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