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\Network\Probe;
  28 use Friendica\Protocol\Diaspora;
  29
  30 require_once 'include/enotify.php';
  31 require_once 'include/group.php';
  32
  33 function dfrn_confirm_post(App $a, $handsfree = null) {
  34
  35         if(is_array($handsfree)) {
  36
  37                 /*
  38                  * We were called directly from dfrn_request due to automatic friend acceptance.
  39                  * Any $_POST parameters we may require are supplied in the $handsfree array.
  40                  *
  41                  */
  42
  43                 $node = $handsfree['node'];
  44                 $a->interactive = false; // notice() becomes a no-op since nobody is there to see it
  45
  46         }
  47         else {
  48                 if($a->argc > 1)
  49                         $node = $a->argv[1];
  50         }
  51
  52                 /*
  53                  *
  54                  * Main entry point. Scenario 1. Our user received a friend request notification (perhaps
  55                  * from another site) and clicked 'Approve'.
  56                  * $POST['source_url'] is not set. If it is, it indicates Scenario 2.
  57                  *
  58                  * We may also have been called directly from dfrn_request ($handsfree != null) due to
  59                  * this being a page type which supports automatic friend acceptance. That is also Scenario 1
  60                  * since we are operating on behalf of our registered user to approve a friendship.
  61                  *
  62                  */
  63
  64         if(! x($_POST,'source_url')) {
  65
  66                 $uid = ((is_array($handsfree)) ? $handsfree['uid'] : local_user());
  67
  68                 if(! $uid) {
  69                         notice( t('Permission denied.') . EOL );
  70                         return;
  71                 }
  72
  73                 $user = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
  74                         intval($uid)
  75                 );
  76
  77                 if(! $user) {
  78                         notice( t('Profile not found.') . EOL );
  79                         return;
  80                 }
  81
  82
  83                 // These data elements may come from either the friend request notification form or $handsfree array.
  84
  85                 if(is_array($handsfree)) {
  86                         logger('Confirm in handsfree mode');
  87                         $dfrn_id   = $handsfree['dfrn_id'];
  88                         $intro_id  = $handsfree['intro_id'];
  89                         $duplex    = $handsfree['duplex'];
  90                         $hidden    = ((array_key_exists('hidden',$handsfree)) ? intval($handsfree['hidden']) : 0 );
  91                         $activity  = ((array_key_exists('activity',$handsfree)) ? intval($handsfree['activity']) : 0 );
  92                 }
  93                 else {
  94                         $dfrn_id  = ((x($_POST,'dfrn_id'))    ? notags(trim($_POST['dfrn_id'])) : "");
  95                         $intro_id = ((x($_POST,'intro_id'))   ? intval($_POST['intro_id'])      : 0 );
  96                         $duplex   = ((x($_POST,'duplex'))     ? intval($_POST['duplex'])        : 0 );
  97                         $cid      = ((x($_POST,'contact_id')) ? intval($_POST['contact_id'])    : 0 );
  98                         $hidden   = ((x($_POST,'hidden'))     ? intval($_POST['hidden'])        : 0 );
  99                         $activity = ((x($_POST,'activity'))   ? intval($_POST['activity'])      : 0 );
 100                 }
 101
 102                 /*
 103                  *
 104                  * Ensure that dfrn_id has precedence when we go to find the contact record.
 105                  * We only want to search based on contact id if there is no dfrn_id,
 106                  * e.g. for OStatus network followers.
 107                  *
 108                  */
 109
 110                 if(strlen($dfrn_id))
 111                         $cid = 0;
 112
 113                 logger('Confirming request for dfrn_id (issued) ' . $dfrn_id);
 114                 if($cid)
 115                         logger('Confirming follower with contact_id: ' . $cid);
 116
 117
 118                 /*
 119                  *
 120                  * The other person will have been issued an ID when they first requested friendship.
 121                  * Locate their record. At this time, their record will have both pending and blocked set to 1.
