mod/dfrn_confirm.php

   1 <?php
   2 /**
   3  * @file mod/dfrn_confirm.php
   4  * @brief Module: dfrn_confirm
   5  * Purpose: Friendship acceptance for DFRN contacts
   6  *
   7  * There are two possible entry points and three scenarios.
   8  *
   9  *   1. A form was submitted by our user approving a friendship that originated elsewhere.
  10  *      This may also be called from dfrn_request to automatically approve a friendship.
  11  *
  12  *   2. We may be the target or other side of the conversation to scenario 1, and will
  13  *      interact with that process on our own user's behalf.
  14  *
  15  *  @see PDF with dfrn specs: https://github.com/friendica/friendica/blob/master/spec/dfrn2.pdf
  16  *    You also find a graphic which describes the confirmation process at
  17  *    https://github.com/friendica/friendica/blob/master/spec/dfrn2_contact_confirmation.png
  18  */
  19
  20 use Friendica\App;
  21 use Friendica\Core\Config;
  22 use Friendica\Core\L10n;
  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 use Friendica\Util\Crypto;
  33 use Friendica\Util\Network;
  34
  35 require_once 'include/enotify.php';
  36 require_once 'include/items.php';
  37
  38 function dfrn_confirm_post(App $a, $handsfree = null)
  39 {
  40         $node = null;
  41         if (is_array($handsfree)) {
  42                 /*
  43                  * We were called directly from dfrn_request due to automatic friend acceptance.
  44                  * Any $_POST parameters we may require are supplied in the $handsfree array.
  45                  *
  46                  */
  47                 $node = $handsfree['node'];
  48                 $a->interactive = false; // notice() becomes a no-op since nobody is there to see it
  49         } elseif ($a->argc > 1) {
  50                 $node = $a->argv[1];
  51         }
  52
  53         /*
  54          * Main entry point. Scenario 1. Our user received a friend request notification (perhaps
  55          * from another site) and clicked 'Approve'.
  56          * $POST['source_url'] is not set. If it is, it indicates Scenario 2.
  57          *
  58          * We may also have been called directly from dfrn_request ($handsfree != null) due to
  59          * this being a page type which supports automatic friend acceptance. That is also Scenario 1
  60          * since we are operating on behalf of our registered user to approve a friendship.
  61          */
  62         if (!x($_POST, 'source_url')) {
  63                 $uid = defaults($handsfree, 'uid', local_user());
  64                 if (!$uid) {
  65                         notice(L10n::t('Permission denied.') . EOL);
  66                         return;
  67                 }
  68
  69                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
  70                 if (!DBM::is_result($user)) {
  71                         notice(L10n::t('Profile not found.') . EOL);
  72                         return;
  73                 }
  74
  75                 // These data elements may come from either the friend request notification form or $handsfree array.
  76                 if (is_array($handsfree)) {
  77                         logger('Confirm in handsfree mode');
  78                         $dfrn_id  = $handsfree['dfrn_id'];
  79                         $intro_id = $handsfree['intro_id'];
  80                         $duplex   = $handsfree['duplex'];
  81                         $cid      = 0;
  82                         $hidden   = intval(defaults($handsfree, 'hidden'  , 0));
  83                         $activity = intval(defaults($handsfree, 'activity', 0));
  84                 } else {
  85                         $dfrn_id  = notags(trim(defaults($_POST, 'dfrn_id'   , '')));
  86                         $intro_id =      intval(defaults($_POST, 'intro_id'  , 0));
  87                         $duplex   =      intval(defaults($_POST, 'duplex'    , 0));
  88                         $cid      =      intval(defaults($_POST, 'contact_id', 0));
  89                         $hidden   =      intval(defaults($_POST, 'hidden'    , 0));
  90                         $activity =      intval(defaults($_POST, 'activity'  , 0));
  91                 }
  92
  93                 /*
  94                  * Ensure that dfrn_id has precedence when we go to find the contact record.
