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\Protocol;
  24 use Friendica\Core\System;
  25 use Friendica\Database\DBA;
  26 use Friendica\Model\Contact;
  27 use Friendica\Model\Group;
  28 use Friendica\Model\User;
  29 use Friendica\Network\Probe;
  30 use Friendica\Protocol\Diaspora;
  31 use Friendica\Protocol\ActivityPub;
  32 use Friendica\Util\Crypto;
  33 use Friendica\Util\DateTimeFormat;
  34 use Friendica\Util\Network;
  35 use Friendica\Util\XML;
  36
  37 require_once 'include/enotify.php';
  38 require_once 'include/items.php';
  39
  40 function dfrn_confirm_post(App $a, $handsfree = null)
  41 {
  42         $node = null;
  43         if (is_array($handsfree)) {
  44                 /*
  45                  * We were called directly from dfrn_request due to automatic friend acceptance.
  46                  * Any $_POST parameters we may require are supplied in the $handsfree array.
  47                  *
  48                  */
  49                 $node = $handsfree['node'];
  50                 $a->interactive = false; // notice() becomes a no-op since nobody is there to see it
  51         } elseif ($a->argc > 1) {
  52                 $node = $a->argv[1];
  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         if (!x($_POST, 'source_url')) {
  65                 $uid = defaults($handsfree, 'uid', local_user());
  66                 if (!$uid) {
  67                         notice(L10n::t('Permission denied.') . EOL);
  68                         return;
  69                 }
  70
  71                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
  72                 if (!DBA::isResult($user)) {
  73                         notice(L10n::t('Profile not found.') . EOL);
  74                         return;
  75                 }
  76
  77                 // These data elements may come from either the friend request notification form or $handsfree array.
  78                 if (is_array($handsfree)) {
  79                         logger('Confirm in handsfree mode');
  80                         $dfrn_id  = $handsfree['dfrn_id'];
  81                         $intro_id = $handsfree['intro_id'];
  82                         $duplex   = $handsfree['duplex'];
  83                         $cid      = 0;
  84                         $hidden   = intval(defaults($handsfree, 'hidden'  , 0));
  85                 } else {
  86                         $dfrn_id  = notags(trim(defaults($_POST, 'dfrn_id'   , '')));
  87                         $intro_id =      intval(defaults($_POST, 'intro_id'  , 0));
  88                         $duplex   =      intval(defaults($_POST, 'duplex'    , 0));
  89                         $cid      =      intval(defaults($_POST, 'contact_id', 0));
  90                         $hidden   =      intval(defaults($_POST, 'hidden'    , 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                 $r = q("SELECT *
 113                         FROM `contact`
 114                         WHERE (
 115                                 (`issued-id` != '' AND `issued-id` = '%s')
 116                                 OR
 117                                 (`id` = %d AND `id` != 0)
 118                         )
 119                         AND `uid` = %d
 120                         AND `duplex` = 0
 121                         LIMIT 1",
 122                         DBA::escape($dfrn_id),
 123                         intval($cid),
 124                         intval($uid)
 125                 );
 126                 if (!DBA::isResult($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'])) ? Protocol::DFRN : Protocol::OSTATUS);
 142
 143                 if ($contact['network']) {
 144                         $network = $contact['network'];
 145                 }
 146
 147                 if ($network === Protocol::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  = $res['pubkey'];
 159
 160                         // Save the private key. Send them the public key.
 161                         q("UPDATE `contact` SET `prvkey` = '%s' WHERE `id` = %d AND `uid` = %d",
 162                                 DBA::escape($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'] == Contact::PAGE_COMMUNITY) {
 207                                 $params['page'] = 1;
 208                         }
 209
 210                         if ($user['page-flags'] == Contact::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                         $res = Network::post($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                                 logger('Unexpected response posting to ' . $dfrn_confirm);
 252                                 notice(L10n::t('Unexpected response from remote site: ') . EOL . htmlspecialchars($res) . EOL);
 253                                 return;
 254                         }
 255
 256                         $xml = XML::parseString($res);
 257                         $status = (int) $xml->status;
 258                         $message = unxmlify($xml->message);   // human readable text of what may have gone wrong.