 122                  * There won't be any dfrn_id if this is a network follower, so use the contact_id instead.
 123                  *
 124                  */
 125
 126                 $r = q("SELECT * FROM `contact` WHERE ( ( `issued-id` != '' AND `issued-id` = '%s' ) OR ( `id` = %d AND `id` != 0 ) ) AND `uid` = %d AND `duplex` = 0 LIMIT 1",
 127                         dbesc($dfrn_id),
 128                         intval($cid),
 129                         intval($uid)
 130                 );
 131
 132                 if (! DBM::is_result($r)) {
 133                         logger('Contact not found in DB.');
 134                         notice( t('Contact not found.') . EOL );
 135                         notice( t('This may occasionally happen if contact was requested by both persons and it has already been approved.') . EOL );
 136                         return;
 137                 }
 138
 139                 $contact = $r[0];
 140
 141                 $contact_id   = $contact['id'];
 142                 $relation     = $contact['rel'];
 143                 $site_pubkey  = $contact['site-pubkey'];
 144                 $dfrn_confirm = $contact['confirm'];
 145                 $aes_allow    = $contact['aes_allow'];
 146
 147                 $network = ((strlen($contact['issued-id'])) ? NETWORK_DFRN : NETWORK_OSTATUS);
 148
 149                 if($contact['network'])
 150                         $network = $contact['network'];
 151
 152                 if($network === NETWORK_DFRN) {
 153
 154                         /*
 155                          *
 156                          * Generate a key pair for all further communications with this person.
 157                          * We have a keypair for every contact, and a site key for unknown people.
 158                          * This provides a means to carry on relationships with other people if
 159                          * any single key is compromised. It is a robust key. We're much more
 160                          * worried about key leakage than anybody cracking it.
 161                          *
 162                          */
 163                         require_once 'include/crypto.php';
 164
 165                         $res = new_keypair(4096);
 166
 167
 168                         $private_key = $res['prvkey'];
 169                         $public_key  = $res['pubkey'];
 170
 171                         // Save the private key. Send them the public key.
 172
 173                         $r = q("UPDATE `contact` SET `prvkey` = '%s' WHERE `id` = %d AND `uid` = %d",
 174                                 dbesc($private_key),
 175                                 intval($contact_id),
 176                                 intval($uid)
 177                         );
 178
 179                         $params = array();
 180
 181                         /*
 182                          *
 183                          * Per the DFRN protocol, we will verify both ends by encrypting the dfrn_id with our
 184                          * site private key (person on the other end can decrypt it with our site public key).
 185                          * Then encrypt our profile URL with the other person's site public key. They can decrypt
 186                          * it with their site private key. If the decryption on the other end fails for either
 187                          * item, it indicates tampering or key failure on at least one site and we will not be
 188                          * able to provide a secure communication pathway.
 189                          *
 190                          * If other site is willing to accept full encryption, (aes_allow is 1 AND we have php5.3
 191                          * or later) then we encrypt the personal public key we send them using AES-256-CBC and a
 192                          * random key which is encrypted with their site public key.
 193                          *
 194                          */
 195
 196                         $src_aes_key = openssl_random_pseudo_bytes(64);
 197
 198                         $result = '';
 199                         openssl_private_encrypt($dfrn_id, $result, $user[0]['prvkey']);
 200
 201                         $params['dfrn_id'] = bin2hex($result);
 202                         $params['public_key'] = $public_key;
 203
 204
 205                         $my_url = System::baseUrl() . '/profile/' . $user[0]['nickname'];
 206
 207                         openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
 208                         $params['source_url'] = bin2hex($params['source_url']);
 209
 210                         if($aes_allow && function_exists('openssl_encrypt')) {
 211                                 openssl_public_encrypt($src_aes_key, $params['aes_key'], $site_pubkey);
 212                                 $params['aes_key'] = bin2hex($params['aes_key']);
 213                                 $params['public_key'] = bin2hex(openssl_encrypt($public_key,'AES-256-CBC',$src_aes_key));
 214                         }
 215
 216                         $params['dfrn_version'] = DFRN_PROTOCOL_VERSION ;
 217                         if($duplex == 1)
 218                                 $params['duplex'] = 1;
 219
 220                         if($user[0]['page-flags'] == PAGE_COMMUNITY)
 221                                 $params['page'] = 1;
 222                         if($user[0]['page-flags'] == PAGE_PRVGROUP)
 223                                 $params['page'] = 2;
 224
 225                         logger('Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params,true), LOGGER_DATA);
 226
 227                         /*
 228                          *
 229                          * POST all this stuff to the other site.
