mod/dfrn_confirm.php

   1 <?php
   2
   3 /**
   4  * @file mod/dfrn_confirm.php
   5  * @brief Module: dfrn_confirm
   6  * Purpose: Friendship acceptance for DFRN contacts
   7  *.
   8  * There are two possible entry points and three scenarios.
   9  *.
  10  *   1. A form was submitted by our user approving a friendship that originated elsewhere.
  11  *      This may also be called from dfrn_request to automatically approve a friendship.
  12  *
  13  *   2. We may be the target or other side of the conversation to scenario 1, and will
  14  *      interact with that process on our own user's behalf.
  15  *.
  16  *  @see PDF with dfrn specs: https://github.com/friendica/friendica/blob/master/spec/dfrn2.pdf
  17  *    You also find a graphic which describes the confirmation process at
  18  *    https://github.com/friendica/friendica/blob/master/spec/dfrn2_contact_confirmation.png
  19  */
  20
  21 use Friendica\App;
  22 use Friendica\Core\Config;
  23 use Friendica\Core\PConfig;
  24 use Friendica\Core\System;
  25 use Friendica\Core\Worker;
  26 use Friendica\Database\DBM;
  27 use Friendica\Model\Contact;
  28 use Friendica\Model\Group;
  29 use Friendica\Model\User;
  30 use Friendica\Network\Probe;
  31 use Friendica\Protocol\Diaspora;
  32
  33 require_once 'include/enotify.php';
  34 require_once 'include/group.php';
  35
  36 function dfrn_confirm_post(App $a, $handsfree = null) {
  37
  38         if(is_array($handsfree)) {
  39
  40                 /*
  41                  * We were called directly from dfrn_request due to automatic friend acceptance.
  42                  * Any $_POST parameters we may require are supplied in the $handsfree array.
  43                  *
  44                  */
  45
  46                 $node = $handsfree['node'];
  47                 $a->interactive = false; // notice() becomes a no-op since nobody is there to see it
  48
  49         }
  50         else {
  51                 if($a->argc > 1)
  52                         $node = $a->argv[1];
  53         }
  54
  55                 /*
  56                  *
  57                  * Main entry point. Scenario 1. Our user received a friend request notification (perhaps
  58                  * from another site) and clicked 'Approve'.
  59                  * $POST['source_url'] is not set. If it is, it indicates Scenario 2.
  60                  *
  61                  * We may also have been called directly from dfrn_request ($handsfree != null) due to
  62                  * this being a page type which supports automatic friend acceptance. That is also Scenario 1
  63                  * since we are operating on behalf of our registered user to approve a friendship.
  64                  *
  65                  */
  66
  67         if(! x($_POST,'source_url')) {
  68
  69                 $uid = ((is_array($handsfree)) ? $handsfree['uid'] : local_user());
  70
  71                 if(! $uid) {
  72                         notice( t('Permission denied.') . EOL );
  73                         return;
  74                 }
  75
  76                 $user = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
  77                         intval($uid)
  78                 );
  79
  80                 if(! $user) {
  81                         notice( t('Profile not found.') . EOL );
  82                         return;
  83                 }
  84
  85
  86                 // These data elements may come from either the friend request notification form or $handsfree array.
  87
  88                 if(is_array($handsfree)) {
  89                         logger('Confirm in handsfree mode');
  90                         $dfrn_id   = $handsfree['dfrn_id'];
  91                         $intro_id  = $handsfree['intro_id'];
  92                         $duplex    = $handsfree['duplex'];
  93                         $hidden    = ((array_key_exists('hidden',$handsfree)) ? intval($handsfree['hidden']) : 0 );
  94                         $activity  = ((array_key_exists('activity',$handsfree)) ? intval($handsfree['activity']) : 0 );
  95                 }
  96                 else {
  97                         $dfrn_id  = ((x($_POST,'dfrn_id'))    ? notags(trim($_POST['dfrn_id'])) : "");
  98                         $intro_id = ((x($_POST,'intro_id'))   ? intval($_POST['intro_id'])      : 0 );
  99                         $duplex   = ((x($_POST,'duplex'))     ? intval($_POST['duplex'])        : 0 );
 100                         $cid      = ((x($_POST,'contact_id')) ? intval($_POST['contact_id'])    : 0 );
 101                         $hidden   = ((x($_POST,'hidden'))     ? intval($_POST['hidden'])        : 0 );
 102                         $activity = ((x($_POST,'activity'))   ? intval($_POST['activity'])      : 0 );
 103                 }
 104
 105                 /*
 106                  *
 107                  * Ensure that dfrn_id has precedence when we go to find the contact record.
