
 550
 551                 if (x($aes_key)) {
 552                         $aes_key = hex2bin($aes_key);
 553                         $public_key = hex2bin($public_key);
 554                 }
 555
 556                 // Find our user's account
 557
 558                 $r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
 559                         dbesc($node));
 560
 561                 if (! DBM::is_result($r)) {
 562                         $message = sprintf(t('No user record found for \'%s\' '), $node);
 563                         xml_status(3,$message); // failure
 564                         // NOTREACHED
 565                 }
 566
 567                 $my_prvkey = $r[0]['prvkey'];
 568                 $local_uid = $r[0]['uid'];
 569
 570
 571                 if(! strstr($my_prvkey,'PRIVATE KEY')) {
 572                         $message = t('Our site encryption key is apparently messed up.');
 573                         xml_status(3,$message);
 574                 }
 575
 576                 // verify everything
 577
 578                 $decrypted_source_url = "";
 579                 openssl_private_decrypt($source_url,$decrypted_source_url,$my_prvkey);
 580
 581
 582                 if(! strlen($decrypted_source_url)) {
 583                         $message = t('Empty site URL was provided or URL could not be decrypted by us.');
 584                         xml_status(3,$message);
 585                         // NOTREACHED
 586                 }
 587
 588                 $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 589                         dbesc($decrypted_source_url),
 590                         intval($local_uid)
 591                 );
 592                 if (!DBM::is_result($ret)) {
 593                         if (strstr($decrypted_source_url,'http:')) {
 594                                 $newurl = str_replace('http:','https:',$decrypted_source_url);
 595                         } else {
 596                                 $newurl = str_replace('https:','http:',$decrypted_source_url);
 597                         }
 598
 599                         $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 600                                 dbesc($newurl),
 601                                 intval($local_uid)
 602                         );
 603                         if (!DBM::is_result($ret)) {
 604                                 // this is either a bogus confirmation (?) or we deleted the original introduction.
 605                                 $message = t('Contact record was not found for you on our site.');
 606                                 xml_status(3,$message);
 607                                 return; // NOTREACHED
 608                         }
 609                 }
 610
 611                 $relation = $ret[0]['rel'];
 612
 613                 // Decrypt all this stuff we just received
 614
 615                 $foreign_pubkey = $ret[0]['site-pubkey'];
 616                 $dfrn_record    = $ret[0]['id'];
 617
 618                 if (! $foreign_pubkey) {
 619                         $message = sprintf( t('Site public key not available in contact record for URL %s.'), $newurl);
 620                         xml_status(3,$message);
 621                 }
 622
 623                 $decrypted_dfrn_id = "";
 624                 openssl_public_decrypt($dfrn_id,$decrypted_dfrn_id,$foreign_pubkey);
 625
 626                 if (strlen($aes_key)) {
 627                         $decrypted_aes_key = "";
 628                         openssl_private_decrypt($aes_key,$decrypted_aes_key,$my_prvkey);
 629                         $dfrn_pubkey = openssl_decrypt($public_key,'AES-256-CBC',$decrypted_aes_key);
 630                 }
 631                 else {
 632                         $dfrn_pubkey = $public_key;
 633                 }
 634
 635                 $r = q("SELECT * FROM `contact` WHERE `dfrn-id` = '%s' LIMIT 1",
 636                         dbesc($decrypted_dfrn_id)
 637                 );
 638                 if (DBM::is_result($r)) {
 639                         $message = t('The ID provided by your system is a duplicate on our system. It should work if you try again.');
 640                         xml_status(1,$message); // Birthday paradox - duplicate dfrn-id
 641                         // NOTREACHED
 642                 }
 643
 644                 $r = q("UPDATE `contact` SET `dfrn-id` = '%s', `pubkey` = '%s' WHERE `id` = %d",
 645                         dbesc($decrypted_dfrn_id),
 646                         dbesc($dfrn_pubkey),
 647                         intval($dfrn_record)
 648                 );
 649                 if (! DBM::is_result($r)) {
 650                         $message = t('Unable to set your contact credentials on our system.');
 651                         xml_status(3,$message);
 652                 }
 653
 654                 // It's possible that the other person also requested friendship.
 655                 // If it is a duplex relationship, ditch the issued-id if one exists.
 656
 657                 if($duplex) {
 658                         $r = q("UPDATE `contact` SET `issued-id` = '' WHERE `id` = %d",
 659                                 intval($dfrn_record)
 660                         );
 661                 }
 662
 663                 // We're good but now we have to scrape the profile photo and send notifications.