 230                          * Temporarily raise the network timeout to 120 seconds because the default 60
 231                          * doesn't always give the other side quite enough time to decrypt everything.
 232                          *
 233                          */
 234
 235                         $res = post_url($dfrn_confirm, $params, null, $redirects, 120);
 236
 237                         logger(' Confirm: received data: ' . $res, LOGGER_DATA);
 238
 239                         // Now figure out what they responded. Try to be robust if the remote site is
 240                         // having difficulty and throwing up errors of some kind.
 241
 242                         $leading_junk = substr($res,0,strpos($res,'<?xml'));
 243
 244                         $res = substr($res,strpos($res,'<?xml'));
 245                         if(! strlen($res)) {
 246
 247                                         // No XML at all, this exchange is messed up really bad.
 248                                         // We shouldn't proceed, because the xml parser might choke,
 249                                         // and $status is going to be zero, which indicates success.
 250                                         // We can hardly call this a success.
 251
 252                                 notice( t('Response from remote site was not understood.') . EOL);
 253                                 return;
 254                         }
 255
 256                         if(strlen($leading_junk) && Config::get('system','debugging')) {
 257
 258                                         // This might be more common. Mixed error text and some XML.
 259                                         // If we're configured for debugging, show the text. Proceed in either case.
 260
 261                                 notice( t('Unexpected response from remote site: ') . EOL . $leading_junk . EOL );
 262                         }
 263
 264                         if(stristr($res, "<status")===false) {
 265                                 // wrong xml! stop here!
 266                                 notice( t('Unexpected response from remote site: ') . EOL . htmlspecialchars($res) . EOL );
 267                                 return;
 268                         }
 269
 270                         $xml = parse_xml_string($res);
 271                         $status = (int) $xml->status;
 272                         $message = unxmlify($xml->message);   // human readable text of what may have gone wrong.
 273                         switch($status) {
 274                                 case 0:
 275                                         info( t("Confirmation completed successfully.") . EOL);
 276                                         if(strlen($message))
 277                                                 notice( t('Remote site reported: ') . $message . EOL);
 278                                         break;
 279                                 case 1:
 280                                         // birthday paradox - generate new dfrn-id and fall through.
 281                                         $new_dfrn_id = random_string();
 282                                         $r = q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d",
 283                                                 dbesc($new_dfrn_id),
 284                                                 intval($contact_id),
 285                                                 intval($uid)
 286                                         );
 287
 288                                 case 2:
 289                                         notice( t("Temporary failure. Please wait and try again.") . EOL);
 290                                         if(strlen($message))
 291                                                 notice( t('Remote site reported: ') . $message . EOL);
 292                                         break;
 293
 294
 295                                 case 3:
 296                                         notice( t("Introduction failed or was revoked.") . EOL);
 297                                         if(strlen($message))
 298                                                 notice( t('Remote site reported: ') . $message . EOL);
 299                                         break;
 300                                 }
 301
 302                         if(($status == 0) && ($intro_id)) {
 303
 304                                 // Success. Delete the notification.
 305
 306                                 $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d",
 307                                         intval($intro_id),
 308                                         intval($uid)
 309                                 );
 310
 311                         }
 312
 313                         if($status != 0)
 314                                 return;
 315                 }
 316
 317
 318                 /*
 319                  *
 320                  * We have now established a relationship with the other site.