 108                  * We only want to search based on contact id if there is no dfrn_id,
 109                  * e.g. for OStatus network followers.
 110                  *
 111                  */
 112
 113                 if(strlen($dfrn_id))
 114                         $cid = 0;
 115
 116                 logger('Confirming request for dfrn_id (issued) ' . $dfrn_id);
 117                 if($cid)
 118                         logger('Confirming follower with contact_id: ' . $cid);
 119
 120
 121                 /*
 122                  *
 123                  * The other person will have been issued an ID when they first requested friendship.
 124                  * Locate their record. At this time, their record will have both pending and blocked set to 1.
 125                  * There won't be any dfrn_id if this is a network follower, so use the contact_id instead.
 126                  *
 127                  */
 128
 129                 $r = q("SELECT * FROM `contact` WHERE ( ( `issued-id` != '' AND `issued-id` = '%s' ) OR ( `id` = %d AND `id` != 0 ) ) AND `uid` = %d AND `duplex` = 0 LIMIT 1",
 130                         dbesc($dfrn_id),
 131                         intval($cid),
 132                         intval($uid)
 133                 );
 134
 135                 if (! DBM::is_result($r)) {
 136                         logger('Contact not found in DB.');
 137                         notice( t('Contact not found.') . EOL );
 138                         notice( t('This may occasionally happen if contact was requested by both persons and it has already been approved.') . EOL );
 139                         return;
 140                 }
 141
 142                 $contact = $r[0];
 143
 144                 $contact_id   = $contact['id'];
 145                 $relation     = $contact['rel'];
 146                 $site_pubkey  = $contact['site-pubkey'];
 147                 $dfrn_confirm = $contact['confirm'];
 148                 $aes_allow    = $contact['aes_allow'];
 149
 150                 $network = ((strlen($contact['issued-id'])) ? NETWORK_DFRN : NETWORK_OSTATUS);
 151
 152                 if($contact['network'])
 153                         $network = $contact['network'];
 154
 155                 if($network === NETWORK_DFRN) {
 156
 157                         /*
 158                          *
 159                          * Generate a key pair for all further communications with this person.
 160                          * We have a keypair for every contact, and a site key for unknown people.
 161                          * This provides a means to carry on relationships with other people if
 162                          * any single key is compromised. It is a robust key. We're much more
 163                          * worried about key leakage than anybody cracking it.
 164                          *
 165                          */
 166                         require_once 'include/crypto.php';
 167
 168                         $res = new_keypair(4096);
 169
 170
 171                         $private_key = $res['prvkey'];
 172                         $public_key  = $res['pubkey'];
 173
 174                         // Save the private key. Send them the public key.
 175
 176                         $r = q("UPDATE `contact` SET `prvkey` = '%s' WHERE `id` = %d AND `uid` = %d",
 177                                 dbesc($private_key),
 178                                 intval($contact_id),
 179                                 intval($uid)
 180                         );
 181
 182                         $params = array();
 183
 184                         /*
 185                          *
 186                          * Per the DFRN protocol, we will verify both ends by encrypting the dfrn_id with our
 187                          * site private key (person on the other end can decrypt it with our site public key).
 188                          * Then encrypt our profile URL with the other person's site public key. They can decrypt
 189                          * it with their site private key. If the decryption on the other end fails for either
 190                          * item, it indicates tampering or key failure on at least one site and we will not be
 191                          * able to provide a secure communication pathway.
