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