 321                  * Let's make our own personal copy of their profile photo so we don't have
 322                  * to always load it from their site.
 323                  *
 324                  * We will also update the contact record with the nature and scope of the relationship.
 325                  *
 326                  */
 327
 328                 require_once 'include/Photo.php';
 329
 330                 update_contact_avatar($contact['photo'],$uid,$contact_id);
 331
 332                 logger('dfrn_confirm: confirm - imported photos');
 333
 334                 if($network === NETWORK_DFRN) {
 335
 336                         $new_relation = CONTACT_IS_FOLLOWER;
 337                         if(($relation == CONTACT_IS_SHARING) || ($duplex))
 338                                 $new_relation = CONTACT_IS_FRIEND;
 339
 340                         if(($relation == CONTACT_IS_SHARING) && ($duplex))
 341                                 $duplex = 0;
 342
 343                         $r = q("UPDATE `contact` SET `rel` = %d,
 344                                 `name-date` = '%s',
 345                                 `uri-date` = '%s',
 346                                 `blocked` = 0,
 347                                 `pending` = 0,
 348                                 `duplex` = %d,
 349                                 `hidden` = %d,
 350                                 `network` = '%s' WHERE `id` = %d
 351                         ",
 352                                 intval($new_relation),
 353                                 dbesc(datetime_convert()),
 354                                 dbesc(datetime_convert()),
 355                                 intval($duplex),
 356                                 intval($hidden),
 357                                 dbesc(NETWORK_DFRN),
 358                                 intval($contact_id)
 359                         );
 360                 } else {
 361
 362                         // $network !== NETWORK_DFRN
 363
 364                         $network = (($contact['network']) ? $contact['network'] : NETWORK_OSTATUS);
 365                         $notify = (($contact['notify']) ? $contact['notify'] : '');
 366                         $poll   = (($contact['poll']) ? $contact['poll'] : '');
 367
 368                         $arr = Probe::uri($contact['url']);
 369                         if (empty($contact['notify'])) {
 370                                 $notify = $arr['notify'];
 371                         }
 372                         if (empty($contact['poll'])) {
 373                                 $poll = $arr['poll'];
 374                         }
 375
 376                         $addr = $arr['addr'];
 377
 378                         $new_relation = $contact['rel'];
 379                         $writable = $contact['writable'];
 380
 381                         if($network === NETWORK_DIASPORA) {
 382                                 if($duplex)
 383                                         $new_relation = CONTACT_IS_FRIEND;
 384                                 else
 385                                         $new_relation = CONTACT_IS_FOLLOWER;
 386
 387                                 if($new_relation != CONTACT_IS_FOLLOWER)
 388                                         $writable = 1;
 389                         }
 390
 391                         $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d",
 392                                 intval($intro_id),
 393                                 intval($uid)
 394                         );
 395
 396
 397                         $r = q("UPDATE `contact` SET `name-date` = '%s',
 398                                 `uri-date` = '%s',
 399                                 `addr` = '%s',
 400                                 `notify` = '%s',
 401                                 `poll` = '%s',
 402                                 `blocked` = 0,
 403                                 `pending` = 0,
 404                                 `network` = '%s',
 405                                 `writable` = %d,
 406                                 `hidden` = %d,
 407                                 `rel` = %d
 408                                 WHERE `id` = %d
 409                         ",
 410                                 dbesc(datetime_convert()),
 411                                 dbesc(datetime_convert()),
 412                                 dbesc($addr),
 413                                 dbesc($notify),
 414                                 dbesc($poll),
 415                                 dbesc($network),
 416                                 intval($writable),
 417                                 intval($hidden),
 418                                 intval($new_relation),
 419                                 intval($contact_id)
 420                         );
 421                 }
 422
 423                 /// @TODO is DBM::is_result() working here?