 192                          *
 193                          * If other site is willing to accept full encryption, (aes_allow is 1 AND we have php5.3
 194                          * or later) then we encrypt the personal public key we send them using AES-256-CBC and a
 195                          * random key which is encrypted with their site public key.
 196                          *
 197                          */
 198
 199                         $src_aes_key = openssl_random_pseudo_bytes(64);
 200
 201                         $result = '';
 202                         openssl_private_encrypt($dfrn_id, $result, $user[0]['prvkey']);
 203
 204                         $params['dfrn_id'] = bin2hex($result);
 205                         $params['public_key'] = $public_key;
 206
 207
 208                         $my_url = System::baseUrl() . '/profile/' . $user[0]['nickname'];
 209
 210                         openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
 211                         $params['source_url'] = bin2hex($params['source_url']);
 212
 213                         if($aes_allow && function_exists('openssl_encrypt')) {
 214                                 openssl_public_encrypt($src_aes_key, $params['aes_key'], $site_pubkey);
 215                                 $params['aes_key'] = bin2hex($params['aes_key']);
 216                                 $params['public_key'] = bin2hex(openssl_encrypt($public_key,'AES-256-CBC',$src_aes_key));
 217                         }
 218
 219                         $params['dfrn_version'] = DFRN_PROTOCOL_VERSION ;
 220                         if($duplex == 1)
 221                                 $params['duplex'] = 1;
 222
 223                         if($user[0]['page-flags'] == PAGE_COMMUNITY)
 224                                 $params['page'] = 1;
 225                         if($user[0]['page-flags'] == PAGE_PRVGROUP)
 226                                 $params['page'] = 2;
 227
 228                         logger('Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params,true), LOGGER_DATA);
 229
 230                         /*
 231                          *
 232                          * POST all this stuff to the other site.
 233                          * Temporarily raise the network timeout to 120 seconds because the default 60
 234                          * doesn't always give the other side quite enough time to decrypt everything.
 235                          *
 236                          */
 237
 238                         $res = post_url($dfrn_confirm, $params, null, $redirects, 120);
 239
 240                         logger(' Confirm: received data: ' . $res, LOGGER_DATA);
 241
 242                         // Now figure out what they responded. Try to be robust if the remote site is
 243                         // having difficulty and throwing up errors of some kind.
 244
 245                         $leading_junk = substr($res,0,strpos($res,'<?xml'));
 246
 247                         $res = substr($res,strpos($res,'<?xml'));
 248                         if(! strlen($res)) {
 249
 250                                         // No XML at all, this exchange is messed up really bad.
 251                                         // We shouldn't proceed, because the xml parser might choke,
 252                                         // and $status is going to be zero, which indicates success.
 253                                         // We can hardly call this a success.
 254
 255                                 notice( t('Response from remote site was not understood.') . EOL);
 256                                 return;
 257                         }
 258
 259                         if(strlen($leading_junk) && Config::get('system','debugging')) {
 260
 261                                         // This might be more common. Mixed error text and some XML.
 262                                         // If we're configured for debugging, show the text. Proceed in either case.
 263
 264                                 notice( t('Unexpected response from remote site: ') . EOL . $leading_junk . EOL );
 265                         }
 266
 267                         if(stristr($res, "<status")===false) {
 268                                 // wrong xml! stop here!
 269                                 notice( t('Unexpected response from remote site: ') . EOL . htmlspecialchars($res) . EOL );
 270                                 return;
 271                         }
 272
 273                         $xml = parse_xml_string($res);
 274                         $status = (int) $xml->status;
 275                         $message = unxmlify($xml->message);   // human readable text of what may have gone wrong.
 276                         switch($status) {
 277                                 case 0:
 278                                         info( t("Confirmation completed successfully.") . EOL);
 279                                         if(strlen($message))
 280                                                 notice( t('Remote site reported: ') . $message . EOL);
 281                                         break;
 282                                 case 1:
 283                                         // birthday paradox - generate new dfrn-id and fall through.