 664
 665
 666
 667                 $r = q("SELECT `photo` FROM `contact` WHERE `id` = %d LIMIT 1",
 668                         intval($dfrn_record));
 669
 670                 if (DBM::is_result($r)) {
 671                         $photo = $r[0]['photo'];
 672                 } else {
 673                         $photo = System::baseUrl() . '/images/person-175.jpg';
 674                 }
 675
 676                 Contact::updateAvatar($photo,$local_uid,$dfrn_record);
 677
 678                 logger('dfrn_confirm: request - photos imported');
 679
 680                 $new_relation = CONTACT_IS_SHARING;
 681                 if (($relation == CONTACT_IS_FOLLOWER) || ($duplex)) {
 682                         $new_relation = CONTACT_IS_FRIEND;
 683                 }
 684
 685                 if (($relation == CONTACT_IS_FOLLOWER) && ($duplex)) {
 686                         $duplex = 0;
 687                 }
 688
 689                 $r = q("UPDATE `contact` SET
 690                         `rel` = %d,
 691                         `name-date` = '%s',
 692                         `uri-date` = '%s',
 693                         `blocked` = 0,
 694                         `pending` = 0,
 695                         `duplex` = %d,
 696                         `forum` = %d,
 697                         `prv` = %d,
 698                         `network` = '%s' WHERE `id` = %d
 699                 ",
 700                         intval($new_relation),
 701                         dbesc(datetime_convert()),
 702                         dbesc(datetime_convert()),
 703                         intval($duplex),
 704                         intval($forum),
 705                         intval($prv),
 706                         dbesc(NETWORK_DFRN),
 707                         intval($dfrn_record)
 708                 );
 709                 if ($r === false) {    // indicates schema is messed up or total db failure
 710                         $message = t('Unable to update your contact profile details on our system');
 711                         xml_status(3,$message);
 712                 }
 713
 714                 // Otherwise everything seems to have worked and we are almost done. Yay!
 715                 // Send an email notification
 716
 717                 logger('dfrn_confirm: request: info updated');
 718
 719                 $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 720                         WHERE `contact`.`id` = %d LIMIT 1",
 721                         intval($dfrn_record)
 722                 );
 723
 724                 if (DBM::is_result($r))
 725                         $combined = $r[0];
 726
 727                 if((DBM::is_result($r)) && ($r[0]['notify-flags'] & NOTIFY_CONFIRM)) {
 728                         $mutual = ($new_relation == CONTACT_IS_FRIEND);
 729                         notification(array(
 730                                 'type'         => NOTIFY_CONFIRM,
 731                                 'notify_flags' => $r[0]['notify-flags'],
 732                                 'language'     => $r[0]['language'],
 733                                 'to_name'      => $r[0]['username'],
 734                                 'to_email'     => $r[0]['email'],
 735                                 'uid'          => $r[0]['uid'],
 736                                 'link'             => System::baseUrl() . '/contacts/' . $dfrn_record,
 737                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
 738                                 'source_link'  => $r[0]['url'],
 739                                 'source_photo' => $r[0]['photo'],
 740                                 'verb'         => ($mutual?ACTIVITY_FRIEND:ACTIVITY_FOLLOW),
 741                                 'otype'        => 'intro'
 742                         ));
 743                 }
 744
 745                 // Send a new friend post if we are allowed to...
 746
 747                 if($page && intval(PConfig::get($local_uid,'system','post_joingroup'))) {
 748                         $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 749                                 intval($local_uid)
 750                         );
 751
 752                         if((DBM::is_result($r)) && ($r[0]['hide-friends'] == 0)) {
 753
 754                                 require_once 'include/items.php';
 755
 756                                 $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 757                                         intval($local_uid)
 758                                 );
 759
 760                                 if(count($self)) {
 761
 762                                         $arr = array();
 763                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $local_uid);
 764                                         $arr['uid'] = $local_uid;
 765                                         $arr['contact-id'] = $self[0]['id'];
 766                                         $arr['wall'] = 1;
 767                                         $arr['type'] = 'wall';
 768                                         $arr['gravity'] = 0;
 769                                         $arr['origin'] = 1;
 770                                         $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 771                                         $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 772                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 773
 774                                         $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 775                                         $APhoto = '[url=' . $self[0]['url'] . ']' . '[img]' . $self[0]['thumb'] . '[/img][/url]';
 776
 777                                         $B = '[url=' . $combined['url'] . ']' . $combined['name'] . '[/url]';
 778                                         $BPhoto = '[url=' . $combined['url'] . ']' . '[img]' . $combined['thumb'] . '[/img][/url]';
 779
 780                                         $arr['verb'] = ACTIVITY_JOIN;
 781                                         $arr['object-type'] = ACTIVITY_OBJ_GROUP;
 782                                         $arr['body'] =  sprintf( t('%1$s has joined %2$s'), $A, $B)."\n\n\n" .$BPhoto;
 783                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_GROUP . '</type><title>' . $combined['name'] . '</title>'
 784                                                 . '<id>' . $combined['url'] . '/' . $combined['name'] . '</id>';
 785                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $combined['url'] . '" />' . "\n");
 786                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $combined['thumb'] . '" />' . "\n");
 787                                         $arr['object'] .= '</link></object>' . "\n";
 788
 789                                         $arr['last-child'] = 1;
 790
 791                                         $arr['allow_cid'] = $user[0]['allow_cid'];
 792                                         $arr['allow_gid'] = $user[0]['allow_gid'];
 793                                         $arr['deny_cid']  = $user[0]['deny_cid'];
 794                                         $arr['deny_gid']  = $user[0]['deny_gid'];
 795
 796                                         $i = item_store($arr);
 797                                         if($i)
 798                                                 Worker::add(PRIORITY_HIGH, "Notifier", "activity", $i);
 799
 800                                 }
 801                         }
 802                 }
 803                 xml_status(0); // Success
 804                 return; // NOTREACHED
 805
 806                         ////////////////////// End of this scenario ///////////////////////////////////////////////
 807         }
 808
 809         // somebody arrived here by mistake or they are fishing. Send them to the homepage.
 810
 811         goaway(System::baseUrl());
 812         // NOTREACHED
 813
 814 }