  95                  * We only want to search based on contact id if there is no dfrn_id,
  96                  * e.g. for OStatus network followers.
  97                  */
  98                 if (strlen($dfrn_id)) {
  99                         $cid = 0;
 100                 }
 101
 102                 logger('Confirming request for dfrn_id (issued) ' . $dfrn_id);
 103                 if ($cid) {
 104                         logger('Confirming follower with contact_id: ' . $cid);
 105                 }
 106
 107                 /*
 108                  * The other person will have been issued an ID when they first requested friendship.
 109                  * Locate their record. At this time, their record will have both pending and blocked set to 1.
 110                  * There won't be any dfrn_id if this is a network follower, so use the contact_id instead.
 111                  */
 112                 $r = q("SELECT *
 113                         FROM `contact`
 114                         WHERE (
 115                                 (`issued-id` != '' AND `issued-id` = '%s')
 116                                 OR
 117                                 (`id` = %d AND `id` != 0)
 118                         )
 119                         AND `uid` = %d
 120                         AND `duplex` = 0
 121                         LIMIT 1",
 122                         dbesc($dfrn_id),
 123                         intval($cid),
 124                         intval($uid)
 125                 );
 126                 if (!DBM::is_result($r)) {
 127                         logger('Contact not found in DB.');
 128                         notice(L10n::t('Contact not found.') . EOL);
 129                         notice(L10n::t('This may occasionally happen if contact was requested by both persons and it has already been approved.') . EOL);
 130                         return;
 131                 }
 132
 133                 $contact = $r[0];
 134
 135                 $contact_id   = $contact['id'];
 136                 $relation     = $contact['rel'];
 137                 $site_pubkey  = $contact['site-pubkey'];
 138                 $dfrn_confirm = $contact['confirm'];
 139                 $aes_allow    = $contact['aes_allow'];
 140
 141                 $network = ((strlen($contact['issued-id'])) ? NETWORK_DFRN : NETWORK_OSTATUS);
 142
 143                 if ($contact['network']) {
 144                         $network = $contact['network'];
 145                 }
 146
 147                 if ($network === NETWORK_DFRN) {
 148                         /*
 149                          * Generate a key pair for all further communications with this person.
 150                          * We have a keypair for every contact, and a site key for unknown people.
 151                          * This provides a means to carry on relationships with other people if
 152                          * any single key is compromised. It is a robust key. We're much more
 153                          * worried about key leakage than anybody cracking it.
 154                          */
 155                         $res = Crypto::newKeypair(4096);
 156
 157                         $private_key = $res['prvkey'];
 158                         $public_key  = $res['pubkey'];
 159
 160                         // Save the private key. Send them the public key.
 161                         q("UPDATE `contact` SET `prvkey` = '%s' WHERE `id` = %d AND `uid` = %d",
 162                                 dbesc($private_key),
 163                                 intval($contact_id),
 164                                 intval($uid)
 165                         );
 166
 167                         $params = [];
 168
 169                         /*
 170                          * Per the DFRN protocol, we will verify both ends by encrypting the dfrn_id with our
 171                          * site private key (person on the other end can decrypt it with our site public key).
 172                          * Then encrypt our profile URL with the other person's site public key. They can decrypt
 173                          * it with their site private key. If the decryption on the other end fails for either
 174                          * item, it indicates tampering or key failure on at least one site and we will not be
 175                          * able to provide a secure communication pathway.
 176                          *
 177                          * If other site is willing to accept full encryption, (aes_allow is 1 AND we have php5.3
 178                          * or later) then we encrypt the personal public key we send them using AES-256-CBC and a
 179                          * random key which is encrypted with their site public key.