 284                                         $new_dfrn_id = random_string();
 285                                         $r = q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d",
 286                                                 dbesc($new_dfrn_id),
 287                                                 intval($contact_id),
 288                                                 intval($uid)
 289                                         );
 290
 291                                 case 2:
 292                                         notice( t("Temporary failure. Please wait and try again.") . EOL);
 293                                         if(strlen($message))
 294                                                 notice( t('Remote site reported: ') . $message . EOL);
 295                                         break;
 296
 297
 298                                 case 3:
 299                                         notice( t("Introduction failed or was revoked.") . EOL);
 300                                         if(strlen($message))
 301                                                 notice( t('Remote site reported: ') . $message . EOL);
 302                                         break;
 303                                 }
 304
 305                         if(($status == 0) && ($intro_id)) {
 306
 307                                 // Success. Delete the notification.
 308
 309                                 $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d",
 310                                         intval($intro_id),
 311                                         intval($uid)
 312                                 );
 313
 314                         }
 315
 316                         if($status != 0)
 317                                 return;
 318                 }
 319
 320
 321                 /*
 322                  *
 323                  * We have now established a relationship with the other site.
 324                  * Let's make our own personal copy of their profile photo so we don't have
 325                  * to always load it from their site.
 326                  *
 327                  * We will also update the contact record with the nature and scope of the relationship.
 328                  *
 329                  */
 330
 331                 Contact::updateAvatar($contact['photo'], $uid, $contact_id);
 332
 333                 logger('dfrn_confirm: confirm - imported photos');
 334
 335                 if($network === NETWORK_DFRN) {
 336
 337                         $new_relation = CONTACT_IS_FOLLOWER;
 338                         if(($relation == CONTACT_IS_SHARING) || ($duplex))
 339                                 $new_relation = CONTACT_IS_FRIEND;
 340
 341                         if(($relation == CONTACT_IS_SHARING) && ($duplex))
 342                                 $duplex = 0;
 343
 344                         $r = q("UPDATE `contact` SET `rel` = %d,
 345                                 `name-date` = '%s',
 346                                 `uri-date` = '%s',
 347                                 `blocked` = 0,
 348                                 `pending` = 0,
 349                                 `duplex` = %d,
 350                                 `hidden` = %d,
 351                                 `network` = '%s' WHERE `id` = %d
 352                         ",
 353                                 intval($new_relation),
 354                                 dbesc(datetime_convert()),
 355                                 dbesc(datetime_convert()),
 356                                 intval($duplex),
 357                                 intval($hidden),
 358                                 dbesc(NETWORK_DFRN),
 359                                 intval($contact_id)
 360                         );
 361                 } else {
 362
 363                         // $network !== NETWORK_DFRN
 364
 365                         $network = (($contact['network']) ? $contact['network'] : NETWORK_OSTATUS);
 366                         $notify = (($contact['notify']) ? $contact['notify'] : '');
 367                         $poll   = (($contact['poll']) ? $contact['poll'] : '');
 368
 369                         $arr = Probe::uri($contact['url']);
 370                         if (empty($contact['notify'])) {
 371                                 $notify = $arr['notify'];
 372                         }
 373                         if (empty($contact['poll'])) {
 374                                 $poll = $arr['poll'];
 375                         }
 376
 377                         $addr = $arr['addr'];
 378
 379                         $new_relation = $contact['rel'];
 380                         $writable = $contact['writable'];
 381
 382                         if($network === NETWORK_DIASPORA) {
 383                                 if($duplex)
 384                                         $new_relation = CONTACT_IS_FRIEND;
 385                                 else
 386                                         $new_relation = CONTACT_IS_FOLLOWER;
 387
 388                                 if($new_relation != CONTACT_IS_FOLLOWER)
 389                                         $writable = 1;
 390                         }
 391
 392                         $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d",
 393                                 intval($intro_id),
 394                                 intval($uid)
 395                         );
 396
 397
 398                         $r = q("UPDATE `contact` SET `name-date` = '%s',
 399                                 `uri-date` = '%s',
 400                                 `addr` = '%s',
 401                                 `notify` = '%s',
 402                                 `poll` = '%s',
 403                                 `blocked` = 0,
 404                                 `pending` = 0,
 405                                 `network` = '%s',
 406                                 `writable` = %d,
 407                                 `hidden` = %d,
 408                                 `rel` = %d
 409                                 WHERE `id` = %d
 410                         ",
 411                                 dbesc(datetime_convert()),
 412                                 dbesc(datetime_convert()),
 413                                 dbesc($addr),
 414                                 dbesc($notify),
 415                                 dbesc($poll),
 416                                 dbesc($network),
 417                                 intval($writable),
 418                                 intval($hidden),
 419                                 intval($new_relation),
 420                                 intval($contact_id)
 421                         );
 422                 }
 423
 424                 /// @TODO is DBM::is_result() working here?