 259                         switch ($status) {
 260                                 case 0:
 261                                         info(L10n::t("Confirmation completed successfully.") . EOL);
 262                                         break;
 263                                 case 1:
 264                                         // birthday paradox - generate new dfrn-id and fall through.
 265                                         $new_dfrn_id = random_string();
 266                                         q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d",
 267                                                 DBA::escape($new_dfrn_id),
 268                                                 intval($contact_id),
 269                                                 intval($uid)
 270                                         );
 271
 272                                 case 2:
 273                                         notice(L10n::t("Temporary failure. Please wait and try again.") . EOL);
 274                                         break;
 275                                 case 3:
 276                                         notice(L10n::t("Introduction failed or was revoked.") . EOL);
 277                                         break;
 278                         }
 279
 280                         if (strlen($message)) {
 281                                 notice(L10n::t('Remote site reported: ') . $message . EOL);
 282                         }
 283
 284                         if (($status == 0) && $intro_id) {
 285                                 $intro = DBA::selectFirst('intro', ['note'], ['id' => $intro_id]);
 286                                 if (DBA::isResult($intro)) {
 287                                         DBA::update('contact', ['reason' => $intro['note']], ['id' => $contact_id]);
 288                                 }
 289
 290                                 // Success. Delete the notification.
 291                                 DBA::delete('intro', ['id' => $intro_id]);
 292                         }
 293
 294                         if ($status != 0) {
 295                                 return;
 296                         }
 297                 }
 298
 299                 /*
 300                  * We have now established a relationship with the other site.
 301                  * Let's make our own personal copy of their profile photo so we don't have
 302                  * to always load it from their site.
 303                  *
 304                  * We will also update the contact record with the nature and scope of the relationship.
 305                  */
 306                 Contact::updateAvatar($contact['photo'], $uid, $contact_id);
 307
 308                 logger('dfrn_confirm: confirm - imported photos');
 309
 310                 if ($network === Protocol::DFRN) {
 311                         $new_relation = Contact::FOLLOWER;
 312
 313                         if (($relation == Contact::SHARING) || ($duplex)) {
 314                                 $new_relation = Contact::FRIEND;
 315                         }
 316
 317                         if (($relation == Contact::SHARING) && ($duplex)) {
 318                                 $duplex = 0;
 319                         }
 320
 321                         $r = q("UPDATE `contact` SET `rel` = %d,
 322                                 `name-date` = '%s',
 323                                 `uri-date` = '%s',
 324                                 `blocked` = 0,
 325                                 `pending` = 0,
 326                                 `duplex` = %d,
 327                                 `hidden` = %d,
 328                                 `network` = '%s' WHERE `id` = %d
 329                         ",
 330                                 intval($new_relation),
 331                                 DBA::escape(DateTimeFormat::utcNow()),
 332                                 DBA::escape(DateTimeFormat::utcNow()),
 333                                 intval($duplex),
 334                                 intval($hidden),
 335                                 DBA::escape(Protocol::DFRN),
 336                                 intval($contact_id)
 337                         );
 338                 } else {
 339                         if ($network == Protocol::ACTIVITYPUB) {
 340                                 ActivityPub::transmitContactAccept($contact['url'], $contact['hub-verify'], $uid);
 341                                 $pending = true;
 342                         } else {
 343                                 $pending = false;
 344                         }
 345
 346                         // $network !== Protocol::DFRN