 180                          */
 181
 182                         $src_aes_key = openssl_random_pseudo_bytes(64);
 183
 184                         $result = '';
 185                         openssl_private_encrypt($dfrn_id, $result, $user['prvkey']);
 186
 187                         $params['dfrn_id'] = bin2hex($result);
 188                         $params['public_key'] = $public_key;
 189
 190                         $my_url = System::baseUrl() . '/profile/' . $user['nickname'];
 191
 192                         openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
 193                         $params['source_url'] = bin2hex($params['source_url']);
 194
 195                         if ($aes_allow && function_exists('openssl_encrypt')) {
 196                                 openssl_public_encrypt($src_aes_key, $params['aes_key'], $site_pubkey);
 197                                 $params['aes_key'] = bin2hex($params['aes_key']);
 198                                 $params['public_key'] = bin2hex(openssl_encrypt($public_key, 'AES-256-CBC', $src_aes_key));
 199                         }
 200
 201                         $params['dfrn_version'] = DFRN_PROTOCOL_VERSION;
 202                         if ($duplex == 1) {
 203                                 $params['duplex'] = 1;
 204                         }
 205
 206                         if ($user['page-flags'] == PAGE_COMMUNITY) {
 207                                 $params['page'] = 1;
 208                         }
 209
 210                         if ($user['page-flags'] == PAGE_PRVGROUP) {
 211                                 $params['page'] = 2;
 212                         }
 213
 214                         logger('Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params, true), LOGGER_DATA);
 215
 216                         /*
 217                          *
 218                          * POST all this stuff to the other site.
 219                          * Temporarily raise the network timeout to 120 seconds because the default 60
 220                          * doesn't always give the other side quite enough time to decrypt everything.
 221                          *
 222                          */
 223
 224                         $res = Network::postURL($dfrn_confirm, $params, null, $redirects, 120);
 225
 226                         logger(' Confirm: received data: ' . $res, LOGGER_DATA);
 227
 228                         // Now figure out what they responded. Try to be robust if the remote site is
 229                         // having difficulty and throwing up errors of some kind.
 230
 231                         $leading_junk = substr($res, 0, strpos($res, '<?xml'));
 232
 233                         $res = substr($res, strpos($res, '<?xml'));
 234                         if (!strlen($res)) {
 235                                 // No XML at all, this exchange is messed up really bad.
 236                                 // We shouldn't proceed, because the xml parser might choke,
 237                                 // and $status is going to be zero, which indicates success.
 238                                 // We can hardly call this a success.
 239                                 notice(L10n::t('Response from remote site was not understood.') . EOL);
 240                                 return;
 241                         }
 242
 243                         if (strlen($leading_junk) && Config::get('system', 'debugging')) {
 244                                 // This might be more common. Mixed error text and some XML.
 245                                 // If we're configured for debugging, show the text. Proceed in either case.
 246                                 notice(L10n::t('Unexpected response from remote site: ') . EOL . $leading_junk . EOL);
 247                         }
 248
 249                         if (stristr($res, "<status") === false) {
 250                                 // wrong xml! stop here!
 251                                 notice(L10n::t('Unexpected response from remote site: ') . EOL . htmlspecialchars($res) . EOL);
 252                                 return;
 253                         }
 254
 255                         $xml = parse_xml_string($res);
 256                         $status = (int) $xml->status;
 257                         $message = unxmlify($xml->message);   // human readable text of what may have gone wrong.
 258                         switch ($status) {
 259                                 case 0:
 260                                         info(L10n::t("Confirmation completed successfully.") . EOL);
 261                                         break;
 262                                 case 1:
 263                                         // birthday paradox - generate new dfrn-id and fall through.
 264                                         $new_dfrn_id = random_string();
 265                                         q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d",
 266                                                 dbesc($new_dfrn_id),
 267                                                 intval($contact_id),
 268                                                 intval($uid)
 269                                         );
 270
 271                                 case 2:
 272                                         notice(L10n::t("Temporary failure. Please wait and try again.") . EOL);
 273                                         break;
 274                                 case 3:
 275                                         notice(L10n::t("Introduction failed or was revoked.") . EOL);
 276                                         break;
 277                         }
 278
 279                         if (strlen($message)) {
 280                                 notice(L10n::t('Remote site reported: ') . $message . EOL);
 281                         }
 282
 283                         if (($status == 0) && ($intro_id)) {
 284                                 // Success. Delete the notification.