 425                 if ($r === false) {
 426                         notice( t('Unable to set contact photo.') . EOL);
 427                 }
 428
 429                 // reload contact info
 430
 431                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 432                         intval($contact_id)
 433                 );
 434                 if (DBM::is_result($r)) {
 435                         $contact = $r[0];
 436                 } else {
 437                         $contact = null;
 438                 }
 439
 440
 441                 if ((isset($new_relation) && $new_relation == CONTACT_IS_FRIEND)) {
 442
 443                         if (($contact) && ($contact['network'] === NETWORK_DIASPORA)) {
 444                                 $ret = Diaspora::sendShare($user[0],$r[0]);
 445                                 logger('share returns: ' . $ret);
 446                         }
 447
 448                         // Send a new friend post if we are allowed to...
 449
 450                         $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 451                                 intval($uid)
 452                         );
 453
 454                         if((DBM::is_result($r)) && ($r[0]['hide-friends'] == 0) && ($activity) && (! $hidden)) {
 455
 456                                 require_once 'include/items.php';
 457
 458                                 $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 459                                         intval($uid)
 460                                 );
 461
 462                                 if(count($self)) {
 463
 464                                         $arr = array();
 465                                         $arr['guid'] = get_guid(32);
 466                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $uid);
 467                                         $arr['uid'] = $uid;
 468                                         $arr['contact-id'] = $self[0]['id'];
 469                                         $arr['wall'] = 1;
 470                                         $arr['type'] = 'wall';
 471                                         $arr['gravity'] = 0;
 472                                         $arr['origin'] = 1;
 473                                         $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 474                                         $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 475                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 476
 477                                         $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 478                                         $APhoto = '[url=' . $self[0]['url'] . ']' . '[img]' . $self[0]['thumb'] . '[/img][/url]';
 479
 480                                         $B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
 481                                         $BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
 482
 483                                         $arr['verb'] = ACTIVITY_FRIEND;
 484                                         $arr['object-type'] = ACTIVITY_OBJ_PERSON;
 485                                         $arr['body'] =  sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$BPhoto;
 486
 487                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
 488                                                 . '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
 489                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
 490                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
 491                                         $arr['object'] .= '</link></object>' . "\n";
 492
 493                                         $arr['last-child'] = 1;
 494
 495                                         $arr['allow_cid'] = $user[0]['allow_cid'];
 496                                         $arr['allow_gid'] = $user[0]['allow_gid'];
 497                                         $arr['deny_cid']  = $user[0]['deny_cid'];
 498                                         $arr['deny_gid']  = $user[0]['deny_gid'];
 499
 500                                         $i = item_store($arr);
 501                                         if($i)
 502                                                 Worker::add(PRIORITY_HIGH, "Notifier", "activity", $i);
 503                                 }
 504                         }
 505                 }
 506
 507                 Group::addMember(User::getDefaultGroup($uid, $contact["network"]), $contact['id']);
 508
 509                 // Let's send our user to the contact editor in case they want to
 510                 // do anything special with this new friend.
 511                 if ($handsfree === null) {
 512                         goaway(System::baseUrl() . '/contacts/' . intval($contact_id));
 513                 } else {
 514                         return;
 515                 }
 516                 //NOTREACHED
 517         }
 518
 519         /*
 520          *
 521          *
 522          * End of Scenario 1. [Local confirmation of remote friend request].
 523          *
 524          * Begin Scenario 2. This is the remote response to the above scenario.