 424                 if ($r === false) {
 425                         notice( t('Unable to set contact photo.') . EOL);
 426                 }
 427
 428                 // reload contact info
 429
 430                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 431                         intval($contact_id)
 432                 );
 433                 if (DBM::is_result($r)) {
 434                         $contact = $r[0];
 435                 } else {
 436                         $contact = null;
 437                 }
 438
 439
 440                 if ((isset($new_relation) && $new_relation == CONTACT_IS_FRIEND)) {
 441
 442                         if (($contact) && ($contact['network'] === NETWORK_DIASPORA)) {
 443                                 $ret = Diaspora::sendShare($user[0],$r[0]);
 444                                 logger('share returns: ' . $ret);
 445                         }
 446
 447                         // Send a new friend post if we are allowed to...
 448
 449                         $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 450                                 intval($uid)
 451                         );
 452
 453                         if((DBM::is_result($r)) && ($r[0]['hide-friends'] == 0) && ($activity) && (! $hidden)) {
 454
 455                                 require_once 'include/items.php';
 456
 457                                 $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 458                                         intval($uid)
 459                                 );
 460
 461                                 if(count($self)) {
 462
 463                                         $arr = array();
 464                                         $arr['guid'] = get_guid(32);
 465                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $uid);
 466                                         $arr['uid'] = $uid;
 467                                         $arr['contact-id'] = $self[0]['id'];
 468                                         $arr['wall'] = 1;
 469                                         $arr['type'] = 'wall';
 470                                         $arr['gravity'] = 0;
 471                                         $arr['origin'] = 1;
 472                                         $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 473                                         $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 474                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 475
 476                                         $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 477                                         $APhoto = '[url=' . $self[0]['url'] . ']' . '[img]' . $self[0]['thumb'] . '[/img][/url]';
 478
 479                                         $B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
 480                                         $BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
 481
 482                                         $arr['verb'] = ACTIVITY_FRIEND;
 483                                         $arr['object-type'] = ACTIVITY_OBJ_PERSON;
 484                                         $arr['body'] =  sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$BPhoto;
 485
 486                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
 487                                                 . '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
 488                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
 489                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
 490                                         $arr['object'] .= '</link></object>' . "\n";
 491
 492                                         $arr['last-child'] = 1;
 493
 494                                         $arr['allow_cid'] = $user[0]['allow_cid'];
 495                                         $arr['allow_gid'] = $user[0]['allow_gid'];
 496                                         $arr['deny_cid']  = $user[0]['deny_cid'];
 497                                         $arr['deny_gid']  = $user[0]['deny_gid'];
 498
 499                                         $i = item_store($arr);
 500                                         if($i)
 501                                                 Worker::add(PRIORITY_HIGH, "Notifier", "activity", $i);
 502                                 }
 503                         }
 504                 }
 505
 506                 $def_gid = get_default_group($uid, $contact["network"]);
 507                 if($contact && intval($def_gid))
 508                         group_add_member($uid, '', $contact['id'], $def_gid);
 509
 510                 // Let's send our user to the contact editor in case they want to
 511                 // do anything special with this new friend.
 512
 513                 if ($handsfree === null) {
 514                         goaway(System::baseUrl() . '/contacts/' . intval($contact_id));
 515                 } else {
 516                         return;
 517                 }
 518                 //NOTREACHED
 519         }
 520
 521         /*
 522          *
 523          *
 524          * End of Scenario 1. [Local confirmation of remote friend request].
 525          *
 526          * Begin Scenario 2. This is the remote response to the above scenario.
 527          * This will take place on the site that originally initiated the friend request.
 528          * In the section above where the confirming party makes a POST and
 529          * retrieves xml status information, they are communicating with the following code.
 530          *
 531          */
 532
 533         if (x($_POST,'source_url')) {
 534
 535                 // We are processing an external confirmation to an introduction created by our user.