 285                                 q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d",
 286                                         intval($intro_id),
 287                                         intval($uid)
 288                                 );
 289                         }
 290
 291                         if ($status != 0) {
 292                                 return;
 293                         }
 294                 }
 295
 296                 /*
 297                  * We have now established a relationship with the other site.
 298                  * Let's make our own personal copy of their profile photo so we don't have
 299                  * to always load it from their site.
 300                  *
 301                  * We will also update the contact record with the nature and scope of the relationship.
 302                  */
 303                 Contact::updateAvatar($contact['photo'], $uid, $contact_id);
 304
 305                 logger('dfrn_confirm: confirm - imported photos');
 306
 307                 if ($network === NETWORK_DFRN) {
 308                         $new_relation = CONTACT_IS_FOLLOWER;
 309                         if (($relation == CONTACT_IS_SHARING) || ($duplex)) {
 310                                 $new_relation = CONTACT_IS_FRIEND;
 311                         }
 312
 313                         if (($relation == CONTACT_IS_SHARING) && ($duplex)) {
 314                                 $duplex = 0;
 315                         }
 316
 317                         $r = q("UPDATE `contact` SET `rel` = %d,
 318                                 `name-date` = '%s',
 319                                 `uri-date` = '%s',
 320                                 `blocked` = 0,
 321                                 `pending` = 0,
 322                                 `duplex` = %d,
 323                                 `hidden` = %d,
 324                                 `network` = '%s' WHERE `id` = %d
 325                         ",
 326                                 intval($new_relation),
 327                                 dbesc(datetime_convert()),
 328                                 dbesc(datetime_convert()),
 329                                 intval($duplex),
 330                                 intval($hidden),
 331                                 dbesc(NETWORK_DFRN),
 332                                 intval($contact_id)
 333                         );
 334                 } else {
 335                         // $network !== NETWORK_DFRN
 336                         $network = defaults($contact, 'network', NETWORK_OSTATUS);
 337
 338                         $arr = Probe::uri($contact['url']);
 339
 340                         $notify  = defaults($contact, 'notify' , $arr['notify']);
 341                         $poll    = defaults($contact, 'poll'   , $arr['poll']);
 342
 343                         $addr = $arr['addr'];
 344
 345                         $new_relation = $contact['rel'];
 346                         $writable = $contact['writable'];
 347
 348                         if ($network === NETWORK_DIASPORA) {
 349                                 if ($duplex) {
 350                                         $new_relation = CONTACT_IS_FRIEND;
 351                                 } else {
 352                                         $new_relation = CONTACT_IS_FOLLOWER;
 353                                 }
 354
 355                                 if ($new_relation != CONTACT_IS_FOLLOWER) {
 356                                         $writable = 1;
 357                                 }
 358                         }
 359
 360                         q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d",
 361                                 intval($intro_id),
 362                                 intval($uid)
 363                         );
 364
 365                         $r = q("UPDATE `contact` SET `name-date` = '%s',
 366                                 `uri-date` = '%s',
 367                                 `addr` = '%s',
 368                                 `notify` = '%s',
 369                                 `poll` = '%s',
 370                                 `blocked` = 0,
 371                                 `pending` = 0,
 372                                 `network` = '%s',
 373                                 `writable` = %d,
 374                                 `hidden` = %d,
 375                                 `rel` = %d
 376                                 WHERE `id` = %d
 377                         ",
 378                                 dbesc(datetime_convert()),
 379                                 dbesc(datetime_convert()),
 380                                 dbesc($addr),
 381                                 dbesc($notify),
 382                                 dbesc($poll),
 383                                 dbesc($network),
 384                                 intval($writable),
 385                                 intval($hidden),
 386                                 intval($new_relation),
 387                                 intval($contact_id)
 388                         );
 389                 }
 390
 391                 /// @TODO is DBM::is_result() working here?