 347                         $network = defaults($contact, 'network', Protocol::OSTATUS);
 348
 349                         $arr = Probe::uri($contact['url'], $network);
 350
 351                         $notify  = defaults($contact, 'notify' , $arr['notify']);
 352                         $poll    = defaults($contact, 'poll'   , $arr['poll']);
 353
 354                         $addr = $arr['addr'];
 355
 356                         $new_relation = $contact['rel'];
 357                         $writable = $contact['writable'];
 358
 359                         if (in_array($network, [Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
 360                                 if ($duplex) {
 361                                         $new_relation = Contact::FRIEND;
 362                                 } else {
 363                                         $new_relation = Contact::FOLLOWER;
 364                                 }
 365
 366                                 if ($new_relation != Contact::FOLLOWER) {
 367                                         $writable = 1;
 368                                 }
 369                         }
 370
 371                         DBA::delete('intro', ['id' => $intro_id]);
 372
 373                         $fields = ['name-date' => DateTimeFormat::utcNow(),
 374                                 'uri-date' => DateTimeFormat::utcNow(), 'addr' => $addr,
 375                                 'notify' => $notify, 'poll' => $poll, 'blocked' => false,
 376                                 'pending' => $pending, 'network' => $network,
 377                                 'writable' => $writable, 'hidden' => $hidden, 'rel' => $new_relation];
 378                         DBA::update('contact', $fields, ['id' => $contact_id]);
 379                 }
 380
 381                 if (!DBA::isResult($r)) {
 382                         notice(L10n::t('Unable to set contact photo.') . EOL);
 383                 }
 384
 385                 // reload contact info
 386                 $contact = DBA::selectFirst('contact', [], ['id' => $contact_id]);
 387                 if ((isset($new_relation) && $new_relation == Contact::FRIEND)) {
 388                         if (DBA::isResult($contact) && ($contact['network'] === Protocol::DIASPORA)) {
 389                                 $ret = Diaspora::sendShare($user, $contact);
 390                                 logger('share returns: ' . $ret);
 391                         }
 392                 }
 393
 394                 Group::addMember(User::getDefaultGroup($uid, $contact["network"]), $contact['id']);
 395
 396                 if ($network == Protocol::ACTIVITYPUB && $duplex) {
 397                         ActivityPub::transmitActivity('Follow', $contact['url'], $uid);
 398                 }
 399
 400                 // Let's send our user to the contact editor in case they want to
 401                 // do anything special with this new friend.
 402                 if ($handsfree === null) {
 403                         goaway(System::baseUrl() . '/contacts/' . intval($contact_id));
 404                 } else {
 405                         return;
 406                 }
 407                 //NOTREACHED
 408         }
 409
 410         /*
 411          * End of Scenario 1. [Local confirmation of remote friend request].
 412          *
 413          * Begin Scenario 2. This is the remote response to the above scenario.
 414          * This will take place on the site that originally initiated the friend request.
 415          * In the section above where the confirming party makes a POST and
 416          * retrieves xml status information, they are communicating with the following code.
 417          */
 418         if (x($_POST, 'source_url')) {
 419                 // We are processing an external confirmation to an introduction created by our user.
 420                 $public_key =         defaults($_POST, 'public_key', '');
 421                 $dfrn_id    = hex2bin(defaults($_POST, 'dfrn_id'   , ''));
 422                 $source_url = hex2bin(defaults($_POST, 'source_url', ''));
 423                 $aes_key    =         defaults($_POST, 'aes_key'   , '');
 424                 $duplex     =  intval(defaults($_POST, 'duplex'    , 0));
 425                 $page       =  intval(defaults($_POST, 'page'      , 0));
 426
 427                 $forum = (($page == 1) ? 1 : 0);
 428                 $prv   = (($page == 2) ? 1 : 0);
 429
 430                 logger('dfrn_confirm: requestee contacted: ' . $node);
 431
 432                 logger('dfrn_confirm: request: POST=' . print_r($_POST, true), LOGGER_DATA);
 433
 434                 // If $aes_key is set, both of these items require unpacking from the hex transport encoding.