 536
 537                 $public_key = ((x($_POST,'public_key'))   ? $_POST['public_key']           : '');
 538                 $dfrn_id    = ((x($_POST,'dfrn_id'))      ? hex2bin($_POST['dfrn_id'])     : '');
 539                 $source_url = ((x($_POST,'source_url'))   ? hex2bin($_POST['source_url'])  : '');
 540                 $aes_key    = ((x($_POST,'aes_key'))      ? $_POST['aes_key']              : '');
 541                 $duplex     = ((x($_POST,'duplex'))       ? intval($_POST['duplex'])       : 0 );
 542                 $page       = ((x($_POST,'page'))         ? intval($_POST['page'])         : 0 );
 543                 $version_id = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
 544
 545                 $forum = (($page == 1) ? 1 : 0);
 546                 $prv   = (($page == 2) ? 1 : 0);
 547
 548                 logger('dfrn_confirm: requestee contacted: ' . $node);
 549
 550                 logger('dfrn_confirm: request: POST=' . print_r($_POST,true), LOGGER_DATA);
 551
 552                 // If $aes_key is set, both of these items require unpacking from the hex transport encoding.
 553
 554                 if (x($aes_key)) {
 555                         $aes_key = hex2bin($aes_key);
 556                         $public_key = hex2bin($public_key);
 557                 }
 558
 559                 // Find our user's account
 560
 561                 $r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
 562                         dbesc($node));
 563
 564                 if (! DBM::is_result($r)) {
 565                         $message = sprintf(t('No user record found for \'%s\' '), $node);
 566                         xml_status(3,$message); // failure
 567                         // NOTREACHED
 568                 }
 569
 570                 $my_prvkey = $r[0]['prvkey'];
 571                 $local_uid = $r[0]['uid'];
 572
 573
 574                 if(! strstr($my_prvkey,'PRIVATE KEY')) {
 575                         $message = t('Our site encryption key is apparently messed up.');
 576                         xml_status(3,$message);
 577                 }
 578
 579                 // verify everything
 580
 581                 $decrypted_source_url = "";
 582                 openssl_private_decrypt($source_url,$decrypted_source_url,$my_prvkey);
 583
 584
 585                 if(! strlen($decrypted_source_url)) {
 586                         $message = t('Empty site URL was provided or URL could not be decrypted by us.');
 587                         xml_status(3,$message);
 588                         // NOTREACHED
 589                 }
 590
 591                 $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 592                         dbesc($decrypted_source_url),
 593                         intval($local_uid)
 594                 );
 595                 if (!DBM::is_result($ret)) {
 596                         if (strstr($decrypted_source_url,'http:')) {
 597                                 $newurl = str_replace('http:','https:',$decrypted_source_url);
 598                         } else {
 599                                 $newurl = str_replace('https:','http:',$decrypted_source_url);
 600                         }
 601
 602                         $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 603                                 dbesc($newurl),
 604                                 intval($local_uid)
 605                         );
 606                         if (!DBM::is_result($ret)) {
 607                                 // this is either a bogus confirmation (?) or we deleted the original introduction.