 392                 if (!DBM::is_result($r)) {
 393                         notice(L10n::t('Unable to set contact photo.') . EOL);
 394                 }
 395
 396                 // reload contact info
 397                 $contact = dba::selectFirst('contact', [], ['id' => $contact_id]);
 398                 if ((isset($new_relation) && $new_relation == CONTACT_IS_FRIEND)) {
 399                         if (DBM::is_result($contact) && ($contact['network'] === NETWORK_DIASPORA)) {
 400                                 $ret = Diaspora::sendShare($user, $contact);
 401                                 logger('share returns: ' . $ret);
 402                         }
 403
 404                         // Send a new friend post if we are allowed to...
 405                         $profile = dba::selectFirst('profile', ['hide-friends'], ['is-default' => true, 'uid' => $uid]);
 406                         if (x($profile, 'hide-friends') === 0 && $activity && !$hidden) {
 407                                 $self = dba::selectFirst('contact', [], ['self' => true, 'uid' => $uid]);
 408                                 if (DBM::is_result($self)) {
 409                                         $arr = [];
 410                                         $arr['guid'] = get_guid(32);
 411                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $uid);
 412                                         $arr['uid'] = $uid;
 413                                         $arr['contact-id'] = $self['id'];
 414                                         $arr['wall'] = 1;
 415                                         $arr['type'] = 'wall';
 416                                         $arr['gravity'] = 0;
 417                                         $arr['origin'] = 1;
 418                                         $arr['author-name']   = $arr['owner-name']   = $self['name'];
 419                                         $arr['author-link']   = $arr['owner-link']   = $self['url'];
 420                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self['thumb'];
 421
 422                                         $A = '[url=' . $self['url'] . ']' . $self['name'] . '[/url]';
 423                                         $B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
 424                                         $BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
 425
 426                                         $arr['verb'] = ACTIVITY_FRIEND;
 427                                         $arr['object-type'] = ACTIVITY_OBJ_PERSON;
 428                                         $arr['body'] = L10n::t('%1$s is now friends with %2$s', $A, $B) . "\n\n\n" . $BPhoto;
 429
 430                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
 431                                                 . '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
 432                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
 433                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
 434                                         $arr['object'] .= '</link></object>' . "\n";
 435
 436                                         $arr['allow_cid'] = $user['allow_cid'];
 437                                         $arr['allow_gid'] = $user['allow_gid'];
 438                                         $arr['deny_cid']  = $user['deny_cid'];
 439                                         $arr['deny_gid']  = $user['deny_gid'];
 440
 441                                         $i = item_store($arr);
 442                                         if ($i) {
 443                                                 Worker::add(PRIORITY_HIGH, "Notifier", "activity", $i);
 444                                         }
 445                                 }
 446                         }
 447                 }
 448
 449                 Group::addMember(User::getDefaultGroup($uid, $contact["network"]), $contact['id']);
 450
 451                 // Let's send our user to the contact editor in case they want to
 452                 // do anything special with this new friend.
 453                 if ($handsfree === null) {
 454                         goaway(System::baseUrl() . '/contacts/' . intval($contact_id));
 455                 } else {
 456                         return;
 457                 }
 458                 //NOTREACHED
 459         }
 460
 461         /*
 462          * End of Scenario 1. [Local confirmation of remote friend request].
 463          *
 464          * Begin Scenario 2. This is the remote response to the above scenario.
 465          * This will take place on the site that originally initiated the friend request.
 466          * In the section above where the confirming party makes a POST and
 467          * retrieves xml status information, they are communicating with the following code.
 468          */
 469         if (x($_POST, 'source_url')) {
 470                 // We are processing an external confirmation to an introduction created by our user.