 435
 436                 if (x($aes_key)) {
 437                         $aes_key = hex2bin($aes_key);
 438                         $public_key = hex2bin($public_key);
 439                 }
 440
 441                 // Find our user's account
 442                 $user = DBA::selectFirst('user', [], ['nickname' => $node]);
 443                 if (!DBA::isResult($user)) {
 444                         $message = L10n::t('No user record found for \'%s\' ', $node);
 445                         System::xmlExit(3, $message); // failure
 446                         // NOTREACHED
 447                 }
 448
 449                 $my_prvkey = $user['prvkey'];
 450                 $local_uid = $user['uid'];
 451
 452
 453                 if (!strstr($my_prvkey, 'PRIVATE KEY')) {
 454                         $message = L10n::t('Our site encryption key is apparently messed up.');
 455                         System::xmlExit(3, $message);
 456                 }
 457
 458                 // verify everything
 459
 460                 $decrypted_source_url = "";
 461                 openssl_private_decrypt($source_url, $decrypted_source_url, $my_prvkey);
 462
 463
 464                 if (!strlen($decrypted_source_url)) {
 465                         $message = L10n::t('Empty site URL was provided or URL could not be decrypted by us.');
 466                         System::xmlExit(3, $message);
 467                         // NOTREACHED
 468                 }
 469
 470                 $contact = DBA::selectFirst('contact', [], ['url' => $decrypted_source_url, 'uid' => $local_uid]);
 471                 if (!DBA::isResult($contact)) {
 472                         if (strstr($decrypted_source_url, 'http:')) {
 473                                 $newurl = str_replace('http:', 'https:', $decrypted_source_url);
 474                         } else {
 475                                 $newurl = str_replace('https:', 'http:', $decrypted_source_url);
 476                         }
 477
 478                         $contact = DBA::selectFirst('contact', [], ['url' => $newurl, 'uid' => $local_uid]);
 479                         if (!DBA::isResult($contact)) {
 480                                 // this is either a bogus confirmation (?) or we deleted the original introduction.
 481                                 $message = L10n::t('Contact record was not found for you on our site.');
 482                                 System::xmlExit(3, $message);
 483                                 return; // NOTREACHED
 484                         }
 485                 }
 486
 487                 $relation = $contact['rel'];
 488
 489                 // Decrypt all this stuff we just received
 490
 491                 $foreign_pubkey = $contact['site-pubkey'];
 492                 $dfrn_record = $contact['id'];
 493
 494                 if (!$foreign_pubkey) {
 495                         $message = L10n::t('Site public key not available in contact record for URL %s.', $decrypted_source_url);
 496                         System::xmlExit(3, $message);
 497                 }
 498
 499                 $decrypted_dfrn_id = "";
 500                 openssl_public_decrypt($dfrn_id, $decrypted_dfrn_id, $foreign_pubkey);
 501
 502                 if (strlen($aes_key)) {
 503                         $decrypted_aes_key = "";
 504                         openssl_private_decrypt($aes_key, $decrypted_aes_key, $my_prvkey);
 505                         $dfrn_pubkey = openssl_decrypt($public_key, 'AES-256-CBC', $decrypted_aes_key);
 506                 } else {
 507                         $dfrn_pubkey = $public_key;
 508                 }
 509
 510                 if (DBA::exists('contact', ['dfrn-id' => $decrypted_dfrn_id])) {
 511                         $message = L10n::t('The ID provided by your system is a duplicate on our system. It should work if you try again.');
 512                         System::xmlExit(1, $message); // Birthday paradox - duplicate dfrn-id
 513                         // NOTREACHED
 514                 }
 515
 516                 $r = q("UPDATE `contact` SET `dfrn-id` = '%s', `pubkey` = '%s' WHERE `id` = %d",
 517                         DBA::escape($decrypted_dfrn_id),
 518                         DBA::escape($dfrn_pubkey),
 519                         intval($dfrn_record)
 520                 );
 521                 if (!DBA::isResult($r)) {
 522                         $message = L10n::t('Unable to set your contact credentials on our system.');
 523                         System::xmlExit(3, $message);
 524                 }
 525
 526                 // It's possible that the other person also requested friendship.
 527                 // If it is a duplex relationship, ditch the issued-id if one exists.