 608                                 $message = t('Contact record was not found for you on our site.');
 609                                 xml_status(3,$message);
 610                                 return; // NOTREACHED
 611                         }
 612                 }
 613
 614                 $relation = $ret[0]['rel'];
 615
 616                 // Decrypt all this stuff we just received
 617
 618                 $foreign_pubkey = $ret[0]['site-pubkey'];
 619                 $dfrn_record    = $ret[0]['id'];
 620
 621                 if (! $foreign_pubkey) {
 622                         $message = sprintf( t('Site public key not available in contact record for URL %s.'), $newurl);
 623                         xml_status(3,$message);
 624                 }
 625
 626                 $decrypted_dfrn_id = "";
 627                 openssl_public_decrypt($dfrn_id,$decrypted_dfrn_id,$foreign_pubkey);
 628
 629                 if (strlen($aes_key)) {
 630                         $decrypted_aes_key = "";
 631                         openssl_private_decrypt($aes_key,$decrypted_aes_key,$my_prvkey);
 632                         $dfrn_pubkey = openssl_decrypt($public_key,'AES-256-CBC',$decrypted_aes_key);
 633                 }
 634                 else {
 635                         $dfrn_pubkey = $public_key;
 636                 }
 637
 638                 $r = q("SELECT * FROM `contact` WHERE `dfrn-id` = '%s' LIMIT 1",
 639                         dbesc($decrypted_dfrn_id)
 640                 );
 641                 if (DBM::is_result($r)) {
 642                         $message = t('The ID provided by your system is a duplicate on our system. It should work if you try again.');
 643                         xml_status(1,$message); // Birthday paradox - duplicate dfrn-id
 644                         // NOTREACHED
 645                 }
 646
 647                 $r = q("UPDATE `contact` SET `dfrn-id` = '%s', `pubkey` = '%s' WHERE `id` = %d",
 648                         dbesc($decrypted_dfrn_id),
 649                         dbesc($dfrn_pubkey),
 650                         intval($dfrn_record)
 651                 );
 652                 if (! DBM::is_result($r)) {
 653                         $message = t('Unable to set your contact credentials on our system.');
 654                         xml_status(3,$message);
 655                 }
 656
 657                 // It's possible that the other person also requested friendship.
 658                 // If it is a duplex relationship, ditch the issued-id if one exists.
 659
 660                 if($duplex) {
 661                         $r = q("UPDATE `contact` SET `issued-id` = '' WHERE `id` = %d",
 662                                 intval($dfrn_record)
 663                         );
 664                 }
 665
 666                 // We're good but now we have to scrape the profile photo and send notifications.
 667
 668
 669
 670                 $r = q("SELECT `photo` FROM `contact` WHERE `id` = %d LIMIT 1",
 671                         intval($dfrn_record));
 672
 673                 if (DBM::is_result($r)) {
 674                         $photo = $r[0]['photo'];
 675                 } else {
 676                         $photo = System::baseUrl() . '/images/person-175.jpg';
 677                 }
 678
 679                 require_once 'include/Photo.php';
 680
 681                 update_contact_avatar($photo,$local_uid,$dfrn_record);
 682
 683                 logger('dfrn_confirm: request - photos imported');
 684
 685                 $new_relation = CONTACT_IS_SHARING;
 686                 if (($relation == CONTACT_IS_FOLLOWER) || ($duplex)) {
 687                         $new_relation = CONTACT_IS_FRIEND;
 688                 }
 689
 690                 if (($relation == CONTACT_IS_FOLLOWER) && ($duplex)) {
 691                         $duplex = 0;
 692                 }
 693
 694                 $r = q("UPDATE `contact` SET
 695                         `rel` = %d,
 696                         `name-date` = '%s',
 697                         `uri-date` = '%s',
 698                         `blocked` = 0,
 699                         `pending` = 0,
 700                         `duplex` = %d,
 701                         `forum` = %d,
 702                         `prv` = %d,
 703                         `network` = '%s' WHERE `id` = %d
 704                 ",
 705                         intval($new_relation),
 706                         dbesc(datetime_convert()),
 707                         dbesc(datetime_convert()),
 708                         intval($duplex),
 709                         intval($forum),
 710                         intval($prv),
 711                         dbesc(NETWORK_DFRN),
 712                         intval($dfrn_record)
 713                 );
 714                 if ($r === false) {    // indicates schema is messed up or total db failure
 715                         $message = t('Unable to update your contact profile details on our system');
 716                         xml_status(3,$message);
 717                 }
 718
 719                 // Otherwise everything seems to have worked and we are almost done. Yay!