 471                 $public_key =         defaults($_POST, 'public_key', '');
 472                 $dfrn_id    = hex2bin(defaults($_POST, 'dfrn_id'   , ''));
 473                 $source_url = hex2bin(defaults($_POST, 'source_url', ''));
 474                 $aes_key    =         defaults($_POST, 'aes_key'   , '');
 475                 $duplex     =  intval(defaults($_POST, 'duplex'    , 0));
 476                 $page       =  intval(defaults($_POST, 'page'      , 0));
 477
 478                 $forum = (($page == 1) ? 1 : 0);
 479                 $prv   = (($page == 2) ? 1 : 0);
 480
 481                 logger('dfrn_confirm: requestee contacted: ' . $node);
 482
 483                 logger('dfrn_confirm: request: POST=' . print_r($_POST, true), LOGGER_DATA);
 484
 485                 // If $aes_key is set, both of these items require unpacking from the hex transport encoding.
 486
 487                 if (x($aes_key)) {
 488                         $aes_key = hex2bin($aes_key);
 489                         $public_key = hex2bin($public_key);
 490                 }
 491
 492                 // Find our user's account
 493                 $user = dba::selectFirst('user', [], ['nickname' => $node]);
 494                 if (!DBM::is_result($user)) {
 495                         $message = L10n::t('No user record found for \'%s\' ', $node);
 496                         xml_status(3, $message); // failure
 497                         // NOTREACHED
 498                 }
 499
 500                 $my_prvkey = $user['prvkey'];
 501                 $local_uid = $user['uid'];
 502
 503
 504                 if (!strstr($my_prvkey, 'PRIVATE KEY')) {
 505                         $message = L10n::t('Our site encryption key is apparently messed up.');
 506                         xml_status(3, $message);
 507                 }
 508
 509                 // verify everything
 510
 511                 $decrypted_source_url = "";
 512                 openssl_private_decrypt($source_url, $decrypted_source_url, $my_prvkey);
 513
 514
 515                 if (!strlen($decrypted_source_url)) {
 516                         $message = L10n::t('Empty site URL was provided or URL could not be decrypted by us.');
 517                         xml_status(3, $message);
 518                         // NOTREACHED
 519                 }
 520
 521                 $contact = dba::selectFirst('contact', [], ['url' => $decrypted_source_url, 'uid' => $local_uid]);
 522                 if (!DBM::is_result($contact)) {
 523                         if (strstr($decrypted_source_url, 'http:')) {
 524                                 $newurl = str_replace('http:', 'https:', $decrypted_source_url);
 525                         } else {
 526                                 $newurl = str_replace('https:', 'http:', $decrypted_source_url);
 527                         }
 528
 529                         $contact = dba::selectFirst('contact', [], ['url' => $newurl, 'uid' => $local_uid]);
 530                         if (!DBM::is_result($contact)) {
 531                                 // this is either a bogus confirmation (?) or we deleted the original introduction.