 528
 529                 if ($duplex) {
 530                         q("UPDATE `contact` SET `issued-id` = '' WHERE `id` = %d",
 531                                 intval($dfrn_record)
 532                         );
 533                 }
 534
 535                 // We're good but now we have to scrape the profile photo and send notifications.
 536                 $contact = DBA::selectFirst('contact', ['photo'], ['id' => $dfrn_record]);
 537                 if (DBA::isResult($contact)) {
 538                         $photo = $contact['photo'];
 539                 } else {
 540                         $photo = System::baseUrl() . '/images/person-175.jpg';
 541                 }
 542
 543                 Contact::updateAvatar($photo, $local_uid, $dfrn_record);
 544
 545                 logger('dfrn_confirm: request - photos imported');
 546
 547                 $new_relation = Contact::SHARING;
 548
 549                 if (($relation == Contact::FOLLOWER) || ($duplex)) {
 550                         $new_relation = Contact::FRIEND;
 551                 }
 552
 553                 if (($relation == Contact::FOLLOWER) && ($duplex)) {
 554                         $duplex = 0;
 555                 }
 556
 557                 $r = q("UPDATE `contact` SET
 558                         `rel` = %d,
 559                         `name-date` = '%s',
 560                         `uri-date` = '%s',
 561                         `blocked` = 0,
 562                         `pending` = 0,
 563                         `duplex` = %d,
 564                         `forum` = %d,
 565                         `prv` = %d,
 566                         `network` = '%s' WHERE `id` = %d
 567                 ",
 568                         intval($new_relation),
 569                         DBA::escape(DateTimeFormat::utcNow()),
 570                         DBA::escape(DateTimeFormat::utcNow()),
 571                         intval($duplex),
 572                         intval($forum),
 573                         intval($prv),
 574                         DBA::escape(Protocol::DFRN),
 575                         intval($dfrn_record)
 576                 );
 577                 if (!DBA::isResult($r)) {       // indicates schema is messed up or total db failure
 578                         $message = L10n::t('Unable to update your contact profile details on our system');
 579                         System::xmlExit(3, $message);
 580                 }
 581
 582                 // Otherwise everything seems to have worked and we are almost done. Yay!
 583                 // Send an email notification
 584
 585                 logger('dfrn_confirm: request: info updated');
 586
 587                 $combined = null;
 588                 $r = q("SELECT `contact`.*, `user`.*
 589                         FROM `contact`
 590                         LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 591                         WHERE `contact`.`id` = %d
 592                         LIMIT 1",
 593                         intval($dfrn_record)
 594                 );
 595                 if (DBA::isResult($r)) {
 596                         $combined = $r[0];
 597
 598                         if ($combined['notify-flags'] & NOTIFY_CONFIRM) {
 599                                 $mutual = ($new_relation == Contact::FRIEND);
 600                                 notification([
 601                                         'type'         => NOTIFY_CONFIRM,
 602                                         'notify_flags' => $combined['notify-flags'],
 603                                         'language'     => $combined['language'],
 604                                         'to_name'      => $combined['username'],
 605                                         'to_email'     => $combined['email'],
 606                                         'uid'          => $combined['uid'],
 607                                         'link'         => System::baseUrl() . '/contacts/' . $dfrn_record,
 608                                         'source_name'  => ((strlen(stripslashes($combined['name']))) ? stripslashes($combined['name']) : L10n::t('[Name Withheld]')),
 609                                         'source_link'  => $combined['url'],
 610                                         'source_photo' => $combined['photo'],
 611                                         'verb'         => ($mutual?ACTIVITY_FRIEND:ACTIVITY_FOLLOW),
 612                                         'otype'        => 'intro'
 613                                 ]);
 614                         }
 615                 }
 616
 617                 System::xmlExit(0); // Success
 618                 return; // NOTREACHED
 619                 ////////////////////// End of this scenario ///////////////////////////////////////////////
 620         }
 621
 622         // somebody arrived here by mistake or they are fishing. Send them to the homepage.
 623         goaway(System::baseUrl());
 624         // NOTREACHED
 625 }