 525          * This will take place on the site that originally initiated the friend request.
 526          * In the section above where the confirming party makes a POST and
 527          * retrieves xml status information, they are communicating with the following code.
 528          *
 529          */
 530
 531         if (x($_POST,'source_url')) {
 532
 533                 // We are processing an external confirmation to an introduction created by our user.
 534
 535                 $public_key = ((x($_POST,'public_key'))   ? $_POST['public_key']           : '');
 536                 $dfrn_id    = ((x($_POST,'dfrn_id'))      ? hex2bin($_POST['dfrn_id'])     : '');
 537                 $source_url = ((x($_POST,'source_url'))   ? hex2bin($_POST['source_url'])  : '');
 538                 $aes_key    = ((x($_POST,'aes_key'))      ? $_POST['aes_key']              : '');
 539                 $duplex     = ((x($_POST,'duplex'))       ? intval($_POST['duplex'])       : 0 );
 540                 $page       = ((x($_POST,'page'))         ? intval($_POST['page'])         : 0 );
 541                 $version_id = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
 542
 543                 $forum = (($page == 1) ? 1 : 0);
 544                 $prv   = (($page == 2) ? 1 : 0);
 545
 546                 logger('dfrn_confirm: requestee contacted: ' . $node);
 547
 548                 logger('dfrn_confirm: request: POST=' . print_r($_POST,true), LOGGER_DATA);
 549
 550                 // If $aes_key is set, both of these items require unpacking from the hex transport encoding.
 551
 552                 if (x($aes_key)) {
 553                         $aes_key = hex2bin($aes_key);
 554                         $public_key = hex2bin($public_key);
 555                 }
 556
 557                 // Find our user's account
 558
 559                 $r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
 560                         dbesc($node));
 561
 562                 if (! DBM::is_result($r)) {
 563                         $message = sprintf(t('No user record found for \'%s\' '), $node);
 564                         xml_status(3,$message); // failure
 565                         // NOTREACHED
 566                 }
 567
 568                 $my_prvkey = $r[0]['prvkey'];
 569                 $local_uid = $r[0]['uid'];
 570
 571
 572                 if(! strstr($my_prvkey,'PRIVATE KEY')) {
 573                         $message = t('Our site encryption key is apparently messed up.');
 574                         xml_status(3,$message);
 575                 }
 576
 577                 // verify everything
 578
 579                 $decrypted_source_url = "";
 580                 openssl_private_decrypt($source_url,$decrypted_source_url,$my_prvkey);
 581
 582
 583                 if(! strlen($decrypted_source_url)) {
 584                         $message = t('Empty site URL was provided or URL could not be decrypted by us.');
 585                         xml_status(3,$message);
 586                         // NOTREACHED
 587                 }
 588
 589                 $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 590                         dbesc($decrypted_source_url),
 591                         intval($local_uid)
 592                 );
 593                 if (!DBM::is_result($ret)) {
 594                         if (strstr($decrypted_source_url,'http:')) {
 595                                 $newurl = str_replace('http:','https:',$decrypted_source_url);
 596                         } else {
 597                                 $newurl = str_replace('https:','http:',$decrypted_source_url);
 598                         }
 599
 600                         $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 601                                 dbesc($newurl),
 602                                 intval($local_uid)
 603                         );
 604                         if (!DBM::is_result($ret)) {
 605                                 // this is either a bogus confirmation (?) or we deleted the original introduction.