 532                                 $message = L10n::t('Contact record was not found for you on our site.');
 533                                 xml_status(3, $message);
 534                                 return; // NOTREACHED
 535                         }
 536                 }
 537
 538                 $relation = $contact['rel'];
 539
 540                 // Decrypt all this stuff we just received
 541
 542                 $foreign_pubkey = $contact['site-pubkey'];
 543                 $dfrn_record = $contact['id'];
 544
 545                 if (!$foreign_pubkey) {
 546                         $message = L10n::t('Site public key not available in contact record for URL %s.', $decrypted_source_url);
 547                         xml_status(3, $message);
 548                 }
 549
 550                 $decrypted_dfrn_id = "";
 551                 openssl_public_decrypt($dfrn_id, $decrypted_dfrn_id, $foreign_pubkey);
 552
 553                 if (strlen($aes_key)) {
 554                         $decrypted_aes_key = "";
 555                         openssl_private_decrypt($aes_key, $decrypted_aes_key, $my_prvkey);
 556                         $dfrn_pubkey = openssl_decrypt($public_key, 'AES-256-CBC', $decrypted_aes_key);
 557                 } else {
 558                         $dfrn_pubkey = $public_key;
 559                 }
 560
 561                 if (dba::exists('contact', ['dfrn-id' => $decrypted_dfrn_id])) {
 562                         $message = L10n::t('The ID provided by your system is a duplicate on our system. It should work if you try again.');
 563                         xml_status(1, $message); // Birthday paradox - duplicate dfrn-id
 564                         // NOTREACHED
 565                 }
 566
 567                 $r = q("UPDATE `contact` SET `dfrn-id` = '%s', `pubkey` = '%s' WHERE `id` = %d",
 568                         dbesc($decrypted_dfrn_id),
 569                         dbesc($dfrn_pubkey),
 570                         intval($dfrn_record)
 571                 );
 572                 if (!DBM::is_result($r)) {
 573                         $message = L10n::t('Unable to set your contact credentials on our system.');
 574                         xml_status(3, $message);
 575                 }
 576
 577                 // It's possible that the other person also requested friendship.
 578                 // If it is a duplex relationship, ditch the issued-id if one exists.
 579
 580                 if ($duplex) {
 581                         q("UPDATE `contact` SET `issued-id` = '' WHERE `id` = %d",
 582                                 intval($dfrn_record)
 583                         );
 584                 }
 585
 586                 // We're good but now we have to scrape the profile photo and send notifications.
 587                 $contact = dba::selectFirst('contact', ['photo'], ['id' => $dfrn_record]);
 588                 if (DBM::is_result($contact)) {
 589                         $photo = $contact['photo'];
 590                 } else {
 591                         $photo = System::baseUrl() . '/images/person-175.jpg';
 592                 }
 593
 594                 Contact::updateAvatar($photo, $local_uid, $dfrn_record);
 595
 596                 logger('dfrn_confirm: request - photos imported');
 597
 598                 $new_relation = CONTACT_IS_SHARING;
 599                 if (($relation == CONTACT_IS_FOLLOWER) || ($duplex)) {
 600                         $new_relation = CONTACT_IS_FRIEND;
 601                 }
 602
 603                 if (($relation == CONTACT_IS_FOLLOWER) && ($duplex)) {
 604                         $duplex = 0;
 605                 }
 606
 607                 $r = q("UPDATE `contact` SET
 608                         `rel` = %d,
 609                         `name-date` = '%s',
 610                         `uri-date` = '%s',
 611                         `blocked` = 0,
 612                         `pending` = 0,
 613                         `duplex` = %d,
 614                         `forum` = %d,
 615                         `prv` = %d,
 616                         `network` = '%s' WHERE `id` = %d
 617                 ",
 618                         intval($new_relation),
 619                         dbesc(datetime_convert()),
 620                         dbesc(datetime_convert()),
 621                         intval($duplex),
 622                         intval($forum),
 623                         intval($prv),
 624                         dbesc(NETWORK_DFRN),
 625                         intval($dfrn_record)
 626                 );
 627                 if (!DBM::is_result($r)) {      // indicates schema is messed up or total db failure
 628                         $message = L10n::t('Unable to update your contact profile details on our system');
 629                         xml_status(3, $message);
 630                 }
 631
 632                 // Otherwise everything seems to have worked and we are almost done. Yay!