 720                 // Send an email notification
 721
 722                 logger('dfrn_confirm: request: info updated');
 723
 724                 $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 725                         WHERE `contact`.`id` = %d LIMIT 1",
 726                         intval($dfrn_record)
 727                 );
 728
 729                 if (DBM::is_result($r))
 730                         $combined = $r[0];
 731
 732                 if((DBM::is_result($r)) && ($r[0]['notify-flags'] & NOTIFY_CONFIRM)) {
 733                         $mutual = ($new_relation == CONTACT_IS_FRIEND);
 734                         notification(array(
 735                                 'type'         => NOTIFY_CONFIRM,
 736                                 'notify_flags' => $r[0]['notify-flags'],
 737                                 'language'     => $r[0]['language'],
 738                                 'to_name'      => $r[0]['username'],
 739                                 'to_email'     => $r[0]['email'],
 740                                 'uid'          => $r[0]['uid'],
 741                                 'link'             => System::baseUrl() . '/contacts/' . $dfrn_record,
 742                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
 743                                 'source_link'  => $r[0]['url'],
 744                                 'source_photo' => $r[0]['photo'],
 745                                 'verb'         => ($mutual?ACTIVITY_FRIEND:ACTIVITY_FOLLOW),
 746                                 'otype'        => 'intro'
 747                         ));
 748                 }
 749
 750                 // Send a new friend post if we are allowed to...
 751
 752                 if($page && intval(PConfig::get($local_uid,'system','post_joingroup'))) {
 753                         $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 754                                 intval($local_uid)
 755                         );
 756
 757                         if((DBM::is_result($r)) && ($r[0]['hide-friends'] == 0)) {
 758
 759                                 require_once 'include/items.php';
 760
 761                                 $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 762                                         intval($local_uid)
 763                                 );
 764
 765                                 if(count($self)) {
 766
 767                                         $arr = array();
 768                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $local_uid);
 769                                         $arr['uid'] = $local_uid;
 770                                         $arr['contact-id'] = $self[0]['id'];
 771                                         $arr['wall'] = 1;
 772                                         $arr['type'] = 'wall';
 773                                         $arr['gravity'] = 0;
 774                                         $arr['origin'] = 1;
 775                                         $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 776                                         $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 777                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 778
 779                                         $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 780                                         $APhoto = '[url=' . $self[0]['url'] . ']' . '[img]' . $self[0]['thumb'] . '[/img][/url]';
 781
 782                                         $B = '[url=' . $combined['url'] . ']' . $combined['name'] . '[/url]';
 783                                         $BPhoto = '[url=' . $combined['url'] . ']' . '[img]' . $combined['thumb'] . '[/img][/url]';
 784
 785                                         $arr['verb'] = ACTIVITY_JOIN;
 786                                         $arr['object-type'] = ACTIVITY_OBJ_GROUP;
 787                                         $arr['body'] =  sprintf( t('%1$s has joined %2$s'), $A, $B)."\n\n\n" .$BPhoto;
 788                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_GROUP . '</type><title>' . $combined['name'] . '</title>'
 789                                                 . '<id>' . $combined['url'] . '/' . $combined['name'] . '</id>';
 790                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $combined['url'] . '" />' . "\n");
 791                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $combined['thumb'] . '" />' . "\n");
 792                                         $arr['object'] .= '</link></object>' . "\n";
 793
 794                                         $arr['last-child'] = 1;
 795
 796                                         $arr['allow_cid'] = $user[0]['allow_cid'];
 797                                         $arr['allow_gid'] = $user[0]['allow_gid'];
 798                                         $arr['deny_cid']  = $user[0]['deny_cid'];
 799                                         $arr['deny_gid']  = $user[0]['deny_gid'];
 800
 801                                         $i = item_store($arr);
 802                                         if($i)
 803                                                 Worker::add(PRIORITY_HIGH, "Notifier", "activity", $i);
 804
 805                                 }
 806                         }
 807                 }
 808                 xml_status(0); // Success
 809                 return; // NOTREACHED
 810
 811                         ////////////////////// End of this scenario ///////////////////////////////////////////////
 812         }
 813
 814         // somebody arrived here by mistake or they are fishing. Send them to the homepage.
 815
 816         goaway(System::baseUrl());
 817         // NOTREACHED
 818
 819 }