 606                                 $message = t('Contact record was not found for you on our site.');
 607                                 xml_status(3,$message);
 608                                 return; // NOTREACHED
 609                         }
 610                 }
 611
 612                 $relation = $ret[0]['rel'];
 613
 614                 // Decrypt all this stuff we just received
 615
 616                 $foreign_pubkey = $ret[0]['site-pubkey'];
 617                 $dfrn_record    = $ret[0]['id'];
 618
 619                 if (! $foreign_pubkey) {
 620                         $message = sprintf( t('Site public key not available in contact record for URL %s.'), $newurl);
 621                         xml_status(3,$message);
 622                 }
 623
 624                 $decrypted_dfrn_id = "";
 625                 openssl_public_decrypt($dfrn_id,$decrypted_dfrn_id,$foreign_pubkey);
 626
 627                 if (strlen($aes_key)) {
 628                         $decrypted_aes_key = "";
 629                         openssl_private_decrypt($aes_key,$decrypted_aes_key,$my_prvkey);
 630                         $dfrn_pubkey = openssl_decrypt($public_key,'AES-256-CBC',$decrypted_aes_key);
 631                 }
 632                 else {
 633                         $dfrn_pubkey = $public_key;
 634                 }
 635
 636                 $r = q("SELECT * FROM `contact` WHERE `dfrn-id` = '%s' LIMIT 1",
 637                         dbesc($decrypted_dfrn_id)
 638                 );
 639                 if (DBM::is_result($r)) {
 640                         $message = t('The ID provided by your system is a duplicate on our system. It should work if you try again.');
 641                         xml_status(1,$message); // Birthday paradox - duplicate dfrn-id
 642                         // NOTREACHED
 643                 }
 644
 645                 $r = q("UPDATE `contact` SET `dfrn-id` = '%s', `pubkey` = '%s' WHERE `id` = %d",
 646                         dbesc($decrypted_dfrn_id),
 647                         dbesc($dfrn_pubkey),
 648                         intval($dfrn_record)
 649                 );
 650                 if (! DBM::is_result($r)) {
 651                         $message = t('Unable to set your contact credentials on our system.');
 652                         xml_status(3,$message);
 653                 }
 654
 655                 // It's possible that the other person also requested friendship.
 656                 // If it is a duplex relationship, ditch the issued-id if one exists.
 657
 658                 if($duplex) {
 659                         $r = q("UPDATE `contact` SET `issued-id` = '' WHERE `id` = %d",
 660                                 intval($dfrn_record)
 661                         );
 662                 }
 663
 664                 // We're good but now we have to scrape the profile photo and send notifications.
 665
 666
 667
 668                 $r = q("SELECT `photo` FROM `contact` WHERE `id` = %d LIMIT 1",
 669                         intval($dfrn_record));
 670
 671                 if (DBM::is_result($r)) {
 672                         $photo = $r[0]['photo'];
 673                 } else {
 674                         $photo = System::baseUrl() . '/images/person-175.jpg';
 675                 }
 676
 677                 Contact::updateAvatar($photo,$local_uid,$dfrn_record);
 678
 679                 logger('dfrn_confirm: request - photos imported');
 680
 681                 $new_relation = CONTACT_IS_SHARING;
 682                 if (($relation == CONTACT_IS_FOLLOWER) || ($duplex)) {
 683                         $new_relation = CONTACT_IS_FRIEND;
 684                 }
 685
 686                 if (($relation == CONTACT_IS_FOLLOWER) && ($duplex)) {
 687                         $duplex = 0;
 688                 }
 689
 690                 $r = q("UPDATE `contact` SET
 691                         `rel` = %d,
 692                         `name-date` = '%s',
 693                         `uri-date` = '%s',
 694                         `blocked` = 0,
 695                         `pending` = 0,
 696                         `duplex` = %d,
 697                         `forum` = %d,
 698                         `prv` = %d,
 699                         `network` = '%s' WHERE `id` = %d
 700                 ",
 701                         intval($new_relation),
 702                         dbesc(datetime_convert()),
 703                         dbesc(datetime_convert()),
 704                         intval($duplex),
 705                         intval($forum),
 706                         intval($prv),
 707                         dbesc(NETWORK_DFRN),
 708                         intval($dfrn_record)
 709                 );
 710                 if ($r === false) {    // indicates schema is messed up or total db failure
 711                         $message = t('Unable to update your contact profile details on our system');
 712                         xml_status(3,$message);
 713                 }
 714
 715                 // Otherwise everything seems to have worked and we are almost done. Yay!