 633                 // Send an email notification
 634
 635                 logger('dfrn_confirm: request: info updated');
 636
 637                 $combined = null;
 638                 $r = q("SELECT `contact`.*, `user`.*
 639                         FROM `contact`
 640                         LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 641                         WHERE `contact`.`id` = %d
 642                         LIMIT 1",
 643                         intval($dfrn_record)
 644                 );
 645                 if (DBM::is_result($r)) {
 646                         $combined = $r[0];
 647
 648                         if ($combined['notify-flags'] & NOTIFY_CONFIRM) {
 649                                 $mutual = ($new_relation == CONTACT_IS_FRIEND);
 650                                 notification([
 651                                         'type'         => NOTIFY_CONFIRM,
 652                                         'notify_flags' => $combined['notify-flags'],
 653                                         'language'     => $combined['language'],
 654                                         'to_name'      => $combined['username'],
 655                                         'to_email'     => $combined['email'],
 656                                         'uid'          => $combined['uid'],
 657                                         'link'         => System::baseUrl() . '/contacts/' . $dfrn_record,
 658                                         'source_name'  => ((strlen(stripslashes($combined['name']))) ? stripslashes($combined['name']) : L10n::t('[Name Withheld]')),
 659                                         'source_link'  => $combined['url'],
 660                                         'source_photo' => $combined['photo'],
 661                                         'verb'         => ($mutual?ACTIVITY_FRIEND:ACTIVITY_FOLLOW),
 662                                         'otype'        => 'intro'
 663                                 ]);
 664                         }
 665                 }
 666
 667                 // Send a new friend post if we are allowed to...
 668                 if ($page && intval(PConfig::get($local_uid, 'system', 'post_joingroup'))) {
 669                         $profile = dba::selectFirst('profile', ['hide-friends'], ['is-default' => true, 'uid' => $local_uid]);
 670                         if (x($profile, 'hide-friends') === 0) {
 671                                 $self = dba::selectFirst('contact', [], ['self' => true, 'uid' => $local_uid]);
 672                                 if (DBM::is_result($self)) {
 673                                         $arr = [];
 674                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $local_uid);
 675                                         $arr['uid'] = $local_uid;
 676                                         $arr['contact-id'] = $self['id'];
 677                                         $arr['wall'] = 1;
 678                                         $arr['type'] = 'wall';
 679                                         $arr['gravity'] = 0;
 680                                         $arr['origin'] = 1;
 681                                         $arr['author-name']   = $arr['owner-name']   = $self['name'];
 682                                         $arr['author-link']   = $arr['owner-link']   = $self['url'];
 683                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self['thumb'];
 684
 685                                         $A = '[url=' . $self['url'] . ']' . $self['name'] . '[/url]';
 686                                         $B = '[url=' . $combined['url'] . ']' . $combined['name'] . '[/url]';
 687                                         $BPhoto = '[url=' . $combined['url'] . ']' . '[img]' . $combined['thumb'] . '[/img][/url]';
 688
 689                                         $arr['verb'] = ACTIVITY_JOIN;
 690                                         $arr['object-type'] = ACTIVITY_OBJ_GROUP;
 691                                         $arr['body'] = L10n::t('%1$s has joined %2$s', $A, $B) . "\n\n\n" . $BPhoto;
 692                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_GROUP . '</type><title>' . $combined['name'] . '</title>'
 693                                                 . '<id>' . $combined['url'] . '/' . $combined['name'] . '</id>';
 694                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $combined['url'] . '" />' . "\n");
 695                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $combined['thumb'] . '" />' . "\n");
 696                                         $arr['object'] .= '</link></object>' . "\n";
 697
 698                                         $arr['allow_cid'] = $user['allow_cid'];
 699                                         $arr['allow_gid'] = $user['allow_gid'];
 700                                         $arr['deny_cid']  = $user['deny_cid'];
 701                                         $arr['deny_gid']  = $user['deny_gid'];
 702
 703                                         $i = item_store($arr);
 704                                         if ($i) {
 705                                                 Worker::add(PRIORITY_HIGH, "Notifier", "activity", $i);
 706                                         }
 707                                 }
 708                         }
 709                 }
 710                 xml_status(0); // Success
 711                 return; // NOTREACHED
 712                 ////////////////////// End of this scenario ///////////////////////////////////////////////
 713         }
 714
 715         // somebody arrived here by mistake or they are fishing. Send them to the homepage.
 716         goaway(System::baseUrl());
 717         // NOTREACHED
 718 }