 716                 // Send an email notification
 717
 718                 logger('dfrn_confirm: request: info updated');
 719
 720                 $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 721                         WHERE `contact`.`id` = %d LIMIT 1",
 722                         intval($dfrn_record)
 723                 );
 724
 725                 if (DBM::is_result($r))
 726                         $combined = $r[0];
 727
 728                 if((DBM::is_result($r)) && ($r[0]['notify-flags'] & NOTIFY_CONFIRM)) {
 729                         $mutual = ($new_relation == CONTACT_IS_FRIEND);
 730                         notification(array(
 731                                 'type'         => NOTIFY_CONFIRM,
 732                                 'notify_flags' => $r[0]['notify-flags'],
 733                                 'language'     => $r[0]['language'],
 734                                 'to_name'      => $r[0]['username'],
 735                                 'to_email'     => $r[0]['email'],
 736                                 'uid'          => $r[0]['uid'],
 737                                 'link'             => System::baseUrl() . '/contacts/' . $dfrn_record,
 738                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
 739                                 'source_link'  => $r[0]['url'],
 740                                 'source_photo' => $r[0]['photo'],
 741                                 'verb'         => ($mutual?ACTIVITY_FRIEND:ACTIVITY_FOLLOW),
 742                                 'otype'        => 'intro'
 743                         ));
 744                 }
 745
 746                 // Send a new friend post if we are allowed to...
 747
 748                 if($page && intval(PConfig::get($local_uid,'system','post_joingroup'))) {
 749                         $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 750                                 intval($local_uid)
 751                         );
 752
 753                         if((DBM::is_result($r)) && ($r[0]['hide-friends'] == 0)) {
 754
 755                                 require_once 'include/items.php';
 756
 757                                 $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 758                                         intval($local_uid)
 759                                 );
 760
 761                                 if(count($self)) {
 762
 763                                         $arr = array();
 764                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $local_uid);
 765                                         $arr['uid'] = $local_uid;
 766                                         $arr['contact-id'] = $self[0]['id'];
 767                                         $arr['wall'] = 1;
 768                                         $arr['type'] = 'wall';
 769                                         $arr['gravity'] = 0;
 770                                         $arr['origin'] = 1;
 771                                         $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 772                                         $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 773                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 774
 775                                         $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 776                                         $APhoto = '[url=' . $self[0]['url'] . ']' . '[img]' . $self[0]['thumb'] . '[/img][/url]';
 777
 778                                         $B = '[url=' . $combined['url'] . ']' . $combined['name'] . '[/url]';
 779                                         $BPhoto = '[url=' . $combined['url'] . ']' . '[img]' . $combined['thumb'] . '[/img][/url]';
 780
 781                                         $arr['verb'] = ACTIVITY_JOIN;
 782                                         $arr['object-type'] = ACTIVITY_OBJ_GROUP;
 783                                         $arr['body'] =  sprintf( t('%1$s has joined %2$s'), $A, $B)."\n\n\n" .$BPhoto;
 784                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_GROUP . '</type><title>' . $combined['name'] . '</title>'
 785                                                 . '<id>' . $combined['url'] . '/' . $combined['name'] . '</id>';
 786                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $combined['url'] . '" />' . "\n");
 787                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $combined['thumb'] . '" />' . "\n");
 788                                         $arr['object'] .= '</link></object>' . "\n";
 789
 790                                         $arr['last-child'] = 1;
 791
 792                                         $arr['allow_cid'] = $user[0]['allow_cid'];
 793                                         $arr['allow_gid'] = $user[0]['allow_gid'];
 794                                         $arr['deny_cid']  = $user[0]['deny_cid'];
 795                                         $arr['deny_gid']  = $user[0]['deny_gid'];
 796
 797                                         $i = item_store($arr);
 798                                         if($i)
 799                                                 Worker::add(PRIORITY_HIGH, "Notifier", "activity", $i);
 800
 801                                 }
 802                         }
 803                 }
 804                 xml_status(0); // Success
 805                 return; // NOTREACHED
 806
 807                         ////////////////////// End of this scenario ///////////////////////////////////////////////
 808         }
 809
 810         // somebody arrived here by mistake or they are fishing. Send them to the homepage.
 811
 812         goaway(System::baseUrl());
 813         // NOTREACHED
 814